Failure indication device for magnetic vibration isolator and application method thereof

Abstract

The present application relates to the field of rail transit, in particular to a magnetic type vibration isolator failure indicating device and its application method. The device comprises a fixed connecting seat and a height reference rod, and further comprises a warning head, a reverse pulling elastic element and a permanent magnetic suction head. The height reference rod partially penetrates the fixed connecting seat, and the warning head with a warning mark is arranged at the top of the height reference rod. The reverse pulling elastic element is arranged between the warning head and the fixed connecting seat or between the fixed connecting seat and the permanent magnetic suction head. The permanent magnetic suction head is arranged at the bottom of the height reference rod. The suction force of the permanent magnetic suction head is greater than the maximum rebound force of the reverse pulling elastic element, and is less than the total mass of the metal element fixed by the permanent magnetic suction head. A locking connection structure is arranged on the fixed connecting seat. The present application uses the magnetic type vibration isolator failure indicating device to monitor the working state of the steel spring vibration isolator of the built-in vibration isolation device in the floating slab track bed. The method is simple to operate, good in intuitiveness, high in accuracy, and has a very broad market application prospect.

Description

Technical Field

[0001] This invention relates to the field of rail transit, and more particularly to a monitoring and indicating device for displaying the working status of vibration isolators in a floating slab track structure for rail transit. Background Technology

[0002] In recent years, major and medium-sized cities have increasingly emphasized the development of rail transit. With the continuous expansion of rail transit operating mileage and scale, vibration and noise pollution problems have become increasingly prominent. To reduce interference with properties and residents above or around the tracks, high-level vibration isolation and reduction measures are generally adopted in special sections with sensitive environmental impact assessments. Currently, the most successful application is floating slab track isolation technology, especially the built-in steel spring floating slab track technology, which, as the highest level of vibration isolation, boasts stable performance, high vibration isolation efficiency, and convenient maintenance and replacement, thus its widespread application has become an industry consensus. However, while the elastic elements in the steel spring vibration isolators supporting the floating slabs can be replaced after natural failure or accidental damage, these isolators are built into the floating slab body and cannot be directly observed during routine inspections, posing significant challenges to daily monitoring. How to promptly understand and monitor the working status of the steel spring vibration isolators, so as to repair and replace the elastic elements as needed, has become a pressing problem that needs to be solved. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned defects and provide a magnetic vibration isolator failure indication device that is intuitive and easy to observe and identify.

[0004] The magnetic vibration isolator failure indication device of the present invention is implemented as follows: it includes a fixed connecting base and a height reference rod, as well as a warning head, a counter-tension elastic element, and a permanent magnet suction head. The height reference rod partially penetrates the fixed connecting base, and the warning head with a warning mark is set at the top of the height reference rod. The counter-tension elastic element is set between the warning head and the fixed connecting base or between the fixed connecting base and the permanent magnet suction head. The permanent magnet suction head is set at the bottom of the height reference rod. The attraction force of the permanent magnet suction head is greater than the maximum rebound force of the counter-tension elastic element and less than the total mass of the metal components externally attracted and fixed by the permanent magnet suction head. A locking connection structure is provided on the fixed connecting base.

[0005] In the magnetic vibration isolator failure indication device of this invention, the structure of the fixed connecting seat can vary. For example, the fixed connecting seat can be an outer tube with a cavity inside. A height reference rod penetrates the middle of the bottom of the outer tube and is partially disposed within the cavity. The warning head is fixedly disposed at the top of the height reference rod located inside the cavity, and the permanent magnet head is fixedly disposed at the bottom of the height reference rod located outside the cavity. Correspondingly, the anti-tension elastic element is a compression spring, which is sleeved on the height reference rod and located between the warning head and the bottom of the outer tube; or the anti-tension elastic element is a tension spring, which is disposed between the bottom of the outer tube and the permanent magnet head. Alternatively, the anti-tension elastic element is a tension spring, which is disposed between the bottom of the outer tube and the permanent magnet head. To facilitate connection and fixation with external structures, a locking connection structure is provided on the outer tube. The locking connection structure includes an external thread structure and a locking nut on the surface of the outer tube; or the locking connection structure includes a limiting boss, an external thread structure, and a locking nut on the outer tube. In addition, preferably, a stop limit shoulder is provided on the inner wall of the cavity of the outer tube corresponding to the lower part of the warning head, or a stop limit shoulder is provided on the height reference rod corresponding to the bottom of the cavity of the outer tube.

[0006] Alternatively, the fixed connecting seat can also be a connecting bracket, with the height reference rod partially penetrating through the connecting bracket. Correspondingly, the anti-tension elastic element is a compression spring, sleeved on the height reference rod and located between the warning head and the connecting bracket; or the anti-tension elastic element is a tension spring, positioned between the connecting bracket and the permanent magnet head. To facilitate connection and fixation with external structures, a locking connection structure is provided on the connecting bracket, comprising a connecting screw and a locking nut; or, the locking connection structure comprises a connecting screw hole, a locking nut, and a fixing bolt on the connecting bracket. Furthermore, preferably, a stop and limit shoulder is provided on the height reference rod corresponding to the connecting bracket.

[0007] The magnetic vibration isolator failure indicator device of the present invention may further include at least one elastic pad, which is disposed between the height reference rod and the permanent magnet head.

[0008] To prevent accidental short circuits, the fixed connecting seat and / or height reference rod in the magnetic vibration isolator failure indicator device of the present invention may be made of insulating material; or, the magnetic vibration isolator failure indicator device of the present invention may further include at least one insulating pad made of insulating material, which is disposed between the height reference rod and the permanent magnet head.

[0009] In addition, for ease of assembly, preferably, the warning head and the height reference rod are connected by a detachable fixed connection, which includes threaded connection, adhesive, interference fit connection or fastener connection.

[0010] It should be noted that the insulating materials described in this invention specifically include materials such as nylon, plastic, and bakelite. Furthermore, the warning markings on the warning head include colors that are both informative and easily identifiable, such as bright red or yellow; alternatively, the warning head can be made of fluorescent materials or other materials with warning marking functions. As long as it is easy for inspectors to visually identify, it can achieve a good technical effect.

[0011] In application, the magnetic vibration isolator failure indicator device of this invention is installed on the built-in vibration isolator in the floating slab track bed. Specifically, a locking connection structure is set on the fixed connecting seat to fix the fixed connecting seat to the end cover in the built-in vibration isolator. The working principle of this invention is explained below with the example of the permanent magnet head adsorbing on the top plate surface of the steel spring vibration isolator. The total height of the height reference rod is adjusted so that the warning head is hidden inside the outer sleeve or below the top surface of the end cover under normal circumstances. During the operation of the floating slab track bed, when the rail vehicle passes by, the height of the steel spring vibration isolator changes within the design range under normal load. Since the adsorption force of the permanent magnet head is greater than the maximum rebound force of the anti-tension elastic element, the adsorption force of the permanent magnet head ensures that the height reference rod is pulled to compress or release the anti-tension elastic element, thereby synchronously adapting to the steel spring vibration isolator. When the normal operating height of the spring isolator changes, and unexpected situations such as foundation settlement or spring breakage occur, the distance between the top plate of the steel spring isolator and the end cover increases abnormally. The steel spring isolator cannot provide normal elastic support and is in a failed state. At this time, the displacement change of the top plate of the steel spring isolator exceeds the displacement adjustment range of the height reference rod of the anti-pull elastic element in the magnetic isolator failure indicator device of this invention. The downward following movement of the permanent magnet head is stopped by the stop limit shoulder or the anti-pull elastic element. Since the attraction force of the permanent magnet head is less than the total mass of the metal components fixed by the permanent magnet head, that is, the attraction force of the permanent magnet head is less than the total mass of the top plate of the steel spring isolator, the permanent magnet head is forced to separate from the top plate of the steel spring isolator. The anti-pull elastic element rebounds, the height reference rod moves upward, causing the warning head to rise and be exposed above the end cover. In this way, during routine inspections during nightly skylight hours, inspectors can easily see the warning colors or lights on the warning heads, making it easy to identify steel spring vibration isolators that are not operating normally. This allows for timely maintenance and replacement, preventing safety accidents. Using the magnetic vibration isolator failure indicator device of this invention, inspectors can directly observe and judge the working status of the steel spring vibration isolators from above the floating plate, which is very convenient, significantly reduces labor intensity, lowers the rate of missed inspections, and provides a reliable basis for timely repair and maintenance.

[0012] Based on the above explanation of the application technology principles, another objective of this invention is to provide a method for monitoring the working status of a steel spring vibration isolator with a built-in vibration isolation device in a floating slab track bed using the aforementioned magnetic vibration isolator failure indicator device, which includes at least the following steps:

[0013] 1) After the floating slab track bed is lifted and leveled, firstly, using the locking connection structure set on the fixed connection seat, install and fix the magnetic vibration isolator failure indicator device on the end cover of the built-in vibration isolator. Then, the permanent magnet head is attracted to the top plate of the steel spring vibration isolator or the height adjustment shim or locking shim fixedly connected to it. Adjust the total length of the magnetic vibration isolator failure indicator device so that the warning head is hidden below the top surface of the end cover or inside the outer sleeve.

[0014] 2) Next, adjust the total length or spatial position of the height reference rod so that the downward stop stroke of the height reference rod is less than the design allowable stroke, and then lock the fixed connecting seat. The stop stroke refers to the height difference between the original position of the height reference rod under static load conditions and the position when it is stopped by the stop limit shoulder or the anti-tension elastic element; the design allowable stroke refers to the amount of downward displacement of the top plate of the steel spring vibration isolator relative to the original position of the top plate under static load conditions when the spring vibration isolator fails under support.

[0015] 3) When the steel spring vibration isolator fails due to unexpected reasons such as foundation settlement or spring breakage, the top plate of the steel spring vibration isolator, together with the height adjustment shims or locking shims fixed to it, sinks together under its own weight, causing the permanent magnet head and the height reference rod to sink together. When the sinking amount of the height reference rod reaches the stop stroke, the downward following movement of the height reference rod is stopped by the stop limit shoulder or the anti-pull elastic element. At this time, since the attraction force of the permanent magnet head is less than the total mass of the metal components fixed to the permanent magnet head, the permanent magnet head will immediately detach from the top plate of the steel spring vibration isolator or the height adjustment shims or locking shims fixed to it. The anti-pull elastic element rebounds, causing the warning head to automatically pop out and be exposed above the end cover. The warning mark on the warning head will attract the attention of the operation and inspection personnel, thereby guiding the inspection personnel to carry out timely inspection or repair.

[0016] It should be noted that there are various methods for adjusting the total length or spatial position of the height reference rod in step 2). For example, the spatial position of the height reference rod can be adjusted by adjusting the locking connection structure; the total length of the height reference rod can be adjusted by adjusting the threaded connection structure between the warning head and the height reference rod; in addition, the total length of the height reference rod can also be adjusted by setting elastic pads or insulating pads of different thicknesses. In practical applications, an appropriate adjustment method can be selected according to the specific structure of the magnetic vibration isolator failure indicator device of this invention. Furthermore, in practical applications, the allowable stroke of the steel spring vibration isolator after failure needs to be determined through extensive simulation tests based on the specific technical parameters of the spring elements selected in the steel spring vibration isolator. Because the downward stop travel of the height reference rod is less than the design allowable travel, it ensures that the height adjustment shim or locking shim fixedly connected to the top plate of the steel spring vibration isolator can disengage in time when the spring vibration isolator fails, or that the permanent magnet head can disengage from the top plate of the steel spring vibration isolator in time. This invention's magnetic vibration isolator failure indicator device can effectively trigger an alarm to staff, guiding inspection personnel to promptly inspect or repair the device. The difference between the design allowable travel and the stop travel is the safety margin.

[0017] In summary, the magnetic vibration isolator failure indicator device of this invention has advantages such as simple structure, easy manual observation and identification, and reliable effect. It can be widely used in floating slab track beds with built-in vibration isolation devices. Using this magnetic vibration isolator failure indicator device, on the one hand, the actual working condition of the steel spring vibration isolator can be accurately identified, making maintenance more targeted and saving significant manpower and resources; on the other hand, fault points of abnormal elastic supports caused by broken springs can be accurately detected, facilitating timely maintenance and elimination of hidden dangers, greatly improving operational safety and reliability. The method of monitoring the working status of steel spring vibration isolators with built-in vibration isolation devices in floating slab track beds using the magnetic vibration isolator failure indicator device of this invention is simple to operate, intuitive, and highly accurate, with a very broad market application prospect. Attached Figure Description

[0018] Figure 1 This is one of the structural schematic diagrams of the magnetic vibration isolator failure indicator device of the present invention.

[0019] Figure 2 for Figure 1 The diagram shown is one of the application schematics of the magnetic vibration isolator failure indicator device of the present invention.

[0020] Figure 3 for Figure 1 The second schematic diagram shows the application of the magnetic vibration isolator failure indicator device of the present invention.

[0021] Figure 4This is the second schematic diagram of the failure indicator device for the magnetic vibration isolator of the present invention.

[0022] Figure 5 This is the third schematic diagram of the failure indicator device for the magnetic vibration isolator of the present invention.

[0023] Figure 6 This is the fourth schematic diagram of the failure indicator device for the magnetic vibration isolator of the present invention.

[0024] Figure 7 This is the fifth schematic diagram of the failure indicator device for the magnetic vibration isolator of the present invention.

[0025] Figure 8 This is the sixth schematic diagram of the failure indicator device for the magnetic vibration isolator of the present invention.

[0026] Figure 9 This is the seventh schematic diagram of the failure indicator device for the magnetic vibration isolator of the present invention.

[0027] Figure 10 This is the eighth schematic diagram of the failure indicator device for the magnetic vibration isolator of the present invention. Detailed Implementation

[0028] Example 1

[0029] like Figure 1 The magnetic vibration isolator failure indicator device of the present invention includes a fixed connecting seat and a height reference rod 2. The fixed connecting seat is specifically an outer tube 1, and the inner cavity 3 is provided inside the outer tube 1. In addition, it includes a warning head 4, a counter-tension elastic element, and a permanent magnet head 6. The counter-tension elastic element is specifically a compression spring 5. The height reference rod 2 penetrates the middle of the bottom 18 of the outer tube 1 and is partially disposed within the cavity 3. A warning mark 7 made of fluorescent material is provided on the outer surface of the warning head 4. The warning head 4 is disposed within the cavity 3 of the height reference rod 2. On the top side, the warning head 4 is connected to the height reference rod 2 via a threaded connection structure. The compression spring 5 is sleeved on the height reference rod 2 and located between the warning head 4 and the bottom 18 of the outer tube 1. The permanent magnet head 6 is fixedly embedded in the bottom of the height reference rod 2 located outside the receiving cavity 3. The attraction force of the permanent magnet head 6 is greater than the maximum rebound force of the compression spring 5 and less than the total mass of the metal components that the permanent magnet head adsorbs and fixes to the outside. The outer tube 1 is also provided with a locking connection structure. In this example, the locking connection structure includes an external thread structure and a locking nut 8 provided on the surface of the outer tube 1.

[0030] When applying, such as Figure 2In the floating slab track structure shown, the connecting sleeve 12 with the built-in vibration isolation device is pre-fixed to the floating slab 9. The steel spring vibration isolator 11 is placed inside the connecting sleeve and supported at the bottom of the support block of the connecting sleeve 12 by the height adjustment shim 10, so that the floating slab 9 is separated from the foundation 14 and is in a state of elastic support. The magnetic vibration isolator failure indicator of the present invention is installed on the built-in vibration isolation device in the floating slab track bed. Specifically, the magnetic vibration isolator failure indicator of the present invention is first assembled. The upper part of the outer sleeve 1 is installed on the end cap 13 of the connecting sleeve 12 of the built-in vibration isolation device using the locking nut 8. The warning head 4 and the height reference rod 2 are pressed down to compress the compression spring 5 until the permanent magnet head 6 at the lower end of the height reference rod 2 is attracted to the top plate of the steel spring vibration isolator 11 of the built-in vibration isolation device. Since the attraction force of the permanent magnet head 6 is greater than the maximum rebound force of the compression spring 5, the compression spring 5 remains compressed. The position of the locking nut 8 is adjusted so that the warning head 4 is fully inserted into the receiving cavity 3 of the outer sleeve 1. The magnetic vibration isolator failure indicator of the present invention is locked and fixed on the end cap 13 using the locking connection structure. During the operation of the floating slab track bed, when rail vehicles pass by, the steel spring vibration isolators experience height changes within their design range under normal load. The attraction force of the permanent magnet head ensures that the height reference rod is pulled to compress or release the spring, thus synchronously adapting to the height changes of the steel spring vibration isolators. When unexpected situations such as foundation settlement or spring breakage occur, the steel spring vibration isolators cannot provide normal elastic support and are in a failed state. The top plate of the steel spring vibration isolator 11 moves downward under its own weight, driving the height reference rod and warning head downward through the permanent magnet head. The distance between the top plate of the steel spring isolator and the end cap 13 further increases. When the compression spring 5 is compressed to its deformation limit, the downward following motion of the permanent magnet head 6 is stopped by the counter-tension elastic element (i.e., the compression spring 5). Furthermore, since the attraction force of the permanent magnet head 6 on the top plate of the steel spring isolator 11 cannot overcome the total mass of the top plate, the permanent magnet head is forced to separate from the top plate. At this time, the compression spring 5 rebounds, pushing the warning head 4 out of the receiving cavity 3 of the outer sleeve 1, exposing it above the outer sleeve 1 and the end cap 13, as detailed below. Figure 3 As shown. In this way, the driver or inspection personnel during sunroof hours can easily see the fluorescent reflective warning sign on the warning head, thus easily identifying the steel spring vibration isolator in an abnormal working state, and thus promptly performing maintenance or replacement to avoid safety accidents. Using the magnetic vibration isolator failure indicator device of this invention, inspectors can intuitively observe and judge the working status of the spring vibration isolator from above the floating plate, which is very convenient, significantly reducing labor intensity and the rate of missed inspections, and providing a reliable basis for timely maintenance. Because the magnetic vibration isolator failure indicator device of this invention adopts a purely mechanical structure and does not require a power supply, its lifespan can reach decades, even the same as the steel spring vibration isolator, requiring minimal maintenance. Of course, based on... Figure 2The permanent magnet head of the magnetic vibration isolator failure indicator device of this invention can also be attached to the height adjustment shim or locking shim connected to the top plate of the steel spring vibration isolator, and can achieve the same technical effect. This is only explained in words here.

[0031] Based on the above explanation of the application technology principles, a method for monitoring the working status of steel spring vibration isolators with built-in vibration isolation devices in floating slab track beds using the magnetic vibration isolator failure indicator device of the present invention can be derived, which includes at least the following steps:

[0032] 1) After the floating slab track bed is lifted and leveled, firstly, using the locking connection structure set on the outer sleeve, the magnetic vibration isolator failure indicator device is installed and fixed on the end cover of the built-in vibration isolator. Then, the permanent magnet head is attracted to the top plate of the steel spring vibration isolator or the height adjustment shim or locking shim fixedly connected to it. Adjust the total length of the magnetic vibration isolator failure indicator device so that the warning head is hidden inside the outer sleeve.

[0033] 2) Next, adjust the total length or spatial position of the height reference rod so that the downward stop stroke of the height reference rod is less than the design allowable stroke, and then lock the fixed connecting seat. The stop stroke refers to the height difference between the original position of the height reference rod under static load conditions and the position when it is stopped by the anti-tension elastic element; the design allowable stroke refers to the amount of downward displacement of the top plate of the steel spring vibration isolator relative to the original position of the top plate under static load conditions when the spring vibration isolator fails under support.

[0034] 3) When the steel spring vibration isolator fails due to unexpected reasons such as foundation settlement or spring breakage, the top plate of the steel spring vibration isolator, together with the height adjustment shims or locking shims fixed to it, sinks together under its own weight, causing the permanent magnet head and the height reference rod to sink together. When the sinking amount of the height reference rod reaches the stop stroke, the downward following movement of the height reference rod is stopped by the stop limit shoulder or the anti-pull elastic element. At this time, since the attraction force of the permanent magnet head is less than the total mass of the metal components fixed to the permanent magnet head, the permanent magnet head will immediately detach from the top plate of the steel spring vibration isolator or the height adjustment shims or locking shims fixed to it. The anti-pull elastic element rebounds, causing the warning head to automatically pop out and be exposed above the end cover. The warning mark on the warning head will attract the attention of the operation and inspection personnel, thereby guiding the inspection personnel to carry out timely inspection or repair.

[0035] It should be noted that there are various methods for adjusting the total length or spatial position of the height reference rod in step 2). For example, the spatial position of the height reference rod can be adjusted by adjusting the locking connection structure; the total length of the height reference rod can be adjusted by adjusting the threaded connection structure between the warning head and the height reference rod. In practical applications, an appropriate adjustment method can be selected according to the specific structure of the magnetic vibration isolator failure indicator device of this invention. Furthermore, in practical applications, the allowable travel distance of the steel spring vibration isolator after failure needs to be determined through numerous simulation tests based on the specific technical parameters of the spring elements selected in the steel spring vibration isolator. Since the downward stop travel of the height reference rod is less than the allowable travel distance, it can be ensured that the height adjustment shim or locking shim fixedly connected to the top plate of the steel spring vibration isolator can disengage in time when the spring vibration isolator fails, or that the permanent magnet head can disengage from the top plate of the steel spring vibration isolator in time. This allows the magnetic vibration isolator failure indicator device of this invention to effectively trigger an alarm to the staff, guiding the inspection staff to promptly inspect or repair the device. The difference between the allowable travel distance and the stop travel distance is the safety margin.

[0036] In summary, the magnetic vibration isolator failure indicator device of this invention has advantages such as simple structure, easy manual observation and identification, and reliable effect. It can be widely used in floating slab track beds with built-in vibration isolation devices. Using this magnetic vibration isolator failure indicator device, on the one hand, the actual working condition of the steel spring vibration isolator can be accurately identified, making maintenance more targeted and saving significant manpower and resources; on the other hand, fault points of abnormal elastic supports caused by broken springs can be accurately detected, facilitating timely maintenance and elimination of hidden dangers, greatly improving operational safety and reliability. The method of monitoring the working status of steel spring vibration isolators with built-in vibration isolation devices in floating slab track beds using the magnetic vibration isolator failure indicator device of this invention is simple to operate, intuitive, and highly accurate, with a very broad market application prospect.

[0037] It should be noted that, based on the technical principles of this example, the warning labels on the outer surface of the warning head can be made of fluorescent materials, or materials with warning significance and easily identifiable colors, such as bright warning colors like red or yellow. Alternatively, the warning head can be made directly from materials with warning labeling functions, typically including fluorescent materials, etc. As long as it is easy for inspectors to identify with the naked eye, it can achieve a good technical effect. Furthermore... Figure 1For ease of assembly and maintenance, the warning head and the height reference rod are connected by a detachable fixed connection. Specifically, this detachable fixed connection is a threaded connection. Besides threaded connections, other fixed connections such as adhesive bonding, interference fits, snap-fit ​​connections, or fastener connections can also be used. Any connection that achieves a reliable connection and allows for disassembly when necessary can be applied in this invention. The above technical solutions are merely simple variations based on the technical principles of this invention and are all within the scope of protection claimed by this invention. They are described in words only and will not be illustrated with accompanying drawings.

[0038] Example 2

[0039] like Figure 4 The magnetic vibration isolator failure indicator device of the present invention differs from that of Embodiment 1 in that the accommodating cavity 3 inside the outer sleeve 1 adopts a stepped structure, and a stop limiting shoulder 26 is provided in the accommodating cavity 3 corresponding to the lower part of the warning head 4; the height reference rod 2 is made of insulating material, and the permanent magnet head 6 is fixedly connected to the height reference rod 2 by the positioning pin 16; in addition, the locking connection structure includes a limiting boss 15, an external thread structure and a locking nut 8 provided on the outer sleeve.

[0040] The application method of the magnetic vibration isolator failure indicator device of the present invention described in this example is basically the same as that described in Embodiment 1, and will not be repeated here. It should be noted that the difference lies in the fact that during application, when unexpected situations such as foundation settlement or spring breakage occur, the steel spring vibration isolator cannot provide normal elastic support and is in a failed state. The top plate of the steel spring vibration isolator moves downward under its own weight, driving the height reference rod and warning head downward through the permanent magnet suction head. As the distance between the top plate of the steel spring vibration isolator and the end cover further increases, when the warning head 4 contacts the stop limit shoulder 26, the downward following movement of the permanent magnet suction head 6 is stopped by the stop limit shoulder 26. Furthermore, because the permanent magnet suction head 6... When the attraction force on the top plate of the steel spring isolator cannot overcome the total mass of the top plate, the permanent magnet head is forced to separate from the top plate. At this time, the compression spring 5 rebounds, pushing the warning head 4 out of the receiving cavity 3 of the outer sleeve 1 and exposing it above the outer sleeve 1 and end cap 13. In this way, the driver or the inspection personnel during the sunroof period can easily see the fluorescent reflection of the warning sign on the warning head, thus easily identifying the steel spring isolator in an abnormal working state, and then promptly performing maintenance and replacement to avoid safety accidents.

[0041] Compared with Example 1, the method for monitoring the working status of the steel spring vibration isolator with built-in vibration isolation device in a floating slab track bed using the magnetic vibration isolator failure indication device of the present invention described in this example includes at least the following steps:

[0042] 1) After the floating slab track bed is lifted and leveled, firstly, using the locking connection structure set on the outer sleeve, the magnetic vibration isolator failure indicator device is installed and fixed on the end cover of the built-in vibration isolator. Then, the permanent magnet head is attracted to the top plate of the steel spring vibration isolator or the height adjustment shim or locking shim fixedly connected to it. Adjust the total length of the magnetic vibration isolator failure indicator device so that the warning head is hidden inside the outer sleeve.

[0043] 2) Next, adjust the total length or spatial position of the height reference rod so that the downward stop stroke of the height reference rod is less than the design allowable stroke, and then lock the fixed connecting seat. The stop stroke refers to the height difference between the original position of the height reference rod under static load conditions and the position when it is stopped by the stop limit shoulder; the design allowable stroke refers to the amount of downward displacement of the top plate of the steel spring vibration isolator relative to the original position of the top plate under static load conditions when the spring vibration isolator fails under support.

[0044] 3) When the steel spring vibration isolator fails due to unexpected reasons such as foundation settlement or spring breakage, the top plate of the steel spring vibration isolator, together with the height adjustment shims or locking shims fixed to it, sinks together under its own weight, causing the permanent magnet head and the height reference rod to sink together. When the sinking amount of the height reference rod reaches the stop stroke, the downward following movement of the height reference rod is stopped by the stop limit shoulder. At this time, since the attraction force of the permanent magnet head is less than the total mass of the metal components fixed to the outside by the permanent magnet head, the permanent magnet head will immediately detach from the top plate of the steel spring vibration isolator or the height adjustment shims or locking shims fixed to it, and the elastic element will rebound, causing the warning head to automatically pop out and be exposed above the end cover. The warning mark on the warning head will attract the attention of the operation and inspection personnel, thereby guiding the inspection personnel to carry out timely inspection or repair.

[0045] Furthermore, compared to Embodiment 1, in the technical solution described in this example, since the height reference rod is made of insulating material, it can effectively prevent accidental conduction and block diffuse current, making it safer and more reliable, and helping to extend the service life of the system.

[0046] based on Figure 4 The technical principle described in the technical solution states that the stop and limit shoulder can be set in various ways. Besides setting the stop and limit shoulder within the receiving cavity, for example... Figure 5 The magnetic vibration isolator failure indicator device of the present invention is shown below, and Figure 4 The difference in the technical solution is that the height reference rod 2 adopts a stepped structure, and a stop and limit shoulder 26 is set on the height reference rod 2. The stop and limit shoulder 26 is set above the bottom 18 of the outer tube 1, which can also achieve the same technical effect and is also within the protection scope claimed by the present invention.

[0047] Example 3

[0048] like Figure 6 The magnetic vibration isolator failure indicator device of the present invention is shown below, and Figure 4 The difference in the technical solution shown is that, in the locking connection structure, the limiting boss 15 is located below the locking nut 8; in addition, it also includes an elastic pad 17, which is located between the height reference rod 2 and the permanent magnet head 6. The elastic pad 17 and the permanent magnet head 6 are connected to the height reference rod 2 as a whole by fasteners 19; furthermore, the height reference rod 2 is made of steel, and the outer sleeve 1 is made of insulating material, specifically nylon.

[0049] The application method of the technical solution described in this example is basically the same as that of the technical solution described in Embodiment 2, and will not be repeated here. Compared with Embodiment 2, the outer sleeve in this example is made of insulating material, which can also prevent accidental conduction or block diffuse current. Of course, based on the technical principles described in this example and Embodiment 2, the height reference rod and the outer sleeve can also be made entirely of insulating material, which will have a better insulation effect. In practice, it can be designed and selected according to needs. In addition, since elastic pads are added in this example, on the one hand, high-frequency vibration can be isolated by the elastic pads, which is beneficial to extending the service life of the product. On the other hand, the distance between the permanent magnet head and the warning head can be adjusted more conveniently and accurately, making it more applicable. It should be noted that the number of elastic pads can be set as needed. It can be one, two, or even more, all of which can achieve good technical effects and are within the protection scope claimed by this invention.

[0050] Based on the technical principles of this example, such as Figure 7 In the magnetic vibration isolator failure indicator device of the present invention shown, the elastic pad 17 and the permanent magnet head 6, as well as the elastic pad 17 and the height reference rod 2, can be connected by positioning pins 16 respectively; in addition, the specific structural form of the limiting boss 15 can also be varied, and it can also be... Figure 7 The local annular protrusions shown are illustrated. All the above technical solutions are based on... Figure 6 Simple variations of the technical principles of this invention described herein are all within the scope of protection claimed by this invention.

[0051] It should be noted that the insulating materials described in this invention specifically include materials such as nylon, plastic, and bakelite. For example... Figure 7 In the technical solution shown, both the outer sleeve 1 and the height reference rod 2 can be made of insulating nylon material.

[0052] Example 4

[0053] like Figure 8 The magnetic vibration isolator failure indicator device of the present invention is shown below, and Figure 7The difference in the technical solution shown is that the anti-tension elastic element is specifically a tension spring 20; in addition, it also includes an insulating pad 21, which is made of insulating material and is disposed between the height reference rod 2 and the permanent magnet head 6.

[0054] and Figure 7 Compared to the technical solution shown, the addition of insulating pads 21 in this example offers several advantages. Firstly, when used in conjunction with an insulating outer sleeve 1, it effectively prevents accidental electrical conduction and blocks diffuse current, making it safer, more reliable, and extending the system's lifespan. Secondly, the insulating pads 21 allow for more convenient and accurate adjustment of the distance between the permanent magnet head and the warning head, improving its applicability. The specific number of insulating pads can be designed according to needs, and can be two or more. Furthermore, the use of a tension spring as a counter-tension elastic element in this example provides a wider range of material choices, which can be selected based on specific requirements such as product cost and lifespan in practical applications.

[0055] It should be particularly noted that, according to the technical principles described in Embodiments 3 and 4, in the method for monitoring the working status of the steel spring vibration isolator of the built-in vibration isolation device in the floating slab track bed using the magnetic vibration isolator failure indicator device of the present invention, when adjusting the total length of the height reference rod in step 2), it can also be achieved by setting an elastic pad or insulating pad of appropriate thickness, which can also achieve good technical results. In practical applications, an appropriate adjustment method can be selected according to the specific structure of the magnetic vibration isolator failure indicator device of the present invention.

[0056] Example 5

[0057] like Figure 9 The magnetic vibration isolator failure indicator device of the present invention differs from that of Embodiment 1 in that the fixed connecting seat is a connecting bracket 22, the height reference rod 2 partially penetrates the connecting bracket 22, and a locking connection structure is provided on the connecting bracket 22. The locking connection structure includes a connecting screw 23 and a locking nut 8 fixedly installed on the connecting bracket. The anti-tension elastic element is a compression spring 5, which is sleeved on the height reference rod 2 and located between the warning head 4 and the connecting bracket 22. A warning mark 7 is provided on the outer surface of the warning head 4, which is specifically a yellow warning color layer sprayed on the surface of the warning head 4. The permanent magnet head 6 is fixedly connected to the height reference rod 2 by a positioning pin 16. The height reference rod 2 is made of insulating plastic material.

[0058] In application, when the magnetic vibration isolator failure indicator device of the present invention is connected and assembled with the end cover as described in this example, the connecting screw 23 and the locking nut 8 are used to cooperate with the end cover to fix the magnetic vibration isolator failure indicator device of the present invention onto the end cover. It should be noted that an additional through hole needs to be provided on the end cover to cooperate with the warning head and the height reference rod. Its working principle is basically the same as that described in Embodiment 1, and will not be repeated here. Compared with Embodiment 1, using the connecting bracket as the fixed connecting seat makes the part structure simpler and the processing more convenient; the height reference rod 2 is made of insulating plastic material, which can also prevent accidental conduction or block diffuse current. Of course, based on the technical principle of this example, the connecting bracket can also be made of insulating material. This is only described in words here, and it is also within the scope of protection claimed by the present invention.

[0059] The method for monitoring the working status of the steel spring vibration isolator with built-in vibration isolation device in a floating slab track bed using the magnetic vibration isolator failure indicator device described in this example is as follows, and it includes at least the following steps:

[0060] 1) After the floating slab track bed is leveled and lifted, firstly, using the locking connection structure set on the connecting bracket, the magnetic vibration isolator failure indicator device is installed and fixed on the end cover of the built-in vibration isolator. Then, the permanent magnet head is attracted to the top plate of the steel spring vibration isolator or the height adjustment shim or locking shim fixedly connected to it. Adjust the total length of the magnetic vibration isolator failure indicator device so that the warning head is hidden below the top surface of the end cover.

[0061] 2) Next, adjust the total length or spatial position of the height reference rod so that the downward stop stroke of the height reference rod is less than the design allowable stroke, and then lock the fixed connecting seat. The stop stroke refers to the height difference between the original position of the height reference rod under static load conditions and the position when it is stopped by the stop limit shoulder or the anti-tension elastic element; the design allowable stroke refers to the amount of downward displacement of the top plate of the steel spring vibration isolator relative to the original position of the top plate under static load conditions when the spring vibration isolator fails under support.

[0062] 3) When the steel spring vibration isolator fails due to unexpected reasons such as foundation settlement or spring breakage, the top plate of the steel spring vibration isolator, together with the height adjustment shims or locking shims fixed to it, sinks together under its own weight, causing the permanent magnet head and the height reference rod to sink together. When the sinking amount of the height reference rod reaches the stop stroke, the downward following movement of the height reference rod is stopped by the anti-pull elastic element. At this time, since the attraction force of the permanent magnet head is less than the total mass of the metal components fixed to it, the permanent magnet head will immediately detach from the top plate of the steel spring vibration isolator or the height adjustment shims or locking shims fixed to it. The anti-pull elastic element rebounds, causing the warning head to automatically pop out and be exposed above the end cover. The warning mark on the warning head will attract the attention of the operation and inspection personnel, thereby guiding them to carry out timely inspection or repair.

[0063] Example 6

[0064] like Figure 10 The magnetic vibration isolator failure indicator device of the present invention differs from that of Embodiment 5 in that the warning head 4 is made directly of fluorescent material with warning recognition function; the anti-tension elastic element is a tension spring 20, which is disposed between the connecting bracket 22 and the permanent magnet head 6; it also includes an insulating pad 21, which is made of insulating material and is disposed between the height reference rod 2 and the permanent magnet head 6; the locking connection structure includes a connecting screw hole 25, a locking nut 8 and a fixing bolt 24 provided on the connecting bracket 22; in addition, the height reference rod 2 adopts a stepped structure, and a stop limiting shoulder 26 is provided on the height reference rod 2 corresponding to the connecting bracket 22, and the stop limiting shoulder 26 is located above the part of the height reference rod 2 and the connecting bracket 22 that mates.

[0065] Compared to Example 5, in this example, when connecting and assembling the magnetic vibration isolator failure indicator device of the present invention with the end cover, the device is fixed to the end cover using the fixing bolts 24 and locking nuts 8 and the connecting screw holes 25, which is equally convenient. In this example, a tension spring is used as the anti-tension elastic element, providing a wider range of material choices for the product. In practical applications, the choice can be made according to specific needs such as product cost and service life. Of course, the specific number of tension springs can be designed and selected according to engineering needs. Furthermore, the addition of insulating pads 21, on the one hand, can effectively prevent accidental conduction and block diffuse current when used with the connecting bracket 22 made of insulating material, making it safer and more reliable, and helping to extend the system's service life. On the other hand, the insulating pads 21 can also be used to more conveniently and accurately adjust the distance between the permanent magnet head and the warning head, improving applicability. Of course, the specific number of insulating pads can be designed according to needs, and can be two or even more.

[0066] It should be noted that, as can be seen from the technical principles described in Embodiments 1 to 6, the specific form of the detachable fixed connection between the warning head and the height reference rod can be varied. This detachable fixed connection includes threaded connections, adhesive bonding, interference fit connections, or fastener connections, etc., all of which are applicable to the magnetic vibration isolator failure indicator device of this invention. Furthermore, in addition to adding insulating pads, elastic pads can also be added between the height reference rod and the permanent magnet head to isolate high-frequency vibrations and extend the product's service life. Additionally, for technical solutions where the warning head is directly made of fluorescent material with warning recognition function, to avoid misjudgment caused by the warning recognition effect displayed on the top of the warning head during daily use, a special covering layer or cover can be provided on the top surface of the warning head to completely block the warning recognition effect, thus preventing misjudgment. These are all simple variations based on the technical principles of this invention, described only in words here, and are all within the scope of protection claimed by this invention.

[0067] Compared with Example 5, the method for monitoring the working status of the steel spring vibration isolator with built-in vibration isolation device in a floating slab track bed using the magnetic vibration isolator failure indication device of the present invention described in this example includes at least the following steps:

[0068] 1) After the floating slab track bed is leveled and lifted, firstly, using the locking connection structure set on the connecting bracket, the magnetic vibration isolator failure indicator device is installed and fixed on the end cover of the built-in vibration isolator. Then, the permanent magnet head is attracted to the top plate of the steel spring vibration isolator or the height adjustment shim or locking shim fixedly connected to it. Adjust the total length of the magnetic vibration isolator failure indicator device so that the warning head is hidden below the top surface of the end cover.

[0069] 2) Next, adjust the total length or spatial position of the height reference rod so that the downward stop stroke of the height reference rod is less than the design allowable stroke, and then lock the fixed connecting seat. The stop stroke refers to the height difference between the original position of the height reference rod under static load conditions and the position when it is stopped by the stop limit shoulder; the design allowable stroke refers to the amount of downward displacement of the top plate of the steel spring vibration isolator relative to the original position of the top plate under static load conditions when the spring vibration isolator fails under support.

[0070] 3) When the steel spring vibration isolator fails due to unexpected reasons such as foundation settlement or spring breakage, the top plate of the steel spring vibration isolator, together with the height adjustment shims or locking shims fixed to it, sinks together under its own weight, causing the permanent magnet head and the height reference rod to sink together. When the sinking amount of the height reference rod reaches the stop stroke, the downward following movement of the height reference rod is stopped by the stop limit shoulder. At this time, since the attraction force of the permanent magnet head is less than the total mass of the metal components fixed to the outside by the permanent magnet head, the permanent magnet head will immediately detach from the top plate of the steel spring vibration isolator or the height adjustment shims or locking shims fixed to it, and the elastic element will rebound, causing the warning head to automatically pop out and be exposed above the end cover. The warning mark on the warning head will attract the attention of the operation and inspection personnel, thereby guiding the inspection personnel to carry out timely inspection or repair.

[0071] This invention relates to a magnetic vibration isolator failure indicator device. It features a simple structure, ingenious design, reliable operation, high cost-effectiveness, and intuitive and reliable monitoring results. It accurately reflects the working condition of the steel spring vibration isolator, reducing the difficulty of manual inspection and improving efficiency. When applied to floating slab track structures, it can promptly detect abnormalities in the steel spring vibration isolators, preventing serious accidents and providing strong protection for safe production operations and the prevention of personal injury. This invention also provides a method for monitoring the working status of steel spring vibration isolators with built-in vibration isolation devices in floating slab track structures using a magnetic vibration isolator failure indicator device. This method is simple to operate, intuitive, and highly accurate, with a very broad market application prospect. This invention is not limited to the applications described in the above embodiments. Based on the technical principles described herein, related technical solutions can also be used interchangeably, all within the scope of protection claimed by this invention.

Claims

1. A magnetic vibration isolator failure indicator device, comprising a fixed connecting base and a height reference rod, characterized in that, It also includes a warning head, a counter-tension elastic element, and a permanent magnet suction head. The height reference rod partially penetrates the fixed connecting seat. The warning head with a warning label is set at the top of the height reference rod. The counter-tension elastic element is set between the warning head and the fixed connecting seat or between the fixed connecting seat and the permanent magnet suction head. The permanent magnet suction head is set at the bottom of the height reference rod. The attraction force of the permanent magnet suction head is greater than the maximum rebound force of the counter-tension elastic element and less than the total mass of the metal components attracted and fixed by the permanent magnet suction head. A locking connection structure is provided on the fixed connecting seat. The fixed connection seat is an outer tube with a cavity inside. The height reference rod passes through the middle of the bottom of the outer tube and is partially set inside the cavity. The warning head is fixedly set at the top of the height reference rod inside the cavity, and the permanent magnet suction head is fixedly set at the bottom of the height reference rod outside the cavity. The anti-pull elastic element is a compression spring, which is sleeved on the height reference rod and located between the warning head and the bottom of the outer tube; or the anti-pull elastic element is a tension spring, which is located between the bottom of the outer tube and the permanent magnet head.

2. The magnetic vibration isolator failure indication device according to claim 1, characterized in that, A stop limit shoulder is provided on the inner wall of the cavity of the outer tube, corresponding to the lower part of the warning head, or a stop limit shoulder is provided on the height reference rod corresponding to the bottom of the cavity of the outer tube.

3. The magnetic vibration isolator failure indication device according to claim 1, characterized in that, The fixed connecting seat is a connecting bracket, and the height reference rod partially penetrates the connecting bracket.

4. The magnetic vibration isolator failure indication device according to claim 3, characterized in that, The anti-pull elastic element is a compression spring, which is sleeved on the height reference rod and located between the warning head and the connecting bracket; or the anti-pull elastic element is a tension spring, which is located between the connecting bracket and the permanent magnet head.

5. The magnetic vibration isolator failure indication device according to claim 3 or 4, characterized in that, A stop limit shoulder is set on the corresponding connecting bracket on the height reference rod.

6. The magnetic vibration isolator failure indication device according to claim 1, characterized in that, The outer tube is provided with a locking connection structure, which includes an external thread structure and a locking nut on the surface of the outer tube; or, the locking connection structure includes a limiting boss, an external thread structure and a locking nut on the outer tube.

7. The magnetic vibration isolator failure indication device according to claim 3, characterized in that, A locking connection structure is provided on the connecting bracket, the locking connection structure including a connecting screw and a locking nut provided on the connecting bracket; or, the locking connection structure includes a connecting screw hole, a locking nut and a fixing bolt provided on the connecting bracket.

8. The magnetic vibration isolator failure indication device according to claim 1, characterized in that, It also includes at least one elastic pad, which is disposed between the height reference rod and the permanent magnet head.

9. The magnetic vibration isolator failure indication device according to any one of claims 1, 3-4, and 6-7, characterized in that, It also includes at least one insulating pad made of insulating material, which is disposed between the height reference rod and the permanent magnet head.

10. The magnetic vibration isolator failure indication device according to any one of claims 1, 3-4, and 6-7, characterized in that, The fixed connection seat and / or height reference rod are made of insulating material.

11. The magnetic vibration isolator failure indication device according to any one of claims 1, 3-4, and 6-7, characterized in that, The warning head and the height reference rod are connected by a detachable fixed connection, which includes threaded connection, adhesive, interference fit connection or fastener connection.

12. A method for monitoring the working status of a steel spring vibration isolator with a built-in vibration isolation device in a floating slab track bed using a magnetic vibration isolator failure indicator device according to any one of claims 1-11, characterized in that, It should include at least the following steps: 1) After the floating slab track bed is lifted and leveled, firstly, using the locking connection structure set on the fixed connection seat, install and fix the magnetic vibration isolator failure indicator device on the end cover of the built-in vibration isolator. Then, the permanent magnet head is attracted to the top plate of the steel spring vibration isolator or the height adjustment shim or locking shim fixedly connected to it. Adjust the total length of the magnetic vibration isolator failure indicator device so that the warning head is hidden below the top surface of the end cover or inside the outer sleeve. 2) Next, adjust the total length or spatial position of the height reference rod so that the downward stop stroke of the height reference rod is less than the design allowable stroke, and then lock the fixed connecting seat. The stop stroke refers to the height difference between the original position of the height reference rod under static load conditions and the position when it is stopped by the stop limit shoulder or the anti-tension elastic element; the design allowable stroke refers to the amount of downward displacement of the top plate of the steel spring vibration isolator under gravity relative to the original position of the top plate under static load conditions when the support of the steel spring vibration isolator fails. 3) When the steel spring vibration isolator fails, the top plate of the steel spring vibration isolator, together with the height adjustment shim or locking shim fixed to it, sinks together under its own weight, causing the permanent magnet head and the height reference rod to sink together. When the sinking amount of the height reference rod reaches the stop stroke, the downward following movement of the height reference rod is stopped by the stop limit shoulder or the counter-tension elastic element. At this time, since the attraction force of the permanent magnet head is less than the total mass of the metal components fixed to the outside by the permanent magnet head, the permanent magnet head will immediately detach from the top plate of the steel spring vibration isolator or the height adjustment shim or locking shim fixed to it. The counter-tension elastic element rebounds, causing the warning head to automatically pop out and expose itself above the end cover to warn the staff.

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