A replaceable and adjustable combined seismic isolation device for steel connecting corridors

Abstract

This application provides a replaceable and adjustable combined seismic isolation device for steel connecting corridors, relating to the field of building engineering technology. The device includes an upper support and an anti-pull-out mechanism. The anti-pull-out mechanism is located at the bottom of the upper support and includes a first magnet, a second magnet, and a rotating shaft ball. The second magnet is located at the bottom of the first magnet, and the rotating shaft ball is located outside the first and second magnets. The first magnet applies a traction force to the second magnet. In this application, when the swing amplitude is too large, the pressure spring is compressed, increasing the distance between the two connecting shafts, ensuring stable movement of the upper and lower supports. This avoids the separation of the internal structure of the seismic isolation device, which would reduce internal friction and worsen the effect, thus preventing economic losses due to safety accidents.

Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, and in particular to a replaceable and adjustable combined seismic isolation device for steel connecting corridors. Background Technology

[0002] Steel connecting corridors are passageways that use steel as the main structural material to connect different buildings or areas. They are characterized by high strength, light weight, high degree of industrialization, and flexible assembly and disassembly. They are widely used in commercial, medical, educational, industrial and urban public spaces, facilitating the flow of people and goods and also serving as landscape features.

[0003] Steel connecting corridors, as elevated passageways linking different building structures, often have large spans and relatively weak rigidity, and their connection nodes with the main structure are prone to becoming weak points in terms of stress. During an earthquake, the vibration characteristics of the main structure and the connecting corridor differ, easily resulting in large relative displacements and internal forces, leading to node failure or corridor collapse. Seismic isolation devices, installed at the connection nodes, can isolate or mitigate the transmission of seismic energy to the connecting corridor through flexible horizontal deformation, reducing the relative forces between the main structure and the connecting corridor. At the same time, they absorb seismic energy through energy-dissipating elements, thereby protecting the safety of the connecting corridor structure and avoiding risks such as fractures and falls caused by earthquakes, ensuring that it can maintain functional stability during earthquakes.

[0004] Currently available steel corridor seismic isolation devices can effectively ensure the structural stability of steel corridors during earthquakes, using their own structure to cope with the shaking caused by earthquakes. However, the main body of the steel corridor is mostly located in mid-air. When encountering strong winds, the large surface area of ​​the steel corridor results in greater wind resistance, which can easily cause upward lifting forces on the steel corridor, leading to the separation of the internal structure of the bottom seismic isolation device. In the event of a sudden earthquake, the friction of the internal structure of the seismic isolation device decreases, resulting in a poorer seismic isolation effect, which can easily lead to safety accidents and economic losses.

[0005] Therefore, we propose a replaceable and adjustable combined seismic isolation device for steel connecting corridors to solve the problems mentioned above. Utility Model Content

[0006] To address the shortcomings of existing technologies, this application provides a method for addressing the issue that when a steel connecting corridor encounters strong winds and its bottom is subjected to an upward blowing force, the top mounting block of the upper support and the bottom mounting block of the lower support of the seismic isolation device are connected via a first connecting shaft and a second connecting shaft, increasing vertical tension. Simultaneously, the first and second magnets magnetically attract each other to prevent the supports from separating. A movable shaft locking block engages with a sliding locking hole for limitation, and a pressure spring maintains the limitation, ensuring structural stability and device operation. During an earthquake, the supports counteract the shaking through internal displacement. The connecting shafts swing with the shaking, releasing the magnetic attraction of the magnets. When the swing is excessive, the pressure spring compresses, increasing the distance between the connecting shafts and ensuring stable support movement. This prevents internal structural separation and reduced friction, thus avoiding deterioration in performance and preventing safety accidents and economic losses.

[0007] To achieve the above objectives, this application provides the following technical solution: a replaceable and adjustable combined seismic isolation device for steel connecting corridors, comprising an upper support and an anti-pull-out mechanism. The anti-pull-out mechanism is disposed at the bottom of the upper support and includes a first magnet, a second magnet, and a rotating shaft ball. The second magnet is disposed at the bottom of the first magnet, and the rotating shaft ball is disposed on the outside of the first magnet and the second magnet. The first magnet is used to apply a traction force to the second magnet, and the rotating shaft ball is used to release the traction force between the first magnet and the second magnet.

[0008] By adopting the above technical solution, when the steel connecting corridor equipped with this seismic isolation device encounters strong winds, especially when the bottom is subjected to upward blowing force, the top mounting block of the upper support is connected to the bottom mounting block of the lower support through the first and second connecting shafts, increasing the vertical tension between the two. The first magnet on the outside of the first connecting shaft and the second magnet on the inside of the bottom mounting block generate magnetic attraction, preventing the upper and lower supports from separating. The bottom locking block of the movable shaft engages with the sliding locking hole to limit the movement and prevent the two connecting shafts from detaching. The pressure spring maintains the limit with its elasticity, ensuring the stability of the vertical structure and the normal movement of the device. During an earthquake, the upper and lower supports resist the shaking by shifting their internal structures. The rotating shaft ball causes the two connecting shafts to swing with the shaking. At this time, the positions of the two magnets shift, and the magnetic attraction is released. When the swing amplitude is too large, the pressure spring is compressed, and the distance between the two connecting shafts increases, ensuring the stable movement of the upper and lower supports. This avoids the separation of the internal structure of the seismic isolation device, which would reduce the internal friction and reduce the effect, thus avoiding economic losses caused by safety accidents.

[0009] As a preferred technical solution of this application, when the steel connecting corridor encounters strong winds and its bottom is subjected to upward blowing force, the top mounting block of the upper support and the bottom mounting block of the lower support of the seismic isolation device are connected by the first connecting shaft and the second connecting shaft to increase the vertical tension. At the same time, the first magnet and the second magnet magnetically attract each other to prevent the support from separating. The movable shaft locking block engages with the sliding locking hole for limitation, and the pressure spring maintains the limitation, ensuring structural stability and device operation. During an earthquake, the support counteracts the shaking by internal displacement. The connecting shaft swings with the shaking, causing the magnet to release its magnetic attraction. When the swing is too large, the pressure spring is compressed, and the distance of the connecting shaft increases, ensuring stable movement of the support. This avoids the separation of the internal structure of the device and the reduction of friction, which would lead to a deterioration in performance and prevent safety accidents and economic losses.

[0010] By adopting the above technical solution, during an earthquake, the upper and lower supports counteract the shaking by shifting their internal structures. The rotating ball bearing causes the two connecting shafts to swing with the shaking. At this time, the positions of the two magnets shift, and the magnetic attraction is released. When the swing amplitude is too large, the pressure spring is compressed, and the distance between the two connecting shafts increases, ensuring the stable movement of the upper and lower supports. This avoids the separation of the internal structure of the seismic isolation device, which would reduce the internal friction and thus worsen the effect, avoiding economic losses caused by safety accidents.

[0011] As a preferred technical solution of this application, a replaceable and adjustable combined seismic isolation device for steel connecting corridors includes an upper support and an anti-pull-out mechanism, wherein the anti-pull-out mechanism is disposed at the bottom of the upper support.

[0012] The pull-out resistance mechanism includes a first magnet, a second magnet, and a rotating ball. The second magnet is disposed at the bottom of the first magnet, and the rotating ball is disposed on the outside of the first magnet and the second magnet. The first magnet is used to apply a traction force to the second magnet, and the rotating ball is used to release the traction force between the first magnet and the second magnet.

[0013] By adopting the above technical solution, when the steel connecting corridor equipped with this seismic isolation device encounters strong winds, especially when the strong wind blows the steel connecting corridor in an irregular direction, the top mounting block on the inner side of the upper support is connected to the bottom mounting block on the inner side of the lower support through the first connecting shaft and the second connecting shaft, thereby increasing the tension in the vertical direction of the upper and lower supports.

[0014] As a preferred technical solution of this application, the pull-out resistance mechanism further includes a first connecting shaft, the top of the first connecting shaft is fixedly connected to the rotating shaft ball, a top mounting block is rotatably connected to the outer side of the rotating shaft ball, a plurality of slots are provided on the outer side of the first connecting shaft, and a movable shaft is fixedly connected to the bottom of the first connecting shaft.

[0015] By adopting the above technical solution, and with a first magnet provided on the outer side of the first connecting shaft and a second magnet provided on the inner side of the bottom mounting block, the magnetic attraction between the first magnet and the second magnet is used to prevent the upper support and the lower support from easily separating when the steel connecting corridor is blown by the wind.

[0016] As a preferred technical solution of this application, a pressure spring is sleeved on the outer side of the movable shaft, a first magnet is installed on the outer side of the first connecting shaft, a locking block is slidably connected to the top of the first magnet, a second connecting shaft is slidably connected to the outer side of the first connecting shaft, the top of the movable shaft is a cylindrical shaft, and the bottom of the top of the movable shaft is a cylindrical locking block with a larger diameter and a lower height.

[0017] By adopting the above technical solution, in order to ensure the vertical structural stability between the upper and lower supports while allowing the vibration isolation device to move normally, the movable shaft is limited by engaging and sliding between the bottom locking block and the sliding locking hole.

[0018] As a preferred technical solution of this application, the bottom of the second connecting shaft is fixedly connected to another rotating shaft ball, and the outer side of the other rotating shaft ball is rotatably connected to a bottom mounting block. A magnet mounting groove is opened on the inner side of the bottom mounting block, and the second magnet is located inside the magnet mounting groove.

[0019] By adopting the above technical solution, the first connecting shaft and the second connecting shaft are prevented from separating. A pressure spring is provided between the locking block and the sliding locking hole. The pressure spring maintains the locking block and the sliding locking hole in a limited state through its own elasticity.

[0020] As a preferred technical solution of this application, the inner side of the upper support is provided with a plurality of upper sleeves, the bottom of the upper support is provided with a steel plate partition, the outer side of the bottom of the steel plate partition is provided with a support body, the inner side of the bottom of the support body is provided with another steel plate partition, the bottom of the other steel plate partition is provided with a lower support, and the inner side of the lower support is provided with a lower sleeve.

[0021] By adopting the above technical solution, during an earthquake, the upper support and the lower support need to be offset by the mutual displacement of the internal structure of the support body to counteract the shaking caused by the earthquake. At this time, the rotation of the rotating shaft ball with the top mounting block and the bottom mounting block respectively allows the first connecting shaft and the second connecting shaft to swing in the direction of the shaking.

[0022] As a preferred technical solution of this application, a device groove is provided on the outer side of the upper support, the top mounting block is located on the inner side of the device groove, a sliding hole is provided on the inner side of the second connecting shaft, the movable shaft and the pressure spring are located on the inner side of the sliding hole, and the bottom of the movable shaft.

[0023] By adopting the above technical solution, while the first connecting shaft swings, the positions of the first magnet and the second magnet shift. At this time, the magnetic attraction between the first magnet and the second magnet is released. When the swing amplitude is too large, the pressure spring is compressed by the squeezing between the locking block and the sliding locking hole. At this time, the distance between the first connecting shaft and the second connecting shaft increases, so that the upper support and the lower support can move stably during the earthquake.

[0024] As a preferred technical solution of this application, the card block is located inside the card slot, the pressure spring is located inside the second connecting shaft, the surfaces of the first magnet and the second magnet adjacent to each other are of the S and N classes, and multiple connecting bolts are installed on the top inner side of the upper support.

[0025] By adopting the above technical solution, this seismic isolation device can be quickly installed and unloaded on the steel corridor through the bolt connection between the upper and lower sleeves, which facilitates subsequent replacement and maintenance. The connecting bolts connect the upper and lower supports and the steel plate partition, allowing for partial replacement.

[0026] The beneficial effects of this application are:

[0027] 1. In this utility model, when a steel connecting corridor equipped with this seismic isolation device encounters strong winds, especially when the bottom is subjected to an upward blowing force, the top mounting block of the upper support is connected to the bottom mounting block of the lower support through the first and second connecting shafts, increasing the vertical tension between the two. The first magnet on the outside of the first connecting shaft and the second magnet on the inside of the bottom mounting block generate magnetic attraction, preventing the upper and lower supports from separating. The bottom locking block of the movable shaft engages with the sliding locking hole to limit the movement and prevent the two connecting shafts from detaching. The pressure spring maintains the limit with its elasticity, ensuring the stability of the vertical structure and the normal movement of the device. During an earthquake, the upper and lower supports counteract the shaking by shifting their internal structures. The rotating shaft ball causes the two connecting shafts to swing with the shaking. At this time, the positions of the two magnets shift, and the magnetic attraction is released. When the swing amplitude is too large, the pressure spring is compressed, and the distance between the two connecting shafts increases, ensuring the stable movement of the upper and lower supports. This avoids the separation of the internal structure of the seismic isolation device, which would reduce the internal friction and reduce the effect, thus avoiding economic losses caused by safety accidents.

[0028] 2. In this utility model, the upper sleeve and lower sleeve of the vibration isolation device are connected by bolts, which can be quickly installed and removed on the steel corridor, facilitating subsequent replacement and maintenance. The connecting bolts connect the upper support, lower support and steel plate partition, which can realize targeted partial replacement to save costs. Attached Figure Description

[0029] Figure 1 This is a perspective view of the main structure of a replaceable and adjustable combined seismic isolation device for steel corridors proposed in this utility model.

[0030] Figure 2This is a three-dimensional structural breakdown view of a replaceable and adjustable combined seismic isolation device for steel corridors proposed in this utility model.

[0031] Figure 3 This utility model presents a three-dimensional disassembled view of the anti-pull-out mechanism of a replaceable and adjustable combined seismic isolation device for steel corridors.

[0032] Figure 4 for Figure 3 Enlarged view of point A in the image;

[0033] Figure 5 This is a cross-sectional view of the first connecting shaft and the second connecting shaft in a replaceable and adjustable combined seismic isolation device for steel corridors proposed in this utility model.

[0034] In the diagram: 1. Upper support; 2. Pull-out mechanism; 201. First connecting shaft; 202. Rotating shaft ball; 203. Slot; 204. Movable shaft; 205. Pressure spring; 206. First magnet; 207. Locking block; 208. Second connecting shaft; 209. Bottom mounting block; 210. Top mounting block; 211. Magnet placement slot; 212. Second magnet; 3. Lower support; 4. Device slot; 5. Support body; 6. Upper sleeve; 7. Connecting bolt; 8. Steel plate partition; 9. Lower sleeve. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] Reference Figure 1-5A replaceable and adjustable combined seismic isolation device for steel connecting corridors includes an upper support 1 and an anti-pull-out mechanism 2. The anti-pull-out mechanism 2 is located at the bottom of the upper support 1 and includes a first magnet 206, a second magnet 212, and a rotating shaft ball 202. The second magnet 212 is located at the bottom of the first magnet 206, and the rotating shaft ball 202 is located outside the first magnet 206 and the second magnet 212. The first magnet 206 applies a traction force to the second magnet 212, and the rotating shaft ball 202 releases the traction force between the first magnet 206 and the second magnet 212. The anti-pull-out mechanism 2 also includes a first connecting shaft 2. 01. The top of the first connecting shaft 201 is fixedly connected to the rotating shaft ball 202. A top mounting block 210 is rotatably connected to the outer side of the rotating shaft ball 202. Multiple slots 203 are provided on the outer side of the first connecting shaft 201. A movable shaft 204 is fixedly connected to the bottom of the first connecting shaft 201. A pressure spring 205 is sleeved on the outer side of the movable shaft 204. A first magnet 206 is installed on the outer side of the first connecting shaft 201. A locking block 207 is slidably connected to the top of the first magnet 206. A second connecting shaft 208 is slidably connected to the outer side of the first connecting shaft 201. The top of the movable shaft 204 is a cylindrical shaft. 4. The top is a cylindrical shaft, and the bottom is a cylindrical locking block 207 with a larger diameter and lower height. The bottom of the second connecting shaft 208 is fixedly connected to another rotating shaft ball 202. The outer side of the other rotating shaft ball 202 is rotatably connected to a bottom mounting block 209. The inner side of the bottom mounting block 209 is provided with a magnet mounting groove 211. The second magnet 212 is located inside the magnet mounting groove 211. Multiple upper sleeves 6 are provided on the inner side of the upper support 1. A steel plate partition 8 is installed at the bottom of the upper support 1. The support body 5 is provided on the outer side of the bottom of the steel plate partition 8. Another steel plate partition 8 is provided on the inner side of the bottom of the support body 5. Another steel plate partition 8 has a lower support 3 installed at the bottom, and a lower sleeve 9 is provided on the inner side of the lower support 3. A device groove 4 is opened on the outer side of the upper support 1. The top mounting block 210 is located on the inner side of the device groove 4. A sliding locking hole is opened on the inner side of the second connecting shaft 208. The movable shaft 204 and the pressure spring 205 are located on the inner side of the sliding locking hole. At the bottom of the movable shaft 204, the locking block 207 is located on the inner side of the locking groove 203. The pressure spring 205 is located on the inner side of the second connecting shaft 208. The adjacent surfaces of the first magnet 206 and the second magnet 212 are of the S and N grades. Multiple connecting bolts 7 are installed on the inner side of the top of the upper support 1.

[0037] During installation, when the steel connecting corridor equipped with this seismic isolation device encounters strong winds, the wind blows the steel connecting corridor irregularly, especially when it blows upwards from the bottom. The top mounting block 210 on the inner side of the upper support 1 is connected to the bottom mounting block 209 on the inner side of the lower support 3 through the first connecting shaft 201 and the second connecting shaft 208, which increases the tension in the vertical direction of the upper support 1 and the lower support 3. There is a first magnet 206 on the outer side of the first connecting shaft 201 and a second magnet 212 on the inner side of the bottom mounting block 209. The magnetic attraction between the first magnet 206 and the second magnet 212 prevents the steel connecting corridor from being blown away by the wind, causing the upper support 1 and the lower support 3 to separate. This ensures the vertical structural stability of the upper support 1 and the lower support 3, and allows the seismic isolation device to move normally.

[0038] Reference Figure 1-3 The movable shaft 204 is limited by engaging with the sliding hole through the locking block 207 at its bottom, preventing the first connecting shaft 201 from disengaging from the second connecting shaft 208. There is a pressure spring 205 between the locking block 207 and the sliding hole, and the pressure spring 205 maintains the locking block 207 and the sliding hole in a limited state through its elastic force.

[0039] Reference Figure 1-3 During an earthquake, the upper support 1 and the lower support 3 need to shift to each other through the internal structure of the support body 5 to resist the earthquake shaking. At this time, the rotating shaft ball 202 rotates with the top mounting block 210 and the bottom mounting block 209 respectively, causing the first connecting shaft 201 and the second connecting shaft 208 to swing in the direction of shaking.

[0040] Reference Figure 2-4 When the first connecting shaft 201 swings, the positions of the first magnet 206 and the second magnet 212 shift, the magnetic attraction is released, the swing amplitude is too large, the pressure spring 205 is compressed by the pressure of the locking block 207 and the sliding locking hole, the distance between the first connecting shaft 201 and the second connecting shaft 208 increases, so that the upper support 1 and the lower support 3 move stably during the earthquake.

[0041] Working principle: When a steel connecting corridor equipped with this seismic isolation device encounters strong winds, especially when the wind blows the steel connecting corridor in an irregular direction, from bottom to top, the top mounting block 210 on the inner side of the upper support 1 is connected to the bottom mounting block 209 on the inner side of the lower support 3 via the first connecting shaft 201 and the second connecting shaft 208. This increases the vertical tension between the upper support 1 and the lower support 3. A first magnet 206 is installed on the outer side of the first connecting shaft 201, and the bottom mounting block... A second magnet 212 is provided on the inner side of 209. This, combined with the magnetic attraction between the first magnet 206 and the second magnet 212, prevents the upper support 1 and lower support 3 from easily separating when the steel connecting corridor is blown by the wind. To ensure the vertical structural stability between the upper support 1 and lower support 3 while allowing the vibration isolation device to move normally, the movable shaft 204 is limited by the engagement of its bottom locking block 207 with the sliding locking hole, preventing the first connecting shaft 201 from separating from the second connecting shaft 206. The upper support 1 and the lower support 3 are separated by a pressure spring 205 between the locking block 207 and the sliding locking hole. The pressure spring 205 maintains the locking block 207 and the sliding locking hole in a limited state through its own elastic force. During an earthquake, the upper support 1 and the lower support 3 need to be offset by the mutual displacement of the internal structure of the support body 5 to counteract the shaking caused by the earthquake. At this time, the rotation of the rotating shaft ball 202 with the top mounting block 210 and the bottom mounting block 209 respectively allows the first connecting shaft 201 and the second connecting shaft 208 to swing in the direction of the shaking. While the first connecting shaft 201 swings, the positions of the first magnet 206 and the second magnet 212 are offset. At this time, the magnetic attraction between the first magnet 206 and the second magnet 212 is released. When the swing amplitude is too large, the pressure spring 205 is compressed by the squeezing between the locking block 207 and the sliding locking hole. At this time, the distance between the first connecting shaft 201 and the second connecting shaft increases, so that the upper support 1 and the lower support 3 can move stably during an earthquake.

[0042] This seismic isolation device can be quickly installed and removed on the steel corridor by means of bolted connection between the upper sleeve 6 and the lower sleeve 9, which facilitates subsequent replacement and maintenance. The connecting bolts 7 connect the upper support, the lower support and the steel plate partition 8, which can be partially replaced.

[0043] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A replaceable and adjustable combined isolation device for steel corridor, comprising an upper support (1) and a pullout resistance mechanism (2), characterized in that: The pull-out mechanism (2) is located at the bottom of the upper support (1); The pull-out mechanism (2) includes a first magnet (206), a second magnet (212), and a rotating ball (202). The second magnet (212) is disposed at the bottom of the first magnet (206), and the rotating ball (202) is disposed on the outside of the first magnet (206) and the second magnet (212). The first magnet (206) is used to apply a traction force to the second magnet (212), and the rotating ball (202) is used to release the traction force between the first magnet (206) and the second magnet (212).

2. A replaceable and adjustable combined isolation device for steel corridor according to claim 1, characterized in that: The anti-pull mechanism (2) further includes a first connecting shaft (201), the top of the first connecting shaft (201) is fixedly connected to the rotating shaft ball (202), the outer side of the rotating shaft ball (202) is rotatably connected to a top mounting block (210), the outer side of the first connecting shaft (201) is provided with multiple slots (203), and the bottom of the first connecting shaft (201) is fixedly connected to a movable shaft (204).

3. A replaceable and adjustable combined isolation device for steel corridor according to claim 2, characterized in that: A pressure spring (205) is sleeved on the outside of the movable shaft (204), a first magnet (206) is installed on the outside of the first connecting shaft (201), a locking block (207) is slidably connected to the top of the first magnet (206), a second connecting shaft (208) is slidably connected to the outside of the first connecting shaft (201), the top of the movable shaft (204) is a cylindrical shaft, and the bottom of the top of the movable shaft (204) is a cylindrical locking block (207) with a larger diameter and a lower height.

4. A replaceable and adjustable combined isolation device for steel corridor according to claim 3, characterized in that: The bottom of the second connecting shaft (208) is fixedly connected to another rotating shaft ball (202), and the outer side of the other rotating shaft ball (202) is rotatably connected to a bottom mounting block (209). The inner side of the bottom mounting block (209) is provided with a magnet mounting groove (211), and the second magnet (212) is located inside the magnet mounting groove (211).

5. A replaceable and adjustable combined isolation device for steel gallery according to claim 1, characterized in that: The upper support (1) is provided with multiple upper sleeves (6) on its inner side. A steel plate partition (8) is installed at the bottom of the upper support (1). A support body (5) is provided on the outer side of the bottom of the steel plate partition (8). Another steel plate partition (8) is provided on the inner side of the bottom of the support body (5). A lower support (3) is installed at the bottom of the other steel plate partition (8). A lower sleeve (9) is provided on the inner side of the lower support (3).

6. A replaceable and adjustable combined isolation device for steel gallery according to claim 1, characterized in that: The upper support (1) has a device groove (4) on its outer side, the top mounting block (210) is located inside the device groove (4), the second connecting shaft (208) has a sliding hole on its inner side, the movable shaft (204) and the pressure spring (205) are located inside the sliding hole, and the bottom of the movable shaft (204).

7. A replaceable and adjustable combined isolation device for steel corridor according to claim 3, characterized in that: The card block (207) is located inside the card slot (203), the pressure spring (205) is located inside the second connecting shaft (208), the surfaces of the first magnet (206) and the second magnet (212) are S and N respectively, and multiple connecting bolts (7) are installed on the top inner side of the upper support (1).

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