Assembly type earthquake displacement recording device

Abstract

The invention discloses a fabricated earthquake displacement recording device which can record horizontal and vertical displacement of a building in an earthquake at the same time. The device is mainly composed of a horizontal scale plate substrate, a vertical scale plate substrate, a scale plate and an ejector pin assembly. The horizontal scale plate base plate and the vertical scale plate base plate are fixed to a building through anchor bolt assemblies, and the levelness and perpendicularity of the horizontal scale plate base plate and the vertical scale plate base plate are ensured through adjusting gaskets. Scale marks are marked on the surface of the scale plate and used for recording displacement traces. The ejector pin assembly comprises an ejector pin, a spring, a pressure adjusting gasket and the like and is fixed to a building through an anchor bolt assembly, and the height can be adjusted to ensure that the ejector pin makes contact with the scale plate. And the front end of the ejector pin is made of a metal material with higher hardness, so that displacement marks can be left on the wear-resistant scale plate. The device has the advantages of being high in universality, easy to mount and dismount, reliable in structure, convenient to maintain, good in economical efficiency and the like, and is suitable for earthquake displacement monitoring of new and old buildings.

Description

Technical Field

[0001] This invention patent relates to the field of seismic isolation and damping equipment technology, specifically to an assemblable seismic displacement recording device. Background Technology

[0002] When an earthquake occurs, the foundation and the building itself inevitably undergo horizontal and vertical displacement under complex geological stress. This displacement is crucial for studying a building's performance during an earthquake, assessing its seismic resistance, and optimizing subsequent building structures. To accurately observe and record the building's displacement, some engineering projects install seismic displacement recording devices on the building during the construction process.

[0003] However, existing seismic displacement recording devices suffer from numerous inconveniences and limitations in installation. The installation process requires the installation of embedded parts during the pouring of concrete for the building, a step demanding precise construction positioning and strict process control. The seismic displacement recording device can only be installed on top of the embedded parts after the concrete has hardened and reached the required strength. Furthermore, the height of the installed seismic displacement recording device is fixed and cannot be flexibly adjusted according to actual needs or subsequent changes. This means that when components of the seismic displacement recording device need replacement due to damage, or when it needs to be removed for some special reason, destructive methods are often unavoidable. Such destructive removal not only damages the local structure of the building itself but also renders the seismic displacement recording device unusable, increasing equipment costs and maintenance difficulty. Even more problematic is that for buildings already constructed, the lack of pre-installed embedded parts and suitable installation conditions makes it impossible to install seismic displacement recording devices, which undoubtedly greatly limits the acquisition and analysis of data for seismic displacement monitoring of existing buildings.

[0004] On the other hand, existing seismic displacement recording devices have significant drawbacks in practical applications. Their structural design makes it difficult to easily adjust the distance between the needle tip and the dial. When the contact force between the needle tip and the dial is too large, it triggers a series of chain reactions. The increased friction and resistance from the excessive contact force severely impact the smoothness of the device's displacement recording process, significantly increasing the difficulty of recording displacement. In this situation, the device struggles to accurately capture minute displacement changes in buildings, leading to a large deviation between the recorded data and the actual displacement, greatly reducing recording accuracy and failing to provide reliable and accurate data support for earthquake research and building structural analysis. Conversely, if the contact force between the needle tip and the dial is too small, another problem arises. Due to insufficient contact force, the needle tip struggles to leave a clear and obvious mark on the dial when the building shifts. This could lead to missing or unclear displacement information records, which would seriously affect the accurate recording and subsequent analysis of seismic displacement data. As a result, the entire seismic displacement recording device would be unable to effectively play its due role at critical moments, greatly limiting its application value and practical effectiveness in fields such as earthquake monitoring and building safety assessment. Summary of the Invention

[0005] To address the aforementioned difficulties in installation and removal, and the inability to add such devices, the inventors, through research and development, proposed an assemblable seismic displacement recording device. This device completely avoids the requirement to install embedded parts during concrete pouring before installation. Related components can be fixed in a simple manner, and all components can be assembled on-site. It is easy to operate and adjustable, and can also be added to completed buildings. Whether horizontally or vertically, it can record the trajectory of the seismically isolated building's movement over time during the seismic cycle. Specifically, this invention is implemented as follows:

[0006] An assemblable seismic displacement recording device includes a horizontal scale plate base fixed to a building at its four corners by horizontal anchor bolt assemblies for leveling and fixed connection with the building; the horizontal scale plate is mounted flat on the base plate by screws along its edge, and scale lines are formed on its front surface for the horizontal pin assembly to leave displacement marks on the surface during displacement; the horizontal pin assembly is perpendicular to the upper part of the horizontal scale plate, with the pin pointing downwards towards the center of the horizontal scale plate, and is fixed to the building by pin anchor bolt assemblies and horizontal pin adjusting shims, and its height can be adjusted according to the site conditions to make the pin tip contact the horizontal scale plate; this allows the pin to generate contact displacement relative to the surface of the horizontal scale plate when displacement occurs.

[0007] Furthermore, a horizontal adjustment shim is fitted between the bolt of the horizontal anchor bolt assembly and the base plate surface. This shim allows adjustment of the perpendicularity between the horizontal scale plate base plate and the horizontal pin assembly, as well as the horizontality between the horizontal surfaces. The horizontal adjustment shim is positioned between the base plate surface and the building structure surface.

[0008] Furthermore, the horizontal ejector assembly includes: an ejector tip machined at the front end and threaded at the rear end, a connecting washer and a nut, which are installed as a whole in the ejector sleeve and extend from the front end hole of the ejector sleeve; the rear end of the ejector sleeve is threaded for screwing into the threaded front end of the ejector body for installation; the rear end of the ejector body is installed in the mounting sleeve through the provided thread and fastened by a locking nut; the mounting sleeve is mounted on the mounting base plate, which has mounting holes for inserting the anchor bolts of the ejector anchor bolt assembly and for fixing the mounting sleeve; a spring is placed in the ejector sleeve, with its front end pressing against the ejector washer; a pressure adjusting washer is provided between the ejector body and the ejector sleeve, and after assembly, the front end of the ejector body presses against the rear end of the spring, thereby providing ejector pressure and contacting the horizontal scale plate.

[0009] Furthermore, the ejector pin is made of metal, and the grid lines marked on the horizontal scale plate are made of wear-resistant organic material. The hardness of the metal material of the ejector pin exceeds the hardness of the surface of the horizontal scale plate, so that it can leave a trajectory on the horizontal scale plate during an earthquake.

[0010] Furthermore, the ejector body can compress the spring after the front end is screwed into the ejector sleeve, and the front end of the spring presses on the ejector washer, thereby transmitting the pressure generated by the spring compression to the ejector, providing the initial pressure for the ejector to contact the scale plate.

[0011] A pressure adjusting shim is added between the ejector body and the ejector sleeve to reduce the compression of the spring, thereby reducing the initial pressure.

[0012] Furthermore, the ejector assembly is height-adjustable, and the rear end of the ejector body is fully threaded, allowing it to be screwed into the mounting sleeve. The relative height of the ejector assembly can be adjusted by the depth of screwing.

[0013] Furthermore, a locking nut is provided at the front end of the mounting sleeve. After determining the screwing depth, the locking nut and the mounting sleeve are tightened together to lock the ejector pin body and restrict its axial movement.

[0014] Furthermore, the device also includes an upper structure installed on a building, the upper structure including a top surface and at least one side surface, the top surface being used to install a horizontal scale plate base, a horizontal scale plate and a horizontal pin assembly; the side surface being used to install a vertical scale plate base, a vertical scale plate and a vertical pin assembly; for recording vertical displacement generated during an earthquake.

[0015] Furthermore, the vertical scale plate base plate is fixed to the building at the four corners by vertical anchor bolt assemblies for adjusting verticality and for connection and installation with the side of the upper structure of the building.

[0016] A vertical scale plate is mounted on a vertical scale plate base plate by screws on its edge. Scale lines are made on its surface to leave displacement marks on the surface when the vertical ejector assembly is displaced.

[0017] The vertical ejector assembly is perpendicular to the vertical scale plate, with the ejector pins horizontally facing the center of the vertical scale plate. It is fixed to the building by the vertical ejector pin anchor assembly and the vertical ejector pin adjusting shims. It can adjust the distance relative to the ejector pin so that the pin tip contacts the vertical scale plate. It is used to generate contact displacement of the ejector pin relative to the surface of the vertical scale plate when displacement occurs.

[0018] Furthermore, a vertical adjustment shim is fitted between the bolt of the vertical anchor bolt assembly and the base plate surface, which can adjust the perpendicularity and horizontality between the vertical scale plate base plate and the vertical ejector assembly; the structure of the vertical ejector assembly is the same as that of the horizontal ejector assembly.

[0019] The working principle of this invention is as follows: This device can record displacement information in two dimensions, including a horizontal portion and a vertical portion. Horizontally: The horizontal scale plate base is fixed to the building via a horizontal anchor bolt assembly, ensuring the stability of the device. The horizontal scale plate is mounted on the base plate with screws, and its surface has scale lines for recording horizontal displacement. The horizontal pin assembly is fixed to the building via a pin anchor bolt assembly, and its height is adjustable so that its pin tip contacts the horizontal scale plate. Vertically: The vertical scale plate base is fixed to the side of the upper structure of the building via a vertical anchor bolt assembly, and it also has an adjustment function to ensure correct alignment with the vertical pin assembly. The vertical scale plate is mounted on the base plate, and its surface is also marked with scale lines. The vertical pin assembly is installed vertically, pointing towards the vertical scale plate, for recording vertical displacement. Both the horizontal and vertical pin assemblies include pins, springs, pressure adjusting shims, and other components. These components work together to ensure that the pins contact the scale plate with appropriate force. When an earthquake occurs, the building's displacement causes the accelerator pin to move relative to the scale plate, leaving displacement marks on the plate. The accelerator pin's tip is designed as a needle point and made of a material harder than the scale plate surface, ensuring accurate marking of the displacement trajectory. The scale lines on the plate are made of wear-resistant material to maintain clarity over a long period. Both the horizontal and vertical scale plate bases can be finely adjusted for level and verticality using appropriate shims to ensure accurate contact between the accelerator pin and the scale plate, improving measurement accuracy. The height of the accelerator pin assembly and the pressure of the accelerator pin can be adjusted by adjusting shims, the screw-in depth of the accelerator pin body, and locking nuts, ensuring stable recording of displacement data. During an earthquake, the building vibrates and displaces. The horizontal displacement of the building causes the horizontal accelerator pin assembly to move with the building. The accelerator pin tip makes contact displacement on the surface of the horizontal scale plate, leaving a mark, which is recorded by the scale lines on the horizontal scale plate. During an earthquake, the vertical displacement of a building causes the vertical jacking assembly to move. The jackings make contact displacement on the surface of the vertical scale plate, leaving a mark. The vertical displacement is recorded through the scale lines of the vertical scale plate. During an earthquake, the seismic forces acting on a building are a complex three-dimensional force system. Horizontal seismic forces cause the building to sway left and right or forward and backward, while vertical seismic forces may cause the building to bounce up and down. Recording both horizontal and vertical displacements can comprehensively reflect the spatial motion state of the building under seismic action. Horizontal displacement records can reveal the amplitude and frequency of the building's lateral (e.g., east-west or north-south) sway, which is crucial for assessing the building's lateral stability and shear resistance. Vertical displacement records can show the building's settlement or bounce in the vertical direction, which is of great significance for analyzing the seismic performance of the building's vertical load-bearing structures (e.g., columns, foundations).

[0020] Beneficial technical effects of the present invention:

[0021] (1) More versatile: Compared with existing seismic displacement recording devices, this device can be height adjusted according to the actual site space and can be installed in most seismic isolation buildings.

[0022] (2) Simple installation and disassembly, and more applicable: Compared with existing seismic displacement recording devices, this device does not require pre-embedded parts and can be fixed with only chemical anchors. It can be installed in both horizontal and vertical directions on buildings under construction or completed buildings. When disassembling, only the nuts of the chemical anchors need to be loosened, which will not damage the building.

[0023] (3) Simple and reliable structure: The device mainly adopts threaded connection and the processing technology is simple, strong and reliable.

[0024] (4) Simple maintenance: The device uses common materials and parts on the market, which are easy to manufacture, and each part can be disassembled and replaced individually.

[0025] (5) More economical: Compared with existing seismic displacement recording devices, this device has a simpler manufacturing process and can be mass-produced, reducing production costs. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of the structural configuration of an assemblable seismic displacement recording device according to the present invention;

[0027] Figure 2 This is an exploded structural diagram of an assemblable seismic displacement recording device according to the present invention;

[0028] Figure 3 This is an exploded three-dimensional structural diagram of the ejector pin assembly of the present invention;

[0029] Figure 4 This is a schematic diagram of the internal structure of the ejector assembly of the present invention;

[0030] in:

[0031] 1. Horizontal scale plate substrate,

[0032] 2 Horizontal anchor bolt assembly

[0033] 3. Horizontal scale plate

[0034] 4. Pin Anchor Assembly

[0035] 5. Horizontal ejector pin assembly, 5-1—Ejector pin, 5-2—Spring, 5-3—Ejector pin sleeve, 5-4—Pressure adjusting shim, 5-5—Ejector pin body, 5-6—Locking nut, 5-7—Mounting sleeve, 5-8—Mounting base plate;

[0036] 6 horizontal adjusting shims

[0037] 7. Leveling shims

[0038] 8. Superstructure

[0039] 11. Vertical scale plate substrate

[0040] 12 vertical scale plates

[0041] 13 Vertical pin anchor bolt assembly

[0042] 14 Vertical adjusting shims

[0043] 15 Vertical ejector assembly

[0044] 16 vertical adjustment shims;

[0045] 17. Vertical anchor bolt assembly. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0047] Example 1: An assemblable seismic displacement recording device, comprising the following structure:

[0048] The horizontal scale plate 3 is mounted on the horizontal scale plate base plate 1 by screws, and the horizontal scale plate base plate 1 is fixed to the building by the horizontal anchor bolt assembly 2 and the horizontal adjustment shim 7.

[0049] The horizontal pin assembly 5 is perpendicular to the horizontal scale plate 3 and is fixed to the building by the horizontal anchor bolt assembly 2 and the horizontal adjustment shim 7, with the pin tip in contact with the horizontal scale plate 3.

[0050] The horizontal scale plate 3 has graduated grid lines made of wear-resistant organic material, which can record the trajectory of a needle tip during an earthquake.

[0051] The horizontal scale plate base 1 and the horizontal pin assembly 5 can be installed on the building in both horizontal and vertical directions. Depending on actual needs, holes can be drilled in the building, and the horizontal anchor bolt assembly 2 can be inserted into these holes to fix it to the building. Corresponding holes on the horizontal scale plate base 1 and the horizontal pin assembly 5 can be passed through the horizontal anchor bolt assembly 2. The horizontality or verticality of the horizontal scale plate base 1 and the horizontal pin assembly 5 can be adjusted using the horizontal adjusting shims 7 before being fixed to the horizontal anchor bolt assembly 2, thus securing it to the building. The horizontal scale plate base 1 needs to be installed on the building's foundation support, and the horizontal pin assembly 5 needs to be installed on the building's upper structure 8. If disassembly is required later, simply loosen the horizontal anchor bolt assembly 2.

[0052] The horizontal ejector assembly 5 comprises: an ejector pin 5-1 made of a metal material with a certain hardness, with a needle tip at the front end and a threaded rear end, connecting a washer and a nut, allowing it to be inserted entirely into the ejector sleeve 5-3 and protrude from the front end hole of the ejector sleeve 5-3. A spring 5-2 is inserted into the ejector sleeve 5-3, with its front end pressing against the ejector washer. The rear end of the ejector sleeve 5-3 is threaded for the threaded front end of the ejector body 5-5 to be screwed in, and its front end presses against the rear end of the spring 5-2. After assembly, the spring 5-2 can be compressed. Because the front end of the spring 5-2 presses against the ejector washer, the pressure generated by the compression of the spring 5-2 is transmitted to the ejector pin 5-1, providing initial pressure. By adding a pressure adjusting shim 5-4 between the ejector body 5-5 and the ejector sleeve 5-3, the compression of the spring 5-2 can be reduced, thereby reducing the initial pressure. The pressure adjusting shim 5-4 can be selected according to actual needs. In actual use, if the ejector pin 5-1 is axially displaced, the spring 5-2 can act as a buffer, allowing the ejector pin 5-1 to slide axially in the ejector pin sleeve 5-3, and always providing an axial pressure to press the ejector pin 5-1 tightly onto the horizontal scale plate 3.

[0053] The rear end of the ejector body 5-5 is fully threaded, allowing it to be screwed into the mounting sleeve 5-7. The screwing depth can be adjusted on-site according to the actual space, thereby adjusting the height of the horizontal ejector assembly 5. The front end of the mounting sleeve 5-7 has a locking nut 5-6. After determining the screwing depth, tightening the locking nut 5-6 onto the mounting sleeve 5-7 will lock the ejector body 5-5 in place, preventing axial movement. After the entire assembly is complete, the ejector tip remains pressed firmly against the horizontal scale plate 3.

[0054] The mounting sleeve 5-7 is connected to the mounting base plate 5-8, which has mounting holes for fixing the horizontal anchor bolt assembly 2.

[0055] After installing a set of assemblable seismic displacement recording devices in the horizontal and vertical directions of the building, when an earthquake occurs, displacement occurs between the building's foundation and the superstructure 8. The needle tip then draws corresponding lines on the horizontal scale plate 3. This structure ensures that the needle tip always maintains appropriate force and acts on the scale plate surface, thus recording the trajectory of movement over time in the horizontal and vertical seismic cycles.

[0056] Example 2: Assembly Process

[0057] Horizontal installation

[0058] Mounting of horizontal scale plate substrate 1:

[0059] The installation location of the horizontal scale plate base plate 1 on the building is determined according to the design requirements, generally at a suitable horizontal plane, such as the ground floor of a certain floor or the surface of a specific horizontal structural beam. The bolts of the horizontal anchor bolt assembly 2 are passed through the mounting holes of the horizontal scale plate base plate 1, and a horizontal adjustment shim 7 is installed between the bolt and the base plate surface. The bolts are then inserted into the pre-drilled anchor bolt holes in the building and initially tightened with nuts, but not completely, to allow for subsequent adjustments to the horizontal and vertical alignment.

[0060] Installation of horizontal scale plate 3:

[0061] The edge of the horizontal scale plate 3 is installed flat on the horizontal scale plate base plate 1 with screws, ensuring a firm installation and a flat surface. During installation, a level can be used in conjunction with it. After placing the level, adjust the downward depth of the bolts in the horizontal anchor bolt assembly 2 so that the horizontal scale plate 3 can maintain a horizontal position after the four corners are engaged. The horizontal adjustment shim 7 can be compressed, so the depth range that can be adjusted is actually quite wide. The looser end is shallower, but it can ensure a tight installation. The tighter end is deeper, and the horizontal adjustment shim 7 is compressed more tightly. Moreover, the horizontal adjustment shim 7 can stabilize the horizontal scale plate 3. With the horizontal anchor bolt assembly 2, a suitable area on the building can be quickly found for direct assembly and use.

[0062] Horizontal ejector assembly 5 installation:

[0063] Assemble the horizontal ejector pin assembly 5: The front end of the ejector pin is a needle tip, and the rear end is connected to a washer and nut and then installed as a whole in the ejector pin sleeve, so that the ejector pin extends out of the front end hole of the ejector pin sleeve; the rear end of the ejector pin sleeve is screwed into the threaded engagement with the front end of the ejector pin body; the rear end of the ejector pin body is installed in the mounting sleeve by threads, a pressure adjusting washer is placed between the ejector pin body and the ejector pin sleeve, and a spring is placed in the ejector pin sleeve so that its front end presses on the ejector pin washer. At this time, the front end of the ejector pin body presses on the rear end of the spring, providing ejector pin pressure to contact the horizontal scale plate 3. Finally, the mounting sleeve is installed on the mounting base plate, and the mounting hole of the mounting base plate is used for the insertion of the anchor bolt of the ejector pin anchor bolt assembly 4.

[0064] The assembled horizontal ejector assembly 5 is fixed to the building by ejector anchor assembly 4 and horizontal ejector adjusting shim 6. The height is adjusted by adjusting the depth of the ejector body screwed into the installation sleeve according to the site conditions, so that the ejector tip contacts the horizontal scale plate 3. Then, the locking nut at the front end of the installation sleeve is tightened to the installation sleeve to lock the ejector body and restrict its axial movement.

[0065] During installation, the verticality between the horizontal scale plate base plate 1 and the horizontal ejector assembly 5, as well as the horizontality between the horizontal planes, can be finely adjusted using the horizontal adjustment shim 7. By observing the relative position and angle relationship between the ejector and the scale plate, it can be ensured that the ejector can make vertical and stable contact with the scale plate, thus guaranteeing measurement accuracy.

[0066] Vertical installation

[0067] Vertical scale plate substrate 11 mounting:

[0068] Determine the installation position of the vertical scale plate base plate 11 on the side of the upper structure 8 of the building. This position should accurately reflect the vertical displacement of the building and facilitate installation and observation.

[0069] The bolts of the vertical anchor bolt assembly 17 are passed through the mounting holes of the vertical scale plate base plate 11. A vertical adjustment shim 16 is installed between the bolt and the base plate surface. Then the bolts are inserted into the anchor bolt holes pre-drilled on the side of the upper structure 8 of the building. The nuts are then initially tightened.

[0070] Vertical scale plate 12 installation:

[0071] Align the edge of the vertical scale plate 12 with the vertical scale plate base plate 11, and use screws to install the vertical scale plate 12 on the vertical scale plate base plate 11 to ensure that the scale plate surface is flat and the scale is clearly visible.

[0072] Vertical ejector assembly 15 installation:

[0073] Since the vertical ejector assembly 15 has the same structure as the horizontal ejector assembly 5, it is assembled according to the assembly method of the horizontal ejector assembly 5.

[0074] The assembled vertical ejector pin assembly 15 is fixed to the building using the vertical ejector pin anchor assembly 13 and the vertical ejector pin adjusting shim 14. The distance between the ejector pin and the vertical scale plate 12 is adjusted so that the pin tip contacts the vertical scale plate 12. The verticality and horizontality between the vertical scale plate base plate 11 and the vertical ejector pin assembly 15 are adjusted using the vertical adjusting shim 16 to ensure accurate contact between the ejector pin and the vertical scale plate 12.

[0075] In this embodiment, the wall where the horizontal ejector assembly 5 and the vertical ejector assembly 15 are fixedly installed can be temporarily poured, using floor slabs or building frames.

Claims

1. An assemblable seismic displacement recording device, characterized in that... include: The horizontal scale plate base plate (1) is fixed to the building at the four corners by horizontal anchor bolt assemblies (2) for adjusting the level and for fixed connection with the building; A horizontal scale plate (3) is mounted on the horizontal scale plate base plate (1) by screws on its edge. Scale lines are made on the front surface so that the horizontal ejector assembly (5) can leave displacement marks on the surface when it is displaced. The horizontal ejector assembly (5) is perpendicular to the top of the horizontal scale plate (3). The ejector pins face downward toward the center of the horizontal scale plate (3). It is fixed to the building by the ejector pin anchor assembly (4) and the horizontal ejector pin adjusting shim (6). The height can be adjusted according to the site conditions so that the pin tip contacts the horizontal scale plate (3). It is used to generate contact displacement of the ejector pin relative to the surface of the horizontal scale plate (3) when displacement occurs.

2. The assemblable seismic displacement recording device according to claim 1, characterized in that, The horizontal anchor bolt assembly (2) is also fitted with a horizontal adjustment shim (7) between the bolt and the base plate surface. The verticality between the horizontal scale plate base plate (1) and the horizontal pin assembly (5) and the horizontality between the horizontal surfaces can be adjusted by the horizontal adjustment shim (7).

3. The assemblable seismic displacement recording device according to claim 1, characterized in that, The horizontal ejector pin assembly (5) includes: The ejector pin (5-1) has a needle tip machined at the front end and a threaded rear end. It is connected to a washer and a nut and is installed in the ejector pin sleeve (5-3) as a whole, and extends out from the front end hole of the ejector pin sleeve (5-3). The ejector sleeve (5-3) has a threaded rear end for screwing into the threaded front end of the ejector body (5-5) for installation. The ejector body (5-5) is installed in the mounting sleeve (5-7) by a threaded connection at its rear end and is secured by a lock nut (5-6); The mounting sleeve (5-7) is mounted on the mounting base plate (5-8). The mounting base plate (5-8) is provided with mounting holes for the insertion of the anchor bolts of the pin bolt assembly (4) and for fixing the mounting sleeve (5-7). Spring (5-2) is placed in ejector sleeve (5-3), with its front end pressing against ejector pad; A pressure regulating pad (5-4) is provided between the ejector body (5-5) and the ejector sleeve (5-3). After assembly, the front end of the ejector body (5-5) presses on the rear end of the spring (5-2), thereby providing ejector (5-1) pressure and contacting the horizontal scale plate (3).

4. The assemblable seismic displacement recording device according to claim 1, characterized in that, The pin (5-1) is made of metal, and the grid lines marked on the horizontal scale plate (3) are made of wear-resistant organic material. The hardness of the metal material of the pin (5-1) exceeds the hardness of the plate surface of the horizontal scale plate (3), so that it can draw a trajectory on the horizontal scale plate (3) during an earthquake.

5. The assemblable seismic displacement recording device according to claim 3, characterized in that, The ejector body (5-5) can compress the spring (5-2) after the front end is screwed into the ejector sleeve (5-3). The front end of the spring (5-2) presses on the ejector pad, thereby transmitting the pressure generated by the compression of the spring (5-2) to the ejector (5-1), providing the initial pressure for the ejector (5-1) to contact the horizontal scale plate (3). A pressure regulating shim (5-4) is added between the ejector body (5-5) and the ejector sleeve (5-3) to reduce the compression of the spring (5-2) and thus reduce the magnitude of the initial pressure.

6. The assemblable seismic displacement recording device according to claim 5, characterized in that, The horizontal ejector assembly (5) is height adjustable. The rear end of the ejector body (5-5) is fully threaded and can be screwed into the mounting sleeve (5-7). The relative height of the horizontal ejector assembly (5) can be adjusted by the depth of screwing.

7. The assemblable seismic displacement recording device according to claim 6, characterized in that, The front end of the mounting sleeve (5-7) is equipped with a locking nut (5-6). After determining the screwing depth, tightening the locking nut (5-6) and the mounting sleeve (5-7) together will lock the ejector body (5-5) and restrict its axial movement.

8. The assemblable seismic displacement recording device according to any one of claims 1-7, characterized in that, It also includes an upper structure (8) installed on the building, the upper structure (8) including a top surface and at least one side surface, the top surface being used to mount the horizontal scale plate base plate (1), the horizontal scale plate (3) and the horizontal ejector assembly (5); The side is used to mount the vertical scale plate base (11), the vertical scale plate (12), and the vertical pin assembly (15) for recording the vertical displacement generated during an earthquake.

9. The assemblable seismic displacement recording device according to claim 8, characterized in that, The vertical scale plate base plate (11) is fixed to the building at its four corners by vertical anchor bolt assemblies (17) for adjusting verticality and for connection and installation with the side of the upper structure (8) on the building. The vertical scale plate (12) is mounted on the vertical scale plate base plate (11) by screws on its edge. Scale lines are made on its surface so that the vertical ejector assembly (15) can leave displacement marks on the surface when it is displaced. The vertical ejector assembly (15) is perpendicular to the vertical scale plate (12), with the ejector pins horizontally facing the center of the vertical scale plate (12). It is fixed to the building by the vertical ejector pin anchor assembly (13) and the vertical ejector pin adjusting shim (14). It can adjust the distance relative to the ejector pin so that the pin tip contacts the vertical scale plate (12). It is used to generate contact displacement of the ejector pin relative to the surface of the vertical scale plate (12) when displacement occurs.

10. The assemblable seismic displacement recording device according to claim 8, characterized in that, The vertical anchor bolt assembly (17) is also fitted with a vertical adjustment shim (16) between the bolt and the base plate surface. The verticality and horizontality between the vertical scale plate base plate (11) and the vertical pin assembly (15) can be adjusted by the vertical adjustment shim (16). The vertical ejector assembly (15) has the same structure as the horizontal ejector assembly (5).

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