A pull-out resistance device

Abstract

This invention relates to the field of building structure technology, specifically to an anti-pull-out device. It includes an upper anchor, an upper sliding plate assembly, a hydraulic damper, a lower anti-pull-out assembly, a lower sliding plate assembly, and a lower anchor. The hydraulic damper's cylinder has an upper end cap sealed at one end and a lower end cap sealed at the other. A piston and a stiffness-adjustable medium are slidably disposed within the cylinder. An external pressure control component, capable of flowing from bottom to top, is embedded in the upper end cap, and a built-in pressure control component, capable of flowing from top to bottom, is embedded in the piston. This invention solves the problem of vertical gaps appearing in the anti-pull-out device due to reduced installation height, leading to impact loads and device or structural damage during tensile testing.

Description

Technical Field

[0001] This invention relates to the field of building structure technology, and more specifically to an anti-pull-out device. Background Technology

[0002] Pull-out resistance devices are a type of passive damping device with vertical tensile strength, and are widely used in the field of structural damping for bridges, buildings, large steel structures, and other applications.

[0003] The basic working principle of the anti-pull-out device is to restrict the originally moving unit to the design direction by means of structural locking and limiting, thereby enhancing the structure's anti-overturning ability and reducing the damage to the structure caused by large loads such as earthquakes and strong winds.

[0004] In existing technologies, pull-out protection devices all have vertical tensile strength, but several problems that arise under long-term working conditions have not been effectively solved:

[0005] 1. The vertical gap in the anti-pull-out device caused by creep and height reduction of the rubber bearing in the seismic isolation layer or settlement of other structural facilities leads to impact loads during the anti-pull-out device's tensile stress, resulting in structural or device failure.

[0006] Second, when the tensile strength device is subjected to structural loads, the upper and lower components are not parallel to each other and there is a certain angular change, which reduces the contact area of ​​the tensile strength components and affects the tensile strength effect.

[0007] 3. The horizontal displacement of the tensile device is insufficient, and the component size is too large. Summary of the Invention

[0008] The purpose of this invention is to address the shortcomings of existing technologies by providing an anti-pull-out device that can solve the problem of vertical gaps appearing in the anti-pull-out device due to reduced installation height, which leads to impact loads during tensile testing and subsequent device or structural damage.

[0009] This invention provides an anti-pull-out device, comprising an upper anchor, an upper sliding plate assembly, a hydraulic buffer, a lower tensile component, a lower sliding plate assembly, and a lower anchor. The top of the upper sliding plate assembly is fixedly connected to the upper anchor, and the bottom of the lower sliding plate assembly is fixedly connected to the lower anchor. The bottom of the hydraulic buffer is connected to the lower tensile component. One end of the hydraulic buffer is slidably connected to the upper sliding plate assembly, and the other end is slidably connected to the lower sliding plate assembly via the lower tensile component. An upper end cover is sealed at one end of the cylinder of the hydraulic buffer, and a lower end cover is sealed at the other end. A piston and a stiffness-adjustable medium filled in the cylinder are slidably disposed within the cylinder. The stiffness-adjustable medium includes an upper stiffness-adjustable medium located between the upper end cover and the top surface of the piston, and a lower stiffness-adjustable medium located between the bottom surface of the piston and the lower end cover. An external pressure control component that can be connected from the bottom to the top is embedded in the upper end cover, and a built-in pressure control component that can be connected from the top to the bottom is embedded in the piston.

[0010] Preferably, the bottom of the hydraulic buffer is connected to the lower tensile component via a ball joint.

[0011] Preferably, the piston has a piston rod extending from the bottom to the cylinder body at its center, the bottom end of the piston rod has a ball head, and the lower tensile assembly has a ball socket at its center that mates with the ball head.

[0012] Preferably, the upper sliding plate assembly has sliding grooves on both sides of its bottom, the hydraulic buffer has an upper tensile plate on its top, and one or more upper sliding friction pairs are symmetrically arranged on both sides of the upper tensile plate, the upper sliding friction pairs being slidably engaged with the sliding grooves.

[0013] Preferably, the upper end face of the cylinder body is fixedly connected to the bottom surface of the upper tensile plate, and an oil storage groove is provided between the upper tensile plate and the upper end cover.

[0014] Preferably, the external pressure control component and / or the internal pressure control component is a one-way valve.

[0015] Preferably, the lower tensile component includes a lower tensile plate, a bearing plate, and a lower sliding friction pair. The lower tensile plate is fixedly connected to the bearing plate located below it. A ball socket is provided at the center of the lower tensile plate and the bearing plate. One or more sets of lower sliding friction pairs are provided on both sides of the lower tensile plate and the bearing plate. The lower sliding friction pairs are slidably engaged with the groove of the lower sliding plate component.

[0016] Preferably, the starting pressure of the external pressure control component is greater than the starting pressure of the internal pressure control component.

[0017] Preferably, the maximum horizontal cross-section of the ball socket is located on the contact surface between the lower tensile plate and the bearing plate.

[0018] Preferably, the lower end cover is provided with a pressure valve for pressurizing the inside of the cylinder.

[0019] The beneficial effects of this invention are as follows:

[0020] 1. This device employs a hydraulic damper capable of unidirectional limiting, resolving the problem of vertical gaps in the anti-pull-out device caused by reduced installation height (creep of the rubber bearings in the seismic isolation layer or other reasons), leading to impact loads and subsequent device or structural damage during tensile testing. It is particularly suitable for passive vibration control in large-scale civil engineering projects, including bridges, buildings, and large steel structures in seismic applications. Furthermore, this device can also be installed in reverse to achieve the anti-pull-out function, offering flexible installation options.

[0021] 2. The hydraulic buffer's cylinder contains a piston and an adjustable stiffness medium. The adjustable stiffness medium includes an upper adjustable stiffness medium located between the upper end cover and the top surface of the piston, and a lower adjustable stiffness medium located between the bottom surface of the piston and the lower end cover. An external pressure control component, operable from bottom to top, is embedded in the upper end cover, and a built-in pressure control component, operable from top to bottom, is embedded in the piston. This structure achieves unidirectional limiting of the hydraulic buffer, thereby enabling vertical tensile strength and adaptive installation height reduction. The adjustable stiffness allows for adjustment of the pull-out device's stiffness, facilitating different stiffness design requirements.

[0022] 3. The starting pressure of the external pressure control component is greater than that of the internal pressure control component, which helps to ensure that the lower chamber with adjustable stiffness is filled with medium.

[0023] 4. The ball-head connection structure solves the problem of device jamming caused by the non-parallelism of the upper and lower anchor plates. The size of the pull-out device's angle is controlled by the gap between the ball-head piston rod and the mounting hole of the lower tension plate, effectively preventing the angle from being too large or too small. The spherical structure of the lower tension component consists of two parts: a lower tension plate and a bearing plate. The largest diameter of the sphere is located at the dividing joint, facilitating processing and installation.

[0024] 5. The pull-out device uses vertical sliding tracks for both upward and downward movement, which facilitates horizontal sliding. The upper and lower anchors of the pull-out device are bolted to the device body for easy replacement. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0026] Figure 2 This is a half-sectional schematic diagram of the present invention;

[0027] Figure 3 This is a half-sectional schematic diagram of the hydraulic buffer of the present invention;

[0028] Figure 4 This is a half-sectional schematic diagram of the tensile component of the present invention.

[0029] In the diagram: 1. Upper anchor, 2. Upper sliding plate assembly, 3. Hydraulic buffer, 3-1. Upper tensile plate, 3-2. External pressure control assembly, 3-3. Upper end cover, 3-4. Stiffness adjustable medium, 3-5. Piston, 3-6. Built-in pressure control assembly, 3-7. Lower end cover, 3-8. Piston rod, 3-9. Cylinder body, 3-11. Oil groove, 3-10. Upper sliding friction pair, 3-12. Pressure valve, 4. Lower tensile assembly, 4-1. Lower tensile plate, 4-2. Bearing plate, 4-3. Lower sliding friction pair, 4-4. Bolt, 5. Lower sliding plate assembly, 6. Lower anchor. Detailed Implementation

[0030] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0031] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0032] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0034] References to "one embodiment" or "some embodiments" in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized. "A plurality" means "two or more."

[0035] Example 1

[0036] Figure 1 , 2 A schematic diagram of an anti-pull-out device according to a preferred embodiment of this application is shown. For ease of explanation, only the parts relevant to this embodiment are shown, and the details are as follows:

[0037] A pull-out resistant device includes an upper anchor 1, an upper sliding plate assembly 2, a hydraulic buffer 3, a lower tensile component 4, a lower sliding plate assembly 5, and a lower anchor 6. The top of the upper sliding plate assembly 2 is fixedly connected to the upper anchor 1 by bolts, and the bottom of the lower sliding plate assembly 5 is fixedly connected to the lower anchor 6 by bolts. The bottom of the hydraulic buffer 3 is connected to the lower tensile component 4. One end of the hydraulic buffer 3 is slidably connected to the upper sliding plate component 2, and the other end is slidably connected to the lower sliding plate component 5 through the lower tensile component 4. One end of the cylinder 3-9 of the hydraulic buffer 3 is sealed with an upper end cover 3-3, and the other end is sealed with a lower end cover 3-7. A piston 3-5 and a stiffness-adjustable medium 3-4 filled in the cylinder 3-9 are slidably arranged inside the cylinder 3-9. The stiffness-adjustable medium 3-4 includes an upper stiffness-adjustable medium located between the upper end cover 3-3 and the top surface of the piston 3-5 and a lower stiffness-adjustable medium located between the bottom surface of the piston 3-5 and the lower end cover 3-7. An external pressure control component 3-2 that can be connected from the bottom to the top is embedded in the upper end cover 3-3, and a built-in pressure control component 3-6 that can be connected from the top to the bottom is embedded in the piston 3-5.

[0038] like Figure 3 As shown, in one embodiment, the hydraulic buffer 3 is constructed including an upper tensile plate 3-1, an external pressure control component 3-2, an upper end cover 3-3, a stiffness adjustable medium 3-4, a piston 3-5, an internal pressure control component 3-6, a lower end cover 3-7, a piston rod 3-8, a cylinder 3-9, an upper sliding friction pair 3-10, an oil reservoir 3-11, and a pressure valve 3-12.

[0039] In one embodiment, the bottom of the hydraulic buffer 3 is connected to the lower tensile assembly 4 via a ball joint. The piston 3-5 has a piston rod 3-8 extending from the bottom to the outside of the cylinder 3-9 at its center, and the bottom end of the piston rod 3-8 has a ball head. The lower tensile assembly 4 has a ball socket at its center that mates with the ball head.

[0040] In one embodiment, the upper sliding plate assembly 2 has sliding grooves on both sides of its bottom, the hydraulic buffer 3 has an upper tensile plate 3-1 on its top, and three sets of upper sliding friction pairs 3-10 are symmetrically arranged on both sides of the upper tensile plate 3-1. The upper sliding friction pairs 3-10 are slidably engaged with the sliding grooves.

[0041] In one embodiment, the upper end face of the cylinder body 3-9 is fixedly connected to the bottom surface of the upper tensile plate 3-1, and an oil storage groove 3-11 is provided between the upper tensile plate 3-1 and the upper end cover 3-3.

[0042] In one embodiment, the external pressure control component 3-2 and / or the internal pressure control component 3-6 are check valves, which can be selected from commercially available mature check valve products that are pressure-activated.

[0043] like Figure 4 As shown, the lower tensile component 4 includes a lower tensile plate 4-1, a bearing plate 4-2, a lower sliding friction pair 4-3, and bolts 4-4. The lower tensile plate 4-1 and the bearing plate 4-2 are connected by bolts 4-4, and the lower sliding friction pair 4-3 is distributed at the contact points between the lower tensile component 4 and other components.

[0044] In one embodiment, the lower tensile component 4 includes a lower tensile plate 4-1, a bearing plate 4-2, and a lower sliding friction pair 4-3. The lower tensile plate 4-1 is fixedly connected to the bearing plate 4-2 located below it. A ball socket is provided at the center of the lower tensile plate 4-1 and the bearing plate 4-2. Three sets of lower sliding friction pairs 4-3 are provided on both sides of the lower tensile plate 4-1 and the bearing plate 4-2. The lower sliding friction pairs 4-3 are slidably engaged with the groove of the lower sliding plate component 5.

[0045] In one embodiment, the starting pressure of the external pressure control component 3-2 is greater than the starting pressure of the internal pressure control component 3-6.

[0046] In one embodiment, the maximum horizontal cross-section of the ball socket is located on the contact surface between the lower tensile plate 4-1 and the bearing plate 4-2.

[0047] In one embodiment, the lower end cap 3-7 is provided with a pressure valve 3-12 for pressurizing the interior of the cylinder 3-9.

[0048] The working principle of this device is as follows:

[0049] 1) Vertical tensile principle: When the structure is pulled up and down, the upper anchor 1 directly transmits the force to the upper sliding plate assembly 2. The upper sliding plate assembly 2 acts on the hydraulic buffer 3. The upper stiffness adjustable medium inside the hydraulic buffer 3 is not under load, while the lower stiffness adjustable medium is compressed. Due to the unidirectional setting of the built-in pressure control assembly 3-6, the lower stiffness adjustable medium cannot pass through the built-in pressure control assembly 3-6. The medium volume remains unchanged, and the load is directly transmitted to the lower tensile assembly 4, the lower sliding plate assembly 5, and the lower anchor 6 to achieve tensile resistance.

[0050] 2) Adaptive Installation Height Reduction Principle: When the vertical installation space of the structure decreases, the upper anchor 1 squeezes the upper sliding plate assembly 2, which in turn squeezes the hydraulic buffer 3. The adjustable stiffness medium in the upper chamber of the hydraulic buffer 3 is subjected to load. At this time, the external pressure control assembly 3-2 and the internal pressure control assembly 3-6 open, and the adjustable stiffness medium in the upper chamber flows out. Part of it flows into the lower chamber of the cylinder to compensate for the increased volume of the lower chamber after the piston rod 3-8 enters the cylinder. The other part of the medium flows out of the external pressure control assembly 3-2 and is stored in the upper oil reservoir 3-11 of the upper end cover 3-3. It can be seen that by continuously squeezing out the adjustable stiffness medium in the upper chamber, it effectively adapts to the decrease in the height of the anti-pull-out device.

[0051] 3) Stiffness adjustment principle of the anti-pull-out device: The hydraulic buffer 3 is connected to the external medium injection equipment through the pressure valve 3-12 interface. The internal pressure of the stiffness adjustable medium 3-4 can be adjusted to adjust the stiffness of the medium and realize the stiffness adjustment of the device.

[0052] 4) Rotation principle: When the upper and lower anchor plates of the tensile device structure are not parallel, the piston rod 3-8 can rotate around the axis in the spherical space of the lower tensile component 4, so as not to cause jamming problems at the upper and lower tensile contact surfaces.

[0053] 5) Horizontal sliding principle: The sliding grooves of the upper sliding plate assembly 2 and the lower sliding plate assembly 5 are arranged perpendicularly to adapt to the need for multi-directional sliding in the plane.

[0054] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A pull-out resistant device, characterized in that: The system includes an upper anchor (1), an upper sliding plate assembly (2), a hydraulic buffer (3), a lower tensile assembly (4), a lower sliding plate assembly (5), and a lower anchor (6). The top of the upper sliding plate assembly (2) is fixedly connected to the upper anchor (1), the bottom of the lower sliding plate assembly (5) is fixedly connected to the lower anchor (6), the bottom of the hydraulic buffer (3) is connected to the lower tensile assembly (4), one end of the hydraulic buffer (3) is slidably connected to the upper sliding plate assembly (2), and the other end is slidably connected to the lower sliding plate assembly (5) through the lower tensile assembly (4). One end of the cylinder (3-9) of the hydraulic buffer (3) is sealed with an upper... An end cap (3-3) is provided at one end, and a lower end cap (3-7) is sealed at the other end. A piston (3-5) and a stiffness-adjustable medium (3-4) filled in the cylinder (3-9) are slidably provided inside the cylinder (3-9). The stiffness-adjustable medium (3-4) includes an upper stiffness-adjustable medium located between the upper end cap (3-3) and the top surface of the piston (3-5) and a lower stiffness-adjustable medium located between the bottom surface of the piston (3-5) and the lower end cap (3-7). An external pressure control component (3-2) that can be connected from the bottom to the top is embedded in the upper end cap (3-3), and an internal pressure control component (3-6) that can be connected from the top to the bottom is embedded in the piston (3-5). The hydraulic buffer (3) is provided with an upper tensile plate (3-1) at the top. The upper end face of the cylinder (3-9) is fixedly connected to the bottom surface of the upper tensile plate (3-1). An oil storage groove (3-11) is provided between the upper tensile plate (3-1) and the upper end cover (3-3). The external pressure control component (3-2) and / or the internal pressure control component (3-6) are one-way valves.

2. The anti-pull-out device according to claim 1, characterized in that: The bottom of the hydraulic buffer (3) is connected to the lower tensile component (4) via a ball joint.

3. The anti-pull-out device according to claim 2, characterized in that: The piston (3-5) has a piston rod (3-8) extending from the bottom to the outside of the cylinder (3-9) at its center. The bottom end of the piston rod (3-8) has a ball head, and the lower tensile assembly (4) has a ball socket that mates with the ball head at its center.

4. The anti-pull-out device according to claim 1, characterized in that: The upper sliding plate assembly (2) has sliding grooves on both sides of its bottom, and one or more sets of upper sliding friction pairs (3-10) are symmetrically arranged on both sides of the upper tensile plate (3-1). The upper sliding friction pairs (3-10) are slidably engaged with the sliding grooves.

5. The anti-pull-out device according to claim 1, characterized in that: The lower tensile component (4) includes a lower tensile plate (4-1), a bearing plate (4-2), and a lower sliding friction pair (4-3). The lower tensile plate (4-1) is fixedly connected to the bearing plate (4-2) located below it. A ball socket is provided at the center of the lower tensile plate (4-1) and the bearing plate (4-2). One or more sets of lower sliding friction pairs (4-3) are provided on both sides of the lower tensile plate (4-1) and the bearing plate (4-2). The lower sliding friction pairs (4-3) are slidably engaged with the groove of the lower sliding plate component (5).

6. The anti-pull-out device according to claim 1, characterized in that: The starting pressure of the external pressure control component (3-2) is greater than the starting pressure of the internal pressure control component (3-6).

7. The anti-pull-out device according to claim 5, characterized in that: The maximum horizontal cross section of the ball socket is located on the contact surface between the lower tensile plate (4-1) and the bearing plate (4-2).

8. The anti-pull-out device according to claim 1, characterized in that: The lower end cap (3-7) is provided with a pressure valve (3-12) for pressurizing the inside of the cylinder (3-9).

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