CN203782881U - Shock insulation support - Google Patents

Abstract

The utility model provides a shock-isolation support, which comprises a lower connecting steel plate including a bottom plate and a side wall, a shape memory alloy helical spring connected with a slider and the bottom plate, a slider, an upper cover plate, and an anti-pull baffle , PTFE coating and rubber cushion. The spherical groove of the slider coincides with the spherical protrusion of the lower stopper. At the same time, in order to ensure that the possible contact between the various parts of the support during the working process is a soft collision, the outer periphery of the short column and the lower surface of the lower stopper The rubber cushion is set, and the coil spring adopts superelastic shape memory alloy, which makes the device easy to self-reset after the earthquake, and the shape memory alloy coil spring has superelastic hysteresis, which greatly improves the overall energy consumption level of the support device . The shock-isolation bearing provided by the utility model has simple structure, good shock-isolation control effect and durability, strong practicability, and can realize self-resetting.

Description

a shock absorber

technical field

The utility model relates to a shock-isolation bearing, which belongs to the technical field of shock-absorbing or shock-isolation of engineering structures.

Background technique

Earthquake is a natural disaster, and its huge effect is often the main factor leading to the damage or even collapse of engineering structures in earthquake areas. Modern civil engineering is a place to accommodate a large number of people and social wealth. Reasonable technical measures are adopted to reduce the seismic response of the engineering structure and improve the seismic performance of the structure, thereby effectively ensuring the seismic safety and applicability of the structure itself. Therefore, the seismic isolation theory And application devices came into being.

Seismic isolation is an early development of passive control measures. A large number of theoretical studies, model tests and actual engineering strong earthquake observation records show that seismic isolation can greatly reduce the seismic response of engineering structures. The principle of seismic isolation technology is to install a seismic isolation support between the structure itself and the ground or the lower supporting structure, and use the small horizontal stiffness of the seismic isolation support to prolong the vibration period of the structure, thereby reducing the dynamic force of the structural earthquake. Magnification effect. The seismic isolation system of engineering structures should have the following characteristics: bearing characteristics, seismic isolation characteristics, reset characteristics, energy dissipation characteristics, stability and durability.

The Chinese invention patent application document with the publication number CN103046662A discloses a soft contact limit structure of the shock-isolation layer, including a limiter, a buffer and a reaction force support. The limiter and the buffer are both elastic devices, which limit The stiffness of the stopper is greater than that of the buffer; one end of the stopper is fixed on the reaction support, the other end of the stopper is fixedly connected to one end of the buffer, and the other end of the buffer is connected to the upper floor of the shock-isolation layer. There is a reserved distance between the covers; the reaction support is connected with the lower part of the shock-isolation layer. When the earthquake causes a large lateral displacement of the isolation floor, the upper floor of the isolation floor collides with the buffer, causing the buffer and the limiter to deform. Since the buffer itself has a small The seismic layer brings a large impact, which avoids the damage to the building structure caused by the impact; at the same time, due to the large deformation and deformation stiffness of the stopper, it not only allows a certain amount of lateral displacement of the seismic isolation layer, but also prevents the It is controlled within a safe range.

At present, seismic isolation bearings have been widely used in building structures and bridge isolation, but the traditional isolation bearings have insufficient energy dissipation capacity and post-earthquake reset ability.

Shape memory alloy (Shape Memory Alloy, SMA) is a new type of functional material, which has unique shape memory effect, superelastic effect, excellent damping performance, fatigue resistance and corrosion resistance. The methods of shape memory alloy shock isolation include: (1) using the high damping characteristics and superelastic hysteretic properties of shape memory alloys to improve the energy dissipation capacity of the shock-isolation bearing; (2) using the superelastic effect of shape memory alloys to make the isolation The seismic bearing has self-resetting ability after an earthquake.

The existing shape memory alloy seismic isolation bearings for engineering structures either use small-diameter wires (1-2 mm in diameter) and laminated rubber pads to form composite bearings, that is, shape memory alloy composite bearings, or use shape memory alloy rods to combine to form seismic isolation Bearings, the above two bearings are not capable of providing large output force and large output displacement under the action of strong earthquakes. The rotation ability required by the corner of the upper structure, and the device cannot reset itself after an earthquake. Therefore, it is very necessary to develop a shock-isolation bearing that can use the superelastic performance of large-scale shape memory alloy devices for reset and has soft contact pull-out resistance. .

Utility model content

The purpose of the utility model is to propose a self-resetting seismic isolation support in order to overcome the disadvantage that the existing seismic isolation support cannot reset itself.

In order to achieve the above object, the utility model adopts the following technical solutions.

The utility model provides a shock-isolation bearing, which comprises a lower connecting steel plate, a slider, a coil spring, an anti-pull baffle and an upper cover plate; the upper cover plate includes an upper connecting steel plate and a lower stopper, and the upper connecting The steel plate is fixedly connected with the lower block; the lower connecting steel plate includes a bottom plate and a side wall, and the bottom plate and the side wall are fixedly connected as a whole; the slider includes an outer cylinder and a groove core block, and the The slider is arranged on the upper surface of the bottom connecting steel plate, the outer cylinder of the slider and the side wall of the lower connecting steel plate are connected by the coil spring; the pull-out baffle is arranged on the upper connecting steel plate In front of the lower block, and the anti-lift baffle includes the circular baffle and the short post, the circular baffle and the short post are fixedly connected as one, and the short post Pass through the lower block, and the other end of the short column is fixedly connected with the bottom plate of the lower connecting steel plate.

Preferably, the coil spring is made of shape memory alloy (SMA).

Preferably, in any of the above solutions, the slider slides on the bottom plate of the lower connecting steel plate.

Preferably, in any of the above solutions, a polytetrafluoroethylene coating is arranged on the horizontal surface of the bottom of the slider.

Preferably, in any of the above solutions, a rubber pad is arranged on the periphery of the short column.

Preferably, in any of the above schemes, a rubber pad is arranged on the lower surface of the pull-out baffle.

A rubber pad is arranged on the periphery of the stub and the lower surface of the lower block to avoid collision damage between the components of the device and to ensure soft contact with each other.

Preferably, in any of the above solutions, the two ends of the coil spring are linear, and the surface is engraved with threads.

Preferably, in any of the above solutions, the coil spring is connected to the outer cylinder and the side wall through a locking nut. The outer cylinder is provided with a mounting hole for the penetration of the shape memory alloy coil spring, the size of the mounting hole on the outer cylinder is determined according to the diameter of the shape memory alloy spring, and a lock nut of an appropriate size must also be selected to ensure Connection security.

Preferably, in any of the above solutions, the groove core block of the slider has a spherical depression.

Preferably, in any of the above solutions, the bottom of the lower stopper has a spherical protrusion.

Preferably, in any of the above schemes, the spherical diameter of the spherical protrusion at the bottom of the lower stopper is the same as the spherical diameter of the spherical depression of the groove core block, so that the two can fit together. The radian of the concave slider matches the arc of the spherical protrusion of the lower stop. Slide out from the shape slider.

Preferably, in any of the above schemes, the cross section of the short column is circular or rectangular.

Preferably, in any of the above solutions, the cross section of the outer cylinder of the slider is octagonal.

In any of the above schemes, it is preferred that there is a gap of 5-10mm between the upper surface of the lower stopper and the lower surface of the annular baffle, so as to avoid friction between the two when the contact is displaced horizontally At the same time, the gap should not be too large to prevent the stopper from being pulled out from the concave slider. When the upper cover plate moves upward as a whole, the lower stopper fully contacts with the annular baffle plate, which restricts the movement of the upper cover plate, thereby forming the ability to resist pulling out. In order to facilitate the replacement of the device, try to make the annular baffle break before the lower stopper during design. The diameter of the lower stopper is the maximum stroke of the slider in the horizontal direction, and the diameter of the lower stopper can be adjusted according to the design displacement and the pull-out resistance.

Preferably, in any of the above schemes, the slider is arranged with rubber and steel plate interlayers.

The planar shape of the lower stopper is "dial-shaped", that is, a circular disk with a certain circular hole arranged in the circumferential direction, and the short column is located in the hollow circular hole area between the "dial-shaped" lower stoppers, and the short column The column is arranged at the center of the hollow circular area of the lower stopper, that is, the center of the cross section of the short column coincides with the center of the hollow circular area of the lower stopper.

Compared with the prior art, the beneficial effect of the seismic isolation bearing of the present utility model is reflected in that the bearing is arranged between the main structure and the supporting member, and under the action of an earthquake in any horizontal direction, it is arranged between the upper part and the lower part of the structure. The horizontal relative movement occurs between the upper cover plate and the lower connecting steel plate, which reduces the horizontal stiffness of the structure, prolongs the structural period, and isolates the upward transmission of seismic energy; when the structure has a tendency to move upward, the structure will drive the upper cover. The plate produces an upward displacement, and when the lower stopper touches the circular baffle, the circular baffle will block its upward movement, so that the support has the ability to resist vertical displacement. In addition, on the one hand, the spherical protrusion of the upper cover plate drives the slider to slide horizontally on the bottom plate coated with PTFE friction material to realize frictional energy dissipation; The relative displacement drives the shape memory alloy coil spring to undergo stretching and compression deformation to realize the superelastic hysteretic energy consumption of the shape memory alloy material. The device realizes self-resetting, and a slight rotation can be generated between the lower stopper and the slider, thereby releasing the torsional stress of the structure.

In addition, the utility model adds a shape memory alloy coil spring, a polytetrafluoroethylene material friction layer, and a rubber pad layer to ensure soft contact to the traditional anti-lifting support, so that the support has a double energy consumption mechanism and self-resetting Function, and ensure that the contact between the various components of the device is soft collision to avoid damage to the support and ensure the safety of the device. The utility model has simple structure, good shock isolation control effect and durability, and strong practicability, and is suitable for buildings and bridges, especially for the space between the large-span space grid roof structure and the foundation or between the large-span space grid roof structure and the support Connections between the tops of structures, such as airports, exhibition halls with large spaces.

Description of drawings

Fig. 1 is a top view of an embodiment of the shock-isolation bearing according to the present invention, wherein only the upper cover plate is shown.

Fig. 2 is an A-A cross-sectional view of the embodiment shown in Fig. 1 of the shock-isolation bearing according to the present invention.

Fig. 3 is according to the bottom chute top view of the embodiment shown in Fig. 1 of the shock-isolation bearing of the present utility model.

Fig. 4 is a structural view of the lower block of the embodiment shown in Fig. 1 of the shock-isolation bearing according to the present invention.

Fig. 5 is a structural diagram of a shape memory alloy coil spring according to the embodiment shown in Fig. 1 of the shock-absorbing support of the present invention.

Fig. 6 is a structural diagram of the connection between the shape memory alloy coil spring and the outer cylinder according to the embodiment shown in Fig. 1 of the shock-absorbing support of the present invention.

The meanings of various symbols in the figure are as follows:

1: Lower connecting steel plate, 2: Shape memory alloy coil spring, 3: Slider, 4: Upper cover plate, 5: Upper connecting steel plate, 6: Lower stopper, 7: Pull-out baffle, 8: Ring stopper Plate, 9: short column, 10: rubber cushion, 11: outer cylinder, 12: grooved core block, 13: lock nut, 14: bottom plate, 15: side wall, 16: polytetrafluoroethylene coating, 17 : connection bolt, 18: hollow hole area, d: diameter of hollow hole area.

Detailed ways

In order to better understand the shock-isolation bearing provided by the utility model, the utility model will be further described below through specific implementation modes and in conjunction with the accompanying drawings.

Example 1

A shock-isolation support with an overall diameter of about 500mm, its top view is shown in Figure 1, and Figure 2 is an A-A sectional view of the embodiment shown in Figure 1, the support mainly includes: a bottom plate 14 and a side wall 15 The lower connecting steel plate 1, the shape memory alloy coil spring 2 connected with the slider 3 and the side wall 15, the slider 3, the upper cover plate 4, the polytetrafluoroethylene coating 16, the rubber pad 10 and the pull-out baffle 7 . The lower connecting steel plate 1 includes a bottom plate 14 and a side wall 15, the bottom plate 14 and the side wall 15 are fixedly connected as one, and the upper surface of the bottom plate 14 of the lower connecting steel plate 1 is a sliding surface; a slider 3 and a shape memory are arranged above the lower connecting steel plate 1 The alloy coil spring 2, the slider 3 includes an outer cylinder 11 and a groove core block 12, the outer cylinder 11 and the groove core block 12 are fixedly connected as one, and a polytetrafluoroethylene coating 16 is arranged on the horizontal surface of the bottom of the slider 3, and the sliding The outer cylinder 11 and the side wall 15 of the block 3 are connected by a lock nut 13 through a shape-memory alloy coil spring 2. The two ends of the shape-memory alloy coil spring 2 are straight lines and are engraved with threads; The lower block 6, and the upper connecting steel plate 5 and the lower block 6 are fixedly connected as one; the pull-out baffle 7 includes a circular baffle 8 and a short post 9, and the circular baffle 8 and the short post 9 are fixedly connected as One piece, and the short column 9 passes through the lower stopper 6, the short column 9 is fixedly connected with the bottom plate 14 of the lower connecting steel plate 1, and the pullout baffle 7 is arranged between the upper connecting steel plate 5 of the upper cover plate 4 and the lower stopper 6 , the lower stopper 6 is designed to have a spherical protrusion at the bottom, which coincides with the groove of the groove core block 12, so that the slider 3 can slide horizontally on the bottom plate 14 under the drive of the stopper 6, and at the same time, the lower stopper 6 A slight rotation can be generated between the sliding block 3 and can adapt to the corner requirement of the superstructure. In addition, a rubber pad 10 is provided on the periphery of the stub 9 and the lower surface of the lower block 6 to avoid damage to the support and the upper structure during the collision.

The main structure and characteristics of each component are described as follows:

The upper cover plate 4 includes an upper connecting steel plate 5 and a lower stopper 6, and the upper connecting steel plate 5 and the lower stopper 6 are connected as a whole. There is a gap of 5mm between the upper surface of the lower stopper 6 and the lower surface of the annular baffle 8, so as to avoid the frictional force generated when the contact between the two is displaced horizontally. When the upper cover plate moves upward as a whole, the lower stopper 6 Full contact with the annular baffle 8 restricts the movement of the upper cover 4, thereby forming the ability to resist pulling out.

A rubber pad 10 is pasted on the lower surface of the lower block 6 and around the short column 9 to prevent a strong collision between the outer cylinder 11 of the slider 3 and the short column 9 when the large earthquake displacement is too large. When the structure has a vertical displacement, the collision between the upper surface of the lower block 6 and the lower surface of the annular baffle 8 is avoided, so as to protect the integrity of each device.

The slider 3 includes an outer cylinder 11 and a groove core block 12 , the groove core block 12 has the same curvature as the spherical protrusion of the lower stopper 6 . An installation hole is provided on the outer cylinder 11 for the insertion of the shape memory alloy coil spring 2 . The size of the installation hole on the outer cylinder is the same as that of the shape memory alloy spring and is determined according to the diameter of the coil spring. As shown in Figure 3, the two ends of the shape memory alloy coil spring 2 are linear, and the surface of the shape memory alloy coil spring 2 is engraved with threads, and the two ends are respectively connected with the side wall 15 and the side wall 15 with lock nuts 13 of suitable size. The outer cylinder 11 is fixedly connected.

The lower block 6 is in the shape of a dial, as shown in FIG. 4 , the diameter d of the hollow hole area 18 of the lower block 6 is 120 mm.

The stub 9 is cylindrical and its cross section is circular.

The support connects the upper cover plate 4 and the lower connecting steel plate 1 to the structure through connecting bolts 17 respectively.

In this example, first assemble each component after processing, and the specific installation steps are as follows:

a. Processing the shape memory alloy coil spring 2, the lower connecting steel plate 1, the slider 3, the short column 9, the annular baffle 8 and the upper cover plate 4, the structure of the shape memory alloy spring is shown in Figure 5;

b. The lower end of the stub 9 is welded to the upper surface of the bottom plate 14 of the lower connecting steel plate 1;

c. Place the slider 3 with the polytetrafluoroethylene friction coating 16 on the lower surface at the center of the bottom plate 14;

d. One end of the shape memory alloy coil spring 2 passes through the outer cylinder 11, and two locking nuts 13 are used to fix the shape memory alloy coil spring 2 to the outer cylinder 11. The shape memory alloy coil spring 2 is connected to the outer cylinder 11. The junction of the outer cylinder 11 is shown in Figure 6, and the other end is fixedly connected with the side wall 15 in the same way;

e. Place the spherical protrusion of the lower stopper 6 of the upper cover plate 4 in place with the groove core block 12;

f. Splice the circular baffle 8, and weld the lower surface of the circular baffle 8 to the upper surface of the short column 9.

Example 2

A vibration-isolation support, same as Embodiment 1, the difference is that: the gap between the upper surface of the lower stopper 6 and the lower surface of the annular baffle 8 is 7.5 mm.

Example 3

A vibration-isolation support, same as Embodiment 1, the difference is that: the gap between the upper surface of the lower block 6 and the lower surface of the circular baffle 8 is 6.25mm.

Example 4

A shock-isolation support, the same as the first embodiment, the difference is that: the gap between the upper surface of the lower block 6 and the lower surface of the ring-shaped baffle 8 is 8.75mm.

Example 5

A vibration-isolation support, the same as the first embodiment, the difference is that: the gap between the upper surface of the lower block 6 and the lower surface of the ring-shaped baffle 8 is 10mm.

Example 6

A shock-isolation support, the same as that of Embodiment 1, the difference lies in that the cross-section of the short column 9 is rectangular.

Example 7

A vibration-isolation support, the same as the first embodiment, the difference lies in: the diameter d of the hollow hole area 18 of the lower block 6 is 100mm.

Example 8

A vibration-isolation support, the same as the first embodiment, the difference lies in: the diameter d of the hollow hole area 18 of the lower block 6 is 150 mm.

Example 9

A vibration-isolation support, the same as the first embodiment, the difference lies in: the diameter d of the hollow hole area 18 of the lower block 6 is 130 mm.

The embodiments described above are only preferred implementations of the present utility model, and the present utility model is not limited thereto. It should be pointed out that, for those of ordinary skill in the art, the utility model can , and several improvements and modifications can also be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims (15)

1. A shock-isolation bearing, comprising a lower connecting steel plate, a slider, a coil spring, an anti-pull baffle and an upper cover; The upper cover plate includes an upper connecting steel plate and a lower stopper, and the upper connecting steel plate and the lower stopper are fixedly connected as one; The lower connecting steel plate includes a bottom plate and a side wall, and the bottom plate and the side wall are fixedly connected as one; The slider includes an outer cylinder and a groove core block, the slider is arranged on the upper surface of the lower connecting steel plate bottom plate, the outer cylinder of the slider and the side wall of the lower connecting steel plate are connected by the coil spring ; The pullout baffle is arranged in front of the upper connecting steel plate and the lower stopper, and the pullout baffle includes the annular baffle and the short column, and the short column and the annular The baffle is fixedly connected as a whole, the short column passes through the lower block, and the other end of the short column is fixedly connected to the lower connecting steel plate bottom plate. 2. The vibration-isolation support according to claim 1, wherein the material used for the coil spring is a shape memory alloy. 3. The shock-isolation support according to claim 1, wherein the sliding block slides on the bottom plate of the lower connecting steel plate. 4. The vibration isolation support according to claim 1, characterized in that: a polytetrafluoroethylene coating is arranged on the horizontal surface of the bottom of the slider. 5. The shock-isolation bearing according to claim 1, characterized in that: a rubber pad is arranged around the periphery of the short column. 6. The shock-isolation bearing according to claim 1, characterized in that: a rubber pad is arranged on the lower surface of the pull-out baffle. 7. The vibration-isolation support according to claim 1, characterized in that: both ends of the coil spring are linear, and threads are engraved on the surface. 8. The vibration-isolation support according to claim 1, wherein the coil spring is connected to the outer cylinder and the side wall through a locking nut. 9. The shock-isolation bearing as claimed in claim 1, characterized in that: the groove core block of the slider has a spherical depression. 10. The vibration isolation support according to claim 1, characterized in that: the bottom of the lower stop has a spherical protrusion. 11. The vibration isolation bearing according to claim 9, characterized in that: the spherical diameter of the spherical protrusion at the bottom of the lower stopper is the same as the spherical diameter of the spherical depression of the groove core block in claim 8 . 12. The seismic isolation support according to claim 1, wherein the cross section of the short column is circular or rectangular. 13. The shock-isolation support according to claim 1, characterized in that: the cross-section of the outer cylinder of the slider is octagonal. 14. The vibration isolation support according to claim 1, characterized in that: a gap of 5-10 mm is provided between the upper surface of the lower stopper and the lower surface of the annular baffle. 15. The shock-isolation bearing according to claim 1, characterized in that: the slider is arranged between rubber and steel plates.