Cylinder type self-resetting multiple damping device

Abstract

The utility model provides a barrel type self-resetting multiple damping device, which belongs to the technical field of damping devices, solves the problem that the existing damping damper cannot realize multiple damping and resetting, and comprises a columnar damping barrel and a movable guide rod, the damping cylinder is sequentially divided into a first damping chamber, a second damping chamber and a third damping chamber; a first movable baffle and a second movable baffle are connected to the movable guide rod, a high-compressibility spring is arranged between the first cover plate and the first movable baffle, a disc spring piece is arranged between the second movable baffle and the first fixed baffle, and two friction steel plates are arranged in the third damping chamber in the length direction of the third damping chamber. A long groove hole is formed in the friction steel plate in the length direction of the friction steel plate, a U-shaped rod is perpendicularly connected to the movable guide rod, and two cross rod sections of the U-shaped rod are arranged in the long groove hole in a friction moving mode. The shock-absorbing damper has a self-resetting function and multiple shock-absorbing effects, is easy to disassemble and replace, and solves the problems that a traditional shock-absorbing damper is single in energy consumption and poor in shock-absorbing stability.

Description

Technical Field

[0001] The utility model belongs to the technical field of shock absorbing devices, and in particular relates to a cylinder-type self-resetting multiple shock absorbing device. Background Art

[0002] In traditional building structure seismic design, the cross-sectional area of ​​components or reinforcement ratio is usually increased to meet the requirements of seismic fortification, but this will inevitably increase the cost and building area, and affect the appearance of the use function. Earthquakes are usually unpredictable. When encountering large, rare or even huge earthquakes, most building structures often cannot resist the seismic force, resulting in local damage to structural components and the continuous collapse of the entire building structure.

[0003] In addition, in the reinforcement and renovation of some existing buildings, it is usually difficult to reinforce the building under the premise that the original structural components cannot be demolished or the area of ​​​​the building cannot be increased due to the influence of the building's use function. If a suitable shock-absorbing damper is added to the building structure, it can not only offset the force of the earthquake, but also does not affect the use function of the structural components, and at the same time reduce the maintenance cost of the damper. However, the existing shock-absorbing dampers have the problems of simple structure and poor shock absorption effect, or complex structure and cannot be multiple shock absorption and reset. Therefore, a self-resetting and multiple shock absorption device is needed to meet the needs of building structure shock absorption and earthquake resistance. Utility Model Content

[0004] The utility model aims to provide a cylindrical self-resetting multiple shock absorbing device to solve the problem that the existing shock absorbing damper cannot perform multiple shock absorbing and resetting.

[0005] The technical scheme of the utility model is: a cylinder-type self-resetting multiple shock-absorbing device, the shock-absorbing device comprises a columnar shock-absorbing cylinder and a movable guide rod, a first cover plate and a second cover plate are respectively arranged at both ends of the shock-absorbing cylinder, a first fixed baffle plate and a second fixed baffle plate are arranged in sequence in the shock-absorbing cylinder, and the first fixed baffle plate and the second fixed baffle plate sequentially separate the shock-absorbing cylinder into a first shock-absorbing chamber, a second shock-absorbing chamber and a third shock-absorbing chamber; the movable guide rod extends from the third shock-absorbing chamber into the first shock-absorbing chamber, and the movable guide rod sequentially penetrates the second cover plate, the second fixed baffle plate and the first fixed baffle plate, the movable guide rod is respectively connected with the first movable baffle plate and the second movable baffle plate, the first movable baffle plate is in the first shock-absorbing chamber, and the second movable baffle plate is in the second shock-absorbing chamber, a high-compression spring is arranged between the first cover plate and the first movable baffle plate, a plurality of disc spring plates are arranged between the second movable baffle plate and the first fixed baffle plate, two friction steel plates are arranged in the third shock-absorbing chamber along its length direction, a long slot hole is opened on the friction steel plate along its length direction, a U-shaped rod is vertically connected to the movable guide rod, and two cross bar sections of the U-shaped rod can be frictionally moved and arranged in the long slot hole.

[0006] As a further improvement of the utility model, the two cross bar sections of the U-shaped rod are screws, the lower end of the screw is connected with a nut through a thread, the nut fits the lower surface of the friction steel plate, and a gasket is also provided on the screw, which fits the upper surface of the friction steel plate and the cross bar section of the U-shaped rod.

[0007] As a further improvement of the utility model, a first connecting hole is provided on the outer side of the first cover plate, and a second connecting hole is provided on one end of the movable guide rod extending out of the third damping chamber.

[0008] As a further improvement of the utility model, the movable guide rod passes through the second cover plate, the second fixed baffle plate and the first fixed baffle plate, respectively, and is sleeved with a first rubber ring; the first movable baffle plate and the second movable baffle plate are sleeved with a second rubber ring at the contact with the inner wall of the cylinder.

[0009] As a further improvement of the utility model, the movable guide rod is connected to the first movable baffle plate and the second movable baffle plate respectively through threads; the first cover plate and the second cover plate are connected to the inner wall of the cylinder respectively through threads.

[0010] As a further improvement of the utility model, the columnar shock-absorbing cylinder is composed of two semi-arc-shaped shock-absorbing cylinders, the outer wall of the semi-arc-shaped shock-absorbing cylinder is provided with a plurality of bolt holes, and the bolt holes on the two shock-absorbing cylinders are connected by bolts.

[0011] The beneficial effects of the utility model are as follows:

[0012] The shock absorbing device of the utility model mainly generates energy consumption by compression deformation. The movable guide rod connected to the external load through the pin shaft generates compression force, so that the screw on the U-shaped rod in the third shock absorbing chamber slides and rubs in the long slot hole of the friction steel plate, thereby offsetting a part of the external load and generating a certain displacement. Under the thrust of the movable guide rod, the disc spring group of the second shock absorbing chamber and the high compression spring of the first shock absorbing chamber generate compression deformation, and enter elastic-plastic deformation yield to consume the external load. After the external load ends, the high compression spring of the first shock absorbing chamber and the disc spring group of the second shock absorbing chamber generate self-restoring force, so that the movable guide rod of the third shock absorbing chamber returns to the initial position. Through the common energy consumption of the three shock absorbing chambers, the external load can be offset to play a role in shock absorption, and at the same time, it can be restored to its original state, achieving multiple shock absorption purposes.

[0013] The shock absorbing device of the utility model has a self-reset function and multiple shock absorbing effects. It utilizes the characteristics of good plasticity, low yield point, high ductility of soft steel and the friction of bolts in series to form multiple shock absorbing effects. The device is easy to disassemble and replace, and is low in cost. It overcomes the problem of single energy consumption and poor shock absorption stability of traditional shock absorbing dampers. It can be set at the beam-column node to change the traditional structure that relies on the plastic hinge at the beam end to dissipate energy, thereby achieving the design principle of "strong node, weak component", ensuring that the node has sufficient strength and ductility and meets the functional requirements of the structure. It can also be used for energy dissipation support, set in the frame to offset the axial force transmitted from the support, increase the rigidity and ductility of the structure, thereby reducing the displacement of the structure, reducing the damage to the main structure, and achieving a shock absorbing effect, so that its building structure can achieve the three principles of "small earthquakes are not damaged, medium earthquakes can be repaired, and large earthquakes do not occur". BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front cross-sectional view of the structure of the shock absorbing device of the utility model;

[0015] Figure 2 This is a structural diagram of a movable guide rod in the shock absorbing device of the utility model;

[0016] Figure 3 This is a structural diagram of a U-shaped rod in the shock absorbing device of the utility model;

[0017] Figure 4 It is a side cross-sectional view of the U-shaped rod structure in the shock absorbing device of the utility model;

[0018] Figure 5 It is a front cross-sectional view of the shock absorbing tube structure in the shock absorbing device of the utility model;

[0019] Figure 6 This is a schematic diagram of the utility model shock absorbing device being arranged at the beam-column node;

[0020] Figure 7 The utility model is a schematic diagram of the shock absorbing device being arranged in the support between the frame columns.

[0021] In the figure: 1- shock absorbing device; 101- shock absorbing cylinder; 2- first shock absorbing chamber; 3- second shock absorbing chamber; 4- third shock absorbing chamber; 5- first cover plate; 6- movable guide rod; 71- first rubber ring; 72- second rubber ring; 8- U-shaped rod; 9- thread; 10- nut; 111- first fixed baffle; 112- second fixed baffle; 121- first movable baffle; 122- first movable baffle; 13- inner wall of cylinder; 14- first connecting hole; 15- second connecting hole; 16- screw rod; 17- slot; 18- gasket; 19- second cover plate; 20- high compression spring; 21- disc spring; 22- friction steel plate; 23- long slot hole; 24- bolt hole; 25- bolt; 26- beam; 27- column; 28- anchor bar; 29- connector; 30- inter-column support. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] like Figure 1-Figure 5 As shown, a cylinder-type self-resetting multiple shock-absorbing device, the shock-absorbing device 1 includes a columnar shock-absorbing cylinder 101 and a movable guide rod 6, the two ends of the shock-absorbing cylinder 101 are respectively provided with a first cover plate 5 and a second cover plate 19, the shock-absorbing cylinder 101 is sequentially provided with a first fixed baffle plate 111 and a second fixed baffle plate 112, the first fixed baffle plate 111 and the second fixed baffle plate 112 divide the shock-absorbing cylinder 101 into a first shock-absorbing chamber 2, a second shock-absorbing chamber 3 and a third shock-absorbing chamber 4 in sequence; the movable guide rod 6 extends from the third shock-absorbing chamber 4 into the first shock-absorbing chamber 2, and the movable guide rod 6 sequentially passes through the second cover plate 19, the second fixed baffle plate 112 and the first fixed baffle plate 111, and the movable guide rod 6 sequentially passes through the second cover plate 19, the second fixed baffle plate 112 and the first fixed baffle plate 111. The first movable baffle 121 and the second movable baffle 122 are connected to the movable guide rod 6, respectively. The first movable baffle 121 is in the first damping chamber 2, and the second movable baffle 122 is in the second damping chamber 3. A high-compression spring 20 is provided between the first cover plate 5 and the first movable baffle 121, and a plurality of disc springs 21 are provided between the second movable baffle 122 and the first fixed baffle 111. Two friction steel plates 22 are provided along the length direction of the third damping chamber 4, and a long slot hole 23 is provided on the friction steel plate 22 along the length direction. The movable guide rod 6 is vertically connected to the U-shaped rod 8, and the two cross bar sections of the U-shaped rod 8 can be frictionally moved and arranged in the long slot hole 23. The inner wall 13 of the damping cylinder 101 is symmetrically provided with a plurality of slots 17, and the first fixed baffle 111 and the second fixed baffle 112 are sequentially provided in the slots 17.

[0024] The two cross bar sections of the U-shaped rod 8 are screws 16, and the lower end of the screw 16 is connected to a nut 10 through a thread. The nut 10 is attached to the lower surface of the friction steel plate 22. A gasket 18 is also provided on the screw 16, and the gasket 18 is attached to the upper surface of the friction steel plate 22 and the cross bar section of the U-shaped rod 8.

[0025] A first connecting hole 14 is provided on the outer side of the first cover plate 5 , and a second connecting hole 15 is provided on one end of the movable guide rod 6 extending out of the third damping chamber 4 .

[0026] The movable guide rod 6 passes through the second cover plate 19 , the second fixed baffle 112 and the first fixed baffle 111 and is sleeved with a first rubber ring 71 ; the first movable baffle 121 and the second movable baffle 122 are sleeved with a second rubber ring 72 at the contact point with the inner wall 13 of the cylinder.

[0027] The movable guide rod 6 is connected to the first movable baffle 121 and the second movable baffle 122 respectively through threads 9 ; the first cover plate 5 and the second cover plate 19 are connected to the inner wall 13 of the cylinder respectively through threads 9 .

[0028] The columnar shock-absorbing cylinder 101 is composed of two semi-arc-shaped shock-absorbing cylinders 101 . The outer wall of the semi-arc-shaped shock-absorbing cylinder 101 is provided with a plurality of bolt holes 24 . The bolt holes 24 on the two shock-absorbing cylinders 101 are connected by bolts 25 .

[0029] The cross section of the high-compression spring 20 is rectangular, and compared with the circular cross section, it has a greater bearing capacity, absorbs more energy, and has a stable stiffness; the disc spring 21 is drum-shaped, and is composed of a plurality of disc springs 21 connected in series to form a disc spring 21 group, and the disc springs 21 produce elastic-plastic deformation when they are squeezed against each other; the first movable baffle 121 and the second movable baffle 122 can play a role in compressing the high-compression spring 20 and the disc spring 21; under the pre-tightening force of the nut 10 and the gasket 18, when the screw 16 moves in the long slot hole 23, friction can be generated, and the nut 10 and the long slot hole 23 of the U-shaped rod 8 are set 3 can have limiting and guiding effects; the first rubber ring 71 can increase the friction resistance between the movable guide rod 6 and the through hole and protect the connection; the second rubber ring 72 can increase the friction resistance of the first movable baffle 121 and the second movable baffle 122 in contact with the inner wall 13 of the cylinder and protect the connection; the parts connected by the thread 9 can be easily disassembled and replaced for maintenance, thereby improving work efficiency; two semi-arc-shaped shock-absorbing cylinders 101 are spliced ​​to form a columnar shock-absorbing cylinder 101, which can facilitate the inspection of the internal parts and improve the replacement and maintenance efficiency.

[0030] The utility model selects to use the following two methods:

[0031] Method 1: Use the shock absorbing device 1 at the node positions of the first-floor beams 26 and columns 27 of the frame structure: First, weld the connectors 29 at the embedded anchor bars 28 of the concrete beams 26 and columns 27, and then connect the ends of the shock absorbing cylinder 101 and the movable guide rod 6 to the two connectors 29 respectively;

[0032] Specific as Figure 6 As shown, the shock absorbing device 1 of the utility model can be arranged at the node position of the first-floor beam 26 and column 27 of the frame structure, and the connecting parts can be welded at the pre-embedded anchor bars 28 of the concrete beams 26 and columns 27, and then the first connecting holes 14 and the second connecting holes 15 of the shock absorbing device 1 are respectively bolted to the connecting parts 29 through pins; when the nodes of the bottom-layer frame beams 26 and columns 27 produce linear displacement, the shock absorbing device 1 provides damping force to reduce external loads.

[0033] Method 2: Use the shock-absorbing device 1 for the frame column support 30: The column support 30 is divided into two sections and arranged at relative corners of the frame, one end of one column support 30 is arranged at the connection between the beam 26 and the column 27, and one end of the other column support 30 is arranged at the connection between the column 27 and the ground, and then the ends of the shock-absorbing cylinder 101 and the movable guide rod 6 are respectively arranged and connected between the two column supports 30.

[0034] Specific as Figure 7As shown in the figure, the shock absorption device 1 of the present utility model can be arranged in the frame column bracing 30 as an energy dissipation bracing. The column bracing 30 is arranged at the opposite corners of the frame, one end is arranged at the connection between the beam 26 and the column 27, and the other end is arranged at the connection between the column 27 and the ground. The shock absorption device 1 is connected in the middle of the column bracing 30 through the first connection hole 14 and the second connection hole 15. When the external load F is transmitted to the joint position of the beam 26 and the column 27 by the arrow direction and generates a displacement Δ, the column bracing 30 can share the axial force, and the axial force is offset by the shock absorption device 1 to reduce the inter-story displacement Δ.

[0035] In order to clarify the energy dissipation working mechanism of the shock absorption device 1 of the present utility model, the energy dissipation control can be divided into friction energy dissipation, disc spring compression yield energy dissipation, and spring compression deformation energy dissipation. The mathematical expressions in different stages are as follows:

[0036]

[0037] Where: F is the damping force; x1 is the displacement of the 21 groups of disc spring pieces 21; x2 is the displacement of the high compressibility spring 20; S is the maximum sliding range of the screw 16, that is, the length of the long slot hole 23 in the friction steel plate 22; F1 is the friction force; F2 is the disc spring force; F3 is the spring force; N is the pre-tightening force of the screw; μ is the friction coefficient; k1 is the elastic stiffness of the disc spring piece 21; k2 is the elastic stiffness of the high compressibility spring 20.

[0038] The conditions that the above mathematical expressions need to meet are: 1. F = F1 + F1 + F2; 2. F1 < F1 + F2. When designing, it should be ensured that the damping force is equal to the sum of the friction force, the disc spring force and the spring force, and it should also be ensured that the friction force of the screw 16 is much smaller than the sum of the restoring forces of the high compressibility spring 20 and the 21 groups of disc spring pieces, so as to ensure that the high compressibility spring 20 and the 21 groups of disc spring pieces have sufficient restoring forces.

[0039] When the shock absorption device 1 of the present utility model is used, the damage is concentrated on itself, effectively dissipating the energy input by the earthquake, increasing the toughness of the building structure during the earthquake and the reparability after the earthquake, improving the seismic performance of the structure, and reducing the seismic force and residual displacement of the structure. The shock absorption device 1 of the present utility model has the advantages of small volume, multiple shock absorptions, easy manufacturing, and low maintenance cost, and is easy to be installed at the joints of the beam 26 and the column 27 and the frame column bracing 30 for use, and can also be used in other shock absorption designs in its field, with a wide range of applications.

Claims

1. A cylindrical self-resetting multiple shock absorbing device, characterized in that: The shock absorbing device (1) comprises a columnar shock absorbing cylinder (101) and a movable guide rod (6); a first cover plate (5) and a second cover plate (19) are respectively provided at both ends of the shock absorbing cylinder (101); a first fixed baffle plate (111) and a second fixed baffle plate (112) are sequentially provided in the shock absorbing cylinder (101); the first fixed baffle plate (111) and the second fixed baffle plate (112) sequentially separate the shock absorbing cylinder (101) into a first shock absorbing chamber (2), a second shock absorbing chamber (3) and a third shock absorbing chamber (4); the movable guide rod (6) extends from the third shock absorbing chamber (4) into the first shock absorbing chamber (2); the movable guide rod (6) sequentially passes through the second cover plate (19), the second fixed baffle plate (112) and the first fixed baffle plate (111); the movable guide rod (6) ) are respectively connected to a first movable baffle (121) and a second movable baffle (122), the first movable baffle (121) is in the first damping chamber (2), and the second movable baffle (122) is in the second damping chamber (3), a high-compression spring (20) is provided between the first cover plate (5) and the first movable baffle (121), a plurality of disc springs (21) are provided between the second movable baffle (122) and the first fixed baffle (111), two friction steel plates (22) are provided in the third damping chamber (4) along its length direction, and a long slot hole (23) is opened on the friction steel plate (22) along its length direction, a U-shaped rod (8) is vertically connected to the movable guide rod (6), and two cross bar sections of the U-shaped rod (8) are arranged in the long slot hole (23) so as to be frictionally movable.

2. A cylindrical self-resetting multiple shock absorbing device according to claim 1, characterized in that: The two cross-bar sections of the U-shaped rod (8) are screw rods (16), the lower ends of the screw rods (16) are connected to nuts (10) via threads, the nuts (10) are fitted to the lower surface of the friction steel plate (22), and the screw rods (16) are also provided with gaskets (18), which are fitted to the upper surface of the friction steel plate (22) and the cross-bar sections of the U-shaped rod (8).

3. A cylindrical self-resetting multiple shock absorbing device according to claim 1 or 2, characterized in that: A first connection hole (14) is provided on the outer side of the first cover plate (5), and a second connection hole (15) is provided on one end of the movable guide rod (6) extending out of the third damping chamber (4).

4. A cylindrical self-resetting multiple shock absorbing device according to claim 3, characterized in that: The positions where the movable guide rod (6) passes through the second cover plate (19), the second fixed baffle plate (112) and the first fixed baffle plate (111) are respectively sleeved with first rubber rings (71); the positions where the first movable baffle plate (121) and the second movable baffle plate (122) contact the inner wall (13) of the cylinder are sleeved with second rubber rings (72).

5. A cylindrical self-resetting multiple shock absorbing device according to claim 4, characterized in that: The movable guide rod (6) is connected to the first movable baffle (121) and the second movable baffle (122) respectively via threads (9); the first cover plate (5) and the second cover plate (19) are connected to the inner wall (13) of the cylinder respectively via threads (9).

6. A cylindrical self-resetting multiple shock absorbing device according to claim 1, characterized in that: The columnar shock absorbing cylinder (101) is composed of two semi-arc-shaped shock absorbing cylinders (101), the outer wall of the semi-arc-shaped shock absorbing cylinder (101) is provided with a plurality of bolt holes (24), and the bolt holes (24) on the two shock absorbing cylinders (101) are connected by bolts (25).

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