Horizontal variable frequency vibration isolation device

Abstract

The application relates to a horizontal variable-frequency shock isolation device, which is arranged between a foundation and a facility and comprises a frame, a plurality of elastic members, cross-arranged guide rails and sliders arranged on the guide rails, the guide rails are respectively connected with inner edge frames of the frame, one end of each of the elastic members is connected with a slider, and the other end of each of the elastic members is connected with the inner edge frame of the frame, so that the shock isolation efficiency of the horizontal variable-frequency shock isolation device can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of earthquake disaster prevention and reduction, and in particular to a horizontal variable frequency seismic isolation device. Background Art

[0002] In recent years, earthquakes have caused huge losses to people's lives and property. Investigations have found that not only were houses and buildings severely damaged in the earthquakes, but the power facilities, which are lifeline projects, were even more seriously damaged. The power outages caused by the earthquakes have seriously affected the development of emergency rescue work.

[0003] In reality, in order to resist the risk of earthquake disasters, structural design optimization is one of the seismic resistance technical methods, but the optimization space is limited and the economic efficiency is poor. Seismic isolation design that reduces the transmission of seismic motion energy to the structure has become a key technology in the field of earthquake disaster prevention and mitigation.

[0004] There are many horizontal seismic isolation designs at present, but the seismic isolation efficiency of such rubber or rubber lead core supports is low. Therefore, the present invention provides a horizontal variable frequency seismic isolation device. Summary of the Invention

[0005] In order to solve the above-mentioned deficiencies in the prior art, the present invention provides a horizontal variable frequency seismic isolation device.

[0006] The technical solution provided by the present invention is:

[0007] A horizontal variable frequency seismic isolation device, characterized in that: the seismic isolation device is arranged between a foundation and a facility, and comprises: a frame, a plurality of elastic members, cross-arranged guide rails, and a slider arranged on the guide rails;

[0008] The guide rails are respectively connected to the inner frames of the frame; one ends of the multiple elastic members are respectively connected to the sliders, and the other ends of the elastic members are respectively connected to the inner frames of the frame.

[0009] Preferably, the device further comprises an upper plate; the frame comprises an upper steel frame plate (12) and a lower steel frame plate (7);

[0010] The guide rails include an upper guide rail (10) and a lower guide rail (4);

[0011] The two ends of the upper guide rail (10) are connected to the inner frame of the upper steel frame plate (12) to form an upper seismic isolation mechanism (1);

[0012] The two ends of the lower guide rail (4) are connected to the inner frame of the lower steel frame plate (7) to form a lower seismic isolation mechanism (2);

[0013] The upper seismic isolation mechanism (1) is arranged on the lower seismic isolation mechanism (2), and the lower seismic isolation mechanism (2) is arranged on a foundation;

[0014] The upper plate is arranged on the upper seismic isolation mechanism (1), and the facilities are arranged on the upper plate.

[0015] Preferably, the slider includes a central slider (5), and the central slider (5) is located at the intersection of the upper guide rail (10) and the lower guide rail (4).

[0016] Preferably, the central slider (5) comprises two groove structures, the planes of the first groove and the second groove are fixedly connected, and the opening directions of the two grooves are perpendicular to each other;

[0017] The concave portion of the first groove structure faces downwards and is clamped on the lower guide rail (4), and the concave portion of the second groove structure faces upwards and is clamped on the upper guide rail (10).

[0018] Preferably, the slider further comprises a side slider; the side slider comprises at least two upper side sliders (11) and two lower side sliders (7);

[0019] The upper side slider (11) and the lower side slider (7) are respectively located on the upper guide rail (10) and the lower guide rail (4).

[0020] Preferably, the upper side slider (11) and the lower side slider (7) respectively have a groove structure;

[0021] The concave portion of the groove structure of the upper side slider (11) faces downwards and is clamped on the upper guide rail (10); the concave portion of the groove structure of the lower side slider (7) faces downwards and is clamped on the lower guide rail (4).

[0022] Preferably, the elastic member is a spring, and the number of the springs matches the number of the side sliders and the center slider (5);

[0023] The spring comprises an upper spring (9) and a lower spring (3); one end of the upper spring (9) is hung on the second groove structure of the central slider (5), and the other end is hung on the upper steel frame plate (12) parallel to the upper guide rail (10);

[0024] One end of the lower layer spring (3) is hung on the lower layer side slider (6), and the other end is hung on the lower layer steel frame plate (7) parallel to the lower layer guide rail (4).

[0025] Preferably, the seismic isolation mechanism further comprises: a spring positioning pin;

[0026] The spring positioning pins include an upper spring positioning pin (13) and a lower spring positioning pin (8);

[0027] The upper spring positioning pins (13) are arranged on the upper steel frame plates (12) on both sides of the upper spring (9);

[0028] The lower spring positioning pins (8) are arranged on the lower steel frame plates (7) on both sides of the lower spring (3).

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. The present invention provides a horizontal variable frequency seismic isolation device, which is arranged between a foundation and a facility, and includes: a frame, a plurality of elastic members, cross-arranged guide rails and sliders arranged on the guide rails, the guide rails are respectively connected to the inner frames of the frame, one end of the plurality of elastic members is respectively connected to the sliders, and the other ends of the elastic members are respectively connected to the inner frames of the frame. This device can effectively improve the seismic isolation efficiency of the horizontal variable frequency seismic isolation device.

[0031] 2. The present invention provides a horizontal variable frequency seismic isolation device. When an earthquake occurs, the horizontal variable frequency seismic isolation device has zero stiffness under a certain displacement, and basically does not absorb seismic energy at this time. Beyond this displacement, the stiffness of the horizontal variable frequency seismic isolation device gradually increases from zero, and part of the seismic energy is absorbed in this stage. After the maximum displacement of the seismic motion, the seismic energy absorbed by the horizontal variable frequency seismic isolation device is small, thereby protecting the safety of the upper structure.

[0032] 3. The present invention provides a horizontal variable frequency vibration isolation device, which has a simple structure, is easy to install and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0034] Figure 1 It is the side view of the horizontal variable frequency seismic isolation device;

[0035] Figure 2 This is the plan view of the upper seismic isolation mechanism;

[0036] Figure 3 This is the plan view of the lower-level seismic isolation mechanism;

[0037] Figure 4 It is the plan view of the horizontal variable frequency seismic isolation device;

[0038] Figure 5 It is a three-dimensional view of the horizontal variable frequency seismic isolation device;

[0039] In the figure: 1-upper layer seismic isolation mechanism, 2-lower layer seismic isolation mechanism, 3-lower layer spring, 4-lower layer guide rail, 5-center slider, 6-lower layer side slider (6), 7-lower layer steel frame plate, 8-lower layer spring positioning pin, 9-upper layer spring, 10-upper layer guide rail, 11-upper layer side slider, 12-upper layer steel frame plate, 13-upper layer spring positioning pin. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] like Figure 1 As shown, the present invention provides a horizontal variable frequency seismic isolation device, which is arranged between a foundation and a facility, and includes: a frame, a plurality of elastic members, cross-arranged guide rails, and sliders arranged on the guide rails;

[0042] The guide rails are respectively connected to the inner frames of the frame; one ends of the multiple elastic members are respectively connected to the sliders, and the other ends of the elastic members are respectively connected to the inner frames of the frame; this device can effectively improve the seismic isolation efficiency of the horizontal variable frequency seismic isolation device.

[0043] like Figure 2 and Figure 3 As shown, they are respectively a plan view of the upper isolation mechanism and a plan view of the lower isolation mechanism; the device also includes an upper plate; the frame includes an upper steel frame plate 12 and a lower steel frame plate 7;

[0044] The guide rails include an upper guide rail 10 and a lower guide rail 4;

[0045] The two ends of the upper guide rail 10 are connected to the inner frame of the upper steel frame plate 12 to form the upper seismic isolation mechanism 1;

[0046] The two ends of the lower guide rail 4 are connected to the inner frame of the lower steel frame plate 7 to form the lower seismic isolation mechanism 2;

[0047] The upper seismic isolation mechanism 1 is arranged on the lower seismic isolation mechanism 2, and the lower seismic isolation mechanism 2 is arranged on the foundation;

[0048] The upper plate is arranged on the upper seismic isolation mechanism 1, and the facilities are arranged on the upper plate.

[0049] like Figure 4As shown, it is a plan view of the horizontal variable frequency vibration isolation device. The central slider 5 includes two groove structures. The planes of the first groove and the second groove are fixedly connected, and the opening directions of the two grooves are perpendicular to each other.

[0050] The concave portion of the first groove structure faces downward and is clamped on the lower guide rail 4 , and the concave portion of the second groove structure faces upward and is clamped on the upper guide rail 10 .

[0051] The slider further comprises side sliders; the side sliders comprise at least two upper side sliders 11 and two lower side sliders 7;

[0052] The upper side slider 11 and the lower side slider 7 are respectively located on the upper guide rail 10 and the lower guide rail 4 .

[0053] The upper side slider 11 and the lower side slider 7 each have a groove structure;

[0054] The upper side slider 11 has a groove structure with the concave portion facing downwards, and is clamped to the upper guide rail 10. The lower side slider 7 has a groove structure with the concave portion facing downwards, and is clamped to the lower guide rail 4. The elastic member is a spring, and the number of the springs matches the number of the side sliders and the center slider 5.

[0055] The spring includes an upper spring 9 and a lower spring 3; one end of the upper spring 9 is hung on the second groove structure of the central slider 5, and the other end is hung on the upper steel frame plate 12 parallel to the upper guide rail 10;

[0056] One end of the lower spring 3 is hung on the lower side slider 6, and the other end is hung on the lower steel frame plate 7 parallel to the lower guide rail 4. The seismic isolation mechanism also includes: a spring positioning pin;

[0057] The spring positioning pins include an upper spring positioning pin 13 and a lower spring positioning pin 8;

[0058] The upper spring locating pins 13 are arranged on the upper steel frame plates 12 on both sides of the upper spring 9;

[0059] The lower spring locating pins 8 are arranged on the lower steel frame plates 7 on both sides of the lower spring 3 .

[0060] like Figure 5 The figure shows a three-dimensional view of the horizontal frequency conversion seismic isolation device. When an earthquake occurs, the horizontal frequency conversion seismic isolation device has zero stiffness at a certain displacement, and basically does not absorb seismic energy. Beyond this displacement, the stiffness of the horizontal frequency conversion seismic isolation device gradually increases from zero, and part of the seismic energy is absorbed in this stage. After the maximum displacement of the seismic motion, the seismic energy absorbed by the horizontal frequency conversion seismic isolation device is small, thereby protecting the safety of the upper structure. In addition, the device has a simple structure, is easy to install, and is easy to use.

[0061] The working principle of the horizontal variable frequency seismic isolation device is as follows: When an earthquake acts in the direction of the upper seismic isolation mechanism guide rail 10, the upper side slider 11 is displaced relative to the center slider 5. Due to a certain initial free sliding displacement between the center slider 5, the seismic energy transmitted from the bottom to the upper structure under the displacement is approximately zero;

[0062] When the local vibration displacement exceeds the free sliding displacement, the central slider 5 begins to slide along the upper guide rail 10. At this time, the upper spring 9 generates a nonlinear restoring force along with the central slider 5. Since the upper spring 9 is initially perpendicular to the upper guide rail 10,

[0063] That is, when the central slider 5 just produces relative displacement with the upper guide rail 10, the stiffness of the upper spring 9 in the direction of the upper guide rail 10 is 0, and then gradually increases, supplementing the large impact effect that is unfavorable to the upper structure.

[0064] Among them, the central slider 5 is an integrated structural design, the lower-layer seismic isolation mechanism is consistent with the upper structure, and the only difference is the arrangement of the lower-layer spring 3. The lower-layer spring 3 of the device is arranged on two lower-layer side sliders 6. The length of the lower-layer spring 3 is 0.5 to 1.0 times the maximum unidirectional horizontal displacement of the non-seismic isolation structure under the action of the design earthquake, and the stiffness of the upper-layer spring 9 is 0.5 to 1.2 times the ratio of the maximum inertia force of the non-seismic isolation structure to the maximum horizontal displacement.

[0065] The stiffness of the lower spring 3 is 0.5 times that of the upper spring 9. The spacing between the sliders on the same guide rail is determined by the target isolation efficiency and is recommended to be 0.2 to 0.5 times the maximum horizontal displacement of the non-isolated structure.

[0066] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be encompassed by the scope of the pending claims.

Claims

1. A horizontal variable frequency seismic isolation device, characterized in that: The seismic isolation device is arranged between the foundation and the facility, and includes: a frame, a plurality of elastic members, cross-arranged guide rails, and sliders arranged on the guide rails; The guide rails are respectively connected to the inner frames of the frame; one end of each of the plurality of elastic members is respectively connected to the slider, and the other end of each of the elastic members is respectively connected to the inner frames of the frame; The device further comprises an upper plate; the frame comprises an upper steel frame plate (12) and a lower steel frame plate (7); the guide rail comprises an upper guide rail (10) and a lower guide rail (4); both ends of the upper guide rail (10) are connected to the inner frame of the upper steel frame plate (12) to form an upper seismic isolation mechanism (1); both ends of the lower guide rail (4) are connected to the inner frame of the lower steel frame plate (7) to form a lower seismic isolation mechanism (2); the upper seismic isolation mechanism (1) is arranged on the lower seismic isolation mechanism (2), and the lower seismic isolation mechanism (2) is arranged on a foundation; the upper plate is arranged on the upper seismic isolation mechanism (1), and the facility is arranged on the upper plate; The slider includes a central slider (5), and the central slider (5) is located at the intersection of the upper guide rail (10) and the lower guide rail (4); The slider further comprises a side slider; the side slider comprises at least two upper side sliders (11) and two lower side sliders (6); the upper side sliders (11) and the lower side sliders (6) are respectively located on the upper guide rail (10) and the lower guide rail (4).

2. The device according to claim 1, characterized in that The central slider (5) comprises two groove structures, the planes of the first groove and the second groove are fixedly connected, and the opening directions of the two grooves are perpendicular to each other; The concave portion of the first groove structure faces downwards and is clamped on the lower guide rail (4), and the concave portion of the second groove structure faces upwards and is clamped on the upper guide rail (10).

3. The device according to claim 1, characterized in that The upper side slider (11) and the lower side slider (6) respectively have a groove structure; The concave portion of the groove structure of the upper side slider (11) faces downwards and is clamped on the upper guide rail (10); the concave portion of the groove structure of the lower side slider (6) faces downwards and is clamped on the lower guide rail (4).

4. The device according to claim 3, characterized in that The elastic member is a spring, and the number of the springs matches the number of the side sliders and the center slider (5); The spring comprises an upper spring (9) and a lower spring (3); one end of the upper spring (9) is hung on the second groove structure of the central slider (5), and the other end is hung on the upper steel frame plate (12) parallel to the upper guide rail (10); One end of the lower layer spring (3) is hung on the lower layer side slider (6), and the other end is hung on the lower layer steel frame plate (7) parallel to the lower layer guide rail (4).

5. The device according to claim 4, characterized in that The seismic isolation mechanism further includes: a spring positioning pin; The spring positioning pins include an upper spring positioning pin (13) and a lower spring positioning pin (8); The upper spring positioning pins (13) are arranged on the upper steel frame plates (12) on both sides of the upper spring (9); The lower spring positioning pins (8) are arranged on the lower steel frame plates (7) on both sides of the lower spring (3).

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