CN109024970B

CN109024970B - Shock absorber for fire fighting and coating method of fire-proof layer

Info

Publication number: CN109024970B
Application number: CN201811216031.5A
Authority: CN
Inventors: 崔迪
Original assignee: Dalian University
Current assignee: Dalian University
Priority date: 2017-06-08
Filing date: 2017-06-08
Publication date: 2020-09-22
Anticipated expiration: 2037-06-08
Also published as: CN109113204B; CN109024972A; CN109113204A; CN109306747A; CN109024971A; CN109024968A; CN108060815B; CN109024970A; CN107012968A; CN109024968B; CN108047844A; CN107012968B; CN109024969A; CN109024972B; CN109024971B; CN109024969B; CN108060815A; CN108047844B

Abstract

This divisional application discloses a coating method that is used for bumper shock absorber and flame retardant coating of fire control belongs to building fire control shock attenuation field, for making current buckling restrained brace, bumper shock absorber can have certain high temperature resistant and fire-resistant ability, strengthens its fire prevention function, and the technical essential is: the surface of the shock absorber has a fire retardant coating. The effect is as follows: the surfaces of the buckling-restrained brace and the shock absorber are provided with the fireproof coatings, so that the buckling-restrained brace and the shock absorber can have certain high-temperature resistance and fire resistance, and the fireproof coatings can have a fireproof function to a certain extent and can play a role of a protection device in a fire disaster.

Description

Shock absorber for fire fighting and coating method of fire-proof layer

The application is a divisional application with the application number of 201710427616.0, application date 2017-06-08, and the title of 'shock-absorbing supporting device for fire fighting'.

Technical Field

The invention belongs to the field of building fire control shock absorption, and relates to a device with fire control, shock absorption and buckling prevention functions.

Background

The energy dissipation and shock absorption technology is favored by scholars at home and abroad in recent years, and the principle is that energy of an earthquake input structure is effectively consumed by adopting an additional device or a certain method. From the energy dissipation perspective, the total energy of the earthquake input structure is fixed, the more energy consumed by the energy consumption component, the smaller the energy consumed by the structure, and the smaller the earthquake response of the structure, so that the main structure can be effectively protected from being damaged in the earthquake. From a dynamic point of view, the installation of energy consuming devices into the structure increases the damping of the structure, increasing the energy dissipated by the structure. Therefore, the extensive research and application of the energy dissipation and shock absorption technology can obviously improve the seismic performance of the structure. Shock attenuation and support are in the application of building, and the fire control also is a consideration thereof, therefore, bumper shock absorber and support can high temperature resistant and fire-resistant, have the significance to shock attenuation and the use that supports itself, can improve the environment tolerance degree, reduce the product inefficacy risk that the conflagration leads to, have stronger practicality.

Disclosure of Invention

In order to enable the traditional buckling-restrained brace and the traditional shock absorber to have certain high-temperature-resistant and fire-resistant capabilities and enhance the fireproof function of the buckling-restrained brace and the shock absorber, the invention provides the following technical scheme: a shock attenuation strutting arrangement for fire control, including buckling restrained brace and bumper shock absorber, buckling restrained brace, bumper shock absorber's surface have fire protection coating.

The buckling restrained brace comprises an energy consumption inner core, a baffle, a connecting plate and a restraining outer sleeve, wherein the restraining outer sleeve is covered on the periphery of the energy consumption inner core, the restraining outer sleeve extends outwards from two end parts in the axial direction of the energy consumption inner core and is connected onto the connecting plate through the baffle, the restraining outer sleeve is provided with a group of parallel inner walls which are opposite and parallel to each other, the energy consumption inner core is parallel to the energy consumption outer sleeve, and a first torsion anti-instability device is arranged in a space between one end part of the energy consumption inner core, which is covered inside the restraining outer sleeve, and the inner wall of the restraining outer sleeve corresponding to; a second torsion anti-instability device is arranged in a space between the other end of the energy consumption inner core and the inner wall of the constraint outer sleeve corresponding to the end; the first torsion instability preventing device comprises a torsion spring, a limiting clamp and a guide iron rod, wherein the guide iron rod penetrates through the energy consumption inner core in the direction perpendicular to the axis of the energy consumption inner core and is fixed on the energy consumption inner core, two sides of the iron core exposed in the space are covered and connected with the torsion spring by the torsion spring, and the spring force arms connected with the torsion spring body are limited on the upper side and the lower side of a torsion plane formed when the torsion spring is twisted by the limiting clamp respectively; the second torsion instability-preventing device comprises a steel plate, the steel plate with a rack, a gear, a vortex spring and a support frame, wherein the steel plate is connected with the other end of the energy-consuming inner core, the two steel plates with the racks are symmetrically fixed on two side faces of the steel plate respectively, the gear meshed with the rack is installed between the steel plate with the racks and the inner wall of the relative and parallel constraint outer sleeve, the two vortex springs are limited on the upper side and the lower side of the gear, and the gear and the vortex spring are fixed between the steel plate with the racks and the inner wall of the relative and parallel constraint outer sleeve by the support frame extending out of the parallel inner wall.

The shock absorber comprises a sliding shock absorber, a spring shock absorber and a connecting piece for connecting the sliding shock absorber and the spring shock absorber, wherein the connecting piece starts the spring shock absorber when the sliding shock absorber stops moving.

The sliding damper comprises a first steel plate group and a second steel plate group; the first steel plate group consists of two parallel steel plates, wedge containing holes which enable the wedges to move along the telescopic direction of springs connecting the two wedges are symmetrically arranged on the two steel plates in a penetrating manner, and the wedges connected by the springs are positioned in the wedge containing holes; the second steel plate group consists of two parallel steel plates, the distance between the two steel plates allows the first steel plate group to slide along the inner wall of the second steel plate, the two steel plates are symmetrically provided with wedge fixing holes through which the wedges are ejected, and an axle hole is arranged behind the wedge fixing holes along the sliding direction.

The spring shock absorber comprises an outer sleeve and an inner cylinder; the outer sleeve is a horizontally placed hollow cylinder, one side bottom surface of the outer sleeve is not closed, the inner cylinder is a horizontally placed hollow cylinder with the diameter smaller than that of the outer sleeve, the bottom surface of one side of the inner cylinder is not closed, the inner cylinder is placed in the outer sleeve from the non-closed bottom surface of the inner cylinder to the closed bottom surface of the outer sleeve, a distance is reserved between the non-closed bottom surface of the inner cylinder and the closed bottom surface of the outer sleeve, and a spring is arranged between the closed surface of the inner cylinder and the closed surface of the outer sleeve.

The connecting piece comprises a steel arm, a lifting arm and a steel column, and the second steel plate group is connected to the outer wall of the closed bottom surface of the outer sleeve; a fixed shaft is fixed on one side of the wedge containing hole of at least one steel plate of the first steel plate group, which is far away from the second steel plate group, two steel arms are connected to the fixed shaft to form an L-shaped steel arm, a shaft is installed in a shaft hole of the second steel plate group, the other two steel arms are connected to the shaft to form the L-shaped steel arm, the two steel arms are extended at the joint of the shafts and connected to the lifting steel arm, and the lifting steel arm is provided with a steel column; the two L-shaped steel arms are connected by a shaft to form a diamond movable frame; the steel column is movably inserted into the inner cylinder through the outer sleeve and the limiting hole in the side face of the inner cylinder, and when the steel column is inserted into the inner cylinder, the steel column divides the spring.

The paint of the fireproof coating is prepared from the following raw materials in parts by weight:

acrylic resin 40

Ammonium polyphosphate 13

Melamine 10

Pentaerythritol 6

Titanium dioxide 4

Acetone 7

Sodium hexametaphosphate 1

Sepiolite 5

Nano magnesium hydroxide 3

Antimony trioxide 3

Tin oxide 3

Zinc borate 4

And (3) dimethyl silicone oil 1.

Has the advantages that: in the above scheme, the surface of buckling restrained brace, bumper shock absorber has fire protection coating, can be so that buckling restrained brace, bumper shock absorber can have certain high temperature resistant and fire-resistant ability to fire protection coating can have the fire prevention function to a certain extent, can play protection device's effect in the conflagration.

The torsion anti-instability device of the buckling-restrained brace disperses the axial load bearing of the energy-consuming inner core in a torsion plane for bearing, and the torsion anti-instability device comprises two torsion anti-instability devices which are respectively positioned at two end parts of the energy-consuming inner core, and the torsion plane is formed in the space near two terminals of the energy-consuming inner core, so that the requirement on the correction of the energy-consuming inner core is stronger, and the two positions are held, the correction can be started at the source, the deformation transmission is not caused as much as possible, the deformation interval can be further reduced, and the deformation restraining capability is stronger. The two torsion instability prevention devices are different in structure, one torsion force of the torsion spring is used, and the other torsion force of the vortex spring is used, so that on one hand, the energy consumption burden of the energy-consuming inner core is greatly reduced, the instability of the inner core is reduced, the replacement frequency of the inner core is reduced, and the maintenance cost is reduced; on the other hand, the spring becomes an energy consumption main body, the torsion force of the torsion spring is fully utilized, the load bearing capacity is stronger, and the spring is not easy to destabilize; on the other hand, the deformation of the inner core can be corrected by using the torsional force while the spring consumes energy, so that the service life of the energy-consuming inner core is further prolonged, and the support has self-resetting capability. In particular, in the second torsion unstability preventing device, a gear is mounted at the end of a support, racks meshed with the gear are mounted on two side surfaces of an inner core, two scroll springs limited on the parallel inner walls are directly fixed (contactingly fixed) on the upper side and the lower side of the gear, and the gear and the scroll springs are fixed between the steel plate with the racks and the inner wall of the opposite and parallel constraint outer sleeve by a support frame extending from the parallel inner walls. The axial load bearing of the energy-consuming inner core is dispersed on the spring vortex plane to bear, so that on one hand, the energy-consuming burden of the energy-consuming inner core is greatly reduced, the inner core instability is reduced, the replacement frequency of the inner core is reduced, and the maintenance cost is reduced; on the other hand, the spring becomes an energy consumption main body, the torsion force of the vortex spring is fully utilized, the load bearing capacity is stronger, and the spring is not easy to destabilize; on the other hand, the deformation of the inner core can be corrected by using the torsional force while the energy consumption of the vortex rotation spring is realized, the service time of the energy consumption inner core is further prolonged, and the self-resetting capability of the support is realized. More importantly, in order to obtain larger torsional force, the vortex spring is used, but the vortex spring can cause that the sensitivity to vibration is reduced, in order to make up for the defect, the meshing of the symmetrical gears and the racks on two sides is used for consuming energy during initial vibration, when the vibration strength reaches the working strength of the vortex spring, the vortex spring provides large torsional force to resist deformation and enhance the instability prevention capability, and by means of the measure, the composite instability prevention device with higher sensitivity can still be obtained by using the strong torsional force of the vortex spring on the premise of not sacrificing the vibration sensitivity.

The shock absorber can perform adaptive energy consumption no matter the shock absorber encounters vibration with smaller or larger intensity, so that the connecting piece is utilized to ensure that the sliding friction energy consumption is performed in the small shock, the spring energy consumption is performed in the large shock, and the connecting piece is selected according to the shock intensity adaptability, thereby greatly widening the application range of the shock absorber.

Drawings

Fig. 1 is an appearance view of the buckling restrained brace.

Fig. 2 is a schematic view of the composition of the energy dissipation core of the buckling restrained brace.

FIG. 3 is a cross-sectional position view of the buckling restrained brace.

Fig. 4 is an exploded view of the outer restraining sleeve of the buckling restrained brace.

Fig. 5 is a cross-sectional view taken at 1-1 of fig. 3.

Fig. 6 is a cross-sectional view taken at 2-2 of fig. 3.

Fig. 7 is a cross-sectional view of 3-3 of fig. 3.

Fig. 8 is a cross-sectional view 4-4 of fig. 3.

FIG. 9 is a view of the gear and scroll spring assembly of the buckling restrained brace.

FIG. 10 is an assembly effect view of the damper.

Fig. 11 is a view of the C-D configuration of fig. 10.

FIG. 12 is a schematic view of a wedge steel plate with a triangular shape for a shock absorber.

FIG. 13 is a C-D connection section view of the shock absorber.

Wherein:

1-1, an energy consumption inner core, 1-2, a torsion spring, 1-3, a guide iron bar, 1-4, a limit clamp, 1-5, a baffle, 1-6, a connecting plate, 1-7, a constraint outer sleeve, 1-8, a steel plate, 1-9, a steel plate with a rack, 1-10, a parallel inner wall, 1-11, a rack, 1-12, a gear, 1-13, a vortex spring, 1-14, a cross frame, 1-15, a vertical shaft and 1-16, a limit clamp groove.

2-1, 2-2, 2-3, 2-4, 2-5, 2-6, 2-7, 2-8, 2-9, 2-10, 2-11, 2-12, 2-13, 2-14, fixed shaft, 2-15, 2-16, connecting plate, 17, U-shaped groove.

Detailed Description

Example (b): a shock attenuation strutting arrangement for fire control, including buckling restrained brace and bumper shock absorber, buckling restrained brace, bumper shock absorber's surface have fire protection coating.

The buckling-restrained brace comprises an energy-consuming inner core 1-1, baffles 1-5, connecting plates 1-6 and a restraining outer sleeve 1-7, wherein the restraining outer sleeve 1-7 is covered on the periphery of the energy-consuming inner core 1-1, two end parts in the axial direction of the energy-consuming inner core 1-1 extend outwards to form the restraining outer sleeve 1-7, the restraining outer sleeve 1-7 is connected to the connecting plates 1-6 through the baffles 1-5, the restraining outer sleeve 1-7 is provided with a group of opposite and parallel inner walls 1-10, the energy-consuming inner core 1-1 is parallel to the inner walls, the energy-consuming inner core 1-1 is covered on one end part in the restraining outer sleeve 1-7 in the axial direction of the energy-consuming inner core and a first torsion instability-prevention device is arranged in a space between; and a second torsion instability preventing device is arranged in a space between the other end part of the energy consumption inner core 1-1 and the inner wall of the constraint outer sleeve 1-7 corresponding to the end part. The energy dissipation inner core of the part is provided with two side surfaces, each side surface corresponds to the inner wall of the constraint outer sleeve 1-7, namely the parallel inner walls 1-10, and torsion anti-instability devices (a first torsion anti-instability device and a second torsion anti-instability device) are arranged between the two parallel inner walls 1-10 and the two side surfaces of the energy dissipation inner core 1-1. The end part is 3cm-10cm from the tail end of the energy dissipation core 1-1, and can be smaller or larger. In practice, we find that, the closer to the starting position of load transmission, the more corresponding to the ending position of the real position, that is, the space near the two terminals of the energy-consuming inner core 1-1, the torsion spring 1-2 is used to form a torsion plane, the stronger the correction requirement on the energy-consuming inner core 1-1 is required, and holding the two positions can start correction at the source, and the deformation transmission is not caused as much as possible, so that the deformation interval can be further reduced, and the deformation inhibiting capability is stronger, therefore, the embodiment selects two torsion instability prevention devices to be respectively installed at the two ends of the energy-consuming inner core 1-1.

In this embodiment, the first torsion instability prevention device comprises a torsion spring 1-2, a limiting clamp 1-4 and a guiding iron rod 1-3, wherein the guiding iron rod 1-3 penetrates through the energy consumption inner core 1-1 (from top to bottom, the penetrating hole is located at one end of the energy consumption inner core 1-1) in the direction perpendicular to the axis of the energy consumption inner core 1-1 and is fixed on the energy consumption inner core 1-1, two sides of the iron core exposed in the space are covered by the torsion spring 1-2, and the spring force arms connecting the torsion spring 1-2 are limited on the upper side and the lower side of a torsion plane formed when the torsion spring 1-2 is twisted by the limiting clamp 1-4 respectively. In this embodiment, the end of the dissipative core 1-1 on the first torsion destabilizing prevention device side is directly connected to the baffle 1-5 and the connecting plates 1-6 are connected by the baffle 1-5.

In this embodiment, the energy dissipation inner core 1-1 is a rectangular body, and is inserted into a substantially central position inside the restraining outer sleeve 1-7 in the shape of a rectangular long cylinder, the iron rod penetrates through the energy dissipation inner core 1-1 and is bilaterally symmetrical, and the installation position of the torsion spring 1-2 and the limiting position of the spring arm thereof are symmetrical with the penetrated energy dissipation inner core 1-1 as the center. The central symmetry sets up for the reaction force of two planes of torsion is more unanimous, and is better to deformation correction, and twists reverse the equal effect of plane power consumption. Furthermore, generally speaking, the energy dissipating core 1-1 will have a portion outside the constraining outer sleeve 1-7, which is directly exposed, and thus weaker and more vulnerable to damage than the energy dissipating core inside the constraining outer sleeve 1-7 because it is not constrained and supported. The torsion instability preventing device is used, the linear displacement of the energy consumption inner core is converted into angular displacement by the limiting combination of the guide iron rod 1-3 and the torsion spring 1-2, and the torsion instability preventing device is positioned near the end (close to the exposed energy consumption inner core part), so that the part of the guide iron rod 1-3, which is positioned near the exposed energy consumption inner core 1-1, can form a frame, has a certain supporting function, and is subjected to the torsion force of the torsion spring 1-2, and on the basis of supporting, the movement (swinging and swinging) of the exposed part under the action of load is greatly reduced, so that the range of a connecting area can be shortened, and the purpose of instability prevention is achieved by the scheme.

In the embodiment, the second torsion unstability-preventing device comprises steel plates 1-8, steel plates 1-9 with racks, gears 1-12, vortex springs 1-13 and supporting frames, in the embodiment, an energy consumption inner core 1-1 on the side of the second torsion unstability-preventing device is not directly connected with a baffle plate 1-5, the energy consumption inner core 1-1 is connected with the steel plates 1-8, the steel plates 1-8 are connected with the baffle plate 1-5, and the baffle plate 1-5 is connected with a connecting plate 1-6. That is, the steel plate 1-8 is connected with the other end of the energy dissipation core 1-1, the two steel plates 1-8 with racks are respectively and symmetrically fixed on two side surfaces (the side surfaces are parallel surfaces parallel to the parallel inner walls, as a preferred scheme, the steel plates 1-8 and the steel plates 1-9 with racks are provided with bolt holes, the steel plates 1-8 and the steel plates 1-9 with racks are tightly connected by bolts, a gear 1-12 meshed with the rack 1-11 is arranged between each steel plate 1-9 with racks and the inner wall of the constraint outer sleeve 1-7 opposite and parallel to the steel plate 1-9 with racks, two vortex springs 1-13 limited on the parallel inner walls are directly fixed on the upper and lower sides of the gear 1-12, and the gear 1-12 and the vortex springs 1-13 are fixed on the rack by a support frame extending from the parallel inner walls The supporting frame comprises two cross frames 1-14 fixed on the parallel inner walls and respectively positioned above two vortex springs 1-13, and a vertical shaft 1-15 penetrating through the cross frames 1-14, the vortex springs 1-13 and gears 1-12, wherein the vortex springs 1-13 are limited on the parallel inner walls 1-10 by limiting clamping grooves 1-16. Therefore, the scheme takes the energy-consuming inner core 1-1 as a central line, the gears 1-12, the vortex springs 1-13 and the racks 1-11 on two sides are symmetrically arranged, and the centers of the gears are symmetrically arranged, so that the reaction forces of two vortex planes are more consistent, and the effects on deformation correction and vortex plane energy consumption are better. In this embodiment, the space near the entire dissipative core 1-1 has the possibility of installing gear springs, however, in practice, we find that, the closer to the starting position of the load transmission, the corresponding to the ending position of the starting position, i.e. the space near the two terminals of the dissipative core 1-1, the stronger the need for correcting the dissipative core 1-1 is due to the use of the volute springs 1-13 to form a torsion plane, and holding the two positions can start correction at the source, and the deformation transmission is not allowed as much as possible, so that the deformation interval can be further reduced, and the deformation inhibiting capability is stronger, therefore, we choose to use the connecting steel plates 1-8 to the two ends of the dissipative core 1-1, and install the racks 1-11 on the connecting steel plates to form the above scheme. Furthermore, generally speaking, the dissipative core 1-1 will have a portion outside the constraining outer sleeve 1-7 which, being directly exposed and not constrained and supported, is weaker and more vulnerable to breakage than the dissipative core 1-1 inside the constraining outer sleeve 1-7. The steel plate 1-8, the gear 1-12, the rack 1-11 and the vortex spring 1-13 are combined in a limiting mode, the part exposed out of the restraint outer sleeve 1-7 is used, the steel plate 1-8 replaces the energy consumption inner core 1-7, and the steel plate 1-9 with the rack is fixed with the steel plate 1-8 in a bolt fixing connection mode, so that the rack 1-11 is fixed, although the part is not covered by the energy consumption inner core 1-1, the strength of the exposed part is enhanced to a certain degree; the vortex springs 1-13 enable linear displacement of the energy dissipation inner core 1-1 to be converted into angular displacement, and the energy dissipation inner core is located near the end portion (close to the exposed steel plate portion), so that the limiting vortex springs 1-13, the meshed gears 1-12, the racks 1-11 and the support frame can form a frame on the exposed steel plate, a certain supporting effect is achieved, the exposed portion is greatly reduced in movement (shaking and swinging) under the action of load on the basis of supporting due to the torsional force of the vortex springs 1-13, and the range of a connection area can be shortened.

In this embodiment, the torsion spring and/or the scroll spring are made of a shape memory alloy. The torsion spring is composed of a spiral spring and force arms connected to two end parts of the spiral spring, the vortex spring is composed of a vortex spring body and force arms connected to two end parts of the vortex spring, and the superelasticity characteristic of the shape memory alloy has many advantages compared with other common metal materials: firstly, the superelasticity fatigue property of the shape memory alloy is good, and other materials are inevitably damaged in circulation, so that the service life is influenced; secondly, the shape memory alloy has a large recoverable strain value, which is difficult to realize by common metal materials; finally, because the austenite phase has a higher elastic modulus than the martensite phase, the shape memory alloy has an increased elastic modulus with increasing temperature (as opposed to common metals), which allows it to maintain a higher elastic modulus at higher temperatures. Thus, the spring portion of the device can be made of a shape memory alloy.

In the buckling restrained brace described in this embodiment, under the action of an earthquake, the energy-consuming inner core receives a load transmitted from a building, and the energy-consuming inner core deforms:

in one embodiment, on the first torsion unstability-preventing device side:

the torsion spring is limited on the upper side and the lower side of a torsion plane formed when the torsion spring is twisted, and the torsion force of the torsion spring drives the energy consumption inner core to move in a direction opposite to the deformation direction, so that the shape and the position of the energy consumption inner core return to the natural state. Therefore, in order to reduce the effect of vibration on the structure, the buckling-restrained brace with the double-torsion buckling-restrained device in each case is subjected to buckling-restrained reinforcement design on the end part aiming at the traditional buckling-restrained brace with the double-torsion buckling-restrained device, and the damage of the inner core is relieved. And in case of earthquake, the working capacity of the support is improved. The anti-buckling support energy dissipation inner core with the double-torsion anti-instability device, the torsion spring and the limiting clamp on the outer sleeve work together, so that the anti-buckling support energy dissipation inner core has a certain self-resetting function, and damage of the inner core is relieved. The torsion spring belongs to the group of helical springs, the ends of which are fixed to the other components, which, when they rotate around the spring centre, pull them back to the initial position, generating a torque or rotational force. The torsion spring can store and release angular energy or statically hold a device by rotating a moment arm about the central axis of the spring body. The limiting clamp can limit the position of the torsion spring, can play a role in fixing the spring, and can also play a role in limiting a bonding material and an inner core. The device is simple and easy to operate, can be connected in an assembling mode, is convenient to disassemble, and facilitates repair and daily maintenance after an earthquake. Under the action of earthquake, the energy-consuming inner core can be subjected to load transmitted from a building, the inner core can deform, the inner core drives the torsion spring to deform, and torque is generated in a plane, so that the energy-consuming inner core has higher torque. Because the existence of the inner core limiting clamping groove, the generated torsion can drive the inner core to move, so that the inner core returns to the original position, and the device has a self-resetting function. When the structure is subjected to earthquake action, the end part is in a pressed or pulled state, and self-resetting can be realized through the restoring force of the torsion spring, so that the pressed deformation of the inner core is reduced, the energy consumption capability is improved, the integral stability can be ensured after the inner core is yielded, and the normal work of the support is not influenced.

In one embodiment, on the second torsion unstability-preventing device side:

under the action of an earthquake, the energy-consuming inner core deforms, the deformation of the energy-consuming inner core causes the gears on two sides of the energy-consuming inner core to be meshed with the racks on the steel plate within a certain load range, and the deformation enables the gears to drive the racks to move towards the opposite direction of the deformation of the energy-consuming inner core, so that the shape and the position of the energy-consuming inner core connected with the gears are restored towards the natural state; when the load range is exceeded (the restoring force of the gear cannot restore the energy consumption inner core), the vortex springs fixed on the upper side and the lower side of the gear are deformed due to the deformation of the energy consumption inner core and generate torque in a plane, the vortex springs are limited on the parallel inner wall, the restoring force generated by the vortex springs enables the gear to drive the rack to move towards the opposite direction of the deformation of the energy consumption inner core, and therefore the shape and the position of the energy consumption inner core connected with the gear are restored towards the natural state. Therefore, the main purpose of the present disclosure is to provide a self-resetting device for alleviating the impact of vibration on the structure, and to solve the problem of damage to the inner core, in view of the design of the conventional buckling-restrained brace. Under the action of earthquake, the supporting capability is improved. The anti-buckling support energy dissipation inner core with the double-torsion anti-buckling device, the gear, the vortex spring and the limiting clamp on the outer sleeve work together to convert integrally generated linear displacement into angular displacement, and the anti-buckling support energy dissipation inner core with the double-torsion anti-buckling device has a certain self-resetting function and slows down damage of the inner core. The problem that the inner core stroke cannot be met due to the fact that the spring corner is too small is solved through the gear.

After the vortex spring is deformed, the material is subjected to bending moment to generate bending elastic deformation, so that the spring generates torsion on the plane of the spring. The deformation angle is in direct proportion to the torque, has high torque, applies multi-angle torsion moment to a mechanism doing work for a long time, and has the characteristic of low fatigue. The utility model discloses simple easy operation can be connected through the mode of equipment, and it is convenient and convenient to dismantle and repair and daily maintenance after the shake.

In this embodiment, the spring is connected through the riveting mode with the gear, guarantees that the spring can rotate with the gear together.

The implementation method comprises the following steps: under the action of earthquake, the inner core can bear load and deform, the inner core can drive the vortex spring to deform, torque is generated in a plane, and high torque is achieved. Because the existence of the inner core limiting clamping groove, the generated torsion can drive the inner core to move, so that the inner core returns to the original position, and the device has a self-resetting function.

When the structure receives earthquake action, the end part can realize self-resetting through the restoring force of the vortex spring no matter the end part is pressed or pulled, the pressed deformation of the inner core is reduced, the energy consumption capability is improved, the integral stability can be ensured after the inner core is yielded, and the anti-seismic performance and the survival capability of the structure are improved.

In this embodiment, the shock absorber is a stepped shock absorber, which includes a sliding shock absorber, a spring shock absorber, and a connecting member of the sliding shock absorber and the spring shock absorber, the connecting member activating the spring shock absorber when the movement of the sliding shock absorber stops. In the prior art, a damper is generally used for achieving the shock absorption effect of a building, however, the damper is influenced by shock absorption strength, and the requirement of spring stiffness causes the damper to consume energy to counteract a large deformation effect, so that the damper with the requirement of stiffness is insensitive to a small deformation effect, but small shock still exists, and the part of energy should be consumed, so that the damper can perform adaptive energy consumption no matter the damper encounters shock with smaller or larger strength, therefore, a connecting piece is used, so that sliding friction energy consumption is realized in small shock, the spring energy consumption is realized in large shock, and the connecting piece is adaptively selected according to the shock strength, so that the application range of the damper is greatly widened.

In this embodiment, the sliding damper includes a first steel plate set and a second steel plate set.

The sliding damper comprises a first steel plate group 2-1 and a second steel plate group 2-2.

The first steel plate group 2-1 is composed of two parallel steel plates, wedge accommodating holes 2-5 which enable the wedges 2-3 to move along the extension direction of springs 2-4 connecting the two wedges 2-3 are symmetrically arranged on the two steel plates in a penetrating mode, and the wedges 2-3 connected by the springs 2-4 are located in the wedge accommodating holes 2-5.

The second steel plate group 2-2 is composed of two parallel steel plates, the distance between the two steel plates allows the first steel plate group 2-1 to slide along the inner wall of the second steel plate, the two steel plates are symmetrically penetrated with wedge fixing holes 2-6 for ejecting the wedges 2-3, and an axle hole 2-7 is arranged behind the wedge fixing holes 2-6 along the sliding direction. This scheme provides a slip bumper shock absorber, uses the embedded slip of two sets of parallel steel sheets to use the spacing mode of wedge, stop sliding when sliding strength is unsuitable to support current seismic strength, provide one-level shock attenuation.

In this embodiment, the spring damper comprises an outer sleeve 2-8, an inner sleeve 2-9; the outer sleeve 2-8 is a horizontally placed hollow cylinder, one side of the outer sleeve is not closed, the inner cylinder 2-9 is a horizontally placed hollow cylinder with the diameter smaller than that of the outer sleeve 2-8, the bottom surface of one side of the inner cylinder is not closed, the inner cylinder 2-9 is placed in the outer sleeve 2-8 from the non-closed bottom surface of the inner cylinder 2-9 to the closed bottom surface of the outer sleeve 2-8, a distance is reserved between the non-closed bottom surface of the inner cylinder 2-9 and the closed bottom surface of the outer sleeve 2-8, and a spring 2-10 is arranged between the closed surface of the inner cylinder 2-9 and the closed surface of the outer sleeve 2. This scheme provides a spring damper, and aim at provides the secondary vibration.

In this embodiment, the connecting member comprises a steel arm 2-11, a lifting arm 2-12 and a steel column 2-13, and the second steel plate group 2-2 is connected to the outer wall of the closed bottom surface of the outer sleeve 2-8; a fixed shaft 2-14 is fixed on one side of the wedge containing hole 2-5 of at least one steel plate of the first steel plate group 2-1, which is far away from the second steel plate group 2-2, two steel arms 2-11 are connected to the fixed shaft to form an L-shaped steel arm 2-11, a shaft is installed in a shaft hole 2-7 of the second steel plate group 2-2, the other two steel arms 2-11 are connected to the shaft to form an L-shaped steel arm 2-11, the two steel arms 2-11 are extended due to the connection position of the shafts and are connected to the lifting steel arms 2-11, and a steel column 2-13 is installed on the lifting steel arm 2-11; the two L-shaped steel arms 2-11 are connected by a shaft to form a diamond movable frame; the steel column 2-13 is movably inserted into the inner cylinder 2-9 through the outer sleeve 2-8 and a limiting hole in the side surface of the inner cylinder 2-9, and when the steel column 2-13 is inserted into the inner cylinder 2-9, the steel column 2-13 divides the spring 2-10. This scheme provides a connecting piece, connects one-level and second grade shock attenuation to by the connecting piece after one-level shock attenuation became invalid, the automatic start second grade shock attenuation, thereby obtain the bumper shock absorber that the automation of a wide range carries out adaptability shock attenuation according to intensity of vibration and selects.

One end of the first steel plate, which is far away from the second steel plate, is connected with a baffle plate 2-15, the baffle plate 2-15 is connected with a connecting plate 2-16, the closed bottom surface of the inner cylinder 2-9 is connected with the baffle plate 2-15, and the baffle plate 2-15 is connected with the connecting plate 2-16.

In the embodiment, the spring between the closed surface of the inner cylinder 2-9 and the closed surface of the outer sleeve 2-8 is prepared by memory alloy, and the part of the spring divided by the steel column 2-13 is provided with a notch; when the rhombic movable frame moves to drive the steel column 2-13 to move upwards, the steel column is separated from the limiting hole on the inner cylinder 2-9 when moving, and is limited between the inner cylinder 2-9 and the outer cylinder 2-8 by the limiting hole of the outer cylinder 2-8, the lifting arm 2-12 is connected with an L-shaped steel arm 2-11 at an angle, so that the lifting arm 2-12 is parallel to the side surfaces of the outer cylinder 2-8 and the inner cylinder 2-9, and the steel column 2-13 is vertically inserted.

The steel column is spacing between inner tube and outer sleeve, and the steel column is pegged graft perpendicularly, the purpose is for it is when maintaining, resume the position in the inner tube more easily, if directly deviate from the overcoat, not only occupy great space, and be difficult to reply, on the other hand, select the spring to be memory alloy spring, the purpose is also for utilizing memory alloy's superstrong restoring force, make after the shock attenuation, the spring can accurately resume to initial condition and position, make the steel column when inserting the inner tube, divide the spring smoothly. The superelastic properties of shape memory alloys have many advantages over other common metallic materials: firstly, the superelasticity fatigue property of the shape memory alloy is good, and other materials are inevitably damaged in circulation, so that the service life is influenced; secondly, the shape memory alloy has a large recoverable strain value, which is difficult to realize by common metal materials; finally, because the austenite modulus of elasticity is greater than the martensite modulus of elasticity, the shape memory alloy modulus of elasticity increases with increasing temperature (as opposed to common metals), which allows it to maintain a high modulus of elasticity at higher temperatures. Thus, the spring portion of the device can be made of a shape memory alloy.

The use method of the graded shock absorber comprises the following steps:

the two steel plates of the first steel plate group 2-1 slide along the inner wall of the second steel plate group 2-2 until the wedge 2-3 contacts with the end of the first steel plate group 2-1 to compress the spring to move the wedge 2-3 connected with the spring into the containing hole, the wedge 2-3 slides along with the first steel plate group 2-1 until the wedge is popped out from the wedge fixing hole 2-6 of the second steel plate group 2-2, the first steel plate group 2-1 is fixed and does not slide any more, the fixed shaft 2-14 on the first steel plate group 2-1 slides along with the first steel plate group 2-1, and in the sliding process, the L-shaped steel arm 2-11 connected with the fixed shaft is gradually deformed and causes the other L-shaped steel arm 11 connected with the fixed shaft to be gradually deformed, the L-shaped steel arm 2-11 is deformed to drive the lifting arm 2-12 to lift upwards, the lifting arm 2-12 drives the steel column 2-13 connected with the lifting arm to lift upwards, so that the divided springs are connected.

The lifting arm 2-12 is parallel to the side surfaces of the outer sleeve 2-8 and the inner sleeve 2-9, the steel column 2-13 is vertically inserted, and when the lifting arm 2-12 is lifted upwards, the steel column 2-13 is driven to be separated from the limiting hole on the inner sleeve 2-9 and limited between the inner sleeve 2-9 and the outer sleeve 2-8 by the limiting hole of the outer sleeve 2-8.

The wedge 2-3 is extruded to be retracted from the wedge fixing hole 2-6, the first steel plate group 2-1 is pulled outwards and slides along the inner wall of the second steel plate group 2-2, the fixing shaft 2-14 on the first steel plate group 2-1 slides outwards along the first steel plate group 2-1, in the sliding process, the L-shaped steel arm 2-11 connected to the first steel plate group gradually deforms, the other L-shaped steel arm 2-11 connected to the first steel plate group gradually deforms, the L-shaped steel arm 2-11 deforms to drive the lifting arm 2-12 to fall downwards, the lifting arm 2-12 drives the steel column 2-13 connected to the lifting arm to fall downwards, and the steel column 2-13 is divided into the springs 2-10 made of the memory alloy by the notches of the springs 2-10.

In this embodiment, the fire-retardant coating may be any one of the prior arts, and in this embodiment, a fire-retardant coating is listed: the paint of the fireproof coating is prepared from the following raw materials in parts by weight:

acrylic resin 40

Ammonium polyphosphate 13

Melamine 10

Pentaerythritol 6

Titanium dioxide 4

Acetone 7

Sodium hexametaphosphate 1

Sepiolite 5

Nano magnesium hydroxide 3

Antimony trioxide 3

Tin oxide 3

Zinc borate 4

Dimethicone oil 1

The raw materials are crushed, stirred and mixed to obtain the coating, the coating forms a coating on the surfaces of the buckling-restrained brace and the shock absorber, the thickness of the coating is 2mm, and the measured fire-resistant limit time is 63 minutes. The coating of the fire-resistant coating has certain fire resistance. The coating is coated on the surfaces of the buckling-restrained brace and the shock absorber, so that the fire resistance of the coating is effectively improved.

The above description is only for the purpose of creating a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the inventive concept of the present invention within the technical scope of the present invention.

Claims

1. A shock absorber for fire fighting, characterized in that the surface of the shock absorber is provided with a fire retardant coating, the shock absorber comprises a sliding shock absorber, a spring shock absorber and a connecting piece connecting the sliding shock absorber and the spring shock absorber, the connecting piece starts the spring shock absorber when the movement of the sliding shock absorber stops, the sliding shock absorber comprises a first steel plate group (2-1) and a second steel plate group (2-2); the first steel plate group (2-1) consists of two parallel steel plates, wedge containing holes (2-5) which enable the wedges (2-3) to move along the extension direction of springs (2-4) which are connected with the two wedges (2-3) are symmetrically arranged on the two steel plates in a penetrating manner, and the wedges (2-3) connected by the springs (2-4) are positioned in the wedge containing holes (2-5); the second steel plate group (2-2) is composed of two parallel steel plates, the distance between the two steel plates allows the first steel plate group (2-1) to slide along the inner wall of the second steel plate, the two steel plates are symmetrically provided with wedge fixing holes (2-6) which enable the wedges (2-3) to be ejected, and shaft holes (2-7) are formed behind the wedge fixing holes (2-6) along the sliding direction.

2. A shock absorber for fire fighting as defined in claim 1, wherein: the paint of the fireproof coating is prepared from the following raw materials in parts by weight:

acrylic resin 40

Ammonium polyphosphate 13

Melamine 10

Pentaerythritol 6

Titanium dioxide 4

Acetone 7

Sodium hexametaphosphate 1

Sepiolite 5

Nano magnesium hydroxide 3

Antimony trioxide 3

Tin oxide 3

Zinc borate 4

And (3) dimethyl silicone oil 1.

3. A method of applying a fire retardant coating layer of a shock absorber for fire fighting according to claim 2, wherein the raw materials are pulverized, stirred and mixed to obtain a coating material, the coating material forms a coating layer on the surface of the shock absorber, the coating layer has a thickness of 2mm, and the measured fire endurance time is 63 minutes.