CN110374206B - Shape memory alloy rope stair sliding support - Google Patents

Shape memory alloy rope stair sliding support Download PDF

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Publication number
CN110374206B
CN110374206B CN201910679326.4A CN201910679326A CN110374206B CN 110374206 B CN110374206 B CN 110374206B CN 201910679326 A CN201910679326 A CN 201910679326A CN 110374206 B CN110374206 B CN 110374206B
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China
Prior art keywords
shape memory
memory alloy
heating
stair
plate
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CN201910679326.4A
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CN110374206A (en
Inventor
肖华宁
宋廷苏
黄剑涛
王林建
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Shenzhen Academy Of Disaster Prevention And Reduction
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Shenzhen Academy Of Disaster Prevention And Reduction
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/36Bearings or like supports allowing movement
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04FFINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F11/00Stairways, ramps, or like structures; Balustrades; Handrails
    • E04F11/02Stairways; Layouts thereof

Abstract

The invention discloses a shape memory alloy rope stair sliding support which comprises an upper connecting plate, a lower steel plate and a support, wherein a plurality of connecting rings are fixedly connected to the side edge of the upper side surface of the lower steel plate and the side edge of the lower side surface of the upper connecting plate, two shape memory alloy ropes are arranged in the connecting rings in a penetrating mode, and the two shape memory alloy ropes sequentially penetrate through the connecting rings on the upper connecting plate and the lower steel plate to form a cross net-shaped structure between the upper connecting plate and the lower steel plate. According to the shape memory alloy rope stair sliding support, the upper connecting plate and the lower steel plate can be effectively connected in a matched mode through the arrangement of the connecting ring and the shape memory alloy rope, so that a limiting effect on the upper connecting plate and the lower steel plate is achieved, and the problem of unsafe influence caused by excessive sliding of the support in the prior art can be effectively avoided.

Description

Shape memory alloy rope stair sliding support
Technical Field
The invention relates to a stair sliding support, in particular to a shape memory alloy rope stair sliding support.
Background
In the traditional stair design, structural engineers in China often omit modeling calculation of stair components in structural calculation for a long time, and the earthquake resistance of the stair components is not considered, and the influence of the stair components on the overall earthquake resistance of the structure is not considered. Wenchuan seismic surveys have found that stairwells of structures (especially frame structures) are severely damaged. The stair is a part of the integral structure, so that the integral power performance of the structure is inevitably influenced, and the change of the integral power performance of the structure inevitably influences the safety of the stair. Therefore, the structural whole earthquake-resistant analysis and calculation does not consider the influence of stairs on the structural whole performance, and the structural whole and stairs (cells) can be seriously damaged when an earthquake occurs.
In view of serious damages to stairwells of the structure caused by Wenchuan earthquake, the escape function of the structure is seriously affected. The building earthquake-resistant design rule GB50011-2010, 6.1.15, states that: when the stair component and the main body structure are integrally cast, the influence of the stair component on the earthquake action and the earthquake effect should be counted, and the earthquake-resistant bearing capacity of the stair component should be checked. The technical rules of high-rise building concrete structures, JGJ 3-2010, 6.1.4, prescribe: the frame structure is preferably a cast-in-situ reinforced concrete stair, and the stair structure has enough collapse resistance.
The 'shock-absorbing' measures are taken for the stairwell, the influence of the stairwell members on the rigidity of the main body structure is weakened, the stairwell and the main body structure are separated manually, and the method is a new thought for the earthquake-proof design of the stairwell. This practice has been described in various documents, and its effect has been demonstrated by calculation and experimentation and has been adopted by the national standard 11G101-2 atlas. The building earthquake-resistant design rule GB50011-2010, 6.1.15, states that: and structural measures are adopted, so that the influence of the stair component on the rigidity of the main body structure is reduced. "some standard atlas has adopted the practice of providing a sliding support between the lower end of the stair sloping and the stair beam. However, the proposed practice of 11G101-2 for the stairwell sliding support only releases the diagonal bracing effect of the stair plates, and the damage form of the stairwell is not estimated accurately, so that the stairwell sliding support has defects.
The sliding support of the stairwell used in the prior art has no limiting performance, when the stair is installed and used, the bottom of the stair is generally connected with a foundation surface through bolts, the upper part of the elastic sliding support is connected with an upper part to-be-damped structural part through bolts, a polytetrafluoroethylene plate in a lower sealing plate can freely slide on a stainless steel plate, and the to-be-damped structural part is extremely easy to generate super-designed displacement under the action of large earthquake, so that the upper part to-be-damped structural part slides down to the range of the steel plate, and the structure is greatly unsafe.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the shape memory alloy rope stair sliding support which can effectively limit a shock absorption structural member and avoid unsafe influence on the structure.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a shape memory alloy rope stair support that slides, includes upper junction plate, lower steel sheet and support, the support sets up between outside stair swash plate top and stair beam, upper junction plate and outside stair beam fixed connection, lower steel sheet is fixed on outside stair swash plate, the upper and lower both sides of support are fixedly connected with upper shrouding and lower shrouding respectively, upper junction plate and lower steel sheet are fixed respectively on upper shrouding and lower shrouding, the downside fixedly connected with polytetrafluoroethylene board of lower shrouding, polytetrafluoroethylene board laminating is placed on lower steel sheet to can slide on lower steel sheet, the equal fixedly connected with go-between of side of lower steel sheet upside and upper junction plate downside's side, a plurality of go-between is along the side evenly distributed of upper junction plate and lower steel sheet to go-between and go-between position on lower steel sheet is relative, the go-between wears to be equipped with shape memory alloy rope, and this shape memory alloy rope is equipped with two, and two bar shape memory alloy rope pass in proper order and form cross network structure between upper junction plate and lower steel sheet on the go-between.
As a further improvement of the invention, the shape memory alloy rope comprises a heating wire core and a shape memory alloy skin coated on the heating wire core, a storage battery and a control circuit are arranged in the support, the control circuit is coupled between the storage battery and the heating wire core, a stretching detector is arranged in the heating wire core and used for detecting the stretching degree of the heating wire core, the stretching detector is coupled with the control circuit, a stretching threshold value is arranged in the control circuit, and when the stretching detector detects that the stretching degree of the heating wire core exceeds the stretching threshold value, a signal is output to the control circuit, and the control circuit is communicated with the storage battery and the heating wire core.
As a further improvement of the invention, the heating wire core comprises a wire core skin and a plurality of heating columns, the wire core skin is hollow, the wire core skin is covered with the shape memory alloy skin, the plurality of heating columns are uniformly distributed in the wire core skin at intervals, the wire core skin is made of elastic rubber materials, graphene powder is filled between two adjacent heating columns so as to be electrically connected between the two adjacent heating columns, the tensile detector comprises two detection patches, the two detection patches are oppositely attached and fixed at the position of the wire core skin relative to the two heating columns, and are electrically connected with each other through the graphene powder contact, and the two detection patches are electrically connected with the control circuit through wires so as to output the resistance into the control circuit.
As a further improvement of the invention, the detection patch is an arc-shaped sheet, the curvature of the detection patch is the same as the section of the wire core skin, and the detection patch is closely attached to the inner wall of the wire core skin.
As a further improvement of the invention, the control circuit comprises a voltage stabilizing circuit and a switching tube, wherein the voltage stabilizing circuit is coupled to the storage battery to receive the voltage output by the storage battery and then convert the voltage into lower voltage output, the voltage stabilizing circuit is further coupled to the rear ground of the two detection patches, the first end of the switching tube is coupled to the storage battery, the second end of the switching tube is coupled to the rear ground of the heating column, and the control end of the switching tube is coupled between the voltage stabilizing circuit and the detection patches.
As a further improvement of the invention, the heating column is a heating resistor.
As a further improvement of the invention, the storage battery is coupled with the piezoelectric power generation piece, and the piezoelectric power generation piece is arranged on the step surface of the external stair so as to be stepped by a person to output electric energy into the storage battery.
The invention has the beneficial effects that the relative sliding action between the lower steel plate and the polytetrafluoroethylene plate can be effectively utilized through the arrangement of the upper connecting plate, the lower steel plate and the support, so that a sliding support can be effectively formed, and the upper connecting plate and the lower steel plate can be effectively combined and connected through the arrangement of the connecting ring and the shape memory alloy rope, so that the limiting action provided for the upper connecting plate and the lower steel plate is realized through the pulling action of the shape memory alloy rope, and the problem that the structural stability of the whole support is seriously influenced due to excessive sliding in the sliding process of the support can be avoided.
Drawings
FIG. 1 is an overall structure diagram of a shape memory alloy rope stair sliding support of the present invention;
FIG. 2 is an overall block diagram of the shape memory alloy cord of FIG. 1;
fig. 3 is a circuit diagram of a control circuit.
Detailed Description
The invention will be further described in detail with reference to examples of embodiments shown in the drawings.
Referring to fig. 1 to 3, a shape memory alloy rope stair sliding support of this embodiment comprises an upper connecting plate 1, a lower steel plate 2 and a support 3, wherein the support 3 is arranged between an upper part of an external stair sloping plate and a stair beam, the upper connecting plate 1 is fixedly connected with the external stair beam, the lower steel plate 2 is fixed on the external stair sloping plate, an upper sealing plate 4 and a lower sealing plate 5 are respectively and fixedly connected with the upper and lower sides of the support 3, the upper connecting plate 1 and the lower steel plate 2 are respectively fixed on the upper sealing plate 4 and the lower sealing plate 5, a polytetrafluoroethylene plate 6 is fixedly connected with the lower side of the lower sealing plate 5, the polytetrafluoroethylene plate 6 is attached to the lower steel plate 2 and can slide on the lower steel plate 2, a plurality of connecting rings 7 are fixedly connected with the side edge of the upper side surface of the lower steel plate 2 and the side edge of the lower side surface of the upper connecting plate 1, the connecting rings 7 are uniformly distributed along the side edges of the upper connecting plate 1 and the lower steel plate 2, the positions of the connecting rings 7 on the upper connecting plate 1 and the lower steel plate 2 are opposite up and down, two shape memory alloy ropes 8 are arranged in the connecting rings 7 in a penetrating way, the two shape memory alloy ropes 8 sequentially penetrate through the connecting rings 7 on the upper connecting plate 1 and the lower steel plate 2 to form a cross reticular structure between the upper connecting plate 1 and the lower steel plate 2, in the process of using the sliding support of the embodiment, only the integral support is required to be arranged between an external stair sloping plate and a stair beam, meanwhile, the structures of the upper connecting plate 1 and the lower steel plate 2 and the stair are fixedly connected with each other, then the connection between the upper connecting plate 1 and the lower steel plate 2 is realized by utilizing the idea that the shape memory alloy ropes 8 sequentially penetrate through the connecting rings 7, the specific connection structure is shown in figure 1, two shape memory alloy ropes 8 are crossed mutually and are netlike, so that connection between the upper connecting plate 1 and the lower steel plate 2 is realized, a limiting effect can be realized through the effect of the shape memory alloy ropes 8 in the sliding process of the sliding support, and after the sliding support is subjected to overrun sliding, the relative positions of the upper connecting plate 1 and the lower steel plate 2 can be reset through the reset effect of the shape memory alloy ropes 8, so that the unsafe structural influence caused by the position offset of the upper connecting plate 1 and the lower steel plate 2 after sliding in the prior art is avoided.
As a concrete implementation of improvement, shape memory alloy rope 8 includes heating core 81 and cladding shape memory alloy skin 82 on heating core 81, be equipped with battery 31 and control circuit 32 in the support 3, control circuit 32 couples between battery 31 and heating core 81, be equipped with tensile detector 811 in the heating core 81 and be used for detecting the tensile degree of heating core 81, tensile detector 811 couples in control circuit 32, control circuit 32 has tensile threshold in, when tensile detector 811 detects the tensile degree of heating core 81 and surpasss tensile threshold in the control circuit 32, control circuit 32 switch on battery 31 and heating core 81, through the setting of heating core 81 and shape memory alloy skin 82, alright drive shape memory alloy skin 82 to original shape through control circuit 32 for heating core 81 power supply make its mode of generating heat, so compare in the mode that adopts external heating, through the setting of heating core 81, alright effectually when needs with shape memory alloy rope 8 to the shape that returns, can effectively carry out inside the shape memory alloy skin 82 when the need to the original shape, can effectively carry out the shape memory alloy skin 82 and can not carry out the electric energy to the mode that the realization is more than the prior art that the stability is very big, and the electric energy that can not carry out the problem is more is easy to realize in the prior art, and the easy to realize the high-speed is compared with the prior art, the fact that the heating structure is more than the easy to the realization.
As a specific embodiment of improvement, the heating wire core 81 includes a wire core skin 812 and a plurality of heating columns 813, the wire core skin 812 is hollow, the shape memory alloy skin 82 is wrapped on the wire core skin 812, the plurality of heating columns 813 are uniformly arranged in the wire core skin 812 at intervals, the wire core skin 812 is made of elastic rubber material, graphene powder is filled between two adjacent heating columns 813 to electrically connect two adjacent heating columns 813, the tensile detector 811 includes two detection patches 8111, the two opposite lamination patches of the two detection patches 8111 are fixed at positions between the wire core skin 812 and the two heating columns 813, and are electrically connected with each other through the graphene powder, wherein the two detection patches 8111 are electrically connected with the control circuit 32 through wires to output resistance to the control circuit 32, the end of the heating wire core 81 in this embodiment is sleeved with a copper connection ring, the copper connection ring is in contact with the graphene powder inside, then the copper connection ring is connected with the control circuit 32 through a wire, when the control circuit 32 is connected, current in the storage battery 31 enters the graphene powder through the copper connection ring, and then is sequentially transferred into each heating post 813 through the graphene powder, so each heating post 813 is electrified and heated, the whole heating wire core 81 is heated, heating of the shape memory alloy skin 82 can be effectively realized, the deformed shape memory alloy skin 82 can be quickly and effectively restored to the original shape, the graphene powder is adopted as a main conductive material, the wire core skin 812 is made of an elastic rubber material, the graphene powder can be effectively extruded through the wire core skin 812, the graphene powder can be kept in a state of being connected with two adjacent heating columns 813, and when the heating wire core 81 is stretched along with the shape memory alloy sheath 82, the wire core sheath 812 can be effectively deformed and stretched, and the extruded graphene powder can keep the conductivity between the two adjacent heating columns 813, so that compared with the mode of connecting by adopting a wire or the mode of directly penetrating the heating wire in the shape memory alloy sheath 82, the graphene powder can be effectively changed along with the change of the shape memory alloy sheath 82, the corresponding heating performance can not be influenced after the change is finished, and meanwhile, the graphene powder can be matched with the detection patch 811 to effectively detect the situation that the current shape memory rope 8 is stretched according to the principle of conductor resistance, because when the wire core sheath 812 is stretched, the length of each wire core sheath 812 can be stretched, and the diameter can be narrowed, and the resistance output by the detection patch 811 can be reduced, so that the length of the shape memory alloy rope 8 which needs to recover the shape can be represented by the output resistance of the detection patch 811, and whether the current shape memory alloy rope 8 which needs to recover the shape can be effectively determined whether the current shape memory alloy rope 8 is in the state of the excessive deformation state or not.
As an improved specific embodiment, the detecting patch 8111 is an arc-shaped sheet, the curvature of the arc-shaped sheet is the same as the section of the wire core skin 812, and the arc-shaped sheet is closely attached to the inner wall of the wire core skin 812, so that the arc-shaped sheet can be better attached and fixed to the inner wall of the wire core skin 812.
As an improved specific embodiment, the control circuit 32 includes a voltage stabilizing circuit 321 and a switching tube 322, the voltage stabilizing circuit 321 is coupled to the storage battery 31 to receive the voltage output by the storage battery and convert the voltage to a lower voltage output, the voltage stabilizing circuit 321 is further coupled to the two detection patches 8111 and then grounded, the first end of the switching tube 322 is coupled to the storage battery 31, the second end is coupled to the heating post 813 and then grounded, the control end is coupled between the voltage stabilizing circuit 321 and the detection patches 8111, by setting the voltage stabilizing circuit 321, the voltage output by the storage battery 31 can be effectively converted to be used as a trigger signal, and by setting the switching tube 322, whether the storage battery 31 and the heating post 813 are conducted or not can be effectively controlled according to the resistance output by the detection patches 811.
As an improved specific embodiment, the heating post 813 is a heating resistor, and the heating resistor has the characteristics of large heating value and small volume, and can be well suitable for the occasion with limited space such as the heating wire core 81.
As an improved specific embodiment, the storage battery 31 is coupled with the piezoelectric generating piece 311, the piezoelectric generating piece 311 is arranged on a step surface of an external stair, so that the electric energy is output by being stepped on by a person and enters the storage battery 31, and the storage battery 31 can be effectively charged in the process of walking the stair by the arrangement of the piezoelectric generating piece 311, so that the electric energy output of the storage battery 31 is maintained, and the problem that the shape of the shape memory alloy skin 82 cannot be effectively recovered due to the fact that the heating wire core 81 cannot be heated when the storage battery 31 is not powered is avoided.
To sum up, the sliding support of this embodiment can effectively provide the sliding support with a sliding limiting effect through the cooperation of the connecting ring 7 and the shape memory alloy rope 8, so as to avoid the problem of influencing the structural safety in the prior art.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.

Claims (6)

1. The utility model provides a shape memory alloy rope stair support that slides which characterized in that: comprises an upper connecting plate (1), a lower steel plate (2) and a support (3), wherein the support (3) is arranged between an upper part of an external stair inclined plate and a stair beam, the upper connecting plate (1) is fixedly connected with the external stair beam, the lower steel plate (2) is fixedly connected with an upper sealing plate (4) and a lower sealing plate (5) respectively at the upper side and the lower side of the support (3), the upper connecting plate (1) and the lower steel plate (2) are respectively fixed on the upper sealing plate (4) and the lower sealing plate (5), a polytetrafluoroethylene plate (6) is fixedly connected at the lower side of the lower sealing plate (5), the polytetrafluoroethylene plate (6) is attached to the lower steel plate (2) and can slide on the lower steel plate (2), a plurality of connecting rings (7) are fixedly connected at the side edge of the upper side surface of the lower steel plate (2) and the side edge of the lower side surface of the upper connecting plate (1), the connecting rings (7) are uniformly distributed along the side edges of the upper connecting plate (1) and the lower steel plate (2), the upper connecting plate (1) and the lower connecting rings (2) are provided with two memory ropes (8) which are connected with each other in a shape memory rope, two strip-shaped memory alloy ropes (8) sequentially pass through connecting rings (7) on the upper connecting plate (1) and the lower steel plate (2) to form a cross reticular structure between the upper connecting plate (1) and the lower steel plate (2); shape memory alloy rope (8) include heating sinle silk (81) and cladding shape memory alloy skin (82) on heating sinle silk (81), be equipped with battery (31) and control circuit (32) in support (3), control circuit (32) couple between battery (31) and heating sinle silk (81), be equipped with tensile detector (811) in heating sinle silk (81) and be used for detecting the tensile degree of heating sinle silk (81), tensile detector (811) couple in control circuit (32), have tensile threshold in control circuit (32), when tensile detector (811) detects the tensile degree of heating sinle silk (81) and surpass tensile threshold, output signal to in control circuit (32), control circuit (32) switch-on battery (31) and heating sinle silk (81).
2. The shape memory alloy rope stair glide support according to claim 1 wherein: the heating wire core (81) comprises a wire core skin (812) and a plurality of heating columns (813), the wire core skin (812) is hollow, the shape memory alloy skin (82) is coated on the wire core skin (812), the heating columns (813) are uniformly distributed in the wire core skin (812) at intervals, the wire core skin (812) is made of elastic rubber materials, graphene powder is filled between two adjacent heating columns (813) so as to be electrically connected between the two adjacent heating columns (813), the tensile detector (811) comprises two detection patches (8111), two detection patches (8111) are oppositely attached and fixed at positions between the wire core skin (812) and the two heating columns (813) in contact with each other through the graphene powder, and the two detection patches (8111) are electrically connected with the control circuit (32) through wires so as to output resistance into the control circuit (32).
3. The shape memory alloy rope stair glide support according to claim 2 wherein: the detection patch (8111) is an arc-shaped sheet, the curvature of the detection patch is the same as the section of the wire core skin (812), and the detection patch is tightly attached to the inner wall of the wire core skin (812).
4. A shape memory alloy rope stair glide support according to claim 3 wherein: the control circuit (32) comprises a voltage stabilizing circuit (321) and a switching tube (322), wherein the voltage stabilizing circuit (321) is coupled to the storage battery (31) to receive the voltage output by the storage battery and then convert the voltage into lower voltage output, the voltage stabilizing circuit (321) is further coupled to the rear ground of the two detection patches (8111), the first end of the switching tube (322) is coupled to the storage battery (31), the second end of the switching tube is coupled to the rear ground of the heating column (813), and the control end of the switching tube is coupled between the voltage stabilizing circuit (321) and the detection patches (8111).
5. The shape memory alloy rope stair glide support according to claim 4 wherein: the heating column (813) is a heating resistor.
6. The shape memory alloy rope stair glide support according to claim 5 wherein: the storage battery (31) is coupled with the piezoelectric power generation piece (311), and the piezoelectric power generation piece (311) is arranged on the step surface of the external stair so as to be stepped by a person to output electric energy into the storage battery (31).
CN201910679326.4A 2019-07-25 2019-07-25 Shape memory alloy rope stair sliding support Active CN110374206B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201972240U (en) * 2010-12-28 2011-09-14 陈云 Self-resetting swinging shock-isolation support
CN103867625A (en) * 2013-11-26 2014-06-18 徐州工程学院 Rope type self-reset shape memory alloy seismic isolation and seismic reduction support
KR101525930B1 (en) * 2014-04-28 2015-06-09 인천대학교 산학협력단 Self restoring type passive damper
CN206681156U (en) * 2017-03-23 2017-11-28 陕西永安减震科技有限公司 A kind of elastic sliding bearing with marmem rope
CN109917685A (en) * 2019-04-09 2019-06-21 京东方科技集团股份有限公司 The control circuit and vibration isolation controller of isolation mounting
CN210767245U (en) * 2019-07-25 2020-06-16 深圳防灾减灾技术研究院 Shape memory alloy rope stair sliding support

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201972240U (en) * 2010-12-28 2011-09-14 陈云 Self-resetting swinging shock-isolation support
CN103867625A (en) * 2013-11-26 2014-06-18 徐州工程学院 Rope type self-reset shape memory alloy seismic isolation and seismic reduction support
KR101525930B1 (en) * 2014-04-28 2015-06-09 인천대학교 산학협력단 Self restoring type passive damper
CN206681156U (en) * 2017-03-23 2017-11-28 陕西永安减震科技有限公司 A kind of elastic sliding bearing with marmem rope
CN109917685A (en) * 2019-04-09 2019-06-21 京东方科技集团股份有限公司 The control circuit and vibration isolation controller of isolation mounting
CN210767245U (en) * 2019-07-25 2020-06-16 深圳防灾减灾技术研究院 Shape memory alloy rope stair sliding support

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