CN220393030U - Elevator door threshold Dan Shouli structure capable of preventing impact damage - Google Patents
Elevator door threshold Dan Shouli structure capable of preventing impact damage Download PDFInfo
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- CN220393030U CN220393030U CN202320860765.7U CN202320860765U CN220393030U CN 220393030 U CN220393030 U CN 220393030U CN 202320860765 U CN202320860765 U CN 202320860765U CN 220393030 U CN220393030 U CN 220393030U
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- 239000004575 stone Substances 0.000 claims abstract description 113
- 238000000034 method Methods 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000004579 marble Substances 0.000 abstract description 16
- 239000000463 material Substances 0.000 abstract description 6
- 239000004568 cement Substances 0.000 description 10
- 238000010276 construction Methods 0.000 description 9
- 238000005452 bending Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 7
- 238000004364 calculation method Methods 0.000 description 5
- 239000011083 cement mortar Substances 0.000 description 5
- 238000005034 decoration Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- 238000011900 installation process Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000013139 quantization Methods 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The utility model provides an elevator door threshold stone stress structure for preventing impact damage, which comprises a main leveling layer of building ground arranged at an elevator door opening, and a to-be-paved area formed between an elevator door sill and an in-building floor tile paving area, wherein threshold stones are paved on the main leveling layer of the building ground of the to-be-paved area; a rigid deflection control layer matched with the threshold stone is paved on the main leveling layer of the building floor of the area to be paved, and the threshold stone is in direct contact connection with the rigid deflection control layer; the side surface of the threshold Dan Tiege is a first mirror facing. The utility model continuously maintains the stress state of the mirror-surface-grade plate material of the rigid deflection control layer to be similar to the elastic foundation beam state with uniform load under the double functions of the tight contact of the mirror-surface-grade plate material of the rigid deflection control layer and the mirror-surface-grade plate material of the threshold marble and the low strain characteristic of the rigid deflection control layer.
Description
Technical Field
The utility model relates to the technical field of building decoration, in particular to an elevator door sill stone stress structure capable of preventing impact damage.
Background
The threshold stone is laid between the elevator sill and the floor tile paving area in the building for decoration, which is a common decoration method in building decoration engineering, and the traditional elevator threshold stone door threshold stone structure is formed by sequentially arranging a threshold stone paving cement mortar bonding layer and a threshold stone after finishing the construction of a leveling layer in a threshold stone area to be paved, wherein the threshold stone paving cement mortar bonding layer is used as a fixing layer for fixing the threshold stone. Under the traditional threshold stone structure condition, common main construction flow is: firstly, paving dry and hard cement mortar on a finished leveling layer; secondly, putting the threshold stone on the dry and hard cement mortar, and taking down the threshold stone after the threshold stone is gently knocked and leveled; thirdly, paving and pasting the coating cement paste at the bottom of the threshold stone, and putting the threshold stone into use after the curing time is reached.
The threshold stone constructed in the traditional structural form is used and maintained in the later stage, and the defects are that:
firstly, the problem that the lower part of the threshold stone is empty and the threshold stone and the cement paste bonding layer are separated in the operation cannot be avoided in the traditional installation process, the formed cavity changes the stress state of the long marble when the marble is subjected to external force into a simple beam from a better elastic foundation beam, sufficient space is provided for brittle broken of the brittle marble threshold stone due to impact, and the broken hidden danger of the marble threshold stone cannot be effectively eliminated.
Secondly, the traditional process paving method causes inconvenient replacement of threshold stone and long maintenance time, thereby affecting the use of elevators and related buildings; meanwhile, the installation quality of the new threshold stone cannot be guaranteed. And in the maintenance process, the threshold stone is inconvenient to repair and operate.
Disclosure of Invention
The utility model aims to provide a threshold stone stress structure for enabling an elevator door threshold Dan Shouli to be in a state of an elastic foundation beam (uniformly distributed load stress).
For this purpose, the utility model adopts the following technical scheme:
the elevator door sill stone stress structure capable of preventing impact damage comprises a main leveling layer of building ground arranged at an elevator door opening, and a to-be-paved area is formed between an elevator door sill and an inner floor tile paving area, wherein threshold stones are paved on the main leveling layer of the building ground in the to-be-paved area; a rigid deflection control layer matched with the threshold stone is paved on the main leveling layer of the building floor of the area to be paved, and the threshold stone is in direct contact connection with the rigid deflection control layer; the side surface of the threshold Dan Tiege is provided with a first mirror surface facing, and the rigid deflection control layer is attached to the side surface of the threshold stone and is provided with a second mirror surface facing.
Further: the elevation of the top surface of the floor tile paving area in the building is consistent with the elevation of the top surface of the threshold stone.
Further: the threshold stone should have a specular gloss of the first specular overlay of not less than 70 gloss units.
Further: the rigid deflection control layer is a mirror-surface grade steel plate with the thickness of 3-5 mm.
Compared with the prior art, the utility model has the following beneficial effects:
according to the utility model, by arranging the tight contact between the mirror surface of the rigid deflection control layer and the mirror surface of the threshold stone marble and the dual effects of the low strain characteristic of the rigid deflection control layer, the under-pad surface of the threshold stone is ensured to be in good contact with the lower structure all the time, so that the stress state is kept to be similar to an elastic foundation beam state with uniform load, meanwhile, the higher elastic modulus of the rigid deflection control layer generates very weak deformation, so that the deflection value of the threshold stone under the impact force condition is controlled within the breaking deflection range, and the problem that the threshold stone breaks after exceeding the limit deflection when the external impact force is applied to the threshold stone is avoided. Meanwhile, compared with the traditional threshold stone structure, the construction process is simplified, the construction time is shortened, and the use of an elevator and related buildings is not affected basically; and the installation quality of the new threshold stone can be ensured basically without being influenced by the installation environment.
Drawings
FIG. 1 is a schematic plan view of the present utility model;
FIG. 2 is a schematic cross-sectional view of the structure of FIG. 1 at A-A in accordance with the present utility model.
The marks in the drawings are: 1-threshold stone; 2-a rigid deflection control layer; 3-paving areas of floor tiles in the building; 4-elevator door sill; 5-a main leveling layer of the building floor.
Detailed Description
The utility model is further illustrated by the following figures and examples, which are not intended to be limiting.
As shown in fig. 1-2, an elevator entrance threshold stone stress structure for preventing impact damage comprises a main leveling layer 5 of building ground arranged at an elevator gate, a to-be-paved area is formed between an elevator door sill 4 and a floor tile paving area 3 in a building, and threshold stones 1 are paved on the main leveling layer 5 of the building ground in the to-be-paved area; a rigid deflection control layer 2 matched with the threshold stone 1 is paved on a main leveling layer 5 of the building floor in the area to be paved, and the threshold stone 1 is in direct contact connection with the rigid deflection control layer 2; the side surface of the threshold stone 1 attached to the rigid deflection control layer 2 is a first mirror surface attached surface, and the rigid deflection control layer 2 is attached to the side surface of the threshold stone 1 to form a second mirror surface attached surface.
The rigid deflection control layer 2 of the embodiment replaces the traditional threshold stone paving cement mortar bonding layer.
Wherein, the elevation of the top surface of the floor tile paving area 3 in the building is consistent with the elevation of the top surface of the threshold stone 1.
Wherein the specular gloss of the first specular surface of the threshold stone 1 should be not less than 70 gloss units. Adopting a glossiness meter with the incident angle of 60 degrees and the aperture diameter not smaller than 18mm to test according to the specification of GB/T13891; and is accepted as specified in specification GB 19766.
Wherein the rigid deflection control layer 2 is a mirror-surface grade stainless steel plate with the thickness of 4 mm. The second mirror surface is processed with high reflectivity and clear image of the surface non-directional texture; and is accepted as specified in specification GB 3280.
It should be noted that, in this embodiment, by setting the tight contact between the mirror surface of the rigid deflection control layer 2 and the mirror surface of the marble 1, and under the dual effects of the low strain characteristic of the rigid deflection control layer 2, on one hand, the lower pad surface of the doorsill stone 1 is always kept in good contact with the lower structure, so that the stress state is continuously kept in an elastic foundation beam state similar to uniform load, and on the other hand, under the condition that the higher elastic modulus of the rigid deflection control layer 2 generates extremely weak deformation to ensure the impact force, the deflection value of the doorsill stone is controlled in the breaking deflection range, so that the problem that the hollow cavity formed after the phenomenon that the lower part of the doorsill stone 1 is empty and the cement paste is separated in the traditional installation process is directly avoided, and the problem that the doorsill stone breaks after the stress mode of the "simple support beam" exceeds the limit deflection when the external impact force is applied to the doorsill stone is solved, and the broken hidden danger of the marble doorsill stone is quantized in mechanical principle.
The specific reason is explained as follows:
firstly, the fracture limit deflection of the elevator entrance threshold stone 1 under the traditional process and construction conditions is calculated. When the hollows or mortar at the lower part of the threshold stone 1 are released, the stress is similar to a hinged simple beam. At the moment, the lower edge of the fracture surface reaches the ultimate tensile stress of the material, the ultimate tensile stress standard value is 7Mpa according to the conventional standard value, and the elastic modulus standard value is 55000N/mm < 2 >. Taking the common elevator door threshold stone 1 with the length equal to the maximum width of an elevator door as an example, calculating when the width of the cross section of the elevator door threshold stone 1 is 0.2m and the thickness is 0.025 m.
(1) Calculating the section bending moment at the fracture:
when the bent marble threshold stone 1 reaches the maximum stress sigma max of the ultimate tensile stress, namely 7Mpa, and crack damage occurs, the section bending moment at the fracture is calculated according to the following formula:
σmax＝M/(1/6bh2)
wherein: maximum stress of the lower section edge of the sigma max fracture part is taken as a standard value of 7Mpa of the tension stress of the marble Dan Jixian; m represents a bending moment existing on a section of a fracture; b represents the width of the cross section of the threshold stone to be 0.2m; h represents the thickness of threshold stone and is 0.025m of the conventional thickness;
calculated, when=7 Mpa, fracture surface bending moment m=σmax× (1/6 bh 2) = 145.83n·m.
(2) Calculating equivalent impact stress value on the mid-span section at break:
according to a moment calculation formula generated by the concentrated force of the hinged beams at the two ends on the midspan section, when the bending moment of the fracture surface is M= 145.83 N.m, the impact stress value on the midspan section is calculated according to the following formula:
M＝PL×1/4
wherein M represents a bending moment existing on a section of a fracture site, and the unit is N.m; p represents the stress value applied to the threshold Dan Kuazhong, N; l represents the threshold stone span in m.
When the fracture surface bending moment is m= 145.83n·m, the impact stress value p=m/(l×1/4) = 486.111N on the midspan section at this time.
(3) Calculating the limit deflection generated under the equivalent concentrated stress:
according to the calculation, when the maximum deflection under one concentrated load in the midspan of the beam is broken in the midspan of the threshold stone 1, the calculation formula of the maximum deflection is as follows:
Ymax＝8PL3/(384EI)
wherein: ymax is the maximum deflection (mm) of the threshold stone span; p is the sum of the standard values of all concentrated loads; l is the span of threshold stone; e is the elastic modulus of the material corresponding to the threshold stone, and 55X 106N/mm2 (Mpa) is taken for marble; i is the section moment of inertia of the threshold stone.
Ymax=8pl 3/(384 EI) = 0.00122mm, that is, when the mid-span deflection of the marble threshold stone 1 is only 0.00122mm, and when the mid-span concentrated load stress is only 486.11N, the practical meaning is that under extreme adverse conditions, breakage occurs when the mid-span concentrated load impact stress of the marble threshold stone 1 with a length of 1.2m, a width of 0.2m, and a thickness of 0.025m is only 486.11N, the deflection reaches 0.00122mm. Therefore, the condition that the lower surface of the marble threshold stone 1 is always kept in close contact with the upper surface of the rigid deflection control layer 2, the marble threshold stone is not separated and is empty is formed, and the mid-span deflection is ensured to be less than 0.00122mm, so that the condition of breaking and destroying the marble threshold stone can be eliminated in mechanical principle.
(4) Adopting a rigid deflection control layer 2 to limit the deflection effect of the threshold stone 1 to carry out checking calculation:
at the moment, the rigid deflection layer 2 is elastically deformed under the condition of uniformly distributing load, and the strain generated by the rigid deflection layer is calculated according to an elastic deformation formula.
ε＝σ/E
Wherein: e is the elastic modulus of engineering steel 2100000N/mm2; sigma is the stress unit N/mm < 2 >, and uniformly distributed stress generated by the allowable load capacity of a common elevator of 1.6t is taken; epsilon is the section strain and is dimensionless.
ε＝σ/E＝1.6×1000×10÷(1200×200)/2100000＝3.175×10-8
Cross-sectional compressive strain amount s=rigid deflection control layer thickness b×epsilon=4×3.175×10-8=1.27×10-7mm.
Under practical conditions, a load of 1.6t cannot be uniformly distributed on the whole rigid deflection control layer 2 through the threshold stone 1 due to the influence of a force transfer effect, a calculation result is corrected by adjusting the coefficient K, the most conservative coefficient 5000 is adopted, namely, the lower rigid deflection control layer of the threshold stone 1 only has an area bearing pressure of 1/5000, and similarly, the upper part of the lower rigid deflection control layer bears all forces in a range of about 48mm < 2 > (about 7mm multiplied by 7 mm) right against the contact area of the truck tire and the threshold stone 1 in practical use, the corresponding deformation quantity is increased by 5000 times, the conservative cross-section compression strain quantity S=the thickness b multiplied by epsilon multiplied by K=4 multiplied by 3.175 multiplied by 10 < -8 multiplied by 5000= 0.000635mm, and the most adverse condition of the threshold stone 1 is far less than the mid-span fracture limit deflection 0.00122mm.
Therefore, the problem that the traditional installation process cannot avoid the phenomenon that the lower part of the threshold stone 1 is empty and the threshold stone 1 is separated from the cement paste bonding layer in operation is solved in a mechanical principle method and structure, and the cavity formed after the phenomenon that the threshold stone 1 is separated from the cement paste bonding layer is broken after the stress mode of the simply supported beam exceeds the limit deflection when the threshold stone 1 is subjected to external impact force is solved in a mechanical principle quantization mode.
It should also be noted that the traditional process paving method causes inconvenient replacement of threshold stone and affects the use of elevators and related buildings; meanwhile, the installation quality of the new threshold stone cannot be guaranteed. The existing threshold stone structure is replaced by electric and pneumatic breaking equipment or manual chiseling, and due to limited operation space, the mechanical operation is likely to damage peripheral materials, so that the loss is further enlarged. In the maintenance process, the specified maintenance time is long before the use, so that the corresponding elevator needs to be stopped for a long time, and the normal use of the elevator and the building is influenced for a long time.
Compared with the traditional threshold stone structure, the method has the advantages that the construction flow is simplified, the construction time is shortened, and the use of an elevator and related buildings is basically not affected; meanwhile, the installation quality of the new threshold stone can be ensured without being influenced by the installation environment basically. Meanwhile, the length of time of interference of maintenance construction on elevator facilities is reduced, and the problems that the elevator cannot be used in the process of replacing threshold stones in the traditional structure, and the elevator threshold stone is difficult to maintain and maintain due to large influence on the use of corresponding building facilities such as the elevator are solved.
Meanwhile, compared with the traditional threshold stone structure, the primary installation can reduce the consumption of cement and water, and even if the cement and water are damaged and replaced under extreme working conditions, the novel environmental pollutants similar to waste cement blocks and the like are not increased, large-scale broken and detached objects are not needed to be used for saving electric energy, the cement is not needed to be reused for reducing the carbon emission pressure to the environment in the cement production process, and the environment protection is facilitated.
Referring to fig. 1-2, in the construction of the threshold stone stress structure of the elevator hoistway, the following specific method is adopted:
after the main leveling layer 5 of the building ground is finished, checking the elevation of the top surface to the design elevation of the ground decoration, ensuring that the reserved height is equal to the sum of the thickness of the selected threshold stone 1 and the thickness of the rigid deflection control layer 2, firstly putting the rigid deflection control layer 2, wiping the upper surface of the rigid deflection control layer by using a rag, wiping the lower bottom surface of the threshold stone 1 by using the rag, and finally placing the lower bottom surface of the threshold stone 1 on the rigid deflection control layer 2 downwards to be directly used.
When the threshold stone 1 needs to be replaced, the old threshold stone can be lifted up and taken out by being adsorbed on the old threshold stone by using a large-sized sucker, then the upper surface of the rigid deflection control layer 2 is wiped clean by using a rag, the lower bottom surface of the new threshold stone 1 is wiped clean by using the rag, and then the lower bottom surface of the new threshold stone 1 is downwards placed on the upper surface of the original rigid deflection control layer 2.
The above embodiment is only one preferred technical solution of the present utility model, and it should be understood by those skilled in the art that modifications and substitutions can be made to the technical solution or parameters in the embodiment without departing from the principle and essence of the present utility model, and all the modifications and substitutions are covered in the protection scope of the present utility model.
Claims (4)
1. The elevator entrance threshold stone stress structure capable of preventing impact damage comprises a main building ground leveling layer (5) arranged at an elevator gate, and a to-be-paved area is formed between an elevator door sill (4) and an in-building floor tile paving area (3), wherein threshold stones (1) are paved on the main building ground leveling layer (5) of the to-be-paved area; the method is characterized in that: a rigid deflection control layer (2) matched with the threshold stone (1) is paved on the main leveling layer (5) of the building floor in the area to be paved, and the threshold stone (1) is in direct contact connection with the rigid deflection control layer (2);
the threshold stone (1) is attached to the side surface of the rigid deflection control layer (2) to form a first mirror surface facing, and the rigid deflection control layer (2) is attached to the side surface of the threshold stone (1) to form a second mirror surface facing.
2. An elevator hoistway sill stone stressing structure against impact damage as defined in claim 1, wherein: the elevation of the top surface of the floor tile paving area (3) in the building is consistent with the elevation of the top surface of the threshold stone (1).
3. An elevator hoistway sill stone stressing structure against impact damage as defined in claim 1, wherein: the specular gloss of the first specular surface of the threshold stone (1) should be not less than 70 gloss units.
4. An elevator hoistway sill stone stressing structure against impact damage as defined in claim 1, wherein: the rigid deflection control layer (2) is a mirror-surface grade steel plate with the thickness of 3-5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320860765.7U CN220393030U (en) | 2023-04-13 | 2023-04-13 | Elevator door threshold Dan Shouli structure capable of preventing impact damage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320860765.7U CN220393030U (en) | 2023-04-13 | 2023-04-13 | Elevator door threshold Dan Shouli structure capable of preventing impact damage |
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| Publication Number | Publication Date |
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| CN220393030U true CN220393030U (en) | 2024-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320860765.7U Active CN220393030U (en) | 2023-04-13 | 2023-04-13 | Elevator door threshold Dan Shouli structure capable of preventing impact damage |
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| Country | Link |
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| CN (1) | CN220393030U (en) |
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2023
- 2023-04-13 CN CN202320860765.7U patent/CN220393030U/en active Active
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