CN110006944B - Experimental research method and device for heat conducting performance of internal structure of rubber support - Google Patents
Experimental research method and device for heat conducting performance of internal structure of rubber support Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000011160 research Methods 0.000 title claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 125
- 239000010959 steel Substances 0.000 claims abstract description 125
- 238000012360 testing method Methods 0.000 claims abstract description 94
- 238000010438 heat treatment Methods 0.000 claims abstract description 69
- 239000011241 protective layer Substances 0.000 claims abstract description 20
- 238000012546 transfer Methods 0.000 claims abstract description 18
- 238000009826 distribution Methods 0.000 claims abstract description 13
- 230000007246 mechanism Effects 0.000 claims abstract description 6
- 239000010410 layer Substances 0.000 claims description 65
- 238000009413 insulation Methods 0.000 claims description 8
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 7
- 239000011490 mineral wool Substances 0.000 claims description 7
- 238000004321 preservation Methods 0.000 claims description 4
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 238000005485 electric heating Methods 0.000 claims description 2
- 238000011835 investigation Methods 0.000 claims 2
- 230000009471 action Effects 0.000 abstract description 2
- 238000002474 experimental method Methods 0.000 description 17
- DBUTVDSHVUGWOZ-UHFFFAOYSA-N [Si].[Ni].[Cr].[Ni] Chemical compound [Si].[Ni].[Cr].[Ni] DBUTVDSHVUGWOZ-UHFFFAOYSA-N 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 4
- 101000793686 Homo sapiens Azurocidin Proteins 0.000 description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
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Abstract
The invention discloses a method for experimental study of heat conduction performance of an internal structure of a rubber support and a device for realizing the method; the method comprises the following steps: (10) preparing an experimental test piece: preparing an experimental test piece which can be heated by a single side and can monitor internal and external heat transfer in real time; (20) controlled single-sided heating: the experimental test piece is controllably heated from one end of the rubber protective layer, and the temperature distribution of each position in the experimental test piece is recorded in real time; (30) internal thermal conductivity analysis: and analyzing to obtain the heat conduction mechanism of the internal structure of the rubber support. The device comprises an experimental test piece (1), a heater (2) for controllable single-side heating and a clamp (3) for dislocation deformation of the rubber steel plate laminated body along the heat transfer direction. According to the method and the device, the multi-controllable parameter research and analysis of the heat conduction of the internal structure of the rubber support are realized through single-side heat conduction, and meanwhile, the residual deformation of the rubber support under the action of an earthquake is considered, so that the observation intuitiveness of high-temperature damage is good, and the result is accurate.
Description
Technical Field
The invention belongs to the technical field of research on the fireproof performance of a shock-insulating rubber support, and particularly relates to a single-side heat conduction experimental method and device for improving a unidirectional heat conduction experimental model, realizing multi-component analysis of experimental influence factors and having high experimental precision.
Background
The rubber support has obvious shock insulation effect and stable performance, and is one of the building shock insulation devices with the widest application at present. But the rubber support has poor fire resistance, and is a fire-resistant weak link of the shock insulation building. Therefore, the method has important scientific and engineering significance for researching the fire resistance of the rubber support, particularly the heat conduction mechanism of the internal structure.
At present, the high-temperature experiment method of the rubber support mainly adopts an ISO 834 standard heating curve to carry out continuous open flame experiment on the rubber support in a heating furnace. The observation and analysis of the high-temperature damage evolution process of the internal laminated structure of the rubber support are difficult to realize.
Thus, the prior art has the following problems:
1. an open flame experiment is performed, so that the test piece is heated unevenly and measures the temperature;
2. the heat conduction analysis of the rubber support is unclear;
3. the thermodynamic coupling experimental device is complex.
Disclosure of Invention
The invention aims to provide an experimental research method for the heat conduction performance of the internal structure of a rubber support, which realizes the research and analysis of multiple controllable parameters of the internal structure of the rubber support through single-side heat conduction, and simultaneously considers the residual deformation of the rubber support under the action of an earthquake, so that the observation intuitiveness of high-temperature damage is good, and the result is accurate.
The invention further aims to provide a heat conduction research device for the internal structure of the rubber support.
The technical scheme for realizing the purpose of the invention is as follows:
an experimental study method for the heat conduction performance of an internal structure of a rubber support comprises the following steps:
(10) Preparing an experimental test piece: according to the actual structural characteristics of the rubber support and the heat conduction research requirement of the internal structure, preparing an experimental test piece which can be heated by a single side and can monitor internal and external heat transfer in real time; the middle part of the experimental test piece is a rubber steel plate laminated body formed by vulcanizing alternately overlapped steel plate layers and rubber layers, one end of the experimental test piece is provided with a rubber protection layer, the other end of the experimental test piece is provided with a lead core, and all the other surfaces except one end of the rubber protection layer are covered with heat insulation layers;
(20) Controllable single-side heating: the experimental test piece is controllably heated from one end of the rubber protective layer, and the temperature distribution of each position in the experimental test piece is recorded in real time;
(30) Internal thermal conductivity analysis: and analyzing and obtaining the heat conduction mechanism of the internal structure of the rubber support according to the change of the temperature distribution of each part in the experimental test piece along with the single-side heating.
The technical scheme for realizing the other purpose of the invention is as follows:
the experimental research device for the heat conduction performance of the internal structure of the rubber support comprises an experimental test piece 1, a heater 2 for controllable single-side heating and a clamp 3 for misplacement deformation of a rubber steel plate laminated body along the heat transfer direction; the experimental test piece 1 comprises a rubber steel plate laminated body formed by vulcanizing alternately stacked steel plate layers 11 and rubber layers 12 in the middle of the experimental test piece, a rubber protection layer 13 is detachably arranged at one end, a lead core 14 is detachably arranged at the other end, heat preservation layers 15 are respectively covered on all the other surfaces except one end of the rubber protection layer, and the experimental test piece 1 further comprises a temperature sensor 23, wherein the temperature sensor 23 is fixed on the surface of the experimental test piece 1 and the inside of the rubber steel plate laminated body.
Compared with the prior art, the invention has the remarkable advantages that:
1. further improving the experimental accuracy. The heating medium of the rubber steel plate laminated body adopts heating air to realize uniform heating of the rubber steel plate laminated body;
2. further realizing a unidirectional heat conduction model. The rectangular selection of the rubber steel plate laminated body and the adoption of refractory rock wool to wrap the indirect heating surface comprehensively consider the heating process of the rubber support under the actual working condition, simplify the experimental model under the actual working condition of ensuring the verification of the reduction of the height, realize the unidirectional heat conduction model of the rubber steel plate laminated body, visually observe the damage inside the rubber support under the high-temperature effect, and analyze the heat conduction mechanism of the rubber support under the single-side heating;
3. and further realizing the multi-element analysis of experimental influence factors. The rubber protection layer and the lead core of the rubber steel plate laminate are easy to mount and dismount, and the high Wen Duibi experiment of different rubber steel plate laminate types, the existence of the rubber protection layer and the existence of the lead core can be carried out, so that the influence variable analysis in the high temperature resistance study of the rubber steel plate laminate is facilitated;
3. further perfecting the experimental model. The deformation of the rubber steel plate laminated body and the fixation of the deformed rubber steel plate laminated body can be generated by using the deformation fixing clamp of the rubber steel plate laminated body, the elastic recovery deformation of the rubber steel plate laminated body is limited, and the high-temperature experiment of the rubber steel plate laminated body is carried out under the state, so that the experimental method and the experimental model are closer to the stress condition of the actual working condition.
The invention is further described below with reference to the drawings and the detailed description.
Drawings
FIG. 1 is a main flow chart of an experimental study method for the heat conduction performance of the internal structure of the rubber support.
Fig. 2 is a schematic diagram of the external structure of the experimental study device for the heat conduction performance of the internal structure of the rubber support.
Fig. 3 is a front view of fig. 2.
Fig. 4 is a top view of fig. 2.
Fig. 5 is a sectional view of fig. 4 at 1-1.
Fig. 6 is a left side view of fig. 2 with the heater removed.
Fig. 7 is a right side view of fig. 2.
Fig. 8 is a detailed view of the structure of the experimental test piece in fig. 2.
In the figure, an experimental test piece 1, a heater 2 and a clamp 3;
the steel plate layer 11, the rubber layer 12, the rubber protection layer 13, the lead core 14 and the heat preservation layer 15;
a heating resistance wire 21, a low-carbon steel bracket 22, a temperature sensor 23;
an upper steel plate 31, a lower steel plate 32, a fixing bolt 33, an L-shaped steel rod 34, a telescopic stay rod 35, a left-handed cap 36, a right-handed cap 37 and a fixing nut 38.
Detailed Description
As shown in FIG. 1, the experimental research method for the heat conduction performance of the internal structure of the rubber support comprises the following steps:
(10) Preparing an experimental test piece: according to the actual structural characteristics of the rubber support and the heat conduction research requirement of the internal structure, preparing an experimental test piece which can be heated by a single side and can monitor internal and external heat transfer in real time; the middle part of the experimental test piece is a rubber steel plate laminated body formed by vulcanizing alternately overlapped steel plate layers and rubber layers, one end of the experimental test piece is provided with a rubber protection layer, the other end of the experimental test piece is provided with a lead core, and all the other surfaces except one end of the rubber protection layer are covered with heat insulation layers;
(20) Controllable single-side heating: the experimental test piece is controllably heated from one end of the rubber protective layer, and the temperature distribution of each position in the experimental test piece is recorded in real time;
in the step (20) of controllable unilateral heating, the controllable heating adopts electric heating to air at one end of the rubber protective layer of the experimental test piece.
And a plurality of temperature sensors are uniformly arranged on the outer side of the rubber protective layer of the experimental test piece so as to ensure that the heating surface is uniformly heated.
And a plurality of temperature sensors are arranged in the experimental test piece along the directions parallel and perpendicular to the heat transfer direction so as to record the temperature distribution of each place in the experimental test piece.
When the controllable heating is carried out on the experimental test piece from one end of the rubber protection layer, the experimental test piece can be heated under the following conditions:
the rubber-free protective layer, the lead-free core, and the rubber-free protective layer, the lead-free core and the rubber steel plate laminate are deformed in a staggered manner along the heat transfer direction.
The dislocation deformation of the rubber steel plate laminated body along the heat transfer direction means that the upper layer and the lower layer of the rubber steel plate laminated body are relatively translated along the heat transfer direction to form dislocation under the conditions that the test piece is provided with a rubber protection layer and a lead core, the rubber protection layer is not provided, the lead core is not provided, and the rubber protection layer is not provided.
(30) Internal thermal conductivity analysis: and analyzing and obtaining the heat conduction mechanism of the internal structure of the rubber support according to the change of the temperature distribution of each part in the experimental test piece along with the single-side heating.
As shown in FIG. 2, the experimental research device for the heat conduction performance of the internal structure of the rubber support is used for realizing the research method.
The device comprises an experimental test piece 1, a heater 2 for controllable single-side heating and a clamp 3 for misplacement deformation of a rubber steel plate laminated body along a heat transfer direction;
as shown in fig. 8, the experimental test piece 1 comprises a rubber steel plate laminate body formed by vulcanizing alternately stacked steel plate layers 11 and rubber layers 12 in the middle of the experimental test piece, wherein a rubber protection layer 13 is detachably arranged at one end, a lead core 14 is detachably arranged at the other end, and heat preservation layers 15 are respectively covered on all the other surfaces except one end of the rubber protection layer; and a temperature sensor 23, wherein the temperature sensor 23 is fixed on the surface of the experimental test piece 1 and inside the rubber steel plate laminated body.
The test piece 1 is selected to be a cuboid, and has the length of 300mm, the width of 100mm and the height of 260mm, so that the single-side heat conduction condition of the inner section of the actual rubber support is simulated. The specifications, materials and whether to assemble the specific rubber protective layer 13, lead core 14 and rubber steel plate laminate can be selectively changed according to practical research requirements.
As shown in fig. 2-7, the heater 2 comprises a heating resistance wire 21 and a low-carbon steel bracket 22, two ends of the heating resistance wire 21 are respectively fixed on two round holes of the low-carbon steel bracket 22, and the heating resistance wire 21 is separated from the heated end of the experimental test piece 1 by air.
As shown in figures 2, 3 and 5,
the clamp 3 comprises an upper steel plate 31, a lower steel plate 32, a fixing bolt 33, an L-shaped steel rod 34, a telescopic stay rod 35, a left-hand cap 36, a right-hand cap 37 and a fixing nut 38;
the upper steel plate 31 is tightly attached to the upper surface of the experimental test piece 1 and is fixed by using a fixing bolt 33, one end of the upper steel plate at least covers the upper end of the rubber protective layer 13, the other end of the upper steel plate extends beyond the upper end of the lead core 14, and the upper end of the vertical section of the L-shaped steel rod 34 is detachably connected with the upper end of the vertical section of the L-shaped steel rod by a fixing nut 38;
the lower steel plate 32 is tightly attached to the lower surface of the experimental test piece 1, and is fixed by using a fixing bolt 33, one end of the lower steel plate at least covers the lower end of the rubber protection layer 13, the other end of the lower steel plate extends beyond the lower end of the lead core 14, the lower steel plate is clamped on one end with a groove of the telescopic supporting rod 35, the whole length threads of the telescopic supporting rod 35 are sleeved in the horizontal section of the L-shaped steel rod 34, the left end of the horizontal section of the L-shaped steel rod 34 is abutted by a left-handed cap 36, and the right end of the horizontal section of the L-shaped steel rod 34 is abutted by a right-handed cap 37.
Preferably, except one end of the rubber protective layer, all the other surfaces of the experimental test piece 1 are tightly wrapped with 100mm thick aluminum silicate fiber fireproof rock wool for heat insulation.
The working process of the experimental study device for the heat conduction performance of the internal structure of the rubber support is described in detail below.
The lead wire extending out of the heating resistance wire is fixed in a round hole of a low-carbon steel support, the steel support is arranged on one side of the rubber support, which is provided with a rubber protection layer, a heating curve of the heating resistance wire is arranged, a plurality of thermocouple temperature sensors are arranged between the heating resistance wire and the rubber steel plate laminated body and on the surface and inside of the rubber steel plate laminated body, a lead core rubber steel plate laminated body test piece with the rubber protection layer is manufactured, the rest surface of the rubber steel plate laminated body test piece except the heated side is wrapped with refractory rock wool, and the single-side heating process of the actual rubber support is simulated. The following experiments were started:
1. conventional rubber steel plate laminate heating experiments
The temperature rising curve of the heating resistance wire is preset, and the temperature of the rubber steel plate laminate test piece and the internal temperature change of the rubber steel plate laminate test piece are monitored in real time through a thermocouple temperature sensor.
The heating resistance wire 21 is used as a heat source, a lead wire of the heating resistance wire 21 is fixed on a round hole of the low-carbon steel support 22, the heating resistance wire 21 and the steel support 22 are arranged at a position of 100mm on one side of the rubber protection layer 13 of the rubber steel plate laminated body experimental test piece 1, and uniform and controllable heat is generated by the heating resistance wire 21 according to an ISO 834 standard temperature rise curve through the preset heating resistance wire 21. 7 nickel-chromium-nickel-silicon thermocouple temperature sensors 23 are adhered on the surface of the rubber protective layer 13 between the heating resistance wire 21 and the rubber steel plate laminated structure experimental test piece 1. The measuring point positions are 7-point distribution: the upper side and the lower side are respectively stuck with 2 pieces, the middle surface is stuck with 3 pieces at equal intervals, and the heating temperature of the surface of the rubber protective layer 13 of the rubber steel plate laminated body experimental test piece 1 is monitored in real time. The 7-point distribution pasting 7 nickel-chromium-nickel-silicon thermocouple temperature sensors 23 are also adopted for the vulcanization connecting interface of the test piece 1 of the laminated structure experiment of the rubber protective layer 13 and the rubber steel plate. The inside of the rubber steel plate laminated structure experiment test piece 1 is provided with 54 nickel-chromium-nickel-silicon thermal thermocouple temperature sensors 23 along the vertical direction between the rubber steel plate laminated layers, and the measuring point positions are distributed at 6 points: 2 thermocouple sensors 23 are vertically arranged on the upper and lower interfaces of the uppermost rubber layer and the lowermost rubber layer of the rubber steel plate laminated structure experimental test piece 1 respectively, 2 thermocouple sensors 23 are vertically arranged on the upper and lower interfaces of the middle steel plate layer of the rubber steel plate laminated structure experimental test piece 1, and 54 thermocouple temperature sensors 23 are equally arranged at three equal intervals along the length direction and the width direction of the rubber steel plate laminated structure experimental test piece 1 according to the 6-point distribution position. And 7 nickel-chromium-nickel-silicon thermocouple temperature sensors 23 are adhered between the lead core 14 and the rubber steel plate laminated structure experimental test piece 1 according to 7-point distribution on the outer surface of the lead core 14. The heat transfer condition of the rubber protective layer 13, the laminated structure of the rubber steel plate, the lead core 14 and the rubber layer and the steel plate on one side is monitored in real time. The non-direct heating surface of the rubber steel plate laminated body experimental test piece 1 is wrapped with 100mm thick aluminum silicate fiber fireproof rock wool 15, the rubber steel plate laminated body experimental test piece 1 only exposes the rubber protection layer 13, only one side heating source is guaranteed to influence when the rubber steel plate laminated body experimental test piece 1 is heated, apparent heating change of a rubber steel plate laminated structure can be observed and recorded, and internal heating damage condition in the actual rubber support heating process is replaced.
2. Heating experiment of rubber steel plate laminate without rubber protective layer
And (3) carrying out a rubber protection layer vulcanization manufacturing process on the basis of the rubber steel plate laminated body test piece, and carrying out a rubber steel plate laminated body heating experiment without a rubber protection layer according to the heating resistance wire temperature rising curve, the thermocouple temperature sensor mounting position and the data interval.
3. Heating experiment of lead-free rubber steel plate laminate
And disassembling the fixing bolt on the basis of the rubber steel plate laminated body experimental test piece to remove the lead core, and performing a rubber steel plate laminated body heating experiment without the lead core according to the heating resistance wire temperature rising curve, the thermocouple temperature sensor mounting position and the data interval.
4. Heating experiment of rubber steel plate laminate under deformation
And installing a laminate deformation fixing clamp between the upper steel plate and the lower steel plate of the rubber steel plate laminate test piece on the basis of the rubber steel plate laminate test piece, clamping one end of a telescopic stay bar with a groove on the lower steel plate, sleeving the other end of the telescopic stay bar into one end of an L-shaped steel bar, screwing and fixing the other end of the L-shaped steel bar with a reserved hole of the upper steel plate by using a fixing nut, adjusting screw caps at two ends of the telescopic stay bar, rotating the two screw caps in the same direction, pushing the lower steel plate by means of the reaction force of the L-shaped steel bar, and stopping rotating the screw caps after the rubber steel plate laminate is deformed to a target deformation position.
And presetting a heating resistance wire temperature rising curve, monitoring the temperature and internal temperature change conditions of a rubber steel plate laminate experimental test piece displayed by a thermocouple temperature sensor in real time, and simulating the heating condition of a rubber support under actual residual deformation.
5. Data acquisition of test piece of rubber steel plate laminated body after heated and cooled
And (3) closing a power supply of the heating resistance wire, removing the steel support and the heating resistance wire, removing refractory rock wool wrapped on the periphery of the test piece of the rubber steel plate laminate after the test piece of the rubber steel plate laminate is cooled for 24 hours, checking whether the installation position of the thermocouple temperature sensor and a lead wire work normally, and observing and recording the damage change condition of the test piece of the rubber steel plate laminate after the test piece of the rubber steel plate laminate is subjected to high temperature from the rubber protection layer, the rubber steel plate laminate to a lead core in sequence.
According to the experimental device and the method, the resistance wire is used as a heat source, so that experimental errors which are difficult to control by an open flame heating curve are reduced; the cuboid selection type rubber support and the fireproof rock wool wrapping are adopted to realize a single-side heating mode, so that the internal heat transfer condition of the actual rubber support in the heating process is simulated; the adoption of the lamination deformation fixing clamp generates and keeps the deformation of the rubber steel plate lamination, is more in line with the actual stress condition, improves the experimental accuracy, and solves the problem that the thermal coupling of the rubber support is difficult to realize in a large experimental device. The invention provides a more perfect experimental method for the high-temperature resistance research of the rubber support, and has positive significance in the aspects of building earthquake isolation engineering design, post-disaster building evaluation and the like.
The foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any person skilled in the art may make some changes or modifications to the above-described embodiment without departing from the scope of the present invention.
Claims (10)
1. The experimental research method for the heat conduction performance of the internal structure of the rubber support is characterized by comprising the following steps:
(10) Preparing an experimental test piece: according to the actual structural characteristics of the rubber support and the heat conduction research requirement of the internal structure, preparing an experimental test piece which can be heated by a single side and can monitor internal and external heat transfer in real time; the middle part of the experimental test piece is a rubber steel plate laminated body formed by vulcanizing alternately overlapped steel plate layers and rubber layers, one end of the experimental test piece is provided with a rubber protection layer, the other end of the experimental test piece is provided with a lead core, and all the other surfaces except one end of the rubber protection layer are covered with heat insulation layers;
(20) Controllable single-side heating: the experimental test piece is controllably heated from one end of the rubber protective layer, and the temperature distribution of each position in the experimental test piece is recorded in real time;
(30) Internal thermal conductivity analysis: and analyzing and obtaining the heat conduction mechanism of the internal structure of the rubber support according to the change of the temperature distribution of each part in the experimental test piece along with the single-side heating.
2. The experimental study method of claim 1 wherein:
in the step (20) of controllable unilateral heating, the controllable heating adopts electric heating to air at one end of the rubber protective layer of the experimental test piece.
3. The experimental study method of claim 1 wherein:
in the step (20) of controllable unilateral heating, a plurality of temperature sensors are uniformly arranged on the outer side of the rubber protection layer of the experimental test piece so as to ensure that a heating surface is uniformly heated.
4. The experimental study method of claim 1 wherein:
in the step (20) of controllable unilateral heating, a plurality of temperature sensors are arranged in the experimental test piece along the directions parallel and perpendicular to the heat transfer direction so as to record the temperature distribution of each place in the experimental test piece.
5. The experimental investigation method of claim 1, wherein the method comprises the steps of,
in the step of (20) controllable single-side heating, when the experimental test piece is controllably heated from one end of the rubber protection layer, the experimental test piece can be heated under the following conditions:
the rubber-free protective layer, the lead-free core, and the rubber-free protective layer, the lead-free core and the rubber steel plate laminate are deformed in a staggered manner along the heat transfer direction.
6. The experimental study method of claim 5 wherein:
the dislocation deformation of the rubber steel plate laminated body along the heat transfer direction means that the upper layer and the lower layer of the rubber steel plate laminated body are relatively translated along the heat transfer direction to form dislocation under the conditions that the test piece is provided with a rubber protection layer and a lead core, the rubber protection layer is not provided, the lead core is not provided, and the rubber protection layer is not provided.
7. An apparatus for carrying out the experimental investigation method according to any of claims 1 to 6, characterized in that:
comprises an experimental test piece (1), a heater (2) for controllable single-side heating and a clamp (3) for dislocation deformation of the rubber steel plate laminated body along the heat transfer direction;
the experimental test piece (1) comprises a rubber steel plate laminated body formed by vulcanizing alternately overlapped steel plate layers (11) and rubber layers (12), wherein a rubber protection layer (13) is detachably arranged at one end of the rubber steel plate laminated body, a lead core (14) is detachably arranged at the other end of the rubber protection layer, and heat preservation layers (15) are respectively coated on all the other surfaces except one end of the rubber protection layer;
the test piece also comprises a temperature sensor (23), wherein the temperature sensor (23) is fixed on the surface of the test piece (1) and inside the rubber steel plate laminated body.
8. The apparatus according to claim 7, wherein:
the heater (2) comprises a heating resistance wire (21) and a low-carbon steel bracket (22), wherein two ends of the heating resistance wire (21) are respectively fixed on two round holes of the low-carbon steel bracket (22), and the heating resistance wire (21) is separated from the heated end of the experimental test piece (1) by air.
9. The apparatus according to claim 7, wherein:
the clamp (3) comprises an upper steel plate (31), a lower steel plate (32), a fixing bolt (33), an L-shaped steel rod (34), a telescopic stay rod (35), a left-hand cap (36), a right-hand cap (37) and a fixing nut (38);
the upper steel plate (31) is tightly attached to the upper surface of the experimental test piece (1), is fixed by using a fixing bolt (33), one end of the upper steel plate at least covers the upper end of the rubber protection layer (13), and the other end of the upper steel plate extends beyond the upper end of the lead core (14) and is detachably connected with the upper end of the vertical section of the L-shaped steel rod (34) through a fixing nut (38);
the lower steel plate (32) is tightly attached to the lower surface of the experimental test piece (1), the lower surface is fixed by using the fixing bolt (33), one end of the lower steel plate is covered with the lower end of the rubber protection layer (13), the other end of the lower steel plate extends beyond the lower end of the lead core (14), the lower steel plate is clamped on one end with a groove of the telescopic supporting rod (35), the full-length threads of the telescopic supporting rod (35) are sleeved in the horizontal section of the L-shaped steel rod (34), the left end of the horizontal section of the L-shaped steel rod (34) is abutted by the left-hand cap (36), and the right end of the horizontal section of the L-shaped steel rod (34) is abutted by the right-hand cap (37).
10. The apparatus according to claim 7, wherein:
except one end of the rubber protective layer, all the other surfaces of the experimental test piece (1) are tightly wrapped with 100mm thick aluminum silicate fiber fireproof rock wool for heat insulation.
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Citations (16)
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