CN204269577U - Controlled in wireless armoured concrete slab Fire-resistance test system - Google Patents
Controlled in wireless armoured concrete slab Fire-resistance test system Download PDFInfo
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- CN204269577U CN204269577U CN201420637809.0U CN201420637809U CN204269577U CN 204269577 U CN204269577 U CN 204269577U CN 201420637809 U CN201420637809 U CN 201420637809U CN 204269577 U CN204269577 U CN 204269577U
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Abstract
The utility model discloses a kind of controlled in wireless armoured concrete slab Fire-resistance test system, comprise trial furnace device (1), add loading (2) and data acquisition control device (3), data acquisition control device comprises industrial control computer (31), thermocouple sensor (32), displacement transducer (33), high temperature strain foil sensor (34), wireless receiving and dispatching loop, flame control loop and Data Control show circuit, wireless receiving and dispatching loop comprises signal amplification circuit and one-chip computer module (35), wireless sending module (36) and wireless receiving module (37), thermocouple sensor, displacement transducer is connected with wireless sending module respectively by signal amplification circuit and one-chip computer module with high temperature strain foil sensor, wireless receiving module is connected with industrial control computer.Native system is convenient to the collection of temperature in reinforced concrete breadboard, displacement and strain data, reduces the difficulty that wired mode exists in wiring, data transmission.
Description
Technical field
The utility model relates to a kind of armoured concrete slab Fire-resistance test system, and specifically a kind of controlled in wireless armoured concrete slab Fire-resistance test system, belongs to structural analysis and survey control technology field.
Background technology
Along with China's rapid development of economy, people's living standard and quality are greatly improved, and recent year skyscraper emerges in multitude, and buildings, once catch fire, brings about great losses to the life of people and property.
The fire resistance rating of building element mainly records according to the fire testing of standard, namely regulation Elevated Temperature Conditions, pressure condition, loading environment, require by fiery condition etc. under, detect the component such as wall, post, beam, floor and can meet the requirements such as stability, integrality, thermal insulation, the fire resistance of research existing structure and how to improve building structure by appropriate design, important topic that the fire-resistance capacity of component is current building fire area research.
Reinforced concrete floor is as one of significant levels component in building structure, not only bear the vertical load of structure, also play a part horizontal subdivision, when building breaking out of fire, its fire area is comparatively large, comparatively serious by fire, so reinforced concrete floor fire resistance in a fire in research structure, carry out rational resisting fire design, have great importance.
When the fire-resistance behavior of research concrete slab and fire resistance, along with the collection point of data acquisition system (DAS) get more and more, the type of involved measuring-signal and signal source gets more and more, also more and more higher to the requirement of measuring, because in process of the test, temperature is higher, higher to the requirement of wire rod, the system that present employing cable data is measured and gathered is according to remote-controlled operation, experimentation cost certainly will be strengthened, and there is wiring complexity, function singleness, acquisition channel is few, acquisition rate is low, complicated operation, to the test environment requirement problem such as higher.
Summary of the invention
For above-mentioned prior art Problems existing, the utility model provides a kind of wireless multi-path thermopair armoured concrete slab Fire-resistance test system, the collection of concrete section temperature and reinforcing bar temperature in concrete slab, displacement and strain data can be convenient to, greatly reduce wired mode Problems existing in wiring, data transmission etc.
To achieve these goals, this controlled in wireless armoured concrete slab Fire-resistance test system comprises trial furnace device, adds loading and data acquisition control device;
Described trial furnace device comprises body of heater, drop-bottom, oil supply pipe, integral combustor and discharge flue; Body of heater adopts fire resistive material protection, comprise assembled furnace wall and web member, connected by web member between assembled furnace wall, body of heater is provided with burner mounting hole, steel ball and steel roller bearing are set between body of heater end face and reinforced concrete breadboard, fill the space between steel ball and steel roller bearing with fire resistive material; Drop-bottom is fixedly connected on bottom of furnace body, is provided with exhaust opening above; Oil supply pipe is arranged on body of heater outside around ground, and oil supply pipe is communicated with fuel delivery mechanism and fuel tank; The spout of integral combustor is arranged towards furnace interior, and to be arranged on oil supply pipe through the burner mounting hole on body of heater and to be communicated with oil supply pipe, and the junction of integral combustor and oil supply pipe is installed and is connected with electron servo valve and lighter; Discharge flue is communicated with the exhaust opening of drop-bottom;
The described loading that adds is set to more than one piece, is evenly placed on reinforced concrete breadboard;
Described data acquisition control device comprises industrial control computer, thermocouple sensor, displacement transducer, high temperature strain foil sensor, wireless receiving and dispatching loop, flame control loop and Data Control show circuit etc.; Thermocouple sensor is set to more than one piece, is separately positioned on inboard wall of furnace body and in reinforced concrete breadboard, along inboard wall of furnace body, arranges along reinforced concrete breadboard thickness of slab direction and rebar surface; Displacement transducer is set to more than one piece, is uniformly arranged on reinforced concrete breadboard plate face; High temperature strain foil sensor setting is more than one piece, is uniformly arranged on reinforced concrete breadboard plate face and rebar surface; Wireless receiving and dispatching loop comprises signal amplification circuit and one-chip computer module, wireless sending module and wireless receiving module etc., thermocouple sensor, displacement transducer and high temperature strain foil sensor are electrically connected with signal amplification circuit and one-chip computer module respectively, signal amplification circuit and one-chip computer module are electrically connected with wireless sending module, and wireless receiving module is electrically connected with industrial control computer; Industrial control computer is electrically connected with the electron servo valve on integral combustor and lighter.
As further improvement project, described trial furnace device also comprises water circulating pipe, and water circulating pipe is wrapped in discharge flue outside and is connected with water pump by electron servo valve; Described data acquisition control device also comprises Control for Kiln Temperature loop, and industrial control computer is electrically connected with the electron servo valve on water circulating pipe.
As further improvement of the utility model scheme, described thermocouple sensor adopts K type thermopair.
As further improvement of the utility model scheme, described high temperature strain foil sensor adopts refractory temperature at the superhigh temperature welded encapsulation foil gauge of 950 DEG C.
As further improvement project, described steel ball and steel roller bearing diameter dimension are set to 80 ~ 100 ㎜, and the spacing between steel ball gets 3 ~ 5 times of reinforced concrete breadboard thickness of slab.
As further improvement project, described fire resistive material adopts refractory fiber cotton.
As further improvement project, described body of heater arranges flame-observing hole.
Compared with prior art, this controlled in wireless armoured concrete slab Fire-resistance test system is owing to adopting controlled in wireless mode, therefore the shortcoming such as wiring complexity, function singleness, acquisition channel is few, acquisition rate is low, complicated operation that traditional wire controls armoured concrete slab Fire-resistance test system is overcome, easy to maintenance, applying flexible, reliability are high, and cost is lower; In-furnace temperature adopts thermocouple measurement, can monitor in real time, and can regulate at any time in-furnace temperature, makes in-furnace temperature well can meet the heating curve of ISO834 international standard heating curve or other settings; Be provided with displacement acquisition loop and strain acquirement loop in addition, the parameters such as the inside and outside displacement of board plane and reinforcing bar strain can be measured simultaneously.
Accompanying drawing explanation
Fig. 1 is longitudinal sectional view of the present utility model;
Fig. 2 is the A-A cut-open view of Fig. 1;
Fig. 3 is data acquisition control device connection diagram;
Fig. 4 is the layout schematic diagram of temperature point in breadboard section.
In figure: 1, trial furnace device, 11, body of heater, 12, drop-bottom, 13, oil supply pipe, 14, integral combustor, 15, discharge flue, 16, steel ball, 17, steel roller bearing, 18, water circulating pipe, 2, add loading, 3, data acquisition control device, 31, industrial control computer, 32, thermocouple sensor, 33, displacement transducer, 34, high temperature strain foil sensor, 35, signal amplification circuit and one-chip computer module, 36, wireless sending module, 37, wireless receiving module, 4, reinforced concrete breadboard, 5, fire resistive material, 6, fuel delivery mechanism and fuel tank, 7, water pump.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further.
As shown in Figure 1, Figure 2, shown in Fig. 3, this wireless multi-path thermopair armoured concrete slab Fire-resistance test system comprises trial furnace device 1, adds loading 2 and data acquisition control device 3.
Described trial furnace device 1 comprises body of heater 11, drop-bottom 12, oil supply pipe 13, integral combustor 14 and discharge flue 15;
Body of heater 11 adopts fire resistive material to protect, comprise assembled furnace wall and web member, connected by web member between assembled furnace wall, body of heater 11 is provided with burner mounting hole, steel ball 16 and steel roller bearing 17 are set between body of heater 11 end face and reinforced concrete breadboard 4, as shown in Figure 1, steel ball 16 and steel roller bearing 17, for spacer bar concrete test plate 4, fill the space between steel ball 16 and steel roller bearing 17 with suitable flexible fire resistive material 5;
Drop-bottom 12 is fixedly connected on bottom body of heater 11, is provided with exhaust opening above;
It is outside that oil supply pipe 13 is arranged on body of heater 11 around ground, and oil supply pipe 13 is communicated with fuel delivery mechanism and fuel tank 6;
The spout of integral combustor 14 is arranged towards body of heater 11 inside, and to be arranged on oil supply pipe 13 through the burner mounting hole on body of heater 11 and to be communicated with oil supply pipe 13, integral combustor 14 is installed with the junction of oil supply pipe 13 and is connected with electron servo valve and lighter;
Discharge flue 15 is communicated with the exhaust opening of drop-bottom 12.
The described loading 2 that adds is set to more than one piece, is evenly placed on reinforced concrete breadboard 4.
Described data acquisition control device 3 comprises industrial control computer 31, thermocouple sensor 32, displacement transducer 33, high temperature strain foil sensor 34, wireless receiving and dispatching loop, flame control loop and Data Control show circuit etc.;
Thermocouple sensor 32 is set to more than one piece, is separately positioned on body of heater 11 inwall and in reinforced concrete breadboard 4, along body of heater 11 inwall, arranges along reinforced concrete breadboard 4 thickness of slab direction and rebar surface;
Displacement transducer 33 is set to more than one piece, is uniformly arranged on reinforced concrete breadboard 4 plate face;
High temperature strain foil sensor 34 is set to more than one piece, is uniformly arranged on reinforced concrete breadboard 4 plate face and rebar surface;
Wireless receiving and dispatching loop comprises signal amplification circuit and one-chip computer module 35, wireless sending module 36 and wireless receiving module 37 etc., thermocouple sensor 32, displacement transducer 33 and high temperature strain foil sensor 34 are electrically connected with signal amplification circuit and one-chip computer module 35 respectively, signal amplification circuit and one-chip computer module 35 are electrically connected with wireless sending module 36, and wireless receiving module 36 is electrically connected with industrial control computer 31;
Industrial control computer 31 is electrically connected with the electron servo valve on integral combustor and lighter.
Thermopair utilizes thermoelectric effect to carry out temperature survey, and namely conductor such as thermocouple wire material or the thermode two ends of two kinds of different components are bonded into loop, when the temperature at abutment is different, can produce electromotive force in the loop, i.e. thermoelectrical potential; Displacement meter by a primary coil, two secondary coils, iron core, coil rack, the parts compositions such as shell, when iron core mediates, the induction electromotive force of two secondary coil generations is equal, such output voltage is zero, when portion moves and departs from center iron core in coil, the induction electromotive force that two coils produce not etc., does not have voltage to export, its voltage swing depends on the size of displacement, and linear with displacement; Foil gauge makes based on strain effect, namely when conductor or semiconductor material produce mechanically deform under the effect of external force, its resistance value changes accordingly, be securely fixed in during use on the measuring point of component, because measuring point strains after member stress, sensitive grid also makes its resistance change thereupon being out of shape, then records its resistance variations size by instrumentation, and is converted to the strain value of measuring point.
This controlled in wireless armoured concrete slab Fire-resistance test system before use, first build suitable body of heater 11 according to the size of reinforced concrete breadboard 4 and the miscellaneous parts such as drop-bottom 12, oil supply pipe 13, integral combustor 14 and discharge flue 15 are installed, between body of heater 11 top and breadboard, lay steel ball 16 and steel roller bearing 17, fill the space between steel ball 16 and steel roller bearing 17 with suitable fire resistive material 5;
Then along breadboard 4 thickness of slab direction, multiple thermocouple sensor 32 is set every a segment distance and rebar surface, uniform on reinforced concrete breadboard 4 plate face multiple displacement transducer 33 is set, on reinforced concrete breadboard 4 plate face and rebar surface is uniform arranges multiple high temperature strain foil sensor 34, again by between multiple thermocouple sensor 32, connect with wire respectively between multiple displacement transducer 33 and between multiple high temperature strain foil sensor 34, then be connected with signal amplification circuit and one-chip computer module 35 respectively, then signal amplification circuit and one-chip computer module 35 are connected to wireless sending module 36, finally wireless receiving module 37 is connected with industrial control computer 31 by RS232 interface, industrial control computer 31 is connected with the electron servo valve on integral combustor 14 and lighter by wire, reinforced concrete breadboard 4 is placed with the equivalence of structural design working load add loading 2 as after balancing weight etc., can profit igniting of computerizeing control test.
In process of the test, thermocouple sensor 32 gathers multi way temperature data, displacement transducer 33 gathers multichannel displacement data, high temperature strain foil sensor 34 gathers multichannel displacement data, respectively through signal amplification circuit, cold junction compensation, filtering, after the process such as synchronized sampling maintenance, input Chip Microcomputer A/D interface is changed, temperature data after conversion, displacement data and strain data are transmitted into wireless receiving module 36 by the wireless sending module 36 be connected with single-chip microcomputer respectively, the data that industrial control computer 31 is sent by RS232 interface are also sent to show circuit and are shown.
Generally, the control of furnace temperature can be controlled by flame control loop, namely industrial control computer 31 controls the size of fuel delivery by the folding size that the furnace temperature data that RS232 interface is sent send the electron servo valve that instruction controls on integral combustor 14, but the reduction of body of heater 11 internal temperature controls by means of only reduction fuel delivery, it underspeeds very slow, therefore in order to effectively control furnace temperature fast further, as further improvement of the utility model scheme, described trial furnace device 1 also comprises water circulating pipe 18, it is outside that water circulating pipe 18 is wrapped in discharge flue 15, and be connected with water pump 7 by electron servo valve, described data acquisition control device 3 also comprises Control for Kiln Temperature loop, industrial control computer 31 is electrically connected with the electron servo valve on water circulating pipe 18, by controlling the flow velocity of the folding size controlled circulation water of the electron servo valve on water circulating pipe 18, when furnace temperature height, the flow velocity of recirculated water is accelerated, when furnace temperature is low, close recirculated water, and then realize effectively controlling furnace temperature fast.
Due to K type thermopair, to have the linearity good, and thermopower is comparatively large, highly sensitive, better, antioxygenic property is strong, the advantages such as low price for stability and homogeneity, therefore, as further improvement of the utility model scheme, described thermocouple sensor 32 adopts K type thermopair.
Because in process of the test, furnace temperature is higher, therefore in order to ensure monitor strain effectively, as further improvement of the utility model scheme, described high temperature strain foil sensor 34 adopts refractory temperature at the superhigh temperature welded encapsulation foil gauge of 950 DEG C.
According to GB/T 50152-2012 " Standard for test methods of concrete structures " and GB/T 9978.1-2008 " building element fire testing method ", for the load in guarantor unit's length and enough support degrees, as further improvement of the utility model scheme, described steel ball 16 and steel roller bearing 17 diameter dimension are set to 80 ~ 100 ㎜, and the spacing between steel ball 16 gets 3 ~ 5 times of reinforced concrete breadboard 4 thickness of slab.
Closely knit in order to ensure the fill gaps between steel ball 16 and steel roller bearing 17, as further improvement of the utility model scheme, described fire resistive material 5 adopts refractory fiber cotton.
Combustion case and test specimen for the ease of observing body of heater 1 flame are subject to the situations such as fire, as further improvement of the utility model scheme, described body of heater 11 arrange flame-observing hole.
Embodiment: the length of design reinforced concrete breadboard 4 × wide is of a size of 3600 ㎜ × 2600 ㎜, and thickness of slab is 100 ㎜.Fire-resistance test is carried out to this armoured concrete slab by effect of contraction in face.
Body of heater 11 is made up of 90 ㎜ steel plates (outward) and 200 ㎜ refractory fiber cottons (interior), gross thickness is 300 ㎜, finally determine that the length of body of heater × wide is of a size of 3000 ㎜ × 2000 ㎜, the furnace wall on the every limit of body of heater is evenly arranged two integral combustors 14, diameter is set between body of heater 11 top and reinforced concrete breadboard 4 and is the steel ball 16 of 90 ㎜ and steel roller bearing 17 as support, steel ball spacing gets 400 ㎜ at long side direction, short side direction gets 300 ㎜, fills the space between steel ball 16 and steel roller bearing 17 with refractory fiber cotton; In reinforced concrete breadboard 4, arrange K type thermopair and superhigh temperature welded encapsulation foil gauge, arrange a K type thermopair along thickness of slab direction every 20cm and rebar surface, displacement meter and reinforcing bar foil gauge are arranged in corresponding measuring point; Breadboard 4 plate face is evenly arranged the load thing of 20kg, simulates uniform live load 2KN/ ㎡; Discharge flue 15 and water circulating pipe 18 are all in effective working range, are convenient to smoke evacuation in time and cooling.
Data acquisition control device connection diagram as shown in Figure 3.
In breadboard section, the layout schematic diagram of temperature point as shown in Figure 4.
After circuit connects, debugging correlation test instrument, controls igniting by industrial control computer, starts test, can gather correlation test data.
This controlled in wireless armoured concrete slab Fire-resistance test system can Real-time Collection test in plate inner concrete and reinforcing bar temperature, in the plane of plate, the parameters such as outer displacement and reinforcing bar high-temp strain, owing to adopting controlled in wireless mode, therefore the wiring complexity that traditional wire controls armoured concrete slab Fire-resistance test system is overcome, function singleness, acquisition channel is few, acquisition rate is low, the shortcomings such as complicated operation, easy to maintenance, applying flexible, reliability is high, and cost is lower, the wireless collection of multi way temperature data can be carried out to reinforced concrete breadboard, greatly reduce wired mode in wiring, the aspect Problems existing such as data transmission, in-furnace temperature adopts thermocouple measurement, can monitor in real time, and can regulate at any time in-furnace temperature, makes in-furnace temperature well can meet the heating curve of ISO834 international standard heating curve or other settings.
Claims (7)
1. a controlled in wireless armoured concrete slab Fire-resistance test system, comprises trial furnace device (1), adds loading (2) and data acquisition control device (3); Trial furnace device (1) comprises body of heater (11), drop-bottom (12), oil supply pipe (13), integral combustor (14) and discharge flue (15); Body of heater (11) adopts fire resistive material protection, comprise assembled furnace wall and web member, connected by web member between assembled furnace wall, (11) are provided with burner mounting hole to body of heater, steel ball (16) and steel roller bearing (17) are set between body of heater (11) end face and reinforced concrete breadboard (4), fill the space between steel ball (16) and steel roller bearing (17) with fire resistive material (5); Drop-bottom (12) is fixedly connected on body of heater (11) bottom, is provided with exhaust opening above; It is outside that oil supply pipe (13) is arranged on body of heater (11) around ground, and oil supply pipe (13) is communicated with fuel delivery mechanism and fuel tank (6); The spout of integral combustor (14) is arranged towards body of heater (11) inside, and it is upper and is communicated with oil supply pipe (13) to be arranged on oil supply pipe (13) through the burner mounting hole on body of heater (11), the junction of integral combustor (14) and oil supply pipe (13) is installed and is connected with electron servo valve and lighter; Discharge flue (15) is communicated with the exhaust opening of drop-bottom (12); Add loading (2) and be set to more than one piece, be evenly placed on reinforced concrete breadboard (4); Data acquisition control device (3) comprises industrial control computer (31), flame control loop and Data Control show circuit, and industrial control computer (31) is electrically connected with the electron servo valve on integral combustor and lighter, it is characterized in that,
Described data acquisition control device (3) also comprises thermocouple sensor (32), displacement transducer (33), high temperature strain foil sensor (34) and wireless receiving and dispatching loop; Thermocouple sensor (32) is set to more than one piece, is separately positioned on body of heater (11) inwall and in reinforced concrete breadboard (4), along body of heater (11) inwall, arranges along reinforced concrete breadboard (4) thickness of slab direction and rebar surface; Displacement transducer (33) is set to more than one piece, is uniformly arranged on reinforced concrete breadboard (4) plate face; High temperature strain foil sensor (34) is set to more than one piece, is uniformly arranged on reinforced concrete breadboard (4) plate face and rebar surface; Wireless receiving and dispatching loop comprises signal amplification circuit and one-chip computer module (35), wireless sending module (36) and wireless receiving module (37), thermocouple sensor (32), displacement transducer (33) and high temperature strain foil sensor (34) are electrically connected with signal amplification circuit and one-chip computer module (35) respectively, signal amplification circuit and one-chip computer module (35) are electrically connected with wireless sending module (36), and wireless receiving module (36) is electrically connected with industrial control computer (31).
2. controlled in wireless armoured concrete slab Fire-resistance test system according to claim 1, it is characterized in that, described trial furnace device (1) also comprises water circulating pipe (18), and water circulating pipe (18) is wrapped in discharge flue (15) outside and is connected with water pump (7) by electron servo valve; Described data acquisition control device (3) also comprises Control for Kiln Temperature loop, and industrial control computer (31) is electrically connected with the electron servo valve on water circulating pipe (18).
3. controlled in wireless armoured concrete slab Fire-resistance test system according to claim 1 and 2, is characterized in that, described thermocouple sensor (32) adopts K type thermopair.
4. controlled in wireless armoured concrete slab Fire-resistance test system according to claim 1 and 2, is characterized in that, described high temperature strain foil sensor (34) adopts refractory temperature at the superhigh temperature welded encapsulation foil gauge of 950 DEG C.
5. controlled in wireless armoured concrete slab Fire-resistance test system according to claim 1 and 2, it is characterized in that, described steel ball (16) and steel roller bearing (17) diameter dimension are set to 80 ~ 100 ㎜, and the spacing between steel ball (16) gets 3 ~ 5 times of reinforced concrete breadboard (4) thickness of slab.
6. controlled in wireless armoured concrete slab Fire-resistance test system according to claim 1 and 2, is characterized in that, described fire resistive material (5) adopts refractory fiber cotton.
7. controlled in wireless armoured concrete slab Fire-resistance test system according to claim 1 and 2, is characterized in that, described body of heater (11) arranges flame-observing hole.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420637809.0U CN204269577U (en) | 2014-10-30 | 2014-10-30 | Controlled in wireless armoured concrete slab Fire-resistance test system |
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| CN201420637809.0U CN204269577U (en) | 2014-10-30 | 2014-10-30 | Controlled in wireless armoured concrete slab Fire-resistance test system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106409117A (en) * | 2016-11-24 | 2017-02-15 | 公安部天津消防研究所 | Space structure node fire hazard behavior experiment apparatus and method thereof |
| CN109187254A (en) * | 2018-07-24 | 2019-01-11 | 湖南工业大学 | Reinforced beam fire resistance detection method and fireproof coating fire prevention detection method |
| CN114674972A (en) * | 2022-02-25 | 2022-06-28 | 中国矿业大学 | Method for detecting fireproof performance of cavity floor slab with built-in smoke exhaust and ventilation pipeline |
-
2014
- 2014-10-30 CN CN201420637809.0U patent/CN204269577U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106409117A (en) * | 2016-11-24 | 2017-02-15 | 公安部天津消防研究所 | Space structure node fire hazard behavior experiment apparatus and method thereof |
| CN109187254A (en) * | 2018-07-24 | 2019-01-11 | 湖南工业大学 | Reinforced beam fire resistance detection method and fireproof coating fire prevention detection method |
| CN114674972A (en) * | 2022-02-25 | 2022-06-28 | 中国矿业大学 | Method for detecting fireproof performance of cavity floor slab with built-in smoke exhaust and ventilation pipeline |
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