CN109916734A - Visualize high-temperature test device and application method - Google Patents

Visualize high-temperature test device and application method Download PDF

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Publication number
CN109916734A
CN109916734A CN201910233007.0A CN201910233007A CN109916734A CN 109916734 A CN109916734 A CN 109916734A CN 201910233007 A CN201910233007 A CN 201910233007A CN 109916734 A CN109916734 A CN 109916734A
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China
Prior art keywords
furnace
test
temperature
test specimen
specimen
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Application number
CN201910233007.0A
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Chinese (zh)
Inventor
孙毅
王玲玲
霍静思
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Huaqiao University
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Huaqiao University
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Priority to CN201910233007.0A priority Critical patent/CN109916734A/en
Publication of CN109916734A publication Critical patent/CN109916734A/en
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Abstract

The invention discloses visualization high-temperature test device and application methods, the device includes test board, hot test furnace, high-temperature extensometer, hot test furnace is mounted on test board, it includes the first furnace body and the second furnace body, first furnace body and the second furnace body form therebetween a heating chamber in the closure state, and first furnace body or with the second furnace body be equipped with observation window;High-temperature extensometer is mounted on test board, has guide rod of extending;The assembly that test specimen two ends and test board can be assembled and disassembled, test specimen is between the first furnace body and the second furnace body, and when test specimen is located in heating chamber in the closure state for the first furnace body and the second furnace body, guide rod of extending passes through the first furnace body, the second furnace body or observation window and is in contact with test specimen.Staff can observe bearing capacity change, stress variation etc. of the test specimen during being heated by observation window.It is measured simultaneously by stress variation of the high-temperature extensometer to test specimen, it is known that test specimen is at high temperature to the deformation before stress destruction.

Description

Visualize high-temperature test device and application method
Technical field
The invention belongs to steel structure fireproofing technical fields, and in particular to visualization high-temperature test device and application method, tool Body refer to it is a kind of can under different high-temperature conditions, measure steel mechanical property at high temperature and can observe its deformation with And a kind of device and application method of some other experimental phenomenas.
Background technique
Fire occurs for steel building will lead to serious consequence often, and the fire-resistance of steel construction has increasingly caused people's Note that so being also particularly important for the resisting fire design of steel construction.Fire-Resistance of Steel Structures difference is first is that because steel are thermally conductive Performance is good, and fire lower member is brought rapidly up, second is that steel strength is increased with temperature and reduced rapidly, steel member bearing capacity is caused to drop It is low and fail.Previous research is concerned with the bearing capacity of connection, and can not observe the variation of the bearing capacity of steel member.
And in fact, the deformability of steel member is also critically important.On the one hand, deformability is enough, the node ability of steel Preferably effect is played, is such as connected with, each bolt can uniform stressed just;On the other hand, it is connected under high temperature Bearing capacity determine turning power, and enough turning powers are beam catenary effect and the base that floor film effect plays Plinth.
Summary of the invention
The present invention provides visualization high-temperature test device and application method, which overcome background technique it is existing not Foot.The present invention solve the used technical solution of its technical problem first is that:
High-temperature test device is visualized, it includes:
Test board;
Test board can be mounted on comprising mutually open and close the first of connection to the hot test furnace that test specimen is heated Furnace body and the second furnace body, the first furnace body and the second furnace body form therebetween a heating chamber in the closure state, and, described One furnace body is equipped with observation window with the second furnace body;
It is capable of measuring the high-temperature extensometer of test piece deformation ability, is mounted on test board, there is guide rod of extending;
Test specimen two ends and the assembly that can assemble and disassemble of test board, test specimen, and ought the positioned at the first furnace body and the second furnace body between Test specimen is located in heating chamber in the closure state for one furnace body and the second furnace body, and guide rod of extending passes through the first furnace body, the second furnace body Or observation window is in contact with test specimen.
Among one preferred embodiment: first furnace body is equipped with the first heating tank, and the second furnace body is equipped with the second heating tank, when The first heating tank and the second heating tank form the heating chamber in the closure state for first furnace body and the second furnace body.
Among one preferred embodiment: the heating chamber shape matches with Specimen Shape.
Among one preferred embodiment: first furnace body and the second furnace body are equipped with observation window.
Among one preferred embodiment: the observation window of second furnace body is equipped with perforation, and the guide rod of extending passes through perforation and stretches Enter in heating chamber.
Among one preferred embodiment: being equipped with hinge between first furnace body and the second furnace body, and outside first furnace body Side is equipped with buckle, the card slot that can be mutually engaged by clamping with buckle is equipped on the outside of the second furnace body, by buckling the clamping engagement with card slot And the cooperation of hinge can link together the first furnace body and the second furnace body with opening and closing.
Among one preferred embodiment: the test specimen is strip, and the middle part of the test specimen is located at the first furnace body and the second furnace Between body.
The present invention solve the used technical solution of its technical problem second is that: application above-mentioned any one described in can Application method depending on changing high-temperature test device, comprising:
Step 1, the size for selecting reasonable test specimen processes test specimen in processing factory according to the requirement of size;
Step 2, hot test furnace is mounted on test board, high-temperature extensometer is mounted on test board;
Step 3, then by test specimen two ends and test board mutually assemble, at this point, test specimen be located at the first furnace body and the second furnace body it Between;
Step 4, the first furnace body and the second furnace body are closed;
Step 5, hot test furnace heating rate is set as 15 DEG C/min;
Step 6, when on-test, hot test furnace is risen to 30 DEG C lower than assigned temperature by setting heating rate first, Constant temperature 10min, heating and thermostatic process sets test board load as zero, that is, allow test specimen free wxpansion;Then high temperature is tried It tests that furnace is set to target temperature and maintenance 20 minutes are loaded again, is to ensure that temperature is uniformly distributed using the method, prevent Only temperature is more than target temperature;
Step 7, it after reaching assigned temperature, is loaded by universal test board, loading procedure keeps temperature constant, strain Rate 0.25%/min, until test specimen is broken;
Step 8, acquired by the data of high-temperature extensometer, the stress strain curve of test specimen can be obtained, by data from It is exported in computer, and the apparent situation of change of test specimen in test whole process is obtained by observation window, that is, observable.
The technical program compared with the background art, it has the following advantages:
Since trial furnace is equipped with observation window, while heating to test specimen, staff can be seen by observation window Bearing capacity change, stress variation etc. of the test specimen during being heated are examined, the apparent change of test specimen in the whole process can be observed Change.Meanwhile being measured by stress variation of the high-temperature extensometer to test specimen, it is known that test specimen arrives stress destruction at high temperature Preceding deformation may be implemented to estimate deformation of the steel under high temperature before bearing capacity damage, mention for Fire-resistance of Steel Structures For data just, reduce harm of the fire to construction steel structure, fire extinguishing caused by avoiding structure from locally collapsing in a fire and Casualties caused by total Collapse in evacuating personnel difficulty and fire, reduces rehabilitation expense after calamity, and steel construction carries out science Structure fire resistant design.And the device is easy to operate.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 depicts the overall structure diagram of the device.
Fig. 2 depicts hot test furnace structural schematic diagram in the open state.
Fig. 3 depicts the structural schematic diagram that hot test furnace is in closed state.
Fig. 4 depicts the structural schematic diagram of test specimen.
Specific embodiment
Fig. 1 to Fig. 4 is please referred to, a preferred embodiment of high-temperature test device, the visualization hot test are visualized Device, it includes test board 10, hot test furnace 20 and high-temperature extensometer 30.
In the present embodiment, test board 10 uses universal test board.As shown in Figure 1.Test 10 top of board is provided with Two the first fixture blocks 11, there are two the second fixture blocks 12 for bottom end setting.Test board 10 is additionally provided with support frame 13 and fixed plate 14.
Hot test furnace 20 can heat test specimen 40, be mounted on test board 10 comprising mutually folding connects First furnace body 21 and the second furnace body 22, the first furnace body 21 and the second furnace body 22 form therebetween a heating in the closure state Chamber 23, and, first furnace body 21 or with the second furnace body 22 be equipped with observation window 24.As shown in Figure 1, hot test furnace 20 is mounted on On support frame 13.Welding can be passed through between hot test furnace 20 and support frame 13 by bolt interlocking or also.
In the present embodiment, first furnace body 21 is equipped with the first heating tank 211, and the second furnace body 22 is equipped with the second heating tank 221, when the first heating tank 211 and the second heating tank 221 form institute in the closure state for the first furnace body 21 and the second furnace body 22 The heating chamber 23 stated.
In the present embodiment, 23 shape of heating chamber matches with 40 shape of test specimen.Alternatively, 23 size of heating chamber is big In 40 size of test specimen, with the various sample dimensions of wildcard.
In the present embodiment, first furnace body 21 and the second furnace body 22 are equipped with observation window 24.
In the present embodiment, the observation window 24 of second furnace body 22 is equipped with perforation 241, and the guide rod 31 of extending passes through perforation 241 protrude into heating chamber 23.
In the present embodiment, hinge is equipped between first furnace body 21 and the second furnace body 22, and outside first furnace body 21 Side is equipped with buckle 212, and the card slot (not shown) that can be engaged by clamping with 212 phases of buckle is equipped on the outside of the second furnace body 22, is passed through First furnace body 21 and the second furnace body 22 can be connected to one with opening and closing with the clamping engagement of card slot and the cooperation of hinge by buckle 212 It rises.
High-temperature extensometer 30 is capable of measuring 40 deformability of test specimen, is mounted on test board 10, has guide rod 31 of extending. As shown in Figure 1, high-temperature extensometer is mounted in fixed plate.Bolt interlocking or clamping can be passed through between high-temperature extensometer and fixed plate Mode assembled.
40 both ends of test specimen and the assembly that can assemble and disassemble of test board 10, test specimen 40 be located at the first furnace body 21 and the second furnace body 22 it Between, and when test specimen 40 is located in heating chamber 23 in the closure state for the first furnace body 21 and the second furnace body 22, guide rod 31 of extending is worn The first furnace body 21, the second furnace body 22 or observation window 24 is crossed to be in contact with test specimen 40.As shown in Figure 1, the upper end of test specimen 40 protrudes into two It is clamped between a first fixture block 11 and by two the first fixture blocks 11,40 lower end of test specimen is protruded between two the second fixture blocks 12 and led to Two the second fixture blocks 12 are crossed to clamp.
In the present embodiment, the test specimen 40 is strip and its middle part indent, and the middle part of the test specimen 40 is located at the first furnace Between body 21 and the second furnace body 22.
Steps are as follows for the use of the device:
1. selection is reasonable according to the requirement of size in " Metal Materials At High Temperature stretching test method GB/T 4338-2006 " The size of test specimen 40 processes test specimen 40 in processing factory according to the requirement of size;
2. then, hot test furnace 20 is mounted on the support frame 13 of test board 10, high-temperature extensometer 30 is installed In the fixed plate 14 of test board 10;
3. again clamping on 40 top of test specimen by two the first fixture blocks 11,40 bottom end of test specimen passes through two the second fixture block 12 folders Tightly, at this point, in the middle part of test specimen 40 between the first furnace body 21 and the second furnace body 22;
4. the first furnace body 21 and the second furnace body 22 are closed, and the two is fastened admittedly by the clamping engagement of buckle and card slot It is fixed;
5. 20 heating rate of hot test furnace is set as 15 DEG C/min;
6. when on-test, hot test furnace 20 is risen to 30 DEG C lower than assigned temperature by setting heating rate first, perseverance Warm 10min, heating and thermostatic process sets test 10 load of board as zero, that is, allow test specimen free wxpansion;Then high temperature is tried It tests that furnace 20 is set to target temperature and maintenance 20 minutes are loaded again, is to ensure that temperature is uniformly distributed using the method, Preventing temperature is more than target temperature;
7. after reaching assigned temperature, being loaded by universal test board, loading procedure keeps temperature constant, strain rate 0.25%/min, until test specimen 40 is broken;
8. acquiring by the data of high-temperature extensometer 30, the stress strain curve of test specimen 40 can be obtained, by data from It is exported in computer, and is the apparent variation feelings of test specimen 40 during the entire process of observable is tested by observation window 24 Condition.
The above is only the preferred embodiment of the present invention, the range implemented of the present invention that therefore, it cannot be limited according to, i.e., according to Equivalent changes and modifications made by the invention patent range and description, should still be within the scope of the present invention.

Claims (8)

1. visualizing high-temperature test device, it is characterised in that: it includes:
Test board;
Test board can be mounted on to the hot test furnace that test specimen is heated comprising mutually open and close the first furnace body of connection With the second furnace body, the first furnace body and the second furnace body form therebetween a heating chamber in the closure state, and, first furnace Body is equipped with observation window with the second furnace body;
It is capable of measuring the high-temperature extensometer of test piece deformation ability, is mounted on test board, there is guide rod of extending;
The assembly that test specimen two ends and test board can be assembled and disassembled, test specimen work as the first furnace between the first furnace body and the second furnace body Test specimen is located in heating chamber in the closure state for body and the second furnace body, and guide rod of extending passes through the first furnace body, the second furnace body or sight Window is examined to be in contact with test specimen.
2. visualization high-temperature test device according to claim 1, it is characterised in that: first furnace body is equipped with first and adds Heat channel, the second furnace body are equipped with the second heating tank, when the first furnace body and the second furnace body the first heating tank and the in the closure state Two heating tanks form the heating chamber.
3. visualization high-temperature test device according to claim 2, it is characterised in that: the heating chamber shape and test specimen shape Shape matches.
4. visualization high-temperature test device according to claim 1, it is characterised in that: first furnace body and the second furnace body It is equipped with observation window.
5. visualization high-temperature test device according to claim 4, it is characterised in that: the observation window of second furnace body is set There is perforation, the guide rod of extending passes through perforation and protrudes into heating chamber.
6. visualization high-temperature test device according to claim 1, it is characterised in that: first furnace body and the second furnace body Between be equipped with hinge, and buckle is equipped on the outside of first furnace body, being equipped on the outside of the second furnace body can mutually be engaged by clamping with buckle First furnace body and the second furnace body can be connected to by buckling with the clamping engagement of card slot and the cooperation of hinge by card slot with opening and closing Together.
7. visualization high-temperature test device according to claim 1, it is characterised in that: the test specimen is strip, described The middle part of test specimen is between the first furnace body and the second furnace body.
8. the application method of visualization high-temperature test device described in any one of application claim 1 to 7, feature exist In: include:
Step 1, the size for selecting reasonable test specimen processes test specimen in processing factory according to the requirement of size;
Step 2, hot test furnace is mounted on test board, high-temperature extensometer is mounted on test board;
Step 3, it then by test specimen two ends and test board mutually assembles, at this point, test specimen is between the first furnace body and the second furnace body;
Step 4, the first furnace body and the second furnace body are closed;
Step 5, hot test furnace heating rate is set as 15 DEG C/min;
Step 6, when on-test, hot test furnace is risen to 30 DEG C lower than assigned temperature by setting heating rate first, constant temperature 10min, heating and thermostatic process sets test board load as zero, that is, allow test specimen free wxpansion;Then by hot test furnace It is set to target temperature and maintenance 20 minutes is loaded again, be to ensure that temperature is uniformly distributed using the method, prevent temperature Degree is more than target temperature;
Step 7, it after reaching assigned temperature, is loaded by universal test board, loading procedure keeps temperature constant, strain rate 0.25%/min, until test specimen is broken;
Step 8, it is acquired by the data of high-temperature extensometer, the stress strain curve of test specimen can be obtained, by data from computer Middle export, and the apparent situation of change of test specimen in test whole process is obtained by observation window, that is, observable.
CN201910233007.0A 2019-03-26 2019-03-26 Visualize high-temperature test device and application method Pending CN109916734A (en)

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Application Number Priority Date Filing Date Title
CN201910233007.0A CN109916734A (en) 2019-03-26 2019-03-26 Visualize high-temperature test device and application method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910233007.0A CN109916734A (en) 2019-03-26 2019-03-26 Visualize high-temperature test device and application method

Publications (1)

Publication Number Publication Date
CN109916734A true CN109916734A (en) 2019-06-21

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110320111A (en) * 2019-08-02 2019-10-11 河南工程学院 A kind of tension test part, tensile test apparatus and stretching test method
CN110320110A (en) * 2019-08-02 2019-10-11 河南工程学院 A kind of tensile test apparatus and heating device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110320111A (en) * 2019-08-02 2019-10-11 河南工程学院 A kind of tension test part, tensile test apparatus and stretching test method
CN110320110A (en) * 2019-08-02 2019-10-11 河南工程学院 A kind of tensile test apparatus and heating device

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