CN102830009A - Large member thermal expansion test machine - Google Patents
Large member thermal expansion test machine Download PDFInfo
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- CN102830009A CN102830009A CN 201110173705 CN201110173705A CN102830009A CN 102830009 A CN102830009 A CN 102830009A CN 201110173705 CN201110173705 CN 201110173705 CN 201110173705 A CN201110173705 A CN 201110173705A CN 102830009 A CN102830009 A CN 102830009A
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Abstract
The invention discloses a large member thermal expansion test machine which enables building members to undergo high temperature loading tests to measure the thermal expansion rate and the thermal stress of the members. The machine comprises a loading frame, a hydraulic system, a measure control system, a high temperature furnace and its support, and a test piece positioning device, wherein the loading frame comprises a left crossbeam and a right crossbeam, the left and right crossbeams are connected and fixed through four bearing pillars to form a closed frame, and one of the crossbeams of the loading frame is provided with a loading oil cylinder; the high temperature furnace comprises a furnace body and a furnace cover which can be separated from each other, the two right walls of the furnace body are respectively provided with a window, a furnace body support is arranged under the furnace body, and the lower part of the furnace body support is provided with rollers; the support comprises a support body, the support body is provided with a guide rail, and height adjustment mechanisms are arranged under the support body; and the test piece positioning device comprises a positioning rack, a bearing, a screw and a nut, the furnace body support is connected with the screw through the nut arranged thereon, and the screw is connected with the positioning rack through the bearing.
Description
Technical field
The present invention relates to the testing machine field, be specifically related to a kind of large-scale component thermal expansion test device.
Background technology
Industry and covil construction are when breaking out of fire, and its building structure intensity and load-bearing capacity at high temperature will determine buildings to resist the ability of fire, influence directly also that personnel withdraw, the goods and materials transfer, and the reasonable formulation and the enforcement of emergency measure such as put out the fire.Under hot conditions, the member generation thermal expansion in the buildings is because constraint each other between the member; Each component inside produces very big thermal stress, simultaneously, and along with temperature raises; Building element, especially hardware intensity significantly reduces; Load-bearing capacity declines to a great extent, and emergentness and unpredictability that these factors cause buildings under the breaking out of fire situation, to collapse make the fire extinguishing rescue face very big risk.
Summary of the invention
The invention provides a kind of large-scale component thermal expansion test machine; It can carry out the high temperature load test to building element; Measure member coefficient of thermal expansion and thermal stress; The research load-bearing capacity of member under hot conditions predicted its critical failure condition, for Building Fire Protection designs, New Building Materials development, building operation and fire-fighting scientific research and commanding provide scientific basis.
The present invention adopts the basic design of technical scheme to be: a kind of large-scale component thermal expansion test machine; Comprise and load frame, hydraulic system, Measurement and Control System, high temperature furnace and support thereof, test specimen locating device; Load frame and comprise left and right sides crossbeam; Fixing by four pressure-bearing posts connections, thus constitute a closed frame, wherein on the crossbeam load cylinder is installed in the loading frame; High temperature furnace comprises separable body of heater and bell, and the positive wall in the two sides of body of heater all is provided with window, is provided with furnace body support below the body of heater, and roller is installed in the furnace body support bottom; Support comprises stake body, height control mechanism is set below the stake body upper mounting rail, stake body; The test specimen locating device comprises locating rack, bearing, screw rod, screw, the screw connecting screw rod of furnace body support through installing on it, and screw rod also connects locating rack through bearing.
The invention has the beneficial effects as follows, for System for Large-scale Specimen, particularly special-shaped, irregular test specimen; The loading and unloading test specimen is inconvenient; And might occurrence of tilting when test specimen is disrumpent feelings in process of the test, there is potential safety hazard, adopt horizontal loading frame to solve the problems referred to above preferably; When carrying out hot test; High temperature furnace shifts out in can be along support guide from test space, with hanging device is auxiliary System for Large-scale Specimen is installed in the high temperature furnace, and then high temperature furnace is back in the test space; Use after the test with quadrat method dismounting sample; High temperature furnace is designed to back down, the penetration type structure, and can move along support guide, makes things convenient for the installation of large-scale component sample; The test specimen locating device has function of regulating height thereof, after the compacting of test specimen stand under load, can reduce height, locating device and test specimen is thrown off, thereby eliminate the influence of friction force to test findings fully.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is for loading the rack construction synoptic diagram;
Fig. 3 is the front view of high temperature furnace and support;
Fig. 4 is the vertical view of high temperature furnace and support;
Fig. 5 is a test specimen positioning device structure synoptic diagram.
Among the figure: load right crossbeam 104 bodies of heater 401 bells 402 windows 403 furnace body supports 404 rollers 405 stake bodies 406 guide rails of the left crossbeam of frame 1 hydraulic system 2 Measurement and Control System 3 high temperature furnace mechanisms 4 test specimen locating devices 5 101 load cylinders, 102 pressure-bearing posts 103 407 height control mechanisms 408 high temperature furnaces, 409 supports, 410 locating racks, 501 bearings, 502 screw rods, 503 screws 504
Embodiment
As shown in Figure 1, the present invention forms by loading frame 1, hydraulic system 2, Measurement and Control System 3 and high temperature furnace mechanism 4, test specimen spare locating device 5 etc.
The loading frame is as shown in Figure 2; Left and right crossbeam 101,104 connects fixing by four pressure-bearing posts 103; Thereby constitute a closed frame, wherein on the crossbeam load cylinder 102 is installed, can apply large-scale component and press to load in the loading frame; Installed load sensor and deformation-sensor on another crossbeam can be measured suffered load of member and the distortion that is produced simultaneously in the process of the test.Space between 101,104 and four pressure-bearing posts 103 of left and right crossbeam is a test space, is used to place high temperature furnace 409 and member to be tested is installed.
Building element, particularly concrete component belongs to hard brittle material, in the pressurized tests process, destroys until test specimen, and its bulk deformation is very little.When the usual pressure testing machine carries out the System for Large-scale Specimen compression test, adopt usually along test specimen length and get middle one section (gauge length), measure the enterolithic method of test specimen gauge length scope, do not measure the test specimen bulk deformation, so testing machine loading rigidity of frame does not need very high.The present invention is the stressed and deformation condition of real simulation member under indeterminate constraint and hot conditions; Test specimen is carried out the integral body heating; Measure test specimen bulk deformation and thermal stress simultaneously; The distortion of frame own will produce obviously influence to measurement result, therefore testing machine loaded rigidity of frame and require very high.Loading four major diameter structural steel of frame 1 employing is that pressure-bearing post 103 and integral cast steel box crossbeam 101,104 are formed the ultrahigh rigidity frames, and the complete machine rigidity surpasses 1mm/GN.Almost can ignore in the distortion of process of the test mid frame own, can well satisfy the test needs.
Fig. 3, Fig. 4 are the front view and the vertical view of high temperature furnace 409 and support 410.High temperature furnace 409 comprises separable body of heater 401 and bell 402, and the positive wall in the two sides of body of heater 401 all is provided with window 403, is provided with furnace body support 404 below the body of heater 401, and roller 405 is installed in furnace body support 404 bottoms; Support 410 comprises stake body 406; Stake body 406 upper mounting rails 407; Height control mechanism 408 is set below the stake body 406, and high temperature furnace 409 can move along the guide rail on the support 410 407, support 410 positions and adjustable height; Support 410 is installed on the ground, and adopts bolt and loading frame 1 to link into an integrated entity.When carrying out hot test, earlier high temperature furnace 409 is shifted out in along the guide rail on the support 410 407 from test space, with hanging device is auxiliary System for Large-scale Specimen is installed in the high temperature furnace 409, and then high temperature furnace 409 is back in the test space.Use after the test with quadrat method dismounting sample.
Fig. 5 is a test specimen locating device 5.Test specimen locating device 5 comprises locating rack 501, bearing 502, screw rod 503, screw 504, and screw 504 connecting screw rods 503 of furnace body support 404 through installing on it, screw rod 503 also connect locating rack 501 through bearing 502.On test specimen locating device 5 was installed at the bottom of the high temperature furnace, test specimen locating device 5 had function of regulating height thereof, can adapt to different size member sample; Realize test specimen spare and load cylinder 102 center line centerings; Can the whole picking-up of test specimen after the compacting of test specimen stand under load, can be reduced height; Test specimen locating device 5 and test specimen are thrown off, thereby eliminate the influence of friction force fully test findings.
Test model of the present invention generally can be divided into two kinds:
Pattern one: in the buildings, link into an integrated entity through modes such as welding, riveted joint, bolts between the member, constrained each other between the member, form a hyperstatic structure.Under the normal condition, both there had been certain internal stress in member.In order to simulate the true stressing conditions of member, at first member is applied certain load value of pressing to during test, and in process of the test subsequently, keep this load value constant always by loading system.Under the constant condition of load value member is heated keeping, measure its thermal expansion distortion situation.In the process of the test, along with temperature raises, member generation thermal expansion, owing to be the Load Control pattern, electrohydraulic servo-controlling system will be adjusted load cylinder 102 piston positions automatically, the maintenance energy value is constant.
Pattern two: during test, at first member is applied the load of pressing to of certain value, make it that certain distortion take place, and in process of the test subsequently, keep this deflection always by loading system.At this moment, there has been certain internal stress in member itself.Subsequently member is heated, measure the thermal stress that it produces under heating condition.In the process of the test, along with temperature raises, member generation thermal expansion, owing to be the displacement control model, it is constant that electrohydraulic servo-controlling system is kept piston position, and member expands limited, and the member internal stress will significantly increase, and the internal stress added value is a thermal stress.
Under two kinds of test models, high temperature furnace 409 all can be set the step heating for, or the circulation heating.Heating parameters is set through PLC, and parameters such as temperature, time all are presented on the computer screen of Measurement and Control System 3 synchronously.
Claims (1)
1. large-scale component thermal expansion test machine; Comprise and load frame (1), hydraulic system (2), Measurement and Control System (3), high temperature furnace mechanism (4), test specimen locating device (5); It is characterized in that, load frame (1) and comprise left and right crossbeam (101,104), connect fixing by four pressure-bearing posts (103); Thereby constitute a closed frame, wherein on the crossbeam load cylinder (102) is installed in loading frame (1); High temperature furnace mechanism (4) is made up of high temperature furnace (409) and support (410) thereof; High temperature furnace (409) comprises separable body of heater (401) and bell (402), and the positive wall in two sides of body of heater (401) all is provided with window (403), is provided with furnace body support (404) below the body of heater (401); Roller (405) is installed in furnace body support (404) bottom; Support (410) comprises stake body (406), height control mechanism (408) is set below stake body (406) upper mounting rail (407), stake body (406); Test specimen locating device (5) comprises locating rack (501), bearing (502), screw rod (503), screw (504), screw (504) connecting screw rod (503) of furnace body support (404) through installing on it, and screw rod (503) also connects locating rack (501) through bearing (502).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110173705 CN102830009A (en) | 2011-06-14 | 2011-06-14 | Large member thermal expansion test machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110173705 CN102830009A (en) | 2011-06-14 | 2011-06-14 | Large member thermal expansion test machine |
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| Publication Number | Publication Date |
|---|---|
| CN102830009A true CN102830009A (en) | 2012-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110173705 Pending CN102830009A (en) | 2011-06-14 | 2011-06-14 | Large member thermal expansion test machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112179668A (en) * | 2020-09-18 | 2021-01-05 | 中国航发四川燃气涡轮研究院 | Thermal state performance test protection device for gas turbine engine component |
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2011
- 2011-06-14 CN CN 201110173705 patent/CN102830009A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112179668A (en) * | 2020-09-18 | 2021-01-05 | 中国航发四川燃气涡轮研究院 | Thermal state performance test protection device for gas turbine engine component |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Application publication date: 20121219 |