CN103344487B - Device for low-temperature stretching test of metal material - Google Patents
Device for low-temperature stretching test of metal material Download PDFInfo
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- CN103344487B CN103344487B CN201310288579.1A CN201310288579A CN103344487B CN 103344487 B CN103344487 B CN 103344487B CN 201310288579 A CN201310288579 A CN 201310288579A CN 103344487 B CN103344487 B CN 103344487B
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Abstract
The invention discloses a device for a low-temperature stretching test of a metal material. The device comprises a box body device for containing samples, a liquid nitrogen device system for cooling and a temperature control system for controlling the test temperature, wherein the box body device comprises an inner layer, a middle protection layer, an outer layer, a base and a box cover; the liquid nitrogen device system comprises a liquid nitrogen tank, a guide pipe, a guide pipe interface, an internal liquid nitrogen pipe, a gasification net and a liquid discharging valve; the temperature control system consists of a temperature sensor and a temperature control adjustment system. The device is simple and convenient to operate, reasonable in design, uniform in temperature and accurate in test results, can be used for accurately controlling the test temperature to range from 0 DEG C to minus 196 DEG C, omitting the trouble of modifying an existing stretching test machine and saving the cost, and is safe and efficient.
Description
Technical field
The present invention relates to a kind of test unit, specifically a kind of device for the test of metal material cryogenic tensile.
Background technology
Along with the develop rapidly of modern every profession and trade, increasing steel need to use in low temperature environment, as low-temperature pressure container, bridge, building materials low temperature screw-thread steel etc., therefore the Measurement accuracy for every mechanical property of these materials also just seems most important, especially yield strength, tensile strength, the tensile property index such as extensibility and reduction of area of sample.And material mechanical property at low ambient temperatures measures especially tension test, because the restriction of equipment and correlated condition never has an accurate easy measuring method.
The temperature of liquid nitrogen is subzero 196 degree, can directly measure in a liquid for the sample of performance measuring subzero 196 degree, but when sample to be tested performance temperature scope 0 DEG C ~ (-196 DEG C) time, very difficult temperature accurately to be controlled.
Summary of the invention
The object of the present invention is to provide a kind of device for the test of metal material cryogenic tensile, this device utilizes liquid nitrogen to carry out temperature control, can accurately test in 0 DEG C ~ (-196 DEG C) scope by control temperature, simple to operation, reasonable in design, test result is accurate, without the need to transforming existing cupping machine, cost-saving, there is feature safely and efficiently.
The object of the invention is to be achieved through the following technical solutions:
A kind of device for the test of metal material cryogenic tensile, it is characterized in that: this device comprises box body device, the temperature-controlling system for the liquid nitrogen plan system that cools and Control experiment temperature of placing sample, described box body device comprises casing and is arranged on the case lid of casing upper end, described casing comprises internal layer and skin, and is arranged on the heat-insulation layer in the middle of internal layer and skin; The fixed connection shaft for installing sample additional is provided with at case lid and bottom half; Liquid nitrogen plan system comprises liquid nitrogen container, liquid nitrogen conduit, inner liquid nitrogen pipe, gasification net and tapping valve, described liquid nitrogen container is connected with inner liquid nitrogen pipe by liquid nitrogen conduit, inner liquid nitrogen pipe and gasification net are arranged in casing, and fixed connection shaft is positioned at gasification net inner side, tapping valve is arranged on lower box; Described temperature-controlling system comprises temperature sensor and temperature controlling and regulating system, and temperature sensor is connected on casing, and one end of temperature sensor extend into box house, and the other end is connected with temperature controlling and regulating system.
In the present invention, internal layer and skin are made by stainless steel.Heat-insulation layer is polyurethane thermal insulation board.Handle is provided with in both sides, casing top.The encapsulant for insulation is provided with between casing and case lid.Described casing is right cylinder, and case lid is made up of two semicircle lids, and fixed connection shaft is arranged on the centre position of case lid and bottom half.Casing is provided with catheter interface, and liquid nitrogen conduit is connected with inner liquid nitrogen pipe by catheter interface.
In the present invention, box body device is used for placing sample, and box house is main body sample chamber, and liquid nitrogen plan system is used for cooling, and temperature-controlling system is used for Control experiment temperature.Described inner liquid nitrogen pipe is used for making liquid nitrogen gasification, and tapping valve is used for raffinate complete for experiment to discharge.
The present invention has the following advantages:
1, adopt aerosol cooling, prevent liquid nitrogen from directly acting on sample, ensure that the requirement of chilling temperature homogeneity;
2, good heat insulating, temperature fluctuation is little, and measurement result is accurate;
3, can be used for the tension test of arbitrary temp in measurement 0 DEG C ~ (-196 DEG C) scope;
4, the sample tensile test of all size can be carried out;
5, casing conveniently moving, simple to operate, safe and efficient.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Be labeled as in figure: the inner liquid nitrogen pipe of 1-box body device, 2-liquid nitrogen plan system, 3-temperature-controlling system, 11--casing, 111-internal layer, 112-moderate soak layer, 113--skin, 12-case lid, 13-catheter interface, 14--handle, 15--fixed connection shaft, 21-liquid nitrogen container, 22-liquid nitrogen conduit, 23-, 24-gasify net, 25-tapping valve, 31-temperature sensor, 32-temperature controlling and regulating system.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail,
A kind of device for the test of metal material cryogenic tensile of the present invention, comprise box body device 1, the temperature-controlling system 3 for the liquid nitrogen plan system 2 that cools and Control experiment temperature of placing sample, box body device 1 comprises casing 11 and is arranged on the case lid 12 of casing 11 upper end, is provided with the encapsulant for insulation between casing and case lid.Casing comprises internal layer 111 and outer 113, and is arranged on the heat-insulation layer 112 in the middle of internal layer and skin; Internal layer and skin are made by stainless steel.Heat-insulation layer is polyurethane thermal insulation board.Handle 14 is provided with in both sides, casing top.The fixed connection shaft 15 for installing sample additional is provided with at case lid and bottom half; Casing is right cylinder, and case lid is made up of two semicircle lids, and fixed connection shaft is arranged on the centre position of case lid and bottom half.Liquid nitrogen plan system 2 comprises liquid nitrogen container 21, liquid nitrogen conduit 22, inner liquid nitrogen pipe 23, gasification net 24 and tapping valve 25, liquid nitrogen container is connected with inner liquid nitrogen pipe by liquid nitrogen conduit, inner liquid nitrogen pipe and gasification net are arranged in casing, and fixed connection shaft is positioned at gasification net inner side, tapping valve is arranged on lower box; Casing is provided with catheter interface 13, and liquid nitrogen conduit is connected with inner liquid nitrogen pipe by catheter interface.Temperature-controlling system 3 comprises temperature sensor 31 and temperature controlling and regulating system 32, and temperature sensor is connected on casing, and one end of temperature sensor extend into box house, and the other end is connected with temperature controlling and regulating system.
During operation, first, the sample coupling shaft that will carry out tension test fixes and is placed in the main body sample chamber of box house, by filled with liquid nitrogen in liquid nitrogen container, by conduit and catheter interface, liquid nitrogen is sent in box body device, casing is by internal layer, moderate soak layer and the outer main body sample chamber formed, and internal layer and outer field material are stainless steel, and moderate soak layer is polyurethane thermal insulation board.
Box cover is made up of two semicircle case lids, conveniently assemble and disassemble sample, and centre is provided with a hole and connects sample for installing coupling shaft, and cabinet base is provided with fixed connection shaft, for fixing sample.Between casing and case lid, adopt encapsulant to be incubated.The temperature range of needs can be kept well.
After liquid nitrogen stream enters casing, after inner liquid nitrogen pipe gasification, through gasification net, sample environment temperature is reduced, after gasification, near sample, homogeneous temperature is constant, temperature sensor can show actual temperature in casing, by regulating liquid nitrogen flow and Control experiment temperature system, making test temperature remain in the scope of needs, experiment can be started after temperature stabilization.
Handle is fixed on casing, facilitates device to move.Tapping valve discharges raffinate after being used for test.
The present invention utilizes liquid nitrogen to carry out temperature control, can accurately test in 0 DEG C ~ (-196 DEG C) scope by control temperature, simple to operation, and test result is accurate, and cost is low, safe and efficient.
Claims (7)
1. the device for the test of metal material cryogenic tensile, it is characterized in that: this device comprises box body device (1), the temperature-controlling system (3) for the liquid nitrogen plan system (2) that cools and Control experiment temperature of placing sample, described box body device (1) comprises casing (11) and is arranged on the case lid (12) of casing (11) upper end, described casing (11) comprises internal layer (111) and outer (113), and is arranged on internal layer (111) heat-insulation layer (112) middle with outer (113); The fixed connection shaft (15) for installing sample additional is provided with at case lid (12) and casing (11) bottom; Liquid nitrogen plan system (2) comprises liquid nitrogen container (21), liquid nitrogen conduit (22), inner liquid nitrogen pipe (23), gasification net (24) and tapping valve (25), described liquid nitrogen container (21) is connected with inner liquid nitrogen pipe (23) by liquid nitrogen conduit (22), inner liquid nitrogen pipe (23) and gasification net (24) are arranged in casing (11), and fixed connection shaft (15) is positioned at gasification net (24) inner side, tapping valve (25) is arranged on casing (11) bottom; Described temperature-controlling system (3) comprises temperature sensor (31) and temperature controlling and regulating system (32), temperature sensor (31) is connected on casing (11), and one end of temperature sensor (31) extend into casing (11) inside, the other end is connected with temperature controlling and regulating system (32).
2. the device for the test of metal material cryogenic tensile according to claim 1, is characterized in that: heat-insulation layer (112) is polyurethane thermal insulation board.
3. the device for the test of metal material cryogenic tensile according to claim 1, is characterized in that: internal layer (111) and outer (113) are made by stainless steel.
4. the device for the test of metal material cryogenic tensile according to claim 1, is characterized in that: be provided with handle (14) in casing (11) both sides, top.
5. the device for the test of metal material cryogenic tensile according to claim 1, is characterized in that: between casing (11) and case lid (12), be provided with the encapsulant for insulation.
6. the device for the test of metal material cryogenic tensile according to claim 1, it is characterized in that: described casing (11) is right cylinder, case lid (12) is made up of two semicircle lids, and fixed connection shaft (15) is arranged on the centre position of case lid (12) and casing (11) bottom.
7. the device for the test of metal material cryogenic tensile according to claim 1, it is characterized in that: on casing (11), be provided with catheter interface (13), liquid nitrogen conduit (22) is connected with inner liquid nitrogen pipe (23) by catheter interface (13).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310288579.1A CN103344487B (en) | 2013-07-10 | 2013-07-10 | Device for low-temperature stretching test of metal material |
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| CN201310288579.1A CN103344487B (en) | 2013-07-10 | 2013-07-10 | Device for low-temperature stretching test of metal material |
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| CN103344487A CN103344487A (en) | 2013-10-09 |
| CN103344487B true CN103344487B (en) | 2015-05-27 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103674681A (en) * | 2013-12-12 | 2014-03-26 | 中国建筑股份有限公司 | Steel strand mechanical testing device in ultra-low-temperature environment and testing method thereof |
| CN107421803B (en) * | 2017-06-14 | 2020-09-08 | 合肥工业大学 | Aluminum alloy compression deformation device with controllable temperature and strain rate and testing method |
| CN113155592B (en) * | 2021-04-08 | 2022-04-29 | 哈尔滨工业大学（威海） | Metal material low temperature tensile test device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101598648A (en) * | 2009-05-15 | 2009-12-09 | 重庆理工大学 | Double space material cold-heat simulation experiment device |
| CN101706395A (en) * | 2009-11-18 | 2010-05-12 | 南京工业大学 | Device for measuring hydrogen embritllement sensitivity of materials in low-temperature environment |
| CN102331374A (en) * | 2011-06-09 | 2012-01-25 | 振石集团东方特钢股份有限公司 | Low-temperature tensile test device for metal material |
| CN102645369A (en) * | 2012-04-27 | 2012-08-22 | 深圳市建筑科学研究院有限公司 | Low-temperature tensile test device |
| CN203396634U (en) * | 2013-07-10 | 2014-01-15 | 南京钢铁股份有限公司 | Device for low-temperature tensile test of metal material |
-
2013
- 2013-07-10 CN CN201310288579.1A patent/CN103344487B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101598648A (en) * | 2009-05-15 | 2009-12-09 | 重庆理工大学 | Double space material cold-heat simulation experiment device |
| CN101706395A (en) * | 2009-11-18 | 2010-05-12 | 南京工业大学 | Device for measuring hydrogen embritllement sensitivity of materials in low-temperature environment |
| CN102331374A (en) * | 2011-06-09 | 2012-01-25 | 振石集团东方特钢股份有限公司 | Low-temperature tensile test device for metal material |
| CN102645369A (en) * | 2012-04-27 | 2012-08-22 | 深圳市建筑科学研究院有限公司 | Low-temperature tensile test device |
| CN203396634U (en) * | 2013-07-10 | 2014-01-15 | 南京钢铁股份有限公司 | Device for low-temperature tensile test of metal material |
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