CN105699169A - Quick heating device for high-temperature SHPB dynamic impact experiment - Google Patents

Abstract

The invention discloses a rapid heating device for high-temperature SHPB dynamic impact experiments, including an upper box, a lower box, a temperature sensor, a heating channel, a guide rail, an electrothermal conversion device, a hinge, an electric wire, a temperature measuring hole, a heating tile, Insulation cotton, outer wall, handle, ring, fasteners, and insulation board are connected together with a temperature sensor and a temperature control device to adjust the temperature inside the heating device in real time, and display the temperature through the temperature control device to achieve precise heating control The effect of temperature, and through the setting of the insulation board, the temperature is not easy to dissipate, which can make the temperature inside and outside the test piece consistent, and avoid the uneven temperature of the test piece. It can not only heat the test piece separately, but also quickly install and heat the test piece, so that the test piece can also be heated and impacted at the same position, the test piece is positioned accurately, the structure is simple and compact, easy to operate, high work efficiency, and low cost. The investment is small, the utility model is economical and convenient for popularization and promotion.

Description

A rapid heating device for high temperature SHPB dynamic impact experiment

technical field

The invention relates to the field of SHPB experimental auxiliary devices, in particular to a rapid heating device for high-temperature SHPB dynamic impact experiments.

Background technique

SHPB dynamic experiments are widely used in the study of material properties, but most of them are material experiments at room temperature, but high-temperature conditions also exist, so research on material properties at high temperatures is also required. At present, the SHPB high-temperature experiment method can be roughly divided into two types: one is to put the test piece and part of the probe into the temperature box and heat it at the same time. Xia Kaiwen et al., Experimental Mechanics, 1998, Vol.13, No. 3, PP.307-313) used a constant temperature heating furnace, and used the one-dimensional stress wave propagation theory and heat transfer principle to correct the influence of the temperature gradient field on the waveform measurement. The difficulty lies in the complexity of experimental data processing. The invention patent titled "Rapid Heating Device for High-Temperature Hopkinson Compression Bar Experiment" describes a rapid heating method for specimens. Due to the temperature rise effect, ceramic rods with the same outer diameter are designed on the incident rod and the transmission rod, ignoring the difference in the propagation of stress waves in different media, and also ignoring the error caused by the incident rod not directly impacting the test piece, which affects the accuracy of the experimental data. The other is to heat the specimen separately first, and quickly install the specimen in the system before the experiment. The article titled "Automatic Assembly Technology for SHPB System High Temperature Experiment" (Zhang Fangju et al., Experimental Mechanics, 2005, Vol.20, No. 2 period, PP.281-284) and the invention patent (Patent No.: ZL200610021096.5) titled "Automatic assembly device for two-way double-gas path for high-temperature Hopkinson pressure bar experiment" describes a two-way double-gas path for Hopkinson experiment The defect is that it is difficult to realize the quasi-static docking and synchronization of the system, which requires a very high-precision experimental device.

Contents of the invention

For above-mentioned situation, the object of the present invention is to provide a kind of fast heating device that is used for high-temperature SHPB dynamic shock experiment, and it can heat test piece separately, can install, heat test piece again rapidly, makes test piece can also make heating and The impact is carried out at the same position, the positioning of the test piece is accurate, the structure is simple and compact, the operation is easy, the work efficiency is high, the capital investment is small, it is economical and easy to popularize.

The technical solution adopted by the present invention to solve its technical problems is:

A rapid heating device for high-temperature SHPB dynamic impact experiments, including an upper box (1), a lower box (2), a temperature sensor (3), a heating channel (4), a guide rail (5), an electrothermal conversion device ( 6), hinge (7), wire (8), temperature measuring hole (9), heating tile (10), insulation cotton (11), outer wall (12), handle (13), ring (14), tight Firmware (15), heat preservation board (16), described upper box body (1) and lower box body are connected by hinge (7), described upper box body (1) and lower box body (2) are engraved with two a semicircle and can be combined into a full circle heating channel (4), the upper box (1) is connected with a temperature sensor (3), and the lower box (2) is connected with a guide rail (5) , the upper box (1) and the lower box (2) are provided with an electrothermal conversion device (6), the electrothermal conversion device (6) is connected with an electric wire (8), and the lower box (2) is Fasteners (15) are provided, thermal insulation cotton (11) is filled between the heating tile (10) and the outer wall (12), and a handle (13) is also provided on the upper box body (1).

In order to improve the comprehensive performance of the present invention, realize structure, effect optimization, its further measure is:

The diameter of heating channel (4) is the same as the external diameter of 100mm and circular ring (14), and the inner diameter of circular ring (14) is divided into two kinds of 75mm and 50mm, and circular ring (14) is made of two identical semicircles ring composition.

The heating tile (10) and the ring (14) are all high-temperature-resistant and heat-conducting ceramic materials, and a thermistor is laid below the heating tile (10), and is connected to the electrothermal conversion device (6).

The diameter of insulation board (16) is the same as the diameter of heating channel (4), and one deck insulation cotton is wrapped above insulation board (16).

The thickness of the thermal insulation cotton (11) filled between the outer wall (12) and the heating tile (10) is 3-5mm.

Compared with prior art, the advantage of the present invention is:

(1) In the present invention, the temperature sensor (3) is connected with the temperature control device to adjust the temperature inside the heating device in real time, and display the temperature through the temperature control device to achieve the effect of precisely controlling the heating temperature.

(2) The present invention utilizes the guide rail (5) to connect with the workbench of the SHPB test, which can slide freely on the workbench, so that it is convenient to take and place the test piece in the heating device, and avoids that taking and putting the test piece is easy to interfere with the SHPB incident rod And transmission rod, easy to operate, making heating the specimen more convenient and rapid.

(3) The present invention, through the setting of the heat preservation board (16), buckles the heat preservation board (16) into the heating hole channel (4) during heating or heat preservation, so that the temperature is not easy to dissipate, so that the test piece can be more uniform in the heating device To achieve the required temperature, through heat preservation, the temperature inside and outside the test piece can be consistent, avoiding the uneven temperature of the test piece.

(4) The present invention not only can heat the cylinder test piece that diameter 100mm is 100mm, but also can heat the test piece that diameter 75mm and 50mm, make The specifications of the heating test piece are various, and the position of the test piece in the heating device can also be fixed, so that the dynamic impact test can be effectively completed.

Description of drawings

Fig. 1 is a kind of three-dimensional structure schematic diagram of the rapid heating device that is used for high-temperature SHPB dynamic shock experiment of the present invention;

Fig. 2 is a kind of structural representation after opening of the rapid heating device for high-temperature SHPB dynamic impact experiment of the present invention;

Fig. 3 is a kind of ring structure schematic diagram of the rapid heating device that is used for high-temperature SHPB dynamic impact experiment of the present invention;

Fig. 4 is a working principle diagram of a rapid heating device for high-temperature SHPB dynamic impact experiments of the present invention;

Fig. 5 is the schematic diagram of a kind of fast heating device that is used for high-temperature SHPB dynamic impact experiment of the present invention in SHPB test system normal working state;

Labels in the schematic diagram: 1. Upper box; 2. Lower box; 3. Temperature sensor; 4. Heating channel; 5. Guide rail; 6. Electrothermal conversion device; 7. Hinge; 8. Wire; 9. Temperature measuring hole; 10. Heating tile; 11. Thermal insulation cotton; 12. Outer wall; 13. Handle; 14. Ring; 15. Fastener; 16. Thermal insulation board.

detailed description

In order to make the object, technical scheme and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with accompanying drawing:

A rapid heating device for high-temperature SHPB dynamic impact experiments, including an upper box (1), a lower box (2), a temperature sensor (3), a heating channel (4), a guide rail (5), an electrothermal conversion device ( 6), hinge (7), wire (8), temperature measuring hole (9), heating tile (10), insulation cotton (11), outer wall (12), handle (13), ring (14), tight Firmware (15), heat preservation board (16), described upper box body (1) and lower box body are connected by hinge (7), described upper box body (1) and lower box body (2) are engraved with two a semicircle and can be combined into a full circle heating channel (4), the upper box (1) is connected with a temperature sensor (3), and the lower box (2) is connected with a guide rail (5) , the upper box (1) and the lower box (2) are provided with an electrothermal conversion device (6), the electrothermal conversion device (6) is connected with an electric wire (8), and the lower box (2) is Fasteners (15) are provided, thermal insulation cotton (11) is filled between the heating tile (10) and the outer wall (12), and a handle (13) is also provided on the upper box body (1).

In this embodiment, a kind of fast heating device that is used for high-temperature SHPB dynamic shock experiment of design, puts test piece on the ring (14) when using, and puts together on the heating channel (4) again, by raising Close the upper box (1) with hand (13), fasten the fastener (15), fasten the insulation board (16), then connect the wire (8) to the temperature control device, connect the power supply, and adjust the temperature through the temperature control device. the required temperature, and then heat the test piece. When the temperature reaches the required temperature, the temperature sensor (3) will feed back the temperature information to the temperature control device, and then the temperature control device will enter the automatic heat preservation state. After several hours, the inside and outside of the test piece After reaching the control temperature, the test was carried out. During the test, the insulation board (16) was removed, so that both the incident rod and the transmission rod of the SHPB were aligned with the test piece, and then the dynamic impact test was carried out.

In this embodiment, through the setting of the insulation board (16), the insulation board (16) is buckled into the heating channel (4) during heating or heat preservation, so that the temperature is not easy to dissipate, so that the test piece can be more uniform in the heating device. To achieve the required temperature, through heat preservation, the temperature inside and outside the test piece can be consistent, avoiding the uneven temperature of the test piece.

In this embodiment, through the setting of the heating channel (16) with a diameter of 100mm and two identical semicircular rings, not only the cylindrical specimen with a diameter of 100mm can be heated, but also the specimens with a diameter of 75mm and 50mm can be heated, so that the heating The specifications of the test piece are various, and the position of the test piece in the heating device can also be fixed, so that the dynamic impact test can be effectively completed.

It should be pointed out that the above embodiments are only a part of the present invention, and the data and charts used in the examples are only used to illustrate the specific idea of the method. For those skilled in the art, all easily conceivable changes or equivalent replacements, improvements, etc. within the spirit and principles of the present invention shall be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (5)

1. A rapid heating device for high-temperature SHPB dynamic impact experiments, including an upper box (1), a lower box (2), a temperature sensor (3), a heating channel (4), a guide rail (5), an electrothermal conversion Device (6), hinge (7), wire (8), temperature measuring hole (9), heating tile (10), thermal insulation cotton (11), outer wall (12), handle (13), ring (14) , fasteners (15), insulation board (16), the upper box (1) and the lower box are connected by hinges (7), and the upper box (1) and the lower box (2) are engraved There are two semicircular heating passages (4) that can be combined into a full circle. The upper box (1) is connected with a temperature sensor (3), and the lower box (2) is connected with a guide rail ( 5), the upper box (1) and the lower box (2) are provided with an electrothermal conversion device (6), the electrothermal conversion device (6) is connected with an electric wire (8), and the lower box (2) ) is provided with a fastener (15), between the heating tile (10) and the outer wall (12) is filled with thermal insulation cotton (11), and a handle (13) is also provided on the upper box (1). 2. a kind of fast heating device that is used for high temperature SHPB dynamic impact experiment according to claim 1, it is characterized in that: the diameter of described heating channel (4) is the same as the outer diameter of 100mm and ring (14), circle The inner diameter of ring (14) is divided into two kinds of 75mm and 50mm, and annulus (14) is made of two identical semicircular rings. 3. A kind of rapid heating device for high-temperature SHPB dynamic impact experiment according to claim 1, it is characterized in that: described heating tile (10) and ring (14) are all high-temperature-resistant heat-conducting ceramic materials, and heating tile (10) A thermistor is laid below and connected to the electrothermal conversion device (6). 4. a kind of fast heating device that is used for high-temperature SHPB dynamic impact experiment according to claim 1 is characterized in that: the diameter of described insulation board (16) is the same as the diameter of heating channel (4), and insulation board ( 16) Wrap a layer of thermal insulation cotton on it. 5. A kind of rapid heating device for high-temperature SHPB dynamic impact test according to claim 1, characterized in that: the thickness of the thermal insulation cotton (11) filled between the outer wall (12) and the heating tile (10) It is 3~5mm.