CN210401088U - Tensile test device and heating device - Google Patents
Tensile test device and heating device Download PDFInfo
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- CN210401088U CN210401088U CN201921243364.7U CN201921243364U CN210401088U CN 210401088 U CN210401088 U CN 210401088U CN 201921243364 U CN201921243364 U CN 201921243364U CN 210401088 U CN210401088 U CN 210401088U
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Abstract
The utility model relates to a tensile test device and heating device, tensile test device includes heating device and tensile test machine, tensile test machine is including relative and the loading head of back of the body removal, heating device includes the heating furnace support and follows the fore-and-aft direction removal and assemble the heating furnace on the heating furnace support, it perforates with the test piece of furnace wall down to be provided with two at least last stoves that run through the heating furnace along upper and lower direction on the heating furnace, each test piece is perforated along fore-and-aft direction interval arrangement, be provided with on the heating furnace and perforate corresponding being used for carrying out removable fixed fixing device to the tensile test piece that the test piece was perforated. The utility model provides a need separate with heating device and lead to losing temperature among the prior art when tensile test piece tensile test, and can heat tensile test piece more than two simultaneously.
Description
Technical Field
The utility model relates to a tensile test device that is arranged in high temperature environment to carry out tensile test to tensile test piece.
Background
In recent years, with the development trend of high-rise, large-span, light-weight and durable civil engineering fields, steel fiber concrete, ultra-high performance concrete and other steel fiber-containing concrete materials are more and more widely applied in the fields of high-rise buildings, complex structures, large-span bridges, special use conditions and harsh environments (such as offshore platforms, submarine tunnels, nuclear facilities and military protection engineering), new requirements on the high-temperature fire resistance of the steel fiber concrete, ultra-high performance concrete and other materials are also provided, and the research on the fire resistance of the steel fiber concrete, ultra-high performance concrete and other materials is a hotspot.
The deterioration of the mechanical properties of the steel fiber concrete, the ultra-high performance concrete and the like at high temperature comprises two parts of the deterioration of the mechanical properties of the steel fiber and the deterioration of the mechanical properties of the concrete. In the prior art, when a tensile test is performed on the mechanical property of the steel fiber, a similar high-temperature medium steel fiber tensile property test mode is adopted, namely after the steel fiber in a temperature raising device reaches a target value, a high-temperature clamp is immediately used for putting the steel fiber in a high-temperature state on a tensile testing machine for loading, but in the process that a steel fiber tensile test piece moves to the tensile testing machine, the temperature of the tensile test piece changes, and a test result shows that the obtained steel fiber tensile test result in a high temperature medium is greatly different from the actual tensile property of the steel fiber in a high temperature medium of a fire hazard. In addition, when a plurality of groups of test data are needed, a plurality of tensile test pieces need to be heated respectively, on one hand, energy is wasted, and the temperature consistency of each tensile test piece is not easy to be ensured.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a heating device to solve the problem that the tensile test piece needs to be separated from the heating device to cause temperature loss during the tensile test in the prior art, and more than two tensile test pieces can be heated simultaneously; an object of the utility model is also to provide an use this heating device's tensile test device.
For solving the technical problem, the utility model discloses well tensile test device's technical scheme as follows:
the utility model provides a tensile test device, including heating device and tensile test machine, tensile test machine is including the loading head that can move relatively and back on the back mutually, heating device includes the heating furnace support and follows the fore-and-aft direction guide and remove the heating furnace of assembling on the heating furnace support, be provided with two at least test piece perforation that run through the last oven and the lower oven wall of heating furnace along the upper and lower direction on the heating furnace, each test piece perforation is followed fore-and-aft direction interval arrangement, be provided with on the heating furnace and perforate corresponding being used for carrying out removable fixed fixing device to the tensile test piece in the test piece perforation with the.
The fixing device is arranged on the upper furnace wall and/or the lower furnace wall of the heating wheel.
The heating furnace bracket is provided with scale marks extending along the front-back direction.
The tensile test device further comprises a large deformation extensometer, the large deformation extensometer comprises an upper measuring arm and a lower measuring arm which are arranged in parallel up and down and can move relatively and move back to back, and the upper measuring arm and the lower measuring arm are respectively used for being connected with the concrete heat insulation layers on the upper side and the lower side of the heating furnace.
The technical proposal of the middle heating device of the utility model is that:
the utility model provides a tensile test device's heating device, includes the heating furnace support and follows the fore-and-aft direction and remove the heating furnace of assembling on the heating furnace support, is provided with two at least test pieces that run through the last oven of heating furnace and furnace wall down along upper and lower direction on the heating furnace and perforates, and each test piece is perforated and is arranged along fore-and-aft direction interval, is provided with on the heating furnace and perforates corresponding being used for carrying out removable fixed fixing device to the tensile test piece among the test piece perforation with the test piece.
The fixing device is arranged on the upper furnace wall and/or the lower furnace wall of the heating wheel.
The heating furnace bracket is provided with scale marks extending along the front-back direction.
The utility model has the advantages that: during the test, at least two tensile test pieces to be stretched are respectively penetrated in corresponding test piece penetrating holes, the upper end and the lower end of each tensile test piece penetrate out of the upper side of the upper furnace wall and the lower side of the lower furnace wall respectively, the tensile test pieces are temporarily fixed through the fixing devices, then the tensile test pieces are simultaneously heated through the heating furnace, the temperature heating consistency of the tensile test pieces is ensured, after reheating is completed, one tensile test piece is subjected to the tensile test through the tensile testing machine, the corresponding fixing devices are required to be loosened during the tensile test, the tensile test pieces are not required to be moved away by the heating devices, the tensile test pieces can be ensured not to lose temperature, after the tensile test of one tensile test piece is completed, other tensile test pieces can be moved to the positions corresponding to the loading heads through the movable heating furnace, the tensile test is further performed, and a plurality of.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of a middle tensile test apparatus according to the present invention.
Detailed Description
An example of a tensile testing apparatus is shown in FIG. 1: comprises a heating device, a tensile testing machine, a tensile test piece 17 and a large deformation extensometer 7. The tensile testing machine is a conventional reinforcing steel bar tensile testing machine and comprises a base 14, four upright posts 2 are arranged on the base, a beam 1 capable of moving up and down is assembled on the upright posts 2 in a guiding and moving mode, loading heads used for being connected with reinforcing steel bars are respectively arranged on the beam and the base 1, the loading head on the beam is called an upper loading head 3 in the embodiment, the loading head on the base is called a lower loading head 13, the lower loading head is driven by a loading mechanism, the loading mechanism in the embodiment is a loading cylinder which is vertically arranged, and the upper loading head and the lower loading head belong to the prior art and are not described in detail herein.
The heating device comprises a heating furnace support 12 and a heating furnace 5 internally provided with a resistance heating wire, wherein the bottom of the heating furnace is provided with walking wheels 10 which are guided and move along the front-back direction to be matched with the heating furnace support, and the heating furnace support is provided with scale marks 21 which are arranged along the front-back direction. The heating furnace comprises an upper furnace wall 16, a lower furnace wall 20 and a peripheral furnace wall 18 arranged between the upper furnace wall 16 and the lower furnace wall 20, and the whole heating furnace is of a cuboid box-shaped structure with the length extending along the front-back direction. The upper furnace wall and the lower furnace wall of the heating furnace are provided with test piece through holes 24 which are correspondingly arranged up and down, in the embodiment, ten test piece through holes are formed, and the test piece through holes 24 are arranged at intervals along the front-back direction. The bottom of the heating furnace is provided with fixing devices 19 corresponding to the test piece perforation holes on the lower sides respectively, the fixing devices are used for temporarily fixing the tensile test piece 17 and comprise clamping parts capable of clamping and loosening the tensile test piece, the fixing devices comprise annular fixed seats 22 which are fixed on the bottom of the lower furnace wall and are coaxially arranged with the corresponding test piece perforation holes, and the clamping parts are formed by jacking screws 23 which are connected to the annular fixed seats along the radial direction through threads.
The tensile test piece in this embodiment is steel fiber tensile test piece, tensile test piece includes vertical arrangement's test piece body, the test piece body includes steel fiber test piece 8 and welded fastening in the steel fiber test piece both ends connecting reinforcement 15 at middle part, connecting reinforcement 15 of upside is used for being connected with last loading head, the connecting reinforcement of downside is used for being connected with lower loading head, all pour on the test piece body in the periphery between steel fiber test piece and each connecting reinforcement and be fixed with the concrete insulating layer, the concrete insulating layer that the position leaned on is called concrete insulating layer 4, the concrete insulating layer that the position leaned on is called concrete insulating layer 9 down, steel fiber test piece between upper and lower concrete insulating layer forms the section of rising temperature, the concrete insulating layer can realize on the one hand thermal-insulated, also can form the protection to steel fiber test piece and connecting reinforcement's junction in addition, avoid the corrosion. The large-deformation extensometer comprises an upper measuring arm 6 and a lower measuring arm 11 which are arranged side by side up and down and can move relatively and move back to back, wherein the upper measuring arm 6 and the lower measuring arm 11 are respectively connected with concrete heat-insulating layers on the upper side and the lower side of a heating furnace, a horizontal jack is specifically arranged on the concrete heat-insulating layers, and the upper measuring arm and the lower measuring arm can be directly inserted into the corresponding horizontal jack to be connected with the concrete heat-insulating layers.
When the device is used, each tensile test piece is respectively arranged in the corresponding test piece through hole in a penetrating mode, the concrete heat insulation layer at the upper position corresponds to the test piece through hole at the upper position, and the concrete heat insulation layer at the lower position corresponds to the test piece through hole at the lower position. Connecting steel bars at two ends of the test piece body are respectively positioned on the upper side and the lower side of the heating furnace, and the screwing jacking screws are screwed to prop against the concrete heat insulation layer on the lower side of the corresponding tensile test piece, so that the temporary fixation of each tensile test piece is realized. And then heating the temperature rise sections of the tensile test pieces by the heating furnace, and simultaneously heating the tensile test pieces, so that on one hand, energy can be saved, and in addition, the consistency of the test temperature of the tensile test pieces can be ensured, the temperature rise sections of the tensile test pieces are kept consistent with the temperature of a furnace chamber of the heating furnace, in the heating process of the tensile test pieces, only the temperature rise sections are basically heated, the test piece bodies on the upper side and the lower side of the temperature rise sections are wrapped by the concrete heat insulation layer and are not heated, and the normal temperature state is kept. The upper loading head descends, the lower loading head ascends to be connected with two ends of one tensile test piece, the upper measuring arm and the lower measuring arm of the large deformation extensometer are respectively connected with corresponding concrete heat insulation layers, the corresponding fixing device is loosened, then the loading mechanism applies tension to the test piece body through the lower loading head, the deformation extensometer measures the whole loading deformation of the tensile test piece as L, the loading deformation of a temperature rise section is L1= L-F L/k, in the formula, F represents the loading force of the loading head of the tensile testing machine to the tensile test piece, k represents the elastic coefficient of a steel bar at normal temperature, L = the total length of the test piece body minus the length of the temperature rise section before non-stretching, the deformation of the temperature rise section can be accurately obtained, after the tensile test piece is stretched, the heating furnace moves forwards and backwards, the tensile tests of other tensile test pieces can be completed, and multiple groups of test data can be obtained, the heating furnace keeps the temperature of the furnace chamber unchanged during the test. The utility model discloses a tensile test piece also can not be steel fibre tensile test piece in other embodiments, for example tensile test piece be reinforcing bar tensile test piece, and the test piece body at this moment can be the reinforcing bar of an organic whole setting.
The concrete tensile test method comprises the following steps that firstly, at least two tensile test pieces are respectively arranged in corresponding test piece through holes on a heating furnace of a heating device in a penetrating manner, connecting steel bars at two ends of the tensile test pieces are respectively positioned at the upper side and the lower side of the heating furnace, concrete heat insulation layers of the tensile test pieces respectively correspond to the test piece through holes at the upper side and the lower side, and clamping parts of a fixing device clamp and temporarily fix the corresponding tensile test pieces; secondly, heating the temperature rise sections of the tensile test pieces through a heating furnace; thirdly, connecting a loading head of a tensile testing machine to a connecting section of one tensile test piece, loosening a fixing device corresponding to the tensile test piece, connecting an upper measuring arm and a lower measuring arm of a large deformation extensometer to concrete heat insulation layers on the upper side and the lower side, carrying out tensile loading on the tensile test piece through the tensile testing machine, measuring a loading deformation L of the tensile test piece through the large deformation extensometer, and obtaining a deformation of a temperature rise section through a formula L-F L/k, wherein F represents the loading force of the loading head of the tensile testing machine to the tensile test piece, k represents the elastic coefficient of a steel bar at normal temperature, and L = subtracting the length of the temperature rise section before non-stretching from the total length of a test piece body; and fourthly, loosening the connection between the loading head and the tensile test piece, moving the heating furnace back and forth, moving the connecting steel bars of other tensile test pieces to positions corresponding to the loading head, repeating the third step, and sequentially finishing the tensile test of each tensile test piece.
Claims (7)
1. The utility model provides a tensile test device, includes heating device and tensile test machine, tensile test machine includes loading head that can be relative and carry out opposite directions removal, its characterized in that: the heating device comprises a heating furnace support and a heating furnace assembled on the heating furnace support in a guiding and moving mode along the front-back direction, at least two test piece perforations which penetrate through the upper furnace wall and the lower furnace wall of the heating furnace along the up-down direction are arranged on the heating furnace, each test piece perforation is arranged at intervals along the front-back direction, and a fixing device which corresponds to the test piece perforation and is used for conducting detachable fixing on a tensile test piece in the test piece perforation is arranged on the heating furnace.
2. The tensile testing apparatus of claim 1, wherein: the fixing device is arranged on the upper furnace wall and/or the lower furnace wall of the heating wheel.
3. The tensile testing apparatus of claim 1, wherein: the heating furnace bracket is provided with scale marks extending along the front-back direction.
4. The tensile test apparatus according to any one of claims 1 to 3, wherein: the tensile test device further comprises a large deformation extensometer, the large deformation extensometer comprises an upper measuring arm and a lower measuring arm which are arranged in parallel up and down and can move relatively and move back to back, and the upper measuring arm and the lower measuring arm are respectively used for being connected with the concrete heat insulation layers on the upper side and the lower side of the heating furnace.
5. A heating device of a tensile test device is characterized in that: the device comprises a heating furnace support and a heating furnace assembled on the heating furnace support in a guiding and moving mode along the front-back direction, at least two test piece perforation holes penetrating through an upper furnace wall and a lower furnace wall of the heating furnace along the up-down direction are formed in the heating furnace, each test piece perforation hole is arranged at intervals along the front-back direction, and a fixing device which corresponds to the test piece perforation hole and is used for detachably fixing a tensile test piece in the test piece perforation hole is arranged on the heating furnace.
6. The heating device according to claim 5, wherein: the fixing device is arranged on the upper furnace wall and/or the lower furnace wall of the heating wheel.
7. The heating device according to claim 5 or 6, characterized in that: the heating furnace bracket is provided with scale marks extending along the front-back direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921243364.7U CN210401088U (en) | 2019-08-02 | 2019-08-02 | Tensile test device and heating device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921243364.7U CN210401088U (en) | 2019-08-02 | 2019-08-02 | Tensile test device and heating device |
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| CN210401088U true CN210401088U (en) | 2020-04-24 |
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| CN201921243364.7U Active CN210401088U (en) | 2019-08-02 | 2019-08-02 | Tensile test device and heating device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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2019
- 2019-08-02 CN CN201921243364.7U patent/CN210401088U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110320110A (en) * | 2019-08-02 | 2019-10-11 | 河南工程学院 | A kind of tensile test apparatus and heating device |
| CN110320110B (en) * | 2019-08-02 | 2022-02-08 | 河南工程学院 | Tensile test device and heating device |
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