CN210533859U - Auxiliary loading device for split Hopkinson pressure bar test sample - Google Patents
Auxiliary loading device for split Hopkinson pressure bar test sample Download PDFInfo
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- CN210533859U CN210533859U CN201921279973.8U CN201921279973U CN210533859U CN 210533859 U CN210533859 U CN 210533859U CN 201921279973 U CN201921279973 U CN 201921279973U CN 210533859 U CN210533859 U CN 210533859U
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Abstract
The utility model discloses an auxiliary loading device of disconnect-type hopkinson pressure bar test sample, including explosion-proof box and sample loading attachment, sample loading attachment comprises two belt pole rings that the size equals, the horizontal pole, clamping device, the pole portion of belt pole ring is helicitic texture, the same axial of horizontal pole is provided with a plurality of screw hole, the pole portion of belt pole ring passes through screw hole after to be fixed on the horizontal pole perpendicularly through clamping device, the horizontal pole level hangs the central point of roof on the explosion-proof box and puts, through adjusting the fixed position of belt pole ring and horizontal pole and the ring diameter of belt pole ring, can load multiple size sample, prevent effectively that the sample that causes because of material dead weight or impact disturbance from falling or moving down; the added explosion-proof box is convenient for sample loading and fragment cleaning and also increases the safety of an impact test. The utility model discloses simple structure can realize the accurate positioning of different test pieces, and its structure is convenient for install and dismantles, and easy operation is convenient simultaneously.
Description
Technical Field
The utility model relates to a geotechnical engineering field, concretely relates to auxiliary loading device of disconnect-type hopkinson pressure bar test sample.
Background
The split Hopkinson bar test technology (SHPB) is the most important and reliable test method for researching the dynamic mechanical properties of materials at high strain rates, and is also an important component of explosion and impact dynamics test technology. With the continuous development of scientific research and novel material technology, the dynamic impact mechanical property test of the material is continuously concerned, and the separated Hopkinson pressure bar test is also rapidly developed. In the impact process, a sample needs to be placed between an incident rod and a transmission rod, the sample is kept standing by utilizing the friction force between the material and the alloy rod, and in the test, in order to enable the sample to be better coupled with the incident rod and the transmission rod, a coupling agent is coated on a contact surface, so that the friction force between the material and the alloy rod is greatly reduced; due to the dead weight of the material and the impact disturbance, the sample falls or moves downwards, so that the sample, the incident rod and the transmission rod are not coaxial, the impact wave signal of the material is difficult to measure or the measured signal is inaccurate, and the success rate of the test is reduced.
The diameter of a test piece which can be supported by the developed SHPB device is single, the length of the test piece is generally not more than 200mm, the adjustment range and the test range have certain limitations, and the test requirements and the precision of a rock test piece with multiple sizes and large length cannot be met.
In addition, in order to facilitate research and grasp of the rock destruction process, a high-definition camera is adopted to conduct whole-course recording in most test processes, but when the SHPB test rate reaches more than 10m/s, broken rock fragments of the high-definition camera in a short distance often fly out to cause lens damage or life safety of testers, and serious economic and instrument loss is caused. However, there are currently no well-known protection devices or the like that avoid and prevent rock fragments from flying out at high rates.
Disclosure of Invention
In order to overcome among the prior art because of the sample dead weight and the high density material that the impact disturbance arouses falls or moves down at the loading in-process, can't keep the sample, the pole of incidence and transmission pole are coaxial, lead to experimental test signal inaccuracy or experimental failure not enough, and the rock fragment of destruction causes the damaged or experimenter's of camera lens life safety, the utility model provides a supplementary loading device of disconnect-type hopkinson depression bar test sample, use the utility model discloses a sample supplementary loading device can effectively improve test signal's collection efficiency and experimental success rate, avoids the rock sample to the destruction and the damage that the high definition camera caused under the striking of pole high speed, prevents the cracked departure of rock sample and the secondary injury that causes experimenter and place. In order to achieve the above-mentioned test purpose, the utility model provides a technical scheme that its technical problem adopted does:
the utility model provides a supplementary loading device of experimental sample of disconnect-type hopkinson depression bar, including explosion-proof box, sample loading attachment sets up in explosion-proof box's inside, a serial communication port, sample loading attachment is by the belted pole ring that two sizes equal, the horizontal pole, clamping device constitutes, the material sample loads in the ring of two belted pole rings, the pole portion of belted pole ring is helicitic texture, the same axial of horizontal pole is provided with a plurality of screw hole, the pole portion of belted pole ring passes behind the screw hole and passes through clamping device vertical fixation on the horizontal pole, the horizontal pole level hangs the central point that roof put on explosion-proof box.
Further, the material of the sample loading device is alloy steel.
Furthermore, the cross rod is provided with at least two threaded holes, and the inner diameter of each threaded hole is equal to the diameter of the rod part of the circular ring with the rod.
Furthermore, the diameter of the ring with the rod ring is 10-100 mm.
Furthermore, the explosion-proof box is a cuboid, and the materials of the left top plate of the explosion-proof box, the upper top plate of the explosion-proof box, the front top plate of the explosion-proof box, the rear top plate of the explosion-proof box, the right top plate of the explosion-proof box and the lower top plate of the explosion-proof box are all transparent organic glass.
Furthermore, a left hole of the left top plate of the explosion-proof box is provided with an incident rod in a penetrating mode, a right hole of the right top plate of the explosion-proof box is provided with a transmission rod in a penetrating mode, and the left hole and the right hole are respectively arranged in the center positions of the left top plate of the explosion-proof box and the right top plate of the explosion-proof box.
Further, the material sample is horizontally and coaxially arranged with the transmission rod and the incidence rod.
Furthermore, the front top plate of the explosion-proof box is movably connected with the lower top plate of the explosion-proof box through at least one hinge, and a handle is arranged on the front top plate of the explosion-proof box.
The utility model has the advantages that: through using this utility model discloses split type hopkinson depression bar test system's sample auxiliary loading device can guarantee that the pole of inciting, transmission pole and sample three level are coaxial, can load multiple size sample, can effectively prevent because of the sample dead weight or the sample that the disturbance effect of strikeing arouses falls or the gliding, and the explosion-proof box can satisfy sample installation, fragment collection and clear up and effectively keep apart the effect of disintegrating the fragment. The auxiliary loading device is simple in design and convenient to operate, and can effectively improve the test efficiency.
Drawings
FIG. 1 is a schematic diagram of an auxiliary loading device for a split Hopkinson pressure bar test sample;
FIG. 2 is a schematic diagram of the assembled sample and sample loading device;
FIG. 3 is a schematic view of the structure of the sample loading device;
the test device comprises a transmission rod 1, an incidence rod 2, a sample loading device 3, a rod-containing ring 4, a cross rod 5, a clamping device 6, a threaded hole 7, a material sample 8, an explosion-proof box 9, an explosion-proof box left top plate 10, an explosion-proof box upper top plate 11, an explosion-proof box front top plate 12, an explosion-proof box rear top plate 13, an explosion-proof box right top plate 14, an explosion-proof box lower top plate 15, a left hole 16, a right hole 17, an 18-rear hole, a front hole 19, a hinge 20 and a handle 21.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Referring to fig. 1, fig. 2 and fig. 3, the utility model relates to a supplementary loading device of disconnect-type hopkinson pressure bar test sample, including explosion-proof case 9, sample loading attachment 3 sets up in explosion-proof case 9's inside, and sample loading attachment 3 comprises two belt rod rings 4 that the size equals, horizontal pole 5, clamping device 6, and material sample 8 loads in two belt rod rings 4's rings, and sample loading attachment 3's material is nickel chromium alloy steel material.
Preferably, the rod part of the circular ring with rod 4 is of a threaded structure, a plurality of threaded holes 7 are axially arranged on the cross rod 5, the rod part of the circular ring with rod 4 is vertically fixed on the cross rod 5 through the clamping device 6 after penetrating through the threaded holes 7, the inner diameter of each threaded hole 7 is equal to the diameter of the rod part of the circular ring with rod 4, and the cross rod 5 is horizontally suspended in the center of the top plate 11 on the explosion-proof box. In this embodiment, the cross rod 5 is provided with 2 threaded holes 7, the diameter of the ring with the rod ring 4 is 50mm, and the clamping device 6 is a nut.
Preferably, the explosion-proof box 9 is a cuboid of 25cm by 20cm, and the left top plate 10, the upper top plate 11, the front top plate 12, the rear top plate 13, the right top plate 14 and the lower top plate 15 of the explosion-proof box are made of transparent organic glass.
Preferably, an incident rod 2 is arranged in a left hole 16 penetrating through a left top plate 10 of the explosion-proof box, a transmission rod 1 is arranged in a right hole 17 penetrating through a right top plate 13 of the explosion-proof box, the left hole 16 and the right hole 17 are respectively arranged in the center positions of the left top plate 10 of the explosion-proof box and the right top plate 13 of the explosion-proof box, the diameter of the left hole 16 is larger than that of the incident rod 2, and the diameter of the right hole 17 is larger than that of the transmission rod 1, so that the transmission rod 1 and the incident rod 2 can move left and right.
Preferably, the transmission rod 1 and the incident rod 2 are horizontally and coaxially arranged with the material sample 8, and the material sample 8 is well butted with the transmission rod 1 and the incident rod 2 through the coupling agent.
Preferably, a front hole 19 and a rear hole 18 with the diameter of 30mm are designed in the center positions of the explosion-proof box front baffle plate 12 and the explosion-proof box rear baffle plate 13 so as to facilitate the penetration of a strain gauge and a high-speed camera.
Preferably, two hinges 20 are symmetrically arranged at the junction of the explosion-proof box front top plate 12 and the explosion-proof box lower top plate 13, a handle 21 is arranged on the other side of the explosion-proof box front top plate 12, the explosion-proof box front top plate 12 can be opened downwards through the handle 21, the assembly of the material sample 8 and the sample loading device 3 is facilitated, and meanwhile, the broken material sample 8 is convenient to clean.
It should be noted that, an auxiliary loading device for split hopkinson pressure bar test samples is provided with the belt rod rings 4 with different diameters, and samples of various sizes are loaded by selecting the belt rod rings 4 with different diameters and adjusting the fixed positions of the belt rod rings 4 and the cross rod 5. Aiming at a slender sample, 2 small-diameter rings 4 with rods are selected, 2 relatively far threaded holes 7 are selected, and the height of the rods of the rings 4 with rods penetrating through the threaded holes 7 is adjusted to enable the transmission rods 1, the incident rods 2 and the material sample 8 to be arranged horizontally and coaxially, so that the sample is prevented from falling or sliding downwards
An auxiliary loading process of the embodiment is that the front top plate 12 of the explosion-proof box is firstly opened through the handle 21, the ends of the incident rod 2 and the transmission rod 1 enter the explosion-proof box 9 and enough space is reserved for the material sample 8; then smearing coupling agents on two end surfaces of a material sample 8, placing the material sample 8 in the two rings of the two rings with the rods 4, adjusting the fixing positions of the rings with the rods 4 and the cross rod 5 to enable the material sample 8 to be horizontally coaxial with the transmission rod 1 and the incident rod 2, pushing the incident rod 2 and the transmission rod 1 to clamp the material sample 8, and closing a front top plate 12 of the explosion-proof box; pressurizing, and testing after all parameters are correct; after the test is finished, the sample fragments are collected after the front top plate 12 of the explosion-proof box is opened.
The embodiments described above are intended to facilitate one of ordinary skill in the art in understanding and using the present invention. It will be readily apparent to those skilled in the art that various modifications to the above-described embodiments may be made, and the generic principles defined herein may be applied to other embodiments without the use of inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications to the present invention according to the disclosure of the present invention within the protection scope of the present invention.
Claims (8)
1. The utility model provides a supplementary loading device of disconnect-type hopkinson depression bar test sample, including explosion-proof case (9), sample loading attachment (3) set up in the inside of explosion-proof case (9), a serial communication port, sample loading attachment (3) are by two belt pole rings (4) that the size equals, horizontal pole (5), clamping device (6) are constituteed, material sample (8) load in the ring of two belt pole rings (4), the pole portion of belt pole ring (4) is helicitic texture, the same axial of horizontal pole (5) is provided with a plurality of screw hole (7), the pole portion of belt pole ring (4) passes behind screw hole (7) and passes through clamping device (6) vertical fixation on horizontal pole (5), horizontal pole (5) level hangs the central point of roof (11) on explosion-proof case and puts.
2. The auxiliary loading device for the split Hopkinson pressure bar test specimen according to claim 1, wherein the material of the specimen loading device (3) is alloy steel.
3. The auxiliary loading device for the split Hopkinson pressure bar test specimen according to claim 1, wherein the cross bar (5) is provided with at least two threaded holes (7), and the inner diameter of each threaded hole (7) is equal to the diameter of the rod part of the circular ring with rod (4).
4. The auxiliary loading device for split hopkinson pressure bar test specimens as claimed in claim 1, wherein the diameter of the ring of the bar ring (4) is 10-100 mm.
5. The auxiliary loading device for the split Hopkinson pressure bar test sample according to claim 1, wherein the explosion-proof box (9) is a cuboid, and the materials of the left top plate (10), the upper top plate (11), the front top plate (12), the rear top plate (13), the right top plate (14) and the lower top plate (15) of the explosion-proof box are all transparent organic glass.
6. The auxiliary loading device for the split Hopkinson pressure bar test sample according to claim 5, wherein an incident rod (2) penetrates through a left hole (16) of a left top plate (10) of the explosion-proof box,
a transmission rod (1) penetrates through a right hole (17) of an explosion-proof box right top plate (14), and a left hole (16) and a right hole (17) are respectively formed in the center positions of an explosion-proof box left top plate (10) and an explosion-proof box right top plate (14).
7. The auxiliary loading device for the split Hopkinson pressure bar test specimen according to claim 6, wherein the material specimen (8) is horizontally and coaxially arranged with the transmission rod (1) and the incidence rod (2).
8. The auxiliary loading device for the split Hopkinson pressure bar test specimen according to claim 7, wherein the explosion-proof box front top plate (12) is movably connected with the explosion-proof box lower top plate (15) through at least one hinge (20), and the explosion-proof box front top plate (12) is provided with a handle (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921279973.8U CN210533859U (en) | 2019-08-08 | 2019-08-08 | Auxiliary loading device for split Hopkinson pressure bar test sample |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921279973.8U CN210533859U (en) | 2019-08-08 | 2019-08-08 | Auxiliary loading device for split Hopkinson pressure bar test sample |
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| CN210533859U true CN210533859U (en) | 2020-05-15 |
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| CN201921279973.8U Active CN210533859U (en) | 2019-08-08 | 2019-08-08 | Auxiliary loading device for split Hopkinson pressure bar test sample |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112304785A (en) * | 2020-10-26 | 2021-02-02 | 广东工业大学 | Hopkinson bar device for preventing test piece from falling off |
| CN112577813A (en) * | 2020-12-04 | 2021-03-30 | 西南交通大学 | Be used for disconnect-type hopkinson depression bar test piece positioner |
| WO2023193469A1 (en) * | 2022-11-30 | 2023-10-12 | 安徽理工大学 | Gas pressure maintaining split hopkinson pressure bar confining pressure device and usage method therefor |
-
2019
- 2019-08-08 CN CN201921279973.8U patent/CN210533859U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112304785A (en) * | 2020-10-26 | 2021-02-02 | 广东工业大学 | Hopkinson bar device for preventing test piece from falling off |
| CN112577813A (en) * | 2020-12-04 | 2021-03-30 | 西南交通大学 | Be used for disconnect-type hopkinson depression bar test piece positioner |
| CN112577813B (en) * | 2020-12-04 | 2022-04-12 | 西南交通大学 | Be used for disconnect-type hopkinson depression bar test piece positioner |
| WO2023193469A1 (en) * | 2022-11-30 | 2023-10-12 | 安徽理工大学 | Gas pressure maintaining split hopkinson pressure bar confining pressure device and usage method therefor |
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