CN203101223U - Impact test device for measuring flowing pressure of discrete material - Google Patents
Impact test device for measuring flowing pressure of discrete material Download PDFInfo
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- CN203101223U CN203101223U CN 201320071855 CN201320071855U CN203101223U CN 203101223 U CN203101223 U CN 203101223U CN 201320071855 CN201320071855 CN 201320071855 CN 201320071855 U CN201320071855 U CN 201320071855U CN 203101223 U CN203101223 U CN 203101223U
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- bearing plate
- anchor clamps
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- impact test
- pressure transducer
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Abstract
The utility model relates to an impact test device for measuring the flowing pressure of a discrete material. The impact test device comprises a test bed and a launching rack for launching a high-speed bullet, wherein the test bed is provided with a clamp, the lower half part of the clamp is symmetrically provided with two clamp through holes, the inner lower part of the clamp is provided with a lower bearing plate, the lower bearing plate is symmetrically provided with lower bearing plate through holes in the diameter direction, a pressure sensor is arranged between each lower bearing plate through hole and the test bed, each lower bearing plate through hole is internally provided with a pressure block, and the pressure block is inserted into the pressure sensor; and the inner upper part of the clamp is provided with an upper bearing plate, and a parallel light source and a speed measurer are arranged between the upper bearing plate and a launching hole. The impact test device not only can detect the integral stress and displacement variation situation of the discrete material system and the stress variation situation of one area on the bottom of the discrete material under the effect of an impact load; and moreover, the impact test device is simple in structure, low in cost, easy to operate and reusable.
Description
Technical field
The utility model relates to a kind of impact test apparatus of measuring the loose material flowing pressure, belongs to loose material flowing pressure experimental technique field.
Background technology
Because loose material has the important engineering meaning, has obtained domestic and international experts and scholars' extensive concern, and has carried out a large amount of research, mainly be divided into static and dynamic.Under quiescent conditions, the mechanical characteristic of loose material is similar to continuous material, and present research mostly concentrates on this aspect.It is complicated that current intelligence becomes because relating to impact load, can't carry out theoretical derivation, the method that can only adopt experimental study and numerical analysis to combine.The experimental study of loose material mainly contains two difficult points: the one, and the detection of shot particle contact force, the 2nd, how impact load is applied to loose material.
In shot particle contact force context of detection, contact detection method commonly used at present mainly comprises scales/electronic balance weighing method and transfer paper impression method.Aspect the impact loading, existing impact load test mainly contains drop-weight test, Hopkinson bar test and projectile test all at non-individual body.
The scales/electronic balance weighing method is to utilize probe contact bottom layer particle, determines the pressure of particle to bottom by the reading of electronic balance, and parallel traveling probe can obtain the pressure size of each particle of bottom to the bottom surface.Though the precision of electronic balance is greatly improved, by needing the mobile device position in the measuring process, the bottom particle can produce friction with surface of contact inevitably, thereby causes the redistribution of granule interior power, influences test findings.
The transfer paper indentation method is to spread colour developing sensitive transfer paper and blank sheet of paper between particle bottom and supporting surface respectively, under external force, the bottom particle is by extruding transfer paper, and the impression that formation varies in size and shade differs on blank sheet of paper can determine to contact deformation and normal force size by demarcating.But because the sensitivity of transfer paper is limited, hour is difficult in and stays clearly vestige on the blank sheet of paper when particle is stressed, therefore only be subjected under the situation of big external force effect at granular system, this method is energy measurement contact force.
In addition, the loose material system flow with destructive process in, utilize above-mentioned two kinds of methods, can't measure certain regional stress situation of change of granular system bottom.
Drop-weight test origin early, but because its low cost, advantage such as easy to operate are used till today, but the impact energy that this equipment produced is directly proportional with the volume that drops hammer, produce greater impact can the time, need dropping hammer of significant volume, make the test extremely complexity that becomes.The Hopkinson bar test is primarily aimed at test specimens such as rock, and the greater impact energy can be provided, and the feasibility of test is better.Starting late of projectile test mainly utilize the gas-powered of molecular level, but this experimentation cost is higher, and testing crew need possess certain theoretical foundation.
The utility model content
The utility model patent is in order to solve above-mentioned existing measuring method and to impact the technical matters that load mode exists, providing a kind of and can detect the stress of loose material system integral body under the impact load effect and the test unit of a certain regional stress situation of change of change in displacement situation and loose material bottom.
The utility model is that the technical scheme that solves the problems of the technologies described above proposition is: a kind of impact test apparatus of measuring the loose material flowing pressure, the launcher that comprises testing table and emission high velocity bullet, described launcher is arranged on the testing table, and described testing table is provided with the anchor clamps that a steel does not have end uncovered column barrel, described anchor clamps the first half inner diameter is greater than the latter half inner diameter, and be arranged with two anchor clamps through holes in anchor clamps the latter half, below, described anchor clamps inside is provided with the following bearing plate of steel cylinder, described bearing plate diametric(al) down is arranged with two columniform bearing plate through holes down, be provided with pressure transducer between described bearing plate through hole down and the testing table, the lead of described pressure transducer involves by the anchor clamps through hole, and in the described bearing plate through hole down the briquetting that the bearing plate through hole slides under the edge is set respectively, described briquetting passes down in the bearing plate through hole insertion pressure transducer simultaneously; Described anchor clamps inner and upper is provided with bearing plate, and the described transmitting aperture of going up bearing plate and launcher is oppositely arranged, and is provided with source of parallel light and velometer between simultaneously described last bearing plate and the transmitting aperture.
Preferably: described briquetting is made up of two steel cylinder up and down, and the first half cylinder diameter is slightly less than down the bearing plate through-hole diameter, and the latter half cylinder diameter is slightly less than pressure transducer slot diameter.
A kind of impact test apparatus of measuring the loose material flowing pressure of the present utility model, compared to existing technology, has following beneficial effect: during use, at first anchor clamps are placed on the testing table center, following bearing plate is fixed in the anchor clamps, and pressure transducer places down the bearing plate below over against the through hole of following bearing plate, the data line of pressure transducer is derived by the through hole of anchor clamps, is connected to the external data receiving equipment.Then briquetting the first half is put into down in the through hole of bearing plate, the latter half is inserted the pressure transducer slot.Pour loose material into anchor clamps, will go up bearing plate and be placed on the loose material reposefully.At last launcher is placed on the centre of testing table, settles source of parallel light and velometer, the emission high velocity bullet applies impact load to last bearing plate, the record pressure sensor data.After the off-test, bearing plate in the taking-up sieves the loose material after the fragmentation, to obtain the Size Distribution situation, therefore apparatus structure is simple, cost is low, and is easy to operate, and reusable, broken through the limitation of existing test unit, impact load is loaded on the loose material, and accurately measures loose material in mobile and destructive process, a certain regional stress situation of change of the stress of material monolithic and change in displacement situation and loose material bottom.
Description of drawings
Fig. 1 is the structural representation that the utility model is measured the impact test apparatus of loose material flowing pressure;
Fig. 2 is the enlarged diagram of anchor clamps among Fig. 1;
Fig. 3 goes up the bearing plate enlarged diagram among Fig. 1;
Fig. 4 is a following bearing plate enlarged diagram among Fig. 1;
Fig. 5 is to be the briquetting enlarged diagram among Fig. 1;
Wherein: 1 is testing table, and 2 is launcher, and 3 is anchor clamps, and 4 are following bearing plate, and 5 is last bearing plate, and 6 is briquetting, and 7 is pressure transducer, and 8 is through hole, and 9 is velometer, and 10 is source of parallel light, and 11 is high velocity bullet.
Embodiment
Accompanying drawing discloses the structural representation of a preferred embodiment of the invention without limitation, explains technical scheme of the present invention below with reference to accompanying drawing.
Embodiment
The impact test apparatus that present embodiment a kind of measures the loose material flowing pressure as shown in Figure 1, the launcher that comprises testing table and emission high velocity bullet, described launcher is arranged on the testing table, all employings steel of testing table and launcher is done, therefore have very big intensity, can bear conventional impact load.And described testing table is provided with the anchor clamps that a steel does not have end uncovered column barrel, described anchor clamps the first half inner diameter is greater than the latter half inner diameter, and be arranged with two anchor clamps through holes in anchor clamps the latter half, below, described anchor clamps inside is provided with the following bearing plate of steel cylinder, described bearing plate diametric(al) down is arranged with two columniform bearing plate through holes down, be provided with pressure transducer between described bearing plate through hole down and the testing table, the lead of described pressure transducer involves by the anchor clamps through hole, and in the described bearing plate through hole down the briquetting that the bearing plate through hole slides under the edge is set respectively, described briquetting passes down in the bearing plate through hole insertion pressure transducer simultaneously; Described anchor clamps inner and upper is provided with bearing plate, and the described transmitting aperture of going up bearing plate and launcher is oppositely arranged, and is provided with source of parallel light and velometer between simultaneously described last bearing plate and the transmitting aperture.
Described briquetting is made up of two steel cylinder up and down, and the first half cylinder diameter is slightly less than down the bearing plate through-hole diameter, and the latter half cylinder diameter is slightly less than pressure transducer slot diameter.
As shown in Figure 2, the synoptic diagram of anchor clamps is used for holding loose material, and anchor clamps are that a steel does not have end uncovered column barrel, and the first half inner diameter is arranged with two through holes greater than the latter half inner diameter in the latter half.
As shown in Figure 3, be the synoptic diagram of last bearing plate, last bearing plate is made up of two parts up and down, is steel cylinder, and diameter is slightly less than anchor clamps the first half inner diameter.
As shown in Figure 4, be the synoptic diagram of following bearing plate, following bearing plate is a steel cylinder, is arranged with two cylindrical holes in the bearing plate diametric(al),
As shown in Figure 4, be the synoptic diagram of briquetting, briquetting is made up of two steel cylinder up and down, and the first half cylinder diameter is slightly less than down the bearing plate through-hole diameter, and the latter half cylinder diameter is slightly less than pressure transducer slot diameter.
When assembling is used, at first anchor clamps are placed on the testing table center, following bearing plate is fixed in the anchor clamps, pressure transducer is over against the through hole of following bearing plate, place down the bearing plate below, the data line of pressure transducer is derived by the through hole of anchor clamps, is connected to the external data receiving equipment.Then briquetting the first half is put into down in the through hole of bearing plate, the latter half is inserted the pressure transducer slot.Pour loose material into anchor clamps, will go up bearing plate and be placed on the loose material reposefully.At last launcher is placed on the centre of testing table, settles source of parallel light and velometer, the emission high velocity bullet applies impact load to last bearing plate, the record pressure sensor data.After the off-test, bearing plate in the taking-up sieves the loose material after the fragmentation, to obtain the Size Distribution situation.
The preferred specific embodiment of described in conjunction with the accompanying drawings above the present invention only is used to illustrate embodiments of the present invention; rather than as restriction to aforementioned goal of the invention and claims content and scope; every foundation technical spirit of the present invention all still belongs to the technology of the present invention and rights protection category to any simple modification, equivalent variations and modification that above embodiment did.
Claims (2)
1. impact test apparatus of measuring the loose material flowing pressure, it is characterized in that: the launcher that comprises testing table and emission high velocity bullet, described launcher is arranged on the testing table, and described testing table is provided with the anchor clamps that a steel does not have end uncovered column barrel, described anchor clamps the first half inner diameter is greater than the latter half inner diameter, and be arranged with two anchor clamps through holes in anchor clamps the latter half, below, described anchor clamps inside is provided with the following bearing plate of steel cylinder, described bearing plate diametric(al) down is arranged with two columniform bearing plate through holes down, be provided with pressure transducer between described bearing plate through hole down and the testing table, the lead of described pressure transducer involves by the anchor clamps through hole, and in the described bearing plate through hole down the briquetting that the bearing plate through hole slides under the edge is set respectively, described briquetting passes down in the bearing plate through hole insertion pressure transducer simultaneously; Described anchor clamps inner and upper is provided with bearing plate, and the described transmitting aperture of going up bearing plate and launcher is oppositely arranged, and is provided with source of parallel light and velometer between simultaneously described last bearing plate and the transmitting aperture.
2. according to the impact test apparatus of the described measurement loose material of claim 1 flowing pressure, it is characterized in that: described briquetting is made up of two steel cylinder up and down, the first half cylinder diameter is slightly less than down the bearing plate through-hole diameter, and the latter half cylinder diameter is slightly less than pressure transducer slot diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320071855 CN203101223U (en) | 2013-02-07 | 2013-02-07 | Impact test device for measuring flowing pressure of discrete material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320071855 CN203101223U (en) | 2013-02-07 | 2013-02-07 | Impact test device for measuring flowing pressure of discrete material |
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| CN203101223U true CN203101223U (en) | 2013-07-31 |
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| CN 201320071855 Expired - Fee Related CN203101223U (en) | 2013-02-07 | 2013-02-07 | Impact test device for measuring flowing pressure of discrete material |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104515721A (en) * | 2014-12-22 | 2015-04-15 | 河海大学 | Device and method for measuring liquid flow-solid conversion mechanism in impact process |
| CN108535146A (en) * | 2018-03-19 | 2018-09-14 | 河海大学 | A kind of lower normal direction of the spherical particles system effect of being hit contacts force test method |
| CN109459312A (en) * | 2018-12-28 | 2019-03-12 | 中国电力工程顾问集团西北电力设计院有限公司 | A kind of bulk solid course loading test experimental rig and evaluation method |
| CN109668517A (en) * | 2018-11-23 | 2019-04-23 | 河海大学 | Electromagnetic impact lower sphere granular system arbitrary point normal strain measuring device and method |
| CN113654908A (en) * | 2021-07-23 | 2021-11-16 | 中国地质大学（武汉） | Particle compression test device and method with force chain and transverse deformation testing capacity |
-
2013
- 2013-02-07 CN CN 201320071855 patent/CN203101223U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104515721A (en) * | 2014-12-22 | 2015-04-15 | 河海大学 | Device and method for measuring liquid flow-solid conversion mechanism in impact process |
| CN108535146A (en) * | 2018-03-19 | 2018-09-14 | 河海大学 | A kind of lower normal direction of the spherical particles system effect of being hit contacts force test method |
| CN108535146B (en) * | 2018-03-19 | 2021-03-23 | 河海大学 | Method for testing normal contact force of spherical particle system under impact |
| CN109668517A (en) * | 2018-11-23 | 2019-04-23 | 河海大学 | Electromagnetic impact lower sphere granular system arbitrary point normal strain measuring device and method |
| CN109459312A (en) * | 2018-12-28 | 2019-03-12 | 中国电力工程顾问集团西北电力设计院有限公司 | A kind of bulk solid course loading test experimental rig and evaluation method |
| CN113654908A (en) * | 2021-07-23 | 2021-11-16 | 中国地质大学（武汉） | Particle compression test device and method with force chain and transverse deformation testing capacity |
| CN113654908B (en) * | 2021-07-23 | 2022-05-06 | 中国地质大学（武汉） | Particle compression test device and method with force chain and transverse deformation testing capacity |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130731 Termination date: 20160207 |