CN107505189B

CN107505189B - A support and protection and fragment collect integrative device for hopkinson experiment

Info

Publication number: CN107505189B
Application number: CN201710916623.7A
Authority: CN
Inventors: 平琦; 张号; 苏海鹏
Original assignee: Anhui University of Science and Technology
Current assignee: Anhui University of Science and Technology
Priority date: 2017-09-30
Filing date: 2017-09-30
Publication date: 2020-08-11
Anticipated expiration: 2037-09-30
Also published as: CN107505189A

Abstract

The invention discloses a supporting, protecting and fragment collecting integrated device for a Hopkinson experiment. The device comprises an upper half protective cylinder, a lower half protective cylinder, a leaning connection, a fastener, a parallel track beam, a parallel track, a sliding bracket, a bucket, a foundation base, a bolt, a clamping groove and a fragment protective layer; the upper half protection cylinder is connected with the lower half protection cylinder through a leaning connection; two ends of the protective cylinder are provided with symmetrical round holes; the two parallel rails are connected through a parallel guide rail beam, a vertical long bolt hole is formed in the parallel guide rail beam, and the sliding bracket can move longitudinally on the guide rail; the bucket is connected with the parallel guide rail beam through two bayonets. The foundation slab is connected with the Hopkinson experimental device through bolts. The invention solves the problems that the test piece slides under the gravity in the Hopkinson experiment process, fragments after the experiment are collected, the fragments splash in the experiment process and the like. The split-type Hopkinson experimental device is simple in structure, fully functional, high in practicability and suitable for the existing Hopkinson experimental device.

Description

A support and protection and fragment collect integrative device for hopkinson experiment

The technical field is as follows: the invention relates to a supporting, protecting and fragment collecting integrated device for a Hopkinson experiment, and belongs to the field of material dynamic performance testing.

Background art:

the requirements of engineering application such as rock breaking, tunnel blasting tunneling, high-speed impact and the like can rapidly develop rock dynamics mainly based on the propagation of stress waves in rocks and dynamic mechanical properties of the rocks and some related marginal disciplines thereof, and promote the research of the dynamic properties of the rocks to be more and more extensive. At present, a separate Hopkinson pressure bar experimental device is generally adopted to research the mechanical properties of rocks at medium and high strain rates. Hopkinson, the first proposed in 1914, cannot directly observe stress waves due to the imperfect technological conditions at the time, and later Davies has been improved and developed in recent years, and hopkinson experimental devices have been increasingly perfected. Becoming a mature experimental device. Traditional experimental apparatus, the test piece is through the extrusion centre gripping of incident pole and transmission pole two poles, and the test piece that has scribbled the butter at both ends is more difficult for the centre gripping, can appear the landing, and the skew phenomenon for test piece both ends face can not align with the pole completely, causes the experimental data inaccurate. In the experimentation, the test piece is wrapped up in the wet towel of common use under the high-speed impact, and the parcel dynamics requires highly, touches the test piece easily and makes the test piece landing or skew cause eccentric atress, and the experimental data is wrong, and the wet towel is easy broken under the rock fragment effect that splashes at a high speed in addition, causes potential safety hazard and test piece fragment to collect the difficulty, causes to do the piece classification and fractal research difficulty under the rock impact load.

The invention content is as follows:

in view of the above situation, the present invention provides an integrated supporting, protecting and fragment collecting device for hopkinson experiments to solve the above problems. This device collects test piece support, fragment and collects, safety protection in an organic whole, and the structure is retrencied, and the operation of being convenient for is applicable to current hopkinson experimental apparatus.

The technical scheme adopted by the invention for realizing the aim is as follows:

a supporting, protecting and fragment collecting integrated device for a Hopkinson experiment comprises an upper half protective cylinder, a lower half protective cylinder, a leaning connection, a fastener, a parallel track beam, a parallel track, a sliding bracket, a bucket, a foundation base, a bolt, a clamping groove and a fragment protective layer; the upper half protection cylinder is connected with the lower half protection cylinder through a connecting link, the lower half protection cylinder is fixed with the base, the upper half protection cylinder can rotate around a connecting axis to open the protection cylinder, and a Hopkinson experimental test piece is placed; two ends of the protective cylinder are provided with symmetrical round holes, so that the incident rod and the transmission rod smoothly extend into the protective cylinder; the two parallel rails are connected through a parallel guide rail beam, a vertical long bolt hole is formed in the parallel guide rail beam, the upper position and the lower position of the parallel guide rail beam can be adjusted through adjusting the position of a bolt, the sliding bracket can longitudinally move on the guide rail, and the transverse position of the sliding bracket can be adjusted; the scraper bucket is connected with the parallel guide rail beam through two bayonets arranged on the scraper bucket, and the scraper bucket can support the bayonets to move leftwards through a handle to collect test piece fragments, so that fragment classification and fractal research under rock impact load can be conveniently carried out. The foundation slab is connected with the Hopkinson experimental device through bolts.

Compared with the prior art, the novel device has the innovation points that the problems of no support of the test piece, difficulty in collecting the broken pieces of the test piece, poor safety protection and the like in the Hopkinson experiment are effectively solved, and the novel device integrates the functions of supporting the test piece, collecting the broken pieces of the test piece, safety protection and the like. The invention has simple structure and convenient assembly, and is suitable for the existing Hopkinson experimental device.

Description of the drawings:

FIG. 1 is an overall outline view of an integrated support and shield and fragment collection device for Hopkinson testing according to the present invention.

FIG. 2 is a front view of an integrated support and shield and fragment collection device for Hopkinson testing in accordance with the present invention.

FIG. 3 is a side view of an integrated support and shield and fragment collection device for Hopkinson testing in accordance with the present invention.

FIG. 4 is a top view of an integrated support and shield and fragment collection device for Hopkinson testing in accordance with the present invention.

Sequence numbers in the upper figure: 1-upper half protection cylinder, 2-lower half protection cylinder, 3-parallel track beam, 4-parallel track, 5-movable bracket, 6-basic base, 7-bucket, 8-handle, 9-clamping groove, 10-fastener, 11-bolt, 12-vertical long bolt hole, 13-connecting block and 14-fragment protective layer

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described with reference to the accompanying drawings.

The embodiment shown in fig. 1 discloses a supporting, protecting and fragment collecting integrated device for a hopkinson experiment, which comprises an upper half casing (1), a lower half casing (2), a leaning connection (13), a fastener (10), a parallel track beam (3), a parallel track (4), a sliding bracket (5), a bucket (7), a foundation base (6), a bolt (11), a clamping groove (9) and a fragment protecting layer (14); the upper half protective barrel (1) is connected with the lower half protective barrel (2) through a leaning connection (13); two ends of the protective cylinder are provided with symmetrical round holes, so that the incident rod and the transmission rod smoothly extend into the protective cylinder; the two parallel rails (4) are connected through the parallel guide rail beam (3), the parallel guide rail beam (3) is provided with a vertical long bolt hole (12), the upper position and the lower position of the parallel guide rail beam can be adjusted through adjusting the position of a bolt, the sliding bracket (5) can longitudinally move on the guide rail, and the transverse position of the sliding bracket (5) can be adjusted; the bucket is connected with the parallel guide rail beam (3) through two clamping grooves (9) arranged on the bucket (7).

In the embodiment, the foundation slab (6) is connected with the Hopkinson experimental device through a bolt (11).

In this embodiment, the bucket has draw-in groove (9) of establishing on the bucket to block on parallel rail crossbeam (3), and when the experiment was accomplished, can take off bucket (7) and collect test piece scraper bowl and can hold up the bayonet socket and remove left and collect the test piece through the handle, is convenient for do piece classification and fractal research under the rock impact load. (ii) a

In the embodiment, the sliding bracket (5) can adjust the longitudinal position for clamping the test piece by longitudinally moving on the parallel rails (4); the vertical height of the rails is adjusted through longitudinal bolt holes in the parallel rail cross beams.

In this embodiment, go up and protect a section of thick bamboo (1) and protect a section of thick bamboo (2) down through leaning on even (13) to connect, protect a section of thick bamboo (2) down to fix on basic base (6), go up and protect a section of thick bamboo (1) and can be through leaning on even (13) rotation, when carrying out the hopkinson experiment, through the last section of thick bamboo of protecting around leaning on even axle center rotation, can be very convenient open protect a section of thick bamboo, put the experiment test piece.

The above description is only a preferred embodiment of the present invention, and these embodiments are based on different implementations of the present invention, and the scope of the present invention is not limited thereto, and any changes and substitutions that can be easily conceived by those skilled in the art and are within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. The utility model provides an integrative device is collected with protection and fragment to support for hopkinson experiment which characterized in that: the device comprises an upper half protective barrel (1), a lower half protective barrel (2), a leaning connection (13), a fastener (10), a parallel track beam (3), a parallel track (4), a sliding bracket (5), a bucket (7), a base (6), a bolt (11), a clamping groove (9) and a fragment protective layer (14); the upper half protective barrel (1) is connected with the lower half protective barrel (2) through a leaning connection (13), and the upper half protective barrel (1) can rotate through the leaning connection (13); two ends of the protective cylinder are provided with symmetrical round holes, so that the incident rod and the transmission rod smoothly extend into the protective cylinder; the parallel track beam (3) is arranged at the upper end of the lower half casing (2), the two parallel tracks (4) are connected through the parallel track beam (3), a vertical long bolt hole (12) is formed in the parallel track beam (3), the upper position and the lower position of the parallel track (4) can be adjusted through adjusting the position of a bolt, the sliding bracket (5) can longitudinally move on the parallel track (4), and the longitudinal position of the sliding bracket (5) can be adjusted; the bucket (7) is clamped on the parallel track beam (3) through two clamping grooves (9) arranged on the bucket; when the experiment is finished, taking down the bucket (7) to collect the fragments of the test piece; the lower half casing (2) is fixed on a base (6), and the base (6) is connected with a Hopkinson experimental device through a bolt (11).

2. The integrated supporting, protecting and fragment collecting device for the Hopkinson test according to claim 1, wherein: the sliding bracket (5) can longitudinally move on the parallel rails (4) to adjust the longitudinal position for clamping the test piece; the vertical height of the parallel track (4) is adjusted through a vertical long bolt hole (12) on the parallel track beam (3); the sliding bracket (5) can move longitudinally on the parallel tracks (4), and the longitudinal position of the sliding bracket (5) can be adjusted.

3. The integrated supporting, protecting and fragment collecting device for the Hopkinson test according to claim 1, wherein: the inner walls of the upper half protective barrel (1) and the bucket (7) are provided with a layer of rock fragment protective layer (14), so that fragments splashed at a high speed are prevented from directly impacting on the wall of the metal barrel, the fragments are broken again, and the fragments are guaranteed to be broken in the Hopkinson experiment process.

4. The integrated supporting, protecting and fragment collecting device for the Hopkinson test according to claim 1, wherein: the whole device is connected with a Hopkinson experiment main body device through a bolt (11).

5. The integrated supporting, protecting and fragment collecting device for the Hopkinson test according to claim 1, wherein: when a Hopkinson experiment is carried out, the upper half protection barrel (1) rotates around the connecting axis, so that the protection barrel can be conveniently opened, and an experiment test piece is placed.

6. The integrated supporting, protecting and fragment collecting device for the Hopkinson test according to claim 1, wherein: the scraper bowl (7) is clamped on the parallel track beam (3) through a clamping groove (9) formed in the scraper bowl, and when an experiment is completed, the scraper bowl (7) can be taken down to collect test piece fragments to perform fragment classification and fractal research under rock impact load.