CN216955427U

CN216955427U - Protection device capable of preventing rod piece of Hopkinson pressure bar from collapsing

Info

Publication number: CN216955427U
Application number: CN202123296252.8U
Authority: CN
Inventors: 王磊; 商瑞豪; 刘怀谦; 袁秋鹏; 陈礼鹏; 邹鹏; 刘化强; 张宇; 张帅; 王安铖
Original assignee: Anhui University of Science and Technology
Current assignee: Anhui University of Science and Technology
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2022-07-12
Anticipated expiration: 2031-12-22

Abstract

The utility model discloses a protection device capable of preventing a Hopkinson pressure bar piece from collapsing, and belongs to the technical field of experimental equipment protection, wherein the pressure bar piece comprises two first supports, an absorption bar, a transmission bar and an incident bar are sequentially arranged between the first supports from left to right, fixed pull bars are symmetrically arranged on two sides of the incident bar, a plurality of protection mechanisms are arranged between the two fixed pull bars, each protection mechanism comprises an open type circular protection cover, two ends of each open type circular protection cover are connected with a semi-open type fixed cover through telescopic pull bars, two ends of each telescopic pull bar are respectively connected with the semi-open type fixed cover and the open type circular protection cover through nuts, and hinged supports are arranged on the outer sides of the semi-open type fixed covers; the protection device is simple in structure and convenient to operate, can ingeniously restrict the rod piece from deviating from the range of the impacted track, ensures the safety of testing personnel, increases the safety coefficient of the experimental device, and effectively prevents safety accidents.

Description

Protection device capable of preventing rod piece of Hopkinson pressure bar from collapsing

Technical Field

The utility model belongs to the technical field of experimental equipment protection, and particularly relates to a protection device capable of preventing a Hopkinson pressure bar rod piece from collapsing.

Background

In the fields of various scientific researches, engineering technologies, military technologies and the like, a plurality of problems of explosion vibration or impact load exist, and the mechanical properties of a material under the action of the impact load are extremely complex, so that the dynamic mechanical properties of the material are always one of the directions of important researches of scholars, wherein the Hopkinson pressure bar is considered as the most common experimental equipment for researching the dynamic mechanical properties of the material under the high strain rate.

The common separated Hopkinson pressure bar requires the incident bar, the test piece, the transmission bar and the absorption bar to be contacted with each other, and requires the end face of the bar to be completely flat, however, in the experiment processes of dynamic compression, shearing and the like, although a coupling agent (such as coupling agent like vaseline) is coated on the end face of the bar to avoid the phenomenon of uneven local contact stress caused by uneven end face, the condition that the state of the bar is extremely unstable due to overlarge axial pressure cannot be avoided in the actual operation process of the experiment, when the bar is subjected to impact load, the bar is extremely likely to deviate from an ideal track, the bar is greatly bounced, the bar is collapsed, and therefore safety accidents of laboratory staff and property loss of equipment are caused.

In addition, in the conventional protection device for the split hopkinson pressure bar, safety measures are only applied to the position of the test piece to prevent the test piece from impacting, breaking and splashing to cause safety accidents, but the collapse protection of the bar piece is obviously insufficient, so that in order to ensure the safety of the whole experimental environment, the corresponding protection device is extremely necessary to be arranged to protect the bar piece to restrict the deviation amplitude and range of the bar piece.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model aims to provide a protection device capable of preventing a Hopkinson pressure bar rod piece from collapsing, which is used for preventing the rod piece from deviating from an impact track to cause the injury of an experimental device and an experimental operator.

The purpose of the utility model can be realized by the following technical scheme:

a protection device capable of preventing a Hopkinson pressure bar member from collapsing comprises two first supports which are symmetrically arranged, an absorption bar, a transmission bar and an incident bar are sequentially arranged between the first supports from left to right, second supports are arranged on the absorption bar, the transmission bar and the incident bar, fixed pull rods are symmetrically arranged on two sides of the incident bar, and a plurality of protection mechanisms are arranged between the two fixed pull rods;

protection mechanism includes open type circular protection casing, open type circular protection casing's both ends are connected with the fixed cover of semi-open type through flexible pull rod, the both ends of flexible pull rod are passed through the nut and are connected with fixed cover of semi-open type and open type circular protection casing respectively, be equipped with the hinged-support on the outside of the fixed cover of semi-open type.

Furthermore, the semi-open type fixing cover comprises a first shell, a first high-elasticity rubber sleeve is arranged inside the first shell, and the inner wall of the first high-elasticity rubber sleeve is attached to the outer wall of the fixing pull rod.

Furthermore, open type circular protection casing includes the second shell, the inner wall of second shell is equipped with the high elasticity rubber sleeve of second, the diameter of the high elasticity rubber sleeve of second is greater than the diameter of incident pole, transmission pole and absorption pole.

Furthermore, the first shell is made of titanium alloy.

Furthermore, the telescopic pull rod is a positioning cap type pull rod.

The utility model has the beneficial effects that:

the protection device is simple in structure and convenient to operate, can ingeniously restrict the rod piece from deviating from the range of the impacted track, ensures the safety of testing personnel, increases the safety coefficient of the experimental device, and effectively prevents safety accidents.

Drawings

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the protection mechanism of the present invention;

fig. 3 is a schematic view of a threaded nut connection of the present invention.

The reference numbers in the figures illustrate:

1. a hinged support; 2. a semi-open type fixing cover; 3. a nut; 4. a second high-elasticity rubber sleeve; 5. a telescopic pull rod; 6. a protection mechanism; 7. an open circular shield; 8. a first high-elasticity rubber sleeve; 9. a first housing; 10. a transmission rod; 11. fixing a pull rod; 12. a second support; 13. a first support; 14. an absorption bar; 15. an incident rod; 16. a second housing.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.

A protection device capable of preventing a Hopkinson pressure bar from collapsing is disclosed, as shown in figures 1-3, the Hopkinson pressure bar comprises two first supports 13 which are symmetrically arranged, an absorption bar 14, a transmission bar 10 and an incident bar 15 are sequentially arranged between the first supports 13 from left to right, second supports 12 are arranged on the absorption bar 14, the transmission bar 10 and the incident bar 15, fixed pull rods 11 are symmetrically arranged on two sides of the incident bar 15, a plurality of protection mechanisms 6 are arranged between the two fixed pull rods 11, each protection mechanism 6 comprises an open type circular protection cover 7, two ends of each open type circular protection cover 7 are connected with a semi-open type fixed cover 2 through a telescopic pull bar 5, two ends of each telescopic pull bar 5 are respectively connected with the semi-open type fixed cover 2 and the open type circular protection cover 7 through nuts 3, each telescopic pull bar 5 is a positioning cap type pull bar, the length of each telescopic pull bar 5 can be adjusted freely by screwing the positioning cap during telescoping, the operation is convenient, the hinged support 1 is arranged on the outer side of the semi-open type fixed cover 2, the semi-open type fixed cover 2 comprises a first shell 9, a first high-elasticity rubber sleeve 8 is arranged in the first shell 9, the inner wall of the first high-elasticity rubber sleeve 8 is attached to the outer wall of the fixed pull rod 11, the hinged support 1 can conveniently sleeve the semi-open type fixed cover 2 on the fixed pull rod 11, the first high-elasticity rubber sleeve 8 can enable the fixed pull rod 11 and the first high-elasticity rubber sleeve 8 to generate strong friction force in tight contact, the first high-elasticity rubber sleeve 8 and the open type circular protective cover 7 are connected into a whole, the fixed position of the open type circular protective cover 7 is ensured not to move under the action of external force, the absorption rod 14, the transmission rod 10 and the incident rod 15 can be protected, the open type circular protective cover 7 comprises a second shell 16, the inner wall of the second shell 16 is provided with a second high-elasticity rubber sleeve 4, the diameter of the second high-elasticity rubber sleeve 4 is larger than the diameters of the incident rod 15, the transmission rod 10 and the absorption rod 14, the diameter is set to be slightly larger than the diameter of the rod piece, so that the second high-elasticity rubber sleeve 4 can be suspended around the rod piece and does not contact with the rod piece to protect the rod piece, the first high-elasticity rubber sleeve 8 and the second high-elasticity rubber sleeve 4 can effectively buffer acting force and prevent a titanium alloy shell from damaging the rod piece, and the first shell 9 and the second shell 16 are both made of high-strength titanium alloy and can effectively prolong the service cycle of the protection mechanism 6.

A use method of a protection device capable of preventing a Hopkinson pressure bar rod piece from collapsing comprises the following steps:

the method comprises the following steps: installing the open circular protective cover 7 on the impacted rods (such as an incident rod 15, a transmission rod 10 and an absorption rod 14);

step two: the two semi-open type fixed covers 2 are tightly sleeved on the fixed pull rods 11 at two sides of the Hopkinson pressure bar, the hinged support 1 faces outwards, the screw holes face inwards and are respectively connected with one ends of the two telescopic pull rods 5;

step three: the other ends of the two telescopic pull rods 5 are respectively connected with screw holes at two sides of the open type circular protective cover 7 to form a whole body, so as to protect the rod piece.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed.

Claims

1. A protection device capable of preventing a Hopkinson pressure bar from collapsing comprises two first supports (13) which are symmetrically arranged, wherein an absorption bar (14), a transmission bar (10) and an incident bar (15) are sequentially arranged between the first supports (13) from left to right, second supports (12) are arranged on the absorption bar (14), the transmission bar (10) and the incident bar (15), and fixed pull rods (11) are symmetrically arranged on two sides of the incident bar (15), and the protection device is characterized in that a plurality of protection mechanisms (6) are arranged between the two fixed pull rods (11);

protection mechanism (6) are including open type circular protection casing (7), the both ends of open type circular protection casing (7) are connected with semi-open type fixed cover (2) through flexible pull rod (5), the both ends of flexible pull rod (5) are passed through nut (3) and are connected with semi-open type fixed cover (2) and open type circular protection casing (7) respectively, be equipped with hinged-support (1) on the outside of semi-open type fixed cover (2).

2. The protection device capable of preventing the rod of the Hopkinson pressure bar from collapsing according to claim 1, wherein the semi-open type fixed cover (2) comprises a first shell (9), a first high-elasticity rubber sleeve (8) is arranged inside the first shell (9), and the inner wall of the first high-elasticity rubber sleeve (8) is attached to the outer wall of the fixed pull rod (11).

3. The protection device for preventing the collapse of the Hopkinson pressure bar according to claim 1, wherein said open circular protection cover (7) comprises a second outer shell (16), wherein a second high elasticity rubber sleeve (4) is arranged on the inner wall of said second outer shell (16), and the diameter of said second high elasticity rubber sleeve (4) is larger than the diameter of the incident bar (15), the diameter of the transmission bar (10) and the diameter of the absorption bar (14).

4. The protection device for preventing the collapse of the Hopkinson pressure bar according to claim 2, wherein the material of the first shell (9) is titanium alloy.

5. The protection device for preventing the collapse of the Hopkinson pressure bar according to claim 1, wherein the telescopic pull rod (5) is a positioning cap type pull rod.