Main coil structure of large-load electromagnetic Hopkinson bar loading gun

Abstract

The utility model discloses a main coil structure of a large-load electromagnetic Hopkinson bar loading gun, which comprises a coil base, a volute isolating bar is arranged on the inner side of the upper end of the coil base, a central positioning column is arranged in the middle of the volute isolating bar, a planar spiral groove is arranged between the volute isolating bar and the central positioning column, and a spiral coil is arranged in the planar spiral groove. A main coil is installed on the inner side of the planar spiral groove, a first planar installation groove is formed in one side of the volute isolation strip, a second planar installation groove is formed in the other side of the volute isolation strip, a protection end cover is installed on the upper end face of the volute isolation strip, and a first electrifying lug piece is installed on the inner side of the second planar installation groove; and a second electrifying lug is mounted on the inner side of the first plane mounting groove. According to the utility model, the coil during cutting is arranged, so that the repeatability of an experiment can be effectively met, the structural strength is high, deformation is not easy to occur, and large-load repeated loading of a material can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical property testing, in particular to a main coil structure of a large-load electromagnetic Hopkinson bar loading gun. Background Technique

[0002] In the fields of aviation, aerospace, transportation, etc., structures often encounter explosion or impact loads, such as an aircraft windshield being hit by a bird or a car collision in a traffic accident. Therefore, studying the mechanical response of materials under high strain rates is a requirement of practical applications. The electromagnetic Hopkinson bar test system is a new experimental method for studying the mechanical behavior of materials under high-speed loading. Its basic principle is that electromagnetic induction between the main coil and the secondary coil generates stress waves, thereby completing the loading of the specimen. The main coil structure of the electromagnetic Hopkinson bar loading gun often adopts a winding type and is reinforced and insulated by pouring insulating glue.

[0003] When performing large-load loading on materials, a large voltage discharge needs to be applied to the main coil. The main coil will be subjected to a large recoil, and the traditional winding type main coil is prone to damage, which will cause the experiment to fail. Therefore, it does not meet the existing requirements. For this reason, we propose a main coil structure of a large-load electromagnetic Hopkinson bar loading gun. Content of the Utility Model

[0004] The purpose of the utility model is to provide a main coil structure of a large-load electromagnetic Hopkinson bar loading gun to solve the problem that when performing large-load loading on materials, a large voltage discharge needs to be applied to the main coil, the main coil will be subjected to a large recoil, and the traditional winding type main coil is prone to damage, which will cause the experiment to fail as mentioned in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A main coil structure of a large-load electromagnetic Hopkinson bar loading gun, including a coil base, an inner side of the upper end of the coil base is provided with a spiral isolation strip, a center positioning column is installed in the middle of the spiral isolation strip, a planar spiral groove is provided between the spiral isolation strip and the center positioning column, a main coil is installed inside the planar spiral groove, a first planar installation groove is provided on one side of the spiral isolation strip, a second planar installation groove is provided on the other side of the spiral isolation strip, a protective end cover is installed on the upper end surface of the spiral isolation strip, a first energizing earpiece is installed inside the second planar installation groove, and a second energizing earpiece is installed inside the first planar installation groove.

[0006] Preferably, a center anti-deviation hole is provided in the middle of the protective end cover, two positioning protrusions are provided on the inner wall of the center anti-deviation hole, and the protective end cover and the two positioning protrusions are integrally injection molded.

[0007] Preferably, the protective end cap is sleeved on the outer side of the upper end of the central positioning post. The protective end cap and the central positioning post are snap-fitted and installed through two positioning protrusions. The coil base and the protective end cap are both made of epoxy fiberglass board FR-4.

[0008] Preferably, locking mounting holes are provided at the upper ends of the first energized earpiece and the second energized earpiece. A locking post is installed inside the locking mounting hole. Two power connection jacks are provided on one side of the bottom ends of the first energized earpiece and the second energized earpiece.

[0009] Preferably, the spiral isolation strip is arranged between the coil base and the central positioning post. The coil base, the central positioning post and the spiral isolation strip are integrally injection-molded. Insulating glue is filled between the main coil and the coil base, the central positioning post and the spiral isolation strip. The main coil is adhesively fixed to the spiral isolation strip.

[0010] Preferably, the cross-section of the main coil is spiral. The main coil is made of copper strip. The upper ends of the first energized earpiece and the second energized earpiece are both in close contact with the lower end face of the main coil.

[0011] Preferably, the first energized earpiece and the second energized earpiece are both fixedly connected to the coil base through the locking post. A cable is wound inside the power connection jack. The first energized earpiece and the second energized earpiece are both electrically connected to the cable.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. In the present utility model, the main coil is sleeved on the outer side of the central positioning post and fitted between the coil base and the spiral isolation strip. Insulating glue is filled on the surface of the main coil, so that the main coil is adhesively fixed to the coil base and the spiral isolation strip. The first energized earpiece and the second energized earpiece are fixedly installed on the coil base through the locking post. Furthermore, the upper ends of the first energized earpiece and the second energized earpiece are both in close contact with the lower end face of the main coil. By setting the cutting coil, the repeatability of the experiment can be effectively satisfied, and the structural strength is high and it is not easy to deform.

[0014] 2. In the present utility model, the protective end cap is sleeved and positioned on the outer side of the upper end of the central positioning post through the central anti-deviation hole. The protective end cap and the central positioning post are snap-fitted and installed through two positioning protrusions. Furthermore, the upper end face of the main coil can be protected and isolated by the protective end cap. The cable can be conveniently connected through the power connection jack. Furthermore, the main coil can be energized through the first energized earpiece and the second energized earpiece, and the large-load repeated loading of the material can be satisfied. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of the whole of the present utility model;

[0016] Figure 2 It is a schematic cross-sectional structure diagram of the whole of the present utility model;

[0017] Figure 3 It is an exploded structure diagram of the whole of the present utility model;

[0018] Figure 4 It is a partial cross-sectional structure diagram of the protective end cover of the present utility model;

[0019] Figure 5 It is a structure diagram of the spiral isolation strip of the present utility model.

[0020] In the figure: 1. Coil base; 2. Protective end cover; 3. Central positioning column; 4. First energized earpiece; 5. Second energized earpiece; 6. Electric connection jack; 7. Locking installation hole; 8. Main coil; 9. Locking column; 10. Central anti-deviation hole; 11. Positioning protrusion; 12. Spiral isolation strip; 13. First planar installation groove; 14. Second planar installation groove; 15. Planar spiral groove. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0022] Please refer to Figures 2 to 5 , an embodiment provided by the present utility model: A main coil structure of a large-load electromagnetic Hopkinson bar loading gun, including a coil base 1, a spiral isolation strip 12 is installed inside the upper end of the coil base 1, a central positioning column 3 is installed in the middle of the spiral isolation strip 12, a planar spiral groove 15 is provided between the spiral isolation strip 12 and the central positioning column 3, and a main coil 8 is installed inside the planar spiral groove 15. By connecting electricity to the main coil 8, a cutting coil can be easily formed, and the experimental repeatability is good;

[0023] On one side of the spiral isolation strip 12, there is a first planar mounting groove 13. On the other side of the spiral isolation strip 12, there is a second planar mounting groove 14. A protective end cover 2 is installed on the upper end surface of the spiral isolation strip 12. A first energizing earpiece 4 is installed inside the second planar mounting groove 14. A second energizing earpiece 5 is installed inside the first planar mounting groove 13. Locking mounting holes 7 are provided at the upper ends of the first energizing earpiece 4 and the second energizing earpiece 5. A locking post 9 is installed inside the locking mounting holes 7. On one side of the bottom ends of the first energizing earpiece 4 and the second energizing earpiece 5, there are two power connection jacks 6. The first energizing earpiece 4 and the second energizing earpiece 5 are both fixedly connected to the coil base 1 through the locking post 9. A cable is wound inside the power connection jacks 6. The first energizing earpiece 4 and the second energizing earpiece 5 are both electrically connected to the cable. The upper ends of the first energizing earpiece 4 and the second energizing earpiece 5 are both in close contact with the lower end surface of the main coil 8. It is convenient to stably energize the main coil 8 through the first energizing earpiece 4 and the second energizing earpiece 5.

[0024] Please refer to Figures 2 to 4 , the spiral isolation strip 12 is arranged between the coil base 1 and the central positioning post 3. The coil base 1, the central positioning post 3 and the spiral isolation strip 12 are integrally injection-molded. Insulating glue is filled between the main coil 8 and the coil base 1, the central positioning post 3 and the spiral isolation strip 12. The main coil 8 is adhesively fixed to the spiral isolation strip 12. The cross-section of the main coil 8 is spiral. The material of the main coil 8 is copper strip. Through the insulating glue, while the coil base 1 and the spiral isolation strip 12 protect and install the main coil 8, insulating filling can be carried out, thereby improving the stability of the main coil 8.

[0025] Please refer to Figure 1 and Figure 4 , in the middle of the protective end cover 2, there is a central anti-deviation hole 10. On the inner wall of the central anti-deviation hole 10, there are two positioning protrusions 11. The protective end cover 2 and the two positioning protrusions 11 are integrally injection-molded. The protective end cover 2 is sleeved on the outer side of the upper end of the central positioning post 3. The protective end cover 2 and the central positioning post 3 are snap-fitted and installed through the two positioning protrusions 11. The materials of the coil base 1 and the protective end cover 2 are both epoxy glass fiber board FR-4, which has high compressive strength and ductility and is suitable for large-load loading.

[0026] During use, the main coil 8 is sleeved on the outer side of the central positioning post 3 and fitted between the coil base 1 and the spiral isolation strip 12. The surface of the main coil 8 is filled with insulating glue, so that the main coil 8 is adhesively fixed to the coil base 1 and the spiral isolation strip 12. The first energizing earpiece 4 and the second energizing earpiece 5 are respectively inserted into the inside of the second planar mounting groove 14 and the first planar mounting groove 13 and fixedly installed with the coil base 1 through the locking post 9. Furthermore, the upper ends of the first energizing earpiece 4 and the second energizing earpiece 5 are both in close contact with the lower end surface of the main coil 8;

[0027] The protective end cover 2 is sleeved and positioned outside the upper end of the central positioning column 3 through the central anti-deviation hole 10, and two positioning protrusions 11 are provided on the inner wall of the central anti-deviation hole 10. The protective end cover 2 and the central positioning column 3 are snap-fitted and installed through the two positioning protrusions 11. Furthermore, the upper end surface of the main coil 8 can be protected and isolated through the protective end cover 2. Two power connection jacks 6 are provided at the bottom ends of the first power connection earpiece 4 and the second power connection earpiece 5, so that it is convenient to connect the cable through the power connection jacks 6. Furthermore, the cable can energize the main coil 8 through the first power connection earpiece 4 and the second power connection earpiece 5, and can meet the large-load repetitive loading of the material.

[0028] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be construed as limiting the claimed rights.

Claims

1. The main coil structure of a large-load electromagnetic Hopkinson bar loading gun, comprising a coil base (1), characterized in that: An inner side of the upper end of the coil base (1) is provided with a spiral isolation strip (12). A center positioning post (3) is installed in the middle of the spiral isolation strip (12). A planar spiral groove (15) is provided between the spiral isolation strip (12) and the center positioning post (3). A main coil (8) is installed inside the planar spiral groove (15). A first planar mounting groove (13) is provided on one side of the spiral isolation strip (12). A second planar mounting groove (14) is provided on the other side of the spiral isolation strip (12). A protective end cover (2) is installed on the upper end surface of the spiral isolation strip (12). A first energizing ear piece (4) is installed inside the second planar mounting groove (14). A second energizing ear piece (5) is installed inside the first planar mounting groove (13).

2. The main coil structure of a large-load electromagnetic Hopkinson bar loading gun according to claim 1, characterized in that: A center anti-offset hole (10) is provided in the middle of the protective end cover (2). Two positioning protrusions (11) are provided on the inner wall of the center anti-offset hole (10). The protective end cover (2) and the two positioning protrusions (11) are integrally injection-molded.

3. The main coil structure of a large-load electromagnetic Hopkinson bar loading gun according to claim 2, characterized in that: The protective end cover (2) is sleeved on the outer side of the upper end of the center positioning post (3). The protective end cover (2) and the center positioning post (3) are installed by snap connection through the two positioning protrusions (11). The coil base (1) and the protective end cover (2) are both made of epoxy glass fiber board FR-4.

4. The main coil structure of a large-load electromagnetic Hopkinson bar loading gun according to claim 1, characterized in that: Locking mounting holes (7) are provided at the upper ends of the first energizing ear piece (4) and the second energizing ear piece (5). A locking post (9) is installed inside the locking mounting holes (7). Two power connection jacks (6) are provided on one side of the bottom ends of the first energizing ear piece (4) and the second energizing ear piece (5).

5. The main coil structure of a large-load electromagnetic Hopkinson bar loading gun according to claim 4, characterized in that: The spiral isolation strip (12) is arranged between the coil base (1) and the center positioning post (3). The coil base (1), the center positioning post (3) and the spiral isolation strip (12) are integrally injection-molded. An insulating glue is filled between the main coil (8) and the coil base (1), the center positioning post (3) and the spiral isolation strip (12). The main coil (8) is fixedly bonded to the spiral isolation strip (12).

6. The main coil structure of a large-load electromagnetic Hopkinson bar loading gun according to claim 5, characterized in that: The cross section of the main coil (8) is spiral. The main coil (8) is made of copper strip. The upper ends of the first energizing ear piece (4) and the second energizing ear piece (5) are both in close contact with the lower end surface of the main coil (8).

7. The main coil structure of a large-load electromagnetic Hopkinson bar loading gun according to claim 6, characterized in that: The first energizing ear piece (4) and the second energizing ear piece (5) are both fixedly connected to the coil base (1) through the locking post (9). A cable is wound inside the power connection jack (6). The first energizing ear piece (4) and the second energizing ear piece (5) are both electrically connected to the cable.

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