CN209783413U - Explosion-proof energy-absorbing device - Google Patents
Explosion-proof energy-absorbing device Download PDFInfo
- Publication number
- CN209783413U CN209783413U CN201920591161.0U CN201920591161U CN209783413U CN 209783413 U CN209783413 U CN 209783413U CN 201920591161 U CN201920591161 U CN 201920591161U CN 209783413 U CN209783413 U CN 209783413U
- Authority
- CN
- China
- Prior art keywords
- cylindrical structure
- energy
- energy absorption
- primary
- mounting plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Vibration Dampers (AREA)
Abstract
the utility model relates to an explosion-proof energy-absorbing device belongs to the safety protection field. The energy absorption device comprises a horizontally arranged mounting plate and at least two energy absorption elements which are arranged in a straight line and are arranged at equal intervals, wherein the axis direction of the energy absorption elements is vertical to the mounting plate, and the mounting plate is fixedly connected with the energy absorption elements through mounting holes. The energy absorbing element includes a mounting plate with a mounting hole, a primary tubular structure, a secondary tubular structure, and an elastic core disposed inside the primary tubular structure. The primary cylindrical structure is placed in the secondary cylindrical structure, and the secondary cylindrical structure is fixedly connected with the mounting plate. Has the advantages that: the energy absorption device has the advantages of novel concept, simple structure, safe and convenient use and greatly improved energy absorption efficiency. The device is simple to assemble and light in weight, the technical problems of large weight and large occupied space in installation of the energy-absorbing element are solved, and the practicability is high. And because the required shape can be expanded on the basis of the energy absorption element according to specific conditions and requirements, the expansibility of the energy absorption device is further enhanced.
Description
Technical Field
The utility model relates to a safety protection field, in particular to explosion-proof energy-absorbing device.
background
peace and peace development has become the subject of development in the world today, but the danger of war still exists, such as historical legacy problem, regional dominance, economic interest conflict, democratic religion problem etc. regional conflict that arouses by them has not stopped, develops to some stage and arouses war. The features of modern wars can be summarized as: "conventional wars under nuclear deterrence conditions". On the one hand, the possibility of nuclear warfare still exists, and the "nuclear technology will be mastered by more and more countries", which is a harsh fact. On the other hand, conventional wars may be outbreaks at any time, such as the North bombing south Federation, the United states attacking Afghanistan, Iraq, and so forth. Modern weapon systems are continuously developing towards the direction of 'remote suppression, accurate striking and efficient damage', and military armor protection technology is urgently needed to be improved. The novel military material is a material basis for developing high and new armor protection technology, the novel structural design is an important means for improving armor protection capability, and the effective combination of the novel military material and the novel structural design is a fundamental guarantee for improving armor protection performance. In recent years, with the progress of science and technology, a batch of military weapons with large caliber, high power and high precision appear, so that the fact that cannon and plane missiles or missiles directly hit a structure for explosion or close range explosion becomes a reality, and the requirement that protection engineering must have extremely high impact resistance is required.
The protection device is mostly used for protecting important military weapons or other important objects, has strong requirements on the flexibility of the energy absorption device, and can be conveniently and quickly placed at a required position, which is always the target pursued in the protection field. With the rapid development of the power and the efficiency of various weapon systems, the requirement on the shock resistance of a protection device is higher and higher, the aim of improving the resistance is achieved by changing the device material at present, the homogeneous armor is developed into the composite armor by the current armor protection material, and the comprehensive anti-elasticity performance is greatly improved. In addition, researchers also propose simple sandwich structures such as honeycomb or round tube type energy absorption elements and the like to improve the armor protection capability, but the energy absorption structures basically rely on the plastic deformation of the device to absorb energy, and the energy absorption efficiency is low. Meanwhile, the installation of such elements generally requires a large space, which is not favorable for the miniaturization of the protection device, and the mass of such elements is generally large, which is not favorable for the light weight of the energy absorption device.
Disclosure of Invention
An object of the utility model is to provide an explosion-proof energy-absorbing device, the explosion-proof energy-absorbing device weight who has solved prior art existence is big, and the energy-absorbing is efficient, the big scheduling problem of occupation space. The utility model discloses have two-stage energy-absorbing structure, can realize hierarchical energy-absorbing.
The above object of the utility model is realized through following technical scheme:
The explosion-proof energy absorption device comprises a horizontally arranged mounting plate and at least two energy absorption elements which are arranged in a straight line and are arranged at equal intervals, wherein the axis direction of the energy absorption elements is vertical to the mounting plate, and the mounting plate is fixedly connected with the energy absorption elements through mounting holes.
the energy-absorbing element include mounting panel 14, one-level tubular structure 2, the second grade tubular structure 4 of taking the mounting hole and place the elasticity core 3 in one-level tubular structure 2 in, 2 outsourcing of one-level tubular structure have the annular rubber antivrbration pad 12, and the rubber antivrbration pad external diameter equals the 4 internal diameters of second grade tubular structure, relies on the elasticity of rubber antivrbration pad between one-level tubular structure 2 and second grade tubular structure 4, packs up the tiny gap between the two and packs up and reach the purpose of fastening. The secondary cylindrical structure 4 is fixedly connected with the mounting plate 14;
The outer cylinder walls on the front side and the rear side of the primary cylinder structure 2 are respectively provided with three induction grooves 13, the length of each induction groove 13 is 3/8 of the perimeter of the outer wall of the primary cylinder structure 2, the distance between every three induction grooves 13 in each row increases progressively from top to bottom and is 1/4 and 1/2 of the length of the primary cylinder structure 2 respectively;
A circle of semicircular ring structures 5 are arranged below the inner wall of the secondary cylindrical structure 4, the primary cylindrical structure 2 is arranged on the semicircular ring structures 5 in the secondary cylindrical structure 4, the axes of the primary cylindrical structure 2 and the semicircular ring structures 5 are collinear, and the rubber shock pads 12 are arranged at the contact parts.
The elastic core 3 comprises an upper baffle 7, a lower baffle 11, two rubber shock-proof pads 12, three conical springs 8, three supporting rods 9 and three spring seats 10, wherein the conical springs 8 are arranged perpendicular to the lower baffle 11, one ends of the conical springs are connected with the upper baffle 7 in a welding mode, the other ends of the conical springs are connected with the spring seats 10 in a welding mode, and the spring seats 10 are fixed on the lower baffle 11; the conical springs 8 are respectively sleeved on the supporting rods 9, the supporting rods 9 are of hollow metal structures, one ends of the supporting rods are welded with the upper baffle 7, and the other ends of the supporting rods are welded with the centers of the spring seats 10.
and the upper baffle 7 is provided with an anti-creeping tooth structure 1 in the transverse and longitudinal directions.
the edges of the upper baffle 7 and the lower baffle 11 are respectively coated with a rubber shockproof pad 12.
The rubber shock pad 12 is made of butadiene rubber.
The beneficial effects of the utility model reside in that: novel conception, simple structure, small volume, light weight and safe and convenient use. An energy absorption element is adopted, and the mounting plate, the primary and secondary cylindrical structures and the elastic core are matched. When collision occurs, the primary structure deforms firstly, the secondary structure deforms later, impact energy is converted into plastic deformation energy of the material, and the effect of absorbing energy step by step is achieved. The conical spring 8 in the elastic core 3 is elastically deformed, the primary structure and the secondary structure are plastically deformed, and the two forms absorb energy together, so that the energy absorption efficiency is greatly improved. The characteristic line of the conical spring is nonlinear, and the lateral stiffness is high, so that the stability is good, and the conical spring cannot sway left and right and is directly compressed vertically downwards when bearing pressure. And each pitch diameter of the conical spring is different, and a space enough for the spring to stretch and contract is provided, so that the service life of the conical spring in the spring is better. And the outer wall of the primary tubular structure is provided with an induction groove, so that the element is ensured to stably collapse and deform from front to back, and a support rod is arranged in the conical spring, so that automatic deviation correction is facilitated, and an additional guide structure is not needed, so that the problems of heavy weight, large installation space and the like of the energy-absorbing element are effectively solved. The elastic core in the primary cylindrical structure can utilize the buffering effect of the flexible support to increase the acting time of the explosive shock wave on the elastic core and slow down the peak effect of the explosive shock wave. The upper baffle is provided with the anti-climbing tooth structure in the transverse and longitudinal directions, so that the energy-absorbing element can be prevented from sliding when colliding, and other parts are damaged. The device is simple to assemble and light in weight, the technical problems of large weight and large occupied space in installation of the energy-absorbing element are solved, and the practicability is high. And because the required shape can be expanded on the basis of the energy absorption element according to specific conditions and requirements, the expansibility of the energy absorption device is further enhanced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate example embodiments of the invention and together with the description serve to explain the invention without limitation.
FIG. 1 is a schematic view of an internal structure of an energy absorber according to the present invention;
FIG. 2 is a schematic exterior view of an energy absorber according to the present invention;
FIG. 3 is an exploded view of the elastic core of the present invention;
Fig. 4 is a perspective view of the primary cylindrical structure of the present invention;
FIG. 5 is a front view of the second stage tubular structure of the present invention;
Fig. 6 is a cross-sectional view 1/2 of the two-stage tubular structure of the present invention;
fig. 7 is a schematic view of the three-dimensional structure of the mounting plate of the present invention;
Fig. 8 is a schematic perspective view of an energy absorber according to the present invention;
Fig. 9 is another perspective view of the energy absorber of the present invention.
In the figure: 1. an anti-creep tooth structure; 2. a primary tubular structure; 3. an elastic core; 4. a secondary cylindrical structure; 5. a semicircular ring structure; 6. mounting holes; 7. an upper baffle plate; 8. a conical spring; 9. a support bar; 10. a spring seat; 11. a lower baffle plate; 12. a rubber crash pad; 13. a guiding groove; 14. and (7) mounting the plate.
Detailed Description
The details of the present invention and its embodiments are further described below with reference to the accompanying drawings.
Referring to fig. 1 to 9, the explosion-proof energy-absorbing device of the present invention comprises a horizontally disposed mounting plate 14 and at least two energy-absorbing elements arranged in a straight line and equally spaced, wherein the axis direction of the energy-absorbing elements is perpendicular to the mounting plate 14, and the mounting plate 14 is fastened to the mounting hole 6 at the bottom of the secondary tubular structure 4 of the energy-absorbing elements. The mounting plate is made of metal materials with high bearing capacity and good rigidity. The mounting plate is provided with four mounting holes which are symmetrically distributed, and the mounting plate is fixedly connected with the lower bottom of the secondary tubular structure through the mounting holes. N1 energy absorbing elements.
The energy absorption element comprises a mounting plate 14 with a mounting hole, a primary cylindrical structure 2, a secondary cylindrical structure 4 and an elastic core 3 arranged in the primary cylindrical structure 2, wherein the primary cylindrical structure 2 and the secondary cylindrical structure 4 are welded together, and the secondary cylindrical structure 4 is fixedly connected with the mounting plate 14;
the primary cylindrical structure 2 is cylindrical and made of a plastically deformable metal material, and the primary cylindrical structure 2 can absorb energy generated during collision through plastic deformation of the primary cylindrical structure. Two rows of three induction grooves 13 are symmetrically arranged on the outer cylinder walls of the front side and the rear side of the primary cylinder structure 2, the length of each induction groove 13 is 3/8 of the perimeter of the outer wall of the primary cylinder structure 2, and the length direction of each induction groove is the same as the radial direction of the primary cylinder structure. The distance between each row of three induction grooves 13 increases progressively from top to bottom and is 1/4 and 1/2 of the length of the primary cylindrical structure 2 respectively; the width and depth of the induction groove 13 and the wall thickness, the tube diameter and the height of the primary cylindrical structure 2 and the secondary cylindrical structure 4 are determined according to specific situations and requirements, and are not limited herein.
A circle of semicircular ring structure 5 is arranged below the inner wall of the secondary cylindrical structure 4, the primary cylindrical structure 2 is arranged on the semicircular ring structure 5 in the secondary cylindrical structure 4, and the inner diameter of the semicircular ring structure 5 is smaller than that of the primary cylindrical structure. The secondary cylindrical structure is provided with a lower bottom, the thickness of the lower bottom is 1/2-2/3 of the thickness of the cylindrical wall of the secondary cylindrical structure, and the lower bottom is provided with a mounting hole matched with the mounting plate. The axes of the primary cylindrical structure 2 and the semi-circular structure 5 are collinear, and the contact parts are connected in a welding mode.
Referring to fig. 3, an elastic core 3 structure is arranged in the primary cylindrical structure 2, the elastic core 3 includes an upper baffle 7, a lower baffle 11, two rubber shock-proof pads 12, three conical springs 8 with completely the same structure, three support rods 9 with completely the same structure and material, and three same spring seats 10, the conical springs 8 are arranged perpendicular to the lower baffle 11, one end of each conical spring is connected with the upper baffle 7 in a welding manner, the other end of each conical spring is connected with the spring seat 10 in a welding manner, and the spring seats 10 are fixed on the lower baffle 11; the characteristic line of the conical spring 8 is nonlinear, and the lateral stiffness is high, so that the stability is good, and the conical spring is not shaken left and right when bearing pressure and is directly compressed vertically and downwards; the conical springs 8 are respectively sleeved outside the supporting rods 9, the supporting rods 9 are of hollow metal structures, one ends of the supporting rods are welded with the upper baffle 7, and the other ends of the supporting rods are welded with the centers of the spring seats 10.
The upper baffle 7 is provided with the anti-climbing tooth structure 1 in the transverse and longitudinal directions, and the depth of the tooth groove is 1/5-1/4 of the thickness of the upper baffle, so that the energy-absorbing element can be prevented from sliding when colliding, and other parts are damaged.
The upper baffle 7 and the lower baffle 11 are round cake-shaped anti-collision plates with the same structure, so that the impact force generated in collision can be uniformly transmitted to the whole energy-absorbing element, and the deformation stability of the energy-absorbing element is improved. The edges of the upper baffle 7 and the lower baffle 11 are respectively coated with rubber shock-proof pads 12, the rubber shock-proof pads 12 are circular rings and made of butadiene rubber. The outer diameter of the coated rubber shock pad 12 is equal to the inner diameter of the primary tubular structure 2, and the rubber shock pad has certain elasticity, so that the elastic core 3 is tightly installed in the primary tubular structure 2. The rubber shock pad 12 mainly has the functions of improving the assembly precision of the explosion-proof energy-absorbing device, absorbing the vibration generated by the elastic core and improving the energy-absorbing characteristic of the device. The elastic core 3 in the primary cylindrical structure 2 can increase the action time of the explosion shock wave on the elastic core by utilizing the buffering action of the flexible support, and the peak action of the explosion shock wave is slowed down.
referring to fig. 4 to 6, the cross sections of the primary cylindrical structure 2 and the secondary cylindrical structure 4 are circular, and the wall thickness of the secondary cylindrical structure 4 is 2-3 times of that of the primary cylindrical structure 2. The outer diameter of the primary cylindrical structure is slightly smaller than the inner diameter of the secondary cylindrical structure, the primary cylindrical structure and the secondary cylindrical structure are integrally formed, are made of metal materials, and have certain rigidity and plastic deformation characteristics.
The primary cylindrical structure 2 and the secondary cylindrical structure 4 are simple in structure, stable in deformation and clear in energy absorption principle, can provide a quite long deformation stroke, and can realize relatively large energy absorption. A semicircular ring structure 5 is arranged below the inner wall of the secondary cylindrical structure 4, the primary cylindrical structure 2 is arranged on the semicircular ring structure 5 arranged in the secondary cylindrical structure 4, the axes of the two structures are collinear, and the contact parts are connected in a welding mode. The first-level cylindrical structure 2 and the second-level cylindrical structure 4 are integrally formed, and the two structures are made of the same material through cutting or injection molding and casting through a set of mold, so that the overall structural strength of the energy absorption element is improved. The primary cylindrical structure 2 and the secondary cylindrical structure 4 are made of metal materials and have certain rigidity and plastic deformation characteristics.
Referring to fig. 7, the mounting plate 14 is a metal square plate with high strength and good rigidity, and the mounting plate 14 has four symmetrically distributed mounting holes 6.
Referring to fig. 1 to 9, the working principle of the present invention is as follows:
when the shock or collision is caused by the explosion load, the upper baffle 7 is firstly impacted, and the upper baffle 7 is an anti-collision plate and is used for enabling the structure containing the elastic core 3 at the lower part to deform more stably. Then, the conical spring 8 in the elastic core 3 is elastically deformed, which not only can absorb part of energy, but also can play a role in alleviating impact force and slowing down impact speed. At this time, the primary tubular structure 2 moves downwards rapidly under the impact action, and the rigidity of the tubular wall around the induction groove 13 is reduced by the induction groove at the tubular wall of the primary tubular structure 2, so that the induction groove 13 deforms first, and the primary tubular structure 2 is ensured to stably collapse and deform from front to back. And then, the primary cylindrical structure 2 and the elastic core 3 stably deform and absorb energy, and when the impact force or the collision force reaches a certain degree, the secondary cylindrical structure 4 participates in deformation and energy absorption. The secondary cylindrical structure 4 is subjected to plastic deformation through plastic deformation of the cylindrical wall and extrusion of the lower cylindrical inner semi-circular structure 5 by the primary cylindrical structure 2, so that impact energy is converted into plastic deformation energy of materials. So that most energy of the external load is absorbed by the energy absorption device, and important articles are protected.
the explosion-proof energy-absorbing device absorbs energy together by means of deformation of three conical springs in the elastic core and plastic deformation of the primary cylindrical structure and the secondary cylindrical structure, and the energy-absorbing efficiency is high; meanwhile, the radius and the thickness of the semi-circular ring structure in the secondary cylinder shape and the wire diameter and the effective number of turns of the conical spring can be changed according to different condition requirements, so that the expected effect is achieved.
the above description is only a preferred example of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made to the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides an explosion-proof energy-absorbing device which characterized in that: the energy absorption device comprises a horizontally arranged mounting plate and at least two energy absorption elements which are arranged in a straight line and are arranged at equal intervals, wherein the axis direction of the energy absorption elements is vertical to the mounting plate, and the mounting plate is fixedly connected with the energy absorption elements through mounting holes.
2. The explosion-proof energy-absorbing device according to claim 1, wherein: the energy absorption element comprises a mounting plate (14) with a mounting hole, a primary cylindrical structure (2), a secondary cylindrical structure (4) and an elastic core (3) arranged in the primary cylindrical structure (2), wherein the primary cylindrical structure (2) is arranged in the secondary cylindrical structure (4), and the secondary cylindrical structure (4) is fixedly connected with the mounting plate (14);
the outer cylinder walls on the front side and the rear side of the primary cylinder structure (2) are respectively provided with three induction grooves (13), the length of each induction groove (13) is 3/8 of the perimeter of the outer wall of the primary cylinder structure (2), the distance between every three induction grooves (13) in each row increases progressively from top to bottom and is 1/4 and 1/2 of the length of the primary cylinder structure (2);
A circle of semicircular ring structure (5) is arranged in the lower portion of the inner wall of the secondary cylindrical structure (4), the primary cylindrical structure (2) is arranged on the semicircular ring structure (5) in the secondary cylindrical structure (4), the axes of the primary cylindrical structure (2) and the semicircular ring structure (5) are collinear, and a rubber shockproof pad (12) is arranged at a contact part.
3. The explosion-proof energy-absorbing device according to claim 2, wherein: the elastic core (3) comprises an upper baffle (7), a lower baffle (11), two rubber shock-proof pads (12), three conical springs (8), three supporting rods (9) and three spring seats (10), wherein the conical springs (8) are arranged perpendicular to the lower baffle (11), one ends of the conical springs are connected with the upper baffle (7) in a welding mode, the other ends of the conical springs are connected with the spring seats (10) in a welding mode, and the spring seats (10) are fixed on the lower baffle (11); the conical springs (8) are respectively sleeved on the supporting rods (9), the supporting rods (9) are of hollow metal structures, one ends of the supporting rods are welded with the upper baffle (7), and the other ends of the supporting rods are welded with the centers of the spring seats (10).
4. An explosion-proof energy-absorbing device according to claim 3, wherein: the upper baffle (7) is provided with an anti-creeping tooth structure (1) in the transverse and longitudinal directions.
5. An explosion-proof energy-absorbing device according to claim 3, wherein: the edges of the upper baffle (7) and the lower baffle (11) are respectively coated with a rubber shockproof pad (12).
6. The explosion-proof energy-absorbing device according to claim 3 or 5, characterized in that: the rubber shock pad (12) is made of butadiene rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920591161.0U CN209783413U (en) | 2019-04-28 | 2019-04-28 | Explosion-proof energy-absorbing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920591161.0U CN209783413U (en) | 2019-04-28 | 2019-04-28 | Explosion-proof energy-absorbing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209783413U true CN209783413U (en) | 2019-12-13 |
Family
ID=68804274
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920591161.0U Active CN209783413U (en) | 2019-04-28 | 2019-04-28 | Explosion-proof energy-absorbing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209783413U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109974527A (en) * | 2019-04-28 | 2019-07-05 | 吉林大学 | Explosion-proof energy absorption device |
-
2019
- 2019-04-28 CN CN201920591161.0U patent/CN209783413U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109974527A (en) * | 2019-04-28 | 2019-07-05 | 吉林大学 | Explosion-proof energy absorption device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10408577B2 (en) | Resiliently mounted armor panel | |
| US4423802A (en) | Shock absorbers | |
| CN108146463B (en) | Honeycomb energy absorbing device | |
| CN107139874B (en) | Buffering energy-absorbing device with negative poisson ratio characteristic | |
| CN209783413U (en) | Explosion-proof energy-absorbing device | |
| CN109826892A (en) | A kind of reusable multistable energy-absorbing array combination structure | |
| CN110145562A (en) | A kind of Bamboo-shaped thin-wall tube structure is easily assembled multidirectional self-locking absorption systems | |
| CN110565828B (en) | Assembled bending metal damper | |
| CN105156537A (en) | Metallic spherical shock absorber | |
| CN109974527A (en) | Explosion-proof energy absorption device | |
| US9617730B1 (en) | Adaptive bearing energy absorber | |
| CN216789084U (en) | Viscous damper with large axial limiting force | |
| CN102673501A (en) | Thin-walled energy-absorbing device | |
| CN202641871U (en) | Thin-wall energy absorption tube strengthened by diaphragm plates | |
| CN210970943U (en) | Drum-type anti-collision beam | |
| CN215377540U (en) | Lithium battery with good damping performance | |
| CN209524036U (en) | A kind of buffering energy storage equipment | |
| CN111649116A (en) | Impact-resistant protection device for vehicle transfer case | |
| CN209053271U (en) | A kind of new steel structure building assembly damping device | |
| CN214275811U (en) | Shock attenuation energy-absorbing boiler explosion-proof door | |
| CN118405382B (en) | Shock absorber for transport container | |
| CN220262712U (en) | New energy automobile front anti-collision beam | |
| CN219013263U (en) | Vehicle-mounted terminal shock-absorbing structure and tool car | |
| CN214729707U (en) | Hybrid unmanned aerial vehicle's shock attenuation mounting structure | |
| CN214033517U (en) | Protection device and safety island |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220824 Address after: Room 14143, Unit 1, Block 1#-6#, Block B, Changchun Kuancheng Wanda Plaza, the intersection of Kaixuan Road and Taipei Street, Kuancheng District, Changchun City, Jilin Province 130000 Patentee after: Jilin Kelong Technology Development Co.,Ltd. Address before: 130000 No. 2699 Qianjin Street, Jilin, Changchun Patentee before: Jilin University |