Corrugated annular section cylinder outward turning energy absorption device

Abstract

A corrugated annular section cylinder outward turning energy absorption device comprises a conical turning table, a straight line pipe type energy absorption component, a round top plate, an energy absorption round pipe and a flower-shaped supporting plate. The circular top plate is fixedly arranged at the top end of the straight-line tubular energy-absorbing component, the energy-absorbing circular tube is coaxially located in the straight-line tubular energy-absorbing component, and the top end of the energy-absorbing circular tube is fixedly connected to the lower surface of the circular top plate. The conical overturning table is located under the straight-line tubular energy-absorbing component, the small-diameter end of the conical overturning table is upwards inserted into a lower-end tube opening of the straight-line tubular energy-absorbing component, the conical overturning table and the straight-line tubular energy-absorbing component are coaxially distributed, and an energy-absorbing round tube limiting groove is formed in the upper surface of the conical overturning table. The straight line pipe type energy absorption component expands and turns over to deform and absorb energy, interference of boundary constraint is avoided, the bending rigidity of the energy absorption component is greatly improved, deformation resistance is regulated and controlled through the combined action of self-compression deformation energy absorption of the energy absorption circular pipe and turning energy absorption of the straight line pipe type energy absorption component, and under axial impact compression, the deformation resistance is reduced, and the deformation resistance is improved. Abnormal deformation of expansion, buckling, stacking and instability of the energy absorption component is effectively avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the coal mine safety support technical field, especially a kind of corrugated annular section cylinder outer energy-absorbing device. BACKGROUND

[0002] Rock burst is the main dynamic disaster in coal mine, and also the worldwide mining problem. At present, rock burst mainly occurs in roadway, so the impact resistance design of effective roadway support system has become the most urgent problem faced by rock burst mine.

[0003] In order to improve the impact resistance and anti-impact capacity of roadway support, many mines will use high-strength roadway hydraulic support to strengthen the support of roadway, so as to significantly reduce the impact damage event of roadway, especially when the energy-absorbing device is installed in the roadway hydraulic support, the energy-absorbing device plays a good energy-absorbing and displacement role when rock burst occurs, and the anti-impact effect is more obvious.

[0004] Because the roadway hydraulic support usually controls its pressure by the pressure relief of the flow valve of hydraulic column to realize self-protection, but the pressure relief speed is limited, only in the case of quasi-static loading or small vibration impact of surrounding rock, the discharge pressure relief speed of flow valve can meet the requirements, once the impact energy is large, the flow valve will be damaged by high pressure, so that the flow valve cannot control its pressure by pressure relief, and in serious cases, it can cause the cylinder explosion or bending of hydraulic column, and further cause the overall tilting and damage of hydraulic support.

[0005] Therefore, when the energy-absorbing device is used with the roadway hydraulic support, the slow pressure relief speed of the flow valve of hydraulic column can be compensated by the energy-absorbing device, and the safety factor of the hydraulic support and roadway support system can be greatly improved.

[0006] At present, the energy-absorbing device widely used in roadway hydraulic support is usually designed based on pre-fold energy-absorbing component, which will deform and absorb energy according to the preset fold when rock burst occurs. Although the pre-fold energy-absorbing component has the advantages of high energy-absorbing rate and high space utilization rate, but because its bearing boundary is quadrilateral, it is easily disturbed by boundary constraint, and then abnormal deformation occurs in the buckling process, and finally the actual energy-absorbing effect cannot reach or deviate from the design target. UTILITY MODEL CONTENTS

[0007] The utility model discloses a corrugated annular section cylinder outer energy-absorbing device, adopts the innovative design straight line pipe type energy-absorbing component, compares with the traditional pre-folding mark energy-absorbing component, and the deformation energy absorption of straight line pipe type energy-absorbing component is expanded and turned, avoids the interference of boundary constraint, greatly improves the bending stiffness of energy-absorbing component, and the regulation and control of deformation resistance are realized through the common action of the compression deformation energy absorption of energy-absorbing pipe and the turning energy absorption of straight line pipe type energy-absorbing component, under the axial impact compression, can effectively avoid the abnormal deformation of energy-absorbing component expansion buckling stack instability, reliably guarantees the actual energy-absorbing effect of energy-absorbing component to meet the design target.

[0008] In order to achieve the above object, the utility model discloses the following technical scheme: a corrugated annular section cylinder outer energy-absorbing device, including conical overturning platform, straight line pipe type energy-absorbing component, circular top plate and energy-absorbing pipe, the straight line pipe type energy-absorbing component is vertically arranged, the circular top plate is horizontally fixed and is arranged at the top end of straight line pipe type energy-absorbing component, and the circular top plate and straight line pipe type energy-absorbing component are coaxial distribution, the conical overturning platform is located straight line pipe type energy-absorbing component directly below, and the small diameter end of conical overturning platform is inserted into the lower end pipe orifice of straight line pipe type energy-absorbing component upwards, and the conical overturning platform and straight line pipe type energy-absorbing component are coaxial distribution, the energy-absorbing pipe is located inside straight line pipe type energy-absorbing component, and the top end of energy-absorbing pipe is fixedly connected with the lower surface of circular top plate, and energy-absorbing pipe and straight line pipe type energy-absorbing component are coaxial distribution, and the axial length of energy-absorbing pipe is less than the axial length of straight line pipe type energy-absorbing component.

[0009] The annular space between the energy-absorbing pipe and the straight line pipe type energy-absorbing component is provided with a flower-shaped support plate, the outer contour shape and size of the flower-shaped support plate are the same as the inner surface contour shape and size of the straight line pipe type energy-absorbing component, the center hole diameter of the flower-shaped support plate is equal to the diameter of the energy-absorbing pipe, and a plurality of flower-shaped support plates are axially spaced apart.

[0010] An energy-absorbing pipe limiting groove is arranged at the center of the upper surface of the small-diameter end of the conical overturning platform, a threaded hole is arranged at the center of the energy-absorbing pipe limiting groove, and a lifting lug bolt is installed in the threaded hole.

[0011] A straight line pipe overturning stopper is circumferentially arranged at the large-diameter end of the conical overturning platform, and a first circular chamfer is arranged at the junction between the upper surface of the straight line pipe overturning stopper and the side conical surface of the conical overturning platform.

[0012] A second circular chamfer is arranged at the junction between the annular bottom surface and the inner side surface of the lower end pipe orifice of the straight line pipe type energy-absorbing component.

[0013] The cross-sectional shape of the straight-line tube type energy absorbing member is flower-shaped, including petal convex ribs and petal concave ribs, and the petal convex ribs and the petal concave ribs are uniformly and alternately distributed along the circumferential direction.

[0014] The number of the petal convex ribs and the petal concave ribs is equal and is denoted as m, the total number of the petal convex ribs and the petal concave ribs is denoted as 2m, and the included angle between adjacent petal convex ribs and petal concave ribs is denoted as γ, and it is required to satisfy γ = π / m.

[0015] The cross-sectional shape of the petal convex rib and the petal concave rib is circular arc shape, the inner circular arc of the petal convex rib is tangent to the outer circular arc of the petal concave rib, and the outer circular arc of the petal convex rib is tangent to the inner circular arc of the petal concave rib.

[0016] The center point of the straight-line tube type energy absorbing member is denoted as O1, the cross-sectional center point of the petal convex rib is denoted as O2, the cross-sectional center point of the petal concave rib is denoted as O3, the distance between the center point O1 and the center point O2 is denoted as R1, the inner circular arc radius of the petal convex rib is denoted as R2, the inscribed circle radius of the petal concave rib is denoted as R3, the distance between the center point O1 and the center point O3 is denoted as R4, the inscribed circle radius of the petal convex rib is denoted as R5, the wall thickness of the straight-line tube type energy absorbing member is denoted as t, the half included angle of the inner circular arc of the petal convex rib is denoted as θ, and the length of the center line circular arc of the petal convex rib is denoted as L t The length of the center line circular arc of the petal concave rib is denoted as L a The total length of the center line of the straight-line tube type energy absorbing member is denoted as L z The following relationships are required to be satisfied:

[0017] R4 = R2 + R3;

[0018] (2R2) 2 = R4 2 + R1 2 - 2cos(γ)·R4·R1;

[0019]

[0020] 0 < t < R2;

[0021] R5 = R1 + R2 + t;

[0022]

[0023]

[0024]

[0025] L z = m(L t + L a ) = 4θR2m - 2πR2 + πt.

[0026] The processing method of the straight-line tube type energy absorption component comprises the following steps:

[0027] Step one: make a processing device, which comprises a counterforce frame, a core mold, a pressure head and a hydraulic cylinder; the counterforce frame adopts a ring structure, the hydraulic cylinders are evenly arranged on the counterforce frame in the circumferential direction, the end of the piston rod of each hydraulic cylinder is fixedly installed with a pressure head, the core mold is fixedly arranged at the center of the inner side of the counterforce frame, and the central axes of all the hydraulic cylinders converge at the center of the core mold;

[0028] Step two: make a blank of the straight-line tube type energy absorption component, first, cut a rectangular plate, the thickness of the rectangular plate is selected according to the wall thickness t of the straight-line tube type energy absorption component, the length dimension of the rectangular plate is selected according to the total length L of the center line of the corrugation of the straight-line tube type energy absorption component z cutting, then send the cut rectangular plate into a rounding machine for rounding treatment until a cylindrical blank is formed, and then weld and fix the joint of the cylindrical blank;

[0029] Step three: sleeve the cylindrical blank outside the core mold, then synchronously start all the hydraulic cylinders in the circumferential direction, under the pressing force of the hydraulic cylinders, the pressure heads in the circumferential direction are synchronously close to the core mold until the cross-sectional shape of the cylindrical blank becomes a flower shape;

[0030] Step four: take out the prepared straight-line tube type energy absorption component from the processing device, then grind the boundary of the straight-line tube type energy absorption component blank, and at the same time, grind the second circular chamfer at the joint of the annular bottom surface and the inner side vertical surface of the lower end pipe of the straight-line tube type energy absorption component.

[0031] The wave-shaped annular cross-section cylinder outward turning energy absorption device has the advantages that:

[0032] The wave-shaped annular cross-section cylinder outward turning energy absorption device has the advantages that: the straight-line tube type energy absorption component is designed innovatively, compared with a traditional pre-fold mark energy absorption component, the straight-line tube type energy absorption component is deformed and absorbs energy through expansion and turning, interference of boundary constraint is avoided, the bending stiffness of the energy absorption component is greatly improved, the deformation resistance is regulated and controlled through the common action of the self-compression deformation energy absorption of the energy absorption pipe and the turning energy absorption of the straight-line tube type energy absorption component, under axial impact compression, abnormal deformation of expansion buckling and stacking instability of the energy absorption component can be effectively avoided, and the actual energy absorption effect of the energy absorption component can reliably meet the design target. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is a structural schematic view (axial side view) of a wave-shaped annular cross-section cylinder outward turning energy absorption device of the utility model;

[0034] Figure 2A structure schematic view (a forward section view perspective) of a corrugated annular cross section cylinder outer turning energy absorption device of the utility model;

[0035] Figure 3 A structure schematic view (an axial side perspective) of the flower-shaped support plate of the utility model;

[0036] Figure 4 A size parameter schematic view (a top view perspective) of the straight line pipe type energy absorption component of the utility model;

[0037] Figure 5 A processing equipment schematic view (a top view perspective) for straight line pipe type energy absorption component pressing;

[0038] Figure 6 A simulation analog test effect diagram of the corrugated annular cross section cylinder outer turning energy absorption device of the utility model;

[0039] Figure 7 A relationship diagram of the support reaction force and energy absorption amount of the straight line pipe type energy absorption component of the utility model in the test and impact displacement;

[0040] In the drawing, 1 is a conical turning table, 2 is a straight line pipe type energy absorption component, 3 is a circular top plate, 4 is a threaded hole, 5 is a straight line pipe turning stopper, 6 is a first circular chamfer, 7 is a second circular chamfer, 8 is a circular through hole, 9 is a petal convex rib, 10 is a petal concave rib, 11 is a reaction force frame, 12 is a core mold, 13 is a pressure head, 14 is a hydraulic cylinder, 15 is an energy absorption circular pipe, 16 is a flower-shaped support plate, 17 is an energy absorption circular pipe limiting groove, and 18 is a lifting lug bolt. DETAILED DESCRIPTION

[0041] The utility model will be further explained in detail in combination with the drawings and specific embodiments.

[0042] For example, Figures 1-4As shown, a corrugated annular cross-section cylinder outwardly inverting energy-absorbing device includes a conical inverting platform 1, a straight-fluted tube type energy-absorbing component 2, a circular top plate 3 and an energy-absorbing circular tube 15; the straight-fluted tube type energy-absorbing component 2 is vertically arranged; the circular top plate 3 is horizontally fixedly arranged at the top end of the straight-fluted tube type energy-absorbing component 2, and the circular top plate 3 and the straight-fluted tube type energy-absorbing component 2 are coaxially distributed; the conical inverting platform 1 is located directly below the straight-fluted tube type energy-absorbing component 2, the small-diameter end of the conical inverting platform 1 is inserted into the lower end port of the straight-fluted tube type energy-absorbing component 2 in an upward direction, and the conical inverting platform 1 and the straight-fluted tube type energy-absorbing component 2 are coaxially distributed; the energy-absorbing circular tube 15 is located inside the straight-fluted tube type energy-absorbing component 2, the top end of the energy-absorbing circular tube 15 is fixedly connected with the lower surface of the circular top plate 3, the energy-absorbing circular tube 15 and the straight-fluted tube type energy-absorbing component 2 are coaxially distributed, and the axial length of the energy-absorbing circular tube 15 is less than the axial length of the straight-fluted tube type energy-absorbing component 2; the deformation resistance is regulated by the combined action of the self-compression deformation energy absorption of the energy-absorbing circular tube 15 and the inverting energy absorption of the straight-fluted tube type energy-absorbing component 2.

[0043] A flower-shaped support plate 16 is arranged in the annular space between the energy-absorbing circular tube 15 and the straight-fluted tube type energy-absorbing component 2, the outer contour shape and size of the flower-shaped support plate 16 are the same as the inner surface contour shape and size of the straight-fluted tube type energy-absorbing component 2, the central hole diameter of the flower-shaped support plate 16 is equal to the diameter of the energy-absorbing circular tube 15; the number of the flower-shaped support plates 16 is several, and the several flower-shaped support plates 16 are distributed in an axial direction.

[0044] An energy-absorbing circular tube limiting groove 17 is arranged at the center of the upper surface of the small-diameter end of the conical inverting platform 1, a threaded hole 4 is arranged at the center of the energy-absorbing circular tube limiting groove 17, a lug bolt 18 is installed in the threaded hole 4, which facilitates the moving and dismounting of the conical inverting platform 1; a circular through hole 8 is formed at the center of the circular top plate 3, which facilitates the early installation and later dismounting of the circular top plate 3.

[0045] A straight-fluted tube inverting stopper 5 is arranged in the circumferential direction of the large-diameter end of the conical inverting platform 1, a first circular chamfer 6 is arranged at the joint between the upper surface of the straight-fluted tube inverting stopper 5 and the side conical surface of the conical inverting platform 1, which facilitates the smooth inverting of the straight-fluted tube type energy-absorbing component 2.

[0046] A second circular chamfer 7 is arranged at the joint between the annular bottom surface of the lower end port of the straight-fluted tube type energy-absorbing component 2 and the inner side surface, which facilitates the smooth inverting of the straight-fluted tube type energy-absorbing component 2.

[0047] The cross-sectional shape of the straight-fluted tube type energy-absorbing component 2 is flower-shaped, including petal convex ribs 9 and petal concave ribs 10, and the petal convex ribs 9 and the petal concave ribs 10 are uniformly and alternately distributed in the circumferential direction.

[0048] The number of the petal convex ribs 9 and the petal concave ribs 10 of the straight-line tube type energy absorbing member 2 is equal and is denoted as m, the total number of the petal convex ribs 9 and the petal concave ribs 10 is denoted as 2m, and the included angle between adjacent petal convex rib 9 and petal concave rib 10 is denoted as γ, so as to satisfy γ = π / m.

[0049] The cross-sectional shape of the petal convex rib 9 and the petal concave rib 10 is circular arc shape, the inner circular arc of the petal convex rib 9 is tangent to the outer circular arc of the petal concave rib 10, and the outer circular arc of the petal convex rib 9 is tangent to the inner circular arc of the petal concave rib 10.

[0050] The center point of the straight-line tube type energy absorbing member 2 is denoted as O1, the cross-sectional center point of the petal convex rib 9 is denoted as O2, the cross-sectional center point of the petal concave rib 10 is denoted as O3, the distance between the center point O1 and the center point O2 is denoted as R1, the inner circular arc radius of the petal convex rib 9 is denoted as R2, the inscribed circle radius of the petal concave rib 10 is denoted as R3, the distance between the center point O1 and the center point O3 is denoted as R4, the circumscribed circle radius of the petal convex rib 9 is denoted as R5, the wall thickness of the straight-line tube type energy absorbing member 2 is denoted as t, the half included angle of the inner circular arc of the petal convex rib 9 is denoted as θ, and the length of the middle line circular arc of the petal convex rib 9 is denoted as L t The length of the middle line circular arc of the petal concave rib 10 is denoted as L a The total length of the middle line of the straight-line tube type energy absorbing member 2 is denoted as L z The following relationships are required to be satisfied:

[0051] R4 = R2 + R3;

[0052] (2R2) 2 = R4 2 + R1 2 - 2cos(γ)·R4·R1;

[0053]

[0054] 0 < t < R2;

[0055] R5 = R1 + R2 + t;

[0056]

[0057]

[0058]

[0059] L z = m(L t + L a ) = 4θR2m - 2πR2 + πt.

[0060] Therefore, when the number m of the petal convex ribs 9 and the petal concave ribs 10 of the straight-line tube type energy absorption component 2, the distance R1 between the center point O1 and the center point O2, the inner circular arc radius R2 of the petal convex rib 9, and the wall thickness t of the straight-line tube type energy absorption component 2 are uniquely determined, the cross-sectional shape of the straight-line tube type energy absorption component 2 can be uniquely determined.

[0061] The processing method of the straight-line tube type energy absorption component 2 comprises the following steps:

[0062] Step one: make a processing equipment, such as Figure 5 As shown in the figure, the processing equipment comprises a counterforce frame 11, a core mold 12, a pressure head 13, and a hydraulic cylinder 14; the counterforce frame 11 adopts a ring structure, the hydraulic cylinders 14 are uniformly arranged on the counterforce frame 11 in the circumferential direction, the piston rod end of each hydraulic cylinder 14 is fixedly installed with a pressure head 13, the core mold 12 is fixedly arranged at the center inside the counterforce frame 11, and the central axes of all the hydraulic cylinders 14 converge at the center of the core mold 12; in this embodiment, the number of the hydraulic cylinders 14 is six, the maximum pressing force of all the hydraulic cylinders 14 is 500kN, the number of the pressure heads 13 is six, and the cross-sectional shape of the core mold 12 is six-petal flower shape;

[0063] Step two: make the blank of the straight-line tube type energy absorption component 2, first cut a rectangular plate, the thickness of the rectangular plate is selected according to the wall thickness t of the straight-line tube type energy absorption component 2, and the length dimension of the rectangular plate is selected according to the total length L of the straight-line tube type energy absorption component 2 z cutting, then the cut rectangular plate is sent into a rounding machine for rounding treatment until a cylindrical blank is formed, and then the joint of the cylindrical blank is welded and fixed; in this embodiment, the rectangular plate is made of HG785D plate;

[0064] Step three: the cylindrical blank is sleeved outside the core mold 12, and then all the hydraulic cylinders 14 in the circumferential direction are started synchronously, under the pressing force of the hydraulic cylinders 14, the pressure heads 13 in the circumferential direction are synchronously close to the core mold 12 until the cross-sectional shape of the cylindrical blank becomes flower shape; in this embodiment, the cross-sectional shape of the cylindrical blank becomes six-petal flower shape after pressing;

[0065] Step four: the straight-line tube type energy absorption component 2 is taken out of the processing equipment, then the boundary of the straight-line tube type energy absorption component 2 blank is ground, and at the same time, the second circular chamfer 7 at the junction of the annular bottom surface and the inner side surface of the lower end pipe of the straight-line tube type energy absorption component 2 is ground.

[0066] In this embodiment, the total height of the conical turnover table 1 is 80 mm, the diameter of the threaded hole 4 is 16 mm, the depth of the threaded hole 4 is 70 mm, the thickness of the straight-line tube turnover stopper 5 is 20 mm, the radius of the first circular chamfer 6 is 13.5 mm, the small-diameter end diameter of the conical turnover table 1 is 148.18 mm, the large-diameter end diameter of the conical turnover table 1 is 237.8 mm, the diameter of the straight-line tube turnover stopper 5 is 300 mm; the diameter of the energy-absorbing circular tube limiting groove 17 is 104 mm, the depth of the energy-absorbing circular tube limiting groove 17 is 10 mm, the vertical groove wall surface of the energy-absorbing circular tube limiting groove 17 has a 5° inclination; the wall thickness of the straight-line tube energy-absorbing component 2 is 6 mm, the distance between the center point of the straight-line tube energy-absorbing component 2 and the center point of the petal convex rib 9 is 80 mm, the axial length of the straight-line tube energy-absorbing component 2 is 310 mm, the inner circular arc radius of the petal convex rib 9 is 23 mm, the outer circular arc radius of the petal concave rib 10 is 15 mm, and the radius of the second circular chamfer 7 is 5 mm; the thickness of the circular top plate 3 is 10 mm, the diameter of the circular top plate 3 is 289 mm, and the diameter of the circular through hole 8 is 50 mm; the outer diameter of the energy-absorbing circular tube 15 is 102 mm, the inner diameter of the energy-absorbing circular tube 15 is 88.5 mm, and the axial length of the energy-absorbing circular tube 15 is 265 mm; the thickness of the flower-shaped support plate 16 is 10 mm, the center hole diameter of the flower-shaped support plate 16 is 102 mm, the number of the flower-shaped support plate 16 is two, the distance between the upper flower-shaped support plate 16 and the circular top plate 3 is 100 mm, and the distance between the lower flower-shaped support plate 16 and the circular top plate 3 is 150 mm; the threaded diameter of the lifting lug bolt 18 is 16 mm.

[0067] As Figure 6As shown in the figure, the buckling deformation process of the straight-tube energy-absorbing component 2 mainly consists of straight-tube unfolding, tube flaring, film-attached deformation, curling deformation, and stabilization deformation. First, the lower corrugated boundary of the straight-tube energy-absorbing component 2 expands in diameter. When it contacts the upper boundary of the first rounded chamfer 6, the lower corrugated boundary of the straight-tube energy-absorbing component 2 is fully unfolded. Subsequently, the lower end of the straight-tube energy-absorbing component 2 contacts the first rounded chamfer 6 and undergoes a plastic flaring process as the diameter of the first rounded chamfer 6 increases. During this process, the reaction force increases slightly. When the lower end of the straight-tube energy-absorbing component 2 contacts the lower boundary of the first rounded chamfer 6, the reaction force rises to its highest point due to the boundary constraint. At this time, the lower end of the straight-tube energy-absorbing component 2 and the straight-tube... The upper surface of the rotating edge 5 begins to contact the lower end of the straight tube energy-absorbing component 2. At this time, the lower end of the tube is subjected to the compressive stress of the axial load, the compressive stress of the turning table, and the circumferential tensile stress of the flaring. Under the action of the axial load, the lower end of the tube continues to deform along the first round chamfer 6. Since the deformation is free, when the lower end of the tube separates from the first round chamfer 6, under the action of the circumferential tensile stress, the lower end of the tube begins to curl upward. When the curling angle reaches a certain value, the reverse bending moment and the plastic bending moment will become equal, and the curling deformation will stop. As the tube turning deformation continues, the lower end of the tube of the straight tube produces a reverse curling and straightening deformation, thereby forming a double-layer tube wall, and then a stable outward turning deformation can be obtained.

[0068] like Figure 7 As shown in the figure, during the simulation of rockburst, the energy absorbed by the ruffled tube energy-absorbing component 2 during deformation increases with the increase of the impact displacement. Before the lower end of the ruffled tube energy-absorbing component 2 contacts the lower boundary of the first chamfer 6, the lower end of the ruffled tube energy-absorbing component 2 is in the stage of ruffled expansion and tube flaring, with a small support reaction force and a small change in energy absorption. After the lower end of the ruffled tube energy-absorbing component 2 contacts the lower boundary of the first chamfer 6, the support reaction force reaches its peak point due to the boundary constraint, and then enters the stages of film deformation, bending deformation, and stable deformation, with the energy absorption rapidly increasing and showing a linear increase. Specifically, the energy absorbed in the simulation experiment is 21.82 kJ, while the maximum energy absorbed in the actual experiment is 19.41 kJ, which is basically consistent.

[0069] The solutions in the embodiments are not intended to limit the scope of protection of this utility model. All equivalent implementations or modifications that do not depart from the scope of protection of this utility model are included in the scope of protection of this utility model.

Claims

1. A corrugated ring sectioned cylinder outwards energy absorbing device, characterized in that: The utility model provides a kind of energy-absorbing device, including conical turnover platform, straight line pipe type energy-absorbing component, circular top plate and energy-absorbing round pipe;The straight line pipe type energy-absorbing component is vertically arranged;The circular top plate is horizontally fixed and arranged at the top end of straight line pipe type energy-absorbing component, and the circular top plate and the straight line pipe type energy-absorbing component are coaxially distributed;The conical turnover platform is located below the straight line pipe type energy-absorbing component, and the small-diameter end of the conical turnover platform is inserted into the lower end port of the straight line pipe type energy-absorbing component upwards, and the conical turnover platform and the straight line pipe type energy-absorbing component are coaxially distributed;The energy-absorbing round pipe is located inside the straight line pipe type energy-absorbing component, and the top end of the energy-absorbing round pipe is fixedly connected with the lower surface of the circular top plate, and the energy-absorbing round pipe and the straight line pipe type energy-absorbing component are coaxially distributed, and the axial length of the energy-absorbing round pipe is less than the axial length of the straight line pipe type energy-absorbing component.

2. A corrugated ring sectioned tube outboard energy absorbing device according to claim 1 characterised in that: A plurality of flower-shaped support plates are arranged in the annular space between the energy-absorbing round pipe and the straight line pipe type energy-absorbing component, the outer contour shape and size of the flower-shaped support plates are the same as the inner surface contour shape and size of the straight line pipe type energy-absorbing component, the central hole diameter of the flower-shaped support plates is equal to the diameter of the energy-absorbing round pipe, and the plurality of flower-shaped support plates are axially spaced.

3. A corrugated ring section tube outboard energy absorbing device according to claim 1, characterized in that: A energy-absorbing round pipe limiting groove is arranged at the center of the upper surface of the small-diameter end of the conical turnover platform, a threaded hole is arranged at the center of the energy-absorbing round pipe limiting groove, and a lifting lug bolt is arranged in the threaded hole.

4. A corrugated ring section tube outboard energy absorbing device according to claim 1, characterized in that: A circular through hole is formed at the center of the circular top plate.

5. A corrugated ring section tube outboard energy absorbing device according to claim 1, characterized in that: A straight line pipe turnover stopper is circumferentially arranged at the large-diameter end of the conical turnover platform, and a first circular chamfer is arranged at the junction between the upper surface of the straight line pipe turnover stopper and the side conical surface of the conical turnover platform.

6. A corrugated ring sectioned tube outboard energy absorbing device according to claim 4, characterized in that: A second circular chamfer is arranged at the junction between the annular bottom surface of the lower end port of the straight line pipe type energy-absorbing component and the inner side vertical surface.

7. A corrugated ring sectioned tube outboard energy absorbing device according to claim 6, characterized in that: The cross-sectional shape of the straight line pipe type energy-absorbing component is flower-shaped, including petal convex ribs and petal concave ribs, and the petal convex ribs and the petal concave ribs are uniformly and alternately distributed in the circumferential direction.

8. A corrugated ring sectioned tube outboard energy absorbing device according to claim 7, characterized in that: The number of the petal convex ribs and the petal concave ribs is equal and is denoted as m, the total number of the petal convex ribs and the petal concave ribs is denoted as 2m, the included angle between adjacent petal convex ribs and petal concave ribs is denoted as γ, and γ=π / m is required to be satisfied.

9. A corrugated ring section tube outboard energy absorbing device according to claim 8, characterized in that: The center point of the straight-line tube energy-absorbing component is denoted as O1, the center point of the cross section of the petal convex rib is denoted as O2, the center point of the cross section of the petal concave rib is denoted as O3, the distance between the center point O1 and the center point O2 is denoted as R1, the inner circular arc radius of the petal convex rib is denoted as R2, the inscribed circle radius of the petal concave rib is denoted as R3, the distance between the center point O1 and the center point O3 is denoted as R4, the excircle radius of the petal convex rib is denoted as R5, the wall thickness of the straight-line tube energy-absorbing component is denoted as t, the inner circular arc half-angle of the petal convex rib is denoted as θ, and the center line circular arc length of the petal convex rib is denoted as L. t The center line circular arc length of the petal concave rib is denoted as L. a The total length of the center line of the straight-line tube energy-absorbing component is denoted as L. z The following relationship is required to be satisfied: The cross-sectional shape of the petal convex rib and the petal concave rib is circular arc shape, the inner circular arc of the petal convex rib is tangent to the outer circular arc of the petal concave rib, and the outer circular arc of the petal convex rib is tangent to the inner circular arc of the petal concave rib. (2R2) 2 = R4 2 + R1 2 - 2 cos(y) - R4- R1; R4=R2+R3; 0 R5=R1+R2+t; L z = m(L t + L a ) = 4θR2m - 2πR2 + πt.

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