An impact energy absorption protective device with non-uniform wall thickness diamond composite structure

Abstract

The present invention relates to the field of coal mine safety technology, and in particular to an impact energy absorption protective device with a non-uniform wall thickness rhombus composite structure, which aims to solve the problems of poor buffering energy absorption effect, poor collision resistance and impact resistance of existing impact energy absorption devices. The non-uniform wall thickness rhombus composite structure impact energy absorption protective device adopts a non-uniform wall thickness rhombus composite structure energy absorption layer as the main energy absorption component, and forms a composite honeycomb structure by combining a non-uniform wall thickness rhombus structure with a non-uniform wall thickness rhombus structure connecting arm. It not only fully utilizes the characteristics of the non-uniform wall thickness rhombus structure with small stiffness, excellent energy absorption characteristics, strong collision resistance and good bending resistance, but also gives play to the advantages of the honeycomb structure with light weight, high strength, high shear modulus, good notch resistance, fracture resistance, high resilience toughness, stable mechanical properties, excellent energy absorption capacity and strong impact resistance, so that the non-uniform wall thickness rhombus composite structure energy absorption layer has excellent energy absorption performance as a whole, and the structure is stable and reliable.

Description

Technical Field

[0001] The invention relates to the technical field of coal mine safety, and in particular to an impact energy absorption protection device with a non-uniform wall thickness rhombus composite structure. Background Art

[0002] Hydraulic supports are the main equipment for coal seam mining support. They not only provide safe working space for workers, but also support and control the roof of the working face. With the continuous development of the coal industry, the difficulty of coal mining is increasing, so the reliability requirements of hydraulic supports are getting higher and higher.

[0003] In the process of coal production, due to the complexity of geological conditions, hydraulic supports are in a harsh working environment. During the operation of the hydraulic support, the contact conditions between the top beam of the hydraulic support and the rock wall at the top of the coal mine tunnel are constantly changing, and the pressure they are subjected to is also constantly changing. In addition, due to the changes in the rock layer space, the top beam of the hydraulic support is constantly subjected to impact loads. The impact load is extremely destructive and will cause the telescopic column of the hydraulic support to expand, deform, or even burst. The proportion of support damage accidents caused by impact loads accounts for more than 50% of coal mine accidents. Therefore, the impact energy absorption protection device is of great significance to the use of hydraulic supports.

[0004] The existing impact energy absorbing device comprises a bottom support plate, a middle impact resistant structural component, a top support plate and a deformation pressure sensor. However, the existing impact energy absorbing device has poor buffering energy absorbing effect, poor collision resistance and impact resistance. Summary of the invention

[0005] The invention provides an impact energy absorbing protective device with a non-uniform wall thickness rhombus composite structure, so as to solve the problems of poor buffering energy absorbing effect, poor collision resistance and poor impact resistance of the existing impact energy absorbing devices.

[0006] In order to achieve the above-mentioned purpose, the present invention provides an impact energy absorption protection device of a non-uniform wall thickness diamond composite structure, comprising a base, a non-uniform wall thickness diamond composite structure energy absorption layer, a spring, a telescopic column and a top plate, wherein the lower end of the base is fixedly mounted on the top beam of the hydraulic support, the upper end of the base is evenly fixedly mounted with the telescopic column, the upper end of the telescopic column is fixed to the lower end surface of the top plate, the spring is sleeved on the telescopic column, five non-uniform wall thickness diamond composite structure energy absorption layers are arranged, and are fixed to the upper end surface of the base at equal intervals, a gap is arranged between the upper end of the non-uniform wall thickness diamond composite structure energy absorption layer and the top plate, and the non-uniform wall thickness diamond composite structure energy absorption layer is located in the space surrounded by the spring; The energy-absorbing layer of the wall thickness diamond composite structure includes a non-equal wall thickness diamond structure, a plurality of non-equal wall thickness diamond structures are horizontally connected in a row, two adjacent rows of non-equal wall thickness diamond structures are connected by a non-equal wall thickness diamond structure connecting arm, the non-equal wall thickness diamond structure and the non-equal wall thickness diamond structure connecting arm form a composite honeycomb structure, and the two lower sides of the non-equal wall thickness diamond structure are thickened to form a thick diamond wall; the telescopic column adopts a three-stage telescopic structure, the telescopic column includes a first-stage telescopic column, a second-stage telescopic column, and a third-stage telescopic column, the lower end protrusion of the second-stage telescopic column is slidably installed in the first-stage telescopic column, and the lower end protrusion of the third-stage telescopic column is slidably installed in the second-stage telescopic column.

[0007] In the above-mentioned non-equal wall thickness diamond composite structure impact energy absorption protection device, optionally, one diagonal line of the non-equal wall thickness diamond structure is horizontal, the other diagonal line is vertical, two adjacent rows of non-equal wall thickness diamond structures are staggered, the upper end of the non-equal wall thickness diamond structure connecting arm is connected to the left end or the right end of a non-equal wall thickness diamond structure, and the lower end of the non-equal wall thickness diamond structure connecting arm is connected to the upper end of another non-equal wall thickness diamond structure.

[0008] In the above-mentioned impact energy absorption protective device with non-uniform wall thickness rhombus-shaped composite structure, optionally, the energy absorption layer of the non-uniform wall thickness rhombus-shaped composite structure is made of nylon material.

[0009] In the above-mentioned impact energy absorbing protective device with non-uniform wall thickness rhombus-shaped composite structure, optionally, the lower end of the energy absorbing layer with non-uniform wall thickness rhombus-shaped composite structure is glued to the base.

[0010] In the above-mentioned impact energy absorption protection device with non-uniform wall thickness rhombus composite structure, optionally, the upper end of the spring is fixedly connected to the lower end surface of the top plate, and the lower end of the spring is fixedly connected to the upper end surface of the base.

[0011] In the above-mentioned impact energy absorption protection device with non-uniform wall thickness rhombus composite structure, optionally, the lower end of the base is fixed to the top beam of the hydraulic support by bolts.

[0012] The impact energy absorption protection device of the non-uniform wall thickness diamond composite structure provided by the present invention absorbs a part of the impact energy at the initial stage of the impact through the cooperation between the spring and the telescopic column, ensures the deformation direction of the device during the compression process, and improves the stability of the equipment; adopts the non-uniform wall thickness diamond composite structure energy absorption layer as the main energy absorption component, and forms a composite honeycomb structure by combining the non-uniform wall thickness diamond structure with the non-uniform wall thickness diamond structure connecting arm, which not only fully utilizes the characteristics of the non-uniform wall thickness diamond structure with small stiffness, excellent energy absorption characteristics, strong collision resistance and good bending resistance, but also gives play to the advantages of the honeycomb structure with light weight, high strength, high shear modulus, good notch resistance, fracture resistance, high rebound toughness, stable mechanical properties, excellent energy absorption capacity and strong impact resistance, so that the non-uniform wall thickness diamond composite structure energy absorption layer has excellent energy absorption performance as a whole, and the structure is stable and reliable.

[0013] The construction of the present invention and other objects and advantageous effects thereof will become more apparent through the description of the preferred embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 A schematic diagram of the overall structure of an impact energy absorption protection device with a diamond-shaped composite structure of unequal wall thickness provided by an embodiment of the present invention;

[0016] Figure 2 A schematic diagram of the main structure of a diamond-shaped composite structure impact energy absorption protection device with non-uniform wall thickness provided by an embodiment of the present invention;

[0017] Figure 3 A schematic side view of the structure of a diamond-shaped composite structure impact energy absorption protection device with unequal wall thickness provided by an embodiment of the present invention;

[0018] Figure 4 A schematic side view of the structure of an energy-absorbing layer of a diamond-shaped composite structure with non-uniform wall thickness of an impact energy-absorbing protective device with a diamond-shaped composite structure with non-uniform wall thickness provided in an embodiment of the present invention;

[0019] Figure 5 A schematic diagram of the three-dimensional structure of an energy-absorbing layer of a diamond-shaped composite structure with non-uniform wall thickness of an impact energy-absorbing protective device with a diamond-shaped composite structure with non-uniform wall thickness provided in an embodiment of the present invention;

[0020] Figure 6A schematic structural diagram of the telescopic columns of a non-uniform wall thickness rhombus composite structure impact energy absorption protection device provided in an embodiment of the present invention.

[0021] Description of reference numerals:

[0022] 1- Base;

[0023] 2-Non-uniform wall thickness diamond composite structure energy absorbing layer;

[0024] 21- Non-uniform wall thickness rhombus structure;

[0025] 211-Thick rhombus-shaped walls;

[0026] 22-composite honeycomb structure;

[0027] 221-Connecting arm with non-uniform wall thickness rhombus structure;

[0028] 3- Spring;

[0029] 4- Telescopic columns;

[0030] 401-First-level telescopic column;

[0031] 402 secondary telescopic column;

[0032] 403-three-stage telescopic column;

[0033] 5- Top plate. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme in the embodiment of the present invention will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present invention. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present invention, not all of them. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limitations on the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. The embodiments of the present invention are described in detail below in conjunction with the drawings.

[0035] like Figure 1-Figure 6As shown, the present invention provides an impact energy absorption protection device with non-uniform wall thickness rhombus composite structure, comprising a base 1, a non-uniform wall thickness rhombus composite structure energy absorption layer 2, a spring 3, a telescopic column 4 and a top plate 5, wherein the lower end of the base 1 is fixedly mounted on the top beam of the hydraulic support, the upper end of the base 1 is evenly fixedly mounted with the telescopic column 4, the upper end of the telescopic column 4 is fixed to the lower end surface of the top plate 5, the spring 3 is sleeved on the telescopic column 4, five non-uniform wall thickness rhombus composite structure energy absorption layers 2 are arranged, and are fixed to the upper end surface of the base 1 at equal intervals, a gap is arranged between the upper end of the non-uniform wall thickness rhombus composite structure energy absorption layer 2 and the top plate 5, and the non-uniform wall thickness rhombus composite structure energy absorption layer 2 is located in the space surrounded by the spring 3; the non-uniform wall thickness rhombus composite structure energy absorption layer 2 comprises non-uniform wall thickness rhombus composite structure energy absorption layer 2; A wall thickness diamond structure 21, a plurality of non-equal wall thickness diamond structures 21 are horizontally connected in a row, two adjacent rows of non-equal wall thickness diamond structures 21 are connected by a non-equal wall thickness diamond structure connecting arm 221, the non-equal wall thickness diamond structures 21 and the non-equal wall thickness diamond structure connecting arm 221 form a composite honeycomb structure 22, and the two lower sides of the non-equal wall thickness diamond structure 21 are thickened to form a thick diamond wall 211; the telescopic column 4 adopts a three-stage telescopic structure, the telescopic column 4 includes a primary telescopic column 401, a secondary telescopic column 402, and a tertiary telescopic column 403, the lower end protrusion of the secondary telescopic column 402 is slidably installed in the primary telescopic column 401, and the lower end protrusion of the tertiary telescopic column 403 is slidably installed in the secondary telescopic column 402.

[0036] It should be noted that the lower end of the first-level telescopic column 401 is fixed on the base 1, and the upper end of the third-level telescopic column 403 is fixed on the lower end surface of the top plate 5. The first-level telescopic column 401, the second-level telescopic column 402, and the third-level telescopic column 403 are nested to form a three-level telescopic structure of the telescopic column 4. The function of the telescopic column 4 is to limit the deformation direction of the spring 3 when the non-uniform wall thickness rhombus composite structure impact energy absorption protection device is subjected to impact force, to ensure that the deformation direction of the spring 3 is along the axial direction of the telescopic column 4, to prevent the spring 3 from being dislocated and causing permanent plastic deformation so that it cannot be restored to its initial state, and to improve the service life of the device. The spring 3 and the telescopic column 4 cooperate with each other to absorb part of the impact energy at the initial stage of the impact, and to ensure the deformation direction of the device during the compression process, thereby improving the stability of the equipment; a gap is set between the upper end of the non-uniform wall thickness rhombus composite structure energy absorption layer 2 and the top plate 5, so that the device has sufficient compression space.

[0037] In the actual working process, multiple non-uniform wall thickness diamond composite structure impact energy absorption protection devices are fixed to the top beam of the hydraulic support by bolts. The top plate 5 is in direct contact with the rock wall and directly bears the impact pressure. When the impact load or other pressure acts, the load on the top plate 5 suddenly increases sharply, first compressing the spring 3 and the telescopic column 4, and the spring 3 and the telescopic column 4 absorb a part of the pressure. After the compression amount of the spring 3 and the telescopic column 4 exceeds the gap between the non-uniform wall thickness diamond composite structure energy absorption layer 2 and the top plate 5, the non-uniform wall thickness diamond composite structure energy absorption layer 2 also produces corresponding deformation. During the compression and deformation process, the non-uniform wall thickness diamond composite structure energy absorption layer 2 will absorb a large amount of impact pressure, reduce the damage to the hydraulic support, and greatly improve the service life of the hydraulic support.

[0038] like Figure 4-Figure 5 As shown, one diagonal line of the non-equal wall thickness diamond structure 21 is horizontal, and the other diagonal line is vertical. Two adjacent rows of non-equal wall thickness diamond structures 21 are staggered. The upper end of the non-equal wall thickness diamond structure connecting arm 221 is connected to the left end or the right end of a non-equal wall thickness diamond structure 21, and the lower end of the non-equal wall thickness diamond structure connecting arm 221 is connected to the upper end of another non-equal wall thickness diamond structure 21.

[0039] It should be noted that the cross-section of the non-equal wall thickness diamond structure 21 is a diamond. Since the diamond structure has a relatively small stiffness, a large plastic deformation will occur when a collision occurs, delaying the transfer of loads and improving the energy absorption characteristics of the entire structure. It absorbs most of the energy and exhibits good collision resistance. The diamond structure will also reduce the degree of local damage in the collision area and has excellent collision resistance. The two lower sides of the non-equal wall thickness diamond structure 21 are thickened to form a thick diamond wall 211, which increases the bending stiffness of the structure and enhances the bending resistance of the component. The composite honeycomb structure 22 has the advantages of light weight, small specific gravity, high stiffness, high strength, high shear modulus, good resistance to notch, fracture and high resilience toughness, stable mechanical properties, excellent energy absorption capacity and strong impact resistance. The composite honeycomb structure 22 can not only realize the dual mechanical effects of in-plane deformation and out-of-plane load-bearing, but also has the characteristics of excellent vibration isolation, energy absorption, dent resistance, excellent elasticity and impact resistance mechanical and physical properties. Therefore, the energy-absorbing layer 2 of the non-uniform wall thickness diamond composite structure not only utilizes the characteristics of the diamond structure, but also integrates the advantages of the honeycomb structure. The energy-absorbing layer 2 of the non-uniform wall thickness diamond composite structure has excellent energy-absorbing performance as a whole, and the structure is stable and reliable. The diamond angle and height of the non-uniform wall thickness diamond structure 21 are selected according to the different models of the hydraulic support to have the best energy absorption and collision resistance.

[0040] like Figure 1-Figure 5 As shown, the energy absorbing layer 2 of the non-uniform wall thickness diamond-shaped composite structure is made of nylon material.

[0041] It should be noted that the non-uniform wall thickness diamond composite structure energy absorption layer 2 is made of nylon material, which has the advantages of ultra-light weight, high specific stiffness, and high energy absorption capacity. It still has good heat protection and insulation, energy absorption and noise reduction, and impact resistance in harsh working environments such as complex vibration and impact.

[0042] like Figure 1-Figure 3 As shown, the lower end of the non-uniform wall thickness diamond-shaped composite structure energy-absorbing layer 2 is glued to the base 1 .

[0043] It should be noted that the lower end of the non-uniform wall thickness diamond-shaped composite structure energy-absorbing layer 2 is fixed to the base 1 by a high-viscosity glue. The gluing process is simple and does not require complicated process equipment. The gluing operation does not have to be performed under high temperature and high pressure. Therefore, the glued parts are not easily deformed and the stress distribution of the joints is uniform.

[0044] like Figure 1-Figure 3 As shown, the upper end of the spring 3 is fixedly connected to the lower end surface of the top plate 5 , and the lower end of the spring 3 is fixedly connected to the upper end surface of the base 1 .

[0045] It should be noted that the spring 3 is a spring with a large damping coefficient. The spring 3 is mounted on the telescopic column 4 to ensure that the deformation direction of the protective device is vertical. The spring 3 plays a role in reducing pressure and preventing impact, and the telescopic column 4 plays a role in limiting.

[0046] like Figure 1-Figure 3 As shown, the lower end of the base 1 is fixed to the top beam of the hydraulic support by bolts.

[0047] It should be noted that the base 1 is a supporting component of the entire device, and the lower end of the base 1 is fixed to the top beam of the hydraulic support by bolts, which is convenient for disassembly, assembly and maintenance.

[0048] The impact energy absorption protection device of the non-uniform wall thickness diamond composite structure provided by the present invention absorbs a part of the impact energy at the initial stage of the impact through the cooperation between the spring 3 and the telescopic column 4, and ensures the deformation direction of the device during the compression process, thereby improving the stability of the equipment; the non-uniform wall thickness diamond composite structure energy absorption layer 2 is adopted as the main energy absorption component, and the non-uniform wall thickness diamond structure 21 and the non-uniform wall thickness diamond structure connecting arm 221 are combined to form a composite honeycomb structure 22, which not only fully utilizes the characteristics of the non-uniform wall thickness diamond structure 21 with small stiffness, excellent energy absorption characteristics, strong collision resistance and good bending resistance, but also gives play to the advantages of the honeycomb structure with light weight, high strength, high shear modulus, good notch resistance, fracture resistance, high rebound toughness, stable mechanical properties, excellent energy absorption capacity and strong impact resistance, so that the non-uniform wall thickness diamond composite structure energy absorption layer 2 has excellent energy absorption performance as a whole, and the structure is stable and reliable.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise precisely and specifically specified.

[0050] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An impact energy absorption protective device with a non-uniform wall thickness rhombus composite structure, characterized in that: It includes a base, a non-uniform wall thickness diamond composite structure energy-absorbing layer, a spring, a telescopic column and a top plate, the lower end of the base is fixedly mounted on the top beam of the hydraulic support, the upper end of the base is evenly fixedly mounted with the telescopic column, the upper end of the telescopic column is fixed to the lower end surface of the top plate, the spring is sleeved on the telescopic column, five non-uniform wall thickness diamond composite structure energy-absorbing layers are arranged, and are fixed to the upper end surface of the base at equal intervals, a gap is arranged between the upper end of the non-uniform wall thickness diamond composite structure energy-absorbing layer and the top plate, and the non-uniform wall thickness diamond composite structure energy-absorbing layer is located in the space surrounded by the spring; the non-uniform wall thickness diamond composite structure energy-absorbing layer includes non The invention discloses a rhombus structure with equal wall thickness, and a plurality of rhombus structures with non-equal wall thickness are connected in a row laterally. Two adjacent rows of rhombus structures with non-equal wall thickness are connected by a rhombus structure connecting arm with non-equal wall thickness. The rhombus structures with non-equal wall thickness and the rhombus structure connecting arms with non-equal wall thickness form a composite honeycomb structure. The two lower sides of the rhombus structures with non-equal wall thickness are thickened to form thick rhombus walls. The telescopic column adopts a three-stage telescopic structure, and the telescopic column includes a primary telescopic column, a secondary telescopic column, and a tertiary telescopic column. The lower end protrusion of the secondary telescopic column is slidably installed in the primary telescopic column, and the lower end protrusion of the tertiary telescopic column is slidably installed in the secondary telescopic column.

2. The impact energy absorption protection device of the non-uniform wall thickness diamond composite structure according to claim 1 is characterized in that: One diagonal line of the non-equal wall thickness diamond structure is horizontal, and the other diagonal line is vertical. Two adjacent rows of the non-equal wall thickness diamond structures are staggered. The upper end of the connecting arm of the non-equal wall thickness diamond structure is connected to the left end or the right end of one of the non-equal wall thickness diamond structures, and the lower end of the connecting arm of the non-equal wall thickness diamond structure is connected to the upper end of another non-equal wall thickness diamond structure.

3. The impact energy absorption protection device of the non-uniform wall thickness diamond composite structure according to claim 2 is characterized in that: The energy absorbing layer of the non-uniform wall thickness diamond-shaped composite structure is made of nylon material.

4. The impact energy absorption protection device of the non-uniform wall thickness diamond composite structure according to claim 1 is characterized in that: The lower end of the non-uniform wall thickness diamond-shaped composite structure energy-absorbing layer is glued to the base.

5. The impact energy absorption protection device of the non-uniform wall thickness diamond composite structure according to claim 4 is characterized in that: The upper end of the spring is fixedly connected to the lower end surface of the top plate, and the lower end of the spring is fixedly connected to the upper end surface of the base.

6. The impact energy absorption protection device of non-uniform wall thickness diamond composite structure according to any one of claims 1 to 5, characterized in that: The lower end of the base is fixed on the top beam of the hydraulic support by bolts.

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