Shock-resistant protective floor

Abstract

The utility model provides an anti-impact protective floor which comprises a panel and vibration isolators, each vibration isolator is of a hollow structure with one end sealed and the other end open, the projection area of the sealed ends of the vibration isolators on the panel is larger than that of the open ends of the vibration isolators on the panel, and therefore a plurality of vibration isolators can be conveniently stacked, stored and transported. The vibration isolator comprises a top plate and a web plate, and the web plate is made of high-resilience materials. The variable stiffness effect is generated by changing the structural state of the web, and the impact transmitted from the supporting base to the lower limbs of a person in the blasting impact environment can be absorbed. The buckling load critical value of the web is Fc and is larger than the static load Fm of the anti-impact object. Under normal conditions, the overall static rigidity of the anti-impact protection floor can meet the weight of a human body or equipment, and the vibration isolator does not generate obvious deformation; when the vibration isolator is subjected to blasting impact, the instant impact value Ft of the floor is larger than Fc, the web plate is subjected to buckling deformation, the dynamic stiffness of the vibration isolator is reduced, and the buffering energy absorption effect is improved. When the external impact disappears, the web rebounds to the initial position.

Description

Technical Field

[0001] The utility model relates to the technical field of personnel and equipment protection under blasting impact conditions, in particular to an impact-resistant protective floor. Background Art

[0002] Shock waves can cause severe impact vibrations to the hull and body of the ship, so certain impact protection measures need to be taken.

[0003] For example, in the prior art, when conducting blast impact tests, in order to protect nearby observers, it is necessary to build a temporary work room and set up an impact-resistant floor to prevent the explosion shock wave from causing damage to personnel and equipment. After the test, it is also required to remove the impact-resistant floor in time. However, the impact-resistant floor is difficult to remove and not easy to store, resulting in a large footprint. CN209857762U designed a vehicle lightning protection rubber pad that buffers the impact from the floor and disperses the explosion energy to reduce personal injury. However, after this type of vehicle lightning protection foot pad is laid over a large area, it is difficult to store and organize after use, and its overall impact resistance is limited. Utility Model Content

[0004] In view of this, the utility model aims to provide an impact-resistant protective floor with a simple structure. While providing good impact-resistant protection, it is easy to store and organize and saves space.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] An impact-resistant protective floor is installed on a supporting base. The impact-resistant protective floor includes a panel and a vibration isolator arranged below the panel. The vibration isolator is a hollow structure with one end sealed and the other end open. The projected area of ​​the sealed end of the vibration isolator on the panel is larger than the projected area of ​​the open end on the panel. The vibration isolator is a structure that is small at the top and large at the bottom, which is convenient for stacking multiple vibration isolators, convenient for storage and transportation, and greatly saves space.

[0007] Furthermore, the vibration isolator includes a top plate and a web, the sealing end of the vibration isolator is the top plate, one end of the web is connected to the top plate, and the other end is connected to the support base, the web is made of a high resilience material, and the top plate is arranged below the panel. The panel is used to provide load-bearing and support dispersion. The structural state change of the web produces a variable stiffness effect, which can absorb the impact transmitted from the support base to the lower limbs of personnel in an explosion impact environment, thereby reducing damage to personnel and equipment.

[0008] Furthermore, the web is made of any one of rubber and polyurethane materials, so that it can bend and deform when impacted, and the web rebounds to its initial position after the external impact disappears.

[0009] Furthermore, the critical value of the buckling load of the web is Fc, and the critical value of the buckling load Fc is greater than the static load Fm of the impact-resistant object. Under normal circumstances, the overall static stiffness of the impact-resistant protective floor can meet the weight of the human body or the weight of the equipment, and provide good support performance, and the vibration isolator does not produce obvious deformation; when subjected to blasting impact, the instantaneous impact value Ft of the floor is greater than the critical value of the buckling load Fc, and the web buckles and deforms, significantly reducing the dynamic stiffness of the vibration isolator, thereby improving the effect of buffering and energy absorption. When the external impact disappears, the web rebounds to its initial position.

[0010] Furthermore, the top plate and the panel are connected by embedded bolts, which facilitates the installation and removal of the vibration isolation pad and the panel. After the blasting impact test is completed, the impact-resistant protective floor can be quickly removed and stored.

[0011] Furthermore, the web is a variable thickness structure. Through the variable thickness design, the impact-resistant protective floor has a positioning yielding capability, so that the web yields at a target position during an explosion impact.

[0012] Furthermore, the top plate and the web plate are formed separately or integrally. Preferably, the top plate and the web plate are integrally formed, which is convenient for processing and manufacturing and improves the connection stability of the top plate and the web plate.

[0013] Furthermore, the impact-resistant protective floor is provided in plurality, and adjacent panels are connected by any one of snapping and gluing. The plurality of impact-resistant protective floors are laid in places prone to impact and vibration, so as to reduce the impact on personnel and / or equipment and protect the safety of personnel.

[0014] Compared with the prior art, the impact-resistant protective floor described in the utility model has the following advantages:

[0015] (1) The impact-resistant protective floor of the utility model is provided with a plurality of vibration isolators, and the plurality of vibration isolators can be stacked for convenient storage and transportation;

[0016] (2) The impact-resistant protective floor of the utility model has the characteristics of high static stiffness and low dynamic stiffness. Under normal circumstances, it can provide good support for impact-resistant objects. When an explosion occurs, it can increase the vibration isolation under the impact load and play a role of buffering protection;

[0017] (3) The web of the impact-resistant protective floor of the utility model adopts a thin-walled structure with variable thickness, which has a positioning yielding capability, so that the web of the vibration isolator can yield at the target position under the impact of the explosion;

[0018] (4) The belly plate of the impact-resistant protective floor of the utility model is made of a high-elasticity material. After the external impact disappears, the belly plate can rebound to its original position. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0020] Figure 1 This is a schematic structural diagram of an impact-resistant protective floor according to the utility model;

[0021] Figure 2 It is a structural schematic diagram of the vibration isolator described in the utility model;

[0022] Figure 3 It is a schematic diagram of the structure of stacking multiple vibration isolators according to the utility model;

[0023] Figure 4 for Figure 3 Section view in the AA direction;

[0024] Figure 5 It is a structural schematic diagram of the web plate of the utility model yielding at position A;

[0025] Figure 6 It is a structural schematic diagram of the web plate of the utility model yielding at position B;

[0026] Figure 7 This is the load-deformation curve of the vibration isolator described in the utility model.

[0027] Description of reference numerals:

[0028] 1. Panel; 2. Vibration isolator; 21. Top plate; 22. Web plate. DETAILED DESCRIPTION

[0029] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. The embodiments described in the present invention are exemplary and intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0030] It should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0031] like Figure 1-4As shown, an impact-resistant protective floor is installed on a supporting base, and the impact-resistant protective floor includes a panel 1 and a vibration isolator 2 arranged below the panel 1. The vibration isolator 2 is a hollow structure with one end sealed and the other end open. The vibration isolator 2 and the panel 1 are detachably connected. The panel 1 is fully or partially connected to at least one vibration isolator 2. In order to improve the impact resistance effect, a plurality of vibration isolators 2 are provided. Considering storage and space saving, the projected area of ​​the sealed end of the vibration isolator 2 on the panel 1 is larger than the projected area of ​​the open end on the panel 1, that is, the vibration isolator 2 is a structure that is small at the top and large at the bottom, as shown in FIG. Figure 3-4 As shown, multiple vibration isolators 2 can be stacked and placed conveniently for storage and transportation, and space can be greatly saved, which is conducive to the promotion and use of the impact-resistant floor of the present application.

[0032] The vibration isolator 2 includes a top plate 21 and a web 22. The sealing end of the vibration isolator 2 is the top plate 21. One end of the web 22 is connected to the top plate 21, and the other end is connected to the support base. The web 22 is a high resilience material, and the top plate 21 is arranged below the panel 1. When the impact-resistant protective floor of the utility model is in use, the vibration isolator 2 is laid on the support base, and the personnel step on the panel 1, and the panel 1 is used to facilitate the placement of the personnel's feet, or the equipment is placed on the panel 1, and the panel 1 is used to provide load-bearing and support dispersion. Since the vibration isolator 2 is hollow and forms a thin-walled structure, that is, the web 22 is a thin-walled structure, the structural state change of the web 22 is used to produce a variable stiffness effect, which can absorb the impact transmitted from the support base to the lower limbs of the personnel in the blasting impact environment, reduce the force on the lower limbs of the personnel, and thus reduce the damage to the personnel and equipment. Specifically, the critical value of the buckling load of the web 22 is Fc, and the critical value of the buckling load Fc is greater than the static load Fm of the impact-proof object, and the impact-proof object is the human body and / or equipment. Under normal circumstances, the overall static stiffness of the impact-resistant protective floor can meet the weight of the human body or the weight of the equipment, and provide good supporting performance, and the vibration isolator 2 does not produce obvious deformation; when subjected to blasting impact, the instantaneous impact value Ft of the floor is greater than the critical value Fc of the buckling load, and the web 22 undergoes buckling deformation, which significantly reduces the dynamic stiffness of the vibration isolator 2, thereby improving the effect of buffering and energy absorption. When the external impact disappears, the web 22 rebounds to its initial position and continues to provide support. The impact-resistant protective floor of the utility model has the characteristics of high static stiffness and low dynamic stiffness, and can meet the use requirements under different conditions. The load-deformation curve of the vibration isolator 2 is shown in Figure 7 As shown. A top plate 21 is arranged between the panel 1 and the web 22, which increases the connection points between the web 22 and the panel 1. The impact-resistant protective floor of the utility model can be used in a ship body, a vehicle, a room for blasting impact test, and the supporting base is a deck of a ship body, a car base of a vehicle, or a floor of a room.

[0033] The web 22 is made of any one of rubber and polyurethane materials, so that it can bend and deform when impacted, and rebound to its initial position after the external impact disappears.

[0034] The top plate 21 and the panel 1 are connected by any one of bolts and rivets. Preferably, the top plate 21 and the panel 1 are connected by pre-buried bolts, which facilitates the installation and removal of the vibration isolation pad 2 and the panel 1, and the impact-resistant protective floor can be quickly removed and stored after the blasting impact test.

[0035] Furthermore, the web 22 is a variable thickness structure. That is, the thickness of the web 22 is variable in the vertical direction. The thickness described in the utility model refers to the wall thickness of the web 22. Through the variable thickness design, the impact-resistant protective floor has a positioning yielding ability, so that the web 22 yields at the target position during the blasting impact. Usually, the web 22 yields at the thinnest place. Figure 5 As shown, the web 22 becomes thinner at the position close to the top plate 21, i.e., position A. When the vibration isolation pad 2 is compressed, the web 22 at position A bends and deforms toward the cavity formed by the web 22. Figure 6 As shown, the web 22 becomes thinner at a position away from the top plate 21, namely, at position B. When the vibration isolation pad 2 is compressed, the web 22 at position B bends and deforms toward a position away from the cavity.

[0036] The top plate 21 and the web 22 are formed separately or integrally. Preferably, the top plate 21 and the web 22 are integrally formed, which is convenient for processing and manufacturing, and improves the connection stability of the top plate 21 and the web 22. The angle between the tangents of the top plate 21 and the web 22 is determined according to the specific use conditions. Generally, the angle between the tangents of the top plate 21 and the web 22 is less than 150°. In the present utility model, there is no specific limitation on the shape of the top plate 21, and the top plate 21 is any one of a circle and a polygon.

[0037] In order to improve the impact resistance, the impact-resistant protective floor of the utility model is usually provided in multiple pieces when in use. Adjacent panels 1 are connected by any one of snaps and adhesives. Multiple impact-resistant protective floors are laid in places prone to impact vibration to reduce the impact on personnel and / or equipment and protect the safety of personnel. Specifically, the stiffness and number of the vibration isolator 2 are determined according to the experience of technicians in this field and the specific use conditions, so that the overall static stiffness of the impact-resistant protective floor meets the weight of personnel or equipment, and the supporting performance is good. Normally, the stiffness of a single vibration isolator 2 is not greater than 1000N / mm. In addition, the thickness and cross-sectional shape of the vibration isolator 2 are determined according to the experience of technicians in this field and the specific use conditions to determine the critical value Fc of the buckling load of the web 22. When an external impact occurs, when the instantaneous impact value Ft of the floor is greater than the critical value Fc of the buckling load, the web 22 buckles and deforms, significantly reducing the dynamic stiffness of the vibration isolator 2, thereby improving the effect of buffering and energy absorption.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An impact-resistant protective floor, installed on a supporting base, characterized in that: The impact-resistant protective floor comprises a panel (1) and a vibration isolator (2) arranged below the panel (1); the vibration isolator (2) is a hollow structure with one end sealed and the other end open; the vibration isolator (2) and the panel (1) are detachably connected; and the projection area of ​​the sealed end of the vibration isolator on the panel (1) is larger than the projection area of ​​the open end on the panel (1).

2. The impact-resistant protective floor according to claim 1, characterized in that: The vibration isolator (2) comprises a top plate (21) and a web plate (22); the sealed end of the vibration isolator (2) is the top plate (21); one end of the web plate (22) is connected to the top plate (21) and the other end is connected to a support base; the web plate (22) is made of a high resilience material; and the top plate (21) is arranged below the panel (1).

3. The impact-resistant protective floor according to claim 2, characterized in that: The web (22) is made of any one of rubber and polyurethane materials.

4. The impact-resistant protective floor according to claim 2, characterized in that: The critical value of the buckling load of the web (22) is Fc, and the critical value of the buckling load Fc is greater than the static load Fm of the impact-proof object.

5. The impact-resistant protective floor according to claim 2, characterized in that: The top plate (21) and the panel (1) are connected via embedded bolts.

6. The impact-resistant protective floor according to claim 2, characterized in that: The web (22) is a variable thickness structure.

7. The impact-resistant protective floor according to claim 2, characterized in that: The top plate (21) and the web plate (22) are formed separately or integrally.

8. The impact-resistant protective floor according to claim 1, characterized in that: A plurality of impact-resistant protective floors are provided, and adjacent panels (1) are connected by any one of snapping and gluing.

Images