Mining nanometer energy-absorbing vehicle stopping net and preparation method thereof

Abstract

The application belongs to the technical field of safety protection devices, and discloses a mine-used nano energy-absorbing vehicle stopping net and a preparation method thereof, which comprises a transverse pull rope, a longitudinal pull rope, a nano energy-absorbing module and a nano energy-absorbing ball. The longitudinal pull rope is provided with a first accommodating cavity for accommodating the nano energy-absorbing module. The first accommodating cavity wall of the longitudinal pull rope is woven with the transverse pull rope to form a net structure. The nano energy-absorbing module is formed by constraint fixing of the nano energy-absorbing ball. The relative position of the nano energy-absorbing ball is fixed by constraint fixing of the nano energy-absorbing ball to form the nano energy-absorbing module. The nano energy-absorbing ball is constraint fixed, so that the volume of the nano energy-absorbing ball is compressed after being impacted, and the energy-absorbing effect of the nano energy-absorbing ball is optimized.

Description

Technical Field

[0001] This invention belongs to the field of safety protection device technology, and in particular to a mining nano energy-absorbing vehicle blocking net and its preparation method. Background Technology

[0002] Trackless rubber-tired vehicles are an important component of inclined shaft rail transport systems in coal mines, characterized by speed, efficiency, and flexibility. However, during use, issues such as speeding, brake failure, or gear engagement failure may occur, leading to frequent "runaway" accidents, especially during inclined shaft transport, and even causing casualties. Therefore, the operating condition of trackless rubber-tired vehicles directly affects mine safety.

[0003] Currently, runaway vehicle barriers are one of the main interception devices for runaway vehicles in underground coal mines. This barrier system includes a barrier net, an energy-absorbing device, and a deployment / retraction device. The barrier net is typically made of steel wire rope. When a vehicle loses control, the barrier net is deployed via the deployment / retraction device to slow it down. However, the steel wire rope has a limited length, and when it reaches its end, the tension directly reduces the speed of the trackless rubber-wheeled vehicle to zero, potentially causing a rigid impact. This lack of flexible braking results in limited protection and makes it difficult to effectively control the vehicle.

[0004] In the prior art, patent CN216551383U discloses a mining nano energy-absorbing vehicle blocking net. By installing nano energy-absorbing material inside, when the nano energy-absorbing material is subjected to external impact, the external kinetic energy will force the non-wetting liquid to flow into the pores of the nanoporous material, converting the mechanical work of the external force into the interface energy and frictional heat energy of the solid-liquid interface, effectively reducing the impact load, with excellent buffering effect, realizing flexible braking, and intercepting vehicles. However, the following technical problems exist in this technical solution: (1) Since the main longitudinal bag contains nano-energy-absorbing balls, the position of the nano-energy-absorbing balls is relatively unfixed. When the vehicle is hit, the position of the nano-energy-absorbing balls will change, resulting in poor nano-buffering energy absorption effect; (2) The isotropic nature of the main longitudinal bag body results in the same degree of deformation on the impact surface or along the impact surface. The nano-energy-absorbing balls achieve the optimal energy absorption effect in the constrained space (i.e., control the deformation space of the nano-energy-absorbing balls so that the space occupied by the nano-energy-absorbing balls is reduced during the deformation process, and the non-wetting liquid enters the pores of the nanoporous material in turn). During the impact, most of the impact energy is absorbed by the anti-collision net, and the energy absorption effect of the nano-energy-absorbing balls is limited. Summary of the Invention

[0005] To overcome the problems in the background art, the purpose of this invention is to provide a mining nano-energy-absorbing vehicle barrier and its preparation method. The method forms a nano-energy-absorbing module by constraining and fixing nano-energy-absorbing balls, thereby fixing the relative positions of the nano-energy-absorbing balls and constraining and fixing the nano-energy-absorbing balls to ensure that the volume of the nano-energy-absorbing balls is compressed after being impacted, thus optimizing the energy absorption effect of the nano-energy-absorbing balls.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A mining-grade nano-energy-absorbing vehicle-blocking mesh, comprising:

[0008] Horizontal pull rope;

[0009] A longitudinal pull rope is provided with a first receiving cavity for accommodating a nano energy-absorbing module. The wall of the first receiving cavity of the longitudinal pull rope is woven with the transverse pull rope to form a mesh structure.

[0010] The nano-energy-absorbing module is formed by constraining and fixing nano-energy-absorbing spheres.

[0011] Preferably, the tension on the side of the longitudinal pull rope facing the impact direction is less than the tension on the side along the impact direction.

[0012] Preferably, the arc length of the transverse cross-section of the first receiving cavity on the side of the longitudinal pull rope along the impact direction satisfies the following relationship with the circumference of the entire first receiving cavity:

[0013]

[0014] Where l1 is the arc length of the transverse cross section of the first receiving cavity, r1 is the equivalent radius of the first receiving cavity or the equivalent radius of the nano energy-absorbing module in the first receiving cavity, R1 is the critical radius of the longitudinal tension rope, and λ1 is the correction coefficient.

[0015] Preferably, the longitudinal pull rope is made of flexible synthetic yarn on the side facing the impact direction, and is made of metal wire on the side along the impact direction.

[0016] Preferably, the longitudinal pull rope is made of flexible synthetic yarn, and the diameter of the flexible synthetic yarn on the side of the longitudinal pull rope facing the impact direction is smaller than that on the side of the longitudinal pull rope along the impact direction; or the longitudinal pull rope is made of flexible synthetic yarn, and the diameter of the flexible synthetic yarn on the side of the longitudinal pull rope facing the impact direction is the same as that on the side of the longitudinal pull rope along the impact direction, and the tensile strength of the flexible synthetic yarn on the side of the longitudinal pull rope facing the impact direction is smaller than that of the flexible synthetic yarn on the side of the longitudinal pull rope along the impact direction.

[0017] Preferably, the nano-energy-absorbing spheres are cast into a mold using polyurethane elastomer, and after cross-linking and curing, they form the nano-energy-absorbing module.

[0018] Preferably, the nano-energy-absorbing spheres are coated and isolated by weaving filaments.

[0019] Preferably, the transverse pull rope is provided with a second receiving cavity, which is used to receive the nano energy-absorbing module.

[0020] Preferably, the tension on the side of the transverse pull rope facing the impact direction is less than the tension on the side in the direction of impact;

[0021] The arc length of the transverse cross-section of the second receiving cavity on the side of the longitudinal pull rope along the impact direction satisfies the following relationship with the circumference of the entire second receiving cavity:

[0022]

[0023] Where l2 is the arc length of the transverse cross section of the second cavity, r2 is the equivalent radius of the second cavity or the equivalent radius of the nano-energy-absorbing module in the second cavity, and R2 is the critical radius of the longitudinal tension rope.

[0024] The transverse pull rope is located on the other side of the impact surface of the longitudinal pull rope, and the transverse pull rope and the longitudinal pull rope are connected as one unit along the impact direction by sewing. The sewn area is not less than the area formed by the arc length of the transverse section of the first cavity and the arc length of the transverse section of the second cavity, and does not exceed the area formed by half of the perimeter of the first cavity and the perimeter of the second cavity.

[0025] Another aspect of the present invention provides a method for preparing the above-mentioned mining nano-energy-absorbing vehicle mesh, comprising the following steps:

[0026] S1. Arrange several of the aforementioned horizontal pull ropes at a predetermined interval;

[0027] S2. A nano-energy-absorbing module of a preset size is installed in the second receiving cavity of the transverse pull rope;

[0028] S3. The transverse pull rope and the longitudinal pull rope are sewn together on one side along the impact direction;

[0029] S4. Repeat steps S2 and S3 until the required size of the vehicle barrier is produced;

[0030] S5. Insert a nano-energy-absorbing module of a preset size into the first receiving cavity of the longitudinal pull rope and perform end sealing.

[0031] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0032] In this invention, by fixing the position of the nano-energy-absorbing ball, it is possible to prevent the nano-energy-absorbing ball from shifting to both sides during the vehicle cushioning process, thus preventing a "discontinuity" that would significantly reduce the energy-absorbing cushioning effect and potentially damage the end-sealing structure on both sides of the longitudinal tension rope, causing the nano-energy-absorbing ball to overflow. By constraining the volume of the nano-energy-absorbing ball, this invention ensures that the volume of the nano-energy-absorbing ball is compressed after impact, optimizing the energy absorption effect of the nano-energy-absorbing ball and preventing the volume from increasing due to deformation of the nano-energy-absorbing ball, which would significantly reduce the cushioning performance of the nano-energy-absorbing cushioning material.

[0033] Furthermore, by controlling the tension of the longitudinal pull rope on the side facing the impact direction to be less than the tension on the side along the impact direction, when a vehicle impacts the vehicle barrier, the side facing the impact direction receives the impact force, which is transmitted to the energy absorption module. Subsequently, the energy absorption module applies a force to the side along the impact direction. When the tension on the side facing the impact direction is greater than or equal to the tension on the side along the impact direction, the side along the impact direction will deform more, while the side facing the impact direction will deform less. This deformation results in a smaller reduction in the volume of the energy absorption module, leading to a significant decrease in its energy absorption effect. However, in this invention, the tension of the longitudinal pull rope on the side facing the impact direction is less than the tension on the side along the impact direction. When a vehicle impacts the vehicle barrier, the side facing the impact direction deforms more, while the side along the impact direction deforms less. The combined deformation effects of the two sides result in a greater reduction in the volume of the energy absorption module, thereby improving its energy absorption effect.

[0034] Furthermore, since the connection between the horizontal and vertical pull ropes is the most vulnerable point to damage in the entire vehicle barrier net, and the sewing method also significantly affects the overall stability of the net and the energy absorption effect of the buffer module, this invention employs a planar sewing technique at the connection point. This involves flattening the connection between the horizontal and vertical pull ropes to form a flat surface, and then sewing it together with the vertical pull rope along the impact direction. This three-layer sewing—comprising the two layers formed by flattening the horizontal pull ropes and the surface along the impact direction with the vertical pull rope—improves the overall stability of the vehicle barrier net.

[0035] In the preparation of the mining nano energy-absorbing vehicle blocking net of the present invention, the transverse pull rope equipped with the nano energy-absorbing module and the longitudinal pull rope are sewn together on one side along the impact direction to form a mesh structure. The preparation process is simple and easy to implement, and the prepared vehicle blocking net has a good buffering effect. Attached Figure Description

[0036] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0037] Figure 1 This is a structural diagram of a mining nano-energy-absorbing barrier mesh provided in an embodiment of the present invention;

[0038] Figure 2 A longitudinal draw rope structure diagram provided for an embodiment of the present invention;

[0039] Figure 3 This is a schematic diagram of the current technology that uses only nano-energy-absorbing spheres to fill the stress area;

[0040] Figure 4 This is a schematic diagram of the nano-encapsulation module after being filled with force according to an embodiment of the present invention;

[0041] Figure 5 for Figure 4 Sectional view at point AA;

[0042] Figure 6 for Figure 4 Cross-sectional view of AA after the longitudinal tension rope is twisted;

[0043] Figure 7 This is a schematic diagram of a nano-encapsulation module structure provided in an embodiment of the present invention;

[0044] Figure 8 This is a schematic diagram of another nano-encapsulation module structure provided in an embodiment of the present invention;

[0045] Figure 9 This is a schematic diagram of the position structure of the longitudinal and transverse pull ropes provided in an embodiment of the present invention;

[0046] Figure 10 This is a schematic diagram of the horizontal pull rope arrangement provided in an embodiment of the present invention;

[0047] Figure 11 This is a schematic diagram of the nano-energy-absorbing module after being installed, as provided in an embodiment of the present invention;

[0048] Figure 12 This is a topographic image of the area after step S3 is completed, as provided in an embodiment of the present invention.

[0049] Figure 13 This is a topographic image after completing step S4, as provided in an embodiment of the present invention.

[0050] In the figure, 1 is the horizontal pull rope; 10 is the preset connection point; 2 is the vertical pull rope; 20 is the first receiving cavity; 3 is the nano energy-absorbing module; 30 is the nano energy-absorbing ball; and 31 is the polyurethane elastomer. Detailed Implementation

[0051] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the invention.

[0053] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0054] In the following description, when referring to the accompanying drawings, the same numbers in different drawings denote the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0055] In the description of this application, it should be understood that the terms "first," "second," "third," etc., are used only to distinguish similar objects and are not necessarily used to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0056] Furthermore, in the description of this application, unless otherwise stated, "multiple" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. The invention will be further described below with reference to the accompanying drawings and embodiments.

[0057] To address the limitations of existing technologies, this embodiment provides a technical solution. The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0058] Reference Figures 1-2 The present invention provides a mining nano energy-absorbing vehicle blocking net, including a transverse pull rope 1 and a longitudinal pull rope 2. The longitudinal pull rope is provided with a first receiving cavity 20, which is used to receive a nano energy-absorbing module 3. The first receiving cavity wall of the longitudinal pull rope 2 is woven with the transverse pull rope 1 to form a mesh structure.

[0059] The longitudinal tension rope 2 is woven from warp and weft threads, which can be flexible synthetic materials, including but not limited to high-performance materials such as ultra-high molecular weight polyethylene fiber and DuPont Kevlar fiber. When used in mining conditions, the flexible synthetic material must meet flame-retardant and anti-static requirements, and possess characteristics such as light weight and high load-bearing capacity. Alternatively, the warp and weft threads can also be made of metal, specifically, woven from metal wire. The transverse tension rope 1 can also be manufactured using the same process as the longitudinal tension rope 2.

[0060] It should be noted that the "longitudinal" and "lateral" directions mentioned above refer to positions relative to the ground, such as... Figure 1 As shown in the diagram, the longitudinal rope 2 is vertical and perpendicular to the ground; the transverse rope 1 is horizontal and parallel to the ground.

[0061] The nano-energy-absorbing module 3 is formed by constraining and fixing the nano-energy-absorbing ball 30 through end-sealing structures on both sides of the longitudinal pull rope 2. Specifically, the nano-energy-absorbing ball 30 is made of nano-energy-absorbing material encapsulated in TPU (thermoplastic polyurethane elastomer). The nano-energy-absorbing material is prepared by mixing a non-wetting liquid and a nanoporous material. The non-wetting liquid includes one or more of deionized water, lubricating oil, ethylene glycol, and glycerol. The nanoporous material is one or more of nanoporous molecular sieves ZSM-5, ZSM-22, zeolite, silica, alumina, silica, activated carbon, titanium dioxide, and carbon nanotubes. The energy absorption density can reach above 30 J / g, and it is a uniform and flowable liquid under normal conditions. When the nano-energy-absorbing material is subjected to external impact, the external kinetic energy forces the non-wetting liquid to flow into the pores of the nanoporous material, converting the mechanical work of the external force into solid-liquid interfacial energy and frictional heat energy. After the external force is removed, the non-wetting liquid flows out of the nanopores. The nano-energy-absorbing material can be reused multiple times.

[0062] By constraining and fixing the nano-energy-absorbing ball 30, two technical effects are achieved: First, the position of the nano-energy-absorbing ball 30 is fixed, preventing it from shifting to either side during vehicle cushioning, thus avoiding a "discontinuity" that would significantly reduce the energy-absorbing cushioning effect and potentially damage the end-sealing structure on both sides of the longitudinal tension rope 2, causing the nano-energy-absorbing ball 30 to overflow. Figure 3 As shown, when a vehicle hits the vehicle barrier at a speed of v, the nano-energy-absorbing ball 30 moves to both sides; secondly, the present invention constrains the volume of the nano-energy-absorbing ball 30 to prevent the volume from increasing due to deformation of the nano-energy-absorbing ball 30, which would greatly reduce the buffering performance of the nano-energy-absorbing material.

[0063] To improve the constraint of the longitudinal tension rope 2 on the buffer energy absorption module 3, the tension of the longitudinal tension rope 2 on the side X facing the impact direction is less than the tension on the side Y along the impact direction. For example... Figure 4 As shown, when a vehicle impacts the vehicle barrier at speed v, the side X facing the impact direction receives the impact force, which is transmitted to the energy absorption module 3. The energy absorption module 3 then applies a force to the side Y along the impact direction. When the tension on the side X facing the impact direction is greater than or equal to the tension on the side Y along the impact direction, the side Y along the impact direction deforms more, while the side X facing the impact direction deforms less. This deformation results in a smaller reduction in the volume of the energy absorption module 3, significantly reducing its energy absorption effect. However, in this invention, the tension on the side X facing the impact direction of the longitudinal tension rope 2 is less than the tension on the side Y along the impact direction. When the vehicle impacts the vehicle barrier at speed v, the side X facing the impact direction deforms more, while the side Y along the impact direction deforms less. The combined deformation of these two sides significantly reduces the volume of the energy absorption module 3, thereby improving its energy absorption effect.

[0064] like Figure 5 As shown, the arc length of the transverse section of the first receiving cavity 20 on the side Y along the impact direction of the longitudinal tension rope 2 satisfies the following relationship with the circumference of the entire first receiving cavity 20:

[0065]

[0066] Where l1 is the arc length of the transverse cross section of the first receiving cavity, r1 is the equivalent radius of the first receiving cavity or the equivalent radius of the nano-energy-absorbing module in the first receiving cavity, R1 is the critical radius of the longitudinal tension rope, which is a constant value, and λ1 is a correction coefficient, which is 2 / 3. Through the above settings, on the one hand, the deformation constraint of the longitudinal tension rope 2 on the buffer energy-absorbing module 3 is ensured; on the other hand, it is ensured that the side of the longitudinal tension rope 2 with smaller tension always faces the impact direction, preventing the longitudinal tension rope 2 from undergoing circumferential torsion along the axis during the vehicle's impact with the vehicle barrier, thus preventing a deterioration in the buffer performance of the buffer energy-absorbing module 3. Figure 6 As shown, when the longitudinal tension rope 2 is twisted, similar to the principle described above, the buffering performance of the buffer energy absorption module 3 deteriorates. In this embodiment of the invention, the value of R1 is 0.04m.

[0067] It should be noted that r1 is the equivalent radius of the first receiving cavity or the equivalent radius of the nano energy-absorbing module in the first receiving cavity. Since the nano buffer energy-absorbing module 3 is installed in the first receiving cavity 20 and the two are interference-fitted, it can be approximately considered that the equivalent radius of the first receiving cavity is the same as the equivalent radius of the nano energy-absorbing module 3 in the first receiving cavity 20. The equivalent radius is calculated by dividing twice the cross-sectional area by the perimeter.

[0068] To ensure that the tension on the side X of the longitudinal pull rope 2 facing the impact direction is less than the tension on the side Y along the impact direction, the present invention provides several implementation methods:

[0069] (1) The longitudinal tension rope 2 is made of flexible synthetic yarn on the side X facing the impact direction, and is made of metal wire on the side Y along the impact direction. Since the tensile strength of the metal wire is greater than that of the flexible synthetic yarn, it can provide less tension on the side X facing the impact direction than on the side Y along the impact direction.

[0070] Flexible synthetic filaments include, but are not limited to, high-performance materials such as ultra-high molecular weight polyethylene fiber and DuPont Kevlar fiber. When used in mining conditions, these flexible synthetic materials must meet flame-retardant and antistatic requirements, and possess characteristics such as light weight and high load-bearing capacity. Metal wires include, but are not limited to, one or more combinations of steel wire, iron wire, and copper wire.

[0071] (2) The longitudinal tension rope 2 is made of flexible synthetic yarn, and the diameter of the flexible synthetic yarn on the side facing the impact direction X is smaller than that on the side along the impact direction Y. Since the diameter of the flexible synthetic yarn on the side along the impact direction Y is larger than that on the side facing the impact direction X, even if the same material is used, because they have the same tensile strength, when the cross-sectional area of ​​the side facing the impact direction X is smaller than that of the side along the impact direction Y, the tension on the side facing the impact direction X will be less than that on the side along the impact direction Y.

[0072] (3) Alternatively, the longitudinal tension rope 2 may be constructed using flexible synthetic yarn. The flexible synthetic yarn on the side facing the impact direction (X) of the longitudinal tension rope has the same diameter as the flexible synthetic yarn on the side along the impact direction (Y). However, the tensile strength of the flexible synthetic yarn on the side facing the impact direction (X) is less than the tensile strength of the flexible synthetic yarn on the side along the impact direction (Y). By controlling the tensile strength of the flexible synthetic yarns on both sides of the longitudinal tension rope, the tension on the side facing the impact direction (X) will also be less than the tension on the side along the impact direction (Y).

[0073] The nano-energy-absorbing module 3 is formed by constraining and fixing nano-energy-absorbing spheres, specifically, as shown in... Figure 7 As shown, the nano-energy-absorbing ball 30 is cast into a mold using a polyurethane elastomer 31, and after cross-linking and curing, forms the nano-energy-absorbing module 3. The polyurethane elastomer 31 can be made from the same TPU material as the nano-energy-absorbing ball 30. Both the polyurethane elastomer 31 and the encapsulation material of the nano-energy-absorbing ball 30 are sourced from commercially available polyurethane elastomers. This design ensures strong volume constraint of the nano-energy-absorbing ball 30 after compression and limits its degrees of freedom; the two work synergistically to enhance the nano-energy-absorbing buffering effect.

[0074] Another implementation, such as Figure 8 As shown, the nano-energy-absorbing spheres 30 are covered and isolated by weaving with filaments to obtain the nano-energy-absorbing module 3. It should be noted that the filaments have high tensile strength, which can provide a space with an approximately constant volume for the nano-energy-absorbing spheres 30 and fix their positions. The combination of these two factors improves the buffering and energy absorption effect of the nano-energy-absorbing module 3.

[0075] To improve the vehicle blocking effect of the vehicle blocking net, the tension of the transverse pull rope 1 on the side facing the impact direction is less than the tension on the side along the impact direction, and its working principle is similar to that of the longitudinal pull rope 2.

[0076] A second receiving cavity is provided inside the transverse pull rope 1. The arc length of the transverse cross section of the second receiving cavity on the Y side along the impact direction of the transverse pull rope 1 satisfies the following relationship with the circumference of the entire second receiving cavity:

[0077]

[0078] Wherein, l2 is the arc length of the transverse cross section of the second receiving cavity, r2 is the equivalent diameter of the second receiving cavity or the equivalent diameter of the nano energy-absorbing module in the second receiving cavity, and R2 is the critical radius of the longitudinal pull rope, which is a certain value. In this embodiment of the invention, 0.035m is preferred.

[0079] It should be noted that r2 is the equivalent radius of the second receiving cavity or the equivalent radius of the nano energy-absorbing module in the second receiving cavity. Since the nano buffer energy-absorbing module is installed in the second receiving cavity and the two are interference-fitted, it can be approximately considered that the equivalent radius of the second receiving cavity is the same as the equivalent radius of the nano energy-absorbing module in the second receiving cavity. The equivalent radius is calculated by dividing twice the cross-sectional area by the perimeter.

[0080] like Figure 9As shown, the transverse pull rope 1 is located on the other side of the impact surface of the longitudinal pull rope 2, and the transverse pull rope 1 and the longitudinal pull rope 2 are connected as a whole by sewing along the impact direction. The sewn area is not less than the area formed by the arc length of the transverse section of the first cavity and the arc length of the transverse section of the second cavity, and does not exceed the area formed by half of the circumference of the first cavity and the circumference of the second cavity.

[0081] It should be noted that the connection point 10 between the transverse pull rope 1 and the longitudinal pull rope 2 is the most vulnerable point to damage to the entire vehicle barrier net. Furthermore, the sewing method significantly impacts the overall stability of the barrier net and the energy absorption effect of the buffer module 3. Based on these considerations, the sewing at this connection point can form a planar structure. This involves flattening the connection point between the transverse pull rope 1 and the longitudinal pull rope 2 to form a flat surface, and then sewing it together with the longitudinal pull rope along the impact direction. This three-layer sewing—the two layers formed after flattening the transverse pull rope 1 and the surface along the impact direction with the longitudinal pull rope—improves the overall stability of the vehicle barrier net.

[0082] To improve the strength of the stitching, the stitched area shall not be less than the area formed by the arc length of the transverse cross section of the first receiving cavity and the arc length of the transverse cross section of the second receiving cavity, and shall not exceed the area formed by half the perimeter of the first receiving cavity and half the perimeter of the second receiving cavity.

[0083] This invention also provides a method for preparing the above-mentioned mining nano-energy-absorbing vehicle mesh, comprising the following steps:

[0084] S1. Take a certain number of horizontal pull ropes 1 and vertical pull ropes 2, and arrange the horizontal pull ropes 1 according to a preset spacing.

[0085] like Figure 10 As shown, the four horizontal pull ropes 1 are arranged in four rows according to a preset pattern. There are four preset connection points 10 for each horizontal pull rope 1.

[0086] S2. A nano energy-absorbing module 3 of a preset size is installed in the second receiving cavity of the transverse pull rope 1.

[0087] like Figure 11 As shown, a nano energy-absorbing module 3 of a preset size is installed in the second receiving cavity of the four horizontal pull ropes 1;

[0088] S3. The transverse pull rope 1 and the longitudinal pull rope 2 are sewn together on one side along the impact direction.

[0089] like Figure 12 As shown, the horizontal pull rope 1 and the vertical pull rope 2 are sewn together on one side along the impact direction.

[0090] S4. Repeat steps S2 and S3 until the required size of the vehicle barrier mesh is produced. The morphology after step S4 is as follows: Figure 13 As shown.

[0091] S5. Insert a nano energy-absorbing module 3 of a preset size into the first receiving cavity 20 of the longitudinal pull rope 2, and then seal the end to obtain the desired result.

[0092] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0093] 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, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A nanometer energy-absorbing vehicle stopping net for mine, characterized in that, The application relates to a vehicle stopping net, which comprises the following parts: a transverse pulling rope; a longitudinal pulling rope, which is provided with a first accommodating cavity for accommodating nano energy-absorbing modules, and the first accommodating cavity wall of the longitudinal pulling rope is woven with the transverse pulling rope to form a net structure; a nano energy-absorbing module is formed by constraint fixing of a nano energy-absorbing ball; the pulling force of the side of the longitudinal pulling rope facing the impact direction is smaller than that of the side along the impact direction; the nano energy-absorbing ball adopts TPU encapsulated nano energy-absorbing material, and the nano energy-absorbing material is prepared by mixing non-wetting liquid and nano porous material; the transverse cross-section arc length of the first accommodating cavity of the side of the longitudinal pulling rope along the impact direction and the whole first accommodating cavity circumference satisfy the following relationship: ； wherein, 1 is the arc length of the transverse cross section of the first accommodating cavity, r1 is the equivalent radius of the first accommodating cavity or the equivalent radius of the nano energy-absorbing module in the first accommodating cavity, R1 is the critical radius of the longitudinal pull rope, is a correction coefficient.

2. The nanometer energy-absorbing car stopping net for mine of claim 1, wherein, the longitudinal side of the side of the longitudinal pulling rope facing the impact direction adopts flexible synthetic filaments, and the longitudinal side of the side of the longitudinal pulling rope along the impact direction adopts metal wires.

3. The nanometer energy-absorbing car stopping net for mine according to claim 1, characterized in that, the longitudinal pulling rope adopts flexible synthetic filaments, and the filament diameter of the flexible synthetic filaments of the side of the longitudinal pulling rope facing the impact direction is smaller than that of the side along the impact direction; or the longitudinal pulling rope adopts flexible synthetic filaments, the filament diameter of the flexible synthetic filaments of the side of the longitudinal pulling rope facing the impact direction is the same as that of the side along the impact direction, and the tensile strength of the flexible synthetic filaments of the side of the longitudinal pulling rope facing the impact direction is smaller than that of the side along the impact direction.

4. The nanometer energy-absorbing car stopping net for mine of claim 1, wherein, the nano energy-absorbing ball is poured in a mold by polyurethane elastomer, and the nano energy-absorbing module is formed after cross-linking and curing.

5. The nanometer energy-absorbing car stopping net for mine according to claim 1, characterized in that, the nano energy-absorbing ball is covered and isolated by means of filament weaving.

6. The nanometer energy-absorbing car stopping net for mine according to claim 1, characterized in that, the transverse pulling rope is provided with a second accommodating cavity for accommodating the nano energy-absorbing module.

7. The nanometer energy-absorbing car stopping net for mine according to claim 6, characterized in that, the pulling force of the side of the transverse pulling rope facing the impact direction is smaller than that of the side along the impact direction; the transverse cross-section arc length of the second accommodating cavity of the side of the longitudinal pulling rope along the impact direction and the whole second accommodating cavity circumference satisfy the following relationship: ； wherein, 2 is the arc length of the second accommodating cavity in the transverse section, r2 is the equivalent radius of the second accommodating cavity or the equivalent radius of the nano energy-absorbing module in the second accommodating cavity, and R2 is the critical radius of the longitudinal pull rope. the transverse pulling rope is arranged on the other side of the impact surface of the longitudinal pulling rope, and the whole transverse pulling rope is connected with the side of the longitudinal pulling rope along the impact direction by sewing and is integrated, and the area of the sewing region is not smaller than the area formed by the transverse cross-section arc length of the first accommodating cavity and the transverse cross-section arc length of the second accommodating cavity and is not more than half of the area formed by the first accommodating cavity circumference and the second accommodating cavity circumference.

8. A method for preparing the nanometer energy-absorbing vehicle stopping net for mine according to any one of claims 1-7, characterized in that, the application further discloses a vehicle stopping net manufacturing method, which comprises the following steps: S1. arranging a plurality of the transverse pulling ropes according to a preset interval; S2. loading nano energy-absorbing modules of a preset size into the second accommodating cavities of the transverse pulling ropes; S3. connecting the whole transverse pulling rope with the side of the longitudinal pulling rope along the impact direction by sewing and integrating; S4. repeating steps S2 and S3 until a vehicle stopping net of a required size is manufactured; S5. loading nano energy-absorbing modules of a preset size into the first accommodating cavities of the longitudinal pulling ropes and performing end sealing.

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