Dry ski granule, granular dry ski landing slope, and granular dry ski safety slope

Abstract

The present application relates to the technical field of artificial skiing sports facilities, and in particular to a dry ski granule, a granular dry ski landing slope, and a granular dry ski safety slope. The dry ski granules are in the shapes of polygonal prisms; the particle size of the dry ski granules is in the range of 10-14 mm, which is 3.3-3.6 times the thickness of each dry ski granule; at least one through hole is formed on the dry ski granule in the thickness direction, the angle of repose of the dry ski granules is 20-40 degrees, and the bulk density of the dry ski granules is 0.3-0.9 g / cm3. The dry ski granule of the present application can provide gliding support for skis, and also has lasting cushioning and shock-absorbing capabilities, thereby providing safety protection for the landing of ski jumpers. The dry ski granule is also used as a safety slope for obstacle apparatuses in non-skiing extreme sports, thereby providing protection for falling athletes. The granule is capable of automatically restoring the granule accumulation slope surface. The working temperature of the dry ski granule ranges from -40°C to +40°C, and thus, the dry ski granule can be used all year round without the need to spray water for gliding assistance and without water or electricity consumption, and is resistant to wind, sand, rain, snow, freezing and sun exposure.

Description

Granular dry snow, granular dry snow landing slope, granular dry snow safety slope protection Technical Field

[0001] This application relates to the field of artificial skiing facilities technology, and in particular to a granular dry snow, a granular dry snow landing slope, and a granular dry snow safety slope. Background Technology

[0002] In pursuit of flight and a cool look, people design leaps in various sports, especially skiing. Ski leaps are jumps performed by skiers using their physical abilities and ski jumps.

[0003] A ski jump consists of four parts: the acceleration ramp, the take-off ramp, the landing ramp, and the deceleration ramp.

[0004] A ski jump consists of five parts: accelerating, jumping and taking off, performing a skillful jump, landing correctly, and decelerating to the finish line.

[0005] Skiing is dangerous, expensive, inconvenient to access, has a short snow season, and low training efficiency. To improve skiing, artificial snow made of plastic has been created, called "dry skiing."

[0006] Real snow is used for skiing, and there are two types of slopes: ski runs and landing slopes.

[0007] Dry-land skiing also has two corresponding types: skiing grass mats and landing slopes. The current solution for dry-land skiing landing slopes is an "air cushion water slide." However, both real snow landing slopes and dry-land skiing landing slopes still have serious shortcomings:

[0008] First, a real snow landing slope is an icy snow landing slope with good slipperiness, but without cushioning and shock absorption, making it very dangerous and prone to accidents.

[0009] Secondly, real snow only lasts for about 120 days in winter, while the weather is warm and there is no snow in spring, summer and autumn.

[0010] Third, the "air cushion water slide" cannot provide gliding support for skis; it can only make them slide, so it is impossible to practice landing or slowing down to the finish line.

[0011] Fourth, the "air cushion water slide" solution is used on the dry snow landing slope, which is relatively safe. Water slides require continuous water spraying to aid sliding, and athletes are soaked through, feeling cold and uncomfortable. They can only be used for about 120 days in the summer.

[0012] Fifth, the water quality of water slides is difficult to guarantee. People and equipment are immersed in a damp environment for a long time, which can easily breed bacteria and is detrimental to health.

[0013] In short, none of the existing ski jump landing slopes can simultaneously meet the following requirements:

[0014] 1. Provides gliding support for skis;

[0015] 2. Provide safety guarantees for flyers;

[0016] 3. Can be used year-round, all year round. Summary of the Invention

[0017] In order for the landing slope of the ski jump to have three capabilities simultaneously:

[0018] 1. Provides gliding support for skis;

[0019] 2. Provide safety guarantees for flyers;

[0020] 3. Can be used year-round, all year round.

[0021] This application provides a granular dry snow, a granular dry snow landing slope, and a granular dry snow safety slope protection.

[0022] The primary use of granular dry snow is for constructing granular dry snow landing slopes for ski jumps.

[0023] The second use is for building safety retaining walls for ski slope obstacles or park equipment.

[0024] The third use is for constructing safety slopes for non-skiing extreme sports obstacle courses.

[0025] The following technical solution is adopted:

[0026] Firstly, a type of granular dry snow, wherein the granules are prismatic in shape, and the particle size is 3.3 to 3.6 times the thickness of the granules. This particle shape, far from spherical, allows for a controllable internal friction coefficient between the particles, enabling the particle's angle of repose to be selected between 20 and 40 degrees. The International Ski Federation (FIS) standard for ski jump landing slopes is 38 degrees, and the granular dry snow of this application meets this requirement. The primary use of the granular dry snow is for direct deposition on ski jump landing slopes. The granules have at least one through-hole along their thickness direction, increasing their air and water permeability. The prismatic shape of the particles maintains a persistent gap during deposition, providing cushioning and shock absorption, preventing the risk of suffocation when a skier enters the particles, and preventing loss during heavy rain or strong winds. This property also facilitates the washing and drying of the particles.

[0027] Gravelly dry snow provides skis with sufficient and necessary gliding support, based on the following five indicators:

[0028] 1. Glide and Speed. The material, shape, and size of the granules determine the coefficient of friction (glide) between the granules and the skis, which directly affects the skis' speed.

[0029] 2. Support buoyancy and bulk density. The bulk density of granular dry snow provides sufficient support buoyancy for skis.

[0030] 3. Cutting. The discreteness of the pimples allows skis to easily cut. Cutting is essential for choosing a line and controlling the direction of the ski.

[0031] 4. Maintain balance. Choose your gliding path carefully to maintain your balance; otherwise, you will fall and have difficulty regaining your footing.

[0032] 5. Sliding speed control.

[0033] -1. The gradient of the slide directly affects the speed.

[0034] -2. The gliding line can change the gliding slope, thus changing the gliding speed.

[0035] -3. The angle between the skis and the direction of gliding is an effective way to slow down.

[0036] Special note: Water slides only allow you to slide; you cannot choose your route, control your direction, maintain your balance, or control your speed.

[0037] The safety performance of landing slopes for dry, particulate snow is assessed based on seven indicators:

[0038] 1. Angle of Accumulation. In the unpowered fly-over landing phase, the slope of the landing slope is the primary safety indicator; the International Ski Federation (FIS) requires a standard slope of 38 degrees for the big air. The particle material and particle shape determine the coefficient of internal friction between particles, which in turn determines the particle angle of accumulation; the particle dry snow angle of accumulation (i.e., particle landing slope) can be set between 20 and 40 degrees, exceeding the FIS standard.

[0039] 2. Landing Angle of Approach. Angle of approach = angle of the parabola during landing - slope of the landing slope. The parabola angle of a big air jump is approximately 51 degrees, and the slope of the landing slope (angle of deposition) is 38 degrees. Therefore, the landing angle of a big air jump is approximately 13 degrees. This can be achieved on all three types of landing slopes: icy landing slopes on real snow jumps, water slide landing slopes, and dry pumice landing slopes. (The landing parabola angle of aerials is approximately 82 degrees, and the landing angle of approach is approximately 44 degrees, which is extremely dangerous. There have been calls to abolish aerials in skiing.)

[0040] 3. Critical buffering capacity of particle accumulation slopes. The shallow layer of particles on an accumulation slope is in a critical state between stillness and roll-off. Upon impact with a lander, it will immediately collapse and roll off. The displacement of the particles replaces the impact energy of the lander, providing cushioning and shock absorption. Particle bulk density is an important indicator.

[0041] 4. Automatic repair of particle accumulation slope. When a particle accumulation slope is damaged and collapses due to external impact, the particles above the damaged area will immediately roll down to fill the collapsed area and automatically repair the landing slope surface (particle accumulation slope) according to the particle accumulation angle.

[0042] 5. Cushioning Capacity. The shape of the particles allows them to maintain a persistent gap, giving them lasting dispersion and cushioning / damping capacity. Uncompressed snow is called powder snow. Powder snow has a one-time cushioning / damping capacity. However, once powder snow is compressed, it loses the gaps between snowflakes and ice crystals and cannot recover, thus losing its cushioning / damping capacity.

[0043] 6. Supporting Buoyancy. The bulk density of the particles is determined by the density, shape, and porosity of the granular material. The jumper's skill level and the ski jump's specifications determine the jump distance. Longer jump distances, higher-level athletes, and greater landing impact require corresponding support and cushioning capabilities from the particles. The supporting buoyancy of the particles can be adjusted by changing their bulk density.

[0044] 7. Accumulation thickness. The accumulation thickness must ensure the safety of the flyer's landing.

[0045] Optionally, the particle size of the dry snow particles is 10–14 mm.

[0046] By adopting the above technical solution, the safety of the lander's face and seven orifices can be guaranteed, and there is no fine powder in this movement space.

[0047] Optionally, the thickness of the particulate dry snow is 3.33–3.64 mm. The particle size of the particulate dry snow cannot be divided evenly by the thickness. Therefore, flattened particles cannot be closely packed with vertically arranged particles, ensuring spacing between particles and particle dispersion. Furthermore, particles of only one size are present in the same area, further ensuring particle spacing. The spacing provides buffer space, and the dispersion ensures deformation buffering during impact; both contribute to the good cushioning and shock absorption of the particulate dry snow.

[0048] Optionally, the wall thickness of the granular dry snow is 1.0–7.0 mm. An appropriate wall thickness aims to maintain the shape of the dry snow granules, preventing deformation during accumulation and transportation. A thicker wall thickness improves compressive strength and wear resistance, allowing the granular dry snow to reach its intended service life.

[0049] Optionally, the bulk density of the particulate dry snow is 0.3–0.9 g / cm³. 3 .

[0050] Optionally, the density of the particulate dry snow is 0.9–1.2 g / cm³. 3 .

[0051] The bulk density is 0.3 g / cm³. 3 Granulated dry snow, suitable for ski jumps under 6 meters; bulk density is 0.6 g / cm³. 3 The granular dry snow is suitable for ski jumps of 8m and 10m; its bulk density is 0.9g / cm³. 3 The grainy dry snow is suitable for flying over larger ski jumps.

[0052] Optionally, the material of the granular dry snow is PE polyethylene virgin plastic.

[0053] By adopting the above technical solutions, virgin PE polyethylene plastic exhibits excellent weather resistance. The working temperature of the granular dry snow pellets is between -40 and +40 degrees Celsius, allowing for year-round use. It requires no water spraying for slippery surfaces, consumes no water or electricity, and is unaffected by rain, snow, wind, sand, freezing temperatures, or direct sunlight. Its weathering lifespan is 40 years. Granular dry snow pellets are easy to maintain.

[0054] The second aspect: a granular dry snow landing slope for the construction of granular dry snow landing slopes for ski jumping events, comprising granular dry snow as described above.

[0055] Thirdly, a type of granular dry snow safety slope construction is used for building safety slopes around ski slope obstacles and park equipment. It is also used for building safety slopes around non-skiing extreme sports equipment (such as skateboarding, rollerblading, BMX, etc.) to protect athletes who fall from obstacles.

[0056] In summary, this application includes at least one of the following beneficial technical effects:

[0057] 1. The particle packing slope meets the requirements of FIS.

[0058] 2. Glide Support. The pebble dry snow landing slope provides skis with glide support: glide, support buoyancy, edge selection and stabilization of the glide line, control of glide direction, control of body balance, and control of speed.

[0059] 3. Landing Safety. Granular dry snow provides comprehensive safety for flyers' landing. The shape, size, bulk density, landing angle, spacing, and dispersion of the particles determine the durable and comprehensive safety they provide for flyers' landing. Particle shape: Granular dry snow consists of triangular or polygonal prism-shaped particles, and the particle size is 3.3 to 3.6 times its thickness. Granular dry snow within the same landing slope is of the same size.

[0060] 4. Automatic repair of particle accumulation slopes. The particles have the ability to automatically repair accumulation slopes (landing slopes).

[0061] 5. Wind and rain resistant. The perforations on the granular dry snow increase its air and water permeability. The prismatic shape of the granular dry snow maintains the gaps between the granules when it is piled up. These perforations and gaps help to cushion and absorb shock, and also prevent skiers from suffocating. The granular dry snow will not be blown away or washed away during storms and rain, and it is also easy to wash and dry.

[0062] 6. Facial safety. The particle size of the dry snow particles in this application is 10-14mm, ensuring the safety of the flyer's face and orifices.

[0063] 7. PE has strong weather resistance. Virgin polyethylene (PE) plastic has excellent weather resistance. Granular dry snow slush molding operates at temperatures between -40 and +40 degrees Celsius, allowing for year-round use. It requires no water spraying for slippery surfaces, consumes no water or electricity, and is unaffected by wind, sand, rain, snow, freezing temperatures, or direct sunlight. Its weathering lifespan is 40 years. Granular dry snow slush molding is easy to maintain.

[0064] 8. Particle-type dry snow mimics "natural powder snow," exhibiting excellent accumulation, dispersion, slipperiness, support buoyancy, and a density of 0.3–0.9 g / cm³. 3 The high bulk density of the dry snow pellets allows them to simultaneously possess gliding performance and shock absorption performance that surpasses both the shock absorption performance of a real snow jump landing slope and the gliding performance of a dry snow jump water slide landing slope.

[0065] Figure caption

[0066] Figure 1 is a schematic diagram of the structure of particulate dry snow in an embodiment of this application;

[0067] Figure 2 is a schematic diagram of a particle-based dry snow accumulation in an embodiment of this application.

[0068] Explanation of reference numerals in the attached diagram: 100, granular dry snow; 200, through hole. Detailed Implementation

[0069] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to Figures 1 and 2. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0070] This application discloses a granular dry snow 100, a granular dry snow landing slope, and a granular dry snow safety slope. Both the granular dry snow landing slope and the granular dry snow safety slope include the granular dry snow 100. The granular dry snow landing slope is used for paving various dry snow landing slopes containing ski jumps in skiing. The granular dry snow safety slope is used for paving around ski slope obstacles to protect athletes who fall from the obstacles. It is also used for constructing safety slopes for obstacles in non-skiing extreme sports such as skateboarding, rollerblading, and BMX. The innovation of this application lies in the granular dry snow 100, which will be described in detail below.

[0071] Referring to Figure 1, the granular dry snow 100 is in the shape of a multi-faceted prism, which can be a triangular prism, square prism, pentagonal prism, hexagonal prism, heptagonal prism, octagonal prism, etc. The granular dry snow 100 has at least one through hole 200 along its thickness direction. The number of through holes 200 can be one, two, three, four, five, six, etc. The shape of the through holes 200 is not limited; multiple through holes 200 can have the same shape and size, or they can be different.

[0072] The thickness of the granular dry snow 100 is smaller than its particle size. Specifically, the particle size of the granular dry snow 100 is 3.3 to 3.6 times its thickness. In this embodiment, the particle size is 3.5 times its thickness. This particle shape, which deviates from a spherical shape, allows for a controllable coefficient of friction between the particles. By fine-tuning the particle shape, the controllable internal friction coefficient and "angle of repose" between the particles can be set. During the initial manufacturing of the granular dry snow 100, the "internal friction coefficient" of the particles can be adjusted through the design of the particle shape and material. The "internal friction coefficient" determines the "angle of repose" of the granular dry snow 100. The "angle of repose" is precisely the slope of the ski jump landing slope created by the granular dry snow 100. To construct the ski landing slope, the "angle of repose" of the granular dry snow 100 is set between 20 and 40 degrees (see Figure 2). A 38-degree slope is the standard for a real snow landing slope set by the International Ski Federation (FIS).

[0073] A real snow landing slope is an icy, hard landing slope with no cushioning, so the steeper the slope, the safer it is. A powder-based dry snow landing slope, however, has inherent cushioning and shock-absorbing properties, allowing for a gentler slope. Preferably, the "angle of deposition" of the powder-based dry snow 100 is set between 30 and 38 degrees. In this embodiment, the angle of deposition is 34 degrees, ensuring skier safety. The powder-based dry snow 100 provides skis with a similar "glide" and supporting buoyancy to real snow powder, and also provides support for edge-carving, allowing skiers to choose their gliding lines, maintain balance, control direction, and manage speed.

[0074] The Particle Alpine 100 is multi-faceted and prismatic, which maintains the gaps between the particles, preserving their discrete state and cushioning capabilities. The thickness of the Particle Alpine 100 can be adjusted according to the difficulty of the jump, especially when the jumper attempts a difficult new maneuver, the particle thickness can be selected between 20 and 100 cm.

[0075] The angle of packing is a critical angle; when no external force is applied, the particles pack stably, but when an external force is applied, they immediately roll off and collapse. This property is used to address both successful and failed landing scenarios.

[0076] 1. Upon successful landing, the skis face the landing slope, and the skier uses their own muscles and bones to absorb shock and cushion the impact. The skis carry the skier down the slope quickly and smoothly, and the dry snow particles remain intact and will not roll or collapse.

[0077] 2. When a skater makes a landing error, they lose balance, and their own bones and muscles are unable to provide cushioning. The pumice, which is in a critical state, rolls and collapses upon impact with the skater. The skater then crashes into the pumice in dry snow and gains cushioning. At the same time, the skis also cut into the pumice in an edged position, gaining cushioning as well.

[0078] Natural particles cannot achieve an angle of repose of 38 degrees, nor do they have a single size of 12 mm and good slip properties. The particles in this application have a shape with a good internal friction coefficient, and the material of the particles is PE polyethylene, which also has good slip properties.

[0079] The through-holes 200 on the granular dry snow pellets 100 and the gaps between the pellets together provide air and water permeability between the pellets, preventing the risk of suffocation when a lander crawls into the pellets. During strong winds and heavy rains, the permeability of the granular dry snow pellets 100 prevents the pellets from being blown away or washed away by the wind and rain; the permeability also facilitates the cleaning and drying of the pellets.

[0080] The particle size of the dry snow pellets 100 is 10-14 mm, designed to ensure the safety of the rider's facial orifices. Particles that are too large will affect the gliding experience. Particles that are too small will cause dust to disrupt the gliding environment. The thickness of the dry snow pellets 100 is 3.33-3.64 mm. In this embodiment, the particle size of the dry snow pellets 100 is 12 mm, and the thickness is 3.5 mm, which is much larger than the ice crystals in real snow.

[0081] The particulate dry snow in this application, with its single-sized triangular or polygonal prism-shaped particles and a particle diameter three times its thickness, provides a durable separation capability between particles, thus enabling the particulate dry snow to have a durable cushioning and shock absorption capability.

[0082] The wall thickness of the granular dry ski 100 is 1.0–7.0 mm. In this embodiment, the wall thickness of the granular dry ski 100 is 1 mm. The granular dry ski 100 has the following properties: 1. A controllable internal friction coefficient allows the granule angle of accumulation to be between 20 and 40 degrees; 2. It maintains a persistent gap and dispersion of the granules, thereby maintaining good cushioning and shock absorption; 3. It maintains good slipability, buoyancy support, and easy edge cutting, providing gliding support for skis.

[0083] Granular Dry Snow 100 is made of virgin polyethylene (PE) plastic. PE has strong weather resistance and is unaffected by wind, sand, rain, snow, freezing temperatures, or direct sunlight. The material density of Granular Dry Snow 100 is 0.9–1.2 g / cm³. 3 In this embodiment, the density of the PE material is 0.95 g / cm³. 3 It has a density less than water, so it floats on the surface of the water during washing, making it easy to clean. The material can also be other plastics, such as PP, PA, POM, PVC, ABS, etc.

[0084] The granules have single or multiple pores to facilitate setting the porosity before granulation. The porosity directly determines the bulk density of the granules. The bulk density of granular dry snow is 0.3–0.9 g / cm³. 3 The bulk density determines the cushioning and shock absorption capacity of the particles. The lighter the particles, the better the cushioning; the heavier the particles, the better the buoyancy support. By pre-adjusting the porosity of the multiple pores on the particles, the bulk density of the dry snow particles can be set, for example, the following three: 0.3, 0.6, and 0.9 g / cm³. 3 Among them, 0.3 g / cm 3 Optimal buffering, 0.9g / cm³ 3 It would be best to support it.

[0085] Granular dry snow 100 can be used all year round, without the need for water spraying to aid gliding, and is not afraid of rain, snow, wind, sand, freezing, or sun exposure.

[0086] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0087] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0088] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A type of particulate dry snow, characterized in that, The granular dry snow (100) is prismatic in shape, and the particle size of the granular dry snow (100) is 3.3 to 3.6 times the thickness of the granular dry snow (100). The granular dry snow (100) is provided with at least one through hole (200) along the thickness direction.

2. The particulate dry snow (100) according to claim 1, characterized in that, The particle size of the dry snow (100) is 10-14 mm.

3. The particulate dry snow according to claim 2, characterized in that, The thickness of the particulate dry snow (100) is 3.33–3.64 mm.

4. The particulate dry snow according to claim 3, characterized in that, The particle size of the dry snow particles (100) cannot be divided by the thickness of the dry snow particles (100).

5. The particulate dry snow according to claim 1, characterized in that, The wall thickness of the granular dry snow (100) is 1.0 to 7.0 mm.

6. The particulate dry snow according to claim 1, characterized in that, The bulk density of the particulate dry snow (100) is 0.3–0.9 g / cm³. 3 .

7. The particulate dry snow according to claim 1, characterized in that, The density of the granular dry snow (100) is 0.9–1.2 g / cm³. 3 .

8. The particulate dry snow according to claim 7, characterized in that, The material of the granular dry snow (100) is PE polyethylene virgin material.

9. A granular dry snow landing slope, used for paving dry snow ski jump landing slopes in skiing, characterized in that, Including the particulate dry snow (100) as described in any one of claims 1 to 8.

10. A granular dry snow safety slope protection, used for the accumulation of safety slope protection around skiing slope obstacles, and also for the accumulation of safety slope protection for other non-skiing extreme sports obstacles, characterized in that, Including the particulate dry snow (100) as described in any one of claims 1 to 8.

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