Granular dry snow, granular dry snow landing slope and granular dry snow safety protection slope
By using polyprism-shaped granular dry snow, the problem of ski jumping landing slopes cannot provide glide support, safety guarantees and continuous use in all seasons is solved, and the glide and landing effect is achieved throughout the year, safe and reliable.
Patent Information
- Application Number
- CN202510044332.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-11
- Publication Date
- 2025-04-15
AI Technical Summary
The existing ski jump landing slopes cannot meet the needs of providing ski support, providing safety guarantees for surfers, and year-round use and all seasons.
The prism-shaped grained snow is used, with a particle size of 3.3~3.6 times its thickness, with a controllable internal friction coefficient and accumulation angle, which can be selected between 20~40 degrees, meeting the standards of the International Snow Federation FIS. Through holes are installed on the granular dry snow to increase breathability and water permeability, and provide buffering and shock absorption.
It provides sufficient ski support for snowboards, ensures the safety of overpass landing, and can be used year-round, without the need for water squirting, long weather-resistant life, suitable for all kinds of skiing and extreme sports.
Smart Images
Figure CN119818931A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of artificial skiing facilities, and in particular to a kind of granular dry snow, a granular dry snow landing slope, and a granular dry snow safety slope protection. Background Art
[0002] In order to fly and show off, people try to design flying jumps in various sports, especially skiing. Ski flying is a flying jump performed by the jumper with the help of his own physical strength and ski jumping platform.
[0003] A ski jump consists of four parts: an acceleration chute, a take-off platform, a landing slope and a deceleration area.
[0004] The ski flying action consists of five separate actions: accelerating and sliding, taking off, flying stunts, landing correctly, and sliding and decelerating to the finish line.
[0005] Skiing is dangerous, expensive, inconvenient, has a short snow season, and low training efficiency. In order to ski, people made fake snow out of plastic, named it: dry snow.
[0006] Real snow is used for skiing, and there are two types of slopes: running slopes and landing slopes.
[0007] There are two corresponding types of dry snow: sliding grass mats and landing slopes. The current solution for dry snow landing slopes is "air cushion water slides". So far, real snow landing slopes and dry snow landing slopes still have serious shortcomings: 1. The real snow landing slope is an ice-like snow landing slope with good slipperiness, but no cushioning and shock absorption. It is very dangerous and accidents occur frequently.
[0008] 2. Real snow only occurs in winter for about 120 days, while the weather is warm and snowless in spring, summer and autumn.
[0009] 3. The "air cushion water slide" cannot provide sliding support for the skis, and can only slide, so it is impossible to practice landing or practicing sliding and decelerating to the end.
[0010] 4. The dry snow landing slope adopts the "air cushion water slide" solution, which is relatively safe. The water slide requires continuous water spraying to help the slide, and the athletes are soaked and cold, so it can only be used for about 120 days in the summer.
[0011] 5. The water quality of water slides is difficult to guarantee. The human body and equipment are immersed in a humid environment for a long time, which is easy to breed bacteria and harmful to health.
[0012] In summary, existing ski jumping platform landing slopes cannot simultaneously meet the following requirements: 1. Provide sliding support for the skis; 2. Provide safety for flyers; 3. Use all year round, all seasons. Summary of the invention
[0013] In order to allow the ski jump landing slope to have three capabilities at the same time: 1. Provide sliding support for the skis; 2. Provide safety for flyers; 3. Use all year round, all seasons.
[0014] The present application provides granular dry snow, a granular dry snow landing slope, and a granular dry snow safety slope protection.
[0015] The first use of granular snow was in the construction of granular snow landing slopes for ski jumps.
[0016] The second use is the safe slope protection of ski slope obstacles or park props.
[0017] The third use is the safe slope protection construction of non-skiing extreme sports obstacle props.
[0018] The following technical solutions are adopted: The first aspect: a granular dry snow, the granular dry snow is in a polygonal prism shape, the particle size of the granular dry snow is 3.3 to 3.6 times the thickness of the granular dry snow, this particle shape is far from a sphere, so that there is a controllable internal friction coefficient between the particles, and this indicator allows the accumulation angle of the particles to be selected between 20 and 40 degrees. The standard of the International Ski Federation FIS ski landing slope is 38 degrees, and the accumulation angle of the granular dry snow of the present application can meet the requirement of 38 degrees. The first use of the granular dry snow is to directly accumulate the landing slope of the ski jump. The granular dry snow is provided with at least one through hole along the thickness direction, and the presence of the through hole on the granular dry snow increases the air permeability and water permeability of the dry snow. The granular prism-shaped particles can maintain a lasting gap when stacked, these gaps provide buffering and shock absorption, and can also avoid the risk of suffocation when the flyer drills into the particles, and at the same time, the granular dry snow will not be lost when encountering heavy rain and strong winds, and this performance is also convenient for the cleaning and drying of the particles.
[0019] Granular dry snow can provide sufficient and necessary sliding support for the snowboard, which is reflected in the following 5 indicators: 1. Slippage and sliding speed. The material, shape and size of the particles determine the friction coefficient (slippage) between the particles and the skis, which directly affects the sliding speed of the skis; 2. Support buoyancy and stacking density. The stacking density of granular dry snow can provide sufficient support buoyancy for the skis.
[0020] 3. Edge carving. The discreteness of the particles allows the ski to be easily edged. Edge carving is a necessary condition for selecting the sliding line and controlling the sliding direction; 4. Maintain body balance. Use the sliding route to maintain body balance; otherwise, you will fall and it will be difficult to stand up again.
[0021] 5. Sliding speed control.
[0022] -1. The sliding slope directly affects the sliding speed.
[0023] -2. The sliding route can change the sliding slope and thus change the sliding speed.
[0024] -3. The angle between the skis and the sliding direction is an effective way to slow down.
[0025] Special note: You can only slide on the water slide. You cannot choose the sliding route, control the sliding direction, control the balance of the body's center of gravity, or control the sliding speed.
[0026] There are seven indicators for the safety performance of the granular dry snow landing slope: 1. Accumulation angle. In the unpowered overflight landing phase, the slope of the landing slope is the first safety indicator; the International Ski Federation (FIS) requires the standard slope of the big jump to be 38 degrees. The particle material and particle shape determine the internal friction coefficient between particles, which in turn determines the particle accumulation angle; the particle dry snow accumulation angle (i.e. the particle landing slope) can be set between 20 and 40 degrees, which exceeds the FIS standard.
[0027] 1. Landing cut-in angle. Cut-in angle = the angle of the parabola when landing - the slope of the landing slope. The parabola angle of the big jump jumper is about 51 degrees, and the slope of the landing slope (grain accumulation angle) is 38 degrees. Therefore, the landing cut-in angle of the big jump is about 13 degrees. Three types of landing slopes: whether it is a real snow jump ice snow landing slope, a water slide landing slope or a granular dry snow landing slope can achieve this degree. (The landing parabola angle of aerial skills is about 82 degrees, and the landing cut-in angle is about 44 degrees, which is very dangerous. There have been calls for the abolition of the "aerial skills" project in skiing.) 2. Critical buffering capacity of the particle accumulation slope. The particles in the shallow layer of the accumulation slope are in a critical state of stillness and rolling down. When impacted by a lander, they will collapse and roll down immediately. The impact energy of the lander is replaced by the displacement of the particles, providing a buffer for the lander. The accumulation density of the particles is an important indicator.
[0028] 3. Particles automatically repair the accumulation slope. When the particle accumulation slope is damaged and collapsed by external force, the particles above the damaged part will immediately roll down to fill the collapsed part and automatically repair the landing slope (particle accumulation slope) according to the particle accumulation angle.
[0029] 4. Buffering capacity. The shape of the particles allows the gaps between the particles to be maintained permanently, which makes the particles have lasting discreteness and buffering and shock absorbing capabilities. Real snow is called powder snow before it is squeezed. Powder snow has a one-time buffering and shock absorbing capacity. However, after the powder snow is squeezed, the gaps between the snowflakes and ice crystals will be lost and cannot be restored, so it will lose its buffering and shock absorbing capacity.
[0030] 5. Support buoyancy. The packing density of the particles is determined by the density and shape of the particle material and the porosity of the through holes on the particles. The level of the jumper and the specifications of the ski jump determine the length of the flying distance. The longer the flying distance, the higher the level of the athlete and the greater the impact of the landing, the more the support and buffering capacity of the particles are required to match. By adjusting the packing density of the particles, the support buoyancy of the particles can be adjusted.
[0031] 6. Deposits thickness: Deposits thickness must ensure safe landing for flyovers.
[0032] Optionally, the particle size of the granular dry snow is 10-14 mm.
[0033] By adopting the above technical solution, the safety of the seven orifices of the lander's face can be guaranteed, and there is no fine powder in this movement space.
[0034] Optionally, the thickness of the granular dry snow is 3.33-3.64 mm. The particle size of the granular dry snow cannot be divided by the thickness of the granular dry snow. Therefore, the flatly arranged particles cannot be closely arranged with the vertically arranged particles, which ensures the gaps between the particles and the discreteness of the particles. In addition, the particles in the same field have only one specification size, which also ensures the gaps between the particles. The gaps ensure the buffer space, and the discreteness ensures the deformation buffering when impacted, and both ensure the good buffering and shock absorption of the granular dry snow.
[0035] Optionally, the wall thickness of the dry snow particles is 1.0-7.0 mm. The purpose of the appropriate wall thickness is to maintain the shape of the dry snow particles so that they do not deform during stacking and transportation. The thickest thickness can improve the pressure resistance and wear resistance, so that the dry snow particles can reach the set service life.
[0036] Optionally, the bulk density of the dry snow particles is 0.3-0.9 g / cm 3 .
[0037] Optionally, the material density of the granular dry snow is 0.9-1.2 g / cm 3 .
[0038] Bulk density is 0.3g / cm 3 Granular dry snow, suitable for ski jumping platforms below 6m; bulk density is 0.6g / cm 3 Granular dry snow, suitable for flying over 8m and 10m ski jumping platforms; the bulk density is 0.9g / cm 3 Granular dry snow, suitable for flying over larger ski jumps.
[0039] Optionally, the granular dry snow is PE polyethylene virgin plastic.
[0040] By adopting the above technical solution, PE polyethylene virgin plastic has good weather resistance, and the working temperature of granular dry snow is between -40 and +40 degrees Celsius. It can be used all year round, without water spraying to help sliding, no water and electricity consumption, and is not afraid of rain, snow, wind and sand, freezing and exposure. The weather resistance life is 40 years. Granular dry snow is easy to maintain.
[0041] The second aspect: a granular dry snow landing slope, used for the construction of a granular dry snow landing slope for a ski jumping project, comprising the granular dry snow as described above.
[0042] The third aspect: a kind of granular dry snow safety slope protection is used for the construction of safety slope protection around ski slope obstacles and park props. It is also used for the construction of safety slope protection around non-skiing extreme sports props (such as skateboards, roller skating, BMX, etc.) to protect athletes who fall from obstacle props.
[0043] In summary, the present application includes at least one of the following beneficial technical effects: 1. The particle accumulation slope can meet the requirements of FIS.
[0044] 2. Glide support. The granular dry snow landing slope provides slide support for the snowboard: sliding degree, supporting buoyancy, cutting edge selection and stabilizing the slide line, controlling the slide direction, controlling the body balance, and controlling the slide speed.
[0045] 3. Landing safety. Granular dry snow provides all-round safety guarantee for flyers’ landing. Granular shape, particle size, stacking density, landing cut-in angle, particle gap, and particle discreteness determine that the granules provide long-lasting and all-round safety guarantee for flyers’ landing. Granular shape: Granular dry snow has triangular or multi-prism-shaped particles, and the particle size is 3.3 to 3.6 times its thickness. Granular dry snow on the same landing slope is of the same size.
[0046] 4. Automatically repair the particle accumulation slope. Particles have the ability to automatically repair the accumulation slope (landing slope).
[0047] 5. Wind and rainstorm resistance. The through holes on the dry snow particles increase the air permeability and water permeability of the dry snow particles. The multi-prism-shaped dry snow particles can maintain the gaps between the particles for a long time when they are piled up. These through holes and gaps help to buffer and reduce shock, and can also avoid the risk of suffocation for skiers. In storms, the dry snow particles will not be blown away, washed away, and are also easy to clean and dry.
[0048] 6. Face safety. The particle size of the granular dry snow in this application is 10-14 mm, which makes the face and seven orifices of the flyer safe.
[0049] 7. PE has strong weather resistance. PE polyethylene virgin plastic has good weather resistance. The working temperature of granular dry snow is between -40 and +40 degrees Celsius. It can be used all year round. It does not require water spraying to help sliding, does not consume water and electricity, and is not afraid of wind, sand, rain, snow, freezing and exposure. The weather resistance life is 40 years. Granular dry snow is easy to maintain.
[0050] 8. Granular dry snow imitates "natural powder snow", with good accumulation, dispersion, sliding, support buoyancy and 0.3~0.9g / cm 3 The stacking density makes the granular dry snow have both sliding performance and cushioning and shock absorption performance, which surpasses the cushioning and shock absorption of the real snow platform landing slope and the sliding performance of the dry snow platform water slide landing slope respectively.
[0051] Figure Description Figure 1 This is a schematic diagram of the structure of the granular dry snow in the embodiment of the present application; Figure 2 It is a schematic diagram of the accumulation of granular dry snow in an embodiment of the present application.
[0052] Description of reference numerals: 100, granular dry snow; 200, through hole. DETAILED DESCRIPTION
[0053] The following will be combined with the attached Figure 1~2 , the technical solutions in the embodiments of the present application are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.
[0054] The embodiment of the present application discloses a granular dry snow 100, a granular dry snow landing slope and a granular dry snow safety slope protection. The granular dry snow landing slope and the granular dry snow safety slope protection both 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 protection is used for paving around obstacle props on ski slopes to protect athletes who fall from obstacle props. It is also used for the safety slope protection of obstacle props for skateboards, roller skating, and BMX in non-skiing extreme sports. The innovation of the present application lies in the granular dry snow 100, which is described in detail below.
[0055] Reference Figure 1The granular dry snow 100 is in the shape of a polygonal prism, which may be a triangular prism, a quadrangular prism, a pentagonal prism, a hexagonal prism, a heptagonal prism, an octagonal prism, etc. The granular dry snow 100 is provided with at least one through hole 200 along the thickness direction, and the number of the through holes 200 may be one, two, three, four, five, six, etc. The shape of the through hole 200 is not limited, and the shapes and sizes of the multiple through holes 200 may be the same or different.
[0056] The thickness of the granular dry snow 100 is smaller than the particle size of the granular dry snow 100. Specifically, the particle size of the granular dry snow 100 is 3.3 to 3.6 times the thickness of the granular dry snow 100. In the present embodiment, the particle size of the granular dry snow 100 is 3.5 times the thickness of the granular dry snow 100. This particle shape is far from a sphere, so that there is a controllable friction coefficient between the particles. By fine-tuning the shape of the particles, the controllable internal friction coefficient and "stack angle" between the particles can be set. At the beginning of the manufacture of the granular dry snow 100, the "internal friction coefficient" of the particles can be adjusted by designing the particle shape and material. The "internal friction coefficient" determines the "stack angle" of the granular dry snow 100. The "stack angle" is exactly the slope of the landing slope of the ski jump platform of the granular dry snow 100. In order to build a ski landing slope, the "stack angle" of the granular dry snow 100 is set between 20 and 40 degrees (refer to Figure 2 ). Among them, the 38-degree slope is the standard of the International Ski Federation (FIS) real snow landing slope.
[0057] The real snow landing slope is an ice-like snow landing slope, which is hard and has no buffering safety, so the steeper the slope, the safer it is. The granular dry snow landing slope itself has buffering and shock-absorbing performance, so the granular landing slope can be gentler. Preferably, the "deposition angle" of the granular dry snow 100 is set between 30 and 38 degrees. In this embodiment, the accumulation angle of the granular dry snow 100 is 34 degrees, which can ensure the safety of the skier. The granular dry snow 100 provides the ski board with a "slipperiness" and supporting buoyancy similar to that of real snow powder snow, and also provides support for edge sliding, so that the skier can choose the sliding route, control the body balance, control the sliding direction and control the sliding speed.
[0058] The dry snow 100 particles are in a multi-prism shape, which permanently maintains the gaps between the particles, and the gaps also permanently maintain the discrete state of the particles and the buffering and shock-absorbing capabilities. The accumulation thickness of the dry snow 100 particles can be adjusted at any time according to the difficulty of flying, especially when the flyer tries a difficult new move, the accumulation thickness of the particles can be selected between 20 and 100 cm.
[0059] The particle stacking angle is a critical angle. When there is no external force, the particles will stack stably. When there is an external force, they will immediately roll down and collapse. This performance is used to deal with the two states of landing success or failure: 1. When the landing is successful, the snowboard is facing the landing slope, and the rider uses his own muscles and bones to absorb shock. The snowboard carries the rider down the slope quickly and smoothly, and the granular dry snow remains intact and will not roll down or collapse.
[0060] 2. When the landing fails, the skater loses balance and his own bones and muscles cannot provide cushioning and shock absorption. The critical particles encounter the impact of the skater and then roll down and collapse. The skater hits the particles and obtains cushioning and shock absorption. At the same time, the snowboard also cuts into the particles with an edge state, obtaining cushioning and shock absorption.
[0061] The stacking angle of natural particles cannot reach 38 degrees, nor does it have a single size of 12 mm and good slip. The shape of the particles in this application has a good internal friction coefficient, and the material of the particles is PE polyethylene, which has good slip.
[0062] The through holes 200 on the dry snow granules 100 and the gaps between the dry snow granules 100 provide air and water permeability between the granules, thereby preventing the risk of suffocation caused by the lander drilling into the granules. In strong winds and heavy rains, the permeability of the dry snow granules 100 prevents the granules from being blown away by the wind and rain; the permeability also facilitates the cleaning and drying of the granules.
[0063] The particle size of the granular dry snow 100 is 10-14 mm, and the purpose is to ensure the safety of the seven orifices of the face of the flyer. If the particle size is too large, it will affect the sliding feeling. If the particles are too small, the dust will destroy the sports environment. The thickness of the granular dry snow 100 is 3.33-3.64 mm. In this embodiment, the particle size of the granular dry snow 100 is 12 mm, and the thickness of the granular dry snow 100 is 3.5 mm, which is much larger than the ice crystals of real snow.
[0064] The granular dry snow in the present application has triangular or multi-prism-shaped particles of a single size, and the particle diameter of the particles is three times its thickness, so that the particles have a lasting discrete ability, and the granular dry snow has a lasting buffering and shock-absorbing ability.
[0065] The wall thickness of the granular dry snow 100 is 1.0-7.0 mm. In this embodiment, the wall thickness of the granular dry snow 100 is 1 mm. The granular dry snow 100 has the following properties: 1. The controllable internal friction coefficient makes the particle stacking angle at a slope of 20-40 degrees; 2. Maintaining a lasting gap and a lasting discrete state of the particles, thereby maintaining good cushioning and shock absorption; 3. Maintaining good sliding, buoyancy support, and easy edge carving, providing sliding support for the snowboard; Granular dry snow 100 is made of PE polyethylene virgin plastic. PE has strong weather resistance and is not afraid of wind, sand, rain, snow, freezing or exposure. The material density of granular dry snow 100 is 0.9~1.2g / cm 3 In this embodiment, the density of PE material is 0.95g / cm 3The density is less than that of water, so it will float on the water surface when washing, which is convenient for cleaning. The material can also be other plastics, such as: PP, PA, POM, PVC, ABS, etc.
[0066] The particles are provided with a single hole or multiple holes in order to conveniently set the porosity of the particles before manufacturing. The porosity of the particles directly determines the bulk density of the particles. The bulk density of the granular dry snow is 0.3~0.9g / cm 3 The packing density determines the cushioning and shock absorption ability of the particles. The lighter the particles, the better the cushioning; the heavier the particles, the better the support buoyancy. By pre-adjusting the porosity of the multi-holes on the particles, the packing density of the granular dry snow can be set, such as the following three types: 0.3, 0.6, 0.9g / cm 3 Among them, 0.3g / cm 3 Best cushioning, 0.9g / cm 3 Best support.
[0067] Granular dry snow 100 can be used all year round, no need to spray water to aid sliding, no fear of rain, snow, wind, sand, freezing or exposure to the sun.
[0068] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0069] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying 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 application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.
[0070] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A granular dry snow, characterized in that: The granular dry snow (100) is in a polygonal column shape, the particle size of the granular dry snow (100) is 3.3 to 3.6 times the thickness of the granular dry snow (100), and the granular dry snow (100) is provided with at least one through hole (200) along the thickness direction.
2. The dry snow granules (100) according to claim 1, characterized in that: The particle size of the granular dry snow (100) is 10-14 mm.
3. The dry snow granules according to claim 2, characterized in that: The thickness of the granular dry snow (100) is 3.33-3.64 mm.
4. The dry snow granules according to claim 3, characterized in that: The particle size value of the granular dry snow (100) cannot be divided evenly by the thickness value of the granular dry snow (100).
5. The dry snow granules according to claim 1, characterized in that: The wall thickness of the granular dry snow (100) is 1.0-7.0 mm.
6. The dry snow granules according to claim 1, characterized in that: The bulk density of the granular dry snow (100) is 0.3-0.9 g / cm 3 .
7. The dry snow granules according to claim 1, characterized in that: The material density of the granular dry snow (100) is 0.9-1.2 g / cm 3 .
8. The dry snow granules according to claim 7, characterized in that: The granular dry snow (100) is made of PE polyethylene raw material.
9. A granular dry snow landing slope, used for paving the landing slope of a dry snow ski jump in skiing, characterized in that: The invention comprises the granular dry snow (100) as claimed 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 obstacle props, and also used for the accumulation of safety slope protection around other non-skiing extreme sports obstacle props, characterized in that: The invention comprises the granular dry snow (100) as claimed in any one of claims 1 to 8.