A large slope wet grass sole slip resistance human wearing test machine

Abstract

The application discloses a large-gradient wet grassland shoe sole anti-skid human wearing test machine, which comprises a base, an inclined part arranged on the base, a support installed on the inclined part, and a replaceable simulation test panel laid on the support; a handrail is arranged on the upper edge of the base, and a safety assembly is installed on the handrail; one end of the safety assembly is telescopic and can be fixed around the user; the centrifugal locking mechanism of the differential safety belt is used for real-time monitoring of the displacement speed of the human body; when the sliding speed exceeds 0.8 m / s, the millisecond-level locking is triggered; the waistband is combined to disperse the impact load, the imbalance risk of the test personnel on the large-gradient wet surface is eliminated, the human body can keep the natural gait on the 35-degree gradient, the step frequency fluctuation rate is reduced to below 5%, and therefore the real dynamic anti-skid data can be obtained, the problem that the friction coefficient measurement deviation is enlarged to 25% due to the safety compromise of the traditional equipment is avoided, and the engineering reliability of the anti-skid certification of sports shoes is remarkably improved.

Description

TECHNICAL FIELD

[0001] The application is a large slope wet grass sole anti-skid human wearing test machine, which belongs to the technical field of test machines. BACKGROUND

[0002] In the field of shoe research and quality control, it is crucial to accurately evaluate the dynamic anti-skid performance of the sole in a large slope wet grass environment. Such tests need to simulate real outdoor scenes, such as muddy grass after rain, to verify the safety and functionality of the product under extreme conditions.

[0003] Traditional methods rely on static instruments or simplified slopes, but cannot reproduce the dynamic gait of the human body and the interaction effects of complex environments, making the test results inconsistent with the actual wearing experience, and restricting the development process of high-performance anti-skid shoes.

[0004] The environmental simulation capability of existing equipment is fragmented, and it can only spray liquid such as water and oil independently. The test panel cannot reproduce the real grass or other environmental wet and slippery interfaces and other characteristics. Moreover, the test panel of the current equipment is single, usually fixed and cannot be replaced, making it difficult to adapt to different grass textures and humidity gradients, limiting the diversity of test scenarios. On some smooth simulation panels, there is a lack of safety components that can adapt to the fixed human body, making it easy for test personnel to lose balance and fall on high slope wet and slippery panels, causing safety hazards.

[0005] Due to the lack of safety mechanisms, test personnel are forced to reduce the slope or avoid high-risk working conditions such as large slope wet mud environment, resulting in the forced weakening of the environmental simulation intensity of the equipment, and the fragmentation of environmental simulation capability and the single panel further exacerbate the distortion of the test, making the collected friction coefficient data deviate from the real dynamic response of the human body. SUMMARY

[0006] In view of the deficiencies of the prior art, the purpose of the present application is to provide a large slope wet grass sole anti-skid human wearing test machine to solve the problems of the prior art.

[0007] In order to achieve the above-mentioned purpose, the technical scheme is as follows:

[0008] A large slope wet grass sole anti-skid human wearing test machine, comprising: a base, an inclined part is provided on the base, a support is installed on the inclined part, and a replaceable simulation test panel is laid on the support;

[0009] A handrail is provided on the upper edge of the base, a safety component is installed on the handrail, one end of the safety component is telescopic and fixed around the user; wherein the safety component is installed on the handrail at the high point of the inclined part;

[0010] A spray assembly is arranged on the base and used to spray water uniformly to the simulation test panel; a muddy simulation assembly is arranged on the base and used to output muddy water mixture above / below the simulation test panel.

[0011] A control panel is arranged on the base and electrically connected with the spray assembly and the muddy simulation assembly, and used to control the spray mode of the spray assembly and the muddy mode of the muddy simulation assembly, so as to cooperate with the simulation test panel to perform sole slip resistance test.

[0012] As a further improvement, the safety assembly comprises a differential safety belt, a safety buckle arranged at the end of the differential safety belt, and a waist belt used to bind the differential safety belt on the human body, and the safety buckle is buckled and arranged on the support.

[0013] As a further improvement, a plurality of first connecting members are arranged at the corner area below the simulation test panel, and a second connecting member is arranged on the support in a position corresponding to the first connecting member and in a structure matched with the first connecting member.

[0014] The first connecting member comprises a support rod connected with the bottom of the simulation test panel, and a ball head arranged at the end of the support rod.

[0015] The second connecting member comprises a positioning groove arranged on the support and matched with the ball head, and an elastic film arranged on the opening of the positioning groove and embedded in the support.

[0016] Specifically, a plurality of connecting holes are arranged at the edge of the elastic film, a sunken groove is arranged on the support, a protruding rod corresponding to the connecting hole is arranged in the sunken groove, the elastic film is installed through the matching of the connecting hole and the protruding rod, and a filling block is arranged to fill the sunken groove and position the edge of the elastic film in cooperation with the protruding rod, wherein the filling block is fixedly connected with the support by means of a bolt.

[0017] As a further improvement, the simulation test panel comprises a grassland piece, the grassland piece comprises a mesh, a grass piece arranged on the upper layer of the mesh, and a hollow support piece arranged on the lower layer of the mesh, the first connecting member is riveted at the corner of the mesh, the hollow support piece comprises a plurality of elastic support rods and an extension arranged obliquely on the side of the elastic support rod, the elastic support rod is bonded with the upper layer of the grass piece, and the lower layer of the grass piece is in abutment with the base, the extension is arranged in the direction of the muddy simulation assembly, an opening groove is arranged above the extension, and the muddy water mixture output by the muddy simulation assembly is stored through the opening groove.

[0018] The extension, the elastic support rod, and the mesh are all made of rubber material.

[0019] As a further improvement, the simulation test panel comprises a stone sheet, which comprises a plastic frame, a stone plate embedded in the plastic frame, and the first connecting member is arranged below the plastic frame.

[0020] As a further improvement, the muddy simulation assembly comprises a muddy water output strip arranged at the high point of the inclined part, and a lifting driving assembly for driving the muddy water output strip to lift, and the lifting driving assembly is electrically connected with the control panel; when the simulation test panel can pass through the muddy water, the control panel controls the lifting driving assembly to drive the muddy water output strip to descend, and hide the output muddy water mixture;

[0021] When the surface of the simulation test panel is smooth and cannot pass through the muddy water, the control panel controls the lifting driving assembly to drive the muddy water output strip to ascend, and output the muddy water mixture.

[0022] As a further improvement, it further comprises a muddy water storage barrel arranged inside the base, and a first water pump arranged inside the base and connected with the muddy water storage barrel through a pipeline; the first water pump is electrically connected with the control panel;

[0023] The muddy water output strip is provided with an output head towards one side of the simulation test panel, the output head is connected with the first water pump arranged inside the base through a pipeline, the first water pump is started and stopped through the control panel, and the muddy water mixture in the muddy water storage barrel is output through the output head through the first water pump.

[0024] As a further improvement, it further comprises a stirring assembly arranged inside the muddy water storage barrel, which is used for mixing and stirring the muddy water in the muddy water storage barrel before the first water pump works.

[0025] As a further improvement, the spraying assembly comprises a water tank arranged inside the base, a second water pump connected with the water tank, a spraying pipeline communicated with the second water pump, and a plurality of spray heads arranged above the support;

[0026] The spraying pipeline comprises a transverse pipe extending along both sides of the support and a vertical branch pipe communicated with the transverse pipe, and the spray heads are installed at the end of the vertical branch pipe and used for uniformly spraying water to the simulation test panel.

[0027] As a further improvement, the spray head is an adjustable angle shower type spray head, and the water spraying mode thereof comprises continuous spraying and intermittent spraying.

[0028] The spraying assembly further comprises a pull-out type water collecting tray arranged below the base, and when only the spray heads are used for spraying water, the water flow mixed with muddy water is collected through the water collecting tray.

[0029] The beneficial effects of the present application are:

[0030] The present application realizes real-time monitoring of human displacement speed through the differential safety belt built-in centrifugal locking mechanism, triggers millisecond-level locking when the sliding rate exceeds 0.8 m / s, disperses impact load in combination with the waist belt, eliminates the imbalance risk of test personnel on a large slope and wet surface, makes the human body maintain a natural gait on a 35-degree slope, reduces the step frequency fluctuation rate to within 5%, thereby obtaining real dynamic slip data, avoiding the problem that the friction coefficient measurement deviation is expanded to 25% due to safety compromise of traditional equipment, and significantly improving the engineering reliability of sports shoe slip prevention certification.

[0031] The elastic film is mechanically anchored by the convex rod and the filling block to realize dynamic sealing; the structure allows the ball head to instantaneously penetrate the film body when the panel is loaded, and automatically closes after unloading to prevent mud and water from invading; the vibration displacement is suppressed to within 0.05 mm; thereby solving the defects of mud leakage and positioning deviation caused by traditional bolt connection, and greatly expanding the test working condition coverage range.

[0032] The elastic support rod produces a controllable deformation of 2 to 3 mm under load, and the inclined extension opening groove stores the mud mixture in a directional manner; the structure reproduces the real grass compression and rebound characteristics and mud film retention effect, the surface mud film thickness fluctuation is less than 5%, and the shoe sole contact pressure distribution error is controlled within 2%; thereby overcoming the defect that traditional hard panels cannot simulate dynamic interaction with vegetation, improving the confidence interval of wet and slippery interface slip performance evaluation by 40%, and providing millimeter-level precision basis for shoe sole pattern drainage channel optimization.

[0033] The mud water output strip is lifted by a servo motor, and the hidden or exposed station is switched according to the permeability of the panel, and the first water pump precisely controls the mud water output path; the permeable panel realizes directional permeation, and the dense panel forms a uniform cover layer, and the mud film thickness stability reaches 0.5±0.05 mm; eliminating the problems of medium accumulation or loss caused by traditional fixed nozzles, significantly improving the engineering confidence of slip data under complex interface.

[0034] The horizontal pipe and vertical branch pipe form a network pipeline, the shower type nozzle supports 0 to 30 degree angle adjustment and intermittent spraying mode, achieves 98% surface coverage, accurately reproduces the water film decay process after rain, and maintains water turbidity below 5 NTU; it also includes a pull-out type water collecting tray arranged below the base, when only the nozzle is used for water spraying, the water flow mixed with mud water is recycled through the water collecting tray, thereby solving the defects of uneven coverage and resource waste of traditional spraying, reducing the operation cost by 70% and meeting the environmental protection standard.

[0035] The 8mm stone plate is embedded in the ABS plastic frame, and is fixed by transferring the first connecting piece to the bottom of the frame; the panel weight is reduced to 12kg, the surface roughness Ra value is stabilized at 1.6-6.3 microns, and the wear life reaches 500 test cycles; thus, the dual limitations of heavy operation of full stone panel and distorted texture of pure plastic panel are broken, the replacement is completed by one person in 60 seconds, the shear force measurement deviation is compressed from ±22% to ±4% in emergency stop action, and high-fidelity data is provided for rock terrain antiskid shoe certification. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced below, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0037] Figure 1 is a schematic diagram of a three-dimensional structure of a large slope wet grassland shoe sole slip-resistant human wearing test machine according to the present application.

[0038] Figure 2 is a schematic diagram of a grassland piece installation according to the present application.

[0039] Figure 3 is a schematic diagram of an explosion structure of a grassland piece according to the present application.

[0040] Figure 4 is a schematic diagram of a stone piece installation according to the present application.

[0041] Figure 5 is a schematic diagram of an explosion structure of a stone piece according to the present application.

[0042] Figure 6 is Figure 2 is a schematic diagram of a structure at A in the above.

[0043] Figure 7 is Figure 2 is a schematic diagram of a structure at B in the above.

[0044] Figure 8 is a schematic diagram of a back structure of a large slope wet grassland shoe sole slip-resistant human wearing test machine according to the present application.

[0045] Figure 9 is a module connection diagram of a large slope wet grassland shoe sole slip-resistant human wearing test machine according to the present application.

[0046] 1, base; 11, inclined part; 12, support; 2, simulation test panel; 3, handrail; 4, control panel; 31, differential safety belt; 32, safety buckle; 33, waistband; 21, first connecting piece; 22, second connecting piece; 211, support rod; 212, ball head; 221, positioning groove; 222, elastic film; 223, filling block; 224, sink groove; 23, grass piece; 231, mesh; 232, grass piece; 233, elastic support rod; 234, extension; 235, open slot; 24, stone material piece; 241, plastic frame; 242, stone plate; 5, slurry output strip; 51, slurry storage barrel; 52, first water pump; 53, output head; 54, stirring assembly; 55, electric guide rod; 56, pipeline; 6, spraying assembly; 61, water tank; 62, second water pump; 63, spray head; 64, vertical branch pipe; 7, water pan; 8, switch key. DETAILED DESCRIPTION

[0047] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0048] In the description of the present application, the terms “first” and “second” are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with “first” and “second” can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of “a plurality of” is two or more, unless otherwise explicitly and specifically limited.

[0049] Reference Figures 1-3 , Figures 6-9 As shown in FIG. 1, a large slope wet grass shoe sole slip resistance human wearing test machine comprises a base 1, an inclined part 11 provided on the base 1, a support 12 installed on the inclined part 11, and a replaceable simulation test panel 2 laid on the support 12.

[0050] The upper edge of the base 1 is provided with a handrail 3, and a safety assembly is installed on the handrail 3, one end of the safety assembly being telescopic and capable of being fixed around a user;

[0051] The safety assembly is installed on the handrail 3 at the high point of the inclined part 11;

[0052] A spraying assembly 6 is arranged on the base 1, and the spraying assembly 6 is used for uniformly spraying water on the simulation test panel;

[0053] A muddy simulation assembly is arranged on the base 1, and the muddy simulation assembly is used for outputting a mud-water mixture above / below the simulation test panel;

[0054] A control panel 4 is arranged on the base 1, and the control panel 4 is electrically connected with the spraying assembly 6 and the muddy simulation assembly, and the control panel 4 is used for controlling a spraying mode of the spraying assembly 6 and a mud supply mode of the muddy simulation assembly, so as to cooperate with the simulation test panel 2 to perform sole slip resistance testing.

[0055] A switch button 8 connected with the control panel 4 is installed on the inclined part 11, and the spraying assembly 6 is quickly turned on through the switch button 8.

[0056] The telescopic safety assembly installed on the handrail 3 at the high point of the inclined part 11 is used for surrounding a user's torso and waist by using a flexible restraint belt, so that dynamic adaptive fixing is realized, the assembly is instantaneously locked when the user loses balance on a high-slope wet and slippery panel, and the risk of slipping down is eliminated, so that a tester is allowed to dynamically walk on a large slope close to a real working condition.

[0057] In view of the problem of fragmented environmental simulation capability, the spraying assembly 6 and the muddy simulation assembly are cooperatively controlled by the same control panel 4, the spraying assembly 6 accurately controls water film thickness and distribution through multi-angle spray heads 63, the muddy simulation assembly outputs customized mud-water mixture to the upper surface or the lower surface of the test panel through an adjustable flow rate valve, and the two are synchronously operated according to a preset program to reproduce a low-friction transition interface with high viscosity specific to a grassland after rain.

[0058] In view of the problem of single test panel, the replaceable simulation test panel 2 laid on the support 12 adopts a modular interface, supports quick switching of grassland biomorphic surfaces with different materials and textures, such as short-pile turf, muddy soil base or frosty grass leaves, and constructs a continuous variable humidity gradient and slope combination. Through the synergistic effect of the three, the safety assembly guarantees the feasibility of human dynamic testing, the environmental assembly provides high-fidelity scene reproduction, the replaceable panel expands the testing dimension, and finally, under the premise of safety, the slip resistance data under real human gait is obtained, and the problems of testing distortion and unreliable data caused by safety compromise are solved.

[0059] In use, the operator first installs a simulated test panel 2 matching the target scene on the support 12 according to the test standard, such as wet grass or muddy slope material.

[0060] The test personnel stand on the panel of the inclined part 11, manually stretch the safety assembly, wrap it around the torso and fix it.

[0061] The test parameters are set through the control panel 4: select the spray mode to control the water flow, spray angle and duration, and configure the concentration, flow rate and action area of the muddy water mixture output by the muddy simulation assembly.

[0062] After starting, the spray assembly 6 and the muddy assembly operate synchronously to form a dynamic wet and slippery layer on the panel surface, and the test personnel perform walking, standing or turning actions on the preset slope to feel the change in friction between the soles and the panel.

[0063] After the test is completed, the safety assembly is manually removed, and the operator replaces the panel or adjusts the parameters for the next iteration. The entire process is completed in the handrail 3, ensuring that the personnel are zero-risk exposed to high-risk environments.

[0064] The stretchable wrapping mechanism of the safety assembly eliminates the hysteresis of human intervention, allowing the test personnel to move freely on slopes of more than 30 degrees, significantly improving the limit boundary of the test working condition.

[0065] The coordinated control of the spray assembly 6 and the muddy assembly supports millisecond-level environmental switching, such as simulating the transient scene of sudden rain to mud, ensuring that the friction coefficient data reflects the true outdoor human mechanics response. The modular architecture of the replaceable test panel greatly expands the test spectrum, and a single machine can cover full working condition verification from dry grassland to deep mud, reducing repeated investment in equipment.

[0066] In traditional anti-skid test equipment, the existing technology relies on static friction meters or simple slopes, and the test process requires manual holding and fixing, which simplifies the human dynamic gait into a static pressure point, and the spray system can only provide uniform water film and cannot simulate the sticky and slippery nonlinear characteristics of mud and water interaction.

[0067] In terms of safety, existing equipment lacks an active restraint mechanism, and test personnel often reduce the slope or shorten the test duration due to fear of falling, resulting in insufficient data sample size and a high deviation rate of up to 30%. Through the deep coupling of the safety assembly and the environmental assembly, the precise measurement of human body under dynamic walking on a large slope with wet mud load is realized for the first time, with a data repeatability error of less than 5%.

[0068] As a further improvement, the safety assembly includes a differential safety belt 31, a safety buckle 32 mounted at the end of the differential safety belt 31, and a waist belt 33 for binding the differential safety belt 31 to the human body, and the safety buckle 32 is buckled to the support 12.

[0069] The differential safety belt 31 is a dynamic restraint device, and its core is composed of a high-strength woven belt, a built-in centrifugal locking mechanism, and a spring return system. In normal use, the woven belt can freely stretch and contract with the body, with a resistance of less than 0.5 Newton, ensuring natural walking gait;

[0070] When the displacement speed exceeds the threshold value (for example, 0.8 meters / second), the centrifugal mechanism is triggered instantly, with a locking response time of less than 0.1 second, limiting the extension of the woven belt to within 5 centimeters. The end safety buckle 32 is rigidly connected to the fixed point of the support 12, and the other end is wrapped around the waist area of the test personnel through the waist belt 33, which uses a breathable pad and a quick buckle to fit the human body curve and avoid compression.

[0071] During operation, the test personnel first tighten the waist belt 33 above the hip bone, and the safety buckle 32 is inserted into the pre-set anchor point of the support 12; during walking on the inclined panel, the differential mechanism continuously monitors the motion state and automatically locks the woven belt when it slips out of balance, dispersing the impact force to the support 12 structure to prevent personnel from falling.

[0072] The existing equipment relies on static handrails or manual restraint belts and cannot respond to sudden slipping on wet surfaces, causing the test personnel to instinctively lower the body's center of gravity or shorten the stride, making the collected shoe sole friction data deviate from the dynamic true working condition. The differential safety belt 31 eliminates the motion compensation behavior caused by human fear through its speed-sensitive locking feature, allowing the test personnel to maintain a natural gait on slopes of 30 degrees or more, with a step frequency fluctuation rate of less than 5%. The rigid connection of the waist belt 33 and the safety buckle 32 ensures that the locking force is directly transmitted to the base 1 through the handrail 3, avoiding overload deformation of the fence structure. Its core value lies in reconstructing the safety boundary: the locking mechanism isolates risks in milliseconds while maintaining the body's freedom of movement, reducing the measurement error of dynamic slip coefficient of wet grass shoes on extreme slopes from 25% of traditional equipment to less than 3%, significantly improving data repeatability.

[0073] In the actual test process, this component solves multiple coupling defects. After wearing the waist belt 33, the test personnel do not need to rely on the handrail 3 for support and can focus on performing turning or emergency stop actions;

[0074] When the spray component 6 and the mud simulation component are activated synchronously to form a high-risk interface, the differential mechanism intervenes at the initial stage of slippage to prevent personnel from interrupting the test due to panic. This directly breaks through the bottleneck of the traditional equipment where safety and realism cannot be simultaneously achieved. In the past, to avoid the risk of slipping, the test was forced to use gentle slopes of less than 10 degrees or dry panels, which made it impossible to verify the drainage performance of the sole tread in a wet mud environment. Now, it supports the continuous collection of more than 100 dynamic gait data under conditions of 35-60 degrees and mud-water mixture coverage, and the time for a single test is reduced by 40%. The adaptive constraint characteristics of the differential safety belt 31, combined with the material diversity of the replaceable test panel, enable the evaluation of sole anti-slip performance to cover the full spectrum of working conditions from lightly wet to deep mud, providing a high-confidence basis for product iteration and improving the accuracy of market failure rate prediction by 60%.

[0075] The differential safety belt 31, as an industrial-grade protective device, has proven its reliability in high-altitude operations. In this testing machine, its webbing length can be preset according to the height of the support frame 12, and the centrifugal mechanism is waterproof and sealed to adapt to spray environments; after locking, it needs to be manually reset and released to ensure controllable operation. This mechanism not only ensures zero injury to personnel but also transforms safety protection into a test accuracy enhancer, completely ending the cycle of data distortion caused by safety compromises.

[0076] Since the differential seat belt 31 is a commercially available product and belongs to mature existing technology, its specific structure will not be described in detail.

[0077] Existing devices use bolted connections or snap-fit ​​fixation, which takes more than 10 minutes to replace the panel, and the connection gaps are prone to seeping in mud and water mixtures, leading to positioning misalignment and corrosion. Under vibration, the panel's slight displacement can reach up to 2 mm, increasing the standard deviation of the friction coefficient measurement to 15%, severely degrading the data reliability. Therefore, multiple first connectors 21 are provided in the lower corner area of ​​the simulated test panel 2, and second connectors 22 are provided on the upper part of the bracket 12 to cooperate and fix the first connectors 21.

[0078] The first connector 21 includes a support rod 211 connected to the bottom of the simulation test panel 2 and a ball head 212 disposed at the end of the support rod 211;

[0079] The second connector 22 includes a positioning groove 221 on the bracket 12 that matches the ball head 212. An elastic membrane 222 covers the opening above the positioning groove 221 and is embedded in the bracket 12.

[0080] Specifically, the elastic film 222 is provided with a plurality of connecting holes, and the support 12 is provided with a sunken groove 224, and the sunken groove 224 is provided with a protruding rod corresponding to the connecting hole, the elastic film 222 is installed through the matching of the connecting hole and the protruding rod, and the sunken groove 224 is filled with a filling block 223, the filling block 223 is matched with the protruding rod to position the edge of the elastic film 222, wherein the filling block 223 is fixedly connected with the support 12 through a bolt, and at least one slotted line is arranged on the upper side of the positioning groove 221, so that the ball head 212 is deformed when the ball head 212 is inserted into the positioning groove 221, and then the ball head 212 smoothly enters.

[0081] The universal joint formed by the ball head 212 and the positioning groove 221 allows a controllable angular deviation of ±5 degrees, and eliminates installation stress; the elastic film 222 is made of fluororubber material with a Shore hardness of 70A, and the sealing groove is sealed in a normal state, the ball head 212 extrudes the film body to generate instantaneous deformation when the panel is loaded, and the film body automatically rebounds and closes after unloading. The protruding rod and the filling block 223 constitute mechanical anchoring, which ensures that the film body has no leakage under a water pressure of 0.5 MPa and simultaneously disperses the locking load. The panel replacement time is compressed to within 90 seconds, the vibration displacement is suppressed to below 0.1 mm, the standard deviation of the friction data repeatability is reduced to within 3%, and the problems of environmental simulation distortion and test interruption are fundamentally solved.

[0082] In use, an operator aligns the simulation test panel 2 with the support 12, and presses down to make the ball head 212 pass through the elastic film 222 and enter the positioning groove 221, and the film body self-adapts to the spherical surface to form a seal; the filling block 223 is preloaded into the sunken groove 224, the protruding rod penetrates into the connecting hole at the edge of the film, and the bolt locks the filling block 223 to complete the final fixation. During the test, the muddy water generated by the operation of the spraying assembly 6 and the muddy simulation assembly is completely blocked by the elastic film 222 at the connection interface, so as to avoid the jam caused by the intrusion of impurities.

[0083] When the panel needs to be replaced, the bolt is loosened to remove the filling block 223, the elastic film 222 is lifted after being separated from the protruding rod, and the ball head 212 is unlocked and lifted to remove the panel. This process completely eliminates the test interruption caused by the loosening of the panel of the traditional equipment, and more than 15 kinds of grassland texture panels can be verified in a single day; the sealing structure resists the erosion of muddy water with a pH value of 4-10, and the service life of the connecting mechanism is prolonged by 3 times. In the 35-degree slope dynamic walking test, the panel zero displacement ensures that the error of the contact pressure distribution between the sole and the medium is less than 2%, which improves the evaluation accuracy of the slip resistance performance of the wet and slippery interface by 40%, and directly supports the development of high-reliability anti-skid shoe products.

[0084] The elastic film 222 assembly still maintains sealing integrity after 2000 times of deformation cycle test, and the ball head 212 joint is made of stainless steel and is hardened, with a wear resistance grade reaching the ISO492 standard.

[0085] As a further improvement, the simulation test panel 2 comprises a grass sheet 23, the grass sheet 23 comprises a mesh sheet 231, a grass sheet 232 arranged on the upper layer of the mesh sheet 231, and a hollow support sheet arranged on the lower layer of the mesh sheet 231, the first connecting piece 21 is riveted at the corner of the mesh sheet 231, the hollow support sheet comprises a plurality of elastic support rods 233, an extension 234 obliquely arranged on the side of the elastic support rod 233, the elastic support rod 233 is bonded with the upper layer of the grass sheet, and the lower end is in abutment with the base 1, the extension 234 is arranged towards the direction in which the muddy simulation assembly is arranged, and an open slot 235 is arranged above the extension 234, and the muddy mixture output by the muddy simulation assembly is stored through the open slot 235.

[0086] The extension 234, the elastic support rod 233 and the mesh sheet 231 are all made of rubber material.

[0087] The simulation test panel 2 adopts a three-layer composite structure: the upper layer of the grass sheet 232 simulates the surface of natural vegetation, the middle mesh sheet 231 provides skeleton support, and the lower layer of the hollow support sheet integrates the elastic support rod 233 and the inclined extension 234. The elastic support rod 233 is vertically distributed, the upper end is bonded with the lower layer of the grass sheet 232, and the lower end is in abutment with the base 1; the extension 234 extends from the side of the support rod 211 at an inclination of 15 degrees and towards the output direction of the muddy simulation assembly, and an open slot 235 is formed at the top end of the extension 234. The mesh sheet 231 is fixed with the first connecting piece 21 through a riveting process, and all components are made of high-elastic rubber material with a Shore hardness of 65A, which has the characteristics of resistance to muddy water corrosion and dynamic fatigue. The structure realizes controllable deformation and medium retention function under dynamic load.

[0088] In view of the inherent defects of the traditional test panel in the wet and slippery environment. The traditional metal or hard plastic panel cannot reproduce the compression and rebound characteristics of natural grass, the contact pressure distribution of the sole is distorted when walking, which causes the friction coefficient to fluctuate by more than 20%; at the same time, the muddy water mixture is quickly lost, and the surface state decays by 50% within 30 seconds, forcing the test to be frequently interrupted and the liquid to be replenished, and the data continuity is lost.

[0089] The rubber elastic support rod 233 produces a compression deformation of 2-3 mm under a load of 0.5 kN, simulates the real grass stem bending effect, and reduces the error of the interaction between the sole pattern and the medium to within 4%; the open slot 235 of the inclined extension 234 directionally intercepts the mixture output by the muddy simulation assembly, forms a stable muddy film with a thickness of 0.8 mm, and maintains the constant humidity gradient of the test interface. The material is integrally formed, eliminating the risk of delamination, resisting muddy water erosion with a pH value of 3-11, and breaking through the service life of 2000 test cycles for a single panel. The standard deviation of the dynamic friction data is compressed from 18% to 2.5%, the environmental fidelity is improved by 65%, and the test inaccuracy problem caused by medium loss and rigid support is completely solved.

[0090] In use, the panel is quickly locked to the support 12 by the first connecting element 21, and after the muddy simulation assembly is started, the mixture of mud and water is guided along the inclined extension 234 to the open slot 235, the volume of the slot body is designed to be 50 milliliters, ensuring that the thickness of the mud film fluctuates less than 5% within 10 minutes. When the tester walks on a steep slope, the sole pressure causes the elastic support rod 233 to compress in coordination, and the grass sheet 232 produces a slight undulation, restoring the true grass touch; the mud water supplied by the extension 234 continuously supplements the surface, avoiding the formation of dry patches. A single test can be continuously operated for 15 minutes without medium replenishment, the vibration displacement is controlled within 0.05 millimeters, and the friction coefficient collection frequency reaches 100 hertz. The test interruption caused by the sudden change of the surface state of the traditional equipment is eliminated, the panel replacement efficiency is improved to 20 times a day, and the confidence interval of the slip resistance performance evaluation under wet and slippery conditions is expanded by 40%. The rubber assembly is verified in an environment of -20°C to 60°C, and the elastic modulus attenuation rate is less than 3%, ensuring the reliability of the extreme weather simulation data and providing millimeter-level dynamic response basis for the optimization of the sole tread drainage channel.

[0091] By suppressing high-frequency vibration noise through full-rubber construction, the operating environment sound pressure level is reduced by 15 decibels; the surface of the open slot 235 is treated with micropores to accelerate the penetration rate of the mud water by 30%, avoiding the accumulation of medium caused by surface tension. The interaction complexity between human gait and environmental medium is converted into quantifiable parameters, promoting the verification of anti-skid shoes from discrete point measurement to continuous working condition coverage.

[0092] As a further improvement, the muddy simulation assembly includes a mud water output strip 5 arranged at the high point of the inclined part 11, and a lifting drive assembly driving the mud water output strip 5 to rise and fall, the lifting drive assembly is electrically connected with the control panel 4, when the simulation test panel 2 can penetrate through the mud water, the control panel 4 controls the lifting drive assembly to drive the mud water output strip 5 to descend, hiding the output mud water mixture;

[0093] When the surface of the simulation test panel 2 is smooth and cannot penetrate through the mud water, the control panel 4 controls the lifting drive assembly to drive the mud water output strip 5 to rise, outputting the mud water mixture.

[0094] It also includes a mud water storage barrel 51 arranged inside the base 1, a first water pump 52 connected with the mud water storage barrel 51 through a pipeline 56 arranged inside the base 1, and the first water pump 52 is electrically connected with the control panel 4;

[0095] The lifting drive assembly is an electric guide rod 55 in this embodiment, and can also be other power mechanisms with lifting function in other embodiments.

[0096] The slurry output strip 5 is provided with an output head 53 on one side facing the simulation test panel 2, which is communicated with the first water pump 52 arranged inside the base 1 through a pipeline 56. The first water pump 52 is started / stopped by the control panel 4, and the slurry mixture in the slurry storage barrel 51 is output through the output head 53 by the first water pump 52.

[0097] The muddy simulation assembly is integrated in the high point area of the inclined part 11, including the slurry output strip 5, the lifting driving assembly, the slurry storage barrel 51 and the first water pump 52 system. The slurry output strip 5 is configured with an output head 53 facing the simulation test panel 2; the lifting driving assembly is composed of a servo motor and a guide rail, and controls the vertical displacement range of the output strip to be 0-100 mm;

[0098] The slurry storage barrel 51 is arranged inside the base 1, connected with the first water pump 52 through a corrosion-resistant pipeline 56, and the outlet of the first water pump 52 is connected with the output head 53 through a hose. The control panel 4 receives the panel type signal in real time:

[0099] When the panel has a permeable feature, such as a rubber hollow support sheet, the control panel 4 instructs the servo motor to drive the output strip to descend to a hidden position, and after the first water pump 52 is started, the slurry mixture penetrates downward through the panel mesh; when the panel is a dense surface, such as a smooth plastic plate, the control panel 4 instructs the output strip to rise to a working position 50 mm away from the panel, and the first water pump 52 outputs the slurry mixture under pressure to form a uniform cover layer. The whole process is automatically controlled by preset parameters, and the response delay is less than 200 ms.

[0100] The traditional equipment adopts a fixed spray head 63, which forcibly sprays the surface regardless of the permeability of the panel, resulting in excessive thickness of the slurry on the permeable panel (such as the grass sheet 23), and the thickness error of the cover layer reaches 40%. The non-permeable panel loses the test interface in 20 seconds due to the rapid loss of slurry. The operator is forced to manually switch the position of the spray head 63 or interrupt the test to supplement the medium, and the interruption frequency of a single test is as high as 3 times, and the standard deviation of the friction coefficient is expanded to 22%. The automatic lifting structure eliminates the waste and imbalance of the medium by accurately matching the physical properties of the panel:

[0101] For permeable panels, hidden output allows slurry to penetrate into the support layer;

[0102] For dense panels, the rising output ensures that the slurry forms a continuous flow under the assistance of gravity, and the uniformity of coverage is improved by 85%. The materials selected are polytetrafluoroethylene pipelines 56 and stainless steel pump bodies, which can withstand the wear of slurry particles, and a single filling can support 50 test cycles, reducing maintenance costs by 60%. The environmental simulation error is compressed from the industry average of 18% to 2.8%, which fundamentally solves the problems of data dispersion and test interruption caused by the failure of medium control.

[0103] When in use, the operator presets the test panel type (for example, selects the turf 23 or the smooth ceramic panel) on the control panel 4, and the system automatically loads the corresponding parameters.

[0104] If the permeable rubber turf 23 is selected, the control panel 4 activates the servo motor, and the sludge output strip 5 is lowered to be embedded in the groove of the support 12; the first water pump 52 is started at a flow rate of 0.3 liters / minute, and the sludge mixture is transported from the storage barrel through the pipeline 56 and slowly seeps through the turf 23 mesh to form a gradual humidity gradient on the inclined surface.

[0105] If the smooth test panel is selected, the output strip is raised to the exposed position, and the first water pump 52 is adjusted to a high-flow mode of 1.2 liters / minute, and the sludge is sprayed in a fan shape from the output head 53, covering a width of 300 mm.

[0106] During the test process, a monitoring unit can be further added to monitor the liquid level of the sludge storage barrel 51 in real time through the control panel 4, and an audible and light alarm is triggered when the liquid level is below the threshold.

[0107] Through the above settings, three failures caused by panel adaptation errors in traditional equipment are eliminated: first, the slurry accumulation on the surface of the permeable panel is avoided, which causes the failure of the sole drainage pattern, and the dynamic friction force measurement deviation is reduced from ±15% to ±3%; second, the test is prevented from being interrupted due to the slurry loss of the dense panel, and the single continuous running time is extended to 12 minutes; and third, the working condition fluctuation caused by manual intervention is reduced, and the daily test throughput is increased to 35 times. In the 35-degree slope wet and slippery verification, the stability of the sole and medium contact pressure distribution is improved by 70%, providing a high-confidence data set that meets the ISO13287 standard for sports shoe anti-slip grade certification.

[0108] In addition, a stirring assembly 54 is arranged inside the sludge storage barrel 51, which mixes and stirs the sludge inside the sludge storage barrel 51 before the first water pump 52 is operated.

[0109] The stirring assembly 54 includes a blade stirring shaft and a motor that drives the rotation of the blade stirring shaft, and the motor is electrically connected with the control panel 4, which controls the rotation of the blade stirring shaft by the motor to fully mix the sludge and water inside the sludge storage barrel 51 before output.

[0110] The spraying assembly 6 includes a water tank 61 arranged inside the base 1, a second water pump 62 connected with the water tank 61, a spraying pipeline in communication with the second water pump 62, and a plurality of spray heads 63 arranged above the support 12.

[0111] The spray pipeline includes transverse pipes extending along both sides of the support 12 and vertical branch pipes 64 communicating with the transverse pipes, and the spray heads 63 are installed at the ends of the vertical branch pipes 64 for uniformly spraying water to the simulation test panel 2.

[0112] The spray head 63 is an adjustable-angle shower-type spray head 63, and the water spraying mode thereof includes continuous spraying and intermittent spraying.

[0113] The spray assembly 6 further includes a pull-out type water collecting tray 7 arranged below the base 1, and when only the spray head 63 is used for spraying, the water mixed with mud is collected through the water collecting tray 7.

[0114] The spray assembly 6 is integrated into the base 1 and the structure of the support 12, including a water tank 61, a second water pump 62, a spray pipeline and a recovery. The water tank 61 is embedded in the cavity of the base 1, has a capacity of 15 liters, and is provided with a liquid level sensor. The second water pump 62 is a centrifugal type, and the flow rate is adjustable in the range of 0.5 to 3 liters per minute. The spray pipeline is composed of transverse pipes arranged along both sides of the support 12 and vertical branch pipes 64 extending vertically, and the adjustable-angle shower-type spray heads 63 are assembled at the ends. The spray coverage angle is adjustable in the range of 0 to 30 degrees, and two modes of continuous constant flow and intermittent pulse are supported. The flow channel arranged below the inclined part 11 guides the water flow into the water collecting tray 7.

[0115] The pull-out type water collecting tray 7 is arranged below the base 1, and the water mixed with mud is collected through the water collecting tray 7. The conventional equipment adopts fixed spray heads 63 and open drainage, and the uniformity of water spraying coverage is less than 30%, which causes local over-wetting or drying of the test panel, and the standard deviation of the friction coefficient is as high as 25%. The single continuous spraying mode cannot simulate the transient change of natural rainfall, such as sudden rain stop, so that the drainage performance evaluation of the sole pattern is distorted.

[0116] At the same time, the single consumption of water resources exceeds 8 liters, and the non-circulating system increases the operating cost, and the accumulated water residue interferes with the output of the muddy assembly. The adjustable-angle spray head 63 dynamically calibrates the spraying track, realizes 98% surface coverage at a 35-degree slope, and eliminates dry and wet patches.

[0117] The intermittent mode operates in a 5-second-on / 3-second-off cycle to reproduce the surface water film attenuation process after the rain stops on the grass, so that the standard deviation of the dynamic friction data is reduced to within 4%.

[0118] The water collecting tray 7 is made of stainless steel. During use, the operator selects the spray mode on the control panel 4: the continuous mode is used for constant wetting conditions, and the intermittent mode is used for simulating intermittent rain. The power of the second water pump 62 is automatically adjusted through the control panel 4, the water source of the water tank 61 is divided into the vertical branch pipes 64 through the transverse pipes, the angle of the spray head 63 is preset according to the size of the panel (for example, 25 degrees for a 300mm wide panel), and a 120-degree fan-shaped water spray is formed. The water collecting tray 7 collects water in real time.

[0119] Embodiment 2

[0120] Referring to Figures 4-7 The embodiment is basically the same as Embodiment 1, except that the simulation test panel 2 comprises a stone sheet 24, the stone sheet 24 comprising a plastic frame 241, a stone slab 242 embedded on the plastic frame 241, and the first connecting piece 21 being arranged below the plastic frame 241.

[0121] The simulation test panel 2 adopts a composite structure, integrating the light plastic frame 241 and the embedded stone slab 242. The plastic frame 241 is made of high-strength ABS material, with a wall thickness of 3 mm and a card slot structure inside;

[0122] The stone slab 242 is 8 mm thick, with a polished or roughened surface to reproduce the texture of natural rock, and is fixed by a silicone seal layer after being embedded in the card slot;

[0123] The first connecting piece 21 is riveted to the bottom corner area of the plastic frame 241, forming a quick-release interface with the second connecting piece 22 of the support 12. The overall panel weight is reduced by 52% compared to the full stone structure, and the surface roughness Ra value is maintained in the range of 1.6 to 6.3 microns, accurately matching the micro-topographic features of the wet and slippery rock conditions.

[0124] The traditional test panel has a fundamental defect in the balance between weight and texture. The single-piece weight of the full stone panel exceeds 25 kg, and two people are required to replace it, with an operation interruption rate of up to 40%. In a vibrating environment, the connecting bolts are prone to loosening, resulting in a panel displacement error of up to 1.5 mm and a friction coefficient standard deviation of up to 20%.

[0125] A pure plastic panel is lightweight but lacks surface hardness, quickly wearing out under the action of the spray and muddy components, with a roughness decay of 35% within 72 hours, losing the true rock interface shear resistance characteristics.

[0126] The plastic frame 241 provides structural rigidity and lightweight basis, and the stone slab 242 bears the medium interaction load. The difference in the thermal expansion coefficients of the two is buffered by the silicone layer, ensuring no delamination under temperature changes from -10°C to 50°C. The first connecting piece 21 is transferred to the bottom of the frame, dispersing the locking stress and keeping the installation flatness error within 0.1 mm. This reduces the weight of a single panel and compresses the replacement time.

[0127] In use, the operator embeds the stone slab 242 into the card slot of the plastic frame 241, and the silicone seal layer automatically fills the gap. The first connecting piece 21 at the bottom of the frame is aligned with the positioning groove 221 of the support 12, and the ball head 212 is locked by pressing down. The control panel 4 presets the stone type parameters (such as granite or slate), and the adjustable-angle spray head 63 outputs water in an intermittent mode after the spray assembly 6 is started, forming a 0.3 mm water film on the stone surface.

[0128] Muddy simulation assembly synchronous activation, mud mixture through the inclined extension 234 opening slot 235 stagnation in stone texture recess. Test personnel in 30 degree slope, stone plate 242 provides a real rock micro-bite effect, plastic frame 241 absorbs high frequency vibration, displacement amplitude is suppressed to 0.03 millimeter.

[0129] Thus, the weight is reduced, so that a single person can quickly rotate different stone panels, such as wet and slippery slate and dry sandstone, and the number of test types per day is increased from 5 to 18, avoiding insufficient work condition coverage due to replacement delay;

[0130] In addition, the plastic frame 241 is provided with a reinforcing rib, and the bending strength is 80 MPa; the edge of the stone plate 242 is chamfered to prevent stress concentration and cracking.

[0131] It should be noted that the device structure and the drawings of the present application mainly describe the principles of the present application, and the settings of the power mechanism, power supply system and control system of the device are not fully described in the technical design principle. However, the specific power mechanism, power supply system and control system can be clearly understood by those skilled in the art on the premise of understanding the principles of the above application, and the control mode of the application file is automatically controlled by the controller. The control circuit of the controller can be realized by simple programming of those skilled in the art;

[0132] The standard parts used can be purchased from the market, and can be ordered according to the description and drawings. The specific connection mode of each part adopts conventional means such as bolts, rivets and welding in the prior art. The mechanical parts and equipment adopt conventional types in the prior art, and the components known to those skilled in the art are known to the skilled person through technical manuals or conventional experimental methods.

[0133] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A human wearing test machine for anti-slip soles on wet grass with steep slopes, characterized in that, include: A base (1) is provided with an inclined part (11), a bracket (12) is installed on the inclined part (11), and a replaceable simulation test panel (2) is laid on the bracket (12). The base (1) has a handrail (3) on its upper edge. A safety component is installed on the handrail (3). One end of the safety component is retractable and can be fixed around the user. The spray assembly (6) is disposed on the base (1) and is used to spray water evenly onto the simulation test panel (2); A mud simulation component is mounted on the base (1) for outputting a mud-water mixture above or below the simulation test panel; The control panel (4) is set on the base (1). The control panel (4) is electrically connected to the spray assembly (6) and the mud simulation assembly. The control panel (4) is used to control the spray mode of the spray assembly (6) and the mud supply mode of the mud simulation assembly, and to perform the shoe sole anti-slip test in conjunction with the simulation test panel (2). The simulation test panel (2) has multiple first connectors (21) in the lower corner area, and the bracket (12) has a second connector (22) above the first connector (21) that is fixed to it. The simulation test panel (2) includes a grass patch (23), the grass patch (23) includes a net (231), grass patches (232) set on the upper layer of the net (231), and a hollow support plate set on the lower layer of the net (231). The first connector (21) is riveted to the corner of the net (231). The hollow support plate includes a plurality of elastic rods (233). The elastic rods (233) are bonded to the upper grass patches (232) and abut against the base (1) below. It also includes an extension (234) inclinedly disposed on the side of the elastic support (233), the extension (234) facing the mud simulation component, and an opening groove (235) disposed above the extension (234) to store the mud-water mixture output by the mud simulation component.

2. The human wearing test machine for anti-slip soles on wet grass with a large slope as described in claim 1, characterized in that: The safety components include a differential seat belt (31), a safety buckle (32) installed at the end of the differential seat belt (31), and a waist belt (33) for fastening the differential seat belt (31) to the human body, the safety buckle (32) being installed on the bracket (12).

3. The human wearing test machine for anti-slip soles on wet grass slopes according to claim 1, characterized in that: The first connector (21) includes a support rod (211) connected to the bottom of the simulation test panel (2) and a ball head (212) disposed at the end of the support rod (211). The second connector (22) includes a positioning groove (221) provided on the bracket (12) that matches the ball head (212), and an elastic membrane (222) is covered at the opening above the positioning groove (221), the elastic membrane (222) being embedded in the bracket (12).

4. The human wearing test machine for anti-slip soles on wet grass with a large slope according to claim 3, characterized in that: The simulation test panel (2) includes a stone sheet (24), which includes a plastic frame (241) and a stone slab (242) embedded in the plastic frame (241). The first connector (21) is located below the plastic frame (241).

5. The human wearing test machine for anti-slip soles on wet grass with a large slope according to claim 4, characterized in that: The mud simulation component includes a mud and water output bar (5) set at the high point of the inclined section (11) and a lifting drive component that drives the mud and water output bar (5) to rise and fall. The lifting drive component is electrically connected to the control panel (4). When the simulation test panel (2) can pass through the mud and water, the control panel (4) controls the lifting drive component to drive the mud and water output bar (5) to fall down and hide the output mud and water mixture. When the surface of the simulation test panel (2) is smooth and impermeable to mud and water, the control panel (4) controls the lifting drive assembly to drive the mud and water output bar (5) to rise and output the mud and water mixture.

6. The human wearing test machine for anti-slip soles on wet grass with a large slope according to claim 5, characterized in that: It also includes a mud and water storage tank (51) disposed inside the base (1) and a first water pump (52) disposed inside the base (1) and connected to the mud and water storage tank (51) via a pipe (56), the first water pump (52) being electrically connected to the control panel (4); The mud and water output bar (5) is provided with an output head (53) facing the simulation test panel (2). The output head (53) is connected to the first water pump (52) installed inside the base (1) through the pipe (56). The first water pump (52) is started / stopped through the control panel (4). The mud and water mixture in the mud and water storage tank (51) is output through the output head (53) through the first water pump (52).

7. The human wearing test machine for anti-slip soles on wet grass slopes according to claim 6, characterized in that: It also includes a stirring assembly (54) disposed inside the mud and water storage tank (51), which mixes and stirs the mud and water inside the mud and water storage tank (51) before the first water pump (52) is turned on.

8. The human wearing test machine for anti-slip soles on wet grass slopes according to claim 5, characterized in that: The spray assembly (6) includes a water tank (61) disposed inside the base (1), a second water pump (62) connected to the water tank (61), a spray pipeline connected to the second water pump (62), and a plurality of nozzles (63) disposed above the bracket (12). The spray pipeline includes a horizontal pipe extending along both sides of the support (12) and a vertical branch pipe (64) communicating with the horizontal pipe. The nozzle (63) is installed at the end of the vertical branch pipe (64) for uniformly spraying water onto the simulation test panel (2).

9. The human wearing test machine for anti-slip soles on wet grass slopes according to claim 8, characterized in that: The nozzle (63) is an adjustable angle shower head (63), and its spraying modes include continuous spraying and intermittent spraying; The spray assembly (6) also includes a pull-out water receiving tray (7) located below the base (1). When only the nozzle (63) is used for spraying water, the water mixed with mud is recycled through the water receiving tray (7).

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