A hutch for culturing forest musk deer
By designing inclined climbing and protective mechanisms in the musk deer enclosures, the problems of insufficient activity and safety of musk deer have been solved, their climbing instincts have been stimulated, their activity levels have increased, their health has been improved, and cleaning and maintenance have been simplified.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GANSU SHANSHEYUAN BIOTECHNOLOGY CO LTD
- Filing Date
- 2025-08-26
- Publication Date
- 2026-07-31
AI Technical Summary
The lack of climbing facilities in existing musk deer breeding enclosures leads to insufficient activity, suppressed climbing instincts, and negatively impacts health. Some enclosures, while having climbing structures, are simple and lack protection, making it easy for musk deer to collide and get injured. It is difficult to balance safety with adapting to their habits.
Design a musk deer breeding enclosure, including an inclined climbing mechanism and a protective mechanism. The inclined climbing mechanism consists of a climbing board, a guardrail, and an anti-slip rubber mat. The protective mechanism consists of an inclined board, a wear-resistant canvas, and a high-density sponge. Combined with a folding hinge mechanism, it can be flexibly stored and fixed to ensure safety and adaptability.
Through the coordinated design of the inclined climbing mechanism and the protective mechanism, the climbing instinct of the musk deer is stimulated, increasing its activity level and improving its health, while providing safety protection to avoid collision injuries and simplifying the cleaning and maintenance process.
Smart Images
Figure CN224571995U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of musk deer breeding technology, specifically a musk deer breeding enclosure. Background Technology
[0002] The forest musk deer is the smallest species in the musk genus. Male forest musk deer secrete musk, which has high medicinal value. They possess musk glands in their groin area that secrete musk. The aroma of musk is rich, long-lasting, and renowned worldwide. It is used as a fixative in high-grade perfumes and fragrances, and as a stimulant of the central nervous system, used in the formulation of various emergency drugs for reviving and strengthening the heart. It possesses extremely high economic and medicinal value. Artificial breeding of forest musk deer requires a permit.
[0003] A Chinese patent, CN223025169U, discloses a musk deer breeding enclosure. Its structure includes a resting unit and a wall surrounding one side of the resting unit, forming a common activity area within the wall, providing basic habitat and activity space for the musk deer. However, this enclosure has the following shortcomings in adapting to the wild habits of musk deer and ensuring breeding safety: On the one hand, its public activity area is not equipped with any climbing facilities. Climbing is one of the core wild habits of the musk deer. The lack of such facilities will lead to a lack of daily activity for the musk deer. The climbing instinct will be suppressed for a long time, which will not only easily cause physiological problems such as poor muscle development and slowed metabolism, but also cause anxiety and stereotyped behavior due to unmet behavioral needs, which will seriously affect its physiological and behavioral health. On the other hand, while other musk deer enclosures in the industry have recognized this problem and added climbing structures, these structures are mostly simple (such as directly erecting logs or metal frames). When musk deer climb, they are prone to collisions and injuries due to unstable structures or lack of cushioning protection. It is difficult to meet their wild habits while ensuring safety, resulting in a double imbalance between safety and habit adaptation. Utility Model Content
[0004] The purpose of this utility model is to provide a musk deer breeding enclosure to solve the problems of existing musk deer breeding enclosures, which lack climbing facilities, resulting in insufficient activity and suppressed climbing instincts of musk deer, which is detrimental to their health; although some enclosures have climbing structures, they are simple and lack protection, making it easy for musk deer to collide and get injured, and it is difficult to balance safety and habit adaptation.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a musk deer breeding enclosure, comprising a resting unit, a wall on one side of the resting unit, and a top protective net laid on the wall and the resting unit. An activity area is formed between the resting unit and the wall. The enclosure also includes a folding hinge mechanism on the inner wall of the wall, an inclined climbing mechanism hinged to the folding hinge mechanism, and a protective mechanism on the inner wall of the wall and above the inclined climbing mechanism. The inclined climbing mechanism and the protective mechanism are arranged in a figure-eight shape, and the protective mechanism is inclined towards the central axis of the inclined climbing mechanism.
[0006] Furthermore, the inclined climbing mechanism includes a climbing board, guardrails respectively located on both sides of the upper side of the climbing board, and an anti-slip rubber pad located on the upper side of the climbing board with a bark-like texture; the angle between the climbing board and the inner bottom surface of the activity area is 30-40 degrees.
[0007] Furthermore, the lower end of the ramp plate is connected to two hinged plates arranged at intervals; multiple horizontally spaced holes are opened on one side of the wall, and sliding sleeves are provided on the inner walls of the holes; the folding hinge mechanism includes two vertically spaced sliding guide mechanisms arranged horizontally at intervals on the inner wall of the wall, a moving block hinged between the two hinged plates, multiple pull rods arranged at equal intervals on one side of the moving block, a pull plate located at one end of the multiple pull rods and tightly fitted to the outer side of the wall, two handles arranged at intervals on the outer side of the pull plate, and a locking device located on the outer side of the wall and connected to the pull plate; the end of the ramp plate away from the two hinged plates is located between and hinged to the two vertically spaced sliding guide mechanisms; the pull rods and the inner walls of the corresponding sliding sleeves are in sliding clearance fit, and the gap between them is ≤2mm.
[0008] Furthermore, the inner bottom surface of the activity area is provided with an L-shaped support pad, and the inner wall of the L-shaped support pad is provided with anti-slip texture; the moving block is in close contact with the inner wall of the L-shaped support pad.
[0009] Furthermore, the pull plate has two spaced-apart perforations on one side, the perforations being located above the two handles; the locking device includes two threaded rods spaced apart on the outer wall of the enclosure, and a locking nut threadedly engaged with the threaded rods; one end of the threaded rod passes through the corresponding perforation and extends to one side of the pull plate, and the threaded rod and the perforation are in transition fit; the locking nut is tightly abutted against one side of the pull plate.
[0010] Furthermore, the vertical sliding guide mechanism includes a sliding guide rail disposed on the inner wall of the enclosure, a slider that slides in cooperation with the sliding guide rail, and a hinge seat connected to one end of the slider; the hinge seat is hinged to one side of the ramp plate; the sliding resistance of the slider is ≤50N.
[0011] Furthermore, one side of the enclosure is provided with an observation window located between two sliding guide rails, and the interior of the observation window is provided with wire mesh flush with the inner wall of the enclosure.
[0012] Furthermore, the inner wall of the enclosure is provided with a window frame adjacent to the observation window, the window frame is provided with a sliding glass window, and the inner wall of the enclosure is provided with a stainless steel food trough located below the window frame; the outer wall of the enclosure is provided with a door arranged opposite to the window frame.
[0013] Furthermore, the protective mechanism includes multiple L-shaped supports arranged horizontally at intervals on the inner side of the wall, inclined plates at both ends of the multiple L-shaped supports, wear-resistant canvas on one side of the inclined plates, and high-density sponge wrapped inside the wear-resistant canvas; the angle between the inclined plates and the inner wall of the wall is 40-50 degrees.
[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: In this invention, the enclosure for raising musk deer utilizes a synergistic combination of an inclined climbing mechanism and a protective structure. This not only creates a safety barrier for the musk deer, ensuring their stability and safety during climbing, but also mimics their natural climbing habits in the wild, effectively stimulating their instinctive behaviors and thus enhancing their physical condition and health by increasing their daily activity levels. Furthermore, the folding hinge mechanism allows the climbing board to be flexibly stored and securely fixed according to actual needs, fully meeting the diverse activity requirements of the musk deer and simplifying the cleaning and maintenance process of the activity area, creating a more comfortable and hygienic living environment for them. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of the enclosure for raising musk deer according to this utility model; Figure 2 This is a cross-sectional schematic diagram of the enclosure for raising musk deer according to this utility model; Figure 3 For the present utility model Figure 2 Enlarged schematic diagram of the central locking device; Figure 4 For the present utility model Figure 2 Enlarged schematic diagram of the L-shaped support pad Figure 5 This is a schematic diagram of the inclined climbing mechanism of this utility model.
[0016] In the diagram: 1. Rest unit; 2. Enclosure; 3. Activity area; 4. Window frame; 5. Sliding glass window; 6. Stainless steel food trough; 7. Door; 8. Observation window; 9. Wire mesh; 10. Protective mechanism; 11. Inclined climbing mechanism; 12. L-shaped bracket; 13. Inclined plate; 14. High-density sponge; 15. Wear-resistant canvas; 16. Slide rail; 17. Slider; 18. Hinge seat; 19. Climbing plate; 20. Guardrail; 21. Anti-slip rubber pad; 22. Hinge plate; 23. Moving block; 24. L-shaped support pad; 25. Pull rod; 26. Pull plate; 27. Handle; 28. Perforation; 29. Hole; 30. Sliding sleeve; 31. Screw; 32. Locking nut; 33. Top protective net. Detailed Implementation
[0017] Please see Figure 1-5 A musk deer breeding enclosure includes a resting unit 1, a wall 2 located on one side of the resting unit 1, and a top protective net 33 laid on the wall 2 and the upper side of the resting unit 1. The mesh size of the top protective net 33 is ≤5cm×5cm. An activity area 3 is formed between the resting unit 1 and the wall 2. The resting unit 1 consists of multiple independently set rest rooms, which provide a separate resting space for each musk deer. A 5-10cm thick layer of humus and fallen leaves is laid on the lower side of the activity area 3. The enclosure also includes a folding hinge mechanism located on the inner wall of the wall 2, an inclined climbing mechanism 11 hinged to the folding hinge mechanism, and a protective mechanism 10 located on the inner wall of the wall 2 and above the inclined climbing mechanism 11. The inclined climbing mechanism 11 and the protective mechanism 10 are arranged in a V-shape, and the protective mechanism 10 is inclined towards the central axis of the inclined climbing mechanism 11.
[0018] This application further proposes that the inclined climbing mechanism 11 includes a climbing board 19, guardrails 20 respectively fixedly connected to the upper sides of the climbing board 19, and anti-slip rubber pads 21 fixed to the upper side of the climbing board 19 with a surface textured like tree bark; the angle between the climbing board 19 and the inner bottom surface of the activity area 3 is 30-40 degrees; the guardrails 20 extend along the length of the climbing board 19, and the height of the guardrails 20 is 30-40cm to prevent the musk deer from falling while climbing. Specifically, the guardrail 20 can prevent the musk deer from slipping off the sides of the climbing board 19 during the climbing process, providing lateral protection for it; the anti-slip rubber pad 21 with a bark-like texture increases the friction between the musk deer's hooves and the climbing board 19, reducing the risk of slipping, while simulating the feel of bark in the natural environment, which is more in line with the climbing habits of the musk deer; the 30-40 degree inclination angle is not only in line with the climbing ability of the musk deer, but also moderately increases its activity intensity, promotes physical exertion, and improves the quality of the musk deer's activities in the captive environment.
[0019] This application further proposes that two hinged plates 22 are fixedly connected to one lower end of the ramp plate 19 at intervals; multiple horizontally spaced holes 29 are opened on one side of the wall 2, and sliding sleeves 30 are fixedly installed on the inner wall of the holes 29; the folding hinge mechanism includes two vertically spaced sliding guide mechanisms fixed to the inner wall of the wall 2, a moving block 23 hinged between the two hinged plates 22, multiple pull rods 25 fixed at equal intervals to one side of the moving block 23, a pull plate 26 located at one end of the multiple pull rods 25 and tightly fitted to the outer side of the wall 2, two handles 27 welded to the outer side of the pull plate 26 and spaced apart, and a locking device located on the outer side of the wall 2 and connected to the pull plate 26; one end of the ramp plate 19 away from the two hinged plates 22 is located between the two vertically spaced sliding guide mechanisms and hinged thereto; the pull rods 25 and the inner wall of the corresponding sliding sleeves 30 are in sliding clearance fit, and the gap between them is ≤2mm.
[0020] Specifically, the small clearance between the pull rod 25 and the sliding sleeve 30 ensures the stability of the climbing board 19 when the moving block 23 drives it to move; by pulling the pull plate 26 through the handle 27, the folding and unfolding of the climbing board 19 can be controlled to meet the different needs of cleaning the activity area 3 and climbing by the musk deer; the locking device can firmly fix the pull plate 26 to ensure the stability of the climbing board 19 when the musk deer climbs.
[0021] This application further proposes that an L-shaped support pad 24 is provided on the inner bottom surface of the activity area 3, and the inner wall of the L-shaped support pad 24 is provided with anti-slip texture; the moving block 23 is in close contact with the inner wall of the L-shaped support pad 24.
[0022] Among them, the L-shaped support pad 24 is fixed to the ground of the activity area 3 by expansion bolts, with a embedment depth of ≥10cm; the moving block 23 is hinged to the hinge plate 22 on the lower side of the climbing plate 19 to form a bottom support structure for the climbing plate 19.
[0023] Specifically, the fixed connection between the L-shaped support pad 24 and the bottom surface of the active area 3 provides a support base for the movable block 23; the anti-slip texture on the inner wall increases the friction between the movable block 23 and the movable block 23, and the tight fit between the two can prevent the movable block 23 from sliding when the musk deer climbs the climbing board 19, ensuring the support stability of the climbing board 19; at the same time, when it is necessary to fold the climbing board 19, the movable block 23 can be detached from the L-shaped support pad 24 without affecting the folding operation.
[0024] This application further proposes that two through holes 28 are spaced apart on one side of the pull plate 26, and the through holes 28 are located above the two handles 27; the locking device includes two screws 31 fixed to the outer wall of the enclosure 2 and spaced apart, and a locking nut 32 threadedly engaged with the screws 31; one end of the screw 31 passes through the corresponding through hole 28 and extends to one side of the pull plate 26, and the screw 31 and the through hole 28 are in transition fit; the locking nut 32 is tightly abutted against one side of the pull plate 26.
[0025] Specifically, the transition fit between the screw 31 and the through hole 28 ensures that the pull plate 26 does not wobble when locked, thus improving structural stability; the tight contact between the locking nut 32 and the pull plate 26 can firmly fix the pull plate 26 to the outer wall of the enclosure 2, preventing the climbing board 19 from shifting when the musk deer climbs, and at the same time, it is easy to disassemble, which facilitates subsequent cleaning or maintenance of the activity area 3.
[0026] This application further proposes that the vertical sliding guide mechanism includes a sliding guide rail 16 fixed to the inner wall of the enclosure 2 by bolts, a slider 17 that slides with the sliding guide rail 16, and a hinge seat 18 welded to one end of the slider 17; the hinge seat 18 is hinged to one side of the ramp plate 19; the sliding resistance of the slider 17 is ≤50N.
[0027] The slide rail 16 is arranged vertically; the slider 17 is embedded in the slide rail 16 and forms a sliding fit with the slide rail 16, and can move freely along the length of the rail; the shaft hole on the hinge seat 18 is matched with the shaft pin preset on one side of the ramp plate 19 to realize the hinge between the two, so that the ramp plate 19 can rotate around the hinge point. Specifically, the sliding engagement between the slide rail 16 and the slider 17 provides a stable vertical guide for the folding and unfolding of the ramp 19; the hinge seat 18 connects the slider 17 and the ramp 19, enabling flexible adjustment of the angle of the ramp 19 to meet different needs for folding and storage and unfolding; the design of the slider 17 with a sliding resistance of ≤50N makes it easier and more convenient to manually fold or unfold the ramp 19, reducing management difficulty.
[0028] This application further proposes that an observation window 8 is provided on one side of the enclosure 2 between two sliding guide rails 16, and a wire mesh 9 flush with the inner wall of the enclosure 2 is welded and fixed inside the observation window 8; the wire mesh 9 is flush with the inner wall of the enclosure 2, without protrusion or depression; the mesh size of the wire mesh 9 is 2cm×2cm to prevent the musk deer from biting or sticking its head out. Specifically, the observation window 8 provides the musk deer with a way to look out, satisfying its desire to explore the outside environment and reducing the sense of oppression in captivity; the wire mesh 9 can prevent the musk deer from escaping through the window and avoid it from crashing into the window and getting injured, while not obstructing the musk deer's view; the mesh surface is flush with the inner wall of the enclosure, which can prevent the musk deer from getting caught in the activity and improve its safety.
[0029] This application further proposes that the inner wall of the enclosure 2 is fixedly connected to a window frame 4 adjacent to the observation window 8 by expansion bolts. The window frame 4 is equipped with a sliding glass window 5. A stainless steel feeding trough 6 located below the window frame 4 is welded and fixed to the inner wall of the enclosure 2. The outer side of the enclosure 2 is hinged to a door 7 arranged opposite to the window frame 4. The sliding glass window 5 is embedded in the window frame 4 and slides in cooperation with the sliding rail of the window frame 4, and can be opened and closed in the horizontal direction. The sliding glass window 5 is a one-way transparent glass to reduce visual interference to the musk deer during observation. Specifically, the combination of window frame 4 and sliding glass window 5 makes it easy for keepers to observe the status of musk deer in activity area 3 through the glass; stainless steel feeding trough 6 is located below window frame 4, making it convenient for keepers to feed the musk deer while observing them; and the door 7, which is arranged opposite to window frame 4, makes it easy for keepers to enter the inside of the enclosure 2 to maintain and clean the feeding trough 6 and other components.
[0030] This application further proposes that the protective mechanism 10 includes multiple L-shaped brackets 12 fixed to the inner side of the wall 2 and arranged horizontally at intervals, inclined plates 13 fastened to both ends of the multiple L-shaped brackets 12 by bolts, wear-resistant canvas 15 glued to one side of the inclined plates 13, and high-density sponge 14 wrapped inside the wear-resistant canvas 15; the angle between the inclined plates 13 and the inner wall of the wall 2 is 40-50 degrees.
[0031] Among them, multiple L-shaped brackets 12 and inclined plates 13 form a supporting skeleton; the edge of the wear-resistant canvas 15 is fixed to the edge of the inclined plate 13 by a stitching process, and the high-density sponge 14 is wrapped inside the wear-resistant canvas 15.
[0032] Specifically, the rigid connection between the L-shaped bracket 12 and the inclined plate 13 ensures the overall structural stability and can withstand the impact force of the musk deer climbing. The high-density sponge 14 effectively buffers the impact force, and the tensile and abrasion-resistant properties of the wear-resistant canvas 15 prevent the musk deer from being injured by direct collision with the hard structure, while also extending the service life of the protective components. The 40-50 degree inclination angle and the climbing plate 19 below form a suitable figure-eight space, which does not obstruct the musk deer's climbing path, but also covers the collision risk area when it climbs to the top, improving the safety protection performance of the enclosure. At the same time, it is in line with the timid and sensitive nature of the musk deer and reduces stress response.
[0033] Working process and principle: During the breeding of musk deer, when the musk deer are climbing, the anti-slip rubber pad 21 with imitation bark texture on the surface of the climbing board 19 can enhance the friction. The 30-40 degree inclination is suitable for its natural climbing habits. The guardrails 20 on both sides can prevent falls during climbing. The upper protection mechanism 10 forms a three-dimensional protection through a 40-50 degree inclined buffer layer (high-density sponge 14 and wear-resistant canvas 15), which avoids collisions and injuries when the musk deer climbs to the top. It not only provides the musk deer with a climbing carrier that conforms to its natural behavior, but also promotes its physiological health by increasing its activity level, thereby improving its adaptability to breeding. When cleaning activity area 3, first remove the two locking nuts 32 from the screw 31. Then, pull the pull plate 26 through the handle 27 to move the pull rod 25 horizontally along the sliding sleeve 30. Simultaneously, the moving block 23 is disengaged from the L-shaped support pad 24, and the slider 17 slides upward along the slide rail 16. Finally, the climbing plate 19 is folded and stored into the inner wall of the enclosure 2, facilitating the cleaning of activity area 3. When the climbing function needs to be restored, the transition fit between the screw 31 and the perforation 28 and the tightening of the locking nuts 32 ensure the overall structure is stable and reliable during climbing. In daily management, keepers can monitor the status of the musk deer in real time through the wire mesh 9 of the observation window 8 and the sliding glass window 5, and complete the feeding operation through the stainless steel feeding trough 6, taking into account both low-interference observation and efficient management needs.
[0034] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A housing for breeding forest musk deer, comprising a resting unit (1), a fence (2) arranged on one side of the resting unit (1), and a top protection net (33) arranged on the upper side of the fence (2) and the resting unit (1), wherein an activity area (3) is formed between the resting unit (1) and the fence (2), characterized in that, It also includes a folding hinge mechanism located on the inner wall of the enclosure (2), an inclined climbing mechanism (11) hinged to the folding hinge mechanism, and a protective mechanism (10) located on the inner wall of the enclosure (2) and above the inclined climbing mechanism (11); the inclined climbing mechanism (11) and the protective mechanism (10) are arranged in a figure-eight shape, and the protective mechanism (10) is inclined towards the central axis of the inclined climbing mechanism (11).
2. The housing for breeding of forest musk deer according to claim 1, wherein, The inclined climbing mechanism (11) includes a climbing board (19), guardrails (20) respectively located on both sides of the upper side of the climbing board (19), and anti-slip rubber pads (21) located on the upper side of the climbing board (19) with a bark-like texture on the surface; the angle between the climbing board (19) and the inner bottom surface of the activity area (3) is 30-40 degrees.
3. The housing for breeding of forest musk deer according to claim 2, wherein, The lower end of the ramp plate (19) is connected to two hinge plates (22) arranged at intervals; a plurality of horizontally spaced holes (29) are opened on one side of the wall (2), and a sliding sleeve (30) is provided on the inner wall of the hole (29); the folding hinge mechanism includes two vertical sliding guide mechanisms arranged at horizontal intervals on the inner wall of the wall (2), a moving block (23) hinged between the two hinge plates (22), and a plurality of pull rods (25) arranged at equal intervals on one side of the moving block (23). A pull plate (26) is provided at one end of multiple pull rods (25) and is tightly fitted to the outside of the wall (2); two handles (27) are provided on the outside of the pull plate (26) and spaced apart; a locking device is provided on the outside of the wall (2) and connected to the pull plate (26); the end of the ramp plate (19) away from the two hinge plates (22) is located between and hinged to the two vertical sliding guide mechanisms; the pull rod (25) and the inner wall of the corresponding sliding sleeve (30) are in sliding clearance fit, and the gap between them is ≤2mm.
4. The housing for breeding of forest musk deer according to claim 3, wherein, The inner bottom surface of the activity area (3) is provided with an L-shaped support pad (24), and the inner wall of the L-shaped support pad (24) is provided with anti-slip texture; the moving block (23) is closely fitted with the inner wall of the L-shaped support pad (24).
5. The housing for breeding of forest musk deer according to claim 3, wherein, The pull plate (26) has two perforations (28) spaced apart on one side, and the perforations (28) are located above the two handles (27); the locking device includes two screws (31) spaced apart on the outer wall of the enclosure (2) and a locking nut (32) threadedly engaged with the screws (31); one end of the screw (31) passes through the corresponding perforation (28) and extends to one side of the pull plate (26), and the screw (31) and the perforation (28) are transitionally engaged; the locking nut (32) is tightly abutted against one side of the pull plate (26).
6. The housing for breeding of forest musk deer according to claim 3, wherein The vertical sliding guide mechanism includes a groove guide rail (16) located on the inner wall of the enclosure (2), a slider (17) that slides with the groove guide rail (16), and a hinge seat (18) connected to one end of the slider (17); the hinge seat (18) is hinged to one side of the ramp plate (19); the sliding resistance of the slider (17) is ≤50N.
7. The housing for breeding of forest musk deer according to claim 6, wherein, One side of the enclosure (2) is provided with an observation window (8) located between two sliding guide rails (16), and the inside of the observation window (8) is provided with a wire mesh (9) flush with the inner wall of the enclosure (2).
8. The housing for breeding of forest musk deer according to claim 7, characterized in that, The inner wall of the enclosure (2) is provided with a window frame (4) adjacent to the observation window (8), and the inside of the window frame (4) is provided with a sliding glass window (5). The inner wall of the enclosure (2) is provided with a stainless steel food trough (6) located below the window frame (4); the outer side of the enclosure (2) is provided with a door (7) arranged opposite to the window frame (4).
9. The housing for breeding of musk deer according to claim 1, wherein The protective mechanism (10) includes multiple L-shaped supports (12) arranged horizontally at intervals on the inner side of the wall (2), inclined plates (13) at both ends of the multiple L-shaped supports (12), wear-resistant canvas (15) on one side of the inclined plate (13), and high-density sponge (14) wrapped inside the wear-resistant canvas (15); the angle between the inclined plate (13) and the inner wall of the wall (2) is 40-50 degrees.