Abrasion-resistant sandstone slow descent device
By using a multi-stage slow-descent chute and wear-resistant plate design, sand and gravel are gradually slowed down, solving the problems of rapid wear and splashing of the slow-descent device, and improving the device's lifespan and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NORTHWEST ENGINEERING CORPORATION LIMITED
- Filing Date
- 2025-08-28
- Publication Date
- 2026-06-23
AI Technical Summary
The existing slow-descent device has insufficient wear resistance, which leads to rapid wear of the guide plate, requiring frequent replacement, and the rebound and splashing of sand and gravel poses a safety hazard.
The design incorporates multi-stage slow-descent chutes and wear-resistant plates, combined with anti-splash guide surfaces, to gradually reduce the velocity of sand and gravel, thereby minimizing wear and limiting splashing.
It can extend the life of the equipment by 2-3 times, reduce the breakage rate of finished products, and reduce the risk of injury from splashing materials.
Smart Images
Figure CN224393623U_ABST
Abstract
Description
Technical Field
[0001] This utility model discloses a wear-resistant sand and gravel slow-descent device, which belongs to the field of sand and gravel aggregate conveying technology. Background Technology
[0002] In the production and transportation of sand and gravel, the materials need to be dropped from a high-altitude drop device for accumulation or transport. Due to the acceleration caused by gravity during the fall, the terminal velocity of the sand and gravel is relatively high. High-speed impact can easily cause secondary crushing of the finished sand and gravel, resulting in an increase in the undersize ratio. Existing deceleration devices have problems with insufficient wear resistance and lack of protection.
[0003] Currently, conventional guide vanes are used in sand and gravel descent devices. When the guide vanes are subjected to sand and gravel impacts for a long time, their surface wear rate is high, causing critical stress areas to wear through and fail in a short time. This requires frequent shutdowns for replacement, which seriously restricts continuous production capacity. At the same time, sand and gravel will bounce irregularly after colliding with the guide vanes, causing stones to fly, which poses a significant risk of personal injury. Summary of the Invention
[0004] This utility model overcomes the shortcomings of the prior art and proposes a wear-resistant sand and gravel slow descent device, including: a multi-stage slow descent chute, a top platform and a conveyor;
[0005] The multi-stage slow-descent chute includes multiple vertically distributed buffer units, which are connected to each other through discharge ports to form a staggered, progressively slow-descent channel.
[0006] The bottom discharge port of the multi-stage slow-descent chute is used as a sand and gravel discharge port;
[0007] The top platform is located at the top of the multi-stage slow-descent chute, and the top platform has a feed inlet corresponding to the multi-stage slow-descent chute.
[0008] The outlet end of the conveyor is located at the feed inlet of the top platform, and is used to transport sand and gravel to the feed inlet.
[0009] Preferably, each buffer unit includes multiple buffer steps, and adjacent buffer steps form a stepped descent channel through a height difference;
[0010] Each buffer unit is provided with a discharge port at its end, and the discharge port is connected to the top of the next level buffer unit.
[0011] Preferably, each buffer step includes: a horizontal wear-resistant plate and a vertical wear-resistant plate;
[0012] The horizontal wear-resistant plate and the vertical wear-resistant plate are fixedly arranged in a stepped manner;
[0013] The top of the vertical wear-resistant plate protrudes beyond the horizontal plane of the horizontal wear-resistant plate.
[0014] Preferably, it also includes wear-resistant side baffles for the chute;
[0015] The wear-resistant side baffles of the chute are symmetrically arranged on both sides of each buffer unit to limit the splashing of sand and gravel.
[0016] Preferably, the descent device further includes multiple columns and multiple crossbeams;
[0017] The multiple columns are vertically arranged on both sides of the multi-stage slow-descent chute and are fixedly connected to the multi-stage slow-descent chute.
[0018] The multiple horizontal beams are horizontally arranged at the top of the multiple columns and are fixedly connected to the multiple columns to form a frame support structure.
[0019] Preferably, the top of the wear-resistant side baffle of the chute is inclined inward to form a splash-proof guide surface.
[0020] Preferably, it also includes multiple diagonal braces and multiple horizontal bars;
[0021] Each diagonal brace is installed at an angle between adjacent columns to form cross support;
[0022] The multiple horizontal bars are horizontally arranged between adjacent columns, with both ends fixedly connected to the columns.
[0023] Compared with existing technologies, the beneficial effects of this invention are as follows: The stepped buffer design of this invention gradually reduces the falling speed of sand and gravel, avoiding secondary crushing caused by high-speed impact and significantly reducing the undersize rate of the finished product. The material pad protection mechanism reduces the wear of the horizontal wear-resistant plate, extending the device life to 2 to 3 times that of traditional structures. This application, combined with the anti-splash guide surface design, significantly reduces the risk of operators being injured by splashed materials. Attached Figure Description
[0024] Figure 1 This is a three-dimensional schematic diagram of the descent device in an embodiment of this utility model;
[0025] Figure 2 This is a front view schematic diagram of the descent device in an embodiment of this utility model;
[0026] Figure 3 This is a side view of the slow-descent device in an embodiment of the present invention.
[0027] In the diagram: 1. Belt conveyor; 2. Top platform; 3. Crossbeam; 4. Column; 5. Diagonal brace; 6. Crossbar; 7. Horizontal wear-resistant plate; 8. Vertical wear-resistant plate; 9. Wear-resistant side baffle of chute. Detailed Implementation
[0028] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0029] Please see Figures 1-3 As shown, this utility model relates to a wear-resistant sand and gravel slow-descent device, which is particularly suitable for vertical or inclined conveying scenarios of highly abrasive materials such as sand and gravel. The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings, so that those skilled in the art can clearly understand its structure, function, and working principle.
[0030] This device mainly includes the following core components: A top platform located at the top of the device for receiving sand and gravel materials. A feed inlet corresponding to the multi-stage slow-descent chute is located in the center of the platform. A feed belt conveyor 1, whose outlet end is fixed at the feed inlet of the top platform 2, continuously transports sand and gravel to the feed inlet. The multi-stage slow-descent chute consists of multiple vertically distributed buffer units, each including a stepped wear-resistant steel plate and a discharge port, forming a staggered, progressively slow-descent channel. Structural columns 4 are vertically installed on both sides of the slow-descent chute, and are fixedly connected to the chute via guide support steel to ensure overall stability. Wear-resistant side baffles 9 are symmetrically fixed on both sides of each buffer unit to limit sand and gravel splashing; their tops slope inwards to form a splash-proof guide surface.
[0031] Specifically, such as Figure 1 As shown, each buffer unit consists of multiple buffer steps, with adjacent steps forming a stepped descent channel due to height differences. Each buffer unit has a discharge port at its end, which connects to the top of the next buffer unit.
[0032] Specifically, each buffer step includes a horizontal wear-resistant plate 7 and a vertical wear-resistant plate 8, which are welded and fixed in a stepped manner. The top of the vertical wear-resistant plate 8 is 50mm higher than the surface of the horizontal plate (the specific height can be adjusted according to the material's angle of repose), forming a buffer barrier. When sand and gravel fall, the vertical plate slows down the impact and simultaneously accumulates above the horizontal plate to form a pad, reducing direct wear on the steel plate.
[0033] Specifically, the wear-resistant side baffle 9 of the chute is 500mm high and is symmetrically fixed on both sides of the buffer unit. The top is tilted inward by 10° to 15° to form a guide surface, which further suppresses sand and gravel splashing.
[0034] Specifically, such as Figure 2 and Figure 3As shown, it also includes multiple columns 4 and multiple crossbeams 3, with the columns 4 fixedly connected to the descent chute. The columns 4 are preferably channel steel or I-beams. The multiple crossbeams 3 are horizontally positioned at the top of the columns 4 and fixedly connected to them to form a frame support structure.
[0035] Specifically, it also includes multiple diagonal braces 5 and multiple horizontal bars 6; the multiple diagonal braces 5 are inclinedly arranged between adjacent columns, and the two ends of each diagonal brace 5 are respectively connected to different height positions of the column 4; a single diagonal brace 5 can form a triangular support with the horizontal bar 6, and the diagonal braces 5 can cross to form an X-shaped support. In this embodiment, the diagonal braces 5 are arranged crosswise to form a grid-like support structure with the horizontal bars 6. The multiple horizontal bars 6 are horizontally arranged between adjacent columns 4, and the two ends are respectively fixedly connected to the column 4; the diagonal braces 5 and the horizontal bars 6 form a grid-like support structure.
[0036] In another embodiment, a flow-guiding support steel section is also included. Specifically, the flow-guiding support steel section is a steel support baffle that is welded to the top of each buffer unit and has both support and flow-guiding functions.
[0037] The working principle and process of this utility model are as follows:
[0038] The feeding belt conveyor 1 transports sand and gravel to the top platform 2, where the material enters the primary slow-descent chute through the inlet. The sand and gravel slide down the stepped slow-descent channel, where vertical wear-resistant plates 8 reduce their velocity through impact, and the material pads on the horizontal wear-resistant plates 7 further absorb impact energy. When material accumulates in a buffer unit to the point of submerging the chute below, the discharge port of the upper chute evenly releases material in all directions to avoid localized blockages. Wear-resistant side baffles 9 limit lateral splashing of material, and inclined guide surfaces direct the sand and gravel towards the center of the chute. Structural columns 1 and guide support steel ensure the structural stability of the device under long-term high-load operation.
[0039] The stepped buffer design of this invention gradually reduces the falling speed of sand and gravel, avoiding secondary crushing caused by high-speed impact and significantly reducing the undersize rate of the finished product. The material pad protection mechanism reduces the wear of the horizontal wear-resistant plate, extending the device's lifespan to 2 to 3 times that of traditional structures. This application, combined with the anti-splash guide surface design, significantly reduces the risk of operators being injured by splashing materials.
[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A wear-resistant sand and gravel slow-descent device, characterized in that, include: Multi-stage descent chutes, top platform, and conveyors; The multi-stage slow-descent chute includes multiple vertically distributed buffer units, which are connected to each other through discharge ports to form a staggered, progressively slow-descent channel. The bottom discharge port of the multi-stage slow-descent chute is used as a sand and gravel discharge port; The top platform is located at the top of the multi-stage slow-descent chute, and the top platform has a feed inlet corresponding to the multi-stage slow-descent chute. The outlet end of the conveyor is located at the feed inlet of the top platform, and is used to transport sand and gravel to the feed inlet.
2. The wear-resistant sand and gravel descent device according to claim 1, characterized in that, Each buffer unit includes multiple buffer steps, and adjacent buffer steps form a stepped descent channel through the height difference. Each buffer unit is provided with a discharge port at its end, and the discharge port is connected to the top of the next level buffer unit.
3. The wear-resistant sand and gravel descent device according to claim 2, characterized in that, Each buffer step includes: a horizontal wear-resistant plate and a vertical wear-resistant plate; The horizontal wear-resistant plate and the vertical wear-resistant plate are fixedly arranged in a stepped manner; The top of the vertical wear-resistant plate protrudes beyond the horizontal plane of the horizontal wear-resistant plate.
4. The wear-resistant sand and gravel descent device according to claim 1, characterized in that, It also includes wear-resistant side baffles for the chute; The wear-resistant side baffles of the chute are symmetrically arranged on both sides of each buffer unit to limit the splashing of sand and gravel.
5. The wear-resistant sand and gravel descent device according to claim 1, characterized in that, The descent device also includes multiple columns and multiple crossbeams; The multiple columns are vertically arranged on both sides of the multi-stage slow-descent chute and are fixedly connected to the multi-stage slow-descent chute. The multiple horizontal beams are horizontally arranged at the top of the multiple columns and are fixedly connected to the multiple columns to form a frame support structure.
6. The wear-resistant sand and gravel descent device according to claim 4, characterized in that, The top of the wear-resistant side baffle of the chute is inclined inward to form a splash-proof guide surface.
7. The wear-resistant sand and gravel descent device according to claim 5, characterized in that, It also includes multiple diagonal braces and multiple horizontal bars; Each diagonal brace is installed at an angle between adjacent columns to form cross support; The multiple horizontal bars are horizontally arranged between adjacent columns, with both ends fixedly connected to the columns.