Combined grizzly motion classifying conveyor
The combined grid screen motion grading conveyor realizes the grading and conveying of complex sand and gravel aggregates, solves the problems of equipment wear and low efficiency, and optimizes the production process and land use.
Patent Information
- Application Number
- CN202522072121.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-26
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-26
AI Technical Summary
In existing technologies, the volume differences of complex sand and gravel aggregates lead to severe wear and tear on crushing equipment, low efficiency, and large initial sorting plant area with poor practicality.
A combined grid screen motion grading conveyor is adopted to achieve the grading and conveying of large and small materials, which are then fed into different crushing equipment to avoid equipment wear and improve efficiency.
It effectively separates large and small pieces of material, reduces equipment wear, improves production efficiency, and reduces floor space requirements.
Smart Images
Figure CN224673116U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of material conveying technology, specifically to a combined grid screen motion grading conveyor. Background Technology
[0002] As the raw materials for sand and gravel aggregates become more diversified, various complex materials such as road construction waste, tailings from mineral processing plants, and pebbles cleared from river renovation are used as raw materials for building aggregates.
[0003] The complexity of these materials is mainly reflected in their large differences in size, making them unsuitable for simple crushing techniques.
[0004] Specifically, the uncertainty caused by the excessive mixing of these materials results in all materials being fed into the primary crushing equipment during production. This primary crushing equipment is typically designed for larger raw materials; smaller materials cannot be effectively crushed, and they can also interfere with the normal operation of internal components, leading to a series of adverse effects such as equipment wear, excessive vibration, and reduced efficiency. Figure 3 The diagram shows the basic configuration of an existing crushing production line.
[0005] At this point, if an initial raw material sorting plant is built to perform preliminary sorting of raw materials, it will greatly improve the production situation. However, the normal crushing production plant has limited land area and requires most of the plant area to be used as raw material and finished product storage yards. On the other hand, the initial raw material sorting plant occupies a huge area and occupies a portion of the raw material storage yard. Therefore, the practicality of building an initial raw material sorting plant is very poor.
[0006] For the reasons mentioned above, it is necessary to implement graded transportation of raw materials on the basis of traditional crushing production lines to solve the aforementioned problems. Utility Model Content
[0007] The purpose of this invention is to address the shortcomings of existing technologies by providing a combined grid screen motion grading conveyor for solving the problem of raw material grading and conveying.
[0008] To achieve the above objectives, the technical solution adopted by this utility model is: a combined grid screen motion grading conveyor, including a grid screen conveyor, a grid screen conveyor feed hopper, a large material discharge hopper, a lower material collection belt conveyor, a material collection trough, and a small material discharge hopper; The grid screen conveyor includes a chain conveyor and grid screens. The spacing of the grid screens is set according to the size of the graded material to allow small pieces of material to pass through the spacing of the grid screens during the conveying process. The feed hopper of the grid screen conveyor is located above the feed side of the grid screen conveyor and is used to provide ungraded raw materials; The large material discharge hopper is located on the discharge side of the grid screen conveyor and is used to receive large materials sent by the grid screen conveyor. The material collection trough is located below the grid screen conveyor and is used to catch small pieces of material falling from the grid screen conveyor. The lower material collection belt conveyor is located below the material collection trough, and the small material discharge hopper is located on the discharge side of the lower material collection belt conveyor, used to transfer the small material collected in the material collection trough to the small material discharge hopper.
[0009] Preferably, the chain conveyor includes at least one pair of chains and sprockets, and the grid screen includes a plurality of grid screen bars disposed between the pair of chains, the spacing between adjacent grid screen bars constituting the screening spacing of the grid screen.
[0010] Preferably, a screen conveyor cleaner is provided at the downward chain of the screen conveyor for cleaning the surface of the screen.
[0011] Preferably, there are two cleaners for the grid screen conveyor, located at the upper and lower parts of the downward chain of the grid screen conveyor, respectively.
[0012] Preferably, the bottom of the collection trough is located below the feed side sprocket of the grid screen conveyor, and the feed side sprocket and chain of the grid screen conveyor form a rolling structure for crushing the material.
[0013] Preferably, a cleaner is provided at the downward conveyor belt of the lower material collection belt conveyor for cleaning the surface of the lower material collection belt conveyor.
[0014] Preferably, the screen conveyor, screen conveyor feed hopper, large material discharge hopper, lower material collection belt conveyor, material collection trough and small material discharge hopper are all integrated and installed on a set of conveyor steel frame structure.
[0015] Preferably, the highest end of the collection trough is adjacent to the discharge side sprocket of the grid screen conveyor.
[0016] Preferably, the grid screen conveyor and the lower collecting belt conveyor are parallel to each other, and both are conveyors with the feed side lower than the discharge side.
[0017] Preferably, the drive wheels of the grid screen conveyor and the lower material collection belt conveyor are linked by a transmission belt.
[0018] This utility model has substantial features and progress compared to the prior art. Specifically, in the raw material conveying stage, this utility model achieves the separation of large and small materials through a grid screen conveyor. Large materials are discharged from the large material discharge hopper and sent to the primary crushing equipment for crushing, while small materials are discharged from the small material discharge hopper and sent to other crushing equipment. This effectively avoids a series of problems caused by too many small materials being introduced into the primary crushing equipment, such as material confusion, increased equipment wear and tear, and decreased production efficiency. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of a combined grid screen motion grading conveyor in this utility model.
[0020] Figure 2 This is a reference diagram showing the usage status of a combined grid screen motion grading conveyor in this utility model.
[0021] Figure 3 This is the feeding diagram of a primary crushing device in the existing technology.
[0022] In the diagram: 1. Screen conveyor; 2. Screen conveyor feed hopper; 3. Large material discharge hopper; 4. Lower collection belt conveyor; 5. Collection trough; 6. Small material discharge hopper; 7. Screen conveyor cleaner; 8. Collection conveyor cleaner; 9. Primary crushing equipment; 11. Chain; 12. Sprocket assembly; 13. Screen. Detailed Implementation
[0023] The technical solution of this utility model will be further described in detail below through specific embodiments.
[0024] like Figure 1 and Figure 2 As shown, a combined grid screen motion grading conveyor includes a grid screen conveyor 1, a grid screen conveyor feed hopper 2, a large material discharge hopper 3, a lower collecting belt conveyor 4, a collecting trough 5, and a small material discharge hopper 6.
[0025] The grid screen conveyor 1 includes a chain conveyor and grid screens. The spacing of the grid screens is set according to the size of the graded materials, so as to allow small pieces of materials to pass through the spacing of the grid screens during the conveying process.
[0026] Specifically, in this embodiment, the chain conveyor 1 includes at least one pair of chains 11 and sprocket assembly 12, and the grid screen 13 includes several grid screen bars disposed between the pair of chains. The spacing between adjacent grid screen bars constitutes the screening spacing of the grid screen. The spacing of the grid screen is determined according to the size of the material to be sorted, for example, it can be set between 50mm and 80mm.
[0027] The feed hopper 2 of the grid screen conveyor is located above the feed side of the grid screen conveyor 1 and is used to provide ungraded raw materials.
[0028] The large material discharge hopper 3 is located on the discharge side of the grid screen conveyor 1 and is used to receive large materials delivered by the grid screen conveyor 1.
[0029] The collection trough 5 is located below the screen conveyor 1 and is used to receive small pieces of material falling from the screen conveyor 1. Specifically, in this embodiment, the bottom of the collection trough 5 is located below the feed side sprocket of the screen conveyor 1. The feed side sprocket and chain of the screen conveyor 1 form a rolling structure to crush the material. This is mainly to deal with the situation where some material sizes are stuck between the screens, that is, they cannot fall or be fed into the large material discharge hopper. The crushed material will also enter the collection trough 5.
[0030] The lower material collection belt conveyor 4 is located below the material collection trough 5. The highest end of the material collection trough is close to the sprocket on the discharge side of the screen conveyor. The small material discharge hopper is located on the discharge side of the lower material collection belt conveyor 4 and is used to transfer the small material collected in the material collection trough 5 to the small material discharge hopper 6.
[0031] The screen conveyor, screen conveyor feed hopper, large material discharge hopper, lower collecting belt conveyor, collecting trough, and small material discharge hopper are all integrated and installed on a single conveyor steel frame structure, replacing the traditional raw material feeder. The screen conveyor and the lower collecting belt conveyor are parallel to each other, with the feed side lower than the discharge side.
[0032] To ensure cleanliness, two screen cleaners 7 are installed on the downward chain of the screen conveyor, located at the upper and lower parts of the downward chain of the screen conveyor, respectively, for cleaning the surface of the screen.
[0033] The lower material collection belt conveyor is equipped with a lower material collection conveyor cleaner 8 at the downward conveyor belt for cleaning the surface of the lower material collection belt conveyor.
[0034] In terms of transmission, in this embodiment, the drive wheels of the grid screen conveyor and the lower material collection belt conveyor are linked by a transmission belt. In other embodiments, they can also be driven by independent motors. Of course, the speed ratio of the grid screen conveyor and the lower material collection belt conveyor can be set according to the diameter ratio of the sprocket or pulley used for linkage.
[0035] Working principle explanation: During operation, an external power source transmits power to the large material grid conveyor 1. The operation of the grid conveyor 1 carries the material out of the grid conveyor feed hopper 2. During operation, the movement of the grid conveyor itself causes the angle of repose of the material on the grid conveyor to change continuously. The constantly changing angle of repose causes the material to vibrate on the grid conveyor, and the grid gap is used for grading.
[0036] In this process, large pieces of material are clamped in the gaps between the screens, while small pieces fall freely through these gaps, completing the initial grading. Because the screens are installed between chains, the two chains move forward synchronously during operation. The moment the chains come into contact with the sprockets, they generate a certain impact energy, causing the screens to vibrate continuously. This continuous vibration causes the gaps between the screens to change, allowing some of the loose material clamped between them to fall through the gaps, completing the motion grading. The large pieces of material clamped between the screens enter the primary crushing equipment 9 through the discharge hopper for crushing, while the small pieces are conveyed down by the screen conveyor for vibration trimming and grading. The small pieces that fall down are directly conveyed down by the screen conveyor into the collection trough.
[0037] In addition, some relatively large pieces of material that fall down cannot pass through the downward grid screen and can only slide down the grid screen conveyor to the rear sprocket group area. When the rear sprocket group rotates, it drives the grid screen to crush the material in this area. The crushed material that can pass through the gap of the grid screen is discharged into the collection trough, thus completing the full classification of the material.
[0038] The downward flow of the grid screen conveyor and the buffering effect of the grid screen prevent the material from directly impacting the collection conveyor and the collection trough, thus ensuring the stability of the equipment.
[0039] The sorted small pieces of material are then transferred to the small material discharge hopper by the lower collection belt conveyor, and then transported to the next stage of crushing area through the discharge hopper, ensuring production efficiency and reducing equipment wear.
[0040] During normal production, the lower material collection belt conveyor and the grid screen conveyor operate synchronously. In special circumstances, the optimal material layer thickness on the lower material collection belt conveyor can be determined by adjusting the sprocket size to change its rotation speed. This ensures smooth operation without jamming, and reducing the material layer thickness also reduces the power required by the lower material collection belt conveyor, thus reducing equipment production costs to some extent. The distance between the lower material collection belt conveyor and the grid screen conveyor can be adjusted according to the material size to ensure sufficient storage space between them and guarantee the effect of motion grading. The required distance between the lower material collection belt conveyor and the grid screen conveyor can be determined by adjusting wedge blocks or hydraulic cylinders.
[0041] After small pieces of material are passed through the sieve into the collection trough, the downward sieve of the sieve conveyor is cleaned. The two cleaners ensure the cleanliness of the sieve bars, preventing material adhesion caused by moisture or static electricity. The clean downward sieve rotates to the upward direction to pick up material from the feed hopper again, ensuring continuous operation. The arrangement of the cleaners on the collection conveyor ensures the clean operation of the lower collection belt conveyor, preventing material adhesion. The cleaners are positioned so that all the material on the collection conveyor flows into the discharge hopper, reducing the number of dust collection points. Because the collection trough relatively encloses the space between the collection conveyor and the sieve conveyor, it reduces dust spillage.
[0042] Finally, it should be noted that: the preferred embodiments of this patent have been described in detail above, but this patent is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this patent.
Claims
1. A combined grid screen motion grading conveyor, characterized in that: Includes a grid screen conveyor, a grid screen conveyor feed hopper, a large material discharge hopper, a lower material collection belt conveyor, a material collection trough, and a small material discharge hopper; The grid screen conveyor includes a chain conveyor and grid screens. The spacing of the grid screens is set according to the size of the graded material to allow small pieces of material to pass through the spacing of the grid screens during the conveying process. The feed hopper of the grid screen conveyor is located above the feed side of the grid screen conveyor and is used to provide ungraded raw materials; The large material discharge hopper is located on the discharge side of the grid screen conveyor and is used to receive large materials sent by the grid screen conveyor. The material collection trough is located below the grid screen conveyor and is used to catch small pieces of material falling from the grid screen conveyor. The lower material collection belt conveyor is located below the material collection trough, and the small material discharge hopper is located on the discharge side of the lower material collection belt conveyor, used to transfer the small material collected in the material collection trough to the small material discharge hopper.
2. The combined grid screen motion grading conveyor according to claim 1, characterized in that: The chain conveyor includes at least one pair of chains and sprockets, and the grid screen includes several grid screen bars disposed between the pair of chains, the spacing between adjacent grid screen bars constituting the screening spacing of the grid screen.
3. The combined grid screen motion grading conveyor according to claim 1, characterized in that: A screen cleaner is installed on the downward chain of the screen conveyor to clean the surface of the screen.
4. The combined grid screen motion grading conveyor according to claim 3, characterized in that: The screen conveyor cleaner is provided in two parts, located at the upper and lower parts of the downward chain of the screen conveyor, respectively.
5. The combined grid screen motion grading conveyor according to claim 2, characterized in that: The bottom of the collection trough is located below the feed side sprocket of the grid screen conveyor. The feed side sprocket and chain of the grid screen conveyor form a rolling structure for crushing materials.
6. The combined grid screen motion grading conveyor according to claim 1, characterized in that: The lower material collection belt conveyor is equipped with a cleaner at the downward conveyor belt to clean the surface of the lower material collection belt conveyor.
7. The combined grid screen motion grading conveyor according to claim 1, characterized in that: The screen conveyor, screen conveyor feed hopper, large material discharge hopper, lower material collection belt conveyor, material collection trough and small material discharge hopper are all integrated and installed on a set of conveyor steel frame structure.
8. The combined grid screen motion grading conveyor according to claim 5, characterized in that: The highest end of the collection trough is near the discharge side sprocket of the grid screen conveyor.
9. The combined grid screen motion grading conveyor according to claim 1, characterized in that: The grid screen conveyor and the lower material collection belt conveyor are parallel to each other, and both are conveyors with the feed side lower than the discharge side.
10. The combined grid screen motion grading conveyor according to claim 1, characterized in that: The drive wheels of the grid screen conveyor and the lower aggregate belt conveyor are linked by a transmission belt.