Production line for preparing machine-made sand from construction waste

Abstract

The utility model relates to a production line for preparing machine-made sand by using construction waste, which comprises a raw material crushing system, a screening system and a sand making system, and the raw material crushing system sequentially comprises a plate chain feeder, a jaw crusher and an impact crusher; the screening system comprises a first vibrating screen and a second vibrating screen, raw materials crushed by the impact crusher are conveyed to the first vibrating screen, the first vibrating screen is connected with a first aggregate bin and the second vibrating screen, and the second vibrating screen is connected with different second aggregate bins; the sand making system sequentially comprises a shaping sand making machine, a third vibrating screen and a powder selecting system, the shaping sand making machine is respectively connected with the first aggregate bin and the second aggregate bin, finished product machine-made sand and stone powder are selected through the powder selecting system, and the stone powder is conveyed to the powder bin.

Description

Technical Field

[0001] The utility model belongs to the technical field of preparing machine-made sand, and specifically relates to a production line for preparing machine-made sand by utilizing construction waste. Background Art

[0002] Fine aggregate, commonly known as sand, is an essential component of building materials such as concrete and mortar. It refers to aggregate with a particle size of 4.75mm or less, commonly known as sand. Sand is categorized by its source: natural sand and manufactured sand. Natural sand is rock particles with a particle size of less than 4.75mm, formed through natural weathering, water transport, sorting, and accumulation. Manufactured sand is a general term for machine-made sand and mixed sand that has undergone soil removal. Natural sand is a local resource that is non-renewable and unsuitable for long-distance transportation. However, as my country's infrastructure construction scale continues to expand, the amount of sand used in construction is also increasing. Therefore, manufactured sand is gradually replacing natural sand as a source of construction sand.

[0003] Construction waste refers to waste materials generated during construction due to human or natural factors, including waste slag, abandoned soil, silt, and discarded materials. The vast majority of this waste is transported to suburban areas or rural areas by construction companies without any treatment, where it is dumped in open-air piles or landfilled. This consumes significant construction costs, including land acquisition fees and waste removal costs. Furthermore, the spillage, dust, and sand flying during the removal and stacking process cause serious environmental pollution. Therefore, the comprehensive utilization of construction waste is a technical issue that technical personnel in this field urgently need to address. Utility Model Content

[0004] In view of the various deficiencies of the existing technology, a production line for preparing machine-made sand from construction waste is proposed to solve the technical problem that the existing technology cannot comprehensively utilize construction waste.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A production line for preparing machine-made sand from construction waste, comprising a raw material crushing system, a screening system, and a sand making system. The raw material crushing system sequentially comprises a plate chain feeder, a jaw crusher, and an impact crusher, with a first iron remover disposed between the jaw crusher and the impact crusher.

[0007] The screening system includes a first vibrating screen and a second vibrating screen. The raw materials crushed by the impact crusher are transported to the first vibrating screen. The first vibrating screen is connected to a first aggregate bin and the second vibrating screen respectively. The second vibrating screens are connected to different second aggregate bins respectively.

[0008] The sand making system includes a shaping sand making machine, a third vibrating screen and a powder selection system in sequence. The shaping sand making machine is connected to the first aggregate bin and the second aggregate bin respectively. The powder selection system selects finished machine-made sand and stone powder, and the stone powder is transported to the powder bin.

[0009] The technical solution is further configured such that the feed end of the jaw crusher is connected to the discharge end of the plate chain feeder, the discharge end of the jaw crusher is provided with a first dust collector and a first conveying channel, and the end of the first conveying channel is provided with a fourth vibrating screen.

[0010] The technical solution is further configured such that the first conveying channel is provided with the first iron remover and a manual sorting platform.

[0011] The technical solution is further configured such that the undersize material of the fourth vibrating screen is transported to the waste soil box through a third transport channel, and the oversize material is transported to the first vibrating screen.

[0012] The technical solution is further configured such that a vibrating feeder is provided between the end of the first conveying channel and the fourth vibrating screen, a first light material separator is provided at the vibrating feeder, and the first light material separator is respectively connected to the light material waste box and the impact crusher.

[0013] The present technical solution is further configured as follows: a second iron remover is provided between the impact crusher and the first vibrating screen; the first vibrating screen is provided with a double-layer screen surface; the screened material of the lower layer is conveyed to the first aggregate bin; the screened material of the middle layer is conveyed to the second vibrating screen; and the screened material of the upper layer is conveyed in reverse to the impact crusher through a seventh conveying channel.

[0014] The technical solution is further configured such that a second light material separator is provided on the seventh conveying channel, and a second dust collector is provided between the impact crusher and the first light material separator.

[0015] The present technical solution is further configured as follows: a third light material separator is provided between the first vibrating screen and the second vibrating screen; the second vibrating screen is provided with a double-layer screen surface; the screened material of the lower layer is conveyed to the second aggregate bin a; the screened material of the middle layer is conveyed to the second aggregate bin b; and the screened material of the upper layer is conveyed to the second aggregate bin c.

[0016] The technical solution is further configured such that the feed end of the shaping sand making machine is connected to the feeding port, the feeding port is configured as a conical structure, and an openable and closable cover is provided at the feeding port.

[0017] The beneficial effects of the utility model are:

[0018] Crushing, screening and sorting construction waste as recycled aggregate allows solid waste to be reused; using the screening system to screen out recycled aggregates of different particle sizes and transport them to aggregate silos separately, it can better meet production needs and has strong adaptability; using recycled aggregates to process into machine-made sand, it replaces natural sand as a source of construction sand. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0020] In the attached figure: 1. Feed bin; 2. Plate chain feeder; 3. Jaw crusher; 4. First dust collector; 5. First iron remover; 6. First conveying channel; 7. Manual sorting table; 8. Waste soil box; 9. Light material waste box; 10. Vibrating feeder; 11. First light material sorter; 12. Second dust collector; 13. Fifth conveying channel; 14. Impact crusher; 15. Fourth vibrating screen; 16. Third conveying channel; 17. Eighth dust collector; 18. Second conveying channel; 19. Third dust collector; 20. Fourth conveying channel; 21. First vibrating screen; 22. Seventh conveying channel; 23. Second light material separator; 24. Sixth conveying channel; 25. Second iron remover; 26. Third light material separator; 27. Second vibrating screen; 28. Ninth conveying channel; 29. Fourth dust collector; 30. Fifth dust collector; 31. Eighth conveying channel; 32. Tenth conveying channel; 33. Eleventh conveying channel; 34. Twelfth conveying channel; 35. Feeding port; 36. Shaping sand making machine; 37. Third vibrating screen; 38. Powder selection system; 39. Powder silo; 40. Thirteenth conveying channel; 41. Fourteenth conveying channel; 42. Sixth dust collector; 43. Seventh dust collector;

[0021] Figure 1 The arrows in the middle indicate the conveying directions of the various conveying channels. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solution of the present invention, the following is a clear and complete description of the technical solution of the present invention in conjunction with the drawings of the present invention. Based on the embodiments in this application, other similar embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of this application. In addition, the directional terms mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only referenced to the directions of the drawings. Therefore, the directional terms used are used to illustrate rather than limit the invention.

[0023] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0024] According to the embodiment of the present invention, a production line for preparing machine-made sand from construction waste is provided. Figure 1 , including a raw material crushing system, a screening system and a sand making system, the raw material crushing system sequentially includes a plate chain feeder 2, a jaw crusher 3 and an impact crusher 14, and a first iron remover 5 is provided between the jaw crusher 3 and the impact crusher 14;

[0025] The screening system includes a first vibrating screen 21 and a second vibrating screen 27. The raw materials crushed by the impact crusher 14 are transported to the first vibrating screen 21. The first vibrating screen 21 is connected to a first aggregate bin and the second vibrating screen 27 respectively. The second vibrating screen 27 is connected to different second aggregate bins respectively.

[0026] The sand making system includes a shaping sand making machine 36, a third vibrating screen 37 and a powder selection system 38 in sequence. The shaping sand making machine 36 is connected to the first aggregate bin and the second aggregate bin respectively. The powder selection system 38 selects finished machine-made sand and stone powder, and the stone powder is transported to the powder bin 39.

[0027] It should be noted that crushing, screening and sorting construction waste as recycled aggregate allows solid waste to be reused; using a screening system to screen out recycled aggregates of different particle sizes and transporting them to aggregate silos separately can better meet production needs and has strong adaptability; recycled aggregates are processed into machine-made sand to replace natural sand as a source of construction sand.

[0028] In this embodiment, the production line for making machine-made sand from construction waste is shown in Figure 1 The feed end of the plate chain feeder 2 is provided with a feed bin 1, the feed end of the jaw crusher 3 is connected to the discharge end of the plate chain feeder 2, the discharge end of the jaw crusher 3 is provided with a first dust collector 4 and a first conveying channel 6, and the end of the first conveying channel 6 is provided with a fourth vibrating screen 15.

[0029] It should be noted that installing dust collectors at relevant dust-generating points can achieve efficient recycling of construction waste while reducing dust and being more environmentally friendly.

[0030] In this embodiment, the production line for making machine-made sand from construction waste is shown in Figure 1 The first conveying channel 6 is provided with the first iron remover 5 and the manual sorting platform 7.

[0031] It should be noted that the first iron remover 5 is used to remove metal, and the manual sorting table 7 is used to sort wood, rubber, woven fabrics, leather, etc.

[0032] In this embodiment, the production line for making machine-made sand from construction waste is shown in Figure 1The undersize material of the fourth vibrating screen 15 is transported to the waste soil box 8 through the third conveying channel 16 , and the oversize material is transported to the first vibrating screen 21 .

[0033] It should be noted that the fourth vibrating screen 15 removes dirt from the raw material, which is then transported via the third conveying channel 16 to the waste soil box 8 for backfilling. The oversize material from the fourth vibrating screen 15 is transported via the fourth conveying channel 20 to the first vibrating screen 21. Furthermore, an eighth dust collector 17 is installed at the fourth vibrating screen 15.

[0034] In this embodiment, the production line for making machine-made sand from construction waste is shown in Figure 1 A vibrating feeder 10 is provided between the end of the first conveying channel 6 and the fourth vibrating screen 15. A first light material separator 11 is provided at the vibrating feeder 10. The first light material separator 11 is respectively connected to the light material waste box 9 and the impact crusher 14.

[0035] It should be noted that the bulk material output by the vibrating feeder 10 is conveyed to the impact crusher 14 via the fifth conveying channel 13. The fifth conveying channel 13 is provided with a first light material separator 11 and a second dust collector 12. The first light material separator 11 uses wind power to separate light materials such as paper, plastic, and wood chips from the bulk material, reducing the impurity content in the aggregate and improving the cleanliness of the aggregate. The separated light materials are conveyed to the light material waste bin 9. The medium-sized material output by the vibrating feeder 10 is conveyed to the fourth vibrating screen 15 via the second conveying channel 18.

[0036] In this embodiment, the production line for making machine-made sand from construction waste is shown in Figure 1 A second iron remover 25 is provided between the impact crusher 14 and the first vibrating screen 21. The first vibrating screen 21 is provided with a double-layer screen surface, the lower layer screened material is conveyed to the first aggregate bin, the middle layer screened material is conveyed to the second vibrating screen 27, and the upper layer screened material is conveyed back to the impact crusher 14 through the seventh conveying channel 22.

[0037] It should be noted that the impact crusher 14 is provided with a third dust collector 19 , and the raw materials crushed and output by the impact crusher 14 are conveyed to the first vibrating screen 21 through a sixth conveying channel 24 , wherein the sixth conveying channel 24 is provided with a second iron remover 25 .

[0038] The lower layer of the first vibrating screen 21 is conveyed to the first aggregate silo via the eighth conveying channel 31. The aggregate particle size in the first aggregate silo is 0-5 mm. The middle layer of the first vibrating screen 21 is conveyed to the second vibrating screen 27 via the ninth conveying channel 28. The ninth conveying channel 28 is equipped with a third light material separator 26 and a fourth dust collector 29. The upper layer of the first vibrating screen 21 is conveyed back to the impact crusher 14 via the seventh conveying channel 22 for further crushing. The seventh conveying channel 22 is equipped with a second light material separator 23.

[0039] In this embodiment, the production line for making machine-made sand from construction waste is shown in Figure 1 The second vibrating screen 27 is provided with a double-layer screen surface, the lower layer screened material is transported to the second aggregate bin a, the middle layer screened material is transported to the second aggregate bin b, and the upper layer screened material is transported to the second aggregate bin c.

[0040] It should be noted that the feed end of the second vibrating screen 27 is equipped with a fifth dust collector 30. The lower layer of the second vibrating screen 27 is transported to the second aggregate bin a via the tenth conveying channel 32. The aggregate particle size in the second aggregate bin a is 5-10 mm. The middle layer of the second vibrating screen 27 is transported to the second aggregate bin b via the eleventh conveying channel 33. The aggregate particle size in the second aggregate bin b is 10-20 mm. The upper layer of the second vibrating screen 27 is transported to the second aggregate bin c via the twelfth conveying channel 34. The aggregate particle size in the second aggregate bin c is 20-31.5 mm.

[0041] In this embodiment, the production line for making machine-made sand from construction waste is shown in Figure 1 The feeding end of the shaping sand making machine 36 is connected to the feeding port 35, and the feeding port 35 is set to a conical structure. The feeding port 35 is provided with an openable and closable cover.

[0042] It should be noted that aggregates of different particle sizes are used to produce machine-made sand of different specifications. A mounting shaft is provided at the first end of the cover plate. A gear is provided on the mounting shaft. The gear meshes with the output gear of the rotating motor. The forward and reverse rotation of the rotating motor drives the cover plate to rotate clockwise and counterclockwise, achieving opening and closing.

[0043] A thirteenth conveying channel 40 is arranged between the feeding port 35 and the shaping sand maker 36, and a fourteenth conveying channel 41 is arranged between the shaping sand maker 36 and the third vibrating screen 37, wherein a sixth dust collector 42 is arranged at the shaping sand maker 36, and a seventh dust collector 43 is arranged at the third vibrating screen 37.

[0044] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not limit the scope of implementation of the present invention. All equivalent changes and modifications made within the scope of this application should still fall within the scope of the present invention.

Claims

1. A production line for preparing machine-made sand from construction waste, characterized in that: It includes a raw material crushing system, a screening system and a sand making system. The raw material crushing system includes a plate chain feeder, a jaw crusher and an impact crusher in sequence. A first iron remover is provided between the jaw crusher and the impact crusher. The screening system includes a first vibrating screen and a second vibrating screen. The raw materials crushed by the impact crusher are transported to the first vibrating screen. The first vibrating screen is connected to a first aggregate bin and the second vibrating screen respectively. The second vibrating screens are connected to different second aggregate bins respectively. The sand making system includes a shaping sand making machine, a third vibrating screen and a powder selection system in sequence. The shaping sand making machine is connected to the first aggregate bin and the second aggregate bin respectively. The powder selection system selects finished machine-made sand and stone powder, and the stone powder is transported to the powder bin.

2. The production line for preparing machine-made sand from construction waste according to claim 1, characterized in that: The feed end of the jaw crusher is connected to the discharge end of the plate chain feeder. The discharge end of the jaw crusher is provided with a first dust collector and a first conveying channel. The end of the first conveying channel is provided with a fourth vibrating screen.

3. The production line for preparing machine-made sand from construction waste according to claim 2, characterized in that: The first conveying channel is provided with the first iron remover and a manual sorting platform.

4. The production line for preparing machine-made sand from construction waste according to claim 2, characterized in that: The undersize material of the fourth vibrating screen is transported to the waste soil box through the third transport channel, and the oversize material thereof is transported to the first vibrating screen.

5. The production line for preparing machine-made sand from construction waste according to claim 2, characterized in that: A vibrating feeder is provided between the end of the first conveying channel and the fourth vibrating screen. A first light material separator is provided at the vibrating feeder. The first light material separator is respectively connected to a light material waste box and the impact crusher.

6. The production line for preparing machine-made sand from construction waste according to claim 5, characterized in that: A second iron remover is provided between the impact crusher and the first vibrating screen. The first vibrating screen is provided with a double-layer screen surface. The screened material of the lower layer is conveyed to the first aggregate bin, the screened material of the middle layer is conveyed to the second vibrating screen, and the screened material of the upper layer is conveyed back to the impact crusher through the seventh conveying channel.

7. The production line for preparing machine-made sand from construction waste according to claim 6, characterized in that: A second light material separator is provided on the seventh conveying channel, and a second dust collector is provided between the impact crusher and the first light material separator.

8. The production line for preparing machine-made sand from construction waste according to claim 6, characterized in that: A third light material separator is arranged between the first vibrating screen and the second vibrating screen. The second vibrating screen is provided with a double-layer screen surface. The screened material of the lower layer is transported to the second aggregate bin a, the screened material of the middle layer is transported to the second aggregate bin b, and the screened material of the upper layer is transported to the second aggregate bin c.

9. The production line for preparing machine-made sand from construction waste according to claim 1, characterized in that: The feed end of the shaping sand making machine is connected to the feeding port, the feeding port is configured as a conical structure, and an openable and closable cover is provided at the feeding port.

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