A highway pebble crushing aggregate intelligent green production system

Abstract

The present application relates to pebble breaking technical field, especially to a kind of intelligent green production system of highway pebble breaking aggregate, including sorting unit;The pebbles in pebble heap and sundries are preliminarily sorted in the sorting unit;Coarse crushing unit;The coarse crushing unit is docked with sorting unit and first screen water washing unit;Coarse material fine crushing unit;The coarse material fine crushing unit is docked with first screen water washing unit and second screen water washing unit;Fine material whole shaping unit;The fine material whole shaping unit is docked with second screen water washing unit and third screen water washing unit;Third screen water washing unit is docked with stock car room, and finished product pebble aggregate after removing impurities is respectively conveyed to different stacking area of stock car room according to the size of particle size.The system not only can break and process pebble into different particle size, but also can remove impurities, so that broken pebble can be directly applied in concrete, and good technical, economic and social benefits are achieved.

Description

Technical Field

[0001] This invention relates to the field of gravel crushing technology, and in particular to an intelligent and green production system for gravel crushing aggregates for highways. Background Technology

[0002] With the rapid development of the construction industry, the demand for stone in construction is constantly increasing. At the same time, due to environmental protection, the mining of crushed stone required by the construction industry is restricted. Compared with crushed stone that can only be obtained through mining, pebble resources are abundant in riverbeds and on the surface. However, due to the smooth surface of pebbles, they have poor workability when used in building concrete construction, making them difficult to construct. In addition, the generally larger particle size of pebbles generally results in concrete with lower strength than concrete produced from crushed stone, so they cannot be used directly and need to be crushed.

[0003] Current stone crushing methods typically involve feeding stones into a large crusher for crushing. While this method is simple, it produces stones of varying sizes and containing numerous impurities. Some crushed stones still have smooth surfaces, requiring the addition of a certain amount of gravel to meet concrete mix requirements when used directly in the construction industry. This complicates construction and prevents the large-scale direct application of pebbles in building construction.

[0004] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is the closest prior art. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an intelligent and green production system for crushed aggregates of highway pebbles. This system can not only crush and process pebbles into different particle sizes to meet the needs of various projects, but also be directly applied to concrete, achieving good technical, economic and social benefits.

[0006] To achieve the aforementioned objective, the technical solution of the present invention is implemented as follows: an intelligent and green production system for crushing and aggregating gravel for highways, comprising...

[0007] Sorting unit; the sorting unit performs preliminary sorting of pebbles and debris in the pebble pile;

[0008] The coarse crushing unit is connected to the sorting unit to perform preliminary crushing on the pebbles selected by the sorting unit and to produce coarse crushed pebble aggregate. The coarse crushing unit is connected to the first screening and washing unit to remove impurities from the coarse crushed pebble aggregate.

[0009] The coarse and fine crushing unit is connected to the first screening and washing unit to perform secondary crushing on the coarse gravel aggregate after removing impurities, and to produce fine gravel aggregate. The coarse and fine crushing unit is connected to the second screening and washing unit to remove impurities from the fine gravel aggregate.

[0010] The fine material shaping unit is connected to the second screening and washing unit to crush and shape the fine gravel aggregate after removing impurities, and to produce finished gravel aggregate. The fine material shaping unit is also connected to the third screening and washing unit that removes the finished gravel aggregate. The third screening and washing unit is connected to the stockpiling workshop and transports the finished gravel aggregate after removing impurities to different stockpiling areas of the stockpiling workshop according to the particle size.

[0011] A filter press unit; the filter press unit is connected to the first screening and washing unit, the second screening and washing unit and the third screening and washing unit, and is used to receive and filter the wastewater discharged from the first screening and washing unit, the second screening and washing unit and the third screening and washing unit.

[0012] Preferably, the coarse crushing unit includes a bar feeder and a first crusher; the bar feeder is connected to the sorting unit and uniformly conveys the pebbles sorted by the sorting unit to the first crusher; the opening of the first crusher is set to 80mm, and the discharge port of the first crusher is connected to the coarse material conveyor belt that conveys the coarse pebble aggregate; the first screening and washing unit includes a first vibrating screen and a first sand washing machine; the first vibrating screen is connected to the coarse material conveyor belt and screens the natural sand in the received coarse pebble aggregate, and the discharge end of the first vibrating screen is connected to the first sand washing machine; the first sand washing machine washes the stone powder in the coarse pebble aggregate.

[0013] Preferably, the coarse and fine crushing unit includes a second crusher and a fine material conveyor belt for conveying fine gravel aggregate; the second crusher is connected to the discharge port of the first sand washing machine, and the opening of the second crusher is set to 40mm, and the discharge port of the second crusher is connected to one end of the fine material conveyor belt; the second screening and washing unit includes a second vibrating screen and a second sand washing machine; the second vibrating screen is connected to the other end of the fine material conveyor belt and screens the natural sand in the received fine gravel aggregate, and the discharge end of the second vibrating screen is connected to the second sand washing machine; the second sand washing machine washes the stone powder in the fine gravel aggregate.

[0014] Preferably, the fine material shaping unit includes a shaping crusher and a finished product conveyor belt for conveying finished pebble aggregate; the shaping crusher is connected to the second sand washing machine, and the inlet of the shaping crusher is set to 30mm, and the outlet of the shaping crusher is connected to one end of the finished product conveyor belt.

[0015] The third screening and washing unit includes a third vibrating screen and a third sand washing machine. The third vibrating screen is connected to the other end of the finished product conveyor belt and screens the natural sand in the received finished pebble aggregate. The discharge end of the third vibrating screen is connected to the third sand washing machine. The third sand washing machine washes the stone powder in the finished pebble aggregate. A finished product classification vibrating screen is provided at the connection between the third sand washing machine and the stockpiling workshop. One end of the finished product classification vibrating screen is connected to the third sand washing machine, and the other end is connected to the stockpiling workshop.

[0016] Preferably, the filter press unit includes a wastewater receiving pipe and a filter press; the wastewater receiving pipe is connected to the discharge ports of the first sand washing machine, the second sand washing machine and the third sand washing machine, and the wastewater in the wastewater receiving pipe is introduced into the filter press.

[0017] Preferably, the first, second, and third vibrating screens are all synchronous block eccentric circular vibrating screens, and the screen hole diameters of the first, second, and third vibrating screens are all 5mm; the finished product sorting vibrating screen is provided with three layers of screens, the screen hole diameters of the three layers of screens are 30mm, 20mm, and 10mm respectively, and the three layers of screens are arranged in parallel from top to bottom in the vertical direction according to the order of decreasing screen hole diameter.

[0018] Preferably, it also includes finished product sorting conveyor belts; there are at least three finished product sorting conveyor belts, and each finished product sorting conveyor belt is connected to the discharge port of the three layers of screens of the finished product sorting vibrating screen.

[0019] Preferably, the sorting unit includes a feeding conveyor belt and a loader; the loader transports the pebbles from the pebble pile to the feed end of the feeding conveyor belt, and the discharge end of the feeding conveyor belt is connected to the bar feeder.

[0020] Preferably, it also includes a natural sand washing conveyor belt, which transports the natural sand screened by the first vibrating screen, the second vibrating screen and the third vibrating screen to the third sand washing machine.

[0021] Preferably, the first crusher is a jaw crusher; the second crusher is a cone crusher; the shaping crusher is an impact crusher; and the filter press is a slurry filter press.

[0022] The beneficial effects of this invention are reflected in:

[0023] (1) This invention involves crushing natural pebbles three times with different requirements, and after each crushing, the pebble aggregate is screened and washed to remove impurities such as natural sand and stone powder. This setup not only gradually reduces the particle size of the pebbles with each crushing, but also improves the crushing rate compared to traditional single-stage crushing, resulting in a cubic shape for the crushed pebbles. Furthermore, the crushed pebbles are free of internal cracks and have high compressive strength, closely resembling the crushed stone used in existing concrete materials. Simultaneously, this also results in a low content of needle-like or flaky pebbles in the finished aggregate, allowing for direct application in concrete of different specifications, thereby increasing the utilization rate of pebbles in concrete.

[0024] (2) By setting up a filter press unit, the present invention enables the stone powder and impurities in the crushed pebble aggregate to be pressed into block solids by the mud-water filter press in the filter press unit after each crushing, thus achieving zero emissions and improving the environmental friendliness of the present invention.

[0025] (3) The pebble crushing and washing system of the present invention not only improves the utilization rate of pebbles in concrete, but also effectively reduces the methylene blue value, mud content, and powder content in the crushed pebble aggregate. This results in better overall gradation of the crushed pebble aggregate, expanding the application scope of pebble aggregate in the construction field. Attached Figure Description

[0026] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0027] Figure 1 A flowchart illustrating the system operation of this invention is provided. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0030] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, "multiple" refers to two or more. Moreover, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0031] Example 1

[0032] See Figure 1 As shown:

[0033] This invention provides an intelligent and green production system for crushing and aggregating gravel for highways, comprising a sorting unit, a coarse crushing unit, a coarse and fine crushing unit, and a fine shaping unit.

[0034] The sorting unit typically consists of a feeding conveyor belt and a loader, while the coarse and fine crushing unit consists of a bar feeder and a first crusher. The feeding conveyor belt is connected to the bar feeder, which in turn is connected to the first crusher, which is a jaw crusher.

[0035] In actual operation, operators use a loader to move the gravel pile onto the conveyor belt. The operators then perform preliminary sorting of the gravel and place it onto the conveyor belt. During sorting, the operators primarily separate impurities such as wood and garbage mixed in with the gravel. The conveying speed of the bar feeder is adjusted to ensure the gravel enters the first crusher at a uniform speed. Furthermore, the bar spacing of the bar feeder is adjusted to pre-separate the soil and fine materials contained within the gravel before feeding it into the jaw crusher, allowing the jaw crusher to achieve its maximum crushing capacity during operation.

[0036] The jaw crusher has an opening of 80mm, meaning that after the pebbles are crushed by the jaw crusher, they become coarse gravel aggregate with a particle size of less than 80mm.

[0037] It also includes a first screening and washing unit; the first screening and washing unit consists of a first vibrating screen and a first sand washing machine, and the first vibrating screen is a synchronous block eccentric circular vibrating screen.

[0038] After the jaw crusher crushes the large-diameter pebbles into coarse pebble aggregate, the coarse pebble aggregate is conveyed to the first vibrating screen by a conveyor belt. The diameter of the screen openings of the first vibrating screen is 5mm or less, which can screen out the natural sand in the coarse pebble aggregate. The remaining larger-diameter coarse pebble aggregate is fed into the first sand washing machine. The first sand washing machine washes out impurities such as stone powder from the coarse pebble aggregate with water, and then introduces the washed coarse pebble aggregate into the coarse-fine crushing unit.

[0039] It also includes a second screening and washing unit, which consists of a second vibrating screen and a second sand washing machine. The second vibrating screen is a synchronous block eccentric circular vibrating screen with a screen hole diameter of 5mm.

[0040] The coarse and fine crushing unit consists of a second crusher and a fine material conveyor belt, and the second crusher is a cone crusher.

[0041] The second crusher is connected to the discharge port of the first sand washing machine, and the opening of the second crusher is set to 40mm. The discharge port of the second crusher is connected to one end of the fine material conveyor belt.

[0042] Through secondary crushing, the original coarse gravel aggregate with a particle size of 80mm is crushed into fine gravel aggregate with a particle size of about 40mm. Because natural sand, stone powder, and impurities are removed from the coarse gravel aggregate before crushing, no stone powder or impurities interfere with the cone crusher during the crushing process. This allows as many pebbles as possible to be crushed again, resulting in more thorough crushing and improving the gravel crushing rate.

[0043] The second vibrating screen is connected to the other end of the fine material conveyor belt, which transports the fine gravel aggregate to the second vibrating screen. The second vibrating screen screens the natural sand in the received fine gravel aggregate. The discharge end of the second vibrating screen is connected to the second sand washing machine, which washes the stone powder and impurities in the fine gravel aggregate with water.

[0044] The fine material shaping unit consists of a shaping crusher and a finished product conveyor belt. The shaping crusher is connected to the second sand washing machine, and the inlet of the shaping crusher is set to 30mm. The discharge port of the shaping crusher is connected to one end of the finished product conveyor belt. The shaping crusher is an impact crusher.

[0045] Through a third crushing and shaping process, the original fine pebble aggregate with a particle size of about 40mm is crushed into finished pebble aggregate with a particle size of about 30mm.

[0046] Because natural sand, stone powder, and impurities are removed from the fine gravel aggregate before crushing, the impact crusher can effectively crush and shape the surface of the gravel. This results in a smoother surface and, after a third crushing and shaping process, the gravel becomes cubic in shape, free of internal cracks, and exhibits high compressive strength, closely resembling the crushed stone used in existing concrete materials. Simultaneously, this process reduces the content of needle-like or flaky gravel in the finished aggregate, increasing the utilization rate of gravel in concrete.

[0047] It also includes a third screening and washing unit, which consists of a third vibrating screen and a third sand washing machine. The third vibrating screen is a synchronous block eccentric circular vibrating screen with a screen hole diameter of 5mm.

[0048] The third vibrating screen is connected to the other end of the finished product conveyor belt. The finished product conveyor belt transports the washed finished pebble aggregate to the third vibrating screen. The third vibrating screen screens the natural sand in the received finished pebble aggregate, and the discharge end of the third vibrating screen is connected to the third sand washing machine.

[0049] The third sand washing machine washes the stone powder in the finished pebble aggregate with water. The connection between the third sand washing machine and the stockpiling workshop is equipped with a finished product classification vibrating screen. One end of the finished product classification vibrating screen is connected to the third sand washing machine, and the other end is connected to the stockpiling workshop.

[0050] The finished product sorting vibrating screen has three layers of screens with mesh diameters of 30mm, 20mm, and 10mm respectively. The three layers are arranged parallel to each other vertically from top to bottom in descending order of mesh diameter. It also includes at least three finished product sorting conveyor belts, each connected to the discharge port of one of the three layers of screens.

[0051] The finished product sorting conveyor belt transports the finished pebble aggregate, after removing impurities, to different stacking areas in the stockpiling workshop according to the particle size.

[0052] It also includes a filter press unit, which consists of a wastewater receiving pipe and a filter press, which is a sludge filter press.

[0053] The wastewater receiving pipe is connected to the discharge outlets of the first, second, and third sand washing machines, and the wastewater in the receiving pipe is introduced into the filter press. The sludge filter press compresses the stone powder and impurities in the wastewater into blocks, thereby achieving zero discharge of the entire system.

[0054] It also includes a natural sand washing conveyor belt, which transports the natural sand screened by the first, second and third vibrating screens to the third sand washing machine.

[0055] The washed gravel aggregate was screened using a finished product classification vibrating screen to select crushed pebbles of 20-30mm, 10-20mm, and 10-5mm. Furthermore, after three rounds of crushing and washing, the finished gravel aggregate had a mud content of 0.3%-0.5%, a crushing value of 7%-10%, and good gradation, thus expanding the application range of gravel aggregate in the construction field.

[0056] After being screened by the first, second, and third vibrating screens and then washed with water, the fineness modulus of the finished sand can be controlled at 2.6-2.9, the methylene blue value at 0.6-1.0 g / kg, and the dust content at 5%-7%. The mud and dust content in the washed natural sand is significantly reduced compared to the finished product from existing sand making processes, which is beneficial for the direct application of natural sand in more construction scenarios.

[0057] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A highway pebble crushing aggregate intelligent green production system, characterized in that, The utility model relates to a kind of river gravel processing system, including: Sorting unit; The pebbles in the pebble heap and sundries are preliminarily sorted by the sorting unit; Coarse crushing unit; The coarse crushing unit is connected with the sorting unit, and the selected pebbles of the sorting unit are preliminarily broken, and coarse crushed pebble aggregate is prepared, and the coarse crushing unit is connected with the first screening and washing unit for removing impurities in coarse crushed pebble aggregate; The coarse crushing unit includes a rod bar feeder and a first crusher;The rod bar feeder is connected with the sorting unit, and the sorted pebbles of the sorting unit are uniformly transported to the first crusher;The opening of the first crusher is set to 80mm, and the discharge port of the first crusher is connected with the coarse material conveying belt for conveying coarse material pebble aggregate; The first screening and washing unit includes a first vibrating screen and a first sand washer;The first vibrating screen is connected with the coarse material conveying belt, and the natural sand in the received coarse material pebble aggregate is screened, and the discharge end of the first vibrating screen is connected with the first sand washer; The first sand washer washes the stone powder in the coarse material pebble aggregate; Coarse material fine crushing unit;The coarse material fine crushing unit is connected with the first screening and washing unit, and the coarse crushed pebble aggregate after removing impurities is broken again, and fine crushed pebble aggregate is prepared, and the coarse material fine crushing unit is connected with the second screening and washing unit for removing impurities in fine crushed pebble aggregate; The coarse material fine crushing unit includes a second crusher and a fine material conveying belt for conveying fine material pebble aggregate;The second crusher is connected with the discharge port of the first sand washer, and the opening of the second crusher is set to 40mm, and the discharge port of the second crusher is connected with one end of the fine material conveying belt; The second screening and washing unit includes a second vibrating screen and a second sand washer;The second vibrating screen is connected with the other end of the fine material conveying belt, and the natural sand in the received fine material pebble aggregate is screened, and the discharge end of the second vibrating screen is connected with the second sand washer; The second sand washer washes the stone powder in the fine material pebble aggregate; Fine material shaping unit;The fine material shaping unit is connected with the second screening and washing unit, and the fine crushed pebble aggregate after removing impurities is broken and shaped, and finished pebble aggregate is prepared, and the fine material shaping unit is connected with the third screening and washing unit for removing finished pebble aggregate; The third screening and washing unit is connected with the stock yard, and the finished pebble aggregate after removing impurities is conveyed to different stacking areas of the stock yard according to particle size; The fine material shaping unit includes a shaping crusher and a finished product conveying belt for conveying finished pebble aggregate;The shaping crusher is connected with the second sand washer, and the inlet of the shaping crusher is set to 30mm, and the discharge port of the shaping crusher is connected with one end of the finished product conveying belt; The third screening and washing unit includes a third vibrating screen and a third sand washer;The third vibrating screen is connected with the other end of the finished product conveying belt, and the natural sand in the received finished pebble aggregate is screened, and the discharge end of the third vibrating screen is connected with the third sand washer; The third sand washer washes the stone powder in the finished pebble aggregate, and a finished product classification vibrating screen is arranged at the connection between the third sand washer and the stock yard, one end of the finished product classification vibrating screen is connected with the third sand washer, and the other end is connected with the stock yard. The pressure filtration unit is connected with the first, second and third screen water washing units and is used for receiving and filtering the sewage discharged by the first, second and third screen water washing units.

2. The intelligent green production system for highway pebble breaking and collecting according to claim 1, characterized in that, The pressure filtration unit comprises a sewage receiving pipe and a pressure filter, the sewage receiving pipe is communicated with the sewage discharge ports of the first, second and third sand washing machines, and the sewage in the sewage receiving pipe is introduced into the pressure filter.

3. The intelligent and green production system for highway pebble crushing aggregates according to claim 2, characterized in that, The first, second and third vibrating screens are synchronous block eccentric circular vibrating screens, and the screen hole diameters of the first, second and third vibrating screens are all 5 mm; the finished product classification vibrating screen is provided with three layers of screen meshes, the mesh hole diameters of the three layers of screen meshes are 30 mm, 20 mm and 10 mm respectively, and the three layers of screen meshes are arranged in parallel along the vertical direction from top to bottom in the order of the mesh hole diameters from large to small.

4. The intelligent green production system for highway pebble breaking and collecting according to claim 3, characterized in that, The finished product classification conveying belt comprises at least three finished product classification conveying belts, and the finished product classification conveying belts are respectively connected with the discharge ports of the three layers of screen meshes of the finished product classification vibrating screen.

5. The intelligent green production system for highway pebble breaking and collecting according to claim 4, characterized in that, The sorting unit comprises a feeding conveyor belt and a forklift, the forklift transports the pebbles in the pebble pile to the feeding end of the feeding conveyor belt, and the discharge end of the feeding conveyor belt is connected with the rod bar feeder.

6. The intelligent green production system for highway pebble breaking and collecting according to claim 5, characterized in that, The natural sand water washing conveying belt is further provided, and the natural sand water washing conveying belt conveys the natural sand screened by the first, second and third vibrating screens to the third sand washing machine.

7. The intelligent green production system for highway pebble breaking and collecting according to claim 6, characterized in that, The first crusher is an eccentric crusher, the second crusher is a cone crusher, the shaping crusher is an impact crusher, and the pressure filter is a slurry pressure filter.

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