Graded broken stone crushing value control device and method

Abstract

The invention relates to the technical field of graded broken stone sorting, in particular to a graded broken stone crushing value control device and method. The graded broken stone crushing value control device comprises a needle-sheet-shaped control screen, an image recognition and discrimination lithology module, a blowing system air source, a blowing system, a qualified crushing value graded broken stone channel, an unqualified crushing value graded broken stone channel and a control system. Primary screening is performed through the needle-sheet-shaped control screen, and sorting of graded broken stones with qualified crushing values and graded broken stones with unqualified crushing values is completed through cooperation of the image recognition and judgment lithology module, the injection system and the control system.

Description

Technical Field

[0001] The invention relates to the technical field of graded crushed stone sorting, and in particular to a device and method for controlling a crushing value of graded crushed stone. Background Art

[0002] The crushing value of graded crushed stone refers to the ability of graded crushed stone to resist crushing after pressure is applied to the graded crushed stone under specified test conditions. This indicator is obtained by layering and screening the coarse aggregate graded crushed stone samples after the graded crushed stone test to be tested through a specific test method (such as "GBT14685-2022 Crushed Stone and Pebbles for Construction"), and then calculating the weight percentage of each graded aggregate passing through the sieve hole based on the screening results. A quantitative value. The crushing value of graded crushed stone is an important indicator for measuring the quality of crushed stone. It reflects the strength, stability and durability of crushed stone and is one of the important indicators for evaluating the quality of crushed stone. The size of the crushing value directly affects the concrete strength index. Therefore, by controlling the crushing value, the concrete strength index can be ensured and the quality and performance of the structural layer can be ensured to meet the design requirements.

[0003] In the sand and gravel processing system, the crushing value can be controlled by optimizing the processing technology, such as adjusting the parameters of the crushing equipment, changing the crushing process, etc., to produce graded crushed stone that meets the engineering requirements. In the sand and gravel processing system, raw materials that meet the requirements should be strictly selected, and the crushing value and other indicators should be tested to ensure that the quality of the raw materials meets the engineering requirements. However, the original influencing factors of the crushing value of graded crushed stone are the lithology of the rock, the wet saturated compressive strength index of the rock, etc. In the sand and gravel processing system, especially when the tunnel ballast processing production line is in production, the crushing value of the graded crushed stone does not meet the relevant standards and specifications because of the mixture of weak surrounding rock, cracks, weathered rock and other ballast rocks that do not meet the strength standards.

[0004] In project quality control, the crushing value of graded crushed stone is an important testing indicator. By regularly testing the crushing value of graded crushed stone, quality problems can be discovered in a timely manner and corresponding measures can be taken to deal with them, thereby ensuring the overall quality of the project.

[0005] In summary, there is an urgent need for a device and method for controlling the crushing value of graded crushed stone to solve the problems in the prior art. Summary of the invention

[0006] The present invention aims to provide a device and method for controlling the crushing value of graded crushed stone. The specific technical scheme is as follows:

[0007] A crushing value control device for graded crushed stone, arranged on a sandstone processing system, comprising a needle-shaped control screen, an image recognition and lithology discrimination module, an air source for a blowing system, a blowing system, a graded crushed stone channel with a qualified crushing value, a graded crushed stone channel with an unqualified crushing value, and a control system;

[0008] The needle-shaped control screen is arranged in front of the sand and gravel channel in the sand and gravel processing system, and is used to screen out the thin-flaked graded crushed stones that do not conform to the cubic shape;

[0009] The image recognition and lithology identification module is arranged above the sand and gravel channel, and is used to photograph all graded gravel on the sand and gravel channel and scan and analyze the rock characteristics of the graded gravel to obtain rock characteristic data and position data of the graded gravel;

[0010] The gas source of the spray system is connected to the spray system and is used to provide gas power to the spray system;

[0011] The spraying system is arranged at the end of the sand and gravel channel, and is used to separate the crushed stones with qualified crushing value and graded gravel from the crushed stones with unqualified crushing value and graded gravel;

[0012] The qualified crushing value graded gravel channel is used to transport the qualified crushing value graded gravel;

[0013] The unqualified crushing value and graded gravel channel is used to transport the unqualified crushing value and graded gravel;

[0014] The control system is connected to the image recognition and lithology identification module and the injection system, and is used to receive rock characteristic data and position data and control the injection system to achieve graded crushed stone classification.

[0015] Preferably, the needle-shaped control screen includes a support frame, a screen surface, a screen ring and a vibrator, the support frame is arranged in front of the sand and gravel channel, the screen ring is arranged on the support frame, the screen surface is arranged on the screen ring, and the vibrator is connected to the screen ring.

[0016] Preferably, the sieve surface comprises sieve holes, and the sieve holes are in the shape of long rectangular strips.

[0017] Preferably, the rock characteristics include color, grain shape and lithology.

[0018] Preferably, the gravel channel with qualified crushing value grading is arranged directly below the end of the sand and gravel channel, and the gravel channel with unqualified crushing value grading is arranged beside the gravel channel with qualified crushing value grading and away from the end of the sand and gravel channel.

[0019] In addition, the present invention also discloses a method for controlling the crushing value of graded crushed stone. The method uses the above-mentioned device for controlling the crushing value of graded crushed stone. The steps of the method are as follows:

[0020] The original graded crushed stone falls onto the needle-shaped control screen, which removes the thin-flaked graded crushed stone that does not conform to the cubic shape, and the graded crushed stone that conforms to the shape requirements falls onto the sand and gravel channel;

[0021] The image recognition and lithology identification module scans all graded gravel on the sand and gravel channel, collects rock characteristic data and position data of the graded gravel, and transmits the rock characteristic data and position data to the control system;

[0022] The control system receives rock characteristic data of graded crushed stone, and divides the graded crushed stone into graded crushed stone with qualified crushing value and graded crushed stone with unqualified crushing value according to the rock characteristic data;

[0023] The control system controls the blowing system through the position data of the graded gravel. The blowing system blows the unqualified crushing value graded gravel, so that the unqualified crushing value graded gravel falls into the unqualified crushing value graded gravel channel, and the qualified crushing value graded gravel falls freely from the sand and gravel channel into the qualified crushing value graded gravel channel.

[0024] The application of the technical solution of the present invention has the following beneficial effects:

[0025] The present invention performs a first screening of the original graded crushed stone through a needle-flaky control screen to reduce the needle-flaky rate of the graded crushed stone. The use of graded crushed stone with a lower needle-flaky rate can significantly improve the quality stability of concrete, thereby improving the overall engineering quality. In addition, the present invention uses an image recognition and lithology identification module to divide the graded crushed stone after the first screening into graded crushed stone with qualified crushing value and graded crushed stone with unqualified crushing value, and controls the injection system through a control system to sort the two types of graded crushed stone, thereby reducing the content of crushed stone particles with abnormal color, abnormal particle shape, and abnormal lithology in the graded crushed stone.

[0026] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 2 is a schematic diagram of the structure of a crushing value control device for graded crushed stone in a preferred embodiment of the present invention;

[0029] Figure 2 It is a flow chart of the steps of the method for controlling the crushing value of graded crushed stone in a preferred embodiment of the present invention.

[0030] Among them, 100-needle-shaped control screen, 200-image recognition and lithology identification module, 300-injection system air source, 400-injection system, 500-qualified crushing value and graded gravel channel, 600-unqualified crushing value and graded gravel channel, 700-control system. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] like Figure 1 As shown, this embodiment discloses a graded gravel crushing value control device, which is arranged on a sand and gravel processing system, and the graded gravel crushing value control device includes a needle-shaped control screen 100, an image recognition and lithology determination module 200, an injection system air source 300, a injection system 400, a qualified crushing value graded gravel channel 500, an unqualified crushing value graded gravel channel 600 and a control system 700.

[0033] The needle-shaped control screen 100 is arranged in front of the sand and gravel channel in the sand and gravel processing system to screen out the thin-flaked graded crushed stones that do not conform to the cubic shape; the preferred sand and gravel channel in this embodiment is an inclined conveyor belt.

[0034] The image recognition and lithology identification module 200 is arranged above the sand and gravel channel, and is used to photograph all graded gravel on the sand and gravel channel and scan and analyze the rock characteristics of the graded gravel to obtain rock characteristic data and position data of the graded gravel.

[0035] Specifically, the image recognition and lithology identification module 200 includes an industrial camera, an industrial lens, a light source and an image processing unit. The industrial camera obtains the graded gravel image and sends it to the image processing unit, which processes the graded gravel image. The process is as follows:

[0036] 1) Remove image noise through filtering algorithm;

[0037] 2) Extract the edges of gravel and separate the particles through image segmentation and edge extraction algorithms;

[0038] 3) The color characteristics of gravel are judged by the first binarization threshold, and gravel with different colors are marked, specifically as follows: the image of sandstone is collected by the image recognition and lithology discrimination module 200, and a grayscale histogram is formed by the image processing unit, and the initial first threshold is set to A (A can be obtained through a large amount of data-level analysis), and the value range of A is 0-255. Gravel with a value less than A is qualified gravel, and gravel with a value greater than A is regarded as different color gravel. The value of the first threshold is optimized through continuous learning;

[0039] 4) Calculate the major diameter, minor diameter, centroid and other external features of the gravel, and mark the gravel with an aspect ratio exceeding a preset threshold, as follows: Use the equivalent ellipse major-minor axis method to characterize the shape of the gravel, and the gravel with a major axis to minor axis ratio greater than the second threshold is a needle-shaped particle. In this embodiment, the second threshold is set to 2.4; Use the equivalent ellipse Feret minor diameter to characterize the particle size of the gravel, and when the equivalent ellipse Feret minor diameter of the particle and the maximum Feret diameter of the particle are less than the third threshold, the gravel is a flaky particle. In this embodiment, the third threshold is preferably set to 0.4;

[0040] 5) Convert the centroid coordinates of the gravel image into the world coordinate system coordinates and record the specific location information of the gravel;

[0041] 6) Inputting the gravel image into the deep learning model for lithology identification and classification, and marking gravel of different categories; 7) Transmitting the location information of marked unqualified gravel to the control system 700.

[0042] The spray system gas source 300 is connected to the spray system 400 to provide gas power to the spray system 400. The spray system 400 is controlled by a control system 700, and the spray time is controlled by a spray delay parameter, which is calculated based on the crushed stone position information, the crushed stone transmission speed and the crushed stone falling height.

[0043] Specifically, the calculation process of the delay parameter t is as follows:

[0044] The screen surface of the needle-shaped control screen is the XY coordinate plane, the material flow direction is the -X direction, the screen surface inclination is α, the position leaving the screen surface is the zero coordinate (0, 0), the vertical distance of the injection position from the zero coordinate is s, the system judgment execution time is t1, the coordinates of unqualified crushed stones are (-x, y), the time for the crushed stones to slide to the zero coordinate point is t2 = x / v, v represents the sliding speed of the crushed stones, and the calculation expression of the time t3 for the crushed stones from the zero coordinate to the injection position is Wherein, g represents the acceleration due to gravity; further, the time delay parameter t=t2+t3-t1.

[0045] It should be noted that the spraying system 400 includes multiple nozzle channels, each nozzle is responsible for a channel (the channel width is determined by the average particle size of the gravel), each nozzle is controlled by a separate solenoid valve, and multiple nozzles are arranged in a row to remove gravel that does not meet the requirements of the entire gravel channel width.

[0046] The spraying system 400 is arranged at the end of the sand and gravel channel, and is used to separate the crushed stones with qualified crushing value and graded gravel from the crushed stones with unqualified crushing value and graded gravel.

[0047] The qualified crushing value graded gravel channel 500 is used to transport the qualified crushing value graded gravel.

[0048] The unqualified crushing value and graded gravel channel 600 is used to transport the unqualified crushing value and graded gravel.

[0049] The control system 700 is connected to the image recognition and lithology determination module 200 and the injection system 400, and is used to receive rock characteristic data and position data and control the injection system 400 to achieve graded gravel classification.

[0050] The present embodiment discloses a crushing value control device for graded gravel arranged on a sand and gravel processing system, which solves the problem of online detection and control of the crushing value of graded gravel in the sand and gravel processing system. By applying the device disclosed in the present embodiment, online monitoring of the crushing value of graded gravel can be achieved in the discharging or conveying link of the sand and gravel processing system, and graded gravel with qualified crushing value and graded gravel with unqualified crushing value can be distinguished, and graded gravel with unqualified crushing value can be separated, thereby reducing the crushing value index of the graded gravel and improving the qualified rate of the crushing value of the graded gravel.

[0051] In a specific implementation case, the needle-shaped control screen 100 includes a support frame, a screen surface, a screen ring and a vibrator, the support frame is arranged in front of the sand and gravel channel, the screen ring is arranged on the support frame, the screen surface is arranged on the screen ring, and the vibrator is connected to the screen ring. Further, the screen surface includes screen holes, the screen holes are long rectangular, and the size of the long rectangular screen holes is determined according to the size of the graded gravel (such as graded gravel 5-10mm, graded gravel 10-20mm, graded gravel 16-31.5mm). For example, for graded gravel 16-31.5mm, the screen hole can be set to an aperture size of 10mm*31.5mm, and the thickness of the sieve surface is less than 10mm. The flaky graded gravel leaves a cubic shape on the screen surface.

[0052] In a specific implementation case, the rock characteristics include color, particle shape and lithology. Since qualified crushing value graded gravel has requirements for color, particle shape and lithology, in this embodiment, the graded gravel with qualified color, particle shape and lithology is qualified crushing value graded gravel, and the graded gravel with unqualified color, particle shape and lithology is unqualified crushing value graded gravel.

[0053] In a specific implementation case, the qualified crushing value graded gravel channel 500 is arranged directly below the end of the sand and gravel channel, and the unqualified crushing value graded gravel channel 600 is arranged beside the qualified crushing value graded gravel channel 500 and away from the end of the sand and gravel channel. The qualified crushing value graded gravel will pass through the sand and gravel channel and freely fall into the qualified crushing value graded gravel channel 500, while the unqualified crushing value graded gravel will be sprayed by the spraying system 400 and fly to the unqualified crushing value graded gravel channel 600 farther away.

[0054] In addition, this embodiment also discloses a method for controlling the crushing value of graded crushed stone, using the above-mentioned device for controlling the crushing value of graded crushed stone, such as Figure 2 As shown, the steps of the method are as follows:

[0055] The original graded crushed stones fall onto the needle-shaped control screen 100, and the needle-shaped control screen 100 screens out the thin-flaked graded crushed stones that do not conform to the cubic shape, and the graded crushed stones that conform to the shape requirements fall onto the sand and gravel channel;

[0056] The image recognition and lithology identification module 200 scans all graded gravel on the sand and gravel channel, collects rock characteristic data and position data of the graded gravel, and transmits the rock characteristic data and position data to the control system 700;

[0057] The control system 700 receives rock characteristic data of graded crushed stone, and divides the graded crushed stone into graded crushed stone with qualified crushing value and graded crushed stone with unqualified crushing value according to the rock characteristic data;

[0058] The control system 700 controls the spraying system 400 through the position data of the graded gravel. The spraying system 400 sprays the unqualified crushing value graded gravel, so that the unqualified crushing value graded gravel falls into the unqualified crushing value graded gravel channel 600, and the qualified crushing value graded gravel freely falls from the sand and gravel channel into the qualified crushing value graded gravel channel 500.

[0059] The embodiment of the present invention discloses a method for controlling the crushing value of graded gravel. The rock characteristic data of the graded gravel is scanned and analyzed by an image recognition and lithology identification module 200, and the graded gravel is divided into graded gravel with qualified crushing values ​​and graded gravel with unqualified crushing values. The control system 700 calibrates the movement path, speed and position of the graded gravel according to the position data, thereby controlling the injection system 400 to inject the graded gravel with unqualified crushing values ​​at a fixed point and at a fixed time, thereby realizing the sorting of the graded gravel.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A crushing value control device for graded crushed stone, arranged on a sand and stone processing system, characterized in that: The crushing value control device for graded crushed stone comprises a needle-shaped control screen (100), an image recognition and lithology identification module (200), an injection system air source (300), an injection system (400), a qualified crushing value graded crushed stone channel (500), an unqualified crushing value graded crushed stone channel (600) and a control system (700); The needle-shaped control screen (100) is arranged in front of the sand and gravel channel in the sand and gravel processing system, and is used to screen out the thin-flaked graded crushed stones that do not conform to the cubic shape; The image recognition and lithology identification module (200) is arranged above the sand and gravel channel, and is used to photograph all graded gravel on the sand and gravel channel and scan and analyze the rock characteristics of the graded gravel to obtain rock characteristic data and position data of the graded gravel; The blowing system gas source (300) is connected to the blowing system (400) and is used to provide gas power to the blowing system (400); The spraying system (400) is arranged at the end of the sand and gravel channel, and is used to separate the crushed stones with qualified crushing value and graded gravel from the crushed stones with unqualified crushing value and graded gravel; The qualified crushing value graded gravel channel (500) is used to transport the qualified crushing value graded gravel; The unqualified crushing value and graded crushed stone channel (600) is used to transport the unqualified crushing value and graded crushed stones; The control system (700) is connected to the image recognition and lithology determination module (200) and the injection system (400), and is used to receive rock characteristic data and position data and control the injection system (400) to achieve graded crushed stone classification.

2. The device for controlling the crushing value of graded crushed stone according to claim 1, characterized in that: The needle-shaped control screen (100) comprises a support frame, a screen surface, a screen ring and a vibrator, wherein the support frame is arranged in front of the sand and gravel channel, the screen ring is arranged on the support frame, the screen surface is arranged on the screen ring, and the vibrator is connected to the screen ring.

3. The device for controlling the crushing value of graded crushed stone according to claim 2, characterized in that: The sieve surface comprises sieve holes, and the sieve holes are in the shape of long rectangular strips.

4. The device for controlling the crushing value of graded crushed stone according to claim 1, characterized in that: The rock characteristics include color, grain shape and lithology.

5. The device for controlling the crushing value of graded crushed stone according to claim 1, characterized in that: The qualified crushing value graded gravel channel (500) is arranged directly below the end of the sand and gravel channel, and the unqualified crushing value graded gravel channel (600) is arranged beside the qualified crushing value graded gravel channel (500) and away from the end of the sand and gravel channel.

6. A method for controlling the crushing value of graded crushed stone, characterized in that: Using the device for controlling the crushing value of graded crushed stone according to any one of claims 1 to 5, the steps of the method are as follows: The original graded crushed stones fall onto the needle-shaped control screen (100), and the needle-shaped control screen (100) screens out the thin-flaked graded crushed stones that do not conform to the cubic shape, and the graded crushed stones that conform to the shape requirements fall onto the sand and gravel channel; The image recognition and lithology identification module (200) scans all graded gravel on the sandstone channel, collects rock characteristic data and position data of the graded gravel, and transmits the rock characteristic data and position data to the control system (700); The control system (700) receives rock characteristic data of graded crushed stone, and divides the graded crushed stone into graded crushed stone with qualified crushing value and graded crushed stone with unqualified crushing value according to the rock characteristic data; The control system (700) controls the injection system (400) through the position data of the graded gravel, and the injection system (400) injects the unqualified crushing value graded gravel, so that the unqualified crushing value graded gravel falls into the unqualified crushing value graded gravel channel (600), and the qualified crushing value graded gravel freely falls from the sand and gravel channel into the qualified crushing value graded gravel channel (500).

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