CN205165215U - Dry process lump coal sorting unit - Google Patents

Abstract

The utility model discloses a dry-process lump coal sorting device, which comprises a vibrating queuing feeding device, a block raw coal slide, a CMOS image acquisition device, a lens dust collector, an image post-processing device, a signal transmission and control system, a baffle plate and Controller, clean coal channel, medium coal channel and gangue channel. The bulk raw coal with a particle size of 50~150mm is queued by the vibrating queuing feeding device and then fed to the corresponding block raw coal slideway. The CMOS image acquisition system collects the image of the block raw coal at a speed of 3~8fps, and the image is transmitted to the background image processing system. Carry out feature extraction and grayscale calculation, divide the ash into three threshold ranges, convert the signal of grayscale difference into an electrical signal, and then control the angle of the baffle to guide the clean coal, medium coal and gangue into the corresponding collection channels. Its advantages are: it can realize dry separation, reduce the dependence on water, and solve the separation of block coal in arid areas; the equipment is small in size, low in energy consumption, and improves the accuracy and automation of raw coal separation.

Description

A dry method lump coal separation device

technical field

The utility model belongs to the technical field of coal sorting machinery and equipment, and relates to a dry lump coal sorting device.

Background technique

At present, there are mainly two traditional methods for lump coal separation, one is dense medium separation; the other is jigging separation. More than 80% of the lump coal below 100mm in the current lump coal sorting is sorted by these two methods. From the point of view of separation principle, these two methods belong to the category of re-selection, that is, the separation of the two is achieved by means of the difference in density between coal and gangue. For the heavy medium separator, by adding heavy medium to prepare a heavy liquid with a density between the density of coal and gangue, the coal and gangue can be stratified in the sorting equipment, and the coal is further realized through the operation of equipment components. And gangue is excluded from the export of different products. As for the jig machine, periodic pulsating water flow is formed at the bottom of the jig machine by blasting air, and the coal and gangue are loosened and layered under the force of the up and down pulsating water flow, and the coal and gangue are loosened and layered under the force of the vertical force combined with the equipment structure to realize the coal and waste rock transportation and separation. In the process of realizing lump coal separation, traditional separation methods and process equipment must rely on water media to achieve coal separation and separation, so people also call this process vividly coal washing. Due to the effect of the water medium, a large amount of slime water needs to be recycled during the coal washing process. At the same time, due to the easily muddy minerals in the raw coal, it is more difficult to treat the slime water, which increases the separation process and cost. It also creates pressure on environmental protection.

In recent years, some new sorting methods have also come out, such as air-dense medium dry sorting, photoelectric and ray row gangue and other methods. However, most of them have not been well applied due to problems such as dust removal, processing capacity, and energy consumption.

Contents of the invention

The purpose of this utility model is to propose a dry-process lump coal separation device based on the gray scale difference between coal and gangue images in order to reduce the pressure of coal slime water treatment and reduce the coal cost.

The purpose of this utility model can be achieved through the following technical measures:

The dry-process lump coal sorting device of the utility model comprises a lumpy raw coal slideway provided with a plurality of chutes installed obliquely on the support, and a vibrating queuing feeding device installed in the middle and upper part of the lumpy raw coal slideway. The vibrating queuing feeding device is provided with discharge openings whose number is equal to the number of chutes of the lumpy raw coal slideway and which correspond to one by one, and the middle and lower parts of each chute of the lumpy raw coal slideway are respectively provided with data lines and image The post-processing device is connected to the CMOS industrial camera and the lens dust collector, and the lighting device is installed above the installation position of the CMOS industrial camera, and the discharge port of each chute of the block raw coal slideway is respectively provided with electromagnetic baffles. The baffle plate controlled by the controller can be rotated 90 degrees in the horizontal and vertical directions, and the clean coal channel, medium coal channel, and gangue channel located under the baffle plate; the electromagnetic baffle controller and the image post-processing device pass through the The data line is connected with the control device.

The CMOS industrial camera described in the utility model adopts the MV-EM130C/M type CMOS color industrial camera, 7 million pixels, 60fps, the highest resolution 1280x960, and the pixel size 3.75x3.75 (μm); the image post-processing device adopts a model of The image data chip of C8051F340; the image post-processing device is connected to the host computer through the data line, and its operation is controlled by the image acquisition and processing program of the host computer to realize the acquisition and processing of raw coal images.

The inclination angle between the lumpy raw coal slideway described in the utility model and the horizontal direction is 39 degrees, and the length of the slideway is 200-300cm (to meet the image acquisition and slide speed, and to increase the processing capacity at the same time), respectively arranged in parallel Four chutes and four sets of CMOS industrial cameras.

The clean coal channel, medium coal channel, and gangue channel described in the utility model have a product channel width of 20cm and a length of 60cm, and are perpendicular to the massive raw coal slideway, and the products falling from the four chutes are acted on by the baffle plate After that, they can fall into the corresponding product channel.

The electromagnetic baffle controller described in the utility model adopts an electromagnetic switch; the control device can be realized by a program controller of any known technology, preferably using a host computer with 64bt, 4 cores, 8G memory, 1T hard disk and passing data The PLC programmable controller connected online with the host computer can realize grayscale batch processing and threshold segmentation processing of image data, and transmit different grayscale threshold ranges to the signal controller and convert them into electrical signals.

The working principle of the utility model is as follows:

The vibrating queuing feeding device feeds the lumps of raw coal arranged in sequence into the chute, and four groups of CMOS industrial cameras collect the raw coal images of the chute respectively. The lens dust collector and LED light source reduce the return of the shooting area and provide sufficient light Each group of auxiliary cameras can collect high-quality raw coal images. The image post-processing device controls the image acquisition process, the electromagnetic baffle controller controls the opening and closing of the baffles of each slideway, the control device receives the raw coal gray level difference data transmitted from the image post-processing device and converts it into an electrical signal and It is transmitted to the electromagnetic baffle controller to realize the control of the baffle. The baffle can rotate 90 degrees in the horizontal and vertical directions. With the rotation of the baffle, clean coal, medium coal and gangue fall into the clean coal channel respectively , Medium coal channel and gangue channel. The bracket provides a certain angle for the slideway and plays a certain supporting role for the whole device.

The beneficial effects of the utility model are as follows:

Since the utility model adopts four-channel parallel block raw coal image acquisition and separation process, and utilizes image gray scale difference to intelligently control the opening and closing angle of the baffle plate, the separation of three products (clean coal, middling coal and gangue) of lump raw coal is realized. The sorting particle size is 50~150mm (the device in the prior art can only be used for gangue discharge, and the particle size is >100mm).

Description of drawings

Fig. 1 is the structural representation of the utility model.

Figure 2 Schematic diagram of programmable controller to realize automatic control.

Figure 3 is a schematic diagram of baffles making lumps of different gray values fall into corresponding product channels.

Figure 4 Schematic diagram of the separation process of the three-product (clean coal, medium coal and gangue) lump coal separation device.

detailed description

The utility model will be further described below in conjunction with embodiment (accompanying drawing):

As shown in Figure 1, the dry method lump coal separation device of the present utility model includes a lumpy raw coal slideway 2 provided with a plurality of chutes installed on the support 13 in an oblique manner, installed in the lumpy raw coal slideway 2 The upper vibrating queuing feeding device 1, the vibrating queuing feeding device 1 is provided with a quantity equal to the number of chutes of the block raw coal slideway, and one-to-one corresponding discharge openings. The middle and lower parts of each chute are respectively provided with a CMOS industrial camera 3 and a lens duster 5 connected to an image post-processing device 8 through a data line, and an illumination device 4 is arranged above the installation position of the CMOS industrial camera 3. The outlet of each chute of the slideway 2 is respectively provided with a baffle 9 controlled by an electromagnetic baffle controller 6 that can rotate 90 degrees in the horizontal and vertical directions, and a clean coal channel under the baffle 9 10. Medium coal channel 11 and gangue channel 12; the electromagnetic baffle controller 6 and the image post-processing device 8 are respectively connected to the control device through data lines.

The CMOS industrial camera 3 described in the utility model adopts the MV-EM130C/M type CMOS color industrial camera, 7 million pixels, 60fps, the highest resolution 1280x960, and the pixel size 3.75x3.75 (μm); the image post-processing device 8 adopts The image data chip of model C8051F340; the image post-processing device 8 is connected to the host computer through a data line, and its operation is controlled by the image acquisition and processing program of the host computer to realize the acquisition and processing of raw coal images.

The inclination angle between the massive raw coal slideway 2 described in the utility model and the horizontal direction is 39 degrees, and the length of the slideway is 200-300cm (to meet the image acquisition and sliding speed, and to increase the processing capacity), respectively arranged in parallel Four chutes and four sets of CMOS industrial cameras3.

The clean coal channel 10 described in the utility model, the medium coal channel 11, the product channel width of the gangue channel 12 are 20cm, the length is 60cm, and are perpendicular to the massive raw coal slideway 2, and the product where the four chutes fall After the action of the baffle, they can all fall into the corresponding product channel (see Figure 3).

The electromagnetic baffle controller described in the utility model adopts an electromagnetic switch; the control device can be realized by a program controller of any known technology, preferably a host computer with 64bt, 4 cores, 8G memory, and 1T hard disk, supported by software Mainly for the win7 operating system, the image processing system adopts open source grayscale algorithm software based on image binarization processing, which can realize grayscale batch processing of image data and threshold segmentation processing based on grayscale, and communicate with the host computer through the data line The connected PLC programmable controller, and transmits the different gray threshold ranges to the signal controller and converts them into electrical signals (see Figure 2).

The utility model will be further described below in conjunction with the sorting process of the utility model of Fig. 3:

(1) Optional assessment and threshold determination

In the dry method lump coal sorting device of the utility model, the separation basis is to establish the relationship between the difference in the gray scale of the raw coal image and the difference in the ash content of different coal lumps of the raw coal. Therefore, it is necessary to carry out image data acquisition and analysis. After sampling the raw coal to be processed, carry out image acquisition, collect 100 to 500 images of different raw coal, analyze the gray level of the image after denoising and binarization processing, and at the same time carry out industrial processing on the collected samples. Analyze and obtain the ash content of the corresponding sample, so as to establish the relationship between the ash content of the block raw coal and the image gray value. The ash value ranges from 5% to 75%. Every 1% increase in the ash content corresponds to the gray value of a raw coal image, and based on this, it can be divided Image grayscale threshold intervals of clean coal, medium coal and gangue.

(2) The system starts up and runs

The sequence of start-up operation is to first turn on the COMS lens dust collector and LED light source, and turn on the automatic control system. Secondly, the feeder is turned on, and the coal flow is fed to the belt conveyor at a certain speed, and then enters the sorting section after passing through the queuing device to realize sorting. After selection, the products fall into the corresponding product channel and then transported to the warehouse by the belt.

(3) System operation and maintenance

After the system is turned on and running, the gray threshold value in the control program of the upper computer can be adjusted according to the product ash content requirements to achieve the product ash content requirements. The operation and maintenance of the equipment can be realized by 1~2 people in the operation of the equipment, and the regular inspection of the equipment is normal or not.

The lump coal feeding granularity range of the lump coal sorting device of the utility model is 50 mm to 150 mm.

The lumpy raw coal slideway forms an angle of 39 degrees with the horizontal direction to ensure that the lump coal has a certain falling speed. The width of each chute in the block raw coal slideway is 200mm, and the length is 3000mm.

In the three-product lump coal separation device of the present utility model, the lump raw coal after queuing slides down along the block raw coal slideway 2, and the CMOS industrial camera 3 is installed at 30-40cm directly above the slideway, and the lens dust collector 5 Installed at a distance of 10cm from the CMOS lens, the LED light source is located in front of the slideway and below the CMOS industrial camera. The lens dust remover and LED light source serve the CMOS image acquisition device so as to acquire accurate and reasonable images.

The lump raw coal entering the massive raw coal chute 2 is collected by a CMOS industrial camera. After the raw coal image is transmitted to the host computer for grayscale calculation, it is divided into three ranges from low to high according to the grayscale value.

The upper computer and the PLC programmable controller 7 are arranged in the central control room, and are connected with the CMOS industrial camera 3 and the electromagnetic baffle controller through data lines and signal lines. Among them, the image calculation and processing program can be run in the upper computer and the programmable control of PLC can be realized.

The baffle plate 9 is connected to the massive raw coal slideway 2 through a hinge or a rotating shaft connection, and the baffle plate 9 can rotate 90o in the horizontal and vertical directions. Electromagnetic baffle controller 6 is installed in the rear of baffle 9, and is connected with electromagnetic and PLC controller through signal data line, and baffle controller can convert electromagnetic signal into mechanical force to act on baffle 9 simultaneously. The lump raw coal entering the massive raw coal slideway 2 collects the raw coal image through the CMOS industrial camera 3, and after the grayscale calculation is performed on the raw coal image by the host computer, it is divided into three ranges according to the grayscale value from low to high; the clean coal channel 10, The medium coal channel 11 and the gangue channel 12 are located side by side at the lower right of the four chutes. After the raw coal with different gray values is identified by the gray scale, it passes through the opening and closing of the baffle plate 9 to realize the separation of clean coal, medium coal and gangue with different ash contents. Fall into the corresponding product channel respectively and be transported away.

Claims (5)

1. a dry method lump coal separation device, it is characterized in that: it comprises the block raw coal slideway (2) being provided with multiple chute be arranged in tilting mode on support (13), be arranged on the vibrations queuing charging gear (1) of block raw coal slideway (2) middle and upper part, it is equal with the chute quantity of described block raw coal slideway that described vibrations queuing charging gear (1) is provided with quantity, and discharge gate one to one, CMOS industrial camera (3) and camera lens deduster (5) that data wire is connected with image after processing device (8) is provided with respectively in the middle and lower part of each chute of block raw coal slideway (2), and lighting device (4) is provided with above CMOS industrial camera (3) installed position, the baffle plates (9) that can do 90 degree of rotations in level and vertical direction controlled by electromagnetic barriers controller (6) are respectively arranged with in the discharge outlet of each chute of block raw coal slideway (2), and be positioned at the cleaned coal passage (10) of baffle plate (9) below, middle coal channel (11), spoil passage (12), described electromagnetic barriers controller (6), image after processing device (8) are connected with control device respectively by data wire.

2. dry method lump coal separation device according to claim 1, it is characterized in that: described CMOS industrial camera (3) adopts the colored industrial camera of MV-EM130C/M type CMOS, 7,000,000 pixels, 60fps, highest resolution 1280x960, Pixel Dimensions 3.75x3.75 μm.

3. dry method lump coal separation device according to claim 1, is characterized in that: described image after processing device (8) employing model is the view data chip of C8051F340.

4. dry method lump coal separation device according to claim 1, it is characterized in that: described block raw coal slideway (2) is 39 degree with the inclination angle of horizontal direction, slideway length is 200 ~ 300cm, and be arranged in parallel four chutes and four covers CMOS industrial camera (3) respectively.

5. dry method lump coal separation device according to claim 1, it is characterized in that: the product channels width of described cleaned coal passage (10), middle coal channel (11), spoil passage (12) is 20cm, length is 60cm, and perpendicular with block raw coal slideway (2).