Online detection conveying equipment

Abstract

According to the on-line detection conveying equipment, a cross section sampling mechanism is adopted to perform fixed-point sampling in a sampling area on a material conveying belt when the material conveying belt runs, and a pair of sampling plates move from the two sides of the material conveying belt to the center line to be folded and are attached to the material conveying belt all the time in the process; therefore, a section of material passing through the material conveying belt within a short time is completely scraped onto a pair of sampling plates, complete and accurate section sampling is realized, and the accuracy of a detection result is ensured; the sample transfer mechanism is adopted to drive the section sampling mechanism to make two-axis movement on the material conveying belt to move between the sampling area and the detecting and putting-back mechanism, and the detecting and putting-back mechanism detects and puts back section samples through the vibration discharging device, the material returning conveying belt and the sample detecting device. And full-process automation of on-line detection and conveying work can be realized.

Description

Technical Field

[0001] The present invention relates to the technical field of online detection, and in particular to online detection conveying equipment. Background Art

[0002] In the prior art, online particle size detection equipment for solid materials such as sand and gravel aggregates usually receives materials at the material drop point on the conveyor line or samples the material diversion on the conveyor line, intending to obtain cross-sectional samples that can reflect the particle size characteristics of the entire batch of materials, and obtain the particle size characteristics of the entire batch of materials by detecting the particle size characteristics of the cross-sectional samples. However, during sampling, the impact of samples on the sampling device during the dropping process or the random mixing of samples during the diversion process will lead to inaccurate and incomplete sampling, which will in turn lead to inaccurate particle size detection results for the entire batch of materials. Summary of the invention

[0003] In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides an online detection and conveying device, which can completely and accurately obtain cross-sectional samples for detection during the process of conveying solid materials such as sand and gravel aggregates, thereby ensuring the accuracy of material detection results.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention to solve the technical problem is to detect the conveying equipment online, including a material conveyor belt and a cross-section sampling mechanism:

[0005] The material conveyor belt is used to transport solid materials. A sampling area is fixedly arranged along its length direction for the cross-section sampling mechanism to take samples at a fixed point. A number of rollers are arranged below the sampling area to support the material conveyor belt when it passes through the sampling area and is under pressure, so that the material conveyor belt presents a curved surface shape with high sides and low middle. The rollers generate magnetic attraction when sampling;

[0006] The cross-sectional sampling mechanism comprises a plurality of pressing wheels, a pair of sampling plates, a pair of plate driving devices, and a plate retracting device. The plurality of pressing wheels are used to press the two sides of the material conveyor belt during sampling. The sampling plate is a magnetic straight plate which can be elastically deformed into a curved shape under the action of external force. The pair of plate driving devices are used to synchronously drive a pair of sampling plates to move from the two sides of the material conveyor belt to the center line in a curved shape during sampling to close and completely cover a section of the material conveyor belt, and to synchronously drive a pair of sampling plates to move in the opposite direction to separate from each other and return to their original positions during lofting. The pair of sampling plates always fit the material conveyor belt during the sampling movement, press the material conveyor belt down to fit the roller, and generate magnetic attraction with the material conveyor belt separated by the roller. The plate retracting device is used to connect and fix a pair of closed sampling plates during sampling, and to loosen and separate a pair of closed sampling plates during lofting.

[0007] In some embodiments, the sampling plate is a rectangular iron plate.

[0008] In some embodiments, the plate driving device includes a driving motor, a power roller, and a plurality of guide rollers. The driving motor is connected to the power roller to drive the power roller to rotate. A plurality of protrusions are circumferentially arranged at both ends of the power roller. A plurality of positioning holes are arranged on both sides of the sampling plate. The plurality of protrusions and the plurality of positioning holes match each other so that the power roller and the sampling plate engage and transmit. A plurality of guide rollers are arranged to form a curved path that causes the sampling plate to undergo elastic deformation into a curved shape, which is used to clamp and transport the sampling plate.

[0009] In some embodiments, the plate folding and unfolding device includes a first power lifting device and a needle seat. A plurality of grid needles are provided on the needle seat. The lower ends of the grid needles extend out of the lower wall of the needle seat and can controllably generate magnetic attraction intermittently, which is used to generate magnetic attraction to contact a pair of closed sampling plates and connect and fix them during sampling, and stop generating magnetic attraction to detach from a pair of closed sampling plates during layout. The first power lifting device is connected to the needle seat, and is used to drive the needle seat to lift and lower so that the lower ends of the grid needles detach from or contact the sampling plates.

[0010] In some embodiments, an electromagnet device is provided in the needle seat, and the electromagnet device is connected to the gate needle, so as to enable the gate needle to controllably and intermittently generate magnetic attraction.

[0011] In some embodiments, an elastic element is connected between the gate needle and the needle seat to provide a buffer for the gate needle when the lower end of the gate needle contacts the sampling plate.

[0012] In some embodiments, a sample transport mechanism is also included, which includes a first track frame and a second track frame. The first track frame is vertically arranged above the material conveyor belt, and a second power lifting device is provided thereon. The cross-sectional sampling mechanism is slidably fixed on the first track frame, and the second power lifting device is connected to the cross-sectional sampling mechanism to drive the cross-sectional sampling mechanism to rise and fall above the material conveyor belt. The second track frame is arranged above the material conveyor belt and parallel to the length direction of the material conveyor belt, and a power transverse movement device is provided thereon. The first track frame is slidably fixed on the second track frame, and the power transverse movement device is connected to the first track frame to drive the cross-sectional sampling mechanism to move transversely along the length direction of the material conveyor belt above the material conveyor belt.

[0013] In some embodiments, a detection and return mechanism is also included, which is arranged above the material conveyor belt, and includes a vibrating feeder, a return conveyor belt, and a sample detection device. The vibrating feeder includes a feed port, and the return conveyor belt is arranged below the feed port. The sample detection device includes a detection sensor, and the detection sensor is arranged above the return conveyor belt.

[0014] In some embodiments, the detection and return mechanism is located behind the sampling area along the running direction of the material conveyor belt.

[0015] In some embodiments, the sample detection device is a three-dimensional scanner.

[0016] Due to the application of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0017] 1. The present invention adopts a cross-sectional sampling mechanism to sample at a fixed point in the sampling area on the material conveyor belt when the material conveyor belt is running. A pair of sampling plates moves from both sides of the material conveyor belt to the center line and closes together. In this process, the material passing through the material conveyor belt in a short time is scraped onto the pair of sampling plates, thereby achieving complete and accurate cross-sectional sampling and ensuring the accuracy of the test results.

[0018] 2. The present invention also uses a sample transport mechanism to drive the cross-section sampling mechanism to move between the sampling area and the detection and return mechanism on the material conveyor belt in two axes. The detection and return mechanism detects and returns the cross-section samples through a vibrating feeder, a return conveyor belt, and a sample detection device, thereby realizing full process automation of online detection and transportation work;

[0019] 3. The present invention fully considers that the material conveyor belt is always in operation during the sampling process. The sampling plate and the material conveyor belt can be dynamically matched in a curved shape during sampling through the coordinated cooperation of the pressure wheel, the plate driving device, the plate retracting device and the rollers at the sampling area in the cross-section sampling mechanism. The magnetic attraction structure and the buffer structure are also provided to improve the design. The design is very clever, the details are perfect, and the industrial design level is high.

[0020] 4. The present invention is not only suitable for online particle size detection of sand and gravel aggregates, but also suitable for other types of detection work during online transportation of other types of solid materials. It has a wide range of applications, high detection efficiency and high accuracy of detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view of the first embodiment of the online detection and conveying equipment proposed by the present invention.

[0022] Figure 2 It is a stereoscopic diagram of the first embodiment of the online detection and conveying equipment proposed by the present invention.

[0023] Figure 3 This is a three-dimensional diagram of the cross-sectional sampling mechanism in the first embodiment of the online detection and conveying device proposed by the present invention.

[0024] Figure 4 This is a three-dimensional diagram of a pair of sampling plates, a pair of plate driving devices, and a plate retracting device excluding the first power lifting device in Example 1 of the online detection and conveying equipment proposed by the present invention.

[0025] Figure 5 This is a schematic structural diagram of a needle holder, a plurality of grid needles, and an iron core coil in Embodiment 1 of the online detection and conveying device proposed by the present invention.

[0026] In the figure: 1. material conveyor belt; 2. cross-sectional sampling mechanism; 3. sampling area; 4. roller; 5. pressure wheel; 6. sampling plate; 7. plate driving device; 8. plate retracting device; 9. driving motor; 10. power roller; 11. guide roller; 12. bump; 13. positioning hole; 14. first power lifting device; 15. needle seat; 16. grid needle; 17. electromagnet device; 18. elastic element; 19. sample transport mechanism; 20. first track frame; 21. second track frame; 22. second power lifting device; 23. power lateral movement device; 24. detection and return mechanism; 25. vibration feeder; 26. return material conveyor belt; 27. sample detection device; 28. feed port; 29. ​​detection sensor; 30. roller base. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with specific embodiments:

[0028] Combine 1 picture to Figure 5 The first embodiment of the online detection device proposed by the present invention includes a material conveyor belt 1, a cross-section sampling mechanism 2, a sample transport mechanism 19, and a detection return mechanism 24:

[0029] The material conveyor belt 1 (the material conveyor belt 1 in the present invention refers to the upper conveyor belt of the belt conveyor, i.e., the working section) is used to convey solid materials. A sampling area 3 is fixedly provided along its length direction for the cross-section sampling mechanism 2 to take samples at a fixed point. A plurality of rollers 4 are provided below the sampling area 3. The plurality of rollers 4 are arranged in groups of three and multiple groups are provided. A roller base 30 is supported below. The three rollers 4 in the same group are arranged adjacent to each other in the same vertical plane. One of the rollers 4 is horizontally arranged in the middle, and the other two rollers 4 are inclined upwardly arranged on both sides and symmetrically. The multiple groups of rollers 4 are arranged in parallel along the length direction of the material conveyor belt 1, and are used to support the material conveyor belt 1 when the material conveyor belt 1 passes through the sampling area 3 and is under pressure, so that the material conveyor belt 1 is in a curved shape with high sides and low middle. The rollers 4 can generate magnetic attraction during sampling.

[0030] The cross-sectional sampling mechanism 2 includes four pressing wheels 5, a pair of sampling plates 6, a pair of plate driving devices 7, and a plate retracting device 8. The four pressing wheels 5 are used to press the two sides of the material conveyor belt 1 during sampling. The sampling plate 6 is a flat plate with magnetism and elasticity, which can be elastically deformed into a curved shape under the action of external force. The plate driving device 7 includes a driving motor 9, a power roller 10, and a plurality of guide rollers 11. The driving motor 9 is connected to the power roller 10 and is used to drive the power roller 10 to rotate. A plurality of protrusions 12 are circumferentially arranged at both ends of the power roller 10. A plurality of positioning holes 13 are arranged on both sides of the sampling plate 6. The plurality of protrusions 12 The plurality of positioning holes 13 are matched with each other, so that the power roller 10 and the sampling plate 6 are meshed and transmitted, and the plurality of guide rollers 11 are arranged to form a curved path that causes the sampling plate 6 to produce elastic deformation in a curved surface shape, which is used to clamp and transport the sampling plate 6. The driving motor 9 drives the power roller 10 to rotate forward and reversely, which can drive the sampling plate 6 to move forward and backward between the curved paths formed by the plurality of guide rollers 11. In general, a pair of plate driving devices 7 are used to synchronously drive a pair of sampling plates 6 to move from both sides of the material conveyor belt 1 to the center line in a curved shape during sampling to close and completely cover a section of the material conveyor belt 1, and in the setting out (in the present invention) When placing the sample, a pair of sampling plates 6 are synchronously driven to move in the opposite direction and separate from each other and return to their original positions. During the sampling movement, the pair of sampling plates 6 always fit the material conveyor belt 1, press the material conveyor belt 1 down to fit the roller 4, and generate magnetic attraction with the roller 4 between the material conveyor belt 1 and the plate receiving and releasing device 8 includes a first power lifting device 14 and a needle seat 15. A plurality of grid needles 16 are arranged on the needle seat 15. An electromagnet device 17 is arranged in the needle seat 15. The electromagnet device 17 is connected to the grid needle 16 to controllably intermittently generate magnetic attraction at the lower end of the grid needle 16. The lower end of the grid needle 16 extends out of the lower wall of the needle seat 15. It is used to generate magnetic attraction to contact a pair of closed sampling plates 6 and connect and fix them when sampling, and stop generating magnetic attraction to detach from the pair of closed sampling plates 6 when setting out. The first power lifting device 14 is connected to the needle seat 15, and is used to drive the needle seat 15 to lift and lower the lower end of the grid needle 16 to detach from or contact the sampling plate 6. An elastic element 18 is connected between the grid needle 16 and the needle seat 15, and is used to provide a buffer for the grid needle 16 when the lower end of the grid needle 16 contacts the sampling plate 6. In general, the plate retracting device 8 is used to connect and fix a pair of closed sampling plates 6 when sampling, and to release and detach from the pair of closed sampling plates 6 when setting out.

[0031] The detection and returning mechanism 24 is arranged above the material conveyor belt 1 and is located behind the sampling area 3 along the running direction of the material conveyor belt 1. It includes a vibrating feeder 25, a return conveyor belt 26, and a sample detection device 27. The vibrating feeder 25 includes a feed port 28. The return conveyor belt 26 is arranged below the feed port 28. The sample detection device 27 includes a detection sensor 29. The detection sensor 29 is arranged above the return conveyor belt 26.

[0032] The sample transport mechanism 19 includes a first track frame 20 and a second track frame 21. The first track frame 20 is vertically arranged above the material conveyor belt 1, and a second power lifting device 22 is arranged thereon. The cross-section sampling mechanism 2 is slidably fixed on the first track frame 20, and the second power lifting device 22 is connected to the cross-section sampling mechanism 2, and is used to drive the cross-section sampling mechanism 2 to rise and fall above the material conveyor belt 1. The second track frame 21 is arranged above the material conveyor belt 1 and parallel to the length direction of the material conveyor belt 1, and a power transverse movement device 23 is arranged thereon. The first track frame 20 is slidably fixed on the second track frame 21, and the power transverse movement device 23 is connected to the first track frame 20, and is used to drive the cross-section sampling mechanism 2 to move transversely along the length direction of the material conveyor belt 1 above the material conveyor belt. In general, the sample transport mechanism 19 is used to drive the cross-section sampling mechanism 2 to perform two-axis movement on the material conveyor belt 1 between the sampling area 3 and the detection and return mechanism 24;

[0033] The working principle of the first embodiment is: the material conveyor belt 1 keeps running. When sampling, the sample transfer mechanism 19 drives the cross-section sampling mechanism 2 to the material conveyor belt 1 at the material sampling area 3. The pressing wheel 5 presses the two sides of the material conveyor belt 1 and contacts the material conveyor belt 1 to generate friction and rolls with the running of the material conveyor belt 1. A pair of plate driving devices 7 synchronously drive a pair of sampling plates 6 to move from the two sides of the material conveyor belt 1 to the center line in a curved shape to close and completely cover a section of the material conveyor belt 1. In this process, the pair of sampling plates 6 themselves have magnetism and move along the curved path. The conveyor belt 1 is tilted downward and elastically deformed by force to form a curved surface. The conveyor belt 1 is pressed down to completely fit the roller 4, which is a curved surface with high sides and low in the middle. The roller 4 contacts the conveyor belt 1 to generate friction and rolls with the movement of the conveyor belt 1. The roller 4 generates a magnetic force to attract a pair of sampling plates 6 to clamp the conveyor belt 1, so that the pair of sampling plates 6 can always fit the conveyor belt 1, thereby scraping all the materials that pass through the conveyor belt 1 in a short time onto the pair of sampling plates 6, and the plate retracting device 8 drives the gate needle 16 to descend and pass through the section. The surface sample contacts a pair of closed sampling plates 6, and the electromagnet device 17 is energized to generate magnetic attraction force on the grid needle 16, which attracts the pair of closed sampling plates 6 to connect and fix them in a curved shape. The sample transport mechanism 19 drives the cross-section sampling mechanism 2 to rise, so that the pair of sampling plates 6 carry the cross-section sample away from the material conveyor belt 1, thereby achieving complete and accurate cross-section sampling. When setting out, the sample transport mechanism 19 drives the cross-section sampling mechanism 2 to move to the vibrating feeder 25, so that the electromagnet device 17 is powered off and the grid needle 16 rises and separates from the pair of closed sampling plates 6. A pair of plate driving devices 7 synchronously drive a pair of closed sampling plates 6 to move in opposite directions and separate from each other and return to their original positions, and pour the cross-sectional samples onto the vibrating feeder 25. After being vibrated and flattened by the vibrating feeder 25, the cross-sectional samples fall onto the return material conveyor 26 through the feed port 28. The detection sensor 29 senses the cross-sectional samples on the return material conveyor 26 and transmits the sensing information to the sample detection device 27 for processing to obtain the detection results. After being transported by the return material conveyor 26, the cross-sectional samples fall onto the material conveyor 1 and continue to participate in the transportation, thereby completing the detection and return of the cross-sectional samples.

[0034] In the above embodiments and other embodiments of the present invention:

[0035] In addition to the sampling area 3, conventional rollers 4 that do not generate magnetic attraction can also be set under the material conveyor belt 1 to support the material conveyor belt 1 and the weight of the material to ensure stable transportation of the material. The number and arrangement of rollers 4 are not limited, and the sampling area 3 rollers 4 need to be set in multiple groups. Multiple rollers 4 in the same group are arranged adjacent to each other in a vertical plane, and multiple groups of rollers 4 are arranged adjacent to each other, so that the material conveyor belt 1 can be pressed down by the sampling plate 6 during sampling to stably maintain a certain length of the curved surface shape with high sides and low middle. The rollers 4 in the sampling area 3 can controllably generate magnetic attraction intermittently by using electromagnet technology, or can continuously generate magnetic attraction by using permanent magnetic materials in their own components. Regardless of which method is used, the magnetic attraction generated by the rollers 4 in the sampling area 3 and the sampling plate 6 separated by the material conveyor belt 1 does not affect the smooth movement of the sampling plate 6 on the material conveyor belt 1. When the rollers 4 in the sampling area 3 continuously generate magnetic attraction by using permanent magnetic materials in their own components, it is necessary to ensure that a pair of closed sampling plates 6 can carry the cross-sectional samples and smoothly leave the material conveyor belt 1 without spilling.

[0036] Preferably, the number of the pressing wheels 5 is at least four, and the pressing wheels 5 need not only be distributed on both sides of the length direction of the material conveyor belt 1 to simultaneously press both sides of the material conveyor belt 1 during sampling, but are also preferably distributed on both sides of the movement direction of a pair of sampling plates 6 to simultaneously press the material conveyor belt 1 at the outer sides of both ends of the sampling plates 6 during sampling, so as to ensure that the material conveyor belt 1 at the sampling area 3 maintains a stable curved shape during sampling;

[0037] Preferably, the sampling plate 6 is a rectangular iron plate, which has magnetism, good elasticity and toughness, is easy to obtain, durable, simple to process, and low in cost. The regular rectangular shape also facilitates the driving and control of the sampling plate 6, reducing the difficulty of cross-sectional sampling.

[0038] In the first embodiment, the driving motor 9 is arranged inside the power roller 10 to drive the power roller 10 to rotate around its own central axis, which has the advantages of saving space and convenient layout. In other embodiments of the present invention, the driving motor 9 can also be arranged outside the power roller 10 and connected to the power roller 10. Preferably, the protrusions 12 at both ends of the power roller 10 are evenly arranged in the circumference, and the positioning holes 13 on both sides of the sampling plate are arranged in a straight line with equal spacing to ensure the smooth meshing transmission of the power roller 10 and the sampling plate 6, thereby reducing the difficulty of processing;

[0039] In the first embodiment, the electromagnet device 17 is an iron core coil disposed in the needle seat 15, and all the gate needles 16 are iron needles and penetrate the iron core coil. When the iron core coil is energized, all the gate needles 16 can generate magnetic attraction, and the upper ends of the gate needles 16 extend out of the upper wall of the needle seat 15, and an elastic element 18 is connected to the needle seat 15, and the elastic element 18 is a spring. In other embodiments of the present invention, other electromagnet devices 17 different from the single iron core coil can be used to make the gate needles 16 controllably intermittently generate magnetic attraction, and other elastic elements 18 different from springs and other buffer structures different from the first embodiment can also be used. In the present invention, when sampling, a pair of sampling plates 6 are closed to form a curved surface with high sides and low middle. Only when the plate retracting device 8 drives the gate needles 16 to fully descend can the lower ends of all the gate needles 16 be in contact with the curved surface. In order to prevent the sampling plate 6 and the material conveyor belt 1 from being squeezed and deformed by the gate needles 16, it is necessary to set an elastic element 18 to provide buffering between the gate needles 16 and the needle seat 15. Preferably, the distribution shape of the grid needles 16 corresponds to the shape of a pair of sampling plates 6 after closing, and the grid needles 16 are evenly distributed, so that when the grid needles 16 suck the pair of closed sampling plates 6 to connect and fix them, the lower ends of the grid needles 16 are in full contact with the surface of the pair of sampling plates 6, and the force is evenly applied everywhere, thereby improving the stability of the connection and fixation. Preferably, the lower ends of the grid needles 16 are arranged to be high on both sides and low in the middle, which fits the curved surface shape of the pair of closed sampling plates 6, so as to avoid excessive elastic force on the grid needles 16 on both sides, which affects their connection and fixation with the pair of sampling plates 6;

[0040] Preferably, the first power lifting device 14, the second power lifting device 22, and the power lateral movement device 23 can use cylinders and / or motors as power sources, and use gear racks and / or pulley rails as sliding fixed structures;

[0041] In the first embodiment, the sample detection device 27 is a small three-dimensional scanner, on which a detection sensor 29, i.e., a camera module, is provided. The small three-dimensional scanner is directly arranged above the return material conveyor belt 26 with the camera module facing downward. The small three-dimensional scanner is also connected to other terminal devices by wired and / or wireless means for processing, displaying and storing detection data. When the present invention is applied to online particle size detection of sand and gravel aggregates, the sample detection device 27 adopts a three-dimensional scanner. The three-dimensional scanner can scan and obtain three-dimensional point cloud data of the sand and gravel aggregate sample to measure its particle size characteristics and distribution. Of course, the present invention can also be applied to the online detection and transportation of more types of solid materials besides sand and gravel aggregates, and more types of sample detection devices 27 other than three-dimensional scanners can be used to complete other types of detection work;

[0042] Preferably, the detection and return mechanism 24 is located behind the sampling area 3 along the running direction of the material conveyor belt 1, so as to avoid wasting energy by repeated transportation of cross-section samples and also avoid interference with re-sampling after the samples are returned;

[0043] The present invention preferably adopts PLC technology to centrally manage and automatically control components such as the material conveyor belt 1, the drive motor 9, the first power lifting device 14, the second power lifting device 22, the power transverse movement device 23, the electromagnet device 17, the vibrating feeder 25, the return material conveyor belt 26 and even the sample detection device 27, so as to realize the full process automation of online detection and transportation work.

[0044] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. Online detection and conveying equipment, characterized in that: It includes a material conveyor belt (1) and a cross-section sampling mechanism (2): The material conveyor belt (1) is used to convey solid materials. A sampling area (3) is fixedly provided along its length direction for the cross-section sampling mechanism (2) to take samples at a fixed point. A plurality of rollers (4) are provided below the sampling area (3) to support the material conveyor belt (1) when the material conveyor belt (1) passes through the sampling area (3) and is subjected to pressure, so that the material conveyor belt (1) presents a curved surface shape with high sides and low middle. The rollers (4) generate magnetic attraction during sampling. The cross-sectional sampling mechanism (2) comprises a plurality of pressing wheels (5), a pair of sampling plates (6), a pair of plate driving devices (7), and a plate retracting device (8). The plurality of pressing wheels (5) are used to press the two sides of the material conveyor belt (1) during sampling. The sampling plates (6) are magnetic flat plates that can be elastically deformed into a curved shape under the action of external force. The pair of plate driving devices (7) are used to synchronously drive the pair of sampling plates (6) to move from the two sides of the material conveyor belt (1) to the center line in a curved shape during sampling to close a section of the material conveyor belt. The material conveyor belt (1) is completely covered, and during sample laying, a pair of the sampling plates (6) are synchronously driven to move in opposite directions and separate from each other and return to their original positions. During the sampling movement, the pair of the sampling plates (6) are always in contact with the material conveyor belt (1), pressing the material conveyor belt (1) downward to contact the roller (4), and magnetically attracting the material conveyor belt (1) with the roller (4). The plate retracting device (8) is used to connect and fix a pair of the closed sampling plates (6) during sampling, and to release and detach a pair of the closed sampling plates (6) during sample laying.

2. The online detection and conveying equipment according to claim 1, characterized in that: The sampling plate (6) is a rectangular iron plate.

3. The online detection and conveying equipment according to claim 1, characterized in that: The plate driving device (7) comprises a driving motor (9), a power roller (10), and a plurality of guide rollers (11). The driving motor (9) is connected to the power roller (10) and is used to drive the power roller (10) to rotate. A plurality of protrusions (12) are circumferentially arranged at both ends of the power roller (10). A plurality of positioning holes (13) are arranged on both sides of the sampling plate (6). The plurality of protrusions (12) and the plurality of positioning holes (13) match each other so that the power roller (10) and the sampling plate (6) are meshed and transmitted. The plurality of guide rollers (11) are arranged to form a curved path that causes the sampling plate (6) to undergo elastic deformation and present a curved surface shape, so as to clamp and transport the sampling plate (6).

4. The online detection and conveying equipment according to claim 1, characterized in that: The plate retracting and releasing device (8) comprises a first power lifting device (14) and a needle seat (15). The needle seat (15) is provided with a plurality of grid needles (16). The lower ends of the grid needles (16) extend out of the lower wall of the needle seat (15) and can controllably generate magnetic attraction intermittently, and are used to generate magnetic attraction to contact a pair of closed sampling plates (6) and connect and fix them when sampling, and stop generating magnetic attraction to detach from a pair of closed sampling plates (6) when placing samples. The first power lifting device (14) is connected to the needle seat (15) and is used to drive the needle seat (15) to rise and fall so that the lower ends of the grid needles (16) detach from or contact the sampling plates (6).

5. The online detection and conveying equipment according to claim 4, characterized in that: An electromagnet device (17) is provided in the needle seat (15), and the electromagnet device (17) is connected to the gate needle (16) and is used to enable the gate needle (16) to controllably and intermittently generate magnetic attraction.

6. The online detection and conveying equipment according to claim 4, characterized in that: An elastic element (18) is connected between the grid needle (16) and the needle seat (15) and is used to provide a buffer for the grid needle (16) when the lower end of the grid needle (16) contacts the sampling plate (6).

7. The online detection and conveying equipment according to claim 1, characterized in that: The sample transport mechanism (19) further comprises a sample transport mechanism (19), wherein the sample transport mechanism (19) comprises a first track frame (20) and a second track frame (21); the first track frame (20) is vertically arranged above the material conveyor belt (1), and a second power lifting device (22) is arranged thereon; the cross-sectional sampling mechanism (2) is slidably fixed on the first track frame (20); the second power lifting device (22) is connected to the cross-sectional sampling mechanism (2) and is used to drive the cross-sectional sampling mechanism (2) to be lifted and lowered above the material conveyor belt (1); the second track frame (21) is arranged above the material conveyor belt (1) and is parallel to the length direction of the material conveyor belt (1); a power transverse movement device (23) is arranged thereon; the first track frame (20) is slidably fixed on the second track frame (21); the power transverse movement device (23) is connected to the first track frame (20) and is used to drive the cross-sectional sampling mechanism (2) to be transversely moved above the material conveyor belt (1) along its length direction.

8. The online detection and conveying equipment according to claim 1, characterized in that: The invention also comprises a detection and return mechanism (24), wherein the detection and return mechanism (24) is arranged above the material conveyor belt (1), and comprises a vibrating feeder (25), a return conveyor belt (26), and a sample detection device (27), wherein the vibrating feeder (25) comprises a feed opening (28), the return conveyor belt (26) is arranged below the feed opening (28), and the sample detection device (27) comprises a detection sensor (29), and the detection sensor (29) is arranged above the return conveyor belt (26).

9. The online detection and conveying equipment according to claim 8, characterized in that: The detection and return mechanism (24) is located behind the sampling area (3) along the running direction of the material conveyor belt (1).

10. The online detection and conveying equipment according to claim 8, characterized in that: The sample detection device (27) is a three-dimensional scanner.

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