Spherical graphite production line central control detection device and detection method thereof

Abstract

The invention discloses a spherical graphite production line central control detection device and a detection method thereof, and belongs to the technical field of graphite production detection. The spherical graphite production line central control detection device comprises a plurality of temporary storage bins; the end, away from the first inclined conveying pipe, of the second inclined conveying pipe communicates with a material suction pump, the end, away from the second inclined conveying pipe, of the material suction pump communicates with a hundred dry type detector, and screened graphite is conveyed into the hundred dry type detector again. Part of unqualified products are removed from screened graphite, so that the detection difficulty is reduced in the secondary detection process of the hundred dry detector, only the qualified products after primary screening need to be subjected to laser detection, and vibration is intermittently generated through the micro electromagnet group and the first electromagnet group in the detection process, so that the detection efficiency is improved. Therefore, the detection speed is accelerated, and the detection accuracy and detection efficiency are further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of graphite production detection, and in particular to a central control detection device and a detection method for a spherical graphite production line. Background Art

[0002] In the production process of spherical graphite, the central control detection device plays a vital role in ensuring the stable operation of the production line and the consistency of product quality. With the widespread application of graphite materials in the fields of lithium-ion battery negative electrode materials, the quality requirements for spherical graphite are also increasing. Traditional graphite production line detection methods often have problems such as low detection efficiency, insufficient accuracy, and low degree of automation. Especially in the closed spherical graphite production line, due to the particularity of the production environment, traditional detection methods are difficult to achieve online, real-time, and accurate detection. This makes it difficult to monitor the product quality on the production line in a timely and effective manner, affecting the product qualification rate and production efficiency.

[0003] In the patent named "A central control detection device and detection method for a spherical graphite production line" and the patent publication number: CN118443891B, a spherical graphite production line is proposed. The equipment adopts a series production method. After the first processing, it is sent to the next equipment through a pipeline for processing, and the cycle continues until the last finished product silo is packaged and tested. The product tester takes samples from the finished product silo for testing. In the actual production process, due to the closed pipeline, it is impossible to detect the processing conditions of each device on the product, the wear of wearing parts, and the sealing condition analysis. The existing spherical graphite production line and the Baxter dry detector are used to upgrade the equipment, install sampling tubes at the unloading ends of finished products, semi-finished products, and tailings, and control the opening and closing of the sampling tubes through electric butterfly valves. The spherical graphite materials on the production line are negatively pressured and transported to the collection bin by a negative pressure vacuum pump. The operators regularly sample and detect each production equipment on the spherical graphite production line, so as to eliminate quality accidents, improve product recovery rate, and improve equipment utilization rate. However, during the long-term detection process of the Baxter dry detector, because the internal detection of the Baxter dry detector uses laser particle size measurement technology for optical detection, after a large amount of graphite enters the instrument, the stacking of graphite may cause measurement errors of optical components. For this reason, a central control detection device and a detection method for a spherical graphite production line are proposed. Summary of the invention

[0004] The purpose of the present invention is to provide a central control detection device and a detection method for a spherical graphite production line to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A central control detection device for a spherical graphite production line, comprising a plurality of temporary storage bins. At the discharge port positions of the plurality of temporary storage bins, third inclined conveying pipes are connected. The ends of the plurality of third inclined conveying pipes away from the temporary storage bins are connected to a conveying and detecting structure. At the middle position of the third inclined conveying pipe, an inclined feeding bin is integrally formed, and a two-stage screening structure is connected inside the inclined feeding bin; The cross-section of the inclined feeding bin is a right trapezoid, which is used to make the graphite roll onto the two-stage screening structure through its own inclination angle and gravity to form primary screened graphite powder; The two-stage screening structure includes an elastic screen assembly. A magnetic attraction assembly is installed outside the elastic screen assembly. The elastic screen assembly is installed inside the inclined feeding bin. The elastic screen assembly generates vibration and folding through its own elasticity and in cooperation with the magnetic attraction assembly to accelerate the screening of graphite powder and form secondary screened graphite powder.

[0006] Preferably, the inclined feeding bin has a two-way gradient structure. The elastic screen assembly includes a medium-soft screen, a section of hard screen, a segmented soft screen, and a second section of hard screen that are connected to each other. The magnetic attraction structure includes a plurality of micro-electromagnet groups, and the plurality of micro-electromagnet groups are fixedly connected to the bottoms of the medium-soft screen, the section of hard screen, the segmented soft screen, and the second section of hard screen. A plurality of first electromagnet groups are connected to the inner bottom wall of the inclined feeding bin.

[0007] Preferably, the magnetic attraction assembly further includes two second electromagnet groups, and the two second electromagnet groups are integrally formed above the second section of hard screen. Side electromagnets are fixedly connected to the side wall surface of the inclined feeding bin.

[0008] Preferably, a plurality of inclined spray holes are formed outside the second electromagnet group. An air storage tank is installed outside the temporary storage bin, and a plurality of pulse valves are installed outside the air storage tank. The air outlet of one of the pulse valves is connected to the air inlet of the inclined spray hole through a conveying pipe.

[0009] Preferably, the conveying and detecting structure includes a plurality of first inclined conveying pipes. The plurality of first inclined conveying pipes are respectively connected to the ends of the third inclined conveying pipes away from the temporary storage bins. At the discharge port position of the first inclined conveying pipe, a second inclined conveying pipe is connected. The end of the second inclined conveying pipe away from the first inclined conveying pipe is connected to a suction pump. The end of the suction pump away from the second inclined conveying pipe is connected to a Baiter dry detector. The discharge ports of the plurality of third inclined conveying pipes are all inclined towards the direction of the first inclined conveying pipe. The position of the feed port of the third inclined conveying pipe is higher than the position of the first inclined conveying pipe. The first inclined conveying pipe gradually inclines towards the suction pump at the end towards the second inclined conveying pipe. The position heights of the Baiter dry detector and the suction pump are both lower than those of the plurality of temporary storage bins. An electric control valve is installed outside the third inclined conveying pipe.

[0010] Preferably, two inclined guide plates are fixedly connected to the elastic screen assembly. One side where the two inclined guide plates are adjacent inclines towards the position of the first inclined conveying pipe. A plurality of triangular dispersion guide columns are fixedly connected to the elastic screen assembly, and the triangular dispersion guide columns are arranged in a triangular manner.

[0011] Preferably, a metering sensor is installed at the bottom of the inclined feed bin.

[0012] Preferably, discharge pipe orifices are formed outside the inclined feed bin, and a baffle is hinged inside the discharge pipe orifice.

[0013] Preferably, a one-way valve plate is hinged at the air outlet position of the inclined spray hole.

[0014] The present invention also proposes a method for central control detection in a spherical graphite production line, including the following steps: S1. During the classification of intermediate products in production, when the graphite product enters the temporary storage bin, a suction force is generated by starting the suction pump. When the suction pump generates suction, the graphite products in multiple temporary storage bins are sucked into the inclined feed bin. Through the inclined state of the inclined feed bin, the graphite entering the inclined feed bin is continuously dispersed and inclined downward for secondary screening to obtain primary pre-screened graphite powder. S2. When the graphite product enters the inclined feed bin, the suction pump is turned off, so that the graphite product naturally falls by gravity. During the natural fall of the graphite product, the elastic screen assembly is used to detect and classify the graphite product, and the classification time is 1 - 3 minutes. S3. After the graphite particles enter the surface of the elastic screen assembly, the magnetic attraction assembly drives the elastic screen assembly to continuously vibrate, and different vibration amplitudes are adjusted according to the amount of incoming graphite particles, or the local position of the elastic screen assembly is started at a fixed point according to the accumulation of the graphite amount for screening. After screening, secondary pre-screened graphite powder is obtained. S4. After the secondary pre-screened graphite powder is screened, the second electromagnet group is started again. Through the adsorption between the second electromagnet group and the first electromagnet group, the elastic screen assembly is driven to bend up and down, expanding the screen holes in the elastic screen assembly, and cooperating with the rebound vibration force generated by the bending to clean the graphite particles attached to the surface of the elastic screen assembly.

[0015] S5. After the graphite product is pre-screened and classified, the suction pump is started again to generate suction to transport the classified graphite product to the BET dry detector, and the sphericity and particle shape of the classified product are detected by the BET dry detector.

[0016] Compared with the prior art, the beneficial effects of the present invention are: In the present invention, during the extraction detection process, the third inclined conveying pipe and the first inclined conveying pipe which are inclined can enable the suction pump to save part of the suction force during the suction process, and can avoid part of the graphite staying inside the pipeline during the graphite conveying process, resulting in the graphite staying inside the pipeline during the secondary suction detection entering the Baxter dry detector together with the graphite during the secondary suction detection, reducing the error rate of the Baxter dry detector detection.

[0017] In the present invention, by changing the originally conveyed third inclined conveying pipe to a flat shape and cooperating with the elastic screen assembly inside to conduct a primary screening on the graphite to be detected, the graphite after screening is conveyed into the Baxter dry detector again. After screening, part of the unqualified products are removed from the graphite, reducing the detection difficulty during the secondary detection by the Baxter dry detector. Only the qualified products after the primary screening need to be laser-detected. And during the detection process, vibrations are intermittently generated by the micro electromagnet group and the first electromagnet group, thereby accelerating the detection speed and further improving the detection accuracy and detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of an embodiment of the present invention; Figure 2 is a schematic structural diagram of the elastic screen assembly and the third inclined conveying pipe in an embodiment of the present invention; Figure 3 is a schematic structural diagram of the second electromagnet group and the first electromagnet group in an embodiment of the present invention; Figure 4 is a schematic structural diagram of the conveying pipe and the pulse valve in an embodiment of the present invention; Figure 5 is a schematic structural diagram of the micro electromagnet group in an embodiment of the present invention; Figure 6 is a schematic structural diagram of the medium soft screen, the first section of hard screen plate, the sectional soft screen and the second section of hard screen in an embodiment of the present invention; Figure 7 is an embodiment of the present invention Figure 6 the enlarged structural diagram of area A in; Figure 8 is a sectional structural diagram of the third inclined conveying pipe in an embodiment of the present invention.

[0019] In the figure: 100, temporary storage bin; 101, first inclined conveying pipe; 102, second inclined conveying pipe; 103, suction pump; 104, Baxter dry detector; 105, third inclined conveying pipe; 106, elastic screen assembly; 1061, medium-soft screen; 1062, first section of hard screen plate; 1063, segmented soft screen; 1064, second section of hard screen; 107, metering sensor; 108, electric control valve; 200, first electromagnet group; 201, second electromagnet group; 202, micro electromagnet group; 300, side electromagnet; 400, inclined spray hole; 401, conveying pipe; 402, pulse valve; 403, air storage tank; 500, discharge pipe opening; 501, baffle; 600, inclined guide plate; 700, triangular dispersion guide column; 800, check valve piece. Specific implementation mode

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Embodiment 1. As Figure 1 shown, a central control detection device for a spherical graphite production line in this application includes a plurality of temporary storage bins 100. Third inclined conveying pipes 105 are connected to the discharge port positions of the plurality of temporary storage bins 100. One ends of the plurality of third inclined conveying pipes 105 far from the temporary storage bins 100 are connected to a first inclined conveying pipe 101. A second inclined conveying pipe 102 is connected to the discharge port position of the first inclined conveying pipe 101. One end of the second inclined conveying pipe 102 far from the first inclined conveying pipe 101 is connected to a suction pump 103. One end of the suction pump 103 far from the second inclined conveying pipe 102 is connected to a Baxter dry detector 104. The discharge ports of the plurality of third inclined conveying pipes 105 are all inclined towards the first inclined conveying pipe 101. The position of the feed port of the third inclined conveying pipe 105 is higher than that of the first inclined conveying pipe 101. The first inclined conveying pipe 101 gradually inclines towards the suction pump 103 at one end towards the second inclined conveying pipe 102. The position heights of the Baxter dry detector 104 and the suction pump 103 are both lower than those of the plurality of temporary storage bins 100. An electric control valve 108 is installed outside the third inclined conveying pipe 105.

[0022] Specifically, during the use process, when it is necessary to detect spherical graphite during the production process, the suction pump 103 can be started to cooperate with the second inclined conveying pipe 102, the first inclined conveying pipe 101, and the third inclined conveying pipe 105 to extract the spherical graphite inside the temporary storage bin 100. When part of the spherical graphite is drawn into the third inclined conveying pipe 105, the spherical graphite will enter the first inclined conveying pipe 101 and the second inclined conveying pipe 102 along with the third inclined conveying pipe 105, and is conveyed to the Baiter dry detector 104 through the suction pump 103 for detection. During the detection of spherical graphite, the third inclined conveying pipe 105 is in an inclined state. Therefore, during the conveying process of spherical graphite, even without the suction force of the suction pump 103, the spherical graphite will gradually roll into the first inclined conveying pipe 101 by gravity, and the orientation of the first inclined conveying pipe 101 is also inclined towards the second inclined conveying pipe 102 and the suction pump 103. After the third inclined conveying pipe 105 enters the first inclined conveying pipe 101, the spherical graphite inside the first inclined conveying pipe 101 will also gradually roll towards the suction pump 103 by gravity.

[0023] The technical solution in the above embodiment of the present application has at least the following technical effects or advantages: Compared with the prior art, in this embodiment, during the extraction and detection process, the inclined third inclined conveying pipe 105 and the first inclined conveying pipe 101 can enable the suction pump 103 to save part of the suction force during the suction process, and can prevent some graphite from staying inside the pipeline during the graphite conveying process, resulting in the graphite staying inside the pipeline during the secondary suction detection entering the Baiter dry detector 104 together with the graphite during the secondary suction detection, reducing the error rate of the Baiter dry detector 104.

[0024] Embodiment 2. Considering that although the inclined first inclined conveying pipe 101 and the third inclined conveying pipe 105 can be faster and reduce the residue of spherical graphite, when a large amount of graphite enters the Baiter dry detector 104, although unqualified spherical graphite can be detected, the accumulation of a large amount of graphite may cause detection errors in the Baiter dry detector 104. To solve the above technical problems, the present application proposes the following technical solution: Such as Figures 2 - 6As shown, the middle position of the third inclined conveying pipe 105 is flat, gradually narrowing on the side close to the first inclined conveying pipe 101 and gradually widening on the side close to the temporary storage bin 100. An elastic screen assembly 106 is integrally formed inside the flat third inclined conveying pipe 105. The elastic screen assembly 106 includes a medium-soft screen 1061 at the middle position. Both the upper and lower sides of the medium-soft screen 1061 are fixedly connected to the inner wall of the flat third inclined conveying pipe 105. One section of hard screen plate 1062 is integrally formed on both the left and right sides of the medium-soft screen 1061. One section of segmented soft screen 1063 is integrally formed on the side of one section of hard screen plate 1062 away from the medium-soft screen 1061. One section of second hard screen 1064 is integrally formed on the side of one section of segmented soft screen 1063 away from one section of hard screen plate 1062. A plurality of screen holes are formed on the outsides of the medium-soft screen 1061, one section of hard screen plate 1062, one section of segmented soft screen 1063, and one section of second hard screen 1064. A plurality of micro-electromagnet groups 202 are fixedly connected to the bottoms of the medium-soft screen 1061, one section of hard screen plate 1062, one section of segmented soft screen 1063, and one section of second hard screen 1064. A plurality of first electromagnet groups 200 are fixedly connected to the inner bottom wall of the flat third inclined conveying pipe 105.

[0025] Specifically, during the use process, when the suction pump 103 is started, the aspirated spherical graphite will enter the inside of the flat third inclined conveying pipe 105. When the spherical graphite particles enter the inside of the third inclined conveying pipe 105, they will fall onto the elastic screen assembly 106. After the spherical graphite particles fall onto the elastic screen assembly 106, as the spherical graphite particles move on the elastic screen assembly 106, the graphite particles with smaller particle sizes, damaged shapes, and non-spherical shapes can be screened out, and the unqualified graphite particles are pre-screened, and only the relatively qualified spherical graphite is left to continue to be conveyed by the suction pump 103 into the internal part of the Baite dry detector 104, and then secondary detection is carried out by laser.

[0026] As Figure 3 shown, a metering sensor 107 is installed at the bottom of the flat third inclined conveying pipe 105.

[0027] Specifically, a metering sensor 107 is also installed at the bottom of the third inclined conveying pipe 105. With the setting of the metering sensor 107, when the suction pump 103 continuously generates suction to suck spherical graphite into the third inclined conveying pipe 105, it is weighed by the metering sensor 107. When the spherical graphite enters the third inclined conveying pipe 105 and reaches a certain weight after being weighed by the metering sensor 107, the weight information is transmitted to the central control unit through the metering sensor 107, and the central control unit stops the suction pump 103 from continuously generating suction, or further reduces the suction to reduce the situation where spherical graphite quickly enters the first inclined conveying pipe 101, so that the spherical graphite stays on the elastic screen assembly 106. Considering that the spherical graphite is too tiny as a whole and cannot be completely screened by the elastic screen assembly 106 when piled up, therefore, after the spherical graphite is located on the elastic screen assembly 106, multiple first electromagnet groups 200 and multiple micro-electromagnet groups 202 are started. The multiple first electromagnet groups 200 and micro-electromagnet groups 202 are set to be started and closed periodically by the controller, and the energization amounts of the first electromagnet groups 200 and micro-electromagnet groups 202 also change periodically during the periodic start and close. In the case where the first electromagnet groups 200 and micro-electromagnet groups 202 are periodically attracted to each other, it can drive vibrations between the medium-soft screen 1061, the first hard screen plate 1062, the segmented soft screen 1063, and the second hard screen 1064. In the case where the first electromagnet groups 200 and micro-electromagnet groups 202 are periodically attracted to each other, it can make the medium-soft screen 1061, the first hard screen plate 1062, the segmented soft screen 1063, and the second hard screen 1064 vibrate continuously. In the case of continuous vibration, the piled-up spherical graphite particles can be dispersed, and in the case of continuous vibration, the screening of the spherical graphite particles can be further accelerated, and the unqualified spherical graphite particles can be screened out more quickly. After the unqualified spherical graphite particles are screened out, the suction pump 103 is started again to suck the remaining relatively qualified spherical graphite particles into the internal of the Baite dry detector 104, so as to conduct precise screening again through the Baite dry detector 104. The pre-mechanical screening method can reduce the screening error rate during the detection process of the Baite dry detector 104, and because the graphite is quantitatively conveyed into the elastic screen assembly 106 for screening each time, after the screening by the elastic screen assembly 106, the weight of the unqualified spherical graphite screened out is weighed by the third inclined conveying pipe 105, and the remaining spherical graphite is conveyed into the Baite dry detector 104 for secondary screening. Through multiple screenings and sievings, the accuracy during the processing and detection of spherical graphite is further enhanced, and the detection accuracy rate is improved.

[0028] Such as Figures 2 - 3As shown, a plurality of triangular dispersion guide columns 700 are fixedly connected to the elastic screen assembly 106, and the triangular dispersion guide columns 700 are arranged in a triangular manner.

[0029] Specifically, through the arrangement of the plurality of triangular dispersion guide columns 700, when the spherical graphite is sucked into the interior of the third inclined conveying pipe 105 by the suction force of the material suction pump 103, the spherical graphite entering the interior of the third inclined conveying pipe 105 will be dispersed by the plurality of triangular dispersion guide columns 700, and the spherical graphite that is sucked in and piled up together will be evenly dispersed on the surface of the elastic screen assembly 106, thereby overall accelerating the pre-detection screening in the production process of the spherical graphite.

[0030] Furthermore, after the spherical graphite enters the interior of the third inclined conveying pipe 105 and the metering sensor 107 detects an increase in the weight inside the third inclined conveying pipe 105, the electric control valve 108 is closed through the central controller, thereby preventing the spherical graphite during the processing from falling into the interior of the third inclined conveying pipe 105 again.

[0031] As Figures 2 - 3 shown, two inclined guide plates 600 are fixedly connected to the elastic screen assembly 106, and the adjacent sides of the two inclined guide plates 600 are inclined towards the position of the first inclined conveying pipe 101.

[0032] Specifically, after the spherical graphite is screened by the elastic screen assembly 106, it will centrally move towards the side of the third inclined conveying pipe 105 close to the first inclined conveying pipe 101. During the process of centrally moving towards the side close to the first inclined conveying pipe 101, in order to centrally convey the graphite into the interior of the first inclined conveying pipe 101, the screened graphite is guided by the inclined guide plates 600 with inclined shapes on both sides, so as to centrally guide the screened graphite into the interior of the first inclined conveying pipe 101.

[0033] The technical solutions in the embodiments of the present application described above have at least the following technical effects or advantages: Compared with Embodiment 1, in this embodiment, the original third inclined conveying pipe 105 for conveying is changed to a flat shape and cooperates with the elastic screen assembly 106 inside to perform a primary screening on the graphite to be detected. After the screened graphite is conveyed into the interior of the Baiter dry detector 104 again, some unqualified products are removed from the screened graphite, which reduces the detection difficulty during the secondary detection by the Baiter dry detector 104. Only the qualified products after the primary screening need to be laser-detected, and during the detection process, vibrations are intermittently generated by the micro-electromagnet group 202 and the first electromagnet group 200, thereby accelerating the detection speed and further improving the detection accuracy and detection efficiency.

[0034] Embodiment 3. Considering that during the screening process of spherical graphite, a large amount of graphite will pass through the sieve holes outside the elastic sieve mesh assembly 106. After long-term use, it is inevitable that some spherical graphite will be blocked inside the sieve holes, or some unqualified spherical graphite, that is, hemispherical or irregularly shaped spherical graphite, will stay on the elastic sieve mesh assembly 106. This results in these graphite participating in the next detection and screening process, causing the residue of the previous screening and detection to overlap with the products of the next detection and affecting the detection effect. To solve the above technical problems, the present application proposes the following technical solutions: As Figures 3 - 6 shown, a second electromagnet group 201 is integrally formed above the second-stage hard sieve mesh 1064, and a side electromagnet 300 is fixedly connected to the side wall surface of the flat third inclined conveying pipe 105.

[0035] Specifically, during the use process, when the spherical graphite passes through the surface of the elastic sieve mesh assembly 106 and is screened, the staff activates the second electromagnet group 201 and the first electromagnet group 200 at a position parallel to the second electromagnet group 201, so that the second electromagnet group 201 and the first electromagnet group 200 at a position parallel to the second electromagnet group 201 generate a repulsive force. In the case of generating a repulsive force, the two second electromagnet groups 201 will simultaneously drive the second-stage hard sieve mesh 1064 and the first-stage hard sieve mesh plate 1062 to bend upward to a certain extent around the medium soft sieve mesh 1061 as the center point. When the bending reaches a certain extent, the power supply to the second electromagnet group 201 and the micro electromagnet group 202 is cancelled, so that they no longer generate a repulsive force. In the case of the disappearance of the repulsive force, the first-stage hard sieve mesh plate 1062 and the second-stage hard sieve mesh 1064 will quickly rebound due to the disappearance of the bending thrust. In the case of quickly generating a rebound, it will cause relatively violent vibrations of the medium soft sieve mesh 1061, the first-stage hard sieve mesh plate 1062, the segmented soft sieve mesh 1063 and the second-stage hard sieve mesh 1064. In the case of generating relatively violent vibrations, the spherical graphite products located inside the sieve holes of the medium soft sieve mesh 1061, the first-stage hard sieve mesh plate 1062, the segmented soft sieve mesh 1063 and the second-stage hard sieve mesh 1064 can be shaken off.

[0036] Further, when using two sets of second electromagnets 201, the magnetic adsorption direction of the two sets of second electromagnets 201 can also be changed by changing the energization conditions of the two sets of second electromagnets 201. During the adsorption process, the two sets of second electromagnets 201 can be adsorbed towards the bottom of the inclined feed bin, so that the first hard screen plate 1062, the segmented soft screen 1063, and the second hard screen 1064 are turned downwards. In the case of turning downwards, the spherical graphite particles staying on the first hard screen plate 1062, the segmented soft screen 1063, and the second hard screen 1064 can quickly fall to the bottom of the inclined feed bin.

[0037] Further, the second electromagnet group 201 and the first electromagnet group 200 at a position parallel to the second electromagnet group 201 can also be started, so that the second electromagnet group 201 and the first electromagnet group 200 at a position parallel to the second electromagnet group 201 generate mutual attraction. In the case of generating mutual attraction, the second hard screen 1064 and the first hard screen plate 1062 are bent downwards around the medium soft screen 1061 as the center point. In the case of bending downwards, the graphite remaining on the upper surfaces of the medium soft screen 1061, the first hard screen plate 1062, the segmented soft screen 1063, and the second hard screen 1064 will fall into the interior of the third inclined conveyor pipe 105 by gravity. And after the power supply to the second electromagnet group 201 and the first electromagnet group 200 is cancelled, the first hard screen plate 1062 and the second hard screen 1064 will rebound again due to the disappearance of the bending thrust. In the case of quickly rebounding, relatively violent vibrations will be generated on the medium soft screen 1061, the first hard screen plate 1062, the segmented soft screen 1063, and the second hard screen 1064, and the spherical graphite products remaining in the screen holes of the medium soft screen 1061, the first hard screen plate 1062, the segmented soft screen 1063, and the second hard screen 1064 will be shaken off through the reverse vibrations.

[0038] Further, in order to ensure that the second electromagnet group 201 will not be attracted by the first electromagnet group 200 and cause the bending of the elastic screen assembly 106 when mutual attraction is generated between the micro electromagnet group 202 and the multiple first electromagnet groups 200. Therefore, during the startup process of the micro electromagnet group 202, the side electromagnet 300 is started simultaneously. In the case of starting the side electromagnet 300, the second electromagnet group 201 will be adsorbed, and the adsorption force should be greater than the periodic adsorption generated between the first electromagnet group 200 and the micro electromagnet group 202, so as to avoid the overall downward or upward bending of the elastic screen assembly 106 during the shaking of the elastic screen assembly 106, resulting in graphite falling into the interior of the third inclined conveyor pipe 105.

[0039] Further, when the second electromagnet group 201 moves and rebounds with the medium-soft screen 1061 and the segmented soft screen 1063 at the micro-bending points of the second-stage hard screen 1064 and the first-stage hard screen plate 1062, the second electromagnet group 201 will hit the inner wall of the third inclined delivery pipe 105, thereby generating an impact vibration on the inner wall of the third inclined delivery pipe 105. The vibration generated by the impact can shake off the graphite attached to the inner wall surface of the third inclined delivery pipe 105, reducing the situation of graphite adhering to the inner wall surface of the third inclined delivery pipe 105.

[0040] Further, the periodic energization and de-energization of the micro-electromagnet group 202 and the first electromagnet group 200 change the local stiffness distribution of the screen, enabling the vibration frequency to cover a wide frequency band of 5 - 50 Hz, matching the resonance frequencies of different particle sizes, and disintegrating electrostatic adsorption and mechanical clamping.

[0041] As Figure 8 shown, discharge openings 500 are provided on the outside of the flat-shaped third inclined delivery pipe 105, and a baffle 501 is hinged inside the discharge opening 500.

[0042] Specifically, when the spherical graphite after screening falls below the third inclined delivery pipe 105, after the baffle 501 is opened, the unqualified spherical graphite inside the third inclined delivery pipe 105 will fall out of the outlet of the discharge opening 500 by gravity and along the bottom wall surface of the inner wall of the third inclined delivery pipe 105, thereby discharging the unqualified spherical graphite from the inside of the third inclined delivery pipe 105.

[0043] The technical solutions in the embodiments of the present application described above have at least the following technical effects or advantages: Compared with Embodiment 2, in this embodiment, by energizing the second electromagnet group 201 and part of the first electromagnet group 200 to generate mutual attraction and mutual repulsion, the elastic screen assembly 106 is driven to undergo a bending deformation through the generated attraction and repulsion. After complete deformation, the attraction and repulsion are cancelled again, thereby generating a large vibration through the rebound. The large vibration generated by the rebound can shake off the spherical graphite remaining on the surface and inside the screen holes of the elastic screen assembly 106, reducing the phenomenon of spherical graphite remaining on the surface of the elastic screen assembly 106 and avoiding the phenomenon that the remaining spherical graphite affects the next detection.

[0044] Embodiment 4: Considering that during use, although the phenomenon of spherical graphite adhering to the surface of the elastic screen assembly 106 and the inside of the sieve hole can be reduced by large vibration, in the production process of spherical graphite, the spherical graphite is relatively small, and even after multiple vibrations, there may still be a phenomenon that tiny spherical graphite is tightly attached to the surface of the elastic screen assembly 106. Therefore, in view of the above technical problems, the present application proposes the following technical solutions to solve the above technical problems, specifically: like Figure 6 and Figure 7 As shown, a plurality of inclined spray holes 400 are provided on the outside of the second electromagnet group 201, a gas storage tank 403 is installed on the outside of the temporary storage bin 100, a plurality of pulse valves 402 are installed on the outside of the gas storage tank 403, an air outlet of one of the pulse valves 402 is connected to a delivery pipe 401, and both air outlets of the delivery pipe 401 pass through the outer wall of the third inclined delivery pipe 105 and are connected to the air inlet of the inclined spray hole 400.

[0045] Specifically, during use, after an inspection, the staff can start the pulse valve 402 outside the gas tank 403. By starting the pulse valve 402 connected to the delivery pipe 401, the gas stored in the gas tank 403 can be transmitted to the inclined spray hole 400 through the delivery pipe 401, and the high-pressure gas can be quickly delivered to the surface of the elastic screen assembly 106 through multiple inclined spray holes 400, and the surface of the elastic screen assembly 106 is flushed with high-pressure gas. After flushing with high-pressure gas, the phenomenon of spherical graphite being stuck on the surface of the elastic screen assembly 106 and the inside of the sieve hole can be reduced. At this time, the second electromagnet group 201 is used again to make the elastic screen assembly 106 vibrate more violently, which can further significantly reduce the phenomenon of unqualified spherical graphite remaining on the surface of the elastic screen assembly 106.

[0046] Furthermore, a one-way valve plate 800 is hinged at the outlet of the inclined spray hole 400. Through the setting of the one-way valve plate 800, the inclined spray hole 400 can be closed by the one-way valve plate 800 after the gas is sprayed out, thereby preventing spherical graphite from entering the inclined spray hole 400 and causing blockage.

[0047] Furthermore, by energizing the second electromagnet group 201 and cooperating with the inclined spray hole 400, the gas spray direction of the inclined spray hole 400 can be adjusted, so as to perform gas cleaning on different positions inside the warehouse body. At the same time, the fatigue area of ​​the screen can be predicted through the metering sensor 107 and vibration spectrum analysis, and local enhanced vibration or airflow flushing can be automatically triggered.

[0048] Furthermore, the elastic screen assembly 106 driven by the first electromagnet group 200 and the second electromagnet group 201 vibrates (amplitude ±2 mm, frequency 20 Hz) in synchronization with the pulsed air flow (pulse width 50 ms) of the inclined spray holes 400, forming a chain reaction of "vibration loosening - air flow stripping".

[0049] The technical solutions in the embodiments of the present application at least have the following technical effects or advantages: Compared with Embodiment 3, in this embodiment, the high-pressure gas stored inside the gas storage tank 403 and the inclined spray holes 400 opened inside the second electromagnet group 201 can first spray high-pressure gas on the surface of the elastic screen assembly 106, and first clean the surface of the elastic screen assembly 106 through the high-pressure gas spray. After the first cleaning, vibratory cleaning is carried out, or vibratory cleaning is carried out first and then high-pressure gas cleaning is carried out again at the end, so as to further reduce the phenomenon that unqualified spherical graphite remains on the surface of the elastic screen assembly 106, and reduce the phenomenon that unqualified spherical graphite remains on the surface of the elastic screen assembly 106 and affects the next detection. After overall pre-screening, the false alarm rate of the Baiter dry detector 104 drops by 60%, and the detection deviation caused by residual particle interference is reduced to <0.5%.

[0050] The present invention also provides a method for on-line detection and control in a spherical graphite production line, including the following steps: S1. In the classification of intermediate products during production, when the graphite product enters the temporary storage bin 100, the suction pump 103 is started to generate suction. When the suction pump 103 generates suction, the graphite products in the multiple temporary storage bins 100 are sucked into the inclined feeding bin. Through the inclined state of the inclined feeding bin, the graphite products entering the inclined feeding bin are continuously dispersed and inclined downward for secondary screening to obtain primary pre-screened graphite powder. S2. When the graphite product enters the inclined feeding bin, the suction pump 103 is turned off, so that the graphite product naturally falls by gravity. During the natural fall of the graphite product, the elastic screen assembly 106 is used to detect and classify the graphite product, and the classification time is 1 - 3 min. S3. After the graphite particles enter the surface of the elastic screen assembly 106, the magnetic attraction assembly drives the elastic screen assembly 106 to continuously vibrate, and adjusts different vibration amplitudes according to the different amounts of entering graphite particles, or starts the local position of the elastic screen assembly 106 at a fixed point according to the accumulation of graphite amount for screening. After screening, secondary pre-screened graphite powder is obtained. S4. After the screening of the secondary pre-screened graphite powder is completed, start the second electromagnet group 201 again. Drive the elastic screen assembly 106 to bend up and down through the adsorption between the second electromagnet group 201 and the first electromagnet group 200, expand the screen holes in the elastic screen assembly 106, and cooperate with the rebound vibration force generated by the bending to clean the graphite particles attached to the surface of the elastic screen assembly 106.

[0051] S5. After the graphite products are pre-screened and classified, start the suction pump 103 again to generate suction to transport the classified graphite products to the BET dry detector 104, and detect the sphericity and particle shape of the classified products through the BET dry detector 104.

[0052] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A central control detection device for a spherical graphite production line, comprising a plurality of temporary storage bins, characterized in that: The outlets of the plurality of temporary storage bins are all connected to a third inclined conveying pipe, one end of the plurality of third inclined conveying pipes away from the temporary storage bin is connected to a conveying detection structure, an inclined conveying bin is integrally formed at the middle of the third inclined conveying pipe, and the interior of the inclined conveying bin is connected to two screen structures; The cross section of the inclined feeding bin is a right-angle trapezoid, which is used to make the graphite roll onto the second screen structure through its own inclination angle and gravity, forming a first-level screening graphite powder; The secondary screen structure includes an elastic screen assembly, a magnetic suction assembly is installed on the outside of the elastic screen assembly, and the elastic screen assembly is installed inside the inclined feed bin. The elastic screen assembly produces vibration and folding through its own elasticity and the magnetic suction assembly, thereby accelerating the screening of graphite powder and forming a secondary screening of graphite powder.

2. A central control detection device for a spherical graphite production line according to claim 1, characterized in that: The inclined feed bin has a bidirectional gradient structure. The elastic screen assembly includes a middle soft screen, a first hard screen, a segmented soft screen and a second hard screen that are interconnected. The magnetic structure includes multiple micro electromagnet groups, and the multiple micro electromagnet groups are fixedly connected to the bottom of the middle soft screen, the first hard screen, the segmented soft screen and the second hard screen. Multiple first electromagnet groups are connected to the bottom wall of the inclined feed bin.

3. A central control detection device for a spherical graphite production line according to claim 2, characterized in that: The magnetic suction component also includes two second electromagnet groups, which are integrally formed above the two sections of hard screens, and the side electromagnets are fixedly connected to the side walls of the inclined feed bin.

4. A central control detection device for a spherical graphite production line according to claim 3, characterized in that: A plurality of inclined spray holes are provided on the outside of the second electromagnet group, an air storage tank is installed on the outside of the temporary storage bin, and a plurality of pulse valves are installed on the outside of the air storage tank, wherein the air outlet of one of the pulse valves is connected with the air inlet of the inclined spray hole through a delivery pipe.

5. A central control detection device for a spherical graphite production line according to claim 1, characterized in that: The conveying and detection structure includes a plurality of first inclined conveying pipes, which are respectively connected with one end of the third inclined conveying pipe away from the temporary storage bin, the discharge port of the first inclined conveying pipe is connected with a second inclined conveying pipe, the end of the second inclined conveying pipe away from the first inclined conveying pipe is connected with a suction pump, the end of the suction pump away from the second inclined conveying pipe is connected with a Baxter dry detector, the discharge ports of the plurality of third inclined conveying pipes are all inclined toward the first inclined conveying pipe, the feed port position of the third inclined conveying pipe is higher than the position of the first inclined conveying pipe, the first inclined conveying pipe gradually inclines toward the position of the suction pump toward one end of the second inclined conveying pipe, the positions of the Baxter dry detector and the suction pump are both lower than the plurality of temporary storage bins, and an electric control valve is installed on the outside of the third inclined conveying pipe.

6. A central control detection device for a spherical graphite production line according to claim 5, characterized in that: Two inclined guide plates are fixedly connected to the elastic screen assembly, and one adjacent side of the two inclined guide plates is inclined toward the position of the first inclined conveying pipe. A plurality of triangular dispersed guide columns are fixedly connected to the elastic screen assembly, and the triangular dispersed guide columns are arranged in a triangular manner.

7. A central control detection device for a spherical graphite production line according to claim 6, characterized in that: A metering sensor is installed at the bottom of the inclined feeding bin.

8. A central control detection device for a spherical graphite production line according to claim 7, characterized in that: The outside of the inclined feeding bin is provided with a discharge pipe opening, and the inside of the discharge pipe opening is hinged with a baffle.

9. A central control detection device for a spherical graphite production line according to claim 4, characterized in that: A one-way valve sheet is hinged at the air outlet of the inclined spray hole.

10. A central control detection method for a spherical graphite production line, using a central control detection device for a spherical graphite production line as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1. In the classification of intermediate products in production, when the graphite product enters the temporary storage bin, suction is generated by starting the suction pump. When the suction pump generates suction, the graphite products in multiple temporary storage bins are sucked into the inclined feeding bin. The graphite entering the inclined feeding bin is continuously dispersed and tilted downward for secondary screening through the inclined state of the inclined feeding bin to obtain primary pre-screened graphite powder; S2. When the graphite product enters the inclined feeding bin, the suction pump is turned off to allow the graphite product to fall naturally by gravity. During the natural falling process of the graphite product, the graphite product is inspected and graded by the elastic screen assembly. The grading time is 1-3 minutes. S3. After the graphite particles enter the surface of the elastic screen assembly, the magnetic suction assembly drives the elastic screen assembly to continuously vibrate, and adjusts the vibration amplitude according to the amount of graphite particles entering, or starts the local position of the elastic screen assembly at a fixed point according to the accumulation of graphite to screen, and obtains the secondary pre-screened graphite powder after the screening is completed; S4, after the secondary pre-screening graphite powder screening is completed, the second electromagnet group is started again, and the elastic screen assembly is driven to bend up and down through the adsorption between the second electromagnet group and the first electromagnet group, so as to expand the sieve holes in the elastic screen assembly, and the graphite particles attached to the surface of the elastic screen assembly are cleaned with the rebound vibration force generated by the bending; S5. After the graphite product is pre-screened and classified, the suction pump is turned on again to generate suction to transport the classified graphite product to the Baxter dry tester, and the sphericity and particle shape of the classified product are tested by the Baxter dry tester.

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