Device for testing content of impurities in carbon black

Abstract

The invention relates to the technical field of carbon black performance testing, in particular to a device for testing the content of impurities in carbon black, which comprises a test bin, a test sieve, a funnel, a receiving disc, a platform scale and a flattening mechanism. The test sieve is mounted in the test bin and is used for sieving the carbon black, so that impurities in the carbon black are retained on the top surface of the test sieve. And the funnel is mounted in the test bin, is positioned below the test sieve, and plays a role in flow guide and collection. And the receiving disc is arranged in the test bin, is positioned below the funnel and is used for receiving the carbon black. The platform scale is arranged in the test bin and located below the bearing disc. And the platform scale is used for weighing the carbon black falling on the receiving tray and the receiving tray. The flattening mechanism is rotatably installed in the test bin, located above the test screen and used for flattening the carbon black on the top face of the test screen, and the screening efficiency is improved. And compared with a whole-process manual operation mode, the labor intensity is reduced, the screening detection efficiency is guaranteed, and automatic screening detection can be achieved easily.

Description

Technical Field

[0001] The invention relates to the technical field of carbon black performance testing, in particular to a device for testing the impurity content in carbon black. Background Art

[0002] Carbon black is a key industrial raw material, widely used in rubber, plastics, inks, coatings, and other fields. In the rubber industry, carbon black serves as a reinforcing agent, and its impurity content affects rubber properties. In the plastics industry, carbon black is used for coloring and conductivity, and impurities affect product appearance and electrical properties. In inks and coatings, carbon black serves as a pigment, and impurities affect color and stability. The content of impurities in carbon black, such as hard carbon, grit, and rust, is a key indicator of its performance, making accurate testing essential.

[0003] At present, the main method for detecting the impurity content in carbon black is the traditional screening method, which requires manual operation throughout the process and has low screening efficiency. Summary of the Invention

[0004] The present invention provides a device for testing the impurity content in carbon black, which is used to solve the problem that the detection of the impurity content in carbon black requires manual operation throughout the entire process and the screening efficiency is low.

[0005] The present invention provides a device for testing the impurity content in carbon black, comprising: test chamber; Test sieve, installed in the test chamber; The funnel is installed in the test chamber and is located below the test sieve; The receiving tray is arranged in the test chamber and is located below the funnel; A platform scale is installed in the test chamber and is located below the receiving tray; The flattening mechanism is rotatably installed in the test chamber and is located above the test sieve.

[0006] In some embodiments, the flattening mechanism comprises: The first transmission rod has a vertical axis and is capable of rotating around its own axis; The first brush is installed at the bottom end of the first transmission rod and can rotate along with the first transmission rod.

[0007] In some embodiments, further comprising: The first driving mechanism is installed on the top of the test chamber and connected to the top end of the first transmission rod, and is used to drive the first transmission rod to rotate.

[0008] In some embodiments, the flattening mechanism comprises: The second transmission rod is vertically arranged and can rotate and move up and down; The third transmission rod is vertically arranged, capable of rotating and moving up and down. The second brush is installed at the bottom end of the second transmission rod and can rotate and move up and down with the second transmission rod. The bow arm has an opening facing downward, and its middle part is installed at the bottom end of the third transmission rod and can rotate and move up and down with the third transmission rod. The bow wire is installed at the bottom of the bow arm.

[0009] In some embodiments, it further includes: The second driving mechanism is installed at the top of the test chamber and can be connected or disconnected from the second transmission rod and the third transmission rod, and is used to drive the second transmission rod and the third transmission rod to rotate. The lifting mechanism is installed at the top of the test chamber, is respectively connected to the top ends of the second transmission rod and the third transmission rod, and can drive the second transmission rod and the third transmission rod to alternately lift and lower.

[0010] In some embodiments, the second driving mechanism includes: The first driving motor is installed at the top of the test chamber; The first sprocket is sleeved on the output shaft of the first driving motor; The clutch is sleeved on the second transmission rod and the third transmission rod; The second sprocket is sleeved outside the clutch and is connected to the first sprocket through the first chain.

[0011] In some embodiments, the lifting mechanism includes: The mounting seat is rotatably installed at the top of the test chamber; The second driving motor is fixedly installed at the top end of the mounting seat; The third sprocket is sleeved on the output shaft of the second driving motor; The second chain is wound around the third sprocket, one end is fixedly connected to the top end of the second transmission rod, and the other end is fixedly connected to the top end of the third transmission rod.

[0012] In some embodiments, the aperture of the test sieve is 850 μm.

[0013] In some embodiments, it further includes: The controller is connected to the platform scale.

[0014] In some embodiments, a sealing cover is provided at the top of the test chamber.

[0015] The beneficial effects of the present invention are as follows: The device for testing the impurity content in carbon black of the present invention is provided with a test chamber, a test sieve, a platform scale, a receiving tray and a flattening mechanism. The test chamber provides a closed screening environment to prevent carbon black from spreading into the working workshop and improve the operating environment. The test sieve is installed in the test chamber and is used for screening carbon black so that the impurities in the carbon black remain on the top surface of the test sieve. The platform scale is used to weigh the carbon black and the receiving tray that fall onto the receiving tray. The flattening mechanism is used to flatten the carbon black on the top surface of the test sieve to improve the screening efficiency. Compared with the method of full manual operation, it reduces the labor intensity, ensures the screening and detection efficiency, and is conducive to realizing automatic screening and detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of some specific embodiments of a device for testing the impurity content in carbon black of the present invention; Figure 2 is a schematic structural diagram of other specific embodiments of a device for testing the impurity content in carbon black of the present invention; Figure 3 is Figure 2 a schematic structural diagram of the second brush in the device for testing the impurity content in carbon black shown; Figure 4 is Figure 2 a schematic combined structural diagram of the bow arm and the bow wire in the device for testing the impurity content in carbon black shown.

[0017] In the drawings, 110, test chamber; 111, sealing cover; 120, test sieve; 130, platform scale; 140, receiving tray; 150, flattening mechanism; 151, first transmission rod; 152, first brush; 153, second transmission rod; 154, third transmission rod; 155, second brush; 156, bow arm; 157, bow wire; 158, adjusting bolt; 160, first driving mechanism; 161, third driving motor; 162, first coupling; 170, second driving mechanism; 171, first driving motor; 172, first sprocket; 173, clutch; 174, second sprocket; 175, first chain; 180, lifting mechanism; 181, mounting seat; 182, second driving motor; 183, third sprocket; 184, second chain; 190, funnel. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] As described in the background art, currently, the detection method for the impurity content in carbon black is mainly the traditional screening method, which requires manual operation throughout the process and has a low screening efficiency.

[0020] To solve the above problems, referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the present invention provides a device for testing the impurity content in carbon black, including a test chamber 110, a test sieve 120, a funnel 190, a receiving tray 140, a platform scale 130, and a flattening mechanism 150. The test chamber 110 provides a closed screening environment to prevent carbon black from spreading into the workshop and improve the operating environment. The test sieve 120 is installed in the test chamber 110 and is used for screening carbon black so that the impurities in the carbon black remain on the top surface of the test sieve 120. The funnel 190 is installed in the test chamber 110 and is located below the test sieve 120, playing a role of guiding and collecting. The receiving tray 140 is arranged in the test chamber 110 and is located below the funnel 190 for receiving carbon black. The platform scale 130 is arranged in the test chamber 110 and is located below the receiving tray 140. The carbon black falling onto the receiving tray 140 and the receiving tray 140 are weighed by means of the platform scale 130. The flattening mechanism 150 is rotatably installed in the test chamber 110 and is located above the test sieve 120 for flattening the carbon black on the top surface of the test sieve 120 to improve the screening efficiency. Compared with the method of manual operation throughout the process, the labor intensity is reduced, the screening and detection efficiency is guaranteed, and it is beneficial to realize automatic screening and detection.

[0021] Preferably, the sieve mesh of the test sieve 120 is made of tin bronze or stainless steel, and the mesh hole size is 850 μm, meeting the requirements.

[0022] Preferably, the funnel 190 is made of stainless steel, and the inner diameter of the upper opening is closely fitted with the outer diameter of the test sieve 120 to prevent carbon black from leaking from the fitting place. The side wall of the funnel 190 is detachably connected to the test chamber 110 by bolts.

[0023] Preferably, the receiving tray 140 is a wide-mouth tray with a capacity of 1000 m³.

[0024] Preferably, the accuracy of the platform scale 130 is ±5 g.

[0025] In some of these embodiments, the flattening mechanism 150 includes a first transmission rod 151 and a first brush 152. The axis of the first transmission rod 151 is vertically arranged and can rotate around its own axis. The first brush 152 is installed at the bottom end of the first transmission rod 151 and can rotate with the first transmission rod 151 to flatten the carbon black on the top surface of the test sieve 120 and accelerate the screening efficiency of impurities. By controlling the length of the first transmission rod 151, the height and force of the first brush 152 can be controlled. The device for testing the impurity content in carbon black further includes a first driving mechanism 160, a speed detection sensor, and a controller. The first driving mechanism 160 is installed on the top of the test chamber 110 and is connected to the top end of the first transmission rod 151 for driving the first transmission rod 151 and the first brush 152 to rotate to improve the degree of automation. The first driving mechanism 160 includes a third driving motor 161 and a first coupling 162. The third driving motor 161 is fixedly installed on the top of the test chamber 110, and the output shaft is fixedly connected to the top end of the first transmission rod 151 through the first coupling 162. The speed detection sensor is installed on the top of the test chamber 110 for detecting the rotational speed of the output shaft of the third driving motor 161. The controller is electrically connected to the platform scale 130, the speed detection sensor, and the third driving motor 161 respectively.

[0026] In this embodiment, the working process and principle of the device for testing the impurity content in carbon black are as follows: Place 500 g of carbon black on the top surface of the test sieve 120. The platform scale 130 transmits the weighed weight signal to the controller, and the controller calculates the weight of the carbon black on the receiving tray 140. The speed detection sensor transmits the detected rotational speed signal to the controller to calibrate the rotational speed of the output shaft of the third driving motor 161. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 0 and less than or equal to 300 g, it controls the output shaft of the third driving motor 161 to rotate at a first rotational speed to reduce the degree of carbon black flying in the test chamber 110. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 300 g and less than or equal to 450 g, it controls the rotational speed of the third driving motor 161 to gradually increase to a second rotational speed to improve the impurity screening efficiency. It should be noted that the second rotational speed is greater than the first rotational speed. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 450 g and remains unchanged for a certain period of time, it controls the rotational speed of the third driving motor 161 to gradually increase to a third rotational speed for detecting whether there are non-impurities remaining on the top surface of the test sieve 120. It should be noted that the third rotational speed is greater than the first rotational speed. If the weight of the carbon black on the receiving tray 140 remains constant after maintaining the third rotational speed for 1 min, it controls the third driving motor 161 to stop working.

[0027] Preferably, the material of the first brush 152 is sisal hair, boar bristle or nylon 66, and the hair length is greater than or equal to 2 cm. When the first brush 152 is made of boar bristle, the amount of carbon black attached to the first brush 152 can be effectively reduced.

[0028] The following tests were conducted using the above device for testing the impurity content in carbon black: Test 1 Place 500 g of carbon black on the top surface of the test sieve 120. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 0 and less than or equal to 300 g, control the output shaft of the third drive motor 161 to rotate at 100 r / min. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 300 g and less than or equal to 450 g, control the speed of the third drive motor 161 to gradually increase to 200 r / min. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 450 g and remains unchanged for a certain period of time, control the speed of the third drive motor 161 to gradually increase to 300 r / min. If the weight of the carbon black on the receiving tray 140 remains constant when maintaining this speed for 1 min, control the third drive motor 161 to stop working.

[0029] Test 2 Place 500 g of carbon black on the top surface of the test sieve 120. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 0 and less than or equal to 300 g, control the output shaft of the third drive motor 161 to rotate at 80 r / min. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 300 g and less than or equal to 450 g, control the speed of the third drive motor 161 to gradually increase to 200 r / min. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 450 g and remains unchanged for a certain period of time, control the speed of the third drive motor 161 to gradually increase to 300 r / min. If the weight of the carbon black on the receiving tray 140 remains constant when maintaining this speed for 1 min, control the third drive motor 161 to stop working.

[0030] Test 3 Place 500g of carbon black on the top surface of the test sieve 120. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 0 and less than or equal to 300g, the output shaft of the third drive motor 161 is controlled to rotate at 100r / min. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 300g and less than or equal to 450g, the speed of the third drive motor 161 is controlled to gradually increase to 180r / min. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 450g and remains unchanged for a certain period of time, the speed of the third drive motor 161 is controlled to gradually increase to 300r / min. If the speed is maintained for 1 minute and the weight of the carbon black on the receiving tray 140 remains constant, the third drive motor 161 is controlled to stop working.

[0031] Test 4 Place 500g of carbon black on the top surface of the test sieve 120. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 0 and less than or equal to 300g, the output shaft of the third drive motor 161 is controlled to rotate at 100r / min. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 300g and less than or equal to 450g, the speed of the third drive motor 161 is controlled to gradually increase to 200r / min. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 450g and remains unchanged for a certain period of time, the speed of the third drive motor 161 is controlled to gradually increase to 250r / min. If the speed is maintained for 1 minute and the weight of the carbon black on the receiving tray 140 remains constant, the third drive motor 161 is controlled to stop working.

[0032] The test results show that in tests 1-4, when the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 0 and less than or equal to 300g, the output shaft of the third drive motor 161 is controlled to rotate at 100r / min. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 300g and less than or equal to 450g, the speed of the third drive motor 161 is controlled to gradually increase to 200r / min. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 450g and remains unchanged for a certain period of time, the speed of the third drive motor 161 is controlled to gradually increase to 300r / min. The impurity content test can be achieved as quickly as possible, and the purpose of automatic testing can be achieved.

[0033] In some other embodiments, the flattening mechanism 150 includes a second transmission rod 153, a third transmission rod 154, a second brush 155, a bow arm 156, and a bow line 157. The second transmission rod 153 is vertically arranged, can rotate, and can move up and down. The third transmission rod 154 is vertically arranged, can rotate, and can move up and down. It should be noted that the second brush 155 is mounted on the bottom end of the second transmission rod 153, and can rotate and move up and down with the second transmission rod 153. The opening of the bow arm 156 is set downward, and the middle part is mounted on the bottom end of the third transmission rod 154, and can rotate and move up and down with the third transmission rod 154. The bow line 157 is mounted on the bottom of the bow arm 156, and can rotate and move up and down with the bow arm 156. The device for testing the impurity content in carbon black also includes a second driving mechanism 170, a lifting mechanism 180, a speed detection sensor, and a controller. The second drive mechanism 170 is mounted on the top of the test chamber 110 and can be connected or disconnected with the second and third transmission rods 153, 154. A lifting mechanism 180 is mounted on the top of the test chamber 110 and connected to the top ends of the second and third transmission rods 153, 154, respectively, to drive the second and third transmission rods 153, 154 to alternately rise and fall. The second drive mechanism 170 and the lifting mechanism 180 enhance the automation of impurity screening and detection. When the second drive mechanism 170 is disconnected from the second and third transmission rods 153, 154, the lifting mechanism 180 can drive the second and third transmission rods 153, 154 to alternately rise and fall. When the second drive mechanism 170 is connected to the second and third transmission rods 153, 154, the lifting mechanism 180 can drive the second and third transmission rods 153, 154 to rotate together. The second drive mechanism 170 includes a first drive motor 171, a first sprocket 172, a clutch 173, a second sprocket 174, and a first chain 175. The first drive motor 171 is fixedly mounted on the top of the test chamber 110. The first sprocket 172 is mounted on the output shaft of the first drive motor 171. The clutch 173 is mounted on the second transmission rod 153 and the third transmission rod 154. The second sprocket 174 is mounted on the outside of the clutch 173 and is connected to the first sprocket 172 via a first chain 175. When the clutch 173 is connected to the second transmission rod 153 and the third transmission rod 154, the first drive motor 171 drives the first sprocket 172 to rotate, which in turn drives the second sprocket 174, the clutch 173, the second transmission rod 153, and the third transmission rod 154 to rotate via the first chain 175, thereby driving the second brush 155 and the bow wire 157 to rotate. The lifting mechanism 180 includes a mounting base 181, a second drive motor 182, a third sprocket 183, and a second chain 184. The mounting base 181 is rotatably mounted on the top of the test chamber 110. The second drive motor 182 is fixedly mounted on the top of the mounting base 181 , with its axis arranged horizontally. The third sprocket 183 is sleeved on the output shaft of the second drive motor 182 .A second chain 184 is wound around the third sprocket 183, with one end fixedly connected to the top of the second transmission rod 153 and the other end fixedly connected to the top of the third transmission rod 154. When the clutch 173 is disconnected from the second and third transmission rods 153, 154, the output shaft of the second drive motor 182 can rotate clockwise or counterclockwise, causing the third sprocket 183 to rotate clockwise or counterclockwise, thereby raising the second transmission rod 153 and lowering the third transmission rod 154, or raising the third transmission rod 154 and lowering the second transmission rod 153. By controlling the rotation angle of the drive motor 182, the height of the second brush 155 and the bow wire 157 can be precisely controlled, thereby precisely controlling the force of the second brush 155. A speed sensor is mounted on the top of the test chamber 110 to detect the rotation speed of the output shaft of the first drive motor 171. A controller is electrically connected to the scale 130, the speed sensor, the first drive motor 171, the second drive motor 182, and the clutch 173.

[0034] In this embodiment, the working process and principle of the device for testing the impurity content in carbon black are as follows: Place 500 g of carbon black on the top surface of the test sieve 120. The platform scale 130 transmits the weighed weight signal to the controller, and the controller calculates the weight of the carbon black on the receiving tray 140. The speed detection sensor transmits the detected rotation speed signal to the controller to calibrate the rotation speed of the output shaft of the first driving motor 171. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 0 and less than or equal to 150 g, the controller controls the clutch 173 to disconnect from the second transmission rod 153 and the third transmission rod 154. Then, the controller controls the output shaft of the second driving motor 182 to rotate, so that the second transmission rod 153 rises and the third transmission rod 154 descends, and further the bow wire 157 descends. After that, the controller controls the clutch 173 to connect with the second transmission rod 153 and the third transmission rod 154. Then, the controller controls the output shaft of the first driving motor 171 to rotate at the first rotation speed, and uses the bow wire 157 to cut and level the carbon black on the top surface of the test sieve 120, greatly reducing the flying degree of the carbon black in the test chamber 110, and at the same time, improving the impurity screening efficiency. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 150 and less than or equal to 300 g, the controller controls the clutch 173 to disconnect from the second transmission rod 153 and the third transmission rod 154. Then, the controller controls the output shaft of the second driving motor 182 to rotate, so that the third transmission rod 154 rises and the second transmission rod 153 descends, and further the second brush 155 descends. After that, the controller controls the clutch 173 to connect with the second transmission rod 153 and the third transmission rod 154. Then, the controller controls the output shaft of the first driving motor 171 to continue to rotate at the first rotation speed, and uses the second brush 155 to level the carbon black on the top surface of the test sieve 120 for the second time. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 300 g and less than or equal to 450 g, the controller gradually increases the rotation speed of the first driving motor 171 to the second rotation speed. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 450 g and remains unchanged for a certain duration, the controller gradually increases the rotation speed of the first and third driving motors to the third rotation speed. If the third rotation speed is maintained for 1 min and the weight of the carbon black on the receiving tray 140 still remains constant, the controller controls the first driving motor 171 to stop working.

[0035] Preferably, the material of the second brush 155 is sisal hair, boar bristle or nylon 66, and the hair length is greater than or equal to 2 cm. When the second brush 155 is made of boar bristle, the amount of carbon black attached to the second brush 155 can be effectively reduced.

[0036] Conduct an experiment using the above device for testing the impurity content in carbon black: Experiment 5 Place 500 g of carbon black on the top surface of the test sieve 120. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 0 and less than or equal to 150 g, the controller controls the output shaft of the first drive motor 171 to rotate at 100 r / min, and first uses the bow wire 157 to level the carbon black on the test sieve 120. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 150 and less than or equal to 300 g, the controller controls the output shaft of the first drive motor 171 to rotate at 100 r / min, and then uses the second brush 155 to level the carbon black on the test sieve 120. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 300 g and less than or equal to 450 g, the controller controls the rotational speed of the first drive motor 171 to gradually increase to 200 r / min. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 450 g and remains unchanged for a certain duration, the controller controls the rotational speed of the first drive motor 171 to gradually increase to 300 r / min. If the weight of the carbon black on the receiving tray 140 remains constant after maintaining this rotational speed for 1 min, then control the first drive motor 171 to stop working.

[0037] Test 6 Place 500 g of carbon black on the top surface of the test sieve 120. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 0 and less than or equal to 150 g, the controller controls the output shaft of the first drive motor 171 to rotate at 80 r / min, and first uses the bow wire 157 to level the carbon black on the test sieve 120. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 150 and less than or equal to 300 g, the controller controls the output shaft of the first drive motor 171 to rotate at 80 r / min, and then uses the second brush 155 to level the carbon black on the test sieve 120. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 300 g and less than or equal to 450 g, the controller controls the rotational speed of the first drive motor 171 to gradually increase to 200 r / min. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 450 g and remains unchanged for a certain duration, the controller controls the rotational speed of the first drive motor 171 to gradually increase to 300 r / min. If the weight of the carbon black on the receiving tray 140 remains constant after maintaining this rotational speed for 1 min, then control the first drive motor 171 to stop working.

[0038] Test 7 500g of carbon black is placed on the top surface of the test sieve 120. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 0 but less than or equal to 150g, the controller controls the output shaft of the first drive motor 171 to rotate at 100r / min, and first uses the bow wire 157 to spread the carbon black on the test sieve 120. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 150 but less than or equal to 300g, the controller controls the output shaft of the first drive motor 171 to rotate at 100r / min, and then uses the second brush 155 to spread the carbon black on the test sieve 120. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 300g but less than or equal to 450g, the controller controls the speed of the first drive motor 171 to gradually increase to 180r / min. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 450g and remains constant for a certain period of time, the controller gradually increases the speed of the first drive motor 171 to 300r / min. If this speed is maintained for 1 minute and the weight of the carbon black on the receiving tray 140 remains constant, the first drive motor 171 is controlled to stop.

[0039] Test 8 500g of carbon black is placed on the top surface of the test sieve 120. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 0 but less than or equal to 150g, the controller controls the output shaft of the first drive motor 171 to rotate at 100r / min, and first uses the bow wire 157 to spread the carbon black on the test sieve 120. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 150 but less than or equal to 300g, the controller controls the output shaft of the first drive motor 171 to rotate at 100r / min, and then uses the second brush 155 to spread the carbon black on the test sieve 120. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 300g but less than or equal to 450g, the controller controls the speed of the first drive motor 171 to gradually increase to 200r / min. When the controller calculates that the weight of the carbon black on the receiving tray 140 is greater than 450g and remains constant for a certain period of time, the controller gradually increases the speed of the first drive motor 171 to 250r / min. If this speed is maintained for 1 minute and the weight of the carbon black on the receiving tray 140 remains constant, the first drive motor 171 is controlled to stop.

[0040] The test results show that in tests 5-8, first using the bow wire 157 to cut and flatten the carbon black, and then using the second brush 155 to flatten the carbon black, can significantly reduce the degree of carbon black flying in the test chamber 110, and the impurity screening efficiency is higher, which can achieve the purpose of automatic testing.

[0041] Preferably, the clutch 173 can be rotatably installed in the test chamber 110 through a bracket to prevent the clutch 173 from moving in the vertical direction.

[0042] Preferably, a sealing cover 111 is provided at the top of the test chamber 110 to prevent the escape of carbon black.

[0043] Preferably, the bow arm 156 is made of a rigid material and does not deform. The bow string 157 is a nylon rope. An adjusting bolt 158 is installed at one end of the bow arm 156. One end of the bow string 157 is fixedly connected to one end of the bow arm 156, and the other end is fixedly connected to the adjusting bolt 158. By turning the adjusting bolt 158, the tension of the bow string 157 can be adjusted, thereby adjusting the cutting effect.

[0044] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0045] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0046] In the present invention, unless otherwise clearly defined and limited, the terms "install", "connect", "connection", "fix" and other terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection or communication with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the present invention, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0048] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A device for testing the impurity content in carbon black, characterized in that, Comprising: Test chamber; Test sieve, installed inside the test chamber; Funnel, installed inside the test chamber and located below the test sieve; Receiving tray, arranged inside the test chamber and located below the funnel; Platform scale, arranged inside the test chamber and located below the receiving tray; Levelling mechanism, rotatably installed inside the test chamber and located above the test sieve.

2. The device for testing the impurity content in carbon black according to claim 1, characterized in that The levelling mechanism includes: First transmission rod, with its axis vertically arranged and capable of rotating around its own axis; First brush, installed at the bottom end of the first transmission rod and capable of rotating with the first transmission rod.

3. The device for testing the impurity content in carbon black according to claim 2, wherein, Also included: First driving mechanism, installed at the top of the test chamber, connected to the top end of the first transmission rod, and used to drive the first transmission rod to rotate.

4. The device for testing the impurity content in carbon black according to claim 1, characterized in that, The levelling mechanism includes: Second transmission rod, vertically arranged, capable of rotating and capable of moving up and down; Third transmission rod, vertically arranged, capable of rotating and capable of moving up and down; Second brush, installed at the bottom end of the second transmission rod and capable of rotating and moving up and down with the second transmission rod; Bow arm, with its opening facing downwards, installed in the middle at the bottom end of the third transmission rod and capable of rotating and moving up and down with the third transmission rod; Bow wire, installed at the bottom of the bow arm.

5. The device for testing the impurity content in carbon black according to claim 4, wherein, Also included: Second driving mechanism, installed at the top of the test chamber, capable of connecting or disconnecting from the second transmission rod and the third transmission rod, and used to drive the second transmission rod and the third transmission rod to rotate; Lifting mechanism, installed at the top of the test chamber, respectively connected to the top ends of the second transmission rod and the third transmission rod, and capable of driving the second transmission rod and the third transmission rod to alternately lift and lower.

6. The device for testing the impurity content in carbon black according to claim 5, characterized in that, The second driving mechanism includes: First driving motor, installed at the top of the test chamber; First sprocket, sleeved on the output shaft of the first driving motor; Clutch, sleeved on the second transmission rod and the third transmission rod; Second sprocket, sleeved outside the clutch and connected to the first sprocket through a first chain.

7. The device for testing the impurity content in carbon black according to claim 5, wherein, The lifting mechanism includes: Mounting seat, rotatably installed at the top of the test chamber; Second driving motor, fixedly installed at the top end of the mounting seat; Third sprocket, sleeved on the output shaft of the second driving motor; Second chain, wound around the third sprocket, with one end fixedly connected to the top end of the second transmission rod and the other end fixedly connected to the top end of the third transmission rod.

8. The device for testing the impurity content in carbon black according to any one of claims 1 to 7, characterized in that, The aperture of the test sieve is 850μm.

9. The device for testing the impurity content in carbon black according to any one of claims 1 to 7, characterized in that Also included: Controller, connected to the platform scale.

10. The device for testing the impurity content in carbon black according to any one of claims 1 to 7, characterized in that, A sealing cover is provided at the top of the test chamber.

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