Chemical raw material quantification method and quantification supply device

Abstract

This invention belongs to the field of quantitative feeding technology, specifically a method and device for quantitatively feeding chemical raw materials, including a screw quantitative feeder and a quantitative feeding mechanism. The quantitative feeding mechanism includes a support frame; a U-shaped cylinder is provided in the inner ring of the support frame; multiple turntables are stacked inside the U-shaped cylinder; two first electric push rods are installed at the bottom of the U-shaped cylinder, and mounting plates are fixed on the extension rods of the two first electric push rods; a first motor is installed on the mounting plate; a vertical rod is installed on the first motor; a first rectangular rod is fixed on the vertical rod; a U-shaped frame is installed below the U-shaped cylinder; a second motor is installed at the bottom of the U-shaped frame; a threaded rod is installed on the second motor; a screw cylinder is screw-driven on the threaded rod; a sealing plate is installed on the top of the screw cylinder. By setting up a quantitative feeding mechanism, this invention can reduce the adhesion of electrostatic adsorption to the pipe wall and effectively suppress the problem of light powder being scattered due to airflow disturbance.

Description

Technical Field

[0001] This invention belongs to the field of quantitative feeding technology, specifically a quantitative method and quantitative feeding device for chemical raw materials. Background Technology

[0002] In the field of chemical production, the accuracy of raw material proportioning directly determines the performance stability of the final product, the safety of the production process, and the economic efficiency of resource utilization. Therefore, quantitative feeding technology has become one of the core technologies in the chemical production process. Chemical production involves a wide variety of powdered and granular raw materials, with significant differences in particle size distribution, bulk density, viscosity, and electrostatic properties. If precise quantitative feeding cannot be achieved, it will not only cause the proportions of each component in the reaction system to deviate from the preset process values, leading to incomplete reactions and substandard product purity, but it may also cause reaction runaway due to excessive raw materials, or reduce production capacity due to insufficient raw materials, resulting in both raw material waste and increased production costs.

[0003] The screw feeder mainly consists of a feeding hopper, a screw conveying unit, a weighing detection system, a drive motor, and a control system. Its working principle is divided into two types: volumetric and weighing. The volumetric type determines the theoretical conveying volume per unit time by preset the screw pitch and rotation speed of the screw blades, and then converts it into mass by combining the material bulk density. The weighing type integrates the feeding hopper and the screw conveying section onto a weighing sensor, obtains the actual output by monitoring the material's weight loss rate in real time, and uses a closed-loop control system to adjust the motor speed to achieve accurate metering.

[0004] However, in practical applications, when materials fall from the discharge pipe into the reactor, lightweight powders and ultrafine granular chemical raw materials are prone to floating. Some particles are unable to fall smoothly due to airflow disturbances and instead diffuse towards the pipe wall, adhering to the pipe wall surface due to electrostatic adsorption. As a result, the actual amount of material entering the reactor is less than the theoretical discharge amount detected by the weighing system. Furthermore, as production time progresses, the material adhering to the pipe wall gradually accumulates, further amplifying the measurement deviation. Even if the weighing screw feeder has a weight loss rate feedback adjustment function, it is difficult to fully compensate for the material loss caused by material floating and adhesion to the wall. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies and solve the aforementioned technical problems, this invention proposes a quantitative method and a quantitative feeding device for chemical raw materials. By setting up a quantitative feeding mechanism, this invention can reduce adhesion to the pipe wall caused by electrostatic adsorption and effectively suppress the problem of light powders being dispersed due to airflow disturbance. The specific structure is as follows:

[0006] A chemical raw material quantitative supply device includes a screw quantitative feeder, which is used to quantitatively feed chemical raw materials; it also includes a quantitative feeding mechanism.

[0007] The quantitative feeding mechanism includes a support frame; the inner ring of the support frame is provided with a U-shaped cylinder; multiple turntables are stacked inside the U-shaped cylinder, and adjacent turntables are in close contact with each other;

[0008] Each of the turntables has two material troughs, each with the same capacity; the top of the U-shaped cylinder is provided with a top plate, and the top plate is in contact with the uppermost turntable;

[0009] Multiple L-shaped plates are installed on the top plate, and the other side of the L-shaped plates is installed on the support frame; the screw metering feeder is installed on the top plate, and the discharge port of the screw metering feeder is vertically downward and corresponds to one side of the material trough on the uppermost turntable;

[0010] The bottom of the U-shaped cylinder has two through holes, which correspond to the material troughs on the turntable; the middle of the turntable has a rectangular groove, the top of which penetrates the top plate and the bottom of which penetrates the U-shaped cylinder.

[0011] Two first electric actuators are installed at the bottom of the U-shaped cylinder, and mounting plates are fixed on the extension rods of the two first electric actuators; a first motor is installed on the mounting plate; a vertical rod is installed on the first motor; a first rectangular rod is fixed on the vertical rod, and the first rectangular rod slides in the rectangular grooves of multiple turntables.

[0012] A U-shaped frame is installed below the U-shaped cylinder; a second motor is installed at the bottom of the U-shaped frame; a threaded rod is installed on the second motor; a screw cylinder is screw-driven on the threaded rod; guide rods are provided on both sides of the screw cylinder, and the guide rods extend downward and slide inside the U-shaped frame; a sealing plate is installed on the top of the screw cylinder, and the sealing plate extends through one of the through holes into one of the material troughs of the turntable;

[0013] Another through hole is located below a reaction vessel, and the inlet of the reaction vessel is opposite to the through hole.

[0014] In a preferred embodiment of the present invention, a second rectangular rod is rotatably mounted below the first rectangular rod on the upright;

[0015] In its initial state, the top of the second rectangular rod is located within the rectangular groove at the bottom of the U-shaped cylinder, thereby limiting the position of the second rectangular rod.

[0016] In a preferred embodiment of the present invention, a limit ring is fixed to the outer ring surface of each turntable;

[0017] The inner surface of the U-shaped cylinder has evenly arranged annular grooves, and the limiting ring slides within the annular grooves.

[0018] In a preferred embodiment of the present invention, the outer ring of the U-shaped cylinder is fixed with evenly arranged support blocks;

[0019] Each support block is equipped with a weighing sensor, which is mounted on the support frame and is used to weigh the U-shaped cylinder and its internal and bottom structures as a whole.

[0020] In a preferred embodiment of the present invention, a third rectangular rod slides inside the threaded rod;

[0021] The top of the third rectangular rod is fixed to the bottom of the sealing plate; the screw cylinder rotates at the bottom of the sealing plate.

[0022] In a preferred embodiment of the present invention, a ring is fixed to the outer ring of the screw barrel;

[0023] The ring has evenly arranged T-shaped rods that slide inside it, and the top of the T-shaped rods is spherical; a spring connects the T-shaped rods to the ring.

[0024] The bottom of the sealing plate is fixed with evenly arranged arc-shaped blocks, and the arc-shaped blocks intersect with the T-shaped rod.

[0025] In a preferred embodiment of the present invention, a second electric actuator is mounted on the top plate;

[0026] A push plate is installed on the extension rod of the second electric push rod; a circular groove is opened on the top plate, and the push plate is initially located in the circular groove; the circular groove is opposite to the feed trough of the turntable away from the screw metering feeder.

[0027] In a preferred embodiment of the present invention, a rotating roller is provided inside the chemical reaction vessel, and the rotating roller is driven by a third motor; a scraper is provided on the rotating roller.

[0028] In a preferred embodiment of the present invention, the scraper includes a fixed plate and a sliding plate;

[0029] A sliding plate is slidable within the fixed plate, and the sliding plate slides within the fixed plate via a spring.

[0030] The present invention also provides a method for quantitatively feeding chemical raw materials, which is applicable to the above-mentioned quantitative supply device and includes the following steps:

[0031] Step 1: Process chemical raw materials, remove impurities and lumps, control moisture content ≤%; clean the cavity and discharge pipe of the screw feeder, and calibrate its weighing sensor;

[0032] Step 2: Input the process preset feeding amount and feeding rate into the screw feeder control system; for volumetric constant speed and gravimetric constant weight loss rate;

[0033] Step 3: Start the screw feeder. The equipment automatically adjusts the screw speed according to the rate of weight loss and feeds the material. Simultaneously monitor the weighing data of the supporting structure and compare it with the metering value of the screw feeder in real time. If the deviation exceeds the threshold, the screw feeder will be finely adjusted to supplement the feed.

[0034] Step 4: After the material feeding reaches the standard, clean the material adhering to the inner wall of the equipment, record the metering data of the screw feeder, and periodically recalibrate its weighing sensor to prepare for the next batch of metering.

[0035] The beneficial effects of this invention are as follows:

[0036] 1. The present invention discloses a method and device for quantitatively feeding chemical raw materials. Through a dynamic downward design where the sealing plate moves in proportion to the feeding speed, an adaptive dynamic closed space is formed in the feed trough. This precisely controls the falling height of the raw materials and the remaining space in the feed trough, eliminating the risk of light powder flying and spreading due to excessive falling height and excessive space redundancy, reducing adhesion to the pipe wall caused by electrostatic adsorption, and significantly reducing material loss during feeding and transfer. At the same time, the downward speed of the sealing plate is precisely matched with the feeding speed, always keeping the powder in the feed trough in a slightly full state, with no excess gaps for powder diffusion, effectively suppressing the problem of light powder drifting due to airflow disturbance.

[0037] 2. The chemical raw material quantitative method and quantitative supply device of the present invention achieves layered drive through the linkage of the first electric push rod and the first rectangular rod, which drives only the turntable containing raw materials to rotate, while the turntable without material remains stationary, reducing the shaking of raw materials caused by the overall rotation and avoiding secondary flying of light powder in the material trough during the transfer process; after the turntable rotates to the position, the material trough is accurately aligned and the material is dropped, without any open transition link, thus preventing powder diffusion and wall adsorption during the transfer and dropping stages.

[0038] 3. The chemical raw material quantitative method and quantitative supply device of the present invention, the rotation of the sealing plate ensures that the raw material falling from the outlet of the screw feeder falls evenly on the upper surface of the sealing plate, avoiding the raw material from accumulating in the center or edge of the material trough due to gravity, forming an uneven state with local highs and empty surroundings; this uniform material distribution effect eliminates local airflow disturbance caused by the difference in the height of the raw material accumulation, reducing the probability of powder flying and spreading from a high place; at the same time, when the sealing plate vibrates, it can effectively break the bridging structure formed by the attraction between the raw material powder particles, allowing the powder particles to be interlocked and compacted, avoiding voids and other loose filling phenomena in the material trough. Attached Figure Description

[0039] The invention will now be further described with reference to the accompanying drawings.

[0040] Figure 1 This is a structural diagram of the screw metering feeder and metering feeding mechanism as a whole in this invention;

[0041] Figure 2 This is an internal structural diagram of the quantitative feeding mechanism in this invention;

[0042] Figure 3 This is a diagram showing the separation structure of the quantitative feeding mechanism in this invention;

[0043] Figure 4 This is the present invention. Figure 3 Enlarged view of a portion of point A in the middle;

[0044] Figure 5 This is a structural diagram of the sealing disc and screw barrel of the present invention;

[0045] Figure 6 This is a top view of the screw metering feeder and metering feeding mechanism as a whole in this invention;

[0046] Figure 7 This is the present invention. Figure 6 Cross-sectional view of the transport unit at point BB;

[0047] Figure 8 This is the present invention. Figure 7 Enlarged view of a section at point C;

[0048] Figure 9 This is the present invention. Figure 7 Enlarged view of a section at point D;

[0049] Figure 10 This is the present invention. Figure 7 Enlarged view of a section at point E in the middle;

[0050] Figure 11 This is the present invention. Figure 7 Enlarged view of a section at point F.

[0051] In the diagram: 1. Screw metering feeder; 2. Support frame; 21. U-shaped cylinder; 22. Turntable; 23. Feed trough; 24. Through hole; 25. Rectangular groove; 26. Limiting ring; 27. Annular groove; 28. Support block; 29. ​​Weighing sensor; 3. Top plate; 31. Mounting plate; 32. Second electric actuator; 33. Push plate; 4. First electric actuator; 41. Mounting plate; 42. Vertical pole; 43. First rectangular rod; 44. Second rectangular rod; 5. U-shaped frame; 51. Threaded rod; 52. Screw cylinder; 53. Guide rod; 54. Sealing plate; 55. Third rectangular rod; 56. Ring; 57. T-shaped rod; 58. Arc block; 6. Reactor; 61. Feed inlet; 62. Rotary roller; 63. Fixing plate; 64. Slide plate. Detailed Implementation

[0052] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0053] like Figures 1 to 11As shown, in one aspect, the present invention discloses a chemical raw material quantitative supply device, including a screw quantitative feeder 1, which is used for quantitatively dispensing chemical raw materials; it also includes a quantitative feeding mechanism;

[0054] The quantitative feeding mechanism includes a support frame 2; the inner ring of the support frame 2 is provided with a U-shaped cylinder 21; multiple turntables 22 are stacked inside the U-shaped cylinder 21, and adjacent turntables 22 are in close contact with each other;

[0055] Each of the turntables 22 has two material troughs 23, each with the same capacity; the top of the U-shaped cylinder 21 is provided with a top plate 3, and the top plate 3 is in contact with the uppermost turntable 22;

[0056] Multiple L-shaped plates 31 are installed on the top plate 3, and the other side of the L-shaped plates 31 is installed on the support frame 2; the screw metering feeder 1 is installed on the top plate 3, and the discharge port of the screw metering feeder 1 is vertically downward and corresponds to one side of the material trough 23 on the uppermost turntable 22.

[0057] The bottom of the U-shaped cylinder 21 has two through holes 24, and the through holes 24 correspond to the material trough 23 on the turntable 22; the middle of the turntable 22 has a rectangular groove 25, and the top of the rectangular groove 25 penetrates the top plate 3 and the bottom penetrates the U-shaped cylinder 21.

[0058] Two first electric actuators 4 are installed at the bottom of the U-shaped cylinder 21, and mounting plates 41 are fixed on the extension rods of the two first electric actuators 4; a first motor is installed on the mounting plate 41; a vertical rod 42 is installed on the first motor; a first rectangular rod 43 is fixed on the vertical rod 42, and the first rectangular rod 43 slides in the rectangular grooves 25 of the multiple turntables 22.

[0059] A U-shaped frame 5 is installed below the U-shaped cylinder 21; a second motor is installed at the bottom of the U-shaped frame 5; a threaded rod 51 is installed on the second motor; a screw cylinder 52 is screwed onto the threaded rod 51; guide rods 53 are provided on both sides of the screw cylinder 52, and the guide rods 53 extend downward and slide inside the U-shaped frame 5; a sealing plate 54 is installed on the top of the screw cylinder 52, and the sealing plate 54 extends through one of the through holes 24 into one of the material troughs 23 of the turntable 22;

[0060] Another through hole 24 is provided below a reaction vessel 6, and the feed inlet 61 of the reaction vessel 6 is opposite to the through hole 24.

[0061] During quantitative feeding, the raw materials are first placed into the hopper of the screw feeder 1. Then, the amount of raw materials to be fed is input according to the process requirements. The screw feeder 1 is then started, which will push the material to move and use sensors to collect the overall mass change in real time. The material will then enter the troughs 23 of multiple turntables 22 through the discharge port. When the material is discharged from the discharge port, the system calculates the actual discharge amount through the rate of weight loss and automatically adjusts the screw speed. When the amount of material fed is the same as the set amount of material fed, the screw feeder 1 is controlled to stop feeding.

[0062] Specifically, before feeding, the second motor drives the threaded rod 51 to rotate. The rotating threaded rod 51 pushes the screw barrel 52 upward. The upward-moving screw barrel 52 drives the sealing plate 54 to move upward along one of the material troughs 23 of the multiple turntables 22. When the sealing plate moves to the top and aligns with the discharge port on the screw metering feeder 1, the second motor stops rotating. Then, the screw metering feeder 1 is operated and feeding is performed. The raw material enters the material troughs 23 of the multiple turntables 22 from the discharge port. At the same time, the second motor drives the threaded rod 51 to rotate in the opposite direction, thereby driving the sealing plate 54 to gradually move downward through the screw barrel 52. The downward speed of the sealing plate 54 is proportional to the speed at which the raw material enters the barrel. That is, the sealing plate 54 moves downward when the raw material enters the material trough 23. During this process, the distance between the raw material and the sealing plate 54 can be reduced, thereby reducing the space for powder diffusion and preventing the powder from spreading randomly.

[0063] More specifically, when controlling the downward movement of the sealing plate 54, the downward movement distance of the sealing plate is first set according to the feeding amount. If the feeding amount is less than or equal to the capacity of the two material troughs 23, the sealing plate 54 is gradually moved downward into the material trough 23 of the third turntable 22 from top to bottom by the second motor, and the top of the sealing plate 54 is flush with the top of the third turntable 22. The remaining feeding amounts are set in the same way. When the screw feeder 1 introduces the preset raw material into the material trough 23, the control... The screw feeder 1 stops feeding material; then the first electric push rod 4 is controlled to move upward. The upward movement of the first electric push rod 4 will push the mounting plate 41 upward. The mounting plate 41 will drive the first motor, the upright rod 42, and the first rectangular rod 43 to move upward. The upward movement of the first rectangular rod 43 will gradually extend out of the rectangular groove 25 on the top plate 3, and the first rectangular rod 43 will gradually be offset from the turntable 22 below. When the first rectangular rod 43 moves to the position of the turntable 22 containing raw materials, at this time the lower part of the first rectangular rod 43 is not aligned with the turntable 22 below. The turntable 22 without raw material contacts the material; that is, if only the material troughs 23 of the two upper turntables 22 contain raw material, the first rectangular rod 43 only contacts the two upper turntables 22, and part of the first rectangular rod 43 extends above the top plate 3; then the first motor is controlled to rotate, and the rotating first motor will drive the upright 42 and the first rectangular rod 43 to rotate, thereby driving the two upper turntables 22 to rotate through the first rectangular rod 43. When the turntable 22 drives the material trough 23 containing raw material to rotate 180 degrees, the rotating material trough 23 will scrape the top of the sealing plate 54, taking away the raw material on the top of the sealing plate 54. When the turntable 22 rotates 180 degrees, the material trough 23 containing raw material will overlap with the material trough 23 located above the reactor 6, and the material trough 23 originally located above the reactor 6 will rotate to below the discharge port of the screw metering feeder 1; then the raw material will fall from the overlapped material trough 23 and fall into the reactor 6; then the next feeding cycle will begin.

[0064] Furthermore, through the dynamic downward movement design of the sealing plate 54, which is proportional to the feeding speed, an adaptive dynamic closed space is formed in the material trough 23. This precisely controls the falling height of the raw materials and the remaining space in the material trough 23, eliminating the risk of light powder flying and spreading due to excessive falling height and excessive space redundancy, reducing the adhesion to the pipe wall caused by electrostatic adsorption, and significantly reducing material loss during feeding and transfer. At the same time, the downward movement speed of the sealing plate 54 is precisely matched with the feeding speed, always keeping the powder in the material trough 23 in a slightly full state, with no excess gaps for powder diffusion, effectively suppressing the problem of light powder drifting due to airflow disturbance.

[0065] Simultaneously, the linkage between the first electric push rod 4 and the first rectangular rod 43 achieves layered drive, which only drives the turntable 22 containing raw materials to rotate, while the unloaded turntable 22 remains stationary, reducing the shaking of raw materials caused by the overall rotation and preventing the light powder in the loaded trough 23 from flying again during the transfer process; after the turntable 22 rotates to the position, the trough 23 accurately overlaps and the material is dropped, without any open transition link, thus preventing powder diffusion and wall adsorption during the transfer and dropping stages.

[0066] As an embodiment of the present invention; a second rectangular rod 44 is rotatably located below the first rectangular rod 43 and on the upright rod 42;

[0067] In its initial state, the top of the second rectangular rod 44 is located in the rectangular groove 25 at the bottom of the U-shaped tube 21, thereby limiting the position of the second rectangular rod 44;

[0068] In this embodiment, a limit ring 26 is fixed on the outer ring surface of each turntable 22;

[0069] The inner surface of the U-shaped cylinder 21 is provided with evenly arranged annular grooves 27, and the limiting ring 26 slides within the annular grooves 27.

[0070] When the upright 42 moves the first rectangular rod 43 upward, it also moves the second rectangular rod 44 upward. Since the second rectangular rod 44 is rotatably connected to the upright 42 and is limited by the rectangular groove 25 at the bottom of the U-shaped cylinder 21, the second rectangular rod 44 can be limited. When the first motor drives the upright 42 to rotate, the upright 42 will rotate inside the second rectangular rod 44 and drive the turntable 22 containing raw materials to rotate through the first rectangular rod 43. The second rectangular rod 44 can limit and fix the turntable 22 without raw materials, thereby preventing the turntable 22 without raw materials from rotating.

[0071] Specifically, since each turntable 22 has a fixed limiting ring 26 on its outer ring, and the limiting ring 26 slides in the annular groove 27 opened in the U-shaped cylinder 21, the limiting ring 26 can rotate in the annular groove 27 during the rotation of the turntable 22, thereby limiting the rotation of the turntable 22 and preventing the turntable 22 from sliding up and down during the rotation.

[0072] As one embodiment of the present invention, the outer ring of the U-shaped cylinder 21 is fixed with evenly arranged support blocks 28;

[0073] Each of the support blocks 28 is provided with a weighing sensor 29, which is mounted on the support frame 2 and is used to weigh the U-shaped cylinder 21 and its internal and bottom structures as a whole.

[0074] Since a weighing sensor 29 is provided below the support block 28, the U-shaped cylinder 21 and the entire structure inside and at the bottom of the U-shaped cylinder 21 can be weighed. When the raw material enters the material trough 23 through the discharge port, the weighing value of the weighing sensor 29 will change. This change is the actual mass of the raw material entering the material trough 23.

[0075] Specifically, the screw feeder 1 calculates the theoretical feed rate based on its own weight loss rate, but it cannot completely avoid the deviation between the actual feed rate and the theoretical value caused by raw material floating and slight adhesion to the wall. On the other hand, the overall weighing sensor 29 of the U-shaped cylinder 21 directly monitors the actual raw material mass received in the feed trough 23, and is not affected by raw material floating or slight adhesion to the pipe wall. It can accurately reflect the actual feed increment. When the difference between the two values ​​exceeds the preset threshold: if the actual weight gain is less than the theoretical feed value, it indicates that there is a small amount of raw material floating or adhesion loss. The system automatically fine-tunes the screw feeder speed to make up the corresponding difference, and at the same time optimizes the downward movement speed of the sealing plate 54 to enhance the anti-diffusion effect.

[0076] As one embodiment of the present invention; a third rectangular rod 55 slides inside the threaded rod 51;

[0077] The top of the third rectangular rod 55 is fixed to the bottom of the sealing plate 54; the screw cylinder 52 rotates at the bottom of the sealing plate 54.

[0078] In this embodiment, a ring 56 is fixed to the outer ring of the screw barrel 52;

[0079] The ring 56 has T-shaped rods 57 that are evenly arranged inside it, and the top of the T-shaped rods 57 is spherical; a spring connects the T-shaped rods 57 and the ring 56.

[0080] The bottom of the sealing plate 54 is fixed with evenly arranged arc-shaped blocks 58, and the arc-shaped blocks 58 intersect with the T-shaped rod 57;

[0081] Since the third rectangular rod 55, which slides inside the threaded rod 51, is fixed to the bottom of the sealing plate 54, when the second motor drives the threaded rod 51 to rotate and moves the screw barrel 52 and the sealing plate 54 downward, the threaded rod 51 will also drive the third rectangular rod 55 to rotate. The rotating third rectangular rod 55 will drive the sealing plate 54 to rotate along the screw barrel 52, and the third rectangular rod 55 will gradually slide downward inside the threaded rod 51. During the rotation of the sealing plate 54, the raw material can fall relatively evenly on the sealing plate 54, avoiding uneven height of the raw material at different positions on the sealing plate 54.

[0082] Specifically, during the rotation of the sealing plate 54, multiple arc-shaped blocks 58 will rotate. When the arc-shaped blocks 58 pass the T-shaped rod 57, they will push the T-shaped rod 57 down in the ring 56 and stretch the spring between the T-shaped rod 57 and the ring 56. When the arc-shaped blocks 58 pass over the T-shaped rod 57, under the action of the spring, the T-shaped rod 57 will press against the sealing plate 54, causing the sealing plate 54 to vibrate. After the sealing plate 54 vibrates, the material above the sealing plate 54 will gradually fill, avoiding the situation of material bridging.

[0083] More specifically, the rotation of the sealing plate 54 ensures that the raw material falling from the screw feeder outlet is evenly distributed on the upper surface of the sealing plate 54, preventing the raw material from accumulating in the center or edge of the trough 23 due to gravity, thus avoiding an uneven state with localized high points and empty surrounding areas. This uniform material distribution eliminates localized airflow disturbances caused by differences in the height of the raw material accumulation, reducing the probability of powder flying and spreading from a height. At the same time, when the sealing plate 54 vibrates, it can effectively break the bridging structure formed by the attraction between the raw material powder particles, allowing the powder particles to interlock tightly and preventing voids or other loose filling phenomena in the trough 23.

[0084] As an embodiment of the present invention; a second electric actuator 32 is installed on the top plate 3;

[0085] A pusher plate 33 is installed on the extension rod of the second electric pusher 32; a circular groove is opened on the top plate 3, and the pusher plate 33 is initially located in the circular groove; the circular groove is opposite to the feed trough 23 of the turntable 22 away from the screw metering feeder 1;

[0086] In this embodiment, a rotating roller 62 is installed inside the chemical reaction vessel 6, and the rotating roller 62 is driven by a third motor;

[0087] The rotating roller 62 is equipped with a scraper;

[0088] In this embodiment, the scraper includes a fixed plate 63 and a sliding plate 64;

[0089] A sliding plate 64 slides within the fixed plate 63, and the sliding plate 64 slides within the fixed plate 63 via a spring;

[0090] When the material tank 23 containing raw materials rotates to the top of the reactor 6 and aligns with the material tank 23 without raw materials, the raw materials will fall downwards and into the reactor 6. Then, the second electric push rod 32 and the third motor are controlled to work. When the second electric push rod 32 works, it will drive the push plate 33 to move downwards. The moving push plate 33 will move downwards along the material tank 23 and push the remaining raw materials in the material tank 23 downwards. The moving push plate 33 will gradually extend into the feed port 61 of the reactor 6, thereby pushing all the remaining raw materials in the material tank 23 into the reactor 6.

[0091] Specifically, when the third motor rotates, it drives the scraper to rotate, which stirs the material in the reactor 6. At the same time, when the pusher plate 33 moves down to its limit position, it is located at the bottom of the feed inlet 61. When the scraper rotates, the sliding plate 64 first contacts the side of the pusher plate 33, and then moves along the pusher plate 33. At the same time, the sliding plate 64 gradually slides into the fixed plate 63 and compresses the spring in the fixed plate 63, so that the sliding plate 64 contacts the entire lower surface of the pusher plate 33 and scrapes off the raw material remaining on the lower surface of the pusher plate 33. After the sliding plate 64 passes the pusher plate 33, it will return to its initial state under the action of the spring. This can prevent raw material from adhering to the bottom of the material tank 23 and the pusher plate 33, thereby reducing the amount of raw material entering the reactor 6.

[0092] By controlling the second electric actuator 32 to drive the pusher plate 33 to move down along the material trough 23, the residual raw materials attached to the inner wall and bottom of the material trough 23 can be directly forced into the reactor 6, avoiding the accumulation of residual raw materials in the material trough 23 after traditional material discharge; at the same time, when the scraper rotates, the slide plate 64 first slides against the side of the pusher plate 33, and then the spring compresses the adaptive lower surface of the pusher plate 33 to tightly scrape off the powder raw materials attached to the bottom of the pusher plate 33, preventing the pusher plate 33 from carrying residual raw materials away from the reactor 6 when it rises, and avoiding the deviation in the amount of material entering the reactor caused by the residue of the pusher plate 33; at the same time, the rotating scraper can also stir the material in the reactor 6, so that the raw materials scraped off by the scraper can be mixed with the raw materials in the reactor 6.

[0093] On the other hand, the present invention also provides a method for quantitatively feeding chemical raw materials, which is applicable to the above-mentioned quantitative supply device and includes the following steps:

[0094] Step 1: Process chemical raw materials, remove impurities and lumps, and control the moisture content to ≤5%; clean the cavity 1 and discharge pipe of the screw feeder, and calibrate its weighing sensor;

[0095] Step 2: Input the process preset feeding amount and feeding rate into the control system of the screw feeder 1; volumetric constant speed, weighing constant weight loss rate;

[0096] Step 3: Start the screw feeder 1. The equipment automatically adjusts the screw speed according to the rate of weight loss and feeds the material. Simultaneously monitor the weighing data of the supporting structure and compare it with the metering value of the screw feeder 1 in real time. If the deviation exceeds the threshold, the screw feeder 1 will make fine adjustments and supplement the feed.

[0097] Step 4: After the material feeding reaches the standard, clean the material adhering to the inner wall of the equipment, record the metering data of the screw feeder 1, and periodically recalibrate its weighing sensor 29 to prepare for the next batch of metering.

[0098] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are for the convenience of describing the present invention and simplifying the description only, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and should not be construed as indicating or implying relative importance.

[0099] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A chemical raw material dosing device comprising a screw feeder (1); characterized in that, It also includes a quantitative feeding mechanism; the quantitative feeding mechanism includes a support frame (2); the support frame (2) has a U-shaped cylinder (21) in its inner ring; multiple turntables (22) are stacked inside the U-shaped cylinder (21); each turntable (22) has two material troughs (23); the top of the U-shaped cylinder (21) has a top plate (3); multiple L-shaped plates (31) are installed on the top plate (3), and the other side of the L-shaped plates (31) is installed on the support frame (2); the screw quantitative feeder (1) is installed on the top plate (3); the bottom of the U-shaped cylinder (21) has two through holes (24); the middle of the turntable (22) has a rectangular groove (25), and the top of the rectangular groove (25) penetrates the top plate (3), and the bottom penetrates the U-shaped cylinder (21); the bottom of the U-shaped cylinder (21) is equipped with two first electric push rods (4), and the extension of the two first electric push rods (4) is... A mounting plate (41) is fixed on the rod; a first motor is mounted on the mounting plate (41); a vertical rod (42) is mounted on the first motor; a first rectangular rod (43) is fixed on the vertical rod (42), and the first rectangular rod (43) slides in the rectangular groove (25) of multiple turntables (22); a U-shaped frame (5) is installed below the U-shaped cylinder (21); a second motor is installed at the bottom of the U-shaped frame (5); a threaded rod (51) is mounted on the second motor; a screw cylinder (52) is screw-driven on the threaded rod (51); a sealing plate (54) is installed on the top of the screw cylinder (52), and the sealing plate (54) extends through one of the through holes (24) into one of the material grooves (23) of the turntable (22); a reaction vessel (6) is provided below the other through hole (24), and the feed inlet (61) of the reaction vessel (6) is opposite to the through hole (24); Below the first rectangular rod (43), a second rectangular rod (44) is rotatably mounted on the upright rod (42); in the initial state, the top of the second rectangular rod (44) is located in the rectangular groove (25) at the bottom of the U-shaped tube (21), thereby limiting the second rectangular rod (44); The outer ring of the screw cylinder (52) is fixed with a ring (56); T-shaped rods (57) are evenly arranged inside the ring (56), and the top of the T-shaped rods (57) is spherical; a spring is connected between the T-shaped rods (57) and the ring (56); the bottom of the sealing plate (54) is fixed with evenly arranged arc-shaped blocks (58), and the arc-shaped blocks (58) intersect with the T-shaped rods (57).

2. The chemical material quantitative supply device according to claim 1, characterized in that: Each turntable (22) has a fixed limiting ring (26) on its outer ring surface; the inner ring surface of the U-shaped cylinder (21) is provided with uniformly arranged annular grooves (27), and the limiting rings (26) slide in the annular grooves (27).

3. The chemical material quantitative supply device according to claim 1, characterized in that: The outer ring of the U-shaped cylinder (21) is fixed with evenly arranged support blocks (28); each support block (28) is provided with a weighing sensor (29), and the weighing sensor (29) is installed on the support frame (2), and the weighing sensor (29) is used to weigh the U-shaped cylinder (21) and its internal and bottom structures as a whole.

4. The chemical material quantitative supply device according to claim 1, characterized in that: The threaded rod (51) has a third rectangular rod (55) sliding inside; the top of the third rectangular rod (55) is fixed to the bottom of the sealing plate (54); the screw cylinder (52) rotates at the bottom of the sealing plate (54).

5. The chemical material quantitative supply device according to claim 1, characterized in that: A second electric push rod (32) is installed on the top plate (3); a push plate (33) is installed on the extension rod of the second electric push rod (32); a circular groove is opened on the top plate (3), and the push plate (33) is initially located in the circular groove; the circular groove is opposite to the feed trough (23) of the turntable (22) which is far away from the screw metering feeder (1).

6. The chemical material quantitative supply device according to claim 3, characterized in that: The reactor (6) has a rotating roller (62) inside, and the roller (62) is driven by a third motor; the roller (62) is equipped with a scraper.

7. The chemical material quantitative supply device according to claim 6, characterized in that: The scraper includes a fixed plate (63) and a sliding plate (64); the sliding plate (64) slides inside the fixed plate (63), and the sliding plate (64) slides inside the fixed plate (63) by means of a spring.

8. A method for quantitatively measuring chemical raw materials, characterized in that: This method is applicable to the quantitative supply device according to any one of claims 1-7, and includes the following steps: Step 1: Process chemical raw materials, remove impurities and lumps, and control the moisture content to ≤5%; clean the cavity and discharge pipe residue of the screw feeder (1), and calibrate its weighing sensor; Step 2: Input the process preset feeding amount and feeding rate into the control system of the screw feeder (1); Volumetric constant speed, gravimetric constant weight loss rate; Step 3: Start the screw feeder (1), and the equipment automatically adjusts the screw speed according to the rate of weight loss to feed the material; simultaneously monitor the weighing data of the supporting structure and compare it with the metering value of the screw feeder (1) in real time. When the deviation exceeds the threshold, the screw feeder (1) is finely adjusted to supplement the feed. Step 4: After the material feeding reaches the standard, clean the material adhering to the inner wall of the equipment, record the metering data of the screw feeder (1), and periodically recalibrate its weighing sensor (29) to prepare for the next batch of metering.

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