Apparatus for quantitative delivery of heavy calcium carbonate into a splash-proof material guiding hopper

Abstract

The utility model discloses a heavy calcium carbonate device of quantitative conveying splashproof material guiding hopper relates to calcium carbonate processing equipment field, including conveying belt, hopper, inclined baffle and rubber elastic sheet, and the core innovation point is the discharge port flow observation window, adjustable quantitative baffle and spliced discharge port splashproof coaming, adjustable quantitative baffle is located in the hopper discharge port inboard, and the effective unloading width is changed through adjustable screw rod, the discharge port flow observation window is equipped with high accuracy horizontal scale to the baffle, and the inboard is coated anti -fog coating, and the spliced discharge port splashproof coaming is 3 detachable cold -rolled steel sheets, and the enclosure forms "U type " splashproof structure. The device solves the defect that the prior art has no quantitative adjustment, no splashproof protection, no flow monitoring, and adapts to heavy calcium carbonate efficient conveying demand.

Description

Technical Field

[0001] This utility model relates to the field of calcium carbonate processing equipment, and in particular to a device for quantitatively conveying heavy calcium carbonate in a splash-proof guide hopper. Background Technology

[0002] Heavy calcium carbonate, a key category of inorganic non-metallic mineral fillers, accounts for 30%-60% of raw materials in industries such as artificial marble, coatings, and plastics due to its wide availability, low cost, and strong chemical stability. In artificial marble production, the metering accuracy of heavy calcium carbonate directly determines the balance of resin and filler ratios—excessive fluctuations in the feed rate can easily lead to bubbles, cracks, or even insufficient strength and breakage on the product surface, significantly increasing the scrap rate. In water-based coating production, the transport stability of heavy calcium carbonate affects the uniformity of coating consistency; excessive deviations require rework and adjustment, significantly increasing production costs.

[0003] While existing heavy calcium carbonate conveying systems reduce material adhesion on the conveyor belt through inclined baffles and rubber elastic sheets, they still suffer from three major technical challenges: First, they lack a quantitative adjustment structure, relying solely on adjusting the vertical distance between the hopper outlets to control the discharge speed. This makes it impossible to precisely limit the discharge width, resulting in uneven material distribution on the conveyor belt and failing to meet the demands of high-precision production. Second, they lack splash protection design. The height difference between the hopper outlet and the conveyor belt makes it easy for powdered calcium carbonate to splash due to airflow disturbances or conveyor belt vibrations, causing material waste and polluting the workshop environment. This does not meet the dust concentration requirements of the "Occupational Exposure Limits for Hazardous Factors in Industrial Sites" (GBZ2.1-2019), and long-term exposure can easily lead to respiratory diseases among operators. Third, they lack a visual monitoring function for flow rate. Operators can only indirectly judge the conveying status through the material accumulation in subsequent processes or product testing results, which has a significant lag and can easily lead to production line shutdowns or the scrapping of semi-finished products.

[0004] Furthermore, existing improvement solutions mostly target single technical pain points and lack a synergistic system: some quantitative adjustment devices require cutting and modifying the main structure of the hopper, resulting in high modification costs and poor adaptability, making them incompatible with existing equipment; some splash-proof structures use a fixed, fully enclosed design, which, while reducing splashing, hinders daily maintenance and easily leads to material clumping and blockage at the discharge port. Therefore, there is an urgent need for an innovative solution that requires no modification to the original equipment body, can be modularly installed, has a simple structure, and can simultaneously achieve quantitative adjustment, flow monitoring, and splash protection to meet the low-cost technology upgrade needs of enterprises.

[0005] The above background information is provided only to aid in understanding the concept and technical solution of this utility model. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above information was disclosed on the filing date of this patent application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Utility Model Content

[0006] This invention aims to overcome the shortcomings of existing heavy calcium carbonate conveying devices, such as lack of quantitative adjustment, splash protection, and flow monitoring, and provides a heavy calcium carbonate device with a quantitative conveying and splash-proof guide hopper.

[0007] Therefore, the present invention adopts the following technical solution:

[0008] A device for conveying heavy calcium carbonate with a quantitative conveying anti-splash guide hopper includes a conveyor belt and a hopper positioned above one end of the conveyor belt. The outlet of the hopper is located above the conveyor belt. Inclined baffles are provided on both sides of the conveyor belt and located on both sides of the outlet of the hopper. The lower end of each inclined baffle is provided with a rubber elastic sheet that contacts the surface of the conveyor belt. An adjustable quantitative baffle is provided on the inner side of the lower edge of the outlet of the hopper. An outlet flow observation window is embedded on the outer side of the hopper corresponding to the position of the adjustable quantitative baffle. A spliced ​​outlet anti-splash guard is provided on the outer periphery of the outlet of the hopper. The spliced ​​outlet anti-splash guard is formed by splicing three independent rectangular cold-rolled steel plates together with snap fasteners to form a "U" structure.

[0009] Preferably, the present invention may also have the following technical features:

[0010] Preferably, the adjustable metering baffle is a vertically arranged single-layer 304 stainless steel structure.

[0011] Preferably, the right edge of the adjustable metering baffle is welded and fixed to one end of a horizontally arranged adjustable screw, and the other end of the adjustable screw passes through the right side wall of the hopper outlet and extends to the outside.

[0012] Preferably, the discharge port flow observation window is a double-layer transparent acrylic window with an inner layer coated with a nano anti-fog coating and a total thickness of 5-6mm. The inner side of the observation window is laser-engraved with flow scale lines distributed in the horizontal direction, and the quantitative baffle movement distance and the corresponding discharge flow value are simultaneously marked next to each scale line.

[0013] Preferably, a metal indicator is provided next to the scale of the discharge port flow observation window. The metal indicator is an L-shaped brass structure, with one end fixed to the inside of the observation window and the other end facing the scale line. The surface is coated with highly visible fluorescent red paint to accurately indicate the current flow value.

[0014] Preferably, the three cold-rolled steel plates of the spliced ​​discharge port splash guard are respectively the "front splash guard", "left splash guard" and "right splash guard", with a thickness of 1.5-1.8mm for each plate and a polyvinyl fluoride anti-stick coating on the surface.

[0015] Preferably, the discharge port of the hopper is composed of an upper frame, a lower frame, and a canvas tube, and 2-4 adjusting bolts are evenly distributed circumferentially between the upper frame and the lower frame.

[0016] Preferably, a spiral rod with spiral blades is provided between the lower cylinder of the hopper and the discharge port. The spiral rod is driven by an electric motor, and the front splash guard of the spliced ​​discharge port splash guard is provided with a clearance opening corresponding to the position of the spiral rod.

[0017] Preferably, the angle between the inclined baffle and the surface of the conveyor belt is 55°-65°.

[0018] Preferably, the conveyor belt includes a base belt, a surface anti-slip textured layer, and a drive roller. The base belt is made of polyurethane, the surface anti-slip textured layer has a diamond-shaped raised structure, and the drive roller is driven by a geared motor with adjustable speed.

[0019] The beneficial effects of this utility model compared with the prior art include:

[0020] 1. Improve material cutting accuracy and solve the pain point of product quality fluctuation.

[0021] This utility model features an adjustable quantitative baffle with high adjustment precision. Operators can move the baffle by adjusting the screw to change the effective width of the discharge port, and then fix the position with a nut to ensure stable flow. This structure can avoid feeding deviations caused by uneven material distribution, improve the accuracy of raw material proportioning, and reduce product quality fluctuations. At the same time, the single-layer stainless steel structure has sufficient strength to prevent deformation over long-term use, extend service life, and reduce maintenance costs.

[0022] 2. Enables visual monitoring of fog prevention, eliminating blind spots in production operations.

[0023] This utility model's outlet flow observation window solves the problems of fogging and difficulty in reading scales in traditional scale windows through a "double-layer anti-fog coating + fluorescent indicator" design: the anti-fog coating reduces dust adhesion, ensuring long-term clear scales; the fluorescent indicator is clearly identifiable under different lighting conditions in the workshop, facilitating real-time reading of flow values ​​by operators. If the indicator deviates from the set scale during production, it immediately indicates canvas tube deformation or screw rod loosening, allowing for rapid adjustment and preventing further losses. Simultaneously, the scale design of the observation window allows the device to adapt to different flow requirements, expanding its application scenarios.

[0024] 3. Achieve detachable splash protection, balancing economy and ease of maintenance.

[0025] This utility model's modular discharge port splash guard utilizes a "three-sided shielding + anti-stick coating" design to reduce splashing at the source: the front splash guard blocks material from splashing in the conveying direction, the left and right splash guards block lateral splashing, and the anti-stick coating reduces material adhesion to the inside of the guard, preventing clumping and blockage. This structure reduces material waste, lowers the operating requirements of dust removal equipment, and balances economic and environmental benefits. Furthermore, the modular design of the guard allows for quick disassembly, facilitating routine cleaning of the discharge port and solving the problem of difficult maintenance associated with traditional fixed guard guards. Attached Figure Description

[0026] Figure 1 This is a front view of the present invention;

[0027] Figure 2 This is a detailed drawing of the hopper of this utility model;

[0028] Figure 3 This is a detailed drawing of the adjustable quantitative baffle of this utility model;

[0029] In the diagram: 1. Hopper; 11. Upper cylinder; 12. Filter screen; 13. Top cover; 14. Inlet; 15. Screw rod; 16. Motor; 17. Lower cylinder; 2. Spliced ​​outlet splash guard; 21. Front splash guard; 3. Clearance opening; 4. Bolt; 5. Conveyor belt; 6. Outlet flow observation window; 61. Scale line; 62. Metal indicator; 63. Adjusting bolt; 7. Outlet; 71. Canvas pipe; 72. Upper frame edge; 73. Lower frame edge; 74. Adjusting bolt; 8. Inclined baffle; 9. Rubber elastic sheet; 10. Adjustable metering baffle; 101. Adjustable screw. Detailed Implementation

[0030] I. Composition and Connection Relationship of the Quantitative Conveying Anti-Splash Guide Hopper for Heavy Calcium Carbonate of this Utility Model

[0031] Figures 1-3 As shown in the schematic diagram of this utility model, the conveyor belt 5 is horizontal and fixed to the ground by a metal frame. The hopper 1 is fixed directly above one end of the conveyor belt 5 by four vertical supports. The discharge port 7 of the hopper 1 is vertically aligned with the middle of the conveyor belt 5. The initial distance between the lower edge of the discharge port 7 and the surface of the conveyor belt 5 is 80mm. This distance can be finely adjusted by adjusting the height of the supports to ensure compatibility with the subsequent quantitative adjustment structure.

[0032] There are two inclined baffles 8, both made of Q235 steel plate, located on the left and right sides of the discharge port 7 of hopper 1 respectively. The angle between the baffle 8 and the surface of the conveyor belt 5 is 50°. The lower edge of the baffle 8 is fixed with a rubber elastic sheet 9 by rivets. The lower end of the elastic sheet is in close contact with the surface of the conveyor belt 5, and the contact pressure is controlled at 0.1MPa, thereby removing residual material from the surface of the conveyor belt 5.

[0033] The adjustable metering baffle 10 is a single-layer 304 stainless steel plate, vertically attached to the inner surface of the lower frame edge 73 of the discharge port 7 of the hopper 1. The right edge of the adjustable metering baffle 10 is fixedly connected to the left end of the adjustable screw 101 by argon arc welding. The adjustable screw 101 passes horizontally through the right frame of the discharge port 7 of the hopper 1, and the right end of the adjustable screw 101 extends to the outside of the hopper. Tightening the nut locks the position of the adjustable metering baffle 10 to prevent displacement due to vibration. The top of the adjustable metering baffle 10 is tightly attached to the lower end of the canvas tube 71 of the discharge port 7 of the hopper 1. The joint is sealed with a silicone sealing strip using strong adhesive to prevent material leakage. The bottom of the adjustable metering baffle 10 maintains a distance of at least 15mm from the surface of the conveyor belt 5 and does not contact the conveyor belt 5.

[0034] The discharge port flow observation window 6 is a double-layered transparent acrylic plate. The inner surface is coated with a nano-anti-fog coating and is fixed to the outer wall of the hopper by four adjusting bolts 63. The inner side of the observation window is aligned with the horizontal center line of the adjustable metering baffle 10. The inner side of the observation window is laser-engraved with flow scale lines 61 distributed horizontally. Next to each scale line 61, a corresponding "baffle movement distance - flow rate" label is printed in black ink. Next to the scale lines 61 of the observation window, an L-shaped brass indicator 62 is fixed with epoxy resin. The surface of the metal indicator 62 is coated with fluorescent red paint, with its long side facing the scale line 61 and its end attached to the inner side of the observation window, for accurately indicating the current flow rate value.

[0035] The spliced ​​discharge port splash guard 2 is composed of three cold-rolled steel plates: a front splash guard 21, a left splash guard, and a right splash guard. All three plates are coated with a polyvinyl fluoride anti-stick coating. The front splash guard 21 is fixed to the outer wall of the discharge port 7 of the hopper 1, near the conveyor belt 5, using adjusting bolts 4. The left and right splash guards are spliced ​​to the left and right ends of the front splash guard 21 via side clips, forming a "U-shaped" structure with the opening facing the conveyor belt 5. The lower end of the guard 2 maintains a 20mm gap from the surface of the conveyor belt 5 to avoid contact wear. A clearance opening 3 is provided on the front splash guard 21 corresponding to the position of the spiral rod 15 between the lower cylinder 17 of the hopper 1 and the discharge port 7.

[0036] The hopper 1 has an "upper cylinder 11 + lower cylinder 17" structure. The upper cylinder 11 is a rectangular cylinder, and the lower cylinder 17 is a four-sided cone that is wider at the top and narrower at the bottom. The upper cylinder 11 and the lower cylinder 17 are fixed together by welding. The discharge port 7 of the hopper 1 consists of an upper frame 72, a lower frame 73, and a canvas tube 71. The canvas tube 71 is fixed between the upper frame 72 and the lower frame 73 by metal clips. Two adjusting bolts 74 are distributed circumferentially between the upper frame 72 and the lower frame 73 for adjusting the frame spacing, which, together with the adjustable metering baffle 10, achieves two-dimensional metering. A horizontally arranged screw rod 15 between the lower cylinder 17 and the discharge port 7 is fixed to a bearing seat on the outside of the hopper 1 by a deep groove ball bearing. One end of the screw rod 15 is connected to a motor 16 via a coupling. The motor 16 is fixed to the outer wall of the hopper 1 by a bracket.

[0037] The top of the upper cylinder 11 of the hopper 1 has a circular inlet 14. The surface of the inlet 14 is hinged to a metal top cover 13. The inside of the inlet 14 is fixed with a stainless steel filter screen 12 by a slot. The edge of the filter screen 12 is in contact with the inner wall of the inlet 14 to prevent unfiltered impurities from entering the hopper 1.

[0038] II. Technical Principle of the Quantitative Conveying Anti-Splash Guide Hopper for Heavy Calcium Carbonate of This Utility Model

[0039] (I) Working principle of adjustable quantitative baffle

[0040] Based on the fluid mechanics principle of "precise matching between particulate material flow rate and effective cross-sectional area of ​​the discharge port": the flow rate of heavy calcium carbonate is related to the effective cross-sectional area of ​​the discharge port, the bulk density of the material, and the material flow velocity. In existing technologies, the cross-sectional area of ​​the discharge port is determined only by the height of the discharge port, and the adjustment range is limited. This invention adds an adjustable quantitative baffle, which moves to the left to block part of the discharge port width, changing the effective width of the discharge port, thereby adjusting the effective cross-sectional area of ​​the discharge port and achieving flow control.

[0041] The specific adjustment process is as follows: Rotate the adjustable screw clockwise → the screw moves to the left under the action of the thread → causing the adjustable metering baffle to move synchronously to the left → the effective width of the discharge port decreases → the flow rate decreases; Rotate the adjustable screw counterclockwise → the screw moves to the right → the baffle moves to the right → the effective width increases → the flow rate increases; When the indicator on the observation window aligns with the target flow rate scale, tighten the nut to lock the position of the adjustable screw. The baffle remains stable, and the flow rate is maintained at the set value. The fit between the top of the baffle and the canvas tube prevents material leakage from the gap, further ensuring metering accuracy.

[0042] (II) Working principle of the discharge port flow observation window

[0043] Flow monitoring is achieved based on "experimental calibration + anti-fog visualization": Before the device leaves the factory, the discharge port height is set for different particle sizes of heavy calcium carbonate, the adjustable quantitative baffle is moved step by step, the baffle movement distance and the actual discharge flow rate are recorded to form a "height-distance-flow rate" comparison table, and the scale line is laser-engraved on the inside of the observation window.

[0044] When in use, first set the discharge port height by adjusting the bolts, then find the corresponding height scale area from the observation window, adjust the baffle to align the indicator with the target flow scale, and quickly complete the setting; during production, the anti-fog coating avoids the scale blurring caused by dust adhesion, the fluorescent indicator ensures accurate flow reading, and operators can monitor the flow status in real time, promptly detect and handle abnormalities (such as baffle loosening, canvas tube deformation), and improve system reliability.

[0045] (III) Working principle of the spliced ​​discharge port splash guard

[0046] Based on the splash-proof logic of "removable shielding + anti-sticking guidance": When heavy calcium carbonate falls from the hopper outlet, it will splash in three directions: "forward (conveying direction), left, and right" due to particle collision and air resistance. The front, left, and right side panels of the spliced ​​enclosure form a "U-shaped" barrier, directly blocking the splashed material in these three directions. The height design of the enclosure can cover the maximum height of material splashing, ensuring the splash-proof effect. The anti-stick coating reduces the adhesion of material on the inside of the enclosure, avoiding blockage caused by clumping. The spliced ​​design makes it easy to disassemble and clean, solving the problem of difficult maintenance of traditional fixed enclosures.

[0047] In addition, the spacing between the side panel and the conveyor belt can prevent wear on the side panel caused by conveyor belt vibration, and at the same time prevent materials from getting stuck in the gap and causing the conveyor belt to jam, thus ensuring a stable conveying process.

[0048] (iv) The principle of the three working together

[0049] The three innovations form a closed-loop collaborative system of "quantitative setting - real-time monitoring - splash protection," which is specifically divided into three stages:

[0050] Flow setting stage: According to production needs, the operator sets the discharge port height through the adjusting bolt of the hopper discharge port → finds the target flow scale corresponding to the height from the discharge port flow observation window → rotates the adjustable screw of the adjustable metering baffle to align the indicator with the target scale → tightens the nut to fix the baffle → splices the 3 discharge port splash guards with the snap fasteners to complete the preparation.

[0051] Stable conveying stage: Heavy calcium carbonate in the hopper falls from the outlet under its own gravity and the propulsion of the screw rod → The spliced ​​baffle blocks splashing in the front, left and right directions, and the anti-stick coating reduces the adhesion of material on the inside of the baffle to avoid clumping and blockage → The inclined baffle further guides the falling material to the middle of the conveyor belt to ensure that the material is evenly distributed on the conveyor belt → The operator monitors the position of the indicator in real time through the flow observation window at the outlet. If the indicator is found to deviate from the set scale, abnormalities such as loose baffles and deformed canvas tubes can be identified in time and adjusted quickly to ensure stable material flow.

[0052] Dynamic adjustment phase: If production demand changes, loosen the nut → rotate the adjustable screw to adjust the position of the baffle, so that the indicator is aligned with the new target flow scale → re-tighten the nut; if dust is found on the outside of the enclosure, check whether the snaps at the splice are loose; if the indicator frequently deviates, check the wear of the screw thread or whether the baffle is deformed, and replace the parts accordingly.

[0053] III. Method of using the quantitative conveying and splash-proof guide hopper for heavy calcium carbonate of this utility model

[0054] Taking the conveying of 200-mesh heavy calcium carbonate in the production of artificial marble as an example, the target flow rate is set as needed, and the usage method is as follows:

[0055] 1. Preliminary preparations

[0056] Component inspection: Confirm that the adjustable metering baffle and the adjustable screw are reliably welded, and the indicator is not bent; the discharge port flow observation window is free of cracks, and the anti-fog coating is not peeling off; the snaps of the spliced ​​side panels are flexible; the rubber elastic sheet of the inclined baffle is not aged and is in close contact with the conveyor belt.

[0057] Equipment cleaning: Open the top cover of the hopper inlet, remove the filter screen, and blow away impurities in the hopper with compressed air; wipe the surface of the conveyor belt to ensure there are no foreign objects; wipe the inside of the observation window with a soft cloth to check that the scale is clear.

[0058] Discharge port height setting: Loosen the adjusting bolt of the discharge port with a wrench, set the discharge port height as required, and tighten the adjusting bolt to ensure that the canvas tube is wrinkle-free.

[0059] 2. Flow settings

[0060] Loosen the nut, rotate the adjustable screw to move the adjustable metering baffle, and observe the indicator on the discharge port flow observation window: stop rotating when the indicator aligns with the target flow scale.

[0061] Tighten the nut to secure the baffle plate; check the fit between the top of the baffle plate and the canvas tube to ensure there are no obvious gaps.

[0062] 3. Start running

[0063] Start the conveyor belt, and after it stabilizes, start the motor to drive the screw to rotate, pushing the material in the hopper toward the discharge port.

[0064] Open the feed inlet and add heavy calcium carbonate (the amount added should not exceed 80% of the volume of the upper cylinder of the hopper), and cover the top cover to prevent dust from overflowing.

[0065] Regularly observe the position of the indicator on the observation window to ensure stable flow; check the splash protection effect of the enclosure; if there is dust on the outside, fine-tune the splicing buckles; check the material distribution on the surface of the conveyor belt; if there is residue on both sides, adjust the angle of the tilt baffle.

[0066] 4. Shutdown and Maintenance

[0067] Shutdown sequence: Stop feeding material into the inlet → Wait until the material in the hopper is basically emptied (observe through the viewing window of the enclosure), then turn off the motor → After the screw stops rotating, turn off the conveyor belt.

[0068] Cleaning and maintenance: Disassemble the spliced ​​enclosure and wipe the inner anti-stick coating; clean the material on the surface of the adjustable metering baffle and check the wear of the screw thread; clean the filter screen, dry it and reinstall it at the feed inlet; regularly add grease to the screw bearing and check the anti-fog coating of the observation window. If it falls off, repaint it.

[0069] Those skilled in the art will recognize that numerous variations are possible with respect to the above description, and the embodiments and figures are merely for describing one or more specific implementations.

[0070] Although exemplary embodiments of the present invention have been described and illustrated, those skilled in the art will understand that various changes and substitutions can be made thereto without departing from the spirit of the present invention. Furthermore, many modifications can be made to adapt specific situations to the doctrine of the present invention without departing from the central concept of the present invention described herein. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but may include all embodiments and equivalents that fall within the scope of the present invention.

[0071] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various substitutions or modifications can be made to these described embodiments without departing from the concept of the present invention, and all such substitutions or modifications should be considered within the protection scope of the present invention.

[0072] Although the present invention and its advantages have been described in detail, it should be understood that various changes, substitutions, and modifications can be made without departing from the spirit and scope of the present invention. Furthermore, the scope of application of the present invention is not limited to the specific embodiments of the processes, manufactures, material compositions, methods, and steps described in the specification. From the disclosure of the present invention, those skilled in the art will readily utilize existing or later-developed processes, machines, manufactures, methods, or steps that substantially perform the same function or achieve the same results as the corresponding embodiments described herein. Therefore, the appended claims are intended to include such processes, machines, manufactures, methods, or steps.

Claims

1. A device for quantitatively conveying heavy calcium carbonate using a splash-proof guide hopper, comprising a conveyor belt and a hopper disposed above one end of the conveyor belt, the outlet of the hopper being located above the conveyor belt, and inclined baffles located on both sides of the conveyor belt at the outlet of the hopper, the lower ends of the inclined baffles being provided with rubber elastic sheets in contact with the surface of the conveyor belt, characterized in that: An adjustable metering baffle is provided on the inner side of the lower edge of the hopper discharge port. A discharge port flow observation window is embedded on the outer side of the hopper corresponding to the position of the adjustable metering baffle. A spliced ​​discharge port splash guard is provided on the outer periphery of the hopper discharge port. The spliced ​​discharge port splash guard is formed by splicing three independent rectangular cold-rolled steel plates together to form a "U" shape.

2. The heavy calcium carbonate conveying device with a splash-proof guide hopper according to claim 1, characterized in that: The adjustable quantitative baffle is a vertically arranged single-layer 304 stainless steel structure.

3. The heavy calcium carbonate conveying device with a splash-proof guide hopper according to claim 1, characterized in that: The right edge of the adjustable metering baffle is welded and fixed to one end of a horizontally arranged adjustable screw, and the other end of the adjustable screw penetrates the right side wall of the hopper outlet and extends to the outside.

4. The heavy calcium carbonate conveying device with a splash-proof guide hopper according to claim 1, characterized in that: The discharge port flow observation window is a double-layer transparent acrylic window with a nano anti-fog coating on the inner layer, with a total thickness of 5-6mm. The inner side of the observation window is laser-engraved with flow scale lines distributed in the horizontal direction, and the quantitative baffle movement distance and the corresponding discharge flow value are marked next to each scale line.

5. The heavy calcium carbonate conveying device with a splash-proof guide hopper according to claim 1, characterized in that: A metal indicator is provided next to the scale of the discharge port flow observation window. The metal indicator is an L-shaped brass structure, with one end fixed to the inside of the observation window and the other end facing the scale line. The surface is coated with highly visible fluorescent red paint to accurately indicate the current flow value.

6. The heavy calcium carbonate conveying device with a splash-proof guide hopper according to claim 1, characterized in that: The three cold-rolled steel plates of the spliced ​​discharge port splash guard are the "front splash guard", "left splash guard" and "right splash guard", with a thickness of 1.5-1.8mm for each plate and a polyvinyl fluoride anti-stick coating on the surface.

7. The heavy calcium carbonate conveying device with a splash-proof guide hopper according to claim 1, characterized in that: The discharge port of the hopper consists of an upper frame, a lower frame, and a canvas tube, with 2-4 adjusting bolts evenly distributed circumferentially between the upper and lower frame.

8. The heavy calcium carbonate conveying device with a splash-proof guide hopper according to claim 1, characterized in that: The lower cylinder of the hopper is provided with a spiral rod with spiral blades between the discharge port and the lower cylinder. The spiral rod is driven by an electric motor. The front splash guard of the spliced ​​discharge port is provided with a clearance opening corresponding to the position of the spiral rod.

9. The heavy calcium carbonate conveying device with a splash-proof guide hopper according to claim 1, characterized in that: The angle between the inclined baffle and the surface of the conveyor belt is 55°-65°.

10. The heavy calcium carbonate conveying device with a splash-proof guide hopper according to claim 1, characterized in that: The conveyor belt includes a base belt, a surface anti-slip textured layer, and a drive roller. The base belt is made of polyurethane, the surface anti-slip textured layer has a diamond-shaped raised structure, and the drive roller is driven by a geared motor with adjustable speed.

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