Raw material conveying device for producing insulating powder coating

Abstract

The invention discloses a raw material conveying device for producing an insulating powder coating, and relates to the technical field of pneumatic conveying, the raw material conveying device comprises an air feeder, a first pipe body, a material conveying bin, a second pipe body and a processing bin which are sequentially connected in series, and the material conveying bin is sequentially connected with a material stirring bin, a quantitative discharging assembly and a material supply bin in series; wherein the second pipe body comprises a straight pipe part and a bent pipe part which are sequentially connected in series, a self-adaptive guide assembly is arranged in the bent pipe part, and the self-adaptive guide assembly can automatically adjust the guide angle according to the flow pressure; and the self-adaptive guide assembly comprises a guide plate, the guide plate is rotatably arranged in the bent pipe part through a shaft body, and the guide plate is close to the inner bent crown part of the bent pipe part, so that self-adaptive elbow flow guiding is achieved, material impact is reduced, and material deposition in a low-speed area is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of pneumatic conveying, and specifically to a raw material conveying device for producing insulating powder coatings. Background Art

[0002] In the production system of insulating powder coatings, the raw material conveying link plays a crucial role and is the core hub affecting product quality and production efficiency. Powdery or granular raw materials such as resins, fillers, and additives must be accurately conveyed to the mixing or reaction process through a well-sealed and stable operating conveying system to ensure that the coatings have excellent key performance indicators such as insulation and adhesion, and to ensure that their quality meets the established standards.

[0003] However, traditional raw material conveying devices have exposed a series of defects in terms of structural durability and control accuracy.

[0004] From the perspective of structural durability, the fixed-curvature elbow is a typical shortcoming of traditional pneumatic conveying systems. During the conveying operation, powder particles will impact the side wall of the elbow under the action of thrust, resulting in an abnormally high local wear rate in this area.

[0005] In terms of control accuracy, the accuracy of raw material ratio plays a decisive role in the dielectric strength and mechanical properties of insulating powder coatings. Traditional screw scales mainly rely on external weighing sensors for measurement, but this measurement method is extremely vulnerable to equipment vibration and dust interference, resulting in a high fluctuation range of accuracy.

[0006] Therefore, it is necessary to provide a raw material conveying device for producing insulating powder coatings to solve the above problems. Summary of the Invention

[0007] To solve the above problems, the present invention provides the following technical solution: A raw material conveying device for producing insulating powder coatings, comprising a blower, a first pipe body, a feeding bin, a second pipe body, and a treatment bin connected in series in sequence, wherein a feeding bin, a quantitative feeding assembly, and a feeding supply bin are connected in series on the feeding bin in sequence; Among them, the second pipe body includes a straight pipe portion and a bent pipe portion connected in series in sequence, and an adaptive guiding assembly is arranged in the bent pipe portion, and the adaptive guiding assembly can automatically adjust the guiding angle according to the flow pressure; The adaptive guiding assembly includes a guiding plate, the guiding plate is rotatably arranged in the bent pipe portion by a shaft body, and the guiding plate is close to the inner crown portion of the bent pipe portion.

[0008] Further, preferably, a return spring is connected between one end of the guiding plate and the inner crown portion.

[0009] Furthermore, preferably, a driving member is embedded in the curved pipe portion, and the driving member can drive the guide plate to deflect, thereby adjusting the guide angle.

[0010] Furthermore, preferably, there is an angle A between the driving member and the guide plate, and the angle A is 30°-60°.

[0011] Furthermore, preferably, the quantitative blanking component includes: An outer cylinder having a feeding end and a feeding end, wherein the feeding end is communicated with the feeding bin, and the feeding end is communicated with the diverting bin; an auger rotatably disposed in the outer cylinder; a measuring rod, which radially slides into the outer cylinder and is close to the tail of the auger; The telescope is fixed to the outside of the outer cylinder and is used to drive the measuring rod to move radially. The telescope is provided with a strain gauge for measuring the movement resistance of the measuring rod.

[0012] Further, as a preference, a contraction portion, a straight portion and an expansion portion are integrally formed inside the outer cylinder and are located at the tail of the auger, wherein the measuring rod radially slides and extends into the straight portion.

[0013] Furthermore, preferably, a straightening cylinder for providing straightening guidance for the measuring rod is fixedly embedded in the outer cylinder.

[0014] Furthermore, preferably, a material diverting plate is rotatably provided in the material diverting bin, and the material diverting plate can separate the material diverting bin into multiple independent areas.

[0015] Compared with the prior art, the present invention provides a raw material conveying device for producing insulating powder coatings, which has the following beneficial effects: In the present invention, the blower, first pipe body, material transport bin, second pipe body, and processing bin are connected in series, resulting in a compact structure, small footprint, and easy installation and maintenance. Furthermore, the components work together to achieve efficient material transportation and processing.

[0016] In this invention, the drive element can provide additional driving force under special operating conditions, enabling active deflection of the guide plate, thereby achieving conveying guidance and reducing wear on the elbow. This adjustment mechanism enables the device to flexibly cope with various complex conveying conditions, ensuring stable and reliable material transportation.

[0017] In the present invention, the resistance experienced by the measuring rod in the quantitative feeding component can more accurately reflect the actual condition of the material, thereby improving the accuracy of the feeding amount measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The front view structural schematic diagram of a raw material conveying device for producing insulating powder coatings; Figure 2 The structural schematic diagram of the second pipe body in a raw material conveying device for producing insulating powder coatings; Figure 3 The structural schematic diagram of the quantitative feeding component in a raw material conveying device for producing insulating powder coatings; Figure 4 It is Figure 3 The enlarged structural schematic diagram at position B in In the figure: 1, air blower; 2, first pipe body; 3, feeding bin; 4, material distributing bin; 5, material distributing plate; 6, second pipe body; 7, processing bin; 8, quantitative feeding component; 9, feeding supply bin; 61, straight pipe part; 62, elbow pipe part; 63, guiding plate; 64, shaft body; 65, return spring; 66, driving part; 81, outer cylinder; 82, auger; 83, contraction part; 84, straight cylinder part; 85, expansion part; 86, measuring rod; 87, centering cylinder; 88, expander. Specific embodiments

[0019] The terms "first", "second", etc. in the description, claims and the above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances, which is only a way of distinction adopted when describing objects with the same attributes in the embodiments of this application. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion, so that a process, method, system, product or device including a series of units does not have to be limited to those units, but may include other units not clearly listed or inherent to these processes, methods, products or devices.

[0020] Embodiment: Please refer to Figures 1 - 4 In the embodiment of the present invention, a raw material conveying device for producing insulating powder coatings is provided, including an air blower 1, a first pipe body 2, a feeding bin 3, a second pipe body 6 and a processing bin 7 connected in series in sequence, wherein a material distributing bin 4, a quantitative feeding component 8 and a feeding supply bin 9 are connected in series on the feeding bin 3 in sequence; Among them, the second pipe body 6 includes a straight pipe part 61 and an elbow pipe part 62 connected in series in sequence, and a plurality of adaptive guiding components are arranged in the elbow pipe part 62, and the adaptive guiding components can automatically adjust the guiding angle according to the flow pressure.

[0021] During implementation, it includes the following steps: Step 1: The insulating powder coating raw materials in the feeding bin 9 enter the feeding bin 4 in a set amount under the control of the quantitative feeding component 8. After the feeding bin 4 buffers the raw materials (insulating powder coating raw materials), the raw materials enter the material conveying bin 3.

[0022] Step 2: The blower 1 starts to work, generating an air flow with a certain pressure and flow rate. The air flow enters the material conveying bin 3 through the first pipe body 2 and mixes with the raw materials to form a gas-solid two-phase flow.

[0023] Step 3: The gas-solid two-phase flow enters the second pipe body 6 under the action of the air flow. In the second pipe body 6, it first passes through the straight pipe part 61 and then enters the bent pipe part 62.

[0024] Step 4: In the bent pipe part 62, the adaptive guiding component adjusts the guiding angle according to the flow pressure, enabling the air flow and the raw material mixture (gas-solid two-phase flow) to pass through the bent pipe part 62 more smoothly and reducing the wear on the inner wall of the bent pipe part 62.

[0025] Step 5: The gas-solid two-phase flow passing through the bent pipe part 62 enters the processing bin 7. In the processing bin 7, the raw materials are separated from the air flow, and the raw materials are collected for subsequent processing.

[0026] In this embodiment, the raw materials are in a suspended state in the second pipe body 6 through pneumatic conveying, avoiding the direct contact and long-term accumulation of the raw materials with the inner wall of the second pipe body 6, effectively preventing the adhesion of the raw materials in the second pipe body 6. At the same time, the impact of the air flow can also disperse the adhered raw materials.

[0027] In addition, the adaptive guiding component can automatically adjust the guiding angle according to the flow pressure, dynamically respond to the change of the flow pressure, balance the pressure loss and wear, and break through the limitation of the "fixed curvature" of the traditional elbow. It makes the air flow and the raw material mixture flow more smoothly in the bent pipe part 62, reduces the impact and wear of the mixture on the inner wall of the bent pipe part 62, and extends the service life of the second pipe body 6.

[0028] Specifically, the adaptive guiding component includes a guiding plate 63. The guiding plate 63 is rotatably arranged in the bent pipe part 62 by a shaft body 64, and the guiding plate 63 is close to the inner bending crown part of the bent pipe part 62.

[0029] The inner bending crown part refers to: in the bent pipe part 62, the position where the inner wall is close to the long radius.

[0030] In addition, a return spring 65 is connected between one end of the guiding plate 63 and the inner bending crown part.

[0031] In addition, a driving part 66 is embedded in the bent pipe part 62. The driving part 66 can drive the guiding plate 63 to deflect, thereby adjusting the guiding angle.

[0032] When the driving member 66 is not working, the guide plate 63 is in its initial position under the action of the return spring 65. Since the guide plate 63 is close to the inner curved crown of the elbow portion 62 and is rotatably arranged through the shaft body 64, at this time, the return spring 65 provides a pulling force that causes the guide plate 63 to tend to maintain a certain angle, and this angle helps to guide the air flow and the raw material mixture to form a relatively stable flow trajectory in the elbow portion 62.

[0033] In an alternative embodiment, the driving member 66 is a jet head; When encountering special working conditions, such as a sudden increase in the raw material flow rate, a large change in the air flow velocity, or a risk of blockage in the pipeline, etc., the jet head embedded in the elbow portion 62 starts to work. The jet head can eject air flow in a specific direction and velocity according to a preset control signal towards the guide plate 63.

[0034] The air flow ejected by the jet head generates an additional driving force on the guide plate 63, causing the guide plate 63 to overcome the pulling force of the return spring 65 and deflect. By precisely controlling the ejection parameters of the jet head, the deflection angle of the guide plate 63 can be precisely adjusted, thereby changing the flow direction and velocity distribution of the air flow and the raw material mixture in the elbow portion 62. For example, when it is detected that there may be a blockage at a certain place in the pipeline, the jet head can drive the guide plate 63 to deflect, so that the mixture flows more to the unblocked area, avoiding the occurrence or expansion of the blockage.

[0035] In addition, by precisely adjusting the angle of the guide plate 63, the flow trajectory of the air flow and the raw material mixture in the elbow portion 62 can be optimized, reducing the impact and wear of the mixture on the inner wall of the elbow portion 62. Especially when processing easily worn insulating powder coating raw materials, this optimization can effectively extend the service life of the elbow portion 62 and reduce the equipment maintenance cost.

[0036] Furthermore, there is an included angle A between the jet head and the guide plate 63, and the included angle A is 30° - 60°; The jet can eject dry gas.

[0037] Among them, the dry gas directly purges the inner side of the elbow portion 62 to prevent the material from absorbing moisture and caking. At the same time, the gas sweeps the inner wall of the elbow portion 62 to remove moisture and fine powder. Further, when the raw material adheres, the jet head can be switched to a high-frequency pulse mode (0.5 MPa, 10 times per second), and cooperate with the guide plate 63 to vibrate and shake off the accumulated material.

[0038] Of course, in some very rare cases, when the gas-solid two-phase flow passes through, it may cause blockage at the jet head, resulting in the inability to eject dry gas at the jet head; therefore, in another alternative embodiment, the driving member 66 is a micro-expander, and the guide plate 63 is directly driven by the micro-expander, and the micro-expander can be a magnetostrictive expander.

[0039] In this embodiment, the quantitative feeding assembly 8 includes: An outer cylinder 81, which has a feeding end and a discharging end, wherein the feeding end is communicated with the feeding bin 9, and the discharging end is communicated with the material distributing bin 4; A screw conveyor 82, which is rotatably arranged in the outer cylinder 81; A measuring rod 86, which radially slides into the outer cylinder 81 and is close to the tail of the screw conveyor 82; An expander 88, which is fixed to the outside of the outer cylinder 81 and is used to drive the measuring rod 86 to move radially. A strain gauge is arranged in the expander 88 for measuring the moving resistance of the measuring rod 86.

[0040] Therefore, during implementation, the following steps are included: Step 1: The raw materials in the feeding bin 9 enter the inside of the outer cylinder 81 through the feeding end of the outer cylinder 81. The screw conveyor 82 rotates to push the raw materials to move along the outer cylinder 81 towards the discharging end, realizing the transportation of the raw materials.

[0041] Step 2: When it is necessary to measure the discharging amount, the expander 88 drives the measuring rod 86 to move radially, so that the measuring rod 86 gradually approaches and inserts into the raw materials. Since the raw materials will generate resistance to the measuring rod 86, the measuring rod 86 will be hindered during the moving process.

[0042] Step 3: The strain gauge in the expander 88 will measure the resistance suffered by the measuring rod 86 during the moving process. This resistance is related to factors such as the density and volume of the raw materials and the depth of the measuring rod 86 inserted into the raw materials.

[0043] Step 4: According to the preset algorithm and model, combined with the resistance value F measured by the strain gauge, the size of the discharging amount Q at the current moment can be deduced. Specifically, under laboratory conditions, by the method of controlling variables (such as fixing the raw material density, the insertion depth of the measuring rod 86, etc.), the resistance value F under different feeding rates is measured. Using the experimental data for fitting, a linear relationship between F and Q is established.

[0044] The specific fitting process can be as follows: (1) In a constant temperature and humidity environment, select representative raw material samples, and fix the raw material density ρ and the insertion depth h of the measuring rod 86; (2) Control the rotation speed n of the screw conveyor so that the discharging amount Q at the current moment changes within the set range; (3) Synchronously collect the resistance values F corresponding to each Q value, and collect no less than 200 groups of data for each Q value point; (4) Adopt the least squares method for linear regression analysis to establish an initial model: Q = k*(F - F0)+Q0; Wherein: k is the slope coefficient (unit: kg·s / N), which is calculated by Q / ΔF; F0 is the no-load reference resistance value; Q0 is the system error compensation amount (determined by least squares residual analysis).

[0045] In other words, in this embodiment, the strain gauges in the measuring rod 86 and the expansion joint 88 cooperate to measure the resistance of the raw material to the measuring rod 86, thereby inferring the discharge amount. Furthermore, in some cases, the expansion joint 88 may be disturbed by the auger's rotation. Therefore, the auger can be briefly stopped during the measurement phase to completely eliminate rotational interference. Compared to traditional material discharge methods, the quantitative discharge assembly 8 can monitor the changes in resistance during the discharge process in real time, thereby inferring the discharge amount in real time. If the discharge amount deviates from the set value, the auger 82's speed or other relevant parameters can be adjusted promptly, achieving dynamic control of the discharge amount and ensuring production stability and product quality.

[0046] Furthermore, a contraction portion 83 , a straight portion 84 and an expansion portion 85 are integrally formed inside the outer cylinder 81 and are located at the tail of the auger 82 , wherein the measuring rod 86 radially slides and extends into the straight portion 84 .

[0047] The design of the contraction section 83 squeezes the raw material before it enters the straight section 84, allowing it to be more tightly conveyed by the auger 82 and ensuring that the measuring rod 86 can detect the presence of resistance during measurement. The straight section 84 provides a stable measurement environment for the measuring rod 86. Within the straight section 84, the movement of the raw material is relatively uniform, and the resistance experienced by the measuring rod 86 can more accurately reflect the actual state of the raw material, thereby improving the accuracy of the feed rate measurement. Finally, the design of the expansion section 85 facilitates smoother discharge of the raw material upon exiting the outer cylinder 81, reducing the amount of raw material remaining inside the outer cylinder 81 and minimizing the risk of raw material waste and cross-contamination.

[0048] Furthermore, a straightening cylinder 87 for providing straightening guidance for the measuring rod 86 is fixedly embedded in the outer cylinder 81 .

[0049] In this embodiment, the centering cylinder 87 provides precise centering guidance for the measuring rod 86, ensuring that the measuring rod 86 maintains linear motion during radial movement, thus preventing measurement errors caused by deviation of the measuring rod 86. For example, without the centering cylinder 87, the measuring rod 86 might tilt due to material pressure, resulting in inaccurate resistance values measured by the strain gauge. The presence of the centering cylinder 87 effectively resolves this problem.

[0050] In this embodiment, a material diverting plate 5 is rotatably provided in the material diverting bin 4 , and the material diverting plate 5 can separate the material diverting bin 4 into a plurality of independent areas.

[0051] Among them, the rotation of the material pushing plate 5 can reduce the pause and waiting time of the raw materials during the conveying process. Compared with the traditional intermittent conveying method, this structure can significantly improve the conveying efficiency of the raw materials and speed up the production rhythm.

[0052] In addition, since the amount of raw materials in each independent area is relatively stable, the material pushing plate 5 can ensure that the raw materials are evenly conveyed to the subsequent processes during the material pushing process, avoiding production fluctuations caused by uneven raw material supply, and improving the production stability and product quality.

[0053] The above is only the preferred specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, should be covered by the protection scope of the present invention.

Claims

1. A raw material conveying device for producing insulating powder coatings, characterized in that It comprises a blower (1), a first pipe body (2), a feeding bin (3), a second pipe body (6) and a processing bin (7) connected in series in sequence, wherein the feeding bin (3) is connected in series with: a material shifting bin (4), a quantitative unloading assembly (8) and a material supply bin (9); The second tube body (6) comprises a straight tube portion (61) and a curved tube portion (62) connected in series, and an adaptive guide component is provided in the curved tube portion (62), and the adaptive guide component can automatically adjust the guide angle according to the flow pressure; The adaptive guide assembly comprises a guide plate (63), wherein the guide plate (63) is rotatably arranged in the curved tube portion (62) by means of a shaft (64), and the guide plate (63) is close to the inner curved crown portion of the curved tube portion (62).

2. The raw material conveying device for producing insulating powder coatings according to claim 1, wherein, A return spring (65) is connected between one end of the guide plate (63) and the inwardly curved crown portion.

3. The raw material conveying device for producing insulating powder coatings according to claim 1, characterized in that, A driving member (66) is also embedded in the curved tube portion (62), and the driving member (66) can drive the guide plate (63) to deflect, thereby adjusting the guide angle.

4. The raw material conveying device for producing insulating powder coatings according to claim 3, wherein, An included angle A exists between the driving member (66) and the guide plate (63), and the included angle A is 30°-60°.

5. A raw material conveying device for producing insulating powder coatings according to claim 1, characterized in that, The quantitative blanking component (8) comprises: An outer cylinder (81) having a feeding end and a feeding end, wherein the feeding end is connected to the feeding bin (9), and the feeding end is connected to the material shifting bin (4); An auger (82) rotatably disposed in the outer cylinder (81); a measuring rod (86) which radially slides into the outer cylinder (81) and is close to the tail of the auger (82); The telescope (88) is fixed to the outside of the outer cylinder (81) and is used to drive the measuring rod (86) to move radially, and a strain gauge is provided in the telescope (88) to measure the movement resistance of the measuring rod (86).

6. The raw material conveying device for producing insulating powder coatings according to claim 5, wherein, The outer cylinder (81) is integrally formed with a contraction portion (83) located at the tail of the auger (82), a straight cylinder portion (84), and an expansion portion (85), wherein the measuring rod (86) radially slides and extends into the straight cylinder portion (84).

7. The raw material conveying device for producing insulating powder coatings according to claim 5, characterized in that, A straightening cylinder (87) for providing a straightening guide for the measuring rod (86) is also fixedly embedded in the outer cylinder (81).

8. The raw material conveying device for producing insulating powder coatings according to claim 1, wherein, A material diverting plate (5) is rotatably provided in the material diverting bin (4), and the material diverting plate (5) can separate the material diverting bin (4) into a plurality of independent areas.

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