PVC plastic particle raw material mixing device

Abstract

The utility model relates to mixing device technical field especially is a kind of PVC plastic particle raw material mixing device, including four stand, the outer wall of four stand is sequentially fixed from below to top and is installed with first support plate, second support plate, first support bracket and second support bracket, the right side of first support plate is equipped with second support plate, and the top of first support plate is equipped with spray assembly, the inner wall of first support bracket is fixed and installed with cylinder, and the top of cylinder is fixed and installed with top cover by multiple bolts, the middle of top cover is equipped with stirring assembly. The device can control motor etc. by the control cabinet integrated with PLC, drive the two main paddles, first auxiliary paddle and second auxiliary paddle on rotating shaft to quickly and evenly stir material, eliminate the mixing dead angle by scraper, avoid material residue, use metering pump to atomize and spray the liquid additive in liquid tank from spray nozzle along pipeline, realize perfect and fast mixing of liquid phase and solid phase, improve mixing uniformity, improve mixing efficiency and production quality.

Description

Technical Field

[0001] This utility model relates to the field of mixing device technology, specifically to a PVC plastic particle raw material mixing device. Background Technology

[0002] PVC is a multi-component plastic. Pure PVC resin has poor thermal stability and high brittleness, making it unsuitable for direct processing into finished products. Various additives must be added to improve its processing performance and the physical and mechanical properties of the final product. PVC plastic particle raw material mixing equipment, often referred to as a PVC high-speed mixer or PVC compounding system, is a specialized device that mixes raw materials in various forms (powder, liquid, granules) under specific temperature and shear force conditions into a homogeneous, pre-plasticized, dry, and loose powder. This provides qualified raw materials for subsequent extrusion, calendering, or injection molding processes. It is used to uniformly and efficiently mix polyvinyl chloride (PVC) resin powder with various additives (such as stabilizers, plasticizers, fillers, lubricants, pigments, etc.).

[0003] Chinese utility model patent CN212170933U discloses a PVC plastic particle raw material mixing device, which includes "a feeding hopper at the top of the mixing box and a discharge pipe at the bottom of the mixing box, a stirring shaft rotatably connected in the mixing box, and both ends of the stirring shaft being fixedly supported by rolling bearings installed in the inner walls on both sides of the mixing box, multiple stirring rods welded on the stirring shaft, and stirring shovels at the ends of the stirring rods, and a blower set at the top of the mixing box, with an air outlet pipe connected to the blower's outlet"; however, the structure of the stirring blades is relatively simple, the mixing efficiency is low, the adaptability to high viscosity materials is poor, and small lumps are easily formed when liquid plasticizers are added, resulting in uneven mixing and reduced production quality. Utility Model Content

[0004] The purpose of this invention is to provide a PVC plastic particle raw material mixing device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a PVC plastic particle raw material mixing device, comprising four columns, wherein a first support plate, a second support plate, a first support frame, and a second support frame are fixedly installed on the outer walls of the four columns from bottom to top, a second support plate is provided on the right side of the first support plate, and a spraying assembly is provided on the top of the first support plate, a cylinder is fixedly installed on the inner wall of the first support frame, and a top cover is fixedly installed on the top of the cylinder by multiple bolts, wherein a stirring assembly is provided in the middle of the top cover.

[0006] The stirring assembly includes a motor. The bottom of the motor is fixedly installed at the top center of the top cover by bolts. A rotating shaft is fixedly installed at the output end of the motor, and the outer wall of the rotating shaft penetrates the top cover. A scraper, two main blades, a first auxiliary blade and a second auxiliary blade are fixedly installed on the outer wall of the rotating shaft from top to bottom. An elastic rubber strip is provided on the side of the scraper that is in contact with the cylinder.

[0007] The beneficial effects of this utility model are as follows: the device can control the motor and other components through the integrated PLC control cabinet, which drives the two main blades, the first auxiliary blade and the second auxiliary blade on the rotating shaft to quickly and evenly stir the material. The scraper eliminates the dead corners of mixing and avoids material residue. The metering pump atomizes the liquid additive in the liquid addition tank and sprays it out from the spray nozzle along the pipeline, so as to achieve perfect and rapid mixing of the liquid phase and the solid phase, improve the uniformity of mixing, and improve the mixing efficiency and production quality.

[0008] To ensure uniform mixing of liquid additives with materials within the cylinder and prevent clumping:

[0009] The spray assembly is further configured such that: the spray assembly includes a control cabinet, the bottom of which is fixedly mounted on the top of the first support plate; a liquid filling tank is provided on the rear side of the control cabinet, and an inlet pipe is provided on the top of the liquid filling tank; the outlet of the liquid filling tank is fixedly connected to and communicates with the inlet of the metering pump through a pipe; the metering pump is fixedly connected to and communicates with the annular pipe through a delivery pipe; and multiple spray nozzles are provided at equal intervals around the axis at a 45-degree angle on the bottom of the outer wall of the annular pipe.

[0010] By adopting the above technical solution, the control cabinet, which integrates a PLC controller, current sensor and multiple switches, uses a metering pump to draw the liquid additive in the liquid addition tank into the annular pipe along the delivery pipe, and then atomizes it from multiple spray nozzles on the annular pipe and sprays it into the cylinder, so that the liquid phase and solid phase are perfectly and quickly mixed in the cylinder, improving the uniformity of mixing.

[0011] To improve the purity of raw materials entering the cylinder and reduce impurities such as dust in the cylinder:

[0012] The top cover is further configured such that a temperature sensor is provided on the bottom left side, and a feed pipe is provided on the top right side of the top cover. A fan is fixedly installed on the outer wall of the feed pipe by a fixing plate.

[0013] By adopting the above technical solution, the raw material slides inward along the slope of the feed pipe. The feed pipe body has multiple bends, and the pipe opening is equipped with a fan outlet and an inclined baffle. The inclined baffle blocks the lower feed inlet, reducing material dust and volatilization inside the feed pipe. The fan blows the dust outward along the inclined baffle, reducing impurity interference and improving production quality.

[0014] To improve the uniformity of material mixing inside the cylinder and facilitate the entry of the well-mixed material into the next process:

[0015] Further configuration: the bottom discharge pipe of the cylinder is equipped with a pneumatic valve, and one end of the pneumatic valve is fixedly installed on the top of the second support plate; the inner wall of the cylinder adopts a concave-convex slope design.

[0016] By adopting the above technical solution, the material tumbles along the inner wall of the cylinder. The concave and convex sloping structure of the inner wall disrupts the flow trajectory of the material, increases friction and turbulence, and further enhances the shearing effect. The mixed material slides along the bottom slope of the inner wall of the cylinder to the discharge pipe. The pneumatic valve opens, and the mixed material enters the next process, improving the mixing efficiency.

[0017] To achieve rapid dispersing and mixing of materials by the main impeller blades, and to improve the uniformity of material mixing:

[0018] The design further includes: the blades of the two main blades are baffle-type blades, the blade edges are provided with multiple serrated edges, and a first auxiliary blade is provided in the middle of the two main blades.

[0019] By adopting the above technical solution, the main blade of the baffle-type impeller rotates with the rotating shaft, violently throwing the material upward along the cylinder wall to form a strong vortex and vertical convection, avoiding the material from "dead circulation" at the bottom. At the same time, the edges of the multi-segment serrated blades exert a strong tearing and shearing effect on the material clumps, instantly breaking up the agglomerates and allowing the additives to disperse quickly. The first set of blades increases the material agitation and improves the uniformity of material mixing.

[0020] To achieve rapid material agitation driven by the first and second sets of blades, thereby improving material mixing:

[0021] The blades of the first and second auxiliary blades are arranged in a spiral pattern at equal intervals around the axis of rotation.

[0022] By adopting the above technical solution, multiple blades arranged equidistantly in a spiral pattern, including the first and second auxiliary blades, flip the material accumulated in the rotating shaft upwards. This, in conjunction with the main blades, increases the uniformity of material mixing and improves production quality.

[0023] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the main view of this utility model;

[0025] Figure 2 This is a front sectional view of the present invention;

[0026] Figure 3 This is a schematic diagram of the stirring assembly of this utility model;

[0027] Figure 4This is a schematic diagram of the spray assembly of this utility model.

[0028] In the diagram: 1. Column; 2. First support plate; 3. Second support plate; 4. First support frame; 5. Second support frame; 6. Spray assembly; 601. Control cabinet; 602. Liquid filling tank; 603. Metering pump; 604. Circular pipe; 605. Spray nozzle; 7. Cylinder; 8. Top cover; 9. Agitator assembly; 901. Motor; 902. Rotating shaft; 903. Scraper; 904. Main blade; 905. First auxiliary blade; 906. Second auxiliary blade. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0030] Please see Figures 1 to 4 A PVC plastic particle raw material mixing device includes four columns 1. The outer walls of the four columns 1 are fixedly installed from bottom to top with a first support plate 2, a second support plate 3, a first support frame 4 and a second support frame 5. The second support plate 3 is provided on the right side of the first support plate 2, and a spraying assembly 6 is provided on the top of the first support plate 2. A cylinder 7 is fixedly installed on the inner wall of the first support frame 4, and a top cover 8 is fixedly installed on the top of the cylinder 7 by multiple bolts. A stirring assembly 9 is provided in the middle of the top cover 8.

[0031] The stirring assembly 9 includes a motor 901. The bottom of the motor 901 is fixedly installed at the top center of the top cover 8 by bolts. A rotating shaft 902 is fixedly installed at the output end of the motor 901, and the outer wall of the rotating shaft 902 penetrates the top cover 8. A scraper 903, two main blades 904, a first auxiliary blade 905 and a second auxiliary blade 906 are fixedly installed on the outer wall of the rotating shaft 902 from top to bottom. An elastic rubber strip is provided on the side of the scraper 903 that is in contact with the cylinder 7.

[0032] In this embodiment, as Figure 1 , Figure 2 and Figure 4 As shown, the spray assembly 6 includes a control cabinet 601. The bottom of the control cabinet 601 is fixedly installed on the top of the first support plate 2. A liquid filling tank 602 is provided on the rear side of the control cabinet 601, and an inlet pipe is provided on the top of the liquid filling tank 602. The outlet of the liquid filling tank 602 is fixedly connected to and communicates with the inlet of the metering pump 603 through a pipe. The metering pump 603 is fixedly connected to and communicates with the annular pipe 604 through a delivery pipe. Multiple spray nozzles 605 are provided at equal intervals around the axis at a 45-degree angle on the bottom of the outer wall of the annular pipe 604.

[0033] In this embodiment, as Figure 1 and Figure 2As shown, a temperature sensor is provided on the bottom left side of the top cover 8, and a feed pipe is provided on the top right side of the top cover 8. A fan is fixedly installed on the outer wall of the feed pipe by a fixing plate.

[0034] In this embodiment, as Figure 1 and Figure 2 As shown, the bottom discharge pipe of the cylinder 7 is equipped with a pneumatic valve, and one end of the pneumatic valve is fixedly installed on the top of the second support plate 3. The inner wall of the cylinder 7 adopts a concave-convex slope design.

[0035] In this embodiment, as Figure 2 and Figure 3 As shown, the blades of the two main blades 904 are deflector blades with multiple serrated edges, and a first auxiliary blade 905 is provided in the middle of the two main blades 904.

[0036] In this embodiment, as Figure 3 As shown, the blades of the first blade 905 and the second blade 906 are arranged in a spiral pattern at equal intervals around the axis of rotation 902.

[0037] The computer software involved in the hardware carriers such as motors in the technical solution is software technology known to those skilled in the art. It is merely applied to the aforementioned hardware carriers. In other words, the computer software portion of the technical solution is an essential technical feature for solving the aforementioned technical problem, constituting a necessary technical feature for the technical problem solved by this application, but it is not a differentiating technical feature or a point of technical improvement. The applicant has not made any technical improvements to the computer software portion involved in the aforementioned related hardware carriers, nor is it a key technical point of the invention.

[0038] Therefore, the "motor" and "fan" mentioned in this application are physical functional modules that combine existing computer software programs or protocols with the hardware carrier of this application. The computer software programs involved in these physical functional modules are technologies known to those skilled in the art and are not improvements of this application. The improvement of this application should be the interaction between the various physical functional modules, that is, the improvement of the overall structure of the PVC plastic particle raw material mixing device of this application, so as to solve the corresponding technical problems to be solved by this application.

[0039] The working process of this PVC plastic particle raw material mixing device is as follows:

[0040] First, the operator uses a control cabinet 601, which integrates a PLC controller, current sensor, and multiple switches, to electrically control various devices on the equipment, including a motor 901, a fan, a metering pump 603, and multiple pneumatic valves. The pneumatic valve on the feed pipe is opened, and air is supplied through an external air pipe, pouring the raw material into the feed pipe on the top cover 8. The material slides inward along the inclined slope inside the feed pipe. The feed pipe has multiple bends, and the pipe opening is equipped with a fan vent and an inclined baffle. The inclined baffle blocks the lower feed inlet, reducing dust dispersion and volatilization as the material enters the feed pipe. When the raw material passes the fan at the feed pipe opening, the fan blows the dust from the material along... The inclined baffle blows outwards to reduce impurities. Then, the pneumatic valve on the feed pipe is closed. After the material slides into the cylinder 7 through the feed pipe, the motor 901 (model including but not limited to YE3-200L-4-55kW) is started. The motor 901 drives the scraper 903, two main blades 904, the first auxiliary blade 905, and the second auxiliary blade 906 to rotate via the rotating shaft 902. Simultaneously, the control cabinet 601 uses the metering pump 603 to draw the liquid additive from the liquid addition tank 602 along the conveying pipe into the annular pipe 604. The additive is then atomized by multiple spray nozzles 605 on the annular pipe 604 and sprayed into the cylinder 7, achieving liquid-phase mixing within the cylinder 7. The solid phase is perfectly and rapidly mixed. The main impeller 904, employing a baffle-type impeller, rotates with the rotating shaft 902, violently throwing the material upwards along the cylinder wall, forming a strong vortex and vertical convection, preventing the material from "circulating" at the bottom. The multiple serrated blade edges on the main impeller 904 exert a powerful tearing and shearing effect on material clumps, instantly breaking up the agglomerates and rapidly dispersing the additives. At the same time, multiple impellers spirally and equidistantly arranged on the first auxiliary impeller 905 and the second auxiliary impeller 906 turn the material accumulated in the rotating shaft 902 upwards, increasing material agitation. The first auxiliary impeller 905, the second auxiliary impeller 906, and the two main impellers 904 work together to achieve perfect and rapid mixing. The material is stirred and tumbled along the inner wall of the cylinder 7. The concave and convex sloping structure of the inner wall disrupts the flow trajectory of the material, increases friction and turbulence, further enhances the shearing effect, and improves the uniformity of material mixing. Temperature sensors (including but not limited to PT100) provide real-time electrical feedback of the temperature inside the cylinder 7 to the control cabinet 601, adjusting the power of the motor 901 and metering pump 603, or stopping them. The mixed material slides along the bottom slope of the inner wall of the cylinder 7 to the discharge pipe. The pneumatic valve opens, and the mixed material enters the next process. The second support frame 5 is equipped with three pull rings at equal intervals around the axis at 120 degrees, which facilitates the hoisting of the equipment.

[0041] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0042] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of this utility model, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without modification, should all be considered within the protection scope of this utility model.

Claims

1. A PVC plastic particle raw material mixing device comprising four vertical columns (1), characterized in that: The outer walls of the four columns (1) are fixedly installed with a first support plate (2), a second support plate (3), a first support frame (4) and a second support frame (5) from bottom to top. The second support plate (3) is provided on the right side of the first support plate (2), and a spray assembly (6) is provided on the top of the first support plate (2). A cylinder (7) is fixedly installed on the inner wall of the first support frame (4), and a top cover (8) is fixedly installed on the top of the cylinder (7) by multiple bolts. A stirring assembly (9) is provided in the middle of the top cover (8). The stirring assembly (9) includes a motor (901). The bottom of the motor (901) is fixedly installed at the top center of the top cover (8) by bolts. A rotating shaft (902) is fixedly installed at the output end of the motor (901), and the outer wall of the rotating shaft (902) penetrates the top cover (8). A scraper (903), two main blades (904), a first auxiliary blade (905) and a second auxiliary blade (906) are fixedly installed on the outer wall of the rotating shaft (902) from top to bottom. An elastic rubber strip is provided on the side of the scraper (903) that is in contact with the cylinder (7).

2. The PVC plastic particle raw material mixing device according to claim 1, characterized in that: The spray assembly (6) includes a control cabinet (601), the bottom of which is fixedly installed on the top of the first support plate (2). A liquid filling tank (602) is provided on the rear side of the control cabinet (601), and an inlet pipe is provided on the top of the liquid filling tank (602). The outlet of the liquid filling tank (602) is fixedly connected to and communicates with the inlet of the metering pump (603) through a pipe. The metering pump (603) is fixedly connected to and communicates with the annular pipe (604) through a delivery pipe. Multiple spray nozzles (605) are provided at equal intervals around the axis at a 45-degree angle on the bottom of the outer wall of the annular pipe (604).

3. The PVC plastic particle raw material mixing device according to claim 1, characterized in that: A temperature sensor is provided on the bottom left side of the top cover (8), and a feed pipe is provided on the top right side of the top cover (8). A fan is fixedly installed on the outer wall of the feed pipe by a fixing plate.

4. The PVC plastic particle raw material mixing device according to claim 1, characterized in that: The bottom discharge pipe of the cylinder (7) is equipped with a pneumatic valve, and one end of the pneumatic valve is fixedly installed on the top of the second support plate (3). The inner wall of the cylinder (7) adopts a concave-convex slope design.

5. The PVC plastic particle raw material mixing device according to claim 1, characterized in that: The blades of the two main blades (904) are baffle blades with multiple serrated edges, and a first auxiliary blade (905) is provided between the two main blades (904).

6. The PVC plastic particle raw material mixing device according to claim 1, characterized in that: The blades of the first auxiliary blade (905) and the second auxiliary blade (906) are arranged in a spiral pattern at equal intervals around the axis of rotation (902).

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