Biodegradable film preparation proportioning apparatus

Abstract

The utility model relates to the technical field of proportioning, disclose a proportioning equipment is used in biodegradable film preparation, including a pair of stand, fixedly installed between the stand have lower crossbeam and upper crossbeam, the lower crossbeam is installed with storage tank through the connecting component, the side top intercommunication of storage tank away from connecting component is installed with feed pipe, the downside of storage tank is connected and is installed with measuring valve, the top of storage tank is fixedly installed with worm reducer, the output of worm reducer stretches into storage tank and is installed with stirring paddle, the upside of upper crossbeam is fixedly installed with electric screw rod module, the slide platform upside of electric screw rod module is installed with the power component for driving worm reducer. The utility model discloses a set of movable power component on electric screw rod module can be docked with the worm reducer of different positions, can rotate the corresponding stirring paddle and mix and stir before putting in the additive, then is put through the measuring valve, avoids the uneven distribution problem caused by additive stratification, agglomeration.

Description

Technical Field

[0001] This utility model relates to the field of proportioning technology, specifically to proportioning equipment for preparing biodegradable membranes. Background Technology

[0002] The preparation process of biodegradable membranes typically includes steps such as raw material selection, modification treatment, proportioning and mixing, molding and processing, and post-treatment. Among these, proportioning and mixing is a crucial step, as it directly affects the membrane's performance, quality, and final application effect, such as tensile strength, air permeability, and degradation rate.

[0003] When preparing biodegradable membranes such as polylactic acid (PLA) and polybutylene adipate / terephthalate (PBAT), PLA and PBAT are often added to a horizontal mixer in a certain proportion along with other additives (such as plasticizers, reinforcing agents, water-resistant agents, crosslinking agents, etc.) and stirred evenly before being used in subsequent extrusion granulation and blown film forming.

[0004] There are many types of additives, which are currently stored separately in storage tanks and the dosage is precisely controlled by metering valves. In actual use, the following situations can easily occur when they are left to stand: First, due to the differences in the physicochemical properties of different additives, such as density, molecular structure, and solubility, the additives are prone to stratification due to gravity and intermolecular forces. Second, some additives may have a tendency to agglomerate, and the additive molecules may aggregate to form large particle clusters. These situations can lead to uneven additive concentrations, which will seriously affect the accuracy of the additive dosage and thus adversely affect the mixing process of biodegradable membranes, reducing the yield and application effect of biodegradable membranes.

[0005] Therefore, in order to solve the above problems, a mixing equipment for preparing biodegradable membranes is proposed. Utility Model Content

[0006] The purpose of this invention is to provide a mixing device for preparing biodegradable membranes, which can mix and add various additives before adding them using a single power unit, thereby solving the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a proportioning device for preparing biodegradable membranes, comprising a pair of uprights, with a lower crossbeam and an upper crossbeam fixedly installed between the uprights. A storage tank is mounted on the lower crossbeam via a connecting assembly. A feed pipe is connected to the top of the storage tank on the side away from the connecting assembly. A metering valve is connected to the lower side of the storage tank. A worm gear reducer is fixedly installed on the top of the storage tank. The output end of the worm gear reducer extends into the storage tank and is fitted with a stirring paddle. An electric lead screw module is fixedly installed on the upper side of the upper crossbeam. A power assembly for driving the worm gear reducer is installed on the upper side of the slide of the electric lead screw module.

[0008] Specifically, the power assembly includes an electric cylinder and a geared motor. The geared motor is fixedly installed on the upper side of the slide of the electric lead screw module. The output end of the geared motor has a first spline, and the input end of the worm gear reducer has a second spline. The electric cylinder is fixedly installed on the upper side of the geared motor. The push rod end of the electric cylinder is rotatably mounted with a spline sleeve through a bearing seat. The spline sleeve is fitted onto the first spline.

[0009] Furthermore, the length of the first spline is greater than the length of the spline sleeve.

[0010] Furthermore, a position sensor is fixedly installed on the slide side wall of the electric lead screw module, and a reference block is fixedly installed on the side of the storage tank near the electric lead screw module.

[0011] Specifically, the connecting assembly includes a U-shaped connecting plate and a base plate. The U-shaped connecting plate is fixedly installed on the side of the storage tank near the electric screw module by a reinforcing rib. The base plate is installed on the lower side of the U-shaped connecting plate by a bolt group. The lower crossbeam is clamped between the U-shaped connecting plate and the base plate.

[0012] Specifically, the stirring paddle includes a central shaft and blades. The output end of the worm gear reducer is connected to the central shaft via a coupling. Two pairs of blades, arranged vertically and vertically, are fixedly mounted on the central shaft. Spiral blades are fixedly mounted between the vertically and vertically staggered blades.

[0013] Furthermore, the two blades in each pair are of equal length and tilt in opposite directions, with the length of the lower pair of blades being less than the length of the upper pair of blades.

[0014] Compared with the prior art, the beneficial effects of this utility model are: A movable power unit on the electric lead screw module can be connected to worm gear reducers at different positions. Before adding additives, the corresponding stirring paddle can be rotated to mix and stir, and then the additives are added through the metering valve, avoiding uneven distribution caused by additive stratification and agglomeration. Attached Figure Description

[0015] Figure 1 This is a schematic front view of the structure of this utility model; Figure 2 This is a schematic cross-sectional view of the internal structure of the storage tank of this utility model; Figure 3 for Figure 1 Schematic partial cross-section of the structure along the AA direction; Figure 4 This is an enlarged schematic diagram of the structure of the power component of this utility model; Figure 5 This is an enlarged schematic diagram of the structure of the position sensor of this utility model; Figure 6 This is an enlarged view of the structural schematic of the connecting component of this utility model.

[0016] In the diagram: 1. Frame, 2. Connecting assembly, 21. Z-shaped connecting plate, 22. Base plate, 3. Lower crossbeam, 4. Upper crossbeam, 5. Electric lead screw module, 6. Power assembly, 61. Second spline, 62. Spline sleeve, 63. First spline, 64. Electric cylinder, 65. Gear motor, 7. Worm gear reducer, 8. Feed pipe, 9. Agitator, 91. Central shaft, 92. Blade, 10. Storage tank, 11. Metering valve, 12. Reference block, 13. Position sensor. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1 and Figure 3 This utility model provides a proportioning device for preparing biodegradable membranes, including a pair of uprights 1. The uprights 1 are vertically arranged and can be fixedly installed on the ground by expansion screws. A lower crossbeam 3 and an upper crossbeam 4 are fixedly installed between the uprights 1. The upper crossbeam 4 is located above the lower crossbeam 3. The uprights 1, the upper crossbeam 4 and the lower crossbeam 3 form a supporting foundation.

[0019] The lower crossbeam 3 is equipped with storage tanks 10 via connecting components 2. The number of storage tanks 10 can be selected according to the type of additive. When the storage tanks 10 are installed on the lower crossbeam 3 via connecting components 2, they are tightly pressed against each other and are easy to disassemble. The top of the side of the storage tank 10 away from the connecting components 2 is connected to a feed pipe 8. The feed pipe 8 consists of a pipe body and a rubber cap. The pipe body is installed at an angle on the storage tank 10 for adding additives, while the rubber cap is used to seal the pipe body. A metering valve 11 is connected to the lower side of the storage tank 10 for controlling the amount of additive added.

[0020] A worm gear reducer 7 is fixedly installed on the top of the storage tank 10. The worm gear reducer 7 includes a worm and a worm wheel structure and has the ability to brake in reverse. The output end of the worm gear reducer 7 extends into the storage tank 10 and is equipped with an agitator 9. An electric screw module 5 is fixedly installed on the upper side of the upper crossbeam 4. A power component 6 for driving the worm gear reducer 7 is installed on the upper side of the slide of the electric screw module 5. The electric screw module 5 can move the power component 6 back and forth, so that the power component 6 provides power to the worm gear reducer 7 respectively, thereby rotating the corresponding agitator 9.

[0021] Please see Figure 4 The power assembly 6 includes an electric cylinder 64 and a geared motor 65. The geared motor 65 is fixedly installed on the upper side of the slide of the electric lead screw module 5. The output end of the geared motor 65 is provided with a first spline 63, and the input end of the worm gear reducer 7 is provided with a second spline 61. The first spline 63 and the second spline 61 have the same cross-sectional shape. The electric cylinder 64 is fixedly installed on the upper side of the geared motor 65. The push rod end of the electric cylinder 64 is rotatably mounted with a spline sleeve 62 through a bearing seat. The spline sleeve 62 is fitted on the first spline 63.

[0022] The electric lead screw module 5 can horizontally reciprocate the reduction motor 65, aligning the first spline 63 with the second spline 61 on each worm gear reducer 7. The extension and retraction of the electric cylinder 64 can drive the spline sleeve 62 to move axially back and forth on the first spline 63. When extended, the spline sleeve 62 is simultaneously fitted on the aligned second spline 61 and first spline 63, and can rotate on the bearing seat to transmit torque. When retracted, the spline sleeve 62 is completely located on the first spline 63, separating the second spline 61 and the first spline 63.

[0023] The length of the first spline 63 is greater than the length of the spline sleeve 62, so as to ensure that the spline sleeve 62 can be completely located inside the first spline 63 when the electric cylinder 64 retracts, so as not to affect the translational movement of the first spline 63 after separation.

[0024] Please see Figure 5 A position sensor 13 is fixedly installed on the slide side wall of the electric screw module 5. A reference block 12 is fixedly installed on the side of the storage tank 10 near the electric screw module 5. The position sensor 13 can be an inductive position sensor. The corresponding reference block 12 is made of metal. When the position sensor 13 is aligned with each reference block 12, the second spline 61 and the first spline 63 are also aligned accordingly.

[0025] The geared motor 65 is a servo motor with an encoder, which can accurately rotate the first spline 63 a certain number of turns, ensuring that the first spline 63 can be aligned with the second spline 61 when it stops, and preventing the spline sleeve 62 from jamming when connecting the second spline 61 and the first spline 63.

[0026] Please see Figure 6 The connecting component 2 includes a U-shaped connecting plate 21 and a base plate 22. The U-shaped connecting plate 21 is fixedly installed on the side of the storage tank 10 near the electric screw module 5 by a reinforcing rib. The base plate 22 is installed on the lower side of the U-shaped connecting plate 21 by a bolt group. The lower crossbeam 3 is clamped between the U-shaped connecting plate 21 and the base plate 22.

[0027] The lower crossbeam 3 is made of square steel with a rectangular cross-section. The Z-shaped connecting plate 21 is installed on the lower crossbeam 3 from top to bottom and is connected and locked through the base plate 22. It has the ability to position and keep the storage tank 10 vertical. The bolt group connection method also makes disassembly more convenient.

[0028] Please see Figure 2 The stirring paddle 9 includes a central shaft 91 and blades 92. The output end of the worm gear reducer 7 is connected to the central shaft 91 via a coupling. Two pairs of blades 92 are fixedly mounted on the central shaft 91, which are arranged vertically. Spiral blades 93 are fixedly mounted between the blades 92, which are staggered vertically (between the upper left and lower right, and between the upper right and lower left). When the worm gear reducer 7 is driven, it can drive the blades 92 and spiral blades 93 to rotate via the central shaft 91, thereby completing the stirring of the additive.

[0029] In each pair, the two blades 92 are of equal length and tilt in opposite directions (one tilts forward and the other tilts backward). The length of the lower pair of blades 92 is less than that of the upper pair of blades 92. Correspondingly, the two spiral blades 93 are also wider at the top and narrower at the bottom. This structure allows the worm gear reducer 7 to drive the rotation of each component better and has a better turbulence effect, which is conducive to improving the mixing efficiency.

[0030] Working principle: The electric lead screw module 5, electric cylinder 64, geared motor 65, and position sensor 13 are electrically connected to the external control box. The external control box serves as the control core of the entire proportioning equipment. It integrates a programmable logic controller (PLC) or other types of control chips, and has functions such as data processing, logic judgment, and instruction output.

[0031] Preparation phase: Depending on the type of additive, an appropriate number of storage tanks 10 are used and installed on the lower crossbeam 3 by connecting components 2. Various additives are put into the storage tanks 10 through the feed pipe 8 for storage.

[0032] Work phase: Power switching: When the corresponding additive is used, the electric screw module 5 moves the power component 6 to the position sensor 13 to align with the matching reference block 12. At this time, the second spline 61 and the first spline 63 are aligned. Then the electric cylinder 64 extends the spline sleeve 62 and moves it from the first spline 63 to the aligned second spline 61 and the first spline 63 to complete the docking. Add by mixing: When the geared motor 65 is working, it can rotate the stirring paddle 9 through the worm gear reducer 7 to mix and stir the additive. After stirring for 1 to 3 minutes, it stops and then the additive is discharged quantitatively through the metering valve 11. After completion, the electric cylinder 64 drives the spline sleeve 62 to reset and separate the first spline 63 and the second spline 61.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A mixing device for preparing biodegradable membranes, characterized in that: The device includes a pair of uprights (1), with a lower crossbeam (3) and an upper crossbeam (4) fixedly installed between the uprights (1). A storage tank (10) is installed on the lower crossbeam (3) via a connecting assembly (2). A feed pipe (8) is connected to the top of the storage tank (10) on the side away from the connecting assembly (2). A metering valve (11) is connected to the lower side of the storage tank (10). A worm gear reducer (7) is fixedly installed on the top of the storage tank (10). The output end of the worm gear reducer (7) extends into the storage tank (10) and is fitted with a stirring paddle (9). An electric screw module (5) is fixedly installed on the upper side of the upper crossbeam (4). A power assembly (6) for driving the worm gear reducer (7) is installed on the upper side of the slide of the electric screw module (5).

2. The proportioning equipment for preparing biodegradable membranes according to claim 1, characterized in that: The power assembly (6) includes an electric cylinder (64) and a geared motor (65). The geared motor (65) is fixedly installed on the upper side of the slide of the electric screw module (5). The output end of the geared motor (65) is provided with a first spline (63). The input end of the worm gear reducer (7) is provided with a second spline (61). The electric cylinder (64) is fixedly installed on the upper side of the geared motor (65). The push rod end of the electric cylinder (64) is rotatably mounted with a spline sleeve (62) through a bearing seat. The spline sleeve (62) is sleeved on the first spline (63).

3. The proportioning equipment for preparing biodegradable membranes according to claim 2, characterized in that: The length of the first spline (63) is greater than the length of the spline sleeve (62).

4. The proportioning equipment for preparing biodegradable membranes according to claim 2, characterized in that: A position sensor (13) is fixedly installed on the slide side wall of the electric screw module (5), and a reference block (12) is fixedly installed on the side of the storage tank (10) near the electric screw module (5).

5. The proportioning equipment for preparing biodegradable membranes according to claim 1, characterized in that: The connecting assembly (2) includes a U-shaped connecting plate (21) and a base plate (22). The storage tank (10) is fixedly installed with the U-shaped connecting plate (21) on the side near the electric screw module (5) by a reinforcing rib. The base plate (22) is installed on the lower side of the U-shaped connecting plate (21) by a bolt group. The lower crossbeam (3) is clamped between the U-shaped connecting plate (21) and the base plate (22).

6. The proportioning equipment for preparing biodegradable membranes according to claim 1, characterized in that: The stirring paddle (9) includes a central shaft (91) and blades (92). The output end of the worm gear reducer (7) is connected to the central shaft (91) via a coupling. The central shaft (91) is fixedly mounted with two pairs of blades (92) distributed vertically. Spiral blades (93) are fixedly mounted between the blades (92) which are staggered vertically.

7. The proportioning equipment for preparing biodegradable membranes according to claim 6, characterized in that: The two blades (92) in each pair are of equal length and tilt in opposite directions, with the length of the lower pair of blades (92) being less than the length of the upper pair of blades (92).

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