An additive compounding device containing dimethyltin bisneodecanoate

Abstract

The application discloses a kind of additive mixers containing dimethyl tin didecanate, it is related to chemical additive mixing technical field, including mixing cylinder, bottom wall in mixing cylinder is equipped with bottom support frame, main shaft radial side wall is equipped with stirring piece, the end portion upside wall of stirring piece is fixed with inclined scraper, stirring piece and inclined scraper rotation provide positive and negative mixing power, the end portion of main shaft is fixed with extension rod, extension rod side is equipped with pressing plate, two pressing plates are rotated with extension rod as rotating center, and opposite direction is set, when two pressing plates rotate to the state of mutual parallel, material between two pressing plates is extruded.The application provides closed mixing place, utilizes stirring piece and inclined scraper synchronous positive and negative rotation, repeatedly rotates two pressing plates to the state of mutual parallel, extrudes material between two pressing plates, extruded material is shunted from the side of two pressing plates, changes mixing position, accelerates mixing speed, can also handle machine tin compound generated by mixing.

Description

Technical Field

[0001] This invention relates to the field of chemical additive mixing technology, specifically to an additive mixing device containing dimethyltin dinedecanoate. Background Technology

[0002] Dimethyltin dinecaprate is an important organotin compound with excellent catalytic properties and stability. In the manufacture of polyurethane foams, coatings, adhesives, and sealants, dimethyltin dinecaprate is often used as a highly efficient catalyst, significantly improving the reaction rate and physical properties of the products. Furthermore, it is widely used in the curing process of bimolecular polyurethanes, polyesters, nitrocellulose lacquer, inks, and other coatings and thermosetting coatings, exhibiting good oxidation resistance.

[0003] In chemical production, the mixing process of additives is crucial to the final quality of the product. However, existing additive mixing equipment often suffers from the following shortcomings when handling additives containing organotin compounds such as dimethyltin dinecapate: Uneven mixing: During the mixing process, conventional stirring devices (such as paddle and anchor mixers) in existing mixing equipment are prone to creating "dead zones," leading to localized excessively high or low additive concentrations. This often makes it difficult to achieve uniform mixing of the additive and the base material, resulting in unstable product performance. For example, in polyurethane foam production, uneven mixing of dimethyltin dinecapate can lead to uneven foam density and abnormal shrinkage, directly affecting the product qualification rate. Insufficient safety and environmental protection: Organotin compounds such as dimethyltin dinecapate have certain toxicity or environmental risks. Organotin compounds are bioaccumulative and neurotoxic. Existing equipment lacks closed-loop conveying and waste gas treatment systems, which can easily lead to environmental pollution risks. Summary of the Invention

[0004] The purpose of this invention is to provide an additive mixing apparatus containing dimethyltin dinedecanoate to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an additive mixing device containing dimethyltin dinedecanoate, comprising a mixing cylinder and providing a closed mixing space; The mixing cylinder has a bottom support frame on its inner bottom wall, and a main shaft that can rotate in both directions is provided on the inner bottom wall of the bottom support frame. A stirring blade is provided on the radial side wall of the main shaft, and an inclined scraper is fixed on the upper side wall of the end of the stirring blade. The rotation of the stirring blade and the inclined scraper provides the power for mixing in both directions. An extension rod is fixed to the end of the main shaft, and a pressure plate is provided on the side of the extension rod. There are two pressure plates, which rotate around the extension rod as the rotation center and are arranged in opposite directions. When the two pressure plates rotate to a parallel state, they squeeze the material located between the two pressure plates. At the same time, the squeezed material is diverted from the sides of the two pressure plates, changing the mixing position.

[0006] In a further embodiment, hollow sleeves are fixed to the side walls of the two pressure plates facing the extension rod. The hollow sleeve of one pressure plate is fixedly sleeved on the outer wall of the extension rod, and the two hollow sleeves of the other pressure plate are rotatably sleeved on the outer wall of the extension rod. The hollow sleeves of the two pressure plates are coaxially distributed.

[0007] In a further embodiment, a toothed disc is fixedly sleeved at the bottom end of the extension rod, and a toothed disc is fixedly sleeved on the bottom wall of a pressure plate rotatably sleeved on the outer wall of the extension rod. The toothed disc is engaged with the toothed disc.

[0008] In a further embodiment, a supporting thin rod is fixed at the upper edge of the base frame, an annular frame is fixed at the end of the supporting thin rod, a processing beam is fixed on the inner side wall of the annular frame, and the reinforcing beam is rotatably mounted at the top of the extension rod.

[0009] In a further embodiment, both pressure plates are provided with hollow holes, and multiple horizontally distributed dividing ropes are fixed between the two longitudinal sidewalls inside the hollow holes, with a material leakage gap between two adjacent dividing ropes.

[0010] In a further embodiment, the material leakage gap between two adjacent separating ropes of one pressure plate is smaller than the material leakage gap between two adjacent separating ropes of the other pressure plate.

[0011] In a further embodiment, both pressure plates are provided with hollow holes, and multiple horizontally distributed dividing ropes are fixed between the two longitudinal sidewalls of one of the hollow holes, with a material leakage gap between two adjacent dividing ropes. Another hollow hole has a mesh plate on its inner wall, and the mesh plate has mesh holes distributed in a matrix.

[0012] In a further embodiment, a connecting pipe is also included, which is fixedly installed on the side wall of the upper end face of the mixing cylinder. The bottom end of the connecting pipe passes through the top wall of the mixing cylinder and is flush with the inner top wall of the mixing cylinder. A lifting column is provided inside the connecting pipe. The lifting column is axially adjustable inside the connecting pipe. UV lamp tubes distributed in a ring structure are embedded in the radial side wall of the lifting column.

[0013] In a further embodiment, both ends of the lifting column are provided with external threads, and the connecting pipe is provided with internal threads that match the external threads.

[0014] In a further embodiment, a rubber sleeve is provided at the bottom opening edge of the connecting pipe, and the rubber sleeve is in close sliding contact with the outer wall of the lifting column.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention provides a closed mixing environment for additives containing dimethyltin dinedecanoate. By simultaneously rotating the stirring blade and the inclined scraper in both directions, the two pressure plates are rotated from being in the same plane to being parallel to each other. This rotation adjustment is repeated to compress the material between the two pressure plates. At the same time, the compressed material is diverted from the sides of the two pressure plates, changing the mixing position and accelerating the mixing speed. The closed mixing environment ensures that the organotin compounds generated during mixing do not spill out, and also allows for pollution-free treatment after mixing, avoiding any risk of environmental pollution. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a schematic diagram of the mixing cylinder structure of the present invention; Figure 3 This is a schematic diagram of the mixing component structure of the present invention; Figure 4 This is a partial cross-sectional view of the mixing component structure of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of the structure at point A in the middle; Figure 6 For the present invention Figure 4 Enlarged view of the structure at point B in the middle; Figure 7 This is a schematic diagram illustrating the flipping and adjustment of the two pressure plates of the present invention; Figure 8 This is a schematic diagram of a further improved structure of the two pressure plates of the present invention; Figure 9 This is a schematic diagram of another improved structure of the two pressure plates of the present invention; Figure 10 This is a schematic diagram of the lifting column structure of the present invention; Figure 11 This is a half-sectional view of the butt joint pipe of the present invention. Figure 12 This is a cross-sectional view of the lifting column structure of the present invention.

[0017] In the diagram: 1. Mixing cylinder; 11. Connecting pipe; 12. Rubber sleeve; 2. Lifting column; 21. UV lamp tube; 3. Base support frame; 31. Main shaft; 32. Mixing blade; 321. Inclined scraper; 33. Pressure plate; 34. Annular frame; 35. Processing beam; 36. Extension rod; 37. Hollow sleeve; 38. Gear disc two; 39. Gear disc one; 310. Separating rope; 311. Mesh plate. Detailed Implementation

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] This embodiment provides a mixing device for an additive containing dimethyltin dinedecanoate, including a mixing cylinder 1 providing a closed mixing space. Figure 1 As shown, the mixing cylinder 1 has a feed inlet at its upper end, and a sealing valve is rotatably installed inside the feed inlet. A rotating handle extends from the side wall of the discharge outlet. Rotating the handle causes the sealing valve to open and close within the feed inlet. When open, it facilitates the feeding of the materials to be mixed into the mixing cylinder 1; when closed, it ensures that the mixing cylinder 1 is temporarily in a sealed space, providing a closed environment for mixing. It also includes a support frame, such as... Figure 1 and Figure 2 As shown, the support frame has a rotating shaft that is rotatably mounted on the outer wall of the mixing cylinder 1. A servo motor is also mounted on the support frame. Multiple belts are wound around the output end of the servo motor and one of the rotating shaft supports as the power transmission medium. The belts are kept under constant tension between the output end and the rotating shaft to ensure effective power transmission. During the loading and mixing process, the servo motor is stopped, and the feed inlet faces upwards. Once mixing is complete, the servo motor is activated to provide the rotational power for the mixing cylinder 1, tilting the feed inlet downwards. The servo motor then stops, opening the sealing valve, and the mixed material pours out from the feed inlet. It is important to note that an electromagnetic brake is installed on the motor shaft of the servo motor. When the electromagnet is energized, the brake opens, allowing the motor shaft to rotate freely; when the power is off, the electromagnetic brake, under the action of a spring, clamps the motor shaft, causing the motor to stop quickly. This brake is used to lock the rotor when the motor stops, thus preventing the mixing cylinder 1 from continuing to rotate.

[0020] At the same time, such as Figure 3 and Figure 4As shown, the bottom wall of the mixing cylinder 1 is provided with a bottom support frame 3, and the bottom wall of the bottom support frame 3 is provided with a main shaft 31 capable of rotating in both directions. A servo motor is also installed on the bottom wall of the mixing cylinder 1. The output end of the servo motor rotates through the bottom wall of the mixing cylinder 1 and the bottom wall of the bottom support frame 3, and is connected to the main shaft 31, providing forward and reverse rotation power for the main shaft 31. The radial side wall of the main shaft 31 is provided with a stirring blade 32, and the upper side wall of the end of the stirring blade 32 is fixedly provided with an inclined scraper 321. The bottom wall of the stirring blade 32 rotates in contact with the inner bottom wall of the bottom support frame 3, and the inclined scraper 321 rotates in contact with the inner side wall of the bottom support frame 3. The preset single rotation angle of the servo motor is from 0° to 180°, and then from 180° back to 0°. In this way, when the main shaft 31 is driven to rotate in both directions by the servo motor, the stirring blade 32 and the inclined scraper 321 rotate to provide forward and reverse mixing power, mixing and stirring the material (containing dimethyltin dinedecanoate additive) in the mixing cylinder 1.

[0021] like Figure 4 , Figure 5 and Figure 6 As shown, an extension rod 36 is fixed to the end of the main shaft 31. Two pressure plates 33 are provided on the sides of the extension rod 36. Specifically, each pressure plate 33 has a hollow sleeve 37 fixed to its sidewall facing the extension rod 36. One pressure plate 33 has its hollow sleeve 37 fixedly fitted onto the outer wall of the extension rod 36, while the other pressure plate 33 has its two hollow sleeves 37 rotatably fitted onto the outer wall of the extension rod 36. The hollow sleeves 37 of the two pressure plates 33 are coaxially distributed. A geared disc 39 is fixedly fitted to the bottom end of the extension rod 36. A geared disc 38 is fixedly fitted to the bottom wall of one of the pressure plates 33 rotatably fitted onto the outer wall of the extension rod 36. The geared disc 38 meshes with the geared disc 39. When the main shaft 31 rotates, the extension rod 36 rotates synchronously. The two hollow sleeves 37, fixedly fitted to the extension rod 36, rotate synchronously with the extension rod 36. Therefore, the rotation direction of one pressure plate 33 is the same as that of the gear disc 39. However, the two hollow sleeves 37, which are rotated and fitted to the extension rod 36, do not rotate synchronously with the extension rod 36. Since the gear disc 39 rotates synchronously with the extension rod 36, it can drive the gear disc 38 to rotate in the opposite direction. Thus, the rotation direction of the other pressure plate 33 is the same as that of the gear disc 38. In this way, the rotation directions of the two pressure plates 33 are adjusted in opposite directions. Therefore, as long as the main shaft 31 rotates, the two pressure plates 33 rotate around the extension rod 36 as the center of rotation, and in opposite directions.

[0022] The two pressure plates 33 are arranged as follows Figure 7Rotating in the directions indicated by the two arrows rotates the two pressure plates 33 to a parallel state, meaning the two pressure plates 33 eventually rotate and come into contact with each other. During this process, the material located between the two pressure plates 33 is squeezed and dispersed. At the same time, the squeezed material is diverted from the sides of the two pressure plates 33, increasing the mixing efficiency. Subsequently, the main shaft 31 rotates in the opposite direction, separating the two pressure plates 33 from their contact state. As the two pressure plates 33 rotate in the opposite direction, their other sidewalls eventually rotate and come into contact with each other, squeezing the material located between the two pressure plates 33 again, dispersing the material. At the same time, the squeezed material is diverted from the sides of the two pressure plates 33, and the material peristalsis manifests as overflowing outwards along the edges of the pressure plates 33. By changing the mixing position and repeatedly changing the rotation direction of the main shaft 31, the material is squeezed and dispersed and overflows between the two pressure plates 33 in both forward and reverse compression, maximizing the variation of the material's mixing position and increasing the efficiency of thorough mixing.

[0023] To enhance the stability of the pressure plate 33's rotational adjustment, a thin support rod is fixed to the upper edge of the base frame 3. An annular frame 34 is fixed to the end of the support rod, and a processing beam 35 is fixed to the inner wall of the annular frame 34. The reinforcing beam is rotatably positioned at the top of the extension rod 36. The outer wall of the annular frame 34 contacts the inner wall of the mixing cylinder 1, forming a reinforcing frame on the outer side of the top of the pressure plate 33, thus enhancing the rotational and overturning stability of the pressure plate 33. In addition to the above-mentioned design, the structure of the pressure plate 33 includes, for example... Figure 8 As shown, hollow holes can also be provided in both pressure plates 33. Multiple horizontally distributed dividing ropes 310 are fixed between the two longitudinal sidewalls of the hollow holes, and a material leakage gap is provided between adjacent dividing ropes 310. The material leakage gap between adjacent dividing ropes 310 of one pressure plate 33 is smaller than that of the other pressure plate 33. The two pressure plates 33 are also arranged as shown... Figure 7 Rotating in the directions indicated by the two arrows will rotate the two pressure plates 33 to a parallel state, meaning the two pressure plates 33 will eventually rotate and come into contact with each other. During this process, the material can pass through the leakage gaps of the two pressure plates 33. Since the leakage gap between two adjacent separating ropes 310 of one pressure plate 33 is smaller than that between two adjacent separating ropes 310 of the other pressure plate 33, different leakage gaps can be used to classify and screen material particles of different sizes. For example, the large-gap pressure plate 33 allows coarse particles to pass through, while the small-gap pressure plate 33 traps fine particles, achieving a combination effect of "coarse screening + fine screening" and accelerating the thorough mixing of the material.

[0024] Another design of the pressure plate 33 is that both pressure plates 33 have hollow holes. In one hollow hole, multiple horizontally distributed separating ropes 310 are fixed between the two longitudinal sidewalls, with a material leakage gap between adjacent separating ropes 310. The inner sidewall of the other hollow hole is provided with a mesh plate 311, and the mesh plate 311 has a matrix-distributed mesh of holes. For example... Figure 9 As shown, dimethyltin dinecaprate, an organic compound, serves as a highly efficient catalyst in the manufacture of polyurethane foams, coatings, adhesives, and sealants. Its mixtures may contain particles of various shapes and sizes. The material leakage gap in the separator rope 310 design is a linear slit, accommodating materials of different shapes, including fibrous or flaky particles, reducing the risk of clogging and ensuring smooth flow of the additive mixture. The grid holes on the mesh sheet 311 are matrix-distributed with fixed dimensions, enabling high-precision sieving. For highly efficient catalysts like dimethyltin dinecaprate, precise particle size control is crucial for ensuring product performance and quality. The mesh sheet 311 design ensures uniform particle size in the additive mixture, improving product stability and consistency.

[0025] During the additive mixing process, organotin compounds such as dimethyltin dinedecanoate are generated, which pose certain toxicity or environmental risks. Therefore, during the mixing process, the inlet valve should be closed to keep the mixing cylinder 1 in a sealed state to prevent the leakage of harmful substances. In addition, if... Figure 10 , Figure 11 and Figure 12 As shown, the mixing cylinder 1 also includes a connecting pipe 11 fixedly installed on the side wall of the upper end face of the mixing cylinder 1. The bottom end of the connecting pipe 11 passes through the top wall of the mixing cylinder 1 and is flush with the inner top wall of the mixing cylinder 1. A lifting column 2 is provided inside the connecting pipe 11. The lifting column 2 is axially adjustable inside the connecting pipe 11. UV lamps 21 with a ring-shaped structure are embedded in the radial side wall of the lifting column 2. Both ends of the lifting column 2 have external threads, and the connecting pipe 11 has internal threads that match the external threads. After mixing, the lifting column 2 is lowered along the axial direction of the connecting pipe 11, and finally the lower external thread is threaded to the internal thread of the connecting pipe 11, which allows the UV lamps 21 to be placed inside the mixing cylinder 1. Here, the UV lamps 21 are dual-wavelength UV lamps with wavelengths of 185nm and 254nm. The 185nm wavelength is used to break down organic molecular chains, and the 254nm wavelength is used to excite oxygen molecules to produce ozone. At the same time, a TiO2 photocatalyst coating is set around the UV lamps 21 to enhance the oxidation reaction efficiency.

[0026] Specifically, UV light beams directly act on organotin compound molecules, breaking their chemical bonds and generating small molecular fragments. For example, dibutyltin is broken down into smaller molecules such as C2H4 and CH4. Active oxygen generation: UV light decomposes oxygen in the air to generate free oxygen, which combines with ozone to form O3. Synergistic oxidation: O3 and free oxygen react with organotin fragments to produce carbon dioxide, water, and inorganic tin salts (such as SnO2). UV photolysis, through the synergistic effect of high-energy UV light beams and ozone, can efficiently decompose and oxidize organotin compounds, making it suitable for treating low- to medium-concentration organotin-containing waste gas. By optimizing waste gas collection, UV photolysis reactions, and tail gas emissions, the treatment effect can be ensured to meet emission standards.

[0027] To prevent material from adhering to the outer wall of the lifting column 2, a rubber sleeve 12 is provided at the bottom opening edge of the connecting pipe 11. The rubber sleeve 12 slides tightly in contact with the outer wall of the lifting column 2. In this way, when the lifting column 2 is pulled upward, the inner side wall of the end of the rubber sleeve 12 scrapes against the outer wall of the lifting column 2, effectively scraping away the adhering material. This prevents a large amount of material from entering the connecting pipe 11.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An additive compounding device containing dimethyltin bisneodecanoate, characterized in that, include: Mixing cylinder (1) provides a closed mixing space; The mixing cylinder (1) has a bottom support frame (3) on its inner bottom wall. The bottom support frame (3) has a main shaft (31) that can rotate in both directions. The main shaft (31) has a stirring blade (32) on its radial side wall. The upper side wall of the end of the stirring blade (32) is fixed with an inclined scraper (321). The stirring blade (32) and the inclined scraper (321) rotate to provide forward and reverse mixing power. An extension rod (36) is fixed at the end of the main shaft (31). A pressure plate (33) is provided on the side of the extension rod (36). There are two pressure plates (33). The two pressure plates (33) rotate around the extension rod (36) as the rotation center and are arranged in opposite directions. When the two pressure plates (33) rotate to a parallel state, they squeeze the material between the two pressure plates (33), and at the same time, the squeezed material is diverted from the sides of the two pressure plates (33) to change the mixing position. Hollow sleeves (37) are fixed on the side walls of the two pressure plates (33) facing the extension rod (36). The hollow sleeve (37) of one pressure plate (33) is fixedly sleeved on the outer wall of the extension rod (36), and the hollow sleeve (37) of the other pressure plate (33) is rotatably sleeved on the outer wall of the extension rod (36). The hollow sleeves (37) of the two pressure plates (33) are coaxially distributed. The bottom end of the extension rod (36) is fixedly fitted with a toothed disc (39), and a pressure plate (33) rotatably fitted on the outer wall of the extension rod (36) is fixedly fitted with a toothed disc (38) on its bottom wall. The toothed disc (38) meshes with the toothed disc (39). A support rod is fixed at the upper edge of the bottom support frame (3), and an annular frame (34) is fixed at the end of the support rod. A processing beam (35) is fixed on the inner side wall of the annular frame (34), and the processing beam (35) is rotatably mounted on the top of the extension rod (36).

2. The additive mixing apparatus containing dimethyltin dinedecanoate according to claim 1, characterized in that, Both pressure plates (33) have hollow holes. Multiple horizontally distributed dividing ropes (310) are fixed between the two longitudinal sidewalls inside the hollow holes, and a material leakage gap is provided between two adjacent dividing ropes (310).

3. The additive mixing device containing dimethyltin dinedecanoate according to claim 2, characterized in that, The material leakage gap between two adjacent separating ropes (310) of one of the pressure plates (33) is smaller than the material leakage gap between two adjacent separating ropes (310) of the other pressure plate (33).

4. The additive mixing device containing dimethyltin dinedecanoate according to claim 1, characterized in that, Both pressure plates (33) have hollow holes. In one of the hollow holes, there are multiple horizontally distributed dividing ropes (310) fixed between the two longitudinal sidewalls. There is a material leakage gap between two adjacent dividing ropes (310). Another hollow hole has a mesh plate (311) on its inner wall, and the mesh plate (311) has mesh holes distributed in a matrix.

5. The additive mixing apparatus containing dimethyltin dinedecanoate according to any one of claims 1-4, characterized in that, It also includes a connecting pipe (11) fixedly installed on the side wall of the upper end face of the mixing cylinder (1). The bottom end of the connecting pipe (11) passes through the top wall of the mixing cylinder (1) and is flush with the inner top wall of the mixing cylinder (1). A lifting column (2) is provided inside the connecting pipe (11). The lifting column (2) is adjustable in the axial direction inside the connecting pipe (11). UV lamp tubes (21) with a ring structure are embedded in the radial side wall of the lifting column (2).

6. The additive mixing apparatus containing dimethyltin dinedecanoate according to claim 5, characterized in that, The lifting column (2) has external threads at both ends of its axial direction, and the connecting pipe (11) has internal threads that match the external threads.

7. The additive mixing apparatus containing dimethyltin dinedecanoate according to claim 6, characterized in that, The bottom opening edge of the connecting pipe (11) is provided with a rubber sleeve (12), and the rubber sleeve (12) is in close sliding contact with the outer wall of the lifting column (2).

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