Polyurethane foam preparation mechanism

Abstract

The utility model provides a polyurethane foam preparation mechanism which comprises a reaction kettle body and a kettle cover, the kettle cover is arranged on the top of the reaction kettle body in a covering mode, and a fixing frame is fixedly installed on the top of the kettle cover. A metering pump is started, a chemical agent in a chemical agent cylinder is extracted, conveyed to each spray head through a liquid discharging pipe and sprayed downwards into the reaction kettle body, the distribution area of the chemical agent is increased, meanwhile, a servo motor is started, and a cylinder is driven to rotate through the meshing relation between a driving wheel and a gear ring; meanwhile, the four liquid discharging pipes are driven to do circular motion in the reaction kettle body, and the multiple nozzles at the bottoms of the liquid discharging pipes can do circular motion in the reaction kettle body along with rotation of the cylinder and spray chemical agents, so that the chemical agent adding uniformity rate in the polyurethane foam preparation process is effectively increased, the uniform mixing time is saved, and the production efficiency is improved. The reaction efficiency is improved.

Description

Technical Field

[0001] This utility model relates to a polyurethane foam preparation mechanism, belonging to the field of polyurethane foam preparation equipment. Background Technology

[0002] Polyurethane foam is a porous polyurethane material composed of numerous micropores and the network of polyurethane resin pore walls. During the preparation process, the raw materials need to be transported to the reaction vessel, and chemical agents such as isocyanate and polyol are transported by metering pumps. After stirring and mixing, the foaming effect is achieved.

[0003] In the existing technology, the chemical agents used in the polyurethane foam preparation process need to use a separate delivery channel and cannot share the same delivery pipeline with the polyurethane foam raw materials. The chemical agent delivery pipeline is fixedly installed on the top of the polyurethane foam preparation vessel. After the chemical agent is added at a fixed point, the agitator inside the reaction vessel needs to stir for a long time to complete the full mixing reaction, thereby prolonging the mixing time of polyurethane foam preparation and reducing the reaction efficiency.

[0004] In summary, this utility model provides a polyurethane foam preparation mechanism to solve the above problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a polyurethane foam preparation mechanism to solve the problem mentioned in the background art, which is that the fixed-point addition of chemical agents during polyurethane foam preparation leads to an increase in the required mixing and stirring time, thus reducing the reaction efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a polyurethane foam preparation mechanism, comprising a reaction vessel body and a vessel cover, wherein the vessel cover is disposed on the top of the reaction vessel body, a fixing frame is fixedly installed on the top of the vessel cover, a turntable is passed through the top of the fixing frame, a motor is fixedly installed on one side of the top of the vessel cover and inside the fixing frame, a drive shaft is fixedly installed at the output end of the motor, a drive wheel is fixedly installed at the end of the drive shaft, a reagent delivery assembly is passed through the top of the turntable, and the bottom of the reagent delivery assembly passes through the top of the vessel cover and extends into the interior of the reaction vessel body.

[0007] Furthermore, the turntable is rotatably connected to the fixed frame via bearings, and the fixed frame has an open front and a closed back.

[0008] Furthermore, the reagent delivery assembly includes a cylinder and four reagent cylinders. The cylinder extends through the top of the vessel lid, and the four reagent cylinders are evenly distributed around the center of the turntable and extend through the four sides of the top of the turntable. The bottom of each of the four reagent cylinders is connected to a metering pump via a pipe. The outlet of each of the four metering pumps is connected to a drain pipe. One end of each of the four drain pipes gradually extends through the four sides of the cylinder and the four sides of the inner wall of the cylinder and extends into the interior of the reactor body. The bottom of each of the four drain pipes is evenly connected to multiple nozzles from left to right. A circular plate is fixedly fitted on the outside of the cylinder and directly above the vessel lid. A toothed ring is fixedly fitted on the outside of the circular plate and at the bottom of the drive wheel.

[0009] Furthermore, the gear ring meshes with the drive wheel, and each of the four drug cartridges is equipped with a sealing cap at the top.

[0010] Furthermore, the cylinder is rotatably connected to the vessel lid via bearings, and the ends of the four drain pipes away from the metering pump are all sealed.

[0011] Furthermore, all four drain pipes are fixedly connected to the cylinder, and the center of the cylinder and the center of the turntable are located on the same longitudinal central axis.

[0012] The beneficial effects of this utility model are:

[0013] By introducing four different chemical agents into four reagent cartridges, a metering pump is activated to extract the chemical agents from the cartridges and deliver them to various nozzles through drain pipes. The chemicals are then sprayed downwards into the reactor body, increasing the distribution area of ​​the chemical agents. Simultaneously, a servo motor is activated, using the meshing relationship between the drive wheel and the gear ring to drive the cylinder to rotate. This, in turn, causes the four drain pipes to rotate in a circular motion inside the reactor body. Multiple nozzles at the bottom of the drain pipes can rotate in a circular motion inside the reactor body along with the rotation of the cylinder, spraying the chemical agents. This effectively increases the uniformity of chemical agent addition during the polyurethane foam preparation process, thereby saving mixing time and improving reaction efficiency.

[0014] The chemical agents are dispensed in a categorized manner by using four agent cylinders, four metering pumps, and four drain pipes inside the agent delivery assembly. This avoids the phenomenon of premature reaction of chemical agents inside the pipeline and effectively improves the accuracy of chemical agent addition during the preparation and processing of polyurethane foam. Attached Figure Description

[0015] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0016] Figure 1 This is a perspective view of a polyurethane foam preparation mechanism according to the present invention;

[0017] Figure 2This is a front view of a polyurethane foam preparation mechanism according to the present invention;

[0018] Figure 3 for Figure 2 The diagram shows a main sectional view of the drug delivery assembly.

[0019] Figure 4 for Figure 3 The diagram shows an overhead sectional view of the cylinder.

[0020] In the diagram: 1. Reactor body; 2. Reactor cover; 3. Fixture; 4. Turntable; 5. Servo motor; 6. Drive shaft; 7. Drive wheel; 8. Reagent delivery assembly; 81. Cylinder; 82. Reagent cylinder; 83. Metering pump; 84. Drain pipe; 85. Nozzle; 86. Circular plate; 87. Gear ring; 88. Sealing cover. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] Please see Figure 1-4 This utility model provides a technical solution: a polyurethane foam preparation mechanism, including a reaction vessel body 1 and a vessel cover 2. The vessel cover 2 is placed on the top of the reaction vessel body 1. A fixing frame 3 is fixedly installed on the top of the vessel cover 2. A turntable 4 passes through the top of the fixing frame 3. A servo motor 5 is fixedly installed on one side of the top of the vessel cover 2 and inside the fixing frame 3. The servo motor 5 is connected to an external power supply and is equipped with a power control switch. A drive shaft 6 is fixedly installed at the output end of the servo motor 5. A drive wheel 7 is fixedly installed at the end of the drive shaft 6. A reagent delivery assembly 8 passes through the top of the turntable 4. The bottom of the reagent delivery assembly 8 passes through the top of the vessel cover 2 and extends into the interior of the reaction vessel body 1. The turntable 4 is rotatably connected to the fixing frame 3 through a bearing. The front and back of the fixing frame 3 are both open.

[0023] Please see Figure 2-4The reagent delivery assembly 8 includes a cylinder 81 and four reagent cylinders 82. The cylinder 81 extends through the top of the vessel cover 2. The four reagent cylinders 82 are evenly distributed around the center of the turntable 4 and extend through the four sides of the top of the turntable 4. The bottom of each of the four reagent cylinders 82 is connected to a metering pump 83 via a pipe. Each of the four metering pumps 83 is connected to an external power supply and is equipped with an individual power control switch. The outlet of each of the four metering pumps 83 is connected to a drain pipe 84. One end of each of the four drain pipes 84 gradually penetrates through the four sides of the cylinder 81 and the inner wall of the cylinder 81. The four sides extend into the interior of the reactor body 1. Multiple nozzles 85 are evenly connected to the bottom of each of the four drain pipes 84 from left to right. A circular plate 86 is fixedly fitted on the outside of the cylinder 81 and directly above the reactor cover 2. A gear ring 87 is fixedly fitted on the outside of the circular plate 86 and at the bottom of the drive wheel 7. Four reagent cylinders 82 are respectively loaded with isocyanate, polyol, foaming agent, and catalyst—four chemical agents used in the preparation of polyurethane foam. The metering pump 83 is a mechanical device that can accurately measure and transport fluids, mainly composed of a motor, The pump consists of three parts: the transmission box, the plunger cylinder, and the motor. The motor drives the worm gear pair via a coupling, converting circular motion into linear motion, which in turn drives the plunger to reciprocate within the cylinder. When the plunger moves backward, a negative pressure is created in the pump chamber, opening the suction valve and drawing liquid into the pump chamber. When the plunger moves forward, the suction valve closes, the discharge valve opens, and the liquid is expelled from the pump chamber and transported to a designated location through the discharge pipe. By adjusting the plunger's stroke length and reciprocating frequency, the liquid delivery rate can be precisely controlled. The gear ring 87 and the drive wheel... The four reagent cylinders 82 are meshed in seven phases. Each of the four cylinders 82 is equipped with a sealing cap 88 at the top. The sealing cap 88 is threadedly connected to the liquid inlet at the top of the reagent cylinder 82. The liquid inlet of the reagent cylinder 82 can be opened by rotating the sealing cap 88, and then the chemical agent can be delivered into the interior of the reagent cylinder 82. The cylinder 81 is rotatably connected to the vessel cover 2 through a bearing. The ends of the four drain pipes 84 away from the metering pump 83 are all sealed. The four drain pipes 84 are all fixedly connected to the cylinder 81. The center of the cylinder 81 and the center of the turntable 4 are located on the same longitudinal central axis.

[0024] Detailed Implementation: The reaction vessel 1 provides a preparation site for polyurethane foam. During the polyurethane foam preparation process, four chemical agents—isocyanate, polyol, foaming agent, and catalyst—need to be added and mixed. By unscrewing the top sealing caps 88 of the four agent cylinders 82 inside the agent delivery assembly 8, the four different chemical agents are introduced into the four agent cylinders 82 respectively. The metering pump 83 is started, and it draws the chemical agents from inside the agent cylinders 82 through pipelines and delivers them to each nozzle 85 through the drain pipe 84, spraying them downwards into the interior of the reaction vessel 1 to increase the distribution area of ​​the chemical agents. Simultaneously, the servo motor 5 is started. The servo motor 5 output drives the drive shaft 6 to rotate, the drive shaft 6 drives the drive wheel 7 to rotate, the drive wheel 7 drives the gear ring 87 to rotate, the gear ring 87 drives the cylinder 81 to rotate, and the cylinder 81 can simultaneously drive the four drain pipes 84 to perform circular motion inside the reactor body 1. At the same time, the four reagent cylinders 82 can drive the turntable 4 to rotate on the top of the fixed frame 3. The multiple nozzles 85 at the bottom of the drain pipes 84 can perform circular motion inside the reactor body 1 and spray chemical agents as the cylinder 81 rotates, which effectively increases the uniformity of chemical agent addition during the polyurethane foam preparation process, thereby saving mixing time and improving reaction efficiency.

[0025] The chemical agents are dispensed in a categorized manner through four agent cylinders 82, four metering pumps 83, and four drain pipes 84 inside the agent delivery assembly 8, which avoids the phenomenon of premature reaction of chemical agents inside the pipeline and effectively improves the accuracy of chemical agent addition during the preparation and processing of polyurethane foam.

[0026] 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 polyurethane foam preparation mechanism, comprising a reaction vessel body (1) and a vessel lid (2), characterized in that: The lid (2) is placed on the top of the reactor body (1). A fixed frame (3) is fixedly installed on the top of the lid (2). A turntable (4) passes through the top of the fixed frame (3). A servo motor (5) is fixedly installed on one side of the top of the lid (2) and inside the fixed frame (3). A drive shaft (6) is fixedly installed at the output end of the servo motor (5). A drive wheel (7) is fixedly installed at the end of the drive shaft (6). A reagent delivery assembly (8) passes through the top of the turntable (4). The bottom of the reagent delivery assembly (8) passes through the top of the lid (2) and extends into the interior of the reactor body (1).

2. The polyurethane foam preparation mechanism according to claim 1, characterized in that: The turntable (4) is rotatably connected to the fixed frame (3) via a bearing, and the front and back of the fixed frame (3) are both open.

3. The polyurethane foam preparation mechanism according to claim 1, characterized in that: The reagent delivery assembly (8) includes a cylinder (81) and four reagent cylinders (82). The cylinder (81) passes through the top of the vessel cover (2). The four reagent cylinders (82) are evenly inserted around the center of the turntable (4) and pass through the four sides of the top of the turntable (4). The bottom of each of the four reagent cylinders (82) is connected to a metering pump (83) through a pipe. The outlet of each of the four metering pumps (83) is connected to a drain pipe (84). One end of each of the four drain pipes (84) gradually passes through the four sides of the cylinder (81) and the four sides of the inner wall of the cylinder (81) and extends into the interior of the reactor body (1). The bottom of each of the four drain pipes (84) is evenly connected to multiple nozzles (85) from left to right. A circular plate (86) is fixedly fitted on the outside of the cylinder (81) and directly above the vessel cover (2). A toothed ring (87) is fixedly fitted on the outside of the circular plate (86) and at the bottom of the drive wheel (7).

4. The polyurethane foam preparation mechanism according to claim 3, characterized in that: The gear ring (87) meshes with the drive wheel (7), and the top of each of the four medicine cylinders (82) is provided with a sealing cap (88).

5. A polyurethane foam preparation mechanism according to claim 3, characterized in that: The cylinder (81) is rotatably connected to the lid (2) via a bearing, and the ends of the four drain pipes (84) away from the metering pump (83) are all sealed.

6. A polyurethane foam preparation mechanism according to claim 3, characterized in that: All four drain pipes (84) are fixedly connected to the cylinder (81), and the center of the cylinder (81) and the center of the turntable (4) are located on the same longitudinal central axis.

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