A polyurethane raw material stirring kettle

Abstract

The utility model discloses a polyurethane raw material stirring kettle, which relates to the technical field of polyurethane raw material stirring preparation, including a kettle body assembly consisting of an outer kettle body, an inner kettle body, a discharge port, and a top cover, and also including a heating assembly and a stirring assembly; the heating assembly includes an outer heating unit and an inner heating unit; the outer heating unit is used to heat the raw materials near the inner wall side of the inner kettle body, and the inner heating unit is used to heat the raw materials near the central area of ​​the inner kettle body, and cooperates with the stirring assembly to stir the raw materials, so as to achieve uniform mixing and heating of the raw materials. The utility model sets a heating assembly, so that the heating medium flowing through the first heating coil and the second heating coil can achieve uniform heating of the raw materials inside and outside. Compared with the traditional structure with only one outer heating coil for heating, not only is the temperature more uniform, but the heating efficiency is also faster, which can effectively improve the efficiency and quality of the polyurethane raw material stirring reaction.

Description

Technical Field

[0001] The utility model relates to the technical field of polyurethane raw material stirring preparation, in particular to a polyurethane raw material stirring kettle. Background Art

[0002] Polyurethane (PU), whose full name is polyurethane, is a polymer material with excellent mechanical properties formed by the condensation reaction of polyols and polyisocyanates. It can be made into polyurethane plastics (mainly foam plastics), polyurethane fibers (also known as spandex), polyurethane rubbers and elastomers.

[0003] A stirring kettle is an indispensable equipment for the mixing reaction of polyurethane raw materials. Generally, the reaction temperature of the polyurethane reaction is between 80°C and 120°C. When the reaction temperature is low, the reaction rate is slow and it takes a long time to complete the reaction process. At the same time, side reactions are prone to occur, which affects the quality of the product. The heating of the existing stirring kettle is mostly carried out by heating the heating medium flowing through the heating coils distributed in the interlayer of the kettle body. This will cause the temperature of the raw materials near the inner wall of the stirring kettle to be higher, while the temperature of the raw materials near the middle area is relatively low. It takes a long time of stirring and mixing to complete the full reaction of the polyurethane. Based on this, a polyurethane raw material stirring kettle is provided. Utility Model Content

[0004] The purpose of the utility model is to provide a polyurethane raw material stirring kettle in order to solve the above-mentioned background problems.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a polyurethane raw material stirring kettle, comprising a kettle body assembly consisting of an outer kettle body, an inner kettle body, a discharge port and a top cover, wherein the inner kettle body is fixed to the inner side of the outer kettle body, the discharge port is fixed to the bottom of the inner kettle body and is communicated with the inner kettle body cavity, and the discharge port penetrates to the bottom of the outer kettle body, the top cover is installed on the outer kettle body and the top of the inner kettle body, a heating component is arranged in the middle area between the outer kettle body and the inner kettle body and on the inner side of the inner kettle body, the heating component is used to heat the inside of the outer kettle body, a stirring component extending to the inside of the inner kettle body is arranged at the bottom of the top cover, and the stirring component is used to stir the raw materials inside the outer kettle body; the heating component comprises an external heating unit and an internal heating unit; the external heating unit is used to heat the raw materials near the inner wall side of the inner kettle body, and the internal heating unit is used to heat the raw materials near the central area of ​​the inner kettle body, and the stirring of the raw materials by the stirring component is used to achieve uniform heating of the raw materials.

[0006] The external heating unit includes a first heating coil, a water inlet pipe, and a water outlet pipe; the first heating coil is wound and fixed on the outside of the inner kettle body, the water inlet pipe and the water outlet pipe are distributed on both sides of the outer wall of the outer kettle body and penetrate between the inner side of the outer kettle body and the outer side of the inner kettle body, and the water inlet pipe and the water outlet pipe are respectively connected to the two end heads of the first heating coil; the heating medium flows through the channel formed by the water inlet pipe, the first heating coil, and the water outlet pipe, so as to heat the raw materials close to the side of the inner kettle body wall.

[0007] As a further solution of the utility model: the internal heating unit comprises an inner heat exchange cylinder, a connecting frame, a second heating coil, a branch inlet pipe, and a converging outlet pipe; the inner heat exchange cylinder is distributed in the middle of the inner inner kettle body, and the inner heat exchange cylinder is welded and fixed to the inner wall of the inner kettle body by the connecting frame; the inner side of the inner heat exchange cylinder is a cavity structure, and the second heating coil is distributed inside the inner heat exchange cylinder cavity, one end of the branch inlet pipe passes through the inner kettle body and is connected to the water inlet pipe, and the other end of the branch inlet pipe passes through the inner heat exchange cylinder and is connected to one end of the second heating coil; one end of the converging outlet pipe is connected to the other end of the second heating coil, and passes through the inner heat exchange cylinder, the inner kettle body, the outer kettle body to the outside of the outer kettle body in sequence, and the other end of the converging outlet pipe is connected to the water outlet pipe; the heating medium flows through the channel composed of the branch inlet pipe, the second heating coil, and the converging outlet pipe, so as to heat the raw materials near the central area of ​​the inner kettle body.

[0008] As a further solution of the utility model: the stirring assembly includes a driving motor, a stirring shaft, a first stirring arm, and a second stirring arm; the driving motor is installed and fixed at the center position of the top cover, the stirring shaft is fixed to the output end of the driving motor and passes through the top cover, the inner heat exchange cylinder to the bottom of the inner kettle body in sequence, and a center hole for the stirring shaft to pass through is formed in the middle of the inner heat exchange cylinder, and the inner diameter of the center hole matches the outer diameter of the stirring shaft; the first stirring arm is fixed to the outside of the stirring shaft and fits the outer wall of the inner heat exchange cylinder, the second stirring arm is fixed to the outside of the stirring shaft and is distributed below the first stirring arm, and the second stirring arm fits the inner wall of the inner kettle body; the driving motor drives the first stirring arm and the second stirring arm to run in a circular motion, so as to realize the stirring of the raw materials and the scraping operation of the outer wall of the inner heat exchange cylinder and the inner wall of the inner kettle body.

[0009] As a further solution of the utility model: multiple first stirring arms and second stirring arms are arranged with the stirring shaft as the center, and the multiple first stirring arms and second stirring arms are evenly distributed in the circumferential direction; spiral stirring blades are fixed between adjacent first stirring arms and second stirring arms in the circumferential direction.

[0010] As a further solution of the utility model: a reinforcing rod is fixed between the first stirring arm, the top of the second stirring arm and the bottom of the spiral stirring blade and the outer wall of the stirring shaft which are relatively aligned.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] By setting up a heating component, the heating medium flowing through the first heating coil and the second heating coil can achieve uniform heating of the raw materials on the inside and outside of the inner kettle. Compared with the traditional structure in which only one heating coil is used for heating the outer layer, not only is the temperature more uniform, but the heating efficiency is also faster. By setting up a stirring component, while achieving the stirring of the raw materials, the outer wall of the inner heat exchange tube and the inner wall of the inner kettle can be scraped, thereby preventing the raw materials from adhering to the outer wall of the inner heat exchange tube and the inner wall of the inner kettle, which can effectively improve the stirring reaction efficiency and quality of the polyurethane raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the internal structure of the outer kettle body of the utility model;

[0015] Figure 3 This is a schematic diagram of the internal structure of the kettle assembly of the utility model;

[0016] Figure 4 It is a schematic diagram of the split structure of the kettle body component and the stirring component of the utility model;

[0017] Figure 5 It is a schematic diagram of the internal structure of the inner heat exchange cylinder of the utility model.

[0018] In the figure: 1. kettle body assembly; 101. outer kettle body; 102. inner kettle body; 103. discharge port; 104. top cover; 2. heating assembly; 201. first heating coil; 202. water inlet pipe; 203. water outlet pipe; 204. inner heat exchange tube; 205. connecting frame; 206. second heating coil; 207. branch inlet pipe; 208. converging outlet pipe; 3. stirring assembly; 301. drive motor; 302. stirring shaft; 303. first stirring arm; 304. second stirring arm; 305. spiral stirring blade; 306. reinforcing rod. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figures 1 to 5In an embodiment of the utility model, a polyurethane raw material stirring kettle includes a kettle body assembly 1 consisting of an outer kettle body 101, an inner kettle body 102, a discharge port 103, and a top cover 104. The inner kettle body 102 is fixed to the inner side of the outer kettle body 101, the discharge port 103 is fixed to the bottom of the inner kettle body 102 and is communicated with the inner cavity of the inner kettle body 102, and the discharge port 103 penetrates to the bottom of the outer kettle body 101, the top cover 104 is installed on the outer kettle body 101 and the top of the inner kettle body 102, and a heating component 2 is arranged in the middle area between the outer kettle body 101 and the inner kettle body 102 and on the inner side of the inner kettle body 102. The heating component 2 is used to heat the inside of the outer kettle body 101, and a stirring component 3 extending to the inside of the inner kettle body 102 is arranged at the bottom of the top cover 104. The stirring component 3 is used to stir the raw materials inside the outer kettle body 101.

[0021] The heating component 2 includes an external heating unit and an internal heating unit; the external heating unit is used to heat the raw materials near the inner wall side of the inner kettle body 102, and the internal heating unit is used to heat the raw materials near the center area of ​​the inner kettle body 102, and cooperates with the stirring component 3 to stir the raw materials to achieve uniform heating of the raw materials.

[0022] The external heating unit includes a first heating coil 201, a water inlet pipe 202, and a water outlet pipe 203; the first heating coil 201 is wound and fixed on the outside of the inner kettle body 102, the water inlet pipe 202 and the water outlet pipe 203 are distributed on both sides of the outer wall of the outer kettle body 101 and penetrate between the inner side of the outer kettle body 101 and the outer side of the inner kettle body 102, the water inlet pipe 202 and the water outlet pipe 203 are respectively connected to the two ends of the first heating coil 201; the heating medium flows through the channel formed by the water inlet pipe 202, the first heating coil 201, and the water outlet pipe 203, so as to heat the raw materials close to the inner wall side of the inner kettle body 102.

[0023] The inner heating unit includes an inner heat exchange tube 204, a connecting frame 205, a second heating coil 206, a shunt inlet pipe 207, and a converging outlet pipe 208; the inner heat exchange tube 204 is distributed in the middle of the inner side of the inner kettle body 102, and the inner heat exchange tube 204 is welded and fixed to the inner wall of the inner kettle body 102 through the connecting frame 205; the inner side of the inner heat exchange tube 204 is a cavity structure, the second heating coil 206 is distributed inside the cavity of the inner heat exchange tube 204, one end of the shunt inlet pipe 207 passes through the inner kettle body 102 and is connected to the water inlet pipe 202, and the other end of the shunt inlet pipe 207 passes through the inner kettle body 102 and is connected to the water inlet pipe 202. One end of the converging outlet pipe 208 passes through the inner heat exchange tube 204 and is connected to one end of the second heating coil 206; one end of the converging outlet pipe 208 is connected to the other end of the second heating coil 206, and sequentially passes through the inner heat exchange tube 204, the inner kettle body 102, the outer kettle body 101 to the outside of the outer kettle body 101, and the other end of the converging outlet pipe 208 is connected to the water outlet pipe 203; the heating medium flows through the channel composed of the diversion inlet pipe 207, the second heating coil 206, and the converging outlet pipe 208, so as to heat the raw materials near the central area of ​​the inner kettle body 102.

[0024] In the present embodiment, it should be additionally explained that the top cover 104 is also provided with structures such as a manhole, a sight glass, a feed port, and a temperature measuring port. Among them, multiple feed ports are provided to facilitate the loading operation of various raw materials. This part of the structure is a conventional structure of an existing stirring kettle, so these structures will not be elaborated here.

[0025] When the polyurethane raw material is stirred and reacted, the heating medium can be introduced into the interior of the heating component 2 to heat the raw material inside the inner kettle body 102. The heating principle is as follows:

[0026] The heating medium is transported to the inside of the water inlet pipe 202 through an external pipeline, and is diverted to the first heating coil 201 and the inside of the diverter inlet pipe 207 through the water inlet pipe 202. The heating medium flowing through the first heating coil 201 can exchange heat with the raw material close to the inner wall of the inner kettle body 102, and then be discharged through the water outlet pipe 203; and the heating medium entering the diverter inlet pipe 207 can flow into the second heating coil 206. This part of the heating medium can exchange heat with the raw material close to the inner heat exchange tube 204, and then flow into the water outlet pipe 203 through the converging outlet pipe 208 to be discharged.

[0027] Through the heating operation of the above two heating coils, uniform heating of the inner and outer raw materials can be achieved. Compared with the traditional structure with only one heating coil heating the outer layer, not only the temperature is more uniform, but also the heating efficiency is faster, which can effectively improve the stirring reaction efficiency and quality of the polyurethane raw materials.

[0028] Please refer to Figures 1 to 4 The stirring assembly 3 includes a driving motor 301, a stirring shaft 302, a first stirring arm 303, and a second stirring arm 304; the driving motor 301 is installed and fixed at the center of the top of the top cover 104, the stirring shaft 302 is fixed to the output end of the driving motor 301 and passes through the top cover 104, the inner heat exchange tube 204 to the bottom of the inner kettle body 102 in sequence, and a center hole for the stirring shaft 302 to pass through is formed in the middle of the inner heat exchange tube 204, and the inner diameter of the center hole matches the outer diameter of the stirring shaft 302; The first stirring arm 303 is fixed to the outside of the stirring shaft 302 and is in contact with the outer wall of the inner heat exchange tube 204. The second stirring arm 304 is fixed to the outside of the stirring shaft 302 and is distributed below the first stirring arm 303. The second stirring arm 304 is in contact with the inner wall of the inner kettle body 102. The driving motor 301 drives the first stirring arm 303 and the second stirring arm 304 to operate in a circular motion, so as to achieve stirring of the raw materials and scraping of the outer wall of the inner heat exchange tube 204 and the inner wall of the inner kettle body 102.

[0029] A plurality of first stirring arms 303 and second stirring arms 304 are arranged around the stirring shaft 302 , and the plurality of first stirring arms 303 and second stirring arms 304 are evenly distributed along the circumferential direction; a spiral stirring blade 305 is fixed between adjacent first stirring arms 303 and second stirring arms 304 along the circumferential direction.

[0030] A reinforcing rod 306 is fixed between the first stirring arm 303 , the top of the second stirring arm 304 , the bottom of the spiral stirring blade 305 and the outer wall of the stirring shaft 302 .

[0031] In this embodiment: when the polyurethane raw material is stirred, the drive motor 301 can be started, and the drive motor 301 drives the first stirring arm 303, the second stirring arm 304, and the spiral stirring blade 305 to perform circular motion. While the raw material is stirred, the outer wall of the inner heat exchange tube 204 and the inner wall of the inner kettle body 102 can be scraped to prevent the raw material from adhering to the outer wall of the inner heat exchange tube 204 and the inner wall of the inner kettle body 102, thereby ensuring sufficient stirring reaction of the polyurethane raw material.

[0032] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A polyurethane raw material stirring kettle, comprising a kettle body assembly (1) consisting of an outer kettle body (101), an inner kettle body (102), a discharge port (103), and a top cover (104), wherein the inner kettle body (102) is fixed to the inner side of the outer kettle body (101), the discharge port (103) is fixed to the bottom of the inner kettle body (102) and is in communication with the inner cavity of the inner kettle body (102), and the discharge port (103) extends through to below the bottom of the outer kettle body (101), and the top cover (104) is installed on the top of the outer kettle body (101) and the inner kettle body (102), characterized in that: A heating component (2) is arranged in the middle area between the outer kettle body (101) and the inner kettle body (102) and inside the inner kettle body (102); a stirring component (3) extending into the interior of the inner kettle body (102) is arranged at the bottom of the top cover (104); the heating component (2) comprises an outer heating unit and an inner heating unit; The external heating unit comprises a first heating coil (201), a water inlet pipe (202), and a water outlet pipe (203); the first heating coil (201) is wound and fixed on the outside of the inner kettle body (102); the water inlet pipe (202) and the water outlet pipe (203) are distributed on both sides of the outer wall of the outer kettle body (101) and penetrate between the inner side of the outer kettle body (101) and the outer side of the inner kettle body (102); the water inlet pipe (202) and the water outlet pipe (203) are respectively connected to two ends of the first heating coil (201); The internal heating unit comprises an internal heat exchange tube (204), a connecting frame (205), a second heating coil (206), a flow-dividing inlet pipe (207), and a converging outlet pipe (208); the internal heat exchange tube (204) is distributed in the middle of the inner side of the inner kettle body (102), and the internal heat exchange tube (204) is welded and fixed to the inner wall of the inner kettle body (102) via the connecting frame (205); the inner side of the internal heat exchange tube (204) is a hollow structure, the second heating coil (206) is distributed inside the hollow of the internal heat exchange tube (204), one end of the flow-dividing inlet pipe (207) passes through the inner kettle body (102) and the water inlet pipe (208); 02) is connected and conducted, the other end of the branch inlet pipe (207) passes through the inner heat exchange tube (204) and is connected and conducted with one end of the second heating coil (206); one end of the converging outlet pipe (208) is connected and conducted with the other end of the second heating coil (206), and sequentially passes through the inner heat exchange tube (204), the inner kettle body (102), the outer kettle body (101) to the outside of the outer kettle body (101), and the other end of the converging outlet pipe (208) is connected and conducted with the water outlet pipe (203); the heating medium flows through the channel formed by the branch inlet pipe (207), the second heating coil (206), and the converging outlet pipe (208).

2. A polyurethane raw material stirring kettle according to claim 1, characterized in that: The stirring assembly (3) comprises a driving motor (301), a stirring shaft (302), a first stirring arm (303), and a second stirring arm (304); the driving motor (301) is installed and fixed at the center position of the top of the top cover (104); the stirring shaft (302) is fixed to the output end of the driving motor (301) and passes through the top cover (104), the inner heat exchange tube (204) to the bottom of the inner kettle body (102) in sequence; a center hole for the stirring shaft (302) to pass through is formed in the middle of the inner heat exchange tube (204), and the inner diameter of the center hole matches the outer diameter of the stirring shaft (302); the first stirring arm (303) is fixed to the outside of the stirring shaft (302) and is in contact with the outer wall of the inner heat exchange tube (204); the second stirring arm (304) is fixed to the outside of the stirring shaft (302) and is distributed below the first stirring arm (303); the second stirring arm (304) is in contact with the inner wall of the inner kettle body (102).

3. A polyurethane raw material stirring kettle according to claim 2, characterized in that: A plurality of the first stirring arms (303) and the second stirring arms (304) are arranged with the stirring shaft (302) as the center, and the plurality of the first stirring arms (303) and the second stirring arms (304) are evenly distributed along the circumferential direction; and a spiral stirring blade (305) is fixed between adjacent first stirring arms (303) and second stirring arms (304) along the circumferential direction.

4. A polyurethane raw material stirring kettle according to claim 3, characterized in that: A reinforcing rod (306) is fixed between the first stirring arm (303), the top of the second stirring arm (304), the bottom of the spiral stirring blade (305), and the outer wall of the stirring shaft (302), which are aligned with each other.

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