Polyurethane foaming machine

Abstract

The utility model discloses a polyurethane foaming machine, which relates to the technical field of polyurethane foaming, and comprises a kettle body assembly consisting of an outer kettle body, an inner kettle body, a top cover, a manhole, a feed port and a discharge port, an outer heating assembly and a stirring heating assembly, the outer heating assembly is used for heating the inside of the inner kettle body; the stirring and heating assembly comprises a stirring unit and an inner heating unit; the stirring unit is used for stirring materials in the inner kettle body; the inner heating unit is used for heating materials distributed in the middle area of the inner kettle body. By arranging the stirring and heating assembly, raw materials can be synchronously heated while being stirred, synchronous, uniform and sufficient heating of the raw materials can be achieved in cooperation with heating operation of the external heating assembly, and compared with a traditional structure only with external heating, the heating efficiency is higher, and the heating effect is better. The stirring and mixing efficiency of the polyurethane raw materials can be further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of polyurethane foaming, in particular to a polyurethane foaming machine. Background Art

[0002] Polyurethane foaming machine is a special equipment for the infusion and foaming of polyurethane foam plastics. As long as the performance indicators of the polyurethane component raw materials meet the formula requirements, this equipment can produce uniform and qualified foam products. It is made of polyether polyols and polyisocyanates in the presence of various chemical additives such as foaming agents, catalysts, emulsifiers, etc., through chemical reaction foaming to make foam plastics.

[0003] The foaming principle of the polyurethane foaming machine is as follows: After the two component liquids A and B are accurately proportioned and stirred at high speed in their respective raw material kettles, two high-precision metering pumps transport the two component liquids A and B to the stirring head respectively, so that the two liquids are mixed evenly and sprayed out to form the required product.

[0004] In the process of mixing the two component solutions A and B, a heating operation is required. The existing stirring kettle is heated by the heating medium flowing through the heating coil distributed in the interlayer of the kettle body. This will make the temperature of the raw materials near the outer wall of the stirring kettle higher, resulting in uneven material temperature distribution, and it takes longer to complete full mixing. In order to solve the above technical problems, a polyurethane foaming machine is provided. Utility Model Content

[0005] The purpose of the utility model is to provide a polyurethane foaming machine in order to solve the above-mentioned problems.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a polyurethane foaming machine, comprising a kettle body assembly consisting of an outer kettle body, an inner kettle body, a top cover, a manhole, a feeding port, and a discharge port, wherein the inner kettle body is fixed to the inner side of the outer kettle body, the top cover is fixed to the top of the outer kettle body and the inner kettle body, the manhole and the feeding port are fixed to the top of the top cover along the circumference, the discharge port is fixed to the bottom of the inner kettle body and extends through to the bottom of the outer kettle body, an external heating assembly is arranged on the outer side of the outer kettle body and in the middle area between the outer kettle body and the inner kettle body, the external heating assembly is used to heat the inside of the inner kettle body; a stirring and heating assembly extending to the inside of the inner kettle body is arranged on the top of the top cover, the stirring and heating assembly comprises a stirring unit and an internal heating unit; the stirring unit is used to stir the material inside the inner kettle body; the internal heating unit is used to heat the material distributed in the middle area of ​​the inner kettle body;

[0007] The stirring unit includes a driving motor, a central rotating shaft, an outer sleeve, and a C-shaped stirring rod; the driving motor is fixedly installed above the center of the top cover through a bracket, the central rotating shaft is fixedly connected to the output end of the driving motor, the outer sleeve is fixed to the outside of the central rotating shaft, and the central rotating shaft and the outer sleeve penetrate the top cover and extend to the inside of the inner kettle body; the C-shaped stirring rod is fixed to the outside of the central rotating shaft and the outer sleeve, and the C-shaped stirring rod is driven by the driving motor to run in a circular motion to achieve the stirring operation of the material.

[0008] As a further solution of the utility model: the internal heating unit includes a first slip ring and a second slip ring; the central rotating shaft, the outer sleeve and the C-shaped stirring rod are all hollow structures, and the two ends of the C-shaped stirring rod are respectively connected to the inner cavities of the central rotating shaft and the outer sleeve; the rotor of the first slip ring is installed on the outside of the central rotating shaft and is connected and communicated with the inner cavity of the central rotating shaft through a connecting pipe, and the stator of the first slip ring is fixedly installed on the top of the top cover through a bracket; the rotor of the second slip ring is installed on the outside of the outer sleeve and is connected and communicated with the inner cavity of the outer sleeve through a connecting pipe, and the stator of the first slip ring is fixedly installed on the top of the top cover through a bracket; the stator of the second slip ring is connected to the water outlet pipe of the heating medium storage tank through a pipeline and a circulating pump; the stator of the first slip ring is connected to the return pipe of the heating medium storage tank through a pipeline; an electric heating device is arranged in the heating medium storage tank.

[0009] As a further solution of the utility model: the C-shaped stirring rods are provided in multiple groups, the horizontal lengths and vertical heights of the multiple groups of C-shaped stirring rods decrease successively, and the multiple groups of C-shaped stirring rods are staggeredly distributed around the central rotation axis.

[0010] As a further solution of the utility model: the external heating component includes a water inlet, a heating coil, and a water outlet; the heating coil is distributed between the outer kettle body and the inner kettle body and is welded and fixed to the outer side of the inner kettle body; the water inlet and the heating coil are respectively distributed on both sides of the outside of the outer kettle body and penetrate the outer kettle body, and are respectively connected to the two ends of the heating coil.

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

[0012] By setting up a stirring and heating component, the raw materials can be heated synchronously while being stirred. Combined with the heating operation of the external heating component, the raw materials can be heated synchronously, evenly and fully. Compared with the traditional structure with only external heating, not only is the heating more uniform, but the heating efficiency is also faster, which can further improve the stirring and mixing efficiency of the polyurethane raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0014] Figure 2This is a schematic diagram of the internal structure of the kettle assembly of the utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the stirring and heating component of the utility model;

[0016] Figure 4 This is a schematic diagram of the internal structure of the stirring and heating component of the utility model;

[0017] Figure 5 For this utility model Figure 4 Enlarged view of part A.

[0018] In the figure: 1. kettle body assembly; 101. outer kettle body; 102. inner kettle body; 103. top cover; 104. manhole; 105. feeding port; 106. discharge port; 2. external heating assembly; 201. water inlet; 202. heating coil; 203. water outlet; 3. stirring and heating assembly; 301. drive motor; 302. central shaft; 303. outer sleeve; 304. C-type stirring rod; 305. first slip ring; 306. second slip ring; 4. circulation pump; 5. heating medium storage tank. 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 5 In an embodiment of the utility model, a polyurethane foaming machine includes a kettle body assembly 1 consisting of an outer kettle body 101, an inner kettle body 102, a top cover 103, a manhole 104, a feeding port 105, and a discharge port 106. The inner kettle body 102 is fixed to the inner side of the outer kettle body 101, the top cover 103 is fixed to the top of the outer kettle body 101 and the inner kettle body 102, the manhole 104 and the feeding port 105 are fixed to the top of the top cover 103 along the circumference, the discharge port 106 is fixed to the bottom of the inner kettle body 102 and extends through to the bottom of the outer kettle body 101. An external heating assembly 2 is arranged on the outer side of the outer kettle body 101 and in the middle area between the outer kettle body 101 and the inner kettle body 102. The external heating assembly 2 is used to heat the inside of the inner kettle body 102.

[0021] A stirring and heating assembly 3 extending into the inner kettle body 102 is provided on the top of the top cover 103, and the stirring and heating assembly 3 includes a stirring unit and an internal heating unit; the stirring unit is used to stir the material inside the inner kettle body 102; the internal heating unit is used to heat the material distributed in the middle area of ​​the inner kettle body 102.

[0022] The external heating component 2 includes a water inlet 201, a heating coil 202, and a water outlet 203; the heating coil 202 is distributed between the outer kettle body 101 and the inner kettle body 102 and is welded and fixed to the outer side of the inner kettle body 102; the water inlet 201 and the heating coil 202 are respectively distributed on both sides of the outside of the outer kettle body 101 and penetrate the outer kettle body 101, and are respectively connected to the two ends of the heating coil 202.

[0023] The stirring unit includes a driving motor 301, a central rotating shaft 302, an outer sleeve 303, and a C-shaped stirring rod 304; the driving motor 301 is fixedly installed above the center of the top cover 103 through a bracket, the central rotating shaft 302 is fixedly connected to the output end of the driving motor 301, the outer sleeve 303 is fixed to the outside of the central rotating shaft 302, and the central rotating shaft 302 and the outer sleeve 303 penetrate the top cover 103 and extend to the inside of the inner kettle body 102; the C-shaped stirring rod 304 is fixed to the outside of the central rotating shaft 302 and the outer sleeve 303, and the C-shaped stirring rod 304 is driven by the driving motor 301 to run in a circle to realize the stirring operation of the material.

[0024] The internal heating unit includes a first slip ring 305 and a second slip ring 306 ; the central shaft 302 , the outer sleeve 303 , and the C-shaped stirring rod 304 are all hollow structures, and the two ends of the C-shaped stirring rod 304 are respectively connected to the inner cavities of the central shaft 302 and the outer sleeve 303 .

[0025] The rotor of the first slip ring 305 is installed on the outside of the central rotating shaft 302 and is connected to the inner cavity of the central rotating shaft 302 through a connecting pipe, and the stator of the first slip ring 305 is fixedly installed on the top of the top cover 103 through a bracket; the rotor of the second slip ring 306 is installed on the outside of the outer sleeve 303 and is connected to the inner cavity of the outer sleeve 303 through a connecting pipe, and the stator of the first slip ring 305 is fixedly installed on the top of the top cover 103 through a bracket; the stator of the second slip ring 306 is connected to the water outlet pipe of the heating medium storage tank 5 through a pipeline and a circulating pump 4; the stator of the first slip ring 305 is connected to the return pipe of the heating medium storage tank 5 through a pipeline; an electric heating device is arranged in the heating medium storage tank 5.

[0026] In this embodiment, it should be noted that the feeding port 105 is provided with a corresponding number according to the amount of polyurethane raw materials, and is also provided with a temperature measuring port, a sight glass and other structures. Since these are conventional structures of existing reactors, they will not be described in detail here. The reactor body assembly 1 is a raw material stirring device (A material or B material) of the polyurethane foaming machine, and its discharge port 106 is connected to the stirring head of the polyurethane foaming machine through a metering pump.

[0027] When the polyurethane raw material is stirred by this kettle body assembly 1, the driving motor 301 is started, and the driving motor 301 drives the central shaft 302, the outer sleeve 303, and the C-shaped stirring rod 304 to rotate synchronously, thereby realizing the stirring operation of the raw materials inside the inner kettle body 102; at the same time, the heating medium is transported to the heating coil 202 through the water inlet 201. At this time, the heating medium can exchange heat with the raw materials close to the inner wall of the inner kettle body 102, and the heating medium after heat exchange is discharged through the water outlet 203.

[0028] In addition, the stator of the second slip ring 306 is connected to the water outlet pipe of the heating medium storage tank 5 through the pipeline and the circulation pump 4. The heating medium can enter the outer sleeve 303 through the first slip ring 306 and flow into each C-type stirring rod 304. During this process, the raw materials in contact with the C-type stirring rod 304 and the outer sleeve 303 can be heated, and the circular rotation of the C-type stirring rod 304 can make the heating more uniform. After that, the heating medium flows upward through the inner cavity of the central rotating shaft 302, and is finally discharged through the connecting pipe on the stator of the first slip ring 305, and enters the heating medium storage tank 5 again, and the heating medium is heated by the electric heating device set in the heating medium storage tank 5.

[0029] Through the cooperation between the internal heating unit and the external heating component 2, the raw materials can be heated synchronously, uniformly and fully. Compared with the traditional structure with only external heating, not only the heating is more uniform, but also the heating efficiency is faster, which can further improve the stirring and mixing efficiency of the polyurethane raw materials.

[0030] Please refer to Figures 2 to 5 There are multiple groups of C-shaped stirring rods 304, and the horizontal lengths and vertical heights of the multiple groups of C-shaped stirring rods 304 decrease successively, and the multiple groups of C-shaped stirring rods 304 are staggeredly distributed around the central rotation axis 302.

[0031] In this embodiment, the C-shaped stirring rods 304 of different sizes can realize all-round stirring of the raw materials, thereby achieving a high-efficiency stirring effect.

[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 foaming machine, comprising a kettle body assembly (1) consisting of an outer kettle body (101), an inner kettle body (102), a top cover (103), a manhole (104), a feeding port (105), and a discharge port (106), wherein the inner kettle body (102) is fixed to the inner side of the outer kettle body (101), the top cover (103) is fixed to the top of the outer kettle body (101) and the inner kettle body (102), the manhole (104) and the feeding port (105) are fixed to the top of the top cover (103) along a circumference, and the discharge port (106) is fixed to the bottom of the inner kettle body (102) and extends through to below the bottom of the outer kettle body (101), characterized in that: An external heating component (2) is arranged on the outside of the outer kettle body (101) and in the middle area between the outer kettle body (101) and the inner kettle body (102); a stirring and heating component (3) extending into the interior of the inner kettle body (102) is arranged on the top of the top cover (103); the stirring and heating component (3) comprises a stirring unit and an internal heating unit; The stirring unit comprises a driving motor (301), a central rotating shaft (302), an outer sleeve (303), and a C-shaped stirring rod (304); the driving motor (301) is fixedly mounted above the center of the top cover (103) via a bracket; the central rotating shaft (302) is fixedly connected to the output end of the driving motor (301); the outer sleeve (303) is fixed to the outside of the central rotating shaft (302); the central rotating shaft (302) and the outer sleeve (303) penetrate the top cover (103) and extend to the inside of the inner kettle body (102); the C-shaped stirring rod (304) is fixed to the outside of the central rotating shaft (302) and the outer sleeve (303); the driving motor (301) drives the C-shaped stirring rod (304) to move in a circular motion to achieve a stirring operation of the material.

2. A polyurethane foaming machine according to claim 1, characterized in that: The internal heating unit comprises a first slip ring (305) and a second slip ring (306); the central rotating shaft (302), the outer sleeve (303), and the C-shaped stirring rod (304) are all hollow structures, and the two ends of the C-shaped stirring rod (304) are respectively connected to the inner cavities of the central rotating shaft (302) and the outer sleeve (303); the rotor of the first slip ring (305) is installed on the outside of the central rotating shaft (302) and is connected to the inner cavity of the central rotating shaft (302) through a connecting pipe, and the stator of the first slip ring (305) is connected to the top cover (103) through a bracket. ) is fixedly installed on the top; the rotor of the second slip ring (306) is installed on the outside of the outer sleeve (303) and is connected to the inner cavity of the outer sleeve (303) through a connecting pipe, and the stator of the first slip ring (305) is fixedly installed on the top of the top cover (103) through a bracket; the stator of the second slip ring (306) is connected to the water outlet pipe of the heating medium storage tank (5) through a pipeline and a circulation pump (4); the stator of the first slip ring (305) is connected to the water return pipe of the heating medium storage tank (5) through a pipeline; and an electric heating device is arranged in the heating medium storage tank (5).

3. A polyurethane foaming machine according to claim 2, characterized in that: A plurality of groups of C-shaped stirring rods (304) are provided, the transverse lengths and vertical heights of the plurality of groups of C-shaped stirring rods (304) decrease in sequence, and the plurality of groups of C-shaped stirring rods (304) are staggeredly distributed around a central rotation axis (302) in a circular pattern.

4. A polyurethane foaming machine according to claim 1, characterized in that: The external heating component (2) comprises a water inlet (201), a heating coil (202), and a water outlet (203); the heating coil (202) is distributed between the outer kettle body (101) and the inner kettle body (102) and is welded and fixed to the outer side of the inner kettle body (102); the water inlet (201) and the heating coil (202) are respectively distributed on both sides of the outer side of the outer kettle body (101) and penetrate the outer kettle body (101), and are respectively connected to both ends of the heating coil (202).

Images