Raw material mixing device for rigid polyurethane foam production

Abstract

The utility model discloses a raw material mixing device for rigid polyurethane foam production, which comprises a mixing box, the outer side of the mixing box is fixedly connected with a feed pipe, the upper end of the feed pipe is fixedly connected with a feed hopper, and four groups of stirring components are arranged in an inner cavity of the mixing box. The raw material mixing device comprises a mixing box, the mixing box is provided with four groups of stirring assemblies, the sides, close to each other, of the four groups of stirring assemblies are provided with material lifting assemblies, the lower end of the mixing box is fixedly connected with a material collecting hopper, and the lower end of the material collecting hopper is fixedly connected with a discharging pipe. The spiral blade can also rotate along with the rotation of the rotating shaft, and at the moment, the lifting barrel is designed on the outer side of the spiral blade, so that the raw materials with large specific gravity at the bottom of the mixing box can be lifted upwards, the raw materials at the bottom can participate in the mixing process in time, the circular flow of the raw materials is increased, and the mixing efficiency is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to rigid polyurethane foam production field, especially in a kind of raw material mixing device for rigid polyurethane foam production. BACKGROUND

[0002] As a kind of excellent performance high molecular material, rigid polyurethane foam has wide application in many fields such as building insulation, refrigeration equipment, automotive interior, its excellent heat insulation, sound insulation, strength and other performances make it become one of the preferred materials in many industries, in the production process of rigid polyurethane foam, the mixing of raw materials is a crucial link, and the uniformity of raw material mixing directly affects the quality and performance of final product.

[0003] At present, the raw material mixing device for rigid polyurethane foam production in the prior art has the following disadvantages in practical application: the stirring mode of traditional mixing device is relatively single, usually only relies on simple stirring paddle for stirring, cannot realize omnibearing, multi-angle stirring of raw materials, leading to difficulty in fully mixing and uniformity of raw materials during mixing process, especially for some raw materials with large viscosity or large density difference, the limitation of this single stirring mode is more prominent, local mixing is not sufficient, which affects the product quality of rigid polyurethane foam and makes its performance unstable, secondly, the traditional mixing device often lacks effective lifting structure, raw materials are prone to accumulate at the bottom of mixing box and cannot be lifted in time and participate in sufficient mixing process, which not only reduces mixing efficiency, but also may cause problems such as deterioration or incomplete reaction of raw materials due to long-time residence at the bottom. UTILITY MODEL CONTENT

[0004] The utility model mainly aims at providing a raw material mixing device for rigid polyurethane foam production, which can effectively solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the utility model is as follows:

[0006] A raw material mixing device for rigid polyurethane foam production, comprising a mixing box, a feed pipe is fixedly connected to the outer side of the mixing box, a feed hopper is fixedly connected to the upper end of the feed pipe, four groups of stirring assemblies are arranged in the inner cavity of the mixing box, a lifting assembly is arranged on the side close to the four groups of stirring assemblies, a material collecting hopper is fixedly connected to the lower end of the mixing box, a discharge pipe is fixedly connected to the lower end of the material collecting hopper, four bottom legs are fixedly installed on the lower end of the material collecting hopper in circumferential direction, and the four bottom legs are arranged on the outer side of the discharge pipe.

[0007] Preferably, the lifting assembly includes a rotating shaft, which is rotatably connected to the mixing chamber. The upper end of the rotating shaft is fixedly connected to the output end of a drive motor. Spiral blades are spirally wound on the outer side of the rotating shaft. A lifting barrel is provided on the outer side of the spiral blades. A support leg is fixedly connected to the lower end of the lifting barrel. The support leg is fixedly connected to the inner wall of the mixing chamber.

[0008] Preferably, the stirring assembly includes a stirring shaft, which is rotatably connected to the upper end of the mixing chamber, and the lower end of the stirring shaft is rotatably connected to a support leg. Multiple stirring rods are fixedly connected to the outer side of the stirring shaft, and the multiple stirring rods are all located in the inner cavity of the mixing chamber.

[0009] Preferably, a main gear is fixedly connected to the outer side of the output end of the drive motor, the main gear is located on the outer side of the mixing box, and a driven gear is fixedly connected to the outer side of each of the four stirring shafts, the four driven gears are located on the outer side of the mixing box, and the four driven gears are meshed on the outer side of the main gear.

[0010] Preferably, the upper end of the mixing box is fixedly connected to four support legs, the height of the support legs is higher than the height of the stirring shaft, and the upper ends of the four support legs are fixedly connected to a support plate, and the drive motor is installed on the upper end of the support plate.

[0011] Preferably, a mounting block is fixedly connected to the outside of the drive motor, and the drive motor is fixedly mounted on the upper end of the support plate through the mounting block.

[0012] Preferably, a control valve is fixedly installed on the outside of the discharge pipe, and the control valve is located in the middle of the discharge pipe.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This is a raw material mixing device for rigid polyurethane foam production. The output end of the drive motor drives the rotating shaft to rotate. The rotation of the rotating shaft causes the spiral blades to rotate as well. At this time, the lifting tank is designed on the outside of the spiral blades, which can lift the heavier raw materials at the bottom of the mixing box upwards, so that the raw materials at the bottom can participate in the mixing process in time, increasing the circulation of raw materials and further improving the mixing efficiency.

[0015] 2. This raw material mixing device for rigid polyurethane foam production, when the drive motor starts, the output end of the drive motor will also drive the main gear to rotate. Through the four driven gears meshing on the outside of the main gear, the four stirring shafts can easily drive the corresponding multiple stirring rods to stir the raw materials in the mixing chamber, so that the raw materials are fully mixed. Attached Figure Description

[0016] Figure 1 It is overall structure schematic view of the raw material mixing device for rigid polyurethane foam production of the utility model;

[0017] Figure 2 It is overall structure sectional view of the raw material mixing device for rigid polyurethane foam production of the utility model;

[0018] Figure 3 It is partial structure schematic of the raw material mixing device for rigid polyurethane foam production of the utility model Figure 1 ;

[0019] Figure 4 It is partial structure schematic of the raw material mixing device for rigid polyurethane foam production of the utility model Figure 2 ;

[0020] Figure 5 It is A place amplification structure schematic of the raw material mixing device for rigid polyurethane foam production of the utility model.

[0021] In the drawing: 1, mixing box;2, feed pipe;3, feed hopper;4, material collecting hopper;5, discharge pipe;6, control valve;7, bottom leg;8, driving motor;9, mounting block;10, support plate;11, support leg;12, rotating shaft;13, main gear;14, from the gear;15, stirring shaft;16, stirring rod;17, support leg;18, lifting bucket;19, spiral blade. Specific implementation

[0022] In order to make the technical means, creation features, purposes and effects realized by the utility model easy to understand, the utility model is further described below in combination with specific implementation manners.

[0023] As Figures 1-5 shown, a raw material mixing device for rigid polyurethane foam production, including mixing box 1, the outer side of mixing box 1 is fixedly connected with feed pipe 2, the upper end of feed pipe 2 is fixedly connected with feed hopper 3, the inner chamber of mixing box 1 is provided with four groups of stirring assemblies, the side close to four groups of stirring assemblies is provided with lifting assembly, the lower end of mixing box 1 is fixedly connected with material collecting hopper 4, the lower end of material collecting hopper 4 is fixedly connected with discharge pipe 5, the lower end of material collecting hopper 4 is fixedly installed with four bottom legs 7 along the circumferential direction, four bottom legs 7 are all arranged on the outer side of discharge pipe 5.

[0024] In the embodiment, the lifting assembly includes rotating shaft 12, rotating shaft 12 is rotatably connected with mixing box 1, the upper end of rotating shaft 12 is fixedly connected with the output end of driving motor 8, the outer side of rotating shaft 12 is spirally wound with spiral blade 19, the outer side of spiral blade 19 is provided with lifting bucket 18, the lower end of lifting bucket 18 is fixedly connected with support leg 17, support leg 17 is fixedly connected with the inner wall of mixing box 1.

[0025] Specifically, first, the raw materials to be mixed are poured into the feeding hopper 3, and the raw materials will enter the mixing box 1 along the feeding pipe 2. At this time, the driving motor 8 is started, and the output end of the driving motor 8 drives the rotating shaft 12 to rotate. The rotating shaft 12 rotates to drive the spiral blade 19 to rotate. At this time, the lifting bucket 18 designed on the outside of the spiral blade 19 can lift the raw materials with large specific gravity at the bottom of the mixing box 1 upwards to complete the lifting operation, thereby improving the uniformity of the mixing.

[0026] In this embodiment, the stirring assembly includes a stirring shaft 15, the stirring shaft 15 is rotatably connected to the upper end of the mixing box 1, the lower end of the stirring shaft 15 is rotatably connected to the support leg 17, and a plurality of stirring rods 16 are fixedly connected to the outside of the stirring shaft 15. The plurality of stirring rods 16 are arranged in the inner cavity of the mixing box 1. The output end of the driving motor 8 is fixedly connected with a main gear 13, and the main gear 13 is arranged on the outside of the mixing box 1. Four from gears 14 are fixedly connected to the outside of the four stirring shafts 15, and the four from gears 14 are arranged on the outside of the mixing box 1 and engaged with the outside of the main gear 13.

[0027] Specifically, when the driving motor 8 is started, the output end of the driving motor 8 also drives the main gear 13 to rotate. The four from gears 14 engaged with the outside of the main gear 13 can conveniently drive the corresponding plurality of stirring rods 16 to stir the raw materials in the inner cavity of the mixing box 1, so that the raw materials are fully mixed.

[0028] In this embodiment, the upper end of the mixing box 1 is fixedly connected with four support legs 11, the height of the support legs 11 is higher than the height of the stirring shaft 15, and the upper ends of the four support legs 11 are fixedly connected with a support plate 10. The driving motor 8 is installed at the upper end of the support plate 10. The driving motor 8 is fixedly installed at the upper end of the support plate 10 through the installation block 9.

[0029] Specifically, the height of the four support legs 11 is higher than the height of the stirring shaft 15, which can ensure the stable installation and operation of the driving motor 8.

[0030] In this embodiment, the control valve 6 is fixedly installed on the outside of the discharge pipe 5, and the control valve 6 is arranged at the middle position of the discharge pipe 5.

[0031] Specifically, the collected materials at the lower end of the mixing box 1 are collected through the control valve 6, and the mixed raw materials can flow out of the discharge pipe 5.

[0032] It needs to be explained that the utility model discloses a raw material mixing device for rigid polyurethane foam production, and the user first pours the raw material to be mixed into the feeding hopper 3, the raw material enters the mixing box 1 along the feeding pipe 2, at this time, the driving motor 8 is started, the output end of the driving motor 8 drives the rotating shaft 12 to rotate, the spiral blade 19 can also rotate through the rotation of the rotating shaft 12, at this time, the lifting barrel 18 is designed on the outer side of the spiral blade 19, the raw material with large specific gravity at the bottom of the mixing box 1 can be lifted upwards, the lifting operation is completed, the uniformity of mixing can be improved, and at the same time when the driving motor 8 is started, the output end of the driving motor 8 also drives the main gear 13 to rotate, the four from gears 14 are engaged on the outer side of the main gear 13, so that the four stirring shafts 15 can conveniently drive the corresponding multiple stirring rods 16 to stir the raw material in the inner cavity of the mixing box 1, so that the raw material is fully mixed, at this time, the raw material is collected through the collecting hopper 4 at the lower end of the mixing box 1, and the mixed raw material can flow out from the discharge pipe 5 through the control of the control valve 6, so that the utility model is more practical.

[0033] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and the description in the specification only illustrate the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The protection scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A raw material mixing device for rigid polyurethane foam production, comprising a mixing tank (1), characterized in that: The outer side of the mixing box (1) is fixedly connected with a feeding pipe (2), the upper end of the feeding pipe (2) is fixedly connected with a feeding hopper (3), the inner cavity of the mixing box (1) is provided with four groups of stirring assemblies, the side close to the four groups of stirring assemblies is provided with a lifting assembly, the lower end of the mixing box (1) is fixedly connected with a collecting hopper (4), the lower end of the collecting hopper (4) is fixedly connected with a discharging pipe (5), the lower end of the collecting hopper (4) is fixedly installed with four bottom legs (7) in the circumferential direction, and the four bottom legs (7) are all arranged on the outer side of the discharging pipe (5).

2. The raw material mixing device for producing rigid polyurethane foam according to claim 1, characterized by: The lifting assembly comprises a rotating shaft (12), the rotating shaft (12) is rotatably connected with the mixing box (1), the upper end of the rotating shaft (12) is fixedly connected with the output end of a driving motor (8), the outer side of the rotating shaft (12) is spirally wound with a spiral blade (19), the outer side of the spiral blade (19) is provided with a lifting bucket (18), the lower end of the lifting bucket (18) is fixedly connected with a supporting leg (17), and the supporting leg (17) is fixedly connected with the inner wall of the mixing box (1).

3. A raw material mixing device for producing rigid polyurethane foam according to claim 2, characterized in that: The stirring assembly comprises a stirring shaft (15), the stirring shaft (15) is rotatably connected with the upper end of the mixing box (1), the lower end of the stirring shaft (15) is rotatably connected with the supporting leg (17), and the outer side of the stirring shaft (15) is fixedly connected with a plurality of stirring rods (16), and the plurality of stirring rods (16) are all arranged in the inner cavity of the mixing box (1).

4. The raw material mixing device for producing rigid polyurethane foam according to claim 3, characterized by: The output end of the driving motor (8) is fixedly connected with a main gear (13), the main gear (13) is arranged on the outer side of the mixing box (1), the outer side of the four stirring shafts (15) is fixedly connected with a driven gear (14), the four driven gears (14) are all arranged on the outer side of the mixing box (1), and the four driven gears (14) are all meshed on the outer side of the main gear (13).

5. A raw material mixing device for producing rigid polyurethane foam according to claim 4, characterized in that: The upper end of the mixing box (1) is fixedly connected with four supporting legs (11), the height of the supporting leg (11) is higher than the height of the stirring shaft (15), the upper ends of the four supporting legs (11) are fixedly connected with a supporting plate (10), and the driving motor (8) is installed on the upper end of the supporting plate (10).

6. A raw material mixing device for producing rigid polyurethane foam according to claim 5, characterized in that: The outer side of the driving motor (8) is fixedly connected with a mounting block (9), and the driving motor (8) is fixedly installed on the upper end of the supporting plate (10) through the mounting block (9).

7. The raw material mixing device for producing rigid polyurethane foam according to claim 1, characterized by: The outer side of the discharging pipe (5) is fixedly installed with a control valve (6), and the control valve (6) is arranged at the middle position of the discharging pipe (5).

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