Polyurethane reaction kettle

Abstract

The utility model belongs to the technical field of polyurethane production equipment, and particularly relates to a polyurethane reaction kettle, which comprises a kettle body provided with a feed port and a discharge port; the stirring motor is arranged at the top of the kettle body; the stirring shafts are arranged in the kettle body, and stirring rods are arranged on the stirring shafts; the transmission part is arranged at the top end in the kettle body; the pressure relief pipe is arranged on the kettle body, and a pressure relief valve is arranged on the pressure relief pipe in series; wherein the plurality of stirring shafts are in transmission connection with the stirring motor through the transmission part, the stirring shafts can rotate around the axes of the stirring shafts, the plurality of stirring shafts can rotate around the axis of the kettle body, and compared with the prior art, the polyurethane reaction kettle disclosed by the utility model has the advantages that the mixing uniformity of polyurethane and the use safety of the polyurethane reaction kettle are effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of polyurethane production equipment, and particularly relates to a polyurethane reaction kettle. Background Art

[0002] Polyurethane (PU), whose full name is polycarbamate, is a polymer material formed by the polycondensation reaction of polyols and polyisocyanates and has excellent mechanical properties. It has extremely strong plasticity and is widely used. In the production process of polyurethane, a reaction kettle is usually required for production and processing. For example, a multi-axis stirred waterborne polyurethane reaction kettle with staggered stirring disks disclosed in the patent with the application number CN201711343085.3 includes a tank body and a stirring shaft. Stirring disks are fixedly installed on the stirring shaft, the stirring shaft is fixedly installed in the tank body, at least two stirring shafts are fixedly installed in the tank body, at least two stirring disks are fixedly installed on the stirring shaft, the stirring shafts are evenly distributed and installed in the tank body, and the installation positions of the stirring disks installed on each stirring shaft in the tank body are staggered;

[0003] This existing polyurethane reaction kettle stirs through multiple shafts to improve the mixing uniformity of polyurethane. However, each stirring shaft can only rotate around its own axis, and there are still dead corners in the reaction kettle where stirring is insufficient. Moreover, the existing polyurethane reaction kettle lacks safety protection measures, and it is easy to bring huge safety hazards when high pressure appears in the reaction kettle. Therefore, it is necessary to make improvements. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a polyurethane reaction kettle aiming at the above existing technical problems, so as to improve the mixing uniformity of polyurethane and the use safety of the polyurethane reaction kettle.

[0005] In view of this, the utility model provides a polyurethane reaction kettle, including:

[0006] A kettle body, on which a feed inlet and a discharge outlet are provided;

[0007] A stirring motor, which is arranged on the top of the kettle body;

[0008] It further includes:

[0009] A plurality of stirring shafts, which are arranged in the kettle body, and stirring rods are arranged on the stirring shafts;

[0010] A transmission part, which is arranged at the top end inside the kettle body;

[0011] A pressure relief pipe, which is arranged on the kettle body, and a pressure relief valve is serially arranged on the pressure relief pipe;

[0012] Among them, several stirring shafts are drivingly connected to a stirring motor through a transmission part. The stirring shafts can rotate around their own axes, and several stirring shafts can rotate around the axis of the kettle body.

[0013] In this technical solution, during the production process of polyurethane, the polyurethane raw materials are input into the reaction kettle through the feed inlet of the reaction kettle. Then, the reaction kettle is closed, and the stirring motor is started. The stirring motor drives the stirring shafts to rotate through the transmission part. Under the action of the transmission part, the stirring shafts rotate around their own axes to stir and mix the polyurethane raw materials. At the same time, several stirring shafts rotate around the axis of the kettle body to stir and mix the polyurethane raw materials, realizing the rotation of the stirring shafts around their own axes and the revolution of several stirring shafts, thereby effectively improving the mixing uniformity of polyurethane, reducing the stirring dead corners. At the same time, when the pressure in the reaction kettle is too high, the pressure can be discharged through the pressure relief pipe, reducing the safety hazards during the production process of polyurethane. Compared with the prior art, the utility model effectively improves the mixing uniformity of polyurethane and the use safety of the polyurethane reaction kettle.

[0014] In the above technical solution, further, the transmission part further includes:

[0015] A transmission disc, which is rotatably arranged at the top inside the kettle body. A circular groove is provided at the bottom of the transmission disc, and an internal gear ring is provided on the side wall of the circular groove;

[0016] A central gear, which is rotatably arranged at the center of the circular groove;

[0017] A plurality of planetary pinions, which are rotatably arranged in the circular groove. The plurality of planetary pinions are evenly spaced along the circumference of the central gear;

[0018] Among them, the central gear is connected to the driving end of the stirring motor, the planetary pinions are respectively meshed with the central gear and the internal gear ring, and several stirring shafts are respectively connected to several planetary pinions.

[0019] In the above technical solution, further, the pressure relief pipe further includes:

[0020] A buffer plate, which is arranged in the pressure relief pipe and on the pressure relief side of the pressure relief valve;

[0021] A plurality of through holes, which are evenly distributed on the buffer plate. The through holes axially penetrate the buffer plate along the axis of the buffer plate, and the through holes extend in a wavy shape along the axis of the buffer plate.

[0022] In the above technical solution, further, the pressure relief pipe further includes:

[0023] A guide groove, which includes an upper guide groove and a lower guide groove symmetrically arranged on the upper and lower inner walls of the pressure relief pipe;

[0024] A guiding slider, which is arranged on the outer side wall of the buffer plate;

[0025] An extension part, which is arranged outside the pressure relief pipe, and an inner cavity is arranged in the extension part;

[0026] A follower rack, which is movably arranged in the inner cavity and can move along the axial direction of the pressure relief pipe;

[0027] A transmission gear, which is rotatably arranged in the inner cavity and meshes with the follower rack;

[0028] A friction buffer part, which is arranged on one side of the extension part for buffering the pressure relief impact through friction;

[0029] Wherein, the guiding slider is movably matched with the guiding groove, the upper guiding groove is communicated with the inner cavity, the bottom of the follower rack is connected with the guiding slider, and the transmission gear is in transmission connection with the friction buffer part through a transmission shaft.

[0030] In the above technical solution, further, the friction buffer part further includes:

[0031] A housing, which is arranged on one side of the extension part, a friction cavity is arranged in the housing, and a friction layer is arranged on the inner wall of the friction cavity;

[0032] A rotating shaft, which is rotatably arranged in the friction cavity, and a plurality of connecting rods are arranged on the rotating shaft;

[0033] A friction block, which is arranged at the outer end of the connecting rod;

[0034] A spring piece, which is arranged in the friction cavity;

[0035] Wherein, the rotating shaft is connected with the transmission shaft, the outer surface of the friction block contacts with the friction layer, and the spring piece can contract and deform with the rotation of the transmission shaft.

[0036] The beneficial effects of the utility model are:

[0037] 1. Through the setting of the transmission part, the self-rotation of the stirring shaft and the revolution of a plurality of stirring shafts are realized, thereby effectively improving the mixing uniformity of the polyurethane and reducing the stirring dead angle;

[0038] 2. Through the setting of the buffer plate, the impact of the high-pressure gas flow on the pressure relief pipeline during the pressure relief process can be effectively reduced, and the impact damage of the pressure relief pipeline can be prevented;

[0039] 3. Through the setting of the friction buffer part, the impact force is converted into friction force, further reducing the impact on the pressure relief pipeline during the pressure relief process and preventing the impact damage of the pressure relief pipeline. Description of the Drawings

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0041] Figure 1 It is a schematic structural diagram of the specific embodiment of the present invention.

[0042] Figure 2 It is a schematic structural diagram of several stirring shafts of the present invention.

[0043] Figure 3 It is a schematic structural diagram of the transmission part of the present invention.

[0044] Figure 4 It is a schematic structural diagram of the pressure relief pipe of the present invention.

[0045] Figure 5 It is a schematic structural diagram of the friction buffer part of the present invention.

[0046] The markings in the figure are shown as:

[0047] 1. Kettle body; 100. Feed inlet; 10️1. Discharge port; 2. Stirring motor; 3. Stirring shaft; 4. Transmission part; 40. Transmission disc; 41. Circular groove; 42. Inner gear ring; 43. Central gear; 44. Planet pinion; 5. Pressure relief pipe; 6. Pressure relief valve; 7. Buffer plate; 8. Through hole; 9. Upper guide groove; 10. Lower guide groove; 11. Extension part; 12. Inner cavity; 13. Follow-up rack; 14. Transmission gear; 15. Friction buffer part; 16. Transmission shaft; 17. Outer shell; 18. Friction cavity; 19. Friction layer; 20. Rotating shaft; 21. Connecting rod; 22. Friction block; 23. Spring piece. Specific embodiments

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0049] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments of the present application. For the convenience of description, the sizes of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0050] Embodiment 1:

[0051] An embodiment of the present application provides a polyurethane reactor, including: a reactor body 1, on which a feed inlet 100 and a discharge outlet 101 are provided; a stirring motor 2, which is arranged on the top of the reactor body 1;

[0052] It further includes: a plurality of stirring shafts 3, which are arranged in the reactor body 1, and stirring rods are arranged on the stirring shafts 3; a transmission part 4, which is arranged at the top end inside the reactor body 1; a pressure relief pipe 5, which is arranged on the reactor body 1, and a pressure relief valve 6 is connected in series on the pressure relief pipe 5;

[0053] Among them, the plurality of stirring shafts 3 are in transmission connection with the stirring motor 2 through the transmission part 4, the stirring shafts 3 can rotate around their own axes, and the plurality of stirring shafts 3 can rotate around the axis of the reactor body 1.

[0054] Moreover, the pressure relief pipe 5 can be connected to a conventional pressure relief pipe 5 path.

[0055] In this embodiment, during the production of polyurethane, the polyurethane raw materials are input into the reactor through the feed inlet 100 of the reactor. Then, the reactor is closed, and the stirring motor 2 is started. The stirring motor 2 drives the stirring shafts 3 to rotate through the transmission part 4. Under the action of the transmission part 4, the stirring shafts 3 rotate around their own axes to stir and mix the polyurethane raw materials. At the same time, the plurality of stirring shafts 3 rotate around the axis of the reactor body 1 to stir and mix the polyurethane raw materials, realizing the self-rotation of the stirring shafts 3 and the revolution of the plurality of stirring shafts 3, thereby effectively improving the mixing uniformity of the polyurethane, reducing the stirring dead angle. At the same time, when the pressure in the reactor is too high, the pressure can be discharged through the pressure relief pipe 5, reducing the safety hazards during the production of polyurethane. Compared with the prior art, the present utility model effectively improves the mixing uniformity of the polyurethane and the use safety of the polyurethane reactor.

[0056] Embodiment 2:

[0057] This embodiment provides a polyurethane reactor. In addition to including the technical solutions of the above embodiment, it also has the following technical features. The transmission part 4 further includes: a transmission disk 40, which is rotatably arranged at the top inside the kettle body 1. A circular groove 41 is provided at the bottom of the transmission disk 40, and an internal gear ring 42 is provided on the side wall of the circular groove 41; a central gear 43, which is rotatably arranged at the center of the circular groove 41; a plurality of planetary pinions 44, which are rotatably arranged in the circular groove 41, and the plurality of planetary pinions 44 are evenly spaced along the circumferential direction of the central gear 43.

[0058] Among them, the central gear 43 is connected to the driving end of the stirring motor 2, the planetary pinions 44 are respectively meshed with the central gear 43 and the internal gear ring 42, and a plurality of stirring shafts 3 are respectively connected to the plurality of planetary pinions 44.

[0059] Moreover, the transmission disk 40 can be connected to the top inside the kettle body 1 in a conventional manner. For example, an annular slider with a T-shaped cross-section is installed at the top of the transmission disk 40. The annular slider is concentric with the transmission disk 40. An annular sliding groove matching with the annular slider is opened at the top inside the kettle body 1. The transmission disk 40 is rotationally connected to the top inside the kettle body 1 through the cooperation of the annular slider and the annular sliding groove. The planetary pinions 44 are also rotationally connected to the circular groove 41 in a conventional manner.

[0060] In this embodiment, the stirring motor 2 drives the central gear 43 to rotate, and the plurality of planetary pinions 44 rotate along with the rotation of the central gear 43, so that the stirring shafts 3 connected to the planetary pinions 44 rotate around their own axes. At the same time, since the internal gear ring 42 on the transmission disk 40 is meshed with the planetary pinions 44, the transmission disk 40 rotates along with the rotation of the central gear 43, so that the plurality of stirring shafts 3 rotate around the axis of the kettle body 1. The polyurethane raw materials are stirred by the self-rotation of the stirring shafts 3 and the revolution of the plurality of stirring shafts 3, effectively improving the mixing uniformity of the polyurethane and reducing the stirring dead angle.

[0061] Embodiment 3:

[0062] This embodiment provides a polyurethane reactor. In addition to including the technical solutions of the above embodiment, it also has the following technical features. The pressure relief pipe 5 further includes: a buffer plate 7, which is arranged in the pressure relief pipe 5 and on the pressure relief side of the pressure relief valve 6; a plurality of through holes 8, which are evenly distributed on the buffer plate 7. The through holes 8 axially penetrate the buffer plate 7 along the axial direction of the buffer plate 7, and the through holes 8 extend in a wavy shape along the axial direction of the buffer plate 7.

[0063] In this embodiment, when the pressure in the reactor is too high, the pressure relief valve 6 opens, and the high-pressure airflow rushes into the pressure relief pipe 5. When the high-pressure airflow moves to the buffer plate 7, the high-pressure airflow moves to the pressure relief pipe 5 through a plurality of through holes 8. Since the through holes 8 extend in a wave-like shape along the axial direction of the buffer plate 7, they can block and disrupt the high-pressure airflow and absorb part of the impact of the high-pressure airflow, thereby preventing the pressure relief pipe 5 from being damaged by the impact of the high-pressure airflow.

[0064] Example 4:

[0065] This embodiment provides a polyurethane reactor. In addition to the technical solutions of the above embodiments, it also has the following technical features: the pressure relief pipe 5 further includes: a guide groove, which includes an upper guide groove 9 and a lower guide groove 10 symmetrically arranged at the upper and lower parts of the inner wall of the pressure relief pipe 5; a guide slider, which is arranged on the outer wall of the buffer plate 7; an extension portion 11, which is arranged on the outer side of the pressure relief pipe 5 and has an inner cavity 12; a follower rack 13, which is movably arranged in the inner cavity 12 and can move axially along the pressure relief pipe 5; a transmission gear 14, which is rotatably arranged in the inner cavity 12 and meshes with the follower rack 13; a friction buffer 15, which is arranged on one side of the extension portion 11 and is used to buffer the pressure relief impact through friction;

[0066] The guide slider is movably matched with the guide groove, the upper guide groove 9 is connected to the inner cavity 12, the bottom of the follower rack 13 is connected to the guide slider, and the transmission gear 14 is connected to the friction buffer part 15 through the transmission shaft 16.

[0067] The friction buffer portion 15 further includes: a housing 17, which is disposed on one side of the extension portion 11, a friction chamber 18 disposed within the housing 17, and a friction layer 19 disposed on the inner wall of the friction chamber 18; a rotating shaft 20, which is rotatably disposed in the friction chamber 18 and has a plurality of connecting rods 21 disposed on the rotating shaft 20; friction blocks 22, which are disposed at the outer ends of the connecting rods 21; and a spring leaf 23, which is disposed in the friction chamber 18.

[0068] The rotating shaft 20 is connected to the transmission shaft 16 , the outer surface of the friction block 22 is in contact with the friction layer 19 , and the spring sheet 23 can shrink and deform as the transmission shaft 16 rotates.

[0069] In this embodiment, when the high-pressure air flow impacts the buffer plate 7, the buffer plate 7 moves along the guiding groove under the impact of the high-pressure air flow. Since the follower rack 13 is connected to the guiding slider, the follower rack 13 moves simultaneously and drives the transmission gear 14 meshing with it to rotate. The transmission gear 14 rotates and drives the rotating shaft 20 to rotate through the transmission shaft 16. As the rotating shaft 20 rotates, the friction block 22 rotates and frictions with the friction layer 19 on the friction cavity 18, thereby buffering the impact generated by the high-pressure air flow through friction and finally converting it into heat energy to dissipate. At the same time, the spring piece 23 can further buffer the impact through deformation and can also keep the buffer plate 7 reset after the impact ends. Compared with the prior art, the utility model can effectively prevent the phenomenon that the pressure relief pipe 5 is damaged by the impact of the high-pressure air flow.

[0070] The embodiments of the present application are described above in conjunction with the accompanying drawings. Without conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection scope of the present application.

Claims

1. A polyurethane reaction kettle, comprising: A kettle body (1), on which a feed inlet (100) and a discharge outlet (101) are provided; A stirring motor (2), which is arranged on the top of the kettle body (1); It is characterized in that it further comprises: A plurality of stirring shafts (3), which are arranged in the kettle body (1), and stirring rods are arranged on the stirring shafts (3); A transmission part (4), which is arranged at the top end inside the kettle body (1); A pressure relief pipe (5), which is arranged on the kettle body (1), and a pressure relief valve (6) is serially arranged on the pressure relief pipe (5); Wherein, a plurality of stirring shafts (3) are in transmission connection with the stirring motor (2) through the transmission part (4), the stirring shafts (3) can rotate around their own axes, and a plurality of stirring shafts (3) can rotate around the axis of the kettle body (1).

2. A polyurethane reactor according to claim 1, characterized in that, The transmission part (4) further comprises: A transmission disc (40), which is rotatably arranged at the top inside the kettle body (1), a circular groove (41) is arranged at the bottom of the transmission disc (40), and an internal gear ring (42) is arranged on the side wall of the circular groove (41); A central gear (43), which is rotatably arranged at the center of the circular groove (41); A plurality of planetary pinions (44), and there are a plurality of planetary pinions (44) which are rotatably arranged in the circular groove (41), and a plurality of planetary pinions (44) are evenly spaced along the circumference of the central gear (43); Wherein, the central gear (43) is connected to the driving end of the stirring motor (2), the planetary pinions (44) are respectively meshed with the central gear (43) and the internal gear ring (42), and a plurality of stirring shafts (3) are respectively connected to a plurality of planetary pinions (44).

3. A polyurethane reactor according to claim 2, characterized in that, The pressure relief pipe (5) further comprises: A buffer plate (7), which is arranged in the pressure relief pipe (5) and on the pressure relief side of the pressure relief valve (6); A plurality of through holes (8), which are evenly distributed on the buffer plate (7), the through holes (8) axially penetrate through the buffer plate (7) along the axis of the buffer plate (7), and the through holes (8) extend in a wavy shape along the axis of the buffer plate (7).

4. The polyurethane reactor according to claim 3, characterized in that, The pressure relief pipe (5) further comprises: A guiding groove, which includes an upper guiding groove (9) and a lower guiding groove (10) symmetrically arranged on the upper and lower inner walls of the pressure relief pipe (5); A guiding slider, which is arranged on the outer side wall of the buffer plate (7); An extension part (11), which is arranged on the outer side of the pressure relief pipe (5), and an inner cavity (12) is arranged in the extension part (11); A follower rack (13), which is movably arranged in the inner cavity (12) and can move axially along the pressure relief pipe (5); A transmission gear (14), which is rotatably arranged in the inner cavity (12) and meshes with the follower rack (13); A friction buffer part (15), which is arranged on one side of the extension part (11) for buffering the pressure relief impact through friction; Among them, the guiding slider is movably matched with the guiding groove, the upper guiding groove (9) communicates with the inner cavity (12), the bottom of the follower rack (13) is connected to the guiding slider, and the transmission gear (14) is drivingly connected to the friction buffer part (15) through a transmission shaft (16).

5. A polyurethane reactor according to claim 4, characterized in that, The friction buffer part (15) further includes: a housing (17), the housing (17) is arranged on one side of the extension part (11), a friction cavity (18) is arranged inside the housing (17), and a friction layer (19) is arranged on the inner wall of the friction cavity (18); a rotating shaft (20), the rotating shaft (20) is rotatably arranged in the friction cavity (18), and a plurality of connecting rods (21) are arranged on the rotating shaft (20); friction blocks (22), the friction blocks (22) are arranged at the outer ends of the connecting rods (21); a spring piece (23), the spring piece (23) is arranged in the friction cavity (18); Among them, the rotating shaft (20) is connected to the transmission shaft (16), the outer surface of the friction block (22) contacts the friction layer (19), and the spring piece (23) can contract and deform as the transmission shaft (16) rotates.

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