A melting apparatus for polyurethane raw material production

Abstract

The utility model relates to polyurethane raw material production field, concretely to a kind of melting equipment of polyurethane raw material production, including for the adaptive stirring of polyurethane raw material Follow-up stirring mechanism and for the adjustment of bottom material with Follow-up stirring mechanism to cooperate bottom adjustment mechanism, stirring drum is slidably arranged on the heating base of heating mechanism, power mechanism is arranged on the upside of stirring drum, the shaft bottom of power mechanism is connected with Follow-up stirring mechanism, the bottom of Follow-up stirring mechanism is connected with bottom adjustment mechanism.The utility model can change state adaptively through the middle supporting spring when stirring, mixing and heating in the three states of polyurethane raw material melting process, so that the raw material in different states can be effectively heat exchanged in time, thereby improving the efficiency of melting and avoiding raw material overheating damage.

Description

Technical Field

[0001] This utility model relates to the field of polyurethane raw material production, and in particular to a melting device for polyurethane raw material production. Background Technology

[0002] Melting equipment commonly used in polyurethane raw material production is a type of device whose core functions are precise temperature control and uniform heat transfer. Its purpose is to convert solid raw materials at room temperature into a liquid state while preventing the raw materials from decomposing due to overheating. Common types include jacketed heating kettles, spiral melters, and vacuum melting kettles. These devices ensure the stable conversion of solid raw materials into a liquid state by controlling the heating temperature and optimizing the heat transfer method, meeting the requirements for uniform mixing and reaction in subsequent polyurethane synthesis.

[0003] In the prior art, compared with the Chinese utility model with announcement number CN221677731U, a melting device for the production of polyurethane raw materials is disclosed. It uses two rotating scrapers to clean the polyurethane raw materials adhering to the inner wall of the melting tank. However, it has been found in the use of such equipment that, due to the inherent characteristics of polyurethane raw materials, they need to go through changes in non-sticky granular, high-viscosity gel, and low-viscosity liquid states. A simple stirring structure cannot handle multiple states. In particular, when going through high-viscosity gel states, stratification often occurs, which affects the processing. Utility Model Content

[0004] The purpose of this invention is to provide a melting device for the production of polyurethane raw materials in order to solve the above-mentioned problems.

[0005] This utility model achieves the above objectives through the following technical solutions: A melting device for producing polyurethane raw materials includes a heating mechanism for providing a heat source and a power mechanism for providing power. The power mechanism is mounted on the heating mechanism via a lifting mechanism. The device also includes a follow-up stirring mechanism for adaptively stirring the polyurethane raw materials and a bottom adjustment mechanism for adjusting the raw materials at the bottom in coordination with the follow-up stirring mechanism. The stirring drum is slidably disposed on the heating base of the heating mechanism. The power mechanism is disposed on the upper side of the stirring drum. The bottom of the rotating shaft of the power mechanism is connected to the follow-up stirring mechanism, and the bottom of the follow-up stirring mechanism is connected to the bottom adjustment mechanism. The lifting mechanism has a motor installed at the rear of the lifting seat. The bottom of the lifting seat is connected to a sealing cover via a connecting seat. The output end of the motor is connected to the splined shaft of the follower stirring mechanism via a rotating shaft. The follower stirring mechanism also includes bottom stirring blades, which are installed at the bottom of the splined shaft. Two slide cylinders slide downwards on the splined shaft, and a support spring is provided between the two slide cylinders. An upper spiral stirring blade is welded to the upper slide cylinder, and a lower spiral stirring blade is welded to the lower slide cylinder.

[0006] Preferably, the bottom adjustment mechanism includes a pressure block, which is slidably disposed below the bottom stirring blades, and a pressure shaft is disposed at the bottom of the slide cylinder. The pressure block is slidably connected to the pressure shaft via a spline inside. A return spring is disposed on the lower side of the pressure block outside the pressure shaft, and a top head is disposed at the bottom of the pressure shaft.

[0007] Preferably, the upper spiral stirring blade and the lower spiral stirring blade are conical spiral blades that are wider at the top and narrower at the bottom.

[0008] Preferably, the top head has a hemispherical structure, and the reset spring is provided with a telescopic rubber sleeve on the outside.

[0009] Preferably, the bottom stirring blade is a fan-shaped stirring blade, and the stirring direction is consistent with the stirring direction of the upper spiral stirring blade and the lower spiral stirring blade.

[0010] Preferably, the lifting mechanism further includes a lifting assembly and a column, the lifting seat is slidably connected to the column, the lifting assembly is a hydraulic cylinder assembly, and the rear end of the lifting seat is connected to the piston rod of the hydraulic cylinder via a pin.

[0011] Preferably, the bottom of the lifting assembly is connected to the bracket of the heating mechanism, the heating base has a groove formed on it for the universal wheels to pass through, and the front end of the heating base has a chamfered structure.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: With double-layered upper and lower spiral stirring blades, the polyurethane raw material is stirred, mixed, and heated in three states during the melting process. The intermediate support spring can adapt to the state changes, thereby enabling timely and effective heat exchange between the raw materials in different states. This improves melting efficiency and prevents the raw materials from overheating and being damaged. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of a melting device for producing polyurethane raw materials according to the present invention; Figure 2 This is a schematic diagram of the follow-up stirring mechanism of the melting equipment for producing polyurethane raw materials according to this utility model; Figure 3 This is a schematic diagram of the stirring structure of a melting device for producing polyurethane raw materials according to the present invention, which is used to stir the gel-like state. Figure 4 This is a schematic diagram of the stirring structure of a melting device for producing polyurethane raw materials according to the present invention; Figure 5 This is a partial structural diagram of the upper and lower spiral stirring blades of the melting equipment for producing polyurethane raw materials according to the present invention. Figure 6 This is a schematic diagram of the bottom adjustment mechanism of a melting device for producing polyurethane raw materials according to the present invention.

[0015] The annotations in the attached figures are explained as follows: 1. Heating mechanism; 2. Lifting mechanism; 3. Power mechanism; 4. Follow-up stirring mechanism; 5. Stirring drum; 6. Bottom adjustment mechanism; 11. Support; 12. Heating base; 13. Control cabinet; 21. Lifting assembly; 22. Column; 23. Lifting seat; 31. Motor; 32. Connecting seat; 33. Rotating shaft; 41. Splined shaft; 42. Bottom stirring blade; 43. Slide drum; 44. Upper spiral stirring blade; 45. Lower spiral stirring blade; 46. Support spring; 61. Pressure block; 62. Top head; 63. Pressure shaft; 64. Spline; 65. Return spring. Detailed Implementation

[0016] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] The present invention will be further described below with reference to the accompanying drawings: like Figures 1-6 As shown, a melting device for producing polyurethane raw materials includes a heating mechanism 1 for providing a heat source and a power mechanism 3 for providing power. The power mechanism 3 is mounted on the heating mechanism 1 via a lifting mechanism 2. The device also includes a follow-up stirring mechanism 4 for adaptively stirring the polyurethane raw materials and a bottom adjustment mechanism 6 for adjusting the bottom raw materials in coordination with the follow-up stirring mechanism 4. The stirring drum 5 is slidably disposed on the heating base 12 of the heating mechanism 1. The power mechanism 3 is disposed on the upper side of the stirring drum 5. The bottom of the rotating shaft 33 of the power mechanism 3 is connected to the follow-up stirring mechanism 4, and the bottom of the follow-up stirring mechanism 4 is connected to the bottom adjustment mechanism 6. The lifting seat 23 of the lifting mechanism 2 is equipped with a motor 31 of the power mechanism 3 at its tail. The bottom of the lifting seat 23 is connected to a sealing cover via a connecting seat 32. The output end of the motor 31 is connected to the splined shaft 41 of the follower stirring mechanism 4 via a rotating shaft 33. The follower stirring mechanism 4 also includes a bottom stirring blade 42, which is installed at the bottom of the splined shaft 41. Two slide cylinders 43 are slidably connected downward on the splined shaft 41. A support spring 46 is provided between the two slide cylinders 43. An upper spiral stirring blade 44 is welded to the upper slide cylinder 43, and a lower spiral stirring blade 45 is welded to the lower slide cylinder 43.

[0019] In this embodiment, the bottom adjustment mechanism 6 includes a pressure block 61, which is slidably disposed below the bottom stirring blade 42. The pressure shaft 63 is disposed at the bottom of the slide cylinder 43. The pressure block 61 is slidably connected to the pressure shaft 63 through a spline 64. A return spring 65 is disposed on the lower side of the pressure block 61 outside the pressure shaft 63. A top head 62 is disposed at the bottom of the pressure shaft 63.

[0020] In this embodiment, the upper spiral stirring blade 44 and the lower spiral stirring blade 45 are conical spiral blades that are wider at the top and narrower at the bottom. When stirring, this avoids the situation where some parts accumulate and cause greater resistance. The conical structure allows for release in the middle.

[0021] In this embodiment, the top head 62 has a hemispherical structure, and the return spring 65 is provided with a telescopic rubber sleeve to reduce friction at the bottom of the top head 62.

[0022] In this embodiment, the bottom stirring blade 42 is a fan-shaped stirring blade, and the stirring direction is the same as that of the upper spiral stirring blade 44 and the lower spiral stirring blade 45.

[0023] In this embodiment, the lifting mechanism 2 also includes a lifting assembly 21 and a column 22. The lifting seat 23 is slidably connected to the column 22. The lifting assembly 21 is a hydraulic cylinder assembly. The rear end of the lifting seat 23 is connected to the piston rod of the hydraulic cylinder through a pin.

[0024] In this embodiment, the bottom of the lifting component 21 is connected to the bracket 11 of the heating mechanism 1, the heating base 12 has a groove for the universal wheel to pass through, and the front end of the heating base 12 has a chamfered structure.

[0025] Working principle: The polyurethane raw material that needs to be heated and melted is poured into the mixing drum 5, and then the mixing drum 5 is pushed to the lower side of the follow-up mixing mechanism 4, that is, the upper end of the heating base 12. The lifting component 21 is controlled to extend and retract, driving the power mechanism 3 and the follow-up mixing mechanism 4 to descend, in preparation for heating and melting the raw material. In the first stage, since the polyurethane raw material is molten and in granular form, the mutual adhesion between the granules is relatively small. Therefore, the spline shaft 41 is controlled to rotate in both directions to stir the granular raw material in multiple directions and improve the heat exchange at the bottom. In the second stage, the particles gradually melt, and the molten raw materials become sticky with each other. At this time, the spline shaft 41 is controlled to rotate clockwise, so that the rotation direction of the upper spiral stirring blade 44 and the lower spiral stirring blade 45 is to compress the raw materials downwards and then move them upwards from the outside. Figure 3 As shown, due to resistance and viscous circularity, the upper spiral stirring blade 44 at the top will be subjected to reverse extrusion force when extruding and transmitting the raw material. The upper spiral stirring blade 44 will then press the support spring 46 downward, so that both the upper spiral stirring blade 44 and the lower spiral stirring blade 45 are located at the bottom. At this time, because the pressure at the upper end is large, the pressure block 61 is squeezed and the pressure block 61 is disengaged from the spline 64. The bottom stirring blade 42 will not rotate, further separating the extruded molten raw material. In the third stage, the raw materials gradually melt into a liquid state. At this time, the splined shaft 41 is reversed to transport the hotter liquid at the bottom upwards. The lower spiral stirring blades 45 encounter resistance and gradually become... Figure 4 In this state, it is easier to transfer heat from the bottom upwards, improving the subsequent melting effect.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A melting device for producing polyurethane raw materials, comprising a heating mechanism (1) for providing a heat source and a power mechanism (3) for providing power, wherein the power mechanism (3) is mounted on the heating mechanism (1) via a lifting mechanism (2), characterized in that: It also includes a follow-up stirring mechanism (4) for adaptive stirring of polyurethane raw materials and a bottom adjustment mechanism (6) for adjusting the bottom raw materials in conjunction with the follow-up stirring mechanism (4). The stirring drum (5) is slidably disposed on the heating base (12) of the heating mechanism (1). The power mechanism (3) is disposed on the upper side of the stirring drum (5). The bottom of the rotating shaft (33) of the power mechanism (3) is connected to the follow-up stirring mechanism (4). The bottom of the follow-up stirring mechanism (4) is connected to the bottom of the bottom adjustment mechanism (6). The lifting mechanism (2) has a motor (31) of the power mechanism (3) installed at the tail of the lifting seat (23). The bottom of the lifting seat (23) is connected to a sealing cover through a connecting seat (32). The output end of the motor (31) is connected to the spline shaft (41) of the follow-up stirring mechanism (4) through a rotating shaft (33). The follow-up stirring mechanism (4) also includes a bottom stirring blade (42). The bottom stirring blade (42) is installed at the bottom of the spline shaft (41). Two slide cylinders (43) are slidably connected downward on the spline shaft (41). A support spring (46) is provided between the two slide cylinders (43). An upper spiral stirring blade (44) is welded on the upper slide cylinder (43), and a lower spiral stirring blade (45) is welded on the lower slide cylinder (43).

2. The melting equipment for producing polyurethane raw materials according to claim 1, characterized in that: The bottom adjustment mechanism (6) includes a pressure block (61), which is slidably disposed under the bottom stirring blade (42). A pressure shaft (63) is disposed at the bottom of the slide cylinder (43). The pressure block (61) is slidably connected to the pressure shaft (63) through a spline (64). A return spring (65) is disposed on the lower side of the pressure block (61) outside the pressure shaft (63). A top head (62) is disposed at the bottom of the pressure shaft (63).

3. The melting equipment for producing polyurethane raw materials according to claim 2, characterized in that: The upper spiral stirring blade (44) and the lower spiral stirring blade (45) are conical spiral blades that are wider at the top and narrower at the bottom.

4. The melting equipment for producing polyurethane raw materials according to claim 2, characterized in that: The top head (62) has a hemispherical structure, and the return spring (65) is provided with a telescopic rubber sleeve on the outside.

5. The melting equipment for producing polyurethane raw materials according to claim 3, characterized in that: The bottom stirring blade (42) is a fan-shaped stirring blade, and the stirring direction is the same as that of the upper spiral stirring blade (44) and the lower spiral stirring blade (45).

6. The melting equipment for producing polyurethane raw materials according to claim 1, characterized in that: The lifting mechanism (2) also includes a lifting assembly (21) and a column (22). The lifting seat (23) is slidably connected to the column (22). The lifting assembly (21) is a hydraulic cylinder assembly. The rear end of the lifting seat (23) is connected to the piston rod of the hydraulic cylinder through a pin.

7. The melting equipment for producing polyurethane raw materials according to claim 6, characterized in that: The bottom of the lifting assembly (21) is connected to the bracket (11) of the heating mechanism (1), and the heating base (12) has a groove for the universal wheel to pass through. The front end of the heating base (12) has a chamfered structure.

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