Polylactic acid synthesis equipment

Abstract

The utility model relates to the technical field of polylactic acid synthesis, and discloses polylactic acid synthesis equipment which comprises a synthesis cylinder which is a cylinder with a hollow cavity and is arranged between symmetrical rectangular rods at the top of a rack; the shaking structure is arranged on the wall face of the rack and used for shaking the synthesis cylinder, the shaking structure comprises a rotating shaft, driving teeth, a swing rail and driven teeth, the rotating shaft is rotationally arranged behind the synthesis cylinder, the driving teeth are fixedly connected to the wall face of the rotating shaft, the swing rail is fixedly connected to the rear wall face of the synthesis cylinder, and the driven teeth are formed in the rear wall face of the swing rail; the driving teeth can be in threaded connection with the driven teeth, and when the shaking structure carries out synthesis of polylactic acid in the synthesis cylinder cavity, a manner of shaking the synthesis cylinder is matched with the stirring rod to stir the interior of the synthesis cylinder cavity, so that raw materials, a dehydrating agent and a catalyst in the synthesis cylinder cavity are subjected to a full fusion reaction, and the scheme has higher synthesis efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of polylactic acid synthesis, specifically, it relates to a polylactic acid synthesis device. Background Technology

[0002] Polylactic acid, also known as polylactide, is a novel bio-based and renewable biodegradable material.

[0003] Polylactic acid (PLA) is mainly synthesized through direct lactic acid polycondensation and lactide ring-opening polymerization. However, direct lactic acid polycondensation requires high-temperature synthesis of PLA, which is often static when synthesized with dehydrating agents and catalysts, resulting in low synthesis efficiency.

[0004] In view of this, this utility model is proposed. Utility Model Content

[0005] To address the aforementioned technical problem of low efficiency in the synthesis of conventional polylactic acid, the basic concept of the technical solution adopted in this utility model is as follows:

[0006] A polylactic acid synthesis apparatus, comprising:

[0007] The synthesis cylinder is a hollow cylinder with a cylindrical feed pipe installed at the top. A stirring motor is also fixedly connected to the center of the top of the synthesis cylinder. A solenoid valve for controlling the switch at the bottom of the synthesis cylinder is installed at the bottom of the synthesis cylinder.

[0008] The frame consists of a rectangular frame at the bottom and symmetrical rectangular bars at the top. The synthesis cylinder is positioned between the symmetrical rectangular bars at the top of the frame.

[0009] The swaying structure is set on the wall of the frame to sway the synthesis cylinder. The swaying structure includes: a rotating shaft, a drive gear, a swing rail, and a driven gear. The rotating shaft is rotatably located at the rear of the synthesis cylinder. The drive gear is fixedly connected to the wall of the rotating shaft. The swing rail is fixedly connected to the rear wall of the synthesis cylinder. The driven gear is opened on the rear wall of the swing rail. The drive gear can be threadedly connected to the driven gear.

[0010] In a preferred embodiment of this utility model, the rotating shaft is cylindrical, the driving teeth are threaded and are located on the arc surface of the rotating shaft, the swing rail is an arc-shaped rod, and the driven teeth are located on the arc surface of the rear wall of the swing rail.

[0011] In a preferred embodiment of this utility model, the swaying structure further includes a connecting shaft, a rear frame, a top plate, a servo motor, and a connecting block. The connecting shaft is symmetrically and fixedly connected to the two side walls of the synthesis cylinder. The rear frame is symmetrically and fixedly connected to the rear wall of each rectangular rod of the connecting shaft. The top plate is fixedly connected to the top of the symmetrical rear frame. The servo motor is fixedly connected to the top of the top plate. The rotating shaft is rotatably connected to the bottom of the top plate. The connecting block is fixedly connected to the rear wall of the synthesis cylinder. The rear wall of the connecting block can be fixedly connected to the front wall of the swing rail.

[0012] In a preferred embodiment of this utility model, the connecting shaft is cylindrical, and the connecting shaft on each side can pass through the frame wall. The rear frame is an L-shaped rod, and the top plate can drive the rotating shaft to rotate.

[0013] In a preferred embodiment of the present invention, a stirring shaft is rotatably connected inside the cavity of the synthesis cylinder. The stirring shaft is cylindrical and can be driven to rotate by a stirring motor. A stirring rod is fixedly connected to the bottom of the stirring shaft and can fit against the bottom wall of the synthesis cylinder.

[0014] In a preferred embodiment of this utility model, the wall of the rotating shaft is provided with a limiting structure, which includes an electrode plate and a limiting plate. The electrode plate is fixedly connected to the wall of the rotating shaft, and the limiting plate is symmetrically fixedly connected to the upper and lower walls of the swing rail.

[0015] In a preferred embodiment of this utility model, the rotating shaft is disc-shaped and located above the drive teeth. The limiting plate is rectangular and its wall surface can fit against the wall surface of the swing rail.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. By setting up a shaking structure, the synthesis efficiency of polylactic acid can be improved. When polylactic acid is synthesized in the synthesis cylinder, the shaking structure, in conjunction with the stirring rod, agitates the synthesis cylinder, thereby allowing the raw materials, dehydrating agent, and catalyst in the synthesis cylinder to fully fuse and react, thus making this scheme have a more efficient synthesis efficiency.

[0018] 2. By setting a limiting structure, misalignment between the driving and driven teeth can be prevented when the driving teeth drive the driven teeth, thus effectively improving the working stability of the device.

[0019] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0020] In the attached diagram:

[0021] Figure 1 This is a perspective view of the present utility model;

[0022] Figure 2 This is a perspective view of the inner cavity of the synthetic cylinder of this utility model;

[0023] Figure 3 This is a side view of the present invention;

[0024] Figure 4 This is an exploded view of the rotating shaft and the swing rail of this utility model;

[0025] Figure 5 This is a perspective view of the rotating shaft of this utility model.

[0026] In the diagram: 20. Synthesis cylinder; 21. Stirring motor; 22. Stirring shaft; 23. Stirring rod; 24. Frame; 30. Connecting shaft; 31. Rear frame; 32. Top plate; 33. Servo motor; 34. Rotating shaft; 35. Drive gear; 36. Electrode plate; 40. Connecting block; 41. Swing rail; 42. Passive gear; 43. Limiting plate. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.

[0028] like Figure 1 , Figure 2 and Figure 3 As shown, a polylactic acid synthesis device includes: a synthesis cylinder 20, which is a hollow cylinder with a cylindrical cavity, a cylindrical feed pipe installed at the top of the synthesis cylinder 20, a stirring motor 21 fixedly connected to the center of the top of the synthesis cylinder 20, and a solenoid valve for controlling the switch at the bottom of the synthesis cylinder 20.

[0029] The frame 24 consists of a rectangular frame at the bottom and symmetrical rectangular rods at the top of the frame. The synthesis cylinder 20 is located between the symmetrical rectangular rods at the top of the frame 24. A heating rod capable of heating is installed inside the cavity of the synthesis cylinder 20. The heating rod and the stirring motor 21 are both electrically connected to a corresponding power source. This is existing technology and will not be described in detail here.

[0030] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, a swaying structure is installed on the wall of the frame 24 to sway the synthesis cylinder 20. The swaying structure includes: a rotating shaft 34, a driving gear 35, a swing rail 41, and a driven gear 42. The rotating shaft 34 is rotatably located at the rear of the synthesis cylinder 20. The driving gear 35 is fixedly connected to the wall of the rotating shaft 34. The swing rail 41 is fixedly connected to the rear wall of the synthesis cylinder 20. The driven gear 42 is opened on the rear wall of the swing rail 41. The driving gear 35 can be threadedly connected to the driven gear 42.

[0031] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the rotating shaft 34 is cylindrical, the driving gear 35 is threaded, and the driving gear 35 is located on the arc surface of the rotating shaft 34. The swing rail 41 is an arc-shaped rod, and the driven gear 42 is located on the arc surface of the rear wall of the swing rail 41. The swaying structure also includes a connecting shaft 30, a rear frame 31, a top plate 32, a servo motor 33, and a connecting block 40. The connecting shaft 30 is symmetrically fixedly connected to the two side walls of the synthesis cylinder 20. The rear frame 31 is symmetrically fixedly connected to the rear wall of each rectangular rod of the connecting shaft 30. The top plate 32 is fixedly connected to the top of the symmetrical rear frame 31. The servo motor 33 is fixedly connected to the top of the top plate 32. The rotating shaft 34... The bottom of the top plate 32 is rotatably connected, the connecting block 40 is fixedly connected to the rear wall of the synthesis cylinder 20, the rear wall of the connecting block 40 can be fixedly connected to the front wall of the swing rail 41, the connecting shaft 30 is cylindrical, and the connecting shaft 30 on each side can pass through the wall of the frame 24. The rear frame 31 is an L-shaped rod, the top plate 32 can drive the rotating shaft 34 to rotate, the stirring shaft 22 is rotatably connected inside the cavity of the synthesis cylinder 20, the stirring shaft 22 is cylindrical, the stirring motor 21 can drive the stirring shaft 22 to rotate, the bottom of the stirring shaft 22 is fixedly connected to the stirring rod 23, and the stirring rod 23 can fit against the bottom wall of the synthesis cylinder 20;

[0032] In practical use, the raw materials are first added into the cavity of the synthesis cylinder 20 through the feed pipe at the top of the synthesis cylinder 20. Then, after all the raw materials, catalysts and dehydrating agents have been added, the power supply of the stirring motor 21, heating rod and servo motor 33 is turned on simultaneously. The heating rod can heat and synthesize the raw materials, catalysts and dehydrating agents in the cavity of the synthesis cylinder 20. When the power supply of the stirring motor 21 is turned on, it will drive the stirring shaft 22 to rotate. The stirring shaft 22 can drive the stirring rod 23 to rotate synchronously in the cavity of the synthesis cylinder 20 and stir the raw materials. When the power supply of the servo motor 33 is turned on, the servo motor 33 can drive the rotating shaft 34 to rotate. When the rotating shaft 34 rotates, it will drive the driving gear 35 to rotate synchronously. As the driving gear 35 rotates, the driving gear 35 can drive the synthesis cylinder 20 to swing around the connecting shaft 30 as the center through the threaded connection with the passive gear 42. After the synthesis cylinder 20 rotates 30 degrees, the servo motor 33 will drive the rotating shaft 34 to rotate in the opposite direction, so that the synthesis cylinder 20 swings in the opposite direction again, and so on.

[0033] In summary, the swaying structure can improve the synthesis efficiency of polylactic acid. When polylactic acid is synthesized in the synthesis cylinder 20, the swaying structure, in conjunction with the stirring rod 23, agitates the synthesis cylinder 20, thereby ensuring that the raw materials, dehydrating agent, and catalyst in the synthesis cylinder 20 are fully fused and reacted, resulting in a more efficient synthesis.

[0034] like Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, the wall of the rotating shaft 34 is provided with a limiting structure, which includes an electrode plate 36 and a limiting plate 43. The electrode plate 36 is fixedly connected to the wall of the rotating shaft 34, and the limiting plate 43 is symmetrically fixedly connected to the upper and lower walls of the swing rail 41. The rotating shaft 34 is disc-shaped and located above the drive tooth 35. The limiting plate 43 is rectangular and its wall can fit against the wall of the swing rail 41.

[0035] In practical use, as the passive tooth 42 moves, the upper limiting plate 43 can abut against the top of the pole plate 36, and the lower limiting plate 43 can abut against the bottom of the rotating shaft 34 when it moves with the swing rail 41.

[0036] In summary, by setting a limiting structure, misalignment between the driving tooth 35 and the driven tooth 42 when the driving tooth 35 drives the driven tooth 42 can be prevented, thus effectively improving the working stability of the device.

[0037] Working principle: First, the raw materials are added into the cavity of the synthesis cylinder 20 through the feed pipe at the top of the cylinder 20. Then, after all the raw materials, catalyst, and dehydrating agent have been added, the power to the stirring motor 21, heating rod, and servo motor 33 is turned on simultaneously. The heating rod heats and synthesizes the raw materials, catalyst, and dehydrating agent in the cavity of the synthesis cylinder 20. When the power is turned on, the stirring motor 21 drives the stirring shaft 22 to rotate. The stirring shaft 22 drives the stirring rod 23 to rotate synchronously in the cavity of the synthesis cylinder 20, agitating the raw materials. When the power to the servo motor 33 is turned on, the servo motor 33... 3 can drive the rotating shaft 34 to rotate. When the rotating shaft 34 rotates, it will drive the driving gear 35 to rotate synchronously. As the driving gear 35 rotates, the driving gear 35 can drive the synthesis cylinder 20 to swing around the connecting shaft 30 through the threaded connection with the passive gear 42. After the synthesis cylinder 20 rotates 30 degrees, the servo motor 33 will drive the rotating shaft 34 to rotate in the opposite direction, so that the synthesis cylinder 20 swings in the opposite direction again. This process is repeated. After the polylactic acid synthesis in the cavity of the synthesis cylinder 20 is completed, the solenoid valve at the bottom of the synthesis cylinder 20 can be opened to discharge the contents of the cavity of the synthesis cylinder 20.

[0038] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A polylactic acid synthesis device, characterized in that, The utility model relates to a synthetic cylinder (20) is hollow in the cavity, the top of synthetic cylinder (20) is equipped with the feeding pipe of tubular, the top of synthetic cylinder (20) is also fixedly connected with the stirring motor (21) of the center of circle, the bottom of synthetic cylinder (20) is equipped with the electromagnetic valve for controlling the switch of the bottom of synthetic cylinder (20). The utility model relates to a frame (24) is by the rectangular frame of bottom and the rectangular rod of the symmetry of rectangular frame top, and synthetic cylinder (20) sets up in the symmetry rectangular rod of frame (24) top, and the utility model relates to a shaking structure, and the shaking structure sets up in the wall surface of frame (24) for shaking synthetic cylinder (20), and the shaking structure includes: the pivot (34), drive gear (35), swing rail (41) and passive tooth (42), pivot (34) rotation sets up in the rear of synthetic cylinder (20), drive gear (35) fixedly connected on the wall surface of pivot (34), swing rail (41) fixedly connected on the rear wall surface of synthetic cylinder (20), passive tooth (42) sets up on the rear wall surface of swing rail (41), and drive gear (35) can be with passive tooth (42) screw thread connection. The utility model discloses a synthetic cylinder (20) is hollow in the cavity, the top of synthetic cylinder (20) is equipped with the feeding pipe of tubular, the top of synthetic cylinder (20) is also fixedly connected with the stirring motor (21) of the center of circle, the bottom of synthetic cylinder (20) is equipped with the electromagnetic valve for controlling the switch of the bottom of synthetic cylinder (20). The utility model discloses a frame (24) is by the rectangular frame of bottom and the rectangular rod of the symmetry of rectangular frame top, and synthetic cylinder (20) sets up in the symmetry rectangular rod of frame (24) top, and the utility model relates to a shaking structure, and the shaking structure sets up in the wall surface of frame (24) for shaking synthetic cylinder (20), and the shaking structure includes: the pivot (34), drive gear (35), swing rail (41) and passive tooth (42), pivot (34) rotation sets up in the rear of synthetic cylinder (20), drive gear (35) fixedly connected on the wall surface of pivot (34), swing rail (41) fixedly connected on the rear wall surface of synthetic cylinder (20), passive tooth (42) sets up on the rear wall surface of swing rail (41), and drive gear (35) can be with passive tooth (42) screw thread connection.

2. The polylactic acid synthesis apparatus according to claim 1, wherein The utility model discloses a synthetic cylinder (20) is hollow in the cavity, the top of synthetic cylinder (20) is equipped with the feeding pipe of tubular, the top of synthetic cylinder (20) is also fixedly connected with the stirring motor (21) of the center of circle, the bottom of synthetic cylinder (20) is equipped with the electromagnetic valve for controlling the switch of the bottom of synthetic cylinder (20).

3. The polylactic acid synthesis apparatus according to claim 1, wherein The utility model discloses a frame (24) is by the rectangular frame of bottom and the rectangular rod of the symmetry of rectangular frame top, and synthetic cylinder (20) sets up in the symmetry rectangular rod of frame (24) top, and the utility model relates to a shaking structure, and the shaking structure sets up in the wall surface of frame (24) for shaking synthetic cylinder (20), and the shaking structure includes: the pivot (34), drive gear (35), swing rail (41) and passive tooth (42), pivot (34) rotation sets up in the rear of synthetic cylinder (20), drive gear (35) fixedly connected on the wall surface of pivot (34), swing rail (41) fixedly connected on the rear wall surface of synthetic cylinder (20), passive tooth (42) sets up on the rear wall surface of swing rail (41), and drive gear (35) can be with passive tooth (42) screw thread connection.

4. The polylactic acid synthesis apparatus according to claim 3, wherein The utility model discloses a synthetic cylinder (20) is hollow in the cavity, the top of synthetic cylinder (20) is equipped with the feeding pipe of tubular, the top of synthetic cylinder (20) is also fixedly connected with the stirring motor (21) of the center of circle, the bottom of synthetic cylinder (20) is equipped with the electromagnetic valve for controlling the switch of the bottom of synthetic cylinder (20).

5. The polylactic acid synthesis apparatus according to claim 1, wherein The utility model discloses a frame (24) is by the rectangular frame of bottom and the rectangular rod of the symmetry of rectangular frame top, and synthetic cylinder (20) sets up in the symmetry rectangular rod of frame (24) top, and the utility model relates to a shaking structure, and the shaking structure sets up in the wall surface of frame (24) for shaking synthetic cylinder (20), and the shaking structure includes: the pivot (34), drive gear (35), swing rail (41) and passive tooth (42), pivot (34) rotation sets up in the rear of synthetic cylinder (20), drive gear (35) fixedly connected on the wall surface of pivot (34), swing rail (41) fixedly connected on the rear wall surface of synthetic cylinder (20), passive tooth (42) sets up on the rear wall surface of swing rail (41), and drive gear (35) can be with passive tooth (42) screw thread connection.

6. The polylactic acid synthesis apparatus according to claim 1, wherein The utility model discloses a synthetic cylinder (20) is hollow in the cavity, the top of synthetic cylinder (20) is equipped with the feeding pipe of tubular, the top of synthetic cylinder (20) is also fixedly connected with the stirring motor (21) of the center of circle, the bottom of synthetic cylinder (20) is equipped with the electromagnetic valve for controlling the switch of the bottom of synthetic cylinder (20).

7. The polylactic acid synthesis apparatus according to claim 6, wherein The utility model discloses a frame (24) is by the rectangular frame of bottom and the rectangular rod of the symmetry of rectangular frame top, and synthetic cylinder (20) sets up in the symmetry rectangular rod of frame (24) top, and the utility model relates to a shaking structure, and the shaking structure sets up in the wall surface of frame (24) for shaking synthetic cylinder (20), and the shaking structure includes: the pivot (34), drive gear (35), swing rail (41) and passive tooth (42), pivot (34) rotation sets up in the rear of synthetic cylinder (20), drive gear (35) fixedly connected on the wall surface of pivot (34), swing rail (41) fixedly connected on the rear wall surface of synthetic cylinder (20), passive tooth (42) sets up on the rear wall surface of swing rail (41), and drive gear (35) can be with passive tooth (42) screw thread connection. The utility model discloses a synthetic cylinder (20) is hollow in the cavity, the top of synthetic cylinder (20) is equipped with the feeding pipe of tubular, the top of synthetic cylinder (20) is also fixedly connected with the stirring motor (21) of the center of circle, the bottom of synthetic cylinder (20) is equipped with the electromagnetic valve for controlling the switch of the bottom of synthetic cylinder (20). The utility model discloses a frame (24) is by the rectangular frame of bottom and the rectangular rod of the symmetry of rectangular frame top, and synthetic cylinder (20) sets up in the symmetry rectangular rod of frame (24) top, and the utility model relates to a shaking structure, and the shaking structure sets up in the wall surface of frame (24) for shaking synthetic cylinder (20), and the shaking structure includes: the pivot (34), drive gear (35), swing rail (41) and passive tooth (42), pivot (34) rotation sets up in the rear of synthetic cylinder (20), drive gear (35) fixedly connected on the wall surface of pivot (34), swing rail (41) fixedly connected on the rear wall surface of synthetic cylinder (20), passive tooth (42) sets up on the rear wall surface of swing rail (41), and drive gear (35) can be with passive tooth (42) screw thread connection. The utility model discloses a synthetic cylinder (20) is hollow in the cavity, the top of synthetic cylinder (20) is equipped with the feeding pipe of tubular, the top of synthetic cylinder (20) is also fixedly connected with the stirring motor (21) of the center of circle, the bottom of synthetic cylinder (20) is equipped with the electromagnetic valve for controlling the switch of the bottom of synthetic cylinder (20). The utility model discloses a frame (24) is by the rectangular frame of bottom and the rectangular rod of the symmetry of rectangular frame top, and synthetic cylinder (20) sets up in the symmetry rectangular rod of frame (24) top, and the utility model relates to a shaking structure, and the shaking structure sets up in the wall surface of frame (24) for shaking synthetic cylinder (20), and the shaking structure includes: the pivot (34), drive gear (35), swing rail (41) and passive tooth (42), pivot (34) rotation sets up in the rear of synthetic cylinder (20), drive gear (35) fixedly connected on the wall surface of pivot (34), swing rail (41) fixedly connected on the rear wall surface of synthetic cylinder (20), passive tooth (42) sets up on the rear wall surface of swing rail (41), and drive gear (35) can be with passive tooth (42) screw thread connection. The utility model discloses a synthetic cylinder (20) is hollow in the cavity, the top of synthetic cylinder (20) is equipped with the feeding pipe of tubular, the top of synthetic cylinder (20) is also fixedly connected with the stirring motor (21) of the center of circle

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