Recovery equipment for production of medical PVC (polyvinyl chloride) granules

Abstract

The utility model relates to the technical field of PVC (polyvinyl chloride) production, in particular to recovery equipment for medical PVC granule production, which comprises a crushing mechanism for recovery, a box mechanism is arranged above the crushing mechanism, and a screening mechanism is arranged in the box mechanism; the box body mechanism comprises a screening barrel body, a guide barrel, a feeding guide block and a discharging guide block, the guide barrel is fixedly connected to the inner side of the screening barrel body, and the guide barrel is used for being matched with the feeding guide block to guide out sand grains. The box body mechanism and the screening mechanism are matched with each other, plastic particles containing sand grains can be screened through the rotating screening net barrel and the spiral piece, the sand grains fall off from the screening net barrel and are guided by the guide barrel to be separated, and therefore part of the plastic particles can be prevented from bouncing and mistakenly entering a waste material pile, and the screening efficiency is improved. And therefore, waste can be avoided, more fineness can be achieved during screening, and the quality of the recycled PVC granules is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of PVC production, and in particular relates to a recycling device for producing medical PVC pellets. Background Art

[0002] Medical PVC granules are medical-grade polyvinyl chloride granules, which are widely used in the production of medical devices such as infusion tubes, blood bags, and catheters. Due to their excellent biocompatibility, transparency, antibacterial properties, and processing performance, some non-conforming defective products will be produced during the production process. Therefore, recycling equipment is needed to improve resource recycling rates and control costs.

[0003] In the Chinese patent with publication number CN210880429U, a crushing and recycling device for plastic particle production is mentioned, which puts waste plastic particles into the filter plate inside the box through the feed inlet, turns on the fan by controlling the switch group, so that the fan rotates to blow the lighter plastic particles to the oblique baffle on the right side of the box, and the heavier sand particles flow into the waste trough from the evenly distributed filter holes opened on the left side of the upper surface of the filter plate, and then are discharged from the waste outlet opened on the left side of the box. The purified plastic particles flow into the discharge trough through the discharge port opened on the right side of the upper surface of the filter plate, and then flow into the crushing box through the discharge trough. The motor is turned on by controlling the switch group, so that the motor drives the rotating shaft to rotate, so that the blades evenly distributed on the circumferential surface of the rotating shaft rotate, thereby completely crushing the plastic particles. The above steps are used to purify the waste plastic particles and prevent the sand particles from entering the crushing box, thereby protecting the blades and extending the service life of the blades.

[0004] Although the above equipment can separate sand and plastic particles by wind power when in use, the plastic particles will be blocked by the inclined guide plate of the equipment and collide when being blown, causing these rebounded particles to bounce chaotically in the box and easily fall into the waste trough by mistake, resulting in the inability to be crushed and reused, which in turn leads to waste. Utility Model Content

[0005] The purpose of the utility model is to provide a recycling device for producing medical PVC pellets to solve the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A recycling device for producing medical PVC pellets, comprising a crushing mechanism for recycling, a box mechanism being provided above the crushing mechanism, and a screening mechanism being provided inside the box mechanism; the box mechanism comprising a screening cylinder, a guide cylinder, a feed guide block and a discharge guide block, the guide cylinder being fixedly connected to the inner side of the screening cylinder, the guide cylinder being used to cooperate with the feed guide block to discharge sand, the feed guide block being also used to import materials, and the discharge guide block being used to discharge the screened materials; the screening mechanism comprising a screening mesh cylinder and spiral plates, the screening mesh cylinder being located on the inner side of the guide cylinder, the screening mesh cylinder and the spiral plates being used to screen PVC waste containing sand; the crushing mechanism comprising a crushing cylinder, the crushing mechanism being used to crush and process the screened PVC waste.

[0008] Preferably: a feed port is provided above the screening cylinder, the feed guide block is installed at one end of the screening cylinder, the discharge guide block is installed at the other end of the screening cylinder, an upper introduction groove is provided above the feed guide block, and the upper introduction groove is used to cooperate with the feed port to introduce PVC waste containing sand into the screening mesh cylinder.

[0009] Preferably: a discharge port is provided at the bottom of the screening cylinder, a lower guide groove is provided at the bottom of the feed guide block, the lower guide groove is used to cooperate with the guide cylinder, the upper edge of the lower guide groove is flush with the lower edge of one end of the screening mesh cylinder, and a connecting groove is provided at the bottom of the discharge guide block for cooperating with the discharge port.

[0010] Preferably: both ends of the screening mesh cylinder are fixedly connected with connecting rings, the center of the connecting ring is fixedly connected with a driving shaft, a servo motor is installed on one side of the feed guide block, one end of the driving shaft is installed on the output end of the servo motor, and the driving shaft passes through and rotatably connects the feed guide block and the discharge guide block.

[0011] Preferably, a connecting block is provided below the box mechanism, and the connecting block is used to connect the screening cylinder and the crushing cylinder.

[0012] Preferably, a driving motor is installed at one end of the crushing cylinder, and a crushing blade is installed at the output end of the driving motor located inside the crushing cylinder. A connecting port is opened on the top of the crushing cylinder, and the connecting port is used to fit the discharge port.

[0013] Preferably, a feeding port is connected to the lower side of the pulverizing cylinder, and an opening and closing plate is provided inside the feeding port.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The utility model cooperates with the box mechanism and the screening mechanism to screen the plastic particles containing sand through the rotating screening cylinder and the spiral blade, so that the sand falls from the screening cylinder and is guided by the guide cylinder to complete the separation, thereby preventing some plastic particles from bouncing into the waste pile by mistake, thereby avoiding waste.

[0016] 2. The utility model cooperates with the box mechanism and the screening mechanism to make the screening net cylinder and the spiral blades more detailed when rotating and screening the sand and plastic particles, thereby further improving the quality of the recovered PVC particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of the entire utility model;

[0018] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model as a whole;

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of the pulverizing mechanism of the present utility model;

[0020] Figure 4 This is a structural diagram of the box mechanism of the utility model;

[0021] Figure 5 It is a structural diagram of the screening mechanism of the utility model.

[0022] In the picture:

[0023] 1. Box body; 11. Screening cylinder; 12. Guide cylinder; 13. Feed port; 14. Feed guide block; 15. Upper feed chute; 16. Lower feed chute; 17. Discharge port; 18. Discharge guide block; 19. Connecting block;

[0024] 2. Screening mechanism; 21. Servo motor; 22. Drive shaft; 23. Screening cylinder; 24. Connecting ring; 25. Spiral sheet;

[0025] 3. Crushing mechanism; 31. Crushing cylinder; 32. Driving motor; 33. Crushing blade; 34. Feeding port; 35. Opening and closing plate; 36. Connecting port. DETAILED DESCRIPTION

[0026] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Reference Figure 1-Figure 5 As shown, the utility model provides a recycling device for producing medical PVC pellets, comprising a crushing mechanism 3 for recycling, a box mechanism 1 is provided above the crushing mechanism 3, and a screening mechanism 2 is provided inside the box mechanism 1; the box mechanism 1, the screening mechanism 2 and the crushing mechanism 3 are all supported externally by a bracket, and the external part can be connected to a PLC controller via a line to operate the device;

[0028] The box mechanism 1 includes a screening cylinder 11, a guide cylinder 12, an inlet guide block 14, and a discharge guide block 18. The guide cylinder 12 is fixedly connected to the inner side of the screening cylinder 11. The guide cylinder 12 is used to cooperate with the inlet guide block 14 to discharge sand. The inlet guide block 14 is also used to introduce materials. The discharge guide block 18 is used to discharge the screened materials. The guide cylinder 12 matches the outer periphery of the screening cylinder 23, thereby guiding the sand to the left.

[0029] The screening mechanism 2 includes a screening cylinder 23 and a spiral sheet 25. The screening cylinder 23 is located inside the guide cylinder 12. The screening cylinder 23 and the spiral sheet 25 are used to screen the PVC waste containing sand.

[0030] The pulverizing mechanism 3 includes a pulverizing cylinder 31 , and is used for pulverizing the screened PVC waste.

[0031] In a further embodiment, a feed port 13 is provided above the screening cylinder 11, a feed guide block 14 is installed at one end of the screening cylinder 11, and a discharge guide block 18 is installed at the other end of the screening cylinder 11. An upper inlet groove 15 is provided above the feed guide block 14, and the upper inlet groove 15 is used to cooperate with the feed port 13 to introduce PVC waste containing sand into the screening mesh cylinder 23.

[0032] In this embodiment, the cross-section of the feed guide block 14 allows the material entering from the feed port 13 to directly enter the interior of the screening mesh cylinder 23 through the upper inlet groove 15, while the sand screened from the screening mesh cylinder 23 can only enter the lower outlet groove 16 through the guidance of the guide cylinder 12.

[0033] In a further embodiment, a discharge port 17 is provided at the bottom of the screening cylinder 11, and a lower guide groove 16 is provided at the bottom of the feed guide block 14. The lower guide groove 16 is used to cooperate with the guide cylinder 12. The upper edge of the lower guide groove 16 is flush with the lower edge of one end of the screening mesh cylinder 23, and a connecting groove is provided at the bottom of the discharge guide block 18 for cooperating with the discharge port 17.

[0034] In this embodiment, the screening cylinder 11 is provided with a through groove at the lower guide groove 16, so that the lower guide groove 16 can be connected to the groove of the connecting block 19 to discharge the sand; a notch is provided below the discharge guide block 18, and the lower edge of the notch is flush with the right end of the screening mesh cylinder 23, so that the screened fine PVC particles can enter the interior of the crushing mechanism 3 through the discharge port 17 and the connecting block 19.

[0035] In a further embodiment, both ends of the screening mesh cylinder 23 are fixedly connected with connecting rings 24, the center of the connecting ring 24 is fixedly connected with a drive shaft 22, a servo motor 21 is installed on one side of the feed guide block 14, one end of the drive shaft 22 is installed at the output end of the servo motor 21, and the drive shaft 22 penetrates and rotates to connect the feed guide block 14 and the discharge guide block 18.

[0036] In this embodiment, the left end of the screening cylinder 23 is larger than the right end, and the spiral blade 25 also fits the inner wall of the screening cylinder 23. Therefore, when the screening cylinder 23 and the spiral blade 25 rotate, the closer the material is to the right end, the higher the accuracy. That is, large materials will be located at the left end of the screening cylinder 23.

[0037] In a further embodiment, a connecting block 19 is provided below the box mechanism 1 , and the connecting block 19 is used to connect the screening cylinder 11 and the crushing cylinder 31 .

[0038] In this embodiment, the connecting block 19 is also provided with a lower guide groove 16 and a discharge port 17, so that the waste material screened by the box mechanism 1 and the screening mechanism 2 enters the crushing cylinder 31, and the screened sand impurities are discharged to the outside.

[0039] In a further embodiment, a driving motor 32 is installed at one end of the crushing cylinder 31, and a crushing blade 33 is installed inside the crushing cylinder 31 at the output end of the driving motor 32. A connecting port 36 is opened above the crushing cylinder 31, and the connecting port 36 is used to fit the discharge port 17.

[0040] In this embodiment, the crushing blade 33 is in close contact with the inner wall of the crushing cylinder 31 when rotating, thereby crushing the material into powder. At the same time, the high-speed rotation causes the material to be concentrated above the opening and closing plate 35.

[0041] In a further embodiment, a feed opening 34 is connected to the lower side of the pulverizing cylinder 31 , and an opening and closing plate 35 is provided inside the feed opening 34 .

[0042] In this embodiment, the opening and closing plate 35 is connected to an external PLC controller through a line. When the material in the pulverizing cylinder 31 is fully pulverized into powder, the opening and closing plate 35 can be opened to discharge the material.

[0043] The working principle of this utility model is as follows:

[0044] When the waste or defective products in the production of medical PVC granules are to be recycled, they can be poured into the inside of the feed port 13, so that they are guided by the upper inlet groove 15 and enter the inside of the screening mesh drum 23. Then, the servo motor 21 is operated by the operation of the external controller, so that the screening mesh drum 23 and the spiral plate 25 are rotated through the drive shaft 22 and the connecting ring 24. At this time, the waste particles containing sand will first be screened by one end of the screening mesh drum 23, and slowly move to the other end of the screening mesh drum 23 as the spiral plate 25 rotates. During the movement, the diameter of the screening mesh drum 23 is reduced, so that the larger pieces of material to be processed return to the initial position. The continuous reciprocating movement allows small waste to pass through the discharge guide block 18 and the inside of the discharge port 17 and then enter the inside of the crushing mechanism 3 to be crushed, while the large pieces of waste will continue to be screened, so that the screening is more detailed, and the material cannot pass through the screening mesh drum 23 to enter the outside during screening, thereby avoiding waste.

[0045] The sand particles that have been screened out will enter the lower guide groove 16 along the guide inside the guide cylinder 12 and then be discharged from the guide groove on one side of the connecting block 19.

[0046] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A recycling device for producing medical PVC pellets, comprising a crushing mechanism (3) for recycling, characterized in that: A box mechanism (1) is provided above the crushing mechanism (3), and a screening mechanism (2) is provided inside the box mechanism (1); The box mechanism (1) comprises a screening cylinder (11), a guide cylinder (12), an inlet guide block (14) and a discharge guide block (18); the guide cylinder (12) is fixedly connected to the inner side of the screening cylinder (11); the guide cylinder (12) is used to cooperate with the inlet guide block (14) to discharge sand particles; the inlet guide block (14) is also used to introduce materials; and the discharge guide block (18) is used to discharge the screened materials; The screening mechanism (2) comprises a screening net cylinder (23) and a spiral sheet (25), wherein the screening net cylinder (23) is located inside the guide cylinder (12), and the screening net cylinder (23) and the spiral sheet (25) are used to screen PVC waste containing sand particles; The pulverizing mechanism (3) comprises a pulverizing cylinder (31), and the pulverizing mechanism (3) is used for pulverizing and processing the PVC waste after screening.

2. The recycling equipment for producing medical PVC pellets according to claim 1, characterized in that: A feed port (13) is provided above the screening cylinder (11), the feed guide block (14) is installed at one end of the screening cylinder (11), and the discharge guide block (18) is installed at the other end of the screening cylinder (11). An upper introduction groove (15) is provided above the feed guide block (14), and the upper introduction groove (15) is used to cooperate with the feed port (13) to introduce PVC waste containing sand into the screening mesh cylinder (23).

3. The recycling equipment for producing medical PVC pellets according to claim 2, characterized in that: A discharge port (17) is provided at the bottom of the screening cylinder (11), a lower guide groove (16) is provided at the bottom of the feed guide block (14), the lower guide groove (16) is used to cooperate with the guide cylinder (12), the upper edge of the lower guide groove (16) is flush with the lower edge of one end of the screening mesh cylinder (23), and a connecting groove is provided at the bottom of the discharge guide block (18) for cooperating with the discharge port (17).

4. The recycling equipment for producing medical PVC pellets according to claim 1, characterized in that: Both ends of the screening mesh cylinder (23) are fixedly connected with connecting rings (24), the center of the connecting ring (24) is fixedly connected with a driving shaft (22), a servo motor (21) is installed on one side of the feed guide block (14), one end of the driving shaft (22) is installed on the output end of the servo motor (21), and the driving shaft (22) passes through and rotatably connects the feed guide block (14) and the discharge guide block (18).

5. The recycling equipment for producing medical PVC pellets according to claim 1, characterized in that: A connecting block (19) is provided below the box mechanism (1), and the connecting block (19) is used to connect the screening cylinder (11) and the crushing cylinder (31).

6. The recycling equipment for producing medical PVC pellets according to claim 1, characterized in that: A driving motor (32) is installed at one end of the pulverizing cylinder (31), and a pulverizing blade (33) is installed at the output end of the driving motor (32) located inside the pulverizing cylinder (31). A connecting opening (36) is provided above the pulverizing cylinder (31), and the connecting opening (36) is used to fit into the discharge port (17).

7. The recycling equipment for producing medical PVC pellets according to claim 6, characterized in that: A feeding port (34) is connected to the lower side of the pulverizing cylinder (31), and an opening and closing plate (35) is provided inside the feeding port (34).

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