Underwater granulator with integrated driving valve and plate changing valve

Abstract

The invention discloses an underwater granulator integrated with a driving valve and a plate changing valve, and relates to the technical field of granulators. Comprising an integrated extrusion mechanism, the integrated extrusion mechanism comprises a driving valve assembly and a plate changing valve assembly, a cooling mechanism is arranged on one side of the integrated extrusion mechanism and used for cooling plastic strips extruded by the integrated extrusion mechanism, and an automatic pelletizing mechanism is arranged at the end, away from the integrated extrusion mechanism, of the cooling mechanism. The automatic pelletizing mechanism utilizes water flow power in the cooling mechanism to automatically pelletize plastic strips, water in the cooling mechanism has flowing force, and the automatic pelletizing mechanism can utilize the water flow power in the cooling mechanism and convert the water flow power in the cooling mechanism into shearing force. According to the underwater granulator, the cutting mechanism is arranged, the plastic strips conveyed by the cooling mechanism are sheared, automatic granulation of the plastic strips is achieved, no extra power source needs to be provided, energy consumption and equipment cost of the underwater granulator with the integrated start-up valve and the plate changing valve are reduced, and machining cost of plastic particles is also reduced.

Description

Technical Field

[0001] The invention relates to the technical field of pelletizers, in particular to an underwater pelletizer with an integrated start-up valve and a plate-changing valve. Background Art

[0002] The underwater pelletizer is a device specially used to produce plastic pellets. It mainly processes plastic into plastic pellets in cooling water. In this way, the plastic pellets will not stick together in the cooling water, and the cooling water will also wash the plastic pellets to ensure the cleanliness of the produced plastic pellets. There is an underwater pelletizer disclosed in a Chinese patent application with publication number CN116021666A and a large underwater pelletizer disclosed in a Chinese patent application with publication number CN108081499A. When such underwater pelletizers perform underwater pelletizing operations on plastics, the pelletizing cutters used require an additional motor to provide power, so a sealing mechanism is required between the motor and the pelletizing cutters. On the one hand, the additional power source will increase the energy consumption of plastic pelletizing and increase the production and processing cost of the underwater pelletizer. On the other hand, the sealing mechanism requires regular maintenance, which increases the use cost of the underwater pelletizer. Summary of the invention

[0003] In order to overcome the above-mentioned technical problems, the purpose of the present invention is to provide an underwater pelletizer with an integrated start-up valve and a plate-changing valve, so as to solve the problem in the prior art that the pelletizer cutting tool of the underwater pelletizer requires an additional motor to provide power, so that a sealing mechanism is required between the motor and the pelletizer cutting tool, resulting in the need for regular maintenance of the sealing mechanism, thereby increasing the use cost of the underwater pelletizer.

[0004] The purpose of the present invention can be achieved through the following technical solutions: Specifically, an underwater pelletizer with an integrated start-up valve and a plate-changing valve is provided, including an integrated extrusion mechanism, which includes an start-up valve assembly and a plate-changing valve assembly. A cooling mechanism is arranged on one side of the integrated extrusion mechanism for cooling the plastic strips extruded by the integrated extrusion mechanism. An automatic pelletizing mechanism is arranged at one end of the cooling mechanism away from the integrated extrusion mechanism. The automatic pelletizing mechanism utilizes the water flow power inside the cooling mechanism to automatically pelletize the plastic strips.

[0005] As a further solution of the present invention: the start-up valve assembly includes a start-up valve body, an extrusion channel penetrates the inner center position of the start-up valve body, the top surface of the start-up valve body is fixedly connected to a vertical frame, the top surface of the vertical frame is bolted to a vertical hydraulic valve, and the vertical hydraulic valve is connected to an isolation baffle through a hydraulic rod.

[0006] As a further solution of the present invention: the plate changing valve assembly includes a plate changing frame, which is horizontally installed on the side of the start-up valve body, one end of the plate changing frame is bolted to a horizontal hydraulic cylinder, the horizontal hydraulic cylinder is connected to the extrusion die plate through a hydraulic rod, and a plate changing groove that matches the extrusion die plate is opened on the side of the start-up valve body near the extrusion die plate.

[0007] As a further solution of the present invention: the cooling mechanism includes a plurality of cooling boxes butted against each other, one end of the cooling box is fixedly connected with a butt plate, and a rotating conveying frame is installed inside the cooling box via a bearing.

[0008] As a further solution of the present invention: the rotating conveying frame includes a rotating ring, a fixed ring and a movable ring are arranged on the inner side of the rotating ring, a first impeller blade is fixedly connected to the fixed ring, and a second impeller blade is fixedly connected to the movable ring, and the first impeller blade and the second impeller blade are in opposite directions.

[0009] As a further solution of the present invention: a plurality of rollers are rotatably connected to the inner side of the rotating ring close to the first impeller blade and the second impeller blade, and the plurality of rollers are parallel to the axial direction of the rotating ring.

[0010] As a further solution of the present invention: the automatic pelletizing mechanism includes a mechanism body, a docking groove matching the cooling box is provided on one side of the mechanism body near the cooling box, a feed trough is provided on the inner side of the docking groove, a pelletizing roller is installed on one end of the inner side of the feed trough, a collecting chamber is provided at the bottom of the pelletizing roller, a feed conveyor belt is provided inside the collecting chamber, and a discharge trough is provided on the other side of the mechanism body near the top of the feed conveyor belt.

[0011] As a further solution of the present invention: a limiting pressure block is installed in the middle of the top surface of the feed trough.

[0012] As a further solution of the present invention: a power gear is installed on the top surface of the docking groove through a rotating shaft, the top surface of the power gear is meshed with a power shaft, the bottom surface of the power gear is meshed with its corresponding rotating conveying frame, the middle part of the power shaft is meshed with a driven shaft, and the end of the power shaft away from the power gear is meshed with a third conveying wheel, and the third conveying wheel is arranged on the inner side of the conveyor belt.

[0013] As a further solution of the present invention: the pelletizing roller comprises a turntable, a plurality of cutters are fixedly connected to the inner edge of the turntable, one end of the turntable is fixedly connected to a connecting shaft, and the connecting shaft is meshed with the bottom end of the driven shaft.

[0014] Beneficial effects of the present invention: 1. In the present invention, since the cooling mechanism cools the plastic by water cooling, the water in the cooling mechanism has flow force, and the automatic pelletizing mechanism can utilize the water flow force inside the cooling mechanism and convert the water flow force inside the cooling mechanism into shear force, so as to perform shearing operation on the plastic strips delivered by the cooling mechanism, thereby realizing automatic pelletizing of the plastic strips without providing an additional power source, reducing the energy consumption and equipment cost of the underwater pelletizer with integrated opening valve and plate changing valve, and also reducing the processing cost of plastic pellets.

[0015] 2. In the present invention, when the plate changing valve assembly needs to be used, the vertical hydraulic valve is opened first. The vertical hydraulic valve drives the isolation baffle through the hydraulic rod, so that the cylindrical hole on the isolation baffle is offset from the extrusion channel, and the extrusion channel is closed. Then the horizontal hydraulic cylinder is opened. The horizontal hydraulic cylinder can drive the extrusion die plate through the hydraulic rod to make the extrusion die plate slide in the plate changing groove, and the sliding extrusion die plate can complete the replacement of the extrusion cavity, thereby simplifying the replacement process of the extrusion die plate.

[0016] 3. In the present invention, since several cooling boxes are butt-jointed together, several rotating conveying frames inside the cooling boxes are also butt-jointed together, and several rotating conveying frames are fixedly connected by bolts, so when the rotating conveying frames rotate, several rotating conveying frames will rotate synchronously. Since a fixed ring is fixedly connected to the rotating ring, and a first impeller blade is fixedly connected to the upper portion of the fixed ring, when cooling water inside the cooling box flows, the first impeller blade will drive the rotating ring through the fixed ring under the drive of the water flow, so that the rotating ring rotates inside the cooling box, and the movable ring is slidably connected to the rotating ring, and a second impeller blade is fixedly connected to the movable ring in an opposite direction to the first impeller blade, so the movable ring will rotate in an opposite direction to the rotating ring under the drive of the second impeller blade, so that the first impeller blade and the second impeller blade can continuously stir the cooling water in the cooling box, so that the heat exchange between the cooling water and the plastic strips is more uniform, thereby ensuring that the heat dissipation efficiency in the cooling water is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] Figure 1 It is a structural schematic diagram of an underwater pelletizer with an integrated start-up valve and a plate-changing valve according to the present invention; Figure 2 It is a front view of the underwater pelletizer with integrated start-up valve and plate-changing valve of the present invention; Figure 3 It is a top view of the underwater pelletizer with integrated start-up valve and plate-changing valve of the present invention; Figure 4 It is a partial structural schematic diagram of the integrated extrusion mechanism and cooling mechanism in the present invention; Figure 5It is a structural schematic diagram of the integrated extrusion mechanism of the present invention; Figure 6 It is a structural schematic diagram of the start valve assembly of the present invention; Figure 7 It is a structural schematic diagram of the plate-changing valve assembly in the present invention; Figure 8 It is a structural schematic diagram of the cooling mechanism in the present invention; Fig. 9 It is a structural schematic diagram of the back side of the cooling mechanism in the present invention; Fig.10 It is a structural schematic diagram of the rotating conveyor frame in the present invention; Fig.11 It is a schematic diagram of the structure of the rotating ring in the present invention; Fig.12 is a cross-sectional view of the automatic pelletizing mechanism of the present invention; Fig.13 It is a schematic structural diagram of the pelletizing roller in the present invention.

[0019] Figure numerals: 1. integrated extrusion mechanism; 11. start-up valve assembly; 111. start-up valve body; 112. extrusion channel; 113. vertical frame; 114. vertical hydraulic valve; 115. isolation baffle; 116. plate-changing groove; 12. plate-changing valve assembly; 121. plate-changing frame; 122. horizontal hydraulic cylinder; 123. extrusion die plate; 124. sliding card; 125. extrusion cavity; 2. cooling mechanism; 21. cooling box; 22. docking plate; 23. rotating conveying frame; 231. rotating ring; 232. fixed ring; 233. first impeller 234, movable ring; 235, second impeller blade; 236, rotating roller; 3, automatic pelletizing mechanism; 31, mechanism body; 32, docking groove; 33, feed trough; 34, limiting pressure block; 35, pelletizing roller; 351, turntable; 352, connecting rod; 353, cutter; 354, connecting shaft; 36, collecting chamber; 37, feed belt; 38, first conveying wheel; 39, second conveying wheel; 310, third conveying wheel; 311, discharge trough; 312, power gear; 313, power shaft; 314, driven shaft; 4, supporting base. DETAILED DESCRIPTION

[0020] The following will be combined with the 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0021] Example 1

[0022] like Figure 1-Figure 9As shown, the present invention discloses an underwater pelletizer with integrated start-up valve and plate-changing valve, comprising an integrated extrusion mechanism 1, which comprises an start-up valve assembly 11 and a plate-changing valve assembly 12, wherein a cooling mechanism 2 is arranged on one side of the integrated extrusion mechanism 1 for cooling the plastic strips extruded by the integrated extrusion mechanism 1, wherein an automatic pelletizing mechanism 3 is arranged on one end of the cooling mechanism 2 away from the integrated extrusion mechanism 1, and the automatic pelletizing mechanism 3 automatically pelletizes the plastic strips by utilizing the water flow power inside the cooling mechanism 2, and the bottoms of the integrated extrusion mechanism 1 and the cooling mechanism 2 are both connected with a supporting base 4, and the supporting base 4 ensures that the integrated extrusion mechanism 1 and the cooling mechanism 2 are at the same height for processing the plastic, and it should be noted that a screw extruder is connected on one side of the integrated extrusion mechanism 1 away from the cooling mechanism 2, and the specifications of the screw extruder are adaptively selected by technicians in this field according to the specific plastic model and the specifications of the underwater pelletizer with integrated start-up valve and plate-changing valve, so as to ensure that the screw extruder can convey the molten plastic to the integrated extruder The screw extruder 1 is then turned on, so that when working, the screw extruder is first turned on, and the screw extruder can convey the molten plastic to the integrated extrusion mechanism 1. The integrated extrusion mechanism 1 adjusts the specifications of the plastic extrusion through the start valve assembly 11 and the plate changing valve assembly 12. After passing through the integrated extrusion mechanism 1, the molten plastic will enter the cooling mechanism 2, and water-cooling will be performed in the cooling mechanism 2. The cooled plastic will solidify quickly, and then the solidified plastic will enter the automatic pelletizing mechanism 3 through the cooling mechanism 2. Since the cooling mechanism 2 is operated by water cooling when cooling the plastic, the water in the cooling mechanism 2 has flow force, and the automatic pelletizing mechanism 3 can utilize the water flow force inside the cooling mechanism 2 and convert the water flow force inside the cooling mechanism 2 into shear force, and perform shearing operation on the plastic strips conveyed by the cooling mechanism 2, thereby realizing automatic pelletizing of the plastic strips, without the need to provide an additional power source, reducing the energy consumption and equipment cost of the underwater pelletizer with the integrated start valve and plate changing valve, and also reducing the processing cost of plastic particles.

[0023] Example 2

[0024] like Figure 4-Figure 7As shown, the start-up valve assembly 11 includes a start-up valve body 111, and an extrusion channel 112 runs through the inner center position of the start-up valve body 111. One end of the extrusion channel 112 is directly and sealedly connected to the output end of the screw extruder to ensure that the molten plastic delivered by the screw extruder can directly enter the interior of the extrusion channel 112. The top surface of the start-up valve body 111 is fixedly connected to a vertical frame 113, and the top surface of the vertical frame 113 is bolted to a vertical hydraulic valve 114. The vertical hydraulic valve 114 is connected to an isolation baffle 115 through a hydraulic rod. It should be noted that a cylindrical hole that matches the extrusion channel 112 is provided in the middle of the isolation baffle 115 near the extrusion channel 112. When the vertical hydraulic valve 114 is opened, the vertical hydraulic valve 114 can drive the isolation baffle 115 through the hydraulic rod. When the cylindrical hole on the isolation baffle 115 is opened, the vertical hydraulic valve 114 can drive the isolation baffle 115 through the hydraulic rod. When the hole coincides with the extrusion channel 112, the extrusion channel 112 is in an open state. When the cylindrical hole on the isolation baffle 115 is staggered with the extrusion channel 112, the extrusion channel 112 is in a closed state. If the integrated extrusion mechanism 1 needs to normally convey the molten plastic, the extrusion channel 112 is in an open state. If the integrated extrusion mechanism 1 needs to use the plate changing valve assembly 12, the extrusion channel 112 is in a closed state. When the extrusion channel 112 is in a closed state, the isolation baffle 115 will isolate the molten plastic inside the extrusion channel 112 to ensure the normal operation of the plate changing valve assembly 12. After the operation of the plate changing valve assembly 12 is completed, the isolation baffle 115 can be adjusted by the vertical hydraulic valve 114 to make the extrusion channel 112 in an open state, so as not to affect the normal operation of the integrated extrusion mechanism 1.

[0025] like Figure 4-Figure 7As shown, the plate changing valve assembly 12 includes a plate changing frame 121, which is horizontally installed on the side of the start-up valve body 111, and one end of the plate changing frame 121 is bolted to a horizontal hydraulic cylinder 122, and the horizontal hydraulic cylinder 122 is connected to an extrusion die plate 123 through a hydraulic rod. A plate changing groove 116 that matches the extrusion die plate 123 is provided on the side of the start-up valve body 111 near the extrusion die plate 123. It should be noted that when the plate changing valve assembly 12 needs to be used, the vertical hydraulic valve 114 is opened first, and the vertical hydraulic valve 114 drives the isolation baffle 115 through the hydraulic rod, so that the cylindrical hole on the isolation baffle 115 is staggered with the extrusion channel 112, and the extrusion channel 112 is closed, and then the horizontal hydraulic cylinder 122 is opened. The horizontal hydraulic cylinder 122 can drive the extrusion die plate 123 through the hydraulic rod to make the extrusion die plate 123 slide in the plate changing groove 116, and the extrusion die plate 123 needs to be moved. At least two groups of extrusion cavities 125 are provided, and the aperture sizes of the extrusion holes opened in the two groups of extrusion cavities 125 are different, so that the specifications of the extruded plastic strips will also be different, and the sizes of the cut plastic particles will also be different. Therefore, different extrusion cavities 125 can be adjusted according to the required plastic particles. When a group of extrusion cavities 125 of the extrusion die plate 123 corresponds to the extrusion channel 112, plastic strips of the size of that group of extrusion holes are extruded. The two ends of the extrusion die plate 123 are fixedly connected with sliding cards 124 near the plate changing frame 121, and the two ends of the sliding cards 124 are fixedly connected with circular holes that match the plate changing frame 121. The extrusion die plate 123 can stably slide on the plate changing frame 121 through the cooperation of the sliding cards 124 and the plate changing frame 121, and the sliding extrusion die plate 123 can complete the replacement of the extrusion cavity 125, which simplifies the replacement process of the extrusion die plate 123 and facilitates on-site operation by technicians.

[0026] Example 3

[0027] like Figure 1-Figure 11As shown, the cooling mechanism 2 includes a plurality of cooling boxes 21 that are butted against each other, one end of the cooling box 21 is fixedly connected to a butt plate 22, and a rotating conveying frame 23 is installed inside the cooling box 21 through a bearing. It should be noted that the plurality of cooling boxes 21 are sealed and connected through the butt plate 22 and are connected into a long strip shape. The plastic strip extruded from the integrated extrusion mechanism 1 will directly enter the cooling box 21, and the cooling box 21 is filled with cooling water. The cooling water is transported to the inside of the cooling box 21 through a pipeline. The pipeline is not shown in the drawings, but those skilled in the art can make an adaptive connection according to the specifications of the cooling box 21 to ensure that the pipeline can transport the cooling water to the cooling box 21. In addition, it should be noted that the cooling water is in the cooling box 21 and There is circulation between the pipes to ensure full utilization of water resources. For example, the cooling water input pipe can be set on the cooling box 21 far away from one end of the integrated extrusion mechanism 1, and the cooling water output pipe can be set on the cooling box 21 close to one end of the integrated extrusion mechanism 1. Then the input pipe and the output pipe are connected to the water tank, so that the cooling water between several cooling boxes 21 can flow continuously, taking out the heat on the plastic strips, so that the plastic strips can be cooled and solidified. The height of the water tank can be higher than the height of the cooling box 21, so that the cooling water in the water tank can automatically enter the interior of the cooling box 21 through the input pipe under the action of gravity, and a water pump can be set in the output pipe, and the water pump pumps the cooling water in the output pipe back to the water tank, thereby realizing a circulating supply of cooling water.

[0028] like Figure 7-Figure 11As shown, the rotating conveyor frame 23 includes a rotating ring 231, and a fixed ring 232 and a movable ring 234 are arranged on the inner side of the rotating ring 231. The first impeller blade 233 is fixedly connected to the fixed ring 232, and the second impeller blade 235 is fixedly connected to the movable ring 234. The first impeller blade 233 and the second impeller blade 235 are oriented in opposite directions. It should be noted that the rotating conveyor frame 23 is arranged on the inner side of the cooling box 21. Since several cooling boxes 21 are docked together, the rotating conveyor frames 23 inside several cooling boxes 21 are also docked together, and several rotating conveyor frames 23 are fixedly connected by bolts. Therefore, when the rotating conveyor frame 23 rotates, the several rotating conveyor frames 23 will rotate synchronously. Since the rotating ring 231 is fixedly connected with the fixed ring 232, and the fixed ring 234 is fixedly connected with the second impeller blade 235, the first impeller blade 233 and the second impeller blade 235 are oriented in opposite directions. The first impeller blade 233 is fixedly connected to the fixed ring 232, so when the cooling water inside the cooling box 21 is flowing, the first impeller blade 233 will drive the rotating ring 231 through the fixed ring 232 under the drive of the water flow, so that the rotating ring 231 rotates inside the cooling box 21, and the movable ring 234 is slidably connected to the rotating ring 231, and the movable ring 234 is fixedly connected to the second impeller blade 235 in the opposite direction to the first impeller blade 233, so the movable ring 234 will rotate in the opposite direction to the rotating ring 231 under the drive of the second impeller blade 235, so the first impeller blade 233 and the second impeller blade 235 can continuously stir the cooling water in the cooling box 21, so that the heat exchange between the cooling water and the plastic strip is more uniform, ensuring that the heat dissipation efficiency in the cooling water is higher.

[0029] like Figure 7-Figure 11 As shown, a plurality of rollers 236 are rotatably connected to the inside of the rotating ring 231 near the inner side of the first impeller blade 233 and the second impeller blade 235, and the plurality of rollers 236 are parallel to the axial direction of the rotating ring 231. It should be noted that since the plurality of rollers 236 are rotatably connected to the inside of the rotating ring 231 and are parallel to the axial direction of the rotating ring 231, when the rotating ring 231 rotates driven by the first impeller blade 233, the rotating rollers 236 can reduce the friction between the plastic strip and the rotating ring 231, thereby ensuring that the plastic strip can quickly pass through the rotating ring 231.

[0030] Example 4

[0031] like Figure 1-Figure 13As shown, the automatic pelletizing mechanism 3 includes a mechanism body 31, a docking groove 32 that matches the cooling box 21 is opened on one side of the mechanism body 31 near the cooling box 21, a feed trough 33 is opened on the inner side of the docking groove 32, a pelletizing roller 35 is installed on one end of the inner side of the feed trough 33, a collecting chamber 36 is arranged at the bottom of the pelletizing roller 35, a feed conveyor belt 37 is arranged inside the collecting chamber 36, and a discharge trough 311 is opened on the other side of the mechanism body 31 near the top of the feed conveyor belt 37. It should be noted that since the mechanism body 31 is opened on one side near the cooling box 21, the feed conveyor belt 37 is arranged on the inner side of the feed conveyor belt 37. A docking groove 32 is provided which matches the cooling box 21, so that the cooling box 21 can be embedded in the docking groove 32 to ensure that the cooling box 21 can be sealed and connected with the docking groove 32, so that the cooling water in the cooling box 21 can also enter the feed trough 33 through the docking groove 32, and finally enter the collecting chamber 36, and the plastic strips conveyed by the cooling box 21 can enter the feed trough 33, and finally the plastic strips are cut into plastic particles under the operation of the pelletizing roller 35, and the plastic particles will fall on the conveyor belt 37, and be transported to the discharge trough 311 by the conveyor belt 37, so that the collection of plastic particles is realized.

[0032] like Fig.12 As shown, a limiting pressure block 34 is installed in the middle position of the top surface of the feeding trough 33. The limiting pressure block 34 is installed inside the mechanism body 31 through a spring. A limiting wheel can be installed on the bottom surface of the limiting pressure block 34. The limiting wheel can also reduce the friction between the limiting pressure block 34 and the plastic strip in the process of limiting the position of the plastic strip, ensuring that the plastic strip can normally pass through the limiting pressure block 34 and enter the position of the pelletizing roller 35. The elastic force of the spring can act on the limiting pressure block 34 to stabilize the pressure applied by the limiting pressure block 34 to the plastic strip.

[0033] like Fig. 9 and Fig.12 As shown, a power gear 312 is installed on the top surface of the docking groove 32 through a rotating shaft, and a power shaft 313 is meshed with the top surface of the power gear 312, and the bottom surface of the power gear 312 is meshed with its corresponding rotating conveyor frame 23, and a driven shaft 314 is meshed with the middle part of the power shaft 313, and the end of the power shaft 313 away from the power gear 312 is meshed with a third conveying wheel 310, and the third conveying wheel 310 is arranged on the inner side of the conveyor belt 37. It should be noted that a tooth groove can be provided on the side of the rotating conveyor frame 23 close to the power gear 312, and the power gear 312 is meshed with the tooth groove on the side of the rotating conveyor frame 23. In this way, when the rotating conveyor frame 23 rotates, the rotating conveyor frame 23 will also drive the power gear 312 to rotate, and the rotating power gear 312 will drive the power shaft 313 to rotate, so that the power shaft 313 can utilize the flow force of the cooling water in the cooling box 21.

[0034] The inside of the conveyor belt 37 is provided with a first conveying wheel 38, a second conveying wheel 39 and a third conveying wheel 310 from bottom to top. The end of the power shaft 313 away from the power gear 312 is meshed with the third conveying wheel 310 through a bevel gear. When the power shaft 313 rotates, the power shaft 313 drives the third conveying wheel 310 to rotate through the bevel gear. The rotating third conveying wheel 310 drives the conveyor belt 37, so that the conveyor belt 37 can transport the plastic particles into the collecting chamber 36. The specific process is: like Fig.12 As shown, a number of triangular buckets are evenly connected to the side of the conveyor belt 37, and mesh holes are provided on the triangular buckets. When the triangular buckets bring out plastic particles, cooling water can leak back into the collecting chamber 36 through the mesh holes. When the triangular buckets are rotated to the position of the discharge trough 311, the triangular buckets will be in an inverted position, so that the plastic particles in the triangular buckets will automatically leak out of the triangular buckets under the action of gravity and fall on the triangular buckets at the bottom. At this time, the inclined surface of the triangular bucket at the bottom will realize a guiding effect, guiding the plastic particles into the discharge trough 311, thereby realizing the recovery of the plastic particles.

[0035] like Fig.12 and Fig.13 As shown, the pelletizing roller 35 includes a rotating disk 351, and a plurality of cutters 353 are fixedly connected to the inner edge of the rotating disk 351. A connecting shaft 354 is fixedly connected to one end of the rotating disk 351, and the connecting shaft 354 is meshed with the bottom end of the driven shaft 314. There are two groups of rotating disks 351, and the two groups of rotating disks 351 are fixedly connected through a plurality of cutters 353. A connecting rod 352 can also be fixedly connected at the center position between the two groups of rotating disks 351 to ensure the overall strength of the rotating disk 351. It should be noted that the top end of the driven shaft 314 is meshed with the middle position of the power shaft 313 through a bevel gear, so that the rotating power shaft 313 can drive the driven shaft 314 to rotate through the bevel gear, and the bottom end of the driven shaft 314 is meshed with the connecting shaft 354 through the bevel gear, so that the rotating driven shaft 314 can drive the connecting shaft 354 to rotate through the bevel gear, and the rotating connecting shaft 354 can drive the turntable 351 to rotate. The rotating turntable 351 can also drive the plurality of cutters 353 fixedly connected to the inner edge of the turntable 351 to rotate. The rotating plurality of cutters 353 can continuously cut the plastic strips conveyed by the feed trough 33, and cut the plastic strips into plastic particles. In order to ensure the uniformity of the plastic particles, a friction block is arranged inside the cooling box 21, and the rotation speed of the rotating conveying frame 23 is controlled by the friction block, thereby indirectly realizing the control of the rotation speed of the turntable 351. The automatic pelletizing mechanism 3 realizes underwater automatic pelletizing of the plastic strips by absorbing the flow force of the cooling water inside the cooling box 21, and also realizes automatic conveying of the plastic particles, thereby greatly reducing the energy consumption of the automatic pelletizing mechanism 3.

[0036] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. Underwater pelletizer with integrated start-up valve and plate-changing valve, characterized in that: include: An integrated extrusion mechanism (1) comprises a start valve assembly (11) and a plate change valve assembly (12); A cooling mechanism (2), which is arranged on one side of the integrated extrusion mechanism (1) and is used to cool the plastic strip extruded by the integrated extrusion mechanism (1); An automatic pelletizing mechanism (3) is arranged at one end of the cooling mechanism (2) away from the integrated extrusion mechanism (1), and the automatic pelletizing mechanism (3) utilizes the water flow power inside the cooling mechanism (2) to automatically pelletize the plastic strips; The automatic pelletizing mechanism (3) comprises a mechanism body (31), a docking groove (32) matched with the cooling mechanism (2) is provided on one side of the mechanism body (31) near the cooling mechanism (2), a feed trough (33) is provided on the inner side of the docking groove (32), a pelletizing roller (35) is installed on one end of the inner side of the feed trough (33), a collection chamber (36) is provided at the bottom of the pelletizing roller (35), a feed conveyor belt (37) is provided inside the collection chamber (36), and a discharge trough (311) is provided on the other side of the mechanism body (31) near the top of the feed conveyor belt (37).

2. The underwater pelletizer with integrated start-up valve and plate-changing valve according to claim 1, characterized in that: The start-up valve assembly (11) comprises a start-up valve body (111), an extrusion channel (112) passing through the center position of the start-up valve body (111), a vertical frame (113) fixedly connected to the top surface of the start-up valve body (111), a vertical hydraulic valve (114) bolted to the top surface of the vertical frame (113), and the vertical hydraulic valve (114) connected to an isolation baffle (115) via a hydraulic rod.

3. The underwater pelletizer with integrated start-up valve and plate-changing valve according to claim 2 is characterized in that: The plate-changing valve assembly (12) comprises a plate-changing frame (121), the plate-changing frame (121) being horizontally mounted on a side of a start-up valve body (111), one end of the plate-changing frame (121) being bolted to a horizontal hydraulic cylinder (122), the horizontal hydraulic cylinder (122) being connected to an extrusion die plate (123) via a hydraulic rod, and a plate-changing groove (116) matching the extrusion die plate (123) being provided on a side of the start-up valve body (111) near the extrusion die plate (123).

4. The underwater pelletizer with integrated start-up valve and plate-changing valve according to claim 1, characterized in that: The cooling mechanism (2) comprises a plurality of cooling boxes (21) butted against each other, one end of the cooling box (21) being fixedly connected to a butting plate (22), and a rotating conveying frame (23) being installed inside the cooling box (21) via a bearing.

5. The underwater pelletizer with integrated start-up valve and plate-changing valve according to claim 4 is characterized in that: The rotating conveying frame (23) comprises a rotating ring (231), a fixed ring (232) and a movable ring (234) are arranged inside the rotating ring (231), a first impeller blade (233) is fixedly connected to the fixed ring (232), and a second impeller blade (235) is fixedly connected to the movable ring (234), and the first impeller blade (233) and the second impeller blade (235) are oriented in opposite directions.

6. The underwater pelletizer with integrated start-up valve and plate-changing valve according to claim 5, characterized in that: A plurality of rollers (236) are rotatably connected to the inside of the rotating ring (231) near the first impeller blade (233) and the inner side of the second impeller blade (235), and the plurality of rollers (236) are parallel to the axial direction of the rotating ring (231).

7. The underwater pelletizer with integrated start-up valve and plate-changing valve according to claim 1, characterized in that: A limiting pressure block (34) is installed at the middle of the top surface of the material conveying trough (33).

8. The underwater pelletizer with integrated start-up valve and plate-changing valve according to claim 4, characterized in that: A power gear (312) is mounted on the top surface of the docking groove (32) via a rotating shaft, a power shaft (313) is meshed on the top surface of the power gear (312), a bottom surface of the power gear (312) is meshed with a corresponding rotating conveying frame (23), a driven shaft (314) is meshed in the middle of the power shaft (313), and a third conveying wheel (310) is meshed at one end of the power shaft (313) away from the power gear (312), and the third conveying wheel (310) is arranged on the inner side of the conveyor belt (37).

9. The underwater pelletizer with integrated start-up valve and plate-changing valve according to claim 8, characterized in that: The pelletizing roller (35) comprises a rotating disk (351), a plurality of cutters (353) are fixedly connected to the inner edge of the rotating disk (351), and a connecting shaft (354) is fixedly connected to one end of the rotating disk (351), and the connecting shaft (354) is meshed with the bottom end of the driven shaft (314).

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