Underwater pelletizing device with blades convenient to replace

Abstract

The underwater pelletizing device comprises a transmission shaft, a key groove is formed in one end of the transmission shaft, the other end of the transmission shaft is fixedly connected with an assembly shaft, a plurality of clamping blocks are arranged on the side wall of the assembly shaft, a tool apron is arranged on the assembly shaft in a sleeved mode, and the tool apron is fixedly connected with the key groove. A plurality of attaching blocks are arranged on the inner wall of the tool apron, and the assembling shaft is connected with the tool apron through a limiting device. By means of the clamping blocks and the attaching blocks, when the tool apron is installed, the clamping blocks and the attaching blocks are inserted into the corresponding grooves respectively, the contact area of the connecting position can be increased, the connecting stability can be improved, different inserting depths can be controlled and adjusted, the threaded rod is driven to rotate by screwing the rotary knob, and the tool apron is installed conveniently. And finally, the position of the tool apron is fixed through the abutting block, so that the position of the tool apron is adjusted, the distance between the tool apron and the melt is adjusted according to the cutting state of the melt and the abrasion degree of the blade, and the cutting quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of underwater pelletizing devices, in particular to an underwater pelletizing device which is convenient for replacing blades. Background Art

[0002] At present, the processing of plastic products in my country is largely the processing of plastic powder after plasticization. The extruder is the most widely used equipment in polymer processing. After the polymer is mixed with various additives, it is sent to the extruder for melting and further mixed evenly. It passes through a multi-hole die to form multiple strips, and then cut into pellets. There are hot-cut pellets and cold-cut pellets. Among them, hot-cut pellets are cut with blades while cooling with air or water after the strips leave the die. Underwater pelletizer is a plastic particle hot cutting equipment commonly used in the plastic granulation industry. As an innovative equipment for cutting and crushing granular materials underwater, it combines modern processing technology and environmental protection concepts, and has attracted widespread attention for its high efficiency, energy saving and environmental protection.

[0003] During the operation of the underwater pelletizer, the cutter is in contact with the melt in the water for a long time, which is prone to corrosion and thus reduces the cutting quality. Therefore, the blade needs to be replaced. The existing blade is usually fixedly connected to the external drive device through multiple sets of bolts, and rotates at high speed in the water to complete the pelletizing. When replacing, it is necessary to use tools to disassemble the bolts at different positions respectively, which is time-consuming and labor-intensive. In addition, the bolts are easily corroded when immersed in water, which increases the difficulty of disassembly. In view of this, the present application proposes an underwater pelletizer that is easy to replace the blade. Utility Model Content

[0004] The purpose of the utility model is to provide an underwater pelletizing device with easy replacement of blades, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an underwater pelletizing device that is easy to replace blades, comprising a transmission shaft, a key slot is provided at one end of the transmission shaft, an assembly shaft is fixedly connected to the other end of the transmission shaft, a plurality of clamping blocks are arranged on the side wall of the assembly shaft, a knife seat is sleeved on the assembly shaft, a plurality of fitting blocks are arranged on the inner wall of the knife seat, and the assembly shaft is connected to the knife seat through a limiting device, a cover plate is sealingly connected to the knife seat, a plurality of extension plates are circumferentially arranged on the side wall of the knife seat, and the plurality of extension plates are respectively installed with blades through fasteners, a threaded sleeve is sleeved on the transmission shaft, and the threaded sleeve is fixedly connected to an auxiliary frame.

[0006] As a further preferred embodiment of the technical solution, the plurality of clamping blocks and the fitting blocks are all arranged circumferentially, and the positions of the clamping blocks correspond to the gap between the two fitting blocks. By simultaneously moving the plurality of clamping blocks and the fitting blocks into the gap at the corresponding positions, the stability of the connection between the assembly shaft and the knife seat can be effectively improved, and the looseness of the connection caused by the vibration generated by the blade during cutting can be reduced.

[0007] As a further preferred embodiment of the present technical solution, the limiting device includes a threaded rod, and the threaded rod passes through the knife seat, one end of the threaded rod is fixedly connected to a knob, and the other end of the threaded rod is fixedly connected to a stop block, and the stop block is made of rubber material and is designed as a sphere. The threaded rod can be driven to rotate synchronously by turning the knob, and the stop block designed as a sphere can ensure that there is sufficient contact surface at any angle, and can be deformed to increase the friction between the contact surfaces, providing a better fixing effect.

[0008] As a further preferred embodiment of the present technical solution, an internal threaded hole is provided on the side wall of the knife seat, and the threaded rod is threadedly connected and arranged in the internal threaded hole. Through the limitation of the internal threaded hole, when the threaded rod rotates, it also moves along the direction set by itself, and finally drives the abutment block to adjust its position.

[0009] As a further preferred embodiment of the present technical solution, a limiting groove is provided on the side wall of the assembly shaft, one end of the threaded rod extends into the limiting groove, and the side wall of the abutment block abuts against the inner wall of the limiting groove. The threaded rod drives the abutment block to move, which can ultimately play a limiting role, so that the assembly shaft and the knife seat are fixed, ensuring that the blade remains stable during operation.

[0010] As a further preferred embodiment of the present technical solution, a threaded portion is provided on the transmission shaft, and the position of the threaded portion corresponds to the position of the threaded sleeve. The threaded sleeve can be rotated to move along the direction in which the transmission shaft is set, thereby driving the auxiliary frame to move synchronously.

[0011] As a further preferred embodiment of the present technical solution, a groove is provided on the side wall of the knife seat, a rubber pad is provided in the circumferential direction of the groove, and the end of the auxiliary frame away from the threaded sleeve extends into the groove and abuts against the rubber pad. By abutting the side wall of the auxiliary frame against the rubber pad and cooperating with the cover plate installed in a sealing manner on the other side, the connection between the assembly shaft and the knife seat can be placed in a closed space to avoid corrosion during long-term underwater operation, thereby increasing the difficulty of subsequent disassembly.

[0012] The utility model provides an underwater pelletizing device which is convenient for replacing blades and has the following beneficial effects:

[0013] (1) The utility model provides a plurality of clamping blocks and fitting blocks. When installing the tool holder, the clamping blocks and fitting blocks are respectively inserted into corresponding grooves, which can increase the contact area of ​​the connection, improve the stability of the connection, and control and adjust different insertion depths. Then, the knob is turned to drive the threaded rod to rotate, and finally the position of the tool holder is fixed by the abutment block, thereby adjusting the position of the tool holder. The distance between the tool holder and the melt is adjusted according to the cutting state of the melt and the wear degree of the blade, thereby improving the cutting quality.

[0014] (2) The utility model provides a threaded sleeve, an auxiliary frame and a rubber pad. Under the limit of the threaded portion on the transmission shaft, the threaded sleeve is turned to drive the auxiliary frame to move, and finally the auxiliary frame and the rubber pad are pushed against each other, so that a closed space is formed at the connection between the assembly shaft and the tool holder. During the working process, the contact with the water body is reduced, and the corrosion of the connection is avoided, thereby increasing the difficulty of disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0016] Figure 2 It is a rear view structural schematic diagram of the utility model;

[0017] Figure 3 It is a left sectional structural schematic diagram of the utility model;

[0018] Figure 4 for Figure 3 A schematic diagram of the structure enlargement at the center A;

[0019] Figure 5 It is a partial cross-sectional structural schematic diagram of the utility model;

[0020] Figure 6 It is a structural schematic diagram of the transmission shaft in the utility model.

[0021] In the figure: 1. transmission shaft; 2. keyway; 3. threaded part; 4. assembly shaft; 5. clamping block; 6. tool holder; 7. fitting block; 8. limiting groove; 9. internal threaded hole; 10. threaded rod; 11. knob; 12. abutment block; 13. extension plate; 14. fastener; 15. blade; 16. threaded sleeve; 17. auxiliary frame; 18. groove; 19. rubber pad; 20. cover plate. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0023] The utility model provides a technical solution: Figure 1 and Figure 6As shown, in this embodiment, an underwater pelletizing device that is easy to replace a blade includes a transmission shaft 1, a key slot 2 is provided at one end of the transmission shaft 1, an assembly shaft 4 is fixedly connected to the other end of the transmission shaft 1, a plurality of clamping blocks 5 are provided on the side wall of the assembly shaft 4, a knife seat 6 is sleeved on the assembly shaft 4, a plurality of fitting blocks 7 are provided on the inner wall of the knife seat 6, and the assembly shaft 4 is connected to the knife seat 6 through a limiting device, a cover plate 20 is sealingly connected to the knife seat 6, a plurality of extension plates 13 are circumferentially provided on the side wall of the knife seat 6, and the plurality of extension plates 13 are respectively installed with blades 15 through fasteners 14, a threaded sleeve 16 is sleeved on the transmission shaft 1, and the threaded sleeve 16 is fixedly connected to an auxiliary frame 17.

[0024] The plurality of clamping blocks 5 and the bonding blocks 7 are all circumferentially arranged, and the position of the clamping block 5 corresponds to the gap between two bonding blocks 7 .

[0025] By simultaneously moving the plurality of clamping blocks 5 and the fitting blocks 7 into the gaps at the corresponding positions, the stability of the connection between the assembly shaft 4 and the knife seat 6 can be effectively improved, and loosening of the connection caused by vibration generated by the blade 15 during cutting can be reduced.

[0026] Among them, the limiting device includes a threaded rod 10, and the threaded rod 10 passes through the knife seat 6. One end of the threaded rod 10 is fixedly connected to a knob 11, and the other end of the threaded rod 10 is fixedly connected to a stop block 12. The stop block 12 is made of rubber material and is designed as a sphere.

[0027] The threaded rod 10 can be driven to rotate synchronously by turning the knob 11. The spherical abutment block 12 can ensure sufficient contact surface at any angle and can deform to increase the friction between the contact surfaces, thereby providing a better fixing effect.

[0028] An internal threaded hole 9 is provided on the side wall of the tool holder 6 , and a threaded rod 10 is threadedly connected and disposed in the internal threaded hole 9 .

[0029] Through the limitation of the internal threaded hole 9, when the threaded rod 10 rotates, it also moves along its own set direction, and finally drives the abutment block 12 to adjust its position.

[0030] A limiting groove 8 is provided on the side wall of the assembly shaft 4 , one end of the threaded rod 10 extends into the limiting groove 8 , and the side wall of the abutment block 12 abuts against the inner wall of the limiting groove 8 .

[0031] The threaded rod 10 drives the abutment block 12 to move, and finally plays a limiting role, so that the assembly shaft 4 and the knife seat 6 are fixed, ensuring that the blade 15 remains stable during operation.

[0032] A threaded portion 3 is provided on the transmission shaft 1 , and the position of the threaded portion 3 corresponds to the position of the threaded sleeve 16 .

[0033] The external threaded sleeve 16 can be rotated to move along the direction in which the transmission shaft 1 is set, thereby driving the auxiliary frame 17 to move synchronously.

[0034] A groove 18 is formed on the side wall of the tool holder 6 , a rubber pad 19 is circumferentially arranged in the groove 18 , and one end of the auxiliary frame 17 away from the threaded sleeve 16 extends into the groove 18 and abuts against the rubber pad 19 .

[0035] By abutting the side wall of the auxiliary frame 17 against the rubber pad 19 and cooperating with the cover plate 20 installed in a sealing manner on the other side, the connection between the assembly shaft 4 and the knife seat 6 can be placed in a closed space to avoid corrosion during long-term underwater operation, thereby increasing the difficulty of subsequent disassembly.

[0036] The utility model provides an underwater pelletizing device that is easy to replace blades. The specific working principle is as follows: a transmission shaft 1 is connected to an output shaft of an external driving motor through a keyway 2, and the output shaft of the motor finally drives a knife seat 6 to rotate synchronously. Blades 15 respectively mounted on an extension plate 13 through a plurality of fasteners 14 cut the extruded melt. After long-term operation, the blades 15 will produce different degrees of wear, so it is necessary to replace the blades 15. The knobs 11 on both sides are respectively turned to drive the threaded rod 10 to rotate synchronously. Under the limit of the internal threaded hole 9, the threaded rod 10 will move, and finally drive the abutment block 12 to move out of the limit groove 8, and the abutment block 12 is disconnected from the inner wall of the limit groove 8. The assembly shaft 4 and the knife seat 6 are no longer fixed. At this time, the knife seat 6 is moved to the other side of the transmission shaft 1, and the blade 15 can be removed and replaced more conveniently. When the replacement is completed and installed again, the clamping block 5 and the fitting block 7 are respectively inserted into the corresponding gaps, and the knob 11 is turned in the opposite direction to drive the abutment block 12 to abut against the inner wall of the limiting groove 8 to complete the installation of the knife seat 6. The threaded sleeve 16 is turned to drive the auxiliary frame 17 to move, so that the side wall of the auxiliary frame 17 extends into the groove 18 and abuts against the rubber pad 19. Under the joint action of the cover plate 20 on the other side, a closed space is formed at the connection between the assembly shaft 4 and the knife seat 6 to avoid corrosion during underwater work and reduce the difficulty of subsequent disassembly.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An underwater pelletizing device for facilitating blade replacement, comprising a transmission shaft (1), characterized in that: A keyway (2) is provided at one end of the transmission shaft (1), and an assembly shaft (4) is fixedly connected to the other end of the transmission shaft (1). A plurality of clamping blocks (5) are arranged on the side wall of the assembly shaft (4). A knife seat (6) is sleeved on the assembly shaft (4), and a plurality of fitting blocks (7) are arranged on the inner wall of the knife seat (6). The assembly shaft (4) is connected to the knife seat (6) via a limiting device. A cover plate (20) is sealingly connected to the knife seat (6). A plurality of extension plates (13) are circumferentially arranged on the side wall of the knife seat (6), and blades (15) are respectively installed on the plurality of extension plates (13) via fasteners (14). A threaded sleeve (16) is sleeved on the transmission shaft (1), and the threaded sleeve (16) is fixedly connected to an auxiliary frame (17).

2. The underwater pelletizing device with easy blade replacement according to claim 1, characterized in that: The plurality of clamping blocks (5) and the bonding blocks (7) are all arranged circumferentially, and the position of the clamping block (5) corresponds to the gap between the two bonding blocks (7).

3. The underwater pelletizing device with easy blade replacement according to claim 1, characterized in that: The limiting device comprises a threaded rod (10), and the threaded rod (10) passes through the knife seat (6), one end of the threaded rod (10) is fixedly connected to a knob (11), and the other end of the threaded rod (10) is fixedly connected to a stop block (12), and the stop block (12) is made of rubber material and is designed as a sphere.

4. The underwater pelletizing device with easy blade replacement according to claim 3, characterized in that: An internal threaded hole (9) is provided on the side wall of the knife seat (6), and the threaded rod (10) is threadedly connected and arranged in the internal threaded hole (9).

5. The underwater pelletizing device with easy blade replacement according to claim 3, characterized in that: A limiting groove (8) is provided on the side wall of the assembly shaft (4), one end of the threaded rod (10) extends into the limiting groove (8), and the side wall of the abutment block (12) abuts against the inner wall of the limiting groove (8).

6. The underwater pelletizing device with easy blade replacement according to claim 1, characterized in that: The transmission shaft (1) is provided with a threaded portion (3), and the position of the threaded portion (3) corresponds to the position of the threaded sleeve (16).

7. The underwater pelletizing device with easy blade replacement according to claim 1, characterized in that: A groove (18) is provided on the side wall of the knife seat (6), a rubber pad (19) is arranged circumferentially in the groove (18), and one end of the auxiliary frame (17) away from the threaded sleeve (16) extends into the groove (18) and abuts against the rubber pad (19).

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