A high-efficiency breaking device for polyester resin particles

Abstract

The utility model discloses a kind of high-efficiency crushing device of polyester resin particles, it is related to the technical field of polyester resin particle crushing. Including: the pulverization cavity and front cover of constituting pulverization chamber, front cover is used to cover pulverization cavity to constitute the pulverization chamber of crushing polyester resin particles, annular screen is provided in pulverization cavity;Activity tooth disc is provided in pulverization cavity, activity tooth disc is inside annular screen, a plurality of activity teeth are provided on activity tooth disc, a plurality of activity teeth are annularly distributed and set on activity tooth disc and are arranged with two layers of activity teeth of inner ring layer and outer ring layer, two layers of activity teeth of inner ring layer and outer ring layer and activity tooth disc are coaxially arranged, activity tooth is triangular structure;Fixed tooth disc is provided on front cover, fixed tooth disc and activity tooth disc are coaxially arranged, a plurality of fixed teeth are provided on fixed tooth disc, to two fixed teeth as a group, so that multiple groups of fixed teeth are annularly distributed and set on fixed tooth disc and are arranged with two layers of fixed teeth of inner ring layer and outer ring layer.

Description

Technical Field

[0001] This utility model relates to the field of polyester resin particle crushing technology, and in particular to a high-efficiency crushing device for polyester resin particles. Background Technology

[0002] Polyester resin granules are a general term for high molecular weight compound particles formed by the condensation polymerization of diols, diacids, or polyols and polyacids. Polyester resin granules possess high chemical stability, physical properties, and processability, and are widely used in industries such as plastics products, textile fibers, coatings, and electronic materials. When used in different industries, polyester resin granules require crushing or pulverizing processes to refine their volume and meet specific application requirements.

[0003] Universal pulverizers are commonly used to crush polyester resin particles. These pulverizers utilize the high-speed relative motion between a moving and a fixed toothed disc to pulverize the material through a combination of tooth impact, friction, and mutual impact. However, existing universal pulverizers have some technical problems when crushing polyester resin particles. After the pulverizer starts operating, some crushed polyester resin particles do not reach the required particle size and cannot pass through the pulverizer's screen. Instead, they tend to adhere to the inside of the pulverizer's grinding chamber and to the moving and fixed teeth, preventing effective crushing and discharge. This further reduces the pulverizing efficiency of the polyester resin particles.

[0004] Therefore, based on the above-mentioned technical problems, those skilled in the art urgently need to develop a high-efficiency crushing device for polyester resin particles. Utility Model Content

[0005] The purpose of this invention is to provide a high-efficiency crushing device for polyester resin particles that can prevent crushed polyester resin particles from adhering to the inside of the crushing device to ensure crushing efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model discloses a high-efficiency crushing device for polyester resin particles, comprising:

[0008] A crushing chamber and a front cover constitute the crushing chamber, the front cover being used to seal the crushing chamber to form a crushing chamber for crushing polyester resin particles, and an annular screen being provided inside the crushing chamber;

[0009] The grinding chamber is provided with a movable toothed disc, which is located inside the annular screen. The movable toothed disc is provided with multiple movable teeth, which are arranged in a circular pattern and have two layers of movable teeth: an inner ring layer and an outer ring layer. The two layers of movable teeth and the movable toothed disc are coaxially arranged. The movable teeth have a triangular structure.

[0010] The front cover is provided with a fixed toothed disc, which is coaxially arranged with the movable toothed disc. The fixed toothed disc is provided with multiple fixed teeth, with two fixed teeth forming a group, so that the multiple groups of fixed teeth are arranged in a ring on the fixed toothed disc and have two layers of fixed teeth, an inner ring layer and an outer ring layer. The two layers of fixed teeth, the inner ring layer and the outer ring layer, and the fixed toothed disc are coaxially arranged. A gap is left between two fixed teeth in a group of fixed teeth to allow the movable tooth at the corresponding ring layer position to pass through.

[0011] The gap between two fixed teeth in a set of fixed teeth is set to gradually decrease in the direction of rotation of the movable teeth.

[0012] Furthermore, an annular groove is provided on the inner side of the crushing chamber for installing the annular screen, and a gap is left between the outer side of the annular screen and the annular groove to allow material to pass through.

[0013] Furthermore, a feed inlet communicating with the annular groove is provided at the bottom of the crushing chamber and below the annular screen.

[0014] Furthermore, a feeding hopper is provided on the front cover, and the lower end of the feeding hopper extends downward to the center of the front cover on one side facing the crushing chamber to connect with the crushing chamber.

[0015] Furthermore, the movable tooth of the triangular structure is an acute triangle with the acute angle end of the movable tooth facing the front end in the direction of rotation. The acute angle end of the movable tooth is close to one of the fixed teeth located in the outer ring position of a set of fixed teeth. The other two corners of the movable tooth, excluding the acute angle end, are respectively close to two fixed teeth in a set of fixed teeth.

[0016] Furthermore, the movable toothed disc is rotatably disposed in the crushing chamber via a drive shaft, and the drive shaft is rotatably disposed on the crushing chamber in the opposite direction to the back side of the front cover via a bearing and is driven to rotate by a motor. An air cavity is left between the movable toothed disc and the back side of the crushing chamber to allow compressed air to enter.

[0017] Furthermore, the movable toothed disc is provided with multiple compressed air inlet holes, and a compressed air delivery pipe is connected to the back side of the pulverizing chamber, which is connected to an external air compressor.

[0018] Furthermore, the compressed air inlet hole has a conical hole structure and the relatively small hole diameter end is set towards the inside of the pulverizing chamber.

[0019] This utility model has the following beneficial effects.

[0020] The crushing device of this utility model achieves the effect of crushing polyester resin particles through the relative movement between the movable teeth and the fixed teeth. The relative positional relationship between the movable teeth and the fixed teeth creates a high-speed airflow in the form of instantaneous compressed air during the movement, which carries away the polyester resin particles adhering to the movable teeth and the fixed teeth. At the same time, compressed air is further injected through the compressed air inlet to blow the polyester resin particles inside the crushing device, further preventing the crushed polyester resin particles from adhering to the inside of the crushing device and ensuring crushing efficiency. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0022] Figure 1 A schematic diagram of the structure of a high-efficiency crushing device for polyester resin particles provided in an embodiment of this utility model;

[0023] Figure 2 A schematic diagram showing the positional relationship between the movable teeth and the fixed teeth of a high-efficiency crushing device for polyester resin particles provided in an embodiment of this utility model;

[0024] Figure 3 A cross-sectional view of the crushing chamber and front cover of a high-efficiency crushing device for polyester resin particles provided in an embodiment of this utility model.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Crushing chamber; 2. Front cover; 3. Annular screen; 4. Movable toothed disc; 5. Movable tooth; 6. Fixed toothed disc; 7. Fixed tooth; 8. Annular groove; 9. Feed port; 10. Feed hopper; 11. Drive shaft; 12. Compressed air inlet; 13. Compressed air delivery pipe. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solution of this utility model, a further detailed description of this utility model will be provided below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] See Figures 1 to 3 As shown;

[0029] This embodiment discloses a high-efficiency crushing device for polyester resin particles, comprising:

[0030] The crushing chamber consists of a crushing chamber 1 and a front cover 2. The front cover 2 is used to cover the crushing chamber 1 to form a crushing chamber for crushing polyester resin particles. This is the conventional structure of the universal crusher in the prior art. The polyester resin particles are crushed in the crushing chamber. An annular screen 3 is set in the crushing chamber 1. After the polyester resin particles are crushed, qualified particles are screened out through the annular screen 3 and discharged from the crushing chamber to complete the crushing.

[0031] A movable toothed disc 4 is installed inside the crushing chamber 1. The movable toothed disc 4 is located inside the annular screen 3. Multiple movable teeth 5 are provided on the movable toothed disc 4. The multiple movable teeth 5 are arranged in a circular pattern on the movable toothed disc 4 and have two layers of movable teeth 5, an inner ring layer and an outer ring layer. The inner ring layer and the outer ring layer of movable teeth 5 and the movable toothed disc 4 are coaxially arranged. It is equivalent to the multiple movable teeth 5 being arranged in two annular rings on the same axis, so as to rotate coaxially with the movable toothed disc 4. The movable teeth 5 have a triangular structure.

[0032] A fixed toothed disc 6 is provided on the front cover 2. The fixed toothed disc 6 and the movable toothed disc 4 are coaxially arranged. Multiple fixed teeth 7 are provided on the fixed toothed disc 6. Two fixed teeth 7 are arranged as a group, and multiple groups of fixed teeth 7 are arranged in a ring on the fixed toothed disc 6. There are two layers of fixed teeth 7, an inner ring layer and an outer ring layer. The inner ring layer and the outer ring layer of fixed teeth 7 and the fixed toothed disc 6 are coaxially arranged. A gap is left between two fixed teeth 7 in a group of fixed teeth 7 so that the movable teeth 5 at the corresponding ring layer position can pass through.

[0033] Among them, the gap between two fixed teeth 7 in a set of fixed teeth 7 is set to gradually decrease in the direction of rotation of the movable teeth 5.

[0034] Specifically, the fixed toothed disc 6 and the movable toothed disc 4 rotate coaxially relative to each other, causing multiple movable teeth 5 and multiple sets of fixed teeth 7 to also rotate coaxially relative to each other. As a result, the movable teeth 5 pass through the gap between a set of fixed teeth 7 during rotation. Due to the distribution of the two fixed teeth 7 in a set of fixed teeth 7, the movable teeth 5 enter from the end of the larger gap of the set of fixed teeth 7. During the process of moving to the end of the smaller gap, the accommodating space gradually decreases. Under the high-speed rotation of the movable teeth 5, the air is compressed, increasing the air velocity. This high-velocity air carries away the polyester resin particles attached to the movable teeth 5 and the fixed teeth 7, allowing the polyester resin particles to re-enter the crushing chamber for crushing and improving the crushing efficiency.

[0035] Furthermore, an annular groove 8 is provided on the inner side of the crushing chamber 1 for installing an annular screen 3. A gap is left between the outer side of the annular screen 3 and the annular groove 8 to allow material to pass through, so that the crushed particles that meet the requirements are discharged through the annular screen 3 into the annular groove 8 for discharge and the crushing device to complete the crushing process.

[0036] Furthermore, a discharge port 9, which is connected to the annular groove 8, is provided at the bottom of the crushing chamber 1 and below the annular screen 3. After crushing, particles that meet the requirements are discharged through the annular screen 3 into the annular groove 8, and finally discharged from the crushing device through the discharge port 9 for collection.

[0037] Furthermore, a feed hopper 10 is provided on the front cover 2. The lower end of the feed hopper 10 extends downward to the center of the front cover 2 on the side facing the crushing chamber 1 to connect with the crushing chamber, so that the polyester resin particles to be crushed enter the crushing chamber from the feed hopper 10 for crushing.

[0038] Furthermore, the movable tooth 5 with its triangular structure is an acute triangle with its acute angle facing the front end in the direction of rotation. The acute angle of the movable tooth 5 is positioned close to one of the fixed teeth 7 located on the outer ring of a set of fixed teeth 7. The other two corners of the movable tooth 5 are positioned close to two of the fixed teeth 7 in the set of fixed teeth 7. By designing the movable tooth 5 as an acute triangle and extending its length along the direction of rotation, it is precisely positioned to compress air between the set of fixed teeth 7. Similarly, the fixed teeth 7 are also extended to ensure sufficient space for air compression during the movement of the movable tooth 5, making it easier to generate a high-speed airflow. Simultaneously, two corners of the triangular movable tooth 5 quickly pass through one of the fixed teeth 7 located on the outer ring of the set of fixed teeth 7, effectively doubling the crushing efficiency and thus improving the overall crushing efficiency of polyester resin particles.

[0039] Furthermore, the movable toothed disc 4 is rotatably mounted in the crushing chamber 1 via the drive shaft 11. The drive shaft 11 is rotatably mounted on the crushing chamber 1 on the back side of the front cover 2 via a bearing and is driven to rotate by a motor. Specifically, the bearing on the drive shaft 11 can be a sealed bearing, and an air cavity is left between the movable toothed disc 4 and the back side of the crushing chamber 1 to allow compressed air to enter.

[0040] Furthermore, multiple compressed air inlet holes 12 are provided on the movable toothed disc 4, and a compressed air delivery pipe 13 is connected to the back side of the crushing chamber 1, which is connected to an external air compressor.

[0041] Furthermore, the compressed air inlet 12 has a conical hole structure and the relatively small hole diameter end is set towards the inside of the crushing chamber.

[0042] Specifically, this device uses an external air compressor to inject compressed air into the air chamber of the crushing chamber 1 through the compressed air delivery pipe 13. The compressed air entering the air chamber then rapidly enters the crushing chamber through the compressed air inlet 12, forming a high-speed airflow. This airflow blows away the polyester resin particles adhering to the entire crushing chamber for further crushing, preventing the crushed polyester resin particles from adhering to the inside of the crushing device and ensuring crushing efficiency. The movable toothed disc 4 separates the compressed air in the air chamber from the annular screen 3. The compressed air entering through the compressed air inlet 12 forms a high-speed airflow in the crushing chamber and then exits through the annular screen 3 and the discharge port 9. This process also helps the crushed polyester resin particles pass through the annular screen 3, improving the crushing efficiency of the device. Additionally, some airflow also enters the feed hopper 10. Therefore, a cover can be designed on the top of the feed hopper 10, or the feed hopper 10 can be sealed during operation and after feeding to prevent the polyester resin particles from being carried out. The air compressor can operate intermittently to treat the material adhering to the crushing chamber intermittently, so as not to affect normal crushing operations.

[0043] In the above technical solution, the high-efficiency crushing device for polyester resin particles provided by this utility model has the following beneficial effects:

[0044] The crushing device of this utility model achieves the effect of crushing polyester resin particles through the relative movement between the movable teeth and the fixed teeth. The relative positional relationship between the movable teeth and the fixed teeth creates a high-speed airflow in the form of instantaneous compressed air during the movement, which carries away the polyester resin particles adhering to the movable teeth and the fixed teeth. At the same time, compressed air is further injected through the compressed air inlet to blow the polyester resin particles inside the crushing device, further preventing the crushed polyester resin particles from adhering to the inside of the crushing device and ensuring crushing efficiency.

[0045] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A high-efficiency crushing device for polyester resin particles, characterized in that, include: The crushing chamber (1) and the front cover (2) constitute the crushing chamber. The front cover (2) is used to cover the crushing chamber (1) to form a crushing chamber for crushing polyester resin particles. An annular screen (3) is provided inside the crushing chamber (1). The grinding chamber (1) is provided with a movable toothed disc (4), which is located inside the annular screen (3). The movable toothed disc (4) is provided with multiple movable teeth (5). The multiple movable teeth (5) are arranged in a circular pattern on the movable toothed disc (4) and have two layers of movable teeth (5), an inner ring layer and an outer ring layer. The two layers of movable teeth (5) and the movable toothed disc (4) are coaxially arranged. The movable teeth (5) have a triangular structure. A fixed toothed disc (6) is provided on the front cover (2). The fixed toothed disc (6) and the movable toothed disc (4) are coaxially arranged. Multiple fixed teeth (7) are provided on the fixed toothed disc (6). Two fixed teeth (7) are arranged as a group, and multiple groups of fixed teeth (7) are arranged in a ring on the fixed toothed disc (6). There are two layers of fixed teeth (7) in the inner ring layer and the outer ring layer. The two layers of fixed teeth (7) in the inner ring layer and the outer ring layer and the fixed toothed disc (6) are coaxially arranged. A gap is left between two fixed teeth (7) in a group of fixed teeth (7) to allow the movable tooth (5) at the corresponding ring layer position to pass through. Among them, the gap between two fixed teeth (7) in a set of fixed teeth (7) is set to gradually decrease in the direction of rotation of the movable tooth (5).

2. The high-efficiency crushing device for polyester resin particles according to claim 1, characterized in that, The inner side of the crushing chamber (1) is provided with an annular groove (8) for installing the annular screen (3), and a gap is left between the outer side of the annular screen (3) and the annular groove (8) to allow the material to pass through.

3. The high-efficiency crushing device for polyester resin particles according to claim 2, characterized in that, The bottom of the crushing chamber (1) and below the annular screen (3) is provided with a discharge port (9) that communicates with the annular groove (8).

4. The high-efficiency crushing device for polyester resin particles according to claim 1, characterized in that, The front cover (2) is provided with a feeding hopper (10), and the lower end of the feeding hopper (10) extends downward to the center of the front cover (2) on one side facing the crushing chamber (1) to connect with the crushing chamber.

5. The high-efficiency crushing device for polyester resin particles according to claim 1, characterized in that, The movable tooth (5) of the triangular structure is an acute triangle with the acute angle end of the movable tooth (5) facing the front end of the rotation direction. The acute angle end of the movable tooth (5) is close to one of the fixed teeth (7) in the outer ring position of a set of fixed teeth (7). The other two corners of the movable tooth (5) are close to two fixed teeth (7) in the set of fixed teeth (7).

6. The high-efficiency crushing device for polyester resin particles according to claim 1, characterized in that, The movable toothed disc (4) is rotatably disposed in the crushing chamber (1) via a drive shaft (11). The drive shaft (11) is rotatably disposed on the crushing chamber (1) in the opposite direction to the back side of the front cover (2) via a bearing and is driven to rotate by a motor. An air cavity is left between the movable toothed disc (4) and the back side of the crushing chamber (1) to allow compressed air to enter.

7. The high-efficiency crushing device for polyester resin particles according to claim 6, characterized in that, The movable toothed disc (4) is provided with multiple compressed air inlet holes (12), and a compressed air delivery pipe (13) is connected to the back side of the crushing chamber (1), which is connected to an external air compressor.

8. The high-efficiency crushing device for polyester resin particles according to claim 7, characterized in that, The compressed air inlet (12) has a conical hole structure and the relatively small hole diameter end is set towards the inside of the crushing chamber.

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