Multistage cyclone separation device for plastic powder production

Abstract

This utility model relates to the technical field of plastic powder production equipment and discloses a multi-stage cyclone separator for plastic powder manufacturing. The separator includes a separation component comprising two containers for separating particulate matter and dust from unpurified plastic powder: a first separation cylinder and a second separation cylinder. Both separation cylinders are equipped with conveying mechanisms for inputting unpurified plastic powder and outputting purified particles. By using two-stage series separation in separation cylinders, a gradient and refined processing of the plastic powder mixture is achieved. The first stage primarily removes most of the coarser particles, while the second stage further refines the initially separated material, separating out finer particles and residual dust. This multi-stage separation effectively overcomes the limitations of single-stage separation, resulting in a more concentrated particle size distribution, higher purity, and better consistency of the final plastic powder product discharged from the outlet, significantly improving product quality.

Description

Technical Field

[0001] This utility model relates to the technical field of plastic powder production equipment, specifically a multi-stage cyclone separator for plastic powder manufacturing. Background Technology

[0002] In the manufacturing process of powder coatings, after the raw materials are melt-extruded, pressed, and coarsely crushed, they need to be finely ground to obtain powder with a specific particle size distribution. The product after grinding is a mixture of particles of different sizes and air, which includes fine powder (specific particle size) that meets the requirements, as well as some coarser particles that are not sufficiently ground and extremely fine dust. Therefore, efficiently and accurately separating the target particles from the overly coarse and overly fine components is a key process to ensure the quality of the final powder coating product (such as coating performance, leveling, and powder application rate).

[0003] Currently, cyclone separators are widely used in the industry for this separation process. Their basic principle is to utilize the centrifugal force generated by the rotation of the airflow, causing denser particles to be thrown against the wall of the separator and settle, while lighter dust particles are discharged from the center with the airflow, thus achieving the initial separation of coarse particles and fine dust.

[0004] However, traditional single-stage cyclone separators have obvious limitations: First, the single-stage separation efficiency is limited. For materials with a wide particle size distribution, the phenomenon of "coarse with fine particles" or "fine with coarse particles" is likely to occur. That is, some qualified fine powder is collected together with coarse particles, or some fine dust is not effectively separated and remains in the finished product, affecting the purity of the product.

[0005] Secondly, in pursuit of higher separation accuracy, the method of increasing the fan power to enhance centrifugal force is sometimes adopted. However, this not only significantly increases energy consumption, but also excessively high airflow velocity may cause secondary breakage of qualified particles or aggravate equipment wear.

[0006] Therefore, developing a multi-stage separation device that can achieve precise and efficient separation while taking into account energy consumption and operational stability has become a technical problem that the plastic powder manufacturing industry urgently needs to solve. Utility Model Content

[0007] To achieve the above objectives, the present invention provides the following technical solution: a multi-stage cyclone separator for plastic powder manufacturing, comprising a separation component, the separation component comprising two containers for separating particulate matter and dust in unpurified plastic powder, namely separation cylinder one and separation cylinder two.

[0008] Both separation cylinder one and separation cylinder two are equipped with conveying mechanisms for inputting unpurified plastic powder and outputting purified particles, as well as emission components for outputting dust.

[0009] Separator cylinder one and separator cylinder two are equipped with a material conveying assembly for particle transfer, and a gas conveying assembly for dust collection and gas emission using negative pressure adsorption technology.

[0010] Preferably, the conveying mechanism on the first separator includes a feed port and a conveying port one at its two ends, and the conveying mechanism on the second separator includes a discharge port and a conveying port two at its two ends.

[0011] Preferably, the material conveying assembly includes a collection bin located at the bottom of the first conveying interface and an output bin located at the bottom of the second conveying interface. Both the collection bin and the output bin have conveying pipes fixed at their interfaces and are connected to the corresponding first and second conveying interfaces.

[0012] Preferably, the conveying assembly includes a transfer pipe fixed between the collection bin and the output bin, and connecting the two internally.

[0013] Preferably, the conveying assembly includes a drive motor fixed to one end of the collection bin and a worm gear movably sleeved in the transmission pipe. The output end of the drive motor passes through the collection bin and is fixed to one end of the worm gear.

[0014] Preferably, the material conveying assembly includes an air pipe connector located at the bottom of the output chamber, an air supply hose fixed at one end of the air pipe connector, and an isolation net fixed at the connection between the air pipe connector and the output chamber.

[0015] Preferably, the emission assembly includes an exhaust port located at the core position of one end of the separator cylinder and the second separator cylinder, and an exhaust pipe is fixed at one end of the exhaust port.

[0016] Preferably, the gas delivery assembly includes a negative pressure chamber disposed between the exhaust pipes of the first separator and the second separator. Three connectors are provided on the side of the negative pressure chamber: two air inlet connectors and one exhaust connector. The two air inlet connectors are respectively connected to the exhaust pipes at one end of the first separator and the second separator, while the exhaust connector is connected to an external exhaust pipe for discharging the drawn-in gas.

[0017] Preferably, both ends of the negative pressure chamber are equipped with ball valves for controlling the gas flow of the corresponding air inlet connector.

[0018] Preferably, the negative pressure chamber has a built-in purification cylinder, which is connected to one end of the exhaust connector.

[0019] Compared with the prior art, this utility model provides a multi-stage cyclone separator for plastic powder manufacturing, which has the following advantages:

[0020] 1. This multi-stage cyclone separator for plastic powder manufacturing uses two-stage series separation in a first and second separation cylinder to achieve gradient and fine processing of the plastic powder mixture. The first stage of separation is mainly responsible for removing most of the coarser particles, while the second stage refines the material after the initial separation, further separating out the finer particles and residual dust. The multi-stage separation mode effectively overcomes the limitations of single-stage separation, resulting in a more concentrated particle size distribution, higher purity, and better consistency of the plastic powder product discharged from the outlet, which greatly improves product quality.

[0021] 2. This multi-stage cyclone separator for plastic powder manufacturing allows operators to independently adjust the negative pressure leading to the two separation cylinders via ball valves at both ends of the negative pressure chamber in the air conveying assembly, along with pressure gauges. This enables the setting of the most suitable negative pressure conditions (i.e., different centrifugal force intensities) for each stage of separation based on the actual material characteristics and separation requirements, thus enabling differentiated separation operations. This greatly optimizes the separation effect and broadens the equipment's adaptability to different materials.

[0022] 3. This multi-stage cyclone separator for plastic powder manufacturing uses a gas delivery hose connected to the bottom of the output chamber to deliver gas into the chamber. On the one hand, the gas blows the material to the second-stage separator, and on the other hand, this gas also participates in the second-stage separation process. By utilizing the conveying airflow, the material conveying and separation power are partially coupled, reducing additional energy consumption. At the same time, compared with the method of simply increasing the wind speed of a single-stage separator, multi-stage gentle separation reduces the risk of qualified particles breaking due to high-speed collisions. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall left-side structure of the device of this utility model;

[0024] Figure 2 This is a schematic diagram of the overall right-side structure of the device of this utility model;

[0025] Figure 3 This is a schematic diagram of the overall structure of the material conveying assembly of this utility model;

[0026] Figure 4 This is a schematic diagram of a partial structure within the material conveying assembly of this utility model;

[0027] Figure 5 This is a schematic diagram of the overall structure of the gas transmission component of this utility model.

[0028] The attached diagram lists the components represented by each number as follows:

[0029] 1. Separation assembly; 11. Separation cylinder one; 12. Separation cylinder two; 13. Conveying mechanism; 131. Feeding port; 132. Conveying port one; 133. Discharge port; 134. Conveying port two; 14. Discharge assembly; 141. Exhaust port; 142. Exhaust pipe fittings;

[0030] 2. Material conveying assembly; 21. Collection bin; 22. Output bin; 23. Conveying pipe; 24. Transfer pipe; 25. Air pipe connector; 26. Air supply hose; 27. Isolation net; 28. Drive motor; 29. ​​Worm gear;

[0031] 3. Gas delivery assembly; 31. Negative pressure chamber; 32. Air inlet connector; 33. Exhaust connector; 34. Ball valve; 35. Purification cylinder. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Example 1

[0034] Please see Figure 1 - Figure 5 As shown, the multi-stage cyclone separator for plastic powder manufacturing proposed in this embodiment consists of three main parts: a separation component 1, a material conveying component 2, and an air conveying component 3.

[0035] The separation component 1 is the main body that performs the separation function, and it includes separation cylinder one 11 and separation cylinder two 12.

[0036] The bottom of one end of the separator cylinder 11 is provided with a feed port 131, and the bottom of the other end is provided with a conveying port 132. An exhaust port 141 is provided near the shaft core of the feed port 131 and is connected to an exhaust pipe 142.

[0037] The bottom of one end of the separator cylinder 12 is provided with a discharge port 133, and the bottom of the other end is provided with a conveying port 134. An exhaust port 141 is provided near the shaft core of the conveying port 134 and is connected to an exhaust pipe 142.

[0038] The conveying assembly 2 is used to convey the material after the first separation process in the first separation cylinder 11 to the second separation cylinder 12 for a second separation process. It includes a collection bin 21 and an output bin 22.

[0039] The collection chamber 21 is connected to the conveying interface 132 at the bottom of the separation cylinder 11 via the conveying pipe 23, and is used to receive the particulate matter after the first stage of separation.

[0040] The output chamber 22 is connected to the conveying interface 134 at the bottom of the separation cylinder 2 12 via another conveying pipe 23, which is used to input the particulate matter separated in the first stage into the separation cylinder 2 12.

[0041] The collection chamber 21 and the output chamber 22 each have an installation port on their opposite sides. A transmission pipe 24 containing a worm gear 29 is connected to the installation port of the two chambers (the diameter of the transmission pipe 24 matches the diameter of the installation port and is fixed by seamless welding). The output shaft of the drive motor 28, which is fixed to one end of the collection chamber 21, extends into the collection chamber 21 and is fixed to one end of the worm gear 29. During operation, the worm gear 29 is driven to rotate, thereby pushing the material in the collection chamber 21 into the output chamber 22. The material in the output chamber 22 then enters the separation cylinder 12 through the conveying pipe 23 at the end of the second conveying interface 134 for a second stage of separation.

[0042] Furthermore, an air pipe connector 25 is provided at the bottom of the output chamber 22, and an air supply hose 26 is fixed at one end of the air pipe connector 25. At the same time, an isolation net 27 is fixed at the connection between the air pipe connector 25 and the output chamber 22. The air pipe connector 25 is connected to an air supply device, and the air supply device continuously supplies gas into the output chamber 22 through the air supply hose 26. The gas will enter the output chamber 22 and blow the plastic powder that has undergone primary treatment to the separation cylinder 12 for secondary separation.

[0043] The gas delivery assembly 3 is responsible for generating negative pressure and handling dust, and includes a negative pressure chamber 31.

[0044] The negative pressure chamber 31 is connected to the exhaust pipes 142 of the first separator 11 and the second separator 12 through the air inlet connectors 32 at both ends. Ball valves 34 are installed at both ends of the negative pressure chamber 31 to control the connection and disconnection of the connectors and the corresponding exhaust pipes 142, and to regulate the pressure in the pipes.

[0045] The negative pressure chamber 31 contains a purification cylinder 35, whose only interface is connected to one end of an exhaust connector 33, which is connected to an external vacuum system. When the external vacuum system is working, a negative pressure is created inside the negative pressure chamber 31, which draws out the dust-laden gas from the two separation cylinders. As the gas flows through the purification cylinder 35, residual fine dust is filtered out, and the clean gas is discharged through the exhaust connector 33.

[0046] The working principle of the multi-stage cyclone separator for plastic powder manufacturing proposed in this embodiment includes the following:

[0047] Before use, adjust the ball valves 34 of the corresponding pipe fittings of the two separation cylinders (separation cylinder 11 and separation cylinder 2 12) and observe the equipped pressure gauges to control the negative pressure value in the two separation cylinders and carry out differentiated separation operations.

[0048] During operation, the unpurified plastic powder mixture is blown into the separation cylinder 11 through the feed port 131 by the fan duct. Under the action of centrifugal force, larger and heavier particles are thrown against the cylinder wall in a cyclone shape and fall into the collection bin 21 at the bottom through the conveying port 132 at the other end. Meanwhile, the airflow carrying fine dust enters the exhaust pipe 142 through the corresponding exhaust port 141 in the central negative pressure zone and is drawn away, completing the first separation operation of particulate matter and dust.

[0049] The particles in the collection chamber 21 are then driven by the rotating worm gear 29 and enter the output chamber 22 through the transmission pipe 24. At this time, the plastic powder particles that have undergone the first separation process are blown into the separation cylinder 12 by the gas conveying hose 26. Similarly, the centrifugal force in the separation cylinder 11 is used for more refined separation, further separating the finer particles. Finally, the qualified particles are discharged from the discharge port 133. The dust-laden gas and tiny particles generated in the separation cylinder 12 are also drawn into the negative pressure chamber 31. The two airflows merge in the negative pressure chamber 31 and are discharged after being filtered by the purification cylinder 35. Thus, through this multi-stage separation and negative pressure collection method, efficient and high-purity separation of plastic powder is achieved.

[0050] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-stage cyclone separation device for plastic powder production, characterized by comprising: It includes a separation component (1), which includes two containers for separating particulate matter and dust in unpurified plastic powder, namely separation cylinder one (11) and separation cylinder two (12); Both the first separation cylinder (11) and the second separation cylinder (12) are provided with a conveying mechanism (13) for inputting unpurified plastic powder and outputting purified particles, and an emission component (14) for outputting dust. The first separation cylinder (11) and the second separation cylinder (12) are provided with a material conveying assembly (2) for particle transport and a gas conveying assembly (3) for dust collection and gas emission using negative pressure adsorption technology.

2. The multi-stage cyclone separation device for plastic powder production according to claim 1, characterized in that: The conveying mechanism (13) provided on the separation cylinder (11) includes a feeding port (131) and a conveying port (132) respectively provided at both ends; The conveying mechanism (13) provided on the second separator (12) includes a discharge port (133) and a second conveying port (134) respectively provided at both ends.

3. The multi-stage cyclone separation device for plastic powder production according to claim 2, characterized in that: The material conveying assembly (2) includes a collection bin (21) disposed at the bottom of the first conveying interface (132) and an output bin (22) disposed at the bottom of the second conveying interface (134); Both the collection chamber (21) and the output chamber (22) are fixed with conveying pipes (23), which are connected to the corresponding conveying interface one (132) and conveying interface two (134).

4. The multi-stage cyclone separation device for plastic powder production according to claim 3, characterized in that: The material conveying assembly (2) includes a transmission pipe (24) fixed between the collection bin (21) and the output bin (22) and connecting the inside of both.

5. The multi-stage cyclone separation device for plastic powder production according to claim 4, characterized in that: The material conveying assembly (2) includes a drive motor (28) fixed at one end of the collection bin (21) and a worm gear (29) movably sleeved in the transmission pipe (24); The output end of the drive motor (28) passes through the collection chamber (21) and is fixed to one end of the worm (29).

6. The multi-stage cyclone separation device for plastic powder production according to claim 5, characterized in that: The material conveying assembly (2) includes an air pipe connector (25) provided at the bottom of the output chamber (22), and an air conveying hose (26) is fixed at one end of the air pipe connector (25); An isolation net (27) is fixed at the connection between the tracheal connector (25) and the output chamber (22).

7. The multi-stage cyclone separator for plastic powder manufacturing according to claim 1, characterized in that: The emission assembly (14) includes an exhaust port (141) located at the core position of one end of the separation cylinder one (11) and the separation cylinder two (12), and an exhaust pipe (142) is fixed at one end of the exhaust port (141).

8. The multi-stage cyclone separation device for plastic powder production according to claim 7, characterized in that: The gas delivery assembly (3) includes a negative pressure chamber (31) disposed between the exhaust pipe (142) of the first separator (11) and the second separator (12). Three connectors are provided on the side of the negative pressure chamber (31), namely two air inlet connectors (32) and one exhaust connector (33). The two air inlet connectors (32) are respectively connected to the exhaust pipes (142) at one end of the first separator (11) and the second separator (12), while the exhaust connector (33) is connected to the external exhaust pipe for discharging the drawn-in gas.

9. The multi-stage cyclone separation device for plastic powder production according to claim 8, characterized in that: Both ends of the negative pressure chamber (31) are equipped with ball valves (34) for controlling the gas flow of the corresponding air inlet connector (32).

10. The multi-stage cyclone separation device for plastic powder production according to claim 9, characterized in that: The negative pressure chamber (31) contains a purification cylinder (35), which is connected to one end of the exhaust connector (33).

Images