A slice color difference free non-stop mixing system

Abstract

The utility model relates to a technical field of chemical fibre, disclose a kind of slice color difference free off-line mixing system, including feeding bin, vibrating screen, upper bin, mixer, lower bin and controller arranged in sequence, the bottom discharge outlet of feeding bin is connected with the feed inlet of vibrating screen, the discharge outlet of vibrating screen is connected with main feeding pipe by first material pipe, one end of main feeding pipe is connected with the air outlet of first fan, the other end of main feeding pipe is connected with the top of upper bin;The discharge outlet of mixer is connected with the top of lower bin, and the bottom of lower bin is connected with first discharge pipe and second discharge pipe, and second discharge pipe is connected with downstream end's melt spinning equipment;First discharge pipe is connected with return pipe, one end of return pipe is connected with the air outlet of second fan, the other end of return pipe is connected with feeding bin, and second on-off valve is connected on return pipe. By optimizing structure design, the continuous, uniform circulation mixing of slice is realized, the color difference risk is reduced, and the energy consumption and dust pollution are reduced.

Description

Technical Field

[0001] This utility model relates to the field of chemical fiber technology, and in particular to a non-stop mixing system for chips without color difference. Background Technology

[0002] In the chemical fiber spinning process, chips (such as polyester chips) are the main raw material, and their quality stability directly affects the performance of the final spun products, especially the color difference. Different batches or specifications of chips may have slight differences in color and performance. If they are not mixed evenly, it will lead to obvious color differences in the spun filaments and reduce the product qualification rate.

[0003] Existing chip mixing processes typically occur during the chip remelting stage, achieving functionalization through premixing chips or adding masterbatch. The specific process is: raw material preparation → metering → mixing → buffering → melt extrusion. However, this process has the following shortcomings: Insufficient mixing uniformity: Traditional mixing methods rely on simple mechanical stirring or natural mixing during the screw conveying process. For chips with large batch differences, it is difficult to achieve thorough and uniform mixing, which can easily lead to color differences in subsequent spinning.

[0004] Machine shutdown for adjustment is required: When it is necessary to change the batch of slices or add new materials, in order to avoid uneven mixing, it is often necessary to stop the machine for cleaning and remixing, which affects the continuity of production and reduces production efficiency.

[0005] High energy consumption: Some mixing systems use extended mixing time or increased stirring intensity to improve uniformity, which leads to increased energy consumption; at the same time, the shutdown and restart process also consumes additional energy.

[0006] Dust pollution: Dust is easily generated by the friction between the slices during the mixing process. Traditional systems lack effective dust collection and treatment devices, which not only pollute the environment but may also affect the normal operation of equipment and the health of operators.

[0007] Therefore, there is an urgent need for a chip mixing system that can achieve non-stop mixing, improve mixing uniformity, reduce color difference risk, and is energy-saving and environmentally friendly. Utility Model Content

[0008] The purpose of this invention is to provide a non-stop mixing system for slicing without color difference. By optimizing the structural design, it can achieve continuous and uniform cyclic mixing of slices, reduce the risk of color difference, and at the same time reduce energy consumption and dust pollution.

[0009] The above-mentioned technical objective of this utility model is achieved through the following technical solution: A non-stop mixing system for slicing without color difference includes a feeding hopper, a vibrating screen, a feeding hopper, a mixer, a discharging hopper, and a controller arranged in sequence. The bottom outlet of the feeding hopper is connected to the inlet of the vibrating screen. The outlet of the vibrating screen is connected to the main feeding pipe through a first feed pipe. One end of the main feeding pipe is connected to the outlet of a first fan, and the other end of the main feeding pipe is connected to the top of the feeding hopper. The outlet of the mixer is connected to the top of the discharging hopper. The bottom of the discharging hopper is connected to a first discharge pipe and a second discharge pipe. The second discharge pipe is connected to a downstream melt spinning device. The first discharge pipe is connected to a return pipe. One end of the return pipe is connected to the outlet of the second fan, and the other end of the return pipe is connected to the feeding hopper. A second on / off valve is connected to the return pipe. The controller controls the second on / off valve, the vibrating screen, the first fan, and the second fan.

[0010] Different batches or specifications of chips are fed into the feeding hopper. The chips in the feeding hopper enter a vibrating screen for screening. Chips of suitable particle size are screened and enter the main feeding pipe through the first feed pipe. The first blower blows air into the main feeding pipe, and the chips are conveyed along the main feeding pipe to the upper feeding hopper under the action of the first blower. Then, the chips stored in the upper feeding hopper flow out from the bottom outlet into the mixer. After being mixed in the mixer, they enter the lower feeding hopper for storage. The chips in the lower feeding hopper enter the melt spinning equipment for spinning through the second discharge pipe. When recirculation mixing is required, the second on-off valve is opened, and the material in the lower feeding hopper enters the return pipe through the first discharge pipe. Then, the second blower blows air into the return pipe, and the chips in the return pipe enter the feeding hopper along the return pipe under the action of the second blower. Then, the chips are mixed a second time according to the above path. Through multiple mixing, the chips entering the lower feeding hopper can be fully mixed. Uniformly mixed chips can reduce the color difference of the subsequent yarn.

[0011] The present invention is further configured such that: the bottom outlet of the feeding hopper is connected to the inlet of the mixer through a second material pipe, and a first on / off valve is provided on the second material pipe, and the first on / off valve is electrically connected to the controller.

[0012] With the above technical solution, when mixing is not required, the first on-off valve is closed to prevent the slices in the feeding hopper from entering the mixer. When mixing is required, the first on-off valve is opened.

[0013] The present invention is further configured such that: the end of the first discharge pipe is connected to the main feeding pipe, and the first discharge pipe is located on the upstream side of the first material pipe; A third on / off valve is connected to the first discharge pipe, and the third on / off valve is located between the return pipe and the main feed pipe. The third on / off valve is electrically connected to the controller.

[0014] With the above technical solution, when new slices are added to the feeding hopper, the slices coming out of the second discharge pipe return to the feeding hopper through the return pipe and are mixed with the new slices.

[0015] When no new material is added to the feeding hopper, the second shut-off valve is closed and the third shut-off valve is opened. The slices coming out of the second discharge pipe can directly enter the main feeding pipe, which can shorten the return path, avoid the operation of the vibrating screen, reduce energy consumption, and improve the efficiency of circulating mixing.

[0016] The present invention is further configured such that the angle α formed by the feeding direction of the first discharge pipe and the feeding direction of the main feeding pipe is an acute angle. The angle β formed by the feeding direction of the first feed pipe and the feeding direction of the main feed pipe is an acute angle. The angles α and β are between 30° and 60°.

[0017] The angle formed by the main feed pipe, the first feed pipe, and the first discharge pipe is an acute angle, which can prevent the slices from moving in the opposite direction and ensure the normal flow of the slices.

[0018] The present invention is further configured such that: the mixer includes a housing and a perforated mesh plate fixed inside the housing, and the downstream end of the perforated mesh plate is fixed on a support isolation block; The supporting isolation block, the inner wall of the shell, and the lower surface of the perforated mesh plate form an air inlet cavity, which is connected to the air outlet of the centrifugal fan. A dust collection hood is connected to the upper part of the downstream end of the housing. The dust collection hood is connected to a filter through a pipe. The filter can be a bag filter. The other end of the filter is connected to the air inlet of the centrifugal fan. A discharge hopper is connected to the lower downstream end of the housing, and the discharge hopper is connected to the feeding bin.

[0019] The slices in the feeding hopper enter the perforated mesh plate. A centrifugal fan blows air into the air inlet chamber, and the high-pressure air in the air inlet chamber flows out through the holes in the perforated mesh plate, blowing the slices on the mesh plate and thus thoroughly mixing them. At the same time, the slices move along the perforated mesh plate and enter the discharge hopper, from where they enter the unloading hopper. Meanwhile, the filter and dust collection hood are connected to the air inlet of the centrifugal fan through pipes. The dust collection hood is under negative pressure, and the dust generated during the slice mixing enters the filter for filtration through the dust collection hood.

[0020] The present invention is further configured such that the perforated mesh plate is inclined, with the feed end higher than the discharge end, to facilitate the transport of slices.

[0021] The present invention is further configured such that: multiple linearly distributed air guide plates are provided below the porous mesh plate, and the air guide plates are inclined; The distance between the multiple air guide plates and the bottom surface of the air inlet cavity decreases sequentially from the upstream end to the downstream end.

[0022] The air guide plate can guide the airflow blowing towards the perforated mesh plate, causing the slices to move upward and downstream as a whole, thus ensuring that the slices are mixed while being transported downstream.

[0023] The present invention is further configured such that: the first blower and the second blower are Roots blowers, which have greater air force and can improve the feeding effect of the slices.

[0024] The outstanding effect of this utility model is: Compared with existing technologies, this system is designed with a return pipe and multi-way shut-off valve control. When new materials need to be added or batches need to be changed, they can be mixed with new materials through return material circulation without stopping the machine to clean up the materials, thus ensuring production continuity and improving production efficiency.

[0025] The airflow from the porous mesh plate inside the mixer, combined with the guiding effect of the air guide plate, ensures that the chips are fully mixed in a suspended state. At the same time, multiple cycles of mixing can be achieved through the return pipe to further ensure the uniformity of mixing and reduce color difference problems in subsequent spinning from the source.

[0026] By connecting the first discharge pipe to the main feed pipe, the returned material can directly enter the main feed pipe when no new material is added, shortening the path and avoiding repeated work of the vibrating screen, thus reducing energy consumption; the selection of the Roots blower also ensures efficient feeding and reduces the energy consumption per unit of material.

[0027] The dust collection hood inside the mixer, together with the filter and centrifugal fan, forms a negative pressure dust removal system, which can collect the dust generated during the mixing process in a timely manner, purify the working environment, and protect the equipment and operators. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 A magnified view of a portion of A.

[0029] Reference numerals: 1. Feeding bin; 2. Vibrating screen; 3. Feeding bin; 4. Mixer; 41. Shell; 42. Perforated mesh plate; 43. Supporting isolation block; 44. Air inlet chamber; 45. Centrifugal fan; 46. Dust collection hood; 47. Filter; 48. Discharge hopper; 49. Air guide plate; 5. Discharge bin; 6. First feed pipe; 7. Main feed pipe; 8. First fan; 9. Second feed pipe; 10. First shut-off valve; 11. First discharge pipe; 12. Second discharge pipe; 13. Return pipe; 14. Second fan; 15. Second shut-off valve; 16. Third shut-off valve. Detailed Implementation

[0030] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0031] The following is for reference Figures 1 to 2 The present invention will be described as follows: like Figure 1 , Figure 2 As shown, a non-stop mixing system for slicing without color difference includes a feeding hopper 1, a vibrating screen 2, a feeding bin 3, a mixer 4, a discharging hopper 5, and a controller. The feeding hopper 1 is used to feed slices of different batches or specifications. Its bottom outlet is connected to the vibrating screen 2, which screens out slices of appropriate particle size to prevent large particles from entering subsequent processes.

[0032] The discharge port of the vibrating screen 2 is connected to the main feeding pipe 7 through the first feed pipe 6. One end of the main feeding pipe 7 is connected to the first blower 8 (Roots blower), and the other end is connected to the top of the upper hopper 3. The first blower 8 provides airflow to transport the slices along the main feeding pipe 7 to the upper hopper 3 for storage. The angle β between the first feed pipe 6 and the main feeding pipe 7 is 60° to prevent the slices from flowing backward.

[0033] The bottom of the feeding hopper 3 is connected to the mixer 4 via a second feed pipe 9. The first on / off valve 10 on the second feed pipe 9 is controlled by a controller to open and close the feeding channel. An inclined perforated mesh plate 42 is provided inside the housing 41 of the mixer 4. The downstream end of the perforated mesh plate 42 is fixed to a support isolation block 43. The support isolation block 43, the inner wall of the housing 41, and the lower surface of the perforated mesh plate 42 form an air inlet chamber 44. A centrifugal fan 45 blows air into the air inlet chamber 44, and the airflow blows the slices through the holes of the perforated mesh plate 42 to mix them. The spacing of the guide plates 49 below the perforated mesh plate 42 decreases sequentially from upstream to downstream, guiding the slices towards the discharge hopper 48 and finally into the unloading hopper 5.

[0034] The dust collection hood 46 at the top of the mixer 4 is connected to the filter bag dust collector 47 through a pipe, and then connected to the air inlet of the centrifugal fan 45 to form a negative pressure and collect dust.

[0035] The bottom of the feeding hopper 5 is connected to a first discharge pipe 11 and a second discharge pipe 12. The second discharge pipe 12 is connected to the melt spinning equipment. The first discharge pipe 11 is connected to the return pipe 13 and the main feed pipe 7. One end of the return pipe 13 is connected to the second blower 14 (Roots blower), and the other end of the return pipe 13 is connected to the feeding hopper 1. The second shut-off valve 15 on the return pipe 13 and the third shut-off valve 16 on the first discharge pipe 11 are controlled by a controller: when new material is fed, the second shut-off valve 15 is opened, and the return material enters the feeding hopper 1 and mixes with the new material; when there is no new material, the third shut-off valve 16 is opened, and the return material directly enters the main feed pipe 7. The angle α between the first discharge pipe 11 and the main feed pipe 7 is 30° to ensure smooth feeding.

[0036] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model. These improvements and modifications assumed above should also be considered within the protection scope of the present utility model.

Claims

1. A non-stop mixing system for slicing without color difference, comprising a feeding bin (1), a vibrating screen (2), a loading bin (3), a mixer (4), and a discharging bin (5) arranged in sequence, characterized in that: The discharge port of the vibrating screen (2) is connected to the main feeding pipe (7) through the first material pipe (6). One end of the main feeding pipe (7) is connected to the air outlet of the first blower (8), and the other end of the main feeding pipe (7) is connected to the top of the upper hopper (3). The discharge port of the mixer (4) is connected to the top of the lower hopper (5). The bottom of the lower hopper (5) is connected to the first discharge pipe (11) and the second discharge pipe (12). The first discharge pipe (11) is connected to the return pipe (13). One end of the return pipe (13) is connected to the air outlet of the second blower (14), and the other end of the return pipe (13) is connected to the feeding hopper (1). The return pipe (13) is connected to the second shut-off valve (15).

2. The non-stop mixing system for slicing without color difference according to claim 1, characterized in that: The bottom outlet of the feeding hopper (3) is connected to the inlet of the mixer (4) through the second material pipe (9), and the second material pipe (9) is equipped with a first on / off valve (10).

3. The non-stop mixing system for slicing without color difference according to claim 1, characterized in that: The end of the first discharge pipe (11) is connected to the main feed pipe (7), and the first discharge pipe (11) is located on the upstream side of the first feed pipe (6); A third on / off valve (16) is connected to the first discharge pipe (11), and the third on / off valve (16) is located between the return pipe (13) and the main feed pipe (7).

4. The non-stop mixing system for slicing without color difference according to claim 3, characterized in that: The angle α formed by the feeding direction of the first discharge pipe (11) and the feeding direction of the main feeding pipe (7) is an acute angle; The angle β formed by the feeding direction of the first feed pipe (6) and the feeding direction of the main feed pipe (7) is an acute angle.

5. The non-stop mixing system for slicing without color difference according to claim 4, characterized in that: The included angles α and β are between 30° and 60°.

6. The non-stop mixing system for slicing without color difference according to claim 1, characterized in that: The mixer (4) includes a housing (41) and a perforated mesh plate (42) fixed inside the housing (41). The downstream end of the perforated mesh plate (42) is fixed on a support isolation block (43). The supporting isolation block (43), the inner wall of the shell (41) and the lower surface of the perforated mesh plate (42) form an air inlet cavity (44), which is connected to the air outlet of the centrifugal fan (45). A dust collection hood (46) is connected above the downstream end of the housing (41). The dust collection hood (46) is connected to the filter (47) through a pipe. The other end of the filter (47) is connected to the air inlet of the centrifugal fan (45).

7. The non-stop mixing system for slicing without color difference according to claim 6, characterized in that: The perforated mesh plate (42) is set at an angle.

8. The non-stop mixing system for slicing without color difference according to claim 7, characterized in that: Below the porous mesh plate (42) are multiple linearly distributed air guide plates (49), which are inclined. The distance between the multiple air guide plates (49) and the bottom surface of the air inlet cavity (44) decreases sequentially from the upstream end to the downstream end.

9. The non-stop mixing system for slicing without color difference according to claim 1, characterized in that: The first blower (8) and the second blower (14) are Roots blowers.

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