Storage and conveying device for color master batches

Abstract

The invention discloses a color master batch storing and conveying device. The device comprises a shell; the stock bins are distributed in the shell, the top ends and the bottom ends of the stock bins communicate with a feeding pipe and a discharging pipe correspondingly, the feeding pipe and the discharging pipe are connected with a feeding valve and a discharging valve correspondingly, and an air storage cavity is defined by the bottom wall of the shell and the outer walls of the stock bins; the pressure regulating assembly has a pressurizing state and a pressure reducing state, the pressure regulating assembly in the pressurizing state is used for filling the gas in the gas storage cavity into the material bins when one material bin discharges materials, and the pressure regulating assembly in the pressure reducing state is used for filling the gas in the material bins into the gas storage cavity when one material bin feeds materials; and the hopper is communicated with the bottom end of the discharging pipe. According to the color master batch storing and conveying device, the air storage cavity is selected to be communicated with any stock bin through the pressure adjusting assembly, air is pumped into the air storage cavity from the stock bin in the feeding process, negative pressure is formed, feeding is convenient and rapid, air is pumped into the stock bin from the air storage cavity in the discharging process, the stock bin is pressurized, discharging is convenient and rapid, the air storage cavity and the stock bin are separated from the outside, and the maintenance difficulty is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of particle storage, transportation and packaging, and particularly to a storage and conveying device for masterbatch. Background Art

[0002] Masterbatch is a kind of polymer colorant, also called pigment concentrate, which is usually made by processing pigments (or dyes), carrier resins and additives. It has good coloring effect and convenient use. With its efficient and stable characteristics, masterbatch has become the mainstream choice for coloring polymer materials, especially suitable for large-scale production.

[0003] After the masterbatch is processed, it usually needs to be stored in batches and then transported to a packaging machine for packing. As shown in Figure 1 and Figure 2 the existing masterbatch storage and conveying device in the prior art includes a vertical outer shell. A plurality of vertical bins are arranged inside the outer shell. An inlet pipe and an outlet pipe are respectively arranged at the top and bottom of the bin. An inlet valve and an outlet valve are respectively arranged on the inlet pipe and the outlet pipe. The bottom of the outlet pipe is communicated with a hopper, and a discharge pipe is arranged at the bottom of the hopper. Since there are gaps between the masterbatch particles, the change of the internal air pressure will be affected when the masterbatch is stored in and discharged from the bin. Therefore, a mesh cover is fixedly communicated at the top of the bin, and a layer of filter cotton is sleeved outside the mesh cover. After adopting this design, when a batch of masterbatch enters the bin from the inlet pipe, the air between the masterbatch particles will be discharged to the outside through the mesh holes of the mesh cover and the filter cotton. When a batch of masterbatch is discharged from the bin into the hopper and then discharged from the hopper through the discharge pipe, the flow of the masterbatch will drive the gas in the bin to be discharged from the bin. At this time, the outside air enters the bin through the filter cotton and the mesh holes of the mesh cover to ensure the stable air pressure in the bin.

[0004] Although the above storage and conveying device realizes the connection between the inside of the bin and the outside through the mesh cover and the filter cotton, and ensures that the outside air enters the bin after passing through the filter during discharging, after long-term use, the filter cotton will be blocked, and workers need to climb to high places regularly for maintenance, which is troublesome to operate and has certain risks. Even during normal discharging, due to the existence of the filter cotton, there is a large resistance for the outside air to enter the bin through the filter cotton during discharging, resulting in a large resistance for the outside air to flow through and being difficult to quickly enter the bin. When discharging, as the masterbatch and air in the bin decrease, the air pressure in the bin decreases, affecting the smooth and rapid discharge of the remaining masterbatch in the bin. In addition, the structure of the outlet valve in the above device is simple, and the discharge amount of the masterbatch is controlled by opening and closing the outlet valve, so it is difficult to achieve the discharge of a fixed amount of masterbatch, and quantitative weighing needs to be carried out in the later process, increasing the structural complexity, process tediousness and cost of the entire masterbatch production system.

[0005] Therefore, it is necessary to improve the storage and conveying device for masterbatch in the prior art. Summary of the Invention

[0006] The object of the present invention is to overcome the defects existing in the prior art, and provide a storage and conveying device for masterbatch that is convenient and fast for feeding and discharging, easy for safety maintenance, and realizes quantitative discharging to reduce the structural complexity and cost of the production system.

[0007] To achieve the above technical effects, the technical solution of the present invention is: a storage and conveying device for masterbatch, comprising: A housing, arranged vertically; A silo, distributed circumferentially in the housing along the circumference of the housing, and the top and bottom are respectively communicated with a feed pipe and a discharge pipe located above and below the housing. The feed pipe and the discharge pipe are respectively connected with a feed valve and a discharge valve, and an air storage cavity is formed by enclosing the bottom wall of the housing and the outer wall of each silo; A pressure regulating component, having a pressurizing state and a depressurizing state. The pressure regulating component in the pressurizing state is used to fill the gas in the air storage cavity into the silo when one of the silos discharges materials, and the pressure regulating component in the depressurizing state is used to fill the gas in the silo into the air storage cavity when one of the silos feeds materials; A hopper, communicated with the bottom end of the discharge pipe and provided with a discharge port at the bottom end.

[0008] Preferably, in order to realize the mutual flow of air between the air storage cavity and the inner cavity of any one silo, and to satisfy that air enters the silo from the air storage cavity or enters the air storage cavity from the silo at a certain moment to adjust the internal pressure of the silo, the pressure regulating component includes a two-way air pump and a switching unit. One end of the two-way air pump is communicated with the air storage cavity, and the other end can be communicated with any one silo through the switching unit and is separated from the remaining silos.

[0009] Preferably, in order to facilitate the selection of the connection between the air storage cavity and the inner cavity of any one silo, the switching unit includes a rotating unit and a switching valve. The switching valve has a switching channel communicated with the two-way air pump, and the rotating unit drives the switching valve to rotate, and the rotation axis extends along the vertical direction, so that the other end of the switching channel away from the two-way air pump is communicated with one of the silos.

[0010] Preferably, in order to realize the precise docking and connection between the air storage cavity and the silo, the rotating unit is a stepping motor, and the silos are annularly arranged in the housing with the axis of the output end of the stepping motor as the center line, and the step angle of the stepping motor is an integer multiple of the array angle of the silos.

[0011] Preferably, for the convenience of maintenance and to extend the service life of the device, a buffer tank is provided on one side of the housing. A piston that slides axially therein is arranged in the buffer tank. A buffer chamber communicating with the air storage chamber is formed by the enclosure of the piston and the buffer tank. The buffer tank is also provided with a breathing port that communicates with the outside and is separated from the buffer chamber. A filter element is detachably connected to the breathing port. The buffer tank is vertically arranged, and the breathing port is arranged at the bottom end of the buffer tank.

[0012] Preferably, in order to quantitatively control the output amount of the masterbatch of the device, the discharge valve is used to control the sequential output of the masterbatch in the material bin when discharging from the material bin, and the sequential output amounts are equal.

[0013] Preferably, in order to achieve the quantitative output of the masterbatch, the discharge valve includes a valve housing communicating between the discharge pipe and the hopper, a rotating shaft that hermetically penetrates the valve housing horizontally and coaxially and rotates around its own axis in the valve housing, rotating plates that are annularly and arrayedly distributed outside the rotating shaft and are hermetically attached to the circumferential inner wall and the inner walls at both ends of the valve housing, and a damping unit that is arranged outside the valve housing and is connected to the end of the rotating shaft and is used to limit the rotation of the rotating shaft in a specific direction and hinder the rotation of the rotating shaft. An annularly arrayed and separated blanking chamber, discharging chamber, and transition chamber are formed by the enclosure of the rotating shaft, the valve housing, and the rotating plates. The blanking chamber communicates with the discharge pipe, and the transition chamber communicates with the hopper.

[0014] Preferably, in order to hinder the rotation of the rotating shaft and the rotating plates, the damping unit includes a translation unit, a compression spring, a plug, and a damping disk. The damping disk is fixed coaxially on the rotating shaft, and slots extending along its own thickness direction are distributed on the circumferential outer edge thereof. The output end of the translation unit moves radially along the damping disk and is connected to the plug through the compression spring. The compression spring applies a pressure to the plug to move it towards the axis of the damping disk, so that the plug moves in and out of the slot along with the rotation of the rotating shaft.

[0015] Preferably, in order to facilitate the filling of the blanking chamber with the masterbatch and ensure the quantitative output, a negative pressure port communicating with the blanking chamber is also provided on the valve housing. The negative pressure port communicates with the material bin through the two-way air pump, and the negative pressure port is connected with a regulating valve.

[0016] Preferably, in order to facilitate the selection of the blanking cavity corresponding to any silo to be connected to the two-way air pump, the regulating valve is arranged between each discharge valve and the shell, the regulating valve includes a regulating motor, a regulating block and a regulating shell, the regulating shell is horizontally fixed to the bottom of the shell, the outer surface of the regulating block is sealed and fits with the inner surface of the regulating shell, the regulating motor and the regulating block rotate in the regulating shell and the rotation axis is perpendicular, the regulating shell is provided with an intake port corresponding to the negative pressure port one by one, the regulating block has an adjusting channel, a suction pipe connected to one end of the two-way air pump is fixed in the shell, the suction pipe is provided with a connecting port connected to the air storage cavity, the suction pipe is connected to one end of the regulating channel, the moving trajectory of the regulating block includes a closed position and a connecting position corresponding to the silo one by one, in the closed position, the other end of the suction pipe is facing and fits the inner wall of the regulating shell, in the connecting position, the other end of the suction pipe corresponds one by one to the intake port.

[0017] In summary, compared with the prior art, the storage and conveying device of the masterbatch of the present invention selects the air storage chamber to be connected to any one of the silos through the pressure regulating component. When feeding, air is pumped from the silo into the air storage chamber to form a negative pressure to facilitate rapid feeding. When discharging, air is pumped from the air storage chamber to the silo to pressurize the silo for rapid discharge. The air storage chamber and the silo are isolated from the outside world, reducing the difficulty of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of a storage and conveying device for masterbatch in the prior art; Figure 2 yes Figure 1 Schematic diagram of the cross-section structure; Figure 3 is a structural diagram of the first embodiment; Figure 4 yes Figure 3 Explosion diagram of Figure 5 yes Figure 3 Schematic diagram of the cross-section structure; Figure 6 yes Figure 5 A magnified view of part A; Figure 7 yes Figure 5 Front view of Figure 8 is a structural diagram of the second embodiment; Figure 9 yes Figure 8 Schematic diagram of the cross-section structure; Figure 10 is a schematic structural diagram of a buffer tank according to a second embodiment; Figure 11 yes Figure 10Explosion schematic diagram; Figure 12 Is the structural schematic diagram of the third embodiment; Figure 13 Is Figure 12 The sectional structural schematic diagram of Figure 14 Is Figure 13 The enlarged view of part B of Figure 15 Is the partial structural schematic diagram of the third embodiment; Figure 16 Is Figure 15 The explosion schematic diagram of Figure 17 Is the structural schematic diagram of the discharge valve of the third embodiment; Figure 18 Is Figure 17 The sectional structural schematic diagram of Figure 19 Is Figure 18 The front view of Figure 20 Is Figure 17 The explosion schematic diagram of Figure 21 Is Figure 20 The enlarged view of part C of In the figure: 1. Outer shell; 101. Shell cylinder; 1011. Buffer interface; 102. Top cover; 103. Bottom cover; 104. First bolt; 105. First nut; 11. Air storage cavity; 12. Suction pipe; 121. Connection port; 122. Bottom cover; 123. Top cover; 13. Branch pipe; 14. Mesh cover; 15. Filter cotton; 16. Base; 17. Barometer; 2. Hopper; 21. Feed pipe; 211. Side interface; 22. Discharge pipe; 23. Feed valve; 3. Discharge valve; 31. Valve housing; 311. Blanking cavity; 312. Discharge cavity; 313. Transition cavity; 314. Negative pressure port; 315. Valve cylinder; 316. End plate; 317. Mesh plate; 32. Rotating shaft; 33. Rotating plate; 34. Damping unit; 341. Translation unit; 3411. Translation motor; 3412. Screw rod; 3413. Nut sleeve; 3414. Distance sensor; 342. Compression spring; 343. Plug-in unit; 3431. Guide wheel; 3432. Bracket; 3433. Slide bar; 3434. Magnet; 3435. Slide block; 344. Damping disc; 3441. Slot; 35. Negative pressure cover; 351. Negative pressure outlet; 36. Feeding ramp; 37. Output pipe; 38. Counter; 4. Pressure regulating assembly; 41. Two-way air pump; 42. Switching unit; 421. Rotating unit; 422. Switching valve; 4221. Switching channel; 423. Switching cover; 5. Buffer tank; 51. Piston; 511. Moving ring; 512. Rubber plate; 513. Rubber ring; 52. Buffer cavity; 53. Breathing port; 54. Filter element; 541. Filter pipe; 542. Filter cloth; 55. Balance pipe; 56. Limiting inner ring; 6. Regulating valve; 61. Regulating motor; 62. Regulating block; 621. Regulating channel; 63. Regulating housing; 631. Suction port; 632. Air outlet; 7. Hopper; 71. Discharge pipe; 72. Second bolt; 73. Second nut. Specific embodiments

[0019] The following describes the specific embodiments of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.

[0020] As Figure 1 and Figure 2As shown in the figure, the masterbatch storage and conveying device in the prior art includes a vertical and hollow outer shell 1. Inside the outer shell 1, five vertically arranged bins 2 are distributed in a circumferential annular array. The top and bottom of the bin 2 are respectively fixedly communicated with a feed pipe 21 and a discharge pipe 22 that protrude from the top and bottom of the outer shell 1. The feed pipe 21 is connected with a feed valve 23, and the discharge pipe 22 is connected with a discharge valve 3. The feed pipe 21 and the discharge pipe 22 both extend in the vertical direction. The bottoms of the five discharge pipes 22 are fixedly communicated with the same hopper 7. The hopper 7 is a hollow frustum of a cone, with its top size larger than the bottom size. The bottom of the hopper 7 is fixedly communicated with a discharge pipe 71 that extends in the vertical direction.

[0021] The five bins 2 are also respectively communicated with five L-shaped branch pipes 13. The horizontal part of the branch pipe 13 is hermetically fixed through the side wall of the outer shell 1, and the vertical part extends upward and is connected with a wire mesh cover 14. A layer of filter cotton 15 is sleeved outside the wire mesh cover 14.

[0022] In the initial state of the masterbatch storage and conveying device, the discharge valves 3 and the feed valves 23 connected to the discharge pipes 22 at the bottoms of the five bins 2 are all closed. When in use, one of the feed valves 23 is opened, and masterbatch is input into the corresponding bin 2 through a negative pressure pump. While the masterbatch fills the bin 2, the air inside the bin 2 and between the masterbatch passes through the branch pipe 13 and the wire mesh cover 14 and is discharged to the outside through the filter cotton 15. Then the feed valve 23 is closed, and the feeding work of the masterbatch in this bin 2 is completed. Then, the feeding work of the remaining four bins 2 is carried out according to the above steps.

[0023] When it is necessary to discharge the masterbatch for packing, the discharge valve 3 corresponding to one of the bins 2 is opened, so that the masterbatch falls downward from the bin 2, enters the hopper 7 through the discharge pipe 22, and then falls downward in the hopper 7 and is discharged downward through the discharge pipe 71. The falling masterbatch is packed by a packing machine until all the masterbatch in this bin 2 is discharged, and then the discharge valve 3 is closed, thus completing the discharging work of the masterbatch in the bin 2. Then, the discharging work of the remaining four bins 2 is carried out in turn. When the masterbatch is discharged, the outside air is filtered through the filter cotton 15 and then enters the wire mesh cover 14 and enters the bin 2 through the branch pipe 13 to prevent a negative pressure from being formed inside the bin 2, which affects the discharging operation of the masterbatch.

[0024] In the above feeding and discharging work processes, since the air inside and outside the bin 2 needs to pass through the filter cotton 15, there is a large resistance to air flow, which affects the feeding and discharging of the masterbatch. Moreover, when discharging, since the outside air contains dust and impurities, it is necessary to use the filter cotton 15 for filtration, resulting in the surface of the filter cotton 15 being prone to accumulating dust and impurities after long-term use, which affects the air flow. Therefore, it is necessary for the staff to climb to a high place regularly to clean and maintain the filter cotton 15, etc. The operation is troublesome and there is a certain danger.

[0025] Based on the above situation, the present invention discloses a masterbatch storage and conveying device of three embodiments, which is described as follows.

[0026] The first embodiment

[0027] As Figures 3 - 7 shown, a masterbatch storage and conveying device according to the first embodiment of the present invention includes: A housing 1, which is vertically arranged; A silo 2, which is distributed circumferentially in the housing 1 along the circumference of the housing 1, and the top and bottom are respectively communicated with a feed pipe 21 and a discharge pipe 22 located above and below the housing 1. The feed pipe 21 and the discharge pipe 22 are respectively connected with a feed valve 23 and a discharge valve 3. A gas storage cavity 11 is formed by enclosing the bottom wall of the housing 1 and the outer wall of each silo 2; A pressure regulating component 4, which has a pressurizing state and a depressurizing state. The pressure regulating component 4 in the pressurizing state is used to fill the gas in the gas storage cavity 11 into the silo 2 when one of the silos 2 discharges materials, and the pressure regulating component 4 in the depressurizing state is used to fill the gas in the silo 2 into the gas storage cavity 11 when one of the silos 2 feeds materials; A hopper 7, which is communicated with the bottom end of the discharge pipe 22 and is provided with a discharge port at the bottom end.

[0028] In this embodiment, the number of silos 2 is also five. Of course, according to actual needs, it can also be other numbers. When the device feeds materials, the pressure regulating component 4 is adjusted to the depressurizing state, a specific silo 2 is selected, the feed valve 23 and the discharge valve 3 corresponding to this silo 2 are closed, the air in the silo 2 is pumped into the gas storage cavity 11, so that a negative pressure is formed in the silo 2, and then the feed valve 23 corresponding to this silo 2 is opened. The pressure regulating component 4 continuously pumps the air in the silo 2, and a large amount of masterbatch is conveyed into the silo 2 through a negative pressure pump. Since the silo 2 maintains a negative pressure state, the masterbatch can quickly fill into the silo 2.

[0029] When discharging materials is required, the pressure regulating component 4 is adjusted to the pressurizing state, a specific silo 2 is selected, the air in the gas storage cavity 11 is conveyed into the silo 2, so that a high-pressure state is formed in the silo 2. The air pressure in the silo 2 is greater than the external air pressure. The discharge valve 3 corresponding to this silo 2 is opened, and at the same time, the pressure regulating component 4 continuously conveys the air in the gas storage cavity 11 into the silo 2. Under the action of high pressure, the masterbatch accumulated in the silo 2 can quickly discharge from the silo 2, enter the hopper 7 through the discharge pipe 22, and then discharge from the discharge port of the hopper 7, and is received by a packaging machine for batch packaging of the masterbatch.

[0030] Different from the prior art, inside the housing 1 of this embodiment, its air storage cavity 11 is in a closed state isolated from the outside world, and is used to temporarily store the gas between the masterbatch during feeding and the air in the silo 2 during feeding, so that the silo 2 is in a negative pressure state during feeding, facilitating the rapid feeding of the silo 2, and during discharging, it is transported into the corresponding silo 2, and the masterbatch in the silo 2 is discharged through high pressure, realizing rapid discharging, thereby being beneficial to improving work efficiency; and because the air storage cavity 11 is isolated from the outside world, there is no need for a filter cotton 15 to filter the outside air, reducing the resistance of air flow, and further facilitating rapid feeding and discharging.

[0031] Specifically, the housing 1 of this embodiment includes a shell cylinder 101 extending in the vertical direction. Outer flanges are provided on the circumferential outer edges at both ends of the shell cylinder 101. The top outer flange is fixedly connected with a horizontal top cover 102 through a first bolt 104 and a first nut 105 connected by threads, and the bottom outer flange is fixedly connected with a horizontal bottom cover 103 through a first bolt 104 and a first nut 105 connected by threads; for the silo 2, it includes an upper cylindrical part and a conical cylindrical part coaxially fixed below the upper cylindrical part. The top of the upper cylindrical part is fixed below the top cover 102, the bottom end of the lower conical cylindrical part is fixed above the bottom cover 103, the feed pipe 21 is integrally formed and fixed above the top cover 102 and communicates with the top of the upper cylindrical part, and the discharge pipe 22 is welded and fixed below the bottom cover 103 and the bottom end is fixedly connected with a conical frustum-shaped and hollow hopper 7. The bottom end of the hopper 7 is the discharge port, and the discharge port is fixedly connected with a downward extending discharge pipe 71 through a second bolt 72 and a second nut 73 connected by threads.

[0032] A further improvement is that the pressure regulating component 4 includes a two-way air pump 41 and a switching unit 42. One end of the two-way air pump 41 is communicated with the air storage cavity 11, and the other end can be communicated with any one of the silos 2 through the switching unit 42 and is isolated from the remaining silos 2.

[0033] With the above design, when using the switching unit 42 to select that the air storage cavity 11 is communicated with one of the silos 2 through the two-way air pump 41, the air storage cavity 11 is kept isolated from the remaining silos 2. In this way, by adjusting the air extraction and exhaust direction of the two-way air pump 41, the working state conversion of the pressure regulating component 4 is realized, that is, in the pressurizing state, the two-way air pump 41 extracts the air in the air storage cavity 11 and transports it into the silo 2 to increase the pressure in the silo 2, facilitating discharging, and in the depressurizing state, the two-way air pump 41 extracts the air in the silo 2 and transports it into the air storage cavity 11 to reduce the air pressure in the silo 2, facilitating feeding.

[0034] The switching unit 42 includes a rotating unit 421 and a switching valve 422. The switching valve 422 has a switching channel 4221 communicating with the two-way air pump 41. The rotating unit 421 drives the switching valve 422 to rotate, and the axis of rotation extends in the vertical direction, so that the other end of the switching channel 4221 away from the two-way air pump 41 communicates with one of the bins 2. The rotating unit 421 is a stepper motor. The bins 2 are annularly arrayed in the housing 1 with the axis of the output end of the stepper motor as the center line, and the step angle of the stepper motor is an integer multiple of the array angle of the bins 2.

[0035] Specifically, as Figures 4 - 7 shown, a side interface 211 is provided on the side wall of the feed pipe 21. The side interface 211 is located below the feed valve 23 and faces the axis of the annular array of the bins 2. The switching unit 42 further includes a switching cover 423. The switching cover 423 is fixed above the top cover 102 and encloses a cylindrical switching cavity with the top cover 102. The switching valve 422 is cylindrical and adapted to the switching cavity and is sealingly fitted to the inner wall of the switching cavity. The extending trajectory of the switching channel 4221 is L-shaped.

[0036] Five docking ports are provided on the switching cover 423 and are distributed in an annular array. The five docking ports are in one-to-one correspondence with the side interfaces 211 corresponding to the five bins 2. The switching channel 4221 includes a connected horizontal channel and a vertical channel. The vertical channel extends downward and its axis coincides with the axis of the distribution of the bins 2 and the axis of the housing 1. The horizontal channel is at the same height as the docking port and the side interface 211. The rotating unit 421 is a stepper motor fixed on the switching cover 423, and its step angle is 72° (it should be noted that in the initial state, the end of the horizontal channel away from the vertical channel communicates with one of the docking ports). Of course, the step angle can also be other divisors other than one and seventy-two. The output end of the stepper motor extends downward and is fixedly connected to the switching valve 422 coaxially.

[0037] A top communication port communicating with the bottom end of the vertical channel is provided on the top cover 102. The two-way air pump 41 is fixed inside the shell cylinder 101. Its top end communicates with the top communication port, and its bottom end communicates with the air storage cavity 11. The two-way air pump 41 is located at the center of the distribution of the five bins 2.

[0038] With this design, the rotation angle can be precisely controlled through the rotating unit 421. While the bottom of the longitudinal channel of the rotating unit 421 is always connected to the top of the two-way air pump 41 through the top communication port, after the switching valve 422 rotates a certain angle, one end of the transverse channel of the switching valve 422 away from the longitudinal channel can be connected to the side interface 211 through the corresponding docking port. In this state, the top of the two-way air pump 41, the fixed communication port, the switching channel 4221, the docking port, the side interface 211, the feed pipe 21, and the silo 2 are sequentially connected. That is, the air storage cavity 11 can be connected to a specific silo 2 through the two-way air pump 41, while the remaining four silos 2 are separated from the air storage cavity 11, facilitating the control of the silo 2 connected to the two-way air pump 41 to increase pressure for discharging or reduce pressure for feeding.

[0039] A horizontal base 16 is fixedly sleeved on the outer periphery of the hopper 7. By fixing the position of the base 16, it is convenient to fix the positions of the hopper 7 and the housing 1.

[0040] A barometer 17 corresponding to each of the five silos 2 is also fixed on the top cover 102. The detection end of the barometer 17 extends downward to the top inside the silo 2, facilitating the detection of the pressure inside the silo 2; a barometer 17 is also fixed on the bottom cover 103, and its detection end extends upward into the air storage cavity 11, facilitating the detection of the pressure inside the air storage cavity 11.

[0041] Second Embodiment

[0042] As Figures 8 - 11 shown, a color masterbatch storage and conveying device according to the second embodiment of the present invention, based on the first embodiment, is different in that a buffer tank 5 is provided on one side of the housing 1. A piston 51 that slides axially along the buffer tank 5 and is hermetically connected to its circumferential inner wall is provided inside the buffer tank 5. The piston 51 and the buffer tank 5 enclose a buffer chamber 52 that communicates with the air storage cavity 11. The buffer tank 5 is also provided with a breathing port 53 that communicates with the outside and is separated from the buffer chamber 52.

[0043] With this design, during the process of evacuating the silo 2, part of the gas in the silo 2 can enter the buffer chamber 52. That is, the buffer chamber 52 is formed by the combination of the buffer tank 5 and the piston 51, increasing the gas capacity and reducing the pressure borne by the housing 1, which is beneficial to extending the service life of the housing 1. Moreover, by communicating with the outside through the breathing port 53 and being separated from the buffer chamber 52, it is convenient for the piston 51 to move axially along the buffer tank 5 to automatically adjust the position of the piston 51 according to the gas volume in the buffer chamber 52, reducing the pressure borne by the buffer tank 5 and the housing 1 and extending the service life of the device.

[0044] A further improvement is that a filter element 54 is detachably connected to the breathing port 53. The buffer tank 5 is vertically arranged, and the breathing port 53 is arranged at the bottom end of the buffer tank 5.

[0045] Specifically, the buffer tank 5 is fixed above the base 16 through feet. The breathing port 53 is arranged at the bottom of the buffer tank 5 and is detachably connected with a filter element 54. The filter element 54 can filter ash and impurities in the external air, preventing them from entering the buffer tank 5 and affecting the sealing performance between the piston 51 and the inner wall of the buffer tank 5. Moreover, the breathing port 53 is arranged at the bottom, which is convenient for replacing the filter element 54 at a lower position, thus facilitating maintenance and avoiding the danger caused by climbing at a high place. And the breathing port 53 is arranged at the bottom position, which can reduce the chance of dust accumulation on the surface area of the filter element 54 and extend the service and replacement cycle of the filter element 54.

[0046] A balance pipe 55 communicating with the buffer chamber 52 is fixed on the upper side wall of the buffer tank 5. A buffer interface 1011 communicating with the gas storage chamber 11 is arranged on the side wall of the shell cylinder 101. The buffer interface 1011 is communicated with the balance pipe 55. In this way, the communication between the gas storage chamber 11 and the buffer chamber 52 is realized.

[0047] Two limiting inner rings 56 axially distributed below the balance pipe 55 are integrally formed on the circumferential inner wall of the buffer tank 5. The piston 51 moves vertically between the two limiting inner rings 56. Through the two limiting inner rings 56, the moving range of the piston 51 is restricted, preventing it from moving to the top or bottom inside the buffer tank 5.

[0048] The piston 51 includes a moving ring 511 coaxial with the buffer tank 5. A rubber ring 513 is fixedly connected to the outer edge of the circumferential periphery of the moving ring 511. Through the elastic deformation of the rubber ring 513, the sealing performance between the piston 51 and the circumferential inner wall of the buffer tank 5 is ensured; a rubber plate 512 is fixed inside the moving ring 511. With this design, when the internal pressure in the buffer chamber 52 changes, in addition to the axial movement of the moving ring 511, the rubber plate 512 can undergo corresponding deformation. For example, after the internal pressure in the buffer chamber 52 increases, the rubber plate 512 can bulge downward to adapt to the pressure change. At the same time, through the downward deformation of the rubber plate 512, the gas capacity of the buffer chamber 52 is increased.

[0049] The filter element 54 includes a filter pipe 541. The filter pipe 541 is threadedly connected to the breathing port 53. The bottom of the filter pipe 541 is a round plate with densely distributed through holes, and a filter cloth 542 is covered on the round plate. In this way, it is convenient for the quick detachable connection between the filter element 54 and the breathing port 53, and at the same time, it is convenient for disassembling, cleaning and maintaining the filter element 54.

[0050] Third Embodiment

[0051] As Figures 12 - 21 shown, a storage and conveying device for masterbatch according to the third embodiment of the present invention, based on the second embodiment, is different in that the discharge valve 3 is used to control the sequential output of the masterbatch in the bin 2 and the sequential output amounts are equal when discharging the bin 2.

[0052] The discharge valve 3 controls the output of an equal amount of masterbatch when the silo 2 is discharged, thereby facilitating the silo 2 to pass a fixed amount of masterbatch into the hopper 7 each time, so as to accurately control the discharge amount of the masterbatch, thereby eliminating the need for quantitative weighing in the later stage, simplifying the structural complexity and process complexity of the entire masterbatch production system, thereby helping to reduce costs, and improving production and packaging efficiency by controlling the quantitative discharge during discharge.

[0053] A further improvement is that the discharge valve 3 includes a valve housing 31 connected between the discharge pipe 22 and the hopper 7, a rotating shaft 32 that is sealed and passes through the valve housing 31 along the horizontal coaxial centerline and rotates around its own axis in the valve housing 31, a rotating plate 33 distributed in an annular array outside the rotating shaft 32 and sealed to the circumferential inner wall and the inner wall at both ends of the valve housing 31, a damping unit 34 arranged outside the valve housing 31 and connected to the end of the rotating shaft 32, for limiting the rotation of the rotating shaft 32 in a specific direction and hindering the rotation of the rotating shaft 32, the rotating shaft 32, the valve housing 31 and the rotating plate 33 enclose a blanking cavity 311, a discharge cavity 312 and a transition cavity 313 that are distributed in an annular array and separated from each other, the blanking cavity 311 is connected to the discharge pipe 22, and the transition cavity 313 is connected to the hopper 7.

[0054] Specifically, the inner cavity of the valve housing 31 is a disc-shaped axially horizontal disk, the curved surface of its circumferential inner wall is a cylindrical surface, and the planes of the inner walls at both ends are two parallel vertical planes. Three rotating plates 33 are distributed in a circular array outside the rotating shaft 32. The three rotating plates 33 are sealed and connected to the inner wall of the valve housing 31. In this way, the three rotating plates 33, the rotating shaft 32 and the valve housing 31 enclose a blanking cavity 311, a discharge cavity 312 and a transition cavity 313 of the same volume and are distributed in sequence along the circumference of the rotating shaft 32.

[0055] The damping unit 34 can limit the rotation direction of the shaft 32. Figure 19 For example, the damping unit 34 can limit the rotation of the rotating shaft 32 in the clockwise direction, preventing the rotating shaft 32 and the rotating plate 33 from rotating in the counterclockwise direction, and the damping unit 34 hinders the clockwise rotation of the rotating shaft 32, providing resistance, and cooperates with the high-pressure gas to push the masterbatch downward to provide the power for the rotation of the rotating plate 33. When the resistance of the damping unit 34 is less than the power provided by the high-pressure gas, the rotating plate 33 rotates clockwise, causing the masterbatch originally in the blanking cavity 311 to rotate to the position of the discharge cavity 312, and fall downward into the hopper 7 through the discharge cavity 312. At the same time, the two rotating plates 33 originally corresponding to the transition cavity 313 rotate to two positions corresponding to the blanking cavity 311. Under the pressure of the high-pressure gas, the masterbatch enters and fills the blanking cavity 311, so that when it rotates next time, a certain amount of masterbatch in the blanking cavity 311 enters the hopper 7 through the discharge cavity 312. In this way, a certain amount of masterbatch can be output each time the rotating shaft 32 rotates a certain angle.

[0056] A further improvement is that a negative pressure port 314 communicating with the blanking cavity 311 is further provided on the valve housing 31. The negative pressure port 314 is connected to the material bin 2 through a two-way air pump 41, and a regulating valve 6 is connected to the negative pressure port 314.

[0057] With this design, during discharging, the regulating valve 6 is opened, so that the blanking cavity 311 communicates with the bottom end of the two-way air pump 41 through the negative pressure port 314, and the top end of the two-way air pump 41 communicates. The two-way air pump 41 is started to extract the air in the air storage cavity 11 and the blanking cavity 311 and convey it into the hopper 7, so that the pressure in the blanking cavity 311 decreases, that is, the internal air pressure below the masterbatch decreases. Combined with the increase in the air pressure above the masterbatch, the masterbatch can quickly fill the blanking cavity 311. Combined with the increase in the air pressure in the material bin 2, the high-pressure gas generates a pressure on the masterbatch, so that the driving force for the rotating plate 33 to rotate is greater than the resistance of the damping unit 34, thereby causing the rotating plate 33 to rotate. The masterbatch filling the blanking cavity 311 enters the discharge cavity 312 as the rotating plate 33 rotates, drops downward in the discharge cavity 312 into the hopper 7, and then is discharged from the discharge pipe 71.

[0058] A further improvement is that the regulating valve 6 is arranged between each discharge valve 3 and the outer shell 1. The regulating valve 6 includes a regulating motor 61, a regulating block 62 and a regulating shell 63. The regulating shell 63 is horizontally fixed at the bottom of the outer shell 1. The outer surface of the regulating block 62 is hermetically fitted with the inner surface of the regulating shell 63. The regulating motor 61 and the regulating block 62 rotate in the regulating shell 63 and the rotation axis is perpendicular. The regulating shell 63 is provided with an air suction port 631 corresponding to the negative pressure port 314 one by one. The regulating block 62 has a regulating channel 621. A suction pipe 12 communicating with one end of the two-way air pump 41 is fixed in the outer shell 1. The suction pipe 12 is provided with a connection port 121 communicating with the air storage cavity 11. The suction pipe 12 communicates with one end of the regulating channel 621. The movement track of the regulating block 62 includes a closed position and a communicating position corresponding to the material bin 2 one by one. In the closed position, the other end of the suction pipe 12 is just opposite to and fits the inner wall of the regulating shell 63. In the communicating position, the other end of the suction pipe 12 corresponds to the air suction port 631 one by one.

[0059] Specifically, such as Figure 14 and Figure 16As shown in the figure, the regulating valve 6 is located directly below the two-way air pump 41. The regulating shell 63 in the regulating valve 6 is fixed below the bottom cover 103. The regulating shell 63 is a hollow disc-shaped structure, coaxial with the shell cylinder 101. Five air suction ports 631 corresponding to the five discharge valves 3 are provided on the side wall of the regulating shell 63, and an air outlet 632 is provided at the center of the top. The regulating block 62 is located inside the regulating shell 63, and the outer surface of the regulating block 62 is hermetically fitted with the inner surface of the regulating shell 63. The regulating motor 61 is fixed above the hopper 7, and its output shaft extends upward and hermetically penetrates the bottom wall of the regulating shell 63 and is fixedly connected to the regulating block 62 coaxially. The regulating motor 61 is a stepping motor with a step angle of 36° (it should be noted that the step angle of the regulating motor 61 can be divided evenly by the array angle of the silo 2 and the quotient is greater than one, that is, the array angle of the silo 2 is at least twice the step angle of the regulating motor 61 and the multiple is an integer). An adjusting channel 621 extending along an L-shaped trajectory is provided on the regulating block 62. The adjusting channel 621 includes a horizontal channel and a vertical channel. The vertical channel is coaxially connected to the air outlet 632, and one end of the horizontal channel away from the vertical channel is in contact with the cylindrical surface where the circumferential inner wall of the regulating shell 63 is located.

[0060] An installation through hole is provided at the center of the bottom cover 103. A suction pipe 12 extending in the vertical direction is also provided inside the shell cylinder 101. The suction pipe 12 is coaxial with the shell cylinder 101. A bottom cover 122 is provided at the bottom end of the suction pipe 12. The bottom cover 122 covers the installation through hole, and a barometer 17 is provided on the bottom cover 103. The detection end of the barometer 17 is located inside the bottom cover 122. A top cover 123 is provided at the top end of the suction pipe 12. A flange is provided at the bottom end of the two-way air pump 41, and the flange is fixedly covered on the top cover 123. The connection port 121 is provided on the side wall of the top cover 123.

[0061] After adopting the above structural design, the adjusting motor 61 can drive the adjusting block 62 to rotate around its own axis line. In the initial state, the end of the horizontal channel of the adjusting block 62 away from the vertical channel is communicated with one of the air suction ports 631. Therefore, in the initial state, the adjusting block 62 is in the communication working position. When the two-way air pump 41 injects air into the silo 2, the air at its intake end comes from two parts. One part is the air in the air storage cavity 11. After entering the top cover 123 through the connection port 121, it is pumped away by the two-way air pump 41. The other part is that in one of the discharge valves 3, the air in the blanking cavity 311 can pass through the negative pressure port 314, the air suction port 631, the adjusting channel 621, the air outlet 632, the bottom cover 122, the suction pipe 12 and the top cover 123, and then be pumped away by the two-way air pump 41. If the adjusting motor 61 drives the adjusting block 62 to rotate once, the adjusting block 62 is in the closed working position, and the inner wall of the horizontal channel facing the adjusting block 62 is blocked from the air suction port 631. At this time, the two-way air pump 41 only sucks air from the air storage cavity 11. If the adjusting motor 61 drives the adjusting block 62 to rotate again, the adjusting block 62 is in another communication working position (it should be noted that the number of communication working positions of the adjusting block 62 is equal to and corresponds one by one to the number of silos 2). The horizontal channel is communicated with another air suction port 631. At this time, the two-way air pump 41 sucks air from the negative pressure port 314 of the discharge valve 3 corresponding to another silo 2 to perform the discharging process on another silo 2. Therefore, through the above structure, the communication state between the negative pressure port 314 in the discharge valve 3 corresponding to each silo 2 and the two-way air pump 41 is controlled.

[0062] Since a barometer 17 for detecting the pressure in the inner cavity of the bottom cover 122 is provided on the bottom cover 103, correspondingly, another barometer 17 is also provided on the top of the buffer tank 5. The detection end of the barometer 17 extends downward into the buffer cavity 52 to detect the air pressure in the buffer cavity 52.

[0063] A further improvement is that the damping unit 34 includes a translation unit 341, a compression spring 342, a plug-in unit 343 and a damping disc 344. The damping disc 344 is coaxially fixed on the rotating shaft 32 and has slots 3441 extending along its own thickness direction distributed on its outer circumference. The output end of the translation unit 341 moves radially along the damping disc 344 and is connected to the plug-in unit 343 through the compression spring 342. The compression spring 342 applies a pressure to the plug-in unit 343 to move it towards the axis line of the damping disc 344, so that the plug-in unit 343 moves in and out of the slots 3441 along with the rotation of the rotating shaft 32.

[0064] After adopting the above design, the compression spring 342 applies a pressure to the plug 343 to move it towards the axis of the damping disc 344, causing the plug 343 to have a tendency to move towards the center of the damping disc 344. As the damping disc 344 rotates, when the damping disc 344 rotates to a position where one of the slots 3441 is facing the plug 343, under the action of the compression spring 342, the plug 343 is inserted into the slot 3441, thereby hindering the rotation of the damping disc 344 and restricting the rotation direction of the damping disc 344, achieving the limitation and obstruction of the rotation directions of the rotating shaft 32 and the rotating plate 33, such that a certain amount of high-pressure gas is required to push the color masterbatch to move downward in the silo 2 to overcome the resistance of the damping unit 34 and realize the rotation of the rotating plate 33 and the rotating shaft 32; and the position of the compression spring 342 can be adjusted through the translation unit 341 to adjust the elastic force of the compression spring 342 on the plug 343, avoiding the situation where the obstruction of the damping unit 34 is too small to affect the quantitative output of the device and the obstruction of the damping unit 34 is too large to affect the discharging efficiency.

[0065] The specific structure of the discharge valve 3 is as Figure 14 , Figures 17 - 21 shown. The valve housing 31 of the discharge valve 3 includes a horizontal valve barrel 315 and end plates 316 fixedly covered at both ends of the valve barrel 315. The curved surface where the circumferential inner wall of the valve barrel 315 is located is a cylindrical surface with a horizontal axis. The valve barrel 315 is integrally connected to the bottom end of the discharge pipe 22. A negative pressure port 314 is provided above the side of the valve barrel 315. An arc-shaped net plate 317 is fixed inside the negative pressure port 314. The net plate 317 is sealed with mesh holes, and the aperture of the mesh holes is smaller than the particle size of the color masterbatch to prevent the color masterbatch from being sucked out from the negative pressure port 314 into the blanking cavity 311 during air extraction. The discharge cavity 312 is located directly below the blanking cavity 311, and the transition cavity 313 is located between the discharge cavity 312 and the blanking cavity 311. A negative pressure cover 35 is provided on the same side as the negative pressure port 314. The negative pressure cover 35 covers the negative pressure port 314 and forms a negative pressure cavity with the outer wall of the valve housing 31. A negative pressure outlet 351 communicating with the negative pressure cavity is provided on the inner wall of the negative pressure cover 35 facing away from the valve housing 31. The negative pressure outlet 351 is communicated with the air suction port 631 of the adjustment housing 63. In this way, when the two-way air pump 41 extracts air from the discharge valve 3, the air in the blanking cavity 311 can sequentially enter the adjustment channel 621 of the adjustment block 62 through the mesh holes of the net plate 317, the negative pressure cavity, the negative pressure outlet 351, and the air suction port 631.

[0066] The bottom end of the valve barrel 315 is integrally connected with an output pipe 37 communicating with the discharge cavity 312. The bottom end of the output pipe 37 is communicated with the hopper 7, facilitating the color masterbatch to fall downward along the output pipe 37 after changing its position through the rotating plate 33 and entering the discharge cavity 312; a guiding slope 36 is fixed on the inner wall of the output pipe 37 for guiding the color masterbatch into the hopper 7.

[0067] The rotating shaft 32 is coaxially sealed and passes through the two end plates 316. The damping discs 344 of the damping unit 34 are coaxially fixed to both ends of the rotating shaft 32. Slots 3441 are evenly spaced on the circumferential outer edge of the damping disc 344, so that the damping disc 344 has a structure similar to a sawtooth disc as a whole.

[0068] The translation unit 341 is arranged on the side of the valve cylinder 315 facing away from the negative pressure port 314. The translation unit 341 includes a translation motor 3411, a screw 3412 and a sleeve 3413. The translation motor 3411 is fixed on the side wall of the valve cylinder 315 and the output end is fixedly connected to the screw 3412 coaxially. The axis of the screw 3412 is horizontal and parallel to the axis of the rotating shaft 32. There are two damping units 34, which are respectively located at both ends of the rotating shaft 32 and connected to both sides of the sleeve 3413. The sleeve 3413 is provided with a distance sensor 3414 facing the outer wall of the valve cylinder 315.

[0069] After adopting the above structure, the translation motor 3411 is started, driving the screw 3412 to rotate around its own circumference, and acting on the sleeve 3413 through the thread, so that the sleeve 3413 moves along the screw 3412, and the position of the sleeve 3413 is adjusted. The axial position of the sleeve 3413 is conveniently detected through the distance sensor 3414 to adjust the position of the compression spring 342.

[0070] The plug-in 343 includes a bracket 3432, and a guide wheel 3431 is provided on the side of the bracket 3432 adjacent to the damping disk 344. The axis of the guide wheel 3431 is parallel to the axis of the damping disk 344. The outer diameter of the guide wheel 3431 is smaller than the slot size of the slot 3441, which facilitates the guide wheel 3431 to enter the slot 3441 under the action of the compression spring 342. The rotation of the guide wheel 3431 can reduce the friction between the inner wall of the slot 3441 and the guide wheel 3431.

[0071] A slide bar 3433 extending horizontally and perpendicular to the axis of the guide wheel 3431 is provided on the side of the bracket 3432 facing away from the slot 3441. Two slide bars 3433 are arranged side by side along the axis of the guide wheel 3431. A protruding plate is fixed to the end of each slide bar 3433. A slider 3435 is slidingly sleeved on the outer surface of each slide bar 3433. The slider 3435 is fixedly connected to the threaded sleeve 3413. Compression springs 342 are also sleeved on the outer surface of each slide bar 3433. The ends of the compression springs 342 are respectively connected to the bracket 3432 and the sliders 3435. This facilitates adjustment of the position of the sliders 3435 via the translation unit 341, thereby adjusting the position of the end of the compression spring 342 away from the damping disc 344 and adjusting the resistance to the damping disc 344's rotation.

[0072] Two magnets 3434 facing each other are respectively fixed on the slider 3435 and the bracket 3432. The two magnets 3434 repel each other to increase the resistance against the rotation of the damping disc 344, reduce the burden on the compression spring 342, and prevent the compression spring 342 from being damaged due to excessive force. A counter 38 is further provided on the valve barrel 315 and faces the edge of one of the damping discs 344. The counter 38 is used to detect the slot 3441 passing through its own height position. Since the slots 3441 are equally spaced on the outer circumference of the damping disc 344, by detecting the number of slots 3441 passing through, the rotation angle of the damping disc 344, the rotating shaft 32, and the rotating plate 33 can be determined, and the resistance of the damping unit 34 can be adjusted in cooperation with the translation unit 341 to open and close the discharge valve 3, so as to control the connection and disconnection between the discharge pipe 22 and the hopper 7.

[0073] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art in the technical field, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A storage and conveying device for masterbatch, characterized in that, Comprising: A housing, arranged vertically; A silo, circumferentially distributed within the housing along the circumference of the housing, and having a feed pipe and a discharge pipe respectively connected to the top and bottom ends thereof and located above and below the housing. The feed pipe and the discharge pipe are respectively connected with a feed valve and a discharge valve. The bottom wall of the housing and the outer walls of the silos enclose a gas storage cavity; A pressure regulating assembly, having a pressurizing state and a depressurizing state. The pressure regulating assembly in the pressurizing state is used to fill the gas in the gas storage cavity into the silo when one of the silos discharges materials, and the pressure regulating assembly in the depressurizing state is used to fill the gas in the silo into the gas storage cavity when one of the silos feeds materials; A hopper, connected to the bottom end of the discharge pipe and having a discharge port at the bottom end.

2. The storage and conveying device for masterbatch according to claim 1, characterized in that: The pressure regulating assembly includes a two-way air pump and a switching unit. One end of the two-way air pump is connected to the gas storage cavity, and the other end can be connected to any one of the silos through the switching unit and is separated from the remaining silos.

3. The storage and conveying device for masterbatch according to claim 2, characterized in that: The switching unit includes a rotating unit and a switching valve. The switching valve has a switching channel connected to the two-way air pump. The rotating unit drives the switching valve to rotate, and the axis of rotation extends along the vertical direction, so that the other end of the switching channel away from the two-way air pump is connected to one of the silos.

4. The storage and conveying device for masterbatch according to claim 3, wherein: The rotating unit is a stepping motor. The silos are circumferentially arranged in an array within the housing with the axis of the output end of the stepping motor as the center line. The step angle of the stepping motor is an integer multiple of the array angle of the silos.

5. The storage and conveying device for masterbatch according to claim 2, wherein: A buffer tank is arranged on one side of the housing. A piston that slides axially is arranged in the buffer tank. The piston and the buffer tank enclose a buffer cavity connected to the gas storage cavity. The buffer tank is also provided with a breathing port communicating with the outside and separated from the buffer cavity; the breathing port is detachably connected with a filter element. The buffer tank is arranged vertically, and the breathing port is arranged at the bottom end of the buffer tank.

6. The storage and conveying device of the masterbatch according to claim 2, characterized in that: The discharge valve is used to control the sequential output of the masterbatch in the silo when the corresponding silo discharges materials, and the sequential output amounts are equal.

7. The storage and conveying device for color masterbatch according to any one of claims 2 to 6, characterized in that: The discharge valve includes a valve housing connected between the discharge pipe and the hopper, a rotating shaft that horizontally penetrates the valve housing coaxially and rotates around its own axis within the valve housing, rotating plates that are circumferentially arranged outside the rotating shaft and are hermetically attached to the circumferential inner wall and the inner walls at both ends of the valve housing, and a damping unit arranged outside the valve housing and connected to the end of the rotating shaft, used to limit the rotation of the rotating shaft in a specific direction and hinder the rotation of the rotating shaft. The rotating shaft, the valve housing and the rotating plates enclose a plurality of circumferentially arranged and separated material dropping cavities, discharge cavities and transition cavities. The material dropping cavity is connected to the discharge pipe, and the transition cavity is connected to the hopper.

8. The storage and conveying device for masterbatch according to claim 7, characterized in that: The damping unit includes a translation unit, a compression spring, a plug-in part, and a damping disc. The damping disc is coaxially fixed on the rotating shaft, and slots extending along the thickness direction of the damping disc are distributed on the circumferential outer edge thereof. The output end of the translation unit moves along the radial direction of the damping disc and is connected to the plug-in part through the compression spring. The compression spring applies a pressure to the plug-in part to move it towards the axis of the damping disc, so that the plug-in part moves in and out of the slots along with the rotation of the rotating shaft.

9. The storage and conveying device for masterbatch according to claim 7, characterized in that: A negative pressure port communicating with the blanking cavity is further provided on the valve housing. The negative pressure port is communicated with the material bin through the two-way air pump, and a regulating valve is connected to the negative pressure port.

10. The storage and conveying device for masterbatch according to claim 9, characterized in that: The regulating valve is arranged between each discharge valve and the outer shell. The regulating valve includes a regulating motor, a regulating block, and a regulating housing. The regulating housing is horizontally fixed at the bottom of the outer shell. The outer surface of the regulating block is hermetically attached to the inner surface of the regulating housing. The regulating motor and the regulating block rotate in the regulating housing and the rotation axis is perpendicular. The regulating housing is provided with air suction ports corresponding to the negative pressure ports one by one. The regulating block has a regulating channel. A suction pipe communicating with one end of the two-way air pump is fixed in the outer shell. A connection port communicating with the air storage cavity is provided on the suction pipe. The suction pipe is communicated with one end of the regulating channel. The movement track of the regulating block includes a closed position and a communication position corresponding to the material bin one by one. In the closed position, the other end of the suction pipe is directly opposite and attached to the inner wall of the regulating housing. In the communication position, the other end of the suction pipe corresponds to the air suction ports one by one.

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