A storage and conveying device for masterbatch

Abstract

The present invention discloses a masterbatch storage and conveying device, comprising: a housing; silos distributed within the housing, the top and bottom ends of which are connected to a feed pipe and a discharge pipe, respectively, each of which is connected to a feed valve and a discharge valve, respectively; a bottom wall of the housing and the outer walls of each silo enclose an air storage chamber; a pressure regulating assembly having a pressurized state and a depressurized state, wherein the pressure regulating assembly in the pressurized state is used to charge the air in the air storage chamber into the silo when one of the silos is discharging material, and the pressure regulating assembly in the depressurized state is used to charge the air in the silo into the air storage chamber when one of the silos is feeding material; and a hopper connected to the bottom end of the discharge pipe. The masterbatch storage and conveying device selects the air storage chamber to be connected to any of the silos via the pressure regulating assembly. During feeding, air is pumped from the silo into the air storage chamber, creating a negative pressure to facilitate rapid feeding. During discharging, air is pumped from the air storage chamber into the silo, pressurizing the silo to facilitate rapid discharge. The air storage chamber and the silo are isolated from the outside world, reducing maintenance difficulty.

Description

Technical Field

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

[0002] Masterbatch is a polymer colorant, also called pigment concentrate, which is usually made from pigments (or dyes), carrier resins and additives. It has the characteristics of good coloring effect and easy use. Masterbatch has become the mainstream choice for coloring polymer materials due to its high efficiency and stability, and is especially suitable for large-scale production.

[0003] After the masterbatch is processed, it usually needs to be stored in batches and then transported to the packaging machine for packaging. Figure 1 and Figure 2 As shown, a prior art masterbatch storage and conveying device comprises a vertical housing containing multiple vertical silos. A feed pipe and a discharge pipe are located at the top and bottom of the silos, respectively. The feed pipe and the discharge pipe are equipped with feed valves and discharge valves, respectively. The bottom of the discharge pipe is connected to a hopper, and the bottom of the hopper is provided with a discharge pipe. Because gaps between masterbatch particles affect internal air pressure when they are stored in and discharged from the silo, a mesh cover is fixedly connected to the top of the silo. The mesh cover is covered with a layer of filter cotton. With this design, when a batch of masterbatch particles enters the silo through the feed pipe, the air between the masterbatch particles is discharged to the outside through the mesh of the mesh cover and the filter cotton. When the batch of masterbatch particles is discharged from the silo into the hopper and then from the hopper through the discharge pipe, the flow of the masterbatch particles drives the air inside the silo out of the silo. At this time, outside air enters the silo through the filter cotton and the mesh of the mesh cover, ensuring stable air pressure inside the silo.

[0004] Although the above-mentioned storage and conveying device realizes the connection between the inside of the silo and the outside world through the mesh cover and filter cotton, ensuring that the outside air enters the silo after filtering during discharge, after long-term use, it will cause the filter cotton to be blocked, and workers need to climb up to a high place for maintenance regularly. The operation is troublesome and there is a certain risk. Even during normal discharge, due to the presence of the filter cotton, there is a large resistance for the outside air to enter the silo through the filter cotton during discharge, which makes the outside air circulation resistance large and difficult to pass into the silo quickly. During discharge, as the masterbatch and air in the silo decrease, the air pressure in the silo decreases, affecting the smooth and rapid discharge of the remaining masterbatch in the silo. In addition, the discharge valve in the above-mentioned device has a simple structure, and the discharge amount of the masterbatch is controlled by the opening and closing of the discharge valve, which makes it difficult to achieve the discharge of quantitative masterbatch. Quantitative weighing is required in the later process, which increases the structural complexity, process complexity and cost of the entire masterbatch production system.

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

[0006] The purpose of the present invention is to overcome the defects in the prior art and provide a storage and conveying device for masterbatch that is convenient and fast in feeding and discharging, easy in safe maintenance, and can achieve 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 transportation device for masterbatch, comprising:

[0008] The housing is arranged vertically;

[0009] The silos are distributed in the shell along the circumference of the shell and are connected to a feed pipe and a discharge pipe located above and below the shell at their top and bottom ends, respectively. The feed pipe and the discharge pipe are connected to a feed valve and a discharge valve, respectively. The bottom wall of the shell and the outer wall of each silo enclose an air storage cavity.

[0010] a pressure regulating assembly having a pressurized state and a decompressed state, wherein the pressure regulating assembly in the pressurized state is used to charge the gas in the gas storage chamber into the silo when one of the silos is unloading, and the pressure regulating assembly in the decompressed state is used to charge the gas in the silo into the gas storage chamber when one of the silos is feeding;

[0011] The hopper is connected to the bottom end of the discharge pipe and is provided with a discharge port.

[0012] Preferably, in order to realize the mutual flow of air between the air storage chamber and the inner cavity of any silo, to meet the requirement that air enters the silo from the air storage chamber or enters the air storage chamber 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 connected to the air storage chamber, and the other end can be connected to any silo through the switching unit and isolated from the remaining silos.

[0013] Preferably, in order to facilitate the selection of the air storage chamber to be connected to the inner cavity of any silo, 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 rotation axis extends in the vertical direction, so that the switching channel is away from the other end of the two-way air pump and is connected to one of the silos.

[0014] Preferably, in order to achieve precise docking and connection between the air storage chamber and the silo, the rotating unit is a stepper motor, and the silos are distributed in a circular array in the shell 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 silo array angle.

[0015] Preferably, in order to facilitate maintenance and extend the service life of the device, a buffer tank is provided on one side of the outer shell, and a piston is provided in the buffer tank which slides along its axial direction. The piston and the buffer tank are enclosed to form a buffer cavity connected to the air storage cavity, and the buffer tank is also provided with a breathing port which is connected to the outside world and separated from the buffer cavity; the breathing port is detachably connected to a filter element, the buffer tank is vertically arranged, and the breathing port is arranged at the bottom end of the buffer tank.

[0016] Preferably, in order to quantitatively control the output amount of the masterbatch of the device, the discharge valve is used to control the masterbatch in the silo to be output successively and in equal amounts when the silo is discharged.

[0017] Preferably, in order to achieve quantitative output of masterbatch, the discharge valve includes a valve housing connected between the discharge pipe and the hopper, a rotating shaft that is sealed and passes through the valve housing along the horizontal coaxial centerline and rotates around its own axis in the valve housing, a rotating plate distributed in an annular array outside the rotating shaft and sealed to the circumferential inner wall and the inner walls at both ends of the valve housing, a damping unit arranged outside the valve housing and connected to the end of the rotating shaft, for limiting the rotation of the rotating shaft in a specific direction and hindering the rotation of the rotating shaft, the rotating shaft, the valve housing and the rotating plate enclose a blanking cavity, a discharge cavity and a transition cavity that are distributed in an annular array and separated from each other, the blanking cavity is connected to the discharge pipe, and the transition cavity is connected to the hopper.

[0018] Preferably, in order to hinder the rotation of the rotating shaft and the rotating plate, the damping unit includes a translation unit, a compression spring, a plug-in and a damping disk. The damping disk is fixed on the rotating shaft coaxially and has slots extending along its own thickness direction distributed on the circumferential outer edge. The output end of the translation unit moves radially along the damping disk and is connected to the plug-in through the compression spring. The compression spring applies pressure to the plug-in to move toward the axial centerline of the damping disk, so that the plug-in moves in and out of the slot as the rotating shaft rotates.

[0019] Preferably, in order to facilitate the masterbatch to fill the blanking cavity and ensure quantitative output, the valve housing is also provided with a negative pressure port connected to the blanking cavity, the negative pressure port is connected to the silo through the two-way air pump, and the negative pressure port is connected to a regulating valve.

[0020] 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.

[0021] 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

[0022] Figure 1 It is a structural diagram of a storage and conveying device for masterbatch in the prior art;

[0023] Figure 2 yes Figure 1 Schematic diagram of the cross-section structure;

[0024] Figure 3 is a structural diagram of the first embodiment;

[0025] Figure 4 yes Figure 3 Explosion diagram of

[0026] Figure 5 yes Figure 3 Schematic diagram of the cross-section structure;

[0027] Figure 6 yes Figure 5 A magnified view of part A;

[0028] Figure 7 yes Figure 5 Front view of

[0029] Figure 8 is a schematic structural diagram of the second embodiment;

[0030] Figure 9 yes Figure 8 Schematic diagram of the cross-section structure;

[0031] Figure 10 is a schematic structural diagram of a buffer tank according to a second embodiment;

[0032] Figure 11 yes Figure 10 Explosion diagram of

[0033] Figure 12 is a schematic structural diagram of a third embodiment;

[0034] Figure 13 yes Figure 12 Schematic diagram of the cross-section structure;

[0035] Figure 14 yes Figure 13 A magnified view of part B;

[0036] Figure 15 is a partial structural diagram of the third embodiment;

[0037] Figure 16 yes Figure 15 Explosion diagram of

[0038] Figure 17 2 is a schematic structural diagram of a discharge valve according to a third embodiment;

[0039] Figure 18 yes Figure 17 Schematic diagram of the cross-section structure;

[0040] Figure 19 yes Figure 18 Front view of

[0041] Figure 20 yes Figure 17 Explosion diagram of

[0042] Figure 21 yes Figure 20 Magnified view of part C;

[0043] In the figure: 1. Shell; 101. Shell; 1011. Buffer interface; 102. Top cover; 103. Bottom cover; 104. First bolt; 105. First nut; 11. Air storage chamber; 12. Straw; 121. Connecting port; 122. Bottom cover; 123. Top cover; 13. Branch pipe; 14. Mesh cover; 15. Filter cotton; 16. Base; 17. Barometer; 2. Silo; 21. Feed pipe; 211. Side interface; 22. Discharge pipe; 23. Feed Valve; 3. Discharge valve; 31. Valve housing; 311. Blanking chamber; 312. Discharge chamber; 313. Transition chamber; 314. Negative pressure port; 315. Valve cylinder; 316. End plate; 317. Screen; 32. Rotating shaft; 33. Rotating plate; 34. Damping unit; 341. Translation unit; 3411. Translation motor; 3412. Screw; 3413. Screw sleeve; 3414. Distance sensor; 342. Compression spring; 343. Plug-in unit; 3431. Guide wheel; 3432, bracket; 3433, slide bar; 3434, magnet; 3435, slider; 344, damping disc; 3441, slot; 35, negative pressure cover; 351, negative pressure outlet; 36, material guide 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 chamber; 53. Breathing port; 54. Filter element; 541. Filter tube; 542. Filter cloth; 55. Balance tube; 56. Limit inner ring; 6. Regulating valve; 61. Regulating motor; 62. Regulating block; 621. Regulating channel; 63. Regulating shell; 631. Inlet port; 632. Outlet port; 7. Hopper; 71. Discharge pipe; 72. Second bolt; 73. Second nut. DETAILED DESCRIPTION

[0044] The following embodiments are further described in conjunction with the accompanying drawings and examples. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0045] like Figure 1 and Figure 2As shown, the masterbatch storage and conveying device in the prior art includes a vertical and hollow shell 1, and five vertically arranged silos 2 are distributed in a circumferential ring array inside the shell 1. The top and bottom of the silo 2 are respectively fixedly connected with a feed pipe 21 and a discharge pipe 22 protruding from the top and bottom of the shell 1. The feed pipe 21 is connected to a feed valve 23, and the discharge pipe 22 is connected to a discharge valve 3. The feed pipe 21 and the discharge pipe 22 both extend in the vertical direction. The bottom ends of the five discharge pipes 22 are fixedly connected to the same hopper 7. The hopper 7 is a hollow frustum, and its top size is larger than the bottom size. The bottom end of the hopper 7 is fixedly connected to a discharge pipe 71 extending in the vertical direction.

[0046] The five silos 2 are also connected to five L-shaped branch pipes 13 respectively. The horizontal part of the branch pipe 13 is sealed and fixed through the side wall of the shell 1, and the vertical part extends upward and is connected to the mesh cover 14, which is covered with a layer of filter cotton 15.

[0047] In the initial state of the masterbatch storage and conveying device, the discharge valves 3 and feed valves 23 connected to the discharge pipes 22 at the bottom of the five silos 2 are closed. When in use, one of the feed valves 23 is opened, and the masterbatch is input into the corresponding silo 2 through the negative pressure pump, so that the masterbatch fills the silo 2. At the same time, the air inside the silo 2 and between the masterbatch passes through the branch pipe 13 and the mesh cover 14 and is discharged to the outside through the filter cotton 15. Then, the feed valve 23 is closed to complete the feeding of the masterbatch in the silo 2. Then, the feeding work of the remaining four silos 2 is carried out according to the above steps.

[0048] When it is necessary to discharge and package the masterbatches, the discharge valve 3 corresponding to one of the silos 2 is opened, allowing the masterbatches to fall downward from the silo 2, pass through the discharge pipe 22, and enter the hopper 7. The masterbatches then fall downward within the hopper 7 and are discharged downward through the discharge pipe 71. The packaging machine then packages the fallen masterbatches until all the masterbatches in that silo 2 have been discharged. The discharge valve 3 is then closed, completing the discharge of the masterbatches in the silo 2. The remaining four silos 2 are then discharged in sequence. When the masterbatches are discharged, the outside air is filtered through the filter cotton 15, enters the mesh cover 14, and then enters the silo 2 through the branch pipe 13 to prevent negative pressure from forming within the silo 2, which would affect the discharge of the masterbatches.

[0049] In the above-mentioned feeding and discharging work process, since the air inside and outside the silo 2 needs to pass through the filter cotton 15, there is a large resistance to the air flow, which affects the feeding and discharging of the masterbatch. Moreover, when discharging, since the outside air contains dust particles and impurities, it is necessary to use the filter cotton 15 to filter it. As a result, after long-term use, dust particles and impurities are easily accumulated on the surface of the filter cotton 15, affecting the flow of air. Therefore, the staff needs 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 risk.

[0050] Based on the above situation, the present invention discloses three embodiments of masterbatch storage and conveying devices, as described below.

[0051] First embodiment

[0052] like Figure 3-Figure 7 As shown, a masterbatch storage and conveying device according to a first embodiment of the present invention includes:

[0053] Housing 1, vertically arranged;

[0054] The silos 2 are distributed within the shell 1 along the circumference thereof and are connected at their top and bottom ends to a feed pipe 21 and a discharge pipe 22 located above and below the shell 1, respectively. The feed pipe 21 and the discharge pipe 22 are connected to a feed valve 23 and a discharge valve 3, respectively. The bottom wall of the shell 1 and the outer wall of each silo 2 enclose an air storage chamber 11.

[0055] The pressure regulating assembly 4 has a pressurized state and a decompressed state. The pressure regulating assembly 4 in the pressurized state is used to charge the gas in the gas storage chamber 11 into the silo 2 when one of the silos 2 is unloading. The pressure regulating assembly 4 in the decompressed state is used to charge the gas in the silo 2 into the gas storage chamber 11 when one of the silos 2 is feeding.

[0056] The hopper 7 is connected to the bottom end of the discharge pipe 22 and is provided with a discharge port at the bottom end.

[0057] In this embodiment, the number of silos 2 is also five, but of course, other numbers are possible depending on actual needs. When feeding, the device adjusts the pressure regulating assembly 4 to a reduced pressure state, selects a specific silo 2, closes the corresponding feed valve 23 and discharge valve 3 of the silo 2, and draws the air in the silo 2 into the air storage chamber 11, creating a negative pressure in the silo 2. The corresponding feed valve 23 of the silo 2 is then opened, and the pressure regulating assembly 4 continues to draw air from the silo 2. A large amount of masterbatch is delivered to the silo 2 via a negative pressure pump. Since the negative pressure in the silo 2 is maintained, the masterbatch can be quickly filled into the silo 2.

[0058] When discharging is required, the pressure regulating component 4 is adjusted to the pressurized state, and a specific silo 2 is selected. The air in the air storage chamber 11 is transported to the silo 2, so that the silo 2 is in a high-pressure state. The air pressure in the silo 2 is greater than the external air pressure, and the discharge valve 3 corresponding to the silo 2 is opened. At the same time, the pressure regulating component 4 continues to transport the air in the air storage chamber 11 to the silo 2. Under the action of high pressure, the masterbatch accumulated in the silo 2 can be quickly discharged from the silo 2, enter the hopper 7 through the discharge pipe 22, and then be discharged from the discharge port of the hopper 7. After being received by the packaging machine, the batch of masterbatch is packaged.

[0059] Unlike the prior art, the air storage chamber 11 inside the shell 1 of this embodiment 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 maintains a negative pressure state during feeding, which is convenient for rapid feeding of the silo 2, and is transported into the corresponding silo 2 during discharging. The masterbatch in the silo 2 is discharged through high pressure to achieve rapid discharging, which is beneficial to improving work efficiency; and since the air storage chamber 11 is isolated from the outside world, there is no need for filter cotton 15 to filter the outside air, which reduces the resistance to air flow and further facilitates rapid feeding and discharging.

[0060] Specifically, the shell 1 of this embodiment includes a shell barrel 101 extending in the vertical direction, and the outer edges of both ends of the shell barrel 101 are provided with outer flanges. The outer flange at the top is fixedly connected to a horizontal top cover 102 by a first bolt 104 and a first nut 105 connected by thread, and the outer flange at the bottom is fixedly connected to a horizontal bottom cover 103 by a first bolt 104 and a first nut 105 connected by thread; For the silo 2, it includes an upper cylindrical portion and a cone fixed to the lower portion of the upper cylindrical portion with a coaxial centerline. The top of the upper cylindrical part is fixed to the bottom of the top cover 102, and the bottom end of the lower conical cylindrical part is fixed to the top of the bottom cover 103. The feed pipe 21 is integrally formed and fixed to the top of the top cover 102 and is connected to the top of the upper cylindrical part. The discharge pipe 22 is welded and fixed to the bottom of the bottom cover 103 and the bottom end is fixedly connected to a frustum-shaped and hollow hopper 7. The bottom end of the hopper 7 is the discharge port, and the discharge port is fixedly connected to a downward extending discharge pipe 71 through a second bolt 72 and a second nut 73 connected by threads.

[0061] A further improvement is that the pressure regulating assembly 4 includes a bidirectional air pump 41 and a switching unit 42. One end of the bidirectional air pump 41 is connected to the air storage chamber 11, and the other end can be connected to any one of the silos 2 through the switching unit 42 and isolated from the remaining silos 2.

[0062] With the above design, the switching unit 42 is used to select the air storage chamber 11 to be connected to one of the silos 2 through the two-way air pump 41, while the air storage chamber 11 remains isolated from the remaining silos 2. In this way, the two-way air pump 41 adjusts its air extraction and exhaust direction to achieve the working state conversion of the pressure regulating component 4, that is, in the pressurized state, the two-way air pump 41 extracts the air in the air storage chamber 11 and transports it to the silo 2, thereby increasing the pressure in the silo 2 and facilitating discharging; and in the decompressed state, the two-way air pump 41 extracts the air in the silo 2 and transports it to the air storage chamber 11, thereby reducing the air pressure in the silo 2 and facilitating feeding.

[0063] The switching unit 42 includes a rotating unit 421 and a switching valve 422. The switching valve 422 has a switching channel 4221 connected to the two-way air pump 41. The rotating unit 421 drives the switching valve 422 to rotate and the rotating axis extends along the vertical direction, so that the other end of the switching channel 4221 away from the two-way air pump 41 is connected to one of the silos 2; the rotating unit 421 is a stepper motor, and the silos 2 are distributed in a circular array 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 silo 2.

[0064] Specifically, such as Figure 4-Figure 7 As shown, a side interface 211 is provided on the side wall of the feed pipe 21, and the side interface 211 is located below the feed valve 23 and toward the axial center line of the circular array distribution of the silo 2. The switching unit 42 also includes a switching cover 423, and the switching cover 423 is fixed above the top cover 102 and enclosed with the top cover 102 to form a cylindrical switching chamber. The switching valve 422 is cylindrical and adapted to the switching chamber and sealed to the inner wall of the switching chamber. The extension trajectory of the switching channel 4221 is L-shaped.

[0065] The switching cover 423 is provided with five docking ports distributed in a circular array, and the five docking ports are connected one-to-one with the side ports 211 corresponding to the five silos 2. The switching channel 4221 includes a connected transverse channel and a longitudinal channel. The longitudinal channel extends downward and its axis coincides with the axis of the distribution of the silo 2 and the axis of the outer shell 1. The transverse channel is at the same height as the docking port and the side port 211; and 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 transverse channel away from the longitudinal channel is connected to one of the docking ports). Of course, its step angle can also be other approximate multiples 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.

[0066] The top cover 102 is provided with a top connecting port connected to the bottom end of the longitudinal channel. The two-way air pump 41 is fixed on the inner side of the shell 101. Its top end is connected to the top connecting port and its bottom end is connected to the air storage chamber 11. The two-way air pump 41 is located at the center of the distribution of the five silos 2.

[0067] With this design, the rotation angle of the rotating unit 421 can be precisely controlled, so that 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 connecting port. At the same time, after the switching valve 422 is rotated to a certain angle, the transverse channel of the switching valve 422 can be connected to the side port 211 away from the end of the longitudinal channel through the corresponding docking port. In this state, the top of the two-way air pump 41, the fixed connecting port, the switching channel 4221, the docking port, the side port 211, the feed pipe 21 and the silo 2 are kept connected in sequence, that is, the air storage chamber 11 can be connected to a specific silo 2 through the two-way air pump 41, while the remaining four silos 2 are kept isolated from the air storage chamber 11, thereby facilitating the control of the silo 2 correspondingly connected to the two-way air pump 41 to be pressurized for discharge or depressurized for feeding.

[0068] The outer peripheral fixed sleeve of the hopper 7 is provided with a horizontal base 16 , and the position of the hopper 7 and the shell 1 can be fixed conveniently by fixing the position of the base 16 .

[0069] The top cover 102 is also fixed with barometers 17 corresponding to the five silos 2 one by one. The detection end of the barometer 17 extends downward to the top of the silo 2, which is convenient for detecting the pressure inside the silo 2; the bottom cover 103 is also fixed with a barometer 17, and its detection end extends upward to the inside of the air storage cavity 11, which is convenient for detecting the pressure inside the air storage cavity 11.

[0070] Second embodiment

[0071] like Figures 8-11 As shown, a storage and conveying device for masterbatch according to the second embodiment of the present invention is based on the first embodiment, with the difference that a buffer tank 5 is provided on one side of the outer shell 1, and a piston 51 is provided in the buffer tank 5 which slides along its axial direction and is sealed with its circumferential inner wall. The piston 51 and the buffer tank 5 are enclosed to form a buffer cavity 52 connected to the air storage cavity 11, and the buffer tank 5 is also provided with a breathing port 53 which is connected to the outside and separated from the buffer cavity 52.

[0072] With this design, during the process of pumping air from 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, thereby increasing the gas capacity and reducing the pressure on the outer shell 1, which is beneficial to extending the service life of the outer shell 1. Moreover, the breathing port 53 is connected to the outside world and separated from the buffer chamber 52, which facilitates the axial movement of the piston 51 along the buffer tank 5, so as to automatically adjust the position of the piston 51 according to the amount of gas in the buffer chamber 52, thereby reducing the pressure on the buffer tank 5 and the outer shell 1 and extending the service life of the device.

[0073] A further improvement is that the breathing port 53 is detachably connected to a filter element 54 , the buffer tank 5 is vertically arranged, and the breathing port 53 is arranged at the bottom end of the buffer tank 5 .

[0074] Specifically, the buffer tank 5 is fixed above the base 16 by supporting legs, and the breathing port 53 is arranged at the bottom of the buffer tank 5 and is detachably connected to a filter element 54. The filter element 54 can filter out ash trough impurities in the external air to prevent them from entering the buffer tank 5 and affecting the sealing between the piston 51 and the inner wall of the buffer tank 5. The breathing port 53 is arranged at the bottom, which is convenient for replacing the filter element 54 at a low position, thereby facilitating maintenance and avoiding the danger caused by climbing at heights. The breathing port 53 is arranged at the bottom position, which can reduce the chance of dust accumulation on the surface of the filter element 54 and extend the service and replacement cycle of the filter element 54.

[0075] A balancing pipe 55 communicating with the buffer chamber 52 is fixed to the upper side wall of the buffer tank 5 , and a buffer interface 1011 communicating with the air storage chamber 11 is provided on the side wall of the shell 101 . The buffer interface 1011 is communicated with the balancing pipe 55 , thereby achieving communication between the air storage chamber 11 and the buffer chamber 52 .

[0076] Two limiting inner rings 56 are integrally formed on the circumferential inner wall of the buffer tank 5 and are distributed along its axial direction under the balance pipe 55. The piston 51 moves between the two limiting inner rings 56 in the vertical direction. The two limiting inner rings 56 limit the movement range of the piston 51 to prevent it from moving to the top or bottom of the buffer tank 5.

[0077] The piston 51 includes a movable ring 511 that is coaxial with the buffer tank 5. The circumferential outer edge of the movable ring 511 is fixedly connected to a rubber ring 513. The elastic deformation of the rubber ring 513 ensures the sealing between the piston 51 and the circumferential inner wall of the buffer tank 5; a rubber plate 512 is fixed to the inner side of the movable ring 511. With this design, when the pressure inside the buffer chamber 52 changes, in addition to the axial movement of the movable ring 511, the rubber plate 512 can undergo corresponding deformation. For example, when the pressure inside the buffer chamber 52 increases, the rubber plate 512 can bulge downward to adapt to the pressure change. At the same time, the downward deformation of the rubber plate 512 increases the gas capacity of the buffer chamber 52.

[0078] The filter element 54 includes a filter tube 541, which is threadedly connected to the breathing port 53. The bottom of the filter tube 541 is a circular plate with dense through holes, and the circular plate is covered with filter cloth 542. This facilitates the quick and detachable connection between the filter element 54 and the breathing port 53, and also facilitates the disassembly, cleaning and maintenance of the filter element 54.

[0079] Third embodiment

[0080] like Figure 12-Figure 21 As shown, a storage and conveying device for masterbatches according to the third embodiment of the present invention is based on the second embodiment, with the difference that the discharge valve 3 is used to control the successive output of the masterbatches in the silo 2 when the silo 2 discharges the material, and the successive output amounts are equal.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] A further improvement is that the valve housing 31 is further provided with a negative pressure port 314 communicating with the blanking cavity 311 , the negative pressure port 314 is communicated with the silo 2 through a two-way air pump 41 , and the negative pressure port 314 is connected to a regulating valve 6 .

[0086] With this design, when discharging, the regulating valve 6 is opened, so that the blanking chamber 311 is connected to 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 is connected. The two-way air pump 41 is started, and the air in the air storage chamber 11 and the blanking chamber 311 is extracted and transported to the hopper 7, so that the pressure in the blanking chamber 311 is reduced, that is, the internal air pressure below the masterbatch is reduced, and the air pressure above the masterbatch is increased, so that the masterbatch can quickly fill the blanking chamber 311. Combined with the increase in air pressure in the silo 2, the high-pressure gas exerts pressure on the masterbatch, so as to promote the rotation of the rotating plate 33. The power is greater than the resistance of the damping unit 34, so that the rotating plate 33 rotates, and the masterbatch filling the blanking chamber 311 enters the discharge chamber 312 as the rotating plate 33 rotates, falls downward in the discharge chamber 312 into the hopper 7, and is then discharged from the discharge pipe 71.

[0087] A further improvement is that the regulating valve 6 is arranged between each discharge valve 3 and the housing 1, and 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 to the bottom of the housing 1, and the outer surface of the regulating block 62 is sealed 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 inlet 631 corresponding to the negative pressure port 314. The regulating block 62 has an adjusting Channel 621, a suction pipe 12 connected to one end of the two-way air pump 41 is fixed in the outer shell 1, and a connecting port 121 connected to the air storage chamber 11 is provided on the suction pipe 12. The suction pipe 12 is connected to one end of the adjustment channel 621, and the activity trajectory of the adjustment block 62 includes a closed position and a connecting position corresponding to the silo 2 one by one. In the closed position, the other end of the suction pipe 12 is facing the inner wall of the adjustment shell 63, and in the connecting position, the other end of the suction pipe 12 corresponds one by one to the air intake port 631.

[0088] Specifically, such as Figure 14 and Figure 16As shown, 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 and is coaxial with the shell cylinder 101. Five air inlets 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 top center. The regulating block 62 is located in the regulating shell 63 and the outer surface of the regulating block 62 is sealed 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 seals through the bottom wall of the regulating shell 63 and then connects with the regulating block 6 2 are fixedly connected coaxially, the adjustment motor 61 is a stepping motor, and its step angle is 36° (it should be noted that the step angle of the adjustment motor 61 is divisible 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 adjustment motor 61, and the multiple is an integer). The adjustment block 62 is provided with an adjustment channel 621 extending along an L-shaped track. The adjustment channel 621 includes a horizontal channel and a vertical channel. The vertical channel is connected to the air outlet 632 coaxially, and the end of the horizontal channel away from the vertical channel is in contact with the cylindrical surface where the circumferential inner wall of the adjustment housing 63 is located.

[0089] A mounting hole is provided at the center of the bottom cover 103. A straw 12 extending in a vertical direction is further provided in the shell tube 101. The straw 12 is coaxial with the shell tube 101. A bottom cover 122 is provided at the bottom end of the straw 12. The bottom cover 122 is provided at the mounting hole, and a barometer 17 is provided on the bottom cover 103. The detection end of the barometer 17 is located in the bottom cover 122. A top cover 123 is provided at the top of the straw 12. A flange is provided at the bottom end of the two-way air pump 41. The flange fixing cover is provided on the top cover 123. The connecting port 121 is provided on the side wall of the top cover 123.

[0090] After adopting the above structural design, the regulating motor 61 can drive the regulating block 62 to rotate around its own axis. In the initial state, the end of the horizontal channel of the regulating block 62 away from the vertical channel is connected to one of the air inlets 631. Therefore, in the initial state, the regulating block 62 is in the connecting position. When the two-way air pump 41 injects air into the silo 2, the air at its air inlet end comes from two parts, one part of which is the air in the air storage chamber 11, which enters the top cover 123 through the connecting port 121 and is then drawn away by the two-way air pump 41. The other part is from one of the discharge valves 3. The air in the blanking chamber 311 can pass through the negative pressure port 314, the air inlet 631, the regulating channel 621, the air outlet 632, the bottom cover 122, the suction pipe 12 and After the top cover 123 is turned, it is then drawn away by the two-way air pump 41; if the regulating motor 61 drives the regulating block 62 to rotate once, the regulating block 62 is in a closed position, the horizontal channel is opposite to the inner wall of the regulating block 62, and is blocked by the air inlet 631. At this time, the two-way air pump 41 only draws air from the air storage chamber 11. If the regulating motor 61 drives the regulating block 62 to rotate to one side again, the regulating block 62 is in another connecting position (it should be noted that the number of connecting positions of the regulating block 62 is equal to the number of silos 2 and corresponds one to one), the horizontal channel is connected to another air inlet 631, and the two-way air pump 41 sucks air from the negative pressure port 314 of the discharge valve 3 corresponding to another silo 2, and discharges the material from the other silo 2. Therefore, through the above structure, the connection 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.

[0091] 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, and the detection end of the barometer 17 extends downward into the buffer cavity 52 to detect the air pressure in the buffer cavity 52.

[0092] A further improvement is that the damping unit 34 includes a translation unit 341, a compression spring 342, a plug-in 343 and a damping disk 344. The damping disk 344 is fixed on the rotating shaft 32 coaxially and has slots 3441 extending along its own thickness direction distributed on the circumferential outer edge. The output end of the translation unit 341 moves radially along the damping disk 344 and is connected to the plug-in 343 through the compression spring 342. The compression spring 342 applies pressure to the plug-in 343 to move toward the axial centerline of the damping disk 344, so that the plug-in 343 moves in and out of the slot 3441 as the rotating shaft 32 rotates.

[0093] After adopting the above design, the compression spring 342 applies pressure to the plug 343 to move toward the axis of the damping disk 344, so that the plug 343 has a tendency to move toward the center of the damping disk 344. As the damping disk 344 rotates, when the damping disk 344 rotates to one of the slots 3441 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 disk 344 and limiting the rotation direction of the damping disk 344, achieving the purpose of counter-rotation. The limitation of the rotation direction of the shaft 32 and the rotating plate 33 and the obstruction of rotation require a certain amount of high-pressure gas to push the masterbatch to move downward in the hopper 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, and the elastic force of the compression spring 342 on the plug-in 343 can be adjusted to avoid the obstruction effect of the damping unit 34 being too small to affect the quantitative output of the device, and the obstruction effect of the damping unit 34 being too large to affect the discharge efficiency.

[0094] The specific structure of the discharge valve 3 is as follows Figure 14 、 Figures 17-21 As shown, the valve housing 31 of the discharge valve 3 includes a horizontal valve cylinder 315 and an end plate 316 with a fixed cover arranged at both ends of the valve cylinder 315. The curved surface of the circumferential inner wall of the valve cylinder 315 is an axially horizontal cylindrical surface. The valve cylinder 315 is connected to the bottom end of the discharge pipe 22 as a whole. A negative pressure port 314 is provided on the upper side of the valve cylinder 315. A circular arc-shaped mesh plate 317 is fixed on the inner side of the negative pressure port 314. The mesh plate 317 is sealed with mesh holes. The aperture of the mesh holes is smaller than the particle size of the masterbatch to prevent the masterbatch from being drawn out of the blanking cavity 311 from the negative pressure port 314 when the air is exhausted. The discharge cavity 312 is located directly below the blanking cavity 311, and the transition cavity 313 is located at the bottom of the blanking cavity 311. Between the discharge chamber 312 and the blanking chamber 311, a negative pressure cover 35 is arranged on the same side as the negative pressure port 314. The negative pressure cover 35 is arranged on the negative pressure port 314 and is enclosed with the outer wall of the valve shell 31 to form a negative pressure chamber. The negative pressure cover 35 is provided with a negative pressure outlet 351 connected to the negative pressure chamber on the inner wall facing away from the valve shell 31. The negative pressure outlet 351 is connected to the air intake 631 of the regulating shell 63. In this way, when the two-way air pump 41 draws air from the discharge valve 3, the air in the blanking chamber 311 can pass through the mesh of the mesh plate 317, the negative pressure chamber, the negative pressure outlet 351 and the air intake 631 in sequence into the regulating channel 621 of the regulating block 62.

[0095] The bottom end of the valve cylinder 315 is integrally connected to an output pipe 37 that is in communication with the discharge chamber 312. The bottom end of the output pipe 37 is in communication with the hopper 7, so that the masterbatch can change its position through the rotating plate 33 and enter the discharge chamber 312, and then fall downward along the output pipe 37. A material guide slope 36 is fixed on the inner wall of the output pipe 37 to guide the masterbatch into the hopper 7.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] 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.

[0101] Two magnets 3434 are also fixed to the slider 3435 and the bracket 3432, respectively, facing each other. The two magnets 3434 repel each other, thereby increasing the resistance to the rotation of the damping disc 344, reducing the burden on the compression spring 342, and preventing the compression spring 342 from being damaged by excessive force. The valve cylinder 315 is also provided with a counter 38 facing the edge of one of the damping discs 344. The counter 38 is used to detect the number of slots 3441 passing through its height position. Since the slots 3441 are evenly spaced around the outer periphery of the damping disc 344, the rotation angle of the damping disc 344, the rotating shaft 32, and the rotating plate 33 can be determined by detecting the number of slots 3441 that pass through. The resistance of the damping unit 34 is adjusted in conjunction with the translation unit 341 to realize the opening and closing of the discharge valve 3, thereby controlling the connection and isolation between the discharge pipe 22 and the hopper 7.

[0102] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A storage and conveying device for masterbatch, characterized in that: include: The housing is arranged vertically; The silos are distributed in the shell along the circumference of the shell and are connected to a feed pipe and a discharge pipe located above and below the shell at their top and bottom ends, respectively. The feed pipe and the discharge pipe are connected to a feed valve and a discharge valve, respectively. The bottom wall of the shell and the outer wall of each silo enclose an air storage cavity. a pressure regulating assembly having a pressurized state and a decompressed state, wherein the pressure regulating assembly in the pressurized state is used to charge the gas in the gas storage chamber into the silo when one of the silos is unloading, and the pressure regulating assembly in the decompressed state is used to charge the gas in the silo into the gas storage chamber when one of the silos is feeding; A hopper is connected to the bottom end of the discharge pipe and is provided with a discharge port at the bottom end; the pressure regulating assembly includes a bidirectional air pump and a switching unit, one end of the bidirectional air pump is connected to the air storage chamber, and the other end can be connected to any one of the silos through the switching unit and isolated from the remaining silos; A buffer tank is provided on one side of the shell, and a piston is provided in the buffer tank, which slides along its axial direction and is sealed. The piston and the buffer tank enclose a buffer cavity connected to the air storage cavity. The buffer tank is also provided with a breathing port connected to the outside and isolated from the buffer cavity; the breathing port is detachably connected to a filter element, the buffer tank is vertically arranged, and the breathing port is provided at the bottom end of the buffer tank; The discharge valve includes a valve housing connected between the discharge pipe and the hopper, a rotating shaft sealingly passing through the valve housing along a horizontal coaxial centerline and rotating around its own axis in the valve housing, rotating plates distributed in an annular array outside the rotating shaft and sealingly fitting with the circumferential inner wall and the inner walls at both ends of the valve housing, a damping unit provided outside the valve housing and connected to the end of the rotating shaft, for limiting the rotation of the rotating shaft in a specific direction and hindering the rotation of the rotating shaft, the rotating shaft, the valve housing and the rotating plate enclose a blanking cavity, a discharge cavity and a transition cavity distributed in an annular array and separated from each other, the blanking cavity is connected to the discharge pipe, and the transition cavity is connected to the hopper; The damping unit includes a translation unit, a compression spring, a plug-in and a damping disk. The damping disk is fixed on the rotating shaft coaxially and has slots extending along its own thickness direction distributed on the circumferential outer edge. The output end of the translation unit moves along the radial direction of the damping disk and is connected to the plug-in through the compression spring. The compression spring applies pressure to the plug-in to move toward the axial centerline of the damping disk, so that the plug-in moves in and out of the slot as the rotating shaft rotates.

2. The masterbatch storage and conveying device according to claim 1, 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 rotation axis extends in the vertical direction so that the other end of the switching channel is away from the two-way air pump and connected to one of the silos.

3. The masterbatch storage and conveying device according to claim 2, characterized in that: The rotating unit is a stepping motor, and the silos are distributed in a circular array in 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 angle of the silo array.

4. The masterbatch storage and conveying device according to claim 1, characterized in that: The discharge valve is used to discharge the masterbatch in the silo in sequence when the silo is discharged, and the output amounts are equal.

5. The masterbatch storage and conveying device according to claim 1, characterized in that: The valve housing is further provided with a negative pressure port connected to the blanking cavity. The negative pressure port is connected to the silo through the bidirectional air pump. The negative pressure port is connected to a regulating valve.

6. The masterbatch storage and conveying device according to claim 5, characterized in that: The regulating valve is arranged between each discharge valve and the shell, and the regulating valve comprises a regulating motor, a regulating block and a regulating shell, and the regulating shell is horizontally fixed to the bottom of the shell, and the outer surface of the regulating block is sealed with the inner surface of the regulating shell, and the regulating motor and the regulating block rotate in the regulating shell and the rotation axis is perpendicular to the regulating shell, and the regulating shell is provided with a suction port corresponding to the negative pressure port one by one, and the regulating block has a regulating channel, and a suction pipe connected to one end of the two-way air pump is fixed in the shell, and a connecting port connected to the air storage chamber is provided on the suction pipe, and the suction pipe is connected with one end of the regulating channel, and the moving trajectory of the regulating block includes a closed position and a connecting position corresponding to the silo one by one, and in the closed position, the other end of the suction pipe is facing the inner wall of the regulating shell, and in the connecting position, the other end of the suction pipe corresponds to the suction port one by one.

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