Screw feeder for preparing acetaminophen

Abstract

The invention relates to the technical field of acetaminophen feeding, and particularly provides a spiral feeder for preparing acetaminophen, which comprises a premixing barrel, a spiral feeding mechanism, an integrated locking mechanism, a spiral quantitative feeding mechanism and a synchronous driving mechanism. The multiple spiral quantitative feeding mechanisms are matched with the rotating shaft in the premixing barrel and the premixing conveying piece to conduct premixing spiral feeding on raw materials, when the raw materials are put into the reaction kettle, the spiral feeding machine does not need to be continuously replaced to be connected with a feeding port of the reaction kettle, the problems that operation is tedious, and time and labor are wasted are solved, and the production efficiency is improved. The raw materials can be premixed before entering the reaction kettle, the acetaminophen preparation efficiency is greatly improved, the rotating shaft drives the multiple material stirring sets to stir the raw materials in the corresponding feeding hoppers through the synchronous driving mechanism, and therefore the function of integrated driving of the rotating shaft and the multiple material stirring sets is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of acetaminophen feeding, and specifically provides a screw feeder for preparing acetaminophen. Background Art

[0002] Acetaminophen, also known as paracetamol, is a commonly used over-the-counter drug, mainly used to relieve mild to moderate pain (such as headache, muscle pain, joint pain, etc.) and reduce fever. In the preparation process of acetaminophen, the screw feeder is a key equipment, which is used to quantitatively add p-nitrophenol (raw material) and other auxiliary reagents (such as iron powder, zinc powder or catalyst) into the reactor.

[0003] At present, the screw feeder used for feeding raw materials into the reactor during the preparation of acetaminophen can only quantitatively transport a single raw material into the reactor. When the raw material is fed into the reactor, the screw feeder needs to be continuously replaced and connected to the feed port of the reactor. The operation is cumbersome, time-consuming and labor-intensive, which reduces the efficiency of acetaminophen preparation and also has a high equipment investment cost. Summary of the invention

[0004] In view of the above problems, an embodiment of the present application provides a screw feeder for preparing acetaminophen to solve the technical problems in the related art.

[0005] In order to achieve the above-mentioned purpose, the embodiment of the present application provides the following technical scheme: a screw feeder for preparing acetaminophen, comprising: a premixing barrel, the lower end of the premixing barrel is in a funnel structure and a rotating shaft is rotatably connected therein, a premixing conveying member is arranged on the rotating shaft, a spiral feeding mechanism is installed at the lower end of the premixing barrel, the spiral feeding mechanism is used for obliquely conveying the premixed raw materials to the reactor, the spiral feeding mechanism comprises an inclined cylinder fixedly installed at the lower end of the premixing barrel and connected to the premixing barrel, a spiral feeding blade is rotatably connected inside the inclined cylinder, a discharge port is arranged on the lower side wall of the upper end of the inclined cylinder, the discharge port of the inclined cylinder is used for connecting with the feed port of the reactor to convey the raw materials into the reactor, and the outer wall of the premixing barrel near its upper end is provided with mounting holes evenly arranged along its circumference, and the mounting holes are in a conical structure.

[0006] The spiral feeding mechanism and the pre-mixing barrel are both fixed on a support base, and a roller for driving the entire device to move is installed at the bottom of the support base.

[0007] In a possible implementation, the premixing conveying element includes a plurality of stirring rods fixedly mounted on a rotating shaft and swirl blades fixedly sleeved on the rotating shaft, wherein the diameter of the swirl blades gradually decreases downward, and the swirl blades are located below the stirring rods.

[0008] An integrated locking mechanism is installed in the premixing barrel, and a spiral quantitative feeding mechanism is detachably installed on the mounting hole. The integrated locking mechanism is used to lock multiple spiral quantitative feeding mechanisms on the premixing barrel at the same time. A supporting group for supporting the spiral quantitative feeding mechanism is also installed on the outer wall of the premixing barrel.

[0009] The spiral quantitative feeding mechanism includes a feed hopper, a conveying cylinder is fixedly installed at the discharge port of the feed hopper, a spiral conveying blade is rotatably connected inside the conveying cylinder, the lower end of the feed hopper is a conical structure and is equipped with a material shifting group, the material shifting group is used to shift the raw materials in the feed hopper; the pre-mixing barrel and the rotating shaft are jointly equipped with a synchronous driving mechanism that drives multiple material shifting groups when the rotating shaft rotates.

[0010] In one possible implementation, the material shifting group includes an annular groove opened in the feed hopper, a rotating ring is rotatably connected in the annular groove, a material blocking ring is installed in the feed hopper and is located above the rotating ring, the inner ring surface of the material blocking ring is a cone with a diameter gradually decreasing downward to prevent the raw material from entering the gap between the rotating ring and the annular groove, a material shifting piece is installed on the inner ring surface of the rotating ring, an arc groove connected to the annular groove is opened on the side wall of the feed hopper, and an arc rack is installed on the rotating ring through a connecting rod that slides through the arc groove.

[0011] In a possible implementation, the material shifting member includes a rice-shaped frame installed on the inner surface of a rotating ring, and the lower end surface of each horizontal segment of the rice-shaped frame is equipped with shifting rods evenly arranged and inclined along the length direction of the horizontal segment.

[0012] In one possible implementation, the support group includes an arc-shaped support seat and an open support ring which are evenly arranged along the circumference of the outer wall of the premixing barrel and are installed by a bracket. The open support ring is located above the arc-shaped support seat and its opening is facing the side away from the premixing barrel. The open support ring is used to support the conical outer wall of the feed hopper.

[0013] In one possible implementation, the integrated locking mechanism includes a push and clamping group installed in the premixing barrel and evenly arranged along the circumference thereof, a downward driving group driving multiple push and clamping groups is installed in the premixing barrel, a conical ring and a fixed clamping ring are provided on a fixed sleeve on the side of the outer wall of the conveying barrel away from the feed hopper, the fixed clamping ring is located on the side of the conical ring away from the feed hopper, a conical sealing ring is provided on the outer ring surface of the conical ring, and the push and clamping group is used to push the fixed clamping ring to move toward the rotating shaft after the fixed clamping ring enters the premixing barrel.

[0014] In a possible implementation manner, the pushing and pressing group includes a plurality of pushing rods rotatably connected to the inner wall of the pre-mixing barrel through a bracket. The plurality of pushing rods are evenly arranged circumferentially along the corresponding mounting holes. Two fixed cylinders symmetrically arranged circumferentially along the mounting holes are installed on the inner wall of the pre-mixing barrel. A guide rod is slidably connected to the fixed cylinder, and a first return spring is installed between the guide rod and the fixed cylinder. The two guide rods are commonly installed with a pressing ring at one end far from the first return spring. The pressing ring is slidably connected to the side of the pushing rod far from the pre-mixing barrel.

[0015] In a possible implementation manner, the downward pressing drive group includes a lifting disk slidably sleeved on the rotating shaft up and down. The lower end surface of the lifting disk is installed with pressing heads evenly arranged along its circumference through connecting columns. A U-shaped frame is installed on the side of the pressing ring far from the inner wall of the pre-mixing barrel. A wedge block is installed in the middle of the vertical section of the U-shaped frame. The pressing head is triangular and a ball cooperating with the wedge block is installed on the inclined surface. When the pressing head moves downward, it rolls into contact with the wedge block through the ball and pushes the wedge block.

[0016] In a possible implementation manner, the synchronous drive mechanism includes support cylinders evenly arranged circumferentially on the outer wall of the pre-mixing barrel. A reciprocating moving rod is slidably connected to both the support cylinder and the side wall of the pre-mixing barrel. A second return spring is installed between the reciprocating moving rod and the support cylinder. One end of the reciprocating moving rod slidably penetrates into the pre-mixing barrel. A moving rack meshing and driving with the arc-shaped rack is installed at the other end of the reciprocating moving rod. A drive group for driving a plurality of reciprocating moving rods is installed on the rotating shaft. The reciprocating moving rods and the connecting columns are arranged in a staggered manner.

[0017] In a possible implementation manner, the drive group includes a rotating disk fixedly sleeved on the rotating shaft. Arc-shaped convex blocks are installed on the side wall of the rotating disk and are evenly arranged circumferentially along it. The arc-shaped convex blocks are located within the circumference formed by a plurality of circumferentially arranged connecting columns to avoid the arc-shaped convex blocks colliding with the connecting columns when the rotating disk drives the arc-shaped convex blocks to rotate. A ball is rotatably connected to one end of the reciprocating moving rod located in the pre-mixing barrel.

[0018] One or more of the above technical solutions in the embodiments of the present invention have at least the following beneficial effects: 1. The spiral feeder for preparing paracetamol designed by the present invention uses a plurality of spiral quantitative feeding mechanisms in cooperation with the rotating shaft and the pre-mixing and conveying parts in the pre-mixing barrel to perform pre-mixing spiral feeding on raw materials. When the raw materials are put into the reaction kettle, there is no need to continuously replace the connection between the spiral feeder and the feeding port of the reaction kettle, avoiding the problems of cumbersome operation, time-consuming and laborious. Moreover, it can pre-mix a variety of raw materials before the raw materials enter the reaction kettle, greatly improving the efficiency of paracetamol preparation.

[0019] 2. The premixing barrel of the present invention is connected to the multiple spiral quantitative feeding mechanisms through an integrated locking mechanism, which is convenient for cleaning and maintenance, and improves the stability of the connection between the multiple spiral quantitative feeding mechanisms and the premixing barrel and the convenience of installation and disassembly.

[0020] 3. In the process of driving the premixing conveying member to premix and convey the raw materials, the rotating shaft in the premixing barrel of the present invention also drives multiple material shifting groups to shift the raw materials in the corresponding feed hopper through a synchronous drive mechanism, so that the raw materials fall evenly for spiral feeding, thereby realizing the function of integrated driving of the rotating shaft and multiple material shifting groups. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention.

[0023] Figure 2 It is a partial three-dimensional structural schematic diagram of the spiral quantitative feeding mechanism of the present invention.

[0024] Figure 3 yes Figure 1 Main sectional view.

[0025] Figure 4 yes Figure 3 A local enlarged schematic diagram of point A.

[0026] Figure 5 yes Figure 3 A partial enlarged schematic diagram of point B.

[0027] Figure 6 It is a top sectional view of the present invention when the push and hold group and the downward driving group fix the conveying cylinder.

[0028] Figure 7 It is a partial top sectional view of the synchronous drive mechanism of the present invention.

[0029] Reference numerals: 1, pre-mixing barrel; 2, rotating shaft; 3, pre-mixing conveyor; 30, vortex blade; 31, stirring rod; 4, spiral feeding mechanism; 40, inclined cylinder; 41, spiral feeding blade; 5, support base; 6, integrated locking mechanism; 60, pushing and pressing group; 601, pushing rod; 602, fixed cylinder; 605, guide rod; 603, first return spring; 604, pressing ring; 61, downward pressing drive group; 610, lifting disc; 611, connecting column; 612, pressing head; 613, C-shaped frame; 614, wedge block; 64, conical ring; 62, fixed clamping ring; 63, conical sealing ring; 7, spiral quantitative feeding mechanism; 70, feed hopper; 71, conveying cylinder; 72, spiral conveying blade; 73, feeding group; 730, rotating ring; 731, feeding part; 732, arc groove; 733, arc rack; 740, M-shaped frame; 741, pushing rod; 8, supporting group; 80, arc support seat; 81, open support ring; 9, synchronous drive mechanism; 90, support cylinder; 91, reciprocating moving rod; 92, second return spring; 93, moving rack; 94, drive group; 940, rotating disc; 941, arc convex block. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] Refer to Figure 1 And Figure 3 , a spiral feeder for the preparation of paracetamol, comprising: a pre-mixing barrel 1, the lower end of the pre-mixing barrel 1 is in a funnel structure and a rotating shaft 2 is rotatably connected therein, a pre-mixing conveyor 3 is arranged on the rotating shaft 2, a spiral feeding mechanism 4 is installed at the lower end of the pre-mixing barrel 1, and the spiral feeding mechanism 4 is used for obliquely conveying the pre-mixed raw materials to the reaction kettle. The spiral feeding mechanism 4 includes an inclined cylinder 40 fixedly installed at the lower end of the pre-mixing barrel 1 and communicated with the pre-mixing barrel 1. A spiral feeding blade 41 is rotatably connected in the inclined cylinder 40. An outlet is arranged on the lower side wall of the upper end of the inclined cylinder 40. The outlet of the inclined cylinder 40 is used to be connected with the inlet of the reaction kettle to convey raw materials into the reaction kettle. Installation holes are opened on the outer wall of the pre-mixing barrel 1 near its upper end and are uniformly arranged along its circumferential direction. The installation holes are in a conical structure.

[0033] Refer to Figure 1The spiral feeding mechanism 4 and the premixing barrel 1 are both fixed on a support base 5, and a roller (not shown in the figure) for driving the entire device to move is installed at the bottom of the support base 5.

[0034] See also Figure 3 The premixing conveying member 3 includes a plurality of stirring rods 31 fixedly mounted on the rotating shaft 2 and a vortex blade 30 fixedly sleeved on the rotating shaft 2 . The diameter of the vortex blade 30 gradually decreases downward, and the vortex blade 30 is located below the stirring rod 31 .

[0035] During the rotation process, the rotating shaft 2 drives the stirring rod 31 to mix and stir the raw materials. At the same time, the vortex blade 30 drives the raw materials to be gradually transported downward into the inclined cylinder 40, thereby realizing the integration of raw material pre-mixing, stirring and transportation. When the motor on the spiral feeding mechanism 4 drives the spiral feeding blade 41 to rotate, the spiral feeding blade 41 transports the pre-mixed raw materials to the reactor.

[0036] See also Figure 1 and Figure 3 An integrated locking mechanism 6 is installed in the premixing barrel 1, and a spiral quantitative feeding mechanism 7 is detachably installed on the mounting hole. The integrated locking mechanism 6 is used to lock multiple spiral quantitative feeding mechanisms 7 on the premixing barrel 1 at the same time. The outer wall of the premixing barrel 1 is also installed with a supporting group 8 for supporting the spiral quantitative feeding mechanism 7.

[0037] A plurality of spiral quantitative feeding mechanisms 7 are locked and installed with the premixing barrel 1 through an integrated locking mechanism 6, which greatly improves the installation stability between the plurality of spiral quantitative feeding mechanisms 7 and the premixing barrel 1, reduces the assembly time between the spiral quantitative feeding mechanisms 7 and the premixing barrel 1, improves the convenience of installation and disassembly of the spiral quantitative feeding mechanisms 7, and facilitates the maintenance of the spiral quantitative feeding mechanisms 7.

[0038] See also Figure 1 and Figure 2 The spiral quantitative feeding mechanism 7 includes a feed hopper 70, a conveying cylinder 71 is fixedly installed at the discharge port of the feed hopper 70, a spiral conveying blade 72 is rotatably connected inside the conveying cylinder 71, the lower end of the feed hopper 70 is a conical structure and is equipped with a material shifting group 73, the material shifting group 73 is used to shift the raw materials in the feed hopper 70; the pre-mixing barrel 1 and the rotating shaft 2 are jointly equipped with a synchronous driving mechanism 9 for driving multiple material shifting groups 73 when the rotating shaft 2 rotates.

[0039] A variety of raw materials for preparing acetaminophen are respectively put into the corresponding feed hopper 70 of the spiral quantitative feeding mechanism 7, and the raw materials fall into the conveying cylinder 71 from the feed hopper 70. Then, the driving motor 1 for driving the spiral conveying blade 72 to rotate and the driving motor 2 for driving the rotating shaft 2 to rotate are started. The driving motor 1 drives the spiral conveying blade 72 to rotate, so that the spiral conveying blade 72 conveys the raw materials into the premixing barrel 1. The rotation speed of the spiral conveying blade 72 in each spiral quantitative feeding mechanism 7 is different. The rotation speed is determined according to the delivery ratio of the conveyed raw materials. Multiple spiral quantitative feeding mechanisms 7 are started and stopped at the same time, so as to achieve proportional delivery.

[0040] When the raw materials enter the premixing barrel 1, the rotating shaft 2 stirs and mixes the various raw materials through the premixing conveying member 3, thereby improving the mixing efficiency when the raw materials enter the reactor for mixing.

[0041] And during the rotation of the rotating shaft 2, the synchronous driving mechanism 9 is also driven to drive multiple material shifting groups 73. The material shifting groups 73 stir the raw materials in the feed hopper 70, thereby avoiding the accumulation of raw material powder in the feed hopper 70, and making it difficult for the raw material powder to enter the conveying cylinder 71 and fully fill the space between the conveying cylinder 71 and the spiral conveying blade 72, resulting in the problem of inaccurate raw material quantity delivered by the spiral quantitative feeding mechanism 7.

[0042] See also Figure 2 and Figure 5 The material shifting group 73 includes an annular groove opened in the feed hopper 70, and a rotating ring 730 is rotatably connected in the annular groove. A material blocking ring is installed in the feed hopper 70 and is located above the rotating ring 730. The inner ring surface of the material blocking ring is a cone with a diameter gradually decreasing downward to prevent the raw material from entering the gap between the rotating ring 730 and the annular groove. A material shifting piece 731 is installed on the inner ring surface of the rotating ring 730. The side wall of the feed hopper 70 is opened with an arc groove 732 connected to the annular groove, and an arc rack 733 is installed on the rotating ring 730 through a connecting rod that slides through the arc groove 732.

[0043] See also Figure 2 and Figure 5 The material shifting member 731 includes a rice-shaped frame 740 installed on the inner surface of the rotating ring 730, and the lower end surface of each horizontal section of the rice-shaped frame 740 is installed with shifting rods 741 that are evenly arranged and inclined along the length direction of the horizontal section.

[0044] During the rotation process, the rotating shaft 2 drives the arc-shaped rack 733 to swing back and forth in a circle along the feed hopper 70 through the synchronous drive mechanism 9. During the reciprocating movement, the arc-shaped rack 733 drives the rotating ring 730 to rotate back and forth at a certain angle. The rotating ring 730 drives the lever 741 to rotate through the rice-shaped frame 740, so that the lever 741 moves the raw material in the feed hopper 70, thereby avoiding the accumulation of raw material powder in the feed hopper 70.

[0045] See also Figure 1 The support group 8 includes an arc-shaped support seat 80 and an open support ring 81 which are evenly arranged along the circumference of the outer wall of the premixing barrel 1 and are installed through a bracket. The open support ring 81 is located above the arc-shaped support seat 80 and its opening is facing the side away from the premixing barrel 1. The open support ring 81 is used to support the conical outer wall of the feed hopper 70, thereby improving the installation stability of the spiral quantitative feeding mechanism 7.

[0046] See also Figure 3 , Figure 4 and Figure 6 The integrated locking mechanism 6 includes a push and hold group 60 installed in the premixing barrel 1 and arranged evenly along its circumference. A downward driving group 61 for driving multiple push and hold groups 60 is installed in the premixing barrel 1. A conical ring 64 and a fixed clamping ring 62 are fixedly sleeved on the side of the outer wall of the conveying cylinder 71 away from the feed hopper 70. The fixed clamping ring 62 is located on the side of the conical ring 64 away from the feed hopper 70. A conical sealing ring 63 is fixedly sleeved on the outer ring surface of the conical ring 64. The push and hold group 60 is used to push the fixed clamping ring 62 to move toward the rotating shaft 2 after the fixed clamping ring 62 enters the premixing barrel 1.

[0047] When installing the spiral quantitative feeding mechanism 7, the spiral quantitative feeding mechanism 7 is placed on the corresponding supporting group 8, and then the conveying cylinder 71 is inserted into the corresponding mounting hole, and at the same time, the fixed clamping ring 62 enters the premixing barrel 1 until the conical sealing ring 63 on the conical ring 64 is tightly pressed against the mounting hole, and then the downward pressing driving group 61 is started to drive the pushing and pressing group 60 to squeeze the fixed clamping ring 62 to move toward the axial direction of the rotating shaft 2, so that the conical sealing ring 63 on the conical ring 64 is tightly pressed against the mounting hole, which not only makes the multiple spiral quantitative feeding mechanisms 7 and the premixing barrel 1 integrated and locked, but also improves the stability of the connection between the multiple spiral quantitative feeding mechanisms 7 and the premixing barrel 1.

[0048] See also Figure 3 , Figure 4 and Figure 6 The pushing and pressing group 60 includes a plurality of push rods 601 rotatably connected to the inner wall of the premixing barrel 1 through a bracket, and the plurality of push rods 601 are evenly arranged along the circumference of the corresponding mounting holes. The inner wall of the premixing barrel 1 is installed with two fixed cylinders 602 symmetrically arranged along the circumference of the mounting holes, and a guide rod 605 is slidably connected to the fixed cylinder 602. A return spring 603 is installed between the guide rod 605 and the fixed cylinder 602. A pressure ring 604 is commonly installed at one end of the two guide rods 605 away from the return spring 603, and the pressure ring 604 is slidably connected to the side of the push rod 601 away from the inner wall of the premixing barrel 1.

[0049] See also Figure 3 , Figure 4 and Figure 6, the downward pressing drive group 61 includes a lifting disc 610 that is sleeved on the rotating shaft 2 and slides up and down. The lower end surface of the lifting disc 610 is installed with pressing heads 612 that are evenly arranged along its circumference through connecting columns 611. On the side of the pressing ring 604 away from the inner wall of the pre-mixing barrel 1, a U-shaped frame 613 is installed. In the middle of the vertical section of the U-shaped frame 613, a wedge-shaped block 614 is installed. The pressing head 612 is triangular and a ball that cooperates with the wedge-shaped block 614 is installed on the inclined surface. When the pressing head 612 moves downward, it rolls into contact with the wedge-shaped block 614 through the ball and pushes the wedge-shaped block 614.

[0050] The first return spring 603 is in a stretched state in its natural state. An electric slider (not shown in the figure) for driving its up and down movement is connected to the lifting disc 610. After multiple conveying cylinders 71 are inserted into the corresponding installation holes, the electric slider drives the lifting disc 610 to move downward. The lifting disc 610 drives the connecting column 611 and the pressing head 612 to move downward. When the pressing head 612 moves downward, it rolls into contact with the wedge-shaped block 614 through the ball and pushes the wedge-shaped block 614 to drive the pressing ring 604 to move towards the inner side wall of the pre-mixing barrel 1. When the pressing ring 604 moves, it pushes the end of the abutting rod 601 away from the conveying cylinder 71, causing the end of the abutting rod 601 close to the conveying cylinder 71 to rotate and push the fixed clamping ring 62 towards the axis direction of the rotating shaft 2, so that the fixed clamping ring 62 drives the conveying cylinder 71 to move until the conical sealing ring 63 on the conical ring 64 tightly abuts against the installation hole, thereby realizing the integrated connection and locking of multiple screw quantitative feeding mechanisms 7 and the pre-mixing barrel 1.

[0051] Refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 7 , the synchronous drive mechanism 9 includes support cylinders 90 that are installed on the outer wall of the pre-mixing barrel 1 and are evenly arranged along its circumference. A reciprocating rod 91 is slidably connected to the support cylinder 90 and the side wall of the pre-mixing barrel 1. A second return spring 92 is installed between the reciprocating rod 91 and the support cylinder 90. One end of the reciprocating rod 91 slidably penetrates into the pre-mixing barrel 1. A moving rack 93 that meshes and drives with the arc-shaped rack 733 is installed at the other end of the reciprocating rod 91. A drive group 94 for driving multiple reciprocating rods 91 is installed on the rotating shaft 2. The reciprocating rod 91 and the connecting column 611 are arranged alternately.

[0052] Refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 7The driving group 94 includes a rotating disk 940 fixedly mounted on the rotating shaft 2, and the side wall of the rotating disk 940 is equipped with arc-shaped protrusions 941 evenly arranged along its circumference. The arc-shaped protrusions 941 are located in the circumference formed by multiple connecting columns 611 arranged circumferentially to prevent the arc-shaped protrusions 941 from colliding with the connecting columns 611 when the rotating disk 940 drives the arc-shaped protrusions 941 to rotate. One end of the reciprocating rod 91 located in the premixing barrel 1 is rollingly connected with a ball.

[0053] The rotating shaft 2 drives the rotating disk 940 to rotate during the rotation process. When the arc-shaped protrusion 941 on the rotating disk 940 contacts the reciprocating rod 91, the arc-shaped protrusion 941 squeezes the reciprocating rod 91 to move, and the reciprocating rod 91 squeezes the return spring 2 92 to contract and drive the moving rack 93 to move. When the moving rack 93 moves, it drives the arc-shaped rack 733 and the rotating ring 730 to rotate through the meshing transmission between it and the arc-shaped rack 733. The rotating ring 730 drives the dial The material piece 731 moves the raw materials in the feed hopper 70; when the arc-shaped protrusion 941 is disengaged from the reciprocating rod 91, the reciprocating rod 91 drives the moving rack 93 to move toward the axis of the premixing barrel 1 under the elastic restoring action of the reset spring 2 92, and the moving rack 93 engages with the arc-shaped rack 733 to drive the rotating ring 730 to reverse, thereby driving multiple rotating rings 730 to drive the material moving piece 731 to reciprocate the raw materials in the feed hopper 70 during the rotation of the rotating shaft 2.

[0054] See also Figure 1-Figure 7 During operation, a variety of raw materials for preparing acetaminophen are respectively put into the corresponding feed hopper 70 of the spiral quantitative feeding mechanism 7, and the raw materials fall into the conveying cylinder 71 from the feed hopper 70. Then, the driving motor 1 for driving the spiral conveying blade 72 to rotate and the driving motor 2 for driving the rotating shaft 2 to rotate are started. The driving motor 1 drives the spiral conveying blade 72 to rotate, so that the spiral conveying blade 72 conveys the raw materials into the premixing barrel 1. The speed of the spiral conveying blade 72 in each spiral quantitative feeding mechanism 7 is different. The speed is determined according to the delivery ratio of the conveyed raw materials. Multiple spiral quantitative feeding mechanisms 7 are started and stopped at the same time, thereby realizing proportional delivery.

[0055] When the raw materials enter the premixing barrel 1, the rotating shaft 2 stirs and mixes the various raw materials through the premixing conveying member 3, thereby improving the efficiency of the raw materials entering the reactor for mixing.

[0056] During the rotation of the rotating shaft 2 , the synchronous driving mechanism 9 is also driven to drive the plurality of material shifting groups 73 . The material shifting groups 73 turn over the raw materials in the feed hopper 70 , thereby preventing the raw material powder in the feed hopper 70 from accumulating.

[0057] Afterwards, the rotating shaft 2 drives the raw materials through the vortex blades 30 to gradually transport them downward into the inclined cylinder 40, thereby realizing the integration of raw material premixing, stirring and transportation. When the motor on the spiral feeding mechanism 4 drives the spiral feeding blades 41 to rotate, the spiral feeding blades 41 transport the premixed raw materials to the reactor.

[0058] In the description of the present invention, it is necessary to understand that the terms "length", "width", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0059] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A screw feeder for preparing acetaminophen, characterized in that: Including: A premixing barrel and multiple screw metering and feeding mechanisms. The lower end of the premixing barrel is in a funnel structure and a rotating shaft is rotatably connected therein. A premixing conveying member is arranged on the rotating shaft. A screw feeding mechanism is installed at the lower end of the premixing barrel. Installation holes are formed in the outer wall of the premixing barrel near its upper end and are evenly arranged along its circumferential direction. The installation holes are in a conical structure. An integrated locking mechanism is installed in the premixing barrel. The integrated locking mechanism is used to lock multiple screw metering and feeding mechanisms on the installation holes of the premixing barrel simultaneously. A supporting group for supporting the screw metering and feeding mechanisms is also installed on the outer wall of the premixing barrel. The screw metering and feeding mechanism includes a feed hopper. A conveying cylinder is fixedly installed at the discharge port of the feed hopper. A screw conveyor blade is rotatably connected in the conveying cylinder. A material distributing group is installed in the feed hopper. A synchronous driving mechanism for driving multiple material distributing groups is jointly installed on the premixing barrel and the rotating shaft. The integrated locking mechanism includes a pushing and pressing group evenly arranged along the circumferential direction of the premixing barrel. A downward pressing driving group for driving multiple pushing and pressing groups is installed in the premixing barrel. A conical ring and a fixed clamping ring are fixedly sleeved on the outer wall of the conveying cylinder on the side far from the feed hopper. The fixed clamping ring is located on the side of the conical ring far from the feed hopper. The pushing and pressing group is used to push the fixed clamping ring towards the rotating shaft.

2. A screw feeder for preparing acetaminophen according to claim 1, characterized in that: The pushing and pressing group includes multiple pushing rods rotatably connected to the inner wall of the premixing barrel through brackets. The multiple pushing rods are evenly arranged along the circumferential direction corresponding to the installation holes. Two fixed cylinders symmetrically arranged along the circumferential direction of the installation holes are installed on the inner wall of the premixing barrel. A guide rod is slidably connected to the fixed cylinder. A first return spring is installed between the guide rod and the fixed cylinder. The two guide rods are jointly installed with a pressing ring at the ends far from the first return spring. The pressing ring is slidably connected to the side of the pushing rod far from the premixing barrel.

3. A screw feeder for preparing acetaminophen according to claim 1, characterized in that: The supporting group includes arc-shaped brackets and open-ended support rings evenly arranged along the circumferential direction of the outer wall of the premixing barrel through brackets. The open-ended support ring is located above the arc-shaped bracket and the opening faces away from the premixing barrel. The open-ended support ring is used to support the conical outer wall of the feed hopper.

4. A screw feeder for preparing acetaminophen according to claim 2, characterized in that: The downward pressing driving group includes a lifting disc slidably sleeved on the rotating shaft up and down. A pressing head evenly arranged along the circumferential direction is installed on the lower end face of the lifting disc through a connecting column. A C-shaped frame is installed on the side of the pressing ring far from the inner wall of the premixing barrel. A wedge block is installed in the middle of the vertical section of the C-shaped frame. The pressing head is triangular and a ball cooperating with the wedge block is installed on the inclined surface. When the pressing head moves downward, it rolls into contact with the wedge block through the ball and pushes the wedge block.

5. A screw feeder for preparing acetaminophen according to claim 4, characterized in that: The material distributing group includes an annular groove formed in the feed hopper. A rotating ring is rotatably connected in the annular groove. A material distributing member is installed on the inner ring surface of the rotating ring. An arc-shaped groove communicating with the annular groove is formed in the side wall of the feed hopper. An arc-shaped rack is installed on the rotating ring through a connecting rod slidably penetrating through the arc-shaped groove.

6. A screw feeder for preparing acetaminophen according to claim 5, characterized in that: The synchronous driving mechanism includes a supporting cylinder installed on the outer wall of the premixing barrel and arranged evenly along the circumference thereof, a reciprocating rod is slidably connected to the supporting cylinder and the side wall of the premixing barrel, two return springs are installed between the reciprocating rod and the supporting cylinder, one end of the reciprocating rod slides into the premixing barrel, a moving rack meshing with an arc-shaped rack is installed on the other end of the reciprocating rod, a driving group for driving multiple reciprocating rods is installed on the rotating shaft, and the reciprocating rods and the connecting columns are arranged in an alternating manner.

7. A screw feeder for preparing acetaminophen according to claim 5, characterized in that: The material shifting member comprises a rice-shaped frame installed on the inner ring surface of a rotating ring, and the lower end surface of each horizontal section of the rice-shaped frame is equipped with shifting rods which are evenly arranged and inclined along the length direction of the horizontal section.

8. A screw feeder for preparing acetaminophen according to claim 6, characterized in that: The driving group includes a rotating disk fixedly sleeved on a rotating shaft, the side wall of the rotating disk is installed with arc-shaped protrusions evenly arranged along its circumference, the arc-shaped protrusions are located in a circle formed by a plurality of circumferentially arranged connecting columns, and one end of the reciprocating rod located in the premixing barrel is rollingly connected with a ball.

9. A screw feeder for preparing acetaminophen according to claim 1, characterized in that: The premixing conveying member comprises a plurality of stirring rods fixedly mounted on a rotating shaft and swirl blades fixedly sleeved on the rotating shaft, wherein the diameter of the swirl blades gradually decreases downwards and the swirl blades are located below the stirring rods.

10. The screw feeder for preparing acetaminophen according to claim 5, characterized in that: A material blocking ring located above the rotating ring is installed in the feed hopper, and the inner ring surface of the material blocking ring is in a cone shape with a diameter gradually decreasing downwards.

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