Solid feeding equipment and control method

Abstract

The present invention discloses a pharmaceutical chemical equipment, which aims to provide a precise feeding equipment. The key points of its technical solution are that it includes a base, a shell, a motor plate, a screw feeder and an eccentric cover plate. The shell is fixedly connected to the base, the eccentric cover plate is fixedly connected to the shell, the motor plate is arranged on the eccentric cover plate, the screw feeder is arranged inside the shell, one end of the screw feeder is connected to the shell, and the other end is connected to the eccentric cover plate. The material is fed through the feeding port provided by the eccentric cover plate, and then the material enters the screw feeder. The screw feeder continuously rotates to feed the material, and the feeding time and the rotation rate of the screw feeder are controlled by internal preset feeding information to precisely control the material feeding. At the same time, the equipment is provided with a gas protection device to provide nitrogen protection during feeding to ensure that the material is not polluted by the air. The gas protection device and the motor work in time-sharing mode to ensure safe use. This product is suitable for precise feeding of pharmaceutical and chemical drugs.

Description

Technical Field

[0001] The present invention relates to the field of pharmaceutical chemical equipment, and more particularly to a device capable of accurately feeding materials. Background Art

[0002] Solid feeding equipment is widely used in food, medicine, chemistry and industry. Especially in the pharmaceutical and chemical industries, catalyst and additive dosing devices are indispensable equipment. Due to the different types of catalysts and different additive amounts, the types and qualities of the products produced vary greatly, so precise quantitative feeding is required. For example, for solid particulate matter, solid feeding equipment outputs solid raw materials in calculated quantities along the path from inlet to outlet. Solid feeders can supply raw materials to downstream systems at a variety of feed rates.

[0003] At present, most solid feeding equipment on the market adopts screw conveying. The amount of raw materials to be added is calculated according to the amount of reaction required, and then transported through the screw conveyor equipment. The material is added during the working process. Ensuring the continuous and high-precision supply of raw materials is a technical problem that needs to be solved urgently. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the object of the present invention is to provide a precise solid feeding device.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a solid feeding device, comprising a base, a shell, a motor plate, a screw feeder and an eccentric cover plate, the shell being fixedly connected to the base, the eccentric cover plate being fixedly connected to the shell, the motor plate being arranged on the eccentric cover plate, the screw feeder being arranged inside the shell, one end of the screw feeder being connected to the shell, and the other end being connected to the eccentric cover plate.

[0006] The present invention is further configured as follows: the shell includes a fixing ring, a fixing column and a connecting wall, the fixing ring and the fixing column are fixedly connected through the connecting wall, the fixing ring is fixedly connected to the eccentric cover plate, an air switch is provided on the fixing column, the air switch is used to input protective gas into the equipment, and a baffle is provided at the bottom end of the fixing column.

[0007] The present invention is further configured as follows: a feed port, a vent and a motor housing are provided on the eccentric cover plate; the motor housing is fixed to the eccentric cover plate by screws; the feed port is configured as a through hole on the eccentric cover plate; a feed pipe is provided at the feed port; the vent is configured as a through hole on the eccentric cover plate; and a ventilation pipe is provided at the vent.

[0008] The present invention is further configured as follows: the motor plate is arranged and installed on the motor housing, the motor plate is fixedly connected to the motor housing by screws, and the motor plate and the motor housing enclose a storage space for carrying the motor.

[0009] The present invention is further configured as follows: the screw feeder includes a rotating central shaft, a screw feeder, a screener and a sealing ring; the screw feeder is welded and mounted on the rotating central shaft; the screener is fixed to the rotating central shaft by screws; the sealing ring is sleeved outside the rotating central shaft; one end of the rotating central shaft is connected to the output end of the motor, and the other end extends to the bottom end of the fixed column.

[0010] The present invention is further configured as follows: the cross-sectional area of ​​the outer wall gradually decreases along the feeding direction; a buckle is provided on the connecting wall; a discharge port is provided on the baffle; and the discharge port is configured as a curved groove.

[0011] The present invention is further configured as follows: the screener is arranged in the direction of the feed port, the other end of the screener is in contact with the inner wall of the shell, the spiral feeder is set to three circles, and the feeding direction is set to the first spiral, the second spiral and the third spiral, the inclination angle of the first spiral is set to 60°, the inclination angle of the second spiral and the third spiral is set to 20°, and the spiral feeder is set to be clockwise.

[0012] The present invention is further configured as follows: the screener is tilted on the rotating central axis, the angle between the screener and the vertical direction is set to 20°, and the deflection direction is set to counterclockwise deflection.

[0013] The present invention is further configured as follows: the interior of the base is hollow to form a receiving space, the fixed column is inserted into the base through the receiving space and fixedly connected to the base, the base is configured as a right truncated cone, and the cross-sectional area of ​​the base gradually increases along the feeding direction.

[0014] The present invention is further provided as follows: a control method applicable to a solid feeding device, comprising the following steps:

[0015] S1, equipment preparation stage, connect power supply and initialize equipment;

[0016] S2, pre-feeding stage, the nitrogen switch at the discharge port is turned on, and protective nitrogen gas is input into the equipment. The program in the equipment obtains the total amount of feeding G and the feeding duration T, calculates the number of feeding cycles N, and obtains the feeding time per cycle T1=T / N;

[0017] S3, feeding stage, the nitrogen switch at the discharge port is closed, the feeding motor is automatically turned on, and the actual time taken for the feeding motor to rotate one circle is recorded as T2. After the feeding motor rotates one circle, N=N-1 is automatically calculated;

[0018] S4, waiting stage, the nitrogen switch at the discharge port is turned on, the feeding motor is automatically turned off, and the waiting time is recorded as T3=T1-T2;

[0019] S5, judgment stage, when N=0, proceed to step S6; when N≠0, repeat step S3;

[0020] S6, equipment maintenance stage, the feeding work is completed, the cleaning pump automatically starts to clean the equipment and perform 5S maintenance.

[0021] By adopting the above technical solution, when feeding is required, solid materials can be fed through the feed port set on the eccentric cover plate. The feed pipe at the feed port is an oblique cylindrical pipe. The ordinary feed pipe is set as a vertical feed port. Compared with the ordinary feed pipe, the oblique cylindrical pipe can ensure that when dumping materials, the materials can flow into the shell through the long pipe along the pipe wall. The lengthened pipe wall is used for the collection and centralized feeding of materials, and at the same time protects the materials to ensure that the materials are not contaminated by the outside world. The inlet and outlet holes set on the eccentric cover plate can ensure that the protective gas nitrogen is filled and discharged when feeding. The eccentric cover plate is fixed to the shell by screws. When the equipment needs to be cleaned, disassembly and installation are simple and convenient. The motor box set on the eccentric cover plate provides a storage position for the motor. There is no need to connect the motor from the outside. The motor shell is detachably connected to the motor plate by screws. The motor shell can ensure that the motor is waterproof and dustproof, thereby extending the service life of the motor.

[0022] The screw feeder is configured with three layers of spiral blades. When the material enters the shell through the feed port, the solid material is preferentially screened by the screener provided on the screw feeder. The far end of the screener contacts the inner wall of the shell and the screener is tilted on the rotating central axis, which can ensure comprehensive screening of the solid material. The solid material after screening slides to the upper surface of the first spiral blade. The screw feeder continues to rotate at a constant speed to ensure a stable feeding rate of the solid material. After being transported by the second and third spiral blades, the solid material enters the storage space, completing the solid feeding work. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a front view of an embodiment of a solid feeding device of the present invention;

[0024] Figure 2 is a cross-sectional view of an embodiment of a solid feeding device of the present invention;

[0025] Figure 3 Schematic diagram of the structure of the eccentric cover;

[0026] Figure 4 It is a structural diagram of the screw feeder;

[0027] Figure 5 A control method for a solid feeding device according to the present invention;

[0028] The reference numerals in the figure are: 1. base; 2. shell; 21. fixing ring; 22. connecting wall; 23. fixing column; 24. air switch; 25. baffle; 26. buckle; 3. motor plate; 4. screw feeder; 41. sealing ring; 42. screen; 43. spiral rotating plate; 44. rotating central axis; 45. first spiral plate; 46. second spiral plate; 47. third spiral plate; 5. eccentric cover plate; 51. feed pipe; 52. ventilation pipe; 53. motor shell. DETAILED DESCRIPTION

[0029] Reference Figures 1 to 5 An embodiment of a solid feeding device of the present invention is further described.

[0030] For ease of explanation, spatial relative terms such as "upper", "lower", "left", and "right" are used in the embodiments to illustrate the relationship between one element or feature shown in the figures and another element or feature. It should be understood that, in addition to the orientation shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "above" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0031] Moreover, relational terms such as “first” and “second” are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any actual relationship or order between these components.

[0032] A solid feeding device includes a base 1, a shell 2, a motor plate 3, a screw feeder 4 and an eccentric cover plate 5. The base 1 is set as a right truncated cone base. The base 1 is concave inward along the middle axis of the top of the table to form a hole, which forms an accommodating space for the fixing column 23 of the shell 2 and provides storage space for materials. The shell 2 is directly plugged into the base 1 and is detachably connected to the base 1. The installation and disassembly are simple and convenient. Six screw holes are provided on the eccentric cover plate 5, and screw holes adapted thereto are provided on the fixing ring 21 of the shell 2. The eccentric cover plate 5 is fixed and seamlessly connected to the fixing ring 21 by screws. The fixed seamless connection can ensure that a closed space is formed inside the shell 2 when the solid material is fed, which is not affected by external pollutants. , while ensuring the accuracy of solid feeding weight, the motor plate 3 is fixedly connected to the eccentric cover plate 5 by screws, and the motor plate 3 and the eccentric cover plate 5 form a rectangular groove to provide protection for the motor arranged therein, and to ensure that the motor is not affected by external moisture and dust when working. One end of the screw feeder 4 is connected to the fixed column 23 provided at the bottom of the shell 2, and the other end is connected to the eccentric cover plate 5. The screw feeder 4 can rotate freely in the shell 2 to provide power for solid feeding. One end connected to the eccentric cover plate 5 is connected to the output end of the motor, and is driven by the motor to achieve uniform rotation. One end connected to the bottom of the shell 2 is in contact with the discharge port to ensure that solid materials can enter the storage space in the base 1.

[0033] The housing 2 includes a fixing ring 21, a fixing column 23 and a connecting wall 22. The fixing ring 21 and the fixing column 23 are integrally connected through the connecting wall 22. The fixing ring 21 is fixedly connected to the eccentric cover plate 5. The cross-sectional area of ​​the fixing ring 21 is adapted to the eccentric cover plate 5. The connecting wall 22 is set in the shape of an upright funnel. The cross-sectional area of ​​the connecting wall 22 gradually decreases in the material feeding direction. The other end of the connecting wall 22 is integrally connected to the fixing column 23. The cross-sectional area of ​​the fixing column 23 is about one-eighth of the cross-sectional area of ​​the fixed disk. Therefore, the connecting wall 22 is set in an oblique downward direction to ensure that the solid material can move downward along the oblique wall to the second spiral plate 46 at the bottom of the screw feeder 4, and then move to the third spiral plate 47 through the screw feeder 4. Until the discharge port, an air switch 24 is provided on the fixed column 23, and the air switch 24 is provided in the middle of the outer wall of the connecting wall 22. A plug is provided on the air switch 24. The plug is used to ensure that the space inside the shell 2 is completely closed. The air switch 24 is used to input or exhaust protective gas into the equipment. A baffle 25 is provided at the bottom end of the fixed column 23, and the baffle 25 is integrally connected to the fixed column 23. An arc-shaped notch is provided on the baffle 25. The center point of the arc-shaped notch coincides with the center point of the bottom plate of the fixed column 23. The arc-shaped notch is used to transport the material to the storage space in the base 1. Two buckles 26 are symmetrically provided on both sides of the connection. The buckle 26 is used to provide a fulcrum for human hand grabbing. The buckle 26 is set as a cube plate with a circular groove.

[0034] The eccentric cover plate 5 is provided with a feed port, an exhaust port and a motor housing 53. A circular hole is provided in the center of the eccentric cover plate 5. The screw feeder 4 passes through the circular hole and is connected to the output end of the motor. A screw feeder 4 fixing sleeve is provided inside the shell 2 around the circular hole. The fixing sleeve is provided as a protective sleeve with a through channel in the center. The fixing sleeve is used to fix the top of the screw feeder 4. When the equipment is installed, the screw fixer is inserted into the fixing sleeve and fixedly connected to it. The eccentric cover plate 5 is provided with a motor housing 53 around the circular hole. The motor housing 53 is fixed to the eccentric cover plate 5 by screws. On the cover plate 5, the motor housing 53 is set as a rectangular trough body. The motor housing 53 is used to provide a housing space for the motor. Setting the motor on the eccentric cover plate 5 can ensure that the solid feeding equipment can be used in any space and location. It is convenient and fast, and there is no need to be restricted by the need to connect wires. The exhaust port is set as an "L"-shaped exhaust port. One end of the exhaust port is vertically upward above the eccentric cover plate 5, and the other end is horizontally downward and tilted inside the shell 2. The inclined setting of the vent can ensure that the protective gas nitrogen quickly fills the entire shell 2, saving solid feeding time.

[0035] The screw feeder 4 includes a rotating central shaft 44, a screw feeder 4, a sifter 42 and a sealing ring 41. The screw feeder 4 is welded and installed on the rotating central shaft 44. The rotating central shaft 44 is inserted into the fixed sleeve in the center of the fixed disk. A sealing ring 41 is provided close to the bottom of the fixed sleeve. The sealing ring 41 is sleeved on the outside of the rotating central shaft 44. The sifter 42 is fixed to the rotating central shaft 44 by screws. The top of the rotating central shaft 44 is connected to the output end of the motor, and the bottom end extends to the bottom end of the fixed column 23. The rotating central shaft 44 is set as a cylindrical rotating shaft. The sifter 42 is set in the upper middle position of the rotating central shaft 44. The sifter 42 is set as a spatial quadrilateral. The dihedral angle of the spatial quadrilateral is 0. It is set to 170°, and intuitive observation shows that there are small angles on the four sides of the screener 42. The inclination angle of the screener 42 in the vertical direction is set to 20°. The screener 42 rotates with the rotating central axis 44 and the screener 42 is folded in space and can ensure that the solid material is screened at the first time when feeding. After screening, the material will be transported to the second spiral sheet 46 along the first spiral sheet 45. Two points on one side of the screener 42 are welded to the rotating central axis 44, and two upper and lower pulleys are provided on the opposite sides. The pulleys are in contact with the inner wall of the shell 2. The pulleys are used to reduce the friction generated by the rotating central axis 44 during rotation, while ensuring that the screening area is maximized. When the equipment is started, the rotating central axis 44 rotates continuously The pulley follows its rotation and slides on the inner wall of the shell 2 to ensure synchronous rotation with it. The first spiral piece 45, the second spiral piece 46 and the third spiral piece 47 are integrally connected and welded to the rotating central axis 44. The first rotating piece is close to the eccentric cover plate 5, and the second rotating piece and the third rotating piece are connected in sequence along the feeding direction. The first spiral piece 45, the second spiral piece 46 and the third spiral piece 47 have the same pitch and are the radius of the rotating central axis 44. The inclination angle of the first spiral piece 45 is set to 60°, the inclination angle of the second spiral piece 46 and the third spiral piece 47 is set to 20°, and the screw feeder 4 is set to a clockwise setting. The tail end of the first rotating piece is in conflict with the bottom end of the outer wall of the shell 2 , ensuring that the material will not leak due to gaps between the machines, the fixed column 23 on the shell 2 is covered on the second rotating piece and the third rotating piece, and the fixed column 23 on the shell 2 and the second rotating piece and the third rotating piece form a closed material transmission space, and the first spiral piece 45 has a large inclination angle, which can ensure that the material quickly reaches the slide of the second rotating piece after passing through the screen. The inclination angle of the second rotating piece is set to 20°. When the material enters the second rotating piece, the material is transmitted and transported at a predetermined rotational angular velocity. After passing through two rotating pieces, the material finally enters the storage space in the base 1. Since the angular velocity of the rotating piece is constant, the feeding weight can be accurately controlled by giving a given rotation time.

[0036] A control method applicable to a solid feeding device comprises the following steps:

[0037] S1, equipment preparation stage, connect power supply and initialize equipment;

[0038] S2, pre-feeding stage, the nitrogen switch at the discharge port is turned on, and protective nitrogen gas is input into the equipment. The program in the equipment obtains the total amount of feeding G and the feeding duration T, calculates the number of feeding cycles N, and obtains the feeding time per cycle T1=T / N;

[0039] S3, feeding stage, the nitrogen switch at the discharge port is closed, the feeding motor is automatically turned on, and the actual time taken for the feeding motor to rotate one circle is recorded as T2. After the feeding motor rotates one circle, N=N-1 is automatically calculated;

[0040] S4, waiting stage, the nitrogen switch at the discharge port is turned on, the feeding motor is automatically turned off, and the waiting time is recorded as T3=T1-T2;

[0041] S5, judgment stage, when N=0, proceed to step S6; when N≠0, repeat step S3;

[0042] S6, equipment maintenance stage, the feeding work is completed, the cleaning pump automatically starts to clean the equipment and perform 5S maintenance.

[0043] In step S1, the equipment preparation stage, check whether the motor is working normally and whether the various components are stably connected. At the same time, the equipment is automatically initialized. The equipment is checked before the work to ensure the safe progress of the work task.

[0044] In step S2, during the pre-feeding stage, the nitrogen switch is turned on, and the housing is filled with protective nitrogen gas through the air inlet. Nitrogen is an inert gas and is used to protect the material from being affected by air and thus reacting. When the protective nitrogen gas is filled, the program in the equipment pre-sets the total feeding amount G and the feeding duration T, and also sets the number of feeding cycles N, so the time for each feeding cycle is T1=T / N.

[0045] In step S3, during the feeding phase, the nitrogen switch is closed, and the material is fed into the shell through the feed port. At this time, since the pitch of the first rotating piece of the screw feeder is much smaller than the radius of the same horizontal plane in the shell, the material will accumulate at the bottom of the first spiral piece, waiting for the screw feeder to rotate. After the motor is turned on, the motor rotates to drive the screw feeder to rotate, and the screener provided on the screw feeder performs the screening work to break the larger solid materials into particles to ensure that the solid feeding is continuous and not blocked. When the screw feeder rotates, the material is transported from the second rotating piece to the third rotating piece and then to the storage space in the base. The equipment automatically records the actual time for the motor to rotate one circle as T2. When the motor rotates one circle, it automatically calculates N=N-1, which means that one cycle of feeding is completed.

[0046] In step S4, during the waiting phase, the motor is turned off and the nitrogen switch is turned on. This time is the waiting time, and the waiting time T3 = T1 - T2 is recorded. The preset feeding duration can be optimized by observing the waiting time.

[0047] In step S5, during the judgment phase, when N=0, the solid feeding task is completed and step S6 is performed; when N≠0, the equipment repeats step S3 and performs the next round of work until N=0.

[0048] In step S6, during the equipment maintenance phase, the feeding work is completed, the cleaning pump automatically starts to clean the equipment and perform 5S maintenance, and waits for the next work task.

[0049] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A solid feeding device, characterized in that: The invention comprises a base (1), a shell (2), a motor plate (3), a screw feeder (4) and an eccentric cover plate (5), wherein the shell (2) is fixedly connected to the base (1), the eccentric cover plate (5) is fixedly connected to the shell (2), the motor plate (3) is arranged on the eccentric cover plate (5), the screw feeder (4) is arranged inside the shell (2), one end of the screw feeder (4) is connected to the shell (2), and the other end is connected to the eccentric cover plate (5); The housing (2) comprises a fixing ring (21), a fixing column (23) and a connecting wall (22); the fixing ring (21) and the fixing column (23) are fixedly connected via the connecting wall (22); the fixing ring (21) is fixedly connected to the eccentric cover plate (5); an air switch (24) is provided on the fixing column (23); the air switch (24) is used to input protective gas into the device; a baffle (25) is provided at the bottom end of the fixing column (23); The eccentric cover plate (5) is provided with a feed port, a vent and a motor housing (53); the motor housing (53) is fixed to the eccentric cover plate (5) by screws; the feed port is provided as a through hole on the eccentric cover plate (5); a feed pipe (51) is provided at the feed port; the vent is provided as a through hole on the eccentric cover plate (5); a vent pipe (52) is provided at the vent; The screw feeder (4) comprises a rotating central shaft (44), a spiral rotating plate (43), a sifter (42) and a sealing ring (41); the screw feeder (4) is welded and mounted on the rotating central shaft (44); the sifter (42) is fixed to the rotating central shaft (44) by screws; the sealing ring (41) is sleeved outside the rotating central shaft (44); one end of the rotating central shaft (44) is connected to the output end of the motor, and the other end extends to the bottom end of the fixed column (23); The sifter (42) is tilted on the rotating center axis (44), the angle between the sifter (42) and the vertical direction is set to 20 degrees and the deflection direction is set to counterclockwise deflection, the sifter (42) is set to a spatial quadrilateral, and the dihedral angle of the spatial quadrilateral is set to 170 degrees; The screen (42) is arranged in the direction of the feed port, and the other end of the screen (42) is in contact with the inner wall of the shell (2). The spiral rotating piece (43) is set to three circles, and is arranged along the feed direction as a first spiral piece (45), a second spiral piece (46) and a third spiral piece (47). The inclination angle of the first spiral piece (45) is set to 60°, and the inclination angles of the second spiral piece (46) and the third spiral piece (47) are set to 20°. The screw feeder (4) is set to be clockwise.

2. A solid feeding device according to claim 1, characterized in that: The motor plate (3) is mounted on the motor housing (53), and the motor plate (3) is fixedly connected to the motor housing (53) by screws. The motor plate (3) and the motor housing (53) form a storage space for carrying the motor.

3. The solid feeding device according to claim 1, characterized in that: The cross-sectional area of ​​the connecting wall gradually decreases along the feeding direction. A buckle (26) is provided on the connecting wall (22). A discharge port is provided on the baffle (25), and the discharge port is configured as a curved groove.

4. The solid feeding device according to claim 1, characterized in that: The interior of the base (1) is hollow to form a receiving space, and the fixed column (23) is inserted into the base (1) through the receiving space and is fixedly connected to the base (1). The base (1) is configured as a right truncated cone, and the cross-sectional area of ​​the base (1) gradually increases along the feeding direction.

5. A control method for a solid feeding device according to any one of claims 1 to 4, characterized in that: The following steps are involved: S1, equipment preparation stage, connect power supply and initialize equipment; S2, pre-feeding stage, the nitrogen switch at the discharge port is turned on, and protective nitrogen gas is input into the equipment. The program in the equipment obtains the total amount of feeding G and the feeding duration T, calculates the number of feeding cycles N, and obtains the feeding time per cycle T1=T / N; S3, feeding stage, the nitrogen switch at the discharge port is closed, the feeding motor is automatically turned on, and the actual time taken for the feeding motor to rotate one circle is recorded as T2. After the feeding motor rotates one circle, N=N-1 is automatically calculated; S4, waiting stage, the nitrogen switch at the discharge port is turned on, the feeding motor is automatically turned off, and the waiting time is recorded as T3=T1-T2; S5, judgment stage, when N=0, proceed to step S6; when N≠0, repeat step S3; S6, equipment maintenance stage, the feeding work is completed, the cleaning pump automatically starts to clean the equipment and perform 5S maintenance.

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