Feeding device for medical intermediate production

Abstract

The utility model relates to a feeding device for medical intermediate production, which comprises a hopper and an extrusion plug, the center of the top surface of the hopper is connected with a material suction pipe, and the lower end of the hopper is provided with a feeding port, and is technically characterized in that the extrusion plug comprises an upper cylindrical section and a lower conical section connected with the lower end of the upper cylindrical section; a sealing rubber ring tightly connected with the inner wall of the hopper is arranged on the peripheral face of the upper cylindrical section, a longitudinal discharging hole is formed in the center of the extrusion plug, a first flow valve is arranged in the lower end of the longitudinal discharging hole, a telescopic pipe is connected between the outer edge of the upper end of the longitudinal discharging hole and the inner top face of the hopper, and the telescopic pipe communicates with a material suction pipe and the longitudinal discharging hole. An annular air inlet cavity surrounding the longitudinal discharging hole is formed in the extrusion plug, an air hole set communicated with the annular air inlet cavity is formed in the lower surface of the lower cone section, a ventilation net layer is attached to the outer side of the air hole set, and an extrusion mechanism is arranged between the extrusion plug and the hopper. According to the device, the exhaust efficiency is remarkably improved, so that the feeding efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pharmaceutical production equipment, and particularly relates to a feeding device for the production of pharmaceutical intermediates. Background Art

[0002] In the process of drug synthesis, pharmaceutical intermediates are usually used to achieve the purpose of rapid production. The production quality of pharmaceutical intermediates directly affects the quality of the final drugs. When producing pharmaceutical intermediates, chemical raw materials and chemical solvents are usually added to a reaction kettle for stirring, and after the reaction is completed, the reaction products are discharged and separated and purified.

[0003] CN 118416786 A discloses a feeding device for the production of pharmaceutical intermediates, which includes a suction machine main body and a hopper installed on the suction machine main body. The discharge end of the hopper is communicated with a material barrel, the lower end of the material barrel is communicated with a feeding pipe, a quantitative feeding mechanism is arranged inside the feeding pipe, the top end inside the material barrel is installed with a compression ring through a lifting mechanism, and a conical rubber block is installed near the compression ring inside the material barrel through an elastic component. The device is intended to first compress and discharge part of the oxygen mixed in the powdery raw materials of the pharmaceutical intermediates, and then transport the powdery raw materials into the reaction kettle, so as to avoid the influence of the existence of oxygen on the chemical reaction. However, there are still the following problems: the gas is discharged through the filter screen in the exhaust pipe, and the exhaust efficiency is low. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a feeding device for the production of pharmaceutical intermediates with reasonable structure and reliable use to solve the above problems, significantly improve the exhaust efficiency, and thus improve the feeding efficiency.

[0005] The technical solution of the utility model is as follows:

[0006] A feeding device for the production of pharmaceutical intermediates includes a hopper communicated with a suction machine and a pressing plug arranged in the hopper. The center of the top surface of the hopper is connected with a suction pipe, and a feeding port is arranged at the lower end of the hopper. The technical key points are that: the pressing plug includes an upper cylindrical section and a lower conical section connected to the lower end of the upper cylindrical section. A sealing rubber ring closely connected to the inner wall of the hopper is arranged on the outer peripheral surface of the upper cylindrical section. A longitudinal feeding hole is arranged in the center of the pressing plug, and a first flow valve is arranged inside the lower end of the longitudinal feeding hole. A telescopic pipe is connected between the outer edge of the upper end of the longitudinal feeding hole and the inner top surface of the hopper. The telescopic pipe communicates the suction pipe and the longitudinal feeding hole. An annular air inlet cavity surrounding the longitudinal feeding hole is arranged inside the pressing plug. A ventilation hole group communicated with the annular air inlet cavity is arranged on the lower surface of the lower conical section, and a ventilation net layer is attached to the outside of the ventilation hole group. A pressing mechanism is arranged between the pressing plug and the hopper.

[0007] The above-mentioned feeding device for pharmaceutical intermediate production, wherein the extrusion mechanism comprises two longitudinal telescopic cylinders symmetrically arranged at the top of the hopper, and the lower end of the cylinder rod of the longitudinal telescopic cylinder is fixedly connected to the upper surface of the extrusion plug.

[0008] The above-mentioned feeding device for pharmaceutical intermediate production, wherein the telescopic pipe is a corrugated pipe that is wider at the top and narrower at the bottom.

[0009] The above-mentioned feeding device for pharmaceutical intermediate production, wherein a longitudinal exhaust pipe communicating with the annular air inlet cavity is provided on the upper surface of the extrusion plug. The upper end of the longitudinal exhaust pipe passes through the hopper and is connected to an external negative pressure pipeline. A connecting flange is provided at the upper end of the longitudinal exhaust pipe, and a return spring is sleeved between the connecting flange and the top surface of the hopper. A stop valve is fixed at the inner end of the longitudinal exhaust pipe.

[0010] The above-mentioned feeding device for pharmaceutical intermediate production, wherein a vibration motor is fixed at the bottom of the hopper to facilitate feeding.

[0011] The above-mentioned feeding device for pharmaceutical intermediate production, wherein a second flow valve is provided at the lower end of the hopper to facilitate precise feeding.

[0012] The beneficial effects of the present utility model are as follows:

[0013] During use, a set amount of raw materials is sucked into the hopper through the suction pipe, and then the raw materials are extruded by the downward movement of the extrusion plug. The lower conical section of the extrusion plug is inserted into the raw material pile, and the gas in the raw materials enters the annular air inlet cavity through the ventilation mesh layer and the air permeation hole group, and is then discharged by negative pressure assistance. The number of the air permeation hole groups is large, and they are uniformly arranged and converge for discharge. The structural design is unique and ingenious, and at the same time, the exhaust efficiency is significantly improved, thereby improving the feeding efficiency. Description of the Drawings

[0014] Figure 1 is a schematic structural diagram of the present utility model;

[0015] Figure 2 is Figure 1 the top view of

[0016] Figure 3 is Figure 1 the enlarged view of part A in

[0017] In the figure: 1. connecting flange, 2. return spring, 3. hopper, 4. longitudinal exhaust pipe, 5. sealing rubber ring, 6. annular air inlet cavity, 7. vibration motor, 8. feeding port, 9. second flow valve, 10. first flow valve, 11. longitudinal feeding hole, 12. air permeation hole group, 13. extrusion plug, 14. telescopic pipe, 15. longitudinal telescopic cylinder, 16. suction pipe, 17. ventilation mesh layer. Detailed Embodiments

[0018] The present utility model will be described in detail according to the accompanying drawings of the specification.

[0019] As Figures 1 to 3 shown, the feeding device for producing the pharmaceutical intermediate includes a hopper 3 communicated with a suction machine and a pressing plug 13 arranged in the hopper 3. The center of the top surface of the hopper 3 is connected with a suction pipe 16, and a feeding port 8 is arranged at the lower end of the hopper 3.

[0020] Among them, the pressing plug 13 includes an upper cylindrical section and a lower conical section connected to the lower end of the upper cylindrical section. A sealing rubber ring 5 closely contacting the inner wall of the hopper 3 is arranged on the outer peripheral surface of the upper cylindrical section. A longitudinal feeding hole 11 is arranged at the center of the pressing plug 13, and a first flow valve 10 is arranged inside the lower end of the longitudinal feeding hole 11. A telescopic pipe 14 is connected between the outer edge of the upper end of the longitudinal feeding hole 11 and the inner top surface of the hopper 13, and the telescopic pipe 14 communicates the suction pipe 16 and the longitudinal feeding hole 11. In this embodiment, the telescopic pipe 14 is a corrugated pipe with a wider upper part and a narrower lower part.

[0021] An annular air inlet cavity 6 surrounding the longitudinal feeding hole 11 is arranged inside the pressing plug 13. A group of air permeable holes 12 communicated with the annular air inlet cavity 6 is arranged on the lower surface of the lower conical section, and a ventilation net layer 17 is attached to the outside of the group of air permeable holes 12. In this embodiment, a longitudinal exhaust pipe 4 communicated with the annular air inlet cavity 6 is arranged on the upper surface of the pressing plug 13. The upper end of the longitudinal exhaust pipe 4 passes through the hopper 3 and is connected to an external negative pressure pipeline. A connecting flange 1 is arranged at the upper end of the longitudinal exhaust pipe 4. A return spring 2 is sleeved between the connecting flange 1 and the top surface of the hopper 3 for the longitudinal exhaust pipe 4, and a stop valve is fixed at the inner end of the longitudinal exhaust pipe 4.

[0022] A pressing mechanism is arranged between the pressing plug 13 and the hopper 3. In this embodiment, the pressing mechanism includes two longitudinal telescopic cylinders 15 symmetrically arranged at the top of the hopper 3, and the lower end of the cylinder rod of the longitudinal telescopic cylinder 15 is fixedly connected to the upper surface of the pressing plug 13. A vibration motor 7 is fixed at the bottom of the hopper 3 to facilitate feeding. A second flow valve 9 is arranged at the lower end of the hopper 3 to facilitate precise feeding.

[0023] Working principle:

[0024] 1. During use, the suction pipe 16 uses the suction machine to suck raw materials into the hopper 3 through the telescopic pipe 14, the longitudinal feeding hole 11 of the pressing plug, and the first flow valve 10. After reaching the set amount, the first flow valve 10 is closed.

[0025] 2. The cylinder rods of the two longitudinal telescopic cylinders 15 extend downward and push the pressing plug 13 downward. The lower conical section of the pressing plug 13 is squeezed into the raw material pile to achieve the purpose of squeezing the raw materials. The gas therein enters the annular air inlet cavity 6 through the ventilation net layer 17 and the group of air permeable holes 12, and then the gas is discharged by using the negative pressure pipeline. Then the stop valve is closed.

[0026] 3. The two longitudinal telescopic cylinders 15 drive the extrusion plug 13 to move upward, start the vibration motor 7 to gather the raw materials at the lower part of the hopper 3, and open the second flow valve 9 to uniformly discharge the raw materials through the second flow valve 9, achieving the purpose of feeding.

[0027] The above has described the embodiments of the present invention in detail, but the above content is only the preferred embodiment of the present invention and cannot be considered as limiting the implementation scope of the present invention. All equal changes and improvements made within the scope of the creation of the present invention shall still fall within the scope covered by this patent.

Claims

1. A feeding device for the production of pharmaceutical intermediates, comprising a hopper connected to a suction machine, an extrusion plug arranged in the hopper, the center of the top surface of the hopper is connected to a suction pipe, and a feeding port is arranged at the lower end of the hopper, characterized in that: The extrusion plug includes an upper cylindrical section and a lower cone section connected to the lower end of the upper cylindrical section. The outer circumferential surface of the upper cylindrical section is provided with a sealing rubber ring tightly connected to the inner wall of the hopper. A longitudinal discharge hole is provided in the center of the extrusion plug and a first flow valve is built into the lower end of the longitudinal discharge hole. A telescopic tube is connected between the outer edge of the upper end of the longitudinal discharge hole and the top surface of the hopper. The telescopic tube connects the suction pipe and the longitudinal discharge hole. An annular air inlet cavity surrounding the longitudinal discharge hole is provided in the extrusion plug. The lower surface of the lower cone section is provided with an air hole group connected to the annular air inlet cavity. A ventilation mesh layer is attached to the outer side of the air hole group. An extrusion mechanism is provided between the extrusion plug and the hopper.

2. The feeding device for producing pharmaceutical intermediates according to claim 1, characterized in that: The extrusion mechanism comprises two longitudinal telescopic cylinders symmetrically arranged on the top of the hopper, and the lower ends of the cylinder rods of the longitudinal telescopic cylinders are connected and fixed to the upper surface of the extrusion plug.

3. The feeding device for producing pharmaceutical intermediates according to claim 1, characterized in that: The telescopic tube is a corrugated tube which is wider at the top and narrower at the bottom.

4. The feeding device for producing pharmaceutical intermediates according to claim 1, characterized in that: A longitudinal exhaust pipe connected to the annular air inlet cavity is provided on the upper surface of the extrusion plug, the upper end of the longitudinal exhaust pipe passes through the hopper and is connected to the external negative pressure pipeline, a connecting flange is provided on the upper end of the longitudinal exhaust pipe, a reset spring is installed between the connecting flange and the top surface of the hopper, and a stop valve is fixed to the inner end of the longitudinal exhaust pipe.

5. The feeding device for producing pharmaceutical intermediates according to claim 1, characterized in that: A vibration motor is fixed at the bottom of the hopper.

6. The feeding device for producing pharmaceutical intermediates according to claim 1, characterized in that: A second flow valve is provided at the lower end of the hopper.

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