Non-porous coating machine with negative pressure guarantee structure

Abstract

A non-porous coating machine with a negative pressure guarantee structure comprises a main machine, a rear opening is formed in one side of the main machine, visible glass for sealing the rear opening is arranged in the rear opening, and a rear cover connected with the visible glass and used for limiting the final assembly position of the visible glass in the rear opening is arranged on the main machine. A guide pipe is arranged in the middle of the rear cover, an air passing hose connected with the main machine at the same time is arranged in the guide pipe, the air inlet end of the air passing hose is communicated with the interior of the main machine, a spray head arranged in the guide pipe is arranged at the air outlet end, and an air outlet of the spray head faces away from the rear cover. The coating machine has the beneficial effects that hot air in the main machine is discharged by utilizing the air passing hose, so that the coating machine can be in a micro negative pressure state, the negative pressure in the coating machine is stabilized, the coating uniformity can be ensured when fine particles are processed, and the coating efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of pharmaceutical equipment technology, and in particular to a non-porous coating machine with a negative pressure guarantee structure. Background Technology

[0002] A coating machine is a highly efficient, energy-saving, safe, and clean mechatronic device capable of applying organic film coating, water-soluble film coating, and sustained-release or controlled-release coating to tablets, pills, candies, and other pharmaceutical products. Coating machines are suitable for the pharmaceutical, chemical, and food industries.

[0003] Currently, the film coating spray gun used in non-porous coating machines continuously blows gas into the pan. Without hot exhaust, the pan is under positive pressure. Since the front door of the main unit uses a mechanical seal, fine particles accumulate at the front door entrance, affecting the uniformity of coating. Utility Model Content

[0004] This invention aims to overcome the shortcomings of the prior art by providing a non-porous coating machine with a negative pressure guarantee structure.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: This non-porous coating machine with a negative pressure guarantee structure includes a main unit, a rear opening on one side of the main unit, a viewing glass that closes the rear opening, a rear cover connected to the viewing glass and used to limit the final assembly position of the viewing glass in the rear opening, a guide tube at the center of the rear cover, an air duct connected to the main unit inside the guide tube, an air inlet end of the air duct communicating with the inside of the main unit, and a nozzle placed inside the guide tube at the air outlet end, with the air outlet of the nozzle facing away from the rear cover.

[0006] Further improvements include a connecting sleeve and a main unit connection plate symmetrically distributed on both sides of the connecting sleeve. The inner cavity of the connecting sleeve is fitted with a guide tube extending to the outside of the main unit and a filter held inside the main unit. Two connectors distributed on both sides are fitted on the outer circumference of the connecting sleeve. One connector is used to connect to the viewing glass and the other connector is used to connect to the main unit connection plate. The main unit connection plate is also connected to the main unit.

[0007] Further improvements include a bent configuration at the end of the main unit connection board that connects to the main unit.

[0008] Further improvements include a left assembly block and a right assembly block, with an installation gap formed between the left and right assembly blocks for housing the main unit connection plate or viewing glass.

[0009] Further improvements include inserting one end of the viewing glass into the installation gap and inserting a block at the other end. The block is also fitted with an abutment block connecting plate that is positioned opposite to the viewing glass. The abutment block connecting plate is equipped with an abutment block that abuts against the opening wall formed by the main unit after molding.

[0010] Further improvements include the addition of a sealing strip between the host connection board and the host, which abuts against the abutment block.

[0011] Further improvements include the installation of an explosion-proof visual light on one of the main unit connection boards.

[0012] The beneficial effects of this utility model are:

[0013] This invention utilizes a flexible air duct to exhaust hot air from the main unit, allowing the coating machine to operate under a slight negative pressure. This stabilizes the negative pressure within the coating machine, ensuring uniform coating and improving coating efficiency when processing fine particles. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This utility model Figure 1 A magnified view of part A in the middle;

[0016] Figure 3 This utility model Figure 1 A magnified view of part B in the diagram.

[0017] Explanation of reference numerals in the attached drawings: Main unit 1, Rear opening 11, Visible glass 2, Rear cover 3, Connecting sleeve 31, Main unit connecting plate 32, Guide tube 4, Air hose 5, Nozzle 51, Filter 6, Connector 7, Left assembly block 71, Right assembly block 72, Installation gap 73, Insert block 8, Abutment block connecting plate 9, Abutment block 91, Sealing strip 10, Explosion-proof sight light 20. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings:

[0019] Referring to the attached diagram: This non-porous coating machine with a negative pressure guarantee structure includes a main unit 1. The main unit 1 has a rear opening 11 on one side. A viewing glass 2 that closes the rear opening 11 is provided inside the rear opening 11. A rear cover 3 is provided on the main unit 1, which is connected to the viewing glass 2 and is used to limit the final assembly position of the viewing glass 2 in the rear opening 11. A guide tube 4 is provided at the center of the rear cover 3. An air duct 5 that is connected to the main unit 1 is provided inside the guide tube 4. The air inlet end of the air duct 5 is connected to the interior of the main unit 1, and a nozzle 51 placed inside the guide tube 4 is provided at the air outlet end. The air outlet of the nozzle 51 faces away from the rear cover 3. The principle of this invention is that by setting an air duct 5 on the main unit 1, the hot air inside the main unit 1 is exhausted through the air duct 5, so that the coating machine can be in a slightly negative pressure state, thereby stabilizing the negative pressure inside the coating machine. The air duct 5 is not connected to any device that can actively extract air. It communicates with the inside of the main unit 1 so that the air inside the main unit 1 (the hot air blown into the coating machine) enters into the air duct 5. The air flow is used to make the air reach the nozzle 51, and then the nozzle 51 (the nozzle can adjust the air output) sends the air into the guide tube 4, and then exhausts it to the outside through the guide tube 4. In this way, when processing fine particles, the coating uniformity can be ensured and the coating efficiency can be improved.

[0020] The back cover 3 includes a connecting sleeve 31 and a host connecting plate 32 symmetrically distributed on both sides of the connecting sleeve 31. The inner cavity of the connecting sleeve 31 is respectively fitted with a guide tube 4 extending to the outside of the host 1 and a filter 6 held inside the host 1. Two connectors 7 distributed on both sides are fitted on the outer circumference of the connecting sleeve 31. One connector 7 is used to connect the viewing glass 2, and the other connector 7 is used to connect the host connecting plate 32. The host connecting plate 32 is also connected to the host 1. This arrangement allows the back cover 3 to be used to house the guide tube 4, the filter 6, and the viewing glass 2, and also to be connected to the host 1. That is, after the back cover 3 is connected to the host 1, the viewing glass 2 can also be placed at the rear opening 11 to seal the rear opening 11. The filter 6 is used to filter the dust generated during the coating process.

[0021] The end of the host connection board 32 that is connected to the host 1 is bent. This arrangement allows the host connection board 32 to create a space that allows the viewing glass 2 to be placed inside after it is connected to the host 1, and the connection end is L-shaped after bending.

[0022] The connector 7 includes a left assembly block 71 and a right assembly block 72. An installation gap 73 is formed between the left assembly block 71 and the right assembly block 72 for the host connection plate 32 or the viewing glass 2 to be placed inside. The left assembly block 71 and the right assembly block 72 are connected by bolts, and the bolts are also used to connect the connector 7 to the viewing glass 2 or the host connection plate 32, thereby ensuring the connection stability between the connector 7 and the viewing glass 2 or the host connection plate 32.

[0023] One end of the viewing glass 2 is inserted into the installation gap 73, and the other end is fitted with a plug 8. A connecting plate 9, which is opposite to the viewing glass 2, is also inserted into the plug 8. A plug 91 is provided on the connecting plate 9. The plug 91 abuts against the opening wall formed by the rear opening 11 of the main unit 1, so that the viewing glass 2 is combined with the rear opening 11. This arrangement makes the viewing glass 2 have a part that is combined with the opening wall, so that the viewing glass is sealed at the rear opening 11, thereby achieving a sealing effect.

[0024] A sealing strip 10 is provided between the main unit connection plate 32 and the main unit 1. The sealing strip 10 abuts against the abutment block 91, which can increase the sealing performance of the viewing glass 2 and the rear opening 11 when they are joined, so as to avoid leakage.

[0025] One of the main unit connection boards 32 is equipped with an explosion-proof viewing light 20, which is used to provide a light source so that operators can easily observe the processing inside the main unit 1 through the viewing glass 2.

[0026] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. A non-porous coating machine with a negative pressure guarantee structure, comprising a main unit (1), characterized in that: The main unit (1) has a rear opening (11) on one side. A viewing glass (2) that closes the rear opening (11) is provided inside the rear opening (11). A rear cover (3) is provided on the main unit (1) and is connected to the viewing glass (2) to limit the final assembly position of the viewing glass (2) in the rear opening (11). A guide tube (4) is provided at the center of the rear cover (3). An air duct (5) that is connected to the main unit (1) is provided inside the guide tube (4). The air inlet end of the air duct (5) is connected to the interior of the main unit (1), and a nozzle (51) placed inside the guide tube (4) is provided at the air outlet end. The air outlet of the nozzle (51) faces away from the rear cover (3).

2. The non-porous coating machine with a negative pressure guarantee structure according to claim 1, characterized in that: The back cover (3) includes a connecting sleeve (31) and a host connection plate (32) symmetrically distributed on both sides of the connecting sleeve (31). The inner cavity of the connecting sleeve (31) is respectively fitted with the guide tube (4) extending to the outside of the host (1) and the filter (6) held in the host (1). Two connectors (7) distributed on both sides are fitted on the outer peripheral surface of the connecting sleeve (31). One connector (7) is used to connect the viewing glass (2) and the other connector (7) is used to connect the host connection plate (32). The host connection plate (32) is also connected to the host (1).

3. The non-porous coating machine with a negative pressure guarantee structure according to claim 2, characterized in that: The end of the host connection board (32) that is connected to the host (1) has a bent configuration.

4. The non-porous coating machine with a negative pressure guarantee structure according to claim 2, characterized in that: The connector (7) includes a left assembly block (71) and a right assembly block (72), and an installation gap (73) is formed between the left assembly block (71) and the right assembly block (72) for the host connection plate (32) or the viewing glass (2) to be placed therein.

5. The non-porous coating machine with a negative pressure guarantee structure according to claim 4, characterized in that: One end of the viewing glass (2) is inserted into the installation gap (73), and the other end is fitted with a plug (8). The plug (8) is also fitted with an abutment block connecting plate (9) that is opposite to the viewing glass (2). The abutment block connecting plate (9) is provided with an abutment block (91). The abutment block (91) abuts against the opening wall formed by the host (1) in forming the rear opening (11).

6. The non-porous coating machine with a negative pressure guarantee structure according to claim 5, characterized in that: A sealing strip (10) is provided between the host connection plate (32) and the host (1), and the sealing strip (10) abuts against the abutment block (91).

7. The non-porous coating machine with a negative pressure guarantee structure according to claim 2, characterized in that: An explosion-proof sight light (20) is provided on one of the main unit connection boards (32).

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