Air volume compensation adjusting device of coating machine

Abstract

An air volume compensation adjusting device of a coating machine comprises a main machine, a hot air cabinet is arranged on one side of the main machine, an exhaust cabinet is arranged on the other side of the main machine, a fresh air inlet pipe is arranged on the side portion of the hot air cabinet, and a hot air-to-main machine air pipe connected with the main machine is arranged at the upper end of the hot air cabinet. One side part of the exhaust cabinet is provided with an exhaust air outlet pipe, the other side part of the exhaust cabinet is provided with an exhaust air-to-exhaust cabinet air pipe connected with the host, and a hot air bypass pipe is arranged between the hot air-to-host air pipe and the exhaust air-to-exhaust cabinet air pipe; part of hot air conveyed to a host from the hot air-to-host air pipe is directly conveyed to the exhaust cabinet air pipe through the hot air bypass air pipe. The utility model has the beneficial effects that the air volume and the negative pressure of the whole system are controlled under the condition that the capacity of equipment is 10-20% and the capacity is small, so that the air inlet is accurately controlled, the negative pressure in the host is kept in a certain state, and the required negative pressure control precision is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of pharmaceutical equipment, in particular to an air volume compensation and adjustment device for a coating machine. Background Art

[0002] The coating machine is a highly efficient, energy-saving, safe and clean mechatronic equipment that can coat tablets, pills, candies, etc. with organic film, water-soluble film, slow-release and controlled-release coatings. The coating machine is suitable for the pharmaceutical, chemical, food and other industries.

[0003] The air volume adjustment and compensation system is developed according to the requirements of the Good Manufacturing Practice (GMP) for the production process, and is used for comprehensive and extensive tablet machine film coating, sustained-release coating, functional coating, etc.

[0004] At present, in the process of small-batch trial production under a single pot, the demand for hot air in the process of small-batch trial production is smaller than the demand for hot air in the large-capacity state. Therefore, the fan can only be kept working in a low-frequency state. However, the fan is not suitable for running at low frequency and high torque for a long time (easy to be damaged), so this method is not very applicable. Utility Model Content

[0005] The utility model aims to solve the above-mentioned shortcomings of the prior art and provides an air volume compensation and adjustment device for a coating machine to solve the above-mentioned problems.

[0006] The utility model adopts a technical solution to solve its technical problems: the air volume compensation and adjustment device of the coating machine comprises a main machine, a hot air cabinet is arranged on one side of the main machine, and an exhaust cabinet is arranged on the other side; a fresh air inlet pipe is arranged on the side of the hot air cabinet, and a hot air to main machine air duct connected with the main machine is arranged on the upper end; an exhaust air outlet pipe is arranged on one side of the exhaust cabinet, and an exhaust to exhaust cabinet air duct connected with the main machine is arranged on the other side; a hot air bypass air duct is arranged between the hot air to main machine air duct and the exhaust to exhaust cabinet air duct, so that part of the hot air transported to the main machine by the hot air to main machine air duct is directly transported to the exhaust to exhaust cabinet air duct through the hot air bypass air duct.

[0007] For further improvement, a host bypass duct is provided between the host and the exhaust duct to the exhaust cabinet.

[0008] For further improvement, a fume hood bypass pipe is provided between the air duct for exhausting air to the fume hood and the fume hood so that the air duct for exhausting air to the fume hood has a second place for exhausting air to the fume hood.

[0009] For further improvement, bypass proportional regulating air valves are provided on the hot air bypass duct, the main engine bypass duct, the exhaust cabinet bypass duct, and the exhaust to exhaust cabinet duct.

[0010] For further improvement, a wind speed sensor is provided on the air duct from the hot air to the main engine.

[0011] For further improvement, a negative pressure sensor is provided on the main unit.

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

[0013] The utility model aims at controlling the air volume and negative pressure of the entire system under small capacity when the equipment is under 10-20% capacity, thereby achieving precise control of air intake, maintaining the negative pressure in the main unit at a certain state, and achieving the required negative pressure control accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Explanation of the reference numerals: host 1, hot air cabinet 2, fresh air inlet duct 21, hot air to host air duct 22, exhaust cabinet 3, exhaust air outlet duct 31, exhaust air to exhaust cabinet air duct 32, hot air bypass air duct 4, host bypass air duct 5, exhaust cabinet bypass duct 6, bypass proportional adjustment air valve 7, wind speed sensor 8, negative pressure sensor 9. DETAILED DESCRIPTION

[0016] The utility model is further described below in conjunction with the accompanying drawings:

[0017] Referring to the accompanying drawings: This coating machine air volume compensation and adjustment device includes a main machine 1, a hot air cabinet 2 is arranged on one side of the main machine 1, and an exhaust cabinet 3 is arranged on the other side. A fresh air inlet duct 21 is arranged on the side of the hot air cabinet 2, and a hot air to main machine air duct 22 connected to the main machine 1 is arranged on the upper end. An exhaust air outlet duct 31 is arranged on one side of the exhaust cabinet 3, and an exhaust to exhaust cabinet air duct 32 connected to the main machine 1 is arranged on the other side. A hot air bypass ventilation duct 4 is arranged between the hot air to main machine air duct 22 and the exhaust to exhaust cabinet air duct 32, so that part of the hot air transported from the hot air to main machine air duct 22 to the main machine 1 is directly transported to the exhaust to exhaust cabinet air duct 32 through the hot air bypass ventilation duct 4. The principle of the utility model is that the hot air cabinet 2 is used to transport hot air into the main unit 1 (the fresh air inlet duct 21 guides the air into the hot air cabinet 2, and then the hot air to the main unit air duct 22 transports the heated hot air into the main unit 1), and the exhaust cabinet 3 discharges the used air to the outside (the exhaust to exhaust cabinet air duct 32 guides the air in the main unit 1 to enter the exhaust cabinet 3, and then the exhaust outlet duct 31 discharges the air to the outside). In order to keep the fan in normal operation and reduce the amount of hot air entering the main unit 1, a hot air bypass duct 4 is provided between the hot air to the main unit air duct 22 and the exhaust to exhaust cabinet air duct 32. Through the hot air bypass duct 4, part of the hot air is directly sent into the exhaust to exhaust cabinet air duct 32, thereby reducing the amount of hot air entering the main unit 1 to meet the production needs of small batches of single pots.

[0018] A host-side ventilation duct 5 is arranged between the host 1 and the exhaust to exhaust cabinet air duct 32. The host-side ventilation duct 5 allows the hot air to have two exhaust points when leaving the host 1, so that the air in the host 1 can be quickly sent into the exhaust to exhaust cabinet air duct 32, and the exhaust ratio matches the intake ratio, which can also increase the drying effect.

[0019] A fume hood bypass pipe 6 is provided between the exhaust duct 32 to the fume hood and the fume hood 3 so that the exhaust duct 32 to the fume hood has a second exhaust to the fume hood 3, which can accelerate the efficiency of the air being delivered into the fume hood 3 to match the air intake ratio.

[0020] The hot air bypass duct 4, the main engine bypass duct 5, the exhaust cabinet bypass duct 6, and the exhaust to the exhaust cabinet duct 32 are all provided with a bypass proportional regulating air valve 7. The bypass proportional regulating air valve 7 is used to adjust the flow and pressure in the pipeline to ensure the normal operation of the system. When it is necessary to increase or decrease the medium flow, it can be achieved through the bypass valve. At the same time, the bypass valve can adjust the pressure in the system to keep the pressure in the pipeline within a constant range.

[0021] A wind speed sensor 8 is provided on the hot air to main engine air duct 22. The wind speed sensor is used to measure the wind speed. The wind speed data obtained by the measurement can be used to know whether the fan is working normally. The bypass proportional adjustment air valve 7 of the hot air bypass air duct 4 can also be controlled to achieve precise control of the air intake. The bypass proportional adjustment air valve 7 and the wind speed sensor are controlled by PLC closed-loop control and parameters are set to achieve the purpose of automatic control.

[0022] A negative pressure sensor 9 is provided on the host 1 to monitor the pressure value in the host 1. The negative pressure of the host is automatically controlled by the fan of the exhaust cabinet 3. When the fan of the hot air cabinet 2 is locked at a certain frequency, the fan of the exhaust cabinet 3 also needs to be set at a certain frequency to protect the fan motor of the exhaust cabinet 3. The negative pressure in the host 1 is fine-tuned by the bypass proportional adjustment air valve 7 on the host bypass air duct 5, so that the negative pressure in the host 1 is maintained at a certain state and the required negative pressure control accuracy is achieved.

[0023] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A device for compensating and adjusting air volume of a coating machine, comprising a main machine (1), characterized in that: A hot air cabinet (2) is provided on one side of the main unit (1), and an exhaust cabinet (3) is provided on the other side; a fresh air inlet duct (21) is provided on the side of the hot air cabinet (2), and a hot air to main unit duct (22) connected to the main unit (1) is provided on the upper end; an exhaust air outlet duct (31) is provided on one side of the exhaust cabinet (3), and an exhaust to exhaust cabinet duct (32) connected to the main unit (1) is provided on the other side; a hot air bypass duct (4) is provided between the hot air to main unit duct (22) and the exhaust to exhaust cabinet duct (32), so that part of the hot air transported from the hot air to main unit duct (22) to the main unit (1) is directly transported into the exhaust to exhaust cabinet duct (32) through the hot air bypass duct (4).

2. The air volume compensation and adjustment device for a coating machine according to claim 1, characterized in that: A main machine bypass air duct (5) is provided between the main machine (1) and the exhaust to fume hood air duct (32).

3. The air volume compensation and adjustment device for a coating machine according to claim 2, characterized in that: An exhaust cabinet bypass pipe (6) is provided between the exhaust-to-exhaust cabinet air duct (32) and the exhaust cabinet (3), so that the exhaust-to-exhaust cabinet air duct (32) has a second exhaust point to the exhaust cabinet (3).

4. The air volume compensation and adjustment device for a coating machine according to claim 3, characterized in that: The hot air bypass air duct (4), the main engine bypass air duct (5), the exhaust cabinet bypass duct (6), and the exhaust-to-exhaust cabinet air duct (32) are all provided with a bypass proportional regulating air valve (7).

5. The air volume compensation and adjustment device for a coating machine according to claim 1, characterized in that: The hot air to main engine air duct (22) is provided with a wind speed sensor (8).

6. The air volume compensation and adjustment device for a coating machine according to claim 1, characterized in that: The host (1) is provided with a negative pressure sensor (9).

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