High-precision coating feeding system and feeding method

Abstract

The high-precision coating feeding system comprises a material barrel, a feeding pump and a material lifting control structure, and the height of a feeding connector of the feeding pump serves as a liquid level datum line; a liquid level sensor is inserted into the upper part of the material barrel; the liquid level sensor is electrically connected with the material lifting control structure through the controller; and the material lifting control structure can drive the material barrel to ascend or descend according to a feedback signal of the liquid level sensor, so that the liquid level height in the material barrel is always flush with the liquid level datum line. The height position of the feeding port of the feeding pump is taken as a reference, the material liquid level is always kept flush with the height of the feeding pump port by automatically controlling the material to ascend and descend, manual intervention is not needed any more, and the liquid level height adjustment is more accurate, so that the flow and pressure of the material liquid supplied by the material pump are stable and consistent, and high-precision and high-uniformity coating is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical pharmaceutical machinery, and specifically, to a high-precision coating feeding system and a feeding method. Background Art

[0002] Currently, when pharmaceutical enterprises or chemical enterprises produce products that need to be coated, such as film agents, most of the material supply of the coating equipment uses a feed tank for feeding, and then a feed pump provides power to transport the liquid material into the coating head.

[0003] However, as the material is consumed, the liquid level in the feed tank will gradually drop, and the load of the feed pump will continuously increase, resulting in fluctuations in the flow rate of the liquid material supplied by the feed pump, affecting the stability of the pressure of the coating head, and thus affecting the coating accuracy and coating uniformity. Currently, in order to solve the problem of unstable feeding caused by the drop in the liquid level, a manual lift truck is usually set under the material tank, and by raising the height of the material tank, the height position of the liquid level is adjusted. However, the manual lift truck requires the operator to manually lift it in real time to adjust the liquid level, with a high working intensity. At the same time, there is no reference benchmark for manual lifting, which may lead to insufficient or excessive lifting distance, resulting in frequent fluctuations in the flow rate of the liquid material supplied by the feed pump, further affecting the stability of the pressure of the coating head.

[0004] In view of this, this application is specifically proposed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the manual lift truck requires the operator to manually lift it in real time to adjust the liquid level, with a high working intensity. At the same time, there is no reference benchmark for manual lifting, which may lead to insufficient or excessive lifting distance, resulting in frequent fluctuations in the flow rate of the liquid material supplied by the feed pump. The purpose is to provide a high-precision coating feeding system and a feeding method, with the height position of the feeding interface of the feed pump as the reference benchmark, and by automatically controlling the lifting of the material platform, the material liquid level is always kept flush with the height of the feed pump interface, without the need for personnel intervention, and the liquid level height adjustment is more accurate, so as to achieve stable and consistent flow rate and pressure of the liquid material supplied by the feed pump, and achieve high-precision and high-uniformity coating.

[0006] The present invention is realized through the following technical solutions: In a first aspect, the present invention provides a high-precision coating feeding system, including a material tank, a feed pump, and a material lifting control structure, and the height of the feeding interface of the feed pump is used as the liquid level reference line; A liquid level sensor is inserted above the material tank; The liquid level sensor is electrically connected to the material lifting control structure through a controller; The material lifting control structure can drive the material tank to rise or fall according to the feedback signal of the liquid level sensor, so that the liquid level height in the material tank is always flush with the liquid level reference line.

[0007] Based on the height position of the feeding interface of the feeding pump in the present invention, by automatically controlling the lifting of the material, the liquid level of the material is always kept flush with the height of the feeding pump interface, without the need for manual intervention, and the adjustment of the liquid level height is more accurate, so as to realize the stable consistency of the flow rate and pressure of the liquid supplied by the material pump, and achieve high-precision and high-uniformity coating.

[0008] In a specific embodiment, the material lifting control structure includes a lifting motor and a material platform. The material bucket is placed on the material platform, and the lifting motor can drive the material platform to rise or fall.

[0009] In a specific embodiment, the material lifting control structure further includes a platform mounting frame. One end of the material platform is slidably mounted on the platform mounting frame, and the end of the material platform can move up and down along the platform mounting frame under the drive of the lifting motor.

[0010] In a specific embodiment, the material lifting control structure further includes a lifting fixed pulley installed at the top of the platform mounting frame. A lifting cable is installed on the material platform, and the end of the lifting cable bypasses the lifting fixed pulley and is connected to the lifting motor.

[0011] In a specific embodiment, a limit switch upper and a limit switch lower are installed above the material platform on the platform mounting frame.

[0012] In a specific embodiment, the controller includes an automatic mode and a manual mode. The automatic mode and the manual mode are switched by a rotary switch set on the controller. In the automatic mode, the lifting of the material bucket is automatically controlled by the feedback signal of the liquid level sensor. In the manual mode, the lifting of the material bucket is controlled by a lifting push-button switch in a point-by-point manner.

[0013] In the present invention, the control is divided into manual and automatic modes. The conversion between the manual / automatic modes is completed by the rotary switch of the controller. In the manual mode, the up / down movement is completed by the point-by-point operation of the push-button switch. When it rises to the upper limit switch, it forms a limit position protection to stop the machine. When it descends to the lower limit switch, it forms a limit position protection to stop the machine. In the automatic mode, the rising of the material bucket is controlled by the liquid level sensor. When the liquid level is lower than the liquid level reference line, the sensor gives a rising signal, the lifting motor starts, drives the material platform to rise. When the liquid level rises to the liquid level reference, the sensor gives a stop signal, and the lifting motor shuts down, realizing the automatic leveling control of the material liquid level and the liquid level reference.

[0014] In a specific embodiment, a discharge port is provided at the bottom of the material bucket, and the discharge port is connected to the feeding interface of the feeding pump through a first feeding hose.

[0015] In a specific embodiment, the discharge interface of the feeding pump is connected to the coating head through a second feeding hose.

[0016] In a specific embodiment, the position of the liquid level sensor is fixed relative to the feeding pump.

[0017] Second, the present invention provides a feeding method based on the high-precision coating feeding system, including the following steps: (1) Adjust the height of the material platform below the material bucket so that the liquid level height in the material bucket is flush with the liquid level reference line; (2) Start the feeding pump, and the material is fed from the bottom of the material bucket into the coating head; (3) As the coating process progresses, the liquid level in the material bucket gradually drops, and the liquid level sensor feeds back a signal that the liquid level value is lower than the liquid level reference line to the controller; (4) After receiving and analyzing the signal, the controller sends a signal to the lifting motor, the lifting motor starts, and the material platform moves upward under the action of the lifting cable until the liquid level height in the material bucket is flush with the liquid level reference line again; (5) Repeat the above operations until the material platform contacts the limit switch.

[0018] The inventive point of the present invention does not lie in the improvement of the control program. The control program for controlling the lifting of the material platform can be realized by using a conventional logic controller, so no detailed description is given.

[0019] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. A high-precision coating feeding system and feeding method provided by an embodiment of the present invention take the height position of the feeding interface of the feeding pump as a reference. By automatically controlling the lifting of the material, the material liquid level is always kept flush with the height of the feeding pump interface, and no manual intervention is required. The liquid level height adjustment is more accurate, so as to realize the stable consistency of the liquid flow rate and pressure supplied by the material pump, and achieve high-precision and high-uniformity coating; 2. A high-precision coating feeding system and feeding method provided by an embodiment of the present invention use a liquid level sensor to control the rise of the material bucket. When the liquid level is lower than the liquid level reference line, the sensor gives a rising signal, and when the liquid level rises to the liquid level reference, the sensor gives a stop signal, realizing the automatic leveling control of the material liquid level and the liquid level reference; 3. A high-precision coating feeding system and feeding method provided by an embodiment of the present invention can realize the automatic control of the material liquid level of the coater, reduce the influence of liquid level changes on coating accuracy and coating uniformity, improve product quality, and increase the yield. Description of the Drawings

[0020] To more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the accompanying drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can be obtained based on these drawings.

[0021] Figure 1 is a schematic structural diagram of an existing coating feeding system; Figure 2 is a schematic structural diagram of the high-precision coating feeding system provided by the embodiment of the present invention; Figure 3 is a schematic circuit control diagram provided by the embodiment of the present invention.

[0022] Marks in the drawings and corresponding component names: 1 - lifting motor, 2 - controller, 31 - upper limit switch, 32 - lower limit switch, 4 - material bucket, 5 - liquid level sensor, 6 - liquid level reference, 71 - first feeding hose, 72 - second feeding hose, 8 - feeding pump, 9 - coating head, 10 - material platform, 11 - platform mounting frame, 12 - lifting fixed pulley, 13 - lifting cable. Detailed embodiments

[0023] To make the objectives, technical solutions, and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in combination with the embodiments and the drawings. The illustrative embodiments and descriptions thereof of the present invention are only used to explain the present invention and do not limit the present invention.

[0024] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is obvious to those of ordinary skill in the art that: these specific details do not have to be used to implement the present invention. In other embodiments, well-known structures are not specifically described in order to avoid obscuring the present invention.

[0025] Throughout the specification, references to "one embodiment", "an embodiment", "an example", or "an example" mean that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment of the present invention. Thus, the phrases "one embodiment", "an embodiment", "an example", or "an example" appearing throughout the specification do not necessarily all refer to the same embodiment or example. Additionally, the specific features, structures, or characteristics may be combined in any suitable combination and / or sub-combination in one or more embodiments or examples. Moreover, those of ordinary skill in the art should understand that the diagrams provided herein are for illustrative purposes only and are not necessarily drawn to scale. The term "and / or" used herein includes any and all combinations of one or more of the associated listed items.

[0026] In the description of the present invention, the orientation or positional relationship indicated by the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is 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 should not be construed as limiting the protection scope of the present invention.

[0027] Currently, when pharmaceutical enterprises or chemical enterprises produce products that need to be coated, such as film agents, most of the material supply of the coating equipment uses a material bucket for feeding, and then a feeding pump provides power to transport the material liquid into the coating head, as Figure 1 shown.

[0028] However, as the material is used and consumed, the liquid level of the material liquid in the material bucket will gradually drop, and the load of the feeding pump will continuously increase, resulting in fluctuations in the flow rate of the material liquid supplied by the feeding pump, affecting the stability of the pressure of the coating head, and thus affecting the coating accuracy and coating uniformity. Currently, in order to solve the problem of unstable feeding caused by the drop of the liquid level, a manual lift truck is usually set below the material bucket, and the height of the material bucket is increased to adjust the height position of the liquid level. However, the manual lift truck requires the operator to manually lift it in real time to adjust the liquid level, with a large working intensity. At the same time, there is no reference benchmark for manual lifting, which may lead to insufficient or excessive lifting distance, resulting in frequent fluctuations in the flow rate of the material liquid supplied by the feeding pump, further affecting the stability of the pressure of the coating head.

[0029] In order to solve the above technical problems, the present invention provides the following technical solutions: Embodiment 1 As Figure 2 shown, the embodiment of the present invention provides a high-precision coating feeding system, including a material bucket 4, a feeding pump 8, and a material lifting control structure. The height of the feeding interface of the feeding pump 8 is used as the liquid level reference line 6; A liquid level sensor 5 is inserted and arranged above the material bucket 4; The liquid level sensor 5 is electrically connected to the material lifting control structure through a controller 2; The material lifting control structure can drive the material bucket 4 to rise or fall according to the feedback signal of the liquid level sensor 5, so that the liquid level height in the material bucket 4 is always flush with the liquid level reference line 6.

[0030] The present invention takes the height position of the feeding interface of the feeding pump as the benchmark, and through automatic control of the material lifting, keeps the material liquid level always flush with the height of the feeding pump interface, without the need for personnel intervention, and the liquid level height adjustment is more accurate, so as to achieve stable and consistent flow rate and pressure of the material liquid supplied by the material pump, and realize high-precision and high-uniformity coating.

[0031] In a specific embodiment, the material lifting control structure includes a lifting motor 1 and a material platform 10. The material bucket 4 is placed on the material platform 10, and the lifting motor 1 can drive the material platform 10 to rise or fall.

[0032] In a specific embodiment, the material lifting control structure further includes a platform mounting frame 11. One end of the material platform 10 is slidably mounted on the platform mounting frame 11, and the end of the material platform 10 can move up and down along the platform mounting frame 11 under the drive of the lifting motor 1.

[0033] In a specific embodiment, the material lifting control structure further includes a lifting fixed pulley 12 installed at the top of the platform mounting frame 11. A lifting cable 13 is installed on the material platform 10, and the end of the lifting cable 13 bypasses the lifting fixed pulley 12 and is connected to the lifting motor 1.

[0034] In a specific embodiment, an upper limit switch 31 and a lower limit switch 32 are installed above the material platform 10 on the platform mounting frame 11.

[0035] In a specific embodiment, the controller 2 includes an automatic mode and a manual mode, and the automatic mode and the manual mode are switched through a knob switch set on the controller 2; in the automatic mode, the material bucket 4 is automatically controlled to rise and fall through the feedback signal of the liquid level sensor 5, and in the manual mode, the material bucket 4 is controlled to rise and fall by the point - motion of the lifting push - button switch.

[0036] As Figure 3 shown, in the present invention, the control is divided into manual and automatic modes. The hand / automatic mode conversion is completed by the knob switch of the controller; in the manual mode, the rise / fall is completed by the point - motion of the push - button switch. When it rises to the upper limit switch, it forms a limit - position protection to stop the machine, and when it descends to the lower limit switch, it forms a limit - position protection to stop the machine; in the automatic mode, the liquid level sensor controls the rise of the material bucket. When the liquid level is lower than the liquid level reference line, the sensor gives a rise signal, the lifting motor starts, drives the material platform to rise. When the liquid level rises to the liquid level reference, the sensor gives a stop signal, and the lifting motor shuts down, realizing the automatic leveling control of the material liquid level and the liquid level reference.

[0037] In a specific embodiment, a discharge port is provided at the bottom of the material bucket 4, and the discharge port is connected to the feed interface of the feed pump 8 through a first feed hose 71.

[0038] In a specific embodiment, the discharge interface of the feed pump 8 is connected to the coating head 9 through a second feed hose 72.

[0039] In a specific embodiment, the position of the liquid level sensor 5 is fixed relative to the feeding pump 8.

[0040] Embodiment 2 The embodiment of the present invention provides a feeding method based on the high-precision coating feeding system, including the following steps: (1) Adjust the height of the material platform below the material barrel so that the liquid level height in the material barrel is flush with the liquid level reference line; (2) Start the feeding pump, and the material is fed into the coating head from the bottom of the material barrel; (3) As the coating process proceeds, the liquid level in the material barrel gradually drops, and the liquid level sensor feeds back a signal that the liquid level value is lower than the liquid level reference line to the controller; (4) After receiving and analyzing the signal, the controller sends a signal to the lifting motor, and the lifting motor starts. The material platform moves upward under the action of the lifting cable until the liquid level height in the material barrel is flush with the liquid level reference line again; (5) Repeat the above operations until the material platform contacts the upper limit switch.

[0041] When all the liquid material in the material barrel has been fed, that is, when the material platform rises to the upper limit switch, it stops rising at this time. After lowering the material platform to the lowest position and contacting the lower limit switch, replenish the liquid material into the material barrel, and then continue the above operation steps.

[0042] The above specific embodiments further elaborate on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-precision coating feeding system, characterized in that, It includes a material bucket (4), a feeding pump (8) and a material lifting control structure, and the height of the feeding interface of the feeding pump (8) serves as the liquid level reference line (6); A liquid level sensor (5) is inserted and arranged above the material bucket (4); The liquid level sensor (5) is electrically connected to the material lifting control structure through a controller (2); The material lifting control structure can drive the material bucket (4) to rise or fall according to the feedback signal of the liquid level sensor (5), so that the liquid level height in the material bucket (4) is always flush with the liquid level reference line (6).

2. The high-precision coating feeding system according to claim 1, wherein The material lifting control structure includes a lifting motor (1) and a material platform (10), the material bucket (4) is placed on the material platform (10), and the lifting motor (1) can drive the material platform (10) to rise or fall.

3. A high-precision coating feeding system according to claim 2, characterized in that, The material lifting control structure further includes a platform mounting frame (11), one end of the material platform (10) is slidably mounted on the platform mounting frame (11), and the end of the material platform (10) can move up and down along the platform mounting frame (11) under the drive of the lifting motor (1).

4. The high-precision coating feeding system according to claim 3, wherein The material lifting control structure further includes a lifting fixed pulley (12) installed at the top of the platform mounting frame (11), a lifting cable (13) is installed on the material platform (10), and the end of the lifting cable (13) bypasses the lifting fixed pulley (12) and is connected to the lifting motor (1) for installation.

5. A high-precision coating feeding system according to claim 4, characterized in that, A limit switch upper (31) and a limit switch lower (32) are installed above the material platform (10) on the platform mounting frame (11).

6. A high-precision coating feeding system according to claim 1, characterized in that, The controller (2) includes an automatic mode and a manual mode, and the automatic mode and the manual mode are switched through a rotary switch arranged on the controller (2); in the automatic mode, the material bucket (4) is automatically controlled to lift and lower through the feedback signal of the liquid level sensor (5), and in the manual mode, the material bucket (4) is controlled to lift and lower by a momentary action of a lifting push button switch.

7. A high-precision coating feeding system according to claim 1, wherein, A discharge port is arranged at the bottom of the material bucket (4), and the discharge port is connected to the feeding interface of the feeding pump (8) through a first feeding hose (71).

8. The high-precision coating feeding system according to claim 1, wherein The discharge interface of the feeding pump (8) is connected to a coating head (9) through a second feeding hose (72).

9. The high-precision coating feeding system according to claim 1, characterized in that The position of the liquid level sensor (5) is fixed relative to the feeding pump (8).

10. A feeding method for the high-precision coating feeding system according to any one of claims 1-9, characterized in that, It includes the following steps: (1) Adjust the height of the material platform below the material bucket so that the liquid level height in the material bucket is flush with the liquid level reference line; (2) Start the feeding pump, and the material is fed from the bottom of the material bucket into the coating head; (3) As the coating process proceeds, the liquid level in the material bucket gradually drops, and the liquid level sensor feeds back a signal that the liquid level value height is lower than the liquid level reference line to the controller; (4) After receiving and analyzing the signal, the controller sends a signal to the lifting motor, the lifting motor starts, and the material platform moves upward under the action of the lifting cable until the liquid level height in the material bucket is flush with the liquid level reference line again; (5) Repeat the above operations until the material platform contacts the limit switch upper.

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