Container spraying monitoring system and container automatic spraying system

Abstract

The utility model provides a container spraying monitoring system and an automatic container spraying system. The container spraying monitoring system comprises a flow meter and a first control unit. The flowmeter is suitable for being connected between the spray gun and the hydraulic pump in series through a pipeline to detect the flow of the coating. The first control unit is connected to the flow meter so as to receive the flow of the coating detected by the flow meter. The container spraying monitoring system further comprises at least one of a Web end computer and a server and a switch, and the Web end computer is in communication connection with the first control unit through the switch so as to at least receive the flow of the coating detected by the flow meter. The server is in communication connection with the first control unit through the switch so as to at least receive the flow of the coating detected by the flow meter. According to the utility model, the paint can be saved, the cost can be reduced, more monitoring requirements can be met, and the monitoring flexibility can be improved.

Description

Technical Field

[0001] This utility model relates generally to the technical field of container manufacturing, and more specifically to a container painting monitoring system and an automated container painting system. Background Technology

[0002] A container is a set of tools that can carry packaged or unpackaged goods for transportation and facilitate loading, unloading and handling by mechanical equipment.

[0003] Container production involves multiple stages, with painting being a crucial one. Paint cost is the second highest among material costs in container manufacturing. Currently, the exact amount of paint used in the painting process is unknown, and painting parameters are adjusted manually based on experience, resulting in significant waste. Utility Model Content

[0004] The present invention includes a series of simplified concepts, which will be further explained in detail in the detailed description section. This present invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] To at least partially solve the above problems, the first aspect of this utility model provides a container painting monitoring system applied to a container painting production line. The container painting production line includes a paint storage container, a hydraulic pump, a spray gun, a hydraulic motor, and a hydraulic press. The paint storage container, the hydraulic pump, and the spray gun are sequentially connected via pipelines. The hydraulic motor is connected to the hydraulic press via pipelines, and the hydraulic motor is driven by the hydraulic pump. The container painting monitoring system includes:

[0006] A flow meter, adapted to be connected in series between the spray gun and the hydraulic pump via a pipeline, to detect the flow rate of the paint; and

[0007] A first control unit, connected to the flow meter, is configured to receive the flow rate of the paint detected by the flow meter.

[0008] The container painting monitoring system also includes at least one of a web-based computer and a server, as well as a switch. The web-based computer is connected to the first control unit via the switch to receive at least the paint flow rate detected by the flow meter. The server is connected to the first control unit via the switch to receive at least the paint flow rate detected by the flow meter.

[0009] According to the container painting monitoring system of the first aspect of this utility model, a flow meter can be installed to detect the paint flow rate, thereby facilitating the user to know the paint flow rate and control it more accurately, which in turn helps to save paint and reduce costs. By setting up a first control unit, a switch, and at least one of a web-based computer and a server, the paint flow rate can be monitored using the web-based computer and / or the server, which helps to meet more monitoring needs and improve the flexibility of monitoring.

[0010] Optionally, the container painting monitoring system further includes:

[0011] An electric pressure proportional valve, adapted to be connected in series via a pipeline between the output end of the hydraulic press and the hydraulic motor, the electric pressure proportional valve being electrically connected to the first control unit to regulate the pressure of the hydraulic oil supplied to the hydraulic motor under the control of the first control unit; and

[0012] A pump pressure gauge is adapted to be connected in series between the electric pressure proportional valve and the hydraulic motor via a pipeline. The pump pressure gauge is electrically connected to the first control unit. The pump pressure gauge is used to detect the pressure of the hydraulic oil supplied to the hydraulic motor and send it to the first control unit so that the first control unit can determine whether the pressure of the hydraulic oil supplied to the hydraulic motor has reached the target oil pressure.

[0013] According to the container painting monitoring system of this utility model, the first control unit can obtain the pressure of the hydraulic oil supplied to the hydraulic motor, and then control the voltage proportional valve according to the pressure of the hydraulic oil supplied to the hydraulic motor and the target oil pressure to adjust the pressure of the hydraulic oil supplied to the hydraulic motor, so that the pressure of the hydraulic oil supplied to the hydraulic motor reaches the allowable deviation range of the target oil pressure. By adopting the above technical means, automatic control of the pumping flow rate of the hydraulic pump can be realized.

[0014] Optionally, the container painting monitoring system further includes:

[0015] A return valve is connected via a pipeline between the hydraulic pump and the spray gun, and between the spray gun and the paint storage container. The return valve has a spraying state and a return state. In the spraying state, the return valve allows paint to flow to the spray gun and prevents paint from flowing to the paint storage container. In the return state, the return valve allows paint to flow to the paint storage container and prevents paint from flowing to the spray gun.

[0016] A return current switch assembly, which is electrically connected to the first control unit;

[0017] Air compressor; and

[0018] A solenoid valve assembly is connected in series with the return valve and the air compressor via a pipeline and is electrically connected to the first control unit. The first control unit controls the opening and closing state of the solenoid valve assembly according to the opening and closing state of the return switch assembly, thereby changing the state of the return valve.

[0019] According to the container spraying monitoring system of this utility model, the delivery direction of the paint pumped by the hydraulic pump can be switched between the paint storage container and the spray gun as needed. This allows the paint to remain in the pipeline during periods when spraying is not in progress, preventing or avoiding the paint from solidifying and clogging the pipeline or depositing inside. This ensures that the pipeline can maintain good delivery conditions for a longer service life, thereby extending the pipeline's service life and ensuring the stability of the production cycle.

[0020] Optionally, the return switch assembly includes:

[0021] A return flow mode selection switch, which is electrically connected to the first control unit; and

[0022] A manual return switch, which is electrically connected to the first control unit.

[0023] The first control unit selects either a manual return mode or an automatic return mode based on the on / off state of the return mode selection switch. In the manual return mode, the first control unit controls the opening and closing state of the solenoid valve assembly based on the on / off state of the manual return switch. In the automatic return mode, the first control unit controls the opening and closing state of the solenoid valve assembly based on the number of containers to be painted.

[0024] The container painting monitoring system of this utility model can select manual or automatic control for whether the paint is reflowed, improving the flexibility of control and accommodating more control needs.

[0025] Optionally, the container painting production line includes a plurality of painting components, each of which includes a hydraulic pump, a spray gun and a hydraulic motor.

[0026] The container painting monitoring system includes a plurality of backflow valves corresponding to the plurality of painting components;

[0027] The reflux switch assembly includes a plurality of manual reflux sub-switches and a manual reflux master switch, all of which are electrically connected to the first control unit;

[0028] The solenoid valve assembly includes a plurality of solenoid valves corresponding to the plurality of spraying assemblies;

[0029] The first control unit controls the state of all the solenoid valve assemblies according to the on / off state of the main manual return switch, and controls the state of each solenoid valve according to the on / off state of the plurality of individual manual return switches.

[0030] According to the container painting monitoring system of this utility model, in the application scenario of a container painting production line with multiple parallel painting components, it can realize unified control of the status of the return valve as needed, and independently control the status of each return valve as needed.

[0031] Optionally, the container painting production line further includes a conveying device for conveying containers, the conveying device including a drive motor and a frequency converter, the frequency converter being electrically connected to the drive motor;

[0032] The container painting monitoring system also includes a second control unit, which is adapted to be connected to the frequency converter and is used to send start and stop signals to the frequency converter.

[0033] The first control unit is connected to the second control unit, and the first control unit is used to determine the amount of paint used in a single container based on the start signal and the stop signal of the second control unit and the paint flow rate detected by the flow meter.

[0034] The container painting monitoring system of this utility model makes it easy to know the amount of paint used in the painting process for each container.

[0035] Optionally, the container painting monitoring system further includes:

[0036] A pipe pressure gauge, adapted to be connected in series in the pipe between the hydraulic pump and the spray gun, the pipe pressure gauge being electrically connected to the first control unit for detecting and transmitting to the first control unit the pressure within the pipe between the hydraulic pump and the spray gun; and / or

[0037] The container painting monitoring system also includes a human-machine interface device, which is electrically connected to the first control unit so as to be able to communicate with the first control unit.

[0038] According to this utility model, the container painting monitoring system uses a pipe pressure gauge to easily monitor the pressure in the pipeline between the hydraulic pump and the spray gun, providing users with intuitive data to understand the pressure on the pipeline and prevent pipe bursts. A human-machine interface is also included, allowing users to monitor the painting production line from a closer location, such as by viewing flow data.

[0039] Optionally, the container painting production line includes a plurality of painting components, each of which includes a hydraulic pump, a spray gun and a hydraulic motor.

[0040] The container painting monitoring system includes a plurality of flow meters, each of which is adapted to be installed in a corresponding painting component.

[0041] The container spraying monitoring system of this utility model facilitates independent monitoring of the paint flow rate of each parallel spraying component.

[0042] Optionally, the container painting production line includes a plurality of painting modules, each of which includes a hydraulic pump and a hydraulic motor;

[0043] The container painting monitoring system includes a plurality of the aforementioned electric pressure proportional valves and a plurality of the aforementioned pump pressure gauges, each of the aforementioned electric pressure proportional valves being adapted to be installed in a corresponding manner in each painting assembly, and each of the aforementioned pump pressure gauges being adapted to be installed in a corresponding manner in each painting assembly.

[0044] According to the container painting monitoring system of this utility model, it is convenient to independently monitor the oil pressure of the hydraulic oil delivered to the hydraulic pumps of each painting component, thereby helping to independently control the flow rate of paint in each painting component.

[0045] A second aspect of this utility model provides an automated container painting system, the automated container painting system comprising:

[0046] A container painting production line includes a paint storage container, a hydraulic pump, spray guns, a hydraulic motor, and a hydraulic press. The paint storage container, the hydraulic pump, and the spray gun are connected sequentially via pipelines. The hydraulic motor is connected to the hydraulic press via pipelines, and the hydraulic motor is driven by the hydraulic pump.

[0047] The aforementioned container painting monitoring system.

[0048] According to the container automated painting system of the second aspect of this utility model, by applying the above-mentioned container painting monitoring system, it is not only convenient for users to know the paint flow rate and control the paint flow rate more accurately, which helps to save paint and reduce costs, but also allows the use of a web-based computer and / or server to monitor at least the paint flow rate, which helps to meet more monitoring needs and improve the flexibility of monitoring. Attached Figure Description

[0049] The following drawings, which illustrate embodiments of the present invention, are incorporated herein as part of the present invention for understanding the invention. The drawings show embodiments of the present invention and their descriptions, serving to explain the principles of the present invention. In the drawings,

[0050] Figure 1This is a schematic diagram of a container painting monitoring system according to a preferred embodiment of the present invention.

[0051] Figure 2 This is a system block diagram of a container painting monitoring system according to a preferred embodiment of the present invention;

[0052] Figure 3 This is a circuit diagram of the power supply circuit of a container painting monitoring system according to a preferred embodiment of the present invention.

[0053] Figure 4 This is a circuit diagram showing the connection between a 485 communication component for the first control unit and six flow meters according to a preferred embodiment of the present invention.

[0054] Figure 5 This is a circuit diagram showing the connection between the normally closed contacts of the six relays KA1 to KA6 and the power supply circuit and the signal input terminals of the six proportional amplifiers according to a preferred embodiment of the present invention.

[0055] Figure 6 This is a circuit diagram showing the connection between the normally open contacts of the six relays KA1 to KA6 and the signal input terminals of the analog output component and the six proportional amplifiers, according to a preferred embodiment of the present invention.

[0056] Figure 7 This is a circuit diagram showing the connection between the 485 communication component of the first control unit and six pump pressure gauges and six pipeline pressure gauges according to a preferred embodiment of the present invention.

[0057] Figure 8 This is a circuit diagram showing the connection between the first control unit and the digital input circuit according to a preferred embodiment of the present invention.

[0058] Figure 9 This is a circuit diagram showing the connection between the first control unit and the digital output circuit according to a preferred embodiment of the present invention.

[0059] Figure 10 This is a circuit diagram showing the connection of the normally open contacts of six relays KA7 to KA12 to a power supply circuit and six solenoid valves YV1 to YV6 according to a preferred embodiment of the present invention.

[0060] Figure 11 This is a circuit diagram showing the connection between the analog input component of the first control unit and the frequency converter according to a preferred embodiment of the present invention; and

[0061] Figure 12(a) to (f) are circuit diagrams of six proportional amplifiers according to a preferred embodiment of the present invention. Detailed Implementation

[0062] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with embodiments of the present invention.

[0063] To fully understand the embodiments of this utility model, a detailed structure will be presented in the following description. Obviously, the implementation of the embodiments of this utility model is not limited to the specific details familiar to those skilled in the art.

[0064] It should be understood that the terminology used herein is intended only to describe particular embodiments and is not intended to limit the scope of the invention. The singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. When the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0065] The ordinal numbers such as "first" and "second" used in this utility model are merely identifiers and do not have any other meaning, such as a specific order. Furthermore, for example, the term "first component" does not imply the existence of a "second component," and the term "second component" does not imply the existence of a "first component." It should be noted that the terms "upper," "lower," "front," "rear," "left," "right," "inner," "outer," and similar expressions used in this utility model are for illustrative purposes only and are not intended to be limiting.

[0066] The terms “center,” “parallel,” “perpendicular,” “aligned,” and “symmetrical” used in this invention do not have to be precise, but can include typical engineering tolerances.

[0067] The specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings, which show representative embodiments of the present invention and are not intended to limit the present invention.

[0068] In related technologies, container production involves multiple stages, with painting being a crucial one. Paint cost is the second highest among material costs in container manufacturing. Currently, the exact amount of paint used in the production process is unknown, and painting parameters are adjusted manually based on experience, resulting in significant waste. Furthermore, quality defects caused by paint application cannot be detected promptly, leading to increased rework costs.

[0069] To address at least some of the aforementioned problems, this utility model provides a container painting monitoring system and an automated container painting system. The automated container painting system includes a container painting monitoring system and a container painting production line. The container painting monitoring system monitors the status of the container painting production line. The container painting production line is used to achieve the painting purpose on the containers. In some embodiments, the container painting production line can be distributed within spaces such as a paint mixing room, a pump room, a compression station, and a spray booth. The paint mixing room can be referred to as a paint mixing chamber or paint mixing room, etc. The paint mixing room can at least be equipped with paint storage containers. The pump room can be referred to as a pump room, etc. The pump room can at least be equipped with components such as a hydraulic pump and a hydraulic motor. The compression station can at least be equipped with components such as a hydraulic press for compressing working oil and an air compressor for compressing air. The working oil compressed by the hydraulic press can be referred to as hydraulic oil. The air compressed by the air compressor can be referred to as compressed air. The spray booth can at least be equipped with components such as a container conveyor and spray guns for transporting containers. In addition, container painting production lines can also be equipped with electrical cables, paint delivery pipes, hydraulic oil delivery pipes, gas delivery pipes, etc.

[0070] The following will be referred to as Figures 1 to 12 The examples shown provide a detailed description of a container painting monitoring system and an automated container painting system according to embodiments of the present invention.

[0071] See Figure 1 and Figure 2This utility model provides a container painting monitoring system applied to a container painting production line. The container painting production line includes a paint storage container, a hydraulic pump, a spray gun, a hydraulic motor, and a hydraulic press. The paint storage container, hydraulic pump, and spray gun are connected sequentially via pipelines. The hydraulic pump pumps paint, such as oil paint, from the paint storage container to the spray gun. With the spray gun open, paint is sprayed from the spray gun to paint the container located in the paint booth. The hydraulic motor is connected to the hydraulic press via pipelines. The hydraulic press provides hydraulically driven working oil to the hydraulic motor, thereby driving the output shaft of the hydraulic motor to rotate. The hydraulic motor is driven to the hydraulic pump. The output shaft of the hydraulic motor is connected to the input shaft of the hydraulic pump to drive the hydraulic pump. The container painting monitoring system may include a flow meter and a control unit. The flow meter is adapted to be connected in series between the spray gun and the hydraulic pump via pipelines to detect the flow rate of the paint. The control unit is connected to the flow meter to receive the paint flow rate detected by the flow meter. The container painting monitoring system may also include at least one of a web-based computer and a server, as well as a switch. The web-based computer communicates with the control unit via a switch to receive at least the paint flow rate detected by the flow meter. The server also communicates with the control unit via a switch to receive at least the paint flow rate detected by the flow meter.

[0072] According to an embodiment of the present invention, the container painting monitoring system can detect the paint flow rate by setting a flow meter, thereby facilitating users to know the paint flow rate and more accurately control the paint flow rate, which in turn helps to save paint and reduce costs. By setting up a control unit, a switch, and at least one of a web-based computer and a server, the system can monitor the paint flow rate using the web-based computer and / or the server, which helps to meet more monitoring needs and improve the flexibility of monitoring.

[0073] Optionally, communication between the web-based computer and the switch, between the switch and the control unit, and between the server and the switch follows the TCP / IP protocol.

[0074] In some embodiments, the switch is an industrial switch. The container painting monitoring system includes both a web-based computer and a server. A web client refers to a user terminal that accesses and uses a web-based application through a browser. A web-based computer can be understood as a computer with a web client. The server can be a cloud server.

[0075] For example, a container painting production line may include a plurality of painting assemblies. Each painting assembly includes a hydraulic pump, a spray gun, and a hydraulic motor. The container painting monitoring system may include a plurality of flow meters. Each flow meter is adapted to be installed in a corresponding position in a particular painting assembly.

[0076] The container spraying monitoring system of this utility model facilitates independent monitoring of the paint flow rate of each parallel spraying component.

[0077] See Figure 2 and Figure 4 Optionally, the container painting production line may include a six-channel painting assembly. For example... Figure 2 As shown, there are six hydraulic pumps, namely hydraulic pump 1, hydraulic pump 2, hydraulic pump 3... hydraulic pump 6. There are six spray guns, namely spray gun 1, spray gun 2, spray gun 3... spray gun 6. There are six hydraulic motors, namely hydraulic motor 1, hydraulic motor 2, hydraulic motor 3... hydraulic motor 6. Correspondingly, there are six flow meters. Figure 2 In the middle, the six flow meters are flow meter 1, flow meter 2, flow meter 3... flow meter 6.

[0078] Optionally, the flow meter is a mass flow meter. A mass flow meter is an instrument used to directly measure the mass flow rate of a fluid, and is widely used in industrial process control, laboratory research, and environmental monitoring. Unlike volumetric flow meters, mass flow meters can directly measure the mass flow rate of a fluid without density conversion. The mass flow meter can be one of the following: a Coriolis mass flow meter, a thermal mass flow meter, a differential pressure mass flow meter, a vortex mass flow meter, or an ultrasonic mass flow meter, all currently available in the technology.

[0079] See Figure 1 , Figure 2 as well as Figure 7 In some embodiments, the container painting monitoring system may further include an electric pressure proportional valve and a pump pressure gauge. The electric pressure proportional valve is adapted to be connected in series between the output of the hydraulic press and the hydraulic motor via a pipeline. The electric pressure proportional valve is electrically connected to a first control unit to regulate the pressure of the hydraulic oil supplied to the hydraulic motor under the control of the first control unit. The electric pressure proportional valve can change its valve opening according to the control signal from the first control unit, thereby changing the pressure of the hydraulic oil supplied to the hydraulic motor. The pump pressure gauge is adapted to be connected in series between the electric pressure proportional valve and the hydraulic motor via a pipeline, and is electrically connected to the first control unit. The pump pressure gauge is used to detect the pressure of the hydraulic oil supplied to the hydraulic motor and send it to the first control unit, so that the first control unit can determine whether the pressure of the hydraulic oil supplied to the hydraulic motor has reached the target oil pressure. When the pressure of the hydraulic oil supplied to the hydraulic motor detected by the pump pressure gauge has not reached the target oil pressure, the first control unit controls the electric pressure proportional valve to adjust the valve opening, thereby regulating the painting pressure.

[0080] According to an embodiment of the container painting monitoring system of this utility model, the first control unit can acquire the pressure of the hydraulic oil supplied to the hydraulic motor, and then control the voltage proportional valve according to the pressure of the hydraulic oil supplied to the hydraulic motor and the target oil pressure to adjust the pressure of the hydraulic oil supplied to the hydraulic motor, so that the pressure of the hydraulic oil supplied to the hydraulic motor reaches the allowable deviation range of the target oil pressure. By adopting the above technical means, automatic control of the pumping flow rate of the hydraulic pump can be realized.

[0081] See Figure 2 and Figure 7 For example, a container painting production line includes a plurality of painting assemblies. Each painting assembly includes a hydraulic pump and a hydraulic motor. The container painting monitoring system may include a plurality of proportional pressure valves and a plurality of pump pressure gauges. Each proportional pressure valve is adapted to be installed in a corresponding position in each painting assembly. Each pump pressure gauge is adapted to be installed in a corresponding position in each painting assembly.

[0082] According to the container painting monitoring system of this utility model, it is convenient to independently monitor the oil pressure of the hydraulic oil delivered to the hydraulic pumps of each painting component, thereby helping to independently control the flow rate of paint in each painting component.

[0083] Continue reading Figure 2 and Figure 7 Optionally, the container painting production line may include a six-channel painting assembly. Accordingly, the number of electric pressure proportional valves and pump pressure gauges is six each. See also Figure 2 The six proportional valves are designated as proportional valve 1, proportional valve 2, proportional valve 3... proportional valve 6. Correspondingly, there are six pump pressure gauges. Figure 2 In the middle, the six pump pressure gauges are pump pressure gauge 1, pump pressure gauge 2, pump pressure gauge 3... pump pressure gauge 6.

[0084] Optionally, the pump pressure gauge is a digital pressure gauge.

[0085] Alternatively, the electric pressure proportional valve can be referred to as an electro-hydraulic proportional control valve. The electric pressure proportional valve can employ a hydraulic control component, as is available in the prior art, capable of controlling the hydraulic actuator according to a control signal.

[0086] See Figure 2 , Figure 8 as well as Figure 10In some embodiments, the container painting monitoring system may further include a return valve, a return switch assembly, an air compressor, and a solenoid valve assembly. The return valve is connected via piping between the hydraulic pump and the spray gun, and between the spray gun and the paint storage container. The return valve has a spraying state and a return state. In the spraying state, the return valve allows paint to flow to the spray gun and prevents paint from flowing to the paint storage container. In the return state, the return valve allows paint to flow to the paint storage container and prevents paint from flowing to the spray gun. The return switch assembly is electrically connected to a first control unit. The solenoid valve assembly is connected in series with the return valve and the air compressor via piping and is also electrically connected to the first control unit. The first control unit controls the opening and closing state of the solenoid valve assembly according to the on / off state of the return switch assembly, thereby changing the state of the return valve.

[0087] According to the embodiments of the present invention, the container painting monitoring system can switch the flow direction of the paint pumped by the hydraulic pump between the paint storage container and the spray gun as needed, so as to maintain the flow of paint in the pipeline when painting is not in progress, so as to prevent or avoid the paint from clogging the pipeline or depositing in the pipeline due to solidification, thereby ensuring that the pipeline can maintain a good conveying state for a longer service life, and achieving the purpose of extending the service life of the pipeline and ensuring the stability of the production cycle.

[0088] For example, the reflux switch assembly may include a reflux mode selection switch and a manual reflux switch. The reflux mode selection switch is electrically connected to a first control unit. The manual reflux switch is also electrically connected to the first control unit. The first control unit selects either a manual reflux mode or an automatic reflux mode based on the on / off state of the reflux mode selection switch. In manual reflux mode, the first control unit controls the opening and closing state of the solenoid valve assembly based on the on / off state of the manual reflux switch. It is understood that in manual reflux mode, the user controls the opening and closing state of the solenoid valve assembly by operating and changing the opening and closing of the manual reflux switch, thereby changing the state of the reflux valve. In automatic reflux mode, the first control unit controls the opening and closing state of the solenoid valve assembly based on the number of containers being painted. It is understood that in automatic reflux mode, the user's operation of the manual reflux switch has no effect; the first control unit automatically controls the state of the reflux valve based on the number of containers being painted.

[0089] The container painting monitoring system of this utility model can select manual or automatic control for whether the paint is reflowed, improving the flexibility of control and accommodating more control needs.

[0090] For example, a container painting production line may include a plurality of painting assemblies. Each painting assembly includes a hydraulic pump, a spray gun, and a hydraulic motor. The container painting monitoring system may include a plurality of return valves corresponding to the plurality of painting assemblies. The return switch assembly includes a plurality of manual return branch switches and a manual return master switch. The plurality of manual return branch switches and the manual return master switch are all electrically connected to a first control unit. The solenoid valve assembly includes a plurality of solenoid valves corresponding to the plurality of painting assemblies. The first control unit controls the state of all solenoid valves according to the on / off state of the manual return master switch to uniformly change the state of all return valves. The first control unit controls the state of the plurality of solenoid valves according to the on / off states of the plurality of manual return branch switches to independently control the state of each return valve.

[0091] According to the container painting monitoring system of this utility model, in the application scenario of a container painting production line with multiple parallel painting components, it can realize unified control of the status of the return valve as needed, and independently control the status of each return valve as needed.

[0092] like Figure 2 As shown, the reflux switch assembly is located in the reflux control box. Each switch can be a rotary selector switch with both on and off states. Figure 1 The switching components include, but are not limited to, the return current switching components.

[0093] exist Figure 2 In the example shown, the solenoid valve assembly is located in a solenoid valve cabinet. The solenoid valve assembly includes six solenoid valves, each controlling one of the six return valves. The return switch assembly is located in the control box and includes six manual return individual switches, one manual return master switch, one return mode selection switch, and one manual return master switch.

[0094] In some embodiments, the container painting production line may further include a conveying device for transporting containers. The conveying device includes a drive motor and a frequency converter. The frequency converter is electrically connected to the drive motor. The container painting monitoring system further includes a second control unit. The second control unit is adapted to be connected to the frequency converter and is used to send start and stop signals to the frequency converter. A first control unit is electrically connected to the second control unit. The first control unit is used to determine the amount of paint used for a single container based on the start and stop signals from the second control unit and the paint flow rate detected by a flow meter.

[0095] The container painting production line also includes a conveying device for transporting containers, the conveying device including a drive motor and a frequency converter, the frequency converter being electrically connected to the drive motor;

[0096] The container painting monitoring system of this utility model makes it easy to know the amount of paint used in the painting process for each container.

[0097] Optionally, the conveying device of the container painting production line may include, for example, a conveyor track and a traction assembly capable of moving along the conveyor track. The traction assembly includes the aforementioned drive motor and frequency converter. The frequency converter is used to change the frequency of the AC power supplied to the drive motor according to control commands, thereby changing the speed of the drive motor, and thus changing the speed and frequency of the container passing through the paint booth. The passing frequency here can also be referred to as the container pulling frequency, which reflects the number of painting areas passed through the paint booth in one cycle.

[0098] See Figure 1 , Figure 2 as well as Figure 7 In some embodiments, the container painting monitoring system may also include a pipe pressure gauge. The pipe pressure gauge is adapted to be connected in series in the pipe between the hydraulic pump and the spray gun. The pipe pressure gauge is electrically connected to a first control unit. The pipe pressure gauge is used to detect and transmit the pressure within the pipe between the hydraulic pump and the spray gun to the first control unit. Here, the pressure detected by the pipe pressure gauge within the pipe is a pressure value.

[0099] According to the container painting monitoring system of this utility model, by setting a pipe pressure gauge, it is convenient to monitor the pressure of the pipeline between the hydraulic pump and the spray gun, so as to provide users with more intuitive data to understand the pressure on the pipeline and prevent pipe bursts.

[0100] Optionally, the pressure gauge is a digital pressure gauge.

[0101] See Figure 2 and Figure 7 Optionally, in container painting production lines that include multiple painting modules, the number of pressure gauges is adapted to the number of painting modules. For example, if the painting modules have flow paths, then six pressure gauges are used, each corresponding to a specific painting module, to monitor the pressure value of the pipeline for each module. See also... Figure 2 The six pressure gauges are pressure gauge 1, pressure gauge 2, pressure gauge 3... pressure gauge 6.

[0102] See Figure 1 and Figure 2 In some embodiments, the container painting monitoring system may further include a human-machine interface device. The human-machine interface device is electrically connected to the first control unit to enable communication with the first control unit.

[0103] According to the container painting monitoring system of this utility model, by setting up a human-machine interaction device, users can meet their needs for monitoring the painting production line, such as viewing flow data, in a space closer to the painting production line.

[0104] Optionally, the human-computer interaction device is a device that includes a human-machine interface (HMI), comprising hardware such as a display screen, and typically also storing executable software for monitoring. For example, a human-computer interaction device could be a tablet computer with a touchscreen.

[0105] See Figure 2 The human-computer interaction device, switch and first control unit can be installed in the electrical control cabinet.

[0106] Optionally, the first control unit can be a SMART200 PLC chip, or other PLC chips. The first control unit contains an executable program for automating the painting process during container manufacturing.

[0107] Optionally, the aforementioned web-based computer is primarily used to monitor data detected by instruments such as flow meters, pump pressure gauges, and pipe pressure gauges uploaded by the first control unit, and can generate trend curves based on the received data. The web-based computer is also used to display the operating parameters of each component, receive control parameters input by the user, and send these parameters to the SMART200 via an industrial switch, enabling the SMART200 to control the operating status of each component.

[0108] See Figure 8 In addition, the container painting monitoring system may also include an automatic pump pressure control switch and an emergency stop switch. When triggered, the automatic pump pressure control switch sends a PID (Automatic Pilot Controller) digital input signal to the first control unit. The first control unit controls the proportional pressure valve to change its opening degree based on the PID digital input signal. When triggered, the emergency stop switch sends an emergency stop digital input signal to the first control unit. The first control unit controls the hydraulic pump, oil press, and air compressor to stop operating based on the emergency stop digital input signal.

[0109] See Figure 2 In addition, the container painting monitoring system may also include a filter. The filter is connected via piping between the hydraulic pump and the spray gun to prevent foreign objects from clogging the spray gun. In applications where flow meters and pressure gauges are installed, the filter is placed before both to prevent foreign objects from clogging and damaging the flow meters and pressure gauges. In applications such as... Figure 2 In the example, there are six filters: filter 1, filter 2, filter 3... filter 6.

[0110] Specifically, one control method for the first control unit can be as follows:

[0111] The communication polling function reads the flow rate detected by the flow meter and automatically calculates the amount of paint used per box based on the box start / stop signal (the amount of paint used per box = the cumulative mass M2 read when the box stop signal is triggered - the cumulative mass M1 read when the box start signal is triggered).

[0112] The communication polling function reads the pressure of the working oil supplied to the hydraulic motor, which is detected by the pump pressure gauge.

[0113] The communication polling function reads the pressure of the paint inside the pipe detected by the pipe pressure gauge;

[0114] The PID algorithm automatically controls the electric pressure proportional valve to change the pressure of the working oil supplied to the hydraulic motor, maintaining the pressure value measured by the pump pressure gauge near the preset target pressure value. It can also manually control the pressure of the working oil supplied to the hydraulic motor according to the manual pressure control command.

[0115] The system automatically controls the reflux valve to switch to reflux mode based on the set reflux parameters (automatic reflux for every X containers produced, X is configurable), and is also compatible with the manual control mode for switching the reflux valve to reflux mode.

[0116] The first control unit is also used to transmit monitoring data such as the pressure of the proportional valve, the pressure of the pipeline, the pressure of the pump, and the flow rate of the coating to a server, a human-machine interface device, and a web-based computer via a switch. The first control unit can also control the operating status of components or electrical parts such as the electric pressure proportional valve and the solenoid valve assembly based on the monitoring data.

[0117] In some embodiments, the container painting monitoring system further includes a second control unit. The second control unit controls the start and stop of the container conveyor, the start and stop of the spray guns, and outputs production signals. The first control unit receives the production signals and automatically calculates the daily production and cumulative production. The second control unit may be a PLC of model FX3U. In other embodiments, the second control unit may be a PLC of other models or series.

[0118] See below. Figures 3 to 12 The example shown further illustrates the circuit structure according to an embodiment of the present invention.

[0119] like Figure 3The diagram shows the circuit structure of the power supply circuit for the container painting monitoring system. The power supply circuit, along with the human-machine interface, switch, and first control unit, are all housed in the electrical control cabinet. The control cabinet includes an openable door. QF1 to QF9 in the diagram are circuit breakers. G1 to G3 are switching power supplies. G1 and G2 have the same function: converting AC mains power to 24V DC. G3 converts AC mains power to 12V DC. Switching power supply G1 provides a 24V1 power supply terminal via circuit breaker QF5. Switching power supply G1 provides a 24V2 power supply terminal via circuit breaker QF6. Switching power supply G1 also provides a 0V-1 common terminal. The 24V1 power supply terminal and the 0V-1 common terminal power the first control unit and the human-machine interface. The 24V2 power supply terminal and the 0V-1 common terminal power the six flow meters. Switching power supply G2 provides a 24V3 power supply terminal via circuit breaker QF7. Switching power supply G2 is supplied with a 24V4 power terminal via circuit breaker QF8. Switching power supply G2 also provides a 0V-2 common terminal. The 24V3 power terminal and the 0V-2 common terminal power six proportional pressure valves and six pump pressure gauges. The 24V4 power terminal and the 0V-2 common terminal power six pipeline pressure gauges. The DC terminal of switching power supply G3 is supplied with a 12V1 power terminal and a 0V-3 common terminal via potentiometer RP. By adjusting potentiometer RP, a DC voltage of 0V to 12V can be obtained at the 12V1 power terminal and the 0V-3 common terminal to power the pumps. Figure 3 The circuit shown is connected to the signal input terminals of six proportional amplifiers. The signal output terminals of the proportional amplifiers are connected to the signal input terminals of the pressure proportional valve to control the valve opening. One end of circuit breaker QF9 is connected to the live wire L1, and the other end is connected to the neutral wire N1 through a parallel socket circuit, temperature control circuit, and door-stop lighting circuit. The socket circuit includes a three-hole socket XS, which is electrically connected to QF9, N1, and ground respectively. The temperature control circuit includes a temperature control switch ST and a cooling fan FN. The temperature control switch ST automatically closes when the temperature inside the electrical control cabinet reaches the temperature threshold, thus enabling the cooling fan FN to operate when QF1 and QF9 are closed, achieving the purpose of heat dissipation. The temperature control switch ST can be a temperature relay as in existing technology. The door-stop lighting circuit includes a door-stop switch DS and a lighting fixture EL. The door-stop switch DS is located on the cabinet door or cabinet body. The lighting fixture EL is located inside the cabinet and is used to illuminate the electrical cabinet. The door-stop switch is a normally closed switch. When the cabinet door is closed, the door stop switch DS is open, and the lighting fixture EL is off; when the cabinet door is opened, the door stop switch DS is closed, and the lighting fixture EL is on. The lighting fixture EL can be replaced by other existing lighting fixtures.

[0120] like Figure 4The diagram shows the circuit structure of the external 485 communication component SBCM01 for the first control unit, connected to six flow meters. This 485 communication component is used by the first control unit to poll each flow meter to obtain the flow data detected by the flow meters. An external connection is used because the 485 communication component (a nine-pin interface) built into the first control unit is used to connect six pump pressure gauges and six pipe pressure gauges. (See...) Figure 7 .

[0121] like Figure 5 The diagram shows the circuit structure between the normally closed contacts of the six relays KA1 to KA6 and the power supply circuit and the signal input terminals of the six proportional amplifiers. When the coils of relays KA1 to KA6 are not energized, the normally closed contacts of KA1 to KA6 remain closed; when the coils of relays KA1 to KA6 are energized, the normally closed contacts of KA1 to KA6 open.

[0122] like Figure 6 The diagram shows the circuit structure between the normally open contacts of six relays KA1 to KA6 and the signal input terminals of two analog output components EMAQ04 and six proportional amplifiers. When the coils of relays KA1 to KA6 are not energized, their normally closed contacts are open; when the coils of relays KA1 to KA6 are energized, their normally closed contacts are closed. Each of the two analog output components EMAQ04 provides four interfaces, which can be connected to the contacts of four relays respectively. Taking the supply of valve opening signals to control six proportional pressure valves as an example, one analog output component EMAQ04 is connected to the normally open contacts of relays KA1 to KA4, another analog output component EMAQ04 is connected to the normally open contacts of relays KA5 to KA6, and the remaining two interfaces are reserved.

[0123] like Figure 7 The diagram shows the circuit structure connecting the built-in RS485 communication component of the first control unit to six pump pressure gauges and six pipeline pressure gauges. The first control unit uses its built-in RS485 communication component to poll each pump pressure gauge and each pipeline pressure gauge to obtain their respective pressure data. This built-in RS485 communication component is also known as an X20 serial port.

[0124] See Figures 8 to 10When the second control unit (model FX3U) outputs a container start signal to activate the inverter, switch FX3U-1 closes, and the first control unit (model SMART200) receives the container start signal from the second control unit. Conversely, when the second control unit closes, the container start signal disappears, equivalent to receiving a container stop signal. Based on the flow meter data acquired when the container start signal appears and disappears, the first control unit can calculate the amount of paint used for a single container. When the second control unit outputs a spraying start signal to activate the spray gun, switch FX3U-2 closes, and the first control unit receives the spraying start signal from the second control unit. Conversely, when the second control unit closes, the spraying start signal disappears, equivalent to receiving a spraying stop signal. When switch FX3U-3 closes, the first control unit receives the production output signal for the container being sprayed, calculated by the second control unit. Even when the second control unit does not provide a production output signal, by adjusting the built-in program of the first control unit, it can also calculate the production output of the container being sprayed based on the container start / stop signal and the spraying start / stop signal. The first control unit uses a Smart200-S7 chip. The first control unit accepts power from a common terminal of 24V2 and 0V-1.

[0125] Continue reading Figures 8 to 10 When the emergency stop button SB1 is triggered, an emergency stop signal is input to the first control unit. When the automatic reflux start button SB2 is triggered, an automatic reflux start signal is input to the first control unit, serving as a confirmation start signal in automatic reflux mode. When the automatic pump pressure start button SB3 is triggered, an automatic pump pressure start signal is input to the first control unit, serving as a confirmation start signal in automatic pump pressure control mode. When the pressure control manual / automatic knob SB4 is triggered, a manual or automatic pressure control signal is input to the first control unit, used to switch the pump pressure control mode between manual and automatic pressure control modes. When switched to manual pressure control mode, the coils of relays KA1 to KA6 are de-energized. Figure 5 The circuit shown is now connected. At this point, the pressure of each pump can be uniformly adjusted by adjusting potentiometer RP. When switching to automatic pressure control mode, the coils of relays KA1 to KA6 are energized, as shown... Figure 6 When the circuit shown is connected, the automatic pump start button SB3 needs to be triggered again. The first control unit will then automatically adjust the pump pressure within the allowable deviation range of the pump pressure target value based on the preset pump pressure target value and the actual pump pressure value detected by the pump pressure gauge, according to the PID algorithm.

[0126] See also Figures 8 to 10When the manual / automatic return control knob SB5 is triggered, it inputs a manual or automatic return control signal to the first control unit, switching the paint return control mode between manual and automatic return modes. After switching to manual return mode, the six selector switches SB6 to SB11 need to be triggered to independently control the state of each return valve. For example, when selector switch SB6 is triggered to open, then... Figure 9 The coil of relay KA7 in the middle is energized, so that... Figure 10 When the circuit of the first solenoid valve YV1 shown is turned on, the pressure proportional valve 1 switches to the reflux state; conversely, when it is turned off, the pressure proportional valve 1 switches to the spraying state. If the main reflux switch SB12 is triggered to open, then... Figure 9 All coils of relays KA7 to KA12 in the circuit are energized, causing... Figure 10 The circuits of the first solenoid valve YV1 to the sixth solenoid valve YV6 are connected, thereby switching all the pressure proportional valves 1 to 6 to the reflux state; conversely, all the pressure proportional valves 1 to 6 are switched to the spraying state. When switching to automatic reflux mode, the automatic reflux start button SB2 needs to be triggered, so that the first control unit automatically controls the state of each reflux valve according to the number of containers to be sprayed.

[0127] like Figure 9 The indicator light assembly is also shown, namely Figure 1 The indicator light assembly includes a power indicator H1, a return current indicator H2, and an automatic pump pressure indicator H3. When the power supply circuit normally powers the first control unit, the power indicator H1 illuminates; otherwise, it is off. When at least one of the coils of relays KA7 to KA12 is energized, the return current indicator H2 illuminates; otherwise, it is off. When the pressure control manual / automatic knob SB4 is switched to automatic mode and the automatic pump pressure start button SB3 is triggered, the automatic pump pressure indicator H3 illuminates; or, when the pressure control manual / automatic knob SB4 is switched to automatic mode, the automatic pump pressure indicator H3 illuminates.

[0128] like Figure 10 This is a circuit diagram showing the connection between the normally open contacts of six relays KA7 to KA12 and the power supply circuit, and six solenoid valves YV1 to YV6. Each of the six solenoid valves YV1 to YV6 is connected in series with a corresponding normally open contact of relays KA7 to KA12, and... Figure 3 The 24V4 terminal and 0V-2 terminal of the power supply circuit are connected in parallel. When the coil of the corresponding relay is energized, the normally open contact closes, thereby turning on the corresponding solenoid valve and switching the corresponding return valve to the return state; conversely, the corresponding return valve remains in the spraying state.

[0129] like Figure 11This is a circuit diagram showing the connection between the analog input component of the first control unit and the frequency converter. The first control unit obtains the frequency signal fed back from the frequency converter through the analog input module, which helps in calculating the speed of the drive motor and the speed at which the container is transported.

[0130] like Figure 12 (a) to (f) are circuit diagrams of six proportional amplifiers corresponding to six voltage proportional valves. Figure 12 The VO1+ and VO1- terminals of the proportional amplifier VT-1 in (a) are connected to Figure 5 The circuit structure in the diagram connects the VO1+ and VO1- terminals, the 24V3 terminal, and the 0V-2 terminal to... Figure 3 The 24V3 and 0V-2 terminals are connected to the voltage proportional valve for signal output. Figure 12 The VO2+ and VO2- terminals of the proportional amplifier VT-2 in (b) are connected to Figure 5 The circuit structure in the diagram connects the VO2+ and VO2- terminals, the 24V3 terminal, and the 0V-2 terminal to... Figure 3 The 24V3 and 0V-2 terminals are connected to the voltage proportional valve for signal output. Figure 12 The VO3+ and VO3- terminals of the proportional amplifier VT-3 in (c) are connected to Figure 5 The circuit structure in the circuit is connected to the VO3+ and VO3- terminals, the 24V3 terminal and the 0V-2 terminal. Figure 3 The 24V3 and 0V-2 terminals are connected to the voltage proportional valve for signal output. Figure 12 In (d), the VO4+ and VO4- terminals of the proportional amplifier VT-4 are connected to Figure 5 The circuit structure in the diagram connects the VO4+ and VO4- terminals, the 24V3 terminal, and the 0V-2 terminal to... Figure 3 The 24V3 and 0V-2 terminals are connected to the voltage proportional valve for signal output. Figure 12 The VO5+ and VO5- terminals of the proportional amplifier VT-5 in (e) are connected to Figure 5 The circuit structure in the diagram connects the VO5+ and VO5- terminals, the 24V3 terminal, and the 0V-2 terminal to... Figure 3 The 24V3 and 0V-2 terminals are connected to the voltage proportional valve for signal output. Figure 12 The VO6+ and VO6- terminals of the proportional amplifier VT-6 in (f) are connected to Figure 5 The circuit structure in the circuit is connected to the VO6+ and VO6- terminals, the 24V3 terminal and the 0V-2 terminal. Figure 3 The 24V3 and 0V-2 terminals are connected to the voltage proportional valve as signal output terminals. The two ports numbered 22 and 20 of each proportional amplifier are signal output terminals.

[0131] An embodiment of this utility model also provides an automated container painting system. The automated container painting system may include a container painting production line and the aforementioned container painting monitoring system. The container painting production line includes a paint storage container, a hydraulic pump, spray guns, a hydraulic motor, and a hydraulic press. The paint storage container, hydraulic pump, and spray guns are connected sequentially via pipelines. The hydraulic pump pumps paint, such as oil paint, from the paint storage container to the spray guns. With the spray guns open, paint is sprayed from the spray guns to paint the containers located in the paint booth. The hydraulic motor is connected to the hydraulic press via pipelines. The hydraulic press provides hydraulically driven working oil to the hydraulic motor, thereby driving the output shaft of the hydraulic motor to rotate. The hydraulic motor is driven to the hydraulic pump. The output shaft of the hydraulic motor is connected to the input shaft of the hydraulic pump to drive the hydraulic pump.

[0132] According to the embodiments of the present invention, the container automated painting system, by applying the above-mentioned container painting monitoring system, not only makes it easier for users to know the paint flow rate and control the paint flow rate more accurately, thereby saving paint and reducing costs, but also allows the use of a web-based computer and / or server to monitor at least the paint flow rate, which helps to meet more monitoring needs and improve the flexibility of monitoring.

[0133] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of the invention. Terms such as “set” appearing herein can refer to either a component being directly attached to another component or a component being attached to another component via an intermediary. A feature described in one embodiment may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0134] This utility model has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this utility model to the described embodiments. Those skilled in the art will understand that many more variations and modifications can be made based on the teachings of this utility model, and all such variations and modifications fall within the scope of protection claimed by this utility model.

Claims

1. A container painting monitoring system, applied to a container painting production line, the container painting production line comprising a paint storage container, a hydraulic pump, a spray gun, a hydraulic motor, and a hydraulic press, wherein the paint storage container, the hydraulic pump, and the spray gun are sequentially connected via pipelines, the hydraulic motor is connected to the hydraulic press via pipelines, and the hydraulic motor is driven by the hydraulic pump, characterized in that... The container painting monitoring system includes: A flow meter, adapted to be connected in series between the spray gun and the hydraulic pump via a pipeline, to detect the flow rate of the paint; and A first control unit, connected to the flow meter, is configured to receive the flow rate of the paint detected by the flow meter. The container painting monitoring system also includes at least one of a web-based computer and a server, as well as a switch. The web-based computer is connected to the first control unit via the switch to receive at least the paint flow rate detected by the flow meter. The server is connected to the first control unit via the switch to receive at least the paint flow rate detected by the flow meter.

2. The container painting monitoring system according to claim 1, characterized in that, The container painting monitoring system also includes: An electric pressure proportional valve, adapted to be connected in series via a pipeline between the output end of the hydraulic press and the hydraulic motor, the electric pressure proportional valve being electrically connected to the first control unit to regulate the pressure of the hydraulic oil supplied to the hydraulic motor under the control of the first control unit; and A pump pressure gauge is adapted to be connected in series between the electric pressure proportional valve and the hydraulic motor via a pipeline. The pump pressure gauge is electrically connected to the first control unit. The pump pressure gauge is used to detect the pressure of the hydraulic oil supplied to the hydraulic motor and send it to the first control unit so that the first control unit can determine whether the pressure of the hydraulic oil supplied to the hydraulic motor has reached the target oil pressure.

3. The container painting monitoring system according to claim 1 or 2, characterized in that, The container painting monitoring system also includes: A return valve is connected via a pipeline between the hydraulic pump and the spray gun, and between the spray gun and the paint storage container. The return valve has a spraying state and a return state. In the spraying state, the return valve allows paint to flow to the spray gun and prevents paint from flowing to the paint storage container. In the return state, the return valve allows paint to flow to the paint storage container and prevents paint from flowing to the spray gun. A return current switch assembly, which is electrically connected to the first control unit; Air compressor; and A solenoid valve assembly is connected in series with the return valve and the air compressor via a pipeline and is electrically connected to the first control unit. The first control unit controls the opening and closing state of the solenoid valve assembly according to the opening and closing state of the return switch assembly, thereby changing the state of the return valve.

4. The container painting monitoring system according to claim 3, characterized in that, The return switch assembly includes: A return flow mode selection switch, which is electrically connected to the first control unit; and A manual return switch, which is electrically connected to the first control unit. The first control unit selects either a manual return mode or an automatic return mode based on the on / off state of the return mode selection switch. In the manual return mode, the first control unit controls the opening and closing state of the solenoid valve assembly based on the on / off state of the manual return switch. In the automatic return mode, the first control unit controls the opening and closing state of the solenoid valve assembly based on the number of containers to be painted.

5. The container painting monitoring system according to claim 4, characterized in that, The container painting production line includes multiple painting components, each of which includes a hydraulic pump, a spray gun and a hydraulic motor. The container painting monitoring system includes a plurality of backflow valves corresponding to the plurality of painting components; The solenoid valve assembly includes a plurality of solenoid valves corresponding to the plurality of spraying assemblies; The reflux switch assembly includes a plurality of manual reflux sub-switches and / or a manual reflux master switch, wherein the plurality of manual reflux sub-switches and the manual reflux master switch are all electrically connected to the first control unit; The first control unit controls the state of all the solenoid valve assemblies according to the on / off state of the main manual return switch, and controls the state of each solenoid valve according to the on / off state of the plurality of individual manual return switches.

6. The container painting monitoring system according to claim 1 or 2, characterized in that, The container painting production line also includes a conveying device for transporting containers, the conveying device including a drive motor and a frequency converter, the frequency converter being electrically connected to the drive motor; The container painting monitoring system also includes a second control unit, which is adapted to be connected to the frequency converter and is used to send start and stop signals to the frequency converter. The first control unit is connected to the second control unit, and the first control unit is used to determine the amount of paint used in a single container based on the start signal and the stop signal of the second control unit and the paint flow rate detected by the flow meter.

7. The container painting monitoring system according to claim 1 or 2, characterized in that, The container painting monitoring system also includes: A pipe pressure gauge, adapted to be connected in series in the pipe between the hydraulic pump and the spray gun, the pipe pressure gauge being electrically connected to the first control unit for detecting and transmitting to the first control unit the pressure within the pipe between the hydraulic pump and the spray gun; and / or The container painting monitoring system also includes a human-machine interface device, which is electrically connected to the first control unit so as to be able to communicate with the first control unit.

8. The container painting monitoring system according to claim 1, characterized in that, The container painting production line includes multiple painting components, each of which includes a hydraulic pump, a spray gun and a hydraulic motor. The container painting monitoring system includes a plurality of flow meters, each of which is adapted to be installed in a corresponding painting component.

9. The container painting monitoring system according to claim 2, characterized in that, The container painting production line includes multiple painting components, each of which includes a hydraulic pump and a hydraulic motor; The container painting monitoring system includes a plurality of the aforementioned electric pressure proportional valves and a plurality of the aforementioned pump pressure gauges, each of the aforementioned electric pressure proportional valves being adapted to be installed in a corresponding manner in each painting assembly, and each of the aforementioned pump pressure gauges being adapted to be installed in a corresponding manner in each painting assembly.

10. An automated container painting system, characterized in that, The automated container painting system includes: A container painting production line includes a paint storage container, a hydraulic pump, spray guns, a hydraulic motor, and a hydraulic press. The paint storage container, the hydraulic pump, and the spray gun are connected sequentially via pipelines. The hydraulic motor is connected to the hydraulic press via pipelines, and the hydraulic motor is driven by the hydraulic pump. The container painting monitoring system according to any one of claims 1 to 9.

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