CN111974571A - Paint spraying flow control system - Google Patents

Abstract

The invention provides a paint spraying flow control system. The paint spraying flow control system includes a hydraulic pump, a pressure reducing valve, a flow meter and a controller, the hydraulic pump is arranged on the paint passage, and controls the flow rate of the paint according to the pressure of the hydraulic oil flowing into the hydraulic pump, and the pressure reducing valve is fluidly connected to The hydraulic pump is used for controlling the pressure of the hydraulic oil flowing into the hydraulic pump, the flow meter is arranged downstream of the hydraulic pump for detecting the flow rate and the passing quality of the paint discharged from the hydraulic pump, the controller is connected to the flow meter and The pressure reducing valve can receive the flow rate of the paint fed back by the flow meter and can control the pressure reducing valve according to the flow rate. According to the paint spraying flow control system provided by the present invention, the pressure of the paint can be remotely adjusted in real time, the flow rate of the paint can be accurately controlled, the paint material can be saved, the defective products can be reduced, the quality risk can be reduced, and the pipeline blockage, nozzle aging and The abnormal situation of each equipment is monitored and alarmed, and the fault can be found in time.

Description

Paint spray flow control system

technical field

The present invention generally relates to the technical field of spraying equipment, and more particularly to a paint spraying flow control system for containers.

Background technique

As shown in FIG. 1, the existing paint spraying system includes a hydraulic pump 1 and a manual pressure reducing valve 2. The hydraulic oil can flow into the manual pressure reducing valve 2, and the manual pressure reducing valve 2 can adjust the pressure of the hydraulic oil. The hydraulic oil after adjusting the pressure enters into the hydraulic pump 1 to drive the paint, and the paint flows into the hydraulic pump 1 after being pressurized and then flows out. The existing paint spraying system calculates the target pressure through the target flow rate, and then displays the pressure by installing a mechanical pressure gauge 3 at the output rear end of the manual pressure reducing valve 2, and calculates the flow rate by observing the pressure displayed by the mechanical pressure gauge 3, thereby As a result, it is difficult to adjust the pressure of the paint, the calculated flow rate is large, and the control is not timely.

Therefore, there is a need to provide a paint spray flow control system to at least partially solve the above problems.

SUMMARY OF THE INVENTION

In order to at least partially solve the above problems, the present invention provides a paint spraying flow control system, the paint spraying flow control system comprising:

a hydraulic pump, which is arranged on the paint passage and controls the flow rate of the paint according to the pressure of the hydraulic oil flowing into the hydraulic pump;

a pressure reducing valve in fluid communication with the hydraulic pump for controlling the pressure of the hydraulic oil flowing into the hydraulic pump;

a flow meter arranged downstream of the hydraulic pump for detecting the flow rate of the paint discharged from the hydraulic pump; and

and a controller, which is connected to the flow meter and the pressure reducing valve, respectively, to receive the flow rate of the paint fed back by the flow meter and to be able to control the pressure reducing valve according to the flow rate.

According to the paint spraying flow control system provided by the present invention, the pressure of the paint can be remotely adjusted in real time, the real-time performance is improved, the labor intensity is reduced, the flow rate of the paint can be accurately controlled, the paint material is saved, the defective products are reduced, and the quality risk is reduced, and the It can monitor and alarm pipeline blockage, nozzle aging and abnormal conditions of various equipment, and find faults in time.

Optionally, it also includes a pressure sensor, which is arranged between the pressure reducing valve and the hydraulic pump, so as to measure the pressure value of the hydraulic oil output by the pressure reducing valve and detect the pressure value of the hydraulic oil. The pressure value is fed back to the controller.

Optionally, a pressure sensor is also included, the pressure sensor is arranged downstream of the hydraulic pump to measure the pressure value of the paint output by the hydraulic pump and feed back the detected pressure value to the hydraulic pump. described controller.

Optionally, the controller judges the working condition of each device of the paint spraying flow control system according to the proportional relationship K1 of the pressure value P detected by the pressure sensor and the flow velocity V detected by the flowmeter.

Optionally, the paint spraying flow control system further includes:

a spraying device in fluid communication with the hydraulic pump for receiving the paint discharged from the hydraulic pump;

a hydraulic oil feed device in fluid communication with the hydraulic pump for delivering hydraulic oil into the hydraulic pump; and

A paint feeding device in fluid communication with the hydraulic pump for transporting the paint into the hydraulic pump.

Optionally, the paint spraying flow control system further includes a hydraulic oil return device, which is in fluid communication with the hydraulic pump for discharging the hydraulic oil from the hydraulic pump.

Optionally, the flowmeter is a Coriolis mass flowmeter.

Optionally, the paint is a water-based paint.

Optionally, the hydraulic pump is a piston hydraulic pump.

Optionally, the pressure reducing valve is an electronically controlled pressure reducing valve.

Description of drawings

The following drawings are incorporated herein as a part of the invention for understanding the invention. In the attached picture:

FIG. 1 is a flow chart of an existing paint spraying system; and

2 is a flow chart of a paint spraying flow control system according to a preferred embodiment of the present invention.

Description of reference numbers:

1, 11: Hydraulic pump 2: Manual pressure reducing valve

3: Mechanical pressure gauge 12: Pressure reducing valve

13: Pressure sensor 14: Controller

15: Flowmeter

Detailed ways

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without one or more of these details. In other instances, some technical features known in the art have not been described in order to avoid obscuring the present invention.

The invention provides a paint spraying flow control system, which can effectively and timely adjust the flow rate of the sprayed paint. Specifically, as shown in FIG. 2 , the paint spraying flow control system includes a hydraulic pump 11 , which is arranged on the paint passage and controls the flow rate of paint according to the pressure of the hydraulic oil flowing into the hydraulic pump. Optionally, the paint spraying flow control system may further include a spraying device (not shown), a hydraulic oil feeding device (not shown) and a paint feeding device (not shown). The spraying equipment and the hydraulic pump 11 can be in fluid communication through pipelines, the hydraulic pump 11 and the hydraulic oil feeding device can be in fluid communication through pipelines, and the paint feeding device and the hydraulic pump 11 can be in fluid communication through pipelines.

The hydraulic pump 11 may be a piston hydraulic pump, so that the paint can be stably discharged. A hydraulic power source provides hydraulic oil, such as a hydraulic oil feeding device may be in fluid communication with the hydraulic pump 11 for delivering hydraulic oil into the hydraulic pump 11 . The hydraulic pump 11 may include two inlets, and one of the two inlets of the hydraulic pump 11 may be in fluid communication with the outlet of the hydraulic oil feeding device.

The paint feeding device is in fluid communication with the hydraulic pump 11 for delivering paint into the hydraulic pump 11 . The paint stored in the paint feeding equipment can be paint or water-based paint, so as to adapt to a variety of situations. The other of the two inlets of the hydraulic pump 11 may be in fluid communication with the outlet of the paint feeding device. The hydraulic oil enters the hydraulic pump 11 to work, and the paint can flow into the hydraulic pump 11 after being pressurized and then flow out.

Hydraulic pump 11 may include an outlet that is in fluid communication with the inlet of the spraying device so that the spraying device is in fluid communication with hydraulic pump 11 so that the spraying device is adapted to receive paint discharged from hydraulic pump 11 . The paint flows into the hydraulic pump 11, and after being pressurized by the hydraulic pump 11, the paint can be output to the spraying equipment. The spraying equipment can include a spray gun, for example, the spray gun can be an electrostatic spray gun, the paint transfer efficiency and atomization quality are high, and it is very easy to spray multiple surfaces.

In order to make the paint spray evenly, the paint spray flow control system includes a pressure reducing valve 12 which is fluidly connected to the hydraulic pump 11 for controlling the pressure of the hydraulic oil flowing into the hydraulic pump 11 . Preferably, the pressure reducing valve 12 is arranged between the hydraulic oil feeding device and the hydraulic pump 11, and the inlet of the pressure reducing valve 12 can be in fluid communication with the outlet of the hydraulic oil feeding device, so that the hydraulic oil output by the hydraulic oil feeding device enters the reducing pressure valve 12. The pressure reducing valve 12 can adjust the pressure of the hydraulic oil output by the hydraulic oil feeding device to a predetermined pressure. The outlet of the pressure reducing valve 12 can be in fluid communication with the inlet of the hydraulic pump 11, so that the hydraulic oil adjusted to a predetermined pressure can enter the hydraulic pump 11 to work, so as to adjust the pressure of the paint in the hydraulic pump 11, and then adjust the flow rate of the paint .

Preferably, in order to enable the pressure reducing valve 12 to effectively control the pressure of the hydraulic oil, the pressure reducing valve 12 may be a proportional pressure reducing valve, so that the pressure of the hydraulic oil can be uniformly reduced and safety is improved.

In order to accurately control the pressure reducing valve 12 , the paint spraying flow control system further includes a controller 14 , and the controller 14 can control the pressure reducing valve 12 . The controller 14 can use a PLC (Programmable Logic Controller, programmable logic controller), which can be controlled and adjusted by a single-chip microcomputer module, and an operator can remotely control it through a computer. Preferably, the pressure reducing valve 12 can be an electronically controlled pressure reducing valve, and the pressure reducing valve 12 can be electrically connected to the controller 14. In this way, when the pressure reducing valve 12 is adjusted, the pressure reducing valve 12 can be remotely adjusted in real time, and the adjustment is simple. There is no need for manual adjustment on site, which improves real-time performance and reduces workload. The pressure reducing valve 12 can also be an electric piston pressure reducing valve or an electric diaphragm pressure reducing valve, so as to ensure the stability of the pressure of the hydraulic oil.

Further, the paint spraying flow control system may further include a flow meter 15 arranged downstream of the hydraulic pump 11 for detecting the flow rate of paint discharged from the hydraulic pump. In this embodiment, "downstream" refers to the "downstream" of the hydraulic pump in the paint passage. Preferably, the flow meter 15 is arranged between the hydraulic pump 11 and the spraying equipment, so that the flow meter 15 can detect the actual flow rate of the paint output by the hydraulic pump 11 . The controller 14 is respectively connected to the flow meter 15 and the pressure reducing valve 12. The flow meter 15 can be electrically connected to the controller 14, so that the flow meter 15 can feed back the detected flow rate of the paint to the controller 14, so as to accurately control the The flow rate of the paint. The controller 14 can receive the flow rate of the paint fed back by the flow meter 15 and can control the pressure reducing valve 12 according to the flow rate. The controller 14 can adjust the pressure of the paint in time by controlling the pressure of the pressure reducing valve 12 according to the comparison between the actual flow rate of the detected paint and the target flow rate, thereby adjusting the flow rate of the paint, so that the flow rate of the paint reaches the set constant flow speed, Ensure that the paint is sprayed evenly.

Optionally, since the paint is easily attached to the pipe wall, in order to prevent the flowmeter 15 from being blocked, the flowmeter 15 may be a Coriolis mass flowmeter, so as to avoid a larger measurement error caused by the flowmeter 15 being used for a long time.

Further, since the flow rate of the paint is related to factors such as the pressure of the paint, the smoothness of the pipeline and the viscosity of the paint, the paint spraying flow control system can also include a pressure sensor 13, and the pressure sensor 13 is arranged between the pressure reducing valve 12 and the hydraulic pump 11. During this time, the pressure value of the hydraulic oil output by the pressure reducing valve 12 is measured and the detected pressure value is fed back to the controller 14 . In this way, it can be detected whether the pressure value of the hydraulic oil adjusted by the pressure reducing valve 12 and the target pressure value are correct, so as to find out the abnormal situation in time.

In the embodiment not shown, the pressure sensor may also be arranged downstream of the hydraulic pump for measuring the pressure value of the paint output by the hydraulic pump and feeding back the detected pressure value to the controller. In this way, it can be detected whether the pressure value of the paint discharged by the hydraulic pump and the target pressure value are correct, so as to find out the abnormal situation of the work in time.

The controller 14 can judge the working condition of each device of the paint spraying flow control system according to the proportional relationship K1 of the pressure value P detected by the pressure sensor and the flow velocity V detected by the flow meter 15 . The pressure value detected by the pressure sensor may be the detected pressure value of the hydraulic oil or the detected pressure value of the paint, so that the flow rate of the paint can be accurately controlled. For example, it can judge the wear of the nozzles of the spraying equipment and the smoothness of the pipelines of the paint spraying flow control system, and find out whether there is any abnormality in the work of the equipment in time.

In order to improve the use efficiency of the hydraulic oil, the paint spraying flow control system also includes a hydraulic oil return device (not shown), and the hydraulic oil return device is in fluid communication with the hydraulic pump 11 , for example, a pipeline fluid is passed between the hydraulic oil return device and the hydraulic pump 11 . Communication is used to discharge hydraulic oil from the hydraulic pump 11 .

According to the paint spraying flow control system provided by the present invention, the pressure of the paint can be remotely adjusted in real time, the real-time performance is improved, the labor intensity is reduced, the flow rate of the paint can be accurately controlled, the paint material is saved, the defective products are reduced, and the quality risk is reduced, and the It can monitor and alarm pipeline blockage, nozzle aging and abnormal conditions of various equipment, and find faults in time.

The present invention has been described by the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of illustration and description, and are not intended to limit the present invention to the scope of the described embodiments. It will be appreciated by those skilled in the art that various variations and modifications can be made according to the teachings of the present invention, which all fall within the scope of the claimed protection of the present invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (10)

1. a paint spraying flow control system, is characterized in that, described paint spraying flow control system comprises: a hydraulic pump, which is arranged on the paint passage and controls the flow rate of the paint according to the pressure of the hydraulic oil flowing into the hydraulic pump; a pressure reducing valve in fluid communication with the hydraulic pump for controlling the pressure of the hydraulic oil flowing into the hydraulic pump; a flow meter arranged downstream of the hydraulic pump for detecting the flow rate of the paint discharged from the hydraulic pump; and and a controller, which is respectively connected to the flow meter and the pressure reducing valve to receive the flow rate of the paint fed back by the flow meter and to be able to control the pressure reducing valve according to the flow rate. 2 . The paint spraying flow control system according to claim 1 , further comprising a pressure sensor arranged between the pressure reducing valve and the hydraulic pump for measuring the pressure reduction. 3 . The pressure value of the hydraulic oil output by the pressure valve is fed back to the controller. 3. The paint spraying flow control system according to claim 1, further comprising a pressure sensor arranged downstream of the hydraulic pump to measure the paint output by the hydraulic pump and feedback the detected pressure value to the controller. 4. The paint spraying flow control system according to claim 2 or 3, wherein the controller is based on the proportional relationship K1 of the pressure value P detected by the pressure sensor and the flow velocity V detected by the flowmeter The working conditions of each device of the paint spraying flow control system are judged. 5. The paint spraying flow control system according to claim 1, wherein the paint spraying flow control system further comprises: a spraying device in fluid communication with the hydraulic pump for receiving the paint discharged from the hydraulic pump; a hydraulic oil feed device in fluid communication with the hydraulic pump for delivering hydraulic oil into the hydraulic pump; and A paint feeding device in fluid communication with the hydraulic pump for transporting the paint into the hydraulic pump. 6. The paint spraying flow control system according to claim 1, wherein the paint spraying flow control system further comprises a hydraulic oil return device, the hydraulic oil return device is in fluid communication with the hydraulic pump, and is used to The hydraulic oil is discharged from the hydraulic pump. 7. The paint spraying flow control system according to claim 1, wherein the flowmeter is a Coriolis mass flowmeter. 8. The paint spraying flow control system according to claim 1, wherein the paint is a water-based paint. 9 . The paint spraying flow control system according to claim 1 , wherein the hydraulic pump is a piston hydraulic pump. 10 . 10 . The paint spraying flow control system according to claim 1 , wherein the pressure reducing valve is an electronically controlled pressure reducing valve. 11 .

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