A device for accurately controlling the flow of a chemical palladium cylinder

Abstract

The utility model discloses a kind of device of accurate control of chemical palladium jar flow, including pump, filter, output pipeline, reflux pipeline, frequency converter, PLC and ultrasonic flowmeter;The input end of the filter is communicated with the output end of pump;The input end of the output pipeline is inserted into chemical palladium jar;By cooperation setting frequency converter, PLC and ultrasonic flowmeter, the flow of reflux pipeline is measured using ultrasonic flowmeter, and flow value is converted into digital signal to PLC, after comparison after PLC digital signal processing, the frequency signal of output is given to frequency converter, then by frequency converter, the current of corresponding ac frequency is converted to pump, pump is according to the speed output suitable flow of frequency change, to realize accurate, automation control to chemical palladium jar pipeline flow, to ensure the uniformity and stability of chemical palladium deposition thickness in chemical palladium jar, reduce quality risk, can save cost, and improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the technology in the field of ceramic substrate production and manufacturing, and in particular to a device for precise control of the flow rate of a chemical palladium cylinder. Background Technology

[0002] Ceramic substrates are inorganic non-metallic material substrates used in electronic devices. They primarily serve as supports, connections, and heat dissipation carriers for electronic components and are widely used in electronic circuits requiring high frequency, high power, high temperature, or high reliability. They are manufactured by processing ceramic material into thin sheets (typically 0.1–1.0 mm thick) and fabricating conductive lines, pads, or other functional structures on or inside the sheet to achieve electrical connections and mechanical fixation of electronic components.

[0003] Currently, the electroless nickel-palladium-gold process is used in the production of ceramic substrates. The flow rate of the electroless palladium cylinder circulation significantly affects the deposition quality. Currently, a pump + pipeline + filter system is mainly used for circulation and agitation. However, during production, factors such as filter element blockage and loose pipeline valves can cause significant variations in the pipeline flow rate. These variations affect the uniformity of the electroless palladium deposition thickness, and in severe cases, can lead to localized missed plating of the electroless palladium layer on the ceramic substrate, resulting in serious quality issues. Therefore, it is necessary to research a solution to address these problems. Utility Model Content

[0004] In view of this, the present invention addresses the deficiencies of the existing technology and its main purpose is to provide a device for precise control of the flow rate of a chemical palladium cylinder, which can effectively solve the problems of uncontrollable chemical palladium thickness, poor uniformity, and incomplete plating in existing chemical palladium cylinders during production.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A device for precise flow control of a palladium chemical tank includes a pump, a filter, an output pipe, a return pipe, a frequency converter, a PLC, and an ultrasonic flow meter. The input end of the filter is connected to the output end of the pump. The input end of the output pipe extends into the palladium chemical tank and is connected to the input end of the pump. The input end of the return pipe is connected to the filtrate output end of the filter, and the output end of the return pipe extends into the palladium chemical tank and is away from the input end of the output pipe. The frequency converter is electrically connected to the motor of the pump. The PLC is electrically connected to the frequency converter. The ultrasonic flow meter is installed on the return pipe and measures the flow rate of the return pipe. The ultrasonic flow meter is electrically connected to the PLC.

[0007] As a preferred embodiment, the pump, filter, frequency converter, PLC, and ultrasonic flow meter are all located outside the chemical palladium cylinder.

[0008] As a preferred embodiment, the ultrasonic flow meter is an external cassette ultrasonic flow meter.

[0009] As a preferred embodiment, the output pipe has a first vertical section that extends vertically into the palladium chemical cylinder, and the input end of the output pipe is located at the lower end of the first vertical section and near the bottom of the palladium chemical cylinder on one side; the return pipe has a second vertical section and a horizontal section connected in sequence, the second vertical section extending vertically into the palladium chemical cylinder and located beside the first vertical section, the horizontal section extending horizontally and located at the bottom of the palladium chemical cylinder, and the output end of the return pipe is located at the tail end of the horizontal section and near the bottom of the palladium chemical cylinder on the other side.

[0010] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution:

[0011] By combining a frequency converter, PLC, and ultrasonic flow meter, the flow rate in the return pipe is measured by the ultrasonic flow meter, and the flow rate value is converted into a digital signal and sent to the PLC. After processing and comparing the digital signal, the PLC outputs a suitable frequency signal to the frequency converter, which then converts the frequency signal into a current of the corresponding AC frequency and sends it to the pump. The pump changes its speed according to the frequency and outputs a suitable flow rate, thereby achieving precise and automated control of the flow rate in the chemical palladium cylinder pipeline. This ensures the uniformity and stability of the chemical palladium deposition thickness in the chemical palladium cylinder, reduces quality risks, saves costs, and improves production efficiency.

[0012] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention.

[0014] Explanation of reference numerals in the attached diagram:

[0015] 10. Pump 11. Motor

[0016] 20. Filter; 30. Output pipe

[0017] 31. First vertical section; 40. Return pipe

[0018] 41. Second vertical segment 42. Horizontal segment

[0019] 50. Frequency converter; 60. PLC

[0020] 70. Ultrasonic flow meter; 80. Chemical palladium cylinder

[0021] 90. Control valve. Detailed Implementation

[0022] Please refer to Figure 1 As shown, it illustrates the specific structure of a preferred embodiment of the present invention, including a pump 10, a filter 20, an output pipe 30, a return pipe 40, a frequency converter 50, a PLC 60, and an ultrasonic flow meter 70.

[0023] The pump 10 is located outside the chemical palladium cylinder 80 and has a motor 11.

[0024] The input end of the filter 20 is connected to the output end of the pump 10; in this embodiment, the filter 20 is located outside the chemical palladium cylinder 80.

[0025] The input end of the output pipe 30 extends into the chemical palladium cylinder 80, and the output end of the output pipe 30 is connected to the input end of the pump 10. In this embodiment, the output pipe 30 has a first vertical section 31, which extends vertically into the chemical palladium cylinder 80. The input end of the output pipe 30 is located at the lower end of the first vertical section 31 and is close to the bottom of the chemical palladium cylinder 80.

[0026] The inlet of the reflux pipe 40 is connected to the filtrate outlet of the filter 20, and the outlet of the reflux pipe 40 extends into the palladium tank 80 and is located away from the inlet of the outlet pipe 30. In this embodiment, the reflux pipe 40 has a second vertical section 41 and a horizontal section 42 connected in sequence. The second vertical section 41 extends vertically into the palladium tank 80 and is located beside the first vertical section 31. The horizontal section 42 extends horizontally and is located at the inner bottom of the palladium tank 80. The outlet of the reflux pipe 40 is located at the tail end of the horizontal section 42 and is close to the other side of the inner bottom of the palladium tank 80.

[0027] The frequency converter 50 is electrically connected to the motor 11 of the pump 10. In this embodiment, the frequency converter 50 is located outside the chemical palladium cylinder 80.

[0028] The PLC 60 is electrically connected to the frequency converter 50. In this embodiment, the PLC 60 is located outside the chemical palladium cylinder 80.

[0029] The ultrasonic flow meter 70 is installed on the return pipe 40 and measures the flow rate of the return pipe 40. The ultrasonic flow meter 70 is electrically connected to the PLC 60. In this embodiment, the ultrasonic flow meter 70 is located outside the chemical palladium cylinder 80, and the ultrasonic flow meter 70 is an external clamping ultrasonic flow meter, which is convenient to install and remove.

[0030] In addition, a control valve 90 is provided on the output pipe 30, which is located outside the chemical palladium cylinder 80.

[0031] The working principle of this embodiment is explained in detail below:

[0032] During operation, when the motor 11 of the pump 10 is powered on, the pump 10 draws out the chemical palladium bath liquid from the chemical palladium tank 80 through the output pipe 30. Then, the chemical palladium bath liquid is filtered by the filter 20 and enters the chemical palladium tank 80 through the return pipe 40, thus forming a complete chemical palladium tank circulation system.

[0033] The ultrasonic flow meter 70 is installed on the return pipe 40. The ultrasonic flow meter 70 measures the flow rate in the return pipe 40 in real time and outputs the flow information to the PLC 60. Then, the PLC 60 compares the flow information with the set information (set value) and outputs a frequency signal to the frequency converter 50. The frequency converter 50 converts the frequency signal into the frequency of the AC power. Then, the motor 11 of the pump 10 changes its speed according to the frequency of the AC power, so that the pump 10 outputs a suitable flow rate.

[0034] The key design feature of this invention is that by combining a frequency converter, a PLC, and an ultrasonic flow meter, the flow rate in the return pipe is measured by the ultrasonic flow meter, and the flow rate value is converted into a digital signal and sent to the PLC. After processing and comparing the digital signal, the PLC outputs a suitable frequency signal to the frequency converter, which then converts the frequency signal into a current of the corresponding AC frequency and sends it to the pump. The pump changes its speed according to the frequency and outputs a suitable flow rate, thereby achieving precise and automated control of the flow rate in the chemical palladium cylinder pipeline. This ensures the uniformity and stability of the chemical palladium deposition thickness in the chemical palladium cylinder, reduces quality risks, saves costs, and improves production efficiency.

[0035] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A device for precise flow control of a chemical palladium cylinder, characterized in that: The system includes a pump, a filter, an output pipe, a return pipe, a frequency converter, a PLC, and an ultrasonic flow meter. The input end of the filter is connected to the output end of the pump. The input end of the output pipe extends into a chemical palladium cylinder, and the output end of the output pipe is connected to the input end of the pump. The input end of the return pipe is connected to the filtrate output end of the filter, and the output end of the return pipe extends into the chemical palladium cylinder and is located away from the input end of the output pipe. The frequency converter is electrically connected to the pump motor. The PLC is electrically connected to the frequency converter. The ultrasonic flow meter is installed on the return pipe and measures the flow rate of the return pipe. The ultrasonic flow meter is electrically connected to the PLC.

2. The device for precise flow control of a chemical palladium cylinder according to claim 1, characterized in that: The pump, filter, frequency converter, PLC and ultrasonic flow meter are all located outside the chemical palladium cylinder.

3. The device for precise flow control of a chemical palladium cylinder according to claim 1, characterized in that: The ultrasonic flow meter is an external cassette ultrasonic flow meter.

4. The device for precise flow control of a chemical palladium cylinder according to claim 1, characterized in that: The output pipe has a first vertical section that extends vertically into the palladium chemical cylinder. The input end of the output pipe is located at the lower end of the first vertical section and near the bottom of the palladium chemical cylinder. The return pipe has a second vertical section and a horizontal section connected in sequence. The second vertical section extends vertically into the palladium chemical cylinder and is located beside the first vertical section. The horizontal section extends horizontally and is located at the bottom of the palladium chemical cylinder. The output end of the return pipe is located at the end of the horizontal section and near the bottom of the palladium chemical cylinder.

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