A water washing device

Abstract

The utility model relates to a kind of washing device, including washing unit, it includes water inlet and water outlet, and the water-washed piece is placed in the washing unit;Steady flow unit, it is installed in the water inlet, the steady flow unit includes first pipe line assembly and second pipe line assembly, the first pipe line assembly includes first water inlet pipe and first valve body, first valve body is set in the first water inlet pipe, one end of first water inlet pipe is connected with water supply end, the other end of first water inlet pipe is connected with water inlet;Second pipe line assembly includes second water inlet pipe, second valve body and third valve body, second water inlet pipe is communicated with first water inlet pipe, two ends of second water inlet pipe are located at the two sides of first valve body respectively;Second valve body and the third valve body are sequentially set in the second water inlet pipe along liquid inlet direction.The utility model can maintain stable water intake and clean tank environment, avoid water supply pressure fluctuation, to guarantee the stability of PCB washing quality, and then ensure the quality and reliability of product.

Description

Technical Field

[0001] This utility model relates to the field of circuit board processing technology, and in particular to a water washing device. Background Technology

[0002] In the manufacturing process of printed circuit boards (PCBs), horizontal wet processes (such as developing, etching, stripping, browning, chemical copper plating, electroplating, etc.) are a series of crucial steps. These processes typically involve a large amount of chemical treatment, which must be followed by an efficient and thorough water rinsing step to terminate the chemical reaction and remove residual chemicals and reaction byproducts from the board surface and holes. The cleanliness and stability of the rinsing tank directly determine the final quality of the PCB product. An ideal rinsing process requires a continuous supply of sufficient clean room-temperature water, with contaminants constantly being carried out of the tank through overflow, thereby maintaining the purity of the water quality. If the rinsing effect is poor, residual ions, organic matter, or chemicals can cause a series of serious quality defects, such as: oxidation and discoloration of the PCB surface, where residual etching solution or oxidizing substances on the copper surface can cause uneven oxidation, resulting in surface discoloration or spots, seriously affecting the appearance and adhesion of subsequent processing; and dirt inside the holes, as the through-holes and blind / buried vias of PCBs are small and have a large depth-to-width ratio, making rinsing difficult. Dirt residue can clog the hole walls, leading to poor subsequent electroplating, and even causing open circuits or decreased reliability within the holes. Furthermore, unwashed reactive ions (such as halide ions and sulfate ions) can migrate and corrode under high temperatures or electrical conditions, causing potential failure risks such as decreased insulation resistance, leakage, or even short circuits. Currently, most existing technologies use a central water supply system to centrally supply cleaning water to the entire production line or multiple washing tanks.

[0003] However, existing technologies have shortcomings. Current water supply methods lead to unstable water pressure. Intermittent, high-flow-rate water usage from other workstations on the production line (such as replenishment of other washing tanks and overflow from chemical tanks) causes pressure fluctuations in the central water supply network. These fluctuations negatively impact washing tanks that rely on stable overflow: when water pressure is too low, the inflow is insufficient, failing to create effective overflow and displacement, leading to a continuous accumulation of contaminants in the tank and a sharp decline in washing efficiency—essentially washing products with dirty water. When water pressure is too high, although the flow rate increases, it may cause turbulent flow within the tank, resulting in collisions between workpieces or water splashing, which is also detrimental to stable production. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a flow stabilizing device and water washing equipment, which can maintain a stable water inflow and a clean tank environment, avoid fluctuations in water supply pressure, thereby ensuring the stability of PCB water washing quality and thus ensuring the quality and reliability of the product.

[0005] To solve the above-mentioned technical problems, this utility model provides a water washing device, including, A water washing unit, which includes a water inlet and a water outlet, is used to place the parts to be washed. A flow stabilizing unit is installed at the water inlet. The flow stabilizing unit includes a first pipeline assembly and a second pipeline assembly. The first pipeline assembly includes a first inlet pipe and a first valve body. The first valve body is disposed on the first inlet pipe. One end of the first inlet pipe is connected to the water supply end, and the other end of the first inlet pipe is connected to the water inlet. The second pipeline assembly includes a second inlet pipe, a second valve body, and a third valve body. The second inlet pipe communicates with the first inlet pipe, and both ends of the second inlet pipe are located on both sides of the first valve body. The second valve body and the third valve body are sequentially disposed on the second inlet pipe along the liquid inlet direction. A flow detection unit is disposed in the first water inlet pipe, and the flow detection unit is located between the first valve body and the water inlet to detect the flow rate of liquid entering the water washing unit; The control unit is connected to the current stabilization unit and the flow detection unit. It acquires the flow detection signal through the flow detection unit and outputs a control signal to the current stabilization unit.

[0006] In one embodiment of this utility model, the flow detection unit includes a rotor flow meter.

[0007] In one embodiment of the present invention, the first valve body includes a first manual ball valve.

[0008] In one embodiment of the present invention, the second valve body includes a second manual ball valve.

[0009] In one embodiment of this utility model, the third valve body includes an electric ball valve.

[0010] In one embodiment of this utility model, the water outlet is equipped with a water outlet pipe, a switch valve, and a drain pump, with the switch valve and the drain pump sequentially installed on the water outlet pipe.

[0011] In one embodiment of this utility model, the water washing unit includes a first water tank and a second water tank, the first water tank and the second water tank are connected, and the water inlet and the water outlet are disposed in the second water tank.

[0012] In one embodiment of this utility model, the water inlet is provided with a guide pipe, the guide pipe extends in the second water tank, and the end of the guide pipe faces the water outlet.

[0013] In one embodiment of the present invention, the washing unit further includes a fixing component, which is installed in the first water tank to fix the part to be washed.

[0014] In one embodiment of the present invention, the water washing unit further includes a spraying component, which is installed in the first water tank and is positioned toward the part to be washed.

[0015] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art: The water washing device described in this utility model includes a water washing unit, a pressure stabilizing unit, a flow detection unit, and a control unit. The part to be washed is placed in the water washing unit for washing. The pressure stabilizing unit, the flow detection unit, and the control unit cooperate with each other to monitor and control the water flow rate of the water washing unit in real time, maintain a stable water volume, ensure the stability of the water pressure in the water washing unit, and thus ensure the cleanliness of the water washing unit to a certain extent, avoid fluctuations in water supply pressure, thereby ensuring the stability and consistency of PCB water washing quality, and further improving the stability and reliability of subsequent product quality. Attached Figure Description

[0016] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of the present invention.

[0018] Figure 2 This is a schematic diagram of the voltage stabilizing unit and flow detection unit of a preferred embodiment of this utility model.

[0019] Explanation of reference numerals in the accompanying drawings: 10. Inlet; 11. Outlet; 12. First water tank; 13. Second water tank; 14. Guide pipe; 15. Fixing assembly; 21. First inlet pipe; 22. First valve body; 23. Second inlet pipe; 24. Second valve body; 25. Third valve body; 3. Flow detection unit; 4. Support frame. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0021] Reference Figures 1 to 2As shown, this utility model discloses a water washing device, including a water washing unit. The water washing unit includes a water inlet 10 and a water outlet 11. The part to be washed is placed in the water washing unit and the water washing is completed in the water washing unit. In this embodiment, the part to be washed is a PCB. Of course, in some other embodiments, the part to be washed can also be other products.

[0022] The water washing device also includes a flow stabilizing unit, which is installed at the water inlet 10. The flow stabilizing unit includes a first pipeline assembly and a second pipeline assembly.

[0023] Specifically, the first pipeline assembly includes a first inlet pipe 21 and a first valve body 22. The first valve body 22 is disposed on the first inlet pipe 21. One end of the first inlet pipe 21 is connected to the water supply end to obtain water supply, and the other end of the first inlet pipe 21 is connected to the water inlet 10. It should be noted that under normal working conditions, the first valve body 22 is normally closed and will only be opened when manual water replenishment is required.

[0024] The second pipeline assembly includes a second inlet pipe 23, a second valve body 24 and a third valve body 25. The second inlet pipe 23 is connected to the first inlet pipe 21, and the two ends of the second inlet pipe 23 are respectively connected to the two sides of the first valve body 22. The second valve body 24 and the third valve body 25 are sequentially arranged in the second water inlet pipe 23 along the liquid inlet direction. It should be noted that under normal working conditions, the second valve body 24 is normally open. When the third valve body 25 malfunctions and needs to be replaced, the second valve body 24 is controlled to close.

[0025] The water washing device also includes a flow detection unit 3, which is disposed in the first water inlet pipe 21 and between the first valve body 22 and the water inlet 10, to monitor the real-time flow rate at the water inlet 10. The washing device also includes a control unit, which is connected to the flow stabilizing unit and the flow detection unit 3. Thus, the control unit obtains the flow detection signal through the flow detection unit 3 and outputs a control signal to the flow stabilizing unit to control the opening and closing of the flow stabilizing unit.

[0026] In a preferred embodiment, the control unit includes, but is not limited to, a PLC. In this embodiment, the control unit is a PLC (Programmable Logic Controller).

[0027] During operation, the inlet water flow rate is preset in the PLC. The instantaneous inlet water flow rate is monitored by the flow control unit 3, and an analog signal is sent to the PLC for real-time monitoring. When the inlet water flow rate fluctuates, the PLC provides a frequency conversion signal to control the third valve body 25 of the pressure stabilizing unit to operate, thereby controlling the inlet water flow rate and achieving stability of the inlet water flow rate.

[0028] Therefore, it can be understood that the water washing device to be protected by this utility model is provided with a water washing unit, a pressure stabilizing unit, a flow detection unit, and a control unit. The part to be washed is placed in the water washing unit for washing. The pressure stabilizing unit, the flow detection unit, and the control unit cooperate with each other to monitor and control the water flow of the water washing unit in real time, maintain a stable water flow, ensure the stability of the water pressure in the water washing unit, and thus ensure the cleanliness of the water washing unit to a certain extent, avoid fluctuations in water supply pressure, thereby ensuring the stability and consistency of PCB water washing quality, and further improving the stability and reliability of subsequent product quality.

[0029] In a preferred embodiment, the flow control unit 3 includes a turbine rotor flow meter. Structurally and in principle, the turbine rotor flow meter includes a rotor, a magnet, and an induction coil. When water or other fluids flow through the flow meter, they impact the rotor blades, causing it to rotate. The rotor's rotational speed is directly proportional to the fluid's flow velocity; the faster the flow velocity, the faster the rotor rotates. Each time the rotor rotates once, the magnet on it approaches the external induction coil, changing the magnetic field inside the coil. According to the principle of electromagnetic induction, the changing magnetic field generates pulsed electrical signals in the coil. By measuring the pulse frequency generated per unit time, the instantaneous flow rate of the fluid can be calculated. Therefore, the turbine rotor flow meter has advantages such as high precision, good repeatability, fast response, and compact structure.

[0030] Of course, in some other embodiments, the flow control unit 3 may also employ other flow monitoring devices.

[0031] Furthermore, the first valve body 22 includes a first manual ball valve. The first manual ball valve is normally closed, meaning that under normal conditions, the medium cannot flow through the first manual ball valve. When the system needs to be replenished with water, the first manual ball valve is manually opened to perform the water replenishment operation.

[0032] Furthermore, the second valve body 24 includes a second manual ball valve. The second manual ball valve is normally open, meaning that under normal conditions, it allows media flow and is open by default. When the third valve body 25 or other structures within the system malfunction and require inspection or maintenance, the second manual ball valve is closed to facilitate maintenance operations.

[0033] In a preferred embodiment, the third valve body 25 includes an intelligent electric ball valve, which can automatically adjust the inlet water flow rate according to a control signal.

[0034] Specifically, the washing unit includes a first water tank 12 and a second water tank 13, the first water tank 12 and the second water tank 13 are connected, and the water inlet 10 and the water outlet 11 are disposed in the second water tank.

[0035] In detail, the water inlet 10 is located on the side wall of the first water tank 12, and the water outlet 11 is located at the bottom of the first water tank 12.

[0036] Preferably, the inlet 10 is further provided with a guide pipe 14, which extends within the second water tank 13; the end of the guide pipe 14 faces the outlet 11.

[0037] The washing unit further includes a fixing component 15, which is installed on the first water tank 12 to fix the part to be washed. Preferably, the fixing component includes a clamping member that can clamp and fix the part to be washed.

[0038] In a preferred embodiment, the washing unit further includes a spraying assembly installed within the first water tank 12 and oriented towards the part to be washed. Specifically, the spraying assembly includes two sets of nozzles arranged opposite each other along the height direction, thereby enabling thorough spraying and rinsing of the part to be washed, improving washing efficiency and quality.

[0039] In a preferred embodiment, the outlet 11 is also provided with an outlet pipe, a switch valve, and a drain pump. The switch valve and the drain pump are installed sequentially on the outlet pipe. This arrangement enables the wastewater after washing to be discharged quickly, ensuring the stability of the washing efficiency.

[0040] In detail, the washing device also includes a support frame 4, on which the washing unit is installed for stable support.

[0041] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0042] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0043] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A water washing device, characterized in that: include, A water washing unit, which includes a water inlet and a water outlet, is used to place the parts to be washed. A flow stabilizing unit is installed at the water inlet. The flow stabilizing unit includes a first pipeline assembly and a second pipeline assembly. The first pipeline assembly includes a first inlet pipe and a first valve body. The first valve body is disposed on the first inlet pipe. One end of the first inlet pipe is connected to the water supply end, and the other end of the first inlet pipe is connected to the water inlet. The second pipeline assembly includes a second inlet pipe, a second valve body, and a third valve body. The second inlet pipe communicates with the first inlet pipe, and both ends of the second inlet pipe are located on both sides of the first valve body. The second valve body and the third valve body are sequentially disposed on the second inlet pipe along the liquid inlet direction. A flow detection unit is disposed in the first water inlet pipe, and the flow detection unit is located between the first valve body and the water inlet to detect the flow rate of liquid entering the water washing unit; The control unit is connected to the current stabilization unit and the flow detection unit. It acquires the flow detection signal through the flow detection unit and outputs a control signal to the current stabilization unit.

2. A water washing apparatus according to claim 1, characterized in that: The flow detection unit includes a rotor flow meter.

3. The water washing device according to claim 1, characterized in that: The first valve body includes a first manual ball valve.

4. The water washing device according to claim 1, characterized in that: The second valve body includes a second manual ball valve.

5. A water washing device according to claim 1, characterized in that: The third valve body includes an electric ball valve.

6. A water washing device according to claim 1, characterized in that: The outlet is equipped with an outlet pipe, a switch valve, and a drain pump, with the switch valve and the drain pump installed sequentially on the outlet pipe.

7. A water washing apparatus according to claim 1, characterized in that: The washing unit includes a first water tank and a second water tank, the first water tank and the second water tank are connected, and the water inlet and the water outlet are located in the second water tank.

8. A water washing device according to claim 7, characterized in that: The inlet is equipped with a guide pipe that extends within the second water tank, with the end of the guide pipe facing the outlet.

9. A water washing device according to claim 7, characterized in that: The washing unit also includes a fixing component, which is installed in the first water tank to fix the item to be washed.

10. A water washing apparatus according to claim 7, characterized in that: The washing unit also includes a spraying component, which is installed in the first water tank and is positioned toward the part to be washed.

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