Automatic liquid medicine adding device for circuit board processing

Abstract

The utility model discloses an automatic liquid medicine adding device for circuit board processing, which belongs to the technical field of circuit board processing and comprises an adjusting tank and a circulating pump which are arranged on one side of an etching tank, the lower end of the adjusting tank is communicated with the lower end of the etching tank through a communicating pipe, and the input end of the circulating pump is connected with the lower end of the etching tank through a connecting pipe. The output end of the circulating pump is connected with the upper end of a regulating tank through a connecting pipe, a sampling sensor is mounted on the inner wall of the regulating tank, an aeration pipe is mounted at the bottom of the regulating tank, the input end of the aeration pipe is connected with an air source, and a placing plate is mounted above the regulating tank; three liquid storage barrels used for containing water, hydrochloric acid and oxidant liquid respectively are installed above the containing plate. According to the utility model, the aeration pipe is arranged at the bottom of the adjusting tank, and aeration is carried out through the aeration pipe, so that the added sub-liquid can be well mixed with the etching liquid, and the accuracy of the proportion of the sub-liquid in the etching liquid is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit board processing, and particularly relates to an automatic adding device for chemical solutions in circuit board processing. Background Art

[0002] In the existing production line of printed circuit boards, it is usually necessary to etch the printed circuit boards with etching chemical solutions. There is a process of an etching section arranged on the printed circuit board production line. An etching tank is arranged in this etching section process to store the etching chemical solution for etching the circuit board. During the etching process of the printed circuit board, the etching chemical solution needs to be recycled. Since the etching chemical solution will consume hydrochloric acid, oxidant and increase the specific gravity of the chemical solution after etching the circuit board, in order to ensure the etching effect, it is necessary to detect in real time the proportion of the three sub-solutions of water, hydrochloric acid and oxidant in the etching chemical solution in the etching tank, and add one or more of the three sub-solutions into the etching tank, so as to keep the proportion of the three sub-solutions at the best etching effect.

[0003] There are some problems in the actual application of the existing automatic adding device for etching chemical solutions. For example, the Chinese patent application number 201420156612.5 discloses an automatic adding system for etching chemical solutions in a printed circuit board production line, which directly adds the three sub-solutions of water, hydrochloric acid or oxidant directly into the etching tank. The sub-solutions added into the etching tank cannot be well mixed with the etching solution in the etching tank, so that the proportion of the sub-solutions of the etching solution cannot be effectively adjusted. Summary of the Utility Model

[0004] In order to solve the problems raised in the above background art. The utility model provides an automatic adding device for chemical solutions in circuit board processing, which has the characteristics that the added sub-solutions can be well mixed with the original etching solution, so as to ensure that the proportion of the sub-solutions in the etching solution is more accurate.

[0005] To achieve the above object, the utility model provides the following technical solution: An automatic adding device for chemical solutions in circuit board processing, including an adjusting tank and a circulating pump arranged on one side of an etching tank. The lower end of the adjusting tank is communicated with the lower end of the etching tank through a communicating pipe. The input end of the circulating pump is connected with the lower end of the etching tank through a connecting pipe. The output end of the circulating pump is connected with the upper end of the adjusting tank through a connecting pipe. A sampling sensor is installed on the inner wall of the adjusting tank. An air diffuser pipe is installed at the bottom of the adjusting tank. The input end of the air diffuser pipe is connected with a gas source. A placing plate is installed above the adjusting tank. Three liquid storage barrels for storing water, hydrochloric acid and oxidant sub-solutions respectively are installed above the placing plate. The sampling sensor is in signal connection with a PLC controller.

[0006] In order to accurately add water, hydrochloric acid or oxidant sub-liquid into the regulating tank, further, a medicine adding pipe is connected to the bottom of the liquid storage barrel, and a flow meter and a solenoid valve are respectively installed on the medicine adding pipe. Among them, the solenoid valve is arranged below the flow meter, and both the solenoid valve and the flow meter are signal-connected to the PLC controller.

[0007] In order to detect the concentrations of water, hydrochloric acid and oxidant in the etching medicine water in the regulating tank, further, the sampling sensor includes an oxidant sensor, a conductivity sensor and a specific gravity sensor.

[0008] In order to monitor the liquid level height in the regulating tank and automatically add sub-liquid into the regulating tank when the liquid level height is lower than the set threshold value, further, a liquid level gauge is installed on the inner wall of the regulating tank, and the liquid level gauge is signal-connected to the PLC controller.

[0009] In order to introduce the etching liquid into the regulating tank, further, a water outlet pipe connected to the connecting pipe is installed on the inner wall of the regulating tank, and the water outlet pipe is of an L-shaped structure.

[0010] In order to filter the etching liquid pumped into the regulating tank in the etching tank, so as to filter the possible impurities in the etching liquid and ensure the cleanliness of the etching liquid, further, a filter frame is also included, and the filter frame is arranged below the water outlet pipe.

[0011] In order to facilitate the replacement or cleaning of the filter frame, further, a cross bar is also included, the cross bar is arranged above the water outlet pipe, and a hook is installed on the filter frame.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. The regulating tank of the present utility model is arranged on one side of the etching tank. The lower end of the regulating tank is communicated with the lower end of the etching tank through a communicating pipe, and the etching liquid in the etching tank is pumped into the regulating tank through a circulation pump, realizing the circulation of the etching liquid in the etching tank and the regulating tank;

[0014] 2. An aeration pipe is installed at the bottom of the regulating tank of the present utility model, and aeration is carried out through the aeration pipe, so that the added sub-liquid can be well mixed with the etching liquid, ensuring the accuracy of the sub-liquid ratio in the etching liquid;

[0015] 3. A medicine adding pipe is connected to the bottom of the liquid storage barrel of the present utility model, and a flow meter and a solenoid valve are respectively installed on the medicine adding pipe, realizing the accurate addition of water, hydrochloric acid or oxidant sub-liquid into the regulating tank;

[0016] 4. The present utility model also includes a filter frame, the filter frame is arranged below the water outlet pipe, and the etching liquid pumped from the etching tank into the regulating tank is filtered through the filter frame, so that the possible impurities in the etching liquid can be filtered, ensuring the cleanliness of the etching liquid;

[0017] 5. The filter frame of the present utility model is installed by the cooperation of hooks and crossbars, which is convenient for replacing or cleaning the filter frame.

[0018] 6. A liquid level gauge is installed on the inner wall of the adjustment tank of the present utility model to monitor the liquid level height in the adjustment tank. When the liquid level height is lower than the set threshold, the sub-liquid is automatically added to the adjustment tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0020] Figure 1 is a schematic structural view of the present utility model;

[0021] Figure 2 is a schematic top view structural view of the present utility model;

[0022] Figure 3 is a schematic structural view of the liquid storage bucket of the present utility model;

[0023] Figure 4 is a schematic structural view of the adjustment tank in Embodiment 2 of the present utility model;

[0024] In the figure: 1, etching tank; 2, connecting pipe; 3, aeration pipe; 4, adjustment tank; 5, sampling sensor; 6, placement plate; 7, liquid storage bucket; 71, medicine adding pipe; 72, solenoid valve; 73, flow meter; 8, water outlet pipe; 9, liquid level gauge; 10, circulation pump; 11, connecting pipe; 12, filter frame; 13, hook; 14, crossbar. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0026] Embodiment 1

[0027] Please refer to Figures 1-3, the present utility model provides the following technical solutions: An automatic chemical adding device for circuit board processing, including an adjustment tank 4 and a circulation pump 10 arranged on one side of an etching tank 1. The lower end of the adjustment tank 4 is communicated with the lower end of the etching tank 1 through a connecting pipe 2. The input end of the circulation pump 10 is connected to the lower end of the etching tank 1 through a connecting pipe 11, and the output end of the circulation pump 10 is connected to the upper end of the adjustment tank 4 through a connecting pipe 11. A sampling sensor 5 is installed on the inner wall of the adjustment tank 4, and an aeration pipe 3 is installed at the bottom of the adjustment tank 4. The input end of the aeration pipe 3 is connected to a gas source. A placement plate 6 is installed above the adjustment tank 4, and three liquid storage barrels 7 for storing water, hydrochloric acid, and oxidant sub-liquid respectively are installed above the placement plate 6. The sampling sensor 5 is signal-connected to a PLC controller.

[0028] By adopting the above technical solutions, the adjustment tank 4 of the present utility model is arranged on one side of the etching tank 1. The lower end of the adjustment tank 4 is communicated with the lower end of the etching tank 1 through the connecting pipe 2, and the etching solution in the etching tank 1 is pumped into the adjustment tank 4 through the circulation pump 10, realizing the circulation of the etching solution in the etching tank 1 and the adjustment tank 4. The present utility model installs an aeration pipe 3 at the bottom of the adjustment tank 4, and aeration is carried out through the aeration pipe 3, so that the added sub-liquid can be well mixed with the etching solution, ensuring the accuracy of the sub-liquid ratio in the etching solution.

[0029] Specifically, a chemical adding pipe 71 is connected to the bottom of the liquid storage barrel 7. A flow meter 73 and a solenoid valve 72 are respectively installed on the chemical adding pipe 71. Among them, the solenoid valve 72 is arranged below the flow meter 73, and both the solenoid valve 72 and the flow meter 73 are signal-connected to the PLC controller.

[0030] By adopting the above technical solutions, accurate addition of water, hydrochloric acid, or oxidant sub-liquid into the adjustment tank 4 is realized.

[0031] Specifically, the sampling sensor 5 includes an oxidant sensor, a conductivity sensor, and a specific gravity sensor. The oxidant sensor, the conductivity sensor, and the specific gravity sensor are all prior arts known in the automatic chemical adding system for etching solution in a printed circuit board production line with Chinese patent application number 201420156612.5.

[0032] By adopting the above technical solutions, it is used to detect the concentrations of water, hydrochloric acid, and oxidant in the etching chemical solution in the adjustment tank 4.

[0033] Specifically, a water outlet pipe 8 connected to the connecting pipe 11 is installed on the inner wall of the adjustment tank 4. The water outlet pipe 8 is of an L-shaped structure.

[0034] By adopting the above technical solutions, the etching solution is introduced into the adjustment tank 4.

[0035] Embodiment 2

[0036] Please refer to Figure 4, The difference between this embodiment and Embodiment 1 is that specifically, it further includes a filter box 12, and the filter box 12 is arranged below the water outlet pipe 8.

[0037] By adopting the above technical solution, the etching solution pumped from the etching tank 1 into the adjustment tank 4 is filtered by the filter box 12, so that the possible impurities in the etching solution can be filtered, ensuring the cleanliness of the etching solution.

[0038] Specifically, it further includes a cross bar 14. The cross bar 14 is arranged above the water outlet pipe 8. One end of the cross bar 14 is fixed on the adjustment tank 4, and the other end of the cross bar 14 is fixed on the placement plate 6. A hook 13 is installed on the filter box 12.

[0039] By adopting the above technical solution, the filter box 12 is installed by cooperating the hook 13 with the cross bar 14, which is convenient for replacing or cleaning the filter box 12.

[0040] Embodiment 3

[0041] The difference between this embodiment and Embodiment 1 is that specifically, a liquid level gauge 9 is installed on the inner wall of the adjustment tank 4, and the liquid level gauge 9 is signal-connected to the PLC controller.

[0042] By adopting the above technical solution, it is used to monitor the liquid level height in the adjustment tank 4. When the liquid level height is lower than the set threshold, the sub-liquid is automatically added into the adjustment tank 4.

[0043] In summary, the adjustment tank 4 of the present utility model is arranged on one side of the etching tank 1. The lower end of the adjustment tank 4 is communicated with the lower end of the etching tank 1 through a communicating pipe 2, and the etching solution in the etching tank 1 is pumped into the adjustment tank 4 by a circulation pump 10, realizing the circulation of the etching solution in the etching tank 1 and the adjustment tank 4; the present utility model installs an air diffuser pipe 3 at the bottom of the adjustment tank 4, and aeration is carried out through the air diffuser pipe 3, so that the added sub-liquid can be well mixed with the etching solution, ensuring the accuracy of the sub-liquid ratio in the etching solution; the bottom of the liquid storage bucket 7 of the present utility model is connected with a medicine adding pipe 71, and a flow meter 73 and a solenoid valve 72 are respectively installed on the medicine adding pipe 71 to realize the accurate addition of water, hydrochloric acid or oxidant sub-liquid into the adjustment tank 4; the present utility model further includes a filter box 12, and the filter box 12 is arranged below the water outlet pipe 8. The etching solution pumped from the etching tank 1 into the adjustment tank 4 is filtered by the filter box 12, so that the possible impurities in the etching solution can be filtered, ensuring the cleanliness of the etching solution; the filter box 12 of the present utility model is installed by cooperating the hook 13 with the cross bar 14, which is convenient for replacing or cleaning the filter box 12; a liquid level gauge 9 is installed on the inner wall of the adjustment tank 4 of the present utility model, which is used to monitor the liquid level height in the adjustment tank 4. When the liquid level height is lower than the set threshold, the sub-liquid is automatically added into the adjustment tank 4.

[0044] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An automatic adding device for circuit board processing liquid medicine, characterized in that: The invention comprises a regulating tank and a circulation pump which are arranged on one side of the etching tank. The lower end of the regulating tank is connected with the lower end of the etching tank through a connecting pipe. The input end of the circulation pump is connected with the lower end of the etching tank through a connecting pipe. The output end of the circulation pump is connected with the upper end of the regulating tank through a connecting pipe. A sampling sensor is installed on the inner wall of the regulating tank. An aeration pipe is installed at the bottom of the regulating tank. The input end of the aeration pipe is connected with an air source. A placing plate is installed above the regulating tank. Three liquid storage barrels for containing water, hydrochloric acid and oxidant sub-liquid are installed above the placing plate. The sampling sensor is connected with a PLC controller signal.

2. The automatic adding device for circuit board processing liquid medicine according to claim 1, characterized in that: The bottom of the liquid storage barrel is connected with a medicine adding pipe, on which a flow meter and a solenoid valve are respectively installed, wherein the solenoid valve is arranged below the flow meter, and both the solenoid valve and the flow meter are connected with the PLC controller signal.

3. The automatic adding device for circuit board processing liquid medicine according to claim 1, characterized in that: The sampling sensor includes an oxidant sensor, a conductivity sensor and a specific gravity sensor.

4. The automatic adding device for circuit board processing liquid medicine according to claim 1, characterized in that: A liquid level meter is installed on the inner wall of the regulating tank, and the liquid level meter is connected to the PLC controller signal.

5. The automatic adding device for circuit board processing liquid medicine according to claim 1, characterized in that: A water outlet pipe connected to the connecting pipe is installed on the inner wall of the regulating tank, and the water outlet pipe is an L-shaped structure.

6. The automatic adding device for circuit board processing liquid medicine according to claim 5, characterized in that: The utility model also comprises a filter frame, and the filter frame is arranged below the water outlet pipe.

7. The automatic adding device for circuit board processing liquid medicine according to claim 6, characterized in that: The filter frame also includes a cross bar, which is arranged above the water outlet pipe, and a hook is installed on the filter frame.

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