阅读说明：本技术 一种硫酸洗槽药水再生系统 (Sulphuric acid wash tank liquid medicine regeneration system ) 是由 曾祥秒 于 2021-08-20 设计创作，主要内容包括：本申请涉及印制电路板生产设备的技术领域公开了一种硫酸洗槽药水再生系统,其包括内部中空的机身、转动连接在机身中的输送滚轮组、对输送滚轮组上PCB喷淋稀硫酸的喷淋组件和药水再生组件,机身的一端对应输送滚轮组开设有进板口,机身的另一端对应输送滚轮组开设有出板口,机身内灌注有稀硫酸,机身上设置有水泵,水泵的一端与机身内部连通,水泵的另一端与喷淋组件连通,药水再生组件用于对硫酸进行再生。本申请减少了工作人员对机身中稀硫酸进行更换的次数,进而增加硫酸洗槽药水再生系统的工作效率。(The utility model relates to a technical field of printed circuit board production facility discloses a sulphuric acid washtrough liquid medicine regeneration system, it includes inside hollow fuselage, rotate the transport roller train of connection in the fuselage, PCB sprays dilute sulfuric acid's spray set and liquid medicine regeneration subassembly on carrying the roller train, the one end of fuselage corresponds and carries the roller train and seted up the inlet plate mouth, the outlet plate mouth has been seted up to the other end of fuselage corresponding transport roller train, dilute sulfuric acid has been filled in the fuselage, be provided with the water pump on the fuselage, the one end and the inside intercommunication of fuselage of water pump, the other end and the spray set intercommunication of water pump, liquid medicine regeneration subassembly is used for regenerating sulphuric acid. This application has reduced the number of times that the staff changes dilute sulfuric acid in to the fuselage, and then has increased sulphuric acid washtrough liquid medicine regeneration system's work efficiency.)

1. The utility model provides a sulphuric acid wash tank liquid medicine regeneration system which characterized in that: including inside hollow fuselage (100), rotate and connect conveying roller set (200) in fuselage (100), go up PCB to conveying roller set (200) and spray subassembly (300) and liquid medicine regeneration subassembly (400) that dilute sulfuric acid was sprayed to conveying roller set (200), inlet plate mouth (121) have been seted up to the one end of fuselage (100) corresponds conveying roller set (200), outlet plate mouth (122) have been seted up to the other end of fuselage (100) corresponds conveying roller set (200), dilute sulfuric acid has been filled in fuselage (100), be provided with water pump (130) on fuselage (100), the one end and the inside intercommunication of fuselage (100) of water pump (130), the other end and the spray subassembly (300) intercommunication of water pump (130), liquid medicine regeneration subassembly (400) are used for regenerating sulfuric acid.

2. The system of claim 1, wherein: the liquid medicine regeneration assembly (400) comprises a power rectifier (410), an anode plate (420) electrically connected to the positive pole of the power rectifier (410) and a cathode plate (430) electrically connected to the negative pole of the power rectifier (410), wherein the anode plate (420) and the cathode plate (430) are both arranged in the machine body (100).

3. The system of claim 2, wherein: the anode plate (420) and the cathode plate (430) are both positioned below the liquid level of dilute sulfuric acid in the machine body (100).

4. The system of claim 3, wherein: the cathode plate (430) is provided with two cathode plates (430), the two cathode plates (430) are electrically connected, one cathode plate (430) is arranged at the top of the anode plate (420), and the other cathode plate (430) is arranged at the bottom of the anode plate (420).

5. The system of claim 1, wherein: the conveying roller groups (200) are provided with two groups, the two groups of conveying roller groups (200) are arranged oppositely, and a gap for accommodating a PCB is formed between the two groups of conveying roller groups (200).

6. The system of claim 1, wherein: the utility model discloses a spray assembly, including fuselage (100), two relative liquid medicine backward flow bottom plates (600) of setting of fixedly connected with in fuselage (100), two liquid medicine backward flow bottom plates (600) set up respectively in the both sides of spray assembly (300) bottom, every liquid medicine backward flow bottom plate (600) have the trend towards fuselage (100) bottom slope along the direction that is close to fuselage (100) inside.

7. The system of claim 1, wherein: the spraying assemblies (300) are provided with two groups, one group of the spraying assemblies (300) is arranged at the top of the conveying roller group (200), and the other group of the spraying assemblies (300) is arranged at the bottom of the conveying roller group (200).

8. The system of claim 7, wherein: and water baffles (500) are vertically arranged on both sides of the spraying assembly (300) positioned at the top of the conveying roller group (200), and the water baffles (500) are fixedly connected in the machine body (100).

9. The system of claim 8, wherein: the top of the two water baffles (500) is fixedly connected with inner glass (520), one end of the inner glass (520) is fixedly connected with the top of one water baffle (500), and the other end of the inner glass (520) is fixedly connected with the top of the other water baffle (500).

10. The system of claim 8, wherein: and the two opposite side surfaces of the water baffle (500) are fixedly connected with guide plates (510), and the guide plates (510) are positioned at one ends of the water baffle (500) close to the bottom of the guide plates.

Technical Field

The application relates to the technical field of printed circuit board production equipment, in particular to a chemical regeneration system of a sulfuric acid washing tank.

Background

The PCB is also called a printed circuit board, and is a support body of electronic components and a carrier for electrically interconnecting the electronic components. The printed circuit board is composed of an insulating bottom plate and a welding disc for connecting, guiding and assembling and welding electronic elements, and has double functions of a conducting circuit and the insulating bottom plate. The printed wiring board is the paper-based copper-clad printed board which is used for the first time, the variety of the printed board at present is developed from a single-sided board to a double-sided board, a multi-layer board and a flexible board, and the structure and the quality are also developed to the degree of ultrahigh density, miniaturization and high reliability.

In the related technology, for example, chinese patent publication No. CN108811352A discloses a PCB etching machine, comprising an etching section and an etching post-treatment section, which are horizontally connected in sequence, wherein the etching section comprises a first etching tank, a second etching tank, a third etching tank and a first circulating water washing tank, which are connected in sequence, the etching post-treatment section comprises a hot water milling tank, a film removing tank, a water washing tank, a pickling tank, a second circulating water washing tank and a drying section, which are connected in sequence, and further comprises a 55kw etching pump for delivering an etching solution to the etching section, a liquid inlet end of the 55kw etching pump is communicated with an etching solution storage tank, a liquid outlet end of the 55kw etching pump is communicated with a main spraying pipe arranged at the upper end of the etching section through an etching solution delivery pipe, the main spraying pipe is provided with a plurality of communicating pipes, and the communicating pipes are provided with a plurality of branch spraying pipes respectively penetrating into the first etching tank, the second etching tank and the third etching tank. The PCB etching machine adopts an etching pump to finish the conveying of the etching liquid of the etching section, the maintenance rate is low, the pressure of three grooves of the etching section is consistent, and the etching stability is high.

In view of the above-mentioned related technologies, the inventor believes that when the above-mentioned PCB board etching machine is used to process a PCB, dilute sulfuric acid is filled in a pickling tank, and the dilute sulfuric acid in the pickling tank reacts with copper oxide on the surface of the PCB to generate copper sulfate, so that the concentration of the dilute sulfuric acid in the pickling tank becomes low, and further the dilute sulfuric acid in the pickling tank needs to be frequently replaced, and finally the working efficiency of the pickling tank is low.

Disclosure of Invention

In order to improve the work efficiency of descaling bath, this application provides a sulphuric acid descaling bath liquid medicine regeneration system.

The application provides a sulphuric acid washtrough liquid medicine regeneration system adopts following technical scheme:

the utility model provides a sulphuric acid washtrough liquid medicine regeneration system, includes inside hollow fuselage, rotates the transport roller train of connection in the fuselage, to carrying the PCB spray dilute sulfuric acid's spray assembly and liquid medicine regeneration subassembly on the roller train, the one end of fuselage corresponds and carries the roller train and seted up the inlet plate mouth, the other end of fuselage corresponds and carries the roller train and seted up out the board mouth, dilute sulfuric acid has been filled in the fuselage, be provided with the water pump on the fuselage, the one end and the inside intercommunication of fuselage of water pump, the other end and the spray assembly intercommunication of water pump, liquid medicine regeneration subassembly is used for regenerating sulphuric acid.

By adopting the technical scheme, when the sulfuric acid washing tank chemical regeneration system is used, the PCB is fed into the machine body through the board inlet, then the PCB is abutted against the conveying roller group, the conveying roller group conveys the PCB, the water pump pumps the dilute sulfuric acid in the machine body to the spraying assembly, thereby leading the spraying component to spray dilute sulphuric acid on the PCB on the conveying roller group, leading the dilute sulphuric acid to react with copper oxide on the PCB, leading the copper oxide to react with the dilute sulphuric acid to generate copper sulfate and water, leading the generated copper sulfate and water to be separated from the PCB and mixed with the dilute sulphuric acid in the machine body, leading the liquid medicine regeneration component to treat the copper sulfate in the dilute sulphuric acid, thereby leading the sulfate ions in the copper sulfate to react again to generate the sulfuric acid, reducing the reduction of the concentration of the dilute sulfuric acid, the frequency of replacing dilute sulphuric acid is reduced, and the effect of prolonging the service life of the chemical regeneration system of the sulphuric acid washing tank is finally achieved.

Optionally, the liquid medicine regeneration assembly comprises a power rectifier, an anode plate electrically connected to the positive pole of the power rectifier and a cathode plate electrically connected to the negative pole of the power rectifier, and the anode plate and the cathode plate are both arranged in the machine body.

By adopting the technical scheme, when the liquid medicine regeneration assembly regenerates the dilute sulfuric acid, the power rectifier is started, the power rectifier supplies power to the anode plate and the cathode plate, so that the copper sulfate and the water in the dilute sulfuric acid generate sulfuric acid, copper and oxygen under the electrified condition, meanwhile, the copper is electroplated on the cathode plate, then, the copper on the surface of the cathode plate is etched off at regular intervals, the cathode can be reused, on one hand, the regeneration of the dilute sulfuric acid is realized, and on the other hand, the collection of the copper in the dilute sulfuric acid is realized.

Optionally, the anode plate and the cathode plate are both positioned below the liquid level of dilute sulfuric acid in the machine body.

By adopting the technical scheme, when the copper sulfate in the dilute sulfuric acid is electrolyzed, the copper sulfate and the water generate sulfuric acid, copper and oxygen under the electrified condition, and the anode plate and the cathode plate are both arranged below the liquid level of the dilute sulfuric acid in the machine body, so that the normal reaction of the copper sulfate and the water can be ensured as much as possible, the concentration of the dilute sulfuric acid in the machine body is further ensured, the times of replacing the dilute sulfuric acid in the machine body is further reduced, and the working efficiency of a chemical water regeneration system of a sulfuric acid washing tank is further increased.

Optionally, the number of the cathode plates is two, the two cathode plates are electrically connected, one cathode plate is arranged at the top of the anode plate, and the other cathode plate is arranged at the bottom of the anode plate.

Through adopting above-mentioned technical scheme, when liquid medicine regeneration assembly regenerates sulphuric acid, copper can be electroplated on the surface of negative plate, then makes copper be collected on the negative plate, through setting up the negative plate into two, can increase the area of negative plate to increase the area that copper can be electroplated on the negative plate, and then reduce the frequency of carrying out the etching to the negative plate, finally reach the operating frequency who improves sulphuric acid bath liquid medicine regeneration system.

Optionally, the conveying roller groups are provided with two groups, the two groups of conveying roller groups are arranged oppositely, and a gap for accommodating a PCB is formed between the two groups of conveying roller groups.

Through adopting above-mentioned technical scheme, place into the fuselage with PCB through the inlet plate mouth after, PCB is located between two sets of transport roller groups, and the both sides that PCB is relative simultaneously contradict with two sets of transport roller groups respectively to two sets of transport roller groups carry PCB, can reduce spray set through setting up two sets of transport roller groups and spray when PCB sprays, the condition of PCB disorder on transport roller group takes place, and then increases the stability of transport roller group when carrying PCB.

Optionally, the body is fixedly connected with two liquid medicine backflow bottom plates which are arranged oppositely, the two liquid medicine backflow bottom plates are arranged on two sides of the bottom of the spraying assembly respectively, and each liquid medicine backflow bottom plate has a tendency of inclining towards the bottom of the body along a direction close to the inside of the body.

Through adopting above-mentioned technical scheme, the dilute sulphuric acid that spray assembly sprayed out probably falls on liquid medicine backward flow bottom plate, makes dilute sulphuric acid then move along the incline direction of liquid medicine backward flow bottom plate to it takes place to reduce the condition that dilute sulphuric acid glues on the fuselage inner wall.

Optionally, the spraying assemblies are provided in two groups, one group of the spraying assemblies is arranged at the top of the conveying roller group, and the other group of the spraying assemblies is arranged at the bottom of the conveying roller group.

Through adopting above-mentioned technical scheme, when carrying out the pickling to the double sided board, start two sets of spray assembly, make spray assembly spray to two terminal surfaces of double sided board then to the realization reduces the condition emergence that needs twice to the double sided board pickling to the pickling of double sided board, and then reaches the effect that improves sulphuric acid washtrough liquid medicine regeneration system work efficiency.

Optionally, water baffles are vertically arranged on two sides of the spraying assembly on the top of the conveying roller group, and the water baffles are fixedly connected in the machine body.

Through adopting above-mentioned technical scheme, when spray assembly sprayed dilute sulfuric acid to PCB, the breakwater that is located spray assembly both sides blockked dilute sulfuric acid, and it is taken place to reduce the condition that dilute sulfuric acid is sprayed the fuselage outside then to the reduction needs the condition that the staff goes on clearing up to fuselage week side to take place, and then reaches the effect that reduces staff's amount of labour.

Optionally, the top of the two water baffles is fixedly connected with inner layer glass, one end of the inner layer glass is fixedly connected with the top of one water baffle, and the other end of the inner layer glass is fixedly connected with the top of the other water baffle.

Through adopting above-mentioned technical scheme, when spray assembly sprayed dilute sulphuric acid to PCB, dilute sulphuric acid was sprayed on PCB, when spray assembly's pressure was great, sprayed dilute sulphuric acid on PCB and splashed easily, inner glass stopped the dilute sulphuric acid that splashes to reduce the condition that dilute sulphuric acid splashes on the fuselage roof and takes place.

Optionally, the two opposite side surfaces of the water baffle are fixedly connected with guide plates, and the guide plates are located at one ends, close to the bottoms of the water baffle, of the water baffle.

Through adopting above-mentioned technical scheme, the dilute sulfuric acid that sprays on the breakwater moves along the breakwater, makes then the deflector lead to the motion of dilute sulfuric acid, makes then the deflector lead dilute sulfuric acid towards the inside intermediate position of fuselage to make dilute sulfuric acid have the trend towards the motion of fuselage intermediate position, and then reduce the condition of dilute sulfuric acid adhesion on the fuselage inner wall and take place.

In summary, the present application includes at least one of the following beneficial technical effects:

1. by arranging the machine body, the conveying roller group, the spraying assembly and the liquid medicine regeneration assembly, when the PCB is pickled, the PCB is placed into the machine body, then the conveying roller group is used for conveying the PCB, meanwhile, the spraying assembly sprays dilute sulfuric acid to the PCB, the dilute sulfuric acid reacts with copper oxide on the PCB to generate copper sulfate and water, and the liquid medicine regeneration assembly regenerates the dilute sulfuric acid in the machine body, so that the concentration of the dilute sulfuric acid in the machine body is kept unchanged as much as possible, namely, the times of replacing the dilute sulfuric acid in the machine body by workers are reduced, and the working efficiency of a sulfuric acid washing tank liquid medicine regeneration system is increased;

2. by arranging the power rectifier, the anode plate and the cathode plate, the anode plate is electrically connected with the anode of the power rectifier, the cathode plate is electrically connected with the cathode of the power rectifier, when dilute sulfuric acid in the machine body is regenerated, copper sulfate and water generate sulfuric acid, copper and water under the electrified condition, and simultaneously, copper is plated on the cathode plate, so that the effect of regenerating the dilute sulfuric acid is achieved;

3. the cathode plate and the anode plate are arranged below the liquid level of the dilute sulfuric acid in the machine body, so that the normal reaction of copper sulfate and water can be ensured as far as possible, the situation that the concentration of the dilute sulfuric acid in the machine body becomes low is reduced, and the working efficiency of the chemical regeneration system of the sulfuric acid washing tank is further improved.

Drawings

FIG. 1 is a schematic diagram of a chemical regeneration system of a sulfuric acid washing tank according to an embodiment of the present disclosure;

FIG. 2 is a top view of a sulfuric acid wash tank chemical regeneration system of an embodiment of the present application, showing primarily a water pump;

fig. 3 is a schematic structural diagram of a sulfuric acid washing tank chemical regeneration system according to an embodiment of the present application, mainly illustrating a plate inlet.

Description of reference numerals: 100. a body; 110. a lower housing; 120. an upper housing; 121. a plate inlet; 122. a plate outlet; 130. a water pump; 200. a conveying roller group; 300. a spray assembly; 400. a liquid medicine regeneration component; 410. a power rectifier; 420. an anode plate; 430. a cathode plate; 500. a water baffle; 510. a guide plate; 520. inner layer glass; 600. the liquid medicine flows back to the bottom plate.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses a sulphuric acid washtrough liquid medicine regeneration system.

Referring to fig. 1 and 2, the chemical regeneration system for the sulfuric acid washing tank comprises a machine body 100, a conveying roller group 200, a spraying assembly 300 and a chemical regeneration assembly 400, wherein the interior of the machine body 100 is hollow, dilute sulfuric acid is filled in the machine body 100, and the concentration of the dilute sulfuric acid is 3% -5%. The conveying roller set 200 is provided in the body 100, and the conveying roller set 200 conveys the PCB. The water pump 130 is arranged on the body 100, one end of the water pump 130 is communicated with the interior of the body 100, the other end of the water pump 130 is communicated with the spray assembly 300, and the water pump 130 is used for pumping dilute sulfuric acid in the body 100 to the spray assembly 300. The spraying assembly 300 is arranged in the machine body 100, and dilute sulfuric acid entering the spraying assembly 300 sprays dilute sulfuric acid on the PCB conveyed on the conveying roller set 200, so that the dilute sulfuric acid reacts with copper oxide on the PCB, and the dilute sulfuric acid reacts with the copper oxide to generate copper sulfate and water.

The chemical liquid regeneration assembly 400 is arranged in the machine body 100, so that the chemical liquid regeneration assembly 400 regenerates the dilute sulfuric acid in the machine body 100, the occurrence of the condition that the concentration of the dilute sulfuric acid in the machine body 100 becomes low is reduced, namely, the times of adding the dilute sulfuric acid into the machine body 100 by workers or the times of replacing the dilute sulfuric acid in the machine body 100 are reduced, and the working efficiency of the chemical liquid regeneration system of the sulfuric acid washing tank is improved.

Referring to fig. 1 and 2, in order to realize the regeneration of dilute sulfuric acid, the chemical solution regeneration assembly 400 includes a power rectifier 410, an anode plate 420 and a cathode plate 430, and the anode plate 420 and the cathode plate 430 are made of titanium material. The anode plate 420 is electrically connected to the positive pole of the power rectifier 410 and the cathode plate 430 is electrically connected to the negative pole of the power rectifier 410. The power rectifier 410 is placed outside the fuselage 100, the anode plate 420 and the cathode plate 430 are both placed in the fuselage 100, and the anode plate 420 and the cathode plate 430 are both below the level of dilute sulfuric acid in the fuselage 100. Copper sulfate generated by the reaction of the dilute sulfuric acid and the copper oxide is gathered into the dilute sulfuric acid in the machine body 100, the power rectifier 410 is started, the power rectifier 410 supplies power to the anode plate 420 and the cathode plate 430, and then the copper sulfate and water in the dilute sulfuric acid generate sulfuric acid, copper and oxygen under the condition of electrifying, namely, the effect of dilute sulfuric acid regeneration is achieved.

Copper generated by the reaction is plated on the cathode plate, and the number of hydroxide ions and sulfate ions in the machine body 100 is not changed, so that the concentration of dilute sulfuric acid in the machine body 100 is not changed, the concentration of dilute sulfuric acid in the machine body 100 can be kept for a long time without adding dilute sulfuric acid, the inconvenience of changing the dilute sulfuric acid in the production process is reduced, the production efficiency is improved, and the emission of the dilute sulfuric acid is reduced.

In order to increase the contact area of the cathode plate with the dilute sulfuric acid in the body 100, the cathode plate 430 is provided in two pieces, and the two cathode plates 430 are electrically connected. One cathode plate 430 is positioned on top of the anode plate 420 and the other cathode plate 430 is positioned on the bottom of the anode plate 420, with a gap between each cathode plate 430 and the anode plate 420. When the copper sulfate and the water in the dilute sulfuric acid react under the regulation of electrification to generate sulfuric acid, copper and oxygen, and copper is plated on the cathode plate 430, the contact surface of the cathode plate 430 and the dilute sulfuric acid can be increased by arranging the cathode plates 430 in two, the contact surface of the cathode plate 430 and the copper sulfate is increased, and the area of the copper plated on the cathode plate 430 is increased.

After the power rectifier 410 supplies power to the anode plate 420 and the cathode plate 430, the hydroxyl ions lose electrons on the anode plate 420 and generate water and oxygen, and the copper ions get electrons on the cathode plate 430 to form copper and plate on the cathode plate 430. Oxygen generated on the anode plate 420 moves towards the upper shell 120, bubbles are generated in the lower shell 110 and move towards the upper shell 120, the bubbles disturb dilute sulfuric acid in the lower shell 110 in the moving process, and because the two cathode plates 430 are respectively arranged at the top and the bottom of the anode plate 420, after the bubbles are contacted with the cathode plates 430, the volume of the bubbles is reduced and the number of the bubbles is increased, so that the disturbing effect of the bubbles on the dilute sulfuric acid is increased, namely, the reaction speed of copper sulfate in the lower shell 110 can be increased, the influence of the existence of the copper sulfate on the concentration of the dilute sulfuric acid is reduced, and the pickling effect on the PCB is ensured as much as possible.

With the continuous increase of the use time of the sulfuric acid bath chemical regeneration system, more and more copper is plated on the cathode plate 430, at the moment, the copper on the surface of the cathode plate 430 can be etched periodically, so that the copper on the cathode plate 430 is removed, and the removed cathode plate 430 can be reused, namely, the reuse of the cathode plate 430 is realized.

Referring to fig. 1 and 3, in order to reduce the occurrence of diluted sulfuric acid sprayed to the outside of the main body 100 when the sulfuric acid bath chemical regeneration system performs acid washing on PCBs, the main body 100 includes a lower housing 110 and an upper housing 120, the top of the lower housing 110 is open, and the bottom of the upper housing 120 is open. The upper housing 120 is covered on the lower housing 110 and is fixedly connected to the lower housing 110. The conveying roller group 200 is disposed in the upper housing 120, a length of the upper housing 120 parallel to the conveying direction of the conveying roller group 200 to the PCB is a, and a length of the lower housing 110 parallel to the conveying direction of the conveying roller group 200 to the PCB is B, a > B. One end of the upper housing 120 is provided with a plate inlet 121 corresponding to the conveying roller set 200, and the other end of the upper housing 120 is provided with a plate outlet 122 corresponding to the conveying roller set 200. Dilute sulfuric acid is poured into the lower housing 110. The top view projection of the spray assembly 300 falls within the lower housing 110.

When the PCB is pickled, the PCB is placed into the upper housing 120 through the board inlet 121, and then the conveying roller set 200 conveys the PCB, and the spraying assembly 300 sprays dilute sulfuric acid on the PCB, so that the dilute sulfuric acid reacts with copper oxide on the PCB, and finally the PCB moves out of the upper housing 120 through the board outlet 122. Since the top projection of the spraying assembly 300 is located in the lower housing 110, the spraying of dilute sulfuric acid to the outside of the main body 100 when the spraying assembly 300 sprays dilute sulfuric acid to the PCB can be reduced.

Because the dilute sulfuric acid sprayed by the spraying assembly 300 has a certain pressure, when the dilute sulfuric acid is sprayed onto the PBC, a force is applied to the PBC, so that the PBC is easy to move around on the conveying roller set 200, and the conveying roller set 200 has lower conveying efficiency on the PBC.

Referring to fig. 1 and 3, in order to improve the efficiency of the PBC transmission by the conveying roller sets 200, the conveying roller sets 200 are provided in two sets, the two sets of conveying roller sets 200 are oppositely disposed, and a gap for transmitting the PBC is formed between the two sets of conveying roller sets 200. After the PBC enters the upper housing 120 through the board inlet 121, two end faces of the PBC are respectively abutted against the two sets of conveying roller sets 200, and the conveying roller sets 200 convey the PBC simultaneously. Through the conflict of two terminal surfaces of two sets of conveying roller group 200 and PBC, reduce the condition that PBC moves about under the pressure that dilute sulphuric acid exerted and take place, stability when can increase conveying roller group 200 and carry PBC.

In order to realize the spraying of a plurality of end faces of the PCB, two groups of spraying assemblies 300 are provided, two groups of spraying assemblies 300 are oppositely arranged, one group of spraying assemblies 300 is arranged at the top of two groups of conveying roller groups 200, and the other group of spraying assemblies 300 is arranged at the bottom of two groups of conveying roller groups 200. When carrying roller train 200 and carrying PCB, two sets of spray set 300 all spray dilute sulfuric acid to PCB, make then two terminal surfaces that PCB is relative all with dilute sulfuric acid contact, realized promptly spraying to a plurality of terminal surfaces of PCB, and then increase the thoroughness when sulphuric acid washing tank liquid medicine regeneration system carries out the pickling to PCB.

In order to reduce the splashing of the dilute sulfuric acid out of the upper housing 120, water baffles 500 are vertically arranged on both sides of the spraying assembly 300 positioned on the top of the conveying roller set 200, and each water baffle 500 is fixedly connected in the upper housing 120. The two opposite sides of the water baffle 500 are fixedly connected with guide plates 510, and each guide plate 510 is located at one end of the corresponding water baffle 500 close to the bottom of the guide plate. Each guide plate 510 has a tendency of inclining towards the lower housing 110 along a direction away from the corresponding water guard 500, and then when the dilute sulfuric acid sprayed by the spray assembly 300 splashes, the water guard 500 stops the dilute sulfuric acid, so that the dilute sulfuric acid is splashed onto the water guard 500, the dilute sulfuric acid splashed onto the water guard 500 moves along the water guard 500, the guide plates 510 guide the flowing of the dilute sulfuric acid, and further the situation that the dilute sulfuric acid moves towards the outside of the upper housing 120 is reduced.

In order to reduce the occurrence of the situation that the dilute sulfuric acid sprayed on the PCB splashes on the inner wall of the upper housing 120, the top of the two water baffles 500 is provided with an inner layer glass 520, one end of the inner layer glass 520 is fixedly connected with the top of one water baffle 500, and the other end of the inner layer glass 520 is fixedly connected with the top of the other water baffle 500. After the diluted sulfuric acid is sprayed on the PCB, the sprayed diluted sulfuric acid is blocked by the inner glass 520, thereby reducing the occurrence of the diluted sulfuric acid being sprayed on the inner wall of the upper housing 120.

When the spraying assembly 300 sprays the PCBs, the dilute sulfuric acid may be adhered to the conveying roller set 200, and when the conveying roller set 200 conveys the PCBs, the dilute sulfuric acid adhered to the PCBs may also be adhered to the conveying roller set 200, and then the dilute sulfuric acid may fall outside the lower housing 110.

Referring to fig. 1 and 3, in order to reduce the possibility that dilute sulfuric acid may fall on the outside of the lower housing 110, two chemical solution return bottom plates 600 are fixedly connected to the bottom of the upper housing 120, and the two chemical solution return bottom plates 600 are disposed opposite to each other. One liquid medicine backflow bottom plate 600 is arranged at one end of the upper shell 120 close to the beginning end of the conveying roller group 200, and the other liquid medicine backflow bottom plate 600 is arranged at one end of the upper shell 120 close to the tail end of the conveying roller group 200. The ends, far away from the inner wall of the upper shell 120, of the two liquid medicine backflow bottom plates 600 are obliquely inserted into the lower shell 110, the height of one end, fixedly connected with the inner wall of the upper shell 120, of each liquid medicine backflow bottom plate 600 is C relative to the horizontal plane, and the height of one end, far away from the inner wall of the upper shell 120, of each liquid medicine backflow bottom plate 600 is D relative to the horizontal plane, wherein C is greater than D. The dilute sulfuric acid adhered to the delivery roller set 200 falls on the chemical solution return bottom plate 600, so that the dilute sulfuric acid moves into the lower housing 110 along the inclined direction of the chemical solution return bottom plate 600, thereby reducing the occurrence of the condition that the dilute sulfuric acid falls outside the lower housing 110 and reducing the possibility of volume reduction of the dilute sulfuric acid in the lower housing 110.

The implementation principle of a sulphuric acid washtrough liquid medicine regeneration system of the embodiment of the application is: when the PCB is pickled, the PCB is placed into the upper housing 120 through the board inlet 121, and simultaneously the PCB enters between the two sets of conveying roller sets 200, and the conveying roller sets 200 convey the PCB. The water pump 130 pumps the dilute sulfuric acid in the lower housing 110 to the spray assembly 300, and the spray assembly 300 sprays the dilute sulfuric acid on the PCBs. The dilute sulfuric acid reacts with copper oxide on the PCB and produces copper sulfate and water. Copper sulfate and water enter the lower shell 110 and are incorporated into the dilute sulfuric acid. The power rectifier 410 supplies power to the anode plate and the cathode plate, the copper sulfate and the water generate sulfuric acid, copper and water under the electrified condition, and the copper is plated on the cathode plate, so that the regeneration of the sulfuric acid is completed.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.