CN105642001A - drum filter system - Google Patents

Abstract

The invention discloses a roller filtering system which comprises a box body, a roller, a liquid return groove, a slag return groove and a power device, wherein the roller is fixedly supported in the box body, and the power device is fixed in the box body and used for driving the roller to rotate. The axial direction of the drum is parallel to the horizontal direction. The liquid return tank and the slag return tank are respectively positioned below the roller, the liquid return tank is arranged opposite to the side wall of the roller, the width of the liquid return tank along the axial direction of the roller is equal to the width of the side wall of the roller along the axial direction of the roller, and the liquid return tank is provided with a liquid outlet communicated with the outside; the slag returning groove is opposite to the opening end of the side wall of the barrel, and the orthographic projection of the opening end of the side wall of the barrel to the direction of the slag returning groove is positioned in the slag returning groove. Compared with the prior art, the roller filtering system has the advantages of simple structure, good filtering effect, high efficiency and low maintenance cost.

Description

drum filter system

technical field

The invention relates to the technical field of PCB film removal, in particular to a drum filtration system applied to membrane residue filtration.

Background technique

Film removal is a very important process link in the field of printed circuit board (PCB), specifically refers to a process in the PCB production process, the printed circuit board has obtained the required graphics after the etching process, But this layer of graphics is etched under the cover protection of dry film or wet film, because the etching solution will corrode the conductive metal, so use dry film or wet film to protect the required graphics. But after obtaining the desired pattern, the dry film or wet film covered on the printed circuit board will be removed, and the process of removing this layer of protective film is called film withdrawal.

However, in this process, a large amount of dry film/wet film slag will fall into the chemical solution, which needs to be cleaned up in time, otherwise the chemical solution will have a negative impact on the accuracy of the related process during the circulation process.

In the related art, a belt mesh filter system or a cyclone filter system is used. The belt mesh filter system is easily blocked by large film residues when used, requiring frequent manual intervention, which affects the efficiency of the entire circuit board production; the structure of the cyclone filter system is complex, and the dry film or wet film with a specific gravity close to the film removal solution cannot be separated. , The filtering effect is not good, the repair and maintenance of the system are cumbersome, and it needs to be shut down for maintenance, which affects the production efficiency.

Therefore, it is necessary to provide a new filter system to solve the above technical problems.

Contents of the invention

The purpose of the present invention is to overcome the above technical problems and provide a drum filter system with simple structure, good filtering effect, high efficiency and low maintenance cost.

The drum filtration system provided by the present invention includes a box body, a drum fixedly supported in the box body, a liquid return tank, a slag return tank, and a power device fixed in the box body for driving the rotation of the drum. The axial direction of the drum is parallel to the horizontal direction. The drum includes a bottom wall, a side wall and a liquid inlet through the bottom wall of the drum. One end of the side wall is fixedly connected to the bottom wall of the drum. One end is set as an open end, and the side wall of the cylinder includes a plurality of filter holes. The liquid return tank and the slag return tank are respectively located under the drum, the liquid return tank is arranged opposite to the side wall of the drum, and the width of the liquid return tank along the drum axis is equal to the The width of the drum side wall along the axial direction of the drum, the liquid return tank is provided with a liquid outlet connected to the outside; the slag return tank is arranged opposite to the opening end of the drum side wall, The orthographic projection of the opening end of the wall to the direction of the slag return tank is located in the slag return tank.

Preferably, the cross-sectional area of the cylinder side wall gradually increases from the cylinder bottom wall to the direction away from the cylinder bottom wall.

Preferably, the side wall of the cylinder is metal mesh.

Preferably, the drum filter system further includes a fixed shaft parallel to the drum and fixed to the box, and a plurality of mutually parallel reinforcing ribs sleeved on the side wall of the drum, the fixed shaft runs through the The ribs are used to suspend the roller in the box.

Preferably, a raceway is provided on a side of the reinforcing rib close to the side wall of the cylinder, and a raceway is provided on the sidewall of the cylinder to cooperate with the raceway.

Preferably, the power device includes a motor fixed on the outside of the box, a driving gear fixed on the inside of the box, and a driven gear sleeved and fixed on the side wall of the cylinder, and the motor drives the driving gear The gears link the driven gears.

Preferably, the drum filter system further includes an exhaust port that communicates the box with the outside.

Preferably, the exhaust port is located on the side wall of the box and above the drum.

Preferably, the drum further includes a buffer pipe extending from the liquid inlet to the inside of the drum, the buffer pipe includes a main pipe and a baffle parallel to the cross section of the main pipe, the main pipe is connected to the main pipe The liquid inlet is connected, and the baffle is fixedly connected to the main pipe at a certain distance.

Preferably, the liquid outlet and the liquid inlet are located on the same side wall of the tank, and the liquid return tank is directed from the side close to the open end of the drum to the liquid outlet. Downslope setting.

Compared with the related technology, the drum filtration system provided by the present invention drives the drum to rotate through the power device, and the drum is arranged horizontally. The filter hole enters the liquid return tank, while the film residue is filtered and left in the drum, and the rotation of the drum makes the film residue collect to the open end and fall into the residue return tank, so that the liquid, Slag separation, excellent filtration effect. Because the drum is in a rotating state, the film residue will never block the filter hole and prevent the filtration of the liquid medicine. According to the amount of the liquid medicine with film residue to be filtered, the rotation speed of the drum is adjusted correspondingly, and no manual maintenance is required. , High filtration efficiency. The drum filter system has the advantages of simple structure, long service life, small manual maintenance workload, improved production efficiency and reduced production cost.

Description of drawings

Fig. 1 is a three-dimensional schematic diagram of the drum filtration system of the present invention.

Fig. 2 is a perspective structural schematic diagram of another viewing angle of the drum filter system of the present invention.

Fig. 3 is a sectional view along line A-A in Fig. 1 .

Fig. 4 is a partial structural schematic diagram of the drum filtration system of the present invention.

Fig. 5 is a schematic diagram of the structure of the drum filter system of the present invention when it is used in connection with the electroplating tank.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Please refer to FIG. 1 to FIG. 3 at the same time. FIG. 1 is a three-dimensional schematic diagram of the drum filter system of the present invention. Fig. 2 is a perspective structural schematic diagram of another viewing angle of the drum filter system of the present invention. Fig. 3 is a sectional view along line A-A in Fig. 1 . The drum filtration system 10 provided by the present invention includes a box body 1, a drum 2 fixedly supported in the box body 1, a liquid return tank 3, a slag return tank 4, and a tank fixed to the box body 1 for driving the drum 2 rotating power unit 5 . The axial direction of the drum 2 is parallel to the horizontal direction, that is, the drum 2 is arranged horizontally. The liquid return tank 3 and the slag return tank 4 are located below the drum 2, the liquid return tank 3 is used to receive the medicinal liquid filtered out by the drum 2, and the slag return tank 4 is used to receive the The membrane slag left by the filtration of the above-mentioned drum 2.

The box body 1 includes a side wall 11 and a cover plate 12 , the side wall 11 encloses a receiving space, and the cover plate 12 covers the top of the side wall 11 . The side wall 11 , the cover plate 12 , the liquid return tank 3 and the slag return tank 4 together form a closed space.

The drum 2 is annular and includes a bottom wall 21 , a side wall 22 and a liquid inlet 23 penetrating through the bottom wall 21 , one end of the side wall 22 is fixedly connected to the bottom wall 21 , The other end is set as an open end (not labeled), and the cylinder side wall 22 includes a plurality of filter holes 221 passing through it. The filter hole 221 is used to filter and separate the slag and the liquid in the electroplating chemical solution. Therefore, the aperture of the filter hole 221 can be set according to production needs, such as the aperture setting is smaller than the size of the film residue to be filtered, so as to meet filter effect.

In this embodiment, the cross-sectional area of the cylinder side wall 22 gradually increases from the cylinder bottom wall 21 to the direction away from the cylinder bottom wall 21 (that is, toward the opening end), that is, the cylinder side wall 22 is trumpet-shaped. This structure makes it easier and faster for the film slag left in the drum 2 to rotate and move to the opening end during the rotation of the drum, and then to be recycled into the slag return tank 4 . In this embodiment, the cylinder side wall 22 is made of metal mesh.

Specifically, the drum 2 also includes a buffer pipe 24 extending from the liquid inlet 23 to the inside of the drum 2, and the buffer pipe 24 includes a main pipe 241 and a baffle parallel to the cross section of the main pipe 241 242 , the main body pipe 241 communicates with the liquid inlet 23 , and the baffle plate 242 is fixedly connected to the main body pipe 241 at a certain distance. When the liquid medicine flows into the drum 2 from the liquid inlet 23, the main pipe 241 of the buffer pipe 24 conducts drainage for a short distance, and then the baffle plate 242 is used to stop the liquid and slow down and change the flow direction of the liquid medicine , to prevent the liquid medicine from directly rushing out of the drum 2 due to excessive pressure.

The liquid return tank 3 and the slag return tank 4 are respectively located below the drum 2 . The liquid return tank 3 is arranged opposite to the side wall 22 of the cylinder, and the width of the liquid return tank 3 along the axial direction of the drum 2 is equal to the width of the side wall 22 of the cylinder along the axial direction of the drum 2 . The structure effectively ensures that all the liquid medicine filtered in the drum 2 can flow into the liquid return tank 3 . The liquid return tank 3 is provided with a liquid outlet 31 communicating with the outside world, which is used to return the filtered medicinal liquid for recycling and save production cost.

More preferably, the liquid outlet 31 and the liquid inlet 23 are located on the same side wall 11 of the box body 1, and the liquid return tank 3 is defined by the side close to the open end of the drum 2. The direction of the liquid outlet 31 is inclined downward, so that the liquid medicine that flows into the liquid return tank 3 after being filtered can flow back into circulation faster and more completely.

In this embodiment, the slag return tank 4 is arranged opposite to the opening end of the cylinder side wall 22, and the orthographic projection of the open end of the cylinder side wall 22 to the slag return tank 4 is located in the In the slag tank 4, so that all film slag retained in the drum 2 can be completely recovered at an accurate position. Of course, the structure of the slag return tank 4 is not limited thereto, as long as it is arranged opposite to the opening end of the cylinder side wall 22 so that it can completely receive the film slag rolling out of the opening end.

Please refer to FIG. 4 , which is a partial structural schematic view of the drum filtration system of the present invention. The power device 5 includes a motor 51 fixed on the outside of the box body 1, a driving gear 52 fixed on the inside of the box body 1, and a driven gear 53 sleeved and fixed on the side wall 22 of the cylinder. 51 is fixedly connected with the driving gear 52, the driving gear 52 is engaged with the driven gear 53, and the motor 51 drives the driving gear 52 to make the driven gear 53 interlock, thereby driving the drum 2 to rotate . In this embodiment, specifically, the motor 51 is a variable frequency motor. The rotation speed of the motor 51 can be adjusted according to the flow rate of the filtered chemical solution and the amount of film residue, so as to change the rotation speed of the drum 2 in good time, so as to save energy while ensuring the filtering effect.

Specifically, the drum filter system 10 of the present invention also includes a fixed shaft 6 parallel to the drum 2 and fixed to the box body 1, and a plurality of mutually parallel reinforcing ribs sleeved on the side wall 22 of the drum. 7. The fixed shaft 6 passes through the reinforcing rib 7, so that the drum 2 is suspended in the box body 1 . When the motor 51 drives the drum 2 to rotate, the drum 2 is supported by the reinforcing rib 7 and the fixed shaft 6 and rotates within the reinforcing rib. This structure increases the firmness of the drum, has greater pressure bearing capacity, and has a more stable structure. In order to reduce the frictional resistance when the drum 2 rotates, a raceway (not shown) is provided on the side of the reinforcing rib 7 close to the side wall 22 of the cylinder, and the side wall 22 of the cylinder is provided with the Roll groove for raceway fit (not shown).

Due to the presence of irritating smoke in the electroplating chemical solution, the drum filter system 10 also includes an exhaust port 8 that communicates the box body 1 with the outside world, and the chemical solution is in the drum 2 in the box body 1 When filtering, the chemical odor produced by it is dispersed into the box body 1, and the exhaust port 8 communicates with an external flue gas treatment system (not shown), and the flue gas is guided and discharged to improve the production environment.

The smoke in the electroplating chemical solution is lighter than the air and disperses upwards. In order to be fully exhausted, the exhaust port 8 is located on the side wall 11 of the box 1 and above the drum 2 .

Please refer to FIG. 5 , which is a structural diagram of the drum filter system of the present invention when connected to the electroplating tank. The drum filtration system 10 communicates with the main tank 201 and the auxiliary tank 202 of the electroplating tank 20 through the liquid inlet 23 and the liquid outlet 31 respectively, and the chemical solution with film slag in the main tank 201 passes through the The liquid inlet 23 flows into the drum 2, and is rotated and filtered through the drum 2. The filtered medicinal liquid is filtered out to the liquid return tank 3, and the filtered film residue is transferred to the residue return tank 4. The return liquid tank 3 sends the filtered liquid medicine back to the secondary tank 202 of the electroplating tank 20 through the liquid outlet 31, and the secondary tank 202 pumps the filtered liquid medicine back to the main tank 201. Complete the recycling of the liquid medicine. The flue gas generated during the whole process is exhausted to the outside flue gas treatment system through the exhaust port 8 on the box body 1 .

Compared with the related technology, the drum filtration system provided by the present invention drives the drum to rotate through the power device, and the drum is arranged horizontally. The filter hole enters the liquid return tank, while the film residue is filtered and left in the drum, and the rotation of the drum makes the film residue collect to the open end and fall into the residue return tank, so that the liquid, Slag separation, excellent filtration effect. Because the drum is in a rotating state, the film residue will never block the filter hole and prevent the filtration of the liquid medicine. According to the amount of liquid medicine with film residue to be filtered, the rotation speed of the drum is adjusted correspondingly, and no manual maintenance is required. , High filtration efficiency. The drum filter system has the advantages of simple structure, long service life, small manual maintenance workload, improved production efficiency and reduced production cost.

The above is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process conversion made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technologies fields, all of which are equally included in the scope of patent protection of the present invention.

Claims (10)

1. A drum filtration system, characterized in that: comprising a casing, a drum fixedly supported in the casing, a liquid return tank, a slag return tank, and a power device fixed to the casing for driving the rotation of the drum , the axial direction of the cylinder is parallel to the horizontal direction, the cylinder includes a cylinder bottom wall, a cylinder side wall and a liquid inlet through the cylinder bottom wall, one end of the cylinder side wall is fixedly connected to the cylinder bottom wall, The other end is set as an open end, and the side wall of the cylinder includes a plurality of filter holes; the liquid return tank and the slag return tank are respectively located under the drum, and the liquid return tank is directly opposite to the side wall of the cylinder. For setting, the width of the liquid return tank along the axial direction of the drum is equal to the width of the cylinder side wall along the axial direction of the drum, the liquid return tank is provided with a liquid outlet connected to the outside, and the slag return The groove is arranged opposite to the opening end of the side wall of the cylinder, and the orthographic projection of the opening end of the side wall of the cylinder to the direction of the slag returning groove is located in the slag returning groove. 2 . The drum filter system according to claim 1 , wherein the cross-sectional area of the side wall of the drum gradually increases from the bottom wall of the drum to a direction away from the bottom wall of the drum. 3 . 3. The drum filter system according to claim 1, characterized in that: the side wall of the drum is a metal mesh. 4. The drum filter system according to claim 1, characterized in that: the drum filter system further comprises a fixed shaft parallel to the drum and fixed to the box, and a plurality of shafts sleeved on the side wall of the drum. Two reinforcing ribs are arranged parallel to each other, and the fixed shaft passes through the reinforcing ribs and suspends the roller in the box. 5. The drum filter system according to claim 4, characterized in that: a raceway is provided on the side of the reinforcing rib close to the side wall of the cylinder, and a roller cooperating with the raceway is provided on the side wall of the cylinder. groove. 6. The drum filter system according to claim 1, characterized in that: the power device includes a motor fixed on the outside of the box, a driving gear fixed on the inside of the box and sleeved and fixed on the cylinder The driven gear on the side wall, the motor drives the driving gear to link the driven gear. 7. The drum filter system according to claim 1, characterized in that: the drum filter system further comprises an exhaust port connecting the box body with the outside. 8. The drum filter system according to claim 7, characterized in that: the exhaust port is located on the side wall of the box and above the drum. 9. The drum filter system according to claim 1, characterized in that: the drum further includes a buffer pipe extending from the liquid inlet to the inside of the drum, and the buffer pipe includes a main pipe and parallel to the A baffle on the cross section of the main pipe, the main pipe communicates with the liquid inlet, and the baffle is fixedly connected to the main pipe at a certain distance. 10. The drum filter system according to claim 1, characterized in that: the liquid outlet and the liquid inlet are located on the same side wall of the tank, and the liquid return tank is formed by the One side of the opening end is inclined downward toward the direction of the liquid outlet.