PCB etching production spraying liquid circulating conveying pump

Abstract

The invention relates to the field of liquid conveying pumps, in particular to a PCB etching production spraying liquid circulating conveying pump. According to the PCB etching production spraying liquid circulating conveying pump, spraying liquid flowing through the liquid inlet pipe is continuously sucked and conveyed into a spraying liquid conveying system through the impeller, meanwhile, the spraying liquid is guided to spirally ascend to flow through the liquid inlet pipe, impurities carried in the spraying liquid are thrown out to the outer layer of the spraying liquid under the centrifugal effect, and the spraying liquid is conveyed to the spraying liquid conveying system through the impeller. At the moment, impurities located on the outer layer of the spraying liquid only need to be guided and separated outwards through the liquid guide pipe and the liquid conveying pipe, and the content of the impurities in the backflow spraying liquid can be greatly reduced. According to the PCB etching production spraying liquid circulation conveying pump, on the basis that the spraying liquid backflow speed is increased, the filtering hierarchy times in the spraying liquid backflow process are reduced, and the defects that the spraying liquid backflow speed is low due to the fact that the filtering hierarchy times are too many in the spraying liquid backflow process, and the spraying liquid backflow speed is too high are overcome. And the impurity content in the spraying liquid can be increased due to the fact that the number of filtering layers is too small.

Description

Technical Field

[0001] This invention relates to the field of infusion pumps, and more particularly to a circulating pump for spraying liquid during PCB etching production. Background Technology

[0002] The spray solution circulation pump in PCB etching production is a key piece of equipment for realizing the circulating spraying of etching solution. Its core function is to continuously transport the collected spray solution back to the spray solution delivery system through pumps, achieving the recycling of the spray solution to support efficient and environmentally friendly PCB manufacturing. After completing the etching process, the spray solution needs to undergo multi-stage filtration before being returned to the spray solution delivery system by the circulation pump. However, each stage of filtration reduces the flow rate of the spray solution, resulting in a slower return speed to the spray solution delivery system. Reducing the number of filtration stages increases the impurity content in the spray solution. When the impurity content is high, the hard impurities can not only damage the impeller components of the spray solution circulation pump but also affect the spray etching effect on the PCB board. Summary of the Invention

[0003] To overcome the drawbacks of excessive filtration stages during spray liquid recirculation leading to slow recirculation speed, and insufficient filtration stages increasing impurity content in the spray liquid, this invention provides a PCB board etching production spray liquid circulation pump.

[0004] The technical implementation scheme of this invention is as follows: A PCB board etching production spray liquid circulation pump includes a pump casing, an inlet pipe, an impeller, a main rotating shaft, a main drive gear, a main driven gear, a main motor, a delivery pipe, a guide pipe, a secondary rotating shaft, a secondary driven gear, a secondary motor, a secondary drive gear, and delivery blades; a pump chamber structure is formed inside the pump casing; an outlet channel structure communicating with the pump chamber structure is formed inside the pump casing; an inlet pipe communicating with the pump chamber structure is fixedly connected to the pump casing; several spiral guide structures are provided inside the inlet pipe, which are used to guide the spray liquid to spiral upward flow; an impeller is rotatably connected inside the pump chamber structure of the pump casing, and a filter screen is provided in the inlet structure in the middle of the impeller. A main rotating shaft is rotatably connected inside the pump casing; a driving gear is fixedly connected to the main rotating shaft; a main motor is mounted on the pump casing; the output shaft of the main motor is coaxially fixed with the main rotating shaft; a driving gear is fixedly connected to the impeller; the driving gear meshes with the driving gear; a delivery pipe is fixedly connected inside the pump casing; several guide pipes connecting to the inlet pipe are connected to the delivery pipe; a secondary rotating shaft is rotatably connected between the pump casing and the delivery pipe; a secondary driven gear is fixedly connected to the secondary rotating shaft; a secondary motor is mounted on the pump casing; a secondary power gear is fixedly connected to the output shaft of the secondary motor; the secondary power gear meshes with the secondary driven gear; and conveying blades that pump the spray liquid inside the delivery pipe are fixedly connected to the secondary rotating shaft.

[0005] Furthermore, a conical outer cylinder is fixed inside the inlet pipe; the conical outer cylinder is connected to the inlet structure of the impeller; the conical outer cylinder divides the inlet pipe into a liquid storage chamber structure on the upper side and an inlet channel structure on the lower side, and the liquid guide pipe is connected to the liquid storage chamber structure; several external liquid passage groove structures connecting the liquid storage chamber structure and the liquid inlet channel structure are opened on the conical outer cylinder.

[0006] Furthermore, a flow guide structure is provided at the bottom of the liquid inlet structure in the middle of the impeller, and the flow guide structure covers the upper area of ​​the outer liquid channel structure of the conical outer cylinder.

[0007] Furthermore, a fixing rod is fixed inside the liquid inlet pipe; several spiral guide vanes are fixed on the fixing rod.

[0008] Furthermore, the secondary rotating shaft passes downward through the impeller, and the impeller is rotatably connected to the secondary rotating shaft; a pressing protrusion is fixed to the lower end of the secondary rotating shaft, and the pressing protrusion is located inside the conical outer cylinder.

[0009] Furthermore, several friction plates are fixed to the outer surface of the extrusion bump.

[0010] Furthermore, a booster blade is fixed to the conveying blade, and the booster blade is located below the conical outer cylinder.

[0011] Furthermore, the outlet port of the liquid guide tube is equipped with a filter for removing impurities.

[0012] Furthermore, an electric suction device is installed in the outlet port of the impurity removal filter to increase the liquid flow rate.

[0013] Furthermore, a conical inner cylinder is rotatably connected inside the conical outer cylinder; the conical inner cylinder has internal liquid passage structures that correspond in number and position to the external liquid passage structures, and the internal liquid passage structures are connected to the corresponding external liquid passage structures; an adjusting gear ring is fixedly connected to the conical inner cylinder; an adjusting motor is installed inside the liquid inlet pipe; an adjusting gear is fixedly connected to the output shaft of the adjusting motor; the adjusting gear meshes with the adjusting gear ring.

[0014] This invention relates to a PCB board etching production spray liquid circulation pump. The impeller continuously draws and transports the spray liquid flowing through the inlet pipe into the spray liquid delivery system. At the same time, it guides the spray liquid to spiral upward through the inlet pipe, allowing impurities carried in the spray liquid to be thrown out to the outer layer of the spray liquid under centrifugal force. At this time, it is only necessary to guide and separate the impurities located on the outer layer of the spray liquid outward through the guide pipe and the delivery pipe, which can significantly reduce the impurity content in the returned spray liquid.

[0015] This invention relates to a PCB board etching production spray liquid circulation pump, which achieves faster spray liquid return speed while reducing the number of filtration stages during the spray liquid return process. This overcomes the technical problem that too many filtration stages during the spray liquid return process will result in slow return speed, while too few filtration stages will increase the impurity content in the spray liquid. Attached Figure Description

[0016] Figure 1 A perspective view illustrating the invention according to an embodiment; Figure 2 This is a perspective cross-sectional view of the pump housing and inlet pipe according to an embodiment of the present invention; Figure 3 A perspective view of the impeller of the present invention is provided according to an embodiment. Figure 4 A perspective view of the conical outer cylinder of the present invention is provided according to an embodiment. Figure 5 This is a perspective cross-sectional view of the infusion tube of the present invention, according to an embodiment. Figure 6 The exploded perspective view of the conical outer cylinder and conical inner cylinder of the present invention is shown according to an embodiment.

[0017] Reference numerals: 1-Pump casing, 101-Pump cavity structure, 102-Outlet channel structure, 2-Inlet pipe, 201-Storage cavity structure, 202-Inlet channel structure, 203-Spiral guide structure, 21-Conical outer cylinder, 2101-External liquid passage structure, 22-Conical inner cylinder, 2201-Internal liquid passage structure, 23-Adjusting gear ring, 24-Adjusting motor, 25-Adjusting gear, 3-Impeller, 301-Guide shield Structure: 31-Main rotating shaft, 32-Main driving gear, 33-Main driven gear, 34-Main motor, 41-Infusion tube, 42-Guide tube, 51-Fixing rod, 52-Spiral guide vane, 6-Secondary rotating shaft, 61-Secondary driven gear, 62-Secondary power gear, 63-Secondary motor, 71-Conveying blade, 72-Extrusion protrusion, 73-Friction plate, 74-Pressure booster blade, 8-Impurity removal filter, 9-Electric suction machine. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1: A PCB board etching production spray liquid circulation pump of this example, such as... Figures 1-5As shown, the system includes a pump casing 1, an inlet pipe 2, an impeller 3, a main rotating shaft 31, a main drive gear 32, a main driven gear 33, a main motor 34, a delivery pipe 41, a guide pipe 42, a fixed rod 51, a spiral guide vane 52, a secondary rotating shaft 6, a secondary driven gear 61, a secondary drive gear 62, a secondary motor 63, and conveying blades 71. A pump chamber structure 101 is formed inside the pump casing 1. An outlet channel structure 102 is formed in the pump casing 1, connecting to the pump chamber structure 101, and the outlet channel structure 102 is externally connected to a spray liquid delivery system. An inlet pipe 2, connecting to the pump chamber structure 101, is fixedly connected to the pump casing 1, and the inlet pipe 2 is externally connected to a spray liquid delivery system. The filter has an outlet port; the inlet pipe 2 is equipped with several spiral guide structures 203; an impeller 3 is rotatably connected to the pump chamber structure 101 of the pump casing 1, and a filter screen is provided in the inlet structure of the middle of the impeller 3; a main rotating shaft 31 is rotatably connected to the pump casing 1; a driving gear 32 is fixedly connected to the main rotating shaft 31; a main motor 34 is installed on the pump casing 1; the output shaft of the main motor 34 is fixedly connected to the main rotating shaft 31; a driving gear 33 is fixedly connected to the impeller 3; the driving gear 33 meshes with the driving gear 32; a delivery pipe 41 is fixedly connected to the pump casing 1, and the delivery pipe 41 is connected to a waste liquid treatment device; several... A liquid guide pipe 42; a conical outer cylinder 21 is fixedly connected inside the liquid inlet pipe 2; the conical outer cylinder 21 is connected to the liquid inlet structure in the middle of the impeller 3; the conical outer cylinder 21 divides the liquid inlet pipe 2 into a liquid storage chamber structure 201 on the upper side and a liquid inlet channel structure 202 on the lower side, and all liquid guide pipes 42 are connected to the liquid storage chamber structure 201; several external liquid passage groove structures 2101 connecting the liquid storage chamber structure 201 and the liquid inlet channel structure 202 are opened on the conical outer cylinder 21; a flow guide structure 301 is provided at the bottom of the liquid inlet structure in the middle of the impeller 3, and the flow guide structure 301 covers the external liquid passage groove structure 2101 of the conical outer cylinder 21. The upper region; a fixed rod 51 is fixedly connected inside the inlet pipe 2; several spiral guide vanes 52 are fixedly connected to the fixed rod 51; a secondary rotating shaft 6 is rotatably connected between the pump housing 1 and the inlet pipe 41; a secondary driven gear 61 is fixedly connected to the secondary rotating shaft 6; a secondary motor 63 is installed on the pump housing 1; a secondary power gear 62 is fixedly connected to the output shaft of the secondary motor 63; the secondary power gear 62 meshes with the secondary driven gear 61; two conveying blades 71 are fixedly connected to the secondary rotating shaft 6, and the conveying blades 71 are located inside the inlet pipe 41; a pressure boosting blade 74 is fixedly connected to the conveying blades 71, and the pressure boosting blade 74 is located below the conical outer cylinder 21.

[0020] The working steps of a PCB board etching production spray liquid circulation pump in this embodiment are as follows.

[0021] The spray liquid that has been filtered in the external spray liquid filtration equipment does not flow to the next stage of spray liquid filtration equipment. Instead, it flows directly through the inlet pipe 2 and the conical outer cylinder 21, and enters the impeller 3 through the guide shroud structure 301. During this process, the main motor 34 drives the main rotating shaft 31 to rotate and the drive gear 32 to rotate. The drive gear 32 meshes with the drive gear 33 to drive the impeller 3 to rotate rapidly. The impeller 3 continuously pumps the spray liquid back to the spray liquid conveying system along the pump chamber structure 101 and the outlet channel structure 102, allowing the spray liquid to participate in the circulating spraying operation.

[0022] During the flow of the spray liquid through the inlet channel structure 202 of the inlet pipe 2, the spray liquid spirals upward under the guidance of the spiral guide structure 203 and the spiral guide vane 52 of the inlet pipe 2 and enters the conical outer cylinder 21. At the same time, the spirally rising spray liquid throws impurities to the outer layer area under centrifugal force. Afterward, as the spirally rising spray liquid flows upward through the conical outer cylinder 21, the outer layer area of ​​the spray liquid carries the thrown-out impurities through the outer liquid channel structure 2101 of the conical outer cylinder 21 and enters the liquid storage chamber structure 201 of the inlet pipe 2. It then flows into the delivery pipe 41 along the guide pipe 42. At the same time, the auxiliary motor 63 drives the auxiliary power gear 62 to rotate. The auxiliary power gear 62 meshes with the auxiliary driven gear 61, which drives the auxiliary rotating shaft 6, the conveying blade 71 and the pressurizing blade 74 to rotate rapidly. The conveying blade 71 then pushes the liquid into the delivery pipe 41. The spray liquid and impurities carried in pipe 41 are transported to an external waste liquid treatment device. At the same time, the booster blade 74 continuously applies an upward pumping force to the spray liquid in the inlet channel structure 202 of the inlet pipe 2. Under the combined action of the conveying blade 71 and the booster blade 74, the outer layer of the spray liquid can smoothly pass through the outer liquid channel structure 2101 of the conical outer cylinder 21 and the liquid storage chamber structure 201 of the inlet pipe 2 and enter the delivery pipe 41. Only the non-outer layer of the spray liquid will pass through the conical outer cylinder 21 and be pumped back to the external spray liquid delivery system by the impeller 3. This completes the process of separating the impurities from the spray liquid phase in the external spray liquid delivery system, thereby reducing the number of filtration stages during the spray liquid return process while accelerating the return speed of the spray liquid.

[0023] Example 2, as Figures 1-5As shown, based on the above embodiment 1, in this embodiment, the secondary rotating shaft 6 passes downward through the impeller 3, and the impeller 3 is rotatably connected to the secondary rotating shaft 6; the lower end of the secondary rotating shaft 6 is fixedly connected to the extrusion protrusion 72, and the extrusion protrusion 72 is located inside the conical outer cylinder 21; a plurality of friction plates 73 are fixedly connected to the outer surface of the extrusion protrusion 72; during the continuous flow of the spray liquid through the conical outer cylinder 21, the secondary rotating shaft 6 drives the extrusion protrusion 72 and the friction plates 73 to rotate, and the rotating friction plates 73 continuously apply rotational friction force in the direction of rotation to the spirally rising spray liquid, thereby enhancing the spiral rotational flow effect of the spray liquid in the conical outer cylinder 21. At the same time, the spray liquid is jointly extruded by the extrusion protrusion 72 and the upwardly contracting conical outer cylinder 21, which increases the internal extrusion pressure of the spray liquid and increases the flow rate of the spiral rotation of the spray liquid, thereby enhancing the rotational centrifugal effect of the spray liquid and improving the centrifugal separation effect of impurities being thrown out to the outer layer of the spirally flowing spray liquid.

[0024] Example 3, as Figures 1-6As shown, based on the above embodiment 1, the liquid outlet of the liquid guide pipe 42 in this embodiment is equipped with a purification filter 8, and the liquid outlet of the purification filter 8 is connected to the storage tank of the spray liquid delivery system through a pipeline; an electric suction machine 9 for increasing the liquid flow rate is installed inside the liquid outlet of the purification filter 8; a conical inner cylinder 22 is rotatably connected inside the conical outer cylinder 21; a plurality of inner liquid passage structures 2201 corresponding to the outer liquid passage structure 2101 are opened on the conical inner cylinder 22, and the inner liquid passage structures... 2201 connects to the corresponding external liquid tank structure 2101; an adjusting gear ring 23 is fixedly connected to the conical inner cylinder 22; an adjusting motor 24 is installed inside the liquid inlet pipe 2; an adjusting gear 25 is fixedly connected to the output shaft of the adjusting motor 24; the adjusting gear 25 meshes with the adjusting gear ring 23; the spray liquid flowing out from the liquid guide pipe 42 continuously enters the impurity removal filter 8, where the impurity removal filter 8 performs high-precision filtration on the impurities carried in the spray liquid, and the impurities that have completed the high-precision filtration process flow back to the external spray liquid through the pipe. In the liquid storage tank of the delivery system, waste of spray liquid is reduced. At the same time, the electric suction machine 9 draws the spray liquid flowing through the impurity removal filter 8, increasing the flow rate of the spray liquid through the impurity removal filter 8. In addition, during regular maintenance, the adjusting motor 24 controls the adjusting gear 25 to rotate. The adjusting gear 25 meshes with the adjusting gear ring 23 to drive the conical inner cylinder 22 to rotate until the conical inner cylinder 22 blocks the outer liquid passage structure 2101 of the conical outer cylinder 21, thus opening the outlet port of the impurity removal filter 8 through the external cleaning pipe. The washing liquid conveying equipment connects the inlet port of the inlet pipe 2 to the waste liquid treatment equipment. Then, the external washing liquid conveying equipment continuously conveys the washing liquid into the impurity removal filter 8 in reverse. The washing liquid is flushed in reverse along the delivery pipe 41, the guide pipe 42, the conical inner cylinder 22 and the inlet pipe 2. This cleans the impurities remaining in the impurity removal filter 8, the delivery pipe 41, the guide pipe 42, the conical inner cylinder 22 and the inlet pipe 2. The washing liquid, carrying the impurities, flows to the external waste liquid treatment equipment.

[0025] The above embodiments are provided for those skilled in the art to implement or use the present invention. Those skilled in the art can make various modifications or changes to the above embodiments without departing from the inventive concept of the present invention. Therefore, the protection scope of the present invention is not limited to the above embodiments, but should be the maximum scope that conforms to the innovative features mentioned in the claims.

Claims

1. A PCB board etching production spray liquid circulation pump, comprising a pump housing (1); a pump chamber structure (101) is provided inside the pump housing (1); and a liquid outlet channel structure (102) communicating with the pump chamber structure (101) is provided in the pump housing (1); characterized in that: It also includes an inlet pipe (2), an impeller (3), a main rotating shaft (31), a driving gear (32), a driving and driven gear (33), a main motor (34), an inlet pipe (41), and a guide pipe (42); the inlet pipe (2) is fixedly connected to the pump housing (1) and connects to the pump chamber structure (101); the inlet pipe (2) is provided with several spiral guide structures (203), which are used to guide the spray liquid to spiral upward flow; the impeller (3) is rotatably connected to the pump chamber structure (101) of the pump housing (1), and the inlet structure of the impeller (3) is provided with a filter screen; the main rotating shaft (31) is rotatably connected to the pump housing (1); the driving gear (32) is fixedly connected to the main rotating shaft (31); the main motor (34) is installed on the pump housing (1); the main rotating shaft (31) is rotatably connected to the pump housing (1); the main rotating shaft (31) is rotatably connected to the pump housing (1) and connects to the pump chamber structure (101); the main rotating shaft (31) is rotatably connected to the pump chamber structure (101), connects ... The pump housing (1) is connected to the output shaft of the main motor (34); the impeller (3) is fixedly connected to the main driven gear (33); the main driven gear (33) meshes with the main drive gear (32); the pump housing (1) is fixedly connected to the inlet pipe (41); the inlet pipe (41) is connected to several guide pipes (42) that connect to the inlet pipe (2); the pump housing (1) and the inlet pipe (41) are rotatably connected to a secondary rotating shaft (6); the secondary rotating shaft (6) is fixedly connected to the secondary driven gear (61); the pump housing (1) is equipped with a secondary motor (63); the output shaft of the secondary motor (63) is fixedly connected to the secondary drive gear (62); the secondary drive gear (62) meshes with the secondary driven gear (61); the secondary rotating shaft (6) is fixedly connected to a conveying blade (71) that pumps the spray liquid inside the inlet pipe (41).

2. A PCB board etching production spray liquid circulation pump according to claim 1, characterized in that: A conical outer cylinder (21) is fixed inside the inlet pipe (2); the conical outer cylinder (21) is connected to the inlet structure of the impeller (3); the conical outer cylinder (21) divides the inlet pipe (2) into a liquid storage cavity structure (201) located on the upper side and an inlet channel structure (202) located on the lower side, and the guide pipe (42) is connected to the liquid storage cavity structure (201); a number of external liquid passage groove structures (2101) connecting the liquid storage cavity structure (201) and the inlet channel structure (202) are opened on the conical outer cylinder (21).

3. A PCB board etching production spray liquid circulation pump according to claim 2, characterized in that: The bottom of the liquid inlet structure in the middle of the impeller (3) is provided with a flow guide structure (301), and the flow guide structure (301) covers the upper area of ​​the outer liquid channel structure (2101) of the conical outer cylinder (21).

4. A PCB board etching production spray liquid circulation pump according to claim 1, characterized in that: A fixing rod (51) is fixed inside the liquid inlet pipe (2); several spiral guide vanes (52) are installed on the fixing rod (51).

5. A PCB board etching production spray liquid circulation pump according to claim 1, characterized in that: The secondary rotating shaft (6) passes downward through the impeller (3) and is rotatably connected to the impeller (3); the lower end of the secondary rotating shaft (6) is fixed with a pressing protrusion (72), and the pressing protrusion (72) is located inside the conical outer cylinder (21).

6. A PCB board etching production spray liquid circulation pump according to claim 5, characterized in that: Several friction plates (73) are fixed to the outer surface of the extrusion protrusion (72).

7. A PCB board etching production spray liquid circulation pump according to claim 2, characterized in that: A booster blade (74) is fixedly attached to the conveying blade (71), and the booster blade (74) is located below the conical outer cylinder (21).

8. A PCB board etching production spray liquid circulation pump according to any one of claims 1-7, characterized in that: The outlet port of the liquid guide tube (42) is equipped with a filter (8) for filtering impurities.

9. A PCB board etching production spray liquid circulation pump according to claim 8, characterized in that: An electric suction machine (9) for increasing the liquid flow rate is installed in the liquid outlet port of the impurity removal filter (8).

10. A PCB board etching production spray liquid circulation pump according to claim 2, characterized in that: A conical inner cylinder (22) is rotatably connected inside a conical outer cylinder (21); an inner liquid channel structure (2201) is provided on the conical inner cylinder (22) in a number and position corresponding to the outer liquid channel structure (2101), and the inner liquid channel structure (2201) is connected to the corresponding outer liquid channel structure (2101); an adjusting gear ring (23) is fixedly connected to the conical inner cylinder (22); an adjusting motor (24) is installed inside the liquid inlet pipe (2); an adjusting gear (25) is fixedly connected to the output shaft of the adjusting motor (24); the adjusting gear (25) meshes with the adjusting gear ring (23).

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