PCB grinding spray water circulation filtering equipment and method

Abstract

The application relates to the technical field of filtering equipment, and discloses a PCB grinding, spraying water circulation filtering equipment and method to solve the problem of poor filtering effect of the existing filtering equipment.The equipment comprises a water tank, a filtering box, a clean water pump, a sewage pump, a first filter and a second filter which are installed on the water tank, and a clean water tank and a sewage tank are separated in the water tank; the sewage pump is used for pumping the sewage in the sewage tank into the filtering box; the clean water pump is provided with a clean water pump water inlet and a clean water pump water outlet, the clean water pump water inlet is arranged in the clean water tank, the clean water pump water outlet is connected with the inlet of the first filter through a pipeline, the outlet of the first filter is connected with the inlet of the second filter, the outlet of the second filter is connected with a spraying pipe, the spraying pipe is used for being connected with the water inlet of a grinding plate machine spraying system, and the sewage tank is connected with a backflow pipe which is used for being connected with the water outlet of the grinding plate machine spraying system.Through the triple filtering, the impurities and pollutants in the waste water can be effectively removed, and the filtering effect is improved.

Description

Technical Field

[0001] This invention relates to the field of filtration equipment technology, and more specifically, to a PCB grinding spray water circulation filtration device and method. Background Technology

[0002] Grinding mills produce a lot of debris during grinding, including the loss of the abrasive powder itself. The spray system flushes the wastewater, which then flows into a filtration system. Industrial water is expensive, and the wastewater contains copper and other heavy metals, so it cannot be discharged directly and must be filtered. The filtration system recovers copper, recycles industrial water, and reduces environmental pollution.

[0003] The PCB grinding spray water circulation and filtration equipment is a spray water treatment device used in the PCB grinding process. Its technological background stems from the traditional PCB grinding process, which generates a large amount of wastewater containing numerous metal ions and organic pollutants. Direct discharge of this wastewater would cause serious environmental pollution. To address this problem, the PCB grinding spray water circulation and filtration equipment was invented. This equipment can effectively filter and treat wastewater, achieving recycling. Furthermore, by improving the grinding process and optimizing the equipment structure, this equipment can increase grinding efficiency and reduce grinding costs, thereby improving the economic benefits for enterprises.

[0004] In existing technologies, the PCB polishing process generates a large amount of heat, causing the wastewater temperature to rise, which affects filtration efficiency and quality. Increased wastewater temperature accelerates the contamination and aging of the filter media, shortening its lifespan and potentially negatively impacting equipment stability and lifespan. Furthermore, existing technologies suffer from poor filtration leading to unclean circulating water containing numerous impurities and pollutants. These impurities and pollutants enter the wastewater, causing a decline in wastewater quality and impacting the environment. Additionally, poor filtration results in circulating water containing a large amount of impurities, which then re-enter the filtration system, further reducing filtration effectiveness.

[0005] In addition, such as Figure 9 As shown, conventional filters are located outside the housing, and water adheres to the filter cartridges. When replacing the filter cartridges, water drips onto the outside of the housing, which can easily wet the passageway or cause other problems. Summary of the Invention

[0006] The purpose of this invention is to provide a PCB grinding spray water circulation filtration device and method to solve the problem of poor filtration effect of existing filtration devices.

[0007] To achieve the above objectives, the specific technical solution of the PCB grinding spray water circulation filtration device and method of the present invention is as follows:

[0008] As one aspect of the present invention, a PCB grinding spray water circulation filtration device is provided, including a water tank and a filter box installed on the water tank, a clean water pump, a wastewater pump, a primary filter, and a secondary filter. The water tank is divided into a clean water tank and a wastewater tank. The wastewater pump is used to pump wastewater from the wastewater tank into the filter box. The clean water pump is provided with a clean water pump inlet and a clean water pump outlet. The clean water pump inlet is located in the clean water tank. The clean water pump outlet is connected to the inlet of the primary filter through a pipeline. The outlet of the primary filter is connected to the inlet of the secondary filter. The outlet of the secondary filter is connected to a spray pipe, which is used to connect to the inlet of the grinding machine spray system. The wastewater tank is connected to a return pipe, which is used to connect to the outlet of the grinding machine spray system. The triple filtration can effectively remove impurities and pollutants from wastewater, improve filtration efficiency, and reduce operating costs.

[0009] Furthermore, the filter box includes a box body, which is divided into left and right parts. The filter box is provided with a top plate and a bottom plate respectively. Between the top plate and the bottom plate, there is a pair of arc-shaped filter screens and a box cover assembly that wraps the arc-shaped filter screens. The arc-shaped filter screens are wavy and have mesh holes. A reinforcing pipe is provided on the outside of the arc-shaped filter screens. A sewage inlet is provided on the top plate.

[0010] Furthermore, the water tank is equipped with cooling coils for lowering the water temperature. By introducing chilled water through the cooling coils, the water temperature can be effectively reduced, preventing the wastewater temperature from rising due to the large amount of heat generated during PCB polishing, which would affect filtration efficiency and quality, thereby improving filtration efficiency and quality. At the same time, it can also effectively prevent the problem of increased temperature accelerating the contamination and aging of the filter media, thus shortening the service life of the filter media.

[0011] Furthermore, the clean water pump is fixed in the water tank by a clean water pump mounting plate. The clean water pump mounting plate is also equipped with a water level sensing component, including water replenishment stop probe, water replenishment start probe, water pump stop probe and neutral wire probe of different lengths, with the water replenishment stop probe, water replenishment start probe, water pump stop probe and neutral wire probe in order from shortest to longest.

[0012] In another aspect, a PCB grinding spray water circulation filtration method is provided, characterized by comprising the following steps:

[0013] Step S1: Set up a water tank and divide it into a clean water tank and a wastewater tank;

[0014] Step S2: Clean water is pumped from the clean water tank into the primary filter by a clean water pump. The clean water then enters the secondary filter from the primary filter and is sent to the inlet of the grinding machine spray system.

[0015] Step S2: Wastewater from the grinding mill spray system is recycled to the wastewater tank via the return pipe;

[0016] Step S3: Sewage is pumped into the filter box using a sewage pump, and after filtration in the filter box, it enters the clear water tank.

[0017] Step S4 leads to step S2, and the cycle repeats. This process reduces the consumption of clean water, increases the efficiency of recycled water utilization, and lowers water costs.

[0018] Furthermore, a cooling coil is installed inside the water tank to cool the water.

[0019] The beneficial effects provided by this invention are as follows:

[0020] This invention provides a PCB polishing spray water circulation filtration device and method, featuring three-stage filtration: a filter box as the primary filtration stage, a first-stage filter, and a second-stage filter, each containing filter cotton cores. The filter box has a water inlet and contains an arc-shaped filter screen and industrial filter cloth bags, improving filtration efficiency. Additionally, a clear water tank is equipped with a circulating cooling coil; circulating chilled water lowers the tank temperature. A temperature controller controls the on / off flow of chilled water via an electromagnetic water valve on the pipeline, producing spray water at a suitable temperature. Water level probes are installed in both the clear water and wastewater tanks to detect water levels and control the start / stop of the water pump. Attached Figure Description

[0021] Figure 1 The structural diagram of the PCB grinding spray water circulation filtration device provided by the present invention;

[0022] Figure 2 The water tank structure diagram provided by this invention;

[0023] Figure 3 The filter box structure diagram provided by the present invention;

[0024] Figure 4 This is a structural diagram of the left side of the filter box provided by the present invention;

[0025] Figure 5 The structural diagram of the filter box on the right side provided by the present invention;

[0026] Figure 6 The cooling coil structure diagram provided by the present invention;

[0027] Figure 7 The structural diagram of the water pump provided by this invention;

[0028] Figure 8 The sewage pump structure diagram provided by the present invention;

[0029] Figure 9 This is a typical layout diagram of the filter.

[0030] In the picture:

[0031] 10. Filter box; 20. Water tank; 40. Electrical control box; 50. Clean water pump; 60. Sewage pump; 80. Cooling coil; 11. Arc-shaped filter screen; 12. Sewage inlet; 13. Reinforcing pipe; 14. Welded cover assembly;

[0032] 21. Clear water tank; 22. Sewage tank; 31. Primary filter; 32. Secondary filter; 35. Clear water pipe; 36. Spray water pipe; 37. Ice water inlet pipe; 38. Sewage pipe; 39. Spray water return pipe; 51. Clear water pump mounting plate; 52. Pump outlet; 53. Water replenishment stop probe; 54. Water replenishment start probe; 55. Pump stop probe; 56. Neutral probe; 57. Clear water pump inlet; 61. Sewage pump mounting plate; 62. Sewage pump outlet; 63. Sewage overflow alarm probe; 64. Pump start probe; 65. Pump stop probe; 66. Zero point probe; 67. Sewage pump inlet; 81. Ice water inlet; 82. Ice water outlet. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention.

[0034] See Figure 1 The present invention provides a PCB grinding spray water circulation filtration device, including a water tank 20 and a filter box 10, a clean water pump 50, a sewage pump 60, a primary filter 31 and a secondary filter 32 installed on the water tank 20. The water tank 20 is divided into a clean water tank 21 and a sewage tank 22. A cooling coil 80 is provided in one of the clean water tanks 21. The filter box 10, the clean water pump 50, the sewage pump 60, the primary filter 31, the secondary filter 32 and the cooling coil 80 are connected by pipelines.

[0035] See Figures 3 to 5 The filter box 10 mainly consists of three parts, including the box body ( Figure 3 The outer casing was not shown in the image; specifically... Figure 1 The filter box 10 is divided into left and right parts. A top plate and a bottom plate are respectively installed on the top and bottom of the filter box 10. Between the top and bottom plates is a pair of arc-shaped filter screens 11 and a cover assembly 14 that wraps around the arc-shaped filter screens 11. The arc-shaped filter screens 11 are wavy and have densely packed mesh holes. A reinforcing pipe 13 is installed on the outer side of the arc-shaped filter screens 11. A sewage inlet 12 is provided on the top plate.

[0036] Two drain outlets 12 are evenly distributed at the bottom right end of the water tank 20, which can discharge pollutants in the wastewater in batches, reduce the amount of pollutants discharged, and effectively improve the wastewater treatment efficiency.

[0037] The housing is divided into left and right parts, with a pair of arc-shaped filters 11 inside. The advantage is that one side can be used while the other side is maintained, or only one side can be used until one side is worn out, or both sides can be used simultaneously. The arc-shaped filters 11 are arranged with small holes, each with a diameter of 3 mm.

[0038] The clean water pump 50 has a clean water pump inlet 57 and a clean water pump outlet 52. The clean water pump inlet 57 is located in the clean water tank 22. The clean water pump outlet 52 is connected to the primary filter 31 through a pipeline. The primary filter 31 is connected to the secondary filter 32. The secondary filter 32 is connected to a spray pipe 36. The spray pipe 36 is connected to the grinding machine spray system. The sprayed wastewater is connected to the wastewater tank 22 through a return pipe 39.

[0039] The sewage pump 60 has a sewage pump inlet 67 and a sewage pump outlet 62. The sewage pump inlet 67 is located in the sewage tank 22, and the sewage pump outlet 62 is connected to the sewage inlet 11 through a pipeline.

[0040] After the clear water tank 21 is filled with water, the equipment is started. The clear water pump 50 pumps the clear water through the primary filter 31 and the secondary filter 32 into the grinding equipment to spray the PCB board, and then returns it to the sewage tank 22. The sewage pump 60 starts and pumps the sewage into the filter box 10. The arc-shaped filter screen and the sealed filter bag in the filter box 10 retain the particulate matter in the sewage. The filter bag is made of industrial filter cloth and can filter impurities as small as 5 microns. After filtration, 70% of the impurities are removed, and the filtered water flows back into the clear water tank 21, and the cycle continues.

[0041] The primary filter 31 and secondary filter 32 are equipped with filter cotton cores, which can filter impurities as small as 1 micron, and provide two-stage filtration. The primary filter 31 and secondary filter 32 are installed vertically above the water tank 20. The filter cotton cores can be replaced by opening the covers on the primary filter 31 and secondary filter 32. The filter cotton cores are covered with water, so the water will drip into the water tank 20. In contrast, the filters in existing equipment are located outside the water tank, and replacing the filter cotton cores can easily wet the passageway.

[0042] The clean water pump 50 includes a clean water pump mounting plate 51 for fixing the pump body, which is fixed in the water tank 20. A water level sensing assembly is also installed on the clean water pump mounting plate 51, including a water replenishment stop probe 53, a water replenishment start probe 54, a water pump stop probe 55, and a neutral wire probe 56 for grounding, all of varying lengths. The water replenishment stop probe 53, water replenishment start probe 54, water pump stop probe 55, and neutral wire probe 56 are arranged in ascending order of length. Water replenishment stops when the water level submerges the water replenishment stop probe 53; water replenishment starts when the water level is lower than the water replenishment start probe 54; and the water pump stops when the water level submerges the water pump stop probe 55. The pumped water then enters the filter box.

[0043] Initially, water tank 20 is empty, so clean water must be added. Tap water is the shortest option. The water replenishment stop probe 53 indicates the highest water level. The neutral probe 56 is the longest and grounded. The water pump stop probe 55 indicates the lowest water level; the pump will stop if the water level falls below this level. The bottom of the water replenishment start probe 54 indicates the water level; water replenishment should begin when the water level is below this level. Water replenishment stops when the water level reaches the bottom of the water replenishment stop probe 53.

[0044] By detecting the water level, the following strategy is defined:

[0045] The first strategy is to stop the water pump when the water level is between the pump stop probe 55 and the neutral probe 56.

[0046] The second strategy is to stop water replenishment when the water level is between the water pump stop probe 55 and the water replenishment start probe 54.

[0047] The third strategy is to start water replenishment when the water level is between the water replenishment stop probe 53 and the water replenishment start probe 54.

[0048] The fourth strategy is to stop the water supply pump when the water level is 53 above the water supply stop probe.

[0049] A solenoid valve and a manual valve are installed in parallel on the water pipe used for water replenishment. When the machine is first installed, the manual valve is used for water replenishment, and then the solenoid valve can be used for automatic control. The simultaneous installation of both a solenoid valve and a manual valve also facilitates maintenance and replacement.

[0050] See Figure 8The sewage pump 60 includes a sewage pump mounting plate 61 for fixing the pump body, which is fixed in the water tank 20. The sewage pump mounting plate 61 is also equipped with a water level sensing component, including sewage overflow alarm probes 63 of varying lengths, a pump start probe 64, a pump stop probe 65, and a grounding zero-point probe 66. The sewage overflow alarm probes 63, 64, 65, and 66 are arranged in ascending order of length. An alarm is triggered when the water level submerges the sewage overflow alarm probe 63; when the water level is between the pump start probe 64 and the sewage overflow alarm probe 63, the pump starts, and the pumped sewage enters the filter box 10; when the water level is between the pump start probe 64 and the pump stop probe 65, the pump stops.

[0051] After prolonged use, the water pump generates heat, and the spray circuit board itself acts as a coolant, so the wastewater after spraying also contains heat. Especially in summer, the water temperature can reach 60 to 70 degrees Celsius. (See also...) Figure 2 and Figure 6 To lower the water temperature, a cooling coil 80 is installed in the clear water tank 21. The cooling coil 80 has an ice water inlet 81 and an ice water outlet 82. Circulating ice water lowers the water temperature in the clear water tank 21. The ice water temperature is around 10 degrees Celsius, but the temperature cannot be too low, as excessively low water temperatures in the clear water tank 21 are detrimental to spraying. Therefore, a solenoid valve is also installed to control the ice water flow. For example, when the water temperature is below 30 degrees Celsius, further cooling is not needed, and the ice water flow is stopped. When the water temperature reaches 40 degrees Celsius, ice water flow resumes. The cooling coil 80 can also be installed in the wastewater tank 22.

[0052] In summary, this invention provides a PCB polishing spray water circulation filtration device and method, featuring three-stage filtration: a filter box as the primary filtration stage, and primary and secondary filters, each containing filter cotton cores. The filter box has a water inlet and contains an arc-shaped filter screen and industrial filter cloth bags. The clean water tank is equipped with a circulating cooling coil; introducing chilled water lowers the tank temperature. A temperature controller controls the flow of chilled water via a solenoid valve on the pipeline, producing spray water at a suitable temperature. Water level probes are installed in both the clean water and wastewater tanks to detect water levels and control the start and stop of the water pumps.

[0053] In summary, this invention provides a PCB grinding spray water circulation filtration device and method. After the clear water tank is filled with water, the device is started. The clear water pump pumps the clear water through a primary filter and a secondary filter. The clear water then enters the grinding equipment through the spray water pipe to spray the PCB board, and flows back to the wastewater tank through the spray water return port. The wastewater pump is started, pumping the wastewater into the filter box. The arc-shaped filter screen and sealed filter bag in the filter box retain particulate matter in the wastewater. The filtered water then flows back into the clear water tank, and the cycle continues. This reduces the consumption of clear water, increases the utilization efficiency of circulating water, and reduces the load on the device.

[0054] It features a three-stage filtration system: a filter box as the primary filter, and two secondary filters, each containing filter cotton cores. The filter box has a water inlet and contains an arc-shaped filter screen and industrial filter cloth bags, improving filtration efficiency. Additionally, the clear water tank is equipped with a circulating cooling coil; circulating chilled water lowers the tank temperature. A temperature controller controls the flow of chilled water via a solenoid valve on the pipeline, producing spray water at a suitable temperature. Both the clear water and wastewater tanks are equipped with water level probes to monitor water levels and control the pump's start and stop.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A PCB grinding spray water circulation filtration device, characterized in that, Includes a water tank (20) and a filter box (10) installed on the water tank (20), a clean water pump (50), a sewage pump (60), a primary filter (31), and a secondary filter (32). The water tank (20) is divided into a clean water tank (21) and a sewage tank (22). The sewage pump (60) is used to pump sewage from the sewage tank (22) into the filter box (10). The clean water pump (50) is equipped with a clean water pump inlet (57) and a clean water pump outlet (52). 7) Set in the clear water tank (21), the outlet (52) of the clear water pump is connected to the inlet of the primary filter (31) through a pipeline, the outlet of the primary filter (31) is connected to the inlet of the secondary filter (32), the outlet of the secondary filter (32) is connected to a spray pipe (36), the spray pipe (36) is used to connect to the inlet of the grinding machine spray system, the sewage tank (22) is connected to a return pipe (39), the return pipe (39) is used to connect to the outlet of the grinding machine spray system; The filter box (10) includes a box body, which is divided into left and right parts. The filter box (10) is provided with a top plate and a bottom plate respectively. Between the top plate and the bottom plate, there is an industrial filter cloth bag, a pair of arc-shaped filter screens (11) and a box cover assembly (14) that wraps the arc-shaped filter screens (11). The arc-shaped filter screens (11) are wavy and have mesh holes. A reinforcing pipe (13) is provided on the outside of the arc-shaped filter screens (11). A sewage inlet (12) is provided on the top plate. A cooling coil (80) for cooling the water temperature is provided in the water tank (20).

2. The PCB grinding spray water circulation filtration equipment according to claim 1, characterized in that, The clean water pump (50) is fixed in the water tank (20) by the clean water pump fixing plate (51). The clean water pump fixing plate (51) is also equipped with a water level sensing component, including water replenishment stop probe (53), water replenishment start probe (54), water pump stop probe (55) and neutral wire probe (56) of different lengths. The water replenishment stop probe (53), water replenishment start probe (54), water pump stop probe (55) and neutral wire probe (56) are arranged from shortest to longest.

3. The PCB grinding spray water circulation filtration equipment according to claim 1, characterized in that, The primary filter (31) and the secondary filter (32) are vertically installed directly above the water tank (20), and the filter box (10) is placed above the water tank.

4. A PCB grinding spray water circulation filtration method, based on the PCB grinding spray water circulation filtration equipment as described in claim 1, characterized in that, Includes the following steps: Step S1: Clean water is pumped from the clean water tank (21) into the primary filter (31) by the clean water pump (50). The clean water then enters the secondary filter (32) from the primary filter (31) and is sent to the inlet of the grinding machine spray system. Step S2: Wastewater from the grinding mill spray system is collected into the wastewater tank (22) through the return pipe (39); Step S3: Sewage is pumped into the filter box (10) by the sewage pump (60), and after being filtered by the filter box (10), it enters the clear water tank (21); Step S4, proceed to step S2, and repeat.

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