A waste cutting fluid filter cartridge

Abstract

The utility model relates to waste cutting fluid filter equipment technical field, concretely relates to a waste cutting fluid filter cartridge. Waste cutting fluid filter cartridge includes back flush pipe and cylinder, and is equipped with filter cavity between back flush pipe and cylinder. The lateral wall of cylinder is equipped with a plurality of filter holes that communicate with filter cavity. The outer surface of back flush pipe is installed with a plurality of ferrules along its axial direction, and the ferrule is used for separating filter cavity into a plurality of cavities. The axial direction of back flush pipe is also equipped with a plurality of groups of flushing holes, and each flushing hole respectively communicates back flush pipe and cavity. The utility model sets up back flush pipe, and the outer surface of back flush pipe is provided with a plurality of ferrules, and the adjacent two ferrules can separate filter cavity into a plurality of cavities, so that the back flush airflow that enters the upper end of back flush pipe can pass through filter hole along the inner wall of cylinder to the impurities adhered to the outer surface of cylinder, and back flush, which can back flush cylinder in time without affecting the filtration of filtrate, avoids its blockage.

Description

Technical Field

[0001] This utility model relates to the technical field of waste cutting fluid filtration equipment, specifically to a waste cutting fluid filter cartridge. Background Technology

[0002] Metal chips removed from machine tools in machining workshops often contain a large amount of cutting fluid. This cutting fluid is formed during the dehydration, drying, and pressing processes of the metal chips, resulting in contaminated waste cutting fluid. Waste cutting fluid mainly contains solid particles such as chip powder and sand, leaked machine tool oil, and oil stains from the workpiece surface. In practical applications, removing these contaminants and sterilizing / inhibiting the bacteria can restore the cutting fluid's functionality, allowing it to be reused in machining processes. Current technology for recycling waste cutting fluid typically uses waste cutting fluid filters. However, due to the large number of solid particles and oil stains present in the waste cutting fluid, filtration through these filters easily leads to clogging, preventing effective removal of impurities. Utility Model Content

[0003] In order to solve the technical problem that existing waste cutting fluid filter cartridges are prone to clogging when filtering waste cutting fluid, this utility model provides a waste cutting fluid filter cartridge.

[0004] This utility model is achieved using the following technical solution: a waste cutting fluid filter cartridge, comprising a backflushing pipe and a hollow cylinder sleeved on the outside of the backflushing pipe, with a filter cavity between the backflushing pipe and the cylinder; the side wall of the cylinder is provided with multiple filter holes, each filter hole connecting to the filter cavity; the lower end of the backflushing pipe is a sealed structure and the upper end is provided with an opening; multiple collars are installed at equal intervals along the axial direction of the outer surface of the backflushing pipe, the collars being used to divide the filter cavity into multiple chambers; adjacent collars are used to guide the airflow entering the backflushing pipe through the chamber to the inner wall of the cylinder and discharge through the filter holes, thereby forming multiple sets of L-shaped backflushing channels; the collars are provided with multiple through holes for connecting adjacent chambers; the axial direction of the backflushing pipe is also provided with multiple sets of flushing holes, each set of flushing holes having multiple numbers, each flushing hole connecting the backflushing pipe and the chamber respectively.

[0005] As a further improvement of this utility model, both the cylinder and the backwash pipe are cylindrical structures, and the flushing holes in the same group are on the same circumference of the backwash pipe.

[0006] In a typical embodiment of this utility model, the spacing between two adjacent sets of flushing holes along the axial direction of the backwash pipe is different, and multiple spacings gradually increase from the lower end to the upper end of the backwash pipe.

[0007] In a typical embodiment of this utility model, the through holes on two adjacent collars are arranged in an alternating manner in the vertical direction.

[0008] As a further improvement of this utility model, the through hole is set on the outermost side of the collar, and the through hole has a semi-circular arc structure.

[0009] As a further improvement of this utility model, the outer surface of the cylinder is also covered with a filter screen, which is attached to the outer surface of the cylinder, and the pore size of the filter screen is smaller than that of the filter hole.

[0010] As a further improvement of this utility model, a mounting plate is fixedly installed on the top of the backwash pipe, and an air inlet pipe is provided on the mounting plate, which is connected to the backwash pipe. The upper end of the cylinder is fixedly installed on the mounting plate, and the lower end of the cylinder is provided with a liquid outlet, which is connected to the filter chamber.

[0011] As a further improvement of this utility model, the waste cutting fluid filter cartridge also includes a pump connected to the air inlet pipe, which is used to transport the backwash gas or liquid through the air inlet pipe to the backwash pipe.

[0012] In a typical technical solution of this utility model, the outer surface of the filter cartridge is uniformly coated with a hydrophilic and oleophobic nano-coating.

[0013] In a typical technical solution of this utility model, the pore size of the filter screen ranges from 0.1 mm to 1 mm. The pore size of the filter holes ranges from 2 mm to 10 mm. The pore size of the rinsing holes ranges from 1 mm to 5 mm.

[0014] The technical solution provided by this utility model has the following beneficial effects:

[0015] (1) The present invention provides a waste cutting fluid filter cartridge for filtering waste cutting fluid. By setting a backwash pipe in the cartridge body and setting multiple collars on the outer surface of the backwash pipe, two adjacent collars can divide the filter chamber into multiple chambers, so that the backwash airflow entering from the upper end of the backwash pipe can backwash the impurities adhering to the outer surface of the cartridge body through the filter holes along the horizontal chamber. This setting can backwash the cartridge body in a timely manner without affecting the filtration of the filtrate, thus preventing it from becoming blocked. Therefore, the waste cutting fluid filter cartridge provided by this solution can effectively filter waste cutting fluid.

[0016] (2) The present invention provides a waste cutting fluid filter cylinder, which, by setting multiple collars, makes the backwash airflow in the backwash pipe not flow upward along the filter cavity, but will change from vertical downward flow to horizontal flow along the cavity between two adjacent collars, so as to realize the reverse straight flushing of the filter hole from the inside of the cylinder, thereby achieving the purpose of effectively backwashing the cylinder. Attached Figure Description

[0017] Figure 1 A perspective view of the waste cutting fluid filter cartridge provided by this utility model (the mesh size of the filter screen is not shown).

[0018] Figure 2 The front view of the waste cutting fluid filter cartridge provided by this utility model (the mesh size of the filter screen is not shown).

[0019] Figure 3 A schematic diagram of the internal structure of the waste cutting fluid filter cartridge provided by this utility model (the mesh and filter holes of the filter screen are not shown).

[0020] Figure 4 This utility model Figure 3 Enlarged diagram of point B in the middle.

[0021] Figure 5 A schematic diagram of the backwash pipe provided by this utility model.

[0022] The markings in the diagram are as follows: 1. Backwash pipe; 11. Collar; 12. Cavity; 13. Through hole; 14. Flushing hole; 15. Mounting plate; 151. Air inlet pipe; 2. Cylinder; 3. Filter chamber; 4. Filter screen. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model 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 only used to explain this utility model and are not intended to limit this utility model.

[0024] This embodiment provides a waste cutting fluid filter cartridge. Please refer to [link / reference]. Figures 1 to 4The filter cartridge includes a backflushing pipe 1 and a hollow cylinder 2 fitted around the backflushing pipe 1. A filter chamber 3 is provided between the backflushing pipe 1 and the cylinder 2. The side wall of the cylinder 2 has multiple filter holes, each of which connects to the filter chamber 3. During filtration, the liquid to be filtered enters the filter chamber 3 through the filter holes, while larger particles remain outside the filter cartridge, thus achieving filtration. The backflushing pipe 1 is used to backflush the cylinder 2. The lower end of the backflushing pipe 1 is sealed, and the upper end has an opening, allowing external gas to enter the backflushing pipe 1 from top to bottom. Multiple collars 11 are evenly spaced along the axial direction on the outer surface of the backflushing pipe 1, dividing the filter chamber 3 into multiple chambers 12. Multiple sets of flushing holes 14 are also provided along the axial direction of the backflushing pipe 1, with each set containing multiple flushing holes, each flushing hole 14 connecting the backflushing pipe 1 and the chamber 12. Two adjacent collars 11 are used to guide the airflow entering the backwash pipe 1 through the cavity 12 to the inner wall of the cylinder 2 and out through the filter holes, forming multiple sets of L-shaped backwash channels. In this embodiment, by setting multiple collars 11, the filter chamber 3 can be effectively divided into multiple cavities 12, so that the high-pressure gas entering the backwash pipe 1 can enter the cavity 12 through the flushing hole 14 and out through the filter holes, thereby allowing the cleaning gas to backwash the filter holes from the inner wall of the cylinder 2 outward. Through this arrangement, the cleaning gas can enter the cavity 12 through the backwash pipe 1 and the flushing hole 14 in sequence, and then exit through the filter holes, so that the airflow can form an L-shaped backwash pipe 1 when backwashing the cylinder 2, thereby effectively backwashing the impurities and stains attached to the outer surface of the cylinder 2, avoiding the problem of impurities and stains on the outer surface of the cylinder 2 clogging the cylinder 2 and causing the cylinder 2 to fail to filter normally. In this embodiment, by setting the collar 11, the airflow entering the filter chamber 3 from the backwash pipe 1 can be effectively guided, so that the airflow entering the filter chamber 3 will not flow upward along the annular filter chamber 3, but will flow along the cavity 12 formed by the two collars 11 towards the filter holes on the side wall of the cylinder 2, thereby achieving the purpose of backwashing the cylinder 2. The collar 11 is also provided with a plurality of through holes 13 for connecting two adjacent cavities 12. The through holes 13 on the collar 11 allow the filtrate in the upper cavity 12 to flow through the through holes 13 to the lower cavity 12, thereby allowing the filtrate in the filter chamber 3 to be discharged from the filter chamber 3.

[0025] The through holes 13 on two adjacent collars 11 can be staggered in the axial direction of the backwash pipe 1. The purpose of this staggered arrangement is to increase the residence time of the filtrate in different chambers 12, so that the filtrate can also precipitate in each chamber 12 when it is discharged downward through the chamber 12, thereby further improving the purity of the discharged filtrate. The through holes 13 can be located on the outermost side of the collars 11, so that the filtrate in the upper chamber 12 can flow through the through holes 13 along the edge of the collars 11 and the inner wall of the cylinder 2 to the lower chamber 12. This can effectively reduce the flow rate of the filtrate in this process, so that some fine impurities in the filtrate can also precipitate in this process, thereby further improving the purity of the filtrate discharged from the outlet. The through holes 13 can be semi-circular arc structures. The semi-circular arc structure can effectively reduce the resistance of the filtrate flowing through the through holes 13, so that the pressure can be more evenly distributed when the filtrate flows, reducing the formation of turbulence and eddies, thereby reducing flow resistance.

[0026] In this embodiment, please refer to Figure 2 Both the cylinder 2 and the backwash pipe 1 are hollow cylindrical structures, with the backwash pipe 1 coaxially installed inside the cylinder 2. The lower end of the backwash pipe 1 is sealed, allowing airflow entering the backwash pipe 1 to enter the cavity 12 along the flushing holes 14. The lower end of the cylinder 2 may have an outlet, allowing filtrate entering the cylinder 2 through the filter holes to be discharged, thus achieving filtration. The flushing holes 14 in the same group are on the same circumference of the backwash pipe 1. This arrangement allows airflow at the same location within the backwash pipe 1 to enter the cavity 12 more evenly, and then exit through the filter holes from the inner wall of the cavity 12, achieving backwashing of the filter holes. The spacing between adjacent sets of flushing holes 14 in the axial direction of the backwash pipe 1 is not the same. In this embodiment, along the axial direction of the backwash pipe 1, from the bottom of the backwash pipe 1 upwards, the gap between each pair of adjacent sets of backwashing holes 14 gradually increases. This arrangement results in a greater number of flushing holes 14 at the bottom of the backwash pipe 1 than at the top. This design ensures that the airflow entering from the top of the backwash pipe 1 still has sufficient jet air flow when it reaches the bottom of the backwash pipe 1. This allows the jet air flow to pass through the cavity 12 to backwash the filter holes, thereby enabling effective cleaning of all parts of the cylinder 2 through the backwash pipe 1.

[0027] The backwashing process of the cylinder 2 through the backwash pipe 1 is as follows: During backwashing, first stop the filtration operation of the waste cutting fluid filter cartridge and drain the filtrate in the waste cutting fluid filter cartridge. Then, the high-pressure backwashing gas is delivered from the upper end of the backwash pipe 1 into the backwash pipe 1. Under the action of high pressure, the backwashing gas enters the filter chamber 3 through the flushing hole 14, and under the action of the collar 11, the high-pressure airflow will be discharged along the cavity 12 through the filter hole. The airflow through the filter hole will flush, shake off, and peel off the impurities trapped and adhered on the outer surface of the cylinder 2 from the inside to the outside, thereby achieving the purpose of backwashing the impurities adhered to the filter hole.

[0028] Please refer to Figure 3 and Figure 5 A mounting plate 15 is fixedly installed on the top of the backwash pipe 1. An air inlet pipe 151 is provided on the mounting plate 15, connecting to the backwash pipe 1. External backwash air can be supplied to the backwash pipe 1 through the air inlet pipe 151. The upper end of the cylinder 2 is fixedly installed on the mounting plate 15, and the lower end of the cylinder 2 has a liquid outlet, which connects to the filter chamber 3. The mounting plate 15 not only allows for the assembly of the cylinder 2 and the backwash pipe 1 but also seals the upper end of the cylinder 2, allowing the filtrate entering the filter chamber 3 to be discharged along the liquid outlet of the cylinder 2 under gravity. Furthermore, in practical applications, the waste cutting fluid filter cylinder can be fixed to the location requiring filtration or assembled with other equipment via the mounting plate 15. During filtration, the liquid to be filtered enters the filter chamber 3 through the filter holes. The filter holes intercept impurities in the filtrate, trapping them on the outer surface of the cylinder 2, thus achieving the purpose of filtration.

[0029] Please refer to Figure 4 and Figure 5 The waste cutting fluid filter cartridge may also include a filter screen 4, which is attached to the outer surface of the cartridge body 2. The pore size of the filter screen 4 is smaller than that of the filter holes. The filter screen 4 can be a stainless steel wire mesh or a perforated plate of other metal materials. The pore size of the filter holes can be 2mm to 10mm, and the pore size of the filter screen 4 can be 0.1mm to 1mm. By setting the filter screen 4, impurities in the liquid to be filtered can be further trapped on the outer surface of the cartridge body 2, thereby improving the filtration efficiency of the waste cutting fluid filter cartridge. The pore size of the flushing hole 14 can be 1mm to 5mm. It can ensure that the airflow in the backflushing pipe 1 can enter the cavity 12 relatively evenly, while also maintaining a high air pressure in the airflow entering the cavity 12, thereby achieving the purpose of backflushing the filter holes.

[0030] In this embodiment, the outer surface of the filter screen 4 can also be coated with an oleophobic coating, which can be a silica coating. Applying an oleophobic coating increases the repulsive force on oil droplets, making it difficult for them to pass through the mesh of the filter screen. Simultaneously, small oil droplets that accumulate outside the filter screen 4 will coalesce into larger droplets on the outer surface of the filter screen and float to the liquid surface, thereby achieving the removal of small oil droplets from the waste cutting fluid.

[0031] In the actual design process, the outer diameter of the collar 11 is slightly smaller than the inner diameter of the cylinder 2. This is to facilitate the quick insertion of the backwash pipe 1 with the collar 11 into the cylinder 2. The diameter of the backwash pipe 1 can be 1cm to 4cm smaller than the inner diameter of the cylinder 2. The collar 11 installed on the backwash pipe 1 starts from 50mm to 100mm from the bottom of the backwash pipe 1, and then multiple collars are arranged at equal intervals of 100mm to 300mm upwards. The uppermost collar 11 can be set about 100mm below the highest liquid level filtered by the cylinder 2. The number of flushing holes 14 in each group can be 8-12. Adjacent groups of flushing holes 14 are staggered on the backwash pipe 1. The purpose of this design is to allow the airflow in the backwash pipe 1 to enter the cavity 12 more stably and evenly, so that the airflow entering the cavity 12 can be discharged through each filter hole, thereby achieving the purpose of backwashing each filter hole more evenly and improving the flushing effect of the entire backwash pipe 1. In this embodiment, the total area of ​​the flushing holes 14 can be 2-8 times the cross-sectional area of ​​the air inlet end of the backwash pipe 1. This design aims to ensure that the airflow entering the filter chamber 3 through the backwash pipe 1 is distributed more evenly within each chamber 12, thereby improving the flushing effect of the entire backwash pipe 1. In practical applications, the ratio of the total area of ​​the flushing holes 14 to the cross-sectional area of ​​the air inlet pipe 151 can be determined based on the pressure of the backwash air source. If the pressure of the backwash air source is high, such as compressed air, its volume expansion after entering the backwash pipe 1 is large, so an air inlet pipe 151 with a smaller cross-sectional area (i.e., pipe diameter) can be selected; if the backwash air is supplied by an air pump, its intake volume is large, so an air inlet pipe 151 with a larger diameter can be selected. In practical applications, a suitable air inlet pipe 151 can be selected based on the source of the backwash air, so that the airflow entering the backwash pipe 1 can be distributed more evenly on the inner surface of the cylinder 2, thereby achieving effective backwashing of the cylinder 2.

[0032] The outer surface of the cylinder 2 is coated with a hydrophilic and oleophobic nano-coating, such as polysilane nano-modified coating or AF coating. This coating can significantly increase the oil droplet contact angle by changing the surface properties of the cylinder 2, thereby intercepting the oil droplets. When the filter cartridge is in operation, the liquid to be filtered flows from the outside to the inside of the cylinder 2. At this time, the fine emulsified oil droplets in the liquid can be enriched on the outer surface of the cylinder 2 under the action of the coating. The enriched fine emulsified oil droplets will contact and merge with each other, agglomerating into larger particle size dispersed floating oil that adheres to the outer surface of the cylinder 2. Because the outer surface of the cylinder 2 is coated with an oleophobic coating, the adhesion of these large floating oil particles to the outer surface of the cylinder 2 is relatively small. When the cylinder 2 is backwashed, the floating oil and impurities adhering to the outer surface of the cylinder 2 can be easily peeled off by the airflow in the backwash pipe 1, thereby restoring the filtration efficiency of the cylinder 2.

[0033] The waste cutting fluid filter cartridge may also include a pump connected to the air inlet pipe 151. The pump is used to deliver backwash gas or liquid through the air inlet pipe 151 to the backwash pipe 1. The backwash gas or liquid in the backwash pipe 1 can backwash the filter holes through the cavity 12, thereby removing impurities adhering to the outer surface of the cartridge 2 from the outer surface of the cartridge 2, so as to achieve the purpose of backwashing the cartridge 2.

[0034] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A waste cutting fluid filter cartridge, characterized in that, It includes a backwash pipe (1) and a hollow cylindrical body (2) sleeved on the outside of the backwash pipe (1). A filter chamber (3) is provided between the backwash pipe (1) and the cylindrical body (2). The side wall of the cylindrical body (2) is provided with multiple filter holes, each of which is connected to the filter chamber (3). The lower end of the backwash pipe (1) is a sealed structure and the upper end is provided with an opening. Multiple collars (11) are installed at equal intervals along the axial direction on the outer surface of the backwash pipe (1). The collars (11) are used to divide the filter chamber (3) into multiple cavities (12). Each collar (11) is used to guide the airflow entering the backwash pipe (1) through the cavity (12) to the inner wall of the cylinder (2) and discharge it through the filter hole to form multiple sets of backwash channels with L-shaped cross-sections; the collar (11) is provided with multiple through holes (13) for connecting two adjacent cavities (12); the backwash pipe (1) is also provided with multiple sets of flushing holes (14) in the axial direction, each set of flushing holes (14) has multiple numbers, and each flushing hole (14) is connected to the backwash pipe (1) and the cavity (12) respectively.

2. The waste cutting fluid filter cartridge as described in claim 1, characterized in that, Both the cylinder (2) and the backwash pipe (1) are cylindrical structures, and the flushing holes (14) located in the same group are on the same circumference of the backwash pipe (1).

3. The waste cutting fluid filter cartridge as described in claim 1, characterized in that, The spacing between two adjacent sets of flushing holes (14) in the axial direction of the backflushing pipe (1) is different, and the spacing gradually increases from the lower end to the upper end of the backflushing pipe (1).

4. The waste cutting fluid filter cartridge as described in claim 1, characterized in that, The through holes (13) on two adjacent collars (11) are staggered in the vertical direction.

5. The waste cutting fluid filter cartridge as described in claim 1, characterized in that, The through hole (13) is located on the outermost side of the collar (11), and the through hole (13) has a semi-circular arc structure.

6. The waste cutting fluid filter cartridge as described in claim 1, characterized in that, The outer surface of the cylinder (2) is also covered with a filter screen (4), which is attached to the outer surface of the cylinder (2). The pore size of the filter screen (4) is smaller than that of the filter hole.

7. The waste cutting fluid filter cartridge as described in claim 1, characterized in that, A mounting plate (15) is fixedly installed on the top of the backwash pipe (1), and an air inlet pipe (151) is provided on the mounting plate (15), which is connected to the backwash pipe (1); the upper end of the cylinder (2) is fixedly installed on the mounting plate (15), and the lower end of the cylinder (2) is provided with a liquid outlet, which is connected to the filter chamber (3).

8. The waste cutting fluid filter cartridge as described in claim 7, characterized in that, The waste cutting fluid filter cartridge also includes a pump connected to the air inlet pipe (151), which is used to transport backflushing gas or liquid through the air inlet pipe (151) into the backflushing pipe (1).

9. The waste cutting fluid filter cartridge as described in claim 1, characterized in that, The outer surface of the cylinder (2) is uniformly coated with a hydrophilic and oleophobic nano-coating.

10. The waste cutting fluid filter cartridge as described in claim 6, characterized in that, The filter screen (4) has a pore size range of 0.1 mm to 1 mm; the filter holes have a pore size range of 2 mm to 10 mm; and the rinsing holes (14) have a pore size range of 1 mm to 5 mm.

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