Groove type purification device for metal processing cutting fluid

Abstract

The utility model discloses a groove type purification device for metal processing cutting fluid. A groove body sequentially comprises an upper groove part, a middle groove part and a lower groove part from top to bottom, wherein the walls of the upper groove part, the middle groove part and the lower groove part are mutually connected, and inner cavities of the upper groove part, the middle groove part and the lower groove part are mutually communicated; the tank body comprises a first opposite side and a second opposite side, and the settlement plates are bridged on the first opposite side and are arranged in parallel and at intervals along the second opposite side; the upper groove part is rectangular, and each upper groove wall is vertical; the middle groove part comprises four middle groove walls, namely a first middle groove wall and a second middle groove wall on the first opposite side and a third middle groove wall and a fourth middle groove wall on the second opposite side; the sectional area of the lower groove part is gradually converged from top to bottom to form a funnel shape; the third middle groove wall and the fourth middle groove wall are parallel to each other and are inclined; the distance between the first middle groove wall and the second middle groove wall is gradually reduced from top to bottom; the settlement plate comprises a vertical plate part and an inclined plate part, the vertical plate part is located in the upper groove part, and the inclined plate part is located in the middle groove part; and the inclined plate part is parallel to the third middle groove wall and the fourth middle groove wall.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of cutting fluid purification technical field, especially metalworking cutting fluid tank type purification device. BACKGROUND

[0002] Cutting fluid is an industrial liquid used for cooling and lubricating tools and workpieces during metalworking, often referred to as coolant or lubricant. The purpose of using cutting fluid is to improve processing quality, prolong tool life, improve production efficiency and reduce overall cost.

[0003] In the aluminum die-casting industry, cutting fluid is mainly used in the mechanical processing link after die-casting forming. Due to the characteristics of aluminum die-castings, such as soft material, easy sticking to the tool, and high-hardness silicon particles that can abrade the tool, as well as the possibility of internal porosity, specific requirements are placed on the selection and application of cutting fluid. Currently, semi-synthetic cutting fluid has become the most popular and widely used choice in this industry because of its good lubricity and excellent cooling properties, as well as its ease of maintenance. Synthetic cutting fluid is mainly used for high-speed, light-load processing, such as grinding.

[0004] From the perspective of environmental protection, purifying and recycling cutting fluid is an inevitable requirement for enterprises to fulfill their environmental protection responsibilities and achieve sustainable development. Directly discharging or handing over a large amount of waste cutting fluid rich in mineral oil, chemical additives, and heavy metal debris is a huge pressure on the environment and resources. Especially for large die-casting enterprises, if not used reasonably, the amount of waste cutting fluid is very large.

[0005] Cutting fluid purification and recycling equipment recycles most of the liquid, not only saving cutting costs, but also significantly reducing the amount of waste liquid that needs to be outsourced for treatment, and the huge waste liquid disposal cost is also significantly reduced.

[0006] The patent document with the authorized announcement number CN221513810U discloses a waste cutting fluid separation equipment, which includes a power device for conveying cutting fluid and a screen device for separating iron chips from cutting fluid, and also includes a box device for containing cutting fluid and precipitating waste residue. The box device is installed with a box cover device for closure at the bottom. The power device is installed on one side of the box device, and the screen device is placed on the top of the box device. The box device includes a storage box, which is provided with an inclined guide plate at the bottom. The inclined guide plate is provided with a precipitation tank, and the precipitation tank is provided with an inlet and an outlet.

[0007] The patent document with the application publication number CN120900260A discloses a waste cutting fluid separation iron chip removing device, which comprises a settling tank, an L-shaped flow slowing plate is arranged on the inner side of the settling tank, a flow liquid channel exists between one side of the L-shaped flow slowing plate and the inner side wall of the settling tank, inclined plates are fixedly arranged on the lower side of the L-shaped flow slowing plate at equal intervals, the inclined plates are all arranged to incline downward away from the one side of the flow liquid channel, an overflow notch is arranged on the side of the settling tank away from the flow liquid channel, and the overflow notch is arranged on the upper side of the inclined plate. A defoaming mechanism is arranged on the lower side of the L-shaped flow slowing plate; in the narrow space between the inclined plates, the defoaming net shakes repeatedly, and the surface tension of the foam and the oil film is quickly destroyed through segmentation and friction.

[0008] The above-mentioned settling tank type devices are all provided with inclined plates to guide the liquid flow and shorten the particle settling distance, thereby achieving the effect of solid-liquid separation. However, the devices in these patents have the problem of large interference between the upper and lower liquid layers, and the particles just precipitated on the inclined plate will be quickly brought up by the turbulent liquid, so that the purification and separation effect is poor. In particular, the patent document with the application publication number CN120900260A further arranges a shaking defoaming net on the inclined plate, which further strengthens the turbulent flow, so that the oily scum, liquid phase and particulate matter are difficult to separate efficiently. Practical new type content

[0009] The metal machining cutting fluid tank type purification device is provided to solve the problems in the prior art.

[0010] The technical scheme adopted by the metal machining cutting fluid tank type purification device to solve the above technical problems is as follows: the metal machining cutting fluid tank type purification device comprises a tank body and a plurality of settling plates arranged in the tank cavity of the tank body; the tank body comprises an upper tank portion, a middle tank portion and a lower tank portion which are sequentially arranged from top to bottom and are connected with each other and have interconnected cavities;

[0011] The tank body comprises a first pair of sides and a second pair of sides, the settling plates are arranged across the first pair of sides and are arranged in parallel and at intervals along the second pair of sides;

[0012] The upper tank portion is rectangular and each upper tank wall is vertical; the middle tank portion comprises four middle tank walls, which are a first middle tank wall and a second middle tank wall of the first pair of sides, and a third middle tank wall and a fourth middle tank wall of the second pair of sides; the lower tank portion is funnel-shaped with a gradually converging cross-sectional area from top to bottom;

[0013] The third middle tank wall and the fourth middle tank wall are parallel to each other and are both inclined; the distance between the first middle tank wall and the second middle tank wall gradually decreases from top to bottom;

[0014] The settling plate comprises a vertical plate portion and an inclined plate portion, the vertical plate portion is located in the upper tank portion, and the inclined plate portion is located in the middle tank portion; the inclined plate portion is parallel to the third middle tank wall and the fourth middle tank wall.

[0015] The utility model discloses a technical scheme that the upper edge of the vertical plate part includes high edge, low edge to present high low step structure, and the high edge is connected with the low edge through the inclined transition edge.

[0016] The utility model discloses a technical scheme that the tank body is equipped with liquid inlet, liquid outlet and oil discharge port, the liquid outlet is equipped with second middle tank wall, the liquid inlet is arranged on the upper tank wall of the high edge side, and the height is lower than the high edge, and the liquid inlet is with first middle tank wall same side, and the oil discharge port is arranged on the upper tank wall of the low edge side, and the height is higher than the low edge.

[0017] The lowest position of the oil discharge port is higher than the lowest position of the liquid inlet.

[0018] The utility model discloses a technical scheme that the tank body is equipped with liquid inlet, liquid outlet and oil discharge port, the liquid inlet and liquid outlet are arranged respectively in the first pair of sides of tank body, and the layout of liquid inlet, liquid outlet and oil discharge port is any one of layout one and layout two.

[0019] Layout one: the liquid inlet is located on the upper tank wall, the liquid outlet is located on the middle tank wall, the oil discharge port is located on the other upper tank wall opposite the liquid inlet, and the lowest position of the oil discharge port is higher than the lowest position of the liquid inlet.

[0020] Layout two: the liquid inlet is located on the middle tank wall, the liquid outlet is located on the upper tank wall, the oil discharge port is located on the other upper tank wall opposite the liquid outlet, and the lowest position of the oil discharge port is higher than the lowest position of the liquid outlet.

[0021] The utility model discloses a technical scheme that the end of the inclined plate part is close to the end of the middle tank part, and the liquid outlet is located on the end of the middle tank wall.

[0022] The utility model discloses a technical scheme that the oil discharge port is equipped with the first adjusting plate of up and down lifting to adjust the lowest position height of the oil discharge port.

[0023] The utility model discloses a technical scheme that the liquid inlet or liquid outlet is equipped with the second adjusting plate of up and down lifting to adjust the lowest position height of the liquid inlet or liquid outlet.

[0024] The utility model discloses a technical scheme that the end of the lower tank part is equipped with the chip removal passage and passage opening and closing device.

[0025] The utility model discloses a technical scheme that solves the above technical problem is as follows: including two mutually series' groove body: first groove body and second groove body, each groove body is provided with the sedimentation plate, be equipped with the oil discharge groove body between first groove body and second groove body,

[0026] The liquid inlet of the first groove body is a first liquid inlet, the oil discharge port of the first groove body is a first oil discharge port, and the liquid outlet of the first groove body is a first liquid outlet.

[0027] The liquid inlet of the second groove body is a second liquid inlet, the oil discharge port of the second groove body is a second oil discharge port, and the liquid outlet of the second groove body is a second liquid outlet.

[0028] The first oil discharge port and the second oil discharge port are located on the upper groove wall of the inner side of the first groove body and the second groove body, respectively.

[0029] The first liquid inlet and the second liquid outlet are located on the upper groove wall of the outer side of the first groove body and the second groove body, respectively.

[0030] The first liquid outlet and the second liquid inlet are located on the middle groove wall of the inner side of the first groove body and the second groove body, respectively.

[0031] The utility model discloses a technical scheme that solves the above technical problem is as follows: the lower groove of first groove body and the lower groove of second groove body are in parallel and close and the end converges and communicates the same chip removal channel.

[0032] Compared with the prior art, the utility model has the advantages that the partition of the groove body separates the functional parts, and the oil is applied and the particles are lowered to avoid mutual interference. The setting of the vertical plate part guides the stable flow of the treated chip liquid in the vertical direction, plays a role of flow guiding and flow stabilizing, is also beneficial to the settlement of particles and the floating of bubbles and the adhesion of oil, and simultaneously separates the upper floating dregs and the sinking metal particles in space, further avoids the mixing and interference of the two. BRIEF DESCRIPTION OF DRAWINGS

[0033] The utility model will be further described in detail in combination with the drawings and preferred embodiments, but the person skilled in the art will appreciate that these drawings are only drawn for the purpose of explaining the preferred embodiments, and therefore should not be regarded as a limitation on the scope of the utility model. In addition, unless specifically indicated, the drawings only schematically show the composition or structure of the described object and can include exaggerated display, and the drawings are not necessarily drawn to scale.

[0034] Figure 1 It is the three-dimensional schematic view of the single-groove metal processing cutting fluid groove type purification device.

[0035] Figure 2 A sectional view of a metalworking cutting fluid tank type purification device of a single tank type;

[0036] Figure 3 A perspective view of a metalworking cutting fluid tank type purification device of a double tank type;

[0037] Figure 4 A sectional view of a metalworking cutting fluid tank type purification device of a double tank type Figure 1 ;

[0038] Figure 5 A sectional view of a metalworking cutting fluid tank type purification device of a double tank type Figure 2 .

[0039] Reference signs:

[0040] Tank body 10; sedimentation plate 20; upper tank portion 11; middle tank portion 12; lower tank portion 13; first middle tank wall 1; second middle tank wall 2; third middle tank wall 3; fourth middle tank wall 4; vertical plate portion 21; inclined plate portion 22; liquid inlet 5; liquid outlet 6; oil discharge port 7. First tank body 10a; second tank body 10b; first sedimentation plate 20a; second sedimentation plate 20b; first vertical plate portion 21a; first inclined plate portion 22a; second vertical plate portion 21b; first lower tank portion 13a; second lower tank portion 13b; second inclined plate portion 22b; first oil discharge port 7a; first liquid outlet 6a; second liquid outlet 6b; second oil discharge port 7b; oil discharge tank body 30; high edge 211; low edge 212; transition edge 213; chip removal passage 9; first adjusting plate 40; second adjusting plate 80; passage opening and closing device 90. DETAILED DESCRIPTION

[0041] Preferred embodiments of the present application will be described in detail below with reference to the attached drawings. It will be appreciated that the description is merely descriptive, exemplary, and should not be interpreted as limiting the scope of protection of the present application.

[0042] It should be noted that similar reference numerals refer to similar items in the following drawings, and therefore, once an item is defined in one drawing, it will not be further defined and explained in subsequent drawings.

[0043] In the description of the present application, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the die casting of the present application is usually placed during use, and are merely for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0044] As Figures 1-2 shown, the present embodiment provides a metalworking cutting fluid tank type purification device, which comprises a tank body 10 and a plurality of settling plates 20 arranged in the tank cavity of the tank body 10. The tank body 10 comprises a first pair of sides and a second pair of sides. The tank body 10 comprises, from top to bottom, an upper tank portion 11, a middle tank portion 12 and a lower tank portion 13, which are connected to each other and the inner cavities of which are interconnected.

[0045] As Figures 1-2 shown, the upper tank portion 11 is rectangular and each upper tank wall is vertical. The middle tank portion 12 comprises four middle tank walls, namely a first middle tank wall 1 and a second middle tank wall 2 of the first pair of sides, and a third middle tank wall 3 and a fourth middle tank wall 4 of the second pair of sides. The lower tank portion 13 gradually converges in cross-sectional area from top to bottom to form a funnel shape. The third middle tank wall 3 and the fourth middle tank wall 4 are parallel to each other and are both inclined. The distance between the first middle tank wall 1 and the second middle tank wall 2 gradually decreases from top to bottom.

[0046] In the present embodiment, the settling plates 20 span the first pair of sides and are arranged in parallel and spaced apart along the second pair of sides. The settling plates 20 comprise a vertical plate portion 21 and an inclined plate portion 22, the vertical plate portion 21 being located in the upper tank portion 11 and the inclined plate portion 22 being located in the middle tank portion 12. The inclined plate portion 22 is parallel to the third middle tank wall 3 and the fourth middle tank wall 4.

[0047] As Figures 1-2 shown, the tank body 10 is provided with a liquid inlet 5, a liquid outlet 6 and an oil outlet 7. The cutting fluid to be treated enters the tank body 10 from the liquid inlet 5, passes through the channels between the spaced-apart settling plates 20, and realizes settling separation: the floating of gas bubbles and the adhesion of oil to form dregs, which are discharged from the oil outlet 7 to an oil discharge tank body 30. The metal particles settle on the inclined plate portion 22 and enter the lower tank portion 13 along the inclined plate portion 22. The arrangement of the vertical plate portion 21 guides the stable flow of the cutting fluid to be treated in the vertical direction, plays a role in flow guiding and flow stabilizing, is also conducive to the settling of particles and the floating and adhesion of gas bubbles and oil, and at the same time spatially separates the upper dregs and the sinking metal particles to avoid their mixing and interference.

[0048] As Figures 1-2 shown, the liquid inlet 5 and the liquid outlet 6 are arranged on the first pair of sides of the tank body 10. According to the different positions of the liquid inlet 5, the layout of the liquid inlet 5, the liquid outlet 6 and the oil outlet 7 can be any one of layout one and layout two.

[0049] In layout one, as Figures 1-2 shown, the liquid inlet 5 is located on the upper tank wall, the liquid outlet 6 is located on the middle tank wall, and the oil outlet 7 is located on the other upper tank wall opposite to the liquid inlet 5, and the lowest position of the oil outlet 7 is higher than the lowest position of the liquid inlet 5.

[0050] In layout 2, the liquid inlet 5 is located on the middle tank wall, the liquid outlet 6 is located on the upper tank wall, and the oil drain 7 is located on the other upper tank wall opposite to the liquid outlet 6. The lowest point of the oil drain 7 is higher than the lowest point of the liquid outlet 6.

[0051] like Figures 3-5 As shown, in a preferred embodiment, the device includes two interconnected tank bodies: a first tank body 10a and a second tank body 10b. Each tank body is provided with a settling plate 20. The settling plate 20 of the first tank body 10a is the first settling plate 20a, and the settling plate 20 of the second tank body 10b is the second settling plate 20b. The first settling plate 20a includes a first vertical plate portion 21a and a first inclined plate portion 22a. The second settling plate 20b includes a second vertical plate portion 21b and a second inclined plate portion 22b. An oil drain tank 30 is provided between the first tank body 10a and the second tank body 10b.

[0052] The first tank body 10a and the second tank body 10b are respectively arranged in layout one and layout two. Specifically, the liquid inlet of the first tank body 10a is the first liquid inlet, the oil outlet of the first tank body 10a is the first oil outlet 7a, and the liquid outlet of the first tank body 10a is the first liquid outlet 6a. The liquid inlet of the second tank body 10b is the second liquid inlet, the oil outlet of the second tank body 10b is the second oil outlet 7b, and the liquid outlet of the second tank body 10b is the second liquid outlet 6b. The first oil outlet 7a and the second oil outlet 7b are respectively located on the upper tank wall of the inner side of the first tank body 10a and the second tank body 10b adjacent to each other. The first oil outlet 7a and the second oil outlet 7b lead to the oil drain tank 30. The first liquid inlet and the second liquid outlet 6b are respectively located on the upper tank wall of the outer side of the first tank body 10a and the second tank body 10b far apart from each other. The first outlet 6a and the second inlet are located on the inner walls of the first tank body 10a and the second tank body 10b, respectively, adjacent to each other.

[0053] In this series of devices, the molten cutting fluid containing air bubbles enters the first tank body 10a through the first inlet. Oily waste, dust, and fine particulate contaminants are adhered to by the air bubbles, float to the surface, and form scum, which then overflows into the drain tank 30 through the first outlet 7a. Heavier particles not adhered to by the air bubbles deposit on the surface of the first inclined plate 22a as the liquid flows downwards, accumulating to a certain thickness before sliding to the bottom. Oil and gas aggregates adhered to by nanobubbles, due to their slow upward movement, rise and accumulate on the back side of the first inclined plate 22a as the liquid flows downwards. They move upwards along the back side of the first inclined plate 22a, aggregate after passing through the first vertical plate 21a, and finally float to the surface. The liquid phase enters the area of ​​the second inclined plate 22b of the second tank body 10b from the lower side of the other end of the first inclined plate 22a through the first outlet 6a and the second inlet on the intermediate partition.

[0054] Then, the liquid flows upward, and the powder and suspended matter that are not adhered to by the bubbles further settle on the surface of the second inclined plate 22b of the second tank body 10b. The cutting fluid flows upward into the second vertical plate 21b, and the scum carried by other bubbles rises to the surface of the liquid to form a floating oil layer, which overflows into the oil drain tank through the second oil drain port 7b. The liquid phase of the second tank body 10b that has been purified flows out through the upper second liquid outlet 6b.

[0055] Preferably, such as Figure 1 As shown, in a preferred embodiment, the upper edge of the vertical plate 21 includes a high edge 211 and a low edge 212 in a stepped structure, with the high edge 211 and the low edge 212 connected by an inclined transition edge 213. The liquid outlet 6 is located on the second intermediate tank wall 2. The liquid inlet 5 is located on the upper tank wall adjacent to the high edge, and its height is lower than the high edge; the liquid inlet 5 is on the same side as the first intermediate tank wall 1. The oil outlet 7 is located on the upper tank wall adjacent to the low edge, and its height is higher than the low edge; the lowest point of the oil outlet 7 is higher than the lowest point of the liquid inlet 5. This structure allows scum to be pushed towards the oil outlet 7 by utilizing the structural features of the upper edge of the settling plate 20, which not only facilitates scum removal but also avoids mutual interference between the scum and the lower liquid phase, resulting in higher separation efficiency.

[0056] like Figure 2 , 5 As shown, in a preferred embodiment, the end of the inclined plate portion 22 is close to the end of the middle tank portion 12. The outlet 6 is located at the end of the middle tank wall. This allows the particles settled on the inclined plate portion 22 to be directly introduced into the lower tank portion 13. For the high-inlet, low-outlet structure of layout one, the liquid undergoing deep separation by the inclined plate portion 22 flows out from this position, further ensuring the degree of sedimentation separation. For the bottom-inlet, high-outlet structure of layout two, the liquid flows in from here, which can more effectively utilize the settling plate 20 and ensure the settling effect.

[0057] like Figure 3 As shown, in a preferred embodiment, a first adjusting plate 40 that can be raised and lowered is provided at the oil drain port 7 to adjust the lowest position height of the oil drain port 7. Since the oil scum will automatically overflow when the height exceeds the lowest position of the oil drain port 7, the first adjusting plate 40 can control the overflow threshold. When the oil layer is thick, the adjusting plate is raised to increase the oil layer storage space; when the oil layer is thin, the adjusting plate is lowered to promote oil drainage. That is to say, by adjusting the height of the first adjusting plate 40, the lowest position of the oil drain port 7 can be controlled, thereby adapting to different oil scum loads and preventing excessive liquid phase overflow or oil scum backflow.

[0058] like Figure 3As shown, in a preferred embodiment, the second adjusting plate 80 is arranged at the liquid outlet 6 and can be lifted up and down to adjust the lowest position of the liquid outlet 6. Of course, the second adjusting plate 80 can also be arranged at the liquid inlet 5 to adjust the lowest position of the liquid inlet 5. By adjusting the height of the liquid outlet 6 or the liquid inlet 5, the height difference between the liquid outlet 6 or the liquid inlet 5 and the oil outlet 7 can be adjusted, and the oil and scum overflow threshold can be indirectly controlled.

[0059] As shown, Figure 1 , 3 As shown, the end of the lower groove part 13 is provided with a chip discharge channel 9 and a channel opening and closing device 90, so that the outward recovery of metal chips can be artificially controlled. In the scheme of two groove bodies 10 in series, the first lower groove part 13a of the first groove body 10a and the second lower groove part 13b of the second groove body 10b are arranged in close proximity and the ends converge to communicate with the same chip discharge channel 9.

[0060] The metal machining cutting fluid groove type purification device provided by the utility model is introduced by using specific examples in the present application. The above embodiment is only used to help understand the utility model and the core idea. It should be pointed out that for ordinary skilled persons in the art, without departing from the principle of the utility model, the utility model can be improved and modified in many ways. These improvements and modifications also fall within the protection scope of the utility model claims.

Claims

1. A metalworking cutting fluid tank purification device, characterized in that: it comprises a tank body and a plurality of settling plates arranged in the tank cavity of the tank body; the tank body comprises an upper tank portion, a middle tank portion and a lower tank portion which are connected with each other and the cavities of which are communicated with each other from top to bottom; the tank body comprises a first pair of sides and a second pair of sides, the settling plates span the first pair of sides and are arranged in parallel and spaced apart along the second pair of sides; the upper tank portion is rectangular and each upper tank wall is vertical; the middle tank portion comprises four middle tank walls, which are a first middle tank wall and a second middle tank wall of the first pair of sides, and a third middle tank wall and a fourth middle tank wall of the second pair of sides; the lower tank portion converges gradually in cross-sectional area from top to bottom to form a funnel shape; the third middle tank wall and the fourth middle tank wall are parallel to each other and are both inclined; the distance between the first middle tank wall and the second middle tank wall gradually decreases from top to bottom; the settling plate comprises a vertical plate portion and an inclined plate portion, the vertical plate portion is located in the upper tank portion, and the inclined plate portion is located in the middle tank portion; the inclined plate portion is parallel to the third middle tank wall and the fourth middle tank wall, respectively.

2. The metalworking cutting fluid tank purification device according to claim 1, characterized in that: the upper edge of the vertical plate portion comprises a high edge and a low edge to form a high-low step structure, and the high edge and the low edge are connected by an inclined transition edge.

3. The metalworking cutting fluid tank purification device according to claim 2, characterized in that: the tank body is provided with a liquid inlet, a liquid outlet and an oil outlet; the liquid outlet is arranged on the second middle tank wall; the liquid inlet is arranged on the upper tank wall adjacent to one side of the high edge and has a height lower than the high edge, and the liquid inlet is on the same side as the first middle tank wall; the oil outlet is arranged on the upper tank wall adjacent to one side of the low edge and has a height higher than the low edge; the lowest position of the oil outlet is higher than the lowest position of the liquid inlet.

4. The metalworking cutting fluid tank purification device according to claim 1, characterized in that: the tank body is provided with a liquid inlet, a liquid outlet and an oil outlet; the liquid inlet and the liquid outlet are arranged on the first pair of sides of the tank body, respectively; the layout of the liquid inlet, the liquid outlet and the oil outlet is any one of layout one and layout two; layout one: the liquid inlet is located on the upper tank wall, the liquid outlet is located on the middle tank wall, and the oil outlet is located on the other upper tank wall opposite to the liquid inlet, and the lowest position of the oil outlet is higher than the lowest position of the liquid inlet; layout two: the liquid inlet is located on the middle tank wall, the liquid outlet is located on the upper tank wall, and the oil outlet is located on the other upper tank wall opposite to the liquid outlet, and the lowest position of the oil outlet is higher than the lowest position of the liquid outlet.

5. The metalworking cutting fluid tank purification device according to claim 4, characterized in that: the end of the inclined plate portion is close to the end of the middle tank portion; the liquid outlet is located at the end of the middle tank wall.

6. The metalworking cutting fluid tank purification device according to claim 3, characterized in that: a first adjusting plate which can be raised and lowered is arranged at the oil outlet to adjust the height of the lowest position of the oil outlet.

7. The metalworking cutting fluid tank purification device according to claim 4, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The second adjusting plate is arranged at the liquid inlet or liquid outlet and can be lifted up and down to adjust the lowest position of the liquid inlet or liquid outlet.

8. The metalworking cutting fluid tank purifier according to claim 1, characterized in that: The lower tank portion is provided with a chip removal channel and a channel opening and closing device.

9. The metalworking cutting fluid tank purifier according to claim 1, characterized in that: The two tank bodies are connected in series, and each tank body is provided with the settling plate; and an oil removal tank body is arranged between the first tank body and the second tank body. The liquid inlet of the first tank body is a first liquid inlet, the oil outlet of the first tank body is a first oil outlet, and the liquid outlet of the first tank body is a first liquid outlet. The liquid inlet of the second tank body is a second liquid inlet, the oil outlet of the second tank body is a second oil outlet, and the liquid outlet of the second tank body is a second liquid outlet. The first oil outlet and the second oil outlet are respectively arranged on the upper tank wall of the inner side of the first tank body and the second tank body adjacent to each other; and the first oil outlet and the second oil outlet lead to the oil removal tank body. The first liquid inlet and the second liquid outlet are respectively arranged on the upper tank wall of the outer side of the first tank body and the second tank body away from each other. The first liquid outlet and the second liquid inlet are respectively arranged on the middle tank wall of the inner side of the first tank body and the second tank body adjacent to each other.

10. The metalworking cutting fluid tank purifier according to claim 9, characterized in that: The lower tank portion of the first tank body and the lower tank portion of the second tank body are arranged in parallel and close to each other, and the ends thereof converge and communicate with the same chip removal channel.

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