An automatic machine tool lubricating oil circulation filtering device

Abstract

The application discloses an automatic machine tool lubricating oil circulating filtering device, and relates to the technical field of waste lubricating oil recycling, which comprises an inner wall on opposite sides of a feeding hopper, wherein inclined distribution of support grid plates is arranged; a plurality of equidistantly distributed grid slots on the support grid plates are further arranged; and longitudinal plates are distributed in the grid slots; in a default state, the longitudinal plates are lower than upper surfaces of the support grid plates; and in a driven state, the longitudinal plates extend out of the grid slots to adjust and separate the filtering paper from surfaces of the support grid plates. In the application, the filtering paper is pushed away from the surfaces of the support grid plates by the longitudinal plates, so that the liquid bridge effect between the support grid plates and the filtering paper disappears during replacement of the filtering paper.

Description

Technical Field

[0001] This invention relates to the field of waste lubricating oil recycling and reuse technology, specifically to an automated machine tool lubricating oil circulation and filtration device. Background Technology

[0002] Lubricating oil plays a crucial role in machine tool operation, serving not only lubrication but also cooling. As the oil circulates continuously within the machine tool's internal oil passages, it accumulates impurities, leading to decreased oil cleanliness and, in severe cases, blockages. Therefore, a common approach is to recycle waste lubricating oil: a pump draws the waste oil into a filter box located on one side of the machine tool, with a filtration mechanism installed at the outlet. To ensure effective filtration, filter paper is typically used as the filter medium. Specifically, the waste lubricating oil outlet is located at the top of the filter box, and a filter paper roll placement station is set up on one side of the top of the tank, allowing the filter paper to span the top port. The waste oil is then directly discharged onto the filter paper for filtration. After a certain period, the used filter paper is manually pulled out and placed into a storage box on the other side of the top of the tank, thus maintaining stable filtration.

[0003] For example, a Chinese authorized patent (publication number CN213574947U, publication date June 29, 2021) discloses an oil tank mechanism for automatically collecting filter paper, including a filter box. The filter box has a rotatable front shaft and a rear shaft. A roll of filter paper is mounted on the front shaft, and the end of the filter paper is connected to the rear shaft. The rear shaft is driven to rotate by a motor. The filter box also has an oil inlet pipe, a liquid level switch, and a stop bar to press down the filter paper. The advantages of this utility model are its simple structure and convenient installation. By driving the shaft with a motor, the dirty filter paper is rolled into the rear shaft, while the clean filter paper on the front shaft is automatically laid into the filter box, reducing the work of workers frequently cleaning the filter paper.

[0004] In the aforementioned prior art, an automatic winding method using a motor drives the waste filter paper, achieving automatic filter paper replacement. However, when the filter paper crosses the top port of the filter box, a plate is usually installed on the inner wall of the port to support the filter paper and prevent it from falling due to gravity. When the filter paper is wetted and comes into close contact with the flat plate below (usually metal or plastic), a "liquid bridge" effect is formed between the two liquid layers. The surface tension of the liquid generates an adsorption force perpendicular to the contact surface; at the same time, the viscous liquid generates shear resistance during relative motion. Therefore, compared to manual pulling, mechanical pulling may result in the filter paper tearing due to excessive pulling force. Summary of the Invention

[0005] The purpose of this invention is to provide an automated machine tool lubricating oil circulation and filtration device to overcome the above-mentioned shortcomings in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an automated machine tool lubricating oil circulation filtration device, comprising a filter box, a feed hopper fixedly installed on its top, and a roll material placement station and a waste material collection trough symmetrically distributed about the center of the feed hopper. The filter paper on the roll material placement station covers the feed hopper and is located in the waste material collection trough. Inclined supporting grid plates are provided on the inner walls of opposite sides of the feed hopper. The device also includes longitudinal plates distributed in several equidistant grid grooves on the supporting grid plates. In the default state, the longitudinal plates are lower than the upper surface of the supporting grid plates. In the driven state, the longitudinal plates extend out of the grid grooves to displace the filter paper from the surface of the supporting grid plates.

[0007] Preferably, it also includes an oil inlet pipe with one end fixedly connected to a feed barrel, the feed barrel being centrally located within the feed hopper and passing through the filter paper under negative pressure;

[0008] The distance between the feed hopper and the lower part of the supporting grating plate is greater than the height of the extended longitudinal plate.

[0009] Preferably, in the default state, the longitudinal plate is attached to the inner wall of one side of the grid groove.

[0010] Preferably, the longitudinal plate in the driven state moves along an arc-shaped path in the vertical horizontal plane and then adheres to the side wall on the side opposite to the default state.

[0011] Preferably, the longitudinal plate maintains its longitudinal horizontal plane along the grid groove during its movement along the arc-shaped route.

[0012] Preferably, the system also includes a rotatable lever, and the ends of the plurality of longitudinal plates are connected to a connecting portion;

[0013] One end of the lever is rotatably connected to the connecting part, while the other end is in a sliding groove fit with the movable plate slidably installed at the bottom of the feed hopper.

[0014] Preferably, symmetrically distributed guide columns are fixedly installed inside the filter box, and a curved guide surface that slides with the guide columns is fixedly installed on the joint.

[0015] Preferably, the guide curved surface includes a concave surface and recessed alignment grooves disposed at both ends of the concave surface. In the default state, the guide post is located in any of the recessed alignment grooves.

[0016] Preferably, a rounded rectangular plate that is driven to maintain circumferential rotation is rotatably arranged inside the waste material collection trough, and guide rods with their ends maintaining a predetermined distance from one end of the waste material collection trough to form a paper removal trough are symmetrically welded on the rounded rectangular plate.

[0017] Preferably, it also includes a U-shaped slot that is driven to move vertically, which is used to engage with the end of one side wall of the feed hopper to compress the filter paper.

[0018] In the above technical solution, the automated machine tool lubricating oil circulation filtration device provided by the present invention has the following beneficial effects: by relying on the equidistantly distributed grid grooves on the grid plate, the contact area between the plate surface and the filter paper is reduced. During the paper changing operation, the longitudinal plate is driven to move, thereby lifting the port of the grid groove upward and causing the filter paper to detach from the surface of the grid plate, thus avoiding the generation of liquid bridge effect and ensuring the smooth implementation of automated winding of waste filter paper. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention;

[0021] Figure 2 This is an exploded structural diagram of the U-shaped slot and cylinder provided in an embodiment of the present invention;

[0022] Figure 3 An exploded structural diagram of the rounded rectangular plate, guide rod, and first stepper motor provided in an embodiment of the present invention;

[0023] Figure 4 A schematic diagram of the structure of the grid plate, longitudinal plate and driving mechanism provided in an embodiment of the present invention;

[0024] Figure 5 A schematic diagram of the joint, lever, and movable plate provided in an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the movement trajectory structure of the longitudinal plate located in the grid groove according to an embodiment of the present invention;

[0026] Figure 7 This is an exploded structural diagram of a structure relying on a grating plate and longitudinal plates, provided in an embodiment of the present invention.

[0027] Figure 8 This is a schematic diagram of the structure within the longitudinal plate and the grid groove provided in an embodiment of the present invention;

[0028] Figure 9 This is a schematic diagram of the structure of the guide post and guide curved surface provided in an embodiment of the present invention;

[0029] Figure 10 This is a structural schematic diagram of the cross-section of the feed hopper provided in an embodiment of the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Filter box; 11. Feed hopper; 12. Roll material placement station; 13. Waste material collection trough; 2. Oil inlet pipe; 21. Feed bucket; 3. Supporting grating plate; 31. Grating groove; 4. Longitudinal plate; 40. Joint; 60. Lever; 61. Moving plate; 62. Guide column; 63. Guide curved surface; 631. Concave surface; 632. Recessed alignment groove; 70. Rounded rectangular plate; 71. Paper removal groove; 72. Guide rod; 72. First stepper motor; 8. Tension spring; 80. U-shaped card slot; 81. Cylinder. Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0033] Please see Figure 1-10 This invention provides a technical solution: an automated machine tool lubricating oil circulation filtration device, including a filter box 1, on which a feed hopper 11 is fixedly installed, and a roll material placement station 12 and a waste material collection trough 13 are symmetrically distributed about the center of the feed hopper 11. The filter paper on the roll material placement station 12 covers the feed hopper 11 and is located in the waste material collection trough 13. The inner walls on opposite sides of the feed hopper 11 are provided with inclined supporting grid plates 3, and the device also includes longitudinal plates 4 distributed in a plurality of equidistant grid grooves 31 on the supporting grid plates 3. In the default state, the longitudinal plates 4 are lower than the upper surface of the supporting grid plates 3. In the driven state, the longitudinal plates 4 extend out of the grid grooves 31 to adjust the filter paper to detach from the surface of the supporting grid plates 3.

[0034] Specifically, the filter box 1 in the embodiment is also equipped with a refrigeration system, such as a heat exhaust fan or water-cooled pipe, the purpose of which is to cool down the filtered lubricating oil stored in the filter box 1.

[0035] The bottom of the filter box 1 is fixedly connected to an oil drain pipe, which is used to return the filtered lubricating oil back to the machine tool's lubricating oil circuit.

[0036] Furthermore, in the above embodiment, the feed hopper 11 has notches on its two side walls, and the filter paper passes through the notches and is arranged inside the feed hopper 11.

[0037] Secondly, in this embodiment, the two relatively distributed supporting grid plates 3 are positioned at the center of the feed hopper 11, with a predetermined distance between them. The sucked-in waste lubricating oil is directly discharged onto the filter paper, corresponding to the center of the feed hopper 11. At this time, the waste lubricating oil will soak into the filter paper, causing it to sink under its own weight at the discharge contact point, and be supported by the supporting grid plates 3. The supporting grid plates 3 and the filter paper form a liquid bridge effect due to the immersion of the filtered lubricating oil, thus firmly holding the filter paper and preventing it from continuing to sink under its own weight.

[0038] The purpose of the above design is to make the filter paper laid on the grid plate 3 V-shaped, thereby forming a filter hopper for storing oil, so as to prevent the waste lubricating oil from flowing directly into the filter box 1 without being filtered due to lack of restraint from the gap between the filter paper and the grid plate 3.

[0039] Furthermore, in the above embodiment, the top corner of the longitudinal plate 4 is a rounded corner structure. One longitudinal plate 4 is distributed within each grid groove 31 on the supporting grid plate 3, or within a series of grid grooves 31 arranged at intervals, or between every two grid grooves 31. By driving the longitudinal plate 4 to move out of the grid groove 31, the filter paper is lifted off the surface of the supporting grid plate 3, thereby avoiding the liquid bridge effect and ensuring the smooth implementation of automated waste filter paper winding. The longitudinal plate 4 can be driven upwards by a cylinder push or by a linkage assembly, or any driving method known to those skilled in the art.

[0040] Furthermore, in the embodiments (such as) Figure 3 As shown, a rounded rectangular plate 70, driven to maintain circumferential rotation, is rotatably installed inside the waste material collection tank 13. Guide rods 72 are symmetrically welded to the rounded rectangular plate 70, with their ends maintaining a predetermined distance from one end of the waste material collection tank 13 to form a paper removal slot 71. The rounded rectangular plate 70 is driven to maintain uniform rotation by a first-step motor 73 fixedly installed on the outer sidewall of the waste material collection tank 13, causing the two guide rods 72 to rotate and roll up the waste filter paper. After the entire filter paper roll has been used, it can be easily pulled out by grasping the waste filter paper roll from the paper removal slot 71.

[0041] The inner wall of the feed hopper 11 can be equipped with sensors, such as float switches, level sensors, and other conventional and well-known detection electronic components. When the level of waste lubricating oil in the filter hopper rises to a predetermined height, the longitudinal plate 4 and the first stepper motor 73 are driven to run simultaneously to wind up the waste filter paper. The aforementioned electronic components and control programs are all prior art known to those skilled in the art, and therefore will not be described in detail.

[0042] Furthermore, the aforementioned roll placement station 12 includes a rotating shaft mounting plate symmetrically welded to the side wall of the feed hopper 11, and a rotating shaft passing through the filter paper roll is engaged in the groove of the rotating shaft mounting plate.

[0043] As a further embodiment of the present invention, combined with Figure 1 and Figure 2 As shown, it also includes an oil inlet pipe 2 with one end fixedly connected to the feed barrel 21. The feed barrel 21 is centrally located inside the feed hopper 11 and the filter paper passes through under negative pressure.

[0044] The distance between the feed hopper 11 and the lower part of the supporting grating plate 3 is greater than the height of the extended longitudinal plate 4.

[0045] Specifically, the aforementioned feed hopper 21 is a long rectangle, with its long side longer than the distance between the two adjacent sides of the supporting grid plates 3. This is to concentrate the waste lubricating oil entering the filter hopper along the port of feed hopper 21 and then flowing out through the gap between them. This ensures that the filtered waste residue of the waste lubricating oil is located in the center of the filter paper, spreading outwards from the center of the filter paper as it is used. This not only guarantees the filtration effect of the filter paper in the usage section, thus maximizing the service life of that section of filter paper, but also ensures that the waste residue is located on the filter paper, preventing it from falling off the filter paper and entering the feed hopper 11 during the winding process.

[0046] Secondly, the distance between the feed hopper 21 and the supporting grid plate 3 in the embodiment should be such that it does not affect the extension of the longitudinal plate 4 to lift the filter paper. That is, it should be 2-4cm higher than the highest point of the longitudinal plate 4's movement trajectory, or even longer. The distance should be adjusted according to the actual situation.

[0047] As another embodiment further provided by the present invention, in the default state, the longitudinal plate 4 is attached to the inner wall of one side of the grid groove 31 (e.g. Figures 6-8 ).

[0048] Specifically, in the above embodiment, the longitudinal plate 4, in its default state (i.e., when it is lower than the upper surface of the supporting grid plate 3), is attached to the inner wall of one side of the grid groove 31. The attachment of the longitudinal plate 4 to the inner wall of the grid groove 31 creates a liquid bridge effect between them. This liquid bridge connects with the liquid bridge formed when the upper surface of the supporting grid plate 3 contacts the filter paper, acting as a guide to accelerate the formation of the lubricating oil film between the upper surface of the supporting grid plate 3 and the filter paper. Furthermore, during upward lifting, the two connected liquid bridges transmit the lifting force to the filter paper, effectively applying a separating pull between the filter paper and the supporting grid plate, thus facilitating easy separation.

[0049] As another embodiment of the present invention, the longitudinal plate 4 in the driven state moves along an arc-shaped path on the vertical horizontal plane and then attaches to the side wall on the side that is in the default state.

[0050] As another embodiment of the present invention, the longitudinal plate 4 maintains its longitudinal horizontal plane along the grid groove 31 during the movement of the arc-shaped route.

[0051] Specifically, in the above embodiment, the longitudinal plate 4 moves along the direction of the grid groove 31 relative to the two side walls during the driven movement, that is, it moves from one side wall of the grid groove 31 to the other side wall, and moves along an arc-shaped route during the process, so it produces a sweeping effect.

[0052] Furthermore, such as Figure 4 and Figure 5 The driving mechanism that drives the longitudinal plate 4 to perform the "sliding" action in the above embodiment also includes a rotatable lever 60, and the ends of the multiple longitudinal plates 4 are connected to the joint 40.

[0053] One end of the lever 60 is rotatably connected to the connecting part 40, while the other end is in a sliding groove fit with the movable plate 61 that is slidably installed at the bottom of the feed hopper 11.

[0054] The central part of the aforementioned lever 60 is a pivot, so the lever 60 is mounted on the filter box 1 via the pivot, thus achieving a rotational engagement. The assembly of the lever 60 and the moving plate 61 is as follows: a vertical groove is formed on the lever 60, and the convex shaft on the moving plate 61 is located inside this groove. The moving plate 61 is slidably mounted in a slide rail installed on the inner wall of the filter box 1, and the bottom side of the moving plate 61 may have teeth or a rough surface. It engages with a circular gear or guide roller rotatably mounted on the filter box 1, thereby driving the moving plate 61 to move. Both circular gears or guide rollers are fixedly mounted on the same shaft, which is fixedly connected to the output end of a second stepper motor fixedly mounted on the outer wall of the filter box 1. This causes the circular gears or guide rollers to roll, driving the moving plate 61 to move left or right. Furthermore, the lever 60 swings, causing the longitudinal plate 4 to perform a "sliding" action, thus eliminating the liquid bridge effect.

[0055] As another embodiment of the present invention, the longitudinal plate 4 maintains its longitudinal horizontal plane along the grid groove 31 during its movement along the arc-shaped route.

[0056] Specifically, the "sliding" action in the above embodiment pertains to a vertical path. In this embodiment, however, a horizontal "sliding" action is added simultaneously with the aforementioned "sliding" action. In short, when the longitudinal plate 4 moves vertically along an arc-shaped path to a high position, the corresponding longitudinal plate 4 also moves along the longitudinal direction of the grid groove 31 along an arc-shaped path, also reaching a high position. Through the combined movement of the longitudinal and vertical arc-shaped paths, a composite "sliding" action is achieved, ensuring the separation of the filter paper from the supporting grid plate 3, thereby eliminating the liquid bridge effect.

[0057] Furthermore, such as Figure 9 As shown, symmetrically distributed guide columns 62 are fixedly installed inside the filter box 1. The cross-section of the guide columns 62 is circular. The joint 40 is fixedly installed with a curved guide surface 63 that slides with the guide columns 62. The guide surface 63 includes a concave surface 631 and recessed alignment grooves 632 at both ends of the concave surface 631. In the default state, the guide column 62 is located in any of the recessed alignment grooves 632. In the default state, the longitudinal plate 4 is attached to the inner wall of one side of the grid groove 31, and the guide column 62 is stopped in the recessed alignment groove 632 corresponding to the inner wall of that side.

[0058] When the second stepper motor operates, it causes the circular gear or guide roller to roll, thereby driving the moving plate 61 to move left or right. During the movement, the moving plate 61 rotates the lever 60, causing the connecting part 40 to move horizontally, which in turn causes the connecting part 40 to swing, causing the longitudinal plate 4 to move from one side of the inner wall of the grid groove 31 to the other side. During the movement, the grid groove 31 extends outward, lifting and sweeping the filter paper. When the above actions are performed, the guide post 62 disengages from the recessed alignment groove 632 and slides into the concave surface 631. This achieves the horizontal "sweeping" action.

[0059] Furthermore, such as Figure 4 As shown, in the above embodiment, the connecting part 40 is connected to the inner wall of the filter box 1 by the tension spring 8, so the guide post 62 can move along the recessed alignment groove 632 and the concave surface 631 under the action of the tension spring 8.

[0060] It should be noted that during the waste filter paper recycling process, only one "sliding" action of the longitudinal plate 4 is required, or the "sliding" action can be performed periodically; or when the longitudinal plate 4 moves along the arc-shaped route, it can remain stationary at the highest point of the route, and after the winding is completed, the second half of the arc-shaped route can be executed.

[0061] As a further embodiment of the present invention, it also includes a U-shaped slot 80 that is driven to move in the vertical direction, which is used to engage with the end of one side wall of the feed hopper 11 to compress the filter paper.

[0062] Specifically, such as Figure 2 As shown, a cylinder 81 is fixedly installed on one side wall of the feed hopper 11. The cylinder 81 is fixedly connected to a U-shaped retaining groove 80 through a slot on the feed hopper 11, and the two ends of the U-shaped retaining groove 80 are arc-shaped surfaces. After the waste filter paper is replaced, the cylinder 81 drives the U-shaped retaining groove 80 away, thereby releasing the lock on the filter paper. When the filter paper replacement is completed, it is pressed down to lock the filter paper into the end of the side wall of the feed hopper 11 for fixation.

[0063] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An automated machine tool lubricating oil circulation filtration device, comprising a filter box (1), on which a feed hopper (11) is fixedly installed, and a roll material placement station (12) and a waste material collection tank (13) are symmetrically distributed about the center of the feed hopper (11), wherein the filter paper on the roll material placement station (12) covers the feed hopper (11) and is located in the waste material collection tank (13), characterized in that, The feed hopper (11) has inclined grid plates (3) on its inner walls on opposite sides. It also includes longitudinal plates (4) distributed in a plurality of grid grooves (31) on the grid plates (3). In its default state, the plates are lower than the upper surface of the grid plates (3). In the driven state, the plates extend out of the grid grooves (31) to adjust the filter paper to detach from the surface of the grid plates (3).

2. The automated machine tool lubricating oil circulation and filtration device according to claim 1, characterized in that, It also includes an oil inlet pipe (2) with one end fixedly connected to a feed barrel (21), the feed barrel (21) being centrally located within the feed hopper (11) and through which the filter paper passes under negative pressure; The distance between the feed hopper (11) and the lower part of the supporting grid plate (3) is greater than the height of the longitudinal plate (4) extending out.

3. The automated machine tool lubricating oil circulation and filtration device according to claim 1, characterized in that, In the default state, the longitudinal plate (4) is attached to the inner wall of one side of the grid groove (31).

4. The automated machine tool lubricating oil circulation and filtration device according to claim 3, characterized in that, The longitudinal plate (4) in the driven state moves along an arc-shaped path on the vertical horizontal plane and then attaches to the side wall on the side opposite to the default state.

5. The automated machine tool lubricating oil circulation and filtration device according to claim 4, characterized in that, The longitudinal plate (4) moves along the arc-shaped path while maintaining its longitudinal horizontal plane along the grid groove (31).

6. The automated machine tool lubricating oil circulation and filtration device according to claim 5, characterized in that, It also includes a rotatable lever (60), and the ends of the plurality of longitudinal plates (4) are connected to the joint (40); One end of the lever (60) is rotatably connected to the connecting part (40), while the other end is in a sliding groove fit with the movable plate (61) slidably installed at the bottom of the feed hopper (11).

7. The automated machine tool lubricating oil circulation and filtration device according to claim 6, characterized in that, The filter box (1) is fixedly installed with symmetrically distributed guide columns (62), and the joint (40) is fixedly installed with a curved guide surface (63) that slides with the guide column (62).

8. The automated machine tool lubricating oil circulation and filtration device according to claim 7, characterized in that, The guide curved surface (63) includes a concave surface (631) and recessed alignment grooves (632) disposed at both ends of the concave surface (631). In the default state, the guide post (62) is located in any of the recessed alignment grooves (632).

9. The automated machine tool lubricating oil circulation and filtration device according to claim 1, characterized in that, The waste material collection trough (13) is rotatably provided with a rounded rectangular plate (70) that is driven to maintain circumferential rotation. The rounded rectangular plate (70) is symmetrically welded with guide rods (72) whose ends are kept at a predetermined distance from one end of the waste material collection trough (13) to form a paper removal trough (71).

10. An automated machine tool lubricating oil circulation and filtration device according to claim 1, characterized in that, It also includes a U-shaped slot (80) that is driven to move in the vertical direction, which is used to engage with the end of one side wall of the feed hopper (11) to press the filter paper.

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