A CNC machine tool coolant recovery device

Abstract

This invention relates to the technical field of coolant treatment, and in particular to a coolant recovery device for CNC machine tools. The device includes a vertically arranged processing cylinder, several strips arranged on the inner wall of the processing cylinder along its circumference, and a stirring structure located in the middle of the processing cylinder. The length direction of the strips is parallel to the axis of the processing cylinder, and the strips are inclined relative to the inner wall of the processing cylinder. By causing the coolant to flow in a spiral motion within the processing cylinder, debris and impurities in the coolant can undergo multiple centrifugal rotations, extending the impurity separation time and path, and improving the separation effect. Simultaneously, this movement of the coolant allows larger particles to separate first and move to the vicinity of the inner wall of the processing cylinder. As the coolant flows downwards, the particle size of the separated impurities gradually decreases, thereby achieving stepwise separation of impurities of different particle sizes and avoiding interference from the separation of large particles with smaller particles.

Description

Technical Field

[0001] This invention relates to the technical field of coolant treatment, and in particular to a coolant recovery device for CNC machine tools. Background Technology

[0002] As the core equipment of modern manufacturing, CNC machine tools directly affect product quality and production costs through their machining accuracy and efficiency. In the cutting and grinding processes of CNC machine tools, coolant plays an indispensable role. It cools the contact area between the tool and the workpiece through forced circulation, effectively preventing thermal deformation of the workpiece and premature wear of the tool caused by heat generated by high-speed friction, thereby ensuring the stability of the machining process and the dimensional accuracy of the parts. At the same time, coolant also has the function of flushing the machining area and removing metal chips, creating the necessary conditions for continuous automated production.

[0003] However, due to the large amount of solid particulate impurities such as metal shavings and abrasive powder generated during the processing, these impurities are mixed in with the coolant and circulate in the system. The presence of impurities will not only significantly reduce the cooling efficiency and lubrication performance of the coolant, but also aggravate the wear of precision parts of the machine tool, scratch the surface of the processed workpiece, and affect the smoothness and pass rate of the product. Therefore, the separation and treatment of impurities in the coolant is one of the important measures for coolant recycling and reuse.

[0004] Traditional coolant treatment methods involve directly filtering the coolant using multi-layer filter plates. However, this method can cause the filter plates to become clogged, requiring frequent cleaning by workers. Additionally, the flow of coolant is limited by the filter plates themselves, affecting the efficiency of coolant circulation. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides a CNC machine tool coolant recovery device, the specific technical solution of which is as follows:

[0006] The present invention provides a CNC machine tool coolant recovery device, comprising a vertically arranged processing cylinder, a plurality of strips arranged on the inner wall of the processing cylinder and along the circumferential direction of the processing cylinder, and an agitation structure disposed in the middle of the processing cylinder. The length direction of the strips is parallel to the axis of the processing cylinder, and the strips are inclined relative to the inner wall of the processing cylinder. The angle between the strips and the processing cylinder is used to collect metal scraps.

[0007] A liquid supply pipe for water inlet and a liquid drain pipe for water outlet are respectively provided on the upper and lower sides of the treatment cylinder. A cleaning ring that can move vertically is provided inside the treatment cylinder. A sliding groove that cooperates with the strip plate is provided on the outer wall of the cleaning ring.

[0008] Furthermore, the cleaning ring is in the shape of an upwardly inclined cone.

[0009] Furthermore, the end of the strip away from the inner wall of the processing cylinder is provided with a guide edge extending toward the space between the strip and the processing cylinder.

[0010] Furthermore, a cap is fastened to the top of the processing cylinder, and an annular groove is provided at the bottom of the cap that is lower than the top of the processing cylinder. The annular groove is inclined, and a waste discharge pipe is connected to the lowest point of the annular groove.

[0011] Furthermore, a chassis is provided at the bottom of the processing cylinder. The chassis consists of a truncated cone in the middle, a slit corresponding to the bottom of the processing cylinder, and an annular liquid storage chamber located on the outside of the processing cylinder. The truncated cone is corresponding to the conical cleaning ring, and the bottom surface of the annular liquid storage chamber is horizontal or inclined upward.

[0012] Furthermore, a chamber is provided inside the cone, an air inlet pipe communicating with the chamber is provided at the bottom of the chassis, and an isolation pipe extending to the top of the cone is vertically provided in the middle of the chamber;

[0013] The air inlet pipe and the isolation pipe are offset from each other, the chamber is connected to the drain pipe through a metering structure, and the upper surface of the cone is densely covered with air holes.

[0014] Furthermore, the quantitative structure includes a secondary tank aligned with the isolation tube and disposed at the bottom of the chassis. The drain pipe is connected to the secondary tank, and the secondary tank is connected to the chamber. A variable diameter area is provided in the middle of the secondary tank, and a sealing plate that cooperates with the variable diameter area is provided inside the secondary tank. The sealing plate and the secondary tank are connected by a spring.

[0015] Furthermore, a post is provided at the bottom of the sealing plate. The post passes through the secondary barrel and slides relative to it. The spring is sleeved on the post. An adjusting ring is slidably sleeved on the outer wall of the post. The spring connects the adjusting ring and the post. Several flat plates are provided on the outer wall of the adjusting ring. Each flat plate has a downwardly tilted abutment plate at its end away from the adjusting ring.

[0016] At the bottom of the auxiliary barrel, a number of side platforms are provided corresponding to each of the abutment plates. A number of oblique edges are arranged vertically on the side wall of the side platform, and the abutment plate is inserted between two adjacent oblique edges.

[0017] The beneficial effects of this invention are as follows:

[0018] By causing the coolant to flow in a spiral motion within the processing cylinder, debris and impurities in the coolant can undergo continuous centrifugal motion multiple times, extending the separation time and path of impurities and improving the separation effect. Simultaneously, this movement of the coolant allows larger particles to separate first and move to the vicinity of the inner wall of the processing cylinder. As the coolant flows downwards, the particle size of the separated impurities gradually decreases. This enables stepwise separation of impurities of different particle sizes and avoids interference from the separation of large particles with smaller particles. Since the coolant can be continuously introduced into or exported from the processing cylinder, a continuous processing mode can be achieved, improving work efficiency. Furthermore, this recovery mode prevents clogging, and the coolant maintains high flowability within the processing cylinder. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 yes Figure 1 Schematic diagram of cross-section structure;

[0022] Figure 3 yes Figure 1 Explosion structure diagram;

[0023] Figure 4 This is a top view of the processing cylinder structure in an embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the chassis structure in an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the quantitative structure in an embodiment of the present invention.

[0026] Figure label:

[0027] 1. Processing cylinder; 2. Strip plate; 3. Agitator structure; 4. Liquid supply pipe; 5. Liquid discharge pipe; 6. Cleaning ring; 7. Guide edge; 8. Threaded rod; 9. Cap; 10. Annular groove; 11. Waste discharge pipe; 12. Chassis; 13. Frustum; 14. Slit; 15. Annular storage chamber; 16. Chamber; 17. Air inlet pipe; 18. Isolation pipe; 19. Pump body; 20. Metering structure; 21. Auxiliary tank; 22. Variable diameter zone; 23. Sealing plate; 24. Spring; 25. Insert column; 26. Adjusting ring; 27. Flat plate; 28. Backing plate; 29. ​​Side platform; 30. Slanted retaining edge. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0029] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0030] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. This embodiment is written in a progressive manner.

[0031] like Figures 1 to 6 As shown, a CNC machine tool coolant recovery device of the present invention includes a vertically arranged processing cylinder 1, a plurality of strips 2 arranged on the inner wall of the processing cylinder 1 and along the circumferential direction of the processing cylinder 1, and an agitation structure 3 disposed in the middle of the processing cylinder 1. The length direction of the strips 2 is parallel to the axis of the processing cylinder 1, and the strips 2 are inclined relative to the inner wall of the processing cylinder 1. The angle between the strips 2 and the processing cylinder 1 is used to collect metal scraps.

[0032] A liquid supply pipe 4 for water inlet and a liquid drain pipe 5 for water outlet are respectively provided on the upper and lower sides of the treatment cylinder 1. A cleaning ring 6 that can move vertically is provided inside the treatment cylinder 1. A sliding groove that cooperates with the strip plate 2 is provided on the outer wall of the cleaning ring 6.

[0033] In this invention, the processing cylinder 1 provides space for coolant processing. To facilitate automatic coolant flow, the processing cylinder 1 can be set vertically, allowing the coolant to flow within it. As the coolant rotates and flows along the circumference of the processing cylinder 1, metal debris in the coolant can move towards the inner wall of the processing cylinder 1 due to centrifugal force. At this time, the debris is less affected by gravity and can be considered as moving in a dispersed manner on a horizontal plane. Alternatively, the processing cylinder 1 can be set horizontally. In this case, the flow of coolant requires a delivery pump to provide the power, and the centrifugal motion trajectory of the debris is on a vertical plane. Gravity will have a certain influence on the movement of the debris. If the mass of the debris is large, its inertial force can overcome the effect of gravity. In this case, this arrangement of the processing cylinder 1 can also meet the requirements of this invention.

[0034] Several strips 2 are equidistantly distributed along the circumference of the inner wall of the processing cylinder 1. The strips 2 are inclined relative to the inner wall of the processing cylinder 1, so that the strips 2 and the inner wall of the processing cylinder 1 can form a trough shape to facilitate the interception and collection of impurities in the centrifugal state. The acute angle between the strips 2 and the inner wall of the processing cylinder 1 needs to be opposite to the direction of the rotational flow of the coolant in the processing cylinder 1 in order to better collect impurities. The agitation structure 3 is set in the processing cylinder 1 and can agitate the coolant in the processing cylinder 1 to rotate and flow. Specifically, the agitation structure 3 can be composed of a rotating shaft and several fan blades installed on the rotating shaft. If the coolant can flow automatically in the processing cylinder 1, then the fan blades can be flat plates, and the flat plates can be coplanar with the rotating shaft. In this case, the fan blades do not need to provide auxiliary power for the flow of coolant. However, if the coolant cannot flow automatically, then the fan blades can be installed at an angle to use the inclined thrust provided by the rotation to help the coolant to flow in a spiral. This spiral flow can be divided into centrifugal motion and flow along the axis of the processing cylinder 1.

[0035] The cleaning ring 6 slides in contact with the inner wall of the processing cylinder 1, and the cleaning ring 6 and the processing cylinder 1 are coaxially arranged. The cleaning ring 6 can move along the axis of the processing cylinder 1 inside the processing cylinder 1. Since several strips 2 are provided on the inner wall of the processing cylinder 1, corresponding grooves need to be opened on the cleaning ring 6 to facilitate its use with the strips 2. That is, the strips 2 can be regarded as a way of sliding through the cleaning ring 6. The movement of the cleaning ring 6 can be provided by a threaded rod 8 that passes through the cleaning ring 6 and is threadedly connected to the cleaning ring 6. Multiple threaded rods 8 can be set. When the threaded rod 8 rotates, it can push the cleaning ring 6 to move up and down. At the same time, the rotation of the threaded rod 8 and the rotation of the agitation structure 3 can be provided by a motor.

[0036] During use, coolant is introduced into the processing cylinder 1 through the supply pipe 4, and the coolant in the processing cylinder 1 needs to be maintained at a specified level. This can be achieved by setting the drain pipe 5 as an overflow pipe, utilizing the height characteristics of the overflow pipe to keep the coolant level in the processing cylinder 1 at the specified height. Alternatively, a valve structure can be installed between the processing cylinder 1 and the drain pipe 5, as long as the purpose of maintaining the coolant level in the processing cylinder 1 is achieved. The rotating agitator 3 agitates the coolant in the processing cylinder 1, causing it to rotate and flow. Simultaneously, because the supply pipe 4 continuously introduces coolant into the processing cylinder 1, the drain pipe 5 continuously discharges coolant, thus continuously replenishing and draining the coolant in the processing cylinder 1. Combined with the agitator 3's effect on the coolant... The agitation motion causes the coolant in the processing cylinder 1 to flow in a spiral motion from top to bottom. Simultaneously, debris and impurities in the coolant undergo centrifugal motion. Because the coolant flows in a spiral pattern, the metal debris undergoes multiple centrifugal rotations, effectively extending the centrifugal time without interfering with the coolant flow. The debris moves to the vicinity of the inner wall of the processing cylinder 1 and accumulates between the strip plate 2 and the processing cylinder 1. The centrifuged coolant is continuously discharged through the drain pipe 5, thus achieving continuous coolant processing. Since the cleaning ring 6 can move within the processing cylinder 1, it can push the debris collected between the strip plate 2 and the processing cylinder 1 upwards until the debris rises above the liquid surface and detaches from the coolant, thereby achieving debris removal.

[0037] By causing the coolant to flow in a spiral motion within the processing cylinder 1, the debris and impurities in the coolant can undergo multiple centrifugal rotations, extending the impurity separation time and path, and improving the separation effect. Simultaneously, this movement of the coolant allows larger particles to separate first and move to the vicinity of the inner wall of the processing cylinder 1. As the coolant flows downwards, the particle size of the separated impurities gradually decreases, thus achieving stepwise separation of impurities of different sizes and avoiding interference from the separation of large particles on smaller particles. Since the coolant can be continuously introduced into or exported from the processing cylinder 1, a continuous processing mode can be achieved, improving work efficiency. Furthermore, this recovery mode prevents clogging, and the coolant maintains high flowability within the processing cylinder 1.

[0038] Furthermore, the cleaning ring 6 is a cone shape that slopes upwards.

[0039] When the cleaning ring 6 is planar, it moves within the processing cylinder 1. Impurities between the inner wall of the processing cylinder 1 and the strip 2 remain on the upper surface of the cleaning ring 6. The movement of the cleaning ring 6 pushes the coolant above it around the inner wall of the cleaning ring 6 and flows to the lower side of the cleaning ring 6. At this time, this part of the coolant easily carries impurities to the lower side of the cleaning ring 6, which will cause the impurities to be missed and cannot completely remove the impurities between the inner wall of the processing cylinder 1 and the strip 2. To solve this problem, the shape of the cleaning ring 6 can be specially set, such as setting the shape of the cleaning ring 6 to be conical, with an acute angle between the upper surface of the cleaning ring 6 and the inner wall of the processing cylinder 1. This can more effectively collect and push the impurities, reduce the interference of the coolant flow on the impurity discharge process, and when the cleaning ring 6 moves to the top of the processing cylinder 1, the tilted state of the cleaning ring 6 can facilitate the automatic sliding and discharge of impurities on its upper surface, improving the convenience of use.

[0040] Furthermore, the end of the strip 2 away from the inner wall of the processing cylinder 1 is provided with a guide edge 7 extending toward the space between the strip 2 and the processing cylinder 1.

[0041] When collecting impurities in the area between the processing cylinder 1 and the strip plate 2, some of the coolant flowing near the inner wall of the processing cylinder 1 will also enter the area between the processing cylinder 1 and the strip plate 2. The flow of this part of the coolant will impact the original coolant and impurities between the processing cylinder 1 and the strip plate 2, thus easily squeezing out the impurities. The guide edge 7 can intercept the impurities a second time, so that the impurities stay between the processing cylinder 1 and the strip plate 2. At the same time, the guide edge 7 will not interfere with the movement of the impurities into the area between the processing cylinder 1 and the strip plate 2.

[0042] Furthermore, a cap 9 is fastened to the top of the processing cylinder 1, and an annular groove 10 is provided at the bottom of the cap 9, which is lower than the top of the processing cylinder 1. The annular groove 10 is inclined, and a waste discharge pipe 11 is connected to the lowest point of the annular groove 10.

[0043] The cap 9 is mainly used to seal the top of the treatment cylinder 1, and the agitator 3, the liquid supply pipe 4 and the threaded rod 8 can all be installed on the cap 9;

[0044] like Figure 3 As shown, there is a certain space between the top of the inner wall of the cap 9 and the top of the processing cylinder 1. This space is mainly used to allow the impurities carried to the top of the processing cylinder 1 by the cleaning ring 6 to slide outward. The ring groove 10 is mainly used to collect the sliding impurities. At the same time, the inclined setting at the bottom of the ring groove 10 can facilitate the movement of impurities toward the discharge pipe 11 and discharge them through the discharge pipe 11. Since the cleaning ring 6 is conical in shape, the cleaning ring 6 can also carry a small amount of coolant to the top of the processing cylinder 1. At this time, this part of the coolant can provide flushing power for the impurities, which facilitates the discharge of impurities.

[0045] Furthermore, a chassis 12 is provided at the bottom of the processing cylinder 1. The chassis 12 consists of a cone 13 located in the middle, a slit 14 corresponding to the bottom of the processing cylinder 1, and an annular liquid storage chamber 15 located on the outside of the processing cylinder 1. The cone 13 is corresponding to the conical cleaning ring 6, and the bottom surface of the annular liquid storage chamber 15 is horizontal or inclined upward.

[0046] The cone 13 is designed so that when the cleaning ring 6 moves to the bottom of the processing cylinder 1, the bottom surface of the cleaning ring 6 fits against the upper surface of the cone 13, thus preventing impurities from accumulating between the cone 13 and the cleaning ring 6. The annular liquid storage chamber 15 stores coolant, and the coolant in the annular liquid storage chamber 15 can be discharged through the slit 14. When the cleaning ring 6 moves downward, due to the shape characteristics of the cleaning ring 6, the coolant in the lower area of ​​the cleaning ring 6 will bypass the inner wall of the cleaning ring 6 and flow to the upper side of the cleaning ring 6. At this time, some impurities between the processing cylinder 1 and the strip 2 will move to the upper side of the cleaning ring 6 along with this part of the coolant, while the remaining impurities will be affected by the coolant. The cleaning ring 6 moves downward under the thrust of the cleaning ring 6. When the cleaning ring 6 moves down to a position close to the cone 13, the coolant discharged from the slit 14 will blow the impurities at the bottom of the cleaning ring 6 and push the cleaning ring 6 to the lower surface of the cleaning ring 6. Combined with the rotational flow of the coolant in the processing cylinder 1, this part of the impurities can also move to the upper side of the cleaning ring 6, realizing the transport of impurities on the lower side of the cleaning ring 6. When the cleaning ring 6 contacts the cone 13, the cleaning ring 6 seals the slit 14, thereby preventing impurities from entering the annular liquid storage chamber 15. At the same time, the horizontal or inclined setting of the ground of the annular liquid storage chamber 15 can also prevent impurities from entering the annular liquid storage chamber 15.

[0047] Furthermore, a chamber 16 is provided inside the truncated cone 13, and an air inlet pipe 17 communicating with the chamber 16 is provided at the bottom of the chassis 12. An isolation pipe 18 extending to the top of the truncated cone 13 is vertically provided in the middle of the chamber 16.

[0048] The air inlet pipe 17 and the isolation pipe 18 are offset from each other. The chamber 16 is connected to the drain pipe 5 through the metering structure 20. The upper surface of the cone 13 is densely covered with air holes.

[0049] The coolant flowing spirally inside the treatment cylinder 1 moves toward the middle area of ​​the top of the cone 13 and flows into the chamber 16 through the isolation pipe 18. This allows the coolant to flow out away from the strip plate 2. The coolant in the chamber 16 can be drained through the metering structure 20 and the drain pipe 5. The air inlet pipe 17 can continuously introduce air into the chamber 16. The isolation pipe 18 can prevent air from being directly discharged to the middle area on the upper side of the cone 13. The air in the chamber 16 is discharged through several air holes on the cone 13, thereby dispersing the air and facilitating the separation of air bubbles from the coolant discharge path. The air bubbles can adsorb particulate impurities in the coolant, thereby further improving the purification and recovery effect of the coolant.

[0050] A pump body 19 is also provided at the bottom of the chassis 12. The input end and output end of the pump body 19 are connected to the chamber 16 and the annular liquid storage chamber 15, respectively. In this way, the pump body 19 can introduce part of the purified coolant in the chamber 16 into the annular liquid storage chamber 15.

[0051] Furthermore, the quantitative structure 20 includes a secondary tank 21 aligned with the isolation tube 18 and located at the bottom of the chassis 12. The drain pipe 5 is connected to the secondary tank 21, and the secondary tank 21 is connected to the chamber 16. A variable diameter area 22 is provided in the middle of the secondary tank 21, and a sealing plate 23 that works in conjunction with the variable diameter area 22 is provided inside the secondary tank 21. The sealing plate 23 is connected to the secondary tank 21 by a spring 24.

[0052] The spring 24 provides elastic thrust to the sealing plate 23, causing the sealing plate 23 to abut against the variable diameter area 22. At this time, the sealing plate 23 blocks the auxiliary tank 21, preventing the coolant in the chamber 16 from draining into the auxiliary tank 21. When the coolant level in the processing cylinder 1 reaches the specified height, the weight of the coolant overcomes the elastic force of the spring 24 and pushes the sealing plate 23 to open. At this time, the coolant in the chamber 16 can flow smoothly into the auxiliary tank 21 and be drained through the drain pipe 5. Using this structure, the coolant level in the processing cylinder 1 can be easily kept at the specified position.

[0053] Furthermore, a post 25 is provided at the bottom of the sealing plate 23. The post 25 passes through the auxiliary barrel 21 and slides relative to it. A spring 24 is sleeved on the post 25. An adjusting ring 26 is slidably sleeved on the outer wall of the post 25. The spring 24 connects the adjusting ring 26 and the post 25. Several flat plates 27 are provided on the outer wall of the adjusting ring 26. The ends of each flat plate 27 away from the adjusting ring 26 are inclined downward and rotatably provided with a stop plate 28.

[0054] At the bottom of the auxiliary barrel 21, a number of side platforms 29 are provided corresponding to each abutment plate 28. A number of inclined retaining edges 30 are arranged vertically on the side wall of the side platform 29, and the abutment plate 28 is inserted between two adjacent inclined retaining edges 30.

[0055] Spring 24 provides upward pulling force to the insert 25 and downward pulling force to the adjusting ring 26. The adjusting ring 26 pushes the abutment 28 against the side wall of the side platform 29 via the plate 27. At this time, due to the downward inclination of the abutment 28 and the setting of the inclined locking edge 30, the abutment 28 can be locked onto the side platform 29, thereby locking the position of the adjusting ring 26. Spring 24 provides a specified elastic force to the insert 25 and the sealing plate 23. When it is necessary to raise the liquid level in the treatment cylinder 1, the adjusting ring 26 can be directly pushed upward. Plate 28 slides out from between two adjacent inclined edges 30, and plate 28 rotates on plate 27. When plate 28 moves to the position of the corresponding inclined edge 30, plate 28 can be re-engaged between the two adjacent inclined edges 30. This adjusts the elastic force provided by spring 24 to sealing plate 23. When it is necessary to lower the liquid level in the treatment cylinder 1, the adjusting ring 26 can be moved down in the same way. To improve ease of use, a spring sheet can be provided between plate 27 and plate 28 to facilitate the provision of elastic force to plate 28.

[0056] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A coolant recovery device for a numerically controlled machine tool, characterized by comprising: The application relates to a vertical processing cylinder, a plurality of strip plates arranged on the inner wall of the processing cylinder and along the circumferential direction of the processing cylinder, and an agitating structure arranged in the middle of the processing cylinder, the length direction of the strip plates is parallel to the axis of the processing cylinder, the strip plates are inclined relative to the inner wall of the processing cylinder, and the included angle position between the strip plates and the processing cylinder is used for collecting metal scraps. Liquid supply pipes for water inlet and liquid discharge pipes for water outlet are arranged on the upper and lower sides of the processing cylinder respectively, a cleaning ring capable of moving vertically is arranged in the processing cylinder, and a sliding groove for cooperation with the strip plates is arranged on the outer wall of the cleaning ring. A bottom disc is arranged at the bottom of the processing cylinder, the bottom disc is composed of a conical frustum located in the middle, a slit arranged corresponding to the bottom of the processing cylinder, and an annular liquid storage chamber located outside the processing cylinder, the conical frustum is arranged corresponding to the conical cleaning ring, and the bottom surface of the annular liquid storage chamber is horizontal or upwardly inclined. A cavity is arranged in the conical frustum, an air inlet pipe in communication with the cavity is arranged at the bottom of the bottom disc, and an isolation pipe extending to the top of the conical frustum is vertically arranged in the middle of the cavity. The air inlet pipe and the isolation pipe are offset from each other, the cavity is in communication with the liquid discharge pipe through a quantitative structure, and the upper surface of the conical frustum is densely covered with air holes. The quantitative structure comprises a sub-barrel arranged corresponding to the isolation pipe and at the bottom of the bottom disc, the liquid discharge pipe is in communication with the sub-barrel, the sub-barrel is in communication with the cavity, a variable-diameter area is arranged in the middle of the sub-barrel, an enclosing plate for cooperation with the variable-diameter area is arranged in the sub-barrel, and the enclosing plate and the sub-barrel are connected through a spring. A plug column is arranged at the bottom of the enclosing plate, the plug column penetrates through the sub-barrel and is relatively slidable, the spring is sleeved on the plug column, an adjusting ring is slidably sleeved on the outer wall of the plug column, the spring connects the adjusting ring and the plug column, a plurality of flat plates are arranged on the outer wall of the adjusting ring, and the end portions of the flat plates away from the adjusting ring are downwardly and rotationally provided with abutting plates. A plurality of side tables corresponding to the abutting plates are arranged at the bottom of the sub-barrel, a plurality of inclined clamping edges are vertically arranged on the side walls of the side tables, and the abutting plates are clamped into corresponding adjacent two inclined clamping edges.

2. A coolant recovery device for a numerically controlled machine tool according to claim 1, characterized in that, The shape of the cleaning ring is a conical shape upwardly inclined.

3. A coolant recovery device for a numerically controlled machine tool according to claim 1, characterized in that, The end portion of the strip plate away from the inner wall of the processing cylinder is provided with a guide edge extending towards the space between the strip plate and the processing cylinder.

4. A coolant recovery device for a numerically controlled machine tool according to claim 1, characterized in that, A buckle cap is buckled at the top of the processing cylinder, an annular groove lower than the top of the processing cylinder is arranged at the bottom of the buckle cap, the annular groove is inclined, and the lowest point of the annular groove is in communication with a foreign matter discharge pipe.

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