A cutting fluid filtering device for a numerical control machine tool

Abstract

The present invention relates to the field of filtration technology, and particularly relates to a cutting fluid filtration device for a numerical control machine tool, which comprises a housing, a disc, and a filtration component; a separation cylinder is arranged inside the housing; an annular groove is arranged on the inner side wall of the separation cylinder; a liquid outlet is arranged at the upper end of the separation cylinder; a liquid inlet pipe arranged vertically is inserted into the liquid outlet; an installation cylinder is rotatably installed coaxially at the lower end of the liquid inlet pipe; a plurality of discs are arranged and distributed up and down; the discs are in the shape of a conical cylinder with the small end facing upward; the horizontal section of the disc is in a shape of an annular wave; the annular wave-shaped disc promotes the rotation of the suspension in the disc gap, reduces the differential speed between the disc and the suspension, reduces the hysteresis of the rotation of the suspension, and improves the rotation speed of the suspension. At the same time, the annular wave-shaped disc is conducive to the collection of impurity particles at the concave part of the disc wave, so as to facilitate the collection of impurity particles at the groove under the action of centrifugal force and improve the solid-liquid separation effect.

Description

Technical Field

[0001] The present invention relates to the technical field of filtration, and particularly to a cutting fluid filtration device for a numerical control machine tool. Background Art

[0002] A separation and filtration device is a device used to remove impurities in fluids (such as water, air, oil, etc.). Cutting fluid is commonly used during machine tool processing, and waste chip impurities generated by the tool cutting the part will be mixed into the cutting fluid. In order to improve the utilization rate and safety of the cutting fluid, it is necessary to effectively separate and filter the impurities in the cutting fluid. Devices for filtering the cutting fluid of a numerical control machine tool include disc separators, etc.

[0003] In the prior art, a disc separator is provided with a rotating drum, which is driven by a motor through a transmission device to rotate at a high speed. There is a set of conical discs nested with each other and with the small ends facing upward inside the rotating drum. There is a very small gap between the discs. The suspension is added to the rotating drum through a feed pipe located at the center of the rotating drum. When the suspension flows through the gap between the discs, the impurities settle under the action of the centrifuge and slide downward along the surface of the discs to separate from the discs, and then the impurities accumulate at the part with the largest diameter inside the rotating drum. The separated liquid flows upward along the surface of the discs and is discharged from the liquid outlet above the rotating drum. The discs shorten the sedimentation distance of solid particles and expand the sedimentation area of the rotating drum. The solids accumulated in the rotating drum can be removed manually by disassembling the rotating drum after the separator stops, or can be discharged from the rotating drum through a slag discharge mechanism without stopping the machine. However, when the suspension flows through the gap between the discs, there is a differential speed between the rotation of the discs and the rotation of the suspension in the disc gap, that is, the rotation of the suspension has a lag, and the lagging flowing suspension easily re-entrains the centrifuged impurity particles, thus affecting the collection of the impurity particles to the part with the largest diameter inside the rotating drum, and further resulting in poor separation effect of the impurities and the cutting fluid. Summary of the Invention

[0004] The present invention provides a cutting fluid filtration device for a numerical control machine tool to solve the above problems.

[0005] A cutting fluid filtration device for a numerical control machine tool of the present invention adopts the following technical solutions: A cutting fluid filtration device for a numerical control machine tool includes a housing, discs, and a filtration component; a separation cylinder with a vertical axis is provided inside the housing; the separation cylinder is rotatably fitted inside the housing; an annular groove is provided on the inner side wall of the separation cylinder; the vertical cross-section of the groove is in a V shape with the small end away from the axis of the separation cylinder; a liquid outlet is provided at the upper end of the separation cylinder; a liquid inlet pipe arranged vertically is inserted into the liquid outlet; the lower end of the liquid inlet pipe is rotatably installed coaxially with an installation cylinder; the liquid inlet pipe and the installation cylinder are communicated; the lower end of the installation cylinder extends to the bottom of the separation cylinder; the upper end of the installation cylinder and the separation cylinder are fixedly connected by a connecting rod.

[0006] There are multiple discs, which are distributed vertically; the discs are in the shape of a conical cylinder with the small end facing upward; the horizontal cross-section of the discs is in a circular wave shape; the discs are coaxially fixed on the side wall of the installation cylinder; there is a flow gap between the discs and the installation cylinder; the circular wave-shaped discs promote the rotation of the suspension in the disc gap, reduce the differential speed between the discs and the suspension, reduce the hysteresis of the rotation of the suspension, and increase the rotation speed of the suspension. At the same time, the circular wave-shaped discs are conducive to the accumulation of impurity particles in the concave parts of the disc waves, so as to facilitate the accumulation of impurity particles at the grooves under the action of centrifugal force; the filtering component is arranged on the side wall of the separation cylinder and is used to filter the impurity particles accumulated at the grooves.

[0007] Further, a collection cavity is formed between the separation cylinder and the outer shell; there are multiple impurity discharge holes distributed on the side wall of the separation cylinder; the impurity discharge holes connect the grooves and the collection cavity; a blocking cylinder slides up and down on the inner wall of the separation cylinder; the upper end of the blocking cylinder seals the impurity discharge holes; an auxiliary component is arranged between the blocking cylinder and the separation cylinder, and the auxiliary component is used to drive the blocking cylinder to move downwards after the impurities accumulate at the grooves, so that the grooves and the collection cavity are connected. Part of the impurities are discharged into the collection cavity from the impurity discharge holes under the action of centrifugal force.

[0008] Further, the filtering component includes multiple partition plates; the multiple partition plates are evenly distributed along the circumferential direction of the separation cylinder; the partition plates are arranged in the grooves; the partition plates are vertically arranged and arranged along the radial direction of the separation cylinder; the partition plates include two plate bodies distributed up and down; the upper plate body is fixed on the inner wall of the separation cylinder, and the lower plate body is fixed on the side wall of the blocking cylinder; an insertion cylinder is fixed at the upper end of the lower plate body; the insertion cylinder is inserted into the lower end of the upper plate body in a sliding manner up and down to realize the telescopic cooperation between the two plate bodies; the inside of the plate body is hollow to form a filtering cavity; the filtering cavities in the two plate bodies are connected through the insertion cylinder; the filtering cavity of the upper plate body is connected to the liquid outlet through a channel built in the inner wall of the separation cylinder; a one-way valve is arranged in the channel; a collection groove is formed between the plate body and the inner wall of the separation cylinder; filtering holes are opened on the end surface of the plate body surrounding the collection groove; the filtering holes are connected to the filtering cavity.

[0009] Further, the partition plates are inclined; the collection groove is arranged on the side where the included angle between the partition plate and the inner wall of the separation cylinder is acute. The separation cylinder drives the discs to rotate, and the impurities slide downward along the surface of the discs under the action of centrifugal force and are separated from the discs, and accumulate at the grooves. Due to the blockage of the partition plates, the impurities are collected in the collection groove, and the filtering holes on the plate bodies of the partition plates filter the impurities. The filtered liquid enters the filtering cavity and flows from the filtering cavity to the liquid outlet to further filter and separate the liquid near the impurities, improving the solid-liquid separation effect.

[0010] Further, the upper end of the vertical cross-section of the disc is in an arc shape extending upward and outward to prevent impurities from moving upward along the disc and flowing to the liquid outlet.

[0011] Furthermore, the lower end of the vertical section of the disc is in an arc shape extending upward and outward, so that when the impurities move downward along the disc to the lower end of the disc, the impurities are guided to move toward the groove, thereby reducing the resistance of the impurities moving from the disc to the groove and promoting the separation of the impurities and the liquid.

[0012] Furthermore, the disc has a plurality of flow holes distributed circumferentially.

[0013] Furthermore, a support column is fixed on the upper end of the outer shell; the support column and the separation cylinder are coaxial; the upper end of the support column extends to the top of the outer shell, and the lower end is rotatably matched with the liquid outlet; a liquid outlet pipe is provided in the support column; the liquid outlet pipe is connected to the liquid outlet; a mounting hole is provided at the center of the support column; and the liquid inlet pipe passes through the mounting hole.

[0014] Furthermore, a collecting box is provided in the collecting chamber; the collecting box is annular; the collecting box is sleeved on the outside of the separation cylinder and fixed on the outer shell; the opening of the collecting box is arranged upward; the height of the opening of the collecting box is lower than the height of the outlet hole.

[0015] Furthermore, a rotating seat is rotatably installed in the shell; the rotating seat is fixedly connected to the separation cylinder; a frame is fixed on the shell; a motor is fixed on the frame; a pulley is connected between the output shaft of the motor and the rotating seat. The motor drives the rotating seat to rotate through the pulley, and the rotating seat drives the separation cylinder to rotate.

[0016] The beneficial effects of the present invention are:

[0017] 1. The annular wavy disc promotes the rotation of the suspension in the disc gap, reduces the differential speed between the disc and the suspension, reduces the hysteresis of the suspension rotation, and increases the rotation speed of the suspension. At the same time, the annular wavy disc is conducive to the gathering of impurity particles in the concave part of the disc wave, thereby facilitating the gathering of impurity particles to the groove under the action of centrifugal force, thereby improving the solid-liquid separation effect.

[0018] 2. The upper end of the vertical section of the disc is in the shape of an arc extending upward and outward to prevent impurities from moving upward along the disc and preventing impurities from flowing to the liquid outlet. The lower end of the vertical section of the disc is in the shape of an arc extending upward and outward to guide the impurities to move to the groove when the impurities move downward along the disc to the lower end of the disc, thereby reducing the resistance of the impurities moving from the disc to the groove and promoting the separation of impurities and liquid.

[0019] 3. The separation cylinder drives the disc to rotate. Under the action of centrifugal force, the impurities slide downward along the surface of the disc and separate from the disc, and gather in the groove. Due to the obstruction of the partition, the impurities gather in the collection tank. The filter holes on the plate body of the partition filter the impurities. The filtered liquid enters the filter chamber and flows from the filter chamber to the liquid outlet to further filter and separate the liquid near the impurities, thereby improving the effect of solid-liquid separation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for use in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 It is a schematic structural diagram of an embodiment of a cutting fluid filtering device for a numerically controlled machine tool of the present invention;

[0022] Figure 2 It is a side view of an embodiment of a cutting fluid filtering device for a numerically controlled machine tool of the present invention;

[0023] Figure 3 It is Figure 2 a cross-sectional view taken along line A-A in

[0024] Figure 4 It is Figure 3 an enlarged view of part C in

[0025] Figure 5 It is a front view of an embodiment of a cutting fluid filtering device for a numerically controlled machine tool of the present invention;

[0026] Figure 6 It is Figure 5 a cross-sectional view taken along line B-B in

[0027] Figure 7 It is Figure 6 an enlarged view of part D in

[0028] Figure 8 It is a schematic diagram of a disc of an embodiment of a cutting fluid filtering device for a numerically controlled machine tool of the present invention.

[0029] In the figure: 100, housing; 110, support column; 111, liquid outlet pipe; 120, motor; 121, rotating seat; 130, collection box; 200, separation cylinder; 210, liquid outlet; 220, liquid inlet pipe; 230, installation cylinder; 240, impurity outlet hole; 250, baffle cylinder; 251, auxiliary cavity; 252, limit groove; 300, disc; 310, flow-through hole; 400, partition plate; 410, filtering cavity; 420, filtering hole; 430, collecting groove; 440, channel. Detailed implementation manners

[0030] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] An embodiment of a cutting fluid filtering device for a numerically controlled machine tool according to the present invention is as Figures 1 to 8 shown: A cutting fluid filtering device for a numerically controlled machine tool includes a housing 100, a disc 300, and a filtering assembly; a separation cylinder 200 with a vertical axis is provided inside the housing 100; the separation cylinder 200 is rotationally fitted inside the housing 100; an annular groove is provided on the inner side wall of the separation cylinder 200; the vertical cross-section of the groove is in a V shape with the small end away from the axis of the separation cylinder 200; a liquid outlet 210 is provided at the upper end of the separation cylinder 200; a liquid inlet pipe 220 arranged vertically is inserted into the liquid outlet 210; an installation cylinder 230 is rotationally installed coaxially at the lower end of the liquid inlet pipe 220; the liquid inlet pipe 220 and the installation cylinder 230 are communicated; the lower end of the installation cylinder 230 extends to the bottom of the separation cylinder 200; the upper end of the installation cylinder 230 and the separation cylinder 200 are fixedly connected by a connecting rod. A support column 110 is fixed at the upper end of the housing 100; the support column 110 and the separation cylinder 200 are coaxial; the upper end of the support column 110 extends above the housing 100, and the lower end is rotationally fitted with the liquid outlet 210; a liquid outlet pipe 111 is provided inside the support column 110; the liquid outlet pipe 111 and the liquid outlet 210 are communicated; an installation hole is provided at the center of the support column 110; the liquid inlet pipe 220 passes through the installation hole.

[0032] A rotating seat 121 is rotationally installed inside the housing 100; the rotating seat 121 and the separation cylinder 200 are fixedly connected; a frame is fixed on the housing 100; a motor 120 is fixed on the frame; a pulley is connected between the output shaft of the motor 120 and the rotating seat 121. The motor 120 drives the rotating seat 121 to rotate through the pulley, and the rotating seat 121 drives the separation cylinder 200 to rotate.

[0033] A collection chamber is formed between the separation cylinder 200 and the outer shell 100; a plurality of impurity discharge holes 240 are distributed on the side wall of the separation cylinder 200; the impurity discharge holes 240 communicate the groove and the collection chamber; a blocking cylinder 250 slides up and down on the inner wall of the separation cylinder 200; the upper end of the blocking cylinder 250 blocks the impurity discharge holes 240; an auxiliary component is arranged between the blocking cylinder 250 and the separation cylinder 200, and the auxiliary component is used to drive the blocking cylinder 250 to move downwards when impurities gather at the groove, so that the groove and the collection chamber are communicated. Part of the impurities are discharged from the impurity discharge holes 240 into the collection chamber under the action of centrifugal force. A collection box 130 is arranged in the collection chamber; the collection box 130 is annular; the collection box 130 is sleeved outside the separation cylinder 200 and fixed on the outer shell 100; the opening of the collection box 130 faces upwards; the height of the opening of the collection box 130 is lower than the height of the impurity discharge holes 240. The auxiliary component includes an auxiliary valve and a limiting groove 252; the limiting groove 252 is opened on the groove wall of the groove; the limiting groove 252 is arranged at the orifice of the impurity discharge hole 240 close to the separation cylinder 200; the upper end of the blocking cylinder 250 is slidably matched with the limiting groove 252; an auxiliary chamber 251 is formed between the blocking cylinder 250 and the separation cylinder 200. The auxiliary valve is arranged in the auxiliary chamber 251. Initially, the auxiliary chamber 251 is filled with water. Under the action of water pressure, the blocking cylinder 250 moves upwards to block the impurity discharge holes 240, and at the same time, the upper end of the blocking cylinder 250 abuts against the upper groove wall of the limiting groove 252; when it is necessary to open the impurity discharge holes 240 to discharge impurities, the auxiliary valve is opened to drain the water pressure in the auxiliary chamber 251, and the blocking cylinder 250 moves downwards away from the impurity discharge holes 240, so that the groove and the collection chamber are communicated through the impurity discharge holes 240, and part of the impurities are discharged from the impurity discharge holes 240 into the collection chamber under the action of centrifugal force. After the impurity discharge is completed, the auxiliary valve is closed, and water is recharged into the auxiliary chamber 251. Under the action of water pressure, the blocking cylinder 250 moves upwards to abut against the upper groove wall of the limiting groove 252 to block the impurity discharge holes 240 again.

[0034] There are multiple discs 300 arranged vertically; the discs 300 are in the shape of a truncated cone with the small end facing upward; the horizontal cross-section of the discs 300 is in a circular wavy shape; the discs 300 are coaxially fixed on the side wall of the mounting cylinder 230; there is a flow gap between the discs 300 and the mounting cylinder 230; the circular wavy discs 300 promote the rotation of the suspension in the gap between the discs 300, reduce the differential speed between the discs 300 and the suspension, reduce the lag of the rotation of the suspension, and increase the rotation speed of the suspension. At the same time, the circular wavy discs 300 are conducive to the accumulation of impurity particles in the concave parts of the waves of the discs 300, so that it is conducive to the accumulation of impurity particles at the grooves under the action of centrifugal force; a plurality of flow holes 310 are circumferentially distributed on the discs 300. The upper end of the vertical cross-section of the discs 300 is in an arc shape extending upward and outward to prevent impurities from moving upward along the discs 300 and prevent the impurities from flowing to the liquid outlet 210. The lower end of the vertical cross-section of the discs 300 is in an arc shape extending upward and outward. When the impurities move downward along the discs 300 to the lower end of the discs 300, it guides the impurities to move to the grooves, reduces the resistance of the impurities moving from the discs 300 to the grooves, and promotes the separation of the impurities and the liquid.

[0035] The filtering assembly is arranged on the side wall of the separation cylinder 200 and is used for filtering the impurity particles accumulated at the grooves. The filtering assembly includes a plurality of partition plates 400; the plurality of partition plates 400 are evenly distributed along the circumference of the separation cylinder 200; the partition plates 400 are arranged in the grooves; the partition plates 400 are vertically arranged and arranged along the radial direction of the separation cylinder 200; the partition plates 400 include two plate bodies arranged vertically; the upper plate body is fixed on the inner wall of the separation cylinder 200, and the lower plate body is fixed on the side wall of the retaining cylinder 250; an insertion cylinder is fixed at the upper end of the lower plate body; the insertion cylinder is slidably inserted into the lower end of the upper plate body to achieve the telescopic fit between the two plate bodies;

[0036] The interior of the plate body is hollow to form a filtering cavity 410; the filtering cavities 410 in the two plate bodies are connected through an inserting cylinder; the filtering cavity 410 of the upper plate body is connected to the liquid outlet 210 through a channel 440 built in the inner wall of the separating cylinder 200; a check valve is provided in the channel 440 to prevent the liquid at the liquid outlet from flowing backward downward through the channel 440; a collecting groove 430 is formed between the inner wall of the plate body and the separating cylinder 200; filtering holes 420 are formed on the end surface of the plate body surrounding the collecting groove 430; the filtering holes 420 are communicated with the filtering cavity 410. The partition plate 400 is inclined; the collecting groove 430 is arranged on the side where the included angle between the partition plate 400 and the inner wall of the separating cylinder 200 is acute. The separating cylinder 200 drives the disc 300 to rotate, and impurities slide downward along the surface of the disc 300 under the action of centrifugal force and separate from the disc 300, and gather at the groove. Due to the blocking of the partition plate 400, the impurities are gathered in the collecting groove 430. The filtering holes 420 on the plate body of the partition plate 400 filter the impurities, and the filtered liquid enters the filtering cavity 410 and flows from the filtering cavity 410 to the liquid outlet 210 to further filter and separate the liquid near the impurities, improving the solid-liquid separation effect.

[0037] Combined with the above embodiments, the working principle and process of the present invention are as follows: During use, the suspension is added into the separating cylinder 200 through the liquid inlet pipe 220 and the mounting cylinder 230. The motor 120 drives the rotating seat 121 to rotate through the pulley, and the rotating seat 121 drives the separating cylinder 200 to rotate. As Figure 6 shown, the separating cylinder 200 rotates counterclockwise. The separating cylinder 200 drives the disc 300 to rotate, and impurities slide downward along the surface of the disc 300 under the action of centrifugal force and separate from the disc 300, and gather at the groove. The clear liquid after separating the impurities flows upward along the disc 300 to the liquid outlet 210 and is discharged through the liquid outlet pipe 111. The annular wavy disc 300 promotes the rotation of the suspension in the gap between the discs 300, reduces the differential speed between the disc 300 and the suspension, reduces the hysteresis of the rotation of the suspension, and improves the rotation speed of the suspension. At the same time, the annular wavy disc 300 is conducive to the collection of impurity particles at the concave part of the wave of the disc 300, so as to facilitate the collection of impurity particles at the groove under the action of centrifugal force.

[0038] And due to the blocking of the partition plate 400, as Figure 6 shown, the separating cylinder 200 rotates counterclockwise, so that the impurities are gathered in the collecting groove 430. The filtering holes 420 on the plate body of the partition plate 400 filter the impurities, and the filtered liquid enters the filtering cavity 410 and flows from the filtering cavity 410 to the liquid outlet 210 to further filter and separate the liquid near the impurities, improving the solid-liquid separation effect.

[0039] Furthermore, in order to prevent impurities from flowing upward along the disc 300 with the water flow, the upper end of the vertical cross-section of the disc 300 is an arc shape extending upward and outward, so as to prevent impurities from moving upward along the disc 300 and prevent the impurities from flowing to the liquid outlet 210. At the same time, in order to reduce the resistance of impurities to gather at the groove, the lower end of the vertical cross-section of the disc 300 is an arc shape extending upward and outward, so as to guide the impurities to move towards the groove when the impurities move downward along the disc 300 to the lower end of the disc 300, reduce the resistance of the impurities moving from the disc 300 to the groove, and promote the separation of the impurities and the liquid.

[0040] When dealing with the impurities gathered at the groove, the auxiliary valve can be opened to drain the water pressure in the auxiliary chamber 251, and the retaining cylinder 250 moves downward away from the impurity outlet hole 240, so as to communicate the groove with the collection chamber through the impurity outlet hole 240. Part of the impurities are discharged into the collection chamber from the impurity outlet hole 240 under the action of centrifugal force and enter the collection box 130. After the impurity discharge is completed, the auxiliary valve is closed, and water is re-injected into the auxiliary chamber 251. Under the action of water pressure, the retaining cylinder 250 moves upward to abut against the upper groove wall of the limit groove 252 to re-seal the impurity outlet hole 240. In other embodiments, manual cleaning can also be selected after the machine is stopped.

[0041] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cutting fluid filtering device for a numerical control machine tool, characterized in that: It includes a housing, discs, and a filtration component; Inside the housing, there is a separation cylinder with a vertical axis; the separation cylinder is rotatably fitted inside the housing; on the inner side wall of the separation cylinder, there is an annular groove; the vertical cross-section of the groove is V-shaped with the small end away from the axis of the separation cylinder; at the upper end of the separation cylinder, there is a liquid outlet; a liquid inlet pipe is inserted into the liquid outlet and arranged vertically up and down; at the lower end of the liquid inlet pipe, there is an installation cylinder rotatably installed coaxially; the liquid inlet pipe and the installation cylinder are communicated; the lower end of the installation cylinder extends to the bottom of the separation cylinder; the upper end of the installation cylinder and the separation cylinder are fixedly connected by a connecting rod; There are multiple discs, distributed up and down; the discs are in the shape of a conical cylinder with the small end facing up; the horizontal cross-section of the discs is annular wavy; the discs are coaxially fixed on the side wall of the installation cylinder; there is a flow gap between the discs and the installation cylinder; at the upper end of the vertical cross-section of the discs, it is an arc-shaped extending upward and outward to prevent impurities from moving upward along the discs, and at the lower end, it is an arc-shaped extending upward and outward, so that when the impurities move downward along the discs to the lower end of the discs, the impurities are guided to move towards the groove; A collection chamber is formed between the separation cylinder and the housing; multiple impurity outlets are distributed on the side wall of the separation cylinder; the impurity outlets communicate the groove and the collection chamber; a blocking cylinder slides up and down on the inner wall of the separation cylinder; the upper end of the blocking cylinder blocks the impurity outlets; An auxiliary component is arranged between the blocking cylinder and the separation cylinder, and the auxiliary component is used to drive the blocking cylinder to move downward when impurities gather at the groove, so that the groove and the collection chamber are communicated; The filtration component is arranged on the side wall of the separation cylinder and is used to filter the impurity particles gathered at the groove; the filtration component includes multiple partition plates; the multiple partition plates are evenly distributed along the circumferential direction of the separation cylinder; The partition plates are arranged in the groove; The partition plates are arranged vertically and along the radial direction of the separation cylinder; the partition plates include two plate bodies distributed up and down; the upper plate body is fixed on the inner wall of the separation cylinder, and the lower plate body is fixed on the side wall of the blocking cylinder; at the upper end of the lower plate body, there is an insertion cylinder; the insertion cylinder slides up and down and is inserted into the lower end of the upper plate body; the partition plates are arranged obliquely, and a collection groove is arranged on the side where the included angle between the partition plate and the inner wall of the separation cylinder is acute; The inside of the plate body is hollow to form a filtration chamber; the filtration chambers in the two plate bodies are communicated through the insertion cylinder; the filtration chamber of the upper plate body is communicated with the liquid outlet through a channel built in the inner wall of the separation cylinder; a one-way valve is arranged in the channel; a collection groove is formed between the plate body and the inner wall of the separation cylinder; filtration holes are opened on the end surface of the plate body surrounding the collection groove; the filtration holes are communicated with the filtration chamber.

2. The cutting fluid filtering device for a numerical control machine tool according to claim 1, wherein: A plurality of flow holes are circumferentially distributed on the discs.

3. The cutting fluid filtering device for a numerical control machine tool according to claim 1, wherein: A support column is fixed at the upper end of the housing; the support column is coaxial with the separation cylinder; the upper end of the support column extends above the housing, and the lower end is rotatably fitted with the liquid outlet; a liquid outlet pipe is arranged in the support column; the liquid outlet pipe is communicated with the liquid outlet; an installation hole is arranged at the center of the support column; the liquid inlet pipe passes through the installation hole.

4. A cutting fluid filtering device for a numerically controlled machine tool according to claim 1, characterized in that: A collection box is arranged in the collection chamber; the collection box is annular; the collection box is sleeved outside the separation cylinder and fixed on the housing; the opening of the collection box faces upward; the height of the opening of the collection box is lower than the height of the impurity outlets.

5. A cutting fluid filtering device for a numerical control machine tool according to claim 1, characterized in that: A rotating seat is rotatably installed inside the housing; the rotating seat is fixedly connected with the separation cylinder; a frame is fixed on the housing; a motor is fixed on the frame; a belt pulley is connected between the output shaft of the motor and the rotating seat.

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