Centralized cutting fluid supply system

Abstract

The utility model relates to the technical field of machine tool machining liquid supply, in particular to a centralized cutting liquid supply system which comprises a refrigeration chamber, a main liquid box, a liquid return box, a liquid inlet pipeline and a liquid return pipeline. A heat dissipation device is arranged in the refrigeration chamber; the main liquid box is arranged in the refrigeration chamber and connected with a machine tool located in a machine tool workshop through a liquid inlet pipeline, and a filtering mechanism, a purifying mechanism and a refrigeration mechanism are arranged on the main liquid box; the liquid return box is located in the machine tool workshop, correspondingly connected with the machine tools and communicated with the main liquid box through a liquid return pipeline. According to the centralized cutting fluid supply system, heat sources in a machine tool workshop are reduced, and precise machining of parts in the machine tool workshop is guaranteed; the backflow cutting fluid is treated through the filtering mechanism, the purifying mechanism and the refrigerating mechanism which are arranged on the main fluid box, the workload of workers for maintaining the cutting fluid is reduced, the cleanliness of the cutting fluid is improved, the cutting fluid can be recycled to prolong the service life of the cutting fluid, and therefore waste liquid discharge is reduced, energy is saved, and emission is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to machine tool processing liquid supply technical field especially, relates to a cutting fluid centralized liquid supply system. BACKGROUND

[0002] In the machine tool processing process, cutting fluid plays a vital role, it can reduce cutting temperature, ensure that processing environment temperature is stable, reduce grinding wheel wear, improve machining precision and surface quality. The machine tool originally is single machine supply cutting fluid, and the heat of cutting fluid refrigerator is directly dissipated to the workshop, makes the workshop temperature rise, makes workshop temperature fluctuation increase, influences part precision machining, the original water tank is not fully filtered, and cutting fluid is very dirty, sometimes relevant failure occurs, cutting fluid service life reduces, and cutting fluid is wasted, and each water tank cutting fluid maintenance work (water adding, liquid supplement, cleaning) is more, and the efficiency is low. Therefore, it is necessary to design a cutting fluid centralized liquid supply system of vertical mill machine tool to solve the above problems. SUMMARY

[0003] The utility model provides a cutting fluid centralized liquid supply system to solve the heat of cutting fluid refrigerator in prior art is directly dissipated to the workshop, and the temperature fluctuation produced will influence part precision machining, and there is cutting fluid waste and low efficiency defect.

[0004] The utility model provides a cutting fluid centralized liquid supply system, it includes:

[0005] Refrigeration chamber, be equipped with heat dissipation device in,

[0006] Total liquid tank, be equipped with in refrigeration chamber, and be connected with machine tool in machine tool workshop through liquid inlet pipeline, be equipped with filter mechanism, purification mechanism and refrigeration mechanism on total liquid tank, be used in filter, purification and cooling to cutting fluid in circulation use cutting fluid in proper order,

[0007] A plurality of liquid return tank, be equipped with in machine tool workshop and with machine tool corresponding connection, each liquid return tank is communicated with total liquid tank through liquid return pipeline, to return flow cutting fluid.

[0008] According to the cutting fluid centralized liquid supply system provided by the utility model, the separation water tank is further equipped on the total liquid tank, the separation water tank is equipped between the filter mechanism and the liquid return pipeline, and is used for buffering and rough filtering of return flow.

[0009] According to the cutting fluid centralized liquid supply system provided by the utility model, the filter mechanism includes:

[0010] Filter paper frame, be equipped with on total liquid tank, and be equipped with filter paper in,

[0011] Labyrinth type sedimentation channel, be equipped with in total liquid tank interior.

[0012] According to the cutting fluid centralized supply system provided by the utility model, the purification mechanism comprises:

[0013] The oil-water separator is arranged downstream of the filtering mechanism.

[0014] The ozone sterilization device is arranged downstream of the oil-water separator.

[0015] According to the cutting fluid centralized supply system provided by the utility model, the total liquid tank comprises:

[0016] The first chamber is located below the filtering mechanism, and a plurality of partitions are arranged in the first chamber to form the labyrinth type sedimentation channel.

[0017] The second chamber is in communication with the first chamber, and the refrigeration mechanism is arranged in the second chamber.

[0018] The third chamber is in communication with the third chamber, and the third chamber is in communication with the liquid inlet pipeline through a pump.

[0019] According to the cutting fluid centralized supply system provided by the utility model, the cutting fluid centralized supply system further comprises:

[0020] The magnetic separator is arranged at the liquid inlet end of the liquid return tank.

[0021] According to the cutting fluid centralized supply system provided by the utility model, the cutting fluid centralized supply system further comprises:

[0022] The first liquid level sensor is arranged in the liquid return tank and is used for detecting the liquid level in the liquid return tank.

[0023] The liquid return pump is arranged at the liquid return end of the liquid return tank and can be opened or closed according to the liquid level in the liquid return tank.

[0024] According to the cutting fluid centralized supply system provided by the utility model, the cutting fluid centralized supply system further comprises:

[0025] The second liquid level sensor is arranged in the liquid return tank and is used for detecting whether the liquid return tank is in overflow.

[0026] According to the cutting fluid centralized supply system provided by the utility model, a valve and a first flow sensor are arranged on the liquid inlet pipeline.

[0027] According to the cutting fluid centralized supply system provided by the utility model, a second flow sensor is arranged on the liquid return pipeline.

[0028] The utility model provides a kind of cutting fluid centralized liquid supply system, it includes: refrigeration room, total liquid tank, back liquid tank, liquid inlet pipeline and back liquid pipeline.Refrigeration room is equipped with heat dissipation device;Total liquid tank is placed in refrigeration room, and is connected with machine tool located in machine tool workshop by liquid inlet pipeline, is equipped with filtering mechanism, purification mechanism and refrigeration mechanism on total liquid tank, in turn for to the backflow cutting fluid filtration, purification and cooling, to circulate use cutting fluid;Back liquid tank is located in machine tool workshop and is connected with machine tool correspondingly, each back liquid tank is communicated with total liquid tank by back liquid pipeline, to backflow cutting fluid.The utility model provides a kind of cutting fluid centralized liquid supply system, since total liquid tank is placed in refrigeration room, heat is discharged by heat dissipation device, to reduce the heat source in machine tool workshop, help to reduce machine tool workshop temperature fluctuation, guarantee machine tool workshop part precision machining;Backflow cutting fluid is handled by filtering mechanism, purification mechanism and refrigeration mechanism arranged on total liquid tank, reduce the workload of worker maintenance cutting fluid on one hand, improve the cleanliness of cutting fluid on the other hand, can circulate use cutting fluid to improve cutting fluid service life, to reduce waste liquid discharge, energy saving and emission reduction. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical scheme in the utility model or prior art, the following will be to the embodiment or prior art description needed to use a simple introduction to the drawings, obviously, the following description in the drawings is some embodiments of the utility model, for those skilled in the art, without creative labor, according to these drawings, other drawings can also be obtained.

[0030] Figure 1 It is the overall structure schematic diagram of the cutting fluid centralized liquid supply system provided in one embodiment of the utility model.

[0031] Figure 2 It is the top view of the cutting fluid centralized liquid supply system provided in one embodiment of the utility model.

[0032] Figure 3 It is the local structure schematic diagram of total liquid tank, back liquid tank, liquid inlet pipeline and back liquid pipeline provided in one embodiment of the utility model.

[0033] Figure 4 It is the structure schematic diagram of total liquid tank and device on it provided in one embodiment of the utility model.

[0034] Figure 5 It is the internal structure schematic diagram of total liquid tank provided in one embodiment of the utility model.

[0035] Figure 6 It is the structure schematic diagram of back liquid tank and device on it provided in one embodiment of the utility model.

[0036] Reference signs:

[0037] 1: refrigeration chamber; 2: total liquid tank; 201: first chamber; 202: second chamber; 203: third chamber; 3: return liquid tank; 4: liquid inlet pipeline; 5: liquid return pipeline; 6: machine tool workshop; 7: machine tool; 8: heat dissipation device; 9: partition water tank; 10: filter paper frame; 11: purification mechanism; 12: refrigeration mechanism; 13: cutting fluid pump; 14: labyrinth type sedimentation channel; 15: magnetic separator; 16: ball valve; 17: check valve; 18: first flow sensor; 19: second flow sensor; 20: gas pilot electromagnetic valve; 21: liquid return pump; 22: first liquid level sensor; 23: second liquid level sensor. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the present application will be described below in conjunction with the drawings in the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0039] In the description of the present embodiment, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present embodiment and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present embodiment.

[0040] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present embodiment, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0041] In this embodiment, unless otherwise explicitly specified and limited, the terms "arranged", "mounted", "connected", "linked", "fixed" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this embodiment can be understood according to the specific circumstances.

[0042] In the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature can be above or obliquely above the second feature, or it can only mean that the horizontal height of the first feature is higher than that of the second feature. The first feature can be below or obliquely below the second feature, or it can only mean that the horizontal height of the first feature is less than that of the second feature.

[0043] The following will be described in detail Figures 1-6 A cutting fluid centralized supply system is described. The cutting fluid centralized supply system comprises: a refrigeration chamber 1, a total liquid tank 2, a return liquid tank 3, a liquid inlet pipeline 4 and a liquid return pipeline 5.

[0044] Among them, the refrigeration chamber 1 is provided with a heat dissipation device 8; the total liquid tank 2 is arranged in the refrigeration chamber 1 and connected with the machine tool 7 located in the machine tool workshop 6 through the liquid inlet pipeline 4, and the total liquid tank 2 is provided with a filtering mechanism, a purification mechanism 11 and a refrigeration mechanism 12, which are used for filtering, purifying and cooling the return cutting fluid in sequence to recycle the cutting fluid; the return liquid tank 3 is located in the machine tool workshop 6 and connected with the machine tool 7 correspondingly, and each return liquid tank 3 is communicated with the total liquid tank 2 through the liquid return pipeline 5 to return the cutting fluid.

[0045] Specifically, the refrigeration chamber 1 is independent of the machine tool workshop 6, the total liquid tank 2 is arranged in the refrigeration chamber 1, and the heat of the return cutting fluid is discharged to the outside through the heat dissipation device 8, so as to avoid the influence of the heat of the cutting fluid on the machining effect of the machine tool 7 in the machine tool workshop 6. Preferably, the heat dissipation device 8 can adopt a fan or an air conditioner.

[0046] The total liquid tank 2 stores the cutting fluid, the cutting fluid in the return liquid tank 3 can be recycled, and the cutting fluid is filtered, purified and refrigerated in sequence through the filtering mechanism, the purification mechanism 11 and the refrigeration mechanism 12, so as to realize the recycling of the cutting fluid, and the recycling quality of the cutting fluid is improved through the above process. In addition, the total liquid tank 2 passes the cutting fluid into each machine tool 7 through the liquid inlet pipeline 4.

[0047] The liquid return tank 3 is used to recover the cutting fluid used by each machine tool 7, so as to return to the total liquid tank 2 through the liquid return pipeline 5, and the cutting fluid is treated to be recycled.

[0048] Since each machine tool 7 is provided with a corresponding liquid return tank 3, the cutting fluid in each liquid return tank 3 needs to be recovered and treated, therefore, the liquid inlet pipeline 4 comprises a liquid inlet main pipeline and a plurality of liquid inlet branch pipelines, one end of the liquid inlet main pipeline is connected with the total liquid tank 2, and the other end is connected to each machine tool 7 through each liquid inlet branch pipeline; the liquid return pipeline 5 comprises a liquid return main pipeline and a plurality of liquid return branch pipelines, each liquid return branch pipeline is connected with a corresponding liquid return tank 3, one end of the liquid return main pipeline is connected with each liquid return branch pipeline, and the other end is connected to the total liquid tank 2.

[0049] When the machine tool 7 does not use the cutting fluid, the cutting fluid in the main pipeline should be prevented from flowing into the machine tool 7 and the liquid return tank 3 behind the machine tool 7, a check valve 17 is installed on the liquid return branch pipeline, so as to ensure that the cutting fluid can only flow from the liquid return tank 3 to the liquid return main pipeline, and the backflow to the liquid return tank 3 is avoided; a gas pilot electromagnetic valve 20 is arranged on the liquid inlet branch pipeline, which is normally closed, and the cutting fluid will not flow into the machine tool 7 when the machine tool 7 does not use the cutting fluid. The ball valve 16 on the liquid inlet branch pipeline is normally open, and in special cases such as maintenance of the liquid return tank 3 or the pipeline, the ball valve 16 is closed, so that the cutting fluid will not flow into the machine tool 7 and the liquid return tank 3.

[0050] Preferably, the liquid inlet pipeline 4, i.e. the liquid inlet main pipeline and the plurality of liquid inlet branch pipelines, are wrapped with thermal insulation cotton to reduce the temperature change of the cutting fluid during transportation.

[0051] Through the above pipeline arrangement, only one total liquid tank 2 can be arranged, and the cutting fluid in the plurality of liquid return tanks 3 can be uniformly recovered and recycled, so as to form a centralized liquid supply system.

[0052] The machine tools 7 in the workshop will send a signal to the electric control cabinet of the total liquid tank 2 through a signal line, the electric control cabinet of the total liquid tank 2 adopts Omron PLC intelligent control, and the cutting fluid pump 13 is switched according to the feedback of the control requirements of the machine tools 7, i.e. one pump is opened for one to two machine tools 7, two pumps are opened for three to four machine tools 7, and three pumps are opened for five to six machine tools 7, so as to ensure that the flow of the cutting fluid used by the machine tools 7 is sufficient.

[0053] The utility model provides a kind of cutting fluid centralized liquid supply system, it includes: refrigeration room 1, total liquid tank 2, back liquid tank 3, liquid inlet pipeline 4 and back liquid pipeline 5.Refrigeration room 1 is equipped with heat dissipation device 8;Total liquid tank 2 is located refrigeration room 1, and is connected with machine tool 7 located in machine tool workshop 6 by liquid inlet pipeline 4, and is equipped with filtering mechanism, purification mechanism 11 and refrigeration mechanism 12 on total liquid tank 2, in turn for to the backflow cutting fluid filtration, purification and cooling, to circulate cutting fluid;Back liquid tank 3 is located in machine tool workshop 6 and is connected with machine tool 7 correspondingly, each back liquid tank 3 is communicated with total liquid tank 2 by back liquid pipeline 5, to backflow cutting fluid.The utility model provides a kind of cutting fluid centralized liquid supply system, since total liquid tank 2 is placed in refrigeration room 1, heat is discharged by heat dissipation device 8, to reduce the heat source in machine tool workshop 6, it helps to reduce machine tool workshop 6 temperature fluctuation, guarantees machine tool workshop 6 precision machining;By the filtering mechanism, purification mechanism 11 and refrigeration mechanism 12 arranged on total liquid tank 2, backflow cutting fluid is handled, on the one hand, reduce the workload of worker maintenance cutting fluid, on the other hand, improve the cleanliness of cutting fluid, can circulate cutting fluid to improve the service life of cutting fluid, to reduce waste liquid discharge, energy saving and emission reduction.

[0054] In one embodiment of the utility model, separation water tank 9 is also provided on total liquid tank 2, separation water tank 9 is located between filtering mechanism and back liquid pipeline 5, and is used for buffering and rough filtering backflow.In this embodiment, by setting separation water tank 9 on the backflow end of total liquid tank 2 (i.e. the port of back liquid pipeline 5), the backflow cutting fluid is first buffered and rough filtered by separation water tank 9.It can be understood that separation water tank 9 is a kind of water tank design that realizes multiple functions by physical separation, in this embodiment, it is divided into two independent areas with total liquid tank 2, and the backflow cutting fluid is first buffered and rough filtered by separation water tank 9, and then enters filtering mechanism.

[0055] In one embodiment of the utility model, filtering mechanism includes: filter paper frame 10 and labyrinth type sedimentation channel 14.Wherein, filter paper frame 10 is located on total liquid tank 2, and is equipped with filter paper inside;Labyrinth type sedimentation channel 14 is located inside total liquid tank 2.Specifically, filter paper frame 10 is located downstream of separation water tank 9, and filter paper is placed inside, for further filtering cutting fluid, and can filter and separate iron mud in cutting fluid;Then, cutting fluid is deposited by passing through labyrinth type sedimentation channel 14 in total liquid tank 2, and further separates part of iron mud;Then, pass into purification mechanism 11.

[0056] In one of the embodiments of the utility model, the purification mechanism 11 includes: oil-water separator and ozone sterilization device. Among them, the oil-water separator is arranged at the downstream of the filtering mechanism, and the ozone sterilization device is arranged at the downstream of the oil-water separator. Specifically, the oil-water separator and the ozone sterilization device are used to separate oil and water and sterilize ozone for the cutting fluid, so that the cutting fluid is purified and treated, and the quality of the circulating cutting fluid is improved. Then, the cutting fluid is cooled by the refrigeration mechanism 12, and finally, the cutting fluid is pumped into the machine tool 7 for use.

[0057] In one of the embodiments of the utility model, the refrigeration mechanism 12 adopts a refrigerator to ensure that the temperature of the cutting fluid is constant. The purified and cooled cutting fluid is pumped into the liquid inlet pipeline 4 for the machine tool 7 to use again. The liquid inlet pipeline 4 is wrapped with thermal insulation cotton to reduce the temperature change of the cutting fluid during transportation. The main liquid tank in the refrigeration chamber is also wrapped with thermal insulation cotton to reduce the loss of refrigeration capacity of the cutting fluid.

[0058] In one of the embodiments of the utility model, the total liquid tank 2 includes: a first chamber 201, a second chamber 202 and a third chamber 203. Among them, the first chamber 201 is located below the filtering mechanism, and a plurality of partitions are arranged in the first chamber 201 to form a labyrinth type sedimentation channel 14; the second chamber 202 is communicated with the first chamber 201, and the refrigeration mechanism 12 is arranged in the second chamber 202; the third chamber 203 is communicated with the third chamber 203, and the third chamber 203 is communicated with the liquid inlet pipeline 4 through a pump. Specifically, the total liquid tank 2 is divided into a plurality of chambers according to the functional areas, the first chamber 201 is used for placing a plurality of partitions, the labyrinth type sedimentation channel 14 is constructed by the partitions, the second chamber 202 is used for installing a refrigerator to reduce the temperature of the cutting fluid, and the third chamber 203 is a storage chamber for storing the treated cutting fluid, which can output the cutting fluid through valves and pumps.

[0059] In addition, the purification mechanism 11 is placed beside the total liquid tank 2, which integrates an oil-water separator and an ozone sterilization device. The purification mechanism 11 can be connected between the first chamber 201 and the second chamber 202 through the fourth chamber, and is used for treating the cutting fluid that needs to be separated and sterilized.

[0060] In one of the embodiments of the utility model, the cutting fluid centralized liquid supply system further includes: a magnetic separator 15 arranged at the liquid inlet end of the liquid return tank 3. In this embodiment, the return cutting fluid collected by the liquid return tank 3 is first separated from the iron mud in part of the cutting fluid by the magnetic separator 15, which is suitable for grinding machining; the milling machining and turning machining are replaced by the drum chip removal machine, the scraper chip removal machine and the like. The liquid return tank 3 is divided into three grids, and the cutting fluid after the magnetic separation is discharged to the liquid return tank 3 and is simply separated from the iron mud.

[0061] In one of the embodiments of the utility model, the cutting fluid centralized supply system further comprises: a first liquid level sensor 22 and a liquid return pump 21. Among them, the first liquid level sensor 22 is arranged in the liquid return tank 3 and is used to detect the liquid level in the liquid return tank 3; the liquid return pump 21 is arranged at the liquid return end of the liquid return tank 3 and can be opened or closed according to the liquid level in the liquid return tank 3. Specifically, the liquid return pump 21 can be opened by PLC control when the first liquid level sensor 22 detects that the liquid level rises to the specified height, and the cutting fluid in the liquid return tank 3 is returned to the total liquid tank 2 through the return pipeline. The first liquid level sensor 22 detects that the liquid level drops to the set height, and controls the liquid return pump 21 to be closed; thereby, the amount of cutting fluid in the liquid return tank 3 is maintained within the set range.

[0062] In one of the embodiments of the utility model, the cutting fluid centralized supply system further comprises: a second liquid level sensor 23 arranged in the liquid return tank 3 and used to detect whether there is overflow in the liquid return tank 3. The second liquid level sensor 23 detects whether the liquid return tank 3 is full, and if it is full, an alarm stops, the gas pilot electromagnetic valve 20 is closed, the cutting fluid stops entering the machine tool, so that the cutting fluid stops entering the liquid return tank 3, and the liquid return pump 21 starts for 50 seconds to pump away the cutting fluid, avoiding overflow of the cutting fluid from the liquid return tank 3.

[0063] In one of the embodiments of the utility model, a valve and a first flow sensor 18 are arranged on the liquid inlet pipeline 4. Preferably, the valve adopts a ball valve 16, and the ball valve 16 is in a normally open state and is closed only in an abnormal maintenance state; after the machine tool starts cutting fluid spraying, the gas pilot electromagnetic valve 20 on the corresponding liquid inlet branch of the machine tool is opened, and the cutting fluid enters the machine tool through the liquid inlet branch; the first flow sensor 18 is a liquid inlet flow sensor and is used to monitor whether the flow is normal; when the flow is abnormal, the machine tool 7 will alarm and stop, avoiding dry cutting damage to the processed parts.

[0064] In one of the embodiments of the utility model, a second flow sensor 19 is arranged on the liquid return pipeline 5. Specifically, the second flow sensor 19 is a liquid return flow sensor. In this embodiment, the second flow sensor 19 is arranged on the liquid return pipeline 5 and is used to detect whether the cutting fluid is normally pumped back to the total liquid tank 2 after the liquid return pump 21 starts; after the liquid return pump 21 is opened, if no return flow is detected in the liquid return pipeline 5, an alarm is also triggered, which also avoids that the cutting fluid in the liquid return tank 3 overflows in the case of unexpected situation, and cooperates with the second liquid level sensor 23 to realize double insurance.

[0065] Finally, it should be noted that: the above examples are used to illustrate the technical solutions of the present application, but not limited to; although the present application is described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still be modified to the technical solutions recorded in the foregoing examples, or part of the technical features are replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A cutting fluid centralized supply system characterized by, The utility model relates to a cutting fluid recycling system, comprising: a refrigeration chamber (1) provided with a heat dissipation device (8); a total liquid tank (2) provided in the refrigeration chamber (1) and connected with a machine tool (7) in a machine tool workshop (6) through a liquid inlet pipeline (4), the total liquid tank (2) being provided with a filtering mechanism, a purifying mechanism (11) and a refrigeration mechanism (12) in sequence for filtering, purifying and cooling the backflow cutting fluid to recycle the cutting fluid; a plurality of backflow liquid tanks (3) corresponding to the machine tool (7) in the machine tool workshop (6) and connected with the total liquid tank (2) through a backflow liquid pipeline (5) to backflow the cutting fluid.

2. The cutting fluid centralized supply system according to claim 1, wherein The total liquid tank (2) is further provided with a separation water tank (9) between the filtering mechanism and the backflow liquid pipeline (5) for slow flow and rough filtering of the backflow.

3. The cutting fluid centralized supply system according to claim 1, wherein The filtering mechanism comprises: a filter paper frame (10) provided on the total liquid tank (2) and internally provided with filter paper; a labyrinth type sedimentation channel (14) provided in the total liquid tank (2).

4. The cutting fluid centralized supply system according to claim 1, wherein The purifying mechanism (11) comprises: an oil-water separator provided downstream of the filtering mechanism; an ozone sterilization device provided downstream of the oil-water separator.

5. The cutting fluid centralized supply system according to claim 3, wherein The total liquid tank (2) comprises: a first chamber (201) located below the filtering mechanism, a plurality of partitions being provided in the first chamber (201) to form the labyrinth type sedimentation channel (14); a second chamber (202) in communication with the first chamber (201), the refrigeration mechanism (12) being provided in the second chamber (202); a third chamber (203) in communication with the third chamber (203), the third chamber (203) being in communication with the liquid inlet pipeline (4) through a pump.

6. The cutting fluid centralized supply system according to claim 1, wherein Further comprising: a magnetic separator (15) provided at the liquid inlet end of the backflow liquid tank (3).

7. The cutting fluid centralized supply system of claim 1, wherein Further comprising: a first liquid level sensor (22) provided in the backflow liquid tank (3) for detecting the liquid level in the backflow liquid tank (3); a backflow pump (21) provided at the backflow end of the backflow liquid tank (3) and capable of being turned on or off according to the liquid level in the backflow liquid tank (3).

8. The cutting fluid centralized supply system of claim 1, wherein Further comprising: a second liquid level sensor (23) provided in the backflow liquid tank (3) for detecting whether there is overflow in the backflow liquid tank (3).

9. The cutting fluid centralized supply system according to any one of claims 1 to 8, characterized in that, A valve and a first flow sensor (18) are provided on the liquid inlet pipeline (4).

10. The cutting fluid centralized supply system according to any one of claims 1 to 8, characterized by, A second flow sensor (19) is provided on the backflow liquid pipeline (5).

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