CN110877936B - Cutting fluid purifying and filtering device - Google Patents

Abstract

The invention provides a cutting fluid purifying and filtering device, which comprises an adsorption device; a pre-filter device; an oil-water separation device; the three-stage filtering device is connected with the oil-water separation device; the adsorption device includes: the water pumping pipe is closed at one end, and a water pumping hole is formed in the water pumping pipe; the moving component is sleeved on the water suction pipe in a sliding mode along the water suction pipe, a gap is formed between the moving component and the water suction pipe in the radial direction, and a suction inlet is formed in the lower portion of the gap; the telescopic sleeve is provided with a bottom surface fixed with one closed end of the water suction pipe, a side surface capable of stretching along the axial direction of the water suction pipe and a top surface connected with the moving member, at least the side surface of the telescopic sleeve is configured to be capable of allowing liquid to pass through, and when the side surface stretches along the axial direction of the water suction pipe, the top surface drives the moving member to move along the axial direction of the water suction pipe.

Description

A cutting fluid purification filter device

technical field

The invention relates to a cutting fluid purification and filtering device, which is used for recovering slick oil, purifying and recycling the cutting fluid.

Background technique

Modern metal processing is inseparable from the cooling and lubrication of cutting fluid, but cutting fluid is easily polluted by guide rail oil and particles, which will damage the machining accuracy of the workpiece to a certain extent, reduce the yield, and cause serious tool loss. Moreover, cutting fluid Deterioration can even cause expensive pollution treatment costs. During the use of the cutting fluid, a thick oil slick is formed due to the infiltration of rail oil and grease, etc., and a large amount of powder and particulate impurities are produced during the cutting process, which may breed a large number of harmful bacteria such as anaerobic bacteria, making the cutting fluid Odor, deterioration, replacement and disposal of waste cutting fluid brings a lot of inconvenience to production, endangers the health of workers, increases the production cost of enterprises and so on.

The cutting fluid filtering equipment in the prior art has the following disadvantages: the cutting fluid filtering equipment in the prior art has the disadvantages of large size, incomplete filtration, and low degree of oil-water separation; the cutting fluid filtering equipment in the prior art, pumping When the suction pipe extends into the bottom of the container to draw liquid, it may suck a large amount of iron chips, which is not conducive to the subsequent separation, and even damages the filter device; The filtration efficiency of the filter unit is reduced.

Contents of the invention

The object of the present invention is to overcome the above-mentioned deficiencies in the prior art, and provide a cutting fluid purification and filtration device with reasonable structural design.

The technical solution adopted by the embodiments of the present invention to solve the above problems is: a cutting fluid purification and filtering device, which is characterized in that it includes:

Adsorption device;

A pre-filter device, the pre-filter device is connected to the adsorption device;

An oil-water separation device, the oil-water separation device is connected to the pre-filter device; and

A three-stage filter device, the three-stage filter device is connected to the oil-water separation device;

The adsorption device includes:

A water suction pipe, one end of the water suction pipe is closed, and a water suction hole is arranged on the water suction pipe;

a moving member, which can be slidably sleeved on the water suction pipe along the water suction pipe, and has a gap between the moving member and the water suction pipe in the radial direction, and the lower part of the gap forms a suction port; and

A telescopic sleeve, which has a bottom surface fixed to the closed end of the suction pipe, a side surface that can expand and contract along the axial direction of the suction pipe, and a top surface connected to the moving member, at least the side surface of the telescopic sleeve It is configured to allow liquid to pass through, and when the side faces expand and contract along the axial direction of the water suction pipe, the top surface drives the moving member to move along the axial direction of the water suction pipe.

Embodiments of the present invention wherein the sides are configured to expand upon absorption of liquid, thereby causing the sides to expand and contract along the suction tube.

The cross-sectional shape of the side in the embodiment of the present invention is configured as a wave shape or a broken line shape.

The moving member in the embodiment of the present invention has a buoyancy structure to increase the buoyancy of the moving member.

The buoyancy structure in the embodiment of the present invention is a groove provided on the upper surface of the moving member.

The buoyancy structure in the embodiment of the present invention is a closed inner cavity arranged on the upper part of the moving member.

The moving member in the embodiment of the present invention has an annular installation groove, and the inner edge of the top surface of the telescopic sleeve is snapped into the installation groove to be fixed.

The position of the suction port in the embodiment of the present invention is lower than the position of the suction hole.

The telescopic sleeve described in the embodiment of the present invention is made of rubber.

The embodiment of the present invention also includes a mounting plate, the mounting plate is fixed to the end of the water suction pipe, so as to close one end of the water suction pipe, and the bottom surface of the telescopic sleeve is fixed to the mounting plate.

The oil-water separation device described in the embodiment of the present invention comprises:

Separation cylinder, it has accommodating cavity; And

a liquid inlet pipe, which communicates with the separation cylinder and is configured to feed liquid into the separation cylinder;

A first warehouse and a second warehouse are arranged on the upper part of the separation cylinder, the first warehouse communicates with the accommodation chamber through an oil overflow port, the first warehouse is provided with an oil collecting port, and the accommodation chamber The liquid in the cavity flows into the first chamber through the oil overflow port, and recovers the inflow liquid from the oil collecting port;

A pipe part is arranged in the second warehouse, the lower end of the pipe part extends into the separation cylinder, and its upper end communicates with the second warehouse, and an outlet part is arranged at the upper end of the pipe part. The upper end of the outlet part has a water outlet, and the height of the water outlet is lower than the oil overflow port.

The outlet part in the embodiment of the present invention includes a connecting part and an adjusting unit, and the adjusting unit is arranged on the connecting part so as to be adjustable up and down along the axial direction of the pipe part, so as to adjust the height of the water outlet.

In the embodiment of the present invention, the adjustment unit is screwed to the connection part, and the connection part is fixed on the upper end of the pipe part.

The adjustment unit in the embodiment of the present invention is provided with a gripping portion.

The upper part of the accommodating chamber in the embodiment of the present invention has an opening, the position of the opening matches the height of the first compartment and the second compartment, and a first cover plate is arranged at the opening , the first cover plate has a buffer plate, the buffer plate is inclined in the direction away from the liquid inlet pipe during the downward process, and the buffer plate divides the opening into a first part and a second part , the liquid inlet pipe corresponds to the first part, and the second part corresponds to the oil overflow port.

An emptying pipe is provided at the bottom of the separating drum in the embodiment of the present invention.

In the embodiment of the present invention, the lower end of the pipe part extends at least beyond the middle position in the height direction of the separation cylinder.

The bottom of the oil spill port in the embodiment of the present invention is straight, and the width of the oil spill port is at least one-third of the diameter of the separating cylinder.

The second chamber in the embodiment of the present invention has a return opening, and the position of the return opening is lower than the water outlet.

Compared with the prior art, the present invention has the following advantages and effects: the structure is simple and the design is reasonable; the cutting fluid is transported through the adsorption device in the most direct, simple and scientific way, thereby separating floating oil and impurities more efficiently There is a pre-filter device before the liquid inlet, which performs primary impurity filtration before the liquid inlet system, and the pre-filter device is detachable and washable, and does not need to be replaced after repeated use; after the cutting fluid enters the separation cylinder, the oil layer floats due to gravity , The oil-water separation is completed by the oil-water separation device, and the floating oil is discharged from the oil overflow port. After the oil-water separation, the cutting fluid enters the three-stage filter device. After layer-by-layer filtration, the reuse is cleaner and the filtration efficiency is high.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is a schematic diagram of a three-dimensional structure of a cutting fluid purification and filtering device in an embodiment of the present invention.

Fig. 2 is a schematic diagram 2 of the three-dimensional structure of the cutting fluid purification and filtering device in the embodiment of the present invention without the cover.

Fig. 3 is a three-dimensional structural schematic diagram of the cutting fluid purification and filtering device in the embodiment of the present invention.

Fig. 4 is a three-dimensional structural schematic diagram 1 of the cutting fluid purification and filtering device in the embodiment of the present invention without the casing.

Fig. 5 is a schematic diagram 2 of the three-dimensional structure of the cutting fluid purification and filtering device in the embodiment of the present invention without the casing.

Fig. 6 is a schematic perspective view of the three-dimensional structure of the adsorption device in the embodiment of the present invention.

Fig. 7 is a three-dimensional structural schematic diagram of the adsorption device in the embodiment of the present invention without the telescopic sleeve and the moving member.

Fig. 8 is a partial cross-sectional structural schematic diagram of the adsorption device in the embodiment of the present invention.

Fig. 9 is a partial cross-sectional structural schematic diagram of an adsorption device in some embodiments.

Fig. 10 is a partial cross-sectional structural schematic diagram of an adsorption device in some embodiments.

Fig. 11 is a three-dimensional structural schematic diagram of the oil-water separation device in the embodiment of the present invention.

Fig. 12 is the second schematic diagram of the three-dimensional structure of the oil-water separation device in the embodiment of the present invention.

Fig. 13 is a schematic cross-sectional structure diagram of an oil-water separation device in an embodiment of the present invention.

Fig. 14 is a first perspective view of the structure of the first cover.

Fig. 15 is a second perspective view of the structure of the first cover.

Fig. 16 is a structural block diagram of the cutting fluid purification and filtering device in the embodiment of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are explanations of the present invention and the present invention is not limited to the following examples.

Example 1.

Referring to FIG. 1 to FIG. 16 , the cutting fluid purification and filtering device of this embodiment includes an adsorption device 1 , a pre-filter device 3 , an oil-water separation device 2 , a three-stage filter device 4 and a housing 5 .

In this embodiment, the pre-filter device 3 is connected to the adsorption device 1; the oil-water separation device 2 is connected to the pre-filter device 3; the three-stage filter device 4 is connected to the three-stage filter device 4. The above-mentioned oil-water separation device 2 is connected. The above connections are specifically connected by pipelines, which will not be repeated here.

In this embodiment, a vacuum pump 6 is set, and the vacuum pump 6 is arranged on the pipeline between the adsorption device 1 and the pre-filter device 3. The vacuum pump 6 provides power to the adsorption device 1, so that the adsorption device 1 can perform suction. liquid, and transport the liquid to the next pass (such as pre-filter device 3).

In this embodiment, a booster pump 7 is provided, and the booster pump 7 is arranged on the pipeline between the oil-water separation device 2 and the three-stage filter device 4 . The booster pump 7 can deliver the liquid to the three-stage filter device 4 .

The above-mentioned vacuum pump 6 and booster pump 7 are all prior art, and will not be repeated here.

In this embodiment, the pre-filter device 3 , the oil-water separation device 2 and the three-stage filter device 4 can all be arranged in the housing.

The pre-filtering device 3 in this embodiment can use a filter screen or filter paper for filtering, and details are not repeated here. The pre-filter device 3 can perform primary impurity filtration, and the filter screen or filter paper is detachable and washable, and does not need to be replaced for repeated use.

The three-stage filtering device 4 in this embodiment has triple filtering functions. After oil-water separation, disinfection and sterilization, the cutting fluid enters the three-stage filter device for filtration. The filtration accuracy is 5-10 microns, which can directly meet the use requirements, and the reuse is cleaner. The cleanliness and effect are higher than similar products. The tertiary filtering device 4 itself is a prior art, and it can have triple filtering, such as setting three groups of filtering units with different filtering precisions. The filtration accuracy of the three groups of filter units increases sequentially. Specifically, the three-stage filter device 4 is composed of three stages of filter elements of different specifications. The mesh numbers of the filter elements are different in the three-stage filtration, which are stainless steel filter elements of 50 microns, wire filter elements of 1600 mesh, and pp cotton filter elements of 2000-3000 mesh. The filter elements range from coarse to Fine, layer-by-layer filtration, low filtration resistance, large filtration flow, large dirt holding capacity, and long service life. The fiber diameter and gap of this product can be adjusted during the production process. The inner layer of the filter core is small and the outer layer is large. The dirt holding capacity is high, the filter element is not easy to block, and the service life is extended.

The adsorption device 1 of this embodiment includes a water suction pipe 11 , a moving member 12 , a telescopic sleeve 13 and a mounting plate 14 .

One end of the water suction pipe 11 in this embodiment is closed, and the water suction pipe 11 is provided with a water suction hole 111. During operation, a negative pressure is generated in the water suction pipe 11, thereby sucking liquid from the water suction hole 111. In this embodiment, the vacuum pump 6 can be used to realize the negative pressure in the suction pipe 11 .

The moving member 12 in this embodiment can be slidably sleeved on the drawing pipe 11 along the drawing pipe 11, and there is a gap between the moving member 12 and the drawing pipe 11 in the radial direction, and the gap The lower part forms the suction port 121. In this embodiment, the liquid is sucked into the gap through the suction port 121 , and enters the water suction hole 111 .

The telescopic sleeve 13 in this embodiment has a bottom surface 131 fixed to one end of the suction pipe 11 that is closed, a side 132 that can expand and contract along the axial direction of the suction pipe 11, and a side surface 132 that is connected to the moving member 12. At least the side surface 132 of the telescopic sleeve 13 is configured to allow liquid to pass through. When the side surface 132 expands and contracts in the axial direction of the suction pipe 11, the top surface 133 drives the moving member 12 along the The axial movement of the suction pipe 11, therefore, the position of the suction port 121 can be adjusted to suit the actual liquid level.

The adsorption device 1 in this embodiment is simple in structure and reasonable in design; through the setting of the telescopic sleeve 13, the position of the moving member 12 can be adjusted, so that the suction port 121 is adapted to the specific liquid level; when the adsorption device needs to recover the cutting fluid , a part of the telescopic sleeve 13 is immersed in the liquid surface, and after the liquid enters the telescopic sleeve 13, the position of the moving member 12 is adjusted through the telescopic sleeve 13, so that the suction port corresponds to the upper layer of the liquid surface, thereby extracting the oil on the upper layer of the liquid surface ( The density of the oil is lower than that of water, so the oil will be located in the upper layer), and the liquid in the upper layer will continue to enter the inside of the telescopic sleeve 13 during the pumping process.

The side surface 132 in this embodiment is configured to expand after absorbing liquid, so that the side surface 132 expands and contracts along the suction pipe 11 . Specifically, the side surface 132 absorbs liquid (water or oil), which expands due to its material relationship, so that the overall height of the side surface 132 increases, and drives the top surface 133 to rise. When the top surface 133 rises, it drives the moving member 12 to rise, thereby The position adjustment of the suction port 121 is completed. That is to say, when the telescopic sleeve 13 is immersed in the liquid too much, the position of the suction port 121 will become higher, so as to prevent excessive suction of water located in a relatively lower layer.

The cross-sectional shape of the side surface 132 in this embodiment is configured as a wave shape or a broken line shape, so that the side surface 132 has enough expansion and contraction range in the axial direction of the suction pipe 11 , thereby increasing the adjustment range of the position of the suction port 121 .

The telescopic sleeve 13 in this embodiment is made of rubber in the prior art. The rubber material can expand after absorbing water, so that the telescopic sleeve 13 can expand and contract. In addition, when the telescopic sleeve 13 is made of this material, it also functions as a filter. Specifically, the telescopic sleeve 13 can absorb part of the water to prevent excessive water from entering the interior and being extracted, and the telescopic sleeve 13 itself can also prevent iron cutting, etc. Impurities get inside it. In some embodiments, the telescopic sleeve 13 can also use water-absorbing resin or other materials in the prior art, which can realize the functions of water absorption and liquid penetration.

The moving member 12 in this embodiment has a buoyancy structure to increase the buoyancy of the moving member 12 . If the buoyancy on the moving member 12 is not enough, the upper part of the gap between the moving member 12 and the water suction pipe 11 may enter a large amount of water because the moving member 12 is completely submerged. The setting of the buoyancy structure is just to increase the buoyancy of the moving member 12 and prevent it from being completely submerged.

As shown in FIG. 5 , in some embodiments, the buoyancy structure is a groove 122 disposed on the upper surface of the moving member 12 .

As shown in FIG. 4 , in some embodiments, the buoyancy structure is a closed inner chamber 123 disposed on the upper part of the moving member 12 .

In this embodiment, the moving member 12 has an annular installation groove 124 , and the inner edge of the top surface 133 of the telescopic sleeve 13 is snapped into the installation groove 124 to be fixed. If the telescopic sleeve 13 is made of soft material such as rubber, the detachable connection can be realized through the above structure.

The position of the suction port 121 in this embodiment is lower than the position of the suction hole 111 . By utilizing the position-adjustable feature of the suction port 121, the oil in the upper layer can be dynamically adjusted and absorbed.

The installation plate 14 in this embodiment is fixed on the end of the water suction pipe 11 , so as to close one end of the water suction pipe 11 , and the bottom surface 131 of the telescopic sleeve 13 is fixed on the installation plate 14 . Specifically, the bottom surface 131 can be fixed to the mounting plate 14 by bolts.

In this embodiment, a fixing unit 15 can also be provided for fixing the suction pipe 11 . Specifically, one end of the fixing unit 15 is fixed on the suction pipe 11, and the other end can be fixed to various table tops, container surfaces, etc., so that the adsorption device is in a proper position.

The oil-water separation device 2 in this embodiment includes a separation cylinder 21 and a liquid inlet pipe 22 .

The separation cylinder 21 in this embodiment has a housing chamber 211 for liquid storage or liquid intake, the bottom of the housing chamber 211 is closed, and the upper part is at least partially open.

The liquid inlet pipe 22 in this embodiment communicates with the separation cylinder 21 and is configured to feed liquid into the separation cylinder 21 . When in use, the waste liquid is transported from the liquid inlet pipe 22 into the accommodating cavity 211 .

A first warehouse 211 and a second warehouse 212 are arranged on the upper part of the separating drum 21 in this embodiment, the first warehouse 211 communicates with the accommodating cavity 211 through an oil overflow port 213, and the first warehouse 211 An oil collecting port 2111 is provided, the liquid in the accommodating chamber 211 flows into the first chamber 211 through the oil overflow port 213, and the liquid flowing in is recovered from the oil collecting port 2111.

A pipe portion 2121 is arranged in the second warehouse 212 in this embodiment, the lower end of the pipe portion 2121 extends into the separation cylinder 21, and its upper end communicates with the second warehouse 212, the pipe portion 2121 An outlet portion 2122 is provided at the upper end of the outlet portion 2122, and a water outlet 2123 is provided at the upper end of the outlet portion 2122, and the height of the water outlet 2123 is lower than that of the oil overflow port 213. In one embodiment, the height of the water outlet 2123 is slightly lower than that of the oil spill port 213 , for example, the height of the water outlet 2123 is 3-8 mm lower than the height of the oil spill port 213 . In one embodiment, the height of the water outlet 2123 is equal to or slightly higher than that of the oil overflow port 213 , for example, the height of the water outlet 2123 is 0-5 mm higher than the height of the oil overflow port 213 . After the liquid inlet pipe 22 enters the liquid, the liquid level in the accommodating chamber 211 rises, so that the oil floating on the water surface enters the first chamber 211 through the oil overflow port 213 . The height relationship between the water outlet 2123 and the oil overflow port 213 can control the height of the liquid level, thereby controlling the thickness of the oil layer. If the liquid level in the accommodating chamber 211 is too high, because the oil layer is too thin, the oil overflow port 213 will flow out to the first storehouse 211, and when the liquid level in the accommodating chamber 211 is too low, the oil layer will be too thick. , The oil spill port 213 needs to accumulate oil for a long time or does not produce oil.

This embodiment is simple in structure and reasonable in design; when in use, clean water is injected into the accommodating cavity 211, whose liquid level is slightly lower than the oil overflow port 213, and then the waste liquid is injected into the accommodating cavity 211 through the liquid inlet pipe 22, and the waste liquid The oil in the liquid floats on the water surface because its density is lower than that of water, and flows into the first warehouse 211 through the oil overflow port 213, and is recovered or collected from the oil collection port 2111 of the first warehouse 211; The device has the advantages of high separation efficiency, low cost, small volume and simple operation.

The outlet part 2122 in this embodiment includes a connecting part 2124 and an adjusting unit 2125. The adjusting unit 2125 is arranged on the connecting part 2124 and can be adjusted up and down along the axial direction of the tube part 2121 to adjust the The height of the water outlet 2123. By adjusting the height of the water outlet 2123 through the adjustment unit 2125 , the liquid level in the accommodating chamber 211 can be controlled, so that the oil layer flows into the first chamber 211 from the oil overflow port 213 more reasonably.

In this embodiment, the adjusting unit 2125 is screwed to the connecting portion 2124 , and the connecting portion 2124 is fixed on the upper end of the tube portion 2121 . When the adjustment unit 2125 rotates relative to the connecting portion 2124, the position of the adjustment unit 2125 changes, so that the height of the water outlet 2123 can be adjusted, and the operation is very convenient. In other embodiments, the adjustment unit 2125 can also adopt other structures in the prior art to realize the height-adjustable connection between the adjustment unit 2125 and the connection part 2124 , such as socket.

In this embodiment, the adjustment unit 2125 is provided with a handle portion 2126 . Therefore, it is convenient to rotate the adjustment unit 2125 .

The upper part of the accommodating chamber 211 in this embodiment has an opening, the position of the opening matches the height position of the first warehouse 211 and the second warehouse 212, and a first Cover plate 2128, the first cover plate 2128 has a buffer plate 2129, the buffer plate 2129 is inclined in the direction away from the liquid inlet pipe 22 during the downward process, and the buffer plate 2129 closes the opening Divided into a first part and a second part, the liquid inlet pipe 22 corresponds to the first part, and the second part corresponds to the oil overflow port 213 . The setting of the buffer plate 2129 has a certain buffer function for the cutting fluid entering the accommodating chamber 211 from the liquid inlet pipe 22, and forms a small cavity, which is conducive to the concentration of floating oil. The setting of cover plate 2128 can prevent splashing.

An emptying pipe 214 is provided at the bottom of the separation cylinder 21 in this embodiment. So that the cutting fluid in the accommodating cavity 211 can be emptied in time after the equipment stops running.

In this embodiment, the lower end of the tube portion 2121 extends at least beyond the middle position in the height direction of the separation cylinder 21 . In order to prevent the oil in the upper layer from entering the pipe portion 2121 and being discharged from the second chamber 212 .

The bottom of the oil overflow port 213 in this embodiment is flat, and the width of the oil overflow port 213 is at least one-third of the diameter of the separating cylinder 21 . Therefore, the oil layer can pass through the oil spill port 213 quickly.

The second chamber 212 in this embodiment has a return opening 2120 , and the position of the return opening 2120 is lower than the water outlet 2123 . After the water flows into the second chamber 212 , it is discharged from the return port 2120 .

The casing 5 in this embodiment has a cover body 51 , and the cover body 51 is installed on the casing 5 in an openable manner. For example, the cover body 51 may be hingedly fixed on the housing 5 , or directly detachably fixed on the housing 5 . The positions of the cover body 51 correspond to the first compartment 211 and a second compartment 212 respectively. When the cover body 51 is opened, the first compartment 211 and a second compartment 212 can be exposed, thereby facilitating inspection and maintenance. When there are many impurities, they can be cleaned up in time.

Referring to Fig. 16, the working principle of this embodiment: set a liquid storage tank 8 for storing cutting fluid; the adsorption device 1 extracts the liquid from the liquid storage tank 8, and transports it to the pre-filter device 3, and the pre-filter device 3 pairs After the liquid is preliminarily filtered (to remove impurities), the liquid enters the oil-water separation device 2; an oil storage tank 9 is installed, and the oil-water separation device 2 separates the liquid from oil to water, and the oil is discharged into the oil storage tank 9, and the oil after the oil is filtered On the one hand, the liquid can directly enter the liquid storage tank 8 through the emptying pipe 214 , and on the other hand, the liquid can enter the three-stage filter device 4 through the pipeline for filtering, and the filtered liquid directly enters the liquid storage tank 8 for utilization.

The above content described in this specification is only an illustration of the present invention. Those skilled in the technical field to which the present invention belongs may make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, as long as they do not deviate from the content of the description of the present invention or exceed the scope defined in the claims , should belong to the protection scope of the present invention.

Claims (8)

1. A cutting fluid purifying and filtering device, comprising:

an adsorption device;

the pre-filtering device is connected with the adsorption device;

the oil-water separation device is connected with the pre-filtering device; and

the three-stage filtering device is connected with the oil-water separation device;

the adsorption device includes:

the water pumping pipe is closed at one end, and a water pumping hole is formed in the water pumping pipe;

the moving component is sleeved on the water suction pipe in a sliding mode along the water suction pipe, a gap is formed between the moving component and the water suction pipe in the radial direction, and a suction inlet is formed in the lower portion of the gap; and

the telescopic sleeve is provided with a bottom surface fixed with one closed end of the water suction pipe, a side surface capable of stretching along the axial direction of the water suction pipe and a top surface connected with the moving member, at least the side surface of the telescopic sleeve is configured to pass through liquid, and when the side surface stretches along the axial direction of the water suction pipe, the top surface drives the moving member to move along the axial direction of the water suction pipe;

the cross-sectional shape of the side surface is configured to be wavy or broken line;

the telescopic sleeve is made of rubber;

the side surface is configured to expand after absorbing liquid, thereby expanding and contracting the side surface along the water pumping pipe;

the moving member has a buoyancy structure to increase the buoyancy of the moving member.

2. The cutting fluid purifying and filtering apparatus according to claim 1, wherein the buoyancy structure is a groove provided at an upper surface of the moving member.

3. The cutting fluid purifying and filtering apparatus according to claim 1, wherein the oil-water separating apparatus comprises:

a separation cylinder having a receiving chamber; and

a liquid inlet pipe which is communicated with the separation cylinder and is configured to feed liquid to the separation cylinder;

the upper part of the separating cylinder is provided with a first bin and a second bin, the first bin is communicated with the accommodating cavity through an oil overflow port, the first bin is provided with an oil collecting port, and liquid in the accommodating cavity flows into the first bin through the oil overflow port and is recovered from the oil collecting port;

the second bin is internally provided with a pipe part, the lower end of the pipe part extends into the separating cylinder, the upper end of the pipe part is communicated with the second bin, the upper end of the pipe part is provided with an outlet part, the upper end of the outlet part is provided with a water outlet, and the height of the water outlet is lower than that of the oil overflow port.

4. The cutting fluid purifying and filtering apparatus according to claim 3, wherein the outlet portion includes a connection portion and an adjusting unit, the adjusting unit being disposed on the connection portion so as to be adjustable in an up-down direction along an axial direction of the pipe portion, so as to adjust a height of the water outlet.

5. The cutting fluid purifying and filtering apparatus according to claim 4, wherein the adjusting unit is screw-coupled with the coupling portion, and the coupling portion is fixed to an upper end of the pipe portion.

6. The cutting fluid purifying and filtering apparatus according to claim 3, wherein the upper portion of the receiving chamber has an opening portion, the position of the opening portion is matched with the height positions of the first and second chambers, a first cover plate is disposed at the opening portion, the first cover plate has a buffer plate, the buffer plate is inclined in a direction away from the fluid inlet pipe in a downward process, the buffer plate divides the opening portion into a first portion and a second portion, the fluid inlet pipe corresponds to the first portion, and the second portion corresponds to the fluid outlet.

7. A cutting fluid purifying and filtering apparatus according to claim 3, wherein the lower end of said pipe portion extends at least to a position beyond the middle of the height direction of said separation cylinder.

8. The cutting fluid purifying and filtering apparatus according to claim 3, wherein the bottom of the oil overflow port is straight, and the width of the oil overflow port is at least one third of the diameter of the separating cylinder.

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