CN212440371U

CN212440371U - Cooling liquid recycling and purifying device

Info

Publication number: CN212440371U
Application number: CN202021850974.6U
Authority: CN
Inventors: 赵苗; 徐冠平; 徐斌; 龚喜
Original assignee: Speed Technology Machinery Manufacturing Changshu Co ltd
Current assignee: Speed Technology Machinery Manufacturing Changshu Co ltd
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2021-02-02
Anticipated expiration: 2030-08-31

Abstract

A cooling liquid recovery and purification device belongs to the technical field of machining auxiliary equipment. Including the support body, establish vacuum bucket, filter vat, oil strain case and overflow air pump and oil strain air pump on the support body, characteristics: the bottom of the oil filter box is provided with a gas-liquid mixing device connected with an oil filter air pump, the oil filter box is internally divided into a plurality of mutually communicated filter cavities and a liquid outlet cavity with the bottom communicated with the filter cavities, the gas-liquid mixing device is communicated with the bottom of one filter cavity, the filter cavities are respectively provided with a bubble combining device, and the bubble combining device comprises a group of bubble combining partition plates which are vertically spaced and are arranged in a left-right staggered mode, a pair of screw rods which are vertically arranged on the group of bubble combining partition plates in a penetrating mode and a group of nuts which are connected with the screw rods and are respectively arranged between two adjacent bubble combining partition plates. The advantages are that: the number of power supply equipment is reduced, the overall structure is simplified, and the equipment cost is reduced; the filtering effect and the speed of the oil are improved, the service life and the replacement period of the cooling liquid are prolonged, the waste oil discharge is reduced, and the environment is protected.

Description

Cooling liquid recycling and purifying device

Technical Field

The utility model belongs to the technical field of the machining auxiliary assembly, concretely relates to purifier is retrieved to coolant liquid.

Background

The cooling liquid is sprayed on the machining position of the part, so that the temperature of a cutter can be reduced, a workpiece can be cleaned, the cooling liquid can be generally recycled, waste oil and waste residues in the cooling liquid are more and more along with the increase of the reuse times of the cooling liquid, and the cooling liquid needs to be replaced by new cooling liquid until the cooling liquid cannot be used. Also there are some filterable devices of waste oil waste residue in the coolant liquid in the existing market, and wherein the filtration of waste residue is comparatively simple, can directly filter through the filter screen, nevertheless to the filtration of waste oil comparatively difficult, the filter effect is not ideal, and the structure of filtration equipment is more complicated, and is with high costs.

In the prior art, "a coolant liquid filter equipment" as provided in chinese utility model patent publication No. CN203342527U, including oil tank, filter equipment and oil pump, the oil tank includes one-level oil tank and second grade oil tank, filter equipment includes one-level filter equipment, second grade filter equipment and tertiary filter equipment, the oil pump includes one-level oil pump and second grade oil pump, connects gradually one-level oil tank, one-level filter equipment, one-level oil pump, second grade filter equipment, second grade oil tank, second grade oil pump and tertiary filter equipment, still be equipped with oil water separator between one-level filter equipment and the second grade filter equipment, adopt the structure that multiple stage filtration and oil water separator combined together, though can play good filter effect, overall structure is great, with too high costs, needs a large amount of power supplies to carry the coolant liquid, is unfavorable for the energy saving. For example, the "integrated regeneration filter for coolant emulsion in machining industry" disclosed in the chinese utility model patent publication No. CN209155302U includes a box, a filtering mechanism, and a control system, wherein the filtering mechanism is disposed in the box, the box is provided with a liquid mixing inlet, the filtering mechanism includes a coarse filtering mechanism, a fine filtering mechanism, a precipitation filtering mechanism, an oil floating mechanism, an oil liquid filtering mechanism, and an ozone sterilization system; deposit filtering mechanism and set up in the box lower part, separate the pond including the level four that arrange in proper order, the level four separates mutual isolation between the pond, has adopted integral type multi-stage filtration's structure and has collected and handle the oil slick of liquid level, though the structure is less and comparatively compact, has practiced thrift a large amount of area, but holistic filter effect is relatively poor, and is especially slower to the collection and the processing rate of waste oil, is unfavorable for the filtration of coolant liquid in the course of working.

In view of the above circumstances, there is a need to design a cooling liquid recycling and purifying device that has a simple structure, low cost and good filtering effect and can rapidly filter waste oil and waste residue. The applicant has therefore made an advantageous design, in the context of which the solution to be described below is made.

Disclosure of Invention

The task of the utility model is to provide a purifier is retrieved to coolant liquid, the absorption structure that helps improving the coolant liquid reduces power equipment's use and then simplifies overall structure and reduce cost, is favorable to optimizing the filter structure to waste oil and improves the filter effect and the speed of waste oil, has prolonged the life and the change cycle of coolant liquid effectively, has reduced waste oil discharge and has protected the environment.

The utility model discloses a task is accomplished like this, a purifier is retrieved to coolant liquid, including a support body, a vacuum bucket of setting on the support body, one set up in vacuum bucket top and with the filter vat of vacuum bucket intercommunication, one fix the oil strain tank on the support body, one with the overflow air pump of vacuum bucket intercommunication and one with the oil strain air pump of vacuum bucket and oil strain tank intercommunication, its characterized in that: the oil filter comprises an oil filter box and is characterized in that a gas-liquid mixing device connected with an oil filter pump is arranged at the bottom of the oil filter box, a plurality of mutually communicated filter cavities and a liquid outlet cavity with the bottom communicated with the filter cavities are separated in a cavity of the oil filter box, the gas-liquid mixing device is communicated with the bottom of one of the filter cavities, a bubble combining device is arranged in each filter cavity and comprises a group of bubble combining partition plates which are vertically separated and are staggered left and right, a pair of screw rods which are vertically penetrated through the group of bubble combining partition plates and a group of nuts which are connected with the screw rods and are respectively arranged between the two adjacent bubble combining partition plates, and the bubble combining device is supported at the bottom of the corresponding filter cavity through the screw rods.

In a specific embodiment of the present invention, a vacuum barrel cover hermetically connected to the vacuum barrel is disposed above the vacuum barrel, and an exhaust tube and a suction tube are disposed on the vacuum barrel cover; a filter vat liquid outlet pipe is arranged below the bottom of the filter vat and communicated with the liquid suction pipe.

The utility model discloses a in another concrete embodiment, detachably is connected with a filter screen in the die cavity of filter vat, the position department that is located the filter screen top on one side lateral wall of filter vat installs a feed liquor interface that is used for with the coolant liquid case intercommunication, the top lid of filter vat is equipped with a filter barrel lid, and the bung hole of this filter vat is provided with the round sealing washer in the position department of being connected with the filter barrel lid all around.

The utility model discloses a further concrete embodiment, the filter chamber is enclosed to constitute by the curb plate of an last filtrate board, a division board that is located the oil filter box middle part and oil filter box body respectively and forms, the height that highly is less than lower filtrate board of last filtrate board the inlet has been seted up to the below of filtrate board height direction down, the filter chamber communicate with play liquid chamber and adjacent filter chamber through inlet respectively, the height of oil filter box body, division board all is higher than the height of filtrate board down set up an at least oil outlet on the wall body of a curb plate of oil filter box body and corresponding to the position department at lower filtrate board upper edge on the oil outlet and the position that is located the oil filter box outside is connected with an oil pipe.

In another specific embodiment of the present invention, one side of the vacuum barrel is provided with a lower liquid outlet and an upper liquid outlet, the upper liquid outlet is located above the lower liquid outlet, the oil filter air pump is connected to the lower liquid outlet through an oil filter air pump inlet pipe, the upper side of the oil filter air pump is provided with an oil filter air pump outlet pipe connected to the gas-liquid mixing device and supplying liquid to the oil filter tank, the overflow air pump is connected to the upper liquid outlet through an overflow pump inlet pipe, the upper side of the overflow air pump is provided with an overflow air pump outlet pipe, the frame body is provided with an overflow joint, the overflow air pump outlet pipe is connected to the overflow joint, and the overflow joint is communicated to the cooling liquid tank through a pipeline.

In a further embodiment of the present invention, the oil filter box is provided with a feed pipe elbow in a filter chamber opposite to the gas-liquid mixing device, one end of the feed pipe elbow being communicated with one end of the gas-liquid mixing device and the other end extending upward in the filter chamber and forming a downward bend; the wall body below the liquid outlet cavity of the oil filter box is provided with a filtrate outlet pipe, the frame body is fixedly provided with a filtrate joint communicated with the cooling liquid box, the filtrate outlet pipe is connected with the filtrate joint, the liquid outlet cavity is upwards extended at a position communicated with the filtrate outlet pipe to form a filtrate pipe with an upper end opening and communicated with the filtrate outlet pipe, and the height of the filtrate pipe is parallel and level with the height of the lower filtrate plate.

In a more specific embodiment of the present invention, a clean blow-off pipe is disposed at the bottom of the oil filtering tank, and a pushing handle is further fixed to one side of the oil filtering tank.

In yet another specific embodiment of the present invention, the outer side of the frame body is fixed with a shell surrounding the vacuum barrel, the filter barrel, the oil filter tank, the overflow air pump and the oil filter air pump, and a set of rollers is installed below the frame body.

In a still more specific embodiment of the present invention, the upper opening of the oil filtering tank is hinged with a cover of the oil filtering tank.

In a more specific embodiment of the present invention, the frame body on one side of the overflow air pump and the oil filter air pump is respectively fixed with a filtered air pressure regulating valve and a pressure regulating valve, one side of the filtered air pressure regulating valve is formed with an air inlet pipe, and the other side is connected with a pipe divider, one end of the pipe divider is connected with the overflow air pump and the other end is connected with the pressure regulating valve, and the pressure regulating valve is connected with the oil filter air pump and the air supply.

The utility model adopts the above structure after, beneficial effect who has: firstly, because the vacuum barrel is adopted to pump the liquid in the filter barrel and the cooling liquid tank under negative pressure and the liquid is conveyed into the oil filter tank and the overflow interface by the two air pumps, the quantity of power supply equipment is greatly reduced, the integral structure is effectively simplified and the equipment cost is reduced; secondly, because the structure that the gas-liquid mixing device is arranged below the oil filter box and the combination efficiency of the micro bubbles, the residues and the oil is improved through the bubble combination device is adopted, the filtering effect and the speed of the oil are greatly improved, the service life and the replacement period of the cooling liquid are effectively prolonged, the waste oil discharge is reduced, and the environment is protected.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the present invention.

Fig. 2 is a schematic perspective view of the other side of the embodiment in fig. 1.

Fig. 3 is a schematic structural view of the present invention in a use state.

In the figure: 1. the frame body, 11, the roller, 12, the shell; 2. the vacuum barrel comprises a vacuum barrel, 21 vacuum barrel covers, 211 an air exhaust pipe, 212 a liquid suction pipe, 22 a lower liquid outlet port and 23 an upper liquid outlet port; 3. the filter comprises a filter barrel, a filter screen, a liquid inlet interface, a filter barrel liquid outlet pipe, a filter barrel cover, a filter barrel, a filter screen, a liquid inlet interface, a filter liquid outlet pipe, a filter barrel cover and a seal ring, wherein the filter barrel is 31, the filter screen is 32, the liquid inlet interface; 4. the filter tank comprises a filter tank body, 41, a filter cavity, 411, an upper filter liquid plate, 412, a lower filter liquid plate, 413, a partition plate, 4121, a liquid inlet, 42, a liquid outlet cavity, 43, a bubble combination device, 431, a bubble combination partition plate, 432, a screw rod, 433, a nut, 44, a gas-liquid mixing device, 441, a liquid inlet bent pipe, 442, an elbow, 45, a filter liquid outlet pipe, 451, a filter liquid pipe, 452, a filter liquid joint, 46, an oil outlet, 461, an oil outlet pipe, 47, a pushing handle, 48, a clean drain pipe and 49, a filter tank cover; 5. overflow air pump, 51, overflow pump liquid inlet pipe, 52, overflow air pump liquid outlet pipe, 53, overflow joint; 6. an oil and gas filter 61, an oil and gas filter liquid inlet pipe 62, and an oil and gas filter liquid outlet pipe 62; 7. a filtered gas pressure regulating valve, 71, an air inlet pipe, 72 and a pipe separator; 8. a pressure regulating valve.

Detailed Description

The applicant shall now make the following detailed description by way of example, but the description of the example is not intended to limit the solution of the present invention, and any equivalent changes made according to the inventive concept, which are merely formal and immaterial, shall be considered as the scope of the technical solution of the present invention.

In the following description, all the concepts related to the directions or orientations of up, down, left, right, front and back are given with respect to the position state of fig. 1, and thus should not be interpreted as limiting the technical solution provided by the present invention.

Referring to fig. 1 to 3, the present invention relates to a coolant recovery and purification device, which comprises a frame body 1, a vacuum tank 2 disposed on the frame body 1, a filter tank 3 disposed above the vacuum tank 2 and communicated with the vacuum tank 2, an oil filter tank 4 fixed on the frame body 1, an overflow air pump 5 communicated with the vacuum tank 2, and an oil filter pump 6 communicated with the vacuum tank 2 and the oil filter tank 4, wherein the bottom of the oil filter tank 4 is provided with a gas-liquid mixing device 44 connected with the oil filter pump 6, the gas-liquid mixing device 44 is a gas-liquid mixing device provided in JP2020015018, the specific structure of the gas-liquid mixing device 44 is not repeated in the present invention, the gas-liquid mixing device 44 can self-suck air when liquid passes through and generate a large amount of micro-bubbles in the liquid, the micro-bubbles are combined with residue in the liquid and oil to make the liquid float on the surface, the cavity of the oil filter tank 4 is partitioned into a plurality of mutually communicated filter chambers 41 and a liquid outlet chamber 42 with a bottom communicated with the filter chambers 41, the gas-liquid mixing device 44 is communicated with the bottom of one of the filter chambers 41, the filter chambers 41 are respectively provided with a bubble combining device 43, the bubble combining device 43 comprises a group of bubble combining partition plates 431 which are vertically spaced and staggered from left to right, a pair of screw rods 432 vertically penetrating through the group of bubble combining partition plates 431 and a group of nuts 433 connected with the screw rods 432 and respectively arranged between two adjacent bubble combining partition plates 431, and the bubble combining device 43 is supported at the bottom of the corresponding filter chamber 41 through the screw rods 432.

Further, a vacuum barrel cover 21 hermetically connected with the vacuum barrel 2 is arranged above the vacuum barrel 2, and an air exhaust pipe 211 and a liquid suction pipe 212 are arranged on the vacuum barrel cover 21; a lauter tub outlet pipe 33 is provided below the bottom of the lauter tub 3, and the lauter tub outlet pipe 33 is communicated with the liquid suction pipe 212.

In this embodiment, a filter screen 31 is detachably connected to the cavity of the filter vat 3, a liquid inlet 32 for communicating with the coolant tank is installed on the sidewall of one side of the filter vat 3 and above the filter screen 31, a filter vat cover 34 is covered above the filter vat 3, and a ring of sealing ring 35 is installed around the opening of the filter vat 3 and at the position where the opening is connected to the filter vat cover 34.

Further, the filter chamber 41 is surrounded by an upper filter plate 411, a lower filter plate 412, a partition 413 located in the middle of the oil filter tank 4, and a side plate of the oil filter tank 4, the upper filter plate 411 is lower than the lower filter plate 412, a liquid inlet 4121 is opened below the lower filter plate 412 in the height direction, the filter chamber 41 is communicated with the liquid outlet chamber 42 and the adjacent filter chamber 41 through the liquid inlet 4121, the height of the oil filter tank 4 and the partition 413 is higher than the height of the lower filter plate 412, at least one oil outlet 46 is opened on the wall body of the side plate of the oil filter tank 4 and corresponding to the upper edge of the lower filter plate 412, one oil outlet is shown in this embodiment, and an oil outlet 461 is connected to the oil outlet 46 and located outside the oil filter tank 4.

Further, a lower liquid outlet 22 and an upper liquid outlet 23 are disposed on one side of the vacuum tank 2, the upper liquid outlet 23 is located above the lower liquid outlet 22, the oil and gas pump 6 is connected to the lower liquid outlet 22 through an oil and gas pump inlet 61, an oil and gas pump outlet 62 connected to the gas-liquid mixing device 44 and supplying liquid to the oil filter tank 4 is formed above the oil and gas pump 6, the overflow gas pump 5 is connected to the upper liquid outlet 23 through an overflow pump inlet 51, an overflow gas pump outlet 52 is formed above the overflow gas pump 5, an overflow joint 53 is mounted on the frame body 1, the overflow gas pump outlet 52 is connected to the overflow joint 53, and the overflow joint 53 is communicated with the cooling liquid tank through a pipeline.

Further, the oil filter tank 4 is provided with a liquid inlet bent pipe 441 in a filter chamber 41 opposite to the gas-liquid mixing device 44, one end of the liquid inlet bent pipe 441 is communicated with one end of the gas-liquid mixing device 44, and the other end extends upward in the filter chamber 41 and forms a downward elbow 442; a filtrate outlet pipe 45 is formed on the wall body below the liquid outlet cavity 42 of the oil filter tank 4, a filtrate joint 452 for communicating with the cooling liquid tank is fixed on the frame body 1, the filtrate outlet pipe 45 is connected with the filtrate joint 452, a filtrate pipe 451 which is opened at the upper end and is communicated with the filtrate outlet pipe 45 extends upwards at the position where the liquid outlet cavity 42 is communicated with the filtrate outlet pipe 45, and the height of the filtrate pipe 451 is equal to the height of the lower filtrate plate 412. The bottom of the oil filter tank 4 is provided with a clean blow-off pipe 48, one side of the oil filter tank 4 is also fixed with a pushing handle 47, and the upper opening of the oil filter tank 4 is hinged with an oil filter tank cover 49.

Further, a casing 12 enclosing the vacuum tank 2, the filter tank 3, the oil filter tank 4, the overflow air pump 5 and the oil filter air pump 6 is fixed on the outer side of the frame body 1, and a set of rollers 11 is installed below the frame body 1.

Further, a filtered air pressure regulating valve 7 and a pressure regulating valve 8 are respectively fixed on the frame body 1 on one side of the overflow air pump 5 and the oil filtering air pump 6, an air inlet pipe 71 is formed on one side of the filtered air pressure regulating valve 7, a pipe divider 72 is connected on the other side, one end of the pipe divider 72 is connected with the overflow air pump 5 for air supply, the other end is connected with the pressure regulating valve 8, and the pressure regulating valve 8 is connected with the oil filtering air pump 6 for air supply.

Referring to fig. 1 in combination with fig. 2 and fig. 3, when the coolant needs to be filtered, the external air pump is turned on to vacuumize the vacuum barrel 2 through the air exhaust pipe 211 and generate negative pressure, the negative pressure in the vacuum barrel 2 provides the filter barrel 3 with power to suck the liquid in the coolant tank from the liquid inlet port 32, the coolant sucked through the liquid inlet port 32 is filtered through the filter screen 31 and then enters the vacuum barrel 2 from the filter barrel liquid outlet pipe 33 and the liquid suction pipe 212, the liquid level in the vacuum barrel 2 starts to rise, when the liquid level rises and exceeds the position height of the lower liquid outlet port 22, the oil filter air pump 6 pumps the coolant at the liquid level in the vacuum barrel 2 and leads the coolant into the gas-liquid mixing device 44 through the oil filter liquid outlet pipe 62, the coolant generates a large amount of micro-bubbles through the gas-liquid mixing device 44 and enters one of the filter cavities 41 in the oil filter tank 4 through the liquid inlet elbow pipe 441, the liquid level in the filtering chamber 41 rises continuously and flows into the adjacent filtering chamber 41 through the upper edge of the upper filtering plate 411 and the liquid inlet 4121 below the lower filtering plate 412 respectively, in the process, micro-bubbles in the cooling liquid are accumulated below each bubble combination partition plate 43 layer by layer and float up gradually, not only the floating speed is slowed, but also the combination rate of the micro-bubbles, residues and oil is increased, further more residues and oil in the cooling liquid are separated and filtered, the filtered cooling liquid passes through the heavy filtering chamber 41 and then enters the liquid outlet chamber 42 from the liquid inlet 4121 below until the liquid level in the liquid outlet chamber 42 exceeds the height of the filtering liquid pipe 451, the cooling liquid passes through the filtering liquid outlet pipe 45 from the filtering liquid pipe 451 and then returns into the cooling liquid tank through a pipeline from the filtering liquid joint 452, and the micro-bubbles combined with the residues and oil floating on the liquid level surface in the oil filtering tank 4 are discharged from the oil outlet pipe 461 through the oil outlet 46, thereby completing the entire filtering process of the cooling liquid. Since the suction rate of the vacuum tank 2 is always faster than the suction rate of the oil filter pump 6 and the filtering rate of the oil filter tank 4, when the liquid level in the vacuum tank 2 continuously rises and exceeds the position of the upper liquid outlet port 23, the cooling liquid at the liquid level in the vacuum barrel 2 is pumped by the overflow air pump 5 and flows back into the cooling liquid tank through the overflow port 53.

Claims

1. The utility model provides a purifier is retrieved to coolant liquid, includes a support body (1), one sets up vacuum bucket (2) on support body (1), one set up in vacuum bucket (2) top and with filter vat (3) of vacuum bucket (2) intercommunication, an oil strain case (4) of fixing on support body (1), overflow air pump (5) and an oil strain air pump (6) with vacuum bucket (2) and oil strain case (4) intercommunication of vacuum bucket (2) intercommunication, its characterized in that: the bottom of the oil filter tank (4) is provided with a gas-liquid mixing device (44) connected with an oil filter pump (6), a plurality of mutually communicated filter cavities (41) are partitioned in a cavity of the oil filter box (4) and a liquid outlet cavity (42) with the bottom communicated with the filter cavities (41) is surrounded and partitioned, the gas-liquid mixing device (44) is communicated with the bottom of one filter chamber (41), a bubble combination device (43) is respectively arranged in the filter cavities (41), the bubble combining device (43) comprises a group of bubble combining partition plates (431) which are arranged at intervals up and down and staggered left and right, a pair of screw rods (432) which are arranged on the group of bubble combining partition plates (431) in a penetrating way up and down, and a group of nuts (433) which are connected with the screw rods (432) and are respectively arranged between two adjacent bubble combining partition plates (431), the bubble combining device (43) is supported at the bottom of the corresponding filter cavity (41) through a screw rod (432).

2. The cooling liquid recovery and purification device according to claim 1, wherein a vacuum barrel cover (21) hermetically connected with the vacuum barrel (2) is arranged above the vacuum barrel (2), and an air suction pipe (211) and a liquid suction pipe (212) are arranged on the vacuum barrel cover (21); a filter vat liquid outlet pipe (33) is arranged below the bottom of the filter vat (3), and the filter vat liquid outlet pipe (33) is communicated with the liquid suction pipe (212).

3. The cooling liquid recovery and purification device according to claim 1, wherein a filter screen (31) is detachably connected in the cavity of the filter barrel (3), a liquid inlet (32) for communicating with the cooling liquid tank is installed on the side wall of one side of the filter barrel (3) and above the filter screen (31), a filter barrel cover (34) is covered above the filter barrel (3), and a ring of sealing ring (35) is arranged around the barrel mouth of the filter barrel (3) and at the position connected with the filter barrel cover (34).

4. The coolant recovery and purification device according to claim 1, wherein the filtering chamber (41) is formed by enclosing an upper filtering liquid plate (411), a lower filtering liquid plate (412), a partition plate (413) located in the middle of the filtering tank (4) and side plates of the tank body of the filtering tank (4), the upper filtering liquid plate (411) is lower than the lower filtering liquid plate (412), a liquid inlet (4121) is formed below the lower filtering liquid plate (412) in the height direction, the filtering chamber (41) is communicated with the liquid outlet chamber (42) and the adjacent filtering chamber (41) through the liquid inlet (4121), the heights of the tank body and the partition plate (413) of the filtering tank (4) are higher than the height of the lower filtering liquid plate (412), at least one oil outlet (46) is formed on the wall body of one side plate of the tank body of the filtering tank (4) and at a position corresponding to the upper edge of the lower filtering liquid plate (412), an oil outlet pipe (461) is connected to the oil outlet hole (46) and is positioned outside the oil filter tank (4).

5. The cooling liquid recovery and purification device according to claim 1, wherein a lower liquid outlet (22) and an upper liquid outlet (23) are disposed at one side of the vacuum tank (2), the upper liquid outlet (23) is disposed above the lower liquid outlet (22), the oil-filtering air pump (6) is connected to the lower liquid outlet (22) through an oil-filtering air pump liquid inlet pipe (61), an oil-filtering air pump liquid outlet pipe (62) connected to the gas-liquid mixing device (44) and supplying liquid to the oil filtering tank (4) is disposed above the oil-filtering air pump (6), the overflow air pump (5) is connected to the upper liquid outlet (23) through an overflow pump liquid inlet pipe (51), an overflow air pump liquid outlet pipe (52) is disposed above the overflow air pump (5), an overflow joint (53) is disposed on the frame body (1), and the overflow air pump liquid outlet pipe (52) is connected to the overflow joint (53), the overflow joint (53) is communicated with the cooling liquid tank through a pipeline.

6. A coolant recovery and purification apparatus according to claim 1, wherein the oil filter tank (4) is provided with a feed pipe elbow (441) in a filter chamber (41) opposite to the gas-liquid mixing device (44), one end of the feed pipe elbow (441) communicates with one end of the gas-liquid mixing device (44), and the other end thereof extends upward in the filter chamber (41) and forms a downward elbow (442); constitute on the wall body of play liquid chamber (42) below of oil strain case (4) and have a filtrating drain pipe (45), support body (1) on be fixed with one be used for with the filtrating joint (452) of coolant liquid case intercommunication, filtrating drain pipe (45) be connected with filtrating joint (452), the position department that goes out liquid chamber (42) and filtrating drain pipe (45) intercommunication upwards extend and have an upper end opening and filtrating pipe (451) with filtrating drain pipe (45) intercommunication, the height of this filtrating pipe (451) is parallel and level mutually with the height of lower filtrating board (412).

7. A coolant recovery and purification device according to claim 1, characterized in that the bottom of the oil filter tank (4) is provided with a clean drain pipe (48), and a pushing handle (47) is fixed on one side of the oil filter tank (4).

8. The cooling liquid recovery and purification device according to claim 1, wherein a casing (12) surrounding the vacuum barrel (2), the filter barrel (3), the oil filter tank (4), the overflow air pump (5) and the oil filter air pump (6) is fixed on the outer side of the frame body (1), and a group of rollers (11) is installed below the frame body (1).

9. A coolant recovery and purification device according to claim 1, characterized in that the upper opening of the oil filter tank (4) is hinged with a cover (49) of the oil filter tank.

10. The coolant recovery and purification device according to claim 1, wherein the frame body (1) at one side of the overflow air pump (5) and the oil filter air pump (6) is respectively fixed with a filtered air pressure regulating valve (7) and a pressure regulating valve (8), one side of the filtered air pressure regulating valve (7) is formed with an air inlet pipe (71), the other side is connected with a pipe divider (72), one end of the pipe divider (72) is connected with the overflow air pump (5) for air supply, the other end is connected with the pressure regulating valve (8), and the pressure regulating valve (8) is connected with the oil filter air pump (6) for air supply.