CN109481979B - Negative pressure filtration system - Google Patents
Negative pressure filtration system Download PDFInfo
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- CN109481979B CN109481979B CN201811470957.7A CN201811470957A CN109481979B CN 109481979 B CN109481979 B CN 109481979B CN 201811470957 A CN201811470957 A CN 201811470957A CN 109481979 B CN109481979 B CN 109481979B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/056—Construction of filtering bands or supporting belts, e.g. devices for centering, mounting or sealing the filtering bands or the supporting belts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/80—Accessories
Abstract
The invention discloses a negative pressure filtering system, which comprises a coarse filtering device and a plurality of negative pressure filtering devices; the coarse filtering device is provided with a liquid outlet pipe; the input end of each negative pressure filtering device is respectively provided with a connecting pipe, and each connecting pipe is respectively connected with a liquid outlet pipe; the output end of each negative pressure filtering device is respectively connected with a liquid supply branch pipe, and each liquid supply branch pipe is respectively connected with a liquid supply main pipe; the negative pressure filtering device comprises a main shell; a dirty liquid cavity is arranged at the upper part in the main shell, and a clean liquid cavity is arranged at the lower part in the main shell; the dirty liquid cavity is provided with a filter paper filtering mechanism and a circulating filter belt filtering mechanism; the liquid purifying cavity is externally connected with a liquid purifying suction pump; a liquid purifying tank is also arranged above the main shell; the output end of the purified liquid suction pump is connected with the purified liquid box through a purified liquid conveying pipe; the liquid purification box is provided with a floating oil collecting device. The negative pressure filtering system has the advantages that the negative pressure filtering system not only has the function of removing scraps, but also has the function of removing oil, and has better filtering effect; and the number of the negative pressure filtering devices working on line can be freely increased and decreased.
Description
Technical Field
The invention relates to a negative pressure filtration system.
Background
The lathe can produce metal chipping in the course of the work, and metal chipping and cutting fluid can be exported by the lathe liquid outlet, and the bits cutting fluid that contains of output needs to be retrieved to the retrieval and utilization. Before the metal chips in the chip-containing cutting fluid are recycled, the metal chips need to be filtered. In addition, the cutting fluid also contains oil such as machine tool guide lubricating oil, and the oil needs to be filtered as much as possible.
Disclosure of Invention
The invention aims to provide a negative pressure filtering system which not only has the function of removing scraps, but also has the function of removing oil, and has better filtering effect; and the number of the negative pressure filtering devices working on line can be freely increased and decreased.
In order to achieve the above object, the present invention provides a negative pressure filtration system, comprising: the device comprises a coarse filtering device and a plurality of negative pressure filtering devices positioned below the coarse filtering device;
the top of the coarse filtering device is provided with: a dirty liquid inlet pipe for inputting the chip-containing cutting liquid; the inside of coarse filtration device is equipped with: a coarse filtering mechanism for performing coarse filtering on the input chip-containing cutting fluid; the bottom of the coarse filtering device is provided with: a horizontal liquid outlet pipe for outputting the liquid after coarse filtration;
the input end of each negative pressure filter device is positioned right below the liquid outlet pipe, and the negative pressure filter devices are sequentially arranged along the extension direction of the liquid outlet pipe; the input end of each negative pressure filtering device is respectively provided with a vertical connecting pipe, the top end of each connecting pipe is respectively connected with the liquid outlet pipe, the bottom end of each connecting pipe is respectively butted with the input end of the corresponding negative pressure filtering device, and each connecting pipe is respectively provided with a flow regulating valve and a stop valve; the output end of each negative pressure filtering device is respectively connected with a liquid supply branch pipe, each liquid supply branch pipe is respectively connected with a liquid supply main pipe, and each liquid supply branch pipe is respectively provided with a liquid supply pump;
the negative pressure filtering device comprises a main shell; a dirty liquid cavity is arranged at the upper part in the main shell, and a clean liquid cavity is arranged at the lower part in the main shell; the input end of the negative pressure filtering device is positioned at the top of the dirty liquid cavity; the dirty liquid cavity is provided with a filter paper filtering mechanism and a circulating filter belt filtering mechanism; the liquid purifying cavity is externally connected with a liquid purifying suction pump; a liquid purifying tank is also arranged above the main shell; the output end of the purified liquid suction pump is connected with the purified liquid box through a purified liquid conveying pipe; the liquid purifying tank is provided with a floating oil collecting device;
the floating oil collecting device comprises a liquid purifying box arranged in the liquid purifying box: the vertical inner barrel with the upward barrel opening and the vertical outer barrel which is sleeved on the barrel wall of the inner barrel and has the downward barrel opening are arranged on the inner barrel; the outer barrel and the inner barrel share the axis, and the barrel wall of the outer barrel is in sliding fit with the barrel wall of the inner barrel; the axial length of the inner barrel wall is smaller than that of the outer barrel wall; the bottom of the outer barrel is provided with a floating plate, and the floating plate is provided with a vertical through hole; a vertical liquid pumping pipe penetrates through the through hole, and the outer diameter of the liquid pumping pipe is smaller than the inner diameter of the through hole; the bottom end of the liquid pumping pipe is connected with the bottom of the inner barrel, and the inner barrel is supported by the liquid pumping pipe; a liquid pumping port is arranged on the pipe wall of the liquid pumping pipe and is positioned in the inner barrel; the liquid pumping pipe also penetrates through the top wall of the liquid purifying box, and the liquid pumping pipe is supported by the top wall of the liquid purifying box; the top end of the liquid pumping pipe is provided with a liquid pumping pump; the output end of the liquid pump is communicated with the dirty liquid cavity through a liquid return pipe; the joint part of the liquid return pipe and the dirty liquid cavity is positioned at the top end of the dirty liquid cavity; the purified liquid conveying pipe extends into the purified liquid box from the top wall of the purified liquid box, and extends to the lower part of the opening of the inner barrel; the bottom of the liquid purifying box is provided with a liquid outlet to which the output end of the negative pressure filtering device is connected.
Preferably, a sealing ring is further arranged between the wall of the outer barrel and the wall of the inner barrel, an annular mounting groove for mounting the sealing ring is formed in the peripheral surface of the wall of the inner barrel, the annular mounting groove and the inner barrel share the same axis, and the sealing ring is fixed in the annular mounting groove.
Preferably, the annular mounting groove is positioned at the top end of the inner barrel.
Preferably, the liquid pumping pipe is provided with a check valve, the check valve is positioned inside the inner barrel, and the liquid pumping port is positioned below the check valve.
Preferably, the endless filter belt filter mechanism comprises: the circulating filter belt and a driving device for driving the circulating filter belt to drive.
Preferably, the filter paper filtering mechanism includes: filter paper unwinding device, filter paper to and waste paper coiling mechanism.
Preferably, the liquid purifying cavity is provided with a differential pressure transmitter.
The invention has the advantages and beneficial effects that: the negative pressure filtering system has the advantages that the negative pressure filtering system not only has a chip removing function, but also has an oil removing function, and has a better filtering effect; and the number of the negative pressure filtering devices working on line can be freely increased and decreased.
The chip-containing cutting fluid output by the machine tool is input into the coarse filtering device through the dirty fluid inlet pipe for coarse filtering, the coarsely filtered fluid is output to the liquid outlet pipe and then distributed to each negative pressure filtering device through the connecting pipe, the negative pressure filtering device is provided with a paper tape filtering mechanism and a circulating filter belt filtering mechanism, the input fluid can be further filtered, and metal chips and most of oil in the cutting fluid can be filtered through the two times of filtering; the clean liquid output by each negative pressure filter device is converged into the liquid supply main pipe through the liquid supply branch pipe, and the clean liquid in the liquid supply main pipe can be input into the machine tool liquid box for recycling. And each connecting pipe is respectively provided with a flow regulating valve and a stop valve, so that the input flow of each negative pressure filtering device can be independently controlled, and the number of the negative pressure filtering devices working on line can be freely increased and decreased.
Although the negative pressure filtering device can filter most of oil in the cutting fluid; however, the clean liquid in the clean liquid tank still contains some oil, floating oil is formed in the clean liquid tank, the performance of the cutting liquid in the clean liquid tank is affected if the floating oil covers the liquid level of the clean liquid tank, and the floating oil collecting device can further remove the floating oil in the clean liquid tank.
When the liquid level in the liquid purifying tank reaches the following height, the liquid pump is started: the liquid level of the liquid purifying box is higher than the opening of the inner barrel; the vertical distance between the liquid level of the liquid purifying tank and the opening of the inner barrel is larger than the thickness of the bottom of the outer barrel; the vertical distance between the liquid level of the liquid purifying tank and the bottom of the inner barrel is smaller than the axial length of the wall of the outer barrel;
when the liquid pump is started, the space surrounded by the outer barrel and the inner barrel is filled with liquid, and the floating plate (namely the barrel bottom of the outer barrel) is in a state of being lifted by the liquid;
after the liquid pump is started, the liquid pump continuously pumps liquid from the inner barrel through the liquid pumping pipe, the floating plate moves downwards, and floating oil on the liquid surface of the liquid purifying tank continuously flows into the outer barrel through the through hole on the top surface of the floating plate, so that the recovery of the floating oil on the liquid surface of the liquid purifying tank is realized; the recovered floating oil can be pumped away by the liquid pumping pipe and sent into the dirty liquid cavity through the liquid return pipe, and can be filtered again by the filter paper filtering mechanism and the circulating filter belt filtering mechanism.
Drawings
FIG. 1 is a schematic view of a negative pressure filtration system;
fig. 2 is a schematic view of a negative pressure filtration device.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The technical scheme of the specific implementation of the invention is as follows:
as shown in fig. 1 and 2, a negative pressure filtration system includes: a coarse filtering device 100, and a plurality of negative pressure filtering devices 200 positioned below the coarse filtering device 100;
the top of the coarse filtering device 100 is provided with: a dirty liquid inlet pipe 101 for feeding a chip-containing cutting liquid; the inside of the coarse filter device 100 is provided with: a coarse filter mechanism (not shown) for coarsely filtering the supplied chip-containing cutting fluid; the bottom of the coarse filtering device 100 is provided with: a flat liquid outlet pipe 102 for outputting the liquid after coarse filtration;
the input end of each negative pressure filter device 200 is positioned right below the liquid outlet pipe 102, and the negative pressure filter devices 200 are arranged in sequence along the extending direction of the liquid outlet pipe 102; the input end of each negative pressure filtering device 200 is respectively provided with a vertical connecting pipe 201, the top end of each connecting pipe 201 is respectively connected with the liquid outlet pipe 102, the bottom end of each connecting pipe 201 is respectively butted with the input end of the corresponding negative pressure filtering device 200, and each connecting pipe 201 is respectively provided with a flow regulating valve (not shown in the figure) and a stop valve (not shown in the figure); the output end of each negative pressure filter device 200 is connected with a liquid supply branch pipe 202, each liquid supply branch pipe 202 is connected with a liquid supply main pipe (not shown in the figure), and each liquid supply branch pipe 202 is provided with a liquid supply pump 203;
the negative pressure filtering device 200 comprises a main shell 1; a dirty liquid cavity 11 is arranged at the upper part in the main shell 1, and a clean liquid cavity 12 is arranged at the lower part in the main shell 1; the input end of the negative pressure filtering device 200 is positioned at the top of the dirty liquid cavity 11; the dirty liquid cavity 11 is provided with a filter paper filtering mechanism 2 and a circulating filter belt filtering mechanism 3; the clean liquid cavity 12 is externally connected with a clean liquid suction pump 41; a liquid purifying tank 5 is also arranged above the main shell 1; the output end of the purified liquid suction pump 41 is connected with the purified liquid tank 5 through a purified liquid conveying pipe 42; the liquid purifying tank 5 is provided with a floating oil collecting device 6;
the floating oil collecting device 6 comprises a liquid purifying tank 5: a vertically arranged inner barrel 61 with an upward barrel opening, and a vertically arranged outer barrel 62 which is sleeved on the barrel wall of the inner barrel 61 and has a downward barrel opening; the outer barrel 62 and the inner barrel 61 are coaxial, and the barrel wall of the outer barrel 62 is in sliding fit with the barrel wall of the inner barrel 61; the axial length of the barrel wall of the inner barrel 61 is less than that of the outer barrel 62; the bottom of the outer barrel 62 is a floating plate 63, and the floating plate 63 is provided with a vertical through hole 64; a vertical liquid extracting pipe 65 penetrates through the through hole 64, and the outer diameter of the liquid extracting pipe 65 is smaller than the inner diameter of the through hole 64; the bottom end of the liquid extracting pipe 65 is connected with the bottom of the inner barrel 61, and the inner barrel 61 is supported by the liquid extracting pipe 65; a liquid suction port (not shown) is arranged on the pipe wall of the liquid suction pipe 65 and is positioned inside the inner barrel 61; the liquid extracting pipe 65 also penetrates through the top wall of the liquid purifying tank 5, and the liquid extracting pipe 65 is supported by the top wall of the liquid purifying tank 5; the top end of the liquid extracting pipe 65 is provided with an liquid extracting pump 66; the output end of the liquid pump 66 is communicated with the dirty liquid cavity 11 through a liquid return pipe 7; the joint of the liquid return pipe 7 and the dirty liquid cavity 11 is positioned at the top end of the dirty liquid cavity 11; the purified liquid conveying pipe 42 extends into the purified liquid box 5 from the top wall of the purified liquid box 5, and the purified liquid conveying pipe 42 extends to the lower part of the opening of the inner barrel 61; the bottom of the liquid purifying tank 5 is provided with a liquid outlet (not shown in the figure) for the output end of the negative pressure filtering device 200.
Preferably, a sealing ring (not shown in the figure) is further arranged between the wall of the outer barrel 62 and the wall of the inner barrel 61, an annular mounting groove (not shown in the figure) for mounting the sealing ring is arranged on the outer peripheral surface of the wall of the inner barrel 61, the annular mounting groove and the inner barrel 61 are coaxial, and the sealing ring is fixed in the annular mounting groove.
Preferably, the annular mounting groove is located at the top end of the inner barrel 61.
Preferably, the liquid suction pipe 65 is provided with a check valve (not shown), the check valve is located inside the inner barrel 61, and the liquid suction port is located below the check valve.
Preferably, the circulating filter belt filtering mechanism 3 includes: an endless filter belt 31, and a driving device for driving the endless filter belt 31.
Preferably, the filter paper filtering mechanism 2 includes: a filter paper unreeling device 21, filter paper 22, and a used paper reeling device 23.
Preferably, the liquid purifying cavity 12 is provided with a differential pressure transmitter 8.
The negative pressure filtering system has the advantages that the negative pressure filtering system not only has the function of removing scraps, but also has the function of removing oil, and has better filtering effect; and the number of the negative pressure filtering devices working on line can be freely increased and decreased.
Chip-containing cutting fluid output by a machine tool is input into a coarse filtering device 100 through a dirty fluid inlet pipe 101 for coarse filtering, the coarsely filtered fluid is output to a fluid outlet pipe 102 and then distributed to each negative pressure filtering device 200 through a connecting pipe 201, the negative pressure filtering device 200 is provided with a paper tape filtering mechanism and a circulating filter tape filtering mechanism 3, the input fluid can be further filtered, and metal debris and most of oil in the cutting fluid can be filtered through the two times of filtering; the clean liquid output by each negative pressure filter device 200 is converged into the liquid supply main pipe through the liquid supply branch pipe 202, and the clean liquid in the liquid supply main pipe can be input into a machine tool liquid box for recycling. Each connecting pipe 201 is provided with a flow regulating valve and a stop valve, so that the input flow of each negative pressure filtering device 200 can be independently controlled, and the number of the negative pressure filtering devices 200 working on line can be freely increased or decreased.
Although the negative pressure filtering device 200 can filter most of the oil in the cutting fluid; however, the clean liquid in the clean liquid tank 5 still contains some oil, which may form floating oil in the clean liquid tank 5, and if the floating oil covers the liquid surface of the clean liquid tank 5, which may affect the performance of the cutting fluid in the clean liquid tank 5, the floating oil collecting device 6 may further remove the floating oil in the clean liquid tank 5.
When the liquid level (not shown) in the clean liquid tank 5 reaches the following level, the liquid pump 66 is turned on: the liquid level of the liquid purifying box 5 is higher than the opening of the inner barrel 61; the vertical distance between the liquid level of the liquid purifying tank 5 and the opening of the inner barrel 61 is larger than the thickness of the bottom of the outer barrel 62; the vertical distance between the liquid level of the liquid purifying tank 5 and the bottom of the inner barrel 61 is smaller than the axial length of the barrel wall of the outer barrel 62;
when the liquid pump 66 is turned on, the space surrounded by the outer barrel 62 and the inner barrel 61 is filled with liquid, and the floating plate 63 (i.e., the bottom of the outer barrel 62) is in a state of being lifted by the liquid;
after the liquid pump 66 is started, the liquid pump 66 continuously pumps liquid from the inner barrel 61 through the liquid pumping pipe 65, the floating plate 63 moves downwards, and floating oil on the liquid surface of the liquid purifying tank 5 continuously flows into the outer barrel 62 through the through hole 64 on the top surface of the floating plate 63, so that the recovery of the floating oil on the liquid surface of the liquid purifying tank 5 is realized; the recovered oil slick is pumped by the pumping pipe 65 and sent into the dirty liquid cavity 11 through the liquid return pipe 7, and can be filtered again by the filter paper filtering mechanism 2 and the circulating filter belt filtering mechanism 3.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (1)
1. A negative pressure filtration system, comprising: the device comprises a coarse filtering device and a plurality of negative pressure filtering devices positioned below the coarse filtering device;
the top of the coarse filtering device is provided with: a dirty liquid inlet pipe for inputting the chip-containing cutting liquid; the inside of coarse filtration device is equipped with: a coarse filtering mechanism for performing coarse filtering on the input chip-containing cutting fluid; the bottom of the coarse filtering device is provided with: a horizontal liquid outlet pipe for outputting the liquid after coarse filtration;
the input end of each negative pressure filter device is positioned right below the liquid outlet pipe, and the negative pressure filter devices are sequentially arranged along the extension direction of the liquid outlet pipe; the input end of each negative pressure filtering device is respectively provided with a vertical connecting pipe, the top end of each connecting pipe is respectively connected with the liquid outlet pipe, the bottom end of each connecting pipe is respectively butted with the input end of the corresponding negative pressure filtering device, and each connecting pipe is respectively provided with a flow regulating valve and a stop valve; the output end of each negative pressure filtering device is respectively connected with a liquid supply branch pipe, each liquid supply branch pipe is respectively connected with a liquid supply main pipe, and each liquid supply branch pipe is respectively provided with a liquid supply pump;
the negative pressure filtering device comprises a main shell; a dirty liquid cavity is arranged at the upper part in the main shell, and a clean liquid cavity is arranged at the lower part in the main shell; the input end of the negative pressure filtering device is positioned at the top of the dirty liquid cavity; the dirty liquid cavity is provided with a filter paper filtering mechanism and a circulating filter belt filtering mechanism; the filter paper filtering mechanism comprises: the device comprises a filter paper unreeling device, filter paper and a waste paper reeling device; the circulating filter belt filtering mechanism comprises: the circulating filter belt and a driving device for driving the circulating filter belt to transmit; the liquid purifying cavity is also provided with a differential pressure transmitter; the liquid purifying cavity is externally connected with a liquid purifying suction pump; a liquid purifying tank is also arranged above the main shell; the output end of the purified liquid suction pump is connected with the purified liquid box through a purified liquid conveying pipe; the liquid purifying tank is provided with a floating oil collecting device;
the floating oil collecting device comprises a liquid purifying box arranged in the liquid purifying box: the vertical inner barrel with the upward barrel opening and the vertical outer barrel which is sleeved on the barrel wall of the inner barrel and has the downward barrel opening are arranged on the inner barrel; the outer barrel and the inner barrel share the axis, and the barrel wall of the outer barrel is in sliding fit with the barrel wall of the inner barrel; the axial length of the inner barrel wall is smaller than that of the outer barrel wall; the bottom of the outer barrel is provided with a floating plate, and the floating plate is provided with a vertical through hole; a vertical liquid pumping pipe penetrates through the through hole, and the outer diameter of the liquid pumping pipe is smaller than the inner diameter of the through hole; the bottom end of the liquid pumping pipe is connected with the bottom of the inner barrel, and the inner barrel is supported by the liquid pumping pipe; a liquid pumping port is arranged on the pipe wall of the liquid pumping pipe and is positioned in the inner barrel; the liquid pumping pipe also penetrates through the top wall of the liquid purifying box, and the liquid pumping pipe is supported by the top wall of the liquid purifying box; a sealing ring is arranged between the wall of the outer barrel and the wall of the inner barrel, an annular mounting groove for mounting the sealing ring is arranged on the peripheral surface of the wall of the inner barrel, the annular mounting groove and the inner barrel share the same axis, and the sealing ring is fixed in the annular mounting groove; the annular mounting groove is positioned at the top end of the inner barrel; the liquid pumping pipe is provided with a check valve which is positioned in the inner barrel, and the liquid pumping port is positioned below the check valve; the top end of the liquid pumping pipe is provided with a liquid pumping pump; the output end of the liquid pump is communicated with the dirty liquid cavity through a liquid return pipe; the joint part of the liquid return pipe and the dirty liquid cavity is positioned at the top end of the dirty liquid cavity; the purified liquid conveying pipe extends into the purified liquid box from the top wall of the purified liquid box, and extends to the lower part of the opening of the inner barrel; a liquid outlet is arranged at the bottom of the liquid purifying box, and the liquid outlet is taken as the output end of the negative pressure filtering device;
chip-containing cutting fluid output by the machine tool is input into the coarse filtering device through the dirty fluid inlet pipe for coarse filtering, the coarsely filtered fluid is output to the liquid outlet pipe and then distributed to each negative pressure filtering device through the connecting pipe; the negative pressure filtering device is provided with a paper tape filtering mechanism and a circulating filter tape filtering mechanism, and is used for further filtering the input liquid; filtering out metal debris and most of oil in the cutting fluid through the two filtering processes; the clean liquid output by each negative pressure filtering device is converged into a liquid supply main pipe through a liquid supply branch pipe, and the clean liquid in the liquid supply main pipe is input into a machine tool liquid box for recycling;
when the liquid level in the liquid purifying tank reaches the following height, the liquid pump is started: the liquid level of the liquid purifying box is higher than the opening of the inner barrel; the vertical distance between the liquid level of the liquid purifying tank and the opening of the inner barrel is larger than the thickness of the bottom of the outer barrel; the vertical distance between the liquid level of the liquid purifying tank and the bottom of the inner barrel is smaller than the axial length of the wall of the outer barrel;
when the liquid pump is started, the space surrounded by the outer barrel and the inner barrel is filled with liquid, and the floating plate is in a state of being supported by the liquid;
after the liquid pump is started, the liquid pump continuously pumps liquid from the inner barrel through the liquid pumping pipe, the floating plate moves downwards, and floating oil on the liquid surface of the liquid purifying tank continuously flows into the outer barrel through the through hole on the top surface of the floating plate, so that the recovery of the floating oil on the liquid surface of the liquid purifying tank is realized; the recovered floating oil is pumped away by the liquid pumping pipe, is sent into the dirty liquid cavity through the liquid return pipe, and is filtered again by the filter paper filtering mechanism and the circulating filter belt filtering mechanism.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811470957.7A CN109481979B (en) | 2018-12-04 | 2018-12-04 | Negative pressure filtration system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811470957.7A CN109481979B (en) | 2018-12-04 | 2018-12-04 | Negative pressure filtration system |
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| CN109481979A CN109481979A (en) | 2019-03-19 |
| CN109481979B true CN109481979B (en) | 2021-03-26 |
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| CN201811470957.7A Active CN109481979B (en) | 2018-12-04 | 2018-12-04 | Negative pressure filtration system |
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| CN110734186A (en) * | 2019-11-08 | 2020-01-31 | 华辰精密装备（昆山）股份有限公司 | Roll grinder waste liquid centralized treatment system |
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| CN201088874Y (en) * | 2007-08-30 | 2008-07-23 | 中国石化股份胜利油田分公司孤岛采油厂 | Flotation fuel-discharging device of oil tank |
| CN204699484U (en) * | 2015-06-15 | 2015-10-14 | 安徽江淮汽车股份有限公司 | A kind of cutting fluid centralized processing system |
| CN105169788A (en) * | 2015-09-23 | 2015-12-23 | 烟台开发区博森科技发展有限公司 | Negative pressure circulating belt filter |
| CN204976184U (en) * | 2015-08-07 | 2016-01-20 | 东北石油大学 | Cooling liquid filtering device |
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2018
- 2018-12-04 CN CN201811470957.7A patent/CN109481979B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201088874Y (en) * | 2007-08-30 | 2008-07-23 | 中国石化股份胜利油田分公司孤岛采油厂 | Flotation fuel-discharging device of oil tank |
| CN204699484U (en) * | 2015-06-15 | 2015-10-14 | 安徽江淮汽车股份有限公司 | A kind of cutting fluid centralized processing system |
| CN204976184U (en) * | 2015-08-07 | 2016-01-20 | 东北石油大学 | Cooling liquid filtering device |
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