CN112877127B - Pneumatic type lubricating oil recycling equipment - Google Patents

Pneumatic type lubricating oil recycling equipment Download PDF

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Publication number
CN112877127B
CN112877127B CN202110430873.6A CN202110430873A CN112877127B CN 112877127 B CN112877127 B CN 112877127B CN 202110430873 A CN202110430873 A CN 202110430873A CN 112877127 B CN112877127 B CN 112877127B
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filtering cylinder
cylinder body
communicated
controller
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CN112877127A (en
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胡平
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
    • C10M175/0083—Lubricating greases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
    • B01D29/56—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M175/00—Working-up used lubricants to recover useful products ; Cleaning
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The invention discloses pneumatic lubricating oil recycling equipment, and belongs to the technical field of filtering equipment. This pneumatic type lubricating oil recycling apparatus includes: the rough filtering device is used for filtering scrap iron in the lubricating oil and comprises a first oil inlet and a first oil outlet; the fine filtering device comprises a fine filtering cylinder body, a fine filtering cylinder cover, a first piston and a fine filtering core, wherein the fine filtering cylinder cover is provided with a first vent, a first oil outlet is communicated with the lower cavity, the first piston is in sealed sliding connection with the inner wall of the lower cavity, a second oil outlet is arranged at the bottom of the upper cavity, and the second oil outlet is communicated with a third switch valve; and the vacuumizing device comprises an air pumping hole and an air exhaust hole, and the air pumping hole of the vacuumizing device is communicated with the first air vent. The pneumatic lubricating oil recycling equipment can effectively remove impurities such as scrap iron and the like in the lubricating oil through classified filtration, and can also remove emulsified water and free water in the lubricating oil on the premise of not damaging the lubricating performance.

Description

Pneumatic type lubricating oil recycling equipment
Technical Field
The invention relates to the technical field of filtering equipment, in particular to pneumatic lubricating oil recycling equipment.
Background
When the lubricating oil is used for a long time, impurities such as scrap iron and the like can be mixed into the lubricating oil, the lubricating performance of the lubricating oil can be greatly reduced by mixing the impurities, and the equipment abrasion is aggravated. Impurities such as iron filings can be filtered through the filter, but water is mixed into the lubricating oil, and the water exists mainly in the forms of dissolved water, free water and emulsified water, wherein the emulsified water and the free water have the greatest harm to the lubricating oil. The presence of moisture can cause the lubricant to fail, thereby causing increased wear on the equipment.
Most of the existing lubricating oil filters remove water by a natural sedimentation method, and the natural sedimentation method can only remove free water in lubricating oil but cannot effectively remove emulsified water in the lubricating oil. And the emulsified water in the lubricating oil is removed by using high temperature, so that the molecular structure of the lubricating oil is damaged, and the lubricating performance of the lubricating oil is influenced.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provide a pneumatic type lubricating oil recycling device.
The invention provides a pneumatic lubricating oil recycling device, which comprises:
the rough filtering device is used for filtering scrap iron in lubricating oil and comprises a first oil inlet and a first oil outlet, the first oil inlet is communicated with a first switch valve, the first switch valve is electrically connected with a controller, and the controller is electrically connected with a power supply device;
the fine filtering device comprises a fine filtering cylinder body, a fine filtering cylinder cover, a first piston and a fine filtering core, wherein the fine filtering cylinder cover is fixedly connected with the fine filtering cylinder body in a sealing mode, the fine filtering cylinder cover is provided with a first vent, an inner cavity of the fine filtering cylinder body is divided into a lower cavity and an upper cavity by the fine filtering core, a first oil outlet is communicated with the lower cavity, a second switch valve is arranged between the first oil outlet and the lower cavity, the second switch valve is electrically connected with the controller, the first piston is connected with the inner wall of the lower cavity in a sealing and sliding mode, a second vent is arranged at the bottom of the lower cavity, a second oil outlet is arranged at the bottom of the upper cavity, a third switch valve is communicated with the second oil outlet, and the third switch valve is electrically connected with the controller;
and the vacuumizing device comprises an air pumping hole and an air exhaust hole, the air pumping hole of the vacuumizing device is communicated with the first air vent, and the vacuumizing device is electrically connected with the controller.
The preferred, rough filtration device includes rough filtration cylinder body, rough filtration cylinder cap, second piston and coarse strainer, rough filtration cylinder body top lateral wall is located to first oil inlet, and rough filtration cylinder body bottom is located to first oil-out, rough filtration cylinder cap and the sealed rigid coupling of rough filtration cylinder body are equipped with the third gas port on the rough filtration cylinder cap, the third gas port with evacuating device's gas vent intercommunication, the last cavity of fine filtration cylinder body has linked firmly the water absorption filter, rough filtration cylinder body bottom is located to the coarse strainer, second piston and the sealed sliding connection of rough filtration cylinder body inner wall.
Preferably, evacuating device includes solenoid valve and high-pressure vacuum pump, the A mouth of solenoid valve with first blow vent intercommunication, the P mouth of solenoid valve with high-pressure vacuum pump's extraction opening intercommunication, high-pressure vacuum pump's gas vent and the T mouth intercommunication of solenoid valve, the B mouth of solenoid valve with third blow vent intercommunication, the solenoid valve can follow A mouth and P mouth intercommunication and B mouth and T mouth intercommunication and switch into A mouth and T mouth intercommunication and B mouth and P mouth intercommunication, solenoid valve and high-pressure vacuum pump all with the controller electricity is connected, first blow vent intercommunication has the fourth ooff valve, and third ooff valve and fourth ooff valve all are connected with the controller electricity.
Preferably, the first vent is further communicated with a first air pressure sensor, the third vent is communicated with a second air pressure sensor, the first air pressure sensor and the second air pressure sensor are both electrically connected with the controller, the first air pressure sensor and the second air pressure sensor monitor air pressure signals in real time and transmit the air pressure signals to the controller, and the controller controls the high-pressure vacuum pump to act according to the air pressure signals.
Preferably, the fourth switch valve is communicated with a hydraulic sensor, the hydraulic sensor is electrically connected with the controller, the hydraulic sensor monitors a hydraulic signal in real time and transmits the hydraulic signal to the controller, and the controller controls the third switch valve to act according to the hydraulic signal.
Preferably, a sealing ring is further arranged between the rough filtering cylinder body and the rough filtering cylinder cover, and a sealing ring is also arranged between the fine filtering cylinder body and the fine filtering cylinder cover.
Preferably, the fine filter cylinder body is also internally provided with water absorption filter paper.
Compared with the prior art, the invention has the beneficial effects that: the pneumatic lubricating oil recycling equipment disclosed by the invention not only can effectively remove impurities such as scrap iron and the like in lubricating oil through classified filtration, but also can realize evaporation water removal at normal temperature through vacuum water removal, so that emulsified water and free water in the lubricating oil can be removed on the premise of not damaging the lubricating performance. The pneumatic lubricating oil recycling equipment provided by the invention can be used for continuously carrying out rough filtration and fine filtration on lubricating oil, reducing the filtration time and improving the filtration efficiency. Through setting up first baroceptor and second baroceptor, can prevent effectively that the high pressure from causing coarse filtration cylinder body, essence to strain the cylinder body or high-pressure air pump to damage. Through setting up the sealing washer, can prevent coarse rate device and fine filtration device gas leakage. Through the arrangement of the water absorption filter paper, unvaporized free water and free water in the lubricating oil can be effectively removed.
Drawings
FIG. 1 is a schematic view of the structure of the present invention;
fig. 2 is a schematic structural view of a third on/off valve according to the present invention.
Description of the reference numerals:
101. the hydraulic control system comprises a first switch valve, 102, a fine filter cylinder body, 103, a fine filter cylinder cover, 104, a first piston, 105, a fine filter element, 106, a lower cavity body, 107, an upper cavity body, 108, a second switch valve, 109, a third switch valve, 110, a controller, 201, a rough filter cylinder body, 202, a rough filter cylinder cover, 203, a second piston, 204, a rough filter element, 205, a water absorption filter, 301, an electromagnetic valve, 302, a high-pressure vacuum pump, 303, a fourth switch valve, 401, a first air pressure sensor, 402, a second air pressure sensor, 5, a hydraulic sensor and 6 water absorption filter paper.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying fig. 1 and 2, but it should be understood that the scope of the present invention is not limited to the specific embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Example 1:
as shown in fig. 1 and 2, the present invention provides a pneumatic type lubricating oil recycling apparatus, comprising: the device comprises a rough filtering device, a fine filtering device and a vacuumizing device, wherein the rough filtering device is used for filtering scrap iron in lubricating oil and comprises a first oil inlet and a first oil outlet, the first oil inlet is communicated with a first switch valve 101 and is electrically connected with a controller 110, and the controller 110 is electrically connected with a power supply device; the fine filtering device comprises a fine filtering cylinder body 102, a fine filtering cylinder cover 103, a first piston 104 and a fine filtering core 105, the fine filtering cylinder cover 103 is fixedly connected with the fine filtering cylinder body 102 in a sealing mode, the fine filtering cylinder cover 103 is provided with a first vent hole, the fine filtering core 105 divides the inner cavity of the fine filtering cylinder body 102 into a lower cavity 106 and an upper cavity 107, a first oil outlet is communicated with the lower cavity 106, a second switch valve 108 is arranged between the first oil outlet and the lower cavity 106, the second switch valve 108 is electrically connected with the controller 110, the first piston 104 is connected with the inner wall of the lower cavity 106 in a sealing sliding mode, a second vent hole is arranged at the bottom of the lower cavity 106, a second oil outlet is arranged at the bottom of the upper cavity 107, the second oil outlet is communicated with a third switch valve 109, and the third switch valve 109 is electrically connected with the controller 110; the vacuumizing device comprises an air suction port and an air exhaust port, the air suction port of the vacuumizing device is communicated with the first air vent, and the vacuumizing device is electrically connected with the controller 110.
The working principle of example 1 is now briefly described:
the first on-off valve 101 is opened by the controller 110, the lubricating oil is introduced into the rough filtering device, the first on-off valve 101 is closed, the lubricating oil is roughly filtered, after the rough filtering is completed, the second on-off valve 108 and the third on-off valve 109 are opened by the controller 110, the lubricating oil after the rough filtering is discharged from the first oil outlet to the rough filtering device, the lubricating oil after the rough filtering is discharged into the lower cavity 106 of the fine filtering device, and at this time, the second on-off valve 108 and the third on-off valve 109 are closed by the controller 110. The controller 110 turns on the vacuum extractor, and the suction port of the vacuum extractor sucks air from the upper chamber 107, so that the upper chamber 107 is in a negative pressure state. Since the fine filter element 105 between the upper chamber 107 and the lower chamber 106 is air permeable, the lower chamber 106 is also under negative pressure. Because the first piston 104 is connected with the inner wall of the lower cavity 106 in a sealing sliding manner, and the bottom of the lower cavity 106 is provided with the second vent, the first piston 104 moves upwards under the action of negative pressure to extrude lubricating oil in the lower cavity 106, and the lubricating oil is extruded to be filtered by the fine filter element 105. The lubricating oil filtered by the fine filter element 105 flows into the upper cavity 107, the upper cavity 107 is in a negative pressure state, when the vacuum degree in the upper cavity 107 reaches a certain degree, emulsified water and free water in the lubricating oil in the upper cavity 107 are evaporated, the evaporated water is pumped by the vacuum pumping device and is discharged from an exhaust port of the vacuum pumping device, and therefore the purpose of effectively removing the emulsified water and the free water in the lubricating liquid is achieved.
According to the pneumatic lubricating oil recycling equipment, impurities such as scrap iron and the like in lubricating oil can be effectively removed through classified filtration, evaporation and water removal can be realized at normal temperature through vacuum water removal, and emulsified water and free water in the lubricating oil can be removed on the premise of not damaging the lubricating performance.
Example 2:
on the basis of the embodiment 1, in order to continuously perform rough filtration and fine filtration on the lubricating oil, the filtration time is reduced, and the filtration efficiency is improved.
As shown in fig. 1, wherein, rough filtering device includes rough filtering cylinder 201, rough filtering cylinder lid 202, second piston 203 and rough filter 204, rough filtering cylinder 201 top lateral wall is located to first oil inlet, and rough filtering cylinder 201 bottom is located to first oil-out, rough filtering cylinder lid 202 and the sealed rigid coupling of rough filtering cylinder 201 are equipped with the third gas port on the rough filtering cylinder lid 202, the third gas port with evacuating device's gas vent intercommunication, the last cavity 107 of fine filtering cylinder 102 has linked firmly water absorption filter 205, rough filter 204 is located rough filtering cylinder 201 bottom, second piston 203 and the sealed sliding connection of rough filtering cylinder 201 inner wall.
As shown in fig. 1, the vacuum pumping device includes an electromagnetic valve 301 and a high-pressure vacuum pump 302, the port a of the electromagnetic valve 301 communicates with the first vent, the port P of the electromagnetic valve 301 communicates with the pumping port of the high-pressure vacuum pump 302, the exhaust port of the high-pressure vacuum pump 302 communicates with the port T of the electromagnetic valve 301, the port B of the electromagnetic valve 301 communicates with the third vent, the electromagnetic valve 301 can be switched from communicating between the port a and the port P and communicating between the port B and the port T to communicating between the port a and the port T and communicating between the port B and the port P, the electromagnetic valve 301 and the high-pressure vacuum pump 302 are both electrically connected to the controller 110, the first vent communicates with a fourth switch valve 303, and the third switch valve 109 and the fourth switch valve 303 are both electrically connected to the controller 110.
When the lubricating oil enters the strainer cylinder 201, the controller 110 closes the first on-off valve 101, opens the second on-off valve 108, closes the third on-off valve 109, and opens the fourth on-off valve 303. The electromagnetic valve 301 is connected to the port P and the port B is connected to the port T, the high-pressure vacuum pump 302 is turned on by the controller 110, the high-pressure vacuum pump 302 starts to pump air from the upper cavity 107 and exhaust the air to the upper side of the second piston 203 in the rough filter cylinder 201, the second piston 203 moves downward under the action of the air pressure, the first piston 104 moves upward, the second piston 203 pushes the lubricating oil to move downward, the lubricating oil is filtered by the rough filter 204, the rough-filtered lubricating oil enters the lower cavity 106 of the fine filter cylinder 102 through the third on-off valve 109, and the first piston 104 pushes the lubricating oil to be filtered by the fine filter 105 according to the working principle of embodiment 1. The lubricant oil which is finely filtered is pushed into the upper cavity 107 by the first piston 104, and the emulsified water and the free water in the lubricant oil are absorbed by the water absorption filter 205 under the action of the high-pressure vacuum pump 302 after being evaporated. At this time, the controller 110 closes the second on-off valve 108, opens the third on-off valve 109, closes the fourth on-off valve 303, switches the solenoid valve 301 so that the port a communicates with the port T and the port B communicates with the port P, and opens the high-pressure vacuum pump 302. At this time, the high pressure vacuum pump 302 draws air from the upper side of the second piston 203 in the filter cylinder body to discharge the air into the upper cavity 107, and since the second on-off valve 108 is closed, the fourth on-off valve 303 is closed, and the third on-off valve 109 is opened, the lubricating fluid after being finely filtered and dewatered flows out of the upper cavity 107 through the third on-off valve 109 under the action of air pressure, thereby oiling the chassis.
The pneumatic lubricating oil recycling equipment provided by the invention can be used for continuously carrying out rough filtration and fine filtration on lubricating oil, reducing the filtration time and improving the filtration efficiency. And the water in the lubricating oil can be effectively removed by arranging the high-pressure vacuum pump 302 and the water absorption filter 205, so that the water in the lubricating oil is prevented from influencing the lubricating effect of the lubricating oil.
Example 3:
on the basis of embodiment 2, in order to prevent the coarse filter cylinder 201 or the fine filter cylinder 102 from being damaged by excessive air pressure, the coarse filter cylinder 201, the fine filter cylinder 102 or the high-pressure air pump is damaged.
As shown in fig. 1, the first air vent is further communicated with a first air pressure sensor 401, the third air vent is communicated with a second air pressure sensor 402, the first air pressure sensor 401 and the second air pressure sensor 402 are both electrically connected to the controller 110, the first air pressure sensor 401 and the second air pressure sensor 402 monitor air pressure signals in real time and transmit the air pressure signals to the controller 110, and the controller 110 controls the high-pressure vacuum pump 302 to operate according to the air pressure signals.
Through setting up first baroceptor 401 and second baroceptor 402, when the internal gas pressure of coarse filter cylinder body 201 or fine filtration cylinder body 102 is too big, through controller 110 self-closing high pressure air pump, in time overhaul coarse filter cylinder body or fine filtration cylinder to can prevent effectively that the high pressure from causing coarse filter cylinder body 201, fine filtration cylinder body 102 or high pressure air pump to damage.
Preferably, as shown in fig. 1, a hydraulic pressure sensor 5 is communicated with the fourth switching valve 303, the hydraulic pressure sensor 5 is electrically connected to the controller 110, the hydraulic pressure sensor 5 monitors a hydraulic pressure signal in real time and transmits the hydraulic pressure signal to the controller 110, and the controller 110 controls the third switching valve 109 to operate according to the hydraulic pressure signal. The hydraulic sensor 5 can prevent the pressure in the fine filter cylinder from being too high due to the blockage of an oil filling port of the case when the case is filled, so that the fine filter cylinder body 102 is damaged.
As a preferable scheme, as shown in fig. 1, a sealing ring is further disposed between the rough filtering cylinder 201 and the rough filtering cylinder cover 202, and a sealing ring is also disposed between the fine filtering cylinder 102 and the fine filtering cylinder cover 103. Through setting up the sealing washer, can prevent coarse rate device and essence and strain the device gas leakage.
As a preferable scheme, as shown in fig. 1 and 2, a water-absorbing filter paper 6 is further disposed in the fine filter cylinder 102. The non-vaporized free water and the free water in the lubricating oil can be effectively removed by arranging the water absorption filter paper 6.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (1)

1. A pneumatic lubricating oil recycling apparatus, comprising:
the rough filtering device is used for filtering scrap iron in lubricating oil and comprises a first oil inlet and a first oil outlet, the first oil inlet is communicated with a first switch valve (101), and is electrically connected with a controller (110), and the controller (110) is electrically connected with a power supply device;
the fine filtering device comprises a fine filtering cylinder body (102), a fine filtering cylinder cover (103), a first piston (104) and a fine filtering core (105), wherein the fine filtering cylinder cover (103) is fixedly connected with the fine filtering cylinder body (102) in a sealing mode, the fine filtering cylinder cover (103) is provided with a first vent, the fine filtering core (105) divides an inner cavity of the fine filtering cylinder body (102) into a lower cavity (106) and an upper cavity (107), a first oil outlet is communicated with the lower cavity (106), a second switch valve (108) is arranged between the first oil outlet and the lower cavity (106), the second switch valve (108) is electrically connected with the controller (110), the first piston (104) is connected with the inner wall of the lower cavity (106) in a sealing and sliding mode, a second vent is arranged at the bottom of the lower cavity (106), a second oil outlet is arranged at the bottom of the upper cavity (107), a third switch valve (109) is communicated with the second oil outlet, and the third switch valve (109) is electrically connected with the controller (110);
the vacuumizing device comprises an air suction port and an air exhaust port, and is electrically connected with the controller (110);
the coarse filtering device comprises a coarse filtering cylinder body (201), a coarse filtering cylinder cover (202), a second piston (203) and a coarse filtering core (204), a first oil inlet is formed in the side wall of the top of the coarse filtering cylinder body (201), a first oil outlet is formed in the bottom of the coarse filtering cylinder body (201), the coarse filtering cylinder cover (202) is fixedly connected with the coarse filtering cylinder body (201) in a sealing mode, a third air vent is formed in the coarse filtering cylinder cover (202), the third air vent is communicated with an air exhaust port of the vacuumizing device, an upper cavity (107) of the fine filtering cylinder body (102) is fixedly connected with a water suction filter (205), the coarse filtering core (204) is formed in the bottom of the coarse filtering cylinder body (201), and the second piston (203) is connected with the inner wall of the coarse filtering cylinder body (201) in a sealing and sliding mode;
the vacuumizing device comprises an electromagnetic valve (301) and a high-pressure vacuum pump (302), wherein a port A of the electromagnetic valve (301) is communicated with the first vent, a port P of the electromagnetic valve (301) is communicated with the vacuumizing port of the high-pressure vacuum pump (302), an exhaust port of the high-pressure vacuum pump (302) is communicated with a port T of the electromagnetic valve (301), a port B of the electromagnetic valve (301) is communicated with the third vent, the electromagnetic valve (301) can be switched from the communication between the port A and the port P and the communication between the port B and the port T to the communication between the port A and the port T and the communication between the port B and the port P, the electromagnetic valve (301) and the high-pressure vacuum pump (302) are both electrically connected with the controller (110), the first vent is communicated with a fourth switch valve (303), and the third switch valve (109) and the fourth switch valve (303) are both electrically connected with the controller (110);
the third switch valve (109) is communicated with a hydraulic sensor (5), the hydraulic sensor (5) is electrically connected with the controller (110), the hydraulic sensor (5) monitors a hydraulic signal in real time and transmits the hydraulic signal to the controller (110), and the controller (110) controls the third switch valve (109) to act according to the hydraulic signal;
a sealing ring is also arranged between the rough filtering cylinder body (201) and the rough filtering cylinder cover (202), and a sealing ring is also arranged between the fine filtering cylinder body (102) and the fine filtering cylinder cover (103);
and water absorption filter paper (6) is also arranged in the fine filter cylinder body (102).
CN202110430873.6A 2021-04-21 2021-04-21 Pneumatic type lubricating oil recycling equipment Active CN112877127B (en)

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CN112877127B true CN112877127B (en) 2022-12-09

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CN203971469U (en) * 2014-07-01 2014-12-03 长沙业嘉电子科技有限公司 Dissolved Gases in Insulating Oil bellows vacuum degasser
CN106621529A (en) * 2017-03-02 2017-05-10 龙岩市海特叉车有限公司 Centrifugal automatic oil liquid filtering and circulating device
CN209020007U (en) * 2018-11-05 2019-06-25 华北理工大学 A tap water purification device for household life

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