CN103670589A - Oil pumping unit - Google Patents
Oil pumping unit Download PDFInfo
- Publication number
- CN103670589A CN103670589A CN201410004360.9A CN201410004360A CN103670589A CN 103670589 A CN103670589 A CN 103670589A CN 201410004360 A CN201410004360 A CN 201410004360A CN 103670589 A CN103670589 A CN 103670589A
- Authority
- CN
- China
- Prior art keywords
- oil
- pipe
- deep fat
- valve
- solenoid valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000005086 pumping Methods 0.000 title claims abstract description 22
- 230000007246 mechanism Effects 0.000 claims abstract description 17
- 239000000446 fuel Substances 0.000 claims description 28
- 238000010438 heat treatment Methods 0.000 claims description 28
- 238000011109 contamination Methods 0.000 claims description 6
- 239000010865 sewage Substances 0.000 claims description 6
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 abstract description 78
- 239000010721 machine oil Substances 0.000 abstract description 14
- 239000007921 spray Substances 0.000 abstract description 3
- 235000015927 pasta Nutrition 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000010913 used oil Substances 0.000 description 3
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
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- Feeding And Controlling Fuel (AREA)
Abstract
一种抽油机，具有底托架、接油盆、1号电磁阀、2号电磁阀、抽油枪、储油箱和热油箱；接油盆由两升降机构支撑并带动升降；接油盆的底部出油分成两路，一路通过回油管和热油箱连接，一路通过放油管和储油箱连接，1号电磁阀的第一阀口连接一气源接头，1号电磁阀的第二阀口和真空发生器连接，真空发生器和储油箱连接，1号电磁阀的第三阀口通过充气管和热油箱连接；2号电磁阀的第一阀口通过抽油管和抽油枪连接，2号电磁阀的第二阀口通过输油管和储油箱连接，2号电磁阀的第三阀口通过热油管和热油箱连接。本发明能在机油过分粘稠或凝固的状态下通过抽油枪喷出热油或热气，把机油稀释后再进行抽吸，达到很好的抽吸效果。
A pumping unit has a bottom bracket, an oil receiving basin, a No. 1 solenoid valve, a No. 2 solenoid valve, an oil suction gun, an oil storage tank, and a hot oil tank; the oil receiving basin is supported by two lifting mechanisms and driven to lift; the oil receiving basin The bottom oil outlet is divided into two paths, one path is connected to the hot oil tank through the oil return pipe, and the other path is connected to the oil storage tank through the oil discharge pipe. The first valve port of the No. 1 solenoid valve is connected to an air source connector, and the second valve port of the No. 1 solenoid valve It is connected with the vacuum generator, the vacuum generator is connected with the oil storage tank, the third valve port of the No. 1 solenoid valve is connected with the hot oil tank through the gas charging pipe; the first valve port of the No. 2 solenoid valve is connected with the oil suction gun through the oil suction pipe, and the 2 The second valve port of the No. 2 solenoid valve is connected with the oil storage tank through the oil delivery pipe, and the third valve port of the No. 2 solenoid valve is connected with the hot oil tank through the hot oil pipe. The invention can spray hot oil or hot gas through an oil suction gun when the machine oil is too viscous or solidified, dilute the machine oil and then carry out suction, so as to achieve a good suction effect.
Description
Technical field
The present invention relates to pumping unit, the motor that is particularly suitable for throwing aside is for a long time disassembled use.
Background technique
the pumping unit of extensive use at present, is mainly negative pressure of vacuum oil pumping and electric oil pump oil pumping two large classes.In using process, in the situation that running into the undue thickness of machine oil or motor and throwing aside for a long time and cause machine oil to solidify, because the suction of general oil drawing gun is limited, or the pipeline of oil drawing gun is blocked, pumping unit does not reach the effect that machine oil is fully exhausted, so general pumping unit is not suitable for the machine oil of undue thickness or the state that solidifies to aspirate.
Summary of the invention
The object of the invention is to propose a kind of pumping unit that can use under the undue thickness of machine oil or the state solidifying.
For achieving the above object, the present invention takes following technological scheme: the present invention has bottom bracket, connects oil tray, No. 1 solenoid valve, No. 2 solenoid valves, oil drawing guns and be placed in fuel reserve tank and the deep fat case on bottom bracket; The both sides that connect oil tray are respectively equipped with elevator mechanism, elevator mechanism comprises No. 1 connecting rod, No. 2 connecting rods, No. 3 connecting rods, strut, strut is fixed on fuel reserve tank, the lower end of No. 1 connecting rod and the upper end of strut is hinged, the upper end of the upper end of No. 2 connecting rods and No. 1 connecting rod is hinged, the lower end of the upper end of No. 3 connecting rods and No. 2 connecting rods is hinged, the lower end of No. 3 connecting rods is hinged on the middle part of strut, connect oil tray one side and be provided with mounting plate, connect oil tray and be connected between No. 2 connecting rods of two elevator mechanisms by mounting plate, connect oil tray and support and drive lifting by two elevator mechanisms; The fuel-displaced two-way that is divided in bottom that connects oil tray, the return tube of leading up to is connected with deep fat case, and the drain line of leading up to is connected with fuel reserve tank, is respectively equipped with No. 1 switch valve and No. 2 switch valves on return tube and drain line; The first valve port of described No. 1 solenoid valve connects a gas source connector, and the second valve port of No. 1 solenoid valve is connected with vacuum generator, and vacuum generator is connected with fuel reserve tank, and the 3rd valve port of No. 1 solenoid valve is connected with deep fat case by gas tube; The first valve port of described No. 2 solenoid valves is connected with oil drawing gun by oil pick-up tube, and the second valve port of No. 2 solenoid valves is connected with fuel reserve tank by transport pipe, and the 3rd valve port of No. 2 solenoid valves is connected with deep fat case by deep fat pipe.
The described oil tray that connects has locking framework, locking framework comprises and is fixed on fuel reserve tank end face in the locking circle between two struts and is connected to the positioning plate between No. 3 connecting rods of two elevator mechanisms, positioning plate is attached to locking circle above and the arc shaped surface that can enclose along locking moves, locking circle is provided with some locking apertures, in the middle of positioning plate, corresponding locking circle is provided with positioning hole, by the positioning hole on a moving latch, is inserted to and in the corresponding locking aperture on locking circle, is made to connect oil tray and be locked on certain height.
In described deep fat case, be provided with U-shaped air heating pipe, between gas tube and air heating pipe, by one-way valve, connected.
Bottom in described deep fat case arranges heating stick and temperature transducer, the top of the position in the hole that on deep fat case tank wall, heat supply oil pipe inserts in heating stick and temperature transducer.
The bottom of bottom bracket is provided with four rolling.
The bottom surface of fuel reserve tank is provided with sewage draining exit, is connected with drain pipe on sewage draining exit, and drain pipe is provided with blowdown valve, at fuel reserve tank lower box, is provided with the window of removing contamination, and removable cover plate is installed on the window of removing contamination.
On the air outlet of air heating pipe, be connected with air-strainer.
On the mouth of pipe of one end of return tube and deep fat pipe insertion deep fat case, be equipped with oil strainer.
The present invention has following good effect: 1. the present invention can use as general pumping unit, can under the undue thickness of machine oil or the state solidifying, by oil drawing gun, spray deep fat or hot gas again, aspirating after oil dilution, reaches good suction effect again.2. the oil tray lifting that connects of the present invention, has met and under different heights, has connect oily needs, because elevator mechanism is bar linkage structure, simple in structure and easy to operate.3. the top of the position in the hole that on deep fat case tank wall, heat supply oil pipe inserts in heating stick, can guarantee that electrical bar is positioned under pasta, can not cause dry heating and burns out electrical bar; When gas enters the air heating pipe of deep fat case by gas tube in, be heated, oil drawing gun blows out hot gas.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is the right elevation of Fig. 1.
Fig. 4 is the sectional view of Fig. 1.
Fig. 5 is the I portion enlarged view of Fig. 1.
Embodiment
Fig. 1 to Fig. 5, the present embodiment has bottom bracket 1, connects 7, No. 1 solenoid valve of oil tray 14, No. 2 solenoid valves 18, oil drawing guns 19 and be placed in fuel reserve tank 2, deep fat case 3 and the control box 4 on bottom bracket 1.
The bottom of bottom bracket 1 is provided with four rolling 1-1.The bottom surface of fuel reserve tank 2 is provided with sewage draining exit, is connected with drain pipe 25 on sewage draining exit, and drain pipe 25 is provided with blowdown valve 26, at fuel reserve tank 2 lower box, is provided with the window of removing contamination, and removable cover plate 2-4 is installed on the window of removing contamination.One sidewall of fuel reserve tank 2 is provided with oil ga(u)ge 2-1.The top of another sidewall is provided with handrail 2-2.The end face of deep fat case 3 is provided with depressimeter 2-3.The end face of control box 4 is provided with pressure switch 4-1, and the sidewall of control box 4 is provided with throw over switch 4-2, thermometer 4-3.Connect oil tray 7 the insides and be provided with detachable filter screen 7-2.
The both sides that connect oil tray 7 are respectively provided with elevator mechanism 6, and elevator mechanism 6 comprises No. 1 connecting rod 6-1, No. 2 connecting rod 6-2, No. 3 connecting rod 6-3, strut 6-4.Strut 6-4 is fixed on fuel reserve tank 2, hinged by passing through bearing pin between hinged, the upper end of No. 2 connecting rod 6-2 of bearing pin and the upper end of No. 1 connecting rod 6-1 between the upper end of the lower end of No. 1 connecting rod 6-1 and strut 6-4, hinged by bearing pin between the upper end of No. 3 6-3 of company bars and the lower end of No. 2 connecting rod 6-2, the lower end of No. 3 connecting rod 6-3 is hinged on by bearing pin on the position, middle part of strut 6-4, the below of the articulating point of the articulating point between strut 6-4 and No. 1 connecting rod 6-1 between No. 2 connecting rod 6-2 and No. 3 connecting rod 6-3.Connect oil tray 7 one sides and be provided with mounting plate 7-1, connect oil tray 7 and by mounting plate 7-1, be connected between No. 2 connecting rod 6-2 of two elevator mechanisms 6, by two No. 2 connecting rod 6-2, supported to connect oil tray 7 and drive connecing oil tray 7 liftings.At elevator mechanism 6, drive and connect in oil tray 7 lifting process, it is motionless that strut 6-4 keeps, and No. 1 connecting rod 6-1 and No. 3 connecting rod 6-3 can drop to the ground, and No. 2 connecting rod 6-2 remain vertical, connect oil tray 7 and be fixed between two No. 2 connecting rod 6-2, connect like this oil tray 7 and remain plumbness.
The described oil tray 7 that connects has locking framework 5, locking framework 5 comprises and being fixed on fuel reserve tank 2 end faces and in the locking circle 5-1 between two strut 6-4 be connected to the positioning plate 5-2 between No. 3 connecting rod 6-3 of two elevator mechanisms 6, the arc shaped surface that the middle part of positioning plate 5-2 is attached to locking circle 5-1 above and energy encloses 5-1 along locking moves, every locking circle 5-1 is provided with some locking aperture 5-1-1, on accompanying drawing, be four locking apertures, there are four position locations, the upper corresponding locking circle 5-1 of positioning plate 5-2 is provided with positioning hole, by a moving latch 5-3, by the positioning hole on positioning plate 5-2, be inserted to and in the corresponding locking aperture on locking circle 5-1, make to connect oil tray 7 and be locked on certain height.
The oil outlet connecing on the bottom surface of oil tray 7 is connected with tee union 8, use oil content and become two-way, one hole of tee union 8 is connected with deep fat case 3 by return tube 10, and a hole is connected with fuel reserve tank 2 by drain line 12, is respectively equipped with No. 1 switch valve 9 and No. 2 switch valves 11 on return tube 10 and drain line 12.
The first valve port of described No. 1 solenoid valve 14 connects a gas source connector 15, the second valve port of No. 1 solenoid valve 14 is connected with vacuum generator 16, vacuum generator 16 is connected with fuel reserve tank 2, on vacuum generator 16, be connected with baffler 16-1, the 3rd valve port of No. 1 solenoid valve 14 is connected with deep fat case 3 by gas tube 17, in described deep fat case 3, be provided with the air heating pipe 22 of U-shaped, between gas tube 17 and air heating pipe 22, by one-way valve 27, connected, the top of the outlet side of air heating pipe 22 in pasta.The first valve port of described No. 2 solenoid valves 18 is connected with oil drawing gun 19 by oil pick-up tube 20, the second valve port of No. 2 solenoid valves 18 is connected with fuel reserve tank 2 by transport pipe 21, the 3rd valve port of No. 2 solenoid valves 18 is connected with deep fat case 3 by deep fat pipe 13, and deep fat pipe 13 is provided with switch valve 30 No. 3.
Bottom in described deep fat case 3 arranges heating stick 23 and the temperature transducer 24 in heating stick 23 tops, the top of the position of the patchhole 3-1 of heat supply oil pipe 13 in heating stick 23 and temperature transducer 24 on deep fat case 3 tank walls.Guarantee heating stick 23 can not expose the dry heating of pasta and damage.
On the mouth of pipe of giving vent to anger of air heating pipe 22, be connected with air-strainer 28.On the mouth of pipe of one end of return tube 10 insertion deep fat casees 3 and on the mouth of pipe of one end of deep fat pipe 13 insertion deep fat casees 3, be equipped with oil strainer 29.
During oil pumping, throw over switch 4-2 is placed in " oil pumping " position, and No. 1 solenoid valve 14 must not be electric, and gas source connector 15 is connected with vacuum generator 16, can vacuumize fuel reserve tank 2, and depressimeter 2-3 can reflect negative pressure value.No. 2 solenoid valve 18 also must not be electric, and fuel reserve tank 2 communicates by transport pipe 21 and oil pick-up tube 20, now can use oil drawing gun 19 to carry out oil suction.
If during the machine oil that runs into thickness or solidify, normal oil pumping can not be carried out, need to use deep fat to oil dilution, melting, now throw over switch 4-2 can be placed in to " heating " position, No. 1 solenoid valve 14 obtains electric, gas source connector 15 is connected with gas tube 17, by gas tube 17 and 22 pairs of deep fat case 3 internal pressurization of air heating pipe, simultaneously No. 2 solenoid valves 18 also electric, deep fat pipe 13 and oil pick-up tube 20 communicate, now can use 19 pairs of machine oil of oil drawing gun to spray rare machine oil of uniform temperature, the machine oil that impels thickness or solidify melts and oil-tank bottom is cleaned, pump again.
When pasta lower than deep fat case 3 tank walls on during the position of the hole 3-1 that inserts of heat supply oil pipe 13, the gas that gas tube 17 injects is that the air heating pipe 22 immersing in deep fat by part enters deep fat pipe 13, this is the hot air flow of oil drawing gun 19 ejections, also can melt thickness or the machine oil solidifying.
When deep fat case 3 the inside pressure are got back to normal pressure by the time, can the used oil that connect 7 li of oil trays is supplementary by the machine oil of tee union 8, the 1st switch valve 9,10 pairs of heating fuel tank 3 the insides of return tube, realize used oil recycling.The used oil that connects 7 li of oil trays also can be stored in fuel reserve tank 2 by tee union 8, the 2nd switch valve 11, drain line 12.
The temperature transducer 24 that the pressure switch 4-1 of the outer installment of deep fat case 3, the inside arrange is all in order to protect deep fat case 3; when pressure is excessive or all can automatically cut off the power supply of heating stick 23 during excess Temperature; and pressure and temperature is during lower than setting value, also can automatically recover the power supply to heating stick 23.
Claims (8)
1. a pumping unit, is characterized in that: have bottom bracket (1), connect oil tray (7), No. 1 solenoid valve (14), No. 2 solenoid valves (18), oil drawing gun (19) and be placed in fuel reserve tank (2) and the deep fat case (3) on bottom bracket (1), the both sides that connect oil tray (7) are respectively equipped with elevator mechanism (6), elevator mechanism (6) comprises No. 1 connecting rod (6-1), No. 2 connecting rods (6-2), No. 3 connecting rods (6-3), strut (6-4), strut (6-4) is fixed on fuel reserve tank (2), the upper end of the lower end of No. 1 connecting rod (6-1) and strut (6-4) is hinged, the upper end of the upper end of No. 2 connecting rods (6-2) and No. 1 connecting rod (6-1) is hinged, the upper end of No. 3 companies (6-3) bar and the lower end of No. 2 connecting rods (6-2) are hinged, the lower end of No. 3 connecting rods (6-3) is hinged on the middle part of strut (6-4), connect oil tray (7) one sides and be provided with mounting plate (7-1), connecing oil tray (7) is connected between No. 2 connecting rods (6-2) of two elevator mechanisms (6) by mounting plate (7-1), connect oil tray (7) and support and drive lifting by two elevator mechanisms (6), connect the fuel-displaced two-way that is divided in bottom of oil tray (7), the return tube (10) of leading up to is connected with deep fat case (3), the drain line (12) of leading up to is connected with fuel reserve tank (2), is respectively equipped with No. 1 switch valve (9) and No. 2 switch valves (11) on return tube (10) and drain line (12), the first valve port of described No. 1 solenoid valve (14) connects a gas source connector (15), the second valve port of No. 1 solenoid valve (14) is connected with vacuum generator (16), vacuum generator (16) is connected with fuel reserve tank (2), and the 3rd valve port of No. 1 solenoid valve (14) is connected with deep fat case (3) by gas tube (17), the first valve port of described No. 2 solenoid valves (18) is connected with oil drawing gun (19) by oil pick-up tube (20), the second valve port of No. 2 solenoid valves (18) is connected with fuel reserve tank (2) by transport pipe (21), and the 3rd valve port of No. 2 solenoid valves (18) is connected with deep fat case (3) by deep fat pipe (13).
2. pumping unit according to claim 1, it is characterized in that: described in connect oil tray (7) and there is locking framework (5), locking framework (5) comprises and is fixed on fuel reserve tank (2) end face in the locking circle (5-1) between two struts (6-4) and is connected to the positioning plate (5-2) between No. 3 connecting rods (6-3) of two elevator mechanisms (6), the arc shaped surface that positioning plate (5-2) is attached to locking circle (5-1) above and energy encloses (5-1) along locking moves, locking circle (5-1) is provided with some locking apertures (5-1-1), in the middle of positioning plate (5-2), corresponding locking circle (5-1) is provided with positioning hole, by a moving latch, (5-3 is inserted to and in the corresponding locking aperture on locking circle (5-1), is made to connect oil tray (7) and be locked on certain height by the positioning hole on positioning plate (5-2).
3. pumping unit according to claim 1, is characterized in that: in described deep fat case (3), be provided with U-shaped air heating pipe (22), between gas tube (17) and air heating pipe (22), by one-way valve (27), connected.
4. pumping unit according to claim 1, it is characterized in that: the bottom in described deep fat case (3) arranges heating stick (23) and temperature transducer (24) top of the position in the hole (3-1) that on deep fat case (3) tank wall, heat supply oil pipe (13) inserts in heating stick (23) and temperature transducer (24).
5. pumping unit according to claim 1, is characterized in that: the bottom of bottom bracket (1) is provided with four rolling (1-1).
6. pumping unit according to claim 1, it is characterized in that: the bottom surface of fuel reserve tank (2) is provided with sewage draining exit, on sewage draining exit, be connected with drain pipe (25), drain pipe (25) is provided with blowdown valve (26), at fuel reserve tank (2) lower box, be provided with the window of removing contamination, removable cover plate (2-4) is installed on the window of removing contamination.
7. pumping unit according to claim 1, is characterized in that: on the air outlet of air heating pipe (22), be connected with air-strainer (28).
8. pumping unit according to claim 1, is characterized in that: on the mouth of pipe of one end of return tube (10) and deep fat pipe (13) insertion deep fat case (3), be equipped with oil strainer (29).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410004360.9A CN103670589B (en) | 2014-01-06 | 2014-01-06 | Oil pumping unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410004360.9A CN103670589B (en) | 2014-01-06 | 2014-01-06 | Oil pumping unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103670589A true CN103670589A (en) | 2014-03-26 |
| CN103670589B CN103670589B (en) | 2015-12-23 |
Family
ID=50309254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410004360.9A Expired - Fee Related CN103670589B (en) | 2014-01-06 | 2014-01-06 | Oil pumping unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103670589B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017114212A1 (en) * | 2015-12-30 | 2017-07-06 | 陈阿扣 | Oil pumping maching |
| KR20250055753A (en) * | 2023-10-18 | 2025-04-25 | 동의대학교 산학협력단 | Oil drain tool that can minimize residual oil |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2554389A (en) * | 1945-10-30 | 1951-05-22 | Pete Parthemos | Crankcase cleaner |
| US5816272A (en) * | 1995-12-11 | 1998-10-06 | Leaphart; Dwight | Apparatus for cleaning an oil strainer and pan |
| US6318388B1 (en) * | 2000-01-07 | 2001-11-20 | Donald C. Edmiston | Engine flushing apparatus |
| CN203285512U (en) * | 2013-04-19 | 2013-11-13 | 顾顺生 | Oil-filling and oil-pumping integrated machine |
| CN103440964A (en) * | 2013-09-10 | 2013-12-11 | 中国北车集团大同电力机车有限责任公司 | Equipment for vacuum oil pumping, vacuum oil injecting and leak test after oil injection |
| CN203347885U (en) * | 2013-07-07 | 2013-12-18 | 胡昌容 | Manual engine oil pumping unit for automobiles |
| CN203699880U (en) * | 2014-01-06 | 2014-07-09 | 江苏理工学院 | Oil pumping machine |
-
2014
- 2014-01-06 CN CN201410004360.9A patent/CN103670589B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2554389A (en) * | 1945-10-30 | 1951-05-22 | Pete Parthemos | Crankcase cleaner |
| US5816272A (en) * | 1995-12-11 | 1998-10-06 | Leaphart; Dwight | Apparatus for cleaning an oil strainer and pan |
| US6318388B1 (en) * | 2000-01-07 | 2001-11-20 | Donald C. Edmiston | Engine flushing apparatus |
| CN203285512U (en) * | 2013-04-19 | 2013-11-13 | 顾顺生 | Oil-filling and oil-pumping integrated machine |
| CN203347885U (en) * | 2013-07-07 | 2013-12-18 | 胡昌容 | Manual engine oil pumping unit for automobiles |
| CN103440964A (en) * | 2013-09-10 | 2013-12-11 | 中国北车集团大同电力机车有限责任公司 | Equipment for vacuum oil pumping, vacuum oil injecting and leak test after oil injection |
| CN203699880U (en) * | 2014-01-06 | 2014-07-09 | 江苏理工学院 | Oil pumping machine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017114212A1 (en) * | 2015-12-30 | 2017-07-06 | 陈阿扣 | Oil pumping maching |
| KR20250055753A (en) * | 2023-10-18 | 2025-04-25 | 동의대학교 산학협력단 | Oil drain tool that can minimize residual oil |
| KR102841544B1 (en) * | 2023-10-18 | 2025-07-31 | 동의대학교 산학협력단 | Oil drain tool that can minimize residual oil |
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| Publication number | Publication date |
|---|---|
| CN103670589B (en) | 2015-12-23 |
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