CN116856906A - Compact oil metering device - Google Patents
Compact oil metering device Download PDFInfo
- Publication number
- CN116856906A CN116856906A CN202310825088.XA CN202310825088A CN116856906A CN 116856906 A CN116856906 A CN 116856906A CN 202310825088 A CN202310825088 A CN 202310825088A CN 116856906 A CN116856906 A CN 116856906A
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- Prior art keywords
- fixedly connected
- box body
- compact oil
- plate
- wall
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- 239000007788 liquid Substances 0.000 claims abstract description 56
- 230000007246 mechanism Effects 0.000 claims abstract description 24
- 238000001914 filtration Methods 0.000 claims abstract description 15
- 230000001105 regulatory effect Effects 0.000 claims abstract description 13
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 238000007599 discharging Methods 0.000 claims description 28
- 238000007789 sealing Methods 0.000 abstract description 22
- 230000009471 action Effects 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 7
- 230000001276 controlling effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/001—Filters in combination with devices for the removal of gas, air purge systems
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/086—Screens with preformed openings, e.g. slotted liners
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Geophysics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention provides a compact oil metering device, and relates to the technical field of metering devices. The compact oil metering device comprises a box body, a filtering mechanism and a regulating mechanism, wherein the upper side of the inner wall of the box body is fixedly connected with a flow expansion plate, the inner wall of the box body is fixedly connected with a guide plate which is positioned at the lower side of the flow expansion plate, the middle part of the guide plate is fixedly connected with a defoaming net, the middle part of the box body is fixedly connected with a storage box which is positioned below the guide plate, and a lower liquid pipe is arranged at the bottom of the storage box in a penetrating manner. According to the invention, the regulating and controlling mechanism is arranged, and the sealing plate is driven to reciprocate under the driving action of the driving motor, so that the intermittent downflow effect of the compact oil is realized, the compact oil is convenient to take, and the rotating speed of the driving motor can be regulated, so that the downflow quantity of each time can be regulated and controlled.
Description
Technical Field
The invention relates to the technical field of metering devices, in particular to a compact oil metering device.
Background
Compact oil refers to the accumulation of petroleum, which is a non-conventional petroleum resource, in a compact reservoir sandwiched between or in close proximity to a high quality oil producing layer without extensive long distance migration. In the process of using the compact oil, the use amount of the oil also needs to be regulated and calculated.
The applicant has found that, when applying for the invention, the chinese patent discloses a "compact oil metering device", the application number of which is "20160404426. X", the applicant mainly sets up a large-flow liquid outlet pipe and a small-flow liquid outlet pipe on the desanding separator, which correspond to the large-flow metering process and the small-flow metering process respectively, and selects and meters the large-flow metering process and the small-flow metering process according to different conditions of oil well liquid production, so that metering work of oil well liquid production can be completed without a large-capacity container, thereby reducing cost of compact oil exploitation and improving benefit of compact oil exploitation;
but the device can't regulate and control and calculate the volume of taking of dense oil in the use, leads to when using, can't control the volume of taking on the one hand, and on the other hand can't carry out intermittent type nature and take, leads to when taking intermittently, needs not to break the switch valve, uses inconveniently.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides a compact oil metering device, which solves the problem that intermittent taking cannot be performed.
(II) technical scheme
In order to achieve the above purpose, the invention is realized by the following technical scheme: the compact oil metering device comprises a box body, a filtering mechanism and a regulating mechanism, wherein a flow expansion plate is fixedly connected to the upper side of the inner wall of the box body, a guide plate is fixedly connected to the inner wall of the box body and positioned on the lower side of the flow expansion plate, a defoaming net is fixedly connected to the middle of the guide plate, a storage box is fixedly connected to the middle of the box body and positioned below the guide plate, and a liquid discharging pipe is arranged at the bottom of the storage box in a penetrating manner;
the regulating mechanism comprises a connecting frame, the connecting frame is fixedly connected to the middle part of the inner bottom wall of the box body, a driving motor is arranged on the left side of the inside of the connecting frame, the output end of the driving motor is fixedly connected with a motor shaft and the outer end of the motor shaft is fixedly connected with a rotary table, the outer surface of the rotary table is rotationally connected with a rotary rod, the right end of the rotary rod is rotationally connected with a sliding plate, the right side of the sliding plate is fixedly connected with a sliding rod, the right end of the sliding rod is fixedly connected with a sealing plate, and the bottom end of a liquid discharging pipe is abutted to the sealing plate.
Preferably, the filtering mechanism comprises an oil inlet barrel, the oil inlet barrel is fixedly penetrated in the middle of the upper surface of the box body, a filter screen is arranged in the oil inlet barrel, connecting rods are fixedly connected to two sides of the upper surface of the filter screen, and grooves matched with the connecting rods are formed in two sides of the upper surface of the oil inlet barrel.
Preferably, the flow expansion plate is obliquely arranged on the inner wall of the box body.
Preferably, the inner wall of the storage tank is provided with a liquid level gauge.
Preferably, a chute is formed in the upper surface of the sealing plate, a circulation port is formed in the middle of the chute, and the caliber of the circulation port is consistent with that of the liquid discharging pipe.
Preferably, a liquid discharge pipe penetrates through the right side of the inner bottom wall of the connecting frame, the upper end of the liquid discharge pipe is fixedly connected with a funnel, and the bottom end of the liquid discharge pipe penetrates to the outside of the box body.
Preferably, the bottom four corners of box all fixedly connected with supporting leg.
Preferably, the bottom ends of the supporting legs are provided with anti-slip pads.
(III) beneficial effects
The invention provides a compact oil metering device. The beneficial effects are as follows:
1. the device comprises a rotary table, a sliding plate, a sealing plate, a liquid discharging pipe, a circulating port, a regulating mechanism, a driving motor, a rotary table, a sliding plate and a sealing plate, wherein the rotary table is driven to rotate under the driving action of the driving motor, the sliding plate and the sliding rod are driven to reciprocate left and right under the connecting action of the rotary table, the sealing plate is driven to reciprocate left, the liquid discharging pipe is staggered with the circulating port when the sealing plate moves left, the liquid discharging pipe does not circulate, the liquid discharging pipe is communicated with the circulating port when the sealing plate returns, and compact oil in the liquid discharging pipe flows down; when the closing plate moves to the right, the liquid pipe staggers with the circulation mouth down, and liquid pipe does not circulate down at this time, and when the closing plate was replied, liquid pipe and circulation mouth intercommunication down, the intraductal dense oil of liquid down flows down at this time, can realize the intermittent type nature effect that flows down of dense oil, conveniently takes, and secondly, the accessible is adjusted driving motor's rotational speed, and then can regulate and control the volume of flowing down at every turn.
2. The filter mechanism is arranged, so that the adopted compact oil can be filtered on one hand, the quality of products is guaranteed, and the filter screen can be replaced on the other hand, so that the blocking phenomenon caused by long-time filtration is avoided.
3. Be provided with the leading plate and remove the bubble net, can carry out defoaming treatment to dense oil, avoid causing the inaccuracy of quantity because of the existence of bubble.
Drawings
FIG. 1 is a schematic cross-sectional view of a tank of the present invention;
FIG. 2 is an enlarged schematic view of the structure of FIG. 1A according to the present invention;
FIG. 3 is a schematic side view of a turntable according to the present invention;
FIG. 4 is a schematic view of a seal plate structure according to the present invention;
FIG. 5 is a schematic cross-sectional view of a filtration mechanism of the present invention;
fig. 6 is an enlarged schematic view of the structure at B in fig. 5 according to the present invention.
Wherein, 1, the box body; 2. a filtering mechanism; 3. a regulating mechanism; 4. a flow expansion plate; 5. a leading plate; 6. a defoaming net; 7. a storage tank; 8. a liquid level gauge; 9. a liquid discharging pipe; 10. a funnel; 11. a liquid discharge pipe; 12. support legs;
21. an oil inlet barrel; 22. a connecting rod; 23. a filter screen; 24. a groove is formed;
31. a connection frame; 32. a driving motor; 33. a turntable; 34. a rotating lever; 35. a slide plate; 36. a slide bar; 37. a sealing plate; 38. a chute; 39. a flow port.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one:
as shown in fig. 1-4, an embodiment of the present invention provides a compact oil metering device, which includes a box 1, a filtering mechanism 2 and a regulating mechanism 3, wherein the filtering mechanism 2 is used for filtering the adopted compact oil, and the compact oil metering device can be reasonably selected according to the prior art to achieve the filtering effect, and is not described herein.
The inner wall upside fixedly connected with of box 1 expands the flow board 4, expand the flow board 4 slope and set up in the inner wall of box 1, it is used for expanding compact oil, increase mobility, the inner wall of box 1 just is located the downside fixedly connected with guide plate 5 that expands the flow board 4, the middle part fixedly connected with defoaming net 6 of guide plate 5, it is used for carrying out defoaming treatment to compact oil, avoid causing the inaccuracy of quantity because of the existence of bubble, the middle part of box 1 just be located the below fixedly connected with bin 7 of guide plate 5, be used for temporary storage the compact oil of adoption, the inner wall of bin 7 is provided with the level gauge 8, be used for running through the bottom of bin 7 and be provided with down liquid pipe 9, be used for the downflow of compact oil.
The regulation and control mechanism 3 includes connecting frame 31, connecting frame 31 fixed connection is in the interior bottom wall middle part of box 1, the inside left side of connecting frame 31 is provided with driving motor 32, driving motor 32's output fixedly connected with motor shaft and the outer end fixedly connected with carousel 33 of motor shaft, carousel 33's surface rotation is connected with dwang 34, the right-hand member rotation of dwang 34 is connected with slide plate 35, this slide plate 35 and connecting frame 31's inner wall sliding connection, slide plate 35's right side surface fixedly connected with slide bar 36, slide plate 36's right-hand member fixedly connected with closing plate 37, spout 38 has been seted up to closing plate 37's upper surface, spout 38's middle part has been seted up circulation mouth 39, the bore of circulation mouth 39 and drain pipe 9 is unanimous, the bottom of drain pipe 9 is contradicted with closing plate 37.
In the above structure, the turntable 33 is driven to rotate by the driving action of the driving motor 32, the sliding plate 35 and the sliding rod 36 are driven to reciprocate left and right under the connection action of the rotating rod 34, so as to drive the sealing plate 37 to reciprocate, when the sealing plate 37 moves left, the liquid discharging pipe 9 is staggered from the circulation port 39, the liquid discharging pipe 9 does not circulate at this time, when the sealing plate 37 returns, the liquid discharging pipe 9 is communicated with the circulation port 39, and at this time, dense oil in the liquid discharging pipe 9 flows down; when closing plate 37 moves to the right, down liquid pipe 9 staggers with the circulation mouth 39, and down liquid pipe 9 does not circulate this moment, and when closing plate 37 resumes, down liquid pipe 9 and circulation mouth 39 intercommunication, the dense oil downflow in the down liquid pipe 9 this moment can realize the intermittent type nature downflow effect of dense oil, and the convenience is taken, and secondly, the accessible is adjusted driving motor 32's rotational speed, and then can regulate and control the volume of downflow at every turn.
The drain pipe 11 is penetrated and arranged on the right side of the inner bottom wall of the connecting frame 31, the funnel 10 is fixedly connected with the upper end of the drain pipe 11, and the bottom end of the drain pipe 11 penetrates to the outside of the box body 1 for discharging compact oil.
The bottom four corners of box 1 all fixedly connected with supporting leg 12, and the bottom of supporting leg 12 is provided with the slipmat, plays the supporting role of box 1.
Embodiment two:
as shown in fig. 1 to 6, an embodiment of the present invention provides a compact oil metering device, which includes a case 1, a filtering mechanism 2, and a regulating mechanism 3.
The filtering mechanism 2 comprises an oil inlet barrel 21, the oil inlet barrel 21 fixedly penetrates through the middle of the upper surface of the box body 1, a filter screen 23 is arranged in the oil inlet barrel 21 and used for filtering and impurity removing of adopted compact oil, connecting rods 22 are fixedly connected to two sides of the upper surface of the filter screen 23, grooves 24 matched with the connecting rods 22 are formed in two sides of the upper surface of the oil inlet barrel 21, and the grooves 24 can overlap the upper ends of the connecting rods 22 and are convenient to replace.
Above-mentioned structure, this filter equipment 2 can filter the dense oil that adopts on the one hand, guarantees the quality of product, and on the other hand can change filter screen 23, avoids the jam phenomenon that long-time filtration caused.
The inner wall upside fixedly connected with of box 1 expands the flow board 4, expand the flow board 4 slope and set up in the inner wall of box 1, it is used for expanding compact oil, increase mobility, the inner wall of box 1 just is located the downside fixedly connected with guide plate 5 that expands the flow board 4, the middle part fixedly connected with defoaming net 6 of guide plate 5, it is used for carrying out defoaming treatment to compact oil, avoid causing the inaccuracy of quantity because of the existence of bubble, the middle part of box 1 just be located the below fixedly connected with bin 7 of guide plate 5, be used for temporary storage the compact oil of adoption, the inner wall of bin 7 is provided with the level gauge 8, be used for running through the bottom of bin 7 and be provided with down liquid pipe 9, be used for the downflow of compact oil.
The regulation and control mechanism 3 includes connecting frame 31, connecting frame 31 fixed connection is in the interior bottom wall middle part of box 1, the inside left side of connecting frame 31 is provided with driving motor 32, driving motor 32's output fixedly connected with motor shaft and the outer end fixedly connected with carousel 33 of motor shaft, carousel 33's surface rotation is connected with dwang 34, the right-hand member rotation of dwang 34 is connected with slide plate 35, this slide plate 35 and connecting frame 31's inner wall sliding connection, slide plate 35's right side surface fixedly connected with slide bar 36, slide plate 36's right-hand member fixedly connected with closing plate 37, spout 38 has been seted up to closing plate 37's upper surface, spout 38's middle part has been seted up circulation mouth 39, the bore of circulation mouth 39 and drain pipe 9 is unanimous, the bottom of drain pipe 9 is contradicted with closing plate 37.
In the above structure, the turntable 33 is driven to rotate by the driving action of the driving motor 32, the sliding plate 35 and the sliding rod 36 are driven to reciprocate left and right under the connection action of the rotating rod 34, so as to drive the sealing plate 37 to reciprocate, when the sealing plate 37 moves left, the liquid discharging pipe 9 is staggered from the circulation port 39, the liquid discharging pipe 9 does not circulate at this time, when the sealing plate 37 returns, the liquid discharging pipe 9 is communicated with the circulation port 39, and at this time, dense oil in the liquid discharging pipe 9 flows down; when closing plate 37 moves to the right, down liquid pipe 9 staggers with the circulation mouth 39, and down liquid pipe 9 does not circulate this moment, and when closing plate 37 resumes, down liquid pipe 9 and circulation mouth 39 intercommunication, the dense oil downflow in the down liquid pipe 9 this moment can realize the intermittent type nature downflow effect of dense oil, and the convenience is taken, and secondly, the accessible is adjusted driving motor 32's rotational speed, and then can regulate and control the volume of downflow at every turn.
The drain pipe 11 is penetrated and arranged on the right side of the inner bottom wall of the connecting frame 31, the funnel 10 is fixedly connected with the upper end of the drain pipe 11, and the bottom end of the drain pipe 11 penetrates to the outside of the box body 1 for discharging compact oil.
The bottom four corners of box 1 all fixedly connected with supporting leg 12, and the bottom of supporting leg 12 is provided with the slipmat, plays the supporting role of box 1.
Working principle: when the compact oil metering device is used, the adopted compact oil is introduced into the oil inlet barrel 21, filtered by the filter screen 23, flows onto the flow expansion plate 4 for expansion to increase the fluidity, and finally flows into the storage box 7 for storage after the foam removal effect of the foam removal net 6 to remove the air bubbles;
when the sealing plate 37 is taken, the switch of the driving motor 32 is turned on to drive the sealing plate 37 to reciprocate, when the sealing plate 37 moves leftwards, the liquid discharging pipe 9 is staggered from the circulating port 39, the liquid discharging pipe 9 does not circulate at the moment, when the sealing plate 37 returns, the liquid discharging pipe 9 is communicated with the circulating port 39, and at the moment, compact oil in the liquid discharging pipe 9 flows downwards; when the sealing plate 37 moves rightwards, the liquid discharging pipe 9 is staggered from the circulating port 39, the liquid discharging pipe 9 does not circulate at the moment, when the sealing plate 37 returns, the liquid discharging pipe 9 is communicated with the circulating port 39, and at the moment, dense oil in the liquid discharging pipe 9 flows downwards, so that an intermittent downflow effect of the dense oil can be realized, and the dense oil is convenient to take; second, the amount of each downstream flow can be regulated by adjusting the rotational speed of the drive motor 32.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A compact oil metering device, characterized in that: the device comprises a box body (1), a filtering mechanism (2) and a regulating mechanism (3), wherein a flow expansion plate (4) is fixedly connected to the upper side of the inner wall of the box body (1), a guide plate (5) is fixedly connected to the inner wall of the box body (1) and positioned on the lower side of the flow expansion plate (4), a defoaming net (6) is fixedly connected to the middle of the guide plate (5), a storage box (7) is fixedly connected to the middle of the box body (1) and positioned below the guide plate (5), and a liquid discharging pipe (9) is arranged at the bottom of the storage box (7) in a penetrating manner;
regulation and control mechanism (3) are including connecting frame (31), connecting frame (31) fixed connection is in the interior bottom middle part of box (1), the inside left side of connecting frame (31) is provided with driving motor (32), the output fixedly connected with motor shaft of driving motor (32) and the outer fixedly connected with carousel (33) of motor shaft, the surface rotation of carousel (33) is connected with dwang (34), the right-hand member rotation of dwang (34) is connected with slide (35), the right side surface fixedly connected with slide bar (36) of slide (35), the right-hand member fixedly connected with closing plate (37) of slide bar (36), the bottom of lower liquid pipe (9) is contradicted with closing plate (37).
2. A compact oil metering apparatus as claimed in claim 1, wherein: the filter mechanism (2) comprises an oil inlet barrel (21), the oil inlet barrel (21) fixedly penetrates through the middle of the upper surface of the box body (1), a filter screen (23) is arranged in the oil inlet barrel (21), connecting rods (22) are fixedly connected to two sides of the upper surface of the filter screen (23), and grooves (24) matched with the connecting rods (22) are formed in two sides of the upper surface of the oil inlet barrel (21).
3. A compact oil metering apparatus as claimed in claim 1, wherein: the flow expansion plate (4) is obliquely arranged on the inner wall of the box body (1).
4. A compact oil metering apparatus as claimed in claim 1, wherein: the inner wall of the storage box (7) is provided with a liquid level meter (8).
5. A compact oil metering apparatus as claimed in claim 1, wherein: the upper surface of closing plate (37) has seted up spout (38), circulation mouth (39) have been seted up at the middle part of spout (38), the bore of circulation mouth (39) and drain pipe (9) is unanimous.
6. A compact oil metering apparatus as claimed in claim 1, wherein: the connecting frame is characterized in that a liquid discharge pipe (11) penetrates through the right side of the inner bottom wall of the connecting frame (31), a funnel (10) is fixedly connected to the upper end of the liquid discharge pipe (11), and the bottom end of the liquid discharge pipe (11) penetrates through the outer portion of the box body (1).
7. A compact oil metering apparatus as claimed in claim 1, wherein: support legs (12) are fixedly connected to four corners of the bottom end of the box body (1).
8. A compact oil metering apparatus according to claim 7, wherein: the bottom ends of the supporting legs (12) are provided with anti-slip pads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310825088.XA CN116856906B (en) | 2023-07-06 | 2023-07-06 | Compact oil metering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310825088.XA CN116856906B (en) | 2023-07-06 | 2023-07-06 | Compact oil metering device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116856906A true CN116856906A (en) | 2023-10-10 |
| CN116856906B CN116856906B (en) | 2024-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310825088.XA Active CN116856906B (en) | 2023-07-06 | 2023-07-06 | Compact oil metering device |
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