CN211258576U - Oil pumping device for oil exploitation - Google Patents
Oil pumping device for oil exploitation Download PDFInfo
- Publication number
- CN211258576U CN211258576U CN201922045269.2U CN201922045269U CN211258576U CN 211258576 U CN211258576 U CN 211258576U CN 201922045269 U CN201922045269 U CN 201922045269U CN 211258576 U CN211258576 U CN 211258576U
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- Prior art keywords
- oil
- pipe
- fixedly connected
- base plate
- well pump
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- 238000005086 pumping Methods 0.000 title claims abstract description 35
- 239000003129 oil well Substances 0.000 claims abstract description 56
- 238000001914 filtration Methods 0.000 claims abstract description 43
- 238000001816 cooling Methods 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 77
- 238000000605 extraction Methods 0.000 claims description 21
- 239000000758 substrate Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 6
- 239000003921 oil Substances 0.000 description 82
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 7
- 235000017491 Bambusa tulda Nutrition 0.000 description 7
- 241001330002 Bambuseae Species 0.000 description 7
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 7
- 239000011425 bamboo Substances 0.000 description 7
- 239000004576 sand Substances 0.000 description 7
- 239000000498 cooling water Substances 0.000 description 5
- 239000003208 petroleum Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Details Of Reciprocating Pumps (AREA)
Abstract
The utility model discloses an oil pumping device for oil exploitation, which comprises a base plate and a filtering unit; the right end of the upper surface of the base plate is provided with an oil well pump, the four corners of the lower surface of the base plate are fixedly connected with telescopic ends of an electric push rod, the fixed ends of the electric push rods are fixedly connected with a bottom plate, the middle part of the upper surface of the bottom plate is provided with a through groove, a cooling unit is arranged on the outer side surface of the oil well pump, an oil pumping hole of the oil well pump is fixedly connected with an oil pumping pipe, the other end of the oil pumping pipe is fixedly connected with an underground oil pipe, the other end of the underground oil pipe penetrates through the lower surface of the base plate and is fixedly connected with an extension sleeve, the oil pumped in the oil well can be filtered through the filtering unit, the filtering unit can be cleaned and replaced and maintained at proper time through the matched threaded installation of the filter cylinder and the extension casing, the electric push rod, the bottom plate and the base plate can enable the filtering unit to be more convenient and fast when being maintained.
Description
Technical Field
The utility model relates to an oil development technical field specifically is an oil extraction oil jack.
Background
In the traditional method for extracting petroleum from the petroleum well, the petroleum in the petroleum well is mostly extracted by adopting a rocker arm piston lifting mode, so that the working strength of workers is increased, and the working efficiency is low; in addition, in the process of extraction, because the vibration is large, the extracted oil contains partial silt and moisture, and the quality of oil extraction is influenced. Aiming at a heavy oil well or a polymer flooding well with high well fluid viscosity, the well fluid viscosity has great influence on the resistance of the conventional oil well pump plunger during downward movement. To reduce friction resistance, the downward resistance is typically reduced by increasing the plunger barrel clearance, however, for sand production wells, sand carried in the well fluid is more likely to settle into the barrel plunger clearance when the plunger stops moving. The measures widely adopted at present comprise a sand control groove formed by lathing a plunger, a long plunger sand control pump and the like. These measures play a certain role in reducing friction resistance, preventing sand from blocking and slowing down abrasion, but also cannot fundamentally solve the problem of larger downward resistance of the sand blocking and the plunger because of the contact mode between the rigid body and the rigid body, a complicated and disordered flow field in the pump cavity, accumulation and settlement of sand grains in gaps and the like.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome current defect, provide an oil recovery pumping unit, can filter the oil of extracting in the oil well inside through the filter unit, can wash and change the maintenance to the filter unit in suitable time through straining a section of thick bamboo and extending telescopic cooperation screw installation, can make the filter unit more convenient when maintaining through electric putter, bottom plate and base plate, can effectively solve the problem in the background art.
In order to achieve the above object, the utility model provides a following technical scheme: an oil pumping device for oil exploitation comprises a base plate and a filtering unit;
substrate: the oil well pump is arranged at the right end of the upper surface of the base plate, the four corners of the lower surface of the base plate are fixedly connected with the telescopic ends of the electric push rods, the fixed ends of the electric push rods are fixedly connected with the base plate, the middle part of the upper surface of the base plate is provided with a through groove, the outer side surface of the oil well pump is provided with a cooling unit, an oil pumping hole of the oil well pump is fixedly connected with an oil pumping pipe, the other end of the oil pumping pipe is fixedly connected with an underground oil pipe, the other end of the underground oil pipe penetrates through the lower surface of the base plate and is fixedly connected with an extension sleeve, one end of the underground oil pipe, which is positioned at the lower surface;
a filtering unit: the filter unit comprises a filter cylinder, small filter holes, a fine filter plate, large filter holes and a coarse filter plate, the filter cylinder is arranged at the lower end of an extension sleeve, mounting threads are arranged on the outer side surface of the filter cylinder, the filter cylinder is mounted with mounting thread grooves on the inner side surface of the extension sleeve in a matched threaded manner, the fine filter plate is arranged at the upper end of the inner side surface of the filter cylinder, the outer side surface of the fine filter plate is fixedly connected with the inner side surface of the filter cylinder, the small filter holes are uniformly formed in the upper surface of the fine filter plate, the coarse filter plate is arranged at the lower end of an inner cavity of the filter cylinder, the outer side surface of the coarse filter plate is fixedly connected;
the device comprises a base plate, a single chip microcomputer, a flow display instrument, a filter cylinder, an oil well pump, a bottom plate, an electric push rod, a filter cylinder, an oil well and a pipeline, wherein the single chip microcomputer is arranged on the upper surface of the base plate, the input end of the single chip microcomputer is electrically connected with the output end of an external power supply, the input end of the single chip microcomputer is electrically connected with the output end of the flow display instrument, the output end of the single chip microcomputer is electrically connected with the input end of the oil well pump, the device is installed and placed through the bottom plate, then the electric push rod is enabled to work through the single chip microcomputer, the four electric push rods extend simultaneously, the base plate fixedly connected with the upper surface of the electric push rod is driven to rise, the bottom end of the underground oil pipe is suspended, then the filter cylinder is installed with the extension, thereby make the oil-well pump through the oil pipe of its oil pumping hole fixed connection and the underground oil pipe of oil pumping pipe fixed connection to the inside oil extraction of oil well, then filter the big debris in the inside oil of oil well through the coarse filtration board of straining a section of thick bamboo inside and the big filtration pore that coarse filtration board upper surface set up, then carry out the filtration of less debris to the oil of extraction through the fine filtration board that strain a section of thick bamboo inner chamber upper end set up and the little filtration pore that fine filtration board upper surface set up, thereby can make the oil quality that the oil-well pump was taken out more pure, then discharge the oil of taking out through the oil extraction pipe of oil-well pump oil drain hole fixed connection, the flow of oil-well pump is monitored through the flow display during, simultaneously, make cooling unit work through the singlechip, carry out cooling process to the oil-well pump, thereby can make the.
Further, the cooling unit includes water tank, cooling tube, water pump and water pipe, the upper surface of base plate is located in proper order to water tank and water pump, the one end of cooling tube and the water inlet intercommunication of water tank, the other end spiral of cooling tube coil at the lateral surface of oil-well pump and with the delivery port intercommunication of water pump, the one end of water pipe and the water inlet intercommunication of water pump, the other end of water pipe and the delivery port intercommunication of water tank, the input of water pump is connected with the output electricity of singlechip, makes water pump work through the singlechip, makes the water pump lead to pipe and extracts the cooling water in the water tank, then the water pump carries out cooling treatment through its delivery port fixed connection's cooling tube to the oil-well pump that the cooling tube spiral coiled.
Furthermore, still include closing cap and check valve, the closing cap is located the oil extraction pipe and is kept away from the one end of oil-well pump, the intercommunication department of oil extraction pipe and underground oil pipe is located to the check valve, can make the oil extraction pipe avoid by external debris pollution and jam at non-operating condition through the closing cap.
The flow data that the flow display instrument detected can be displayed through the displayer.
The device further comprises four mounting holes and a filling pipe, wherein the four mounting holes are uniformly formed along four corners of the lower surface of the bottom plate, the filling pipe is arranged on the upper surface of the water tank and is communicated with a water inlet of the water tank, the device can be well installed and arranged through the mounting holes, and cooling water can be filled into the water tank through the filling pipe.
Compared with the prior art, the beneficial effects of the utility model are that: this oil recovery oil jack has following benefit: this oil development pumping unit can filter the oil of extracting in the oil well inside through the filter unit, and then improves the fineness of extraction oil, and can avoid debris to cause the jam and the damage to the oil-well pump, can wash and change the maintenance filter unit in suitable time through straining a section of thick bamboo and extending telescopic cooperation screw thread installation, can make the filter unit more convenient when maintaining through electric putter, bottom plate and base plate.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic side view of the present invention;
FIG. 3 is a schematic sectional view of the present invention;
fig. 4 is a schematic view of the local enlarged structure at a position of the present invention.
In the figure: the device comprises a base plate 1, a singlechip 2, an oil pump 3, a cooling unit 4, a water tank 41, a cooling pipe 42, a water pump 43, a water pipe 44, an oil pumping pipe 5, a one-way valve 6, an underground oil pipe 7, an extension sleeve 8, a filtering unit 9, a filter cartridge 91, a small filter hole 92, a fine filter plate 93, a large filter hole 94, a coarse filter plate 95, mounting threads 10, an oil discharge pipe 11, a sealing cover 12, a display 13, a through groove 14, a bottom plate 15, an electric push rod 16, a mounting hole 17, a filling pipe 18, a flow display 19 and a screw groove 20.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution: an oil pumping device for petroleum exploitation comprises a base plate 1 and a filtering unit 9;
substrate 1: the oil well pump 3 is arranged at the right end of the upper surface of the base plate 1, four corners of the lower surface of the base plate 1 are fixedly connected with telescopic ends of an electric push rod 16, fixed ends of the electric push rod 16 are fixedly connected with a base plate 15, a through groove 14 is formed in the middle of the upper surface of the base plate 15, a cooling unit 4 is arranged on the outer side surface of the oil well pump 3, an oil pumping hole of the oil well pump 3 is fixedly connected with an oil pumping pipe 5, the other end of the oil pumping pipe 5 is fixedly connected with an underground oil pipe 7, the other end of the underground oil pipe 7 penetrates through the lower surface of the base plate 1 and is fixedly connected with an extension sleeve 8, a flow display instrument 19 is arranged at one end, located on the lower;
the filtering unit 9: the filtering unit 9 comprises a filtering cylinder 91, small filtering holes 92, a fine filtering plate 93, large filtering holes 94 and a coarse filtering plate 95, the filtering cylinder 91 is arranged at the lower end of the extension sleeve 8, the outer side surface of the filtering cylinder 91 is provided with mounting threads 10, the filtering cylinder 91 is in threaded mounting with mounting thread grooves 20 on the inner side surface of the extension sleeve 8 in a matching manner, the fine filtering plate 93 is arranged at the upper end of the inner side surface of the filtering cylinder 91, the outer side surface of the fine filtering plate 93 is fixedly connected with the inner side surface of the filtering cylinder 91, the small filtering holes 92 are uniformly formed in the upper surface of the fine filtering plate 93, the coarse filtering plate 95 is arranged at the lower end of the inner cavity of the filtering cylinder 91, the outer side surface of;
wherein, still include singlechip 2, singlechip 2 locates the upper surface of base plate 1, the input of singlechip 2 is connected with the output of external power supply, the input of singlechip 2 is connected with the output of flow display instrument 19 electrically, the output of singlechip 2 is connected with the input of oil-well pump 3 electrically, install this device through the bottom plate and place, then make electric putter 16 work through singlechip 2, make four electric putter 16 extend simultaneously, and then drive the base plate 1 that electric putter 16 upper surface is fixed to be connected and rise, thereby make the bottom of underground oil pipe 7 unsettled, then cooperate threaded installation with extension sleeve 8 with straining a section of thick bamboo 91, then cooperate installation with the pipeline of oil well inside through extension sleeve 8, then make electric putter 16 contract through singlechip 2, thereby make extension sleeve 8 and strain a section of thick bamboo 91 place in the oil well inside, then the oil pump 3 is operated by the singlechip 2, so that the oil pump 3 pumps oil from the inside of the oil well through the oil pumping pipe 5 fixedly connected with the oil pumping hole and the underground oil pipe fixedly connected with the oil pumping pipe 5, then large impurities in the oil well are filtered through the coarse filter plate 95 arranged in the filter cartridge 91 and the large filter hole arranged on the upper surface of the coarse filter plate 95, then the pumped oil is filtered by the fine filter plate 93 arranged on the upper end of the inner cavity of the filter cartridge 91 and the small filter hole 92 arranged on the upper surface of the fine filter plate 93, so that the quality of the oil pumped by the oil pump 3 is more pure, then the pumped oil is discharged through the oil discharge pipe fixedly connected with the oil discharge hole of the oil pump 3, the flow of the oil pump is monitored by the flow display instrument 19 during the period, meanwhile, the cooling unit 4 is operated by the singlechip 2 to cool the oil pump 3, thereby enabling the oil well pump 3 to work circularly and efficiently.
Wherein, the cooling unit 4 comprises a water tank 41, a cooling pipe 42, a water pump 43 and a water pipe 44, the water tank 41 and the water pump 43 are sequentially arranged on the upper surface of the substrate 1, one end of the cooling pipe 42 is communicated with a water inlet of the water tank 41, the other end of the cooling pipe 42 is spirally wound on the outer side surface of the oil well pump 3 and is communicated with a water outlet of the water pump 43, one end of the water pipe 44 is communicated with a water inlet of the water pump 43, the other end of the water pipe 44 is communicated with a water outlet of the water tank 41, the input end of the water pump 43 is electrically connected with the output end of the singlechip 2, the water pump 43 is operated by the singlechip 2, the water pump 43 pumps cooling water in the water tank 41 through the water pipe 44, then the water pump 43 cools the oil well pump 3 in which the cooling pipe 42 is spirally wound through the cooling pipe 42 fixedly connected with the water outlet of the water pump, the filling pipe 18 is arranged on the upper surface of the water tank 41, the filling pipe 18 is communicated with the water inlet of the water tank 41, the device can be well installed through the installation hole 17, and cooling water can be filled into the water tank 41 through the filling pipe 18.
Wherein, still include closing cap 12 and check valve 6, closing cap 12 is located oil extraction pipe 11 and is kept away from the one end of oil-well pump 3, and check valve 6 is located the intercommunication department of taking out oil pipe 5 and underground oil pipe 7, can make oil extraction pipe 11 avoid by external debris pollution and jam in non-operating condition through closing cap 12.
The flow meter is characterized by further comprising a display 13, wherein the display 13 is arranged at the front end of the upper surface of the substrate 1, the input end of the display 13 is electrically connected with the output end of the single chip microcomputer 2, and flow data detected by the flow meter display 19 can be displayed through the display 13.
When in use: the device is installed and placed through a bottom plate, then the electric push rod 16 works through the single chip microcomputer 2, the four electric push rods 16 extend simultaneously, further the base plate 1 fixedly connected with the upper surface of the electric push rod 16 is driven to rise, so that the bottom end of the underground oil pipe 7 is suspended, then the filter cylinder 91 and the extension sleeve 8 are installed in a matching threaded mode, then the extension sleeve 8 and a pipeline inside an oil well are installed in a matching mode, then the electric push rod 16 is contracted through the single chip microcomputer 2, so that the extension sleeve 8 and the filter cylinder 91 are arranged inside the oil well, then the oil well pump 3 works through the single chip microcomputer 2, so that the oil well is pumped by the oil well pump 3 through the underground oil pipe fixedly connected with the oil pumping pipe 5 and the oil pumping pipe 5 through the oil pumping holes, then large impurities in the oil well are filtered through the coarse filter plate 95 inside the filter cylinder 91 and the large filter holes arranged on the upper surface of the, then carry out the filtration of less debris to the oil of extraction through the fine filter plate 93 that sets up in the inner chamber upper end of straining a section of thick bamboo 91 and the little filtration pore 92 of fine filter plate 93 upper surface setting, thereby can make the oil quality of oil-well pump 3 extraction more pure, then discharge the oil of extracting through the oil extraction pipe of 3 oil extraction hole fixed connection of oil-well pump, the flow of oil-well pump is monitored through flow display 19 during this, simultaneously, make water pump 43 work through singlechip 2, make water pump 43 pass through water pipe 44 and extract the cooling water in water tank 41, then water pump 43 carries out cooling treatment through the cooling tube 42 of its delivery port fixed connection to the oil-well pump 3 that cooling tube 42 spiral coiled, thereby can make oil-well pump 3 carry out the high-efficient work of circulation.
It should be noted that, in this embodiment, the specific model of the single chip microcomputer 2 is siemens NH-K9, the flow indicator 19 may be a CH6 model of guangzhou dichuan instruments and meters ltd, the oil pump 3 may be a model of 76ZHCB-60 of zibobos dragon vehicle oil pump ltd, the water pump 43 may be an IRG model 100-250 of shanghai north ocean pump industry ltd, and the single chip microcomputer 2 controls the oil pump 3 and the water pump 43 to operate by a method commonly used in the prior art.
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 (5)
1. An oil extraction oil pumping device is characterized in that: comprises a substrate (1) and a filtering unit (9);
substrate (1): the oil well pump is characterized in that an oil well pump (3) is arranged at the right end of the upper surface of the base plate (1), the four corners of the lower surface of the base plate (1) are fixedly connected with telescopic ends of an electric push rod (16), a fixed end of the electric push rod (16) is fixedly connected with a bottom plate (15), the middle of the upper surface of the bottom plate (15) is provided with a through groove (14), the outer side surface of the oil well pump (3) is provided with a cooling unit (4), an oil pumping hole of the oil well pump (3) is fixedly connected with an oil pumping pipe (5), the other end of the oil pumping pipe (5) is fixedly connected with an underground oil pipe (7), the other end of the underground oil pipe (7) penetrates through the lower surface of the base plate (1) and is fixedly connected with an extension sleeve (8), one end, located on the lower surface of the base plate (, an oil discharge hole of the oil well pump (3) is fixedly connected with an oil discharge pipe (11);
filtration unit (9): the filtering unit (9) comprises a filtering cylinder (91), small filtering holes (92), a fine filtering plate (93), large filtering holes (94) and a coarse filtering plate (95), the filter cylinder (91) is arranged at the lower end of the extension sleeve (8), the outer side surface of the filter cylinder (91) is provided with a mounting thread (10), the filter cylinder (91) is matched with the mounting screw groove (20) on the inner side surface of the extension sleeve (8) for screw thread mounting, the fine filter plate (93) is arranged at the upper end of the inner side surface of the filter cylinder (91), the outer side surface of the fine filter plate (93) is fixedly connected with the inner side surface of the filter cylinder (91), the upper surface of the fine filter plate (93) is uniformly provided with small filter holes (92), the coarse filter plate (95) is arranged at the lower end of the inner cavity of the filter cylinder (91), the outer side surface of the coarse filter plate (95) is fixedly connected with the inner cavity side surface of the filter cylinder (91), the upper surface of the coarse filter plate (95) is uniformly provided with large filter holes (94);
the oil well pump is characterized by further comprising a single chip microcomputer (2), the single chip microcomputer (2) is arranged on the upper surface of the base plate (1), the input end of the single chip microcomputer (2) is electrically connected with the output end of an external power supply, the input end of the single chip microcomputer (2) is electrically connected with the output end of the flow display instrument (19), and the output end of the single chip microcomputer (2) is electrically connected with the input end of the oil well pump (3).
2. The oil pumping unit for oil extraction as set forth in claim 1, wherein: cooling unit (4) include water tank (41), cooling tube (42), water pump (43) and water pipe (44), the upper surface of base plate (1) is located in proper order to water tank (41) and water pump (43), the one end of cooling tube (42) and the water inlet intercommunication of water tank (41), the other end spiral of cooling tube (42) coil the lateral surface of oil-well pump (3) and with the delivery port intercommunication of water pump (43), the one end of water pipe (44) and the water inlet intercommunication of water pump (43), the other end of water pipe (44) and the delivery port intercommunication of water tank (41), the input of water pump (43) is connected with the output electricity of singlechip (2).
3. The oil pumping unit for oil extraction as set forth in claim 1, wherein: the oil pumping device is characterized by further comprising a sealing cover (12) and a one-way valve (6), wherein the sealing cover (12) is arranged at one end, far away from the oil well pump (3), of the oil discharge pipe (11), and the one-way valve (6) is arranged at the communication position of the oil pumping pipe (5) and the underground oil pipe (7).
4. The oil pumping unit for oil extraction as set forth in claim 1, wherein: the display device is characterized by further comprising a display (13), wherein the display (13) is arranged at the front end of the upper surface of the substrate (1), and the input end of the display (13) is electrically connected with the output end of the single chip microcomputer (2).
5. The oil pumping unit for oil extraction as set forth in claim 2, wherein: the water tank is characterized by further comprising four mounting holes (17) and four filling pipes (18), wherein the four mounting holes (17) are uniformly formed along four corners of the lower surface of the bottom plate (15), the filling pipes (18) are arranged on the upper surface of the water tank (41), and the filling pipes (18) are communicated with a water inlet of the water tank (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922045269.2U CN211258576U (en) | 2019-11-25 | 2019-11-25 | Oil pumping device for oil exploitation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922045269.2U CN211258576U (en) | 2019-11-25 | 2019-11-25 | Oil pumping device for oil exploitation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211258576U true CN211258576U (en) | 2020-08-14 |
Family
ID=71990372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922045269.2U Expired - Fee Related CN211258576U (en) | 2019-11-25 | 2019-11-25 | Oil pumping device for oil exploitation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211258576U (en) |
-
2019
- 2019-11-25 CN CN201922045269.2U patent/CN211258576U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200814 |