CN113738639A - High-strength durable ceramic cylinder sleeve for slurry pump - Google Patents
High-strength durable ceramic cylinder sleeve for slurry pump Download PDFInfo
- Publication number
- CN113738639A CN113738639A CN202111168627.4A CN202111168627A CN113738639A CN 113738639 A CN113738639 A CN 113738639A CN 202111168627 A CN202111168627 A CN 202111168627A CN 113738639 A CN113738639 A CN 113738639A
- Authority
- CN
- China
- Prior art keywords
- sleeve
- installation
- steel
- embedded
- butt joint
- 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.)
- Pending
Links
- 239000000919 ceramic Substances 0.000 title claims abstract description 31
- 239000002002 slurry Substances 0.000 title abstract description 12
- 238000009434 installation Methods 0.000 claims abstract description 55
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 47
- 239000010959 steel Substances 0.000 claims abstract description 47
- 238000007789 sealing Methods 0.000 claims abstract description 24
- 210000001503 joint Anatomy 0.000 claims description 31
- 238000003466 welding Methods 0.000 claims 1
- 230000007774 longterm Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 10
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 210000003205 muscle Anatomy 0.000 description 3
- 238000003032 molecular docking Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
- F04B53/162—Adaptations of cylinders
- F04B53/166—Cylinder liners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04B15/02—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a high-strength durable ceramic cylinder sleeve for a slurry pump, which comprises an installation sleeve seat, a steel sleeve, an installation sleeve head and a ceramic sleeve, wherein an embedded groove is embedded in one end of the steel sleeve through a second built-in installation groove, the ceramic sleeve attached to the inner wall of the steel sleeve is embedded in the embedded groove, a reinforced sealing washer is embedded in the other end of the steel sleeve through a first built-in installation groove, the installation sleeve seat is installed at the other end of the steel sleeve through a connecting sleeve, and a first sealing washer is arranged between the installation sleeve seat and the steel sleeve. According to the invention, the steel external member is mutually matched with the ceramic external member on the caulking groove, so that the cylinder sleeve not only realizes the external surface strength, but also can avoid the situation that the inner wall of the cylinder sleeve is corroded and rusted after long-term operation, and the steel external member is mutually matched with the two external sealing rings through the reinforced sealing washer, so that the cylinder sleeve realizes internal and external sealing operation.
Description
Technical Field
The invention relates to the technical field of slurry pump accessories, in particular to a high-strength durable ceramic cylinder sleeve for a slurry pump.
Background
The mud pump is the 'heart' of the oil field drilling system, and the mud pump cylinder sleeve is an important easily-worn part of the hydraulic end of the mud pump, so the service life of the mud pump cylinder sleeve directly influences the service life of the mud pump. The working surface of the cylinder sleeve is contacted with high-temperature and high-pressure gas, and a piston ring reciprocates at a high speed on the surface of the working surface of the cylinder sleeve, so that the cylinder sleeve is required to have enough strength and rigidity and must also resist high temperature, corrosion and abrasion.
The cylinder sleeve of the slurry pump is known through a retrieval patent CN204253355U, and the problem that the service life of the existing cylinder sleeve of the slurry pump is short is solved. This slurry pump cylinder liner is including all being cylindric interior cylinder liner and outer cylinder liner, interior cylinder liner is located outer cylinder liner in, the convex annular that has on the outer cylinder liner inside wall keeps off the shoulder, the annular keeps off and has the annular groove on the terminal surface in the shoulder, has on the interior cylinder liner terminal surface and is cylindric connecting portion, connecting portion peg graft in the annular groove, and the inside wall of interior cylinder liner flushes with the inboard wall that the shoulder was kept off to the annular, forms a location chamber between interior cylinder liner and the outer cylinder liner.
However, the existing ceramic cylinder sleeve has the following problems:
(1) although the corrosion resistance degree of the cylinder sleeve is increased to a certain extent and the service life of the existing ceramic cylinder sleeve is prolonged, the overall texture of the existing ceramic cylinder sleeve is still weak compared with that of a steel cylinder sleeve, the cylinder sleeve is easily damaged under the condition of high-strength operation, and the service life of the ceramic cylinder sleeve is shortened;
(2) the existing ceramic cylinder sleeve has more inconveniences during assembly and disassembly, the overall sealing effect is still insufficient, the overall sealing effect of the cylinder sleeve is reduced easily along with long-time operation of the cylinder sleeve, and the practical effect of the cylinder sleeve is reduced.
Disclosure of Invention
The present invention is directed to a high strength durable ceramic liner for a mud pump to solve the problems set forth in the background above.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a durable type ceramic cylinder liner of high strength for slush pump, includes installation cover seat, steel external member, installation pullover and pottery external member, embedded the caulking groove of installing through the built-in mounting groove of second of one end in the steel external member, the embedded pottery external member of installing with the laminating of steel external member inner wall of caulking groove, the other end in the steel external member installs strenghthened type seal ring through the embedded installation of first built-in mounting groove, installation cover head is installed to the one end of steel external member, the installation cover seat is installed through the adapter sleeve to the other end of steel external member, and is equipped with first seal ring between installation cover seat and the steel external member, the outside of installation cover seat is equipped with the butt joint chamber, the butt joint mouth of steel external member intercommunication is installed to the butt joint intracavity, and the second seal ring is installed to the butt joint intracavity.
Preferably, an annular convex rib is installed on the outer side of the steel sleeve, and a first butt hole is formed in the annular convex rib.
Preferably, the mounting sleeve head and the steel sleeve are welded and fixed through a reinforced connecting rib, and a butt joint is mounted at a port of the mounting sleeve head.
Preferably, a rubber sealing ferrule matched with the embedded groove is sleeved between the embedded groove and the second built-in mounting groove.
Preferably, the mounting sleeve seat is provided with a second butt joint hole used in a matched manner, and the connecting sleeve and the inner wall of the steel sleeve are fixedly mounted through a thread structure.
Compared with the prior art, the invention has the beneficial effects that: this a durable type pottery jar of high strength cover for slush pump is rational in infrastructure, has following advantage:
(1) through the mutual matching of the steel sleeve and the ceramic sleeve on the caulking groove, the cylinder sleeve not only realizes the external surface strength and ensures the bearing strength after the cylinder sleeve is installed, but also avoids the corrosion and rust condition of the inner wall of the cylinder sleeve after long-term operation by the matching of the ceramic sleeve inside the cylinder sleeve, ensures the overall strength of the cylinder sleeve and the operation duration inside the cylinder sleeve, ensures that the cylinder sleeve can be better applied to the loading and use of a slurry pump, effectively prolongs the service life of the cylinder sleeve, and enlarges the applicable field;
(2) through the steel external member through strenghthened type seal ring and the mutual cooperation of two sets of external type sealing washers, make the cylinder liner realize the sealed operation of inside and outside type, its effect lies in the gap that the mud of both having guaranteed outside suction can not enter into cylinder liner part, also can guarantee to enter into the inside mud condition that can not permeate yet, further guarantee the linking effect of cylinder liner after the installation between and the exterior structure, ensure the stable effect that the cylinder liner can be during the operation of application, the installation pullover makes the better staff of being convenient for of cylinder liner dock the installation with the installation cover seat, can be quick install and remove the operation under the condition that does not influence the cylinder liner main part, and also can not influence the change of staff to the inside subassembly of cylinder liner, make the cylinder liner more convenient high efficiency when installation and dismantlement.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic view of the internal structure of the present invention;
FIG. 3 is a schematic side view of the present invention;
fig. 4 is a partial structural schematic diagram of the present invention.
In the figure: 1. installing a sleeve seat; 101. a second docking hole; 102. a docking chamber; 2. a first sealing gasket; 3. connecting sleeves; 4. a reinforced sealing washer; 5. a steel sleeve member; 501. an annular convex rib; 502. a first mating hole; 503. a first built-in mounting groove; 504. a second built-in mounting groove; 6. installing a sleeve head; 601. reinforcing the connecting ribs; 602. a butt joint; 7. caulking grooves; 8. a ceramic kit; 9. a second sealing gasket; 10. and (6) connecting the interfaces.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-4, an embodiment of the present invention is shown: a high-strength durable ceramic cylinder sleeve for a slurry pump comprises an installation sleeve seat 1, a steel sleeve 5, an installation sleeve head 6 and a ceramic sleeve 8;
specifically, an embedded groove 7 is embedded in one end of the steel sleeve 5 through a second built-in mounting groove 504, a rubber sealing ferrule matched for use is sleeved between the embedded groove 7 and the second built-in mounting groove 504, the sealing effect between the embedded groove 7 and the second built-in mounting groove 504 is increased by the rubber sealing ferrule, the condition that slurry and air leak is avoided, a ceramic sleeve 8 attached to the inner wall of the steel sleeve 5 is embedded in the embedded groove 7, and the steel sleeve 5 is matched with each other through the ceramic sleeve 8 on the embedded groove 7, so that the external surface strength of the cylinder sleeve is realized, the bearing strength of the cylinder sleeve after installation is ensured, meanwhile, the inner part is matched by the ceramic sleeve, the condition that the inner wall of the cylinder sleeve is corroded and rusted after long-term operation is avoided, the integral strength of the cylinder sleeve is ensured, the internal operation duration is ensured, and the cylinder sleeve can be better applied to the loading and using of a slurry pump, the service life of the cylinder sleeve is effectively prolonged, the applicable field is enlarged, the reinforced sealing washer 4 is embedded in the other end in the steel sleeve 5 through the first built-in mounting groove 503, the steel sleeve 5 is matched with the two groups of external sealing washers through the reinforced sealing washer 4, so that the cylinder sleeve realizes internal and external sealing operation, the effect is that not only is the mud pumped in from the outside prevented from entering the gap of the cylinder sleeve part, but also the mud entering the inside can be prevented from permeating, the connection effect of the cylinder sleeve and an external structure after mounting is further ensured, and the stable effect of the cylinder sleeve during the operation period is ensured;
specifically, an installation sleeve head 6 is installed at one end of a steel sleeve 5, the installation sleeve head 6 and the steel sleeve 5 are welded and fixed through a reinforced connecting rib 601, a butt joint 602 is installed at a port of the installation sleeve head 6, the butt joint 602 facilitates rapid butt joint installation of the installation sleeve head 6 during installation, an installation sleeve seat 1 is installed at the other end of the steel sleeve 5 through a connecting sleeve 3, a first sealing washer 2 is arranged between the installation sleeve seat 1 and the steel sleeve 5, a second butt joint hole 101 matched with the installation sleeve seat 1 is arranged on the installation sleeve seat 1, so that a worker can conveniently perform butt joint installation on the installation sleeve seat 1 through corresponding installation parts to realize installation and fixation of a cylinder sleeve, the connecting sleeve 3 and the inner wall of the steel sleeve 5 are fixedly installed through a threaded structure, the installation sleeve head 6 and the installation sleeve seat 1 enable the cylinder sleeve to be better convenient for butt joint installation of the worker, and rapid operation can be performed without affecting a cylinder sleeve main body, and can not influence the change of staff to the inside subassembly of cylinder liner yet, make the cylinder liner more convenient high-efficient when installation and dismantlement, the outside of installation sleeve seat 1 is equipped with butt joint chamber 102, butt joint 10 of 5 intercommunications of steel external member is installed to the butt joint chamber 102, and install second seal ring 9 in the butt joint chamber 102, annular protruding muscle 501 is installed in the outside of steel external member 5, and be equipped with first butt joint hole 502 on the annular protruding muscle 501, annular protruding muscle 501 is convenient for dock with corresponding installation component through first butt joint hole 502 and link up the installation.
The working principle is as follows: during the use, carry out corresponding butt joint installation with the cylinder liner through the second butt joint hole 101 in the installation sleeve seat 1 and the butt joint 602 on the installation pullover 6 respectively, ensure that butt joint mouth 10 and the complete butt joint of corresponding butt joint mounting structure, if need overhaul the cylinder liner inside during, then can dismantle through adapter sleeve 3 and overhaul the clearance with the mode of installation to inside, if need change the ceramic external member 8 of inside, then carry out outer top through the device to caulking groove 7, caulking groove 7 then can take out ceramic external member 8 and change.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (5)
1. The utility model provides a durable type ceramic cylinder liner of high strength for slush pump, includes installation cover seat (1), steel external member (5), installation pullover (6) and ceramic external member (8), its characterized in that: one end in the steel sleeve (5) is embedded with an embedded groove (7) through a second built-in mounting groove (504), a ceramic sleeve (8) which is attached to the inner wall of the steel sleeve (5) is embedded in the embedded groove (7), a reinforced sealing washer (4) is embedded and installed at the other end in the steel sleeve (5) through a first built-in installation groove (503), one end of the steel sleeve (5) is provided with an installation sleeve head (6), the other end of the steel sleeve (5) is provided with an installation sleeve seat (1) through a connecting sleeve (3), a first sealing washer (2) is arranged between the mounting sleeve seat (1) and the steel sleeve (5), the outer side of the mounting sleeve seat (1) is provided with a butt joint cavity (102), a butt joint opening (10) communicated with a steel sleeve (5) is arranged in the butt joint cavity (102), and a second sealing washer (9) is arranged in the butt joint cavity (102).
2. The high strength durable ceramic cylinder liner for a mud pump of claim 1, wherein: annular convex rib (501) are installed in the outside of steel external member (5), and are equipped with first butt hole (502) on annular convex rib (501).
3. The high strength durable ceramic cylinder liner for a mud pump of claim 1, wherein: the installation sleeve head (6) and the steel sleeve (5) are fixed by welding through the reinforced connecting ribs (601), and the butt joint (602) is installed at the port of the installation sleeve head (6).
4. The high strength durable ceramic cylinder liner for a mud pump of claim 1, wherein: a rubber sealing ferrule which is matched with the second built-in mounting groove (504) is sleeved between the caulking groove (7) and the second built-in mounting groove.
5. The high strength durable ceramic cylinder liner for a mud pump of claim 1, wherein: and a second butt joint hole (101) matched with the installation sleeve seat (1) is formed in the installation sleeve seat, and the connection sleeve (3) is fixedly installed on the inner wall of the steel sleeve (5) through a thread structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111168627.4A CN113738639A (en) | 2021-09-30 | 2021-09-30 | High-strength durable ceramic cylinder sleeve for slurry pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111168627.4A CN113738639A (en) | 2021-09-30 | 2021-09-30 | High-strength durable ceramic cylinder sleeve for slurry pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113738639A true CN113738639A (en) | 2021-12-03 |
Family
ID=78726027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111168627.4A Pending CN113738639A (en) | 2021-09-30 | 2021-09-30 | High-strength durable ceramic cylinder sleeve for slurry pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113738639A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020073840A1 (en) * | 1999-06-11 | 2002-06-20 | Pippert Frederick B. | Pump liner |
| US20110058959A1 (en) * | 2009-09-09 | 2011-03-10 | National Oilwell Varco, L. P. | Mud pump cylinder assembly and liner system |
| CN204253356U (en) * | 2014-12-02 | 2015-04-08 | 天津仁博铸件有限公司 | New-type mortar pump liner |
| CN204267275U (en) * | 2014-12-05 | 2015-04-15 | 北京金麟石油技术有限公司 | Retaining damping strengthens silicon carbide ceramics cylinder sleeve |
| CN204357693U (en) * | 2014-09-29 | 2015-05-27 | 宝鸡普道机械有限公司 | Bimetal changing inner sleeve formula cylinder sleeve |
| CN113446212A (en) * | 2021-08-05 | 2021-09-28 | 济南隆超石油机械锻造有限公司 | Bimetal cylinder sleeve easy to disassemble and assemble |
-
2021
- 2021-09-30 CN CN202111168627.4A patent/CN113738639A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020073840A1 (en) * | 1999-06-11 | 2002-06-20 | Pippert Frederick B. | Pump liner |
| US20110058959A1 (en) * | 2009-09-09 | 2011-03-10 | National Oilwell Varco, L. P. | Mud pump cylinder assembly and liner system |
| CN204357693U (en) * | 2014-09-29 | 2015-05-27 | 宝鸡普道机械有限公司 | Bimetal changing inner sleeve formula cylinder sleeve |
| CN204253356U (en) * | 2014-12-02 | 2015-04-08 | 天津仁博铸件有限公司 | New-type mortar pump liner |
| CN204267275U (en) * | 2014-12-05 | 2015-04-15 | 北京金麟石油技术有限公司 | Retaining damping strengthens silicon carbide ceramics cylinder sleeve |
| CN113446212A (en) * | 2021-08-05 | 2021-09-28 | 济南隆超石油机械锻造有限公司 | Bimetal cylinder sleeve easy to disassemble and assemble |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113738639A (en) | High-strength durable ceramic cylinder sleeve for slurry pump | |
| CN219350619U (en) | Seal welding integrated formation nail | |
| CN215201784U (en) | Cylinder head sprayer copper sheathing pressure equipment smelting tool and copper sheathing pressure equipment | |
| CN212517402U (en) | Hoisting structure and battery box | |
| CN211666968U (en) | Piston sealing structure for hydraulic cylinder | |
| CN211821215U (en) | Novel combined structure's quick connector | |
| CN222025928U (en) | Anti-abrasion piston assembly of piston vacuum pump | |
| CN218347677U (en) | Double-stroke supercharging cylinder | |
| CN216344546U (en) | Connector seat with high structural strength and stability for coal mine fully-mechanized machine accessory | |
| CN221033086U (en) | Cycloid oil pump inner and outer rotor | |
| CN209839010U (en) | Cone valve type clutch master cylinder | |
| CN105626995A (en) | Adapter of novel structure | |
| CN210196172U (en) | Novel hydraulic cylinder for injection molding equipment | |
| CN220170203U (en) | Water knife position sensor | |
| CN214617459U (en) | Center shaft casting with anti-corrosion function | |
| CN217271851U (en) | Novel engine connecting rod | |
| CN217081154U (en) | High-sealing type connecting and assembling flange piece | |
| CN215804913U (en) | Diesel engine starting device | |
| CN212225986U (en) | Make things convenient for hydraulic cylinder of dismouting | |
| CN217355017U (en) | Hydraulic oil cylinder for steering | |
| CN211231996U (en) | Butt welding high-pressure flange with good sealing performance | |
| CN217811313U (en) | Front end accessory of excavator | |
| CN219654874U (en) | Ceramic cylinder sleeve for slurry pump | |
| CN212614923U (en) | Automobile valve push rod | |
| CN220168645U (en) | Check valve convenient to valve clack is maintained |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 618000 block B, duanjiaba, Tianyuan street, Jingyang District, Deyang City, Sichuan Province Applicant after: Sichuan Fengye Petroleum Machinery Co.,Ltd. Address before: 224000 No. 16, locomotive equipment Industrial Park, WuLie Town, Dongtai City, Yancheng City, Jiangsu Province Applicant before: Jiangsu Fengye Machinery Manufacturing Co.,Ltd. |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211203 |