CN111002197A - A lining type prestressed steel cylinder concrete pipe core wire winding derusting device - Google Patents
A lining type prestressed steel cylinder concrete pipe core wire winding derusting device Download PDFInfo
- Publication number
- CN111002197A CN111002197A CN201911372955.9A CN201911372955A CN111002197A CN 111002197 A CN111002197 A CN 111002197A CN 201911372955 A CN201911372955 A CN 201911372955A CN 111002197 A CN111002197 A CN 111002197A
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- CN
- China
- Prior art keywords
- wire winding
- core wire
- reducer
- support
- type prestressed
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B27/00—Other grinding machines or devices
- B24B27/033—Other grinding machines or devices for grinding a surface for cleaning purposes, e.g. for descaling or for grinding off flaws in the surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/04—Headstocks; Working-spindles; Features relating thereto
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/10—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces
- B24B47/12—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces by mechanical gearing or electric power
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/04—Protective covers for the grinding wheel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/06—Dust extraction equipment on grinding or polishing machines
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Abstract
本申请公开了一种内衬式预应力钢筒混凝土管管芯缠丝除锈装置，包括安装台，与安装台平行的滑轨，安装台上安装有传动机构和尾座，传动机构和尾座的相对一侧均安装有夹持机构，安装台上安装有放线装置和应力发生装置，滑轨上安装有滑台，滑轨的上安装有驱动机构，滑台上固定有第二支撑架，第二支撑架上安装有第二转轮，滑台上固定有安装架，安装架上转动连接有支撑管，支撑管的一端铰接有保护罩。本发明前边除锈后边缠丝，解决了缠丝除锈费时费力，增加了人工成本，又降低了生产效率的问题，将缠丝和除锈合为一道工序，同时进行，除锈彻底，除锈效果大大优于人工，同时降低人工成本，提高生产效率，还减少了灰尘的产生，提高了工人的工作环境。
The application discloses a lining type prestressed steel cylinder concrete pipe core wire winding derusting device, comprising an installation table, a slide rail parallel to the installation table, a transmission mechanism and a tailstock are installed on the installation table, and the transmission mechanism and the tailstock are installed on the installation table. A clamping mechanism is installed on the opposite side of the seat, a pay-off device and a stress generating device are installed on the installation table, a sliding table is installed on the sliding rail, a driving mechanism is installed on the sliding rail, and a second support is fixed on the sliding table A second runner is installed on the second support frame, an installation frame is fixed on the sliding table, a support tube is rotatably connected to the installation frame, and one end of the support tube is hinged with a protective cover. The invention solves the problems of time-consuming and laborious wire-wrapping and rust-removing, increases labor costs, and reduces production efficiency. The wire-wrapping and rust-removing are combined into one process, and are carried out at the same time. The rust effect is much better than that of labor, while reducing labor costs, improving production efficiency, reducing dust generation, and improving the working environment of workers.
Description
Technical Field
The invention relates to the technical field of machinery, in particular to a wire winding and rust removing device for a lining type prestressed concrete cylinder pipe core.
Background
The prestressed concrete cylinder pipe, PCCP for short, is a pipe made by winding circumferential prestressed steel wires on the outer side of a concrete pipe core with a steel cylinder and manufacturing a cement mortar protective layer, and comprises a lining type Prestressed Concrete Cylinder Pipe (PCCPL) and an embedded Prestressed Concrete Cylinder Pipe (PCCPE), wherein the lining type prestressed concrete cylinder pipe is a pipe core consisting of the steel cylinder and a concrete lining, the circumferential prestressed steel wires are wound on the outer side of the steel cylinder, and then the cement mortar protective layer is manufactured.
At present, a PCCPL steel cylinder is assembled in a pipe die after hydraulic pressure inspection is finished, the pipe die is hung on a centrifugal machine, the centrifugal machine is started, premixed concrete is put into the pipe die, the pipe die is hung into a steam curing pit for high-temperature steam curing after forming is finished, the temperature is generally 55-65 ℃, the time is about 8-12 hours, demoulding is carried out after steam curing is finished, the outer wall of the steel cylinder is easy to rust after the PCCPL pipe is subjected to steam curing, rust removing operation needs to be carried out manually before wire winding, the wire winding and rust removing are time-consuming and labor-consuming, labor cost is increased, production efficiency is reduced, and a lining type prestressed steel cylinder concrete pipe core wire winding and rust removing device is provided for solving the problems.
Disclosure of Invention
The application provides a bushing type prestressed concrete cylinder pipe core wire winding rust cleaning device, has solved before the wire winding, needs the manual work to carry out the rust cleaning operation, and the wire winding rust cleaning is wasted time and energy, has both increased the cost of labor, has reduced production efficiency's problem again.
The application provides a lining type prestressed concrete cylinder pipe core wire winding and rust removing device, which comprises an installation table and a slide rail parallel to the installation table, wherein a transmission mechanism and a tailstock are installed on the installation table, clamping mechanisms are installed on one opposite sides of the transmission mechanism and the tailstock, a wire releasing device and a stress generating device are installed on the installation table, a sliding table is installed on the slide rail, a driving mechanism is installed on the slide rail, a second supporting frame is fixed on the sliding table, a second rotating wheel is installed on the second supporting frame, a mounting frame is fixed on the sliding table, a supporting pipe is rotatably connected on the mounting frame, a protective cover is hinged at one end of the supporting pipe, an optical head mill is installed in the middle of the protective cover, a pressure cylinder is installed on the sliding table, the tail end of a piston rod of the pressure cylinder is rotatably connected with the other end of the supporting pipe, a dust collector is installed on the sliding table, and one end of the dust collector extends into the protective cover along the supporting pipe.
Preferably, the transmission mechanism comprises a third motor, a gearbox and a spindle box, the third motor is installed on one side of the gearbox, and the gearbox is in transmission connection with the spindle box.
Preferably, pay-off is including installing first speed reducer on the mount table, the second runner is installed to the output shaft end of first speed reducer, one side of first speed reducer is equipped with first motor, first motor passes through the shaft coupling and installs on the first speed reducer, the resistance cylinder is installed to one side of second runner, the gyro wheel is installed to the piston rod end of resistance cylinder, the gyro wheel is contradicted one side of second runner.
Preferably, the stress generating device is including installing the brace table of mount table one side, all be equipped with the spout on the relative lateral wall in the brace table, two install first support frame jointly in the spout, one side of first support frame articulates there is tensile mechanism, tensile mechanism's one end articulates the one end of brace table, install first runner on the first support frame, equidistant a plurality of guide rolls that are equipped with around the first runner, the guide roll is installed on the first support frame.
Preferably, the driving mechanism comprises a pulley arranged at one end of the sliding rail, the other end of the sliding rail is provided with a rotating roller, the pulley and the rotating roller are jointly wound with a pull rope, the pull rope is fixed on the second support frame, one side of the rotating roller is provided with a second speed reducer, one side of the second speed reducer is connected with a second motor through a coupler, and the second speed reducer is in transmission connection with the rotating roller.
Preferably, the clamping mechanism is a three-jaw chuck.
Preferably, the first speed reducer is a worm gear speed reducer.
According to the technical scheme, when the lining type prestressed steel cylinder concrete pipe core wire winding and rust removing device is used, the prestressed steel cylinder concrete pipe is clamped on the device through the two clamping mechanisms, the rotation of the prestressed steel cylinder concrete pipe is controlled through the transmission mechanism, the steel wire is wound on the prestressed steel cylinder concrete pipe through the wire releasing device, the stress generating device and the second rotating wheel in sequence, in the winding process, the pressure cylinder jacks up the supporting pipe, the protective cover is abutted against the side face of the prestressed steel cylinder concrete pipe through the lever principle, the steel cylinder rotates during wire winding, the polishing head pressed on the surface of the steel cylinder rotates, so that rust on the steel cylinder is removed, meanwhile, the dust collector forms negative pressure in the protective cover to absorb iron polished by the polishing head, dust in a workshop is reduced, wire winding and rust removing are combined into a process, and cost is reduced, the production efficiency is improved.
Compared with the prior art, the invention has the beneficial effects that:
1. through the matching of the transmission mechanism and the clamping mechanism, the pipe is clamped and driven to rotate, so that the subsequent wire winding and rust removal are facilitated, and the production efficiency is high;
2. through the cooperation of the pay-off device, the stress generating device and the second rotating wheel, pay-off can be carried out during winding, the tensile force of the steel wire can be controlled, and the processing quality is improved;
3. through the cooperation of polishing head and dust catcher, at the in-process of kinking, polish to the tubular product and get rid of the rust stain, solved the rust cleaning problem that wastes time and energy to retrieve the rust after polishing, reduce the production of dust in the factory, reduce the environmental pollution to around, improve production efficiency.
In conclusion, the wire winding is carried out after rust removal, so that the problems that the wire winding and rust removal are time-consuming and labor-consuming, the labor cost is increased, and the production efficiency is reduced are solved.
Drawings
In order to more clearly illustrate the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.
FIG. 1 is a schematic structural diagram of a wire-wrapping rust removal device for a lining type prestressed concrete cylinder pipe core according to the present invention;
FIG. 2 is a schematic structural view of an installation table of a wire winding and rust removing device for a lining type prestressed concrete cylinder pipe core, which is provided by the invention;
FIG. 3 is a schematic structural view of a slide rail of a wire-wrapping rust removal device for a lining type prestressed concrete cylinder pipe core, which is provided by the invention;
FIG. 4 is an enlarged structural view of the position A of the wire wrapping and rust removing device for the pipe core of the lining type prestressed concrete cylinder pipe provided by the invention;
FIG. 5 is a schematic view of an installation structure of a polishing head of a wire winding and rust removing device for a lining type prestressed concrete cylinder pipe core.
In the figure: the device comprises a transmission mechanism 1, a clamping mechanism 2, a protective cover 3, a supporting pipe 4, a tailstock 5, a first motor 6, a first speed reducer 7, a first rotating wheel 8, a first supporting frame 9, a supporting table 10, a tension mechanism 11, a second rotating wheel 12, a mounting table 13, a pulley 14, a sliding rail 15, a second motor 16, a second speed reducer 17, a rotating roller 18, a second supporting frame 19, a third rotating wheel 20, a sliding table 21, a mounting frame 22, a pressure cylinder 23, a dust suction pipe 24, a dust collector 25, a pull rope 26, a guide roller 27, a resistance cylinder 28 and a light grinding head 29.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.
Referring to fig. 1-5, a lining type prestressed concrete cylinder pipe core wire winding and rust removing device comprises an installation table 13, wherein the installation table 13 is made of i-steel and is stably supported, a slide rail 15 parallel to the installation table 13 is positioned on the same side for wire winding and rust removing, a transmission mechanism 1 and a tailstock 5 are installed on the installation table 13, the tailstock 5 can stretch out and draw back for a certain distance to facilitate clamping and disassembling of pipes, a clamping mechanism 2 is installed on one side of the transmission mechanism 1 opposite to the tailstock 5, the clamping mechanism 2 is a three-jaw chuck, the pipes are conveniently assembled and disassembled and are stably supported, the processing efficiency is improved, a wire releasing device and a stress generating device are installed on the installation table 13, the wire releasing and the control of the tensile force of steel wires can be carried out during winding, the processing quality is improved, a sliding table 21 is installed on the slide rail 15, the sliding table 21 slides on the slide rail 15, a, used for driving the sliding table 21 to move, facilitate wire winding and rust removal, a second supporting frame 19 is fixed on the sliding table 21, a second rotating wheel 20 is installed on the second supporting frame 19, the direction of a steel wire is changed, the steel wire is wound on a pipe, an installation frame 22 is fixed on the sliding table 21 and plays a role of a fulcrum, a supporting pipe 4 is rotatably connected on the installation frame 22 and can rotate by taking the installation frame 22 as the fulcrum, one end of the supporting pipe 4 is hinged with a protective cover 3 and can be tightly attached to the pipe, a polishing head 29 is installed in the middle of the protective cover 3 and rotates when the wire is wound, so that rust on a steel cylinder is removed, a pressure cylinder 23 is installed on the sliding table 21, the tail end of a piston rod of the pressure cylinder 23 is rotatably connected with the other end of the supporting pipe 4, the pressure cylinder 23 controls the supporting rod pipe 4 to rotate, the protective cover 3 is abutted to the side, the dust collector 25 is installed on the sliding table 21, one end of the dust collector 25 extends into the protective cover 3 along the supporting tube 4, negative pressure is formed in the protective cover 3 by the dust collector 25 to absorb rust polished by the polishing head 29, workshop dust is reduced, wire winding and rust removal are combined into one process, and the purposes of reducing cost and improving production efficiency are achieved.
In the invention, the transmission mechanism 1 comprises a third motor, a gearbox and a main shaft box, wherein the gearbox is used for changing the rotating speed of the pipe, the main shaft box supports the pipe, the third motor is arranged on one side of the gearbox, and the gearbox is in transmission connection with the main shaft box.
According to the invention, the pay-off device comprises a first speed reducer 7 arranged on an installation platform 13, the first speed reducer 7 is a worm and gear speed reducer and is used for preventing a second rotating wheel 12 from rotating after being subjected to tension, the second rotating wheel 12 is arranged at the tail end of an output shaft of the first speed reducer 7, a steel wire is wound on the second rotating wheel 12, a first motor 6 is arranged on one side of the first speed reducer 7, the first motor 6 is arranged on the first speed reducer 7 through a coupler, the first motor 6 is a servo motor and can accurately control the rotating speed, a resistance cylinder 28 is arranged on one side of the second rotating wheel 12, a roller is arranged at the tail end of a piston rod of the resistance cylinder 28, and the roller abuts against one side of the second rotating wheel.
The stress generating device comprises a supporting table 10 arranged on one side of an installation table 13, sliding grooves are formed in opposite side walls in the supporting table 10, a first supporting frame 9 is jointly arranged in the two sliding grooves, the first supporting frame 9 can slide on the supporting table 10, a tension mechanism 11 is hinged to one side of the first supporting frame 9, one end of the tension mechanism 11 is hinged to one end of the supporting table 10, the tension mechanism 11 has certain pressure and pulls the first supporting frame 9 to provide tension for a steel wire, a first rotating wheel 8 is arranged on the first supporting frame 9, a plurality of guide rollers 27 are arranged around the first rotating wheel 8 at equal intervals, the guide rollers 27 are arranged on the first supporting frame 9, the steel wire passing through the first rotating wheel 8 passes through the guide rollers 27, the steel wire is prevented from contacting other places of the device, and the steel wire and equipment are protected.
According to the invention, the driving mechanism comprises the pulley 14 arranged at one end of the sliding rail 15, the rotating roller 18 is arranged at the other end of the sliding rail 15, the pulley 14 and the rotating roller 18 are jointly wound with the pull rope 26, the pull rope 26 is fixed on the second supporting frame 19, the second supporting frame 19 is driven to move through the pull rope 26, the pull rope 26 is fixed on the second supporting frame 19 because main force is concentrated on the second supporting frame 19, and can move more stably, the second speed reducer 17 is arranged at one side of the rotating roller 18, one side of the second speed reducer 17 is connected with the second motor 16 through a coupler, and the second speed reducer 17 is in transmission connection with the rotating roller 18, so that the moving speed of wire winding and rust removal can be controlled.
According to the technical scheme, during use, the prestressed concrete cylinder pipe is clamped on the device through the two clamping mechanisms 2, the transmission mechanism 1 controls the prestressed concrete cylinder pipe to rotate, the steel wire sequentially passes through the pay-off device, the stress generation device and the second rotating wheel 20 and is wound on the prestressed concrete cylinder pipe, in the winding process, the pressure cylinder 23 jacks up the support pipe 4, the protection cover 3 is abutted to the side face of the prestressed concrete cylinder pipe through the lever principle, the steel cylinder rotates during wire winding, the polishing head 29 pressed on the surface of the steel cylinder rotates, rust on the steel cylinder is removed, meanwhile, the dust collector 25 forms negative pressure in the protection cover 3 and absorbs rust polished by the polishing head 29, dust in a workshop is reduced, wire winding and rust removal are combined into one process, the cost is reduced, and the purpose of improving the production efficiency is achieved.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope of the disclosure being indicated by the following claims.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The above-described embodiments of the present application do not limit the scope of the present application.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911372955.9A CN111002197A (en) | 2019-12-27 | 2019-12-27 | A lining type prestressed steel cylinder concrete pipe core wire winding derusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911372955.9A CN111002197A (en) | 2019-12-27 | 2019-12-27 | A lining type prestressed steel cylinder concrete pipe core wire winding derusting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111002197A true CN111002197A (en) | 2020-04-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911372955.9A Pending CN111002197A (en) | 2019-12-27 | 2019-12-27 | A lining type prestressed steel cylinder concrete pipe core wire winding derusting device |
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| CN (1) | CN111002197A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112388489A (en) * | 2020-11-17 | 2021-02-23 | 贵州西南装备制造有限公司 | Automatic rust cleaning device for pipeline |
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| CN207497533U (en) * | 2017-10-26 | 2018-06-15 | 首钢京唐钢铁联合有限责任公司 | Carrier roller type conveyor |
| CN207807294U (en) * | 2017-11-17 | 2018-09-04 | 河北兴泰玻璃钢有限公司 | A kind of glass fiber reinforced plastic tank cylinder grinding device |
| CN109304807A (en) * | 2017-07-27 | 2019-02-05 | 江苏江扬建材机械有限公司 | A kind of foundation-free winding machine and wire |
| CN208544748U (en) * | 2018-04-27 | 2019-02-26 | 广州市南粤钢管有限公司 | A kind of steel pipe workshop transport device |
| CN209520692U (en) * | 2019-02-17 | 2019-10-22 | 山东佰盛能源科技有限公司 | A kind of grinding apparatus for pipe end |
| CN212287137U (en) * | 2019-12-27 | 2021-01-05 | 青铜峡市青龙新型管材有限公司 | Lining type prestressed concrete cylinder pipe core wire winding and rust removing device |
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| CN2233018Y (en) * | 1995-09-20 | 1996-08-14 | 武汉市水泥制品厂 | Pipe core wire-coiling machine for prestressed steel concrete water pipe |
| EP1350600A1 (en) * | 2002-04-02 | 2003-10-08 | Olimpia 80 SRL | Apparatus and procedure for surface finishing of pipes by means of lamellar wheels |
| CN101734523A (en) * | 2008-11-07 | 2010-06-16 | 马祥 | Control system of thread winding machine |
| CN102464233A (en) * | 2010-11-18 | 2012-05-23 | 江苏邦威机械制造有限公司 | Stress generating device for horizontal differential wire winding machine |
| CN102464234A (en) * | 2010-11-19 | 2012-05-23 | 江苏邦威机械制造有限公司 | Stress bend wheel for wire winding machine |
| CN102180385A (en) * | 2011-04-08 | 2011-09-14 | 江苏江扬建材机械有限公司 | Online steel wire tension monitoring device on wire winder |
| CN103130037A (en) * | 2013-02-26 | 2013-06-05 | 江苏邦威机械制造有限公司 | Small-caliber horizontal balance-weight compensation balanced numerically-controlled wire winding machine |
| CN203449121U (en) * | 2013-08-19 | 2014-02-26 | 绵阳福德机器人有限责任公司 | Grinding machine |
| CN205928248U (en) * | 2016-05-24 | 2017-02-08 | 湖州项王机械有限公司 | Optical equipment is thrown to double -end head |
| CN109304807A (en) * | 2017-07-27 | 2019-02-05 | 江苏江扬建材机械有限公司 | A kind of foundation-free winding machine and wire |
| CN207497533U (en) * | 2017-10-26 | 2018-06-15 | 首钢京唐钢铁联合有限责任公司 | Carrier roller type conveyor |
| CN207807294U (en) * | 2017-11-17 | 2018-09-04 | 河北兴泰玻璃钢有限公司 | A kind of glass fiber reinforced plastic tank cylinder grinding device |
| CN208544748U (en) * | 2018-04-27 | 2019-02-26 | 广州市南粤钢管有限公司 | A kind of steel pipe workshop transport device |
| CN209520692U (en) * | 2019-02-17 | 2019-10-22 | 山东佰盛能源科技有限公司 | A kind of grinding apparatus for pipe end |
| CN212287137U (en) * | 2019-12-27 | 2021-01-05 | 青铜峡市青龙新型管材有限公司 | Lining type prestressed concrete cylinder pipe core wire winding and rust removing device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112388489A (en) * | 2020-11-17 | 2021-02-23 | 贵州西南装备制造有限公司 | Automatic rust cleaning device for pipeline |
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Application publication date: 20200414 |
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| RJ01 | Rejection of invention patent application after publication |