CN113756889A - Thermal power plant steam turbine maintenance device and maintenance method thereof - Google Patents
Thermal power plant steam turbine maintenance device and maintenance method thereof Download PDFInfo
- Publication number
- CN113756889A CN113756889A CN202110934731.3A CN202110934731A CN113756889A CN 113756889 A CN113756889 A CN 113756889A CN 202110934731 A CN202110934731 A CN 202110934731A CN 113756889 A CN113756889 A CN 113756889A
- Authority
- CN
- China
- Prior art keywords
- steam turbine
- rotating
- rod
- sliding
- wall
- 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
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000012423 maintenance Methods 0.000 title abstract description 20
- 230000005540 biological transmission Effects 0.000 claims description 20
- 238000013459 approach Methods 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000000605 extraction Methods 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
- 238000010248 power generation Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/28—Supporting or mounting arrangements, e.g. for turbine casing
- F01D25/285—Temporary support structures, e.g. for testing, assembling, installing, repairing; Assembly methods using such structures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
Abstract
The invention discloses a steam turbine maintenance device of a thermal power plant and a maintenance method thereof, wherein the steam turbine maintenance device comprises two bottom plates which are symmetrically arranged, a movable cavity is arranged in each bottom plate, a rotating rod is arranged in each movable cavity, and threads in opposite directions are respectively arranged on one section of each of two ends of each bottom plate; a sliding rod is welded in the middle of the outer wall of the top end of the bottom plate, and a sliding seat is sleeved on the outer wall of the sliding rod in a sliding manner; dwang both ends still symmetry is provided with and removes the seat, internal thread hole has been seted up in removing the seat, it overlaps in the outside of dwang through internal thread hole meshing, it is articulated with the slide through the hinge bar on the outer wall of its top, and it passes from between the drive belt, it all is fixed with the rack in two slide relative one sides, the thread groove has been seted up to the wall internal symmetry of both sides of rack, the lead screw has been run through in the thread groove, one section inside that extends to the rack of lead screw, install splint on its tip, other end fixedly connected with pivot, the pivot overcoat is equipped with the drive belt, the bottom cover of drive belt is located on the dwang.
Description
Technical Field
The invention relates to the technical field of steam turbine overhauling devices and overhauling methods, in particular to a steam turbine overhauling device and a steam turbine overhauling method for a thermal power plant.
Background
The steam turbine is a rotary power machine which converts the energy of steam into mechanical work, is also called as a steam turbine, is mainly used as a prime mover for power generation, can directly drive various pumps, fans, compressors, ship propellers and the like, and can meet the heat supply requirements in production and life by utilizing the exhaust steam or intermediate extraction steam of the steam turbine, and the steam turbine is a very key energy supply tool in a thermal power plant.
In order to ensure the normal use of the steam turbine, the steam turbine needs to be overhauled regularly. When the steam turbine is overhauled, a hoisting machine is used for hoisting the steam turbine for overhauling, the method needs to hoist the steam turbine all the time, and the energy consumption is large; or the steam turbine is placed on the bottom plate for maintenance, the method is inconvenient for maintaining the bottom of the steam turbine, and the existing device lacks the functions of adjusting the height of the steam turbine and fixing the steam turbine at the same time.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a steam turbine maintenance device of a thermal power plant and a maintenance method thereof.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a steam turbine maintenance device of a thermal power plant comprises two symmetrically arranged bottom plates, wherein movable cavities are formed in the bottom plates, the movable cavities extend upwards to the top end surfaces of the bottom plates, and rotating parts penetrating through the movable cavities are arranged on the bottom plates; the sliding rod is vertically welded in the middle of the outer wall of the top end of the bottom plate; the sliding seat is sleeved on the outer wall of the sliding rod in a sliding manner; the movable lifting pieces are symmetrically arranged at two ends of the rotating piece and are hinged with the outer wall of the sliding seat through hinge seats; the clamping pieces are arranged on the opposite surfaces of the two sliding seats; and the transmission belt is sleeved outside the rotating piece and the clamping piece.
As a preferred technical scheme of the present invention, the rotating member includes a rotating rod, one end of the rotating rod is connected to the inner wall bearing of the movable cavity, the other end of the rotating rod extends to the outside of the movable cavity, a rotating handle is fixedly connected to the end of the rotating rod, and threads with opposite spiral directions are respectively disposed on one of two ends of the bottom plate.
As a preferable technical solution of the present invention, the movable lifting member includes a movable base, the movable base has an internal threaded hole therein, the internal threaded hole is engaged with and sleeved outside the rotating rod, an outer wall of a top end of the movable base is connected to a hinge rod through a hinge base, and a top end of the hinge rod is hinged to an outer wall of one side of the slide base and passes through the transmission belt.
According to a preferable technical scheme of the invention, the clamping piece comprises a placing rack, a U-shaped placing rack is fixed on one opposite surface of the two sliding seats, thread grooves are symmetrically formed in two side wall surfaces of the placing rack, a screw rod penetrates through the thread grooves, one section of the screw rod extends into the placing rack, a clamping plate is installed on the end portion of the screw rod, the other end of the screw rod extends to the outside of the placing rack, a limiting block is arranged on the end portion of the screw rod, a rotating shaft is fixedly connected to one side of the limiting block, a driving belt is sleeved outside the rotating shaft, the bottom end of the driving belt is sleeved on a rotating rod, and the rotating shaft is in transmission connection with the rotating rod through the driving belt.
As a preferable technical scheme of the invention, bases are welded in the middle of the two bottom plates.
As a preferable technical solution of the present invention, a distance that the screw rod can advance in the thread groove is smaller than a distance that the movable seat can advance on the rotating rod.
The invention also provides a maintenance method of the steam turbine of the thermal power plant, which comprises the following steps:
s1, hoisting the steam turbine with overhaul by using a hoisting device, and placing the steam turbine on two placing racks;
s2, rotating a rotating handle, wherein the rotating handle drives a rotating rod to rotate, two moving seats move on the rotating rod and approach to each other in the rotating process of the rotating rod, the moving seats drive a sliding seat to move on a sliding rod through a hinge rod, and meanwhile, the sliding seat drives a steam turbine to move upwards through a placing frame;
s3, when the rotating rod rotates, the rotating rod drives the screw rod to rotate through the transmission belt, the screw rod moves in the thread groove and drives the clamping plate to be close to the shaft core of the steam turbine until the shaft core of the steam turbine is tightly clamped by the clamping plate;
and S4, when the clamping plate clamps the shaft core of the steam turbine, the rotating handle is continuously rotated until the height of the steam turbine is proper because the advancing distance of the screw rod is short.
Compared with the prior art, the invention has the following beneficial effects:
the steam turbine with maintenance is hoisted by using a hoisting device, the steam turbine is placed on two placing racks, a steam turbine shaft core is positioned inside the placing racks, then a rotating handle is rotated to drive a rotating rod to rotate, in the rotating process of the rotating rod, two moving seats move on the rotating rod and approach each other, the moving seats drive a sliding seat to move on a sliding rod through a hinge rod, simultaneously the sliding seat drives the steam turbine to move upwards through the placing racks, when the rotating rod rotates, the rotating rod drives a screw rod to rotate through a transmission belt, the screw rod moves in a thread groove and drives a clamping plate to approach the shaft core of the steam turbine until the clamping plate tightly clamps the steam turbine shaft core, because the advancing distance of the screw rod is shorter, when the clamping plate clamps the steam turbine shaft core, the rotating handle continues to rotate until the steam turbine is proper in height, when the maintenance device is used, the rotating rod and the screw rod are linked through the transmission belt, in the process of adjusting the maintenance height of the steam turbine, can drive the lead screw simultaneously, make the lead screw drive splint tightly and clip the steam turbine axle core, make things convenient for operating personnel to overhaul the steam turbine.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Fig. 2 is a schematic structural view of the clamping member of the present invention.
Fig. 3 is a top view of the base plate of the present invention.
Fig. 4 is a front view of the present invention.
Wherein, the names corresponding to the reference numbers are:
1. a base plate; 101. a movable cavity; 2. rotating the rod; 3. turning a handle; 4. a movable seat; 5. a hinged lever; 6. a slide bar; 7. a slide base; 8. placing a rack; 9. a transmission belt; 10. a screw rod; 11. a splint; 12. a limiting block; 13. A base.
Detailed Description
The present invention will be further described with reference to the following description and examples, which include but are not limited to the following examples.
Example (b):
as shown in fig. 1, 2, 3 and 4, the invention provides a steam turbine maintenance device of a thermal power plant, which comprises two bottom plates 1 symmetrically arranged, wherein a base 13 is welded between the two bottom plates 1, a movable cavity 101 is formed in each bottom plate 1, the movable cavity 101 extends upwards to the top end surface of each bottom plate 1, a rotating rod 2 penetrating through the movable cavity 101 is arranged on each bottom plate 1, one end of each rotating rod 2 is connected with an inner wall bearing of the corresponding movable cavity 101, the other end of each rotating rod extends to the outside of the corresponding movable cavity 101, a rotating handle 3 is fixedly connected to the end of each rotating rod 2, and threads with opposite spiral directions are respectively arranged on one section of each of two ends of each bottom plate 1; a sliding rod 6 is welded in the middle of the outer wall of the top end of the bottom plate 1, and a sliding seat 7 is slidably sleeved on the outer wall of the sliding rod 6; the two ends of the rotating rod 2 are also symmetrically provided with moving seats 4, the moving seat 4 is internally provided with an internal thread hole which is meshed and sleeved outside the rotating rod 2 through the internal thread hole, the outer wall of the top end of the moving seat is connected with a hinge rod 5 through a hinge seat, the top end of the hinge rod 5 is hinged with the outer wall of one side of the slide seat 7 through the hinge seat and penetrates through the transmission belt 9, two opposite surfaces of the slide seats 7 are respectively and fixedly provided with a U-shaped placing frame 8, two side wall surfaces of the placing frame 8 are symmetrically provided with thread grooves, the thread grooves are internally provided with lead screws 10 in a penetrating manner, one section of each lead screw 10 extends to the inside of the placing frame 8, the end part of each lead screw is provided with a clamping plate 11, the other end part of each lead screw extends to the outside of the placing frame 8, the end part of each lead screw is provided with a limiting block 12, one side of the limiting block 12 is fixedly connected with a rotating shaft, and the transmission belt 9 is sleeved outside the rotating shaft, the bottom end of the transmission belt 9 is sleeved on the rotating rod 2, and the rotating shaft is in transmission connection with the rotating rod 2 through the transmission belt 9;
the steam turbine with maintenance is hoisted by using a hoisting device, the steam turbine is placed on two placing racks 8, a steam turbine shaft core is positioned inside the placing racks 8, then the rotating handle 3 is rotated, the rotating handle 3 drives the rotating rod 2 to rotate, the rotating rod 2 moves on the rotating rod 2 and approaches to each other in the rotating process, the moving seat 4 drives the sliding seat 7 to move on the sliding rod 6 through the hinge rod 5, meanwhile, the sliding seat 7 drives the steam turbine to move upwards through the placing racks 8, the rotating rod 2 drives the screw rod 10 to rotate through the driving belt 9 when rotating, the screw rod 10 moves in the thread groove and drives the clamping plate 11 to approach to the shaft core of the steam turbine until the shaft core of the steam turbine is tightly clamped by the screw rod 10, when the clamping plate 11 clamps the shaft core of the steam turbine, the rotating handle 3 continues to be rotated until the height of the steam turbine is proper, when the maintenance device is used, through drive belt 9 linkage dwang 2 and lead screw 10, at the in-process of adjustment steam turbine maintenance height, can drive lead screw 10 simultaneously, make lead screw 10 drive splint 11 tightly clip the steam turbine axle core, make things convenient for operating personnel to overhaul the steam turbine.
The embodiment also provides a maintenance method of the steam turbine of the thermal power plant, which comprises the following steps:
referring to fig. 1 and 4, S1, hoisting the steam turbine with overhaul by using a hoisting device, and placing the steam turbine on two placing frames 8;
referring to fig. 1 and 3, S2, the rotating handle 3 is rotated, the rotating handle 3 drives the rotating rod 2 to rotate, during the rotation of the rotating rod 2, the two moving seats 4 move on the rotating rod 2 and approach each other, the moving seats 4 drive the sliding seat 7 to move on the sliding rod 6 through the hinge rod 5, and simultaneously the sliding seat 7 drives the steam turbine to move upwards through the placing rack 8;
referring to fig. 1-4, in S3, when the rotating rod 2 rotates, it drives the screw rod 10 to rotate through the transmission belt 9, the screw rod 10 moves in the thread groove, and drives the clamping plate 11 to approach the shaft core of the steam turbine until it tightly clamps the shaft core of the steam turbine;
referring to fig. 1 and 4, at S4, because the lead screw 10 has a short advance distance, when the clamp plate 11 clamps the turbine shaft core, the rotating handle 3 continues to rotate until the turbine is at a proper height.
The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and any insubstantial changes or modifications made within the spirit and scope of the main design of the present invention will solve the technical problems consistent with the present invention and shall be included in the scope of the present invention.
Claims (7)
1. The utility model provides a steam turbine of thermal power plant overhauls device, includes bottom plate (1) that two symmetries set up, its characterized in that, movable chamber (101) have been seted up in bottom plate (1), the top surface department that upwards extends to bottom plate (1) in movable chamber (101), be provided with on bottom plate (1)
The rotating part is arranged in the movable cavity (101) in a penetrating way;
a sliding rod (6) vertically welded in the middle of the outer wall of the top end of the bottom plate (1);
a sliding seat (7) which is sleeved on the outer wall of the sliding rod (6) in a sliding manner;
the movable lifting pieces are symmetrically arranged at two ends of the rotating piece and hinged with the outer wall of the sliding seat (7) through hinge seats;
the clamping pieces are arranged on the opposite surfaces of the two sliding seats (7);
and the transmission belt (9) is sleeved outside the rotating piece and the clamping piece.
2. The steam turbine of the thermal power plant overhauls device of claim 1, characterized in that, the rotation piece includes dwang (2), the one end of dwang (2) with the inner wall bearing connection in activity chamber (101), the other end extends to the outside in activity chamber (101), and fixedly connected with on the tip changes handle (3), be provided with the opposite screw thread of spiral direction respectively on one of them section at bottom plate (1) both ends.
3. The steam turbine overhauling device for the thermal power plant as recited in claim 2, wherein the movable lifting member comprises a movable base (4), an internal threaded hole is formed in the movable base (4) and is engaged with the outer part of the rotating rod (2) through the internal threaded hole, a hinge rod (5) is connected to the outer wall of the top end of the movable base through a hinge base, the top end of the hinge rod (5) is hinged to the outer wall of one side of the sliding base (7), and the hinge rod passes through the transmission belt (9).
4. A steam turbine servicing device for a thermal power plant according to claim 3, the clamping piece comprises a placing rack (8), the two opposite surfaces of the sliding seats (7) are fixed with the U-shaped placing rack (8), thread grooves are symmetrically formed in two side wall surfaces of the placing frame (8), a screw rod (10) penetrates through the thread grooves, one section of the screw rod (10) extends to the inside of the placing frame (8), the end part of the bracket is provided with a splint (11), the other end extends to the outside of the placing rack (8), a limit block (12) is arranged on the end part of the rotary shaft, one side of the limit block (12) is fixedly connected with a rotary shaft, the rotating shaft is sleeved with a transmission belt (9), the bottom end of the transmission belt (9) is sleeved on the rotating rod (2), the rotating shaft is in transmission connection with the rotating rod (2) through the transmission belt (9).
5. Steam turbine service unit of a thermal power plant according to claim 1, characterized in that a base (13) is welded in the middle of the two bottom plates (1).
6. A steam turbine service device of a thermal power plant according to claim 4, characterized in that the distance that the screw rod (10) can advance in the thread groove is smaller than the distance that the movable seat (4) can advance on the rotating rod (2).
7. A steam turbine plant steam turbine servicing method characterized by comprising the steam turbine plant steam turbine servicing apparatus of any one of claims 1 to 6, the servicing method comprising the steps of:
s1, hoisting the steam turbine with overhaul by using a hoisting device, and placing the steam turbine on two placing racks (8);
s2, rotating the rotating handle (3), wherein the rotating handle (3) drives the rotating rod (2) to rotate, two moving seats (4) move on the rotating rod (2) and approach to each other in the rotating process of the rotating rod (2), the moving seats (4) drive the sliding seat (7) to move on the sliding rod (6) through the hinge rod (5), and meanwhile, the sliding seat (7) drives the steam turbine to move upwards through the placing rack (8);
s3, when the rotating rod (2) rotates, the rotating rod drives the screw rod (10) to rotate through the transmission belt (6), the screw rod (10) moves in the thread groove, and the clamping plate (11) is driven to be close to the shaft core of the steam turbine until the shaft core of the steam turbine is tightly clamped by the clamping plate;
and S4, when the shaft core of the steam turbine is clamped by the clamping plates (11) due to the fact that the advancing distance of the screw rod (10) is short, the rotating handle (3) continues to rotate until the height of the steam turbine is proper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110934731.3A CN113756889A (en) | 2021-08-16 | 2021-08-16 | Thermal power plant steam turbine maintenance device and maintenance method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110934731.3A CN113756889A (en) | 2021-08-16 | 2021-08-16 | Thermal power plant steam turbine maintenance device and maintenance method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113756889A true CN113756889A (en) | 2021-12-07 |
Family
ID=78789391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110934731.3A Pending CN113756889A (en) | 2021-08-16 | 2021-08-16 | Thermal power plant steam turbine maintenance device and maintenance method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113756889A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105822365A (en) * | 2016-04-18 | 2016-08-03 | 大唐东北电力试验研究所有限公司 | Adjustable shaft journal for centering of two rotors and three supports |
| CN205852710U (en) * | 2016-07-21 | 2017-01-04 | 金川集团股份有限公司 | A kind of adjustable axial part support means |
| CN207256180U (en) * | 2017-10-18 | 2018-04-20 | 高安杰 | A kind of height-adjustable oil equipment maintenance unit |
| CN108281916A (en) * | 2018-01-19 | 2018-07-13 | 储昭汉 | A kind of outdoor water-proof box type transformation station arrangement |
| CN208629474U (en) * | 2018-08-31 | 2019-03-22 | 商丘工学院 | A kind of mechanical arm claw spacing regulator |
| CN209125796U (en) * | 2018-11-28 | 2019-07-19 | 云南交通运输职业学院 | A kind of auto repair auxiliary tool |
| CN209577786U (en) * | 2019-03-04 | 2019-11-05 | 浙江农业商贸职业学院 | A kind of metal plate reparation drawing utensil |
| CN112737484A (en) * | 2020-12-25 | 2021-04-30 | 国网河南省电力公司邓州市供电公司 | Photovoltaic panel mounting structure and photovoltaic power generation equipment |
-
2021
- 2021-08-16 CN CN202110934731.3A patent/CN113756889A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105822365A (en) * | 2016-04-18 | 2016-08-03 | 大唐东北电力试验研究所有限公司 | Adjustable shaft journal for centering of two rotors and three supports |
| CN205852710U (en) * | 2016-07-21 | 2017-01-04 | 金川集团股份有限公司 | A kind of adjustable axial part support means |
| CN207256180U (en) * | 2017-10-18 | 2018-04-20 | 高安杰 | A kind of height-adjustable oil equipment maintenance unit |
| CN108281916A (en) * | 2018-01-19 | 2018-07-13 | 储昭汉 | A kind of outdoor water-proof box type transformation station arrangement |
| CN208629474U (en) * | 2018-08-31 | 2019-03-22 | 商丘工学院 | A kind of mechanical arm claw spacing regulator |
| CN209125796U (en) * | 2018-11-28 | 2019-07-19 | 云南交通运输职业学院 | A kind of auto repair auxiliary tool |
| CN209577786U (en) * | 2019-03-04 | 2019-11-05 | 浙江农业商贸职业学院 | A kind of metal plate reparation drawing utensil |
| CN112737484A (en) * | 2020-12-25 | 2021-04-30 | 国网河南省电力公司邓州市供电公司 | Photovoltaic panel mounting structure and photovoltaic power generation equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108284347B (en) | Semi-automatic drilling machine | |
| CN214056892U (en) | Stamping machine | |
| CN113756889A (en) | Thermal power plant steam turbine maintenance device and maintenance method thereof | |
| CN116995868A (en) | Rotating shaft dismounting assembly of brushless direct current torque motor | |
| CN217142596U (en) | Gear positioning device in gear processing machine | |
| CN209304425U (en) | A kind of maintenance positioning tool of steam turbine rotor | |
| CN202461225U (en) | Bending machine of solar panel core discharge pipes | |
| CN218891768U (en) | Fixing structure for pinch roll repair | |
| CN212315335U (en) | Rotatable intelligent lifting mechanism | |
| CN214816772U (en) | Detachable spare part production clamping device | |
| CN221314123U (en) | Plunger pump apparatus for producing of convenient centre gripping | |
| CN221641370U (en) | Glass plate perforating device with accurate positioning | |
| CN214322135U (en) | Matrix type intelligent two-protection welding robot device | |
| CN219925868U (en) | Hydraulic support hydro-cylinder stand dismounting device | |
| CN212423412U (en) | Ship overhaul platform | |
| CN221389239U (en) | Internal thread tapping mechanism for basket bolt | |
| CN115921638B (en) | Rotary stamping structure for metal casting stamping of numerical control machining center | |
| CN217702231U (en) | Screw locking machine with five-face screw locking function | |
| CN217943288U (en) | Equipment maintenance table with lifting adjustment | |
| CN221437385U (en) | Voucher pressing machine | |
| CN213033442U (en) | Pipe bending machine device suitable for random die height | |
| CN221623105U (en) | Friction press convenient to adjust | |
| CN215919730U (en) | Casting head milling clamp for automobile gearbox shell | |
| CN219684625U (en) | Pressure reducing cover angle adjusting tool | |
| CN221435695U (en) | Numerical control machining tool for C-shaped support |
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 |