CN210255619U - Building steel pipe inner wall rust cleaning device - Google Patents
Building steel pipe inner wall rust cleaning device Download PDFInfo
- Publication number
- CN210255619U CN210255619U CN201921269166.8U CN201921269166U CN210255619U CN 210255619 U CN210255619 U CN 210255619U CN 201921269166 U CN201921269166 U CN 201921269166U CN 210255619 U CN210255619 U CN 210255619U
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- seat
- rust removing
- rust
- steel pipe
- wall
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Abstract
The utility model discloses a building steel pipe inner wall rust cleaning device, including ring shape rust cleaning seat, ring shape rust cleaning seat is equipped with the controller outward, be equipped with rotation type rust cleaning device on the ring shape rust cleaning seat, rotation type rust cleaning device both sides are equipped with automatically regulated mobile device. The inner wall of the steel pipe is quickly and effectively derusted by rotating the annular derusting seat and matching with the high-speed rotation of the steel wire derusting wheel, and the rotating directions of the two hollow shaft motors are opposite, so that the rotating speed of the steel wire derusting wheel can be effectively increased, and the steel wire derusting wheel can more powerfully derust; the arc-shaped supporting seat is driven to stretch out and draw back through the small electric telescopic rods to support the device, and the two electric telescopic rods are matched with each other to stretch out and draw back, so that the ring-shaped rust removing seat can move at a constant speed, and the inner wall of the steel pipe can be automatically subjected to rust removal.
Description
Technical Field
The utility model relates to a steel pipe rust cleaning relevant equipment field, especially a building steel pipe inner wall rust cleaning device.
Background
The steel pipe is required to be subjected to rust removal treatment before leaving a factory and before deep processing, the technology of automatic rust removal equipment is mature, but for small-batch and local rust removal, the automatic rust removal equipment is adopted for rust removal, and manpower and material resources are obviously wasted. For small-batch and local derusting, a handheld deruster is mostly adopted for derusting.
In patent CN 201721634078.4-a portable steel tube inner wall deruster, the structure is simple and the manufacture is easy; the portable multifunctional electric tool can be held by hands for work and is convenient to carry; the long shaft, the cylindrical grinding head and the conical grinding head are arranged, different grinding heads can be replaced, and the connecting shaft can be lengthened, so that the adaptability is wider, and the rust removal of steel pipes with different diameters and different lengths can be met; the front end of the basic shaft is provided with external threads and anti-skid threads, the front end of the lengthened shaft is provided with the external threads, the rear end of the lengthened shaft is provided with the internal threads and the reinforcing hoops, and the two end parts are provided with the anti-skid threads and the assembling holes, so that the anti-skid connecting device is convenient to connect, decompose, and is not easy to deform and damage.
But carry out the rust cleaning of steel pipe inner wall through the mode of extension axle, can lead to the volume grow of equipment, portable not convenient to carry, can grind the steel pipe inner wall thin through the bistrique rust cleaning simultaneously, reduced the wall thickness of steel pipe, lead to steel pipe intensity to reduce.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the above problem, a building steel pipe inner wall rust cleaning device has been designed, it is small-size light, portable's function has, it is great to have solved current deruster volume, the problem of not portable, through the rotation of steel wire deruster itself, the rotation of deuterogamy rust cleaning seat, thereby simple quick rust cleaning the inner wall with the heavy-calibre steel pipe, can not produce the loss to steel pipe itself again simultaneously, the intensity of steel pipe has been guaranteed, and flexible through electric telescopic handle removes, thereby automatically, carry out the rust cleaning of steel pipe inner wall.
The technical scheme of the utility model is that, the rust removing device for the inner wall of the building steel pipe comprises an annular rust removing seat, a controller is arranged outside the annular rust removing seat, a rotary rust removing device is arranged on the annular rust removing seat, and automatic adjusting and moving devices are arranged on two sides of the rotary rust removing device;
the rotary type rust removing device comprises a plurality of rust removing holes formed in an annular rust removing seat, the rust removing holes are uniformly distributed in the annular rust removing seat, a rust removing bearing is installed in each rust removing hole, a rust removing rotating shaft is installed in each rust removing bearing, a telescopic groove is formed in the upper end of each rust removing rotating shaft, a compression spring is installed in each telescopic groove, a telescopic rotating shaft is installed at one end of each compression spring, a steel wire rust removing wheel is installed at the upper end of each telescopic rotating shaft, a first bevel gear is installed at the lower end of each rust removing rotating shaft, an inner gear groove guide rail is installed at one side inside the annular rust removing seat, fixed baffles are arranged at two sides of the annular rust removing seat, the two fixed baffles are connected through a fixed support, a sliding groove is formed in the outer end of the side surface of one side of each fixed baffle, a plurality of, the novel rust removing device is characterized in that balls are installed in the ball grooves, two ends of the ring-shaped rust removing seat are inserted into the sliding grooves, the ring-shaped rust removing seat is movably connected with the balls, a hollow shaft motor is installed at the center of the side surface of the fixed baffle, a bevel gear II is installed at the rotating end of one of the hollow shaft motors and is meshed with the bevel gear I, a rotating gear is installed at the rotating end of the other hollow shaft motor, a transmission bearing is arranged below the other hollow shaft motor, a transmission rotating shaft is installed in the transmission bearing, a small transmission gear is installed on the transmission rotating shaft and is meshed with the inner gear groove guide rail, a large transmission gear is installed on one side of the small transmission gear, and the large transmission gear is meshed with the rotating gear.
Automatic adjust the mobile device include the opposite side surface center department of fixed stop installs electric telescopic handle, circular fixing base is installed to electric telescopic handle's flexible end, install three little electric telescopic handle on the circular fixing base, little electric telescopic handle evenly distributed is on circular fixing base, the arc supporting seat is installed to little electric telescopic handle's flexible end, arc supporting seat side surface center department opens has the regulation recess, it has big compression spring to adjust recess internally mounted, the sliding seat is installed to big compression spring's upper end, install the sliding shaft on the sliding seat, install the movable pulley on the sliding shaft.
The two hollow shaft motors rotate in opposite directions.
The telescopic rotating shaft is connected with the derusting rotating shaft through a limiting groove and a limiting boss.
And anti-skid grains are arranged on the side surface of the arc-shaped supporting seat.
The sliding wheel can be completely retracted in the adjustment groove.
The camera is installed in one side surface center department of one of them arc supporting seat, install the LED light above the camera.
And a recovery rope is arranged on the other arc-shaped supporting seat.
Utilize the technical scheme of the utility model a building steel pipe inner wall rust cleaning device of preparation:
the rust removing device can rapidly and effectively remove rust on the inner wall of a steel pipe by rotating the annular rust removing seat and matching with the high-speed rotation of the steel wire rust removing wheel, can effectively increase the rotating speed of the steel wire rust removing wheel by the opposite rotating directions of the two hollow shaft motors, can more powerfully remove rust on the steel wire rust removing wheel, and can facilitate the wiring of the device and a controller by using the hollow shaft motors, thereby remotely controlling the operation of the device;
this rust cleaning device drives the arc supporting seat through little electric telescopic handle's the flexible strutting arrangement that carries on, and two electric telescopic handle's of rethread are flexible mutually supported, make ring shape rust cleaning seat can carry out the uniform velocity and remove to rust cleaning the steel pipe inner wall automatically, through the design of big compression spring and movable pulley, can make the arc fixing base can slide with the steel pipe inner wall, thereby make things convenient for the device's removal.
Drawings
FIG. 1 is a schematic structural view of a rust removing device for the inner wall of a building steel pipe according to the present invention;
FIG. 2 is a schematic view of the ring-shaped rust removing seat of the utility model;
FIG. 3 is a schematic view of the rust removing shaft of the present invention;
fig. 4 is a schematic view of the fixed stop of the present invention;
in the figure, 1, a circular rust removing seat; 2. a controller; 3. derusting the holes; 4. derusting the bearing; 5. derusting the rotating shaft; 6. a telescopic groove; 7. a compression spring; 8. a telescopic rotating shaft; 9. a steel wire derusting wheel; 10. a first bevel gear; 11. an inner gear groove guide rail; 12. fixing a baffle plate; 13. fixing a bracket; 14. a sliding groove; 15. a ball groove; 16. a ball bearing; 17. a hollow shaft motor; 18. a second bevel gear; 19. a rotating gear; 20. a drive bearing; 21. a transmission rotating shaft; 22. a small drive gear; 23. a large transmission gear; 24. an electric telescopic rod; 25. a circular fixing seat; 26. a small electric telescopic rod; 27. an arc-shaped supporting seat; 28. adjusting the groove; 29. a large compression spring; 30. a sliding seat; 31. a sliding shaft; 32. a sliding wheel; 33. a limiting groove; 34. a limiting boss; 35. a camera; 36. an LED lighting lamp; 37. and (6) recovering the rope.
Detailed Description
The invention is described in detail below with reference to the accompanying drawings, as shown in fig. 1-4, in this embodiment:
in this device, the device supplies power through being connected with external power source, external power source and controller 2, quill shaft motor 17, electronic shouting who said 24, little electric telescopic handle 26, camera 35 and 36 electric connection of LED light supply power, controller 2's model is the PLC controller of FX2N-8EX model, controller 2's control signal output part pass through the relay respectively with quill shaft motor 17, electronic shouting who said 24, little electric telescopic handle 26, camera 35 and 36 electric connection of LED light, controller 2's signal receiving end and camera 35 electric connection, thereby control the operation of whole device.
The invention is characterized in that the structure design of the rotary rust removing device is combined with an attached drawing 1, an attached drawing 2, an attached drawing 3 and an attached drawing 4, the rotary rust removing device comprises a circular rust removing seat 1, a plurality of rust removing holes 3 are formed in the circular rust removing seat 1, the rust removing holes 3 are uniformly distributed on the circular rust removing seat 1, a rust removing bearing 4 is arranged in each rust removing hole 3, a rust removing rotating shaft 5 is arranged in each rust removing bearing 4, a telescopic groove 6 is formed in the upper end of each rust removing rotating shaft 5, a compression spring 7 is arranged in each telescopic groove 6, a telescopic rotating shaft 8 is arranged at one end of each compression spring 7, a steel wire rust removing wheel 9 is arranged at the upper end of each telescopic rotating shaft 8, a bevel gear I10 is arranged at the lower end of each rust removing rotating shaft 5, an inner gear groove guide rail 11 is arranged at one side in each circular rust removing seat 1, the inner side surface of the sliding groove 14 is provided with a plurality of ball grooves 15, the ball grooves 15 are uniformly distributed in the sliding groove 14, balls 16 are arranged in the ball grooves 15, two ends of a circular rust removing seat 1 are inserted into the sliding groove 14, the circular rust removing seat 1 is movably connected with the balls 16, a hollow shaft motor 17 is arranged at the center of the side surface of the fixed baffle 12, the rotating directions of the two hollow shaft motors 17 are opposite, a bevel gear II 18 is arranged at the rotating end of one hollow shaft motor 17, the bevel gear II 18 is meshed with a bevel gear I10, a rotating gear 19 is arranged at the rotating end of the other hollow shaft motor 17, a transmission bearing 20 is arranged below the other hollow shaft motor 17, a transmission rotating shaft 21 is arranged in the transmission bearing 20, a small transmission gear 22 is arranged on the transmission rotating shaft 21, the small transmission gear 22 is meshed with the inner gear groove guide rail 11, and a large transmission gear 23, the large transmission gear 23 is meshed with the rotating gear 19; through the sliding fit of ring shape rust cleaning seat 1 and two fixed stop 12, thereby make ring shape rust cleaning seat 1 can rotate, set up telescopic steel wire rust cleaning wheel 9 on ring shape rust cleaning seat 1 simultaneously, thereby can remove the rust to the steel pipe inner wall fast, guarantee the cleanliness factor of rust cleaning, through two quill shaft motor 17 opposite of direction of rotation, can increase steel wire rust cleaning wheel 9 and rotate the dynamics, thereby make steel wire rust cleaning wheel 9 can more efficient remove the rust, and remove the rust through steel wire rust cleaning wheel 9, can effectually guarantee that steel pipe itself is not damaged, the intensity of steel pipe itself has been guaranteed.
The invention is characterized in that the automatic adjusting and moving device is structurally designed, and is combined with an attached drawing 1, the automatic adjusting and moving device comprises a fixed baffle 12, an electric telescopic rod 24 is installed at the center of the side surface of the other side of the fixed baffle 12, a round fixed seat 25 is installed at the telescopic end of the electric telescopic rod 24, three small electric telescopic rods 26 are installed on the round fixed seat 25, the small electric telescopic rods 26 are uniformly distributed on the round fixed seat 25, an arc-shaped supporting seat 27 is installed at the telescopic end of the small electric telescopic rod 26, an adjusting groove 28 is formed at the center of the side surface of the arc-shaped supporting seat 27, a large compression spring 29 is installed inside the adjusting groove 28, a sliding seat 30 is installed at the upper end of the large compression spring 29; through the flexible of little electric telescopic handle 26, the flexible of the movable pulley 32 in the cooperation arc supporting seat 27 again, thereby make arc supporting seat 27 can fix with the steel pipe inner wall, can slide on the steel pipe inner wall again, thereby made things convenient for the fixed and slip of device, flexible through the alternating expression of two electric telescopic handle 24, thereby remove to the device and provide power, make the device can be automatic remove in the steel pipe, make things convenient for the clearance of steel pipe inner wall, the volume of device is less simultaneously, the carrying of staff has been made things convenient for.
The working principle of the device is as follows: the device is suitable for removing rust on the inner walls of steel pipes with large, medium and small pipe diameters, and can not be used for smaller steel pipes due to the volume of the device;
when the steel pipe is derusted, a worker manually inserts one end of the device, which comprises the camera 35 and the LED illuminating lamp 36, into the steel pipe, inserts the steel wire derusting wheel 9 into one end of the steel pipe, connects the device with an external power supply at the moment, controls the small electric telescopic rod 26 to extend out, enables the small electric telescopic rod 26 to extend out to prop the arc-shaped supporting seat 27 onto the inner wall of the steel pipe, and enables the sliding wheel 32 to be in contact with the inner wall of the steel pipe through the elasticity of the large compression spring 29;
at the moment, the two hollow shaft motors 17 are controlled to start working, wherein one hollow shaft motor 17 rotates to drive the rotary gear 19 to rotate, the rotary gear 19 rotates to drive the large transmission gear 23 to rotate, so that the transmission rotating shaft 21 starts to rotate, the transmission rotating shaft 21 drives the small transmission gear 22 to rotate, and the annular rust removing seat 1 rotates between the two fixed baffles 12 through meshing of the small transmission gear 22 and the inner gear groove guide rail 11;
the annular rust removing seat 1 is in sliding contact with the sliding groove 14, and under the action of the balls 16, the annular rust removing seat 1 can rotate between the two fixed baffles 12, and the annular rust removing seat 1 rotates to drive the rust removing steel wire wheel 9 to rotate;
simultaneously, the other hollow shaft motor 17 rotates, the derusting rotating shaft 5 starts to rotate through the engagement of the second bevel gear 18 and the first bevel gear 10, the derusting rotating shaft 5 rotates to enable the telescopic rotating shaft 8 to start to rotate through the action of the limiting groove 33 and the limiting boss 34, meanwhile, the telescopic rotating shaft 8 enables the steel wire derusting wheel 9 to be in full contact with the inner wall of the steel pipe through the pressure of the compression spring 7, and the steel wire derusting wheel 9 starts to rotate at a high speed through the rotation of the telescopic rotating shaft 8;
the rotation direction of the annular rust removing seat 1 enables the bevel gear I10 to slowly rotate around the bevel gear II 18, so that when the other hollow shaft motor 17 rotates, the rotation pressure of the other hollow shaft motor 17 can be effectively reduced, the steel wire rust removing wheel 9 can rotate at a higher speed, and the stability of rust removal on the inner wall of the steel pipe is ensured;
when the steel wire derusting wheel 9 rotates, a worker manually pushes the circular fixing seat 25 at the other end to move, so that the device slowly moves into the steel pipe, and after the device completely enters the steel pipe, the small electric telescopic rod 26 on the circular fixing seat 25 at one end of the control camera 35 and the LED illuminating lamp 36 extends out again, so that the arc-shaped supporting seat 27 is in contact with the inner wall of the steel pipe, the circular fixing seat 25 is fixed, and meanwhile, the sliding wheel 32 contracts into the adjusting groove 28;
controlling the corresponding electric telescopic rod 24 to start to contract at the moment, and moving the annular rust removing seat 1 along with the contraction of the electric telescopic rod 24 so as to drive the steel wire rust removing wheel 9 to translate and remove rust of a steel pipe, and controlling the electric telescopic rod 24 on the other fixed baffle plate 12 to start to contract synchronously when the electric telescopic rod 24 contracts;
after the two electric telescopic rods 24 are completely contracted, controlling the small electric telescopic rod 26 on the circular fixed seat 25 at one side of the other electric telescopic rod 24 to extend out, so that the other circular fixed seat 25 is fixed with the inner wall of the steel pipe through the arc-shaped supporting seat 27, and the small electric telescopic rods 26 on the circular fixed seats 25 at one ends of the camera 35 and the LED illuminating lamp 36 are simultaneously contracted, so that the front end of the device is loosened;
at the moment, the two electric telescopic rods 24 are controlled to extend out, so that the annular rust removing seat 1 moves through the extension of the electric telescopic rods 24, and the device can continuously move in the steel pipe by repeating the moving steps, so that the inner wall of the whole steel pipe is subjected to rust removal;
after the rust removal is finished, the small electric telescopic rod 26 is controlled to contract in a small range, so that the sliding wheel 32 is in contact with the inner wall of the steel pipe, and the device is recovered under the action of a recovery rope 37;
the staff is at the rust cleaning in-process, and the inside condition of steel pipe is observed to accessible camera 35, and the preventing device removal is obstructed, provides the illumination through LED light 36, makes things convenient for the staff to observe.
Above-mentioned technical scheme has only embodied the utility model discloses technical scheme's preferred technical scheme, some changes that this technical field's technical personnel probably made to some parts wherein have all embodied the utility model discloses a principle belongs to within the protection scope of the utility model.
Claims (8)
1. A rust removal device for the inner wall of a building steel pipe comprises an annular rust removal seat (1), wherein a controller (2) is arranged outside the annular rust removal seat (1), and the rust removal device is characterized in that a rotary rust removal device is arranged on the annular rust removal seat (1), and automatic adjusting and moving devices are arranged on two sides of the rotary rust removal device;
the rotary type rust removing device comprises a plurality of rust removing holes (3) which are formed in a ring-shaped rust removing seat (1), the rust removing holes (3) are uniformly distributed in the ring-shaped rust removing seat (1), a rust removing bearing (4) is installed in the rust removing hole (3), a rust removing rotating shaft (5) is installed in the rust removing bearing (4), a telescopic groove (6) is formed in the upper end of the rust removing rotating shaft (5), a compression spring (7) is installed inside the telescopic groove (6), a telescopic rotating shaft (8) is installed at one end of the compression spring (7), a steel wire rust removing wheel (9) is installed at the upper end of the telescopic rotating shaft (8), a bevel gear I (10) is installed at the lower end of the rust removing rotating shaft (5), an inner gear groove guide rail (11) is installed on one side inside the ring-shaped rust removing seat (1), and fixing baffle plates, the two fixed baffles (12) are connected through a fixed support (13), the outer end of the side surface of one side of each fixed baffle (12) is provided with a sliding groove (14), the inner side surface of each sliding groove (14) is provided with a plurality of ball grooves (15), the ball grooves (15) are uniformly distributed in the sliding grooves (14), balls (16) are arranged in the ball grooves (15), two ends of a circular derusting seat (1) are inserted into the sliding grooves (14), the circular derusting seat (1) is movably connected with the balls (16), a hollow shaft motor (17) is arranged at the center of the side surface of each fixed baffle (12), a second bevel gear (18) is arranged at the rotating end of one hollow shaft motor (17), the second bevel gear (18) is meshed with the first bevel gear (10), and a rotating gear (19) is arranged at the rotating end of the other hollow shaft motor (17), the below of another hollow shaft motor (17) is equipped with drive bearing (20), install transmission pivot (21) in drive bearing (20), install little drive gear (22) on transmission pivot (21), little drive gear (22) and internal gear groove guide rail (11) interlock mutually, big drive gear (23) are installed to little drive gear (22) one side, big drive gear (23) and rotary gear (19) interlock mutually.
2. The rust removing device for the inner wall of the building steel pipe as claimed in claim 1, wherein the automatic adjusting and moving device comprises a fixed baffle plate (12) and an electric telescopic rod (24) installed at the center of the side surface at the other side, a round fixed seat (25) installed at the telescopic end of the electric telescopic rod (24), three small electric telescopic rods (26) installed on the round fixed seat (25), the small electric telescopic rods (26) are uniformly distributed on the round fixed seat (25), an arc-shaped supporting seat (27) is installed at the telescopic end of the small electric telescopic rod (26), an adjusting groove (28) is opened at the center of the side surface of the arc-shaped supporting seat (27), a large compression spring (29) is installed inside the adjusting groove (28), a sliding seat (30) is installed at the upper end of the large compression spring (29), and a sliding shaft (31) is installed on the sliding seat (30), and a sliding wheel (32) is arranged on the sliding shaft (31).
3. The rust removing device for the inner wall of the construction steel pipe as claimed in claim 1, wherein the two hollow shaft motors (17) have opposite rotation directions.
4. The rust removing device for the inner wall of the building steel pipe as claimed in claim 1, wherein the telescopic rotating shaft (8) is connected with the rust removing rotating shaft (5) through a limiting groove (33) and a limiting boss (34).
5. The rust removing device for the inner wall of the building steel pipe as claimed in claim 2, wherein the side surface of the arc-shaped supporting seat (27) is provided with anti-slip lines.
6. The rust removing device for the inner wall of the steel pipe of the building as claimed in claim 2, wherein the sliding wheel (32) can be completely retracted in the adjusting groove (28).
7. The rust removing device for the inner wall of the building steel pipe as claimed in claim 2, wherein a camera (35) is mounted at the center of the side surface of one side of one of the arc-shaped supporting seats (27), and an LED illuminating lamp (36) is mounted above the camera (35).
8. The rust removing device for the inner wall of the building steel pipe as claimed in claim 2, wherein the other arc-shaped supporting seat (27) is provided with a recovery rope (37).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921269166.8U CN210255619U (en) | 2019-08-07 | 2019-08-07 | Building steel pipe inner wall rust cleaning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921269166.8U CN210255619U (en) | 2019-08-07 | 2019-08-07 | Building steel pipe inner wall rust cleaning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210255619U true CN210255619U (en) | 2020-04-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921269166.8U Expired - Fee Related CN210255619U (en) | 2019-08-07 | 2019-08-07 | Building steel pipe inner wall rust cleaning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210255619U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111702640A (en) * | 2020-07-17 | 2020-09-25 | 缪静 | Pipeline inner wall rust cleaning device |
| CN112139985A (en) * | 2020-09-28 | 2020-12-29 | 开封大学 | Deburring device for machining |
| CN112276737A (en) * | 2020-10-28 | 2021-01-29 | 徐育杰 | Grinding head for grinding wind impeller in combustion equipment |
| CN112548708A (en) * | 2020-12-03 | 2021-03-26 | 张家港台达机械制造有限公司 | Mechanical polishing device for round bent pipe |
| CN113118947A (en) * | 2021-04-21 | 2021-07-16 | 西安石油大学 | Pipe maintenance device capable of removing corrosion rust of gully on inner wall |
| CN114683119A (en) * | 2022-04-02 | 2022-07-01 | 江南造船(集团)有限责任公司 | Inside welding seam processing apparatus of butt joint pipeline |
-
2019
- 2019-08-07 CN CN201921269166.8U patent/CN210255619U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111702640A (en) * | 2020-07-17 | 2020-09-25 | 缪静 | Pipeline inner wall rust cleaning device |
| CN112139985A (en) * | 2020-09-28 | 2020-12-29 | 开封大学 | Deburring device for machining |
| CN112276737A (en) * | 2020-10-28 | 2021-01-29 | 徐育杰 | Grinding head for grinding wind impeller in combustion equipment |
| CN112548708A (en) * | 2020-12-03 | 2021-03-26 | 张家港台达机械制造有限公司 | Mechanical polishing device for round bent pipe |
| CN113118947A (en) * | 2021-04-21 | 2021-07-16 | 西安石油大学 | Pipe maintenance device capable of removing corrosion rust of gully on inner wall |
| CN113118947B (en) * | 2021-04-21 | 2022-05-27 | 西安石油大学 | Pipe maintenance device capable of removing corrosion rust of gully on inner wall |
| CN114683119A (en) * | 2022-04-02 | 2022-07-01 | 江南造船(集团)有限责任公司 | Inside welding seam processing apparatus of butt joint pipeline |
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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: 20200407 Termination date: 20200807 |
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| CF01 | Termination of patent right due to non-payment of annual fee |