CN108262276B - Screw hole automatic cleaning device of evaporator manhole - Google Patents
Screw hole automatic cleaning device of evaporator manhole Download PDFInfo
- Publication number
- CN108262276B CN108262276B CN201611259189.1A CN201611259189A CN108262276B CN 108262276 B CN108262276 B CN 108262276B CN 201611259189 A CN201611259189 A CN 201611259189A CN 108262276 B CN108262276 B CN 108262276B
- Authority
- CN
- China
- Prior art keywords
- manhole
- evaporator
- shaped plate
- brush
- shaft seat
- 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.)
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Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 69
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- 239000004744 fabric Substances 0.000 claims description 14
- 230000000903 blocking effect Effects 0.000 claims description 7
- 239000004677 Nylon Substances 0.000 claims description 4
- 229920001778 nylon Polymers 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 208000019155 Radiation injury Diseases 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000003749 cleanliness Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001680 brushing effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
- B08B1/12—Brushes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/30—Cleaning by methods involving the use of tools by movement of cleaning members over a surface
- B08B1/32—Cleaning by methods involving the use of tools by movement of cleaning members over a surface using rotary cleaning members
Landscapes
- Cleaning In General (AREA)
Abstract
The invention relates to the technical field of detection and maintenance of steam generators, and particularly discloses an automatic screw hole cleaning device for an evaporator manhole. In the device, a Y-shaped plate is fixed on a manhole flange of an evaporator to form a main supporting structure, a guide rod air cylinder is fixedly arranged on the Y-shaped plate through a connecting seat, and the guide rod plate of the guide rod air cylinder is positioned above the Y-shaped plate and can move in a telescopic way relative to the Y-shaped plate; the upper end of a guide rod plate of the guide rod cylinder is connected with the electric rotator through a connecting plate, a rotating bracket is arranged on a rotating disc of the electric rotator, a motor and a speed reducer are arranged at the end part of the rotating bracket, an output shaft at the lower end of the speed reducer is downward and is connected with a cleaning brush through a quick socket, and the motor drives the cleaning brush to rotate so as to clean a screw hole of a manhole of an evaporator. The device simple operation, operating efficiency are high, but remote control effectively reduces on-the-spot operating personnel's intensity of labour especially nuclear radiation injury.
Description
Technical Field
The invention belongs to the technical field of detection and maintenance of steam generators, and particularly relates to an automatic screw hole cleaning device for a manhole of an evaporator.
Background
When the evaporator is detected, maintained and repaired, the manhole flange screw hole is required to be cleaned simultaneously, and in the field of the detection, maintenance and repair equipment of the evaporator, no automatic cleaning equipment for the manhole flange screw hole exists.
At present, the manhole flange screw hole is cleaned by adopting a manual operation method, and an operator holds a brush, cleaning cloth and other cleaning tools to finish cleaning operation. The on-site working environment is poor, the workload is large, the time consumption is long, and the cleanliness of the manhole flange screw holes cannot be guaranteed to meet the requirements. Particularly in nuclear power plants, the evaporator site has stronger nuclear radiation, even in high-temperature environments, which causes injury to operators.
Disclosure of Invention
The invention aims to provide an automatic screw hole cleaning device for an evaporator manhole, which solves the problem of cleaning the screw hole of a manhole flange of an existing steam generator and effectively reduces the injury of field operators.
The technical scheme of the invention is as follows: the utility model provides a screw self-cleaning device of evaporimeter manhole, the device includes Y shaped plate, runing rest, guide arm cylinder, electronic circulator, quick socket and cleaning brush, and wherein, Y shaped plate is fixed on the evaporimeter manhole flange and is formed the main support structure, and guide arm cylinder passes through the connection seat fixed mounting on Y shaped plate, and the guide arm board of guide arm cylinder is located Y shaped plate top to but relative Y shaped plate telescopic movement; the upper end of a guide rod plate of the guide rod cylinder is connected with the electric rotator through a connecting plate, a rotating bracket is arranged on a rotating disc of the electric rotator, a motor and a speed reducer are arranged at the end part of the rotating bracket, an output shaft at the lower end of the speed reducer is downward and is connected with a cleaning brush through a quick socket, and the motor drives the cleaning brush to rotate so as to clean a screw hole of a manhole of an evaporator.
The rotary support is provided with a positioning block for positioning the rotary support on the rotary disc of the electric rotator.
The output shaft of the speed reducer passes through the upper end of the end part of the rotating bracket and is matched and fixed with the shaft seat, the shaft seat is fixed with the quick socket, and the cleaning brush can be conveniently detached and connected with the quick socket.
The quick socket comprises a blocking block, a spring, a pin, a spring sleeve and a shaft seat, one end of the shaft seat is matched with the end part of an output shaft of the speed reducer, and the shaft seat is fixed with the output shaft of the speed reducer through the blocking block, the spring and the pin; the outer part of the shaft seat is sleeved with a spring sleeve, a spring is arranged in an annular space formed between the shaft seat and the spring sleeve, the spring sleeve can compress the spring and move relative to the shaft seat, so that a symmetrical hole on the side wall of the other end of the shaft seat is aligned with a groove on the spring sleeve, and the steel balls are fixed in the symmetrical hole on the side wall of the shaft seat through a clamping ring and partially slide into the groove of the spring sleeve when being extruded.
The radial positions of the speed reducers at the two ends of the rotating support can be adjusted by 500-650 mm.
The electric rotator and the rotary bracket form a rotary indexing mechanism, and the rotary indexing mechanism can be positioned and indexed at will according to the positions of screw holes of the flange surface of the manhole of the evaporator.
The lower end surface of the Y-shaped plate is provided with a guide pad, and the wedge-shaped conical surface of the guide pad ensures that the guide pad has a guiding and positioning function when the Y-shaped plate is installed, so that the axis of the automatic cleaning device is concentric with the center line of the manhole; the guide pad is made of nonmetallic nylon, the surface of the manhole flange of the evaporator cannot be scratched, and running vibration and other impacts are effectively eliminated.
The end part of the brush shaft of the cleaning brush is matched with the inner diameter of the shaft seat, a semicircular groove is formed in the end part of the cleaning brush, the end part of the cleaning brush is inserted into the shaft seat, the end part of the cleaning brush is clamped through steel balls, and the cleaning brush is quickly connected with the quick socket.
The cleaning brush cloth brush and the steel wire brush are fixed on the cloth brush shaft, and the steel wire brush is fixed on the steel wire brush shaft through a nut; the wire brush or the cloth brush can perform both strong and flexible cleaning.
The Y-shaped plate is of a Y-shaped frame structure matched with the manhole flange of the evaporator in size, and is fixed on 3-M16 screw holes of the manhole flange of the evaporator through screws and M6 screws to form a main supporting structure.
The invention has the remarkable effects that: the automatic screw hole cleaning device for the evaporator manhole has the following advantages: 1. the device is convenient to operate, high in operation efficiency and capable of being controlled remotely, and the labor intensity of field operators, especially nuclear radiation injury, is effectively reduced; 2. the device has compact and simple integral structure, is light and convenient, and can be quickly assembled and disassembled with the manhole flange surface of the evaporator by 1-2 persons on site; 3. after the cleaning device is installed, the cleaning device can be started to operate by operating the electric and pneumatic knobs of the control box, and cleaning operations of all screw holes are automatically finished one by one; 4. the guide pad of the device is made of nylon materials, has concentric guide positioning function during installation, can not scratch the surface of the manhole flange of the evaporator, and effectively eliminates operation vibration and other impacts; 5. the device can be used for adjusting the center distance of the two cleaning brush shafts, the indexing value and the starting position of the electric rotator according to the hole pitch diameter and the number of manhole flange screw holes of various evaporators, the cleaning operation is completed, the application range is wide 6, the device is provided with the steel wire brush and the cloth brush, and the device can be used for simultaneously performing the dual cleaning of the strength and the flexibility so as to effectively remove dirt, sundries, greasy dirt and the like, and meet the requirement of the cleanliness of the manhole flange screw holes.
Drawings
FIG. 1 is a schematic view of an automatic screw hole cleaning device for an evaporator manhole according to the present invention;
fig. 2 is a schematic diagram of a screw hole automatic cleaning device for an evaporator manhole in a primary side manhole installation structure of an evaporator;
fig. 3 is a schematic diagram of an installation structure of an automatic screw hole cleaning device for an evaporator manhole on a secondary side of the evaporator;
FIG. 4 is a schematic view of the quick socket of FIG. 1;
FIG. 5 is a schematic view of the wire brush of FIG. 1;
FIG. 6 is a schematic view of the structure of the brush of FIG. 1;
in the figure: 1. a Y-shaped plate; 2. a rotating bracket; 3. brushing cloth; 4. a brush shaft is arranged; 5. a connecting plate; 6. a positioning block; 7. a connecting seat; 8. a guide pad; 9. a wire brush; 10. a steel wire brush shaft; 11. a shaft seat; 12. blocking; 13. a spring; 14. a pin; 15. a spring; 16. a spring sleeve; 17. a shaft seat; 18. a screw; 19. m6 screw; 20. a nut; 21. a speed reducer; 22. a motor; 23. a guide rod cylinder; 24. an electric rotator; 25. steel balls; 26. and a collar.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings and specific examples.
As shown in fig. 1, the automatic screw hole cleaning device for the manhole of the evaporator comprises a Y-shaped plate 1, a rotating bracket 2, a guide rod air cylinder 23, an electric rotator 24, a quick socket and a cleaning brush, wherein the Y-shaped plate 1 is of a Y-shaped frame structure matched with the size of a flange of the manhole of the evaporator, the Y-shaped plate 1 is fixed on 3-M16 screw holes of the flange of the manhole of the evaporator through screws 18 and M6 screws 19 to form a main supporting structure, the guide rod air cylinder 23 is fixedly arranged on the Y-shaped plate 1 through a connecting seat 7, and the guide rod plate of the guide rod air cylinder 23 is positioned above the Y-shaped plate 1 and can move in a telescopic manner relative to the Y-shaped plate 1; the upper end of a guide rod plate of the guide rod air cylinder 23 is connected with an electric rotator 24 through a connecting plate 5, a rotary bracket 2 is arranged on a rotary disc of the electric rotator 24 and positioned through a positioning block 6, and the electric rotator 24 and the rotary bracket 2 form a rotary indexing mechanism which can be positioned and indexed at will according to the screw hole position of a manhole flange surface of an evaporator; the distance between the two ends of the rotating bracket 2 and the rotating disc of the electric rotator 24 is equal, a motor 22 and a miniature speed reducer 21 are arranged on the rotating bracket 2, the radial position of the speed reducer 21 at the two ends of the rotating bracket 2 can be adjusted by 500-650 mm, the output shaft at the lower end of the miniature speed reducer 21 is downward and is connected with a cleaning brush through a quick socket, and a guide rod cylinder 23 is controlled to enable a guide rod plate to stretch and retract relative to the Y-shaped plate 1 and drive the cleaning brush at the two ends of the rotating bracket 2 to enter or exit a screw hole; the lower end surface of the Y-shaped plate 1 is provided with a guide pad 8, and the wedge-shaped conical surface of the guide pad enables the Y-shaped plate 1 to obtain guiding and positioning effects when being installed, so that the axis of the automatic cleaning device is concentric with the center line of the manhole. The guide pad is made of nonmetallic nylon, has affinity with the evaporator manhole, meets the material element requirements of the nuclear power station on the intervention equipment, does not scratch the flange surface of the evaporator manhole, and effectively eliminates operation vibration and other impacts.
As shown in fig. 4, an output shaft of a speed reducer 21 installed on a motor 22 passes through the end part of a rotating bracket 2, so that the output of the speed reducer 21 is fixedly connected with a shaft seat 11 in a matching way, the shaft seat 11 is quickly assembled with a cleaning brush through a quick socket, wherein the quick socket comprises a blocking block 12, a spring 13, a pin 14, a spring 15, a spring sleeve 16 and a shaft seat 17, the spring sleeve 16 is sleeved outside the shaft seat 17, the spring 15 is installed in an annular space formed between the shaft seat 17 and the spring sleeve 16, the spring sleeve 16 can compress the spring 15 and move relative to the shaft seat 17, symmetrical holes on the side wall of the shaft seat 17 are aligned with grooves on the spring sleeve 16, and steel balls 25 are fixed in the symmetrical holes on the side wall of the shaft seat 17 through a clamping ring 26 and partially slide into the grooves of the spring sleeve 16 when being extruded; the other end of the shaft seat 17 is matched with the end part of the output shaft of the speed reducer 21, and the shaft seat 17 is fixed with the output shaft of the speed reducer 21 through the blocking block 12, the spring 13 and the pin 14; the end part of the brush shaft of the cleaning brush is matched with the inner diameter of the shaft seat 17, a semicircular groove is arranged at the end part of the cleaning brush, the end part of the cleaning brush is inserted into the shaft seat 17, the end part of the cleaning brush is clamped by a steel ball 25, and the cleaning brush is quickly connected with a quick socket; as shown in fig. 5 and 6, the cleaning brush comprises a cloth brush 3 and a wire brush 9, wherein the cloth brush 3 is fixed on a cloth brush shaft 4, and the wire brush 9 is fixed on a wire brush shaft 10 through a nut 20; the steel wire brush 9 or the cloth brush 3 can be used for simultaneously performing strong and flexible double cleaning so as to effectively remove dirt, sundries, oil stains and the like and meet the requirement of the manhole flange screw hole cleanliness.
As shown in fig. 2 and 3, the radial distance between the cleaning brushes at the two ends of the rotary support 2 can be adjusted for the primary manhole and the secondary manhole of the evaporator, and the cleaning of each screw hole is realized by controlling the indexing through the electric rotator 24, the automatic cleaning device is connected with the power supply and the air source of the control box through the power line and the air source pipe, and an operator can finish the cleaning of the manhole flange screw hole away from the site operation of the evaporator, so that the labor intensity of the site operator, especially the nuclear radiation injury is effectively reduced.
Claims (6)
1. The utility model provides a screw self-cleaning device of evaporimeter manhole which characterized in that: the device comprises a Y-shaped plate (1), a rotating bracket (2), a guide rod air cylinder (23), an electric rotator (24), a quick socket and a cleaning brush, wherein the Y-shaped plate (1) is fixed on a manhole flange of an evaporator to form a main supporting structure, the guide rod air cylinder (23) is fixedly arranged on the Y-shaped plate (1) through a connecting seat (7), and the guide rod plate of the guide rod air cylinder (23) is positioned above the Y-shaped plate (1) and can move in a telescopic way relative to the Y-shaped plate (1); the upper end of a guide rod plate of the guide rod cylinder (23) is connected with an electric rotator (24) through a connecting plate (5), a rotary bracket (2) is arranged on a rotary disc of the electric rotator (24), a motor (22) and a speed reducer (21) are arranged at the end part of the rotary bracket (2), an output shaft at the lower end of the speed reducer (21) is downward and connected with a cleaning brush through a quick socket, and the cleaning brush is driven to rotate through the motor (22) to clean screw holes of a manhole of an evaporator; the output shaft of the speed reducer (21) passes through the upper end of the end part of the rotating bracket (2) and is matched and fixed with the shaft seat (11), the shaft seat (11) is fixed with the quick socket, and the cleaning brush can be conveniently detached and connected with the quick socket; the quick socket comprises a blocking block (12), a spring (13), a pin (14), a spring (15), a spring sleeve (16) and a shaft seat (17), one end of the shaft seat (17) is matched with the end part of an output shaft of the speed reducer (21), and the shaft seat (17) is fixed with the output shaft of the speed reducer (21) through the blocking block (12), the spring (13) and the pin (14); the outside of the shaft seat (17) is sleeved with a spring sleeve (16), a spring (15) is arranged in an annular space formed between the shaft seat (17) and the spring sleeve (16), the spring sleeve (16) can compress the spring (15) and move relative to the shaft seat (17) so that a symmetrical hole on the side wall of the other end of the shaft seat (17) is aligned with a groove on the spring sleeve (16), and a steel ball (25) is fixed in the symmetrical hole on the side wall of the shaft seat (17) through a clamping ring (26) and partially slides into the groove of the spring sleeve (16) when being extruded; the electric rotator (24) and the rotary bracket (2) form a rotary indexing mechanism, and can be positioned and indexed at will according to the positions of screw holes of the flange surface of the manhole of the evaporator; the end part of the cleaning brush is matched with the inner diameter of the shaft seat (17), a semicircular groove is formed in the end part of the cleaning brush, the end part of the cleaning brush is inserted into the shaft seat (17), the end part of the cleaning brush is clamped by steel balls (25), and the cleaning brush is quickly connected with the quick socket; the Y-shaped plate (1) is of a Y-shaped frame structure matched with the manhole flange of the evaporator in size.
2. The automatic screw hole cleaning device for an evaporator manhole of claim 1, wherein: the rotary support (2) is provided with a positioning block (6) for positioning the rotary support (2) on the rotary disc of the electric rotator (24).
3. The automatic screw hole cleaning device for an evaporator manhole of claim 1, wherein: the radial positions of the speed reducers (21) at the two ends of the rotating support (2) can be adjusted by 500-650 mm.
4. The automatic screw hole cleaning device for an evaporator manhole of claim 1, wherein: the lower end surface of the Y-shaped plate (1) is provided with a guide pad (8), and the wedge-shaped conical surface of the guide pad enables the Y-shaped plate (1) to obtain a guide positioning effect when being installed, so that the axis of the automatic cleaning device is concentric with the center line of the manhole; the guide pad is made of nonmetallic nylon, the surface of the manhole flange of the evaporator cannot be scratched, and running vibration and impact are effectively eliminated.
5. The automatic screw hole cleaning device for an evaporator manhole of claim 1, wherein: the cleaning brush comprises a cloth brush (3) and a steel wire brush (9), wherein the cloth brush (3) is fixed on a cloth brush shaft (4), and the steel wire brush (9) is fixed on a steel wire brush shaft (10) through a nut (20); the steel wire brush (9) or the cloth brush (3) is simultaneously cleaned by both strength and flexibility.
6. The automatic screw hole cleaning device for an evaporator manhole of claim 1, wherein: the Y-shaped plate (1) is fixed on a screw hole of the evaporator manhole flange from 3 to M16 through a screw (18) and an M6 screw (19) to form a main supporting structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611259189.1A CN108262276B (en) | 2016-12-30 | 2016-12-30 | Screw hole automatic cleaning device of evaporator manhole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611259189.1A CN108262276B (en) | 2016-12-30 | 2016-12-30 | Screw hole automatic cleaning device of evaporator manhole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108262276A CN108262276A (en) | 2018-07-10 |
| CN108262276B true CN108262276B (en) | 2023-10-20 |
Family
ID=62754810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611259189.1A Active CN108262276B (en) | 2016-12-30 | 2016-12-30 | Screw hole automatic cleaning device of evaporator manhole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108262276B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111346855A (en) * | 2018-12-21 | 2020-06-30 | 核动力运行研究所 | Overhauling device and method for manhole flange surface of steam generator |
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|---|---|---|---|---|
| JPH1015505A (en) * | 1996-06-28 | 1998-01-20 | Mitsubishi Heavy Ind Ltd | Screw hole cleaning device |
| CN2338376Y (en) * | 1998-06-03 | 1999-09-15 | 李海沧 | Cleaning brush wheel for cleaning guard railings |
| JP2001121090A (en) * | 1999-10-25 | 2001-05-08 | Ishikawajima Harima Heavy Ind Co Ltd | Nut cleaning device |
| JP2002355617A (en) * | 2001-05-31 | 2002-12-10 | Mitsubishi Electric Corp | Hermetically sealed gas seal removing apparatus |
| KR20060057082A (en) * | 2004-11-23 | 2006-05-26 | 한전기공주식회사 | Volt hall cleaning device of a main flange |
| CN202070990U (en) * | 2011-03-02 | 2011-12-14 | 武汉深蓝自动化设备有限公司 | Automatic edge brushing machine for storage battery plate |
| CN202826970U (en) * | 2012-08-03 | 2013-03-27 | 江苏耀中铝车轮有限公司 | Easy-to-wash car wheel hub |
| CN203436302U (en) * | 2013-09-22 | 2014-02-19 | 浙江海洋学院 | Multifunctional cup inner wall cleaning machine |
| CN203875040U (en) * | 2014-04-11 | 2014-10-15 | 滨州盟威戴卡轮毂有限公司 | Flange center hole cleaner |
| CN205341351U (en) * | 2016-01-29 | 2016-06-29 | 江苏保捷锻压有限公司 | Flange axle screw thread belt cleaning device |
| CN206519372U (en) * | 2016-12-30 | 2017-09-26 | 核动力运行研究所 | A kind of screw automatic cleaning apparatus of evaporator manhole |
-
2016
- 2016-12-30 CN CN201611259189.1A patent/CN108262276B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1015505A (en) * | 1996-06-28 | 1998-01-20 | Mitsubishi Heavy Ind Ltd | Screw hole cleaning device |
| CN2338376Y (en) * | 1998-06-03 | 1999-09-15 | 李海沧 | Cleaning brush wheel for cleaning guard railings |
| JP2001121090A (en) * | 1999-10-25 | 2001-05-08 | Ishikawajima Harima Heavy Ind Co Ltd | Nut cleaning device |
| JP2002355617A (en) * | 2001-05-31 | 2002-12-10 | Mitsubishi Electric Corp | Hermetically sealed gas seal removing apparatus |
| KR20060057082A (en) * | 2004-11-23 | 2006-05-26 | 한전기공주식회사 | Volt hall cleaning device of a main flange |
| CN202070990U (en) * | 2011-03-02 | 2011-12-14 | 武汉深蓝自动化设备有限公司 | Automatic edge brushing machine for storage battery plate |
| CN202826970U (en) * | 2012-08-03 | 2013-03-27 | 江苏耀中铝车轮有限公司 | Easy-to-wash car wheel hub |
| CN203436302U (en) * | 2013-09-22 | 2014-02-19 | 浙江海洋学院 | Multifunctional cup inner wall cleaning machine |
| CN203875040U (en) * | 2014-04-11 | 2014-10-15 | 滨州盟威戴卡轮毂有限公司 | Flange center hole cleaner |
| CN205341351U (en) * | 2016-01-29 | 2016-06-29 | 江苏保捷锻压有限公司 | Flange axle screw thread belt cleaning device |
| CN206519372U (en) * | 2016-12-30 | 2017-09-26 | 核动力运行研究所 | A kind of screw automatic cleaning apparatus of evaporator manhole |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108262276A (en) | 2018-07-10 |
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