CN112121953A - Device and method for cutting metal wire-shaped foreign matters among tubes of steam generator - Google Patents
Device and method for cutting metal wire-shaped foreign matters among tubes of steam generator Download PDFInfo
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- CN112121953A CN112121953A CN202011007711.3A CN202011007711A CN112121953A CN 112121953 A CN112121953 A CN 112121953A CN 202011007711 A CN202011007711 A CN 202011007711A CN 112121953 A CN112121953 A CN 112121953A
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- Prior art keywords
- steam generator
- foreign matter
- wire
- cutting device
- cutting
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
- B02C18/0084—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating garbage, waste or sewage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
- B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
- B02C18/14—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
- B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
- B02C18/16—Details
- B02C18/18—Knives; Mountings thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
- B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
- B02C18/16—Details
- B02C18/24—Drives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F11/00—Cutting wire
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C2201/00—Codes relating to disintegrating devices adapted for specific materials
- B02C2201/06—Codes relating to disintegrating devices adapted for specific materials for garbage, waste or sewage
Abstract
The invention provides a cutting device for metal wire-shaped foreign matters among tubes of a steam generator, which comprises a rotary motor, a transmission flexible shaft, a shell pressing plate, an endoscope, a cutting blade, a transmission channel and a monitoring channel. The rotary motor is arranged at the leftmost end of the metal wire-shaped foreign matter cutting device between the steam generator tubes and is connected with the shell pressing plate on the right side through the transmission flexible shaft. Two through holes are drilled in the shell pressing plate and are respectively a transmission channel and a monitoring channel. The endoscope passes through the monitoring channel, and the transmission flexible shaft passes through the transmission channel. The outer side of the shell pressing plate is provided with a cutting blade. The invention also provides a cutting method using the device for cutting the metal wire-shaped foreign matters among the steam generator tubes. The invention can look directly at the shearing part and go in and out of a complex area, can cut off complex foreign matters and does not damage a heat transfer pipe.
Description
Technical Field
The invention belongs to the technical field of steam generator maintenance, and particularly relates to a device and a method for cutting metal wire-shaped foreign bodies among steam generator tubes.
Background
The Steam Generator (SG) is one of the main equipments of a primary circuit of a nuclear power plant, is an important pressure-bearing boundary of the primary circuit and plays a role in heat exchange of the primary circuit and the secondary circuit. The SG of domestic nuclear power stations mostly adopts a vertical natural circulation structural form, and a large number of vertically-arranged intensive U-shaped heat transfer pipes with extremely small intervals are arranged in the SG. In the process of overhauling a steam generator and a primary loop system of a nuclear power unit, foreign matters are often introduced into an SG and a water supply system due to the problem of insufficient control of the foreign matters. A small part of the foreign matters are discharged by the sewage system in the operation process; meanwhile, most of the water will be collected on the secondary side tube plate of the steam generator along with the flow of the water loop. The foreign matters possibly along with the operation of the steam generator are influenced by high-temperature and high-pressure environment on the surface of the tube plate of the SG secondary side and in the gaps of the tube bundle, so that the problems of abrasion of a heat transfer tube, reduction of heat efficiency, unstable water level and the like are caused.
The important significance and the necessity of SG foreign matter cleaning have been fully paid attention to in each nuclear power plant in China, some grabbing devices are put into practical application at present, and the following two metal wire-shaped foreign matter shearing methods can be generally adopted.
The method comprises the following steps: the transmission shaft drives the scissors to cut foreign matters
Document 1: [ Beam cloud thunder, Douguan, chenghui, gacong, liming, Qinling & Jijie. China/publication No.: CN 109556104 a/publication date: 2019.04.02 discloses a device for cutting strip-shaped foreign matters by a large force arm, wherein a cutting tool is fed into a narrow tube bundle tube room through a push-pull guide device, and power is transmitted through a motor and a transmission shaft to drive a pair of scissors.
The second method comprises the following steps: the transmission shaft drives the knife edge to push and pressurize to shear off foreign matters
Document 2: [ Xianshan, Liuyibo, Qinliao, Zhang Gaojian, Taoyuan, Maoguang, a steam generator intertube filamentous foreign body shearing tool. China/publication No.: CN 111346991 a/publication date: 2020.06.30 discloses a device for pressing and breaking strip-shaped foreign bodies by torque transmission pressing force, wherein a shearing tool is fed into a narrow tube bundle tube room through a push-pull guide device, and a motor and a transmission shaft transmit power to drive a knife edge.
However, these devices still have problems in field application, such as insufficient shear force, difficulty in cleaning the strip-shaped foreign matter wound on the heat transfer tubes or stuck between the tube bundles; the filamentous foreign matters are difficult to control to enter the effective shearing position of the shearing tool; or require complicated manual manipulation by the operator at the SG to expose the dose to a larger dose of ionizing radiation.
In view of the above problems, it is desirable to design an improved device and method for cleaning foreign matters between secondary side tubes of a steam generator.
Disclosure of Invention
The invention mainly aims to provide a device and a method for cutting metal wire-shaped foreign matters among tubes of a steam generator, which realize the purpose of shearing and loosening wound or stuck strip-shaped foreign matters.
The technical scheme adopted by the invention is as follows:
a cutting device for metal wire-shaped foreign matters among steam generator tubes comprises a rotary motor, a transmission flexible shaft, a shell pressing plate, an endoscope, a cutting blade, a transmission channel and a monitoring channel. The rotary motor is arranged at the leftmost end of the metal wire-shaped foreign matter cutting device between the steam generator tubes and is connected with the shell pressing plate on the right side through the transmission flexible shaft. Two through holes are drilled in the shell pressing plate and are respectively a transmission channel and a monitoring channel. The endoscope passes through the monitoring channel, and the transmission flexible shaft passes through the transmission channel. The outer side of the shell pressing plate is provided with a cutting blade.
The device for cutting the metal wire-shaped foreign matters among the steam generator tubes is also provided with a worm and a worm wheel.
The worm penetrates through the transmission channel and is connected with the transmission flexible shaft in a welding mode and used for protecting the worm from being freely rotated under the influence of the outside.
The worm wheel is a shaft with threads and is perpendicular to the worm. The worm wheel and the worm are engaged with a cylindrical thread, by which the direction of rotation is changed.
Two ends of the worm wheel are respectively welded with a cutting blade, and the grinding material of the cutting blade is silicon carbide.
The endoscope is arranged in the monitoring channel and used for conveying the endoscope to the cutting effect of the observable cutting blade.
The angle of the endoscope faces the cutting blade, and the endoscope has the functions of observing the position of the foreign body and cutting effect.
The speed and torque of the rotary motor are adjustable for providing shearing power.
The transmission flexible shaft is made of spring steel, can bear larger torque and can be started and stopped frequently, and is used for transmitting power.
In the use process, the rotating motor drives the transmission flexible shaft to rotate, the worm is driven to rotate in the transmission channel through rotation, and therefore the worm drives the worm wheel to rotate, and the cutting blade rotates to cut.
The invention also provides a cutting method using the device for cutting the metal wire-shaped foreign matters among the steam generator tubes, which comprises the following steps:
step 1: conveying the metal wire-shaped foreign matter cutting device between the tubes of the steam generator to the foreign matter in the steam generator;
step 2: conveying the endoscope to a proper position where the cutting blade can be observed through the monitoring channel;
step 2: the integral position of the wire-shaped foreign matter cutting device between the steam generator tubes is adjusted in real time through the endoscope, so that the cutting pieces are in contact with the foreign matters;
and 3, step 3: adjusting the rotating speed of the rotating motor according to the material and the size of the foreign matters; the rotating motor is started to rotate when being electrified, so that the rotating torque required by cutting is provided;
and 4, step 4: the rotating motor is connected with a transmission flexible shaft to rotate;
and 5, step 5: the transmission flexible shaft and the connected worm rotate in the monitoring channel;
and 6, step 6: the worm wheel is shifted to rotate by the meshing of the worm and the gear;
and 7, step 7: the worm wheel is concentrically connected with the cutting blade, and the rotary cutting blade cuts the foreign matters.
In the implementation process, the rotating speed of the rotating motor is adjustable according to actual requirements such as foreign matter materials, sizes and the like, and the cutting effect is guaranteed. The shell pressing plate can be replaced according to different evaporators, so that the front and back vibration and the left and right vibration generated in the implementation process are prevented, the cutting efficiency is improved, and the internal rotating parts of the tool, the tube plate of the steam generator and the heat transfer tube are protected in an isolation mode.
The beneficial effects obtained by the invention are as follows:
1) the integrated endoscope is used for directly viewing the shearing part without matching the endoscope with a shearing tool;
2) the design of the shell pressing plate does not damage the heat transfer pipe.
3) The flexible shaft transmission can be bent, and the flexible shaft transmission can enter and exit a complex area;
4) the cutting blade design can cut off complex foreign bodies.
Drawings
Fig. 1 is a front view of a wire-shaped foreign matter cutting device between tubes of a steam generator.
Wherein: 1 is a rotary motor; 2 is a flexible transmission shaft; 3 is a shell pressing plate; 4 is an endoscope; 5 is a worm; 6 is a worm wheel; 7 is a cutting sheet; 8 is a transmission channel; and 9 is a monitoring channel.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
As shown in figure 1, the invention provides a cutting device for metal wire-shaped foreign matters between steam generator tubes, which comprises a rotary motor 1, a transmission flexible shaft 2, a shell pressing plate 3, an endoscope 4, a cutting blade 7, a transmission channel 8 and a monitoring channel 9. The rotary motor 1 is arranged at the leftmost end of the metal wire-shaped foreign matter cutting device between the steam generator tubes and is connected with the shell pressing plate 3 on the right side through the transmission flexible shaft 2. Two through holes are drilled in the shell pressing plate 3, namely a transmission channel 8 and a monitoring channel 9. The endoscope 4 passes through the monitoring channel 9, and the transmission flexible shaft 2 passes through the transmission channel 8. The outer side of the housing press plate 3 is provided with a cutting blade 7.
The device for cutting the metal wire-shaped foreign matters among the steam generator tubes is also provided with a worm 5 and a worm wheel 6.
The worm 5 passes through the transmission channel 8 and is connected with the transmission flexible shaft 2 in a welding mode and used for protecting the worm 5 from being freely rotated under the influence of the outside.
The worm wheel 6 is a threaded shaft, arranged perpendicular to the worm 5. The worm wheel 6 and the worm 5 are engaged with a cylindrical screw thread by which the direction of rotation is changed.
Two ends of the worm wheel 6 are respectively welded with a cutting blade 7, and the abrasive material of the cutting blade 7 is silicon carbide.
The monitoring channel 9 is internally provided with an endoscope 4 for conveying the endoscope 4 to observe the cutting effect of the cutting blade 7.
The endoscope 4 is angled toward the cutting blade 7, and has the functions of observing the position of the foreign object and cutting effect.
The speed and torque of the rotary motor 1 are adjustable for providing shearing power.
The flexible transmission shaft 2 is made of spring steel, can bear large torque and can be started and stopped frequently, and is used for transmitting power.
In the use, the rotating motor 1 drives the transmission flexible shaft 2 to rotate, and the worm 5 is driven to rotate in the transmission channel through rotation, so that the worm drives the worm wheel to rotate, and the cutting blade rotates to cut.
The invention also provides a cutting method using the device for cutting the metal wire-shaped foreign matters among the steam generator tubes, which comprises the following steps:
step 1: conveying the metal wire-shaped foreign matter cutting device between the tubes of the steam generator to the foreign matter in the steam generator;
step 2: the endoscope 4 is conveyed to a proper position where the cutting blade 7 can be observed through the monitoring channel 9;
step 2: the integral position of the wire-shaped foreign matter cutting device between the steam generator tubes is adjusted in real time through the endoscope 4, so that the cutting blade 7 is in contact with the foreign matter;
and 3, step 3: the rotating speed of the rotating motor 1 is adjusted according to the material and the size of the foreign matters; the rotating motor 1 is started to rotate when being electrified, so that the rotating torque required by cutting is provided;
and 4, step 4: the rotating motor 1 is connected with a transmission flexible shaft 2 to rotate;
and 5, step 5: the transmission flexible shaft 2 and the connected worm 5 rotate in the monitoring channel 9;
and 6, step 6: the worm wheel 6 is toggled to rotate by the worm 5 through gear engagement;
and 7, step 7: the worm wheel 6 is concentrically connected with the cutting blade 7, and the rotary cutting blade 7 cuts foreign matters.
In the implementation process, the rotating speed of the rotating motor 1 is adjustable according to actual requirements such as foreign matter materials, sizes and the like, and the cutting effect is guaranteed. The shell pressing plate 3 can be replaced according to different evaporators, so that the front and back vibration and the left and right vibration generated in the implementation process are prevented, the cutting efficiency is improved, and the internal rotating parts of the tool, the tube plate of the steam generator and the heat transfer tube are protected in an isolation mode.
The beneficial effects obtained by the invention are as follows:
1) the integrated endoscope is used for directly viewing the shearing part without matching the endoscope with a shearing tool;
2) the design of the shell pressing plate does not damage the heat transfer pipe.
3) The flexible shaft transmission can be bent, and the flexible shaft transmission can enter and exit a complex area;
4) the cutting blade design can cut off complex foreign bodies.
Claims (10)
1. The utility model provides a filiform foreign matter cutting device of steam generator intertube which characterized in that: comprises a rotary motor (1), a transmission flexible shaft (2), a shell pressing plate (3), an endoscope (4), a cutting blade (7), a transmission channel (8) and a monitoring channel (9); the rotary motor (1) is arranged at the leftmost end of the metal wire-shaped foreign matter cutting device between the steam generator tubes and is connected with the shell pressing plate (3) on the right side through a transmission flexible shaft (2); two through holes are drilled in the shell pressing plate (3), and are respectively a transmission channel (8) and a monitoring channel (9); the endoscope (4) passes through the monitoring channel (9); the transmission flexible shaft (2) passes through the transmission channel (8); the outer side of the shell pressing plate (3) is provided with a cutting blade (7).
2. The steam generator intertube wire-like foreign matter cutting device according to claim 1, wherein: the device for cutting the metal wire-shaped foreign matters among the steam generator tubes is also provided with a worm (5) and a worm wheel (6).
3. A steam generator intertube wire-like foreign matter cutting device according to claim 2, wherein: the worm (5) penetrates through the transmission channel (8) and is connected with the transmission flexible shaft (2) in a welding mode.
4. A steam generator intertube wire-like foreign matter cutting device according to claim 3, wherein: the worm wheel (6) is a shaft with threads and is perpendicular to the worm (5).
5. The steam generator intertube wire-like foreign matter cutting device according to claim 4, wherein: the worm wheel (6) and the worm (5) are meshed through cylindrical threads, and the rotating direction is changed through the threads.
6. The steam generator intertube wire-like foreign matter cutting device according to claim 5, wherein: and two ends of the worm wheel (6) are respectively welded with a cutting blade (7).
7. The steam generator intertube wire-like foreign matter cutting device according to claim 6, wherein: the abrasive material of the cutting blade (7) is silicon carbide.
8. A steam generator intertube wire-like foreign matter cutting device according to claim 7, wherein: the endoscope (4) is angled towards the cutting blade (7).
9. A steam generator intertube wire-like foreign matter cutting device according to claim 8, wherein: the transmission flexible shaft (2) is made of spring steel.
10. A cutting method using the wire-shaped foreign matter cutting device between steam generator tubes according to claim 9, comprising the steps of:
step 1: conveying the wire-shaped foreign matter cutting device between the steam generator tubes to foreign matters in the steam generator;
step 2: conveying the endoscope (4) to a proper position where the cutting blade (7) can be observed through a monitoring channel (9);
step 2: the integral position of the wire-shaped foreign matter cutting device between the steam generator tubes is adjusted in real time through the endoscope (4), so that the cutting blade (7) is contacted with the foreign matter;
and 3, step 3: the rotating speed of the rotating motor (1) is adjusted according to the material and the size of the foreign matters; the rotating motor (1) is started to rotate when being electrified, so that the rotating torque required by cutting is provided;
and 4, step 4: the rotating motor (1) is connected with the transmission flexible shaft (2) to rotate;
and 5, step 5: the transmission flexible shaft (2) and the connected worm (5) rotate in the monitoring channel (9);
and 6, step 6: the worm wheel (6) is shifted to rotate by the worm (5) through gear engagement;
and 7, step 7: the worm wheel (6) is concentrically connected with the cutting blade (7), and the rotary cutting blade (7) cuts foreign matters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011007711.3A CN112121953A (en) | 2020-09-23 | 2020-09-23 | Device and method for cutting metal wire-shaped foreign matters among tubes of steam generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011007711.3A CN112121953A (en) | 2020-09-23 | 2020-09-23 | Device and method for cutting metal wire-shaped foreign matters among tubes of steam generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112121953A true CN112121953A (en) | 2020-12-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011007711.3A Pending CN112121953A (en) | 2020-09-23 | 2020-09-23 | Device and method for cutting metal wire-shaped foreign matters among tubes of steam generator |
Country Status (1)
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| CN (1) | CN112121953A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202589650U (en) * | 2012-04-19 | 2012-12-12 | 申屠丙花 | Multifunctional operation channel for prostate electroresection diagnosing and treating system |
| CN103670398A (en) * | 2013-11-21 | 2014-03-26 | 王庆军 | Cutting disc type heading machine cutting device |
| CN109556104A (en) * | 2018-12-21 | 2019-04-02 | 核动力运行研究所 | Strip foreign matter shearing device and its application method between a kind of steam generator |
| CN109806025A (en) * | 2018-12-26 | 2019-05-28 | 天津农学院 | A kind of equus Special visible inseminating syringe and its artificial insemination method |
| TWM586203U (en) * | 2019-08-15 | 2019-11-11 | 楊天霖 | Separate type flexible spindle rotary cutter device |
| CN210843422U (en) * | 2019-07-19 | 2020-06-26 | 郑州大学第五附属医院 | Cutter for polyp in cavity |
| CN211334076U (en) * | 2019-10-15 | 2020-08-25 | 山西一建集团有限公司 | Double-tube grooving machine |
| CN111590152A (en) * | 2020-05-29 | 2020-08-28 | 核动力运行研究所 | Electric spark tool head, cutting device and using method thereof |
-
2020
- 2020-09-23 CN CN202011007711.3A patent/CN112121953A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202589650U (en) * | 2012-04-19 | 2012-12-12 | 申屠丙花 | Multifunctional operation channel for prostate electroresection diagnosing and treating system |
| CN103670398A (en) * | 2013-11-21 | 2014-03-26 | 王庆军 | Cutting disc type heading machine cutting device |
| CN109556104A (en) * | 2018-12-21 | 2019-04-02 | 核动力运行研究所 | Strip foreign matter shearing device and its application method between a kind of steam generator |
| CN109806025A (en) * | 2018-12-26 | 2019-05-28 | 天津农学院 | A kind of equus Special visible inseminating syringe and its artificial insemination method |
| CN210843422U (en) * | 2019-07-19 | 2020-06-26 | 郑州大学第五附属医院 | Cutter for polyp in cavity |
| TWM586203U (en) * | 2019-08-15 | 2019-11-11 | 楊天霖 | Separate type flexible spindle rotary cutter device |
| CN211334076U (en) * | 2019-10-15 | 2020-08-25 | 山西一建集团有限公司 | Double-tube grooving machine |
| CN111590152A (en) * | 2020-05-29 | 2020-08-28 | 核动力运行研究所 | Electric spark tool head, cutting device and using method thereof |
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