CN111360000A - Ultrasonic vibration decontamination device and decontamination method for primary circuit sampling pipeline - Google Patents
Ultrasonic vibration decontamination device and decontamination method for primary circuit sampling pipeline Download PDFInfo
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- CN111360000A CN111360000A CN201911044310.2A CN201911044310A CN111360000A CN 111360000 A CN111360000 A CN 111360000A CN 201911044310 A CN201911044310 A CN 201911044310A CN 111360000 A CN111360000 A CN 111360000A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/02—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by distortion, beating, or vibration of the surface to be cleaned
- B08B7/026—Using sound waves
- B08B7/028—Using ultrasounds
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G7/00—Cleaning by vibration or pressure waves
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
Abstract
The invention belongs to the technical field of vibration decontamination of a primary circuit sampling pipeline of a nuclear power station, and particularly relates to an ultrasonic vibration decontamination device and a decontamination method of the primary circuit sampling pipeline, wherein the ultrasonic vibration decontamination device comprises the following steps: the power line, the ultrasonic generators, the control cabinet and the ultrasonic vibrators are arranged on the power line; each ultrasonic vibrator is connected with an independent ultrasonic generator through a power line and is powered and driven by the ultrasonic generator; the ultrasonic generator is fixedly arranged in the control cabinet through bolts; the ultrasonic vibrators are uniformly arranged on the sampling pipeline. The invention is suitable for the field of pipeline decontamination, and particularly aims at the conditions that pipelines are thin, flushing is ineffective and a decontamination device cannot be built in.
Description
Technical Field
The invention belongs to the technical field of vibration decontamination of a primary circuit sampling pipeline of a nuclear power station, and particularly relates to an ultrasonic vibration decontamination device and a decontamination method for the primary circuit sampling pipeline.
Background
The activity of fission products in a primary loop coolant of a nuclear power plant is an important parameter for reflecting whether a reactor core fuel element cladding is damaged, in order to monitor the total gamma volume activity of the primary loop coolant in real time, three SAS201 liquid activity monitors (KUL01CR001/002/003 instruments) are arranged on a KUL01 sampling pipeline of the primary loop, and the total gamma volume activity of the primary loop coolant is calculated by measuring total gamma radiation. Therefore, the measured value of the primary circuit pipeline liquid activity monitor is guaranteed to be truly usable, and the method is particularly important for monitoring the integrity of the primary circuit safety barrier.
The measured value of the liquid activity monitor can rise to different degrees during the startup and shutdown of the unit and the power change, and an alarm exceeding the first-level alarm threshold value is triggered to alarm when the measured value is serious (1.85E11Bq/m 3); after the power of the unit is stabilized, the measured value of the instrument begins to gradually decrease, and the measured value can be restored to the level before shutdown after about one month. When the measured value of the instrument rises or gives an alarm, no abnormality is found in chemical sampling analysis. When the surface contact dosage rate of the instrument sampling pipeline is measured, the dosage rate of the sampling pipeline is obviously increased and is seriously inconsistent with a chemical sampling result, and the measured value of a liquid activity monitor is seriously distorted and loses effectiveness. It is acknowledged that instrument measurements upsets or alarms are caused by radioactive material deposition within the measurement zone. However, in the prior art, for safety reasons, a separate flushing loop is not designed for the sampling pipeline of the loop KUL01, and when radioactive substance deposition occurs in the sampling pipeline, only the process water can be used for online flushing through the measurement loop of the boron meter. Because the inner diameter of the sampling pipeline is smaller, and the downstream is influenced by equipment such as a boron meter and the like (the loop is not smooth), the flushing effect is not obvious. After the power of the unit is increased due to the reasons, the difference between the measurement value of the liquid activity monitor and the chemical sampling analysis result is large, the total gamma volume activity of the primary loop coolant cannot be truly reflected, and the availability of the SAS201 type liquid activity monitor cannot meet the operation requirement.
Therefore, a complete set of ultrasonic vibration decontamination device for a primary circuit sampling pipeline of a nuclear power plant needs to be researched and designed aiming at the situations in the prior art, so that radioactive substances deposited on the primary circuit sampling pipeline of the nuclear power plant can be effectively removed, and the measured value of a radiation monitoring instrument is real and effective.
Disclosure of Invention
The invention aims to provide a primary circuit sampling pipeline ultrasonic vibration decontamination device and a decontamination method thereof aiming at the defects of the prior art, and aims to solve the technical problems that radioactive substances deposited on a primary circuit sampling pipeline of a nuclear power station in the prior art cannot be effectively removed, and the truth and the effectiveness of the measured value of a radiation monitoring instrument are influenced.
The technical scheme of the invention is as follows:
a return circuit sample line ultrasonic vibration decontamination plant includes: the ultrasonic generator comprises a power line 1, a plurality of ultrasonic generators 16, a control cabinet 8 and a plurality of ultrasonic vibrators 25; each ultrasonic vibrator 25 is connected with an independent ultrasonic generator 16 through a power line 1 and is powered and driven by the ultrasonic generator 16; the ultrasonic generator 16 is fixedly arranged in the control cabinet 8 through bolts; the ultrasonic vibrators 25 are uniformly arranged on the sampling pipeline.
The ultrasonic vibrator 25 further includes: the temperature sensor comprises a temperature sensor signal wire 2, a waterproof joint 3, a vibrator upper cover 4, a temperature sensor 5, a vibrator packaging shell 6 and an energy converter 7; the upper part of the vibrator packaging shell 6 is provided with a vibrator upper cover 4, the upper part of the vibrator upper cover 4 is provided with a waterproof joint 3, a temperature sensor 5 is arranged inside the vibrator packaging shell 6, and the temperature sensor 5 is in a drop shape and is fixed in a bolt hole at the top end inside the vibrator packaging shell 6 through heat-conducting silica gel; the lower part of the vibrator packaging shell 6 is provided with a transducer 7, and the transducer 7 is used for attaching the ultrasonic vibrator 25 to a sampling pipeline; one end of the temperature sensor signal wire 2 is connected with the temperature sensor 5 and arranged inside the oscillator packaging shell 6, the other end of the temperature sensor signal wire 2 penetrates out of the waterproof connector 3 and is connected into the ultrasonic system intelligent control cabinet 8, and the measurement range of the temperature sensor 5 is 0-100 ℃.
The oscillator parameters of the ultrasonic oscillator 25 are as follows: 40Khz, rated power 20w, transducer 7 and sample pipeline direct laminating installation are glued through epoxy resin super glue with ultrasonic vibrator 25, avoid the sample pipeline solder joint 26 on the sample pipeline during the installation of pasting.
The inside of the control cabinet 8 includes: the control cabinet CPU9, the analog input module 10, the signal converter 11, the intermediate relay 12, the 24V switching power supply 13, the single-phase two-pole circuit breaker 14, the single-pole circuit breaker 15, the wiring terminal strip 17, the vertical wire slot 18, the transverse wire slot 19, the guide rail 20, the single-phase two-pole circuit breaker 14 arranged in the control cabinet 8 and the single-pole circuit breaker 15 are used for ensuring that the normal operation of other equipment is not influenced when the ultrasonic decontamination device operates; the control circuit CPU9 is arranged at the upper end inside the control cabinet 8 and is used as a control center of the control cabinet; the intermediate relay 12 is connected into the power supply circuit of the ultrasonic generator 16, and the control circuit CPU9 controls the ultrasonic generator 16 to start and stop by closing the intermediate relay 12, so as to control the ultrasonic vibrator 25 to work; the signal converter 11 is connected with the temperature sensor 5 in the ultrasonic vibrator 25, and the temperature signal of the temperature sensor 5 is converted into 4-20mA current through the signal converter 11 and output; the related cables inside the control cabinet 8 are regularly arranged through the vertical wire grooves 18, the transverse wire grooves 19, the guide rails 20 and the terminal strip 17.
The outside of the control cabinet 8 is provided with: a touch screen 21, a power-on indicator lamp 22, an emergency stop button 23 and a power-on rotary switch 24; the power-on indicator lamp 22, the emergency stop button 23 and the power-on rotary switch 24 are arranged on the outer cabinet body of the control cabinet 8 side by side; when the power-on rotary switch 24 is rotated, the power-on indicator lamp 22 is turned on, and the touch screen 21 arranged on the control cabinet 8 is turned on, so that the operation of the whole ultrasonic decontamination device can be controlled through the touch screen 21.
The number of the ultrasonic generators 16 and the number of the ultrasonic vibrators 25 are 14, and the ultrasonic generators and the ultrasonic vibrators are powered by a 220V power supply.
The decontamination method of any one of the primary circuit sampling pipeline ultrasonic vibration decontamination devices comprises the following steps: the ultrasonic decontamination device has two modes of manual control and automatic control, and the two modes can be switched by a touch screen 21 on the control cabinet 8;
the method comprises the following steps: in the case of manual mode control, a worker can manually control each ultrasonic vibrator 25 through the control cabinet 8 to perform decontamination;
step two: in the case of automatic mode control, the ultrasonic vibrator 25 operates intermittently, wherein the vibration time is initially set to 3 minutes and the time interval is 15 minutes, and is adjusted by the control cabinet 8 according to the field working conditions; the start-stop, vibration time and vibration interval of each ultrasonic vibrator 25 are individually set through the control cabinet 8, and 14 ultrasonic vibrators 25 independently operate without mutual interference;
because the ultrasonic vibrator 25 can generate certain heat when working, the ultrasonic decontamination device only needs to set working time and interval in an automatic mode, and the temperature of the ultrasonic vibrator 25 can be automatically controlled within a reasonable range; in order to improve the operation stability of the ultrasonic decontamination device, an ultrasonic vibrator temperature monitoring system is added in the ultrasonic decontamination device, and the ultrasonic vibrator temperature monitoring system comprises a temperature sensor 5 and a signal converter 11;
step three: under the condition of automatic mode control, the ultrasonic vibrator 25 works and will have relative displacement with the temperature sensor 5, the temperature sensor 5 transmits a current signal to a CPU control unit in the control cabinet 8 through the analog input module 10 through the signal converter 11, the current signal linearly changes along with the temperature increase of the ultrasonic vibrator 25, when the temperature of the ultrasonic vibrator 25 is higher than a set value of 60 ℃, the CPU control unit can immediately cut off the 24V switching power supply 13, the ultrasonic vibrator 25 stops working, when the temperature of the ultrasonic vibrator 25 is recovered to a normal temperature, the ultrasonic vibrator can continue to work, and the normal temperature can be set according to the room temperature on site.
The invention has the following beneficial effects:
(1) according to the ultrasonic vibration decontamination device for the primary circuit sampling pipeline, the ultrasonic vibrator customized according to the pipeline is added to the primary circuit sampling pipeline, so that the ultrasonic vibrator can be tightly attached to the pipeline, radioactive substances attached to the primary circuit sampling pipeline are effectively removed, and the radiation background level of the primary circuit sampling pipeline is reduced.
(2) The ultrasonic vibration decontamination device for the primary loop sampling pipeline, which is designed by the invention, ensures that a radiation monitoring instrument is real and effective in a measured value of the primary loop sampling pipeline, and ensures the integrity of a primary loop radiation monitoring barrier of a nuclear power station.
(3) The invention ensures the integrity of the loop process pipeline and meets the special requirements of the nuclear power station on the monitoring and control of radioactive substances on the premise of not changing the structure of the loop sampling pipeline of the nuclear power station and not influencing the medium in the pipeline; the decontamination device designed by the invention can be scientifically distributed according to the shape of a pipeline, has an obvious decontamination effect, a simple structure, simple and convenient local installation, small occupied area, a good decontamination effect, low energy consumption and small influence on surrounding equipment, and can monitor the running condition of the oscillator in real time by additionally arranging the temperature sensor on the ultrasonic oscillator, ensure the stable running of the equipment and meet the special requirements of radioactive rooms of nuclear power stations.
(4) The ultrasonic vibration decontamination device for the primary circuit sampling pipeline, which is designed by the invention, integrates the ultrasonic controller in the control cabinet, realizes the overall control of the ultrasonic vibrator, has simple structure principle and simple and convenient personnel operation, ensures that the vibrators operate independently and do not interfere with each other.
(5) The ultrasonic vibration decontamination device and the decontamination method for the primary loop sampling pipeline, which are designed by the invention, realize effective decontamination practice of the primary loop sampling pipeline in the first-stage project of a certain nuclear power station, and have high popularization value in other nuclear power stations.
Drawings
FIG. 1 is a schematic structural diagram of an ultrasonic vibrator of an ultrasonic vibration decontamination device for a loop sampling pipeline designed by the invention;
FIG. 2 is a schematic structural diagram of a control cabinet of a primary circuit sampling pipeline ultrasonic vibration decontamination device designed by the invention;
FIG. 3 is a schematic view of the cabinet door layout of a control cabinet of a primary loop sampling pipeline ultrasonic vibration decontamination device designed by the present invention;
fig. 4 is a schematic view of the installation of the ultrasonic vibrator of the ultrasonic vibration decontamination device for the primary circuit sampling pipeline designed by the invention.
The system comprises a power line 1, a temperature sensor signal line 2, a waterproof joint 3, a vibrator upper cover 4, a temperature sensor 5, a vibrator packaging shell 6, a transducer 7, a control cabinet 8, a CPU9, an analog input module 10, a signal converter 11, an intermediate relay 12, a 24V switching power supply 13, a single-phase diode circuit breaker 14, a single-pole circuit breaker 15, an ultrasonic generator 16, a wiring terminal row 17, a vertical wire groove 18, a horizontal wire groove 19, a guide rail 20, a touch screen 21, an electrifying indicator lamp 22, an emergency stop button 23, an electrifying rotary switch 24, an ultrasonic vibrator 25 and a pipeline welding spot 26.
Detailed Description
The present technology is further described below:
a return circuit sample line ultrasonic vibration decontamination plant includes: the ultrasonic generator comprises a power line 1, a plurality of ultrasonic generators 16, a control cabinet 8 and a plurality of ultrasonic vibrators 25; each ultrasonic vibrator 25 is connected with an independent ultrasonic generator 16 through a power line 1 and is powered and driven by the ultrasonic generator 16; the ultrasonic generator 16 is fixedly arranged in the control cabinet 8 through bolts; the ultrasonic vibrators 25 are uniformly arranged on the sampling pipeline.
The ultrasonic vibrator 25 further includes: the temperature sensor comprises a temperature sensor signal wire 2, a waterproof joint 3, a vibrator upper cover 4, a temperature sensor 5, a vibrator packaging shell 6 and an energy converter 7; the upper part of the vibrator packaging shell 6 is provided with a vibrator upper cover 4, the upper part of the vibrator upper cover 4 is provided with a waterproof joint 3, a temperature sensor 5 is arranged inside the vibrator packaging shell 6, and the temperature sensor 5 is in a drop shape and is fixed in a bolt hole at the top end inside the vibrator packaging shell 6 through heat-conducting silica gel; the lower part of the vibrator packaging shell 6 is provided with a transducer 7, and the transducer 7 is used for attaching the ultrasonic vibrator 25 to a sampling pipeline; one end of the temperature sensor signal wire 2 is connected with the temperature sensor 5 and arranged inside the oscillator packaging shell 6, the other end of the temperature sensor signal wire 2 penetrates out of the waterproof connector 3 and is connected into the ultrasonic system intelligent control cabinet 8, and the measurement range of the temperature sensor 5 is 0-100 ℃.
The oscillator parameters of the ultrasonic oscillator 25 are as follows: 40Khz, rated power 20w, transducer 7 and sample pipeline direct laminating installation are glued through epoxy resin super glue with ultrasonic vibrator 25, avoid the sample pipeline solder joint 26 on the sample pipeline during the installation of pasting.
The inside of the control cabinet 8 includes: the control cabinet CPU9, the analog input module 10, the signal converter 11, the intermediate relay 12, the 24V switching power supply 13, the single-phase two-pole circuit breaker 14, the single-pole circuit breaker 15, the wiring terminal strip 17, the vertical wire slot 18, the transverse wire slot 19, the guide rail 20, the single-phase two-pole circuit breaker 14 arranged in the control cabinet 8 and the single-pole circuit breaker 15 are used for ensuring that the normal operation of other equipment is not influenced when the ultrasonic decontamination device operates; the control circuit CPU9 is arranged at the upper end inside the control cabinet 8 and is used as a control center of the control cabinet; the intermediate relay 12 is connected into the power supply circuit of the ultrasonic generator 16, and the control circuit CPU9 controls the ultrasonic generator 16 to start and stop by closing the intermediate relay 12, so as to control the ultrasonic vibrator 25 to work; the signal converter 11 is connected with the temperature sensor 5 in the ultrasonic vibrator 25, and the temperature signal of the temperature sensor 5 is converted into 4-20mA current through the signal converter 11 and output; the related cables inside the control cabinet 8 are regularly arranged through the vertical wire grooves 18, the transverse wire grooves 19, the guide rails 20 and the terminal strip 17.
The outside of the control cabinet 8 is provided with: a touch screen 21, a power-on indicator lamp 22, an emergency stop button 23 and a power-on rotary switch 24; the power-on indicator lamp 22, the emergency stop button 23 and the power-on rotary switch 24 are arranged on the outer cabinet body of the control cabinet 8 side by side; when the power-on rotary switch 24 is rotated, the power-on indicator lamp 22 is turned on, and the touch screen 21 arranged on the control cabinet 8 is turned on, so that the operation of the whole ultrasonic decontamination device can be controlled through the touch screen 21.
The number of the ultrasonic generators 16 and the number of the ultrasonic vibrators 25 are 14, and the ultrasonic generators and the ultrasonic vibrators are powered by a 220V power supply.
The decontamination method of any one of the primary circuit sampling pipeline ultrasonic vibration decontamination devices comprises the following steps: the ultrasonic decontamination device has two modes of manual control and automatic control, and the two modes can be switched by a touch screen 21 on the control cabinet 8;
the method comprises the following steps: in the case of manual mode control, a worker can manually control each ultrasonic vibrator 25 through the control cabinet 8 to perform decontamination;
step two: in the case of automatic mode control, the ultrasonic vibrator 25 operates intermittently, wherein the vibration time is initially set to 3 minutes and the time interval is 15 minutes, and is adjusted by the control cabinet 8 according to the field working conditions; the start-stop, vibration time and vibration interval of each ultrasonic vibrator 25 are individually set through the control cabinet 8, and 14 ultrasonic vibrators 25 independently operate without mutual interference;
because the ultrasonic vibrator 25 can generate certain heat when working, the ultrasonic decontamination device only needs to set working time and interval in an automatic mode, and the temperature of the ultrasonic vibrator 25 can be automatically controlled within a reasonable range; in order to improve the operation stability of the ultrasonic decontamination device, an ultrasonic vibrator temperature monitoring system is added in the ultrasonic decontamination device, and the ultrasonic vibrator temperature monitoring system comprises a temperature sensor 5 and a signal converter 11;
step three: under the condition of automatic mode control, the ultrasonic vibrator 25 works and will have relative displacement with the temperature sensor 5, the temperature sensor 5 transmits a current signal to a CPU control unit in the control cabinet 8 through the analog input module 10 through the signal converter 11, the current signal linearly changes along with the temperature increase of the ultrasonic vibrator 25, when the temperature of the ultrasonic vibrator 25 is higher than a set value of 60 ℃, the CPU control unit can immediately cut off the 24V switching power supply 13, the ultrasonic vibrator 25 stops working, when the temperature of the ultrasonic vibrator 25 is recovered to a normal temperature, the ultrasonic vibrator can continue to work, and the normal temperature can be set according to the room temperature on site.
Example (b):
as shown in fig. 1 to 4, the ultrasonic vibration decontamination device for the primary circuit sampling pipeline, which is designed by the invention, comprises an ultrasonic generator 16, a control cabinet 8, an ultrasonic vibrator 25 and an ultrasonic vibrator temperature monitoring system, wherein the ultrasonic vibrator 25 is directly connected with the ultrasonic generator 16 through a power line 1 and is powered and driven by the ultrasonic generator 16, and the control cabinet 8 controls the operation of the ultrasonic vibrator 25 by controlling the start and stop of the ultrasonic generator 16.
The design has 14 ultrasonic vibrators 25, and the vibrator parameters are as follows: 40Khz, 20w rated, is installed avoiding the pipeline welds 26, as shown in fig. 4. In order to improve the descaling efficiency and reduce the interference among the ultrasonic vibrators 25, each ultrasonic vibrator 25 is driven by the power supply of a separate ultrasonic generator 16, and 14 ultrasonic generators 16 are provided in total, are powered by a 220V power supply and are fixedly arranged in the control cabinet 8 through bolts. The whole ultrasonic decontamination device is powered by a 220V power supply, and a single-phase two-pole breaker 14, a single-pole breaker 15 and an emergency stop button 23 are arranged in the control cabinet 8, so that the normal operation of other equipment is not influenced when the ultrasonic decontamination device operates. The control circuit CPU9 adopts PLC as control center of the control cabinet, the intermediate relay 12 is connected to the power supply circuit of the ultrasonic generator 16, the PLC controls the start and stop of the ultrasonic generator 16 by closing the intermediate relay 12, thereby controlling the work of the ultrasonic vibrator 25. When the staff need start decontamination plant, only need insert the key, rotatory power-on rotary switch 24, power-on pilot lamp 22 is bright, opens the 10 cun touch-sensitive screens 21 of installation on the switch board 8, can pass through the operation of the whole ultrasonic decontamination plant of touch-sensitive screen 21 control, easy operation.
This design ultrasonic vibrator 25 front end installation face adopts cambered surface and sandblast to handle, adopts epoxy resin super glue as adhesion glue, makes transducer 7 and the direct laminating installation of sampling pipeline, can reduce ultrasonic energy loss on the one hand, and the heat that transducer 7 produced can directly transmit to sampling pipeline on the one hand, improves ultrasonic vibrator 25's radiating efficiency. During installation, a layer of copper wire mesh is additionally arranged on the contact surface of the sampling pipeline and the transducer 7, so that the contact area of the transducer 7 and the sampling pipeline is increased, the ultrasonic vibrator 25 is tightly attached to the sampling pipeline, the firmness degree of the ultrasonic vibrator 25 is increased, and the conduction efficiency and the descaling efficiency of ultrasonic waves are improved.
The ultrasonic decontamination device has two modes of manual control and automatic control, and the two modes can be switched through a touch screen 21 on the control cabinet 8. In the manual mode, the worker can manually control the operation of the whole decontamination device through the control cabinet 8, wherein each ultrasonic vibrator 25 can be manually controlled independently. The ultrasonic vibrator 25 in the automatic control mode adopts an intermittent working mode in which the vibration time is preliminarily set to 3 minutes, the time interval is 15 minutes, and the adjustment can be performed through the control cabinet 8 according to the field working condition. The start and stop, the vibration time and the vibration interval of each ultrasonic vibrator 25 can be independently set through the control cabinet 8, and 14 ultrasonic vibrators 25 independently operate without mutual interference.
In addition, the ultrasonic vibrator 25 generates a certain amount of heat during operation, and the temperature of the ultrasonic vibrator 25 rises, so that the ultrasonic vibrator 25 is irreversibly damaged by a high temperature for a long time. The temperature of the ultrasonic vibrator 25 can be controlled within a reasonable range as long as the working time and the working interval are set in the automatic mode of the ultrasonic decontamination device. However, in order to prevent misoperation of workers or sudden failure of equipment, the decontamination device is continuously operated for a long time, so that the ultrasonic vibrator 25 is damaged due to overhigh temperature. In order to improve the operation stability of the ultrasonic decontamination device, an ultrasonic vibrator temperature monitoring system is added in the ultrasonic decontamination device, and an ultrasonic vibrator 25 control system mainly comprises a PT100 temperature sensor 5 and a signal converter 11. Because ultrasonic vibrator 25 during operation high frequency vibration, if the side at ultrasonic vibrator 25 is installed in the laminating of temperature sensor 5, ultrasonic vibrator 25 during operation will have relative displacement with temperature sensor 5 to it is not accurate to lead to temperature sensor 5 frictional heating to lead to measuring the temperature, so make temperature sensor 5 into the drop form, utilize heat conduction silica gel to fix in the bolt hole at ultrasonic vibrator 25 top, frictional heating can be eliminated on the one hand, on the other hand can utilize soft heat conduction silica gel buffering to reduce temperature sensor 5's vibration. The measuring range of the temperature sensor 5 is 0-100 ℃, the temperature signal of the temperature sensor 5 is converted into 4-20mA current through the signal converter 11 to be output, the current signal is transmitted to the CPU9 control unit in the control cabinet 8 through the analog input module 10, the current signal linearly changes along with the temperature increase of the ultrasonic vibrator 25, when the temperature of the ultrasonic vibrator 25 is higher than a set value of 60 ℃, the PLC control unit can immediately cut off the 24V switching power supply 13, the ultrasonic vibrator 25 stops working, and when the temperature of the ultrasonic vibrator 25 is recovered to a normal temperature (the temperature is set according to the room temperature on site), the work can be continued. The temperature sensor signal wire 2 and the ultrasonic vibrator 25 are led out together by a waterproof joint 3 at the top of the vibrator packaging shell 6 and are connected into an intelligent control cabinet 8 of the ultrasonic system. Related cables in the control cabinet 8 are arranged in a standard mode through the vertical wire grooves 18, the transverse wire grooves 19, the guide rails 20 and the wiring terminal strip 17, and searching is facilitated.
The ultrasonic vibration decontamination method is suitable for the field of pipeline decontamination, particularly aims at the conditions that pipelines are thin, flushing is ineffective and a decontamination device cannot be arranged in the pipelines, can well achieve the purpose of decontamination by using ultrasonic vibration decontamination, and is a mature, convenient and effective solution. The method can be widely applied to nuclear power station extension units, other power plants and related industrial fields.
The present invention has been described in detail with reference to the embodiments, but the present invention is not limited to the embodiments, and various changes can be made without departing from the gist of the present invention within the knowledge of those skilled in the art. The prior art can be adopted in the content which is not described in detail in the invention.
Claims (7)
1. A return circuit sample pipeline ultrasonic vibration decontamination plant, its characterized in that includes:
the ultrasonic generator comprises a power line (1), a plurality of ultrasonic generators (16), a control cabinet (8) and a plurality of ultrasonic vibrators (25); each ultrasonic vibrator (25) is connected with an independent ultrasonic generator (16) through a power line (1) and is powered and driven by the ultrasonic generator (16); the ultrasonic generator (16) is fixedly arranged in the control cabinet (8) through bolts; the ultrasonic vibrators (25) are uniformly arranged on the sampling pipeline.
2. A primary sampling line ultrasonic vibration decontamination device as defined in claim 1, wherein said ultrasonic vibrator (25) further comprises: the temperature sensor comprises a temperature sensor signal wire (2), a waterproof joint (3), a vibrator upper cover (4), a temperature sensor (5), a vibrator packaging shell (6) and an energy converter (7); the upper part of the vibrator packaging shell (6) is provided with a vibrator upper cover (4), the upper part of the vibrator upper cover (4) is provided with a waterproof joint (3), a temperature sensor (5) is arranged inside the vibrator packaging shell (6), and the temperature sensor (5) is in a water-drop shape and is fixed in a bolt hole at the top end inside the vibrator packaging shell (6) through heat-conducting silica gel; the lower part of the vibrator packaging shell (6) is provided with an energy converter (7), and the energy converter (7) is used for attaching the ultrasonic vibrator (25) to the sampling pipeline; one end of the temperature sensor signal line (2) is connected with the temperature sensor (5) and arranged inside the vibrator packaging shell (6), the other end of the temperature sensor signal line (2) penetrates out of the waterproof connector (3) to be connected into the ultrasonic system intelligent control cabinet (8), and the measurement range of the temperature sensor (5) is 0-100 ℃.
3. A primary sampling line ultrasonic vibration decontamination device as defined in claim 2, wherein: the oscillator parameters of the ultrasonic oscillator (25) are as follows: 40Khz, rated power 20w, ultrasonic vibrator (25) are through epoxy resin super glue with transducer (7) and the direct laminating installation of sampling pipeline, avoid sampling pipeline solder joint (26) on the sampling pipeline during pasting the installation.
4. A primary sampling line ultrasonic vibration decontamination device as defined in claim 3, wherein: the control cabinet (8) comprises: the ultrasonic decontamination device comprises a control cabinet CPU (9), an analog input module (10), a signal converter (11), an intermediate relay (12), a 24V switching power supply (13), a single-phase two-pole circuit breaker (14), a single-pole circuit breaker (15), a wiring terminal row (17), a vertical line slot (18), a transverse line slot (19), a guide rail (20), the single-phase two-pole circuit breaker (14) arranged in the control cabinet (8), and the single-pole circuit breaker (15) which are used for ensuring that the normal operation of other equipment is not influenced when the ultrasonic decontamination device operates; the control circuit CPU (9) is arranged at the upper end inside the control cabinet (8) and is used as a control center of the control cabinet; an intermediate relay (12) is connected into a power supply circuit of the ultrasonic generator (16), and a control circuit CPU (9) controls the ultrasonic generator (16) to start and stop by closing the intermediate relay (12), so that the ultrasonic vibrator (25) is controlled to work; the signal converter (11) is connected with the temperature sensor (5) in the ultrasonic vibrator (25), and the temperature signal of the temperature sensor (5) is converted into 4-20mA current through the signal converter (11) to be output; related cables inside the control cabinet (8) are arranged in a standard mode through the vertical line grooves (18), the transverse line grooves (19), the guide rails (20) and the wiring terminal strip (17).
5. A primary sampling line ultrasonic vibration decontamination device as defined in claim 4, wherein: the outside of the control cabinet (8) is provided with: the emergency stop device comprises a touch screen (21), a power-on indicator lamp (22), an emergency stop button (23) and a power-on rotary switch (24); the power-on indicator lamp (22), the emergency stop button (23) and the power-on rotary switch (24) are arranged on the outer cabinet body of the control cabinet (8) side by side; when the power-on rotary switch (24) is rotated, the power-on indicator lamp (22) is turned on, and the touch screen (21) arranged on the control cabinet (8) is turned on, so that the operation of the whole ultrasonic decontamination device can be controlled through the touch screen (21).
6. A primary sampling line ultrasonic vibration decontamination device as defined in claim 5, wherein: the number of the ultrasonic generators (16) and the number of the ultrasonic vibrators (25) are 14, and the ultrasonic generators and the ultrasonic vibrators are powered by a 220V power supply.
7. A method for decontaminating a primary sampling line ultrasonic vibration decontamination apparatus as claimed in any one of claims 1 to 6, comprising the steps of: the ultrasonic decontamination device has two modes of manual control and automatic control, and the two modes can be switched by a touch screen (21) on a control cabinet (8);
the method comprises the following steps: when the manual mode is used for controlling the condition, a worker can manually control each ultrasonic vibrator (25) through the control cabinet (8) to decontaminate;
step two: in the case of automatic mode control, the ultrasonic vibrator (25) adopts an intermittent working mode, wherein the vibration time is preliminarily set to 3 minutes, the time interval is 15 minutes, and the ultrasonic vibrator is adjusted through a control cabinet (8) according to the field working condition; the starting and stopping, the vibration time and the vibration interval of each ultrasonic vibrator (25) are set independently through the control cabinet (8), and 14 ultrasonic vibrators (25) operate independently and do not interfere with each other;
because the ultrasonic vibrator (25) can generate certain heat when working, the ultrasonic decontamination device only needs to set working time and interval in an automatic mode, and the temperature of the ultrasonic vibrator (25) can be automatically controlled within a reasonable range; in order to improve the operation stability of the ultrasonic decontamination device, an ultrasonic vibrator temperature monitoring system is added in the ultrasonic decontamination device, and the ultrasonic vibrator temperature monitoring system comprises a temperature sensor (5) and a signal converter (11);
step three: when the automatic mode control is carried out, the ultrasonic vibrator (25) and the temperature sensor (5) can have relative displacement when working, the temperature sensor (5) transmits a current signal to a CPU (Central processing Unit) control unit in the control cabinet (8) through the analog input module (10) through the signal converter (11), the current signal linearly changes along with the temperature increase of the ultrasonic vibrator (25), when the temperature of the ultrasonic vibrator (25) is higher than a set value of 60 ℃, the CPU control unit can immediately cut off the 24V switching power supply (13), the ultrasonic vibrator (25) stops working, when the temperature of the ultrasonic vibrator (25) is recovered to a normal temperature, the ultrasonic vibrator can continue working, and the normal temperature can be set according to the room temperature on site.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911044310.2A CN111360000A (en) | 2019-10-30 | 2019-10-30 | Ultrasonic vibration decontamination device and decontamination method for primary circuit sampling pipeline |
| RU2020122510U RU199869U1 (en) | 2019-10-30 | 2020-07-07 | Ultrasonic vibration decontamination device on the primary circuit sampling line of the NPP |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911044310.2A CN111360000A (en) | 2019-10-30 | 2019-10-30 | Ultrasonic vibration decontamination device and decontamination method for primary circuit sampling pipeline |
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| Publication Number | Publication Date |
|---|---|
| CN111360000A true CN111360000A (en) | 2020-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911044310.2A Pending CN111360000A (en) | 2019-10-30 | 2019-10-30 | Ultrasonic vibration decontamination device and decontamination method for primary circuit sampling pipeline |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111360000A (en) |
| RU (1) | RU199869U1 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2419388C2 (en) * | 2006-01-31 | 2011-05-27 | Панасоник Корпорэйшн | Ultrasonic probe |
| JP4345818B2 (en) * | 2007-01-15 | 2009-10-14 | パナソニック電工株式会社 | Ultrasonic generator and skin care device using the same |
| KR101133848B1 (en) * | 2012-01-09 | 2012-04-06 | 남기원 | Apparatus for removing scale and slime |
-
2019
- 2019-10-30 CN CN201911044310.2A patent/CN111360000A/en active Pending
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| RU199869U1 (en) | 2020-09-23 |
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