CN207997055U - Nuclear power plant's primary Ioops nuclear grade valve stainless steel pipes argon arc welding argon gas protects gas cell device - Google Patents
Nuclear power plant's primary Ioops nuclear grade valve stainless steel pipes argon arc welding argon gas protects gas cell device Download PDFInfo
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- CN207997055U CN207997055U CN201721801860.0U CN201721801860U CN207997055U CN 207997055 U CN207997055 U CN 207997055U CN 201721801860 U CN201721801860 U CN 201721801860U CN 207997055 U CN207997055 U CN 207997055U
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- air bag
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Abstract
The purpose of this utility model is that nuclear power plant's primary Ioops nuclear grade valve stainless steel pipes argon arc welding argon gas protects gas cell device, the equipment to protect the molding effect of weld seam and the function of quality with argon arc welding backside oxide is prevented.The device is mainly made of heat resistant rubber air bag, tunger tube, steel pipe, nylon sheet, pressure gauge, clip etc., air bag 1 is temperature resistant rubber air bag, is opened there are one hole, 3 one end of tunger tube is inserted into hole, 1 hole diameter of air bag and the outer diameter of tunger tube 3 match, and are tightly fastened connected;The other end connection tracheal pressure table 6 of tunger tube 3;Air bag 1, tunger tube 3 are put into pipeline, and the air bag 1 after expansion is fitted closely with 8 inner wall of stainless steel pipes.Using the airbag apparatus, under high radiation environment, facilitate installation and taking-up, reduces personal radiation dose, low manufacture cost, and can secondary use;After onsite application, argon gas protecting effect is good, and weldquality reaches core level-one acceptance criteria.
Description
Technical field
The utility model is related to nuclear power plant's nuclear grade stainless steel valve pipe welding internal protection fields, and in particular to a seed nucleus
Power plant's primary Ioops nuclear grade valve stainless steel pipes argon arc welding argon gas protects gas cell device.
Background technology
The primary Ioops pressure boundary critical valves of the in-service power plant of presurized water reactor, due to being repaiied for many years to the repeatedly grinding of valve
Multiple, the built-up welding layer thickness of valve sealing face has had reached minimum thickness as defined in producer.It is such as continuing with, valve may be influenced
Service life, need under high dose rate environment to valve carry out integral replacing.Valve pipe material is stainless steel pipes, slope
Degree of lip-rounding formula is docking, using argon arc welding method, to prevent argon arc welding backside oxide, needs to establish argon gas room inside pipeline,
Protect the molding effect and quality of weld seam.
Currently, the stainless steel pipes welding internal protection in China is generally built by the way of nylon baffle or the water soluble paper
Argon gas room, but Shortcomings to be found, nylon baffle is such as used, installation is inconvenient, time-consuming longer, under the high radiation environment of primary Ioops,
Personal radiation dose significantly improves, and after the completion of welding job, is not easily taken out, and is easy to form foreign matter.Such as use the water soluble paper, a side
Face easily forms foreign matter, is on the other hand easy to influence primary Ioops water quality.To solve the above problems, devising primary Ioops valve pipe
It welds argon gas and protects room relevant apparatus.
Invention content
The technology of the utility model solves the problems, such as:
The purpose of the present invention is be directed to presurized water reactor primary Ioops critical valves pipeline stainless steel argon arc welding to need to establish argon gas guarantor
Room is protected, under high radioactivity environment and the requirement of anti-foreign matter, the modes such as existing nylon baffle and the water soluble paper are not suitable for work and want
It asks, it is proposed that a kind of protective device of air bag argon gas room devises relevant experimental rig.
The technical solution of the utility model is:
The argon gas room is mainly surveyed by heat resistant rubber air bag, gas tube, steel pipe, nylon sheet, pressure gauge, argon bottle, contact
The compositions such as Wen Yi, clip, and need to set up analogue body, consider the heat resisting temperature of the heat-resisting air bag of rubber and caused by temperature increases
The protecting effect of deflection and argon gas room.By test measurement, reasonable installation distance and air bag of the air bag apart from weld bond is selected to fill
Argon pressure size.
A kind of nuclear power plant's primary Ioops nuclear grade valve stainless steel pipes argon arc welding argon gas protection gas cell device, including:Rubber
Air bag, changeover portion stainless steel tube, gas tube, external screw thread steel pipe, valve deck mouth nylon cover board, pressure gauge, valve body, stainless steel pipes,
Air bag is temperature resistant rubber air bag, is opened there are one hole, gas tube one end is inserted into hole, the hole diameter and gas tube of air bag
Outer diameter match, be tightly fastened connected;The other end of gas tube connects tracheal pressure table;Air bag, gas tube are put into pipeline,
Air bag after expansion is fitted closely with stainless steel pipes inner wall.
There are three internal thread holes for processing on valve deck mouth nylon cover board, and internal thread hole size is consistent with external screw thread steel pipe, stainless
Steel external screw thread steel pipe and valve deck mouth nylon cover board are screwed connection, and inflated rubber pipe passes through stainless steel external screw thread steel from inside
Pipe, wherein two tracheaes are respectively pipeline both sides air bag applying argon gas, a tracheae is applying argon gas in argon gas room.Valve deck mouth nylon lid
It is T fonts to have annular projection, end face on plate, and the outer diameter of annular projection is matched with the internal diameter of valve body port, valve deck mouth nylon lid
Plate is fixedly connected with body cap mouth, and valve deck mouth nylon cover board, pipeline both sides air bag and stainless steel pipes establish closed argon gas jointly
Room.Changeover portion stainless steel tube both ends are connected by clip with inflated rubber pipe.
The utility model has the beneficial effect that compared with prior art:
(1) valve deck mouth nylon cover board is processed into circle, section at T fonts, can the effective and tight-lipped close fit of valve deck, with pipe
Road both sides air bag establishes closed argon gas room jointly;
(2) three internal thread holes are processed on nylon cover board, three threading steel pipes pass through three interior spiral shells of nylon cover board
Line mouth, wherein two steel pipes are to pass through pipeline both sides airbag inflation pipe, a steel pipe is passing through argon gas room tracheae;Pass through
Rotation threaded steel pipe can adjust the center that airbag inflation pipe is located at pipeline;
(3) air bag is inflated after being put into pipeline, keeps air bag close to insides of pipes.In the welding process, in conjunction with test data,
Certain pressure value is kept by pressure gauge;
(4) stainless steel changeover portion is located at weld bond position, determines that the length of stainless steel changeover portion, both sides are used by test data
Clip is connected with air bag air inlet pipe.Go deep into length by adjusting external screw thread steel pipe, it is ensured that air bag air inlet pipe is located at pipeline center
Position.
(5) airbag apparatus is used, under high radiation environment, facilitates installation and taking-up, reduces personal radiation dose, together
When, it is easy decontamination, it can secondary use;
(6) the device low manufacture cost, and can secondary use, have certain economic value;After onsite application, argon gas is protected
Shield works well, and weldquality reaches core level-one acceptance criteria.
Description of the drawings
Fig. 1 is that the utility model nuclear power plant primary Ioops nuclear grade valve stainless steel pipes argon arc welding argon gas protects gas cell device
Structure drawing of device.
Fig. 2 is that the utility model nuclear power plant primary Ioops nuclear grade valve stainless steel pipes argon arc welding argon gas protects gas cell device
Nylon covering plate structure figure.
Fig. 3 is that the utility model nuclear power plant primary Ioops nuclear grade valve stainless steel pipes argon arc welding argon gas protects gas cell device
Stainless steel transition section structure figure.
In figure:1. rubber pneumatic bag, 2. changeover portion stainless steel tubes, 3. gas tubes, 4. external screw thread steel pipes, 5. valve deck mouth nylon lids
Plate, 6. pressure gauges, 7. valve bodies, 8. stainless steel pipes.
Specific implementation mode
In the following with reference to the drawings and specific embodiments to the utility model nuclear power plant primary Ioops nuclear grade valve stainless steel pipes argon
Arc welding argon gas protection gas cell device is described in detail:
The basic thought of the present invention is by designing air bag and nylon cover board, a closed argon gas being established in insides of pipes
Room passes through 1:1 analogue body test data determines the blowing pressure of air bag and places distance, determines the gas stream of argon gas room gas
Amount.By simulating welded seam quality results, the implementation parameter at scene is determined.
The hot arc injection-tube check-valves two of one factory 320MW unit shutdown cooling systems of center nuclear power operational management Co., Ltd
Platform swing check valve is the critical valves of primary Ioops pressure boundary.Due to being repaiied for many years to the repeatedly grinding of this two deck valves door
Multiple, the built-up welding layer thickness of valve sealing face has had reached minimum thickness as defined in producer.It is such as continuing with, valve may be influenced
Service life.Therefore company has replaced two deck valve doors in planned outage, and valve and main pipe pipe material are stainless steel material,
Welding method is welded capping using argon arc bottoming.
The present invention is mainly made of following 3 parts:
(1) airbag apparatus
As shown in Figure 1, the air bag is temperature resistant rubber air bag, open that there are one holes on air bag 1,3 one end of gas tube is inserted into
In hole, the hole diameter and the outer diameter of gas tube 3 of air bag 1 match, and are tightly fastened connected.The other end of gas tube 3 connects
Tracheal pressure table 6.Air bag 1, gas tube 3 are put into pipeline, and by gas tube 3 into pipeline applying argon gas, the air bag 1 after expansion
It need to be fitted closely with 8 inner wall of stainless steel pipes, and pressure size is recorded by reading tracheal pressure table 6.1:On 1 analogue body
Pipeline butt is carried out, after having welded one layer, between contact type thermometric indicator, measures and becomes from weld bond to the temperature of two side ducts of weld bond
Change, while recording the pressure change of air bag 1, the blowing pressure of final choice suitable mounting distance and air bag 1.In view of existing
There may be gas leakage using 1 interface of air bag, therefore, are filled with the gas selection argon gas of air bag 1, i.e., with internal protection gas one
It causes.
(2) valve deck mouth nylon cover board
As shown in Fig. 2, there are three internal thread hole, internal thread hole size and external screw threads for processing on the valve deck mouth nylon cover board 5
Steel pipe 4 is consistent, and stainless steel external screw thread steel pipe 4 and valve deck mouth nylon cover board 5 are screwed connection, and inflated rubber pipe 3 is worn from inside
Stainless steel external screw thread steel pipe 4 is crossed, wherein two tracheaes are respectively pipeline both sides air bag applying argon gas, a tracheae is to be filled in argon gas room
Argon gas.It is T fonts to have annular projection, end face on valve deck mouth nylon cover board 5, and the outer diameter of annular projection is interior with 7 port of valve body
Diameter matches, and valve deck mouth nylon cover board 5 is fixedly connected with 7 lid mouth of valve body, valve deck mouth nylon cover board 5, pipeline both sides air bag 1 and not
Rust steel conduit 8 establishes closed argon gas room jointly.
(3) changeover portion stainless steel tube
As shown in figure 3,2 both ends of changeover portion stainless steel tube are connected by clip and inflated rubber pipe 3.In view of installation
Period airbag inflation pipe is susceptible to eccentric or even is welded close to weld bond if used tracheae due to its own gravity or installation deviation
There may be the scenes for blowing tracheae in termination process, therefore, after calculating practical air bag mounting distance, are used in weld bond region
One section stainless steel changeover portion.
Device process is as follows:Valve 7 is pumped into spool first, in advance by air bag 1, air bag air inlet pipe 3 and transition stainless steel
The connection of pipe 2 is completed;External screw thread steel pipe 4 is screwed in into valve deck mouth nylon cover board 5, and valve deck mouth nylon cover board 5 is buckled into the lid of valve body 7
At mouthful.Air bag 1 is put into, distance is determined according to the result of simulation test, and air bag air inlet pipe 3 is passed through into threaded steel pipe, and even
Pressure gauge 6 and argon bottle are connect, adjusts balloon positions in real time;To 1 applying argon gas of air bag, makes it close to insides of pipes, position is fixedly mounted
It sets;Valve 7 and pipeline point solid welding are determined, by adjusting the height of threaded steel pipe, determine that air bag air inlet pipe is in pipeline center position
It sets;Argon gas room tracheae 3 is passed to threaded steel pipe 4, and to applying argon gas in argon gas room, is started after argon content in gas chamber is up to standard
Argon arc backing weld connects, in welding process, according to experimental data and argon pressure table, it is ensured that air bag keeps certain pressure value;It waits for
After the completion of backing welding, airbag gas is bled off, removes nylon cover board 5, and air bag and accessory are taken out together, timely decontamination;It beats
Quality inspection is carried out to weld seam after the completion of bottom, starts follow-up electric welding field after qualified.
Hot arc injection-tube of the present apparatus in one factory 320MW unit shutdown cooling systems of center nuclear power operational management Co., Ltd
Two swing check valve valve pipes of check-valves are applied successfully in replacing.
Claims (4)
1. a kind of nuclear power plant's primary Ioops nuclear grade valve stainless steel pipes argon arc welding argon gas protects gas cell device, including:Rubber gas
Capsule (1), changeover portion stainless steel tube (2), gas tube (3), external screw thread steel pipe (4), valve deck mouth nylon cover board (5), pressure gauge (6),
Valve body (7), stainless steel pipes (8), it is characterised in that:Air bag (1) is temperature resistant rubber air bag, is opened there are one hole, gas tube (3)
One end is inserted into hole, and air bag (1) hole diameter and the outer diameter of gas tube (3) match, and are tightly fastened connected;Gas tube
(3) other end connection tracheal pressure table (6);Air bag (1), gas tube (3) are put into pipeline, the air bag (1) after expansion with not
Rust steel conduit (8) inner wall fits closely.
2. a kind of nuclear power plant's primary Ioops nuclear grade valve stainless steel pipes argon arc welding argon gas as described in claim 1 protects gas chamber
Device, it is characterised in that:Processing is there are three internal thread hole on the valve deck mouth nylon cover board (5), internal thread hole size with it is outer
Unanimously, stainless steel external screw thread steel pipe (4) and valve deck mouth nylon cover board (5) are screwed connection threaded steel pipe (4), inflated rubber pipe
(3) stainless steel external screw thread steel pipe (4) is passed through from inside, wherein two tracheaes are respectively pipeline both sides air bag applying argon gas, a gas
Pipe is applying argon gas in argon gas room.
3. a kind of nuclear power plant's primary Ioops nuclear grade valve stainless steel pipes argon arc welding argon gas as described in claim 1 protects gas chamber
Device, it is characterised in that:There is annular projection on the valve deck mouth nylon cover board (5), end face is T fonts, annular projection it is outer
Diameter is matched with the internal diameter of valve body (7) port, and valve deck mouth nylon cover board (5) is fixedly connected with valve body (7) lid mouth, valve deck mouth nylon lid
Plate (5), pipeline both sides air bag (1) and stainless steel pipes (8) establish closed argon gas room jointly.
4. a kind of nuclear power plant's primary Ioops nuclear grade valve stainless steel pipes argon arc welding argon gas as described in claim 1 protects gas chamber
Device, it is characterised in that:Changeover portion stainless steel tube (2) both ends are connected by clip and inflated rubber pipe (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721801860.0U CN207997055U (en) | 2017-12-21 | 2017-12-21 | Nuclear power plant's primary Ioops nuclear grade valve stainless steel pipes argon arc welding argon gas protects gas cell device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721801860.0U CN207997055U (en) | 2017-12-21 | 2017-12-21 | Nuclear power plant's primary Ioops nuclear grade valve stainless steel pipes argon arc welding argon gas protects gas cell device |
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| CN207997055U true CN207997055U (en) | 2018-10-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112496602A (en) * | 2020-11-12 | 2021-03-16 | 福建福清核电有限公司 | Air bag type welding argon filling protection method for nuclear power plant |
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2017
- 2017-12-21 CN CN201721801860.0U patent/CN207997055U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112496602A (en) * | 2020-11-12 | 2021-03-16 | 福建福清核电有限公司 | Air bag type welding argon filling protection method for nuclear power plant |
| CN112496602B (en) * | 2020-11-12 | 2022-09-16 | 福建福清核电有限公司 | Air bag type welding argon filling protection method for nuclear power plant |
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