CN207316330U - A kind of new tube socket replaced suitable for PWR nuclear power plant maintenance - Google Patents
A kind of new tube socket replaced suitable for PWR nuclear power plant maintenance Download PDFInfo
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- CN207316330U CN207316330U CN201721332196.XU CN201721332196U CN207316330U CN 207316330 U CN207316330 U CN 207316330U CN 201721332196 U CN201721332196 U CN 201721332196U CN 207316330 U CN207316330 U CN 207316330U
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Abstract
The utility model discloses a kind of new tube socket replaced suitable for PWR nuclear power plant maintenance, including cylinder, the cylinder includes upper linker and lower part connecting pin, the upper linker is provided with first through hole along axis, the lower end of the cylinder is provided with welding groove, the lower part connecting pin is provided with the second through hole along axis, and the size of through hole of second through hole with being opened up in main pipe is consistent, and the welding groove is V-type.Tube socket where poor weld is replaced using the new tube socket, it is again prefabricated without being carried out to tube socket lower part main pipe, it can be saved personnel's maintenance time while nuke rubbish is reduced, irradiation dose suffered by reduction personnel, improve the security and economy of nuclear power plant.
Description
Technical field
It the utility model is related to the tube design technical field of PWR nuclear power plant primary Ioops pressure boundary, and in particular to one
Kind is suitable for the new tube socket that PWR nuclear power plant maintenance is replaced.
Background technology
PWR nuclear power plant primary Ioops pressure boundary as contain cooling reactor core needed for reactor coolant, prevent from radiating
The second barrier of property substance release, is connected and composed by the pipeline of plurality of specifications, pipe fitting, valve and main equipment.In different size
Pipeline junction, according to the situation of change of different tube diameters, can choose Standard fittings connection is then typically designed to standard pipe
The type of attachment of part, the concentric reducer of specification, reducer tee etc. as listed by standard；The connector that can not be made choice by standard
Then need to be designed as nonstandard pipe fitting.Nonstandard pipe fitting for two kinds of different dimensions pipeline connections is usually using figure below (Fig. 1) institute
The stub (tube) shown.The stub (tube) lower part is connected with main pipe, and top is connected with tubule, is provided with perforate, and lower part is solid cylinder, bottom
Portion is the solid cylinder that outside diameter is Φ D, is highly 4~6mm.The connection of stub (tube) and lower part main pipe, which uses, to be welded to connect, in pipe
Road precast plant or nuclear power scene are constructed according to the specific arrangement positioning of pipeline.One and stub (tube) lower part are first opened on main pipe road
The hole that Φ D match, then will take over seat and be welded to connect with main pipe, after the completion of pass through the hole Φ C docking on stub (tube) top again
Tube socket lower part and its connected pipeline carry out reaming, stub (tube) is penetrated through with lower part main pipe, are formed and meet that the branch pipe of technological requirement connects
Connect.
Existing stub (tube) needs to carry out tap operation to the solid cylinder of lower part when replacing, and needs to carry out main pipe
Again prefabricated (perforate), causes inconvenient maintenance.
Utility model content
The purpose of this utility model is to provide a kind of new tube socket replaced suitable for PWR nuclear power plant maintenance, solve
The problem of existing stub (tube) causes inconvenient maintenance.
The utility model is achieved through the following technical solutions：
A kind of new tube socket replaced suitable for PWR nuclear power plant maintenance, including cylinder, the cylinder connect including top
End and lower part connecting pin are connect, the upper linker is provided with first through hole along axis, and the lower end of the cylinder is provided with welding
Groove, the lower part connecting pin are provided with the second through hole, second through hole and the size of the through hole opened up in main pipe along axis
Unanimously, the welding groove is V-type.
Then cylinder is inserted into perforate and carries out when in use, it is necessary to carry out perforate in main pipe now by existing stub (tube)
Welding, then again carries out cylinder the connection that cylinder and main pipe are realized in reaming, troublesome in poeration.
It is used to fill solder when welding groove described in the utility model is welding, realizes welding between cylinder and main pipe
Component, the V-type specifically refer to axially split the cross sectional shape of rear welding groove along cylinder.
Second through hole directly can carry out positioning group pair with lower part main pipe.
The welding groove design of new tube socket, welding groove surface opening bigger, the welding for being conducive to nuclear power plant scene are grasped
Make, and V-type welding groove is not only processed simply, and root of weld loading is small, is conducive to the welding operation at power plant scene.
The operation principle of the utility model：Using the new stub (tube) during nuclear power plant's overhaul to there is the pipe of weld defect
Seat is related to newly weld twice weld seam when being replaced, wherein one newly the weld seam of tube socket and lower part main pipe and together with new tube socket
With the weld seam of top branch pipe.
After the placement corresponding with through hole of the second through hole, welded in welding groove, groove face to be welded and both sides of the edge
(at least answering 15mm) in the range of the enough width of mother metal close region should clean, anhydrous, oxide, greasy dirt and other influence welding matter
Any dirt or objectionable impurities of amount.Groove group pair is carried out using austenitic stainless steel solid point block, at least symmetrical solid point 2, is treated
After the completion of backing welding, then removal solid point of polishing is fast.Welding method can use argon tungsten arc process or argon tungsten-arc welding-craft electricity
Arc-welding group technology welds, and the welding material of selection should all meet weld procedure specification including welding wire, the specifications and models of welding rod will
Ask.
New tube socket described in the utility model is in tube socket fabrication stage, that is, machine addition all-pass pass formula, without scene to main pipe
Perforate and the reaming of cylinder are carried out, directly the tube socket needed replacing can be replaced during nuclear power plant's planned outage.Using
The stub (tube) of this new structure, the big pipe in tube socket bottom and top branch pipe without needing to change, can save nuclear power plant's maintenance duration and
Reduce radioactive solid waste quantity.
Further, the face angle degree of the welding groove is 45 degree.
The face angle degree specifically refers to the gradient of welding groove upper surface, and the upper surface specifically refers to be arranged on cylinder
On inclined-plane.
45 degree of groove make it that the surface opening of welding groove is big and seam root loading is small, is conducive to the weldering at power plant scene
Connect operation.
Further, the root face of welding groove is 1.5-2mm.
The root face specifically refers to welding groove bottom the distance between to the second through hole.
Further, the bottom width of welding groove is 0-1mm.
The above-mentioned width fits gradient, is conducive to save solder.
Further, the height of cylinder is higher 10mm than the tube socket that need to repair replacement.
For new tube socket compared with intrinsic stub (tube), tube socket wall thickness is constant, its intensity is suitable；Top pipe nozzle size is not
Become, do not influence top adapter.New tube socket is than former design stub (tube) total length increase 10mm, easy to be tieed up to original design tube socket
Welding heat affected section is cut off during repairing to top adapter to compensate, without to top adapter completely newly replace and again
Prefabricated, its maintenance work reduces as far as possible；Simultaneously as tube socket wall thickness is much larger than the pipeline wall thickness of top adapter, new adapter
Seat length increase does not influence the mechanics evaluation result of original pipeline.
Further, solder areas is formed after welding groove filling solder, the reinforcement of the solder areas is 6-8mm.
The lower part that the reinforcement specifically refers to solder areas protrudes from the length of welding groove.
Further, cylinder is made of austenitic stainless steel.
The austenitic stainless steel is prior art material.
The utility model compared with prior art, has the following advantages and advantages：
1st, new tube socket is designed as all-pass pore structure, is directly welded with lower part main pipe, it is not necessary to first weld and drill through again
Through hole, improves the convenience of operation.
2nd, new tube socket total height is more first welded the tube socket that drills afterwards and is lengthened, to the Zhi Guanchang cut off during branch pipe reflow
Degree has carried out effective compensation；Effectively reduce workload when replacing stub (tube).
3rd, new tube socket lower weld groove is designed using unilateral V-type, and the J-type groove compared to former tube socket designs, groove
Surface opening is big and root of weld loading is small, is conducive to the welding operation at power plant scene, and retaining wall on slope is simple.
Brief description of the drawings
Attached drawing described herein is used for providing further understanding the utility model embodiment, forms the one of the application
Part, does not form the restriction to the utility model embodiment.In the accompanying drawings：
Fig. 1 is the structure diagram that existing stub (tube) coordinates with main pipe；
Fig. 2 is the structure diagram of new tube socket；
Fig. 3 is new tube socket and the structure diagram after main pipe welding.
Mark and corresponding parts title in attached drawing：
1- cylinders, 2- welding grooves, 3- main pipes, 4- solder areas, 11- first through hole, the second through holes of 12-, 31- through holes.
Embodiment
For the purpose of this utility model, technical solution and advantage is more clearly understood, with reference to embodiment and attached drawing,
The utility model is described in further detail, and the exemplary embodiment and its explanation of the utility model are only used for explaining this
Utility model, is not intended to limit the scope of the present invention.
Embodiment 1：
As shown in Figure 2 and Figure 3, a kind of new tube socket replaced suitable for PWR nuclear power plant maintenance, including cylinder 1, it is described
Cylinder 1 includes upper linker and lower part connecting pin, the upper linker and top branch pipe welding, the lower part connecting pin with
Lower part main pipe is welded, and the upper linker is provided with first through hole 11 along axis, and the lower end of the cylinder 1 is provided with weldering
Groove 2 is connect, the lower part connecting pin is provided with the second through hole 12 along axis, and second through hole 12 is logical with being opened up in main pipe 3
The size in hole 31 is consistent, realizes that cylinder 1 is connected with main pipe 3 by the second through hole 12 and the connection of through hole 31, the welding groove 2 is
V-type；The face angle degree of the welding groove 2 is 45 degree；The root face of the welding groove 2 is 1.5-2mm；The welding groove
2 bottom width is 1mm.
Embodiment 2：
As shown in Figure 2 and Figure 3, the present embodiment is based on embodiment 1, and the height of the cylinder 1 is higher than the tube socket that need to repair replacement
10mm；The welding groove 2 forms solder areas 4 after filling solder, and the reinforcement of the solder areas 4 is 6-8mm；The cylinder 1 is adopted
It is made of austenitic stainless steel.
Above-described embodiment, the purpose of this utility model, technical solution and beneficial effect have been carried out into
One step describes in detail, it should be understood that the foregoing is merely specific embodiment of the present utility model, is not used to limit
Determine the scope of protection of the utility model, where within the spirit and principles of the present invention, any modification for being made, equally replace
Change, improve, should be included within the scope of protection of this utility model.
Claims (7)
1. a kind of new tube socket replaced suitable for PWR nuclear power plant maintenance, including cylinder (1), the cylinder (1) include upper
Portion connecting pin and lower part connecting pin, the upper linker are provided with first through hole (11), the lower end of the cylinder (1) along axis
It is provided with welding groove (2), it is characterised in that the lower part connecting pin is provided with the second through hole (12) along axis, and described second
The size of through hole (31) of the through hole (12) with being opened up in main pipe (3) is consistent, and the welding groove (2) is V-type.
A kind of 2. new tube socket replaced suitable for PWR nuclear power plant maintenance according to claim 1, it is characterised in that
The face angle degree of the welding groove (2) is 45 degree.
A kind of 3. new tube socket replaced suitable for PWR nuclear power plant maintenance according to claim 1, it is characterised in that
The root face of the welding groove (2) is 1.5-2mm.
A kind of 4. new tube socket replaced suitable for PWR nuclear power plant maintenance according to claim 1, it is characterised in that
The bottom width of the welding groove (2) is 0-1mm.
A kind of 5. new tube socket replaced suitable for PWR nuclear power plant maintenance according to claim 1, it is characterised in that
The height of the cylinder (1) is higher 10mm than the tube socket that need to repair replacement.
A kind of 6. new tube socket replaced suitable for PWR nuclear power plant maintenance according to claim 1, it is characterised in that
Solder areas (4) are formed after welding groove (2) the filling solder, the reinforcement of the solder areas (4) is 6-8mm.
A kind of 7. new tube socket replaced suitable for PWR nuclear power plant maintenance according to claim 1, it is characterised in that
The cylinder (1) is made of austenitic stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721332196.XU CN207316330U (en) | 2017-10-16 | 2017-10-16 | A kind of new tube socket replaced suitable for PWR nuclear power plant maintenance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721332196.XU CN207316330U (en) | 2017-10-16 | 2017-10-16 | A kind of new tube socket replaced suitable for PWR nuclear power plant maintenance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207316330U true CN207316330U (en) | 2018-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721332196.XU Active CN207316330U (en) | 2017-10-16 | 2017-10-16 | A kind of new tube socket replaced suitable for PWR nuclear power plant maintenance |
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| CN (1) | CN207316330U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112916990A (en) * | 2021-01-26 | 2021-06-08 | 中广核核电运营有限公司 | Replacement method of nuclear grade branch pipe seat |
-
2017
- 2017-10-16 CN CN201721332196.XU patent/CN207316330U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112916990A (en) * | 2021-01-26 | 2021-06-08 | 中广核核电运营有限公司 | Replacement method of nuclear grade branch pipe seat |
| CN112916990B (en) * | 2021-01-26 | 2023-01-17 | 中广核核电运营有限公司 | Replacement method of nuclear grade branch pipe seat |
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