CN209363998U - It is a kind of for replacing the special right angle boring cutter of expanded joint bulge U-shaped heat exchanger tube - Google Patents
It is a kind of for replacing the special right angle boring cutter of expanded joint bulge U-shaped heat exchanger tube Download PDFInfo
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- CN209363998U CN209363998U CN201822147485.3U CN201822147485U CN209363998U CN 209363998 U CN209363998 U CN 209363998U CN 201822147485 U CN201822147485 U CN 201822147485U CN 209363998 U CN209363998 U CN 209363998U
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- heat exchanger
- exchanger tube
- right angle
- expanded joint
- pipe
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Abstract
The utility model discloses a kind of for replacing the special right angle boring cutter of expanded joint bulge U-shaped heat exchanger tube, including the knife bar that can be assembled the knife handle being fixed on drilling machine He be fixedly arranged on knife handle front end, the end of knife bar, which is detachably fixed, is connected with one perpendicular to its axial blade, and right angle boring cutter also needs to meet following requirement: knife bar radiusd 0/ 2 protrude the length of knife bar with bladeL 0The sum of be greater than or equal to U-shaped heat exchanger tube outer diameter D half；Knife bar diameterd 0With the length of blade protrusion knife barL 0The sum of be less than U-shaped heat exchanger tube outer diameter D and twice U-shaped and exchange heat thickness of pipe wallδDifference.The utility model is broken heat exchanger tube boring using right angle boring cutter, the heat exchanger tube that boring is broken is extracted from tube bank tail portion, expanded joint section inner wall machine is added and subtracted again thin, under the action of cutter cuts power, cutting heat, it is released the expanded joint stress in exchanger tubes and tubesheets hole, then machine adds pipe end weld seam and wears connecting rope, so that bulge pipe nipple is slided to pipe nozzle and takes out pipe nipple, new pipe, closure are penetrated, pipe is changed in completion.
Description
Technical field
It is the utility model relates to shell-and-tube heat exchanger manufacturing technology field, in particular to a kind of for replacing expanded joint drum
The special right angle boring cutter of packet U-shaped heat exchanger tube.
Background technique
In the manufacturing process of shell-and-tube U-shaped pipe heat exchanger, the exchanger tubes and tubesheets in heat exchanger U-shaped tube bank outer ring are swollen
When connecing, verification expanded joint length is needed before swollen.If not checking expanded joint length and misusing expanding rod, it will cause expanded joint beyond tube sheet shell-side
Surface, heat exchanger tube will will appear bulge, the referred to as bulge of heat exchanger tube expanded joint；Expanded joint bulge once occurs for heat exchanger tube, it is necessary to by it
It replaces, and the key for changing pipe is tube drawing.Since the outer diameter at heat exchanger tube expanded joint bulge is greater than the aperture of tube sheet and baffle plate,
Therefore heat exchanger tube can not directly be extracted out of tube sheet or baffle hole using drawbench, to considerably increase replacement expanded joint drum
It guarantees replacement the difficulty of heat pipe.
For this purpose, existing be badly in need of developing a kind of method that can effectively replace expanded joint bulge U-shaped heat exchanger tube.
Utility model content
Technical problem to be solved in the utility model is to provide one kind In view of the above shortcomings of the prior art to be used for
Replace the special right angle boring cutter of expanded joint bulge U-shaped heat exchanger tube.
The technical scheme adopted by the utility model to solve the technical problem is as follows: a kind of change for replacing expanded joint bulge U-shaped
The special right angle boring cutter of heat pipe, the right angle boring cutter include that can assemble the knife handle being fixed on drilling machine and be fixedly arranged on the knife handle
The knife bar of front end, the end of the knife bar, which is detachably fixed, is connected with a blade perpendicular to its axial direction, and the right angle
Boring cutter also needs to meet following requirement: knife bar radiusd 0/ 2 protrude the length of knife bar with bladeL 0The sum of be greater than or equal to U-shaped heat exchanger tube
The half of outer diameter D；Knife bar diameterd 0With the length of blade protrusion knife barL 0The sum of be less than U-shaped heat exchanger tube outer diameter D changed with twice of U-shaped
Heat pipe wall thicknessδDifference, be both able to achieve the knife bar of right angle boring cutter extend into heat exchanger tube to realize, moreover it is possible to pass through right angle boring cutter
Blade heat exchanger tube boring is broken from heat transfer tube wall.
Further, the blade is carbide-tipped cutter bit, to guarantee the use intensity of right angle boring cutter.
Further, the drilling machine is numerical control floor boring machine or movable universal radial drilling machine.
The invention also discloses a kind of method for being used to replace expanded joint bulge U-shaped heat exchanger tube for above-mentioned right angle boring cutter,
Replacing options include the following steps: to cut the circumferential weld between casing cylinder tail portion and end socket；By the assembly of right angle boring cutter on drilling machine,
And U-shaped heat exchanger tube boring is broken from the non-tube expansion section inner wall of U-shaped heat exchanger tube bulge section front end using right angle boring cutter；Using drilling machine to U
Shape heat exchanger tube expanded joint section inner wall carries out machine and adds, and U-shaped heat exchanger tube expanded joint section wall thickness is thinned；Boring is broken from U-shaped heat-exchanging tube bundle tail portion
Big section U-shaped heat exchanger tube extracts casing cylinder；Using the weld seam between drilling machine plus removal bulge pipe nipple end and tube sheet, dismantles and connect
Pipe water pressure end cap, then penetrate connecting rope from bulge pipe nipple nozzle and be pierced by from pipe nozzle, bulge pipe nipple is tapped later, keeps bulge short
Section loosens and slides to pipe nozzle along connecting rope, takes out bulge pipe nipple；New U-shaped heat exchanger tube is penetrated, and by new U-shaped heat exchanger tube and is managed
Plate carries out welding and expanded joint；Again the circumferential weld between casing cylinder tail portion and end socket, closure cylinder are welded.
The step for circumferential weld cut between casing cylinder tail portion and end socket, need to only exchange heat in the big section U-shaped that boring is broken
Pipe carries out before extracting the step for casing cylinder.
It is described that U-shaped heat exchanger tube boring is broken from the non-tube expansion section inner wall of U-shaped heat exchanger tube bulge section front end by this using right angle boring cutter
One step can be exchanged with the step for being added using drilling machine to U-shaped heat exchanger tube expanded joint section inner wall progress machine.
The step for weld seam added between removal bulge pipe nipple end and tube sheet using drilling machine, can be taken over dismantling
The step for water pressure end cap, exchanges.
Further, before expanded joint bulge U-shaped heat exchanger tube is broken in boring, first rotation case cylinder assembly is needed, expanded joint bulge U-shaped is changed
It is arranged immediately below heat pipe without other U-shaped heat exchanger tubes, to prevent machine added-time iron filings from falling under gravity to expanded joint bulge heat exchange
It can not be cleared up on heat-exchanging tube bundle around pipe.
Further, it is using drilling machine and is cooperating machine that cutter is added to carry out the machine added-time to U-shaped heat exchanger tube expanded joint section inner wall, cutter is straight
The selection of diameter at least should allow maximum diameter of hole 0.5mm or more small than tubesheet holes, and cutter is using external chip discharging design, to avoid machine plus
When damage tubesheet holes and facilitate chip removal.
It further, need to be from the pipe nozzle neighbouring with bulge pipe nipple when the connecting rope is pierced by from the pipe nozzle of casing cylinder
It is pierced by, so that bulge pipe nipple be made to slide the smallest stroke, so that it is quickly slided to pipe nozzle, and take out bulge pipe nipple.
Further, before welding the circumferential weld between casing cylinder tail portion and end socket again, the forming ring that need to polish again stitches slope
Mouthful, and require scarfing the smaller the better, to be maintained at its overall length amount of shortening for after casing cylinder component again welding fabrication
Within the scope of 10-15mm, while during polishing groove again, heat pipe bundle need to be exchanged and carry out covering protection processing, to prevent
Polishing iron filings exchange heat pipe bundle is polluted and is damaged.
Further, it after the circumferential weld being welded between casing cylinder tail portion and end socket again, need to detect a flaw to the circumferential weld,
Flaw detection mode is the first floor, every three layers of PT and final weld seam PT/UT, guarantees weldquality.
The beneficial effects of the utility model are:
The utility model using special right angle boring cutter and cooperate numerical control floor boring machine by heat exchanger tube in front of bulge section not
Tube expansion section inner wall boring is disconnected, then cuts seal head girth, and the big section heat exchanger tube that first boring is broken extracts outer shell barrel from heat-exchanging tube bundle tail portion
Body adds cutter exchange heat pipe expanded joint section inner wall to carry out machine plus-minus material, expanded joint section wall thickness, heat exchanger tube and pipe is thinned using machine again later
Interfacial contact stress between plateP cMeeting adds the mutual comprehensive function of Tool in Cutting power and cutting thermal stress because of trommel and machine
Reduce down, and tube wall machine adds Reducing thicknessΔ rIt is bigger,P cReduction is more obvious, and is equivalent in radius r+Δ rThe residual stress at place
σr+ΔrIt disappears, to maintain stress balance,P cIt is corresponding to reduce, so that the interface expanded joint stress between exchanger tubes and tubesheets hole be made to obtain
Significant release, machine adds removal bulge pipe nipple pipe end weld seam later, then penetrates connecting rope from bulge pipe nipple nozzle, and from tube sheet neighbour
Close casing cylinder pipe nozzle is pierced by, and is allowed to loosen by tapping bulge pipe nipple, it is made to slide to pipe nozzle along connecting rope, thus
Successfully bulge pipe nipple is taken out, it is last only to penetrate new heat exchanger tube, and welding equipment sealing shell cylinder again；Thus may be used
Know, the utility model right angle boring cutter is used to replace expanded joint bulge U-shaped heat exchanger tube, can favorably accomplish and expanded joint bulge U-shaped is changed
The replacement of heat pipe, so that can not directly expanded joint bulge U-shaped heat exchanger tube be extracted using drawbench in the prior art by effectively overcoming
The shortcomings that baffle plate or tubesheet holes, while the utility model rejects the expanded joint section in tube sheet without flat chisel is used, therefore
Tubesheet holes will not be injured, so the right angle boring cutter of the utility model is highly widely popularized and uses.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of horizontal fixed tube sheet U-shaped pipe heat exchanger；
Fig. 2 is the schematic diagram using the disconnected heat exchanger tube of right angle boring cutter boring；
Fig. 3 is the schematic diagram of heat exchanger tube expanded joint section inner wall machine plus-minus material；
Fig. 4 is the interfacial stress analysis model schematic between exchanger tubes and tubesheets；
Fig. 5 is the sectional view along A-A of Fig. 4；
Fig. 6 is the schematic diagram of bulge pipe nipple of choosing；
Fig. 7, Fig. 8 are the structural schematic diagrams of right angle boring cutter；
In the figure, it is marked as 1- casing cylinder, 2- end socket, 3-U shape heat exchanger tube, 4- bulge section, the non-tube expansion section of 5-, 6- expanded joint
Section, 7- tube sheet, 8- weld seam, 9- adapter tube, 10- connecting rope, 11- circumferential weld, 12- knife handle, 13- knife bar, 14- blade, the boring of the right angle 15-
Knife, 16- drill bit, 17- bulge pipe nipple,d 0Knife bar diameter,L 0The length of blade protrusion knife bar, D-U shape heat exchange pipe outside diameter,δU-shaped
Exchange heat thickness of pipe wall, a- cut-off part.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and examples.
As Figure 1-Figure 8, the utility model is used to replace the special right angle boring cutter of expanded joint bulge U-shaped heat exchanger tube, including
The cylindrical knife shank 12 being fixed on drilling machine and the cylinder shape knife rod 13 for being fixedly arranged on 12 front end of knife handle, the knife bar can be assembled
13 end, which is detachably fixed, is connected with one perpendicular to its axial carbide-tipped cutter bit 14, is carried out more with facilitating to blade 14
Change and guarantee the use intensity of blade 14, and 15 dimensions of right angle boring cutter also needs to meet following requirement: knife bar
Radiusd 0/ 2 protrude the length of knife bar with bladeL 0The sum of be greater than or equal to U-shaped heat exchanger tube outer diameter D half；Knife bar diameterd 0With
The length of blade protrusion knife barL 0The sum of be less than U-shaped heat exchanger tube outer diameter D and twice U-shaped and exchange heat thickness of pipe wallδDifference, thus realize both
The knife bar 13 of right angle boring cutter 15 can be extend into U-shaped heat exchanger tube 3, moreover it is possible to be exchanged heat by the blade 14 of right angle boring cutter 15 from U-shaped
3 inner wall of pipe breaks 3 boring of U-shaped heat exchanger tube.
The drilling machine uses numerical control floor boring machine or movable universal radial drilling machine.
The invention also discloses a kind of sides that above-mentioned right angle boring cutter 15 is used to replace expanded joint bulge U-shaped heat exchanger tube
Method, the replacing options of expanded joint bulge U-shaped heat exchanger tube, include the following steps: using abrasive cut-off wheel machine-cut open 1 tail portion of casing cylinder with
Circumferential weld 11 between end socket 2；The assembly of right angle boring cutter 15 is fixed on drilling machine, and is roused using right angle boring cutter 15 from U-shaped heat exchanger tube 3
Non- 5 inner wall of tube expansion section of 4 front end of packet section breaks 3 boring of U-shaped heat exchanger tube；3 expanded joint section of U-shaped heat exchanger tube, 6 inner wall is carried out using drilling machine
Machine adds, and 3 expanded joint section of U-shaped heat exchanger tube, 6 wall thickness is thinned；Outside the big section U-shaped heat exchanger tube 3 that boring is broken is extracted from U-shaped heat-exchanging tube bundle tail portion
Thimble body 1；Using the weld seam 8 between drilling machine plus removal 17 end of bulge pipe nipple and tube sheet 7,9 water pressure end cap of adapter tube is dismantled, then
Connecting rope 10 is penetrated from 17 nozzle of bulge pipe nipple and is pierced by from pipe nozzle, taps bulge pipe nipple 17 later, keeps bulge pipe nipple 17 loose
It moves and slides to pipe nozzle along connecting rope 10, take out bulge pipe nipple 17；Penetrate new U-shaped heat exchanger tube 3, and by new U-shaped heat exchanger tube 3 with
Tube sheet 7 carries out welding and expanded joint；Again the circumferential weld 11 between 1 tail portion of casing cylinder and end socket 2, closure cylinder 1 are welded；Weight
Newly weld appropriate 9 water pressure end cap of adapter tube, promoting the circulation of qi tightness test of going forward side by side.
Before expanded joint bulge U-shaped heat exchanger tube is broken in boring, first rotation case cylinder assembly is needed, makes expanded joint bulge U-shaped heat exchanger tube just
Lower section does not have other U-shaped heat exchanger tubes to arrange, to prevent machine added-time iron filings from falling under gravity to around expanded joint bulge heat exchanger tube
Heat-exchanging tube bundle on and can not clear up.
It is using drilling machine and is cooperating machine that cutter is added to carry out the machine added-time 3 expanded joint section of U-shaped heat exchanger tube, 6 inner wall, tool dimension rule
Lattice need to be selected according to the circle bounce precision of machine added-time, specifically, the selection of cutter diameter at least should allow maximum than tubesheet holes
The small 0.5mm or more in aperture, and cutter is designed using external chip discharging, is damaged tubesheet holes to avoid the machine added-time and is facilitated chip removal.
When the connecting rope 10 is pierced by from the pipe nozzle of casing cylinder 1, it need to be worn from the pipe nozzle neighbouring with bulge pipe nipple 17
Out, so that bulge pipe nipple 17 be made to slide the smallest stroke, it is made quickly to slide to pipe nozzle, and takes out bulge pipe nipple 17.
Before welding the circumferential weld 11 between 1 tail portion of casing cylinder and end socket 2 again, the forming ring that need to polish again stitches groove,
And it is required that scarfing is the smaller the better, to make its overall length amount of shortening be maintained at 10- for after casing cylinder component again welding fabrication
Within the scope of 15mm, to meet standard requirements, while during polishing groove again, heat pipe bundle need to be exchanged and carry out covering protection
Processing, to prevent polishing iron filings exchange heat pipe bundle from polluting and damaging.
After the circumferential weld 11 being welded between 1 tail portion of casing cylinder and end socket 2 again, it need to detect a flaw to the circumferential weld 11,
Flaw detection mode is the first floor, every three layers of PT and final weld seam PT/UT, guarantees weldquality.
It should be understood that the step for circumferential weld 11 cut between 1 tail portion of casing cylinder and end socket 2, need to only incite somebody to action
It is carried out before the step for disconnected big section U-shaped heat exchanger tube 3 of boring extracts casing cylinder 1；It is described to use right angle boring cutter 15 from U-shaped
The step for non-5 inner wall of tube expansion section of 3 bulge section of heat exchanger tube, 4 front end is disconnected by 3 boring of U-shaped heat exchanger tube can change U-shaped with using drilling machine
The step for 3 expanded joint section of heat pipe, 6 inner wall progress machine adds, exchanges；It is described that removal 17 end of bulge pipe nipple and tube sheet 7 are added using drilling machine
Between weld seam 8 the step for can be with exchange the step for dismantling 9 water pressure end cap of adapter tube.
The utility model using special right angle boring cutter and cooperate numerical control floor boring machine by heat exchanger tube in front of bulge section not
Tube expansion section inner wall boring is disconnected, then cuts seal head girth, and the big section heat exchanger tube that first boring is broken extracts outer shell barrel from heat-exchanging tube bundle tail portion
Body adds cutter exchange heat pipe expanded joint section inner wall to carry out machine plus-minus material, expanded joint section wall thickness, heat exchanger tube and pipe is thinned using machine again later
Interfacial contact stress between plateP cMeeting adds the mutual comprehensive function of Tool in Cutting power and cutting thermal stress because of trommel and machine
Reduce down, and tube wall machine adds Reducing thicknessΔ rIt is bigger,P cReduction is more obvious, and is equivalent in radius r+Δ rThe residual stress at place
σr+ΔrIt disappears, to maintain stress balance,P cIt is corresponding to reduce, so that the interface expanded joint stress between exchanger tubes and tubesheets hole be made to obtain
Significant release, machine adds removal bulge pipe nipple pipe end weld seam later, then penetrates connecting rope from bulge pipe nipple nozzle, and from tube sheet neighbour
Close casing cylinder pipe nozzle is pierced by, and is allowed to loosen by tapping bulge pipe nipple, it is made to slide to pipe nozzle along connecting rope, thus
Successfully bulge pipe nipple is taken out, it is last only to penetrate new heat exchanger tube, and welding equipment sealing shell cylinder again；Thus may be used
Know, the utility model right angle boring cutter is used to replace expanded joint bulge U-shaped heat exchanger tube, can favorably accomplish and expanded joint bulge U-shaped is changed
The replacement of heat pipe, so that can not directly expanded joint bulge U-shaped heat exchanger tube be extracted using drawbench in the prior art by effectively overcoming
The shortcomings that baffle plate or tubesheet holes, while the utility model rejects the expanded joint section in tube sheet without flat chisel is used, therefore
Tubesheet holes will not be injured, so the utility model right angle boring cutter is highly widely popularized and uses.
Embodiment
Below by taking certain two generation adds nuclear leve heat exchanger as an example, come be described in detail using the special right angle boring cutter of the utility model come
Replace the specific method of expanded joint bulge U-shaped heat exchanger tube:
The shell-and-tube heat exchanger is horizontal fixed tube sheet U-shaped pipe heat exchanger, is mainly restrained by bobbin carriage, shell, tube sheet
The attachmentes such as component and support composition, bobbin carriage, tube sheet Bundle material be 022Cr19Ni10, casing cylinder material be 20,
20HR-B, casing cylinder specification are 406.4mm × 8.74 ф, and U-shaped heat exchange tube specification is 14mm × 1 φ, and quantity is 79；Tube sheet
After tube bundle assembly and casing cylinder are welded into entirety, when carrying out U-shaped exchanger tubes and tubesheets strength and buckling, U-tube bundle outer ring has 2
Expanded joint bulge occurs for heat exchanger tube.
It is unable to plugging by TEMA standard requirements since expanded joint bulge heat exchanger tube is located at tube bank outer ring, can only carry out changing pipe,
This method can be used thus to replace 2 heat exchanger tubes that expanded joint bulge occurs.
Specific replacement step are as follows:
Step 1 cuts seal head girth；The circumferential weld between casing cylinder tail portion and end socket is first killed out using abrasive cut-off wheel machine,
And polishing welding seams divided edge molding again；It is required that scarfing is the smaller the better, so as to will be total after casing cylinder component again welding fabrication
The long amount of shortening control meets standard requirements within the scope of 10-15mm；Again when polishing groove, heat-exchanging tube bundle should be covered
Protection processing, to prevent polishing iron filings from tube bank being caused to pollute and damage；
Step 2, boring is broken, and simultaneously machine adds heat transfer tube wall to heat exchanger tube；Before starting processing, first casing cylinder component is turned
It is dynamic, so that 270 ° of four-quadrants is exactly in the following position directly perpendicular to boring machine workbench, make expanded joint bulge U-shaped heat exchanger tube just under
Side is arranged without other U-shaped heat exchanger tubes, to prevent machine added-time iron filings from falling under gravity to around expanded joint bulge heat exchanger tube
It can not be cleared up on heat-exchanging tube bundle；After being fixedly clamped, first with right angle boring cutter cooperation numerical control floor boring machine or mobile universal rocker arm
Drilling machine breaks heat exchanger tube boring from the non-tube expansion section inner wall of heat exchanger tube bulge section front end, changes 16 machine of drill bit of 13.5 mm of φ again later
Add heat exchanger tube expanded joint section inner wall, heat exchanger tube expanded joint section wall thickness is thinned；
Step 3 dismantles adapter tube water pressure end cap, cleaning iron filings；First polishing is removed and the neighbouring adapter tube hydraulic pressure end of bulge pipe nipple
Freshly prepared groove of laying equal stress on is covered, casing cylinder component is rotated counterclockwise 90 °, so that machine adds iron filings sliding along casing cylinder inner wall
To adapter tube, then cleaned up out of casing cylinder from adapter tube port by iron filings；
Step 4, tube drawing take bulge pipe nipple；The big section heat exchanger tube that first boring is broken from heat-exchanging tube bundle tail end is extracted, and then machine adds
Pipe end weld seam is removed, then penetrates connecting rope from bulge pipe nipple nozzle, and be pierced by from shell pipe nozzle, tapping bulge pipe nipple later makes
Loosening, and it is made to slide to pipe nozzle along connecting rope, takes out bulge pipe nipple, after taking out bulge pipe nipple, surveyed with dial bore gage
Tube sheet aperture maximum φ 14.39mm is obtained, design requirement is met；
Step 5 penetrates new pipe, Seal welding again, and utilizes product clout solder up weldering witness part；
Step 6, again welding equipment seal head girth；Welding is filled by original process using manual TIG weldering bottoming+welding electrode arc welding,
Ensure single face welding and double face shaping；Postwelding is since heat-exchanging tube bundle interference can not carry out RT, using the first floor, every three layers of PT and most
The flaw detection mode of whole weld seam PT/UT is detected a flaw, and wherein UT need to prepare reference block, and refer to national standard NB/T47013.3-2015
Annex K is executed, and is saved and is checked and accepted by NB/T47013.3-2015 6.5.1；
Step 7 welds appropriate adapter tube water pressure end cap again, promoting the circulation of qi tightness test of going forward side by side；
Step 8 re-starts Hydraulic Expansion, after expanded joint passed examination, carries out helium leak test by original process and shell side hydraulic pressure tries
It tests.
Changed after pipe reprocesses by above-mentioned steps implementation, casing cylinder size of components Attorney-General reduces 10mm, end socket inner wall with
The interbank gap for still having 7mm, within an acceptable range, and remaining coherence check is disposable qualified, reprocesses and smoothly completes.
It should be understood that the above-mentioned specific embodiment of the utility model is used only for exemplary illustration or explains this reality
With novel principle, without constituting limitations of the present invention.Therefore, in the spirit and scope without departing from the utility model
In the case of any modification, the equivalent replacement etc. made, should be included within the scope of protection of this utility model.
Claims (3)
1. a kind of for replacing the special right angle boring cutter of expanded joint bulge U-shaped heat exchanger tube, which is characterized in that the right angle boring cutter
It (15) include the knife bar (13) that can be assembled the knife handle (12) being fixed on drilling machine and be fixedly arranged on the knife handle (12) front end, the knife
The end of bar (13), which is detachably fixed, is connected with one perpendicular to its axial blade (14), and the right angle boring cutter (15) is also
Following requirement: knife bar radius need to be metd 0/ 2 protrude the length of knife bar with bladeL 0The sum of be greater than or equal to U-shaped heat exchanger tube outer diameter D
Half；Knife bar diameterd 0With the length of blade protrusion knife barL 0The sum of be less than U-shaped heat exchanger tube outer diameter D and twice U-shaped and exchange heat tube wall
It is thickδDifference.
2. according to claim 1 for replacing the special right angle boring cutter of expanded joint bulge U-shaped heat exchanger tube, which is characterized in that
The blade (14) is carbide-tipped cutter bit.
3. according to claim 1 for replacing the special right angle boring cutter of expanded joint bulge U-shaped heat exchanger tube, which is characterized in that
The drilling machine is numerical control floor boring machine or movable universal radial drilling machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822147485.3U CN209363998U (en) | 2018-12-20 | 2018-12-20 | It is a kind of for replacing the special right angle boring cutter of expanded joint bulge U-shaped heat exchanger tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822147485.3U CN209363998U (en) | 2018-12-20 | 2018-12-20 | It is a kind of for replacing the special right angle boring cutter of expanded joint bulge U-shaped heat exchanger tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209363998U true CN209363998U (en) | 2019-09-10 |
Family
ID=67829825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822147485.3U Withdrawn - After Issue CN209363998U (en) | 2018-12-20 | 2018-12-20 | It is a kind of for replacing the special right angle boring cutter of expanded joint bulge U-shaped heat exchanger tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209363998U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109396770A (en) * | 2018-12-20 | 2019-03-01 | 东方电气集团东方锅炉股份有限公司 | A kind of replacing options and special right angle boring cutter of expanded joint bulge U-shaped heat exchanger tube |
-
2018
- 2018-12-20 CN CN201822147485.3U patent/CN209363998U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109396770A (en) * | 2018-12-20 | 2019-03-01 | 东方电气集团东方锅炉股份有限公司 | A kind of replacing options and special right angle boring cutter of expanded joint bulge U-shaped heat exchanger tube |
| CN109396770B (en) * | 2018-12-20 | 2023-10-20 | 东方电气集团东方锅炉股份有限公司 | Replacement method of expansion-connection bulge U-shaped heat exchange tube and special right-angle boring cutter |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20190910 Effective date of abandoning: 20231020 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20190910 Effective date of abandoning: 20231020 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |