JPH0331023U - - Google Patents
Info
- Publication number
- JPH0331023U JPH0331023U JP9099189U JP9099189U JPH0331023U JP H0331023 U JPH0331023 U JP H0331023U JP 9099189 U JP9099189 U JP 9099189U JP 9099189 U JP9099189 U JP 9099189U JP H0331023 U JPH0331023 U JP H0331023U
- Authority
- JP
- Japan
- Prior art keywords
- spring
- hydraulic pressure
- mandrel
- ring
- flexible back
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000005489 elastic deformation Effects 0.000 claims 1
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
Landscapes
- Clamps And Clips (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Description
第１図と第２図とは本考案に係る液圧拡管工具
の１実施例を示すそれぞれ半断面図と第１図中Ａ
部拡大断面図とであり、第３図と第４図とは拡管
作業のプロセスを示すそれぞれ半断面図である。
第５図は熱交換器の断面図であり、第６図は管板
と伝熱管の接合状態を示す断面図である。第７図
と第８図とは従来の液圧拡管工具とその使用状態
とを示すそれぞれ半断面図であり、第９図と第１
０図とはそれぞれ伝熱管の拡管率とフレキシブル
バツクアツプリングの拡開率とを示すグラフであ
る。
図中、３……管板、４……伝熱管、１３……取
付穴、１４……液圧拡管工具、１５……マンドレ
ル、１６……油通路、１７……フレキシブルバツ
クアツプリング、１８……バツクアツプリング、
１９……ウレタンゴムリング、２０……Ｏリング
、２１……作動油、２４……第１の係止リング、
２５……第２の係止リングである。
Figures 1 and 2 are a half-sectional view and A in Figure 1, respectively, showing one embodiment of the hydraulic pipe expansion tool according to the present invention.
FIG. 3 and FIG. 4 are half-sectional views showing the process of pipe expansion work.
FIG. 5 is a cross-sectional view of the heat exchanger, and FIG. 6 is a cross-sectional view showing the joint state of the tube plate and the heat exchanger tubes. 7 and 8 are half-sectional views showing a conventional hydraulic pipe expansion tool and its usage state, and FIG. 9 and 1
Figure 0 is a graph showing the expansion ratio of the heat transfer tube and the flexible back-up spring, respectively. In the figure, 3... tube plate, 4... heat transfer tube, 13... mounting hole, 14... hydraulic tube expansion tool, 15... mandrel, 16... oil passage, 17... flexible back up spring, 18... …Backlash Spring,
19... Urethane rubber ring, 20... O ring, 21... Hydraulic oil, 24... First locking ring,
25...Second locking ring.
Claims (1)
、当該管の端部より挿入されて液圧により拡管を
行う液圧拡管工具であつて、 当該液圧拡管工具の主体をなすマンドレルと、 このマンドレルの外面と前記管の内面とに当接
して液圧により軸方向に摺動すると共に弾性変形
により液圧のシールを行う弾性シールと、 前記マンドレルに摺動自在に嵌合し、一端が前
記弾性シールに当接すると共に他端にテーパ状の
楔部が形成されたバツクアツプリングと、 一端が前記マンドレルの端部に固定されると共
に他端が前記バツクアツプリングの楔部に嵌合し
、前記バツクアツプリングの移動に伴い拡開され
るスリツト付きのフレキシブルバツクアツプリン
グと、 前記マンドレルの端部で且つ前記フレキシブル
バツクアツプリングの内側に固定され、前記フレ
キシブルバツクアツプリングに係合してその拡開
を妨げると共に、第１の設定液圧によつて前記フ
レキシブルバツクアツプリングの開放を行う第１
の係止リングと、 前記マンドレルの端部で且つ前記フレキシブル
バツクアツプリングの外側に固定され、前記第１
の設定液圧より高い第２の設定液圧によつて前記
フレキシブルバツクアツプリングに当接して、そ
の拡開を妨げる第２の係止リングと を具えたことを特徴とする液圧拡管工具。[Scope of Claim for Utility Model Registration] A hydraulic pipe expansion tool that is inserted from the end of a pipe and expands the pipe using hydraulic pressure in order to fix the pipe in a mounting hole formed in a tube plate, the said hydraulic pipe expansion tool a mandrel that forms the main body of the tool; an elastic seal that contacts the outer surface of the mandrel and the inner surface of the tube and slides in the axial direction due to hydraulic pressure and seals against the hydraulic pressure through elastic deformation; and an elastic seal that slides on the mandrel. a back-up ring which is freely fitted and has one end abutting the elastic seal and a tapered wedge formed at the other end; and one end fixed to the end of the mandrel and the other end of the back-up spring a flexible back-up spring with a slit that fits into a wedge portion of the ring and expands as the back-up spring moves; A first member that engages with the back-up spring to prevent its expansion, and that opens the flexible back-up spring using a first set hydraulic pressure.
a locking ring fixed to the end of the mandrel and outside the flexible back-up ring, and
A hydraulic pipe expansion tool comprising: a second locking ring that abuts the flexible back-up spring at a second set hydraulic pressure higher than the set hydraulic pressure of the flexible back-up ring and prevents the flexible back-up spring from expanding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9099189U JPH0731852Y2 (en) | 1989-08-03 | 1989-08-03 | Hydraulic expansion tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9099189U JPH0731852Y2 (en) | 1989-08-03 | 1989-08-03 | Hydraulic expansion tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0331023U true JPH0331023U (en) | 1991-03-26 |
| JPH0731852Y2 JPH0731852Y2 (en) | 1995-07-26 |
Family
ID=31640496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9099189U Expired - Lifetime JPH0731852Y2 (en) | 1989-08-03 | 1989-08-03 | Hydraulic expansion tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0731852Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8640337B2 (en) | 2006-07-21 | 2014-02-04 | Mitsubishi Heavy Industries, Ltd. | Pipe expansion method |
-
1989
- 1989-08-03 JP JP9099189U patent/JPH0731852Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8640337B2 (en) | 2006-07-21 | 2014-02-04 | Mitsubishi Heavy Industries, Ltd. | Pipe expansion method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0731852Y2 (en) | 1995-07-26 |
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