CN203843029U - Hydraulic power pipe expander - Google Patents
Hydraulic power pipe expander Download PDFInfo
- Publication number
- CN203843029U CN203843029U CN201420208654.9U CN201420208654U CN203843029U CN 203843029 U CN203843029 U CN 203843029U CN 201420208654 U CN201420208654 U CN 201420208654U CN 203843029 U CN203843029 U CN 203843029U
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- Prior art keywords
- swollen
- bearing
- expansion
- expander
- axle
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- Expired - Lifetime
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- 210000002445 nipple Anatomy 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000007547 defect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 241000083547 Columella Species 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
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- Details Of Heat-Exchange And Heat-Transfer (AREA)
Abstract
The utility model relates to a pipe expander for manufacturing exchange equipment, in particular to a hydraulic power pipe expander. The hydraulic power pipe expander comprises a pipe expander assembly composed of an expansion rod, an expansion shell and expansion bodies, a hydraulic motor and a hydraulic cylinder and is characterized in that the expansion bodies are shaped like a circular cone, the number of the expansion bodies is three or four, the expansion bodies are installed in an expansion shell groove, the two sides of the cross section of the expansion shell groove form an included angle large in the inside and small in the outside, the taper of two longitudinal sides of the cross section of the expansion shell groove is the same as that of each expansion body, no inclined angle exists between the axis of the expansion shell groove and the axis of the expansion shell, no space included angle exists between the axis of each expansion body and the axis of the expansion rod, the taper of the expansion rod is two times that of each expansion body, and the sides, close to a pipe wall, of the expansion bodies are parallel with the axis of the expansion rod. The pipe expander is installed on a forestage supporting plate of a frame, the frame is composed of the forestage supporting plate, a backstage supporting plate and connecting rods, the upper connecting rod is connected with a pipe expander lifting appliance, the hydraulic motor is installed in the frame, an output shaft of the hydraulic motor is connected with a spindle, a tapered hole is formed in the front end of the spindle, a tapered handle is arranged at the rear end of the expansion rod and is inserted in the tapered hole of the spindle, the backstage supporting plate fixes the hydraulic cylinder, and the head of a piston rod of the hydraulic cylinder penetrates through the backstage supporting plate and is connected with the hydraulic motor.
Description
Technical field
The utility model relates to a kind of tube expander that heat-exchange apparatus is used of manufacturing.
Background technology
Shell-and-tube heat exchanger is the heat transmission equipment generally using in every profession and trade, its heat exchanger tube with often adopt swollen sealing and the pull-off strength of guaranteeing of intensity being connected of tube sheet, or adopt paste swollen with gap between elimination tube-to-tube sheet connection hole.Expanded joint mode mainly contains Hydraulic Expansion and two kinds of patterns of mechanical expansion.
Hydraulic Expansion passes into swollen head by highly pressurised liquid, swollen head directly with by expand tube inner surface, contacted also transmission of pressure and reach expanded joint object, mainly contain at present bag formula, O type ring type and the swollen head of rubber type.Expanded joint quality and the precision school of Hydraulic Expansion are high, can realize automation and control, but Hydraulic Expansion input is high, and equipment is complicated, and service working time is long, is applicable to large in batches product and the expanded joint of thick-walled pipe.
The still mechanical expanding that current use is maximum, according to using power difference to be mainly divided into electronic expanded joint and manual expanded joint.Mechanical expanding mode maneuverability, easy to operate, be used for light-wall pipe and small lot multi-assortment production.
No matter mechanical expanding is motorized motions or hand drive, the circumferential power that makes the rotation of tube expander expander roll is only provided, and expander roll axial advance is to become 1 °～2 ° inclinations angle with swollen columella line by the in-built swollen son of swollen shell groove, be that swollen sub-axis becomes 1 °～2 ° space angles of cut with expander roll axis, and the axial force producing realizes.The existence at this inclination angle, makes heat exchanger tube expanded joint position form inner little outer large tapering and curved surface, is divided into from inside to outside and owes swollen, expanded joint and cross swollen three kinds of states; Owe swollen part and can not bear operating pressure; Cross swollen part and lost expanded joint intensity and caused that stress is concentrated, and reduced corrosion resistant performance, affect the service life of heat exchanger.
Along with manufacturing innovation and development, the requirement of client's heat exchanger expanded joint quality is also improving constantly.Research is found, swollen sub-axis and parallel the tube expander of expander roll axis without the space angle of cut, and swollen son is parallel with heat exchanger tube center line with tube wall contact wire, and the circumferential and axial power of tube expander is provided by hydraulic means, can avoid producing mechanical expanding defect.
Summary of the invention
The deficiency that the utility model exists for solving mechanical expanding technology, proposes a kind of swollen sub-axis and expander roll axis without the hydraulic power tube expander of space angle.
Expander roll, swollen shell, swollen molecular tube expander assembly and hydraulic motor, hydraulic cylinder for the technical solution of the utility model Bian, swollen son is arranged in the swollen shell groove of swollen shell, it is characterized in that swollen son becomes circular cone cylindricality, the number of swollen son is 3 or 4, the both sides of swollen shell groove tilt 12 °～15 °, the axis of swollen shell groove and swollen shell is without inclination angle, and swollen sub-axis and expander roll axis are without space angle, and expander roll tapering is 2 times of swollen sub-tapering; Tube expander is arranged in the foreground gripper shoe of a framework, and framework is comprised of foreground gripper shoe, background support plate, upper connecting rod, right connecting rod, left connecting rod, and upper connecting rod is connected with the suspender of suspention tube expander; Hydraulic motor is installed in framework, on the output shaft of hydraulic motor, connect a single mandrel, the front end of axle has taper hole, and the rear end of expander roll has taper shank to be inserted in the taper hole of axle, background support plate fixer cylinder pressure, the piston rod head of hydraulic cylinder is through background support plate connecting fluid pressure motor; Hydraulic cylinder piston rod advances hydraulic motor, axle while advancing together with expander roll, and swollen son is expanded outwardly, and reaches expanded joint object, when piston rod axially exits, pulls hydraulic motor, axle to exit together with expander roll, and swollen son also exits expansion.
The utility model is due to hydraulic motor, hydraulic cylinder, and expander roll, the parts such as swollen shell combine, simple and compact for structure, easy to use.The swollen sub-axis of tube expander and expander roll axis are without the space angle of cut, during expanded joint, swollen son is parallel with expander roll axis with heat exchanger tube inwall contact wire, after expanded joint in the axial inner surface at expanded joint position does not exist little outer large tapering and curved surface, can not cause and owe the defect such as swollen and excessively swollen, improve intensity and the decay resistance of expansion joint yet.The expander roll rotation of tube expander and axial advance provide power with exiting by hydraulic pressure, and expander roll can pause any position in stroke, and processing ease, can realize automatic control.
Accompanying drawing explanation
Fig. 1 is that parallel tube expander structure master of hydraulic power looks schematic diagram;
Fig. 2 is the D-D cross-sectional schematic of Fig. 1;
Fig. 3 is the A-A cross-sectional schematic of Fig. 1;
Fig. 4 is the B-B cross-sectional schematic of Fig. 1;
Fig. 5 is the C-C cross-sectional schematic of Fig. 1;
Fig. 6 is that the K of Fig. 1 is to schematic diagram;
Fig. 7 is that swollen shell part master looks schematic diagram;
Fig. 8 is the schematic top plan view of Fig. 7;
Fig. 9 is the H-H generalized section of Fig. 7;
Figure 10 is the cross-sectional schematic of axle;
Figure 11 is the F-F cross-sectional schematic of Fig. 1;
Figure 12 is swollen son, swollen shell and expander roll assembling relationship figure;
Figure 13 is the schematic top plan view of Figure 12.
The specific embodiment
Embodiment mono-: parallel tube expander of a kind of hydraulic power (referring to accompanying drawing) is by swollen sub 1, swollen shell 2, positioning sleeve 3, holding screw 4, tube connector 5, thread bush 6, double-direction thrust ball bearing 7, thrust axis bearing sleeve 8, internal and external threads cover 9, lining 10, check ring 11, round nut 12, axle sleeve 13, expander roll 14, clamp nut 15, axle 16, nipple 17, ring flange 18, foreground gripper shoe 19, upper connecting rod 20, right connecting rod 34, left connecting rod 35, bearing holder (housing, cover) 21, front single-row ball-bearing 22, middle single-row ball-bearing 24, rear single-row ball-bearing 25, flat key 23, right pull bar 26, left lever 27, hydraulic motor 28, hex nut 29, connecting plate 30, background support plate 31, hydraulic cylinder 32, centring ring 33, rear shaft seal 36, front shaft seal 37, handle 38, limiting plate 39, left gusset 40, right web plate 41, bearing pin 42, split pin 43 forms, in each swollen shell groove 54 of swollen shell 2 corresponding install one swollen sub 1, it is characterized in that swollen son becomes circular cone cylindricality, determines that according to heat exchanger tube diameter and wall thickness the number of swollen son is 3 or 4, swollen shell groove distributes at the leading portion isogonism of swollen shell, 12 °～15 ° (Fig. 2 of both sides, cross section inclination of swollen shell groove, Fig. 7, Fig. 9), longitudinal both sides tapering and the identical (Fig. 7 of swollen sub 1 tapering, Fig. 8), prevent that swollen son from coming off from inside to outside from swollen shell groove, the axis of swollen shell groove and swollen shell is without inclination angle, be swollen sub-axis and expander roll axis without space angle, expander roll leading portion becomes circular cone cylindricality, expander roll inserts in swollen shell cylinder, the taper direction of expander roll is contrary with the taper direction of swollen son, and expander roll tapering is 2 times of swollen sub-tapering, during swollen son work, press close to tube wall side parallel with expander roll axis, avoided the bills due and the defect of transferring items that after common tube expander expanded joint, at expanded joint position, exist tapering, curved surface etc. to cause.
By triangular shape foreground gripper shoe 19 with holes, background support plate 31, with double headed roller step, step small end is the upper connecting rod 20 of screw thread, right connecting rod 34, and left connecting rod 35 use hex nuts are connected and fixed composition framework, tube expander is arranged in the gripper shoe of framework foreground, hydraulic motor is arranged in framework, and hydraulic cylinder is fixed on background support plate, and the suspender that lifts by crane tube expander during work is connected on connecting rod 20.
On the output shaft of hydraulic motor, connect a single mandrel 16, axle front end has taper hole 51, expander roll 14 front ends are cone, middle part is cylinder, rear end is taper shank 52, the taper shank 52 of expander roll rear end is inserted in the taper hole 51 of axle 16, by clamp nut 15, compressed, the small end of taper hole has square hole 50 for exiting expander roll, 18, axle 16 and ring flange have front shaft seal 37 sealings, axle 16 is enclosed within on the output shaft 47 of hydraulic motor by endoporus 49, the outer ring 48 of axle is loaded on front single-row ball-bearing 22, middle single-row ball-bearing 24 and rear single-row ball-bearing 25 inner rings, the outer ring of single-row ball-bearing is arranged in bearing holder (housing, cover) 21, by centring ring 33 axial location, 21 of axle 16 and bearing holder (housing, cover)s have rear shaft seal 36 sealings, single-row ball-bearing is born expander roll and is advanced or exit the axial force causing, bearing holder (housing, cover) 21 is connected and fixed by bolt and nut and hydraulic motor 28, hydraulic motor drives axle and expander roll to rotate by the flat key 23 on output shaft 47, expander roll drives swollen son rotation again, swollen son is circling and is driving swollen shell 2 and 9 rotations of internal and external threads cover around expander roll axis at heat exchanger tube inwall in the rotation of self axis, hydraulic motor can only turn clockwise (side view orientation) can not reverse.
Hydraulic cylinder 32 is fixed on background support plate 31 by hex bolts and nut, and piston rod 45 heads of hydraulic cylinder 32 are through the hole 44 on background support plate 31, and connecting plate 30 is connected with piston rod 45 by piston rod rod end screw thread, and compresses with hex nut 29; Left lever 27 and right pull bar 26 double headed roller steps, step small end is screw thread, by hex nut, connecting plate 30 is connected with bearing holder (housing, cover) 21, when the piston rod 45 of hydraulic cylinder 32 is made axial advance, hydraulic motor 28, axle 16 are advanced together with expander roll 14, and make swollen sub 1 to expand outwardly, reach expanded joint object, when piston rod 45 axially exits, to pull hydraulic motor 28, axle 16 to exit together with expander roll 14, swollen sub 1 also exits expansion; Piston rod 45 connecting plate 30 when making axial advance or exiting slides by being through on the hole 46 on right connecting rod 34, plays guiding and supporting role; The rotation of expander roll 14 and axially-movable do not interfere with each other and can carry out simultaneously, left alone without help of any position that the piston rod 45 of hydraulic cylinder 32 can be in setting stroke.
Swollen shell 2 is threaded connection with internal and external threads cover 9, internal and external threads cover 9 is arranged on the inner ring of double-direction thrust ball bearing 7, by lining 10, located, fixing with round nut 12, the outer ring of double-direction thrust ball bearing 7 is arranged in thrust axis bearing sleeve 8, by check ring 11 axial location, thrust axis bearing sleeve 8 is threaded with axle sleeve 13; Axle sleeve 13 is threaded with nipple 17; Nipple 17 is threaded with ring flange 18; Nipple 17 clamps foreground gripper shoe 19 with ring flange 18, and above connection makes double-direction thrust ball bearing 7 become a fulcrum, and swollen shell 2 is fixed on the inner ring rotation of double-direction thrust ball bearing 7, and double-direction thrust ball bearing 7 is born the axial force of swollen shell 2; Positioning sleeve 3 is fixed on tube connector 5 by holding screw 4, tube connector 5 is threaded with thread bush 6, thread bush 6 is threaded with thrust axis bearing sleeve 8, the end face 55 of positioning sleeve 3 is near tube sheet, and turn thread bush 6 and thrust axis bearing sleeve 8 can be adjusted swollen sub 1 expanded joint position in heat exchanger tube alone or in combination; On positioning sleeve 3, have handle notch 58, its both sides are welded with right web plate 40, left gusset 41, and handle 38 is at right web plate 40, and 58, left gusset 41 and handle notch pass through, and bearing pin 42 is connected with right web plate 40 handle 38 with split pin 43 with left gusset 41; Normal position, pull handle 38, limiting plate 39 on it contacts with positioning sleeve 3, the end face 53 of handle 38 is parallel with heat exchanger tube outer wall, and leaves gap, before expanded joint, pushes handle 38 to tube sheet, end face 53 blocks heat exchanger tube, avoid expanded joint starting stage heat exchanger tube occur to rotate or rock, the end of positioning sleeve 3 has symmetrical left observation panel 56, right observation panel 57, the situation of change of the mouth of pipe when observing expanded joint.
Embodiment bis-: according to the specific embodiment of embodiment mono-, swollen shell is taken in while establishing three swollen shell grooves, and three swollen shell grooves are mutually 120 ° in the distribution of circumference; While establishing 4 swollen shell grooves on swollen shell, four swollen shell grooves are in 90 ° mutually in the distribution of circumference.
Embodiment tri-: according to the specific embodiment of embodiment mono-or embodiment bis-, expander roll tapering is 2 times of swollen sub-tapering, and expander roll leading portion becomes the tapering 1:20 of circular cone cylindricality, swollen sub-tapering 1:40.
Embodiment tetra-: according to the specific embodiment of embodiment mono-or embodiment bis-, expander roll leading portion becomes the tapering 1:30 of circular cone cylindricality, swollen sub-tapering 1:60.
Claims (5)
1. a hydraulic power tube expander, by swollen son, swollen shell, positioning sleeve, holding screw, tube connector, thread bush, double-direction thrust ball bearing, thrust axis bearing sleeve, internal and external threads cover, lining, check ring, round nut, axle sleeve, expander roll, clamp nut, axle, nipple, ring flange, foreground gripper shoe, upper connecting rod, right connecting rod, left connecting rod, bearing holder (housing, cover), front single-row ball-bearing, middle single-row ball-bearing, rear single-row ball-bearing, flat key, right pull bar, left lever, hydraulic motor, hex nut, connecting plate, background support plate, hydraulic cylinder, centring ring, rear shaft seal, front shaft seal, handle, limiting plate, left gusset, right web plate, bearing pin, split pin forms, a swollen son of corresponding installation in each swollen shell groove of swollen shell, it is characterized in that swollen son becomes circular cone cylindricality, the number of swollen son is 3 or 4, swollen shell groove distributes at the leading portion isogonism of swollen shell, large outer little angle in 12 °～15 ° one-tenth of both sides, cross section inclination of swollen shell groove, longitudinally both sides tapering is identical with swollen sub-tapering, the axis of swollen shell groove and swollen shell is without inclination angle, expander roll inserts in swollen shell cylinder, the taper direction of expander roll is contrary with the taper direction of swollen son, and expander roll tapering is 2 times of swollen sub-tapering, foreground gripper shoe, background support plate, with double headed roller step, step small end is the upper connecting rod of screw thread, right connecting rod, and left connecting rod is connected and fixed composition framework with hex nut, tube expander is arranged in the gripper shoe of framework foreground, hydraulic motor is arranged in framework, and hydraulic cylinder is fixed on background support plate, and the suspender of lifting tube expander is connected on connecting rod, expander roll front end is cone, middle part is cylinder, rear end is taper shank, the taper shank of expander roll rear end is inserted in the taper hole of axle, by clamp nut, compressed, the small end of axle taper hole has square hole for exiting expander roll, between axle and ring flange, there is front axle to be sealed envelope, axle by inner hole sleeve on the output shaft of hydraulic motor, the outer ring of axle is loaded on front single-row ball-bearing, middle single-row ball-bearing and rear single-row ball-bearing inner ring, the outer ring of single-row ball-bearing is arranged in bearing holder (housing, cover), by centring ring axial location, between axle and bearing holder (housing, cover), there is rear shaft seal sealing, bearing holder (housing, cover) is connected and fixed by bolt and nut and hydraulic motor, the piston rod head of hydraulic cylinder is through the hole on background support plate, and connecting plate is connected with piston rod by piston rod rod end screw thread, and compresses with hex nut, left lever is connected connecting plate by hex nut with right pull bar with bearing holder (housing, cover), bearing holder (housing, cover) is connected with hydraulic motor, hydraulic motor turns clockwise, and hydraulic motor drives axle and expander roll to rotate by the flat key on output shaft, hydraulic cylinder is fixed on background support plate by hex bolts and nut, and the piston rod head of hydraulic cylinder is through the hole on background support plate, and connecting plate is connected with piston rod by piston rod rod end screw thread, and compresses with hex nut, left lever and right pull bar double headed roller step, step small end is screw thread, by hex nut, connecting plate is connected with bearing holder (housing, cover), swollen shell and internal and external threads cover are threaded connection, and internal and external threads cover is arranged on the inner ring of double-direction thrust ball bearing, by lining, is located, with round nut, fix, the outer ring of double-direction thrust ball bearing is arranged in thrust axis bearing sleeve, and by check ring axial location, thrust axis bearing sleeve is connected with sleeve thread, axle sleeve with nipple by being threaded, nipple with ring flange by being threaded, nipple and ring flange clamp foreground gripper shoe, and swollen shell is fixed on the inner ring of double-direction thrust ball bearing, positioning sleeve is fixed on tube connector by holding screw, tube connector is threaded with thread bush, thread bush is with thrust axis bearing sleeve by being threaded, and the end face of positioning sleeve is near tube sheet, and turn thread bush and thrust axis bearing sleeve can be adjusted the expanded joint position of swollen son in heat exchanger tube alone or in combination, on positioning sleeve, have handle notch, its both sides are welded with right web plate, left gusset, and handle, at right web plate, passes through between left gusset and handle notch, and bearing pin and split pin are by handle and right web plate and left link of boards, pull handle, limiting plate contacts with positioning sleeve, the end face of handle is parallel with heat exchanger tube outer wall, and leave gap, handle is pushed tube sheet to, and its end face blocks heat exchanger tube, avoids expanded joint starting stage heat exchanger tube to occur rotating or rocking, the end of positioning sleeve has symmetrical left and right observation panel, the situation of change of the mouth of pipe when observing expanded joint.
2. a kind of hydraulic power tube expander according to claim 1, is characterized in that swollen shell is taken in while establishing three swollen shell grooves, and three swollen shell grooves are mutually 120 ° in the distribution of circumference.
3. a kind of hydraulic power tube expander according to claim 1, while it is characterized in that, on swollen shell, four swollen shell grooves are set, four swollen shell grooves are in 90 ° mutually in the distribution of circumference.
4. a kind of hydraulic power tube expander according to claim 1, is characterized in that expander roll leading portion becomes the tapering 1:20 of circular cone cylindricality, swollen sub-tapering 1:40.
5. a kind of hydraulic power tube expander according to claim 1, is characterized in that expander roll leading portion becomes the tapering 1:30 of circular cone cylindricality, swollen sub-tapering 1:60.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420208654.9U CN203843029U (en) | 2014-04-28 | 2014-04-28 | Hydraulic power pipe expander |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420208654.9U CN203843029U (en) | 2014-04-28 | 2014-04-28 | Hydraulic power pipe expander |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203843029U true CN203843029U (en) | 2014-09-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420208654.9U Expired - Lifetime CN203843029U (en) | 2014-04-28 | 2014-04-28 | Hydraulic power pipe expander |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203843029U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104483069A (en) * | 2014-12-11 | 2015-04-01 | 亚普汽车部件股份有限公司 | Underwater detection air inlet leakage-preventing device of fuel oil tank |
| CN104772899A (en) * | 2015-03-27 | 2015-07-15 | 鹤山联塑实业发展有限公司 | Production apparatus for improving durability of steel plastic composite tube |
| CN105195570A (en) * | 2015-09-07 | 2015-12-30 | 武汉重工铸锻有限责任公司 | Rolling seal tool for seal cover of oil orifice of high-speed diesel engine and sealing method adopting rolling seal tool |
| CN106216536A (en) * | 2016-10-10 | 2016-12-14 | 无锡东逸电液伺服技术有限公司 | Electric tube expander |
| CN111515308A (en) * | 2020-06-02 | 2020-08-11 | 四川航勰汽车空调有限公司 | Expanded joint processing device for aluminum pipe of automobile air conditioner |
| CN111618190A (en) * | 2019-02-27 | 2020-09-04 | 杉野机械股份有限公司 | Automatic pipe expanding equipment, automatic pipe expanding method and pipe expander replacing method |
| CN112958707A (en) * | 2021-02-05 | 2021-06-15 | 中山职业技术学院 | Tube expansion device |
| CN113751606A (en) * | 2021-11-05 | 2021-12-07 | 太原科技大学 | Continuous progressive diameter-expanding rounding device and method for thick-wall metal straight welded pipe |
-
2014
- 2014-04-28 CN CN201420208654.9U patent/CN203843029U/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104483069A (en) * | 2014-12-11 | 2015-04-01 | 亚普汽车部件股份有限公司 | Underwater detection air inlet leakage-preventing device of fuel oil tank |
| CN104772899A (en) * | 2015-03-27 | 2015-07-15 | 鹤山联塑实业发展有限公司 | Production apparatus for improving durability of steel plastic composite tube |
| CN105195570A (en) * | 2015-09-07 | 2015-12-30 | 武汉重工铸锻有限责任公司 | Rolling seal tool for seal cover of oil orifice of high-speed diesel engine and sealing method adopting rolling seal tool |
| CN106216536A (en) * | 2016-10-10 | 2016-12-14 | 无锡东逸电液伺服技术有限公司 | Electric tube expander |
| CN106216536B (en) * | 2016-10-10 | 2018-01-12 | 无锡东逸电液伺服技术有限公司 | Electric tube expander |
| CN111618190A (en) * | 2019-02-27 | 2020-09-04 | 杉野机械股份有限公司 | Automatic pipe expanding equipment, automatic pipe expanding method and pipe expander replacing method |
| CN111618190B (en) * | 2019-02-27 | 2022-04-19 | 杉野机械股份有限公司 | Automatic pipe expanding equipment, automatic pipe expanding method and pipe expander replacing method |
| CN111515308A (en) * | 2020-06-02 | 2020-08-11 | 四川航勰汽车空调有限公司 | Expanded joint processing device for aluminum pipe of automobile air conditioner |
| CN111515308B (en) * | 2020-06-02 | 2022-03-15 | 四川航勰汽车空调有限公司 | Expanded joint processing device for aluminum pipe of automobile air conditioner |
| CN112958707A (en) * | 2021-02-05 | 2021-06-15 | 中山职业技术学院 | Tube expansion device |
| CN112958707B (en) * | 2021-02-05 | 2022-07-12 | 中山职业技术学院 | Tube expansion device |
| CN113751606A (en) * | 2021-11-05 | 2021-12-07 | 太原科技大学 | Continuous progressive diameter-expanding rounding device and method for thick-wall metal straight welded pipe |
| CN113751606B (en) * | 2021-11-05 | 2022-01-14 | 太原科技大学 | Continuous progressive diameter-expanding rounding device and method for thick-wall metal straight welded pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140924 |
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| CX01 | Expiry of patent term |