CN203184463U - Rubber expanded connection machine - Google Patents
Rubber expanded connection machine Download PDFInfo
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- CN203184463U CN203184463U CN 201320128071 CN201320128071U CN203184463U CN 203184463 U CN203184463 U CN 203184463U CN 201320128071 CN201320128071 CN 201320128071 CN 201320128071 U CN201320128071 U CN 201320128071U CN 203184463 U CN203184463 U CN 203184463U
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Abstract
The utility model discloses a rubber expanded connection machine which comprises a hydraulic power system, a pressurizing working system and an electrical control system. The rubber expanded connection machine is characterized in that the pressurizing working system comprises an oil cylinder, a piston, a pulling rod, an elastic rubber body, a sealing ring and a back pressing ring, the oil cylinder and the piston are sealed through the sealing ring, one end of the pulling rod is connected with the piston, an expanded head is composed of the other end of the pulling rod, the elastic rubber body, the sealing ring and the back pressure ring, and the expanded head is connected with the wall of the oil cylinder through the back pressure ring. The rubber expanded connection machine is light in weight, low in cost, convenient to operate, high in expanded connection efficiency and capable of being connected with 4-6 tubes and tube sheets per minute in an expanded mode, economic benefits are remarkably improved, technical progress of the industry can be pushed, and large social benefits are generated.
Description
Technical field
The present invention relates to a kind of rubber tube expanding machine, belong to mechanical field.
Background technology
In the shell-and-tube heat exchanger manufacture process, the pipe-pipe sheet joint mainly adopts welding, expanded joint and expanded and welded tube joint in conjunction with, sticking expanding and connected mode such as be threaded, the position that these shell-and-tube device manufacturing process take place to lose efficacy mainly is pipe-pipe sheet jointing position, its quality has determined reliability and the service life of shell-and-tube heat exchanger, may cause the tremendous economic loss to industrial production.Therefore, the reliability of pipe-tube sheet jointing is that heat transmission equipment manufactures and designs middle major issue.
In the shell-and-tube heat exchanger manufacture process, the pipe-pipe sheet joint mainly adopts modes such as welding, expanded joint and expanded and welded tube joint combination to connect, and also adopts sticking expanding and connected mode such as be threaded during special circumstances.
The method that is welded to connect is simple, is widely used, and is not high to the processing request of pore, and joint bonding strength and good seal performance are applicable to the occasion that pull-off strength is big, tube plate thickness is little, serviceability temperature is high, butt joint compactness has strict demand.But, there is the gap between pipe-pipe sheet welding back pipe and the pore, easily cause crevice corrosion; The welding residual stress of joint may cause stress corrosion cracking; During the soldering stainless steel material, easily cause the material metallographic structure to change in the heat affected area, make corrosion resistance descend; The heat exchanger tube vibration of fluid induced may produce fatigue crack at the welding point place; When place under repair, heat exchanger tube is changed difficulty, and joint leaks the reliability that repair welding may have influence on adjacent joint, and is especially true under the pipe bridge spacing situation less than normal.
Expanded joint utilizes the difference of the elastic-plastic deformation that tube-to-tube sheet connection produces under external force, the two is closely linked and reaches the fastening purpose of sealing, has eliminated the gap between plate, the pipe, can prevent effectively that the shell side medium from infiltrating the crevice corrosion that causes.The expanded joint technology is divided into mechanical expanded joint, explosive expansion joint and static flexible expanded joint (containing Hydraulic expansion-jointing, liquid bag expanded joint and rubber expanded joint).
The pipe-pipe sheet joint bonding strength of machinery expanded joint is better, can bear certain axial force, thermal shock and cyclic loading.But there is following shortcoming in mechanical expanded joint: 1. each joint bonding strength and compactness are inhomogeneous.2. the pipe end stress corrosion inclination is obvious.3. the periodicity of roller rolls and makes the heat exchanger tube axial elongation, radially enlarges tube wall attenuate, cracking easily.4. the compatibility of tube-to-tube sheet connection material expanded joint has certain restriction, all is restricted as expanded joint of expanded joint, aluminum pipe and the carbon steel of titanium pipe and carbon steel etc.5. labor productivity is low, and the expanded joint of little caliber or thick-walled pipe pipe is difficult, repeats to mend to expand also to have difficulties.
Explosive expansion joint has higher bonding strength and reliable sealing, and it is simple to execute the process frock that expands, hundreds of pipes of expanded joint simultaneously, and the production efficiency height, labour intensity is low.But the difficult point of explosive expansion joint is the calculating of explosive charge, still needs solve by test method for the explosive expansion joint of pipe-pipe sheet.The explosive expansion joint joint quality is wayward, and expanded joint explosive charge moment finishes, and has certain danger; Instantaneous expanded joint pressure is very big, the time compole short, pipe breaks or cracks in may making; Under so big strain rate, the mechanical property of material is also different with static mechanical property, and there is certain difficulty in mechanical analysis.
Hydraulic expansion-jointing claims O shape circle tube expansion technique again, an O shape circle respectively is set at expand tube head two ends, between tube wall and expand tube head outer wall, form a very little closing gap, utilize water under high pressure (or oil) to apply interior pressure by the enclosure space exchange heat pipe that the centre bore of mandrel enters O shape circle, expand head and pipe form, heat exchanger tube enters elasticity, elastoplasticity and mecystasis successively, until being adjacent to tube sheet; Behind pipe internal pressure removal, if the tube sheet elastic recovery then can realize the pipe-pipe sheet expanded joint greater than the elastic recovery of heat exchanger tube.The Hydraulic expansion-jointing technology utilizes the direct heat exchanging inside pipe wall of fluid pressure to apply expanded joint pressure, can directly measure and accurately control; The extent of rebound size only depends on physical dimension and the material behavior of pipe, tube sheet, can calculate; Expanded joint length is not subjected to the restriction of the degree of depth and length, can be a bit larger tham tube plate thickness, thereby can eliminate the gap between the pipe-pipe sheet fully, realizes the omnidistance expanded joint of whole tube plate thickness; Loading and unloading is once finished, and operates easyly rapidly, and labour intensity is low, and an expanded joint time of expanding mouthful only needs several seconds; Each joint expanded joint pressure is even, steady quality, and the residual stress on heat exchanger tube surface is little.
But because expanded joint hydraulic coupling height, for guaranteeing positiver sealing, Hydraulic expansion-jointing requires the heat exchanger tube any surface finish, the dimensional accuracy height, and ovality is little.The general dimensional accuracy of heat exchanger tube that China produces is relatively poor, sometimes diameter deviation reach ± 0.5 mm, wall thickness deviation can reach ± 10%.Therefore, O shape circle expanded joint technology has difficulties when homemade heat exchanger tube is carried out expanded joint, has limited this technology applying in China.When equipment component is had relatively high expectations, employing is also arranged from external import heat exchanger tube, utilize this technology to carry out expanded joint.It is fragile that high expanded joint hydraulic coupling also causes in the expand tube process O shape circle to flow, and only be about 10 times its service life, needs often to change.In addition, the expand tube medium of leakage adds the lubricating oil in the pore, may pollute other pore, influences the expand tube quality.
Liquid pocket type expanded joint technology adopts elastic caoutchouc liquid bag to replace O shape circle to seal, the centre bore of highly pressurised liquid by mandrel enters in the liquid bag between mandrel and the heat exchanger tube inner surface, by the liquid bag pressure is passed to the inwall of heat exchanger tube, make heat exchanger tube generation elastic-plastic deformation, until realizing expanded joint.Liquid pocket type Hydraulic expansion-jointing has kept the series of advantages of O shape circle expand tube, and expanded joint pressure is even, and rubber liquid bag is isolated expand tube medium and heat exchanger tube, has avoided the pollution of line up in the expanded joint process.
But when bloated turnover heat exchanger tube, rubber liquid bag may wear and tear or be scratched, and breaks in the expand tube process; Because expanded joint pressure height, when liquid bag and inner layer pipe gap were big slightly, it is bad that the liquid bag is squeezed breakage easily; Because rubber has viscoplasticity, if liquid bag and heat exchanger tube gap are less, the liquid bag shape recovers slower behind the expand tube, and a turnover heat exchanger tube difficulty expands; The requirement of liquid bag expanded joint heat exchanging tube-surface quality and form tolerance than O shape circle expanded joint require low, but still higher; A radial and axial size that expands all can't be adjusted, and the head that expands can only be used for the tube sheet of a specification; If the liquid bag breaks, the bloated head that must more renew, utilization rate is low, the cost height; The following pipe-pipe sheet of general 50 mm of being fit to connects.
The rubber expanded joint be with soft rubber as the power transmission medium, thereby realize that pipe-pipe sheet joint expanded joint connects.During expanded joint, support ring abuts against on the tube sheet face, and the sealing ring close with it keeps inactive state, and the loading pull bar that connects together with oil cylinder piston moves right, and the sealing ring that drives tail end also moves right.Soft rubber is because axial compression and bulging radially forces tube-to-tube sheet connection to produce elastic-plastic deformation is finished the expanded joint of pipe-tube sheet joint.
Rubber expanding joint process residual stress is little, and pipe is not subjected to torsional interaction during expanded joint, the shock resistance that is conducive to restrain.The expanded joint pressure that the rubber expanded joint also has Hydraulic expansion-jointing and a liquid bag expanded joint evenly, steady quality, operation multiple advantages such as easy, labour intensity is low rapidly, and the allowable tolerance of ips and the element that matches can be greatly, the rubber element life-span is long, changes easily, can be used in big-inch pipe.But the rubber expanded joint also comes with some shortcomings: 1. expand tube pressure skewness vertically.Have friction between pore and sealing ring and the rubber, frictional force increases with the increase of expand tube pressure, causes the expand tube pressure that is applied on the pore inboard big at tube sheet, and outer less, the pipe expansibility is inhomogeneous vertically, and is particularly evident for thick tube sheet.2. the life-span of sealed at both ends circle and rubber elastomer differs greatly.The sealing ring of close support ring almost is in static, and the life-span is long, and the sealing ring of tail end moves axially in executing the process of expanding, and the life-span is short.As the soft rubber of expand tube media, because the difference of mobile distance, the degree of wear difference at two ends is also bigger.For tube wall coarse low precision pipe and the long occasion of expand tube section, above-mentioned situation is especially serious.3. can not realize the through thickness expanded joint.Because pipe radial dilatation and rubber axial compression, the soft rubber segment length shortens, and expanded joint length is the part of tube plate thickness, and the tube sheet inboard has long one section can not expand and close.
The utility model content
The purpose of this utility model provides a kind of expanded joint equipment that improves the pipe tube sheet of pipe-pipe sheet expanded joint Joint Reliability.
Another purpose of the present utility model provides the high expanded joint equipment of a kind of expanded joint efficient.
For achieving the above object, the utility model comprises following technical scheme:
Described rubber tube expanding machine is made of hydraulic power system, supercharging work system and electric control system.
Described hydraulic power system comprises high-pressure oil pump and motor; Described hydraulic power system adopts air switch control power supply to cut-off.
Described supercharging work system comprises oil cylinder, piston, pull bar, elastic rubbery body, sealing ring and back pressure ring, and oil cylinder and piston seal by sealing ring, and an end of pull bar is connected with piston, and the other end and elastic rubbery body, sealing ring and back pressure ring are formed the head that expands.Described bloated head comprises elastic rubbery body, sealing ring and back pressure ring, the two ends that elastic rubbery body is connected with pull bar respectively arrange a sealing ring, the head that expands is connected with cylinder wall by the back pressure ring, and the back pressure ring can prevent elastic rubbery body slippage from the pore of pipe in the expanded joint process.
Piston in the supercharging work system, cylinder wall etc. occupy suitable weight, need to select suitable structure and material, to realize lightness as far as possible.Preferably, described pull bar, piston are or/and cylinder shell is aluminium; Be more preferably the aviation aluminium; Described material has higher intensity and impact flexibility, service life〉5000 times (intensity expands).
Described electric control system is the PLC control system, be used for the startup of control pump, manually, automatically, parameters such as loading, discharge rate.
Described hydraulic power system is mainly complete equipment power is provided, be connected with an end of high-pressure oil pipe by assemblies such as pump, hydraulic valves, the other end of high-pressure oil pipe then is connected with the supercharging work system, power is transported in the supercharging work system oil cylinder, promote piston and move back and forth (being loading and unloading), the piston motion drives pull bar elastic rubbery body is carried out loading and unloading, realizes the expanded joint of tube-to-tube sheet connection.
Control system is then regulated and is controlled parameters such as hydraulic pressure, load mode, load time, expanded joint speed, dwell time, discharge times.
Preferably, described elastic rubbery body adopts the mould one-shot forming, is complementary with the pipe of every kind of specification, and surface, rubber cylinder inside and outside accurately cooperates with pull bar outer surface, tube wall.Described elastic rubbery body is convenient to dismounting, cutting and splicing, and combination can adapt to different calibers and tube plate thickness flexibly.
Expanded joint machine described in the utility model is in light weight, cost is low, easy to operate, expanded joint efficient height, per minute can 4～6 pipe-pipe sheets of expanded joint, significantly improve economic benefit, can promote technical progress of industry, produce bigger social benefit.
Description of drawings
1. pipe; 2. sealing ring; 3. tube sheet; 4. rubber bodies; 5. back pressure ring; 6. pull bar; 7. oil cylinder;
8. hydraulic system; 9. piston
The specific embodiment
By following examples the utility model is described in further details, following examples be to explanation of the present utility model and unrestricted, the utility model is not limited to following examples.
Described rubber tube expanding machine is made of hydraulic power system 8, supercharging work system and electric control system.
Described hydraulic power system comprises high-pressure oil pump and motor; Described hydraulic power system adopts air switch control power supply to cut-off.
Described supercharging work system comprises oil cylinder 7, piston 9, pull bar 6, elastic rubbery body 4, sealing ring 2 and back pressure ring 5.Oil cylinder 7 seals by sealing ring with piston 9, and an end of pull bar 6 is connected with piston 9, and the other end and elastic rubbery body 4, sealing ring 2 and back pressure ring 5 are formed the head that expands.Described bloated head comprises elastic rubbery body 4, sealing ring 2 and back pressure ring 5, the two ends that elastic rubbery body 4 is connected with pull bar 6 respectively arrange a sealing ring 2, the head that expands is connected by the wall of back pressure ring 5 with oil cylinder 7, and back pressure ring 5 can prevent elastic rubbery body 4 slippage from the pore of pipe 1 in the expanded joint process.
Preferably, described elastic rubbery body adopts the mould one-shot forming, is complementary with the pipe of every kind of specification, and surface, rubber cylinder inside and outside accurately cooperates with pull bar outer surface, tube wall.
Described electric control system is the PLC control system, be used for the startup of control pump, manually, automatically, parameters such as loading, discharge rate.
Described hydraulic power system is mainly complete equipment power is provided, be connected with an end of high-pressure oil pipe by assemblies such as pump, hydraulic valves, the other end of high-pressure oil pipe then is connected with the supercharging work system, power is transported in the supercharging work system oil cylinder, promote piston and move back and forth (being loading and unloading), the piston motion drives pull bar elastic rubbery body is carried out loading and unloading, realizes the expanded joint of pipe 1 and tube sheet 3.
Control system is then regulated and is controlled parameters such as hydraulic pressure, load mode, load time, expanded joint speed, dwell time, discharge times.
In second embodiment of the present utility model, the two ends that elastic rubbery body 4 is connected with pull bar 6 respectively arrange two sealing rings 2, and other structures are identical with previous embodiment.
In the 3rd embodiment of the present utility model, described pull bar, piston have higher intensity and impact flexibility, service life or/and cylinder shell is the aviation aluminium〉5000 times (intensity expands).The connection of other assemblies is identical with first embodiment.
In the 4th embodiment of the present utility model, the two ends that elastic rubbery body 4 is connected with pull bar 6 respectively arrange two sealing rings 2, described pull bar, piston have higher intensity and impact flexibility, service life or/and cylinder shell is novel aeronautical material〉5000 times (intensity expands).The connection of other assemblies is identical with first embodiment.
Claims (7)
1. rubber expanded joint machine, comprise hydraulic power system, supercharging work system and electric control system, it is characterized in that, described supercharging work system comprises oil cylinder, piston, pull bar, elastic rubbery body, sealing ring and back pressure ring, oil cylinder and piston seal by sealing ring, one end of pull bar is connected with piston, and the other end and elastic rubbery body, sealing ring and back pressure ring are formed the head that expands, and described bloated head is connected with cylinder wall by the back pressure ring.
2. rubber expanded joint machine according to claim 1 is characterized in that, described pull bar, piston are or/and cylinder shell is aluminium.
3. rubber expanded joint machine according to claim 2 is characterized in that, described aluminium service life〉5000 times.
4. according to each described rubber expanded joint machine of claim 1-3, it is characterized in that described elastic rubbery body adopts the mould one-shot forming.
5. according to each described rubber expanded joint machine of claim 1-3, it is characterized in that described hydraulic power system comprises high-pressure oil pump and motor.
6. rubber expanded joint machine according to claim 5 is characterized in that, described hydraulic power system adopts air switch control power supply to cut-off.
7. rubber expanded joint machine according to claim 1 is characterized in that, described electric control system is the PLC control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320128071 CN203184463U (en) | 2013-03-20 | 2013-03-20 | Rubber expanded connection machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320128071 CN203184463U (en) | 2013-03-20 | 2013-03-20 | Rubber expanded connection machine |
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| Publication Number | Publication Date |
|---|---|
| CN203184463U true CN203184463U (en) | 2013-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320128071 Expired - Lifetime CN203184463U (en) | 2013-03-20 | 2013-03-20 | Rubber expanded connection machine |
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| Country | Link |
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| CN (1) | CN203184463U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106935124A (en) * | 2015-12-30 | 2017-07-07 | 中核北方核燃料元件有限公司 | A kind of expanded joint test tool |
| CN107014430A (en) * | 2017-03-31 | 2017-08-04 | 中国特种设备检测研究院 | A kind of sealing property method of testing of Zr/Ti pipes tube sheet joint |
| CN107199283A (en) * | 2016-03-17 | 2017-09-26 | 本田技研工业株式会社 | Manufacturing process and its device |
| CN107262616A (en) * | 2017-07-13 | 2017-10-20 | 东方电气(广州)重型机器有限公司 | The exchanger tubes and tubesheets only swollen Joining Technology not welded is welded on Heat Exchanger of Nuclear Power Plant |
| CN109821956A (en) * | 2018-08-30 | 2019-05-31 | 浙江志伯电器科技有限公司 | A kind of manufacturing method of shaver shell |
| CN111618504A (en) * | 2020-06-08 | 2020-09-04 | 广州美亚股份有限公司 | Welding fixture |
| CN112264538A (en) * | 2020-10-16 | 2021-01-26 | 陈希 | Hydraulic pipe expander suitable for pipe fittings of different specifications |
| CN113531275A (en) * | 2021-08-12 | 2021-10-22 | 斯必高空气冷却技术(张家口)有限公司 | Process for repairing leaking pipe by adding liner pipe on site |
-
2013
- 2013-03-20 CN CN 201320128071 patent/CN203184463U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106935124A (en) * | 2015-12-30 | 2017-07-07 | 中核北方核燃料元件有限公司 | A kind of expanded joint test tool |
| CN107199283A (en) * | 2016-03-17 | 2017-09-26 | 本田技研工业株式会社 | Manufacturing process and its device |
| CN107014430A (en) * | 2017-03-31 | 2017-08-04 | 中国特种设备检测研究院 | A kind of sealing property method of testing of Zr/Ti pipes tube sheet joint |
| CN107262616A (en) * | 2017-07-13 | 2017-10-20 | 东方电气(广州)重型机器有限公司 | The exchanger tubes and tubesheets only swollen Joining Technology not welded is welded on Heat Exchanger of Nuclear Power Plant |
| CN109821956A (en) * | 2018-08-30 | 2019-05-31 | 浙江志伯电器科技有限公司 | A kind of manufacturing method of shaver shell |
| CN111618504A (en) * | 2020-06-08 | 2020-09-04 | 广州美亚股份有限公司 | Welding fixture |
| CN112264538A (en) * | 2020-10-16 | 2021-01-26 | 陈希 | Hydraulic pipe expander suitable for pipe fittings of different specifications |
| CN113531275A (en) * | 2021-08-12 | 2021-10-22 | 斯必高空气冷却技术(张家口)有限公司 | Process for repairing leaking pipe by adding liner pipe on site |
| CN113531275B (en) * | 2021-08-12 | 2023-03-03 | 斯必高空气冷却技术(张家口)有限公司 | Process for repairing leaking pipe by adding liner pipe on site |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130911 |