CN104368708B - A kind of straight swollen sub-tube expander - Google Patents
A kind of straight swollen sub-tube expander Download PDFInfo
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- CN104368708B CN104368708B CN201410372208.6A CN201410372208A CN104368708B CN 104368708 B CN104368708 B CN 104368708B CN 201410372208 A CN201410372208 A CN 201410372208A CN 104368708 B CN104368708 B CN 104368708B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/08—Tube expanders
- B21D39/20—Tube expanders with mandrels, e.g. expandable
- B21D39/203—Tube expanders with mandrels, e.g. expandable expandable by fluid or elastic material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
- B21D53/08—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of both metal tubes and sheet metal
Abstract
A kind of straight swollen sub-tube expander, is made up of with automatic control system expanded-connecting apparatus, it is characterized in that the swollen shell fluted shaft line of tube expander is parallel with swollen columella line, and the surface that the swollen son in swollen shell groove adjoins heat exchanger tube inwall is parallel with inside pipe wall, and the circumscribed circle diameter of swollen son is equal；Three phase mains is powered to hydraulic pump motor by electric control box and drives hydraulic pump to rotate, the hydraulic oil that hydraulic pump is discharged divides two-way, lead up to hydraulic cylinder stacked compression release valve, Pressure gauge before cross valve, solenoid operated four-way valve is to hydraulic cylinder, the most manually adjustable pressure and temp recuperation valve is in order to regulate the flow and pressure entering hydraulic cylinder cylinder end, control the fltting speed of hydraulic cylinder piston rod, i.e. control the fltting speed of expander roll, hydraulic motor stacked compression release valve of separately leading up to regulates the hydraulic fluid flow rate and pressure needed to hydraulic motor and by Pressure gauge display pressure before two-port valve, hydraulic motor is entered through electromagnetism two-port valve, expander roll is made to rotate by hydraulic motor.
Description
Technical field
The present invention relates to the tube expander of the heat-exchange apparatus that a kind of machine industry uses.
Background technology
Shell-and-tube heat exchanger is the heat transmission equipment that all trades and professions commonly use, and ensures sealing property and the intensity of tube-to-tubesheet joint frequently with expanded joint, and expanded joint pattern mainly has Hydraulic Expansion and mechanical expansion two kinds.
Hydraulic Expansion is that highly pressurised liquid is passed through swollen head, and swollen head directly contacts with by tube expansion inner surface and transmits pressure and makes tube wall expanded radially reach expanded joint purpose, and Hydraulic Expansion main marsupial bellows, O formula and the swollen feeling of fullness in the head of rubber type connect；The expanded joint quality of Hydraulic Expansion is higher with precision, but Hydraulic Expansion puts into height, and equipment is complicated, and service working time is long, it is adaptable to typical products in mass production and the expanded joint of thick-walled pipe.
Mechanical expansion can be divided into electronic expanded joint and manual expanded joint according to the difference of driving force, and mechanical expanding mode maneuverability is easy to operate, is used for light-wall pipe and small lot multi-assortment production, is the most the most frequently used a kind of expanded joint mode.Conventional mechanical expansion either motorized motions or hand drive, only provide the rotary power of tube expander expander roll, for making expander roll axially advance, swollen shell groove and swollen columella line are made an inclination angle, the swollen son in swollen shell is made to intersect with expander roll solid, expander roll drives swollen sub-reversion when rotating, swollen sub-promotion expander roll produces axial force and realizes expander roll and automatically advance.But the existence at this inclination angle makes the expanded joint position of table in heat exchanger tube form tapering and curved surface, cause that inner end owes swollen, outer end is the most swollen, affect the service life of heat exchanger, next mechanical expanding inefficient.
Elevated pressures can be born owing to the expanded joint of heat exchanger tube connects, it is particularly suitable for again the poor material of welding performance and welding job amount can be reduced and be used widely, therefore efficiently, high-quality expanded joint technology becomes the emphasis research topic in heat exchanger in development.
It has been investigated that, the straight swollen sub-tube expander that swollen shell groove is parallel with swollen columella line, the swollen sub-surface adjoining heat exchanger tube inwall is parallel with inside pipe wall, and the circumscribed circle diameter of swollen son is equal, can avoid producing the expanded joint defect that usual mechanical expansion causes.
Summary of the invention
Present invention aim to address the deficiency that existing machinery expanded joint exists, thering is provided a kind of straight swollen sub-tube expander, hydraulic system provide power, the rotation of expander roll and axially-movable realize automatically controlling, avoid heat exchanger tube expanded joint position to occur owing swollen and crossing swollen defect, improve expanded joint quality and the efficiency of heat exchanger tube.
nullTechnical scheme is made up of with automatic control system expanded-connecting apparatus，Expanded-connecting apparatus is by swollen son、Swollen shell、Positioning sleeve、Holding screw、Tube-shaped joint、Thread bush、Double-direction thrust ball bearing、Thrust axis bearing sleeve、Hollow shaft sleeve、Little axle sleeve、Check ring、Interior round nut、Outer round nut、Axle sleeve、Expander roll、Clamp nut、Mandrel、Nipple、Front axle seals、Ring flange、Foreground gripper shoe、Upper connecting rod、Rear shaft seal、Bearing block、Angle of lead contact ball bearing、Flat key、Centring ring、Hydraulic motor、Rod end nut、Connecting plate、Background support plate、Hydraulic cylinder、Left lever、Right pull bar、Handle、Limiting plate、Gusset、Bearing pin、Split pin、Left connecting rod、Right connecting rod、Rearmounted angular contact ball bearing、Angular contact ball bearing、Swollen shell groove、Connecting plate pilot hole、Positioning sleeve end face、Background support plate centre bore、Piston rod、Hydraulic motor output shaft、Mandrel endoporus、Mandrel outer ring、Mandrel radial hole、Mandrel taper hole、Expander roll taper shank、Screw slots、Handle end face、Handle notch、Left observation panel、Right observation panel is constituted；The foreground gripper shoe of expanded-connecting apparatus, background support plate, upper connecting rod, left connecting rod, right connecting rod composition triangular framing, wherein go up connecting rod, left connecting rod, right connecting rod are equivalently-sized cylindrical rod, double headed roller step, step small end is screw thread；Hydraulic motor is placed in framework, is connected fixing with bearing block with bolt；Left lever, right pull bar are cylindrical rod, and two ends have step, step small end to be screw thread, and left lever, the front end of right pull bar are connected fixing with the male flange of bearing block；Left lever, the rear end of right pull bar are connected fixing with connecting plate；Right connecting rod is through in the pilot hole of connecting plate, prevents hydraulic motor from swinging, but can be in axial sliding；Hydraulic cylinder is fixed by bolts on background support plate, hydraulic cylinder piston rod is threadeded through background support plate centre bore with connecting plate, and rod end nut compresses, by connecting plate when piston rod moves, right pull bar, left lever drive bearing block and hydraulic motor to move axially；Mandrel is one end band cylindrical bore, one end band cone-shaped inner hole, and surface has the cylinder of step, the cylindrical bore of mandrel one end to coordinate with the output shaft of hydraulic motor, transmit moment of torsion by flat key；The outer ring of mandrel is loaded on angle of lead contact ball bearing, rearmounted angular contact ball bearing and angular contact ball bearing inner ring, the outer ring of angle of lead contact ball bearing, rearmounted angular contact ball bearing and angular contact ball bearing is arranged in bearing block, axially being positioned by centring ring, axial seal made by rear shaft seal；The front end of mandrel is supported by ring flange, and front axle envelope makees axial seal；Ring flange is threaded connection with nipple, and foreground gripper shoe is clamped therebetween, and formation is rigidly connected；The dilator of expanded-connecting apparatus is placed in the front end of triangle-frame, its axle sleeve is threadeded with nipple, thrust axis bearing sleeve and sleeve thread connect and compose a cylinder stent to support dilator: thread bush, tube-shaped joint and positioning sleeve are placed in cylinder stent front end in turn, the most threaded；Positioning sleeve, by lax fixing in holding screw screw slots on tube-shaped joint, can rotate；Double-direction thrust ball bearing is loaded in thrust axis bearing sleeve, check ring axially position；Hollow shaft sleeve is big end band female thread, and the externally threaded hollow circular cylinder of small end band, hollow shaft sleeve is loaded on the inner ring of double-direction thrust ball bearing, little axle sleeve position, inner circle nut, cylindrical nut locking；The holding greatly of swollen shell is connected fixing with the female thread of hollow shaft sleeve, and expander roll passes swollen shell and hollow shaft sleeve, and its taper shank is connected with the bellmouth of mandrel one end and is compressed by clamp nut, to transmit the moment of torsion and reciprocating axial force making expander roll rotate；The radial hole of mandrel is for dismantling expander roll from mandrel；Swollen son is placed in swollen shell groove；During expanded joint, expander roll rotates, and swollen son rolls along inside pipe wall, promotes swollen shell to rotate together with the inner ring of double-direction thrust ball bearing, and direction of rotation is identical with expander roll, makes heat exchanger tube complete circumference expanded joint, and the expanded joint position of swollen rear heat exchanger tube is the face of cylinder, and surface is uniform, smooth；The front end of positioning sleeve has left observation panel, right observation panel and handle notch, the most left observation panel and right observation panel are in order to observe the heat exchanger tube head state after expanded joint, handle notch both sides are welded with gusset, equipped with handle in the middle of gusset, handle is fixed on gusset by bearing pin, split pin, and handle can rotate around bearing pin；Binding lever before expanded joint, limiting plate thereon contacts with the outer rim of positioning sleeve, and handle end face is just fitted with outside heat exchanger tube pipe end, it is simple to tube end inserts positioning sleeve smoothly；Front pushed to by expanded joint starting stage handle, and handle end face is by tube end clamping, it is to avoid heat exchanger tube rotates or moves axially and affect expanded joint quality；Handle and connection member thereof can rotate with the rotation of positioning sleeve, to adapt to the operation requirement of different angles；Automatic control system is by Hydraulic Station fuel tank, overflow valve, hydraulic pump, Pressure gauge, hydraulic pump motor, electric appliance control box, coupling coil, load switch, three phase mains, rectifier transformer, on and off switch, hydraulic cylinder master switch, hydraulic motor controls switch, first relay, time-delay relay, second relay, pressure switch, Pressure gauge before cross valve, solenoid operated four-way valve, Pressure gauge before two-port valve, electromagnetism two-port valve, hydraulic motor stacked compression release valve, manually adjustable pressure and temp recuperation valve, hydraulic cylinder stacked compression release valve, monitor, monitor Pressure gauge, emergency button, load cell is constituted；It is characterized in that the swollen shell fluted shaft line of tube expander is parallel with swollen columella line, the surface that the swollen son in swollen shell groove adjoins heat exchanger tube inwall is parallel with inside pipe wall, and the circumscribed circle diameter of swollen son is equal；Electric control box places the starting device of hydraulic pump motor, three phase mains is powered to hydraulic pump motor by electric control box and drives hydraulic pump to rotate, the import of hydraulic pump connects Hydraulic Station fuel tank, and the rate of discharge of overflow valve regulation hydraulic pump and pressure also have Pressure gauge to show the outlet pressure of hydraulic pump；The hydraulic oil that hydraulic pump is discharged divides two-way, lead up to hydraulic cylinder stacked compression release valve, Pressure gauge before cross valve, solenoid operated four-way valve is to hydraulic cylinder, the hydraulic cylinder stacked compression release valve regulation hydraulic fluid flow rate of hydraulic cylinder and pressure Pressure gauge display pressure before having cross valve, the most manually adjustable pressure and temp recuperation valve is in order to regulate the flow and pressure entering hydraulic cylinder cylinder end, control the fltting speed of hydraulic cylinder piston rod, i.e. control the fltting speed of expander roll, and after manually adjustable pressure and temp recuperation valve, connect pressure switch, monitor Pressure gauge and monitor, for recording operation cycle and the pressure of tube expansion each time；Hydraulic motor stacked compression release valve of separately leading up to regulates the hydraulic fluid flow rate and pressure needed to hydraulic motor and by Pressure gauge display pressure before two-port valve, enters hydraulic motor through electromagnetism two-port valve, hydraulic motor makes expander roll rotate.
The outstanding feature of the present invention is that tube expander is provided power can realize automatically controlling by hydraulic system, and the expander roll of tube expander is connected with hydraulic motor by mandrel, and hydraulic motor makes expander roll rotate, and Hydraulic Cylinder hydraulic motor realizes the axially-movable of expander roll；The swollen shell groove of tube expander is parallel with swollen columella line; the swollen sub-surface adjoining heat exchanger tube inwall is parallel with inside pipe wall; and the circumscribed circle diameter of swollen son is equal; heat exchanger tube expanded joint position inwall is smooth, cylindrical peripheral surface; avoid the deficient swollen and swollen defect excessively that usual mechanical expansion occurs that at expanded joint position tapering and curved surface etc. are irregularly shaped and cause; and current value and the force value of hydraulic cylinder propelling of hydraulic pump motor can be set according to the change of expander roll moment of torsion during expanded joint; control and record expanded joint cycle and pressure, improve expanded joint quality and efficiency.
Accompanying drawing explanation
Fig. 1 is the schematic front view of a kind of straight swollen sub-tube expander structure；
Fig. 2 is the D-D sectional view of Fig. 1；
Fig. 3 is the A-A sectional view of Fig. 1；
Fig. 4 is the B-B sectional view of Fig. 1；
Fig. 5 is the C-C sectional view of Fig. 1；
Fig. 6 is the K direction view of Fig. 1；
Fig. 7 is swollen shell part schematic front view；
Fig. 8 is the top view of Fig. 7；
Fig. 9 is the F-F sectional view of Fig. 1；
Figure 10 is the assembling relationship figure of mandrel and expander roll；
Figure 11 is the H direction view of Figure 10；
Figure 12 is automatic control system schematic diagram.
Detailed description of the invention
Embodiment one:
A kind of straight swollen sub-tube expander (seeing accompanying drawing) is made up of expanded-connecting apparatus and automatic control system.nullExpanded-connecting apparatus is by swollen sub 1、Swollen shell 2、Positioning sleeve 3、Holding screw 4、Tube-shaped joint 5、Thread bush 6、Double-direction thrust ball bearing 7、Thrust axis bearing sleeve 8、Hollow shaft sleeve 9、Little axle sleeve 10、Check ring 11、Interior round nut 12、Outer round nut 13、Axle sleeve 14、Expander roll 15、Clamp nut 16、Mandrel 17、Nipple 18、Front axle envelope 19、Ring flange 20、Foreground gripper shoe 21、Upper connecting rod 22、Rear shaft seal 23、Bearing block 24、Angle of lead contact ball bearing 25、Flat key 26、Centring ring 27、Hydraulic motor 28、Rod end nut 29、Connecting plate 30、Background support plate 31、Hydraulic cylinder 32、Left lever 33、Right pull bar 34、Handle 35、Limiting plate 36、Gusset 37、Bearing pin 38、Split pin 39、Left connecting rod 40、Right connecting rod 41、Rearmounted angular contact ball bearing 42、Angular contact ball bearing 43、Swollen shell groove 44、Connecting plate pilot hole 45、Positioning sleeve end face 46、Background support plate centre bore 47、Piston rod 48、Hydraulic motor output shaft 49、Mandrel endoporus 50、Mandrel outer ring 51、Mandrel radial hole 52、Mandrel taper hole 53、Expander roll taper shank 54、Screw slots 55、Handle end face 56、Handle notch 57、Left observation panel 58、Right observation panel 59 is constituted；Automatic control system is by Hydraulic Station fuel tank 60, overflow valve 61, hydraulic pump 62, Pressure gauge 63, hydraulic pump motor 64, electric appliance control box 65, coupling coil 66, load switch 67, three phase mains 68, rectifier transformer 69, on and off switch 70, hydraulic cylinder master switch 71, hydraulic motor controls switch 72, first relay 73, time-delay relay 74, second relay 75, pressure switch 76, Pressure gauge 77 before cross valve, solenoid operated four-way valve 78, Pressure gauge 79 before two-port valve, electromagnetism two-port valve 80, hydraulic motor stacked compression release valve 81, manually adjustable pressure and temp recuperation valve 82, hydraulic cylinder stacked compression release valve 83, monitor 84, monitor Pressure gauge 85, emergency button 86, load cell 87 is constituted.
The foreground gripper shoe 21 of expanded-connecting apparatus, background support plate 31, upper connecting rod 22, left connecting rod 40, right connecting rod 41 form triangular framing, wherein go up connecting rod 22, left connecting rod 40, right connecting rod 41 are equivalently-sized cylindrical rod, and double headed roller step, step small end is screw thread.
Hydraulic motor 28 is placed in triangular framing, is connected fixing with bearing block 24 with bolt.
Left lever 33, right pull bar 34 are cylindrical rod, and two ends have step, step small end to be screw thread, and left lever 33, the front end of right pull bar 34 are connected fixing with the male flange of bearing block 24.
Left lever 33, the rear end of right pull bar 34 are connected fixing with connecting plate 30.Right connecting rod 41 is through in the connecting plate pilot hole 45 of connecting plate 30, prevents hydraulic motor 28 from swinging, but can be in axial sliding.
Hydraulic cylinder 32 is fixed by bolts on background support plate 31, hydraulic cylinder piston rod 48 is threadeded through background support plate centre bore 47 with connecting plate 30, and rod end nut 29 compresses, by connecting plate 30 when piston rod 48 moves, left lever 33, right pull bar 34 drive bearing block 24 and hydraulic motor 28 to move axially.
Mandrel 17 is two ends band endoporus, and there is stepped cylindrical body on surface, and the cylindrical type spindle endoporus 50 of mandrel 17 one end inserts the hydraulic motor output shaft 49 of hydraulic motor, transmits moment of torsion by flat key 26.
The mandrel outer ring 51 of mandrel 17 is loaded on angle of lead contact ball bearing 25, rearmounted angular contact ball bearing 42 and angular contact ball bearing 43 inner ring, and the outer ring of angle of lead contact ball bearing 25, rearmounted angular contact ball bearing 42 and angular contact ball bearing 43 is arranged in bearing block 24, axially being positioned by centring ring 27, axial seal made by rear shaft seal 23.The front end of mandrel 17 is supported by ring flange 20, and front axle envelope 19 makees axial seal.Ring flange 20 is threaded connection with nipple 18, and clamps therebetween by foreground gripper shoe 21, and formation is rigidly connected.
The dilator of expanded-connecting apparatus is placed in the front end of triangular framing, its axle sleeve 14 is threadeded with nipple 18, thrust axis bearing sleeve 8 threadeds one cylinder stent of composition to support dilator with axle sleeve 14: thread bush 6, tube-shaped joint 5 are placed in cylinder stent front end in turn with positioning sleeve 3, the most threaded.
Positioning sleeve 3, by lax fixing in the holding screw 4 screw slots 55 on tube-shaped joint 5, can rotate.Double-direction thrust ball bearing 7 is loaded in thrust axis bearing sleeve 8, check ring 11 axially position.
Hollow shaft sleeve 9 is big end band female thread, and the externally threaded hollow circular cylinder of small end band, hollow shaft sleeve 9 is loaded on the inner ring of double-direction thrust ball bearing 7, little axle sleeve 10 position, and interior round nut 12 screws, and outer round nut 13 locks.
The holding greatly of swollen shell 2 is connected fixing with the female thread of hollow shaft sleeve 9, expander roll 15 is through swollen shell 2 and hollow shaft sleeve 9, its expander roll taper shank 54 is connected with the mandrel taper hole 53 of mandrel 17 one end and is compressed by clamp nut 16, to transmit the moment of torsion and reciprocating axial force making expander roll 15 rotate.
The mandrel radial hole 52 of mandrel 17 is for dismantling expander roll from mandrel.Swollen shell groove 44 on swollen shell 2, its axis is parallel with the axis of swollen shell 2, and swollen sub 1 is placed in swollen shell groove 44, adjoin heat exchanger tube inwall swollen sub 1 surface parallel with heat exchanger tube inwall, and the expanded joint position circumscribed circle diameter of swollen sub 1 is equal.
During expanded joint, expander roll 15 rotates, and swollen sub 1 rolls along inside pipe wall, promotes swollen shell 2 to rotate together with the inner ring of double-direction thrust ball bearing 7, direction of rotation is identical with expander roll 15, making heat exchanger tube complete circumference expanded joint, after expanded joint, the expanded joint position of heat exchanger tube is the face of cylinder, and surface is uniform, smooth.
The front end of positioning sleeve 3 has left observation panel 58, right observation panel 59 and handle notch 57, the most left observation panel 58 and right observation panel 59 are in order to observe the heat exchanger tube head state after expanded joint, handle notch 57 both sides are welded with gusset 37, equipped with handle 35 in the middle of gusset, handle 35 is fixed on gusset 37 by bearing pin 38, split pin 39, and handle 35 can rotate around bearing pin 38.
Binding lever 35 before expanded joint, limiting plate 36 thereon contacts with the outer rim of positioning sleeve 3, and handle end face 56 is just fitted with outside heat exchanger tube pipe end, it is simple to tube end inserts positioning sleeve smoothly.
Front pushed to by expanded joint starting stage handle, and handle end face 56 is by tube end clamping, it is to avoid heat exchanger tube rotates or moves axially and affect expanded joint quality.
Handle 35 and connection parts thereof can rotate with the rotation of positioning sleeve 3, to adapt to the operation requirement of different angles.
Electric control box 65 places the starting device of hydraulic pump motor 64, three phase mains 68 is powered to hydraulic pump motor 64 by electric control box 65 and is driven hydraulic pump 62 to rotate, the import of hydraulic pump 62 connects Hydraulic Station fuel tank 60, and overflow valve 61 regulates the rate of discharge of hydraulic pump and pressure and has Pressure gauge 63 to show the outlet pressure of hydraulic pump 62.
The hydraulic oil that hydraulic pump 62 is discharged divides two-way, lead up to hydraulic cylinder stacked compression release valve 83, cross valve Pressure gauge 77, solenoid operated four-way valve 78 to hydraulic cylinder 32, before hydraulic cylinder stacked compression release valve 83 regulates the hydraulic fluid flow rate of hydraulic cylinder 32 and pressure and has cross valve, Pressure gauge 77 shows pressure, the most manually adjustable pressure and temp recuperation valve 82 is in order to regulate the flow and pressure entering hydraulic cylinder 32 cylinder end, control the fltting speed of hydraulic cylinder piston rod 48, i.e. control the fltting speed of expander roll 15, and after valve, connect pressure switch 76, monitor Pressure gauge 85 and monitor 84, for recording operation cycle and the pressure of tube expansion each time.
Hydraulic motor stacked compression release valve 81 of separately leading up to regulates the hydraulic fluid flow rate and pressure needed to hydraulic motor 28 and shows pressure by Pressure gauge 79 before two-port valve, enters hydraulic motor 28 through electromagnetism two-port valve 80.
Solenoid operated four-way valve 78 is operated by coil electricity, if all power-off of two end-coils, solenoid operated four-way valve 78 is in middle neutral gear position, the oil-feed oil circuit of solenoid operated four-way valve 78 is inaccessible, the cylinder end of hydraulic cylinder 32 and rod end oil circuit are also turned on return line, flow to Hydraulic Station fuel tank 60, and now hydraulic cylinder 32 is in quick condition, piston rod 48 can move under external force, i.e. expander roll 15 can move.
Same electromagnetism two-port valve is operated by coil electricity, if coil blackout, the oil circuit of electromagnetism two-port valve is inaccessible, and hydraulic motor 28 stops the rotation.
Connecting three phase mains 68, open hydraulic pump motor 64, start hydraulic pump 62, hydraulic system provides hydraulic oil.
Three phase mains 68 picks out rectifier transformer 69 control system power supply is provided.
The hydraulic motor that closes controls switch 72, electromagnetism two-port valve 80 coil electricity, and oil circuit is connected, and hydraulic oil enters hydraulic motor 28 by hydraulic motor stacked compression release valve 81, electromagnetism two-port valve 80, and hydraulic motor can only one-directional rotation.
Power turn-on switch 70, control circuit is energized, electromagnetic valve cross valve 78 upper end coil electricity, and solenoid operated four-way valve 78 oil circuit is connected, and hydraulic cylinder 32 rod end oil-feed, piston rod 48 returns cylinder end.
Guan Bi hydraulic cylinder master switch 71, first relay 73 coil obtains electric, contact turns to that (normally-closed contact is opened, normally opened contact closes), solenoid operated four-way valve 78 upper end coil blackout, control system is by the normally opened contact of the first relay 73 Guan Bi, 78 times end-coils of second relay 75 normally-closed contact and solenoid operated four-way valve constitute loop, solenoid operated four-way valve 78 commutates, hydraulic oil passes through hydraulic cylinder stacked compression release valve 83, solenoid operated four-way valve 78, manually adjustable pressure and temp recuperation valve 82 enters the cylinder end of hydraulic cylinder 32, piston rod 48 is made to advance, implement expanded joint, fltting speed by manually adjustable pressure and temp recuperation valve 82 regulating piston bar 48.
Disconnecting hydraulic cylinder master switch 71, the first relay 73, the second relay 75, time-delay relay 74 returns in situ.
Force value (i.e. setting the propelling pressure value of hydraulic cylinder 32 cylinder end) and the current value of load cell 87 of pressure switch 76 can be set, when hydraulic cylinder end pressure is more than setting value, and expander roll change in torque makes the current value of hydraulic pump motor stop expanded joint when exceeding setting value.The setting value of pressure and electric current can meet the pipe expansion ratio needs of correspondence.
nullWhen during expanded joint, the cylinder end of hydraulic cylinder 32 works under more than or equal to setting pressure, pressure switch 76 closes，Along with expanded joint advances the moment of torsion of expander roll 15 to be incremented by，The change of moment of torsion causes the curent change of hydraulic pump motor 64，When current value exceedes setting value，Coupling coil 66 action of load cell 87，Load switch 67 closes，Electric current constitutes loop，Second relay 75 and time-delay relay 74 are energized action，First the second relay 75 turns to，Normally-closed contact disconnects，Solenoid operated four-way valve 78 lower end coil blackout，Solenoid operated four-way valve 78 returns to middle position，The piston rod 48 of hydraulic cylinder 32 stops advancing，Then time-delay relay 74 terminates rear steering in time delay，Normally-closed contact disconnects，Normally opened contact closes，Make solenoid operated four-way valve 78 upper end coil electricity，The piston rod 48 of hydraulic cylinder 32 returns cylinder end，Monitor Pressure gauge 85 and monitor 84 record expanded joint cycle and the force value of a heat exchanger tube joint simultaneously.
When the cylinder end pressure of hydraulic cylinder 32 or the moment of torsion of expander roll 15 are less than setting value, load switch 67 or pressure switch 76 disconnect, control system parts return to initial position, if overflow valve 61 automatically opens up when hydraulic system pressure raises, and unnecessary hydraulic oil hydraulic return station fuel tank 60.
When hydraulic cylinder master switch 71 disconnects, control circuit and the first relay 73, the second relay 75 and time-delay relay 74 power-off, system recovery is to normal position.
If wishing when expanded joint interrupt the propelling of expander roll or exit, emergency button 86, solenoid operated four-way valve about 78 coil blackout can be cut off, the axially-movable of piston rod 48 locks immediately, i.e. expander roll 15 axially-movable stops, and re-closes emergency button 86, and piston rod 48 works on.
No matter piston rod 48 makees axially-movable, or terminates axially-movable, and hydraulic motor 28 still can rotate, i.e. expander roll 15 still can rotate, and only opening hydraulic motor control switch 72 could rotate by stop solution pressure motors 28.
Embodiment two:
According to the detailed description of the invention of embodiment one, according to expanded joint pipe diameter size, swollen sub 1 uses 4, and swollen shell 2 is offered four long hole shape swollen shell grooves.
Four long hole shape swollen shell grooves are the most in 90 °.
Claims (2)
- null1. a straight swollen sub-tube expander，It is made up of with automatic control system expanded-connecting apparatus，The foreground gripper shoe of expanded-connecting apparatus，Background support plate，Upper connecting rod，Left connecting rod、Right connecting rod connects into triangle-frame，Hydraulic motor and bearing block are fixed and are placed in triangle-frame，Left lever、The threaded one end of right pull bar is fixing with the male flange of bearing block respectively to be connected，Other end screw thread is fixing with connecting plate to be connected，Right connecting rod is through in the connecting plate pilot hole of connecting plate，Hydraulic cylinder is fixed by bolts on background support plate，Hydraulic cylinder piston rod is threadeded through background support plate centre bore with connecting plate，And rod end nut compresses，Mandrel is one end band cylindrical bore，Other end band cone-shaped inner hole，There is the cylinder of step on surface，The cylindrical mandrel endoporus of mandrel one end coordinates with hydraulic motor output shaft，Moment of torsion is transmitted by flat key，Mandrel outer ring is loaded on angle of lead contact ball bearing、Rearmounted angular contact ball bearing and angular contact ball bearing inner ring，Angle of lead contact ball bearing、The outer ring of rearmounted angular contact ball bearing and angular contact ball bearing is arranged in bearing block，Axially positioned by centring ring，Axial seal made by rear shaft seal，Ring flange endoporus is passed through in mandrel front end，Sealed by the front axle in ring flange and make axial seal，Ring flange is threaded connection with one end of nipple，And foreground gripper shoe is clamped therebetween，Formation is rigidly connected，The dilator of expanded-connecting apparatus is placed in the front portion of triangle-frame，Its axle sleeve one end external screw thread is connected with nipple female thread，Other end external screw thread is connected with thrust axis bearing sleeve female thread，Constitute a cylinder stent，Thread bush、Tube-shaped joint and positioning sleeve are sequentially placed into cylinder stent front end，Thread bush big end female thread is connected with thrust axis bearing sleeve external screw thread，Thread bush small end female thread is connected with tube-shaped joint external screw thread，Positioning sleeve is socketed with tube-shaped joint，And be fixed in the screw slots of tube-shaped joint by holding screw，Positioning sleeve can rotate；Double-direction thrust ball bearing is installed in thrust axis bearing sleeve, axially positioned by check ring, hollow shaft sleeve is big end band female thread, the externally threaded hollow circular cylinder of small end band, hollow shaft sleeve is loaded on double-direction thrust ball bearing inner ring, positioned by little axle sleeve, interior round nut fastens, cylindrical nut locking, swollen shell big end external screw thread is connected fixing with hollow shaft sleeve female thread, expander roll passes swollen shell and hollow shaft sleeve, expander roll taper shank is connected with the mandrel taper hole of mandrel one end and is compressed by clamp nut, it is placed in mandrel for dismantling the mandrel radial hole of expander roll, swollen son is placed in swollen shell groove, the front end of positioning sleeve has left observation panel, right observation panel and handle notch, handle notch both sides are welded with gusset, handle is by bearing pin, split pin is fixed on gusset, handle can rotate around bearing pin；Automatic control system is by Hydraulic Station fuel tank, overflow valve, hydraulic pump, Pressure gauge, hydraulic pump motor, electric appliance control box, coupling coil, load switch, three phase mains, rectifier transformer, on and off switch, hydraulic cylinder master switch, hydraulic motor controls switch, first relay, time-delay relay, second relay, pressure switch, Pressure gauge before cross valve, solenoid operated four-way valve, Pressure gauge before two-port valve, electromagnetism two-port valve, hydraulic motor stacked compression release valve, manually adjustable pressure and temp recuperation valve, hydraulic cylinder stacked compression release valve, monitor, monitor Pressure gauge, emergency button, load cell is constituted；It is characterized in that the swollen shell fluted shaft line of tube expander is parallel with swollen columella line, the surface that the swollen son in swollen shell groove adjoins heat exchanger tube inwall is parallel with inside pipe wall, and the circumscribed circle diameter of swollen son is equal；Electric control box places the starting device of hydraulic pump motor, three phase mains is powered to hydraulic pump motor by electric control box and drives hydraulic pump to rotate, the import of hydraulic pump connects Hydraulic Station fuel tank, and the rate of discharge of overflow valve regulation hydraulic pump and pressure also have Pressure gauge to show the outlet pressure of hydraulic pump；The hydraulic oil that hydraulic pump is discharged divides two-way, lead up to hydraulic cylinder stacked compression release valve, Pressure gauge before cross valve, solenoid operated four-way valve is to hydraulic cylinder, the hydraulic cylinder stacked compression release valve regulation hydraulic fluid flow rate of hydraulic cylinder and pressure Pressure gauge display pressure before having cross valve, the most manually adjustable pressure and temp recuperation valve is in order to regulate the flow and pressure entering hydraulic cylinder cylinder end, control the fltting speed of hydraulic cylinder piston rod, i.e. control the fltting speed of expander roll, and after manually adjustable pressure and temp recuperation valve, connect pressure switch, monitor Pressure gauge and monitor, for recording operation cycle and the pressure of tube expansion each time；Hydraulic motor stacked compression release valve of separately leading up to regulates the hydraulic fluid flow rate and pressure needed to hydraulic motor and by Pressure gauge display pressure before two-port valve, enters hydraulic motor through electromagnetism two-port valve, hydraulic motor makes expander roll rotate；Setting load cell current value and the force value of pressure switch, when hydraulic cylinder end pressure is more than setting value, and expander roll change in torque makes the current value of hydraulic pump motor stop expanded joint when exceeding setting value.
- The straight swollen sub-tube expander of one the most according to claim 1, is characterized in that swollen sub-employing 4, and swollen shell is offered four long hole shape swollen shell grooves；Four long hole shape swollen shell grooves are the most in 90 °.
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| CN201410372208.6A CN104368708B (en) | 2014-07-31 | 2014-07-31 | A kind of straight swollen sub-tube expander |
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| CN201410372208.6A CN104368708B (en) | 2014-07-31 | 2014-07-31 | A kind of straight swollen sub-tube expander |
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| CN104368708B true CN104368708B (en) | 2016-08-17 |
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| CN111545653A (en) * | 2020-06-30 | 2020-08-18 | 珠海格力智能装备有限公司 | Expansion rod structure and pipe expander with same |
| CN112958707B (en) * | 2021-02-05 | 2022-07-12 | 中山职业技术学院 | Tube expansion device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5650734A (en) * | 1979-10-01 | 1981-05-08 | Hitachi Ltd | Method and device for automatic operation of uniform pipe expanding apparatus |
| JPS5820331A (en) * | 1981-07-28 | 1983-02-05 | Isamu Tagami | Pipe expander |
| CN101480681B (en) * | 2008-01-10 | 2011-04-27 | 中山市奥美森工业有限公司 | Vertical type rod expanding arbor machine capable of automatically selecting expanding arbor row number |
| CN202052874U (en) * | 2011-03-24 | 2011-11-30 | 扬州诚德钢管有限公司 | Seamless steel pipe hot expanding machine |
| CN202701186U (en) * | 2012-06-19 | 2013-01-30 | 合肥兰博电力机具技术有限责任公司 | Tube expander with beads not prone to falling |
| CN202861230U (en) * | 2012-10-17 | 2013-04-10 | 南充市长远铝业有限公司 | Hydraulic pressure pipe-expanding machine |
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