CN104492900B - A kind of totally-enclosed hydraulic pressure bimetal composite production technology of steel tube and device - Google Patents
A kind of totally-enclosed hydraulic pressure bimetal composite production technology of steel tube and device Download PDFInfo
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- CN104492900B CN104492900B CN201410655267.4A CN201410655267A CN104492900B CN 104492900 B CN104492900 B CN 104492900B CN 201410655267 A CN201410655267 A CN 201410655267A CN 104492900 B CN104492900 B CN 104492900B
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- 238000012360 testing method Methods 0.000 claims description 75
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 34
- 238000013329 compounding Methods 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 abstract description 5
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- 238000011084 recovery Methods 0.000 description 4
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- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
- 238000005381 potential energy Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
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Abstract
The present invention relates to a kind of totally-enclosed hydraulic pressure bimetal composite production technology of steel tube and device, which includes disengaging material unit, lifting hanger pipe unit, upper fixture device, lower grip device, left locking device, right locking device, left experiment head assembly, right experiment head assembly；Wherein, the upper fixture device, lower grip device, left locking device, right locking device clamping steel pipe, and steel pipe is totally-enclosed, base tube elastic deformation amount is controlled, makes the composite deformation of base tube and bushing pipe in the range of setting control；Left and right experiment head assembly is symmetrical arranged, and is pushed exhaust valve and the advance of experiment head by master cylinder therein or is retreated, completes recombination process.The present invention is provided with the full-closed structure outside steel pipe, and hydraulic pressure compound tense base tube bulging is made to be limited in the space of a relative stiffness, both ensure that the stickiness of composite bimetal pipe, in turn ensures original mechanical property of base tube and bushing pipe.
Description
Technical Field
The invention relates to the field of hydraulic composite metal pipes, in particular to a production process and a device of a fully-closed hydraulic composite bimetal steel pipe.
Background
At present, most of the bimetal composite pipes produced by the hydraulic bulging process adopt a hydraulic compounding mode, which is adopted by many manufacturers at home and abroad, and the close fit degree of the bimetal composite inner lining pipe and the outer base pipe can be realized by two processes of hydraulic expansion loading and unloading. Generally, a water pressure expanding bulging technology is utilized to theoretically calculate the relation between a limit deformation value and water pressure, the inner lining pipe and the outer base pipe are subjected to expansion deformation by controlling water pressure, the inner lining pipe is subjected to plastic deformation along with the increase of the pressure, the pipe diameter is expanded to be tightly attached to the inner wall of the base pipe, the pressure is continuously increased, the outer base pipe is subjected to elastic deformation, the water pressure is unloaded, the inner pipe and the outer pipe are subjected to elastic recovery simultaneously in the process of disappearance of the inner expansion pressure, compared with the whole deformation, the elastic recovery amount of the lining pipe is only a small part, after the elastic recovery is completed, the inner lining pipe basically maintains the deformed contour, because the deformation of the outer pipe is mainly elastic deformation, in the elastic recovery process, the outer base pipe can be supported by the inner lining pipe, part of elastic potential energy is reserved on the bimetal composite pipe, and the more the reserved elastic potential energy is, the higher the contact and adhesion tightness degree of the composite pipe is.
However, the prior art has the following disadvantages in the process of utilizing the hydraulic compounding process: 1. the water pressure is controllable, but the deformation of the base pipe is not controllable, and theoretical data and actual data are different; 2. the whole deformation of the steel pipe is uneven, and the bending phenomenon of a finished product is serious; 3. because the base pipe has certain difference in performance, local deformation and even blasting can often occur, and safety accidents occur. The non-uniform deformation has a certain effect on the safety of the composite pipe in use, and the residual stress and the non-uniform local stress complicate the stress situation of the composite pipe and make it unknown, which situation is extremely dangerous in some important situations.
In view of the above-mentioned drawbacks, the present inventors have finally obtained the present creation through a long period of research and practice.
Disclosure of Invention
The invention aims to provide a production process and a device of a fully-closed hydraulic composite bimetallic steel pipe, which are used for overcoming the technical defects.
In order to achieve the purpose, the invention provides a fully-closed hydraulic composite bimetal steel pipe production device which comprises a feeding and discharging unit, a lifting pipe hanging unit, an upper clamp device, a lower clamp device, a left locking device, a right locking device, a left test head assembly and a right test head assembly; wherein,
the upper clamp device, the lower clamp device, the left locking device and the right locking device clamp the steel pipe, the steel pipe is totally closed, and the elastic deformation of the base pipe is controlled, so that the composite deformation of the base pipe and the liner pipe is in a constant value control range;
the lifting pipe hanging unit is used for hanging the steel pipe, transversely moving and releasing the steel pipe to the lower clamp device; the left test head assembly and the right test head assembly are symmetrically arranged, and the exhaust valve body and the test head are pushed to advance or retreat by the main oil cylinder to complete the compounding process.
Furthermore, the upper clamp device comprises a lifting oil cylinder and an upper clamp which are integrally arranged on a beam of a cantilever; the tail end of a piston rod of the lifting oil cylinder is fixed with a connecting piece, and the connecting piece is fixed with the upper end of the upper clamp so that the lifting oil cylinder and the upper clamp move together.
Furthermore, the lower clamp device and the right locking device are arranged on an integral platform and can be integrally transversely moved; wherein, the lower clamp device comprises a lower clamp; the right locking device comprises a right locking oil cylinder and a right locking clamping tile, and the connecting end part of a piston rod of the right locking oil cylinder is fixedly connected with the right locking clamping tile;
the left locking device and the right locking device are symmetrically arranged and comprise a left locking oil cylinder and a left locking slip.
Further, left test head assembly include left support pedestal, left master cylinder, left drag hydro-cylinder, left exhaust valve body and left test head, wherein, left drag hydro-cylinder set up in pairs, respectively horizontal installation on left support pedestal, left master cylinder passes through the flange and the left exhaust valve body connection of piston rod front end, the right side at the exhaust valve body is installed to left test head.
Furthermore, a lower semicircular groove is formed in the upper side of the lower clamp and used for accommodating the steel pipe, and a first flange and a second flange are respectively arranged on two sides of the lower portion of the lower clamp and are respectively in contact with the left locking device and the right locking device; and a first shoulder and a first step surface are respectively arranged on two sides of the lower semicircular groove at the upper end of the lower clamp and are used for being matched with the upper clamp.
Further, right locking device including set up the first dovetail groove in the middle of the left side, its tank bottom width is less than the width of notch department, correspondingly, be first hypotenuse at the lower limb of first dovetail groove, it contacts with the first flange on lower fixture right side.
Furthermore, the lower part of the upper clamp is provided with an upper semicircular groove, and two sides of the groove are respectively provided with a second shoulder and a second step surface which are matched with the corresponding structures of the lower clamp; and third flanges are respectively arranged on two sides of the upper part of the upper clamp and are respectively contacted with the upper edges of the trapezoidal grooves of the left locking device and the right locking device.
The invention also provides a production process of the totally-enclosed hydraulic composite bimetallic steel pipe, which comprises the following specific steps:
step a, compounding a preparation process, namely enabling an upper clamp to be in a lifting position, enabling a lower clamp and a right locking device to be in a shifting-out position, enabling a left locking device and a right locking device to be in a backward position, and enabling a left test head and a right test head to be in a backward position; the lifting pipe hanging unit puts the steel pipe on the lower clamp;
b, in the pipe feeding process, the lower clamp and the right locking device are integrally moved transversely to feed the steel pipe into a composite production center, the upper clamp is pushed by a lifting oil cylinder to press down to clamp the steel pipe, the left and right locking slips are pushed by a moving oil cylinder to clamp the upper and lower clamps tightly, and the steel pipe enters a to-be-composited state;
c, a hydraulic compounding process, namely, the left test head and the right test head move forward under the pushing of the oil cylinder, and the left test head and the right test head automatically stop moving forward after being tightly propped against the base pipe; after the control system receives signals that the left test head and the right test head are in place, large-gap sealing rings on the left test head and the right test head expand to tightly support the inner wall of the liner tube, a water inlet valve opens the liner tube and is filled with low-pressure water, the water inlet valve and an exhaust valve are sealed, the interior of the liner tube is pressurized, and pressure is maintained;
d, in the unloading process, after the pressure maintaining time is up, the pressure in the steel pipe is removed, the large gap rings on the left test head and the right test head retract, the left test head and the right test head retreat, and the water in the steel pipe flows out;
and e, in the pipe outlet process, the left locking device and the right locking device move backwards, the upper clamp is lifted, the lower clamp and the right locking device integrally move transversely to move the combined steel pipe out of the combining center, and the lifting pipe hanging unit lifts the steel pipe out of the roller way.
Further, in the step b, the steel pipe is clamped and totally enclosed through a connecting structure arranged in the upper clamp, the lower clamp, the left locking device and the right locking device.
Further, in the step c, three sections are provided for controlling the high-pressure water pressure, and the control is as follows: pressurization → pressure maintaining → pressurization → pressure maintaining.
Compared with the prior art, the fully-closed hydraulic composite double-metal steel pipe production process and equipment have the advantages that the core of the fully-closed hydraulic composite double-metal steel pipe production process and equipment is that a full-closed system outside the steel pipe is formed by the upper clamp, the lower clamp, the left test head and the right test head, the bulging of the base pipe is limited in a relatively rigid space during hydraulic composite, the elastic deformation of the whole base pipe is uniform and constant, the deformation force borne by the base pipe and the liner pipe is increased along with the increase of the composite water pressure, the elastic or plastic deformation is avoided, the adhesion degree and the adhesion stability of the liner pipe and the base pipe are improved, the adhesion performance of the composite double-metal pipe is guaranteed, and the original mechanical properties of the base pipe and the liner pipe are guaranteed.
The invention also adopts a specially-made internal expansion type test head which can enter the clamp to adapt to the change of the fixed length of the steel pipe. The invention provides a set of brand new process and equipment by using the fluid bulging theory, so that the production of the composite bimetallic pipe is safe and reliable; the production process of the bimetallic pipe produced by the process has high automation degree, the whole compounding process automatically runs, and the hydraulic bulging force is timely controlled by a computer and randomly adjustable.
Drawings
FIG. 1a is a schematic sectional structure view of a fully-enclosed hydraulic composite bimetallic steel tube production device of the present invention;
FIG. 1b is a schematic view of a first partial structure of the totally enclosed hydraulic composite bimetallic steel tube production plant of the present invention;
FIG. 1c is a second partial structural schematic view of the totally-enclosed hydraulic composite bimetallic steel tube production plant of the present invention;
FIG. 2a is a schematic front view structure diagram of the totally-enclosed hydraulic composite bimetallic steel tube production device of the present invention;
FIG. 2b is a partial structural schematic view of the totally-enclosed hydraulic composite bimetallic steel tube production device of the present invention;
FIGS. 3a-3i are flow state diagrams of the totally-enclosed hydraulic pressure composite bimetallic steel tube production process of the present invention.
Detailed Description
The above and further features and advantages of the present invention are described in more detail below with reference to the accompanying drawings.
Fig. 1a is a schematic sectional view of a fully-enclosed hydraulic composite bimetallic steel tube production device according to the present invention; the totally-enclosed hydraulic composite bimetal steel pipe production device comprises a feeding and discharging unit 20, a lifting pipe hanging unit 11, an upper clamp device 30, a lower clamp device, a left locking device, a right locking device, a left test head assembly, a right test head assembly, and a hydraulic system and an electric control system which are matched with the left locking device, the right locking device, the left test head assembly and the right test head assembly; the base pipe is clamped by the upper clamp device, the lower clamp device, the left locking device and the right locking device, and the elastic deformation of the base pipe is controlled, so that the composite deformation of the base pipe and the base pipe is in a constant value control range.
The feeding and discharging unit 20 comprises a group of racks 21 and a quantitative tube feeder 22, the quantitative tube feeder 22 is driven by a hydraulic oil cylinder and drives to pull a steel tube, and the racks 21 receive the steel tube rolled from a feeding roller way.
The lifting pipe hanging unit 11 is used for hanging the steel pipe from the feeding and discharging unit 20, transversely moving the steel pipe and releasing the steel pipe onto the lower clamp; the lifting device comprises a slide rail 13, a lifting oil cylinder 12 and a lifting piece connected with the lifting oil cylinder 12, wherein the lifting piece can be a hook; the steel pipe hoisting device further comprises a workbench 14 for supporting the sliding rail 13 and a hoisting oil cylinder, the hoisting oil cylinder hoists the steel pipe, a hoisting hook of the hoisting pipe hoists the steel pipe through magnetic force, the steel pipe is hoisted to a proper position through the sliding rail 13 and is placed on the lower clamp.
In order to ensure that the steel pipe has deformation within a controllable range in the compounding process, the steel pipe is fixed by adopting an upper clamp device and a lower clamp device when the steel pipe is compounded. The upper clamp device 30 comprises a lifting oil cylinder 31 and an upper clamp 33 which are integrally arranged on a base of a group of cantilevers; referring to fig. 1b, in the present invention, the end 32 of the piston rod of the lift cylinder 31 is fixed to a connecting member 34, and the connecting member 32 is fixed to the upper end of the upper clamp 33, so as to ensure that the lift cylinder moves together with the upper clamp 33. In this embodiment, the end 32 of the piston rod is provided with a flange, and correspondingly, a groove is provided in the connecting piece, and the upper wall of the groove is contacted with the flange to realize connection; alternatively, the connecting member may be composed of a plurality of connecting plates which are fixed to upper and lower sides of the flange, respectively, and are connected to each other by screws and fixed to the upper end of the upper jig 33.
The lower clamp device and the right locking device are arranged on an integral platform 43 and can be integrally transversely moved; wherein, the right locking device comprises a right locking oil cylinder 42 and a right locking clamping tile 41. The lower clamp device includes a lower clamp 71; referring to fig. 1c, the integral platform 43 is driven by a screw rod 44, two ends of the screw rod 44 are disposed on the bearings 441, a nut seat 443 is installed in the middle of the screw rod 44, a key 442 is connected to the bottom of the nut seat 443, and the key 442 is connected to the bottom end of the lower clamp 71; the screw 44 is driven by a motor, and when the screw 44 rotates, the lower clamp device 71 and the right locking device 41 move integrally.
The left locking device and the right locking device are symmetrically arranged and have the same structure, and the left locking device and the right locking device comprise a left locking oil cylinder 51 and a left locking slip 52, wherein the connecting end part of a piston rod of the left locking oil cylinder is fixedly connected with the left locking slip 52.
Referring to fig. 2a-2b, in the present invention, the left test head assembly includes a left support base 61, a left master cylinder 62, a left exhaust valve 63 and a left test head 64, wherein the left dragging cylinders 62 are arranged in pairs and respectively horizontally mounted on the left support base 61, the left dragging cylinder 62 is connected with the left exhaust valve 63 through a flange 65 at the front end of the piston rod, the left test head 64 is mounted on the right side of the exhaust valve 63, and under the action of hydraulic oil, the left dragging cylinder 62 pushes the left exhaust valve and the left test head to move forward or backward, thereby completing the composite process. The outer side of the left test head is provided with a sheath, and the inner side of the sheath is provided with a large-gap sealing ring.
In the invention, the right test head assembly and the left test head assembly are symmetrically arranged and have the same structure, and comprise a right support seat body 81, a right main oil cylinder, a right dragging oil cylinder 82, a right exhaust valve body 83 and a right test head 84; the connection and working process are the same as those of the left test head assembly.
When the combination is carried out, the sheaths on the left and right test heads are tightly propped against the base pipe and then automatically stop advancing, after the control system receives signals that the left and right test heads are in place, the large-gap sealing rings on the left and right test heads expand to stretch and tighten the inner wall of the base pipe, then a series of operations such as low-pressure water filling, high-pressure water filling and the like are carried out, so that the water pressure in the base pipe is kept at a set value, and the set water pressure value is the bulging force which can enable the base pipe to be in plastic deformation and be tightly attached to the base pipe.
Referring to fig. 3a, the upper and lower clamps and the left and right locking devices of the present invention are engaged with each other to fully seal the steel pipe, a lower semicircular groove 713 is formed at an upper side of the lower clamp 71 to accommodate the steel pipe 10, and a first flange 711 and a second flange 712 are respectively formed at both sides of a lower portion of the lower clamp 71 to be in contact with the left and right locking devices; a first shoulder 715 and a first stepped surface 714 are provided on both sides of the lower semicircular groove 713 of the upper end of the lower jig 71, respectively, for engagement with the upper jig.
The right locking means 41 comprises a first trapezoidal groove 411 arranged in the middle of the left side, the width of the bottom of which is smaller than the width of the groove at the opening, and correspondingly, a first inclined edge 412 is arranged at the lower edge of the first trapezoidal groove 411 and is in contact with a first flange at the right side of the lower clamp 71. The left locking device 53 has the same structure as the right retracting device, and a second trapezoidal groove 531 is arranged in the middle of the right side.
The upper clamp 33 has the same structure as the lower clamp 71, an upper semicircular groove 332 is formed in the lower portion of the upper clamp, and a second shoulder 335 and a second step surface 334 are respectively formed on two sides of the groove and are matched with the corresponding structure of the lower clamp. Third flanges 331 are respectively provided at both sides of the upper portion of the upper jig, and are respectively in contact with upper edges of the trapezoidal grooves of the left and right locking devices, and in this embodiment, the upper edge of the first trapezoidal groove 411 is a second inclined edge 413 which is in contact engagement with the third flanges 331.
The invention adopts four split structures of an upper clamp, a lower clamp and a left locking device and a right locking device, and respectively adopts a movable mode of hydraulic drive to clamp a steel pipe, thereby being convenient for adjustment and controlling the clamping degree.
Based on the totally-enclosed hydraulic composite bimetallic steel tube production device, please refer to fig. 3a-3i, the totally-enclosed hydraulic composite bimetallic steel tube production process of the invention is as follows:
step a, a composite preparation process:
the upper clamp 33 is in a lifting position, the lower clamp 71 and the right locking device 41 are in a moving-out position, the left locking device 53 and the right locking device 41 are in a backward position, and the left test head and the right test head are in a backward position; the pipe hanger unit 11 is lifted to place the steel pipe 10 on the lower jig 33.
Step b, pipe feeding process:
the lower clamp 71 and the right locking device 41 are integrally moved transversely to send the steel pipe 10 into the compound production center, the upper clamp 33 is pushed by the lifting oil cylinder 31 to press down to clamp the steel pipe, and the left and right locking slips are pushed by the moving oil cylinder to clamp the upper and lower clamps until the steel pipe enters a to-be-compounded state.
Step c, a hydraulic compounding process:
the left and right test heads advance under the pushing of the oil cylinder, and the sheaths on the left and right test heads automatically stop advancing after being tightly propped against the base pipe;
after the control system receives signals that the left test head and the right test head are in place, the large-gap sealing rings on the left test head and the right test head expand to tightly support the inner wall of the liner tube, the water inlet valve opens the liner tube to be filled with low-pressure water, the water inlet valve and the exhaust valve are sealed, the pressure in the liner tube is increased, and the pressure is maintained.
And performing a series of operations of low-pressure water inflation, high-pressure water inflation and the like to keep the water pressure in the liner pipe at a set value, wherein the set water pressure value is the bulging force which can enable the liner pipe to be plastically deformed and tightly attached to the base pipe. Wherein, when controlling high pressure water pressure, set up 3 intervals, control as follows: pressurization → pressure maintaining → pressurization → pressure maintaining → pressurization; the maximum combined water pressure is 140 MPa.
Step d, unloading process:
after the pressure maintaining time is up, the pressure in the steel pipe is removed, the large clearance rings on the left test head and the right test head retract, the left test head and the right test head retreat, and the water in the steel pipe flows out.
The invention aims to ensure that water in the steel pipe can automatically flow cleanly, and the totally-enclosed water pressure composite double-metal steel pipe production equipment is integrally installed in an inclined way by 2 degrees.
Step e, a pipe outlet process:
the left locking device and the right locking device retreat, the upper clamp 33 is lifted, the lower clamp 71 and the right locking device 41 integrally move transversely to move the combined steel pipe out of the combining center, and the lifting pipe hanging unit 11 lifts the steel pipe out of the roller way.
Experiments prove that the maximum deformation of the base pipe is within 1.5 percent, the base pipe is elastically deformed, and the overall mechanical property of the base pipe is not changed.
The clamping force of the whole pipe body must meet the requirement of continuously increasing composite water pressure after the base pipe generates maximum elastic deformation, and the purpose of preventing the composite pipe from further deforming when the composite water pressure is continuously increased is achieved. The clamp at this time must be relatively rigid and not subject to any deformation. Thus, the integral deformation of the composite pipe is ensured to be uniform, and the composite pipe has the same property. The clamping force of the upper clamp, the lower clamp, the left clamping device and the right clamping device meets the clamping force of the whole pipe body.
The foregoing is merely a preferred embodiment of the invention, which is intended to be illustrative and not limiting. It will be understood by those skilled in the art that various changes, modifications and equivalents may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. A totally-enclosed hydraulic composite bimetal steel pipe production device is characterized by comprising a feeding and discharging unit, a lifting pipe hanging unit, an upper clamp device, a lower clamp device, a left locking device, a right locking device, a left test head assembly and a right test head assembly; wherein,
the upper clamp device, the lower clamp device, the left locking device and the right locking device clamp the steel pipe, the steel pipe is totally closed, and the elastic deformation of the base pipe is controlled, so that the composite deformation of the base pipe and the liner pipe is in a constant value control range; the lower clamp device and the right locking device are arranged on an integral platform and can be integrally transversely moved; the lower clamp device comprises a lower clamp, the right locking device comprises a right locking oil cylinder and a right locking clamping tile, and the connecting end part of a piston rod of the right locking oil cylinder is fixedly connected with the right locking clamping tile; the left locking device and the right locking device are symmetrically arranged, and the left locking device comprises a left locking oil cylinder and a left locking slip;
the lifting pipe hanging unit is used for hanging the steel pipe, transversely moving and releasing the steel pipe to the lower clamp device; the left test head assembly and the right test head assembly are symmetrically arranged, and the exhaust valve body and the test head are pushed to advance or retreat by the main oil cylinder to complete the compounding process.
2. The fully-closed hydraulic composite bimetal steel pipe production device according to claim 1, wherein the upper clamp device comprises a lifting oil cylinder and an upper clamp which are integrally arranged on a beam of a cantilever; the tail end of a piston rod of the lifting oil cylinder is fixed with a connecting piece, and the connecting piece is fixed with the upper end of the upper clamp so that the lifting oil cylinder and the upper clamp move together.
3. A fully-enclosed hydraulic composite bimetallic steel tube production device as in claim 1 or 2, characterized in that the left test head assembly comprises a left support base, a left master cylinder, a left dragging cylinder, a left exhaust valve body and a left test head, wherein the left dragging cylinder is arranged in pairs and respectively horizontally mounted on the left support base, the left master cylinder is connected with the left exhaust valve body through a flange at the front end of the piston rod, and the left test head is mounted on the right side of the exhaust valve body.
4. The fully-closed hydraulic composite bimetal steel tube production device according to claim 1, wherein a lower semicircular groove is formed in the upper side of the lower clamp to accommodate the steel tube, and a first flange and a second flange are respectively arranged on two sides of the lower part of the lower clamp and are respectively contacted with the left locking device and the right locking device; and a first shoulder and a first step surface are respectively arranged on two sides of the lower semicircular groove at the upper end of the lower clamp and are used for being matched with the upper clamp.
5. A fully enclosed hydraulic composite bimetallic steel tube production plant as in claim 4, wherein the right locking means comprises a first trapezoidal groove disposed in the middle of the left side, the width of the bottom of the groove being less than the width of the notch, and correspondingly, the lower edge of the first trapezoidal groove is a first oblique edge which contacts with the first flange on the right side of the lower fixture.
6. A fully-closed hydraulic composite bimetal steel tube production device as claimed in claim 5, wherein the lower part of the upper clamp is provided with an upper semicircular groove, and two sides of the groove are respectively provided with a second shoulder and a second step surface which are matched with corresponding structures of the lower clamp; and third flanges are respectively arranged on two sides of the upper part of the upper clamp and are respectively contacted with the upper edges of the trapezoidal grooves of the left locking device and the right locking device.
7. A totally-enclosed hydraulic pressure composite bimetal steel pipe production process using the totally-enclosed hydraulic pressure composite bimetal steel pipe production device in claim 1 is characterized by comprising the following specific steps:
step a, compounding a preparation process, namely enabling an upper clamp to be in a lifting position, enabling a lower clamp and a right locking device to be in a shifting-out position, enabling a left locking device and a right locking device to be in a backward position, and enabling a left test head and a right test head to be in a backward position; the lifting pipe hanging unit puts the steel pipe on the lower clamp;
b, in the pipe feeding process, the lower clamp and the right locking device are integrally moved transversely to feed the steel pipe into a composite production center, the upper clamp is pushed by a lifting oil cylinder to press down to clamp the steel pipe, the left and right locking slips are pushed by a moving oil cylinder to clamp the upper and lower clamps tightly, and the steel pipe enters a to-be-composited state;
c, a hydraulic compounding process, namely, the left test head and the right test head move forward under the pushing of the oil cylinder, and the left test head and the right test head automatically stop moving forward after being tightly propped against the base pipe; after the control system receives signals that the left test head and the right test head are in place, large-gap sealing rings on the left test head and the right test head expand to tightly support the inner wall of the liner tube, a water inlet valve is opened, the liner tube is filled with low-pressure water, the water inlet valve and an exhaust valve are sealed, the pressure in the liner tube is increased, and the pressure is maintained;
d, in the unloading process, after the pressure maintaining time is up, the pressure in the steel pipe is removed, the large-gap sealing rings on the left test head and the right test head retract, the left test head and the right test head retreat, and the water in the steel pipe flows out;
and e, in the pipe outlet process, the left locking device and the right locking device move backwards, the upper clamp is lifted, the lower clamp and the right locking device integrally move transversely to move the combined steel pipe out of the composite production center, and the lifting pipe hanging unit lifts the steel pipe out of the roller way.
8. A fully-enclosed hydraulic composite bimetallic steel tube production process as in claim 7, wherein in step b, the fully-enclosed steel tube is clamped and secured through connecting structures arranged in the upper and lower clamps, the left and right locking devices.
9. The fully-enclosed hydraulic composite bimetallic steel tube production process as in claim 7, wherein in the step c, three sections are provided for controlling the high-pressure water pressure, and the control is as follows: pressurization → pressure maintaining → pressurization → pressure maintaining.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410655267.4A CN104492900B (en) | 2014-11-17 | 2014-11-17 | A kind of totally-enclosed hydraulic pressure bimetal composite production technology of steel tube and device |
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| CN201410655267.4A CN104492900B (en) | 2014-11-17 | 2014-11-17 | A kind of totally-enclosed hydraulic pressure bimetal composite production technology of steel tube and device |
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| CN104492900B true CN104492900B (en) | 2018-07-06 |
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| CN105215131A (en) * | 2015-10-27 | 2016-01-06 | 中国重型机械研究院股份公司 | A kind of composite bimetal pipe liquid rises to be shaped and entirely clasps device |
| CN105290241B (en) * | 2015-10-28 | 2017-04-19 | 中国重型机械研究院股份公司 | Bimetal composite pipe forming technology and system with heating and water pressure coupling functions |
| CN105414302B (en) * | 2015-12-01 | 2017-08-01 | 保隆(安徽)汽车配件有限公司 | A kind of High efficient pipe partses forming machine |
| CN105363873B (en) * | 2015-12-01 | 2017-06-30 | 保隆(安徽)汽车配件有限公司 | A kind of convenience hydraulic tube piece forming machine |
| CN105921543B (en) * | 2016-04-29 | 2019-01-25 | 西安向阳航天材料股份有限公司 | Reduce the composite bimetal pipe hydraulic pressure combined shaping method of liner axial direction residual stress |
| CN113369816B (en) * | 2021-06-17 | 2023-03-17 | 高密天一机械科技有限公司 | Production method of composite steel pipe with outer plastic-coated and inner stainless steel lining |
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Address after: 030000 Room 1101-1102, Building 1, District D, No. 9, Jiefang North Road, Xinghualing District, Taiyuan City, Shanxi Province Patentee after: Taiyuan Longheng Haiwei Technology Co., Ltd. Address before: 030000 Wanguocheng Building No.3, Changfeng West Street, Wanbailin District, Taiyuan City, Shanxi Province, 1603 Patentee before: TAIYUAN ZONGHENG HAIWEI MACHINE EQUIPMENT CO., LTD. |