CN116393915A - Hot jacket processing device and method for large thin-wall pipe fitting - Google Patents
Hot jacket processing device and method for large thin-wall pipe fitting Download PDFInfo
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- CN116393915A CN116393915A CN202310667556.5A CN202310667556A CN116393915A CN 116393915 A CN116393915 A CN 116393915A CN 202310667556 A CN202310667556 A CN 202310667556A CN 116393915 A CN116393915 A CN 116393915A
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- B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for
- B23P11/02—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits
- B23P11/025—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits by using heat or cold
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Abstract
The invention discloses a hot sleeve processing device and a hot sleeve processing method for a large thin-wall pipe fitting, wherein a steel composite pipe obtained after hot sleeve matching can be used as an artificial well wall to participate in well cementation, and belongs to the technical field of pipe fitting processing; the hot jacket processing device comprises an inner pipe moving device, a cooling circulation device, a calibration positioning device, an outer pipe partition heating module and an outer pipe micro-motion platform; the method comprises a preparation process, a heating process, a positioning process, a carry process and a resetting process, so that the interference assembly of the inner pipe and the outer pipe is realized; the method reduces the heated deformation of the inner pipe by carrying out partition cooling on the inner pipe and partition heating on the outer pipe; and a positioning and calibrating device is adopted before assembly, so that the assembly precision is improved.
Description
Technical Field
The invention belongs to the technical field of pipe fitting machining, and particularly relates to a hot jacket machining device and method for a large thin-wall pipe fitting, which are suitable for manufacturing artificial well walls in the field of deep well cementation.
Background
The medium-deep geothermal energy is natural geothermal energy extracted from the crust, the energy comes from lava in the earth and exists in a thermal energy form, and under the condition that the environmental awareness of people is gradually enhanced and the energy is gradually shortened, the geothermal energy is taken as a new clean energy, and the reasonable development and utilization of geothermal resources are increasingly favored by people. Deep drilling well cementation is needed for geothermal exploitation, and geothermal is output through a shaft.
In the process of well drilling, in order to strengthen the well wall, continuous drilling is ensured to separate oil, water and gas layers, normal operation during exploration is ensured, a common well cementation method is to put a casing into, and cement is injected into an annular space between the casing and the well wall. When drilling deep into a middle-deep Ore rock karst cave type stratum, a common well cementation technology is adopted, namely the stratum is taken as a well wall, and a method of cementing into an annular space of a sleeve and the well wall after the sleeve is put into the well wall is adopted, so that effective well cementation cannot be realized. Because the stratum fissures, pores and small karst cave are developed in the geological distribution compared with the upper layer when the stratum is deeply penetrated into the middle-deep Oryza rock karst cave type stratum. At this time, injected cement can run off from the karst cave, so that the consumption of cement can be greatly increased; on the other hand, because the cement is unevenly distributed in the large karst cave and the small karst cave, the well cementation is not firm, and the subsequent procedures are affected.
The problems of excessive cement, unstable well cementation and the like caused by karst cave type stratum in the prior art of medium-deep well cementation are solved, and steel pipe parts with interference fit can be used to be used as artificial well walls after being welded and fixed in sections. Cement is injected into the annular space of the artificial well wall and the sleeve during well cementation, so that the cement consumption is greatly reduced, and the well cementation reliability is improved. Each section of artificial well wall is formed by hot jacket matching of two large thin-wall long-type pipe parts. When the common hot jacket process is adopted, the inner pipe and the outer pipe are horizontally matched, the outer pipe can generate radial deformation due to dead weight after being heated, and the outer pipe can possibly expand inwards to reach the artificial well wall of the required summation standard. In addition, in the matching process, the interference and the assembly coaxiality of the parts are difficult to ensure due to the large size of the parts. For this situation, the general hot-box mechanism and process method cannot meet the actual needs. Therefore, how to optimize the hot jacket mechanism and determine a reasonable hot jacket process to ensure the coaxiality of the inner tube and the outer tube during the matching and improve the accuracy and the safety of hot jacket has become a new problem which needs to be solved by technicians.
Disclosure of Invention
The invention overcomes the defects of the prior art, and provides a hot jacket processing device and a hot jacket processing method for a large thin-wall pipe fitting, which solve the problem that an inner pipe and an outer pipe are subjected to thermal deformation during hot jacket processing of the large thin-wall pipe fitting; and the interference and the assembly coaxiality are difficult to ensure, so that the assembly precision is reduced.
In order to achieve the above purpose, the present invention is realized by the following technical scheme.
The hot jacket processing device is of a vertical and vertical assembly structure and comprises an inner pipe moving device, a cooling circulation device, a calibration positioning device, an outer pipe partition heating module and an outer pipe micro-motion platform;
the inner pipe moving device is used for clamping the inner pipe and placing the inner pipe into the outer pipe along the axial direction of the outer pipe;
the cooling circulation device is positioned in the inner pipe, the bottom of the cooling circulation device is connected with a cooling baffle, the cooling baffle and the inner wall of the inner pipe form a cooling airtight space, and the cooling circulation device is connected with a lifting mechanism for synchronously moving with the inner pipe;
the outer wall of the outer tube is provided with the outer tube partition heating module, and the outer tube is arranged on the outer tube micro-motion platform; the outer pipe partition heating module is provided with heating sections with temperature controlled respectively along the axial direction of the outer pipe and is used for heating the outer pipe in a segmented mode; the outer tube micro-motion stage is used to adjust the position of the outer tube in the horizontal X, Y direction to remain coaxial with the inner tube.
The calibration positioning device comprises a laser calibrator, an inner pipe and outer pipe matching device and a laser receiving device; the inner and outer pipe matching device is positioned between the inner pipe and the outer pipe, the inner and outer pipe matching device is a cavity with an upper opening and a lower opening, and the inner side surface of the inner and outer pipe matching device is an arc-shaped curved surface and is used for limiting and guiding the inner pipe to move so as to reduce the radial deflection of the inner pipe; a shading film is connected in the cavity, and a light hole is formed in the shading film; the laser alignment meter, the laser receiving device and the light hole are all positioned on the central axis of the outer tube.
Preferably, the inner tube moving device further comprises a bearing beam, the bearing beam is provided with a sliding rail, and the inner tube moving device is in sliding connection with the sliding rail through a sliding block.
Preferably, the cooling circulation device comprises a cooling liquid inlet pipe and a cooling liquid outlet pipe, the upper part of the cooling liquid inlet pipe is connected with a spray header, the lower part of the cooling liquid inlet pipe is provided with a cooling liquid circulation inlet sequence valve, the cooling liquid outlet pipe is provided with a cooling liquid circulation outlet one-way valve, the cooling liquid circulation outlet one-way valve is higher than the cooling liquid circulation inlet sequence valve, and the cooling liquid inlet pipe and the cooling liquid outlet pipe are both connected with a cooling baffle.
More preferably, the lifting mechanism comprises a cooling device lifting motor and a screw rod connected with the cooling device lifting motor, and the screw rod is connected with a cooling liquid outlet pipe.
Preferably, the inner pipe descending safety speed limiting device comprises a speed limiting device shell, wherein the inner pipe descending safety speed limiting device is positioned between the inner pipe and the outer pipe, the inner pipe descending safety speed limiting device comprises an inflatable annular gasket, and the inner wall of the speed limiting device shell is provided with an inflatable annular gasket.
Preferably, the cavity wall of the inner and outer tube matching device is provided with an infrared thermometer and a positioning block, and the positioning block is movably connected with the cavity wall and used for limiting the expansion amount of the outer tube along the radial movement of the outer tube.
Preferably, the laser gauge is positioned at the center of the bottom of the cooling baffle, and the laser receiving device is positioned at the center of the inner part of the outer tube micro-motion platform.
Preferably, the upper end part of the outer tube micro-motion platform is a trapezoid boss which is internally supported on the inner wall of the outer tube, the trapezoid boss is arranged on an upper base, a middle layer supporting seat is arranged at the bottom of the upper base, and a Y-direction guide rail is arranged on the upper surface of the middle layer supporting seat; the upper base is connected to the Y-direction guide rail in a sliding way; the middle layer supporting seat bottom is provided with the lower floor's base, lower floor's base upper surface is provided with X and to the guide rail, middle layer supporting seat sliding connection is on X to the guide rail.
The hot jacket processing method based on the hot jacket processing device for the large thin-wall pipe fitting comprises the following steps of:
1) The preparation process comprises the following steps: the inner pipe is arranged above the outer pipe through the inner pipe moving device, and the outer pipe is positioned in the tunnel; and opening a cooling circulation device positioned in the inner pipe in advance, and synchronously and axially moving along with the inner pipe in a subsequent carry procedure.
2) Heating procedure: the outer tube is heated by the outer tube zone heating module and the temperature of the outer tube is measured.
3) Positioning procedure: after the required interference magnitude is achieved, the calibration positioning device is started, the outer tube micro-motion platform for fixing the outer tube is adjusted, so that laser of the calibration positioning device passes through the center of the inner tube and the light holes of the shading film, and the center of the outer tube is guaranteed to be coaxial.
4) Carry procedure: the inner pipe descends at a constant speed under the action of dead weight and heavy objects on the inner pipe and is assembled with the outer pipe in a hot sleeve manner; according to the axial position of the inner tube moving during matching and the data of the temperature measuring device, the temperature of the outer tube partition heating module corresponding to different areas of the outer tube is adjusted.
5) Resetting; after the carry procedure is finished, closing the outer pipe partition heating module, and waiting for the inner pipe and the outer pipe to finish natural cooling; and after the carry is finished, closing a liquid inlet of the cooling circulation device, and lifting and resetting the cooling circulation device and the inner pipe moving device.
Preferably, the outer tube partition heating module is divided into a plurality of heating areas from top to bottom along the axial direction of the outer tube; after the inner tube contacts with the arc-shaped curved surface, the inner tube enters the inner tube and outer tube matching device and enters the inner tube corresponding to a plurality of heating areas along the upper part of the outer tube, the heating areas entering from the end part of the inner tube are correspondingly heated to the temperature of the hot jacket, and the rest heating areas are correspondingly cooled.
Compared with the prior art, the invention has the following beneficial effects:
the steel composite pipe obtained by the hot jacket device and the method can be used as an artificial well wall to participate in well cementation, so that the consumption of cement used in karst cave type stratum in medium-deep well cementation is reduced, and the firmness of well cementation is improved.
Compared with the traditional hot jacket device and method, the invention reduces the heated deformation of the inner pipe and the outer pipe by zone cooling the inner pipe and zone heating the outer pipe; and a positioning and calibrating device is adopted before assembly, so that the assembly precision of the inner and outer pipe thermal sleeve is improved. The invention solves the problems that the inner and outer pipes are subject to thermal deformation during hot jacket processing of the large thin-wall pipe fitting, and the interference and the assembly coaxiality are difficult to ensure, so that the assembly precision is reduced.
Drawings
FIG. 1 is a schematic structural view of a hot jacket processing device for large thin-walled pipe fittings according to the present invention;
FIG. 2 is an isometric view of the inner jaw chuck jaws of the inner tube displacement device of the present invention;
FIG. 3 is a bottom view of FIG. 2;
FIG. 4 is a schematic structural view of the inner tube descending safety speed limiting device according to the present invention;
FIG. 5 is a schematic view of a cooling circulation device according to the present invention;
FIG. 6 is a top view of a cooling baffle attached to a cooling circulation device according to the present invention;
FIG. 7 is a schematic view of the inner and outer tube fitting apparatus according to the present invention;
FIG. 8 is a schematic diagram of the connection positions of the infrared thermometer, the positioning block and the inner and outer tube matching device;
FIG. 9 is a schematic view of the structure of the micro-motion platform of the outer tube according to the present invention;
fig. 10 is a schematic structural view of a trapezoid boss provided by the micro-motion platform of the outer tube.
In the figure:
1 is an inner pipe, 2 is an outer pipe, 3 is a bearing beam, 4 is an inner pipe moving device, 6 is a cooling circulation device, 7 is an inner pipe descending safety speed limiting device, 8 is an inner pipe and outer pipe matching device, 9 is an infrared thermometer, 10 is a positioning block, 11 is a heat insulation brick, 12 is an outer pipe partition heating module, 13 is an outer pipe micro-motion platform, 15 is a screw rod, 18 is a cooling device lifting motor, 19 is a cooling baffle, 20 is a laser collimator, and 21 is a laser receiving device;
401 is an inner jaw chuck body, 402 is an inner jaw chuck jaw;
701 is a speed limiting device housing, 702 is an inflatable annular gasket, 703 is a device inflation inlet;
601 is a cooling liquid inlet pipe, 602 is a spray header, 603 is a cooling liquid circulation inlet sequence valve, 604 is a cooling liquid circulation outlet one-way valve, and 605 is a cooling liquid outlet pipe;
801 is an outer shell of the inner and outer tube matching device, 802 is an arc-shaped curved surface, 803 is a shading film;
1004 is a positioning block threaded rod, 1201 is a first area, 1202 is a second area, 1203 is a third area;
1302 are trapezoidal boss, 1303 are X-direction guide rails, 1304 are lower-layer base, 1305 are Y-direction guide rails, 1306 are middle-layer supporting seats, 1307 are upper-layer base.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail by combining the embodiments and the drawings. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. The following describes the technical scheme of the present invention in detail with reference to examples and drawings, but the scope of protection is not limited thereto.
Referring to fig. 1-10, in the large thin-wall pipe fitting hot jacket processing device of the embodiment, a steel composite pipe obtained after hot jacket matching can be used as a manmade well wall to participate in well cementation. The hot jacket processing device is of a vertical and vertical assembly structure, namely, the outer pipe 2 is positioned in a tunnel, and the inner pipe 1 enters the outer pipe 2 from the upper end part of the outer pipe 2 and carries out hot jacket processing with the outer pipe 2. The mechanism is matched with the inner tube and the outer tube in a vertical and vertical matching mode. Compared with horizontal matching, the vertical assembly reduces radial deformation of the pipe parts due to dead weight after heating; the inner pipe 1 is hung in the air, and the outer pipe 2 is positioned in the underground tunnel, so that the height of the device is reduced, and the effective utilization of space is improved.
In this example, the outer diameter d1=450 mm, the inner diameter d2=430 mm, the outer diameter d1=432 mm, the inner diameter d2=410 mm, and the wall thickness of the outer tube 2 taken 10mm are adopted. The length of the inner pipe 1 is 10m, the outer pipe 2 is about 1m longer than the inner pipe 1, and the upper end and the lower end of the outer pipe 2 are about 0.5m free from the inner pipe 1 after interference fit, so as to meet the requirement of weldability. The inner tube 1 and the outer tube 2 need to be selected and designed in consideration of the following points: the outer tube 2 is used as an outer wall and is in an acid water-rich stratum formed by dissolving gases such as carbon dioxide, sulfur dioxide and the like in water for a long time, and the requirement of corrosion resistance needs to be considered; and in actual construction, the outer tube 2 needs to be welded into the stratum after each segment is required to be welded, so that the weldability of the material needs to be considered. The inner tube 1 needs to be considered to have certain wear resistance, strength and rigidity as a carrier for the subsequent cement fixation. In the embodiment, the outer tube 2 can be made of 08F carbon structural steel, has low carbon content and strong corrosion resistance, and has good weldability; the inner tube 1 can be made of 60 steel, has higher carbon content, has certain wear resistance and elasticity, and can improve the integral frame strength of the well wall. After the inner pipe and the outer pipe are in interference fit, on one hand, the comprehensive performance is improved, and different performance requirements are met. On the other hand, due to the tightening force generated by the elastic deformation of the two pipes after interference fit, the radial pressure generated by the internal pressure Pi generated by the inner pipe during operation is reduced, and the working pressure limit of the inner pipe is improved; and because the inner tube and the outer tube are elastically deformed during sleeving, negative tangential stress is generated on the inner tube, and the elastic limit bearing capacity of the inner tube is improved.
The hot jacket processing device comprises a bearing beam 3, an inner pipe moving device 4, a cooling circulation device 6, a calibration positioning device, an outer pipe partition heating module 12 and an outer pipe micro-motion platform 13.
Specifically, the load beam 3 is made of high-strength metal materials, the weight is lighter under the condition of meeting the rigidity and strength, and the whole structure is stable and reliable. Guide rails are arranged on the left side and the right side of the bearing beam 3, and the inner pipe moving device 4 drives the inner pipe 1 to complete axial movement through a guide rail sliding block mechanism, and the travel S=12m of the guide rails on the bearing beam 3. The inner pipe moving device 4 is provided with an inner jaw chuck main body 401, and four-jaw inner jaw chuck jaws 402 are uniformly distributed and connected on the inner jaw chuck main body 401; clamping at the upper end of the inner tube 1 by means of inner jaw chuck jaws 402; the inner claw chuck claw 402 clamps the outer side of the inner pipe 1 and performs radial limiting and axial movement on the inner pipe 1; the inner tube moving device 4 is lifted using electric drive after releasing the inner tube 1. When descending, grasp the inner tube 1, turn off the motor, and drive the slide block to move downwards at the guide rail by the dead weight action of the inner tube 1 and the weight thereon.
Specifically, the cooling circulation device 6 is located in the inner tube 1 and can move up and down relative to the inner tube 1; the bottom of the cooling circulation device 6 is connected with a cooling baffle 19, the cooling baffle 19 and the inner wall of the bottom of the inner tube 1 form a cooling closed space, and the cooling circulation device 6 is connected with a lifting mechanism for synchronously moving with the inner tube 1; the lifting mechanism comprises a cooling device lifting motor 18 and a screw rod 15 connected with the cooling device lifting motor 18. The cooling circulation device 6 comprises a left cooling liquid inlet pipe 601, a right cooling liquid inlet pipe 601 and a cooling liquid outlet pipe 605 positioned in the middle, wherein the upper part of the cooling liquid inlet pipe 601 is connected with a spray header 602, a cooling liquid circulation inlet sequence valve 603 is arranged at the lower part of the cooling liquid inlet pipe 601, a cooling liquid outlet pipe 605 is provided with a cooling liquid circulation outlet one-way valve 604, the cooling liquid circulation outlet one-way valve 604 is higher than the cooling liquid circulation inlet sequence valve 603, and the bottoms of the cooling liquid inlet pipe 601 and the cooling liquid outlet pipe 605 are both connected with a cooling baffle 19. The screw rod 15 is connected with the top of a cooling liquid outlet pipe 605, and the cooling liquid outlet pipe 605 is provided with a liquid outlet for discharging cooling liquid. The cooling circulation device 6 can adopt two modes of spray cooling and circulation cooling respectively according to the heating degrees of different areas of the inner tube 1 along the axial direction. The cooling liquid is pumped by the liquid inlet above the cooling liquid inlet pipe 601, a small part is sprayed out by the spray header 602 corresponding to the upper part or the middle part of the inner pipe 1, the inner pipe 1 is cooled in a water mist mode, the rest part flows out from the cooling liquid circulation inlet sequence valve 603 at the lower part of the cooling liquid inlet pipe 601, the cooling liquid gradually fills the annular closed space formed by the inner wall of the inner pipe 1 and the cooling baffle 19 at the bottom, the height of the cooling liquid gradually rises, then flows into the cooling liquid outlet pipe 605 through the cooling liquid circulation outlet one-way valve 604, and then is discharged through the liquid outlet arranged on the cooling liquid outlet pipe 605 and the connected liquid outlet pipeline. The cooling device integrally moves up and down axially through a screw 15 connected with a cooling liquid outlet pipe 605 and a cooling device lifting motor 18. When the inner pipe and the outer pipe are matched, the device descends at a synchronous speed, and when the matching is completed, the device is lifted and reset at a faster speed so as to meet the next cooling operation.
Specifically, an inner pipe descending safety speed limiting device 7 is horizontally installed at the lower part of the bearing beam 3, the outer shape of the inner pipe descending safety speed limiting device 7 is a flange clamp type, the inner pipe descending safety speed limiting device 7 comprises a speed limiting device shell 701, an inflatable annular gasket 702 is arranged on the inner wall of the speed limiting device shell 701, and a device inflation inlet 703 is formed in the inflatable annular gasket 702; the annular gasket is made of novel organic polymer materials, and has the advantages of higher elasticity, higher strength, higher melting point and larger surface roughness. By adjusting the magnitude of the pressure P inside the gasket, the magnitude of the frictional force with the inner tube 1 can be controlled, thereby controlling the speed at which the inner tube 1 descends. When an emergency is met, the pressure of the inflatable annular gasket 702 is rapidly increased to the maximum P0, and the inner tube 1 is limited, so that a safety control effect is achieved. When the inner tube 1 is lifted, the air pressure drop in the inflatable annular gasket 702 is 0, the inflatable annular gasket 702 and the inner tube 1 are separated from contact, and the inner tube 1 is lifted by electric drive.
Specifically, the outer tube 2 is arranged in the pit, an outer tube partition heating module 12 is arranged on the outer wall of the outer tube 2 in a surrounding mode, and insulating bricks 11 are arranged on the periphery of the outer tube partition heating module 12. In the hot jacket process, in order to avoid the inner tube 1 from being thermally expanded to be in contact with the outer tube 2, the outer tube partition heating module 12 is divided into a first region 1201, a second region 1202 and a third region 1203 from top to bottom along the axial direction of the outer tube 2, and the three regions can be respectively subjected to temperature control.
In the design process of the mechanism, the relationship between the expansion amount of the steel pipe and the temperature is considered to be lagged compared with the theoretical condition due to the influence of factors such as material processing, a heating device, the surrounding environment and the like in the actual processing process. Therefore, in order to improve the processing efficiency, it is necessary to heat the outer tube 2 to reach the heating temperature T1 beyond the rated temperature T0 thereof, so as to achieve the desired interference. The temperature was maintained at T0 during the incubation. I.e. heating and holding, requires two temperatures. In the process, the interference is measured by 2mm, and the temperature is calculated to be T0=200deg.C, and the temperature is calculated to be 250deg.C for T1. The outer tube zone heating module 12 uses zone heating modules, and can adjust the heating degree of different positions of the outer tube 2.
The outer tube 2 is a large thin-walled part, and has the possibility of shrinking the inner diameter during thermal expansion. Therefore, the bottom of the outer tube 2 is arranged on the outer tube micro-motion platform 13; the upper end of the outer tube micro-motion platform 13 is a trapezoid boss 1302, and the side slope of the trapezoid boss is 1:10. the trapezoidal boss 1302 is supported on the inner wall of the outer tube 2, and has a downward moving trend under the action of the dead weight of the outer tube 2, and at this time, the trapezoidal boss 1302 plays a role of an inner supporting device, so that the inner expansion of the outer tube 2 can be avoided. The trapezoid boss 1302 is arranged on an upper base 1307, a middle layer supporting seat 1306 is arranged at the bottom of the upper base 1307, and a Y-shaped guide rail 1305 is arranged on the upper surface of the middle layer supporting seat 1306; the upper base 1307 is slidably connected to the Y-guide track 1305; the bottom of the middle layer support base 1306 is provided with a lower layer base 1304, the upper surface of the lower layer base 1304 is provided with an X-guide rail 1303, and the middle layer support base 1306 is slidably connected to the X-guide rail 1303. During heating, the outer tube micro-motion platform 13 moves along the direction X, Y to realize bidirectional position adjustment of the outer tube 2, so that the outer tube 2 is kept coaxial with the inner tube 1 at a horizontal X, Y direction.
Specifically, the calibration positioning device comprises a laser calibrator 20, an inner pipe and outer pipe matching device 8 and a laser receiving device 21; the inner and outer pipe matching device 8 is positioned on a ground tunnel, the inner and outer pipe matching device 8 comprises an inner and outer pipe matching device shell 801, the inner and outer pipe matching device shell 801 is a cavity with an upper opening and a lower opening, and the inner side surface of the inner and outer pipe matching device shell 801 is an arc-shaped curved surface 802 for limiting and guiding the inner pipe 1 to move so as to reduce radial deflection of the inner pipe 1; the top end of the outer tube 2 extends from the bottom of the inner and outer tube fitting housing 801. The middle part level is connected with shading film 803 in the inside and outside pipe cooperation device shell 801, and shading film 803 is the black material that the depression was worn out, like black plastic film for shading, shading film 803 center is provided with the light trap that the diameter is 0.01mm for laser calibration. Symmetrical through holes are formed in the left side and the right side of the outer shell 801 of the inner pipe and the outer pipe of the matching device, positioning blocks 10 are placed in the through holes, a positioning block threaded rod 1004 is connected with the positioning blocks 10 along the radial threads of the inner pipe 1, the other end of the positioning block threaded rod 1004 is fixed on the bearing beam 3, and the positioning blocks 10 can move outwards through the through holes in a threaded transmission mode and are used for limiting the expansion amount of the outer pipe 2. The middle part of the device is provided with a layer of shading film, a small hole is formed in the center of the shading film, and an infrared thermometer 9 is further arranged on the cavity and used for measuring the temperature of the outer tube 2.
The laser gauge 20 is positioned at the center of the bottom of the cooling baffle 19, the laser receiving device 21 is positioned at the center of the trapezoid boss 1302 inside the outer tube 2 on the outer tube micro-motion platform 13.
The hot jacket processing method based on the hot jacket processing device for the large thin-wall pipe fitting specifically comprises the following steps:
step one, finishing the preparation process: the inner pipe 1 is clamped and fixed by four-claw inner claw chuck claws 402 and is hung on the bearing beam 3 through an inner pipe moving device 4; the inner tube safety speed limiting device 7 is started, and the pressure at the inflation inlet 703 of the upper device is regulated, so that the inner tube 1 is limited. The outer tube 2 is positioned in the tunnel, insulating bricks 11 and an outer tube partition heating module 12 are arranged around the outer tube 2, and the bottom of the outer tube 2 is fixed by a micro-motion platform 13. The cooling circulation device 6 is started in advance, cooling liquid is pumped in through a liquid inlet at the top of the cooling liquid inlet pipe 601, and a part of liquid is sprayed out from the spray header 602; the other part flows out from the cooling liquid circulation inlet sequence valve 603, the cooling liquid fills the annular closed space formed by the inner walls of the inner pipes 1 and 19 cooling bottom plates, flows into the cooling liquid outlet pipe 605 from the cooling liquid circulation outlet one-way valve 604, and is discharged from the outlet pipe connected with the cooling liquid outlet pipe 605, thus completing circulation cooling.
Step two, finishing a heating process: the interference of the outer tube 2 is determined by the positioning block 10. By adjusting the positioning block 10 on the positioning block threaded rod 1004, the positioning block 10 is moved 2mm toward the outside of the inner and outer tube fitting device housing 801, thereby determining the interference of the outer tube 2 by 2mm. Starting the outer tube partition heating module 12, starting the first region 1201, the second region 1202 and the third region 1203 to enable the heating temperatures of the three regions to be T1=250 ℃, observing the indication of the infrared thermometer 9 and the contact condition with the positioning block 10, and entering the next process in time.
Step three, finishing the positioning procedure: after the heating process is completed, the laser aligner 20 is opened, the positions of the middle-layer support base 1306 and the upper-layer base 1307 are adjusted, so that laser passes through the center of the inner tube 1 and the center of the shading film 803 with holes, reaches the micro-motion platform receiving center 21, and the assembly coaxiality is ensured.
Step four, completing a carry procedure: after the above procedure is completed, the pressure at the device inflation inlet 703 entering the inner tube safety speed limiting device 7 is adjusted, so that the friction force between the inflatable annular gasket 702 and the inner tube 1 is reduced, the inner tube 1 starts to slowly descend at a constant speed due to the dead weight and the weight thereon, and after contacting with the arc-shaped curved surface 802, the inner tube enters the inner tube and outer tube matching device shell 801 and passes through the light shielding film 803, at this time, the temperature t1=250 ℃ at the first region 1201, and the second region 1202 and the third region 1203 take t0=200 ℃. The inner tube 1 is further lowered to cooperate with the outer tube 2. When the inner tube 1 is matched with the outer tube 3, the temperature of the first region 1201 and the third region 1203 is reduced to the heat preservation temperature T0=200 ℃ and the temperature of the second region 1202 is increased to T1=250 ℃ after the second region 1202 is axially moved. When the temperature of the first region 1201 and the second region 1202 is decreased to the third region 1203, the temperature of the third region 1203 is increased to 250 ℃. After the inner tube 1 reaches the defined position (i.e., the end of the inner tube 1 is 0.5m from the end of the outer tube 2), the temperatures of the first region 1201, the second region 1202, and the third region 1203 drop to a soak temperature t0=200℃. In the carry process, the operation action is required to be accurately carried out, one-time hot loading is carried out in place, and the descending speed is constant. If abnormality occurs, the pressure of the inflatable ring gasket 702 in the inner pipe safety speed limiting device 7 is rapidly increased to P0, the inner pipe 1 is limited and fixed, and the assembly is performed again after the fault is removed.
Step five, finishing the resetting procedure: after the carry-in procedure is finished, the outer pipe partition heating module 12 is closed, and the inner pipe and the outer pipe are waited for natural cooling. During the carry process, the cooling circulation device 6 descends synchronously, after carry is finished, the liquid inlet of the cooling liquid inlet pipe 601 is closed, and the residual cooling liquid is discharged from the cooling liquid outlet pipe 605 and lifted upwards for reset under the driving of the cooling device lifting motor 18. Similarly, after the matching is finished, the inner tube moving device 4 starts the motor, and moves upwards to reset under the drive of electric power, and waits for the next assembling.
While the invention has been described in detail in connection with specific preferred embodiments thereof, it is not to be construed as limited thereto, but rather as a result of a simple deduction or substitution by a person having ordinary skill in the art to which the invention pertains without departing from the scope of the invention defined by the appended claims.
Claims (10)
1. The hot jacket processing device for the large thin-wall pipe fitting is characterized by being of a vertical and vertical assembly structure and comprising an inner pipe moving device (4), a cooling circulation device (6), a calibration positioning device, an outer pipe partition heating module (12) and an outer pipe micro-motion platform (13);
the inner tube moving device (4) is used for clamping the inner tube (1) and axially placing the inner tube (1) into the outer tube (2) along the outer tube (2);
the cooling circulation device (6) is positioned in the inner pipe (1), the bottom of the cooling circulation device (6) is connected with a cooling baffle plate (19), the cooling baffle plate (19) and the inner wall of the inner pipe (1) form a cooling airtight space, and the cooling circulation device (6) is connected with a lifting mechanism for synchronously moving with the inner pipe (1);
the outer wall of the outer tube (2) is provided with the outer tube partition heating module (12), and the outer tube (2) is arranged on an outer tube micro-motion platform (13); the outer pipe partition heating module (12) is provided with heating sections with temperature controlled respectively along the axial direction of the outer pipe (2) and is used for carrying out sectional heating on the outer pipe (2); the outer tube micro-motion platform (13) is used for adjusting the position of the outer tube (2) in the horizontal X, Y direction so as to be coaxial with the inner tube (1);
the calibration positioning device comprises a laser calibrator (20), an inner pipe and outer pipe matching device (8) and a laser receiving device (21); the inner and outer pipe matching device (8) is positioned between the inner pipe (1) and the outer pipe (2), the inner and outer pipe matching device (8) is a cavity with an upper opening and a lower opening, and the inner side surface of the inner and outer pipe matching device (8) is an arc-shaped curved surface (802) used for limiting and guiding the inner pipe (1) to move so as to reduce the radial deflection of the inner pipe (1); a light shielding film (803) is connected in the cavity, and the light shielding film (803) is provided with a light hole; the laser alignment instrument (20), the laser receiving device (21) and the light hole are all positioned on the central axis of the outer tube (2).
2. The hot jacket processing device for the large thin-walled pipe fitting according to claim 1 is characterized by further comprising a bearing beam (3), wherein the bearing beam (3) is provided with a sliding rail, and the inner pipe moving device (4) is in sliding connection with the sliding rail through a sliding block.
3. The large thin-wall pipe fitting hot jacket processing device according to claim 1, wherein the cooling circulation device (6) comprises a cooling liquid inlet pipe (601) and a cooling liquid outlet pipe, a spray header (602) is connected to the upper portion of the cooling liquid inlet pipe (601), a cooling liquid circulation inlet sequence valve (603) is arranged at the lower portion of the cooling liquid inlet pipe (601), a cooling liquid circulation outlet check valve (604) is arranged at the cooling liquid outlet pipe, the cooling liquid circulation outlet check valve (604) is higher than the cooling liquid circulation inlet sequence valve (603), and the cooling liquid inlet pipe (601) and the cooling liquid outlet pipe are both connected with a cooling baffle plate (19).
4. A large thin-walled pipe fitting hot jacket processing device according to claim 3, characterized in that the lifting mechanism comprises a cooling device lifting motor (18) and a screw (15) connected to the cooling device lifting motor (18), the screw (15) being connected to a cooling liquid outlet pipe.
5. The large thin-wall pipe fitting hot jacket processing device according to claim 1, further comprising an inner pipe descending safety speed limiting device (7), wherein the inner pipe descending safety speed limiting device (7) is located between the inner pipe and outer pipe matching device (8) and the inner pipe (1), the inner pipe descending safety speed limiting device (7) comprises a speed limiting device shell (701), an inflatable annular gasket (702) is arranged on the inner wall of the speed limiting device shell (701), and the inner pipe descending safety speed limiting device is used for controlling friction force between the inner pipe descending safety speed limiting device (7) and the inner pipe (1) by adjusting the inner pressure of the inflatable annular gasket (702), so that the descending speed of the inner pipe (1) is controlled.
6. The large thin-wall pipe fitting hot jacket processing device according to claim 1, wherein an infrared thermometer (9) and a positioning block (10) are arranged on the cavity wall of the inner pipe fitting device (8), and the positioning block (10) is movably connected with the cavity wall and is used for limiting the expansion amount of the outer pipe (2) along the radial movement of the outer pipe (2).
7. The hot jacket processing device for the large thin-wall pipe fitting according to claim 1, wherein the laser gauge (20) is positioned at the center of the bottom of the cooling baffle plate (19), and the laser receiving device (21) is positioned at the center of the inner part of the outer pipe (2) of the outer pipe micro-motion platform (13).
8. The large thin-wall pipe fitting hot jacket processing device according to claim 1, wherein the upper end part of the outer pipe micro-motion platform (13) is a trapezoid boss (1302), the trapezoid boss (1302) is internally supported on the inner wall of the outer pipe (2), the trapezoid boss (1302) is arranged on an upper base (1307), a middle layer supporting seat (1306) is arranged at the bottom of the upper base (1307), and a Y-direction guide rail (1305) is arranged on the upper surface of the middle layer supporting seat (1306); the upper base (1307) is connected on the Y-shaped guide rail (1305) in a sliding way; the bottom of the middle layer supporting seat (1306) is provided with a lower layer base (1304), the upper surface of the lower layer base (1304) is provided with an X-direction guide rail (1303), and the middle layer supporting seat (1306) is connected to the X-direction guide rail (1303) in a sliding way.
9. A hot jacket processing method based on a large thin-walled pipe fitting hot jacket processing apparatus as recited in any of claims 1 to 8, comprising the steps of:
1) The preparation process comprises the following steps: the inner pipe (1) is arranged above the outer pipe (2) through the inner pipe moving device (4), and the outer pipe (2) is positioned in the tunnel; a cooling circulation device (6) positioned inside the inner pipe (1) is started in advance, and in the subsequent carry procedure, the cooling circulation device (6) synchronously and axially moves along with the inner pipe (1);
2) Heating procedure: heating the outer tube (2) by using an outer tube partition heating module (12), and measuring the temperature of the outer tube (2);
3) Positioning procedure: after the required interference is achieved, starting a calibration positioning device, and adjusting an outer tube micro-motion platform (13) for fixing the outer tube, so that laser of the calibration positioning device passes through the center of the inner tube (1) and a light hole of a shading film (803), and the center of the outer tube (2) ensures the assembly coaxiality;
4) Carry procedure: the inner pipe (1) descends at a constant speed under the action of dead weight and heavy objects on the inner pipe, and is assembled with the outer pipe (2) in a hot sleeve manner; according to the axial position of the inner tube (1) moving during matching and the data of the temperature measuring device, adjusting the temperatures of different areas of the outer tube (2) corresponding to the outer tube partition heating module (12);
5) Resetting; after the carry procedure is finished, closing the outer pipe partition heating module (12) and waiting for the inner pipe and the outer pipe to finish natural cooling; and after the carry is finished, closing a liquid inlet of the cooling circulation device (6), and lifting and resetting the cooling circulation device (6) and the inner pipe moving device (4).
10. The hot jacket processing method based on a large thin-wall pipe fitting hot jacket processing device according to claim 9, characterized in that the outer pipe partition heating module (12) is divided into a plurality of heating zones from top to bottom along the axial direction of the outer pipe (2); after the inner tube (1) is contacted with the arc-shaped curved surface (802), the inner tube enters the inner tube and outer tube matching device (8) and enters the inner tube (2) corresponding to a plurality of heating areas along the upper part of the outer tube (2), the heating areas which enter from the end part of the inner tube (1) are correspondingly heated to the temperature of the hot jacket, and the rest heating areas are correspondingly cooled.
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| CN202310667556.5A CN116393915B (en) | 2023-06-07 | 2023-06-07 | Hot jacket processing device and method for large thin-wall pipe fitting |
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| CN116393915B (en) | 2023-09-08 |
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