CN207205614U - A kind of equipment for reducing heat exchanger tube and panel weld residual stress - Google Patents
A kind of equipment for reducing heat exchanger tube and panel weld residual stress Download PDFInfo
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- CN207205614U CN207205614U CN201721049808.4U CN201721049808U CN207205614U CN 207205614 U CN207205614 U CN 207205614U CN 201721049808 U CN201721049808 U CN 201721049808U CN 207205614 U CN207205614 U CN 207205614U
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- 230000007246 mechanism Effects 0.000 claims description 26
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- 230000005540 biological transmission Effects 0.000 claims description 10
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
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- 230000006978 adaptation Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
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- 239000002184 metal Substances 0.000 description 1
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- 239000003208 petroleum Substances 0.000 description 1
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Abstract
The utility model discloses a kind of equipment for reducing heat exchanger tube and panel weld residual stress, including controller, nozzle system and the high-pressure hydraulic pump for nozzle system supply high-pressure water jet, nozzle system includes cut-out governing device and several nozzles, cut-out governing device includes connected shell and end cap, several nozzles are uniform along the cylindrical circumferential direction of shell, and each nozzle is connected with high-pressure hydraulic pump；The equipment also includes driving the Y-direction drive device of the shell and nozzle along the X that X-direction translates to drive device, along Y direction translation and the Z-direction drive device along Z-direction lifting.The utility model reduces the residual stress of the circular weld of the different-diameter of different size heat exchanger using high pressure water jet, applied widely, and it is good to reduce residual stress effect.
Description
Technical Field
The utility model belongs to the technical field of the welding, especially, relate to a reduce heat exchanger pipe and tube sheet welding seam residual stress's equipment.
Background
The heat exchanger is a device for transferring part of heat of hot fluid to cold fluid, and is also called as a heat exchanger. The heat exchanger plays an important role in chemical industry, petroleum industry, power industry, food industry and other industrial production, can be used as a heater, a cooler, a condenser, an evaporator, a reboiler and the like in chemical industry production, and is widely applied. Meanwhile, the failure of the heat exchanger caused by various reasons in the using process of the heat exchanger brings a plurality of serious safety problems to enterprises, and simultaneously causes immeasurable economic loss. It is therefore important to prevent failure of the heater.
The most prominent failure mode of a heat exchanger is the failure of the tube to tube sheet connection. The welding residual stress generated in the process of welding the tube and the tube plate can reach the yield limit of materials sometimes, and provides conditions for stress corrosion cracking. To prevent heat exchanger failure due to this cause, it is desirable to reduce the residual stress of the tube-to-tube plate joint welds.
The method for reducing the welding residual stress by using the high-pressure water jet technology is a new method, and compared with the traditional method, the method has the advantages of good strengthening effect, low cost, no pollution, convenience in realizing automation, easiness in strengthening narrow and deep groove parts and the like.
SUMMERY OF THE UTILITY MODEL
The utility model provides a solve the weak point that above-mentioned prior art exists, provide an adopt high pressure water jet technology to reduce heat exchanger pipe and tube sheet welding seam residual stress's equipment.
The utility model discloses the technical scheme who adopts does:
a device for reducing the residual stress of the welding seam of a heat exchanger tube and a tube plate comprises a controller, a nozzle system and a high-pressure water pump for supplying high-pressure water jet to the nozzle system, wherein the nozzle system comprises a nozzle regulator and a plurality of nozzles, the nozzle regulator comprises a shell and an end cover which are connected, the plurality of nozzles are uniformly distributed along the outer circumference direction of the shell, and each nozzle is connected with the high-pressure water pump; the equipment also comprises an X-direction driving device for driving the shell and the nozzle to translate along the X-axis direction, a Y-direction driving device for translating along the Y-axis direction and a Z-direction driving device for lifting along the Z-axis direction.
The Y-axis driving device comprises a first motor and a first ball screw pair, the first ball screw pair comprises a first screw nut and a first screw which are matched with each other, the first screw is arranged along the Y direction, the first screw nut is sleeved on the outer side of the first screw, the first screw nut is connected with an output shaft of the first motor, and the first motor is connected with the controller; the tail end of the first lead screw is connected with the end cover.
The X-direction driving mechanism comprises a sliding support, a second motor, a gear shaft, a rack and a transverse guide rail paved along the X direction, the second motor is connected with the controller, the first motor is arranged on the sliding support and moves synchronously along with the sliding support, the gear and the rack are in meshed transmission, the rack is paved on the transverse guide rail, the gear is installed on the sliding support through the gear shaft, the gear shaft is connected with an output shaft of the second motor, and the second motor drives the gear to move along the rack, so that the sliding support is driven to move horizontally along the transverse guide rail.
The Z-direction driving mechanism comprises a third motor and a second ball screw pair, the third motor is connected with the controller, the third motor and the second ball screw pair are provided with two sets, one set is located on the left side of the transverse guide rail, the other set is located on the right side of the transverse guide rail, each second ball screw pair comprises a second screw, the two sets of second ball screw pairs further comprise first threaded holes formed in the left end of the transverse guide rail and formed in the right end of the transverse guide rail, the first threaded holes are matched with the second screws, the second screws are connected with output shafts of the third motor, and the third motor drives the second screws to rotate so as to drive the transverse guide rail to lift.
The nozzle regulator also comprises an adjusting mechanism, the adjusting mechanism is arranged in the shell and is used for changing the diameter of the circumference formed by the matching of the plurality of nozzles, namely the circumference of the water jet formed by the spraying of the plurality of nozzles.
The adjusting mechanism comprises a fourth motor, a third ball screw pair, a circular table and nozzle sleeves, the fourth motor is connected with the controller, the third ball screw pair comprises a third screw and a third screw nut matched with the third screw, the third screw nut is sleeved on the outer side of the third screw, an output shaft of the fourth motor is connected with the third screw nut and drives the third screw nut to rotate, one end of the third screw is connected with the circular table, the fourth motor drives the third screw nut to rotate so as to drive the third screw to linearly feed and further drive the circular table to axially slide along the third screw, the outer diameter of the circular table is gradually increased or decreased along the axial direction of the circular table, the number of the nozzle sleeves is equal to that of the nozzles, one nozzle is correspondingly arranged in one nozzle sleeve, one end of each nozzle sleeve extends out of the shell, and the other end of each nozzle sleeve extends into the shell and contacts with the surface of the circular table, the surface of the circular truncated cone is a smooth surface, and the circular truncated cone slides to drive the nozzle sleeve to extend or retract along the shell.
The equipment also comprises an auxiliary positioning device used for assisting in positioning the nozzles, wherein the auxiliary positioning device comprises a laser emitter, the laser emitter is arranged on the shell, and laser beams emitted by the laser emitter and water jets emitted by the nozzles are positioned on the same circumference.
The nozzle system also includes a rotational drive mechanism for rotating the housing and the nozzle.
The rotary driving mechanism comprises a connector, a first connecting pipe, a fifth motor, a rotary joint and a gear meshing transmission assembly, the connector is arranged in the shell, the tail end of each nozzle is communicated with the connector, the connector is communicated with the first connecting pipe, the first connecting pipe is connected with the rotary joint, the fifth motor is connected with the controller, the tail end of the shell is inserted into the end cover, a first rotary chute matched with the tail end of the shell is formed in the end cover, the rotary joint is arranged in the center of the end cover, a second rotary chute matched with the rotary joint is formed in the center of the end cover, the fifth motor is connected with the controller, the gear meshing transmission assembly comprises an inner gear and an outer gear, an output shaft of the fifth motor is connected with the outer gear, the outer gear is arranged on the inner side of the inner gear and meshed with the inner gear, and the outer contour of the inner gear is fixedly, the output shaft of the fifth motor rotates and drives the outer shell and the nozzle to rotate through the inner gear and the outer gear.
Since the technical scheme is used, the utility model discloses the beneficial effect who gains does:
1. the utility model discloses can adjust the relative position between nozzle and the welding seam in a flexible way under X to, Y to and Z to drive arrangement's effect to the demand that adapts to the residual stress who reduces the heat exchanger pipe of different specifications and tube sheet welding seam has avoided the remodelling of equipment, has enlarged the application scope of equipment.
2. The utility model provides a nozzle can rotate in a flexible way under rotary driving mechanism's effect, makes the circumferential weld can receive the even impact of high-pressure water jet, and the inside residual stress of welding seam reduces effectually.
3. The utility model discloses the diameter of the circumference that well each nozzle encloses is adjustable to the demand of the circumferential weld of adaptation different diameters, and the relative position of laser beam as referring to auxiliary positioning nozzle and circumferential weld that utilizes laser emitter transmission has further improved the accuracy of location, has improved the effect that reduces residual stress.
4. The utility model discloses can realize closed-loop control, the flexible operation is flexible, can be used to reduce the residual stress of multiple circumferential weld (like linear type welding seam, fillet weld etc.). And, utilize the utility model provides an equipment sprays welding seam on the high pressure water jet processing heat exchanger, can make welding seam area surface equivalent plastic strain increase, and high pressure water jet processing effect exists the metal weld seam of residual tensile stress on the surface in inside, and the huge impact compressive stress that it carried produces sufficient plastic deformation on the material top layer, makes residual stress obtain relaxing. In addition, the residual stress of the surface of the welding seam and the heat affected zone of the workpiece treated by the high-pressure water jet is greatly reduced, the compressive stress is generated in the welding seam zone, and the expansion of cracks initiated by a fatigue source is effectively controlled.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Figure 2 is a schematic view of the working conditions when the stress on the weld joints of the tubes and the tube sheets of the heat exchanger is reduced.
Fig. 3 is a right side view of fig. 2.
Fig. 4 is a half-sectional view of the nozzle regulator of the present invention.
Wherein,
1. the device comprises a bottom plate 2, a water supply pipe 3, a base 4, a second lead screw 5, a nozzle 6, a laser emitter 7, a nozzle regulator 8, a guide post 9, a third motor 10, a first lead screw nut 11, a first motor 12, a controller 13, a first lead screw 14, a gear 15, a rack 16, a high-pressure water pump 17, a water inlet 18, a water outlet 19, a pipe 20, a welding seam 21, a pipe plate 22, a third lead screw 23, a fourth motor 24, a shell 25, a transverse guide rail 26, a three-phase connector 27, a fifth motor 28, a sliding support 29, a second connecting pipe 30, a rotary joint 31, an end cover 32, a first connecting pipe 33, a circular table 34, a nozzle connecting pipe 35, a second motor 36, a third lead screw nut 37, an internal gear 38 and an external
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific embodiments, but the present invention is not limited to these embodiments.
As shown in fig. 1 to 4, an apparatus for reducing residual stress in a weld of a tube and a tube sheet of a heat exchanger includes a controller 12, a nozzle system, and a high pressure water pump 16 for supplying a high pressure water jet to the nozzle system. The controller 12 is used for controlling the operation of the following motors to achieve the purpose of controlling the whole equipment, the following motors are connected with the controller 12 through lines, and the controller 12 issues instructions to realize the whole process of reducing the residual stress of the welding seam.
The nozzle system comprises a nozzle regulator 7 and three nozzles 5, wherein the nozzle regulator 7 comprises a shell 24 and an end cover 31 which are connected, and the three nozzles 5 are uniformly distributed along the outer circumference direction of the shell 24 at included angles of 120 degrees.
To accommodate the need for circumferential welds 20 of different diameters between different tubes 19 and tube sheets 21, the nozzle regulator 7 further includes an adjustment mechanism disposed within the housing 24 for varying the diameter of the circumference formed by the three nozzles 5 in cooperation.
Specifically, the adjustment mechanism includes a fourth motor 23, a third ball screw pair, a circular table 33, and a nozzle sleeve 34. The fourth motor 23 is connected to the controller 12, the third ball screw assembly includes a third screw 22 and a third screw nut 36 adapted to the third screw 22, the third screw nut 36 is sleeved on the outer side of the third screw 22, and an output shaft of the fourth motor 23 is connected to the third screw nut 36 and drives the third screw nut 36 to rotate. The third lead screw 22 is connected with the circular truncated cone 33, and the fourth motor 23 drives the third lead screw nut 36 to rotate, so as to drive the third lead screw 33 to realize linear feeding motion, and further drive the circular truncated cone 33 to axially slide along the third lead screw 22. The circular truncated cone 33 is a geometric body surrounded by curved surfaces formed by rotating the remaining sides with a straight line where a waist of a right trapezoid is perpendicular to the base side as a rotation axis. Therefore, the outer diameter of the circular truncated cone 33 is gradually increased or decreased in the axial direction thereof. The number of the nozzle sleeves 34 is three, one nozzle 5 is correspondingly arranged in one nozzle sleeve 34, one end of each nozzle sleeve 34 extends out of the outer shell 24, and the other end of each nozzle sleeve 34 extends into the outer shell 24 and is in contact with the surface of the circular truncated cone 33. The surface of the circular truncated cone 33 is smooth, and when the circular truncated cone 33 is fed axially, the circular truncated cone 33 can drive the nozzle sleeve 34 to extend or retract along a positioning hole formed in the shell 24 and through which the nozzle sleeve 34 passes, so that the nozzle 5 is driven to extend or retract along the positioning hole, and the change of the diameter of the spraying circumference surrounded by the three nozzles 5 is realized.
Of course, the number of the nozzles 5 in the present invention is not limited to the three nozzles, and can be set more than three, as long as it can be uniformly distributed in the circumferential direction of the housing 24 and can be extended or retracted along the positioning holes.
In order to enable the circumferential weld 20 to be uniformly impacted by the high-pressure water jet, the nozzle system further comprises a rotational drive mechanism for rotating the nozzle system. The rotary driving mechanism comprises a connector, a first connecting pipe 32, a fifth motor 27, a rotary joint 30 and a gear meshing transmission assembly. When the nozzles 5 are three, the connectors are three-phase connectors 26, the three-phase connectors 26 are arranged in the shell 24, the tail ends of the nozzles 5 are communicated with the three-phase connectors 26, the three-phase connectors 26 are communicated with a first connecting pipe 32, the first connecting pipe 32 is connected with a rotary connector 30, and a fifth motor 27 is connected with the controller 12. The end of the shell 24 is inserted into the end cover 31, and the end cover 31 is provided with a first rotating chute matched with the end of the shell 24, the rotating joint 30 is arranged at the center of the end cover 31, and a second rotary chute matched with the rotary joint 30 is arranged at the central position of the end cover 31, the gear engagement transmission assembly includes an internal gear 37 and an external gear 38, an output shaft of the fifth motor 27 is connected to the external gear 38, the external gear 38 is disposed inside the internal gear 37 and engages with the internal gear 37, thereby driving the internal gear to rotate, the external profile of the internal gear 37 is fixedly connected with the inner wall of the shell 24, the fifth motor 27 drives the shell 24 and the nozzle 5 to rotate through the internal gear and the external gear, in the process of jetting water jet, the rotation of the three nozzles 5 causes the circumferential weld 20 to be uniformly impacted by the high-pressure water jets, so as to achieve the effect of uniformly reducing the residual stress inside the weld.
The high-pressure water pump 16 is arranged on the bottom plate 1, and the high-pressure water pump 16 supplies high-pressure water jets to the nozzles 5. The high-pressure water pump 16 is provided with a water inlet 17 and a water outlet 18, the water inlet 17 is externally connected with a water source, and the water outlet 18 supplies high-pressure water jet to the nozzles 5 through water pipelines. The water pipe includes a water supply pipe 2 and a second connection pipe 29, one end of the water supply pipe 2 is communicated with the water outlet 18 of the high pressure water pump 16, the other end is communicated with the second connection pipe 29, and the second connection pipe 29 is communicated with the first connection pipe 32. Therefore, the high-pressure water enters the nozzle 5 through the high-pressure water pump 16, the water supply pipe 2, the second connection pipe 29, the first connection pipe 32, and the three-phase connection head 26 in this order, and is discharged from the nozzle 5.
In order to adapt to the requirement of the reduction residual stress of the welding seam 20 between the heat exchanger tubes 19 and the tube plate 21 of different specifications, the relative position between the nozzle 5 and the welding seam 20 needs to be accurately adjusted, therefore the utility model provides an equipment is still including the triaxial linkage system that is used for adjusting the relative position between the nozzle 5 and the welding seam 20, and this triaxial linkage system is including driving shell 24 and nozzle 5 are along the X of X axle direction translation to drive arrangement, along the Y of Y axle direction translation to drive arrangement and along the Z of Z axle direction lift to drive arrangement. The X direction is horizontal in the common sense, the Y direction is longitudinal, and the Z direction is vertical.
Specifically, the Y-axis driving device includes a first motor 11 and a first ball screw pair, the first ball screw pair includes a first screw nut 10 and a first screw 13 that are matched with each other, the first screw 13 is disposed along the Y direction, the first screw nut 10 is sleeved outside the first screw 13, the first screw nut 10 is connected to an output shaft of the first motor 11, and the first motor 11 is connected to the controller 12. The end cap 31 is connected to the end of the first lead screw 13. The first motor 11 drives the first lead screw nut 10 to rotate, and further drives the first lead screw 13 to feed along the Y direction, so that the end cover 31 is driven to feed along the Y direction, and the nozzle system is moved along the Y direction.
The X-direction driving mechanism comprises a sliding bracket 28, a second motor 35, a gear 14, a gear shaft, a rack 15 and a transverse guide track 255 laid along the X direction. The second motor 35 is connected to the controller 12, and the first motor 11 is disposed on the sliding bracket 28 and moves synchronously with the sliding bracket 28. The gear 14 is in meshed transmission with the rack 15, the rack 15 is laid on the transverse guide rail 25, the gear 14 is installed on the sliding support 28 through a gear shaft, the gear shaft is connected with an output shaft of the second motor 35, the second motor 35 drives the gear 14 to move along the rack 15, and therefore the sliding support 28 is driven to move horizontally along the transverse guide rail 25, and the nozzle system is moved along the X direction.
The Z-direction drive mechanism includes a third motor 9 and a second ball screw pair. The third motor 9 is connected with the controller 12, and the third motor 9 and the second ball screw pair are provided with two sets, wherein one set is positioned on the left side of the transverse guide rail 25, and the other set is positioned on the right side of the transverse guide rail 25. And two sides of the top end surface of the bottom plate 1 are provided with bases 3 for mounting a third motor 9. Each second ball screw pair comprises a second screw 4, the two second ball screw pairs further comprise first threaded holes formed in the left end of the transverse guide rail 25 and in the right end of the transverse guide rail 25, the first threaded holes are matched with the second screw 4, the second screw 4 is connected with an output shaft of the third motor 9, the third motor 9 drives the second screw 4 to rotate, the transverse guide rail 25 is driven to ascend and descend, and the nozzle system is moved in the Z direction. The equipment further comprises a lifting guide mechanism, the lifting guide mechanism comprises guide columns 8 respectively arranged on the left side and the right side of the transverse guide rail 25, and the left side and the right side of the transverse guide rail 25 are respectively sleeved on the guide columns 8.
The equipment further comprises an auxiliary positioning device for auxiliary positioning of the positions of the nozzles, the auxiliary positioning device comprises a laser emitter 6, the laser emitter 6 is arranged on the shell 24, a laser beam emitted by the laser emitter 6 and water jets emitted by the nozzles 5 are positioned on the same circumference, specifically, one end of the laser emitter 6 extends into the shell 24 and is in contact with the circular truncated cone 33, the other end of the laser emitter 6 extends out of the shell 24 and surrounds the nozzles 5 to form a circumference, the circular truncated cone 33 moves to realize synchronous feeding of the laser emitter 6 and the nozzles 5, the laser beam emitted by the laser emitter 6 and the water jets emitted by the nozzles 5 are matched together to form a cylindrical surrounding ring, and after the nozzles 5 finish coarse positioning through the three-axis linkage system, fine adjustment of the relative positions between the nozzles 5 and the welding seam 20 is carried out by taking the laser beam emitted by the laser emitter 6 as a reference, so as to realize accurate positioning.
In the practical application process, a worker operates the controller 12, firstly, the distance between the nozzles 5 and the welding seam 20 is adjusted through the three-axis linkage system, then, the diameters of the circumferences of the three nozzles 5 are adjusted through the adjusting mechanism, and the whole positioning process is assisted by taking laser beams emitted by the laser emitter 6 as reference. After the positioning work is finished, the controller 12 issues an instruction, the fifth motor 27 operates and drives the whole nozzle system to operate, and after the nozzle system rotates for 3-5 times, the fifth motor 27 stops operating; the nozzle system is then switched to the next girth weld 20 using the three axis linkage system and adjustment mechanism described above, and the cycle is repeated until the residual stress reduction operation for the last girth weld is completed. The whole process can be completed through the controller 12, the automation degree is high, and the positioning is accurate.
The parts not mentioned in the utility model can be realized by adopting or using the prior art for reference.
Furthermore, the terms "first," "second," "third," "fourth," and "fifth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (9)
1. The equipment for reducing the residual stress of the welding seam of the tube and the tube plate of the heat exchanger is characterized by comprising a controller, a nozzle system and a high-pressure water pump for supplying high-pressure water jet to the nozzle system, wherein the nozzle system comprises a nozzle regulator and a plurality of nozzles, the nozzle regulator comprises a shell and an end cover which are connected, the plurality of nozzles are uniformly distributed along the outer circumferential direction of the shell, and each nozzle is connected with the high-pressure water pump; the equipment also comprises an X-direction driving device for driving the shell and the nozzle to translate along the X-axis direction, a Y-direction driving device for translating along the Y-axis direction and a Z-direction driving device for lifting along the Z-axis direction.
2. The device for reducing the residual stress of the welding seam of the tube and the tube plate of the heat exchanger according to claim 1, wherein the Y-axis driving device comprises a first motor and a first ball screw pair, the first ball screw pair comprises a first screw nut and a first screw which are mutually matched, the first screw is arranged along the Y direction, the first screw nut is sleeved on the outer side of the first screw, the first screw nut is connected with an output shaft of the first motor, and the first motor is connected with the controller; the tail end of the first lead screw is connected with the end cover.
3. The apparatus according to claim 2, wherein the X-direction driving mechanism comprises a sliding bracket, a second motor, a gear shaft, a rack, and a transverse rail arranged along the X-direction, the second motor is connected to the controller, the first motor is disposed on the sliding bracket and moves synchronously with the sliding bracket, the gear is in mesh transmission with the rack, the rack is arranged on the transverse rail, the gear is mounted on the sliding bracket through the gear shaft, the gear shaft is connected to an output shaft of the second motor, and the second motor drives the gear to move along the rack, so as to drive the sliding bracket to move horizontally along the transverse rail.
4. The device for reducing the residual stress of the welding seam of the tube and the tube plate of the heat exchanger according to claim 3, wherein the Z-direction driving mechanism comprises a third motor and two sets of second ball screw pairs, the third motor is connected with the controller, one set of the third motor and two sets of the second ball screw pairs are respectively arranged on the left side of the transverse guide rail and the other set of the third motor and the second ball screw pairs are respectively arranged on the right side of the transverse guide rail, each second ball screw pair comprises a second screw, the two sets of the second ball screw pairs further comprise first threaded holes which are arranged at the left end of the transverse guide rail and at the right end of the transverse guide rail, the first threaded holes are matched with the second screws, the second screws are connected with output shafts of the third motor, and the third motor drives the second screws to rotate so as to drive the transverse guide rail to lift.
5. The apparatus for reducing the residual stress of the weld joint between the tube and the tube plate of the heat exchanger according to claim 1, wherein the nozzle regulator further comprises an adjusting mechanism, the adjusting mechanism is arranged in the shell, and the adjusting mechanism is used for changing the diameter size of the circumference formed by the matching of the plurality of nozzles, namely, the size of the circumference of the water jet formed by spraying the plurality of nozzles.
6. The apparatus according to claim 5, wherein the adjusting mechanism comprises a fourth motor, a third ball screw assembly, a circular table and a nozzle sleeve, the fourth motor is connected to the controller, the third ball screw assembly comprises a third screw and a third screw nut matched with the third screw, the third screw nut is sleeved outside the third screw, an output shaft of the fourth motor is connected to the third screw nut and drives the third screw nut to rotate, one end of the third screw is connected to the circular table, the fourth motor drives the third screw nut to rotate, so as to drive the third screw to linearly feed, further drive the circular table to slide along the axial direction of the third screw, the outer diameter of the circular table is gradually increased or decreased along the axial direction, the number of the nozzle sleeves is equal to that of the nozzles, and a nozzle is correspondingly installed in one nozzle sleeve, one end of each nozzle sleeve extends out of the outer shell, the other end of each nozzle sleeve extends into the outer shell and contacts with the surface of the circular truncated cone, the surface of the circular truncated cone is a smooth surface, and the circular truncated cone slides to drive the nozzle sleeves to extend out or retract along the outer shell.
7. The apparatus for reducing the residual stress of the weld joint between the tube and the tube plate of the heat exchanger according to claim 1, wherein the apparatus further comprises an auxiliary positioning device for auxiliary positioning of the nozzle, the auxiliary positioning device comprises a laser emitter, the laser emitter is arranged on the shell, and the laser beam emitted by the laser emitter and the water jet emitted by each nozzle are positioned on the same circumference.
8. The apparatus of claim 1, wherein the nozzle system further comprises a rotational drive mechanism for rotating the housing and nozzle.
9. The apparatus according to claim 8, wherein the rotation driving mechanism comprises a connector, a first connecting pipe, a fifth motor, a rotary joint and a gear engagement transmission assembly, the connector is disposed in the housing, the end of each nozzle is connected to the connector, the connector is connected to the first connecting pipe, the first connecting pipe is connected to the rotary joint, the fifth motor is connected to the controller, the end of the housing is inserted into the end cap, the end cap is provided with a first rotary chute adapted to the end of the housing, the rotary joint is disposed in the center of the end cap, the center of the end cap is provided with a second rotary chute adapted to the rotary joint, the fifth motor is connected to the controller, the gear engagement transmission assembly comprises an inner gear and an outer gear, and the output shaft of the fifth motor is connected to the outer gear, the outer gear is arranged on the inner side of the inner gear and meshed with the inner gear, the outer contour of the inner gear is fixedly connected with the inner wall of the shell, and the output shaft of the fifth motor rotates and drives the shell and the nozzle to rotate through the inner gear and the outer gear.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721049808.4U CN207205614U (en) | 2017-08-22 | 2017-08-22 | A kind of equipment for reducing heat exchanger tube and panel weld residual stress |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721049808.4U CN207205614U (en) | 2017-08-22 | 2017-08-22 | A kind of equipment for reducing heat exchanger tube and panel weld residual stress |
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| CN207205614U true CN207205614U (en) | 2018-04-10 |
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| CN201721049808.4U Active CN207205614U (en) | 2017-08-22 | 2017-08-22 | A kind of equipment for reducing heat exchanger tube and panel weld residual stress |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107511610A (en) * | 2017-08-22 | 2017-12-26 | 山东科技大学 | A kind of equipment for reducing heat exchanger tube and panel weld residual stress |
| CN110102948A (en) * | 2019-06-17 | 2019-08-09 | 安徽机电职业技术学院 | Full-automatic Tube-sheet Welding tooling platform |
| CN112238299A (en) * | 2020-09-16 | 2021-01-19 | 郑爱兵 | Laser coding machine capable of adjusting coding position and operation method thereof |
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2017
- 2017-08-22 CN CN201721049808.4U patent/CN207205614U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107511610A (en) * | 2017-08-22 | 2017-12-26 | 山东科技大学 | A kind of equipment for reducing heat exchanger tube and panel weld residual stress |
| CN107511610B (en) * | 2017-08-22 | 2022-03-25 | 山东科技大学 | Equipment for reducing residual stress of welding seam of tube and tube plate of heat exchanger |
| CN110102948A (en) * | 2019-06-17 | 2019-08-09 | 安徽机电职业技术学院 | Full-automatic Tube-sheet Welding tooling platform |
| CN112238299A (en) * | 2020-09-16 | 2021-01-19 | 郑爱兵 | Laser coding machine capable of adjusting coding position and operation method thereof |
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