CN111531276A - Vacuum-pumping welding device and method for pressure container - Google Patents

Vacuum-pumping welding device and method for pressure container Download PDF

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Publication number
CN111531276A
CN111531276A CN202010486849.XA CN202010486849A CN111531276A CN 111531276 A CN111531276 A CN 111531276A CN 202010486849 A CN202010486849 A CN 202010486849A CN 111531276 A CN111531276 A CN 111531276A
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China
Prior art keywords
pressure container
vacuum
driving
welding
placing cavity
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Pending
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CN202010486849.XA
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Chinese (zh)
Inventor
曹勇
罗震
张苏娟
李亚洲
张培银
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Thermos Jiangsu Housewares Co Ltd
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Compton Jiangsu Technology Co Ltd
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Priority to CN202010486849.XA priority Critical patent/CN111531276A/en
Publication of CN111531276A publication Critical patent/CN111531276A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/206—Laser sealing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/70—Auxiliary operations or equipment
    • B23K26/702—Auxiliary equipment

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Laser Beam Processing (AREA)

Abstract

The invention discloses a pressure container vacuumizing welding device and a pressure container vacuumizing welding method, wherein the pressure container vacuumizing welding device comprises a rack, a placing cabin which is arranged on the rack and is provided with a placing cavity, a pressure container clamp which is arranged in the placing cavity, a vacuumizing mechanism which is communicated with the placing cavity, and a laser welding machine which is arranged on the rack and is used for carrying out sealing welding on a pressure container. The pressure container clamp comprises a lower claw disc arranged in the placing cavity, a first driving motor used for driving the lower claw disc to rotate, an upper claw disc which can be arranged in the placing cavity in a rotating mode along the axis direction of the upper claw disc, and a driving assembly used for driving the upper claw disc to move towards the direction close to or away from the lower claw disc. The vacuum-pumping welding device for the pressure container, disclosed by the invention, has the advantages of simple structure, simple vacuum-pumping welding process for the pressure container, low cost and good sealing welding effect. The vacuum pumping welding method for the pressure container has the advantages of simple vacuum pumping welding step for the pressure container and good sealing welding effect.

Description

Vacuum-pumping welding device and method for pressure container
Technical Field
The invention relates to the field of vacuum pumping welding of pressure vessels, in particular to a vacuum pumping welding device and a vacuum pumping welding method for a pressure vessel.
Background
The vacuum pumping sealing process of the metal part pressure container in the current market mainly comprises three types: tailed sealing and tailless sealing.
The tail sealing is that the bottom of the pressure container is provided with a tail hiding chamber after the pressure container is vacuumized, and a small tail is arranged in the tail hiding chamber.
The tailless vacuum adopts a 'melt sealing technology', a small glass is placed beside a hole for pumping air at the bottom of the pressure container, the pressure container is placed in a sealed environment, the sealed environment is pumped into vacuum, the space is heated in the vacuum pumping process, after the vacuum pumping is carried out to a certain value, the heating temperature is also set to the value of glass melting, the hole at the bottom of the pressure container is sealed through the glass melting, so that the internal vacuum degree of the pressure container is reached, and the process ensures that a copper pipe with a tail cannot be left at the bottom of the pressure container. However, the tailless vacuum sealing method has high processing cost, and if the pressure container is knocked down in the using process, the sealed glass is easily broken, so that the vacuum environment is damaged, and the heat insulation effect of the pressure container is lost.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the vacuum-pumping welding device for the pressure container, which has the advantages of simple structure, simple vacuum-pumping welding process for the pressure container, low cost and good sealing welding effect.
In order to achieve the purpose, the invention adopts the technical scheme that: a kind of pressure vessel vacuumizes the welding set, including the stander, locate the placing cabin with placing cavity on the said stander, locate the pressure vessel clamp in said placing cavity, vacuumize the organization in connection with said placing cavity, locate and use for carrying on the laser welding machine of the sealed welding machine to the pressure vessel on the said stander, the said placing cabin includes the cabin body with said placing cavity, the said placing cavity has openings communicated with outside, the said placing cabin also includes the hatch door cooperating with said opening, is used for sealing the said hatch door and compacting the sealed actuating mechanism in the said opening department; the pressure container clamp comprises a lower claw disc arranged in a placing cavity, a first driving motor used for driving the lower claw disc to rotate, an upper claw disc which can be arranged in the placing cavity in a rotating mode along the axis direction of the pressure container clamp and is located on the upper side of the lower claw disc, and a driving assembly used for driving the upper claw disc to move towards the direction close to or away from the lower claw disc, wherein the first driving motor and the driving assembly are arranged in a sealing mode with the placing cavity.
Preferably, the driving assembly comprises a lead screw arranged along the vertical direction, a second driving motor used for driving the lead screw to rotate, a rolling shaft matched with the lead screw, a guide post arranged in the placing cavity and parallel to the lead screw, and a sliding plate sleeved on the guide post in a sliding manner, wherein the rolling shaft is fixed with the sliding plate, and the upper claw disc can be rotatably arranged on the sliding plate along the axis direction of the upper claw disc.
Preferably, the placing cabin further comprises a sliding rail arranged at the opening, a sliding groove matched with the sliding rail is formed in the cabin door, and the sealing driving mechanism comprises a first driving cylinder used for driving the cabin door to reciprocate along the sliding rail.
Furthermore, the cabin door comprises a front end cover provided with the sliding groove, a sealing cover which is arranged on the front end cover in a sliding mode and can move towards or away from the opening direction, and the sealing driving mechanism further comprises a second driving cylinder which is used for driving the sealing cover to move towards or away from the opening direction.
Further, the cabin door further comprises a guide mechanism for guiding the movement of the sealing cover, and the guide mechanism comprises a guide hole formed in the front end cover and a guide post fixed on the sealing cover and matched with the guide hole.
Preferably, the vacuum pumping mechanism comprises a low vacuum obtaining module communicated with the placing cavity and a high vacuum obtaining module communicated with the placing cavity.
Further, the rough acquisition module includes a gas delivery vacuum pump and the fine acquisition module includes a gas capture vacuum pump.
Preferably, the vacuumizing welding device further comprises a laser welding machine adjusting mechanism arranged on the rack, the laser welding machine is fixed on the laser welding machine adjusting mechanism, and the laser welding machine adjusting mechanism comprises a transverse adjusting part, a longitudinal adjusting part and a vertical adjusting part.
Further, the laser welding machine includes the laser head, cabin side wall has seted up the laser head and has stretched into the hole, the laser head passes through the laser head stretches into the hole and stretches into place the intracavity, the laser head with the laser head stretches into the hole and adopts the flexible welding bellows to connect, be equipped with sealed lens in the laser head.
The invention also aims to provide a vacuum-pumping welding method for the pressure container, which has simple vacuum-pumping welding steps and good sealing welding effect.
In order to achieve the purpose, the invention adopts the technical scheme that: a vacuum-pumping welding method for a pressure container is characterized by comprising the following steps: the pressure container vacuumizing welding device comprises the pressure container vacuumizing welding device and a pressure container to be welded, wherein the pressure container comprises a pressure container body and a pressure container bottom, the pressure container body comprises an outer tire and an inner tire, one end of the outer tire is connected with one end of the inner tire, an open interlayer is arranged between the outer tire and the inner tire, the end part of the pressure container bottom is matched with the other end part of the outer tire to form an annular gap to be welded, and the pressure container vacuumizing welding method comprises the following steps:
step 1: opening the hatch door, clamping the pressure container body on the lower claw disc, and clamping the pressure container bottom on the upper claw disc;
step 2: driving the sealing driving mechanism to drive the cabin door to seal the placing cavity;
and step 3: driving the low vacuum obtaining module to perform low vacuum pumping treatment on the placing cavity;
and 4, step 4: driving the high vacuum obtaining module to perform high vacuum pumping treatment on the placing cavity;
and 5: the driving component is driven to drive the upper claw disc to move downwards, so that the bottom of the pressure container is pressed on the pressure container body, the end part of the bottom of the pressure container is matched with the other end part of the outer tire to form an annular gap 73 to be welded
Step 6: adjusting the adjusting mechanism of the laser welding machine to enable a light outlet of the laser welding machine to be directly opposite to the gap to be welded;
and 7: and driving the first driving motor to drive the lower claw disc to rotate, driving the pressure container body and the container bottom to synchronously rotate, and driving the laser welding machine to weld the to-be-welded seam, so that a vacuum sealing interlayer is formed among the outer tire, the inner tire and the pressure container bottom.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: the vacuum-pumping welding device and the vacuum-pumping welding method for the pressure container can directly vacuum the pressure container body and the bottom of the pressure container in the placing cavity and directly weld the pressure container body and the bottom of the pressure container. The vacuum pumping welding device for the pressure container has the advantages of simple structure, simple vacuum pumping welding process for the pressure container, low cost, good sealing welding effect and high stability. The vacuum pumping welding method for the pressure container has the advantages of simple vacuum pumping welding step, good sealing welding effect, high welding seam stability and difficult damage. The complex steps of firstly forming a gap at the bottom of the pressure container, then welding the pressure container body of the pressure container and the bottom of the pressure container, then vacuumizing the interior of the pressure container, and finally welding the gap formed at the bottom of the pressure container are avoided.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a schematic view of the three-dimensional structure of the present invention with the frame removed;
FIG. 3 is an enlarged view of a portion A of FIG. 2;
FIG. 4 is a schematic structural view of the placing chamber, the pressure vessel clamp and the vacuum pumping mechanism of the present invention;
FIG. 5 is a perspective view of the placing cabin, a pressure vessel clamp and a vacuum pumping mechanism of the invention;
FIG. 6 is a schematic view of a first construction of a pressure vessel;
FIG. 7 is an enlarged view of a portion B of FIG. 6;
FIG. 8 is a schematic diagram of a second construction of the pressure vessel;
FIG. 9 is an enlarged view of a portion C of FIG. 8;
FIG. 10 is a schematic view of a third construction of a pressure vessel;
FIG. 11 is an enlarged view of a portion D of FIG. 10;
wherein: 1. a frame; 2. a placing cabin; 21. a placement chamber; 211. an opening; 22. a cabin body; 221. a laser head is inserted into the hole; 23. a cabin door; 231. a front end cover; 232. a sealing cover; 233. a guide mechanism; 2331. a guide hole; 2332. a guide post; 24. a seal driving mechanism; 241. a first driving cylinder; 242. a second driving cylinder; 25. a slide rail; 3. a pressure vessel clamp; 31. a lower jaw plate; 32. a first drive motor; 33. an upper jaw plate; 34. a drive assembly; 341. a lead screw; 342. a second drive motor; 343. a guide post; 344. a slide plate; 4. a vacuum pumping mechanism; 41. a low vacuum acquisition module; 42. a high vacuum acquisition module; 5. laser welding machine; 51. a laser head; 6. a laser welder adjustment mechanism; 61. a lateral adjustment section; 62. a longitudinal adjustment section; 63. a vertical adjustment section; 7. a pressure vessel; 71. a pressure vessel body; 711. an outer tire; 712. an inner tube; 713. an interlayer; 72. the bottom of the pressure vessel; 73. a gap to be welded; 74. and a limiting bulge.
Detailed Description
The technical solution of the present invention is further explained with reference to the drawings and the specific embodiments.
Referring to the attached drawings 1 to 5, the vacuum pumping welding device for the pressure container comprises a rack 1, a placing cabin 2 which is arranged on the rack 1 and provided with a placing cavity 21, a pressure container clamp 3 which is arranged in the placing cavity 21, a vacuum pumping mechanism 4 which is communicated with the placing cavity 21, and a laser welding machine 5 which is arranged on the rack 1 and used for sealing and welding a pressure container 7.
The placing cabin 2 comprises a cabin body 22 with a placing cavity 21, the placing cavity 21 is provided with an opening 211 communicated with the outside, the opening 211 of the placing cavity 21 is positioned on the side surface, the top surface or the bottom surface of the cabin body 22, the placing cabin 2 further comprises a cabin door 23 matched with the cavity opening 211, and a sealing driving mechanism 24 used for sealing and pressing the cabin door 23 at the opening 211.
The placing cavity opening 211 is provided with a sliding rail 25, the cabin door 23 is provided with a sliding chute matched with the sliding rail 25, and the sealing driving mechanism 24 comprises a first driving cylinder 241 for driving the cabin door 23 to reciprocate along the sliding rail 25. The cylinder body of the first driving cylinder 241 is fixed on the frame 1, and the piston rod is fixed on the hatch 23. The hatch 23 can be controlled to move to or away from the opening 211 by the first driving cylinder 241.
Preferably, the hatch 23 includes a front cover 231 having a sliding slot, and a sealing cover 232 slidably disposed on the front cover 231 and capable of moving toward or away from the opening 211. The seal driving mechanism 24 further includes a second driving cylinder 242 for driving the seal cap 232 to move toward or away from the opening 211 of the placing chamber. Preferably, the cylinder body of the second driving cylinder 242 is fixed to the front cover 231, and the piston rod is fixed to the sealing cover 232. After the first driving cylinder 241 controls the cabin door 23 to move to the placing cavity opening 211, the second driving cylinder 242 drives the sealing cover 232 to move towards the direction close to the placing cavity opening 211, so that the sealing cover 232 is tightly pressed at the placing cavity opening 211 to achieve the sealing effect. In order to enhance the sealing effect, a sealing ring is arranged around the opening 211 of the placing cavity.
The hatch 23 further includes a guide mechanism 233 for guiding the movement of the sealing cover 232 so that the sealing cover 232 can be stably reciprocated. The guide mechanism 233 includes a guide hole 2331 formed in the front cover 231 and a guide post 2332 fixed to the sealing cover 232 to be fitted into the guide hole 2331. Preferably, a plurality of guide mechanisms 233 are provided, the plurality of guide mechanisms 233 are provided around the front cover 231, and the second driving cylinder 242 is provided in the middle of the plurality of guide mechanisms 234. The guide mechanism 233 illustrated in this embodiment is an example, and any guide mechanism 233 that can guide the movement of the sealing cover 232 is within the scope of the present application.
The pressure container clamp 3 comprises a lower claw disc 31 arranged in the placing cavity 21, a first driving motor 32 used for driving the lower claw disc 31 to rotate, an upper claw disc 33 which is arranged in the placing cavity 21 and is positioned on the upper side of the lower claw disc 31 in a rotating mode along the axis direction of the pressure container clamp, a driving assembly 34 used for driving the upper claw disc 33 to move towards the direction close to or away from the lower claw disc 31, a lower claw disc driving mechanism used for driving the lower claw disc 31 to clamp or release, and an upper claw disc driving mechanism used for driving the upper claw disc 33 to clamp or release, wherein the first driving motor 32 and the driving assembly 34 are arranged in a sealing mode with the placing cavity 21.
In this embodiment, the driving assembly 34 includes a screw 341 arranged along the vertical direction, a second driving motor 342 for driving the screw 341 to rotate, a roller cooperating with the screw 341, a plurality of limiting posts 343 arranged in the placing cavity 21 and parallel to the screw 341, and a sliding plate 344 slidably sleeved on the plurality of limiting posts 343, the sliding plate 344 is fixed to the roller, the upper jaw plate 33 can be arranged on the sliding plate 344 along the axial direction thereof, and the second driving motor 342 drives the screw 341 to rotate, thereby driving the upper jaw plate 33 to move up and down.
The vacuum-pumping mechanism 4 in the present embodiment includes a low vacuum obtaining module 41 communicating with the placing chamber 21, and a high vacuum obtaining module 42 communicating with the placing chamber 21. Preferably, the rough vacuum obtaining module 41 includes a gas delivery vacuum pump, which includes a variable displacement vacuum pump, a momentum transfer pump, and the like, wherein the variable displacement vacuum pump includes a reciprocating vacuum pump, a rotary vacuum pump, and the like; the high vacuum obtaining module 42 includes a gas trapping vacuum pump, a gas trapping vacuum pump adsorption pump, a getter pump, a cryopump, etc., and preferably, the low vacuum obtaining module is communicated with the rear side of the placing cavity 21, and in order to increase the obtaining time and obtaining effect of the low vacuum in the placing cavity 21, 4 identical low vacuum obtaining modules are provided in the present embodiment. Preferably, the high vacuum obtaining module placing chamber 21 is communicated with the top. The low vacuum obtaining module 41 and the high vacuum obtaining module 42 are provided with throttle valves on the pipelines communicated with the placing cavity 21.
After the sealed placing cavity 21 is sealed, the placing cavity 21 is roughly vacuumized by the variable-capacity vacuum pump to enable the vacuum degree in the placing cavity 21 to reach 10-100pa, and then a cryogenic pump or a molecular vacuum pump intervenes. The placing chamber 21 is subjected to a fine vacuum. In this embodiment, a cryopump is taken as an example, and a cold plate cooled to an extremely low temperature by liquid helium or a refrigerator is disposed in the cryopump. The cryopump condenses the gas in the placing chamber 21 and keeps the vapor pressure of the condensate below the limit pressure of the pump, thereby achieving a high vacuum effect. The interior of the placing cavity 21 is in a high vacuum state, and no gas molecule interference exists, so that the vacuum degree in the pressure container is high, and the heat preservation effect is good; meanwhile, under the condition of no gas molecule interference, the interference on subsequent laser welding can be reduced, and the sealing effect of welding is improved.
① low-temperature condensation, in which gas molecules are condensed on the surface of cold plate or condensed on the condensed gas layer, and its equilibrium pressure is basically equal to the vapour pressure of condensate, the cold plate must be lower than 25K when pumping air, and the cold plate is lower when pumping hydrogen, the thickness of condensation layer of low-temperature condensation can be up to about 10 mm, ② low-temperature adsorption, in which gas molecules are in the thickness of a single molecular layer (10 mm)-8On the order of centimeters) is adsorbed onto the adsorbent surface coated on the cold plate. The equilibrium pressure of the adsorption is much lower than the vapor pressure at the same temperature. If the vapor pressure of hydrogen is equal to the atmospheric pressure at 20K, the adsorption equilibrium pressure is lower than 10 when the hydrogen is absorbed by 20K activated carbon-8pa. at higher temperatures it is possible to pump off by cryosorption ③ cryotrapping gas molecules that do not condense at the pumping temperature, buried and adsorbed by an increasing layer of condensable gas, generally speaking, the limiting pressure of the pump is the vapor pressure of the condensed gas at the cold plate temperature, at 120K, the vapor pressure of water is already below 10-8pa. At a temperature of 20K, in addition to helium, neon and hydrogenThe vapor pressure of the gas is also less than 10-8pa. However, due to the different temperatures of the pumped vessel and the cold plate, the ultimate pressure of the pump is higher than the vapor pressure of the condensate. For a room temperature vessel, the limiting pressure of the pump is about 4 times the condensate vapor pressure at 20K cryopanel. Finally, the vacuum degree in the placing chamber 21 is pumped to the required vacuum degree of the pressure vessel by the cryogenic pump.
The vacuumizing welding vacuum device further comprises a laser welding machine adjusting mechanism 6 arranged on the rack 1, and the laser welding machine 5 is fixed on the laser welding machine adjusting mechanism 6. The laser welder adjusting mechanism 6 includes a transverse adjusting portion 61, a longitudinal adjusting portion 62, and a vertical adjusting portion 63, and can adjust the laser welder 5 in the horizontal and vertical directions, so that the laser beam of the laser welder 5 can directly irradiate the to-be-welded positions of the pressure vessel body 91 and the bottom 92. The present laser welder adjustment mechanism 6 tends to fine tune the position of the laser welder 5.
The laser welding machine 5 comprises a laser head 51, a laser head inserting hole 221 is formed in the side wall of the cabin body 22, the laser head 51 extends into the placing cavity 21 through the laser head inserting hole 221, the laser head 51 is in soft sealing connection with the laser head inserting hole 221, preferably, a flexible welding corrugated pipe is adopted for connection, and the flexible welding corrugated pipe can be used for ensuring the sealing property while moving along with the laser head 51 so as to conveniently adjust the position of the laser head 51; a sealing lens is arranged in the laser head 51, so that the laser head 51 and the placing cavity 21 form a sealing effect.
The pressure vessel 7 of the present embodiment includes a pressure vessel body 71 and a pressure vessel bottom 72. The pressure vessel body 71 comprises an outer tire 711 and an inner tire 712 which are connected with each other at one end, an opening interlayer 713 is arranged between the outer tire 711 and the inner tire 712, and the end of the pressure vessel bottom 72 is matched with the other end of the outer tire 711 to form an annular gap 73 to be welded. The vacuum pumping welding device for the pressure container welds a seam 73 to be welded, so that a vacuum sealing interlayer is formed among the outer tire 711, the inner tire 712 and the bottom 72 of the pressure container. Preferably, the pressure container 7 is made of metal, and can be a thermos cup, a vacuum flask and the like.
The end part of the pressure container bottom 72 and the other end of the outer tire 711 have various matching modes and are all in the protection range of the application, for example, as shown in fig. 6 and 7, the end part of the pressure container bottom 72 is positioned at the inner side of the other end of the outer tire 711, the outer periphery of the end part of the pressure container bottom 72 is provided with a limiting bulge 74 and/or the inner periphery of the outer tire 911 is provided with a limiting bulge 74, and an annular gap to be welded is formed between the outer tire 911 and the limiting bulge 74; secondly, as shown in fig. 8 and fig. 9, the end part of the pressure container bottom 72 is positioned at the outer side of the other end of the outer tire 711, a limiting protrusion 74 is arranged on the inner periphery of the end part of the pressure container bottom 72 and/or a limiting protrusion 74 is arranged on the outer periphery of the outer tire 911, and an annular gap to be welded is formed between the end part of the pressure container bottom 72 and the limiting protrusion 74; ③ as shown in fig. 10 and 11, it is preferable to adopt a structure that the end of the pressure vessel bottom 72 is located inside the other end of the outer tire 711, and the outer circumference of the end of the pressure vessel bottom 72 is provided with the limit protrusion 74, but the above-mentioned 3 structures are all within the protection scope of the present application.
A vacuum welding method for pressure vessels comprises the vacuum welding device for the pressure vessels and the pressure vessels 7 to be welded. The pressure vessel 7 includes a pressure vessel body 71 and a pressure vessel bottom 72. The pressure vessel body 71 comprises an outer tire 711 and an inner tire 712 which are connected with each other at one end, an open interlayer 713 is arranged between the outer tire 711 and the inner tire 712, and the end of the pressure vessel bottom 72 is matched with the other end of the outer tire to form an annular gap 73 to be welded. The vacuum pumping welding device for the pressure container welds a seam 73 to be welded, so that a vacuum sealing interlayer is formed among the outer tire 711, the inner tire 712 and the bottom 72 of the pressure container. Preferably, the pressure container 7 is made of metal, and can be a thermos cup, a vacuum flask and the like.
The end part of the pressure container bottom 72 and the other end of the outer tire 711 have various matching modes and are all in the protection range of the application, for example, as shown in fig. 6 and 7, the end part of the pressure container bottom 72 is positioned at the inner side of the other end of the outer tire 711, the outer periphery of the end part of the pressure container bottom 72 is provided with a limiting bulge 74 and/or the inner periphery of the outer tire 911 is provided with a limiting bulge 74, and an annular gap to be welded is formed between the outer tire 911 and the limiting bulge 74; secondly, as shown in fig. 8 and fig. 9, the end part of the pressure container bottom 72 is positioned at the outer side of the other end of the outer tire 711, a limiting protrusion 74 is arranged on the inner periphery of the end part of the pressure container bottom 72 and/or a limiting protrusion 74 is arranged on the outer periphery of the outer tire 911, and an annular gap to be welded is formed between the end part of the pressure container bottom 72 and the limiting protrusion 74; ③ as shown in fig. 10 and 11, it is preferable to adopt a structure that the end of the pressure vessel bottom 72 is located inside the other end of the outer tire 711, and the outer circumference of the end of the pressure vessel bottom 72 is provided with the limit protrusion 74, but the above-mentioned 3 structures are all within the protection scope of the present application.
The gap to be welded 73 shown in fig. 6, 7, 8, 9, 10 and 11 is exaggeratedly larger than the actual gap to be welded 73, which is the case: in the production process, as shown in fig. 6 and 7, the outer tire 711 is abutted against the limiting protrusion 74, a very small gap 73 to be welded is formed between the outer tire 711 and the limiting protrusion 74, and the outer tire 711 and the limiting protrusion 74 are welded by a laser welding machine; as shown in fig. 8 and 8, the pressure vessel bottom 72 abuts against the limit protrusion 74, a very small gap 73 to be welded is formed between the pressure vessel bottom 72 and the limit protrusion 74, and the laser welding machine performs welding; as shown in fig. 10 and 11, the pressure vessel bottom 72 abuts against the outer tire 711, and a very small gap 73 to be welded is formed between the pressure vessel bottom 72 and the outer tire 711, and is welded by the laser welding machine. Because the gap 73 to be welded is very small, the finished weld is also small, the welding time can be saved, and the welding quality can be improved (compared with the laser welding of a large gap, the time is wasted, the sealing requirement of the welding is high, and small air holes are easy to appear). The vacuum pumping welding method for the pressure container comprises the following steps:
step 1: the hatch 23 is opened, the pressure container body 71 is clamped on the lower claw disc 31, and the pressure container bottom 72 is clamped on the upper claw disc 33;
step 2: the sealing driving mechanism 24 is driven to drive the cabin door 23 to seal the placing cavity 21;
and step 3: driving the low vacuum obtaining module 41 to perform low vacuum pumping treatment on the placing cavity 21, so that the vacuum degree in the placing cavity 21 reaches 10-100 pa;
and 4, step 4: the high vacuum obtaining module 42 is driven to perform high vacuum treatment on the placing cavity 21, so that the gas in the placing cavity 21 is condensed, and the vapor pressure of the condensate is kept lower than the limit pressure of the high vacuum obtaining module 42, thereby achieving the effect of high vacuum. So that the inside of the placing cavity 21 reaches a high vacuum state without gas molecule interference;
and 5: the driving assembly 34 drives the upper claw disc 33 to move downwards, so that the pressure container bottom 72 is pressed on the pressure container body 71, and the end part of the pressure container bottom 72 is matched with the other end part of the outer tire 711 to form an annular gap 73 to be welded;
step 6: adjusting the adjusting mechanism 6 of the laser welding machine to ensure that the light outlet of the laser welding machine 5 is directly opposite to the gap 73 to be welded;
and 7: the first driving motor 32 is driven to drive the lower claw disc 31 to rotate, the pressure container body 71 and the container bottom 72 are driven to synchronously rotate, the laser welding machine 5 is driven to weld the gap 73 to be welded, and a vacuum sealing interlayer is formed among the outer tire 711, the inner tire 712 and the pressure container bottom 72.
20 vacuum cups manufactured by the vacuum-pumping welding device and the vacuum-pumping welding method for the pressure container are taken for heat preservation experiments, and the heat preservation effect is tested.
Removing the cup cover from the vacuum cup and standing for 2 hours at the room temperature of 20 +/-2 ℃ in a nearly windless state, injecting boiling water to a position 5mm below the water blocking part, standing vertically, screwing the cup cover when the water temperature is 95 +/-0.5 ℃, measuring the water temperature in the cup after standing for 6 hours. The standard requirement is that the heat preservation efficiency is 6 hours and the value is more than or equal to 46 ℃, which meets the requirement. The final test temperature after 6 hours was 50.9 ℃, 51.8 ℃, 50.4 ℃, 51.0 ℃, 50.7 ℃, 50.4 ℃, 50.7 ℃, 51.6 ℃, 51.9 ℃, 50.9 ℃, 52.2 ℃, 51.4 ℃, 51.7 ℃, 51.2 ℃, 51.4 ℃, 52.4 ℃, 52.1 ℃, 51.9 ℃ and 50.8 ℃, and the standard requirements were met.
10 vacuum cups manufactured by the vacuum welding device and the vacuum welding method for the pressure container are taken for cold insulation experiments, and the cold insulation effect is tested.
Removing the cup cover of the vacuum cup and placing for 2 hours at the room temperature of 20 +/-2 ℃ in a nearly windless state, then injecting ice water to the position below 5mm from the mouth, vertically placing, screwing the cup cover when the water temperature is 1 +/-0.5 ℃, measuring the water temperature in the cup after placing for 12 hours. The standard requires that the cold insulation efficiency is 12 hours and the value < =12.7 ℃ is in accordance with the requirement. The final test temperature after 6 hours was 11.8 deg.C, 11.6 deg.C, 11.8 deg.C, 11.5 deg.C, 11.6 deg.C, 11.7 deg.C, 11.8 deg.C, 12.0 deg.C, 12.1 deg.C, and met the standard requirements.
In summary, the vacuum-pumping welding device and the vacuum-pumping welding method for the pressure vessel according to the present invention can directly vacuum-pump the pressure vessel body and the pressure vessel bottom of the pressure vessel in the placing cavity, and directly weld the pressure vessel body and the pressure vessel bottom of the pressure vessel. The vacuum pumping welding device for the pressure container has the advantages of simple structure, simple vacuum pumping welding process for the pressure container, low cost and good sealing welding effect. The vacuum pumping welding method for the pressure container has the advantages of simple vacuum pumping welding step, good sealing welding effect, high welding seam stability and difficult damage. The complex steps of firstly forming a gap at the bottom of the pressure container, then welding the pressure container body of the pressure container and the bottom of the pressure container, then vacuumizing the interior of the pressure container, and finally welding the gap formed at the bottom of the pressure container are avoided.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims (10)

1. The utility model provides a pressure vessel evacuation welding set, includes the frame, locates have in the frame place the chamber, locate place the intracavity pressure vessel anchor clamps, with place the evacuation mechanism that the chamber is linked together, locate be used for in the frame carrying out the laser-beam welding machine of sealing welder to pressure vessel, its characterized in that:
the placing cabin comprises a cabin body with the placing cavity, the placing cavity is provided with an opening communicated with the outside, the placing cabin further comprises a cabin door matched with the opening, and a sealing driving mechanism used for tightly pressing the cabin door at the opening in a sealing manner;
the pressure container clamp comprises a lower claw disc arranged in a placing cavity, a first driving motor used for driving the lower claw disc to rotate, an upper claw disc which can be arranged in the placing cavity in a rotating mode along the axis direction of the pressure container clamp and is located on the upper side of the lower claw disc, and a driving assembly used for driving the upper claw disc to move towards the direction close to or away from the lower claw disc, wherein the first driving motor and the driving assembly are arranged in a sealing mode with the placing cavity.
2. The vacuum welding apparatus for pressure vessels according to claim 1, wherein: the drive assembly comprises a lead screw arranged in the vertical direction, a second drive motor used for driving the lead screw to rotate, a roller matched with the lead screw, a guide post arranged in the cavity in parallel with the lead screw, and a sliding plate arranged on the guide post in a sliding way, wherein the roller is fixed with the sliding plate, and the upper claw disc can be arranged on the sliding plate in a rotating way along the axis direction of the upper claw disc.
3. The vacuum welding apparatus for pressure vessels according to claim 1, wherein: the placing cabin further comprises a sliding rail arranged at the opening, a sliding groove matched with the sliding rail is formed in the cabin door, and the sealing driving mechanism comprises a first driving cylinder used for driving the cabin door to reciprocate along the sliding rail.
4. The apparatus of claim 3, wherein: the cabin door comprises a front end cover provided with the sliding groove, a sealing cover which is arranged on the front end cover in a sliding mode and can move towards or away from the opening direction, and the sealing driving mechanism further comprises a second driving cylinder which is used for driving the sealing cover to move towards or away from the opening direction.
5. The apparatus of claim 4, wherein: the cabin door also comprises a guide mechanism for guiding the movement of the sealing cover, wherein the guide mechanism comprises a guide hole arranged on the front end cover and a guide post fixed on the sealing cover and matched with the guide hole.
6. The vacuum welding apparatus for pressure vessels according to claim 1, wherein: the vacuumizing mechanism comprises a low vacuum obtaining module communicated with the placing cavity and a high vacuum obtaining module communicated with the placing cavity.
7. The vacuum welding apparatus for pressure vessels according to claim 6, wherein: the rough acquisition module includes a gas delivery vacuum pump and the high vacuum acquisition module includes a gas capture vacuum pump.
8. The vacuum welding apparatus for pressure vessels according to claim 1, wherein: the vacuumizing welding device further comprises a laser welding machine adjusting mechanism arranged on the rack, the laser welding machine is fixed on the laser welding machine adjusting mechanism, and the laser welding machine adjusting mechanism comprises a transverse adjusting part, a longitudinal adjusting part and a vertical adjusting part.
9. The vacuum welding apparatus for pressure vessels according to claim 1, wherein: the laser welding machine includes the laser head, cabin side wall has seted up the laser head and has stretched into the hole, the laser head passes through the laser head stretches into the hole and stretches into place the intracavity, the laser head with the laser head stretches into the hole and adopts flexible welding bellows to connect, be equipped with sealed lens in the laser head.
10. A vacuum-pumping welding method for a pressure container is characterized by comprising the following steps: the vacuum-pumping welding device for the pressure container and the pressure container to be welded, which comprises the vacuum-pumping welding device for the pressure container as claimed in claims 1 to 9, wherein the pressure container comprises a pressure container body and a pressure container bottom, the pressure container body comprises an outer tire and an inner tire which are connected with each other at one end, an open interlayer is arranged between the outer tire and the inner tire, the end part of the pressure container bottom is matched with the other end part of the outer tire to form an annular gap to be welded, and the vacuum-pumping welding method for the pressure container is as follows:
step 1: opening the hatch door, clamping the pressure container body on the lower claw disc, and clamping the pressure container bottom on the upper claw disc;
step 2: driving the sealing driving mechanism to drive the cabin door to seal the placing cavity;
and step 3: driving the low vacuum obtaining module to perform low vacuum pumping treatment on the placing cavity;
and 4, step 4: driving the high vacuum obtaining module to perform high vacuum pumping treatment on the placing cavity;
and 5: the driving component is driven to drive the upper claw disc to move downwards, so that the bottom of the pressure container is pressed on the pressure container body, the end part of the bottom of the pressure container is matched with the other end part of the outer tire to form an annular gap 73 to be welded
Step 6: adjusting the adjusting mechanism of the laser welding machine to enable a light outlet of the laser welding machine to be directly opposite to the gap to be welded;
and 7: and driving the first driving motor to drive the lower claw disc to rotate, driving the pressure container body and the container bottom to synchronously rotate, and driving the laser welding machine to weld the to-be-welded seam, so that a vacuum sealing interlayer is formed among the outer tire, the inner tire and the pressure container bottom.
CN202010486849.XA 2020-06-02 2020-06-02 Vacuum-pumping welding device and method for pressure container Pending CN111531276A (en)

Priority Applications (1)

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CN202010486849.XA CN111531276A (en) 2020-06-02 2020-06-02 Vacuum-pumping welding device and method for pressure container

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010486849.XA CN111531276A (en) 2020-06-02 2020-06-02 Vacuum-pumping welding device and method for pressure container

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Application Number Title Priority Date Filing Date
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117680807A (en) * 2024-02-02 2024-03-12 潍坊市连庆封头制造有限公司 Vacuum-pumping welding device for pressure vessel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117680807A (en) * 2024-02-02 2024-03-12 潍坊市连庆封头制造有限公司 Vacuum-pumping welding device for pressure vessel
CN117680807B (en) * 2024-02-02 2024-04-16 潍坊市连庆封头制造有限公司 Vacuum-pumping welding device for pressure vessel

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