Detachable spiral plate heat exchanger welding device and process

Abstract

The invention relates to the field of welding technology, and specifically discloses a detachable spiral plate heat exchanger welding device and process, wherein a plurality of welding guns are mounted on a positioning frame and arranged along the width direction of a base, a plurality of detection components correspond one to one with the plurality of welding guns, a sleeve one is rotatably mounted on the positioning frame, an opening one facing the welding gun is arranged at the side surface of the bottom end of the sleeve one, a sleeve two is rotatably fitted in the sleeve one, an opening two facing the welding gun is arranged at the side surface of the sleeve two, an elastic member one is arranged between the sleeve one and the sleeve two, when the sleeve one rotates relative to the sleeve two, the elastic member one can apply a thrust to the sleeve two, a guide rod slides up and down and fits in the sleeve two, and can rotate synchronously with the sleeve two, two clamping members are connected to the lower part of the guide rod, and are arranged along the width direction of the base, when the guide rod descends and ascends, the two clamping members can approach and move away from each other; the invention facilitates the detection of the welding state of the distance column and is convenient to use.

Description

Technical Field

[0001] The invention relates to the technical field of welding, and in particular to a welding device and process for a detachable spiral plate heat exchanger. Background Art

[0002] The spiral plate heat exchanger is a heat exchanger that is made of two parallel metal plates rolled into two spiral channels. The heat exchange between the cold and hot fluids is carried out through the spiral plate wall. The spiral plate heat exchanger has the advantages of small size, compact equipment, high heat transfer efficiency and low metal consumption. It is suitable for chemical, petroleum, medicine, machinery, electric power, environmental protection, energy saving and other industrial fields that require heat conversion.

[0003] At present, both metal plates of the spiral plate heat exchanger need to be welded with spacer columns. When the two sets of metal plates are curled into a spiral structure, the spacer columns are located between the two metal plates to enhance the rigidity of the entire heat exchanger and prevent the metal plates from deforming.

[0004] The patent document with authorization announcement number CN117900709B discloses a spiral plate heat exchanger welding device and process, which belongs to the field of spiral plate heat exchanger processing technology, and includes a base, a drive assembly, a conveying assembly and a welding gun. The drive assembly is arranged on the upper part of the base, and is used to drive the metal plate to move intermittently along the upper part of the base. The conveying assembly is arranged on one side of the drive assembly. When the metal plate is stationary on the upper part of the base, the conveying assembly is used to convey a distance column to the upper surface of the metal plate. The welding gun is installed at the bottom of the conveying assembly. When the distance column is conveyed to the upper surface of the metal plate, the welding gun is used to weld the distance column and the metal plate into one.

[0005] Since the welding of the distance columns belongs to stud welding, the welding quality needs to be inspected after welding to prevent false welding. The above technical solution can realize continuous automatic welding between the distance columns and the metal plates, but the solution lacks a detection structure for the positioning columns after welding, and cannot promptly detect the distance columns with unqualified welding quality, which is inconvenient to use. Summary of the invention

[0006] The present invention provides a detachable spiral plate heat exchanger welding device and process, aiming to solve the problem in the related art that there is a lack of a detection structure for the positioning columns after welding, and the spacing columns with unqualified welding quality cannot be discovered in time.

[0007] A detachable spiral plate heat exchanger welding device comprises a base, a positioning frame, a welding assembly and a plurality of detection assemblies, wherein the positioning frame is arranged on the base and can move along the length direction of the base, the welding assembly comprises a plurality of welding guns, the plurality of welding guns are all mounted on the positioning frame and arranged along the width direction of the base, the plurality of detection assemblies are all mounted on the positioning frame and arranged along the width direction of the base, and the plurality of detection assemblies correspond to the plurality of welding guns one by one;

[0008] The detection assembly includes a sleeve one, a sleeve two, a guide rod and two clamping members. The sleeve one is rotatably mounted on the positioning frame, an opening one facing the welding gun is provided on the side surface of the bottom end of the sleeve one, the sleeve two is rotatably fitted in the sleeve one, an opening two facing the welding gun is provided on the side surface of the sleeve two, an elastic member one is provided between the sleeve one and the sleeve two, when the sleeve one rotates relative to the sleeve two, the elastic member one can apply a thrust force to the sleeve two, the guide rod slides up and down and fits in the sleeve two, and can rotate synchronously with the sleeve two, the two clamping members are connected to the lower part of the guide rod and are arranged along the width direction of the base, and when the guide rod descends and rises, the two clamping members can approach and move away from each other.

[0009] The beneficial effects of the present invention are as follows: when the present invention detects the welded distance columns, first the welded distance columns are allowed to enter the second sleeve through the first opening and the second opening, and then the first sleeve is controlled to rotate and the guide rod is moved downward, so that the welding state of the distance columns can be detected. In addition, when the detection component detects the welded distance columns, the welding component can simultaneously weld the next row of distance columns, and has the effect of accurately locating the welding position, which is convenient to use.

[0010] Preferably, the positioning frame includes a frame body 1 and a frame body 2 arranged along the length direction of the base, the welding assembly is installed on the frame body 1, the detection assembly is installed on the frame body 2, and a driving member 1 is provided between the frame body 1 and the frame body 2 so as to drive the frame body 1 and the frame body 2 to be closer to or farther away from each other, which has the effect of facilitating the adjustment of the distance between the frame body 1 and the frame body 2 according to the set distance between the two rows of spacing columns.

[0011] Preferably, a support frame and a driving member three for driving the support frame to rise and fall are provided on the upper part of the frame body two, an external thread is provided on the outer peripheral side of the upper end of the sleeve one, and a threaded sleeve is threadedly matched with the external thread, and the threaded sleeve is connected to the support frame, which has the effect that when controlling the lifting and lowering of the support frame, the sleeve one can be rotated by the threaded matching of the threaded sleeve and the sleeve one.

[0012] Preferably, pushing members are respectively provided on both sides of the lower end of the guide rod, and the surfaces of the pushing members facing the inner side of the second sleeve are inclined surfaces. The two clamping members are respectively located on the inner sides of the two pushing members, and an elastic member 2 is provided on the side of the clamping member away from the inner side of the second sleeve. The effect is that when the guide rod is controlled to descend, the two clamping members can be brought close to each other and clamp the distance column.

[0013] Preferably, the upper end of the guide rod is fixedly connected to a rotating part, the outer peripheral side of the rotating part is rotatably matched with a positioning part, the positioning part is connected to the support frame, the rotating part, the positioning part and the support frame can be raised and lowered synchronously, a liquid storage pot is installed on the upper part of the positioning part, a guide groove 1 connected to the liquid storage pot is provided in the guide rod, an extension part is fixedly connected to the bottom end of the guide rod, a guide groove 2 connected to the guide groove 1 is provided in the extension part, and the guide groove 2 has a downward liquid outlet.

[0014] Preferably, an elastic member three is provided between the rotating member and the positioning member, and when the rotating member rotates relative to the positioning member, the elastic member three will be compressed.

[0015] Preferably, the upper part of the base is provided with two limit plates arranged along the width direction of the base, the limit plates are slidably connected to the base, and a driving member four is provided on the base for driving the two limit plates to move closer to or away from each other, which has the effect of facilitating the adjustment of the spacing between the two limit plates according to the width of the metal plate so as to limit the metal plate.

[0016] The welding process of the detachable spiral plate heat exchanger of the present invention is described below.

[0017] A detachable spiral plate heat exchanger welding process comprises the following steps:

[0018] The metal plate is placed on the base, and a row of distance columns are first welded on the metal plate by welding the assembly;

[0019] Control the movement of the positioning frame so that the welded distance column enters the second casing through the first opening and the second opening;

[0020] The control sleeve is rotated and the guide rod is moved downward, and the distance column is clamped by two clamping members;

[0021] If the distance column and the metal plate are in a virtual welding state, when the sleeve 1 rotates, the sleeve 2, the guide rod, the clamping piece and the distance column will rotate, and the distance column will be separated from the metal plate;

[0022] If the spacer column is normally welded on the metal plate, when the sleeve pipe 1 rotates, the sleeve pipe 2, the guide rod, the clamping member and the spacer column cannot be driven to rotate.

[0023] By adopting the above technical scheme, the beneficial effects of the present invention are as follows: when the present invention detects the distance columns after welding, first the welded distance columns are allowed to enter the sleeve two through the opening one and the opening two, and then the sleeve one is controlled to rotate and the guide rod is moved downward, so that the welding state of the distance columns can be detected. In addition, when the detection component detects the welded distance columns, the welding component can simultaneously weld the distance columns of the next row, and has the effect of accurately locating the welding position, which is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention.

[0025] Figure 2 It is a schematic diagram of the installation structure of the frame 1 and the frame 2 of the present invention.

[0026] Figure 3 It is a schematic diagram of the cross-sectional structure of the detection component of the present invention.

[0027] Figure 4 It is a schematic diagram of the matching structure of the pushing member and the clamping member of the present invention.

[0028] Figure 5 It is a schematic diagram of the cross-sectional structure of the sleeve 1 of the present invention.

[0029] Figure 6 It is a structural schematic diagram of the sleeve 2 of the present invention.

[0030] Figure 7 It is a schematic diagram of the cross-sectional structure of the guide rod of the present invention.

[0031] Reference numerals:

[0032] 1. Base; 2. Positioning frame; 21. Frame one; 22. Frame two;

[0033] 3. Welding assembly; 31. Welding gun; 41. Casing 1; 411. Opening 1; 412. Accommodating groove; 42. Casing 2; 421. Opening 2; 422. Vertical groove; 43. Guide rod; 431. Pushing member; 432. Guide groove 1; 44. Clamping member; 45. Elastic member 1;

[0034] 51. Support frame; 52. Threaded sleeve; 53. Rotating member; 54. Positioning member; 55. Liquid storage pot; 56. Extension member; 561. Second guide groove; 57. Third elastic member; 58. Fixed block;

[0035] 61, driving member 1; 62, driving member 2; 63, driving member 3; 64, driving member 4;

[0036] 7. Limiting plate; 8. Metal plate. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0038] like Figures 1 to 7 As shown, the detachable spiral plate heat exchanger welding device of the embodiment of the present invention includes a base 1, a positioning frame 2, a welding assembly 3 and a plurality of detection assemblies. For ease of understanding, the length direction of the base 1 is defined as the left-right direction, and the width direction of the base 1 is defined as the front-back direction.

[0039] like Figures 1 to 3 As shown, the positioning frame 2 is disposed on the base 1 and can move along the length direction of the base 1 . The welding assembly 3 includes a plurality of welding guns 31 . The plurality of welding guns 31 are all mounted on the positioning frame 2 and arranged along the width direction of the base 1 .

[0040] Specifically, the positioning frame 2 includes a frame body 21 and a frame body 22 arranged along the left-right direction, and a driving member 61 is provided between the frame body 21 and the frame body 22. The driving member 61 can be an electric push rod, and its left and right ends are respectively fixedly connected to the frame body 21 and the frame body 22. The driving member 61 is controlled to extend and shorten, so as to drive the frame body 21 and the frame body 22 to move away from and close to each other. The base 1 is provided with a driving member 62. The driving member 62 can be an electric push rod, and its left and right ends are respectively fixedly connected to the base 1 and the frame body 22. The driving member 62 is controlled to extend and shorten, so as to drive the positioning frame 2 to move in the left-right direction.

[0041] The welding assembly 3 is installed on the frame 21, and multiple welding guns 31 are evenly arranged along the front and rear directions. When welding, the metal plate 8 is placed on the base 1. The welding assembly 3 can weld the entire row of distance columns to the metal plate 8. Among them, the welding assembly 3 is an existing mature technology and will not be elaborated in detail here.

[0042] like Figures 1 to 7 As shown, multiple detection components are installed on the frame body 22 and arranged along the front-to-back direction. The multiple detection components correspond to the multiple welding guns 31 one by one. The upper part of the frame body 22 is provided with a support frame 51 and a driving member 3 63 for driving the support frame 51 to rise and fall. The driving member 3 63 can be an electric push rod, and its upper and lower ends are respectively fixedly connected to the support frame 51 and the frame body 22, which controls the extension and retraction of the driving member 3 63 and can drive the support frame 51 to rise and fall.

[0043] The detection assembly includes a sleeve 41, a sleeve 42, a guide rod 43 and two clamping members 44. The sleeve 41 and the sleeve 42 are both vertically arranged. The sleeve 41 is rotatably installed on the positioning frame 2. An opening 411 facing the left direction is provided on the side surface of the bottom end of the sleeve 41. The sleeve 42 is rotatably fitted in the sleeve 41. An opening 421 facing the side direction is provided on the side surface of the sleeve 42. A receiving groove 412 is provided on the inner wall of the sleeve 41. An elastic member 45 is provided in the receiving groove 412. The elastic member 45 is an arc-shaped spring, and its two ends are respectively fixedly connected to the sleeve 41 and the sleeve 42, so that when the sleeve 41 rotates relative to the sleeve 42, the elastic member 45 can apply a thrust to the sleeve 42.

[0044] A vertical groove 422 is provided on the inner side surface of the second sleeve 42, and the guide rod 43 is arranged in the second sleeve 42 and slides up and down in the vertical groove 422, so that the guide rod 43 can rotate synchronously with the second sleeve 42, and the front and rear sides of the lower end of the guide rod 43 are respectively provided with push pieces 431, and the surface of the push piece 431 facing the inner side of the second sleeve 42 is an inclined surface, and the inclined surface gradually approaches the center of the second sleeve 42 from bottom to top, and the two clamping members 44 are respectively located on the inner sides of the two push pieces 431, that is, the clamping members 44 are in contact with the inclined surfaces, and when the clamping members 44 are away from the sleeve An elastic member 2 (not shown in the figure) is provided on one side of the inner side of the second 42. The elastic member 1 45 can be a spring, and its two ends are respectively fixedly connected to the guide rod 43 and the clamping member 44, so that when the guide rod 43 descends, the pushing member 431 will synchronously descend with the guide rod 43, and the two clamping members 44 can be pushed closer to each other through the two pushing members 431, and the welded distance columns can be clamped, and the elastic member 2 will be stretched. When the guide rod 43 rises, the pushing member 431 will be separated from the stopper of the clamping member 44, and the clamping member 44 will be reset under the pull of the elastic member 2.

[0045] like Figure 3 and Figure 5 As shown, an external thread is provided on the outer peripheral side of the upper end of the sleeve 41, and a threaded sleeve 52 is threadedly matched at the external thread. The threaded sleeve 52 is fixedly mounted on the support frame 51. When the support frame 51 is raised or lowered, the threaded sleeve 52 will be driven to rise or fall synchronously. Through the threaded match between the threaded sleeve 52 and the sleeve 41, the sleeve 41 will rotate.

[0046] like Figure 3 , Figure 6 and Figure 7As shown, the upper end of the guide rod 43 is fixedly connected with a rotating member 53, and the outer peripheral side of the rotating member 53 is rotatably matched with a positioning member 54, and the positioning member 54 is fixedly connected to the support frame 51. The rotating member 53, the positioning member 54 and the support frame 51 can be raised and lowered synchronously, and an elastic member 3 57 is provided between the rotating member 53 and the positioning member 54. The outer peripheral side of the rotating member 53 is fixedly connected with a fixed block 58. The elastic member 3 57 can be a spring with an arc-shaped structure, and its two ends are respectively fixedly connected to the fixed block 58 and the positioning member 54. When the rotating member 53 rotates relative to the positioning member 54, the elastic member 3 57 will be compressed.

[0047] A liquid storage pot 55 is installed on the upper part of the positioning member 54, and paint is stored in the liquid storage pot 55. A guide groove 1 432 connected to the liquid storage pot 55 is provided in the guide rod 43, and an extension member 56 is fixedly connected to the bottom end of the guide rod 43. The extension member 56 extends from the opening 1 411 and the opening 2 421. A guide groove 2 561 connected to the guide groove 1 432 is provided in the extension member 56. The guide groove 2 561 has a downward liquid outlet. A spraying mechanism (not shown in the figure) is provided on the liquid storage pot 55, and the paint in the liquid storage pot 55 can be sprayed out from the guide groove 1 432 and the guide groove 2 561 through the spraying mechanism.

[0048] When welding, the metal plate 8 is placed on the base 1, and a row of distance columns are first welded on the metal plate 8 through the welding assembly 3, and then the driving member 2 62 is controlled to contract, so that the positioning frame 2 moves to the left by a set distance, and the sleeve 1 41 and the sleeve 2 42 will move to the left synchronously with the positioning frame 2 until the welded distance columns enter the sleeve 2 42 through the opening 1 411 and the opening 2 421. At this time, the two clamping members 44 are respectively located on both sides of the distance columns, and then the driving member 3 63 is controlled to contract to drive the support frame 51 to move downward. The downward movement of the support frame 51 will drive the threaded sleeve 52, the positioning member 54, the rotating member 53 and the guide rod 43 to move downward synchronously. When the guide rod 43 moves downward, the pushing member 431 will descend synchronously with the guide rod 43, and the two pushing members 431 can push the two clamping members 44 to approach each other, and clamp the distance columns, and the elastic member 2 will be stretched;

[0049] At the same time, the threaded sleeve 52 cooperates with the thread of the sleeve 1 41, which causes the sleeve 1 41 to rotate clockwise. At this time, the elastic member 1 45 disposed between the sleeve 1 41 and the sleeve 2 42 applies a clockwise force to the sleeve 2 42. Since the guide rod 43 can only rotate synchronously with the sleeve 2, the two clamping members 44 are in a clamping state with respect to the distance column.

[0050] If the distance column and the metal plate 8 are in a virtual welding state, the force applied by the elastic member 1 45 to the sleeve 2 42 will drive the sleeve 2 42, the guide rod 43, the clamping member 44 and the distance column to rotate, and the distance column will be detached from the metal plate 8. When the guide rod 43 rotates clockwise, it will drive the rotating member 53 and the fixed block 58 to rotate clockwise, and the elastic member 3 57 will be compressed. A pressure sensor (not shown in the figure) can be arranged between the fixed block 58 and the positioning member 54. When the pressure sensor detects pressure, the spraying mechanism can spray the paint in the liquid storage pot 55 from the guide groove 1 432 and the guide groove 2 561. Since the guide rod 43 and the extension member 56 are in a rotating state at this time, the paint sprayed through the liquid outlet can mark an arc surface on the side of the distance column.

[0051] If the distance column is normally welded on the metal plate 8, since the two clamping members 44 are clamped on the distance column, the force applied by the elastic member 1 45 to the sleeve 2 42 cannot drive the sleeve 2 42, the guide rod 43, the clamping member 44 and the distance column to rotate. At this time, the rotation of the sleeve 1 41 will cause the elastic member 1 45 disposed between the sleeve 1 41 and the sleeve 2 42 to undergo elastic deformation;

[0052] From the above, it can be known that by controlling the contraction of the driving member 2 62 and the driving member 3 63 respectively, the welding detection of the distance column can be completed, and the distance column where the cold weld occurs can be spray-marked to facilitate subsequent processing.

[0053] After the detection is completed, the driving member is controlled to extend, driving the support frame 51 to rise, which will drive the threaded sleeve 52, the positioning member 54, the rotating member 53 and the guide rod 43 to rise synchronously, and the threaded sleeve 52 cooperates with the thread of the sleeve 1 41 to make the sleeve 1 41 rotate counterclockwise, and drive the sleeve 2 42 to rotate counterclockwise until the opening 1 411 and the opening 2 421 face the right side. At this time, the opening 1 411 and the opening 2 421 can avoid the distance column, and then the driving member 2 62 is controlled to continue to shrink, that is, it can drive the positioning frame 2 and the welding assembly 3 and the detection assembly installed on the positioning frame 2 to move synchronously to the left, so that the whole row of distance columns can be welded step by step on the metal plate 8, and the welded distance columns can be detected at the same time.

[0054] The driving member 1 61 can be controlled to extend and retract according to the set distance between the two rows of spacing columns, so as to adjust the distance between the frame 1 21 and the frame 2 22 .

[0055] In addition, when the inspection component is inspecting the welded distance columns, the welding component 3 can simultaneously weld the distance columns of the next row.

[0056] like Figure 1As shown, the upper part of the base 1 is provided with two limit plates 7 arranged along the front-to-back direction of the bottom. When welding, the metal plate 8 is placed between the two limit plates 7. The limit plate 7 is slidably connected to the base 1. The limit plate 7 can move in the front-to-back direction, and a driving member four 64 is provided on the base 1 for driving the two limit plates 7 to move closer to or away from each other. The driving member four 64 can be an electric push rod, and its two ends are fixedly connected to the base 1 and the limit plate 7 respectively. By controlling the extension and retraction of the driving member four 64, the distance between the two limit plates 7 can be adjusted according to the width of the metal plate 8 to limit the metal plate 8.

[0057] The welding process of the detachable spiral plate heat exchanger of the present invention is described below.

[0058] A detachable spiral plate heat exchanger welding process comprises the following steps:

[0059] The metal plate 8 is placed on the base 1, and a row of distance columns are first welded on the metal plate 8 by means of the welding assembly 3;

[0060] Control the positioning frame 2 to move so that the welded distance column enters the second casing 42 through the first opening 411 and the second opening 421;

[0061] The control sleeve 1 41 is rotated and the guide rod 43 is moved downward, and the distance column is clamped by two clamping members 44;

[0062] If the distance column and the metal plate 8 are in a virtual welding state, when the sleeve 1 41 rotates, the sleeve 2 42, the guide rod 43, the clamping member 44 and the distance column will rotate, and the distance column will be separated from the metal plate 8;

[0063] If the distance column is normally welded to the metal plate 8, when the sleeve 1 41 rotates, it cannot drive the sleeve 2 42, the guide rod 43, the clamping member 44 and the distance column to rotate.

[0064] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A detachable spiral plate heat exchanger welding device, comprising a base, characterized in that: It also includes a positioning frame, a welding assembly and a plurality of detection assemblies. The positioning frame is arranged on the base and can move along the length direction of the base. The welding assembly includes a plurality of welding guns. The plurality of welding guns are all installed on the positioning frame and arranged along the width direction of the base. The plurality of detection assemblies are all installed on the positioning frame and arranged along the width direction of the base. The plurality of detection assemblies correspond to the plurality of welding guns one by one. The detection assembly includes a sleeve one, a sleeve two, a guide rod and two clamping members. The sleeve one is rotatably mounted on the positioning frame. An opening one facing the welding gun is provided on the side surface of the bottom end of the sleeve one. The sleeve two is rotatably fitted in the sleeve one. An opening two facing the welding gun is provided on the side surface of the sleeve two. An elastic member one is provided between the sleeve one and the sleeve two. When the sleeve one rotates relative to the sleeve two, the elastic member one can apply a top thrust to the sleeve two. The guide rod slides up and down and fits in the sleeve two and can rotate synchronously with the sleeve two. The two clamping members are connected to the lower part of the guide rod and are arranged along the width direction of the base. When the guide rod descends and rises, the two clamping members can approach and move away from each other. The positioning frame includes a frame one and a frame two arranged along the length direction of the base. The welding assembly is mounted on the frame one, and the detection assembly is mounted on the frame two. A driving member one is provided between the frame one and the frame two so as to drive the frame one and the frame two to approach or move away from each other. The upper part of the frame body 2 is provided with a support frame and a driving member 3 for driving the support frame to rise and fall. The outer peripheral side of the upper end of the sleeve 1 is provided with an external thread, and a threaded sleeve is threadedly matched at the external thread, and the threaded sleeve is connected to the support frame; Pushing pieces are respectively arranged on both sides of the lower end of the guide rod, and the surface of the pushing piece facing the inner side of the second sleeve is an inclined surface, and two clamping pieces are respectively located on the inner sides of the two pushing pieces, and a second elastic piece is arranged on the side of the clamping piece away from the inner side of the second sleeve; The upper end of the guide rod is fixedly connected with a rotating member, the outer peripheral side of the rotating member is rotatably matched with a positioning member, the positioning member is connected to the support frame, the rotating member, the positioning member and the support frame can be raised and lowered synchronously, a liquid storage pot is installed on the upper part of the positioning member, a guide groove 1 connected to the liquid storage pot is provided in the guide rod, an extension member is fixedly connected to the bottom end of the guide rod, a guide groove 2 connected to the guide groove 1 is provided in the extension member, and the guide groove 2 has a downward liquid outlet; An elastic member three is arranged between the rotating member and the positioning member, and when the rotating member rotates relative to the positioning member, the elastic member three will be compressed.

2. The detachable spiral plate heat exchanger welding device according to claim 1, characterized in that: The upper part of the base is provided with two limit plates arranged along the width direction of the base, the limit plates are slidably connected to the base, and a driving member 4 is provided on the base for driving the two limit plates to move closer to or away from each other.

3. A welding process based on the detachable spiral plate heat exchanger welding device according to claim 1 or 2, characterized in that: The following steps are involved: The metal plate is placed on the base, and a row of distance columns are first welded on the metal plate by welding the assembly; Control the positioning frame to move so that the welded distance column enters the second sleeve through the first opening and the second opening; control the first sleeve to rotate and move the guide rod downward, and clamp the distance column through two clamps; if the distance column and the metal plate are in a virtual welding state, when the first sleeve rotates, the second sleeve, the guide rod, the clamp and the distance column will be driven to rotate, and the distance column will be separated from the metal plate; If the spacer column is normally welded on the metal plate, when the sleeve pipe 1 rotates, the sleeve pipe 2, the guide rod, the clamping member and the spacer column cannot be driven to rotate.

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