A longitudinal seam welding tooling for the inner tank of a low-temperature storage tank

Abstract

The present invention relates to the technical field of auxiliary welding equipment for cryogenic storage tanks, and specifically relates to a longitudinal seam welding tooling for the inner tank of a cryogenic storage tank. The longitudinal seam welding tooling for the inner tank of a cryogenic storage tank includes a machine base, a support structure, a welding seat, an adjustment mechanism, and at least a pair of calibration guide rails. The calibration guide rails of the same pair are symmetrically arranged on both sides of the longitudinal seam. At least one adjustment part is arranged on each calibration guide rail. The adjustment part is fixed on the inner tank during use. The adjustment parts on the calibration guide rails of the same pair are arranged correspondingly. The welding head is arranged on the welding seat and is used for welding the longitudinal seam. Two calibration seats are arranged on the welding seat. The two calibration seats are symmetrically arranged with respect to the longitudinal seam and are respectively movably sleeved on the calibration guide rails of the same pair. The distance between the two calibration seats is smaller than the distance between the calibration guide rails of the same pair. The adjustment mechanism is used to proportionally adjust the distance between the calibration guide rails of the same pair according to the width of the longitudinal seam, so that the longitudinal seam can be narrowed through the calibration seats, which is beneficial to improving the welding quality.

Description

Technical Field

[0001] The present invention relates to the technical field of auxiliary welding equipment for cryogenic storage tanks, and particularly to a longitudinal seam welding tooling for the inner tank of a cryogenic storage tank. Background Art

[0002] A cryogenic storage tank is a device used for storing and transporting cryogenic liquids such as liquid oxygen, nitrogen, argon, carbon dioxide, liquefied natural gas (LNG), etc. It has the characteristics of high efficiency, safety, economy, etc., and is widely used in the fields of energy, chemical industry, medical treatment, scientific research, etc.

[0003] In terms of structure, a cryogenic storage tank generally adopts a double-layer vacuum insulation structure and mainly consists of an inner tank and an outer tank. Among them, the inner tank is in direct contact with the cryogenic liquid and has good low-temperature tolerance and corrosion resistance. The outer tank plays a role of protection and support. In the sandwich space between the inner tank and the outer tank, adiabatic materials such as perlite sand, aluminum foil or thermal insulation cotton are usually filled, and at the same time, this sandwich is pumped to a high vacuum state to achieve the vacuum insulation effect, effectively maintaining the low-temperature environment inside the cryogenic storage tank, reducing the heat transfer, and reducing the evaporation loss of the cryogenic liquid.

[0004] In the manufacturing process of the inner tank of a cryogenic storage tank, there are currently two main forming methods: one is to bend a single sheet into a specific arc by a professional device, then use a tooling to fix it, and then perform welding operations along the longitudinal seam to complete the forming of the inner tank; the other method is to bend multiple sheets into arc shapes respectively, arrange them side by side according to the design requirements, also fix them with a tooling, and then first perform circumferential seam welding and then longitudinal seam welding. This welding sequence can effectively prevent excessive stress accumulation and ensure the structural strength and stability of the inner tank.

[0005] However, there are also some problems in the actual use of the existing tooling equipment: when fixing the bent sheet, it is difficult for the tooling equipment to accurately align the two ends of the sheet. This alignment deviation directly leads to the longitudinal seam width exceeding the ideal range in the subsequent welding process, forming a large longitudinal seam, which will not only reduce the connection strength at the welding joint, making the inner tank of the cryogenic storage tank prone to cracking and other safety hazards due to pressure during use, but also affect the overall sealing performance of the cryogenic storage tank, resulting in a risk of leakage of the cryogenic liquid, easily causing economic losses and safety accidents. Summary of the Invention

[0006] Based on this, it is necessary to provide a longitudinal seam welding tooling for the inner tank of a cryogenic storage tank to solve the problem that the existing tooling equipment cannot accurately align the longitudinal seam during use.

[0007] The above object is achieved by the following technical solutions:

[0008] A longitudinal seam welding tooling for the inner tank of a cryogenic storage tank, the longitudinal seam welding tooling for the inner tank of the cryogenic storage tank being configured to assist the welding of a welding head, the welding head being configured to weld the longitudinal seam; the longitudinal seam welding tooling for the inner tank of the cryogenic storage tank includes:

[0009] A machine base;

[0010] A support structure, provided on the machine base and configured to support the inner tank;

[0011] At least one pair of calibration guide rails. When there are multiple pairs of calibration guide rails, the multiple pairs of calibration guide rails are arranged in a direction parallel to the axis direction of the inner tank. The calibration guide rails of the same pair are symmetrically arranged on both sides of the longitudinal seam. The calibration guide rails extend in a direction parallel to the axis direction of the inner tank, and the calibration guide rails can slide in a direction perpendicular to their own extension direction; at least one adjustment part is provided on each calibration guide rail. The adjustment part is fixed on the inner tank during use. The adjustment parts on the calibration guide rails of the same pair are correspondingly arranged. When the number of adjustment parts on the same calibration guide rail is multiple, the multiple adjustment parts are spaced apart along the extension direction of the calibration guide rail;

[0012] A welding seat, provided on the machine base and capable of sliding in a direction parallel to the axis direction of the inner tank; two calibration seats are provided on the welding seat; the two calibration seats are symmetrically arranged with respect to the longitudinal seam and are respectively movably sleeved on the calibration guide rails of the same pair. The distance between the two calibration seats is less than the distance between the calibration guide rails of the same pair; the welding head is provided on the welding seat;

[0013] An adjusting mechanism, configured to proportionally adjust the distance between the calibration guide rails of the same pair according to the width of the longitudinal seam.

[0014] Further, the adjusting mechanism includes an induction component and a control component. The induction component is configured to sense the width of the longitudinal seam; the control component is configured to drive the calibration guide rails of the same pair to move away from each other according to the width of the longitudinal seam.

[0015] Further, the induction component includes an induction head. The induction head is provided on the welding seat, in front of the welding head, and can elastically slide in a direction perpendicular to the axis direction of the inner tank. The induction head is inserted into the longitudinal seam during use and forms a stop fit with the inner tank.

[0016] Further, an elastic member is connected between the induction head and the welding seat. Under the action of the elastic member, the induction head has a tendency to be inserted into the longitudinal seam.

[0017] Further, the elastic member is a first compression spring.

[0018] Further, the control component includes a slider and a clamping block. The slider is arranged on each of the adjusting parts. The slider and the sensing head form a stop fit and can slide in a direction perpendicular to the extending direction of the calibration guide rail. A rack is fixedly arranged on each of the sliders. The rack extends in a direction perpendicular to the extending direction of the calibration guide rail. A gear is arranged on each of the adjusting parts. The gear meshes with the rack and can rotate around its own axis and move along its own axis direction. A guide rod is fixedly inserted into each of the gears. The guide rod and the adjusting part form a threaded fit. A clamping block is arranged on each of the adjusting parts. The clamping block can slide in a direction perpendicular to the extending direction of the calibration guide rail, is fixedly arranged on the calibration guide rail, and is rotatably arranged on the guide rod.

[0019] Further, the welding head can move in a direction perpendicular to the axis direction of the inner tank to adapt to inner tanks with different diameters.

[0020] Further, the adjusting part is an electromagnet structure.

[0021] Further, the adjusting part is a vacuum chuck structure.

[0022] Further, the adjusting part includes two clamping pieces which are respectively fixedly clamped on the inner and outer sides of the inner tank.

[0023] The beneficial effects of the present invention are as follows:

[0024] During the use of the longitudinal seam welding tooling for the inner tank of the cryogenic storage tank provided by the present invention, first, the plate bent into an arc shape is placed on the supporting structure. Then, the calibration guide rail is placed on the inner tank through the adjusting part, and the distance between the same pair of calibration guide rails is made greater than the distance between the two calibration seats. Then, the welding seat is driven to slide in a direction parallel to the axis direction of the inner tank, and at the same time, the longitudinal seam is welded by the welding head. During the movement of the welding seat, the distance between the same pair of calibration guide rails is adjusted proportionally according to the width of the longitudinal seam through the adjusting mechanism, so that when the calibration seat passes through the same pair of calibration guide rails, the two ends of the plate can be driven to approach each other through the calibration guide rail and the adjusting part, thereby not only being able to narrow the longitudinal seam and improve the welding quality when the welding head welds, but also being able to inwardly press the two ends of the plate, so that after the welding is completed, when the two ends of the plate reset under the action of stress, the whole plate can approach a circular shape, improving the product quality. Description of the Drawings

[0025] Figure 1 Schematic three-dimensional structure of the longitudinal seam welding tooling for the inner tank of the cryogenic storage tank provided by the embodiment of the present invention Figure 1 ;

[0026] Figure 2For Figure 1 Partial enlarged structural schematic diagram at position A in

[0027] Figure 3 Stereoscopic structural schematic diagram of the longitudinal seam welding tooling for the inner tank of a cryogenic storage tank provided by an embodiment of the present invention Figure 2 ;

[0028] Figure 4 For Figure 3 Partial enlarged structural schematic diagram at position B in

[0029] Figure 5 Side view structural schematic diagram of the longitudinal seam welding tooling for the inner tank of a cryogenic storage tank provided by an embodiment of the present invention

[0030] Figure 6 For Figure 5 Cross-sectional view taken along the C-C direction in

[0031] Figure 7 Stereoscopic sectional structural schematic diagram of the longitudinal seam welding tooling for the inner tank of a cryogenic storage tank provided by an embodiment of the present invention

[0032] Figure 8 For Figure 7 Partial enlarged structural schematic diagram at position D in

[0033] Wherein:

[0034] 1. Machine base; 101. Slide rail;

[0035] 2. Support structure; 2011. First base; 2012. Mounting seat; 2013. Triangular plate; 2014. Roller;

[0036] 3. Alignment guide rail;

[0037] 4. Adjusting part; 401. Second chute;

[0038] 5. Welding seat; 501. Alignment seat; 502. Vertical rod; 503. Cross beam;

[0039] 601. Induction component; 6011. Induction head; 60111. Flap; 6012. First compression spring; 602. Control component; 6021. Slide block; 60211. Inclined surface; 6022. Clamping block; 6023. Rack; 6024. Gear; 6025. Guide rod;

[0040] 7. Welding head;

[0041] 8. Plate. Specific implementation manner

[0042] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0043] The serial numbers assigned to components in this document itself, such as "first", "second", etc., are only used to distinguish the objects described and do not have any sequential or technical meaning. The terms "connection" and "coupling" as used herein, unless otherwise specified, both include direct and indirect connection (coupling). In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0044] In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0045] Such as Figures 1 to 8As shown in the figure, the longitudinal seam welding tooling for the inner tank of the cryogenic storage tank provided by an embodiment of the present invention is configured to assist the welding of the welding head 7, and the welding head 7 is configured to weld the longitudinal seam; the longitudinal seam welding tooling for the inner tank of the cryogenic storage tank is provided to include a machine base 1, a support structure 2, at least a pair of calibration guide rails 3, a welding seat 5 and an adjustment mechanism. Among them, the support structure 2 is arranged on the machine base 1 and is configured to support the inner tank; when there are multiple pairs of calibration guide rails 3, the multiple pairs of calibration guide rails 3 are arranged in a direction parallel to the axis direction of the inner tank. The calibration guide rails 3 of the same pair are symmetrically arranged on both sides of the longitudinal seam. The calibration guide rails 3 extend in a direction parallel to the axis direction of the inner tank, and the calibration guide rails 3 can slide in a direction perpendicular to their own extension direction; at least one adjustment part 4 is arranged on each calibration guide rail 3. The adjustment part 4 is fixed on the inner tank during use. The adjustment parts 4 on the calibration guide rails 3 of the same pair are correspondingly arranged. When the number of adjustment parts 4 on the same calibration guide rail 3 is multiple, the multiple adjustment parts 4 are arranged at intervals along the extension direction of the calibration guide rail 3; the welding seat 5 is arranged on the machine base 1 and can slide in a direction parallel to the axis direction of the inner tank; two calibration seats 501 are arranged on the welding seat 5; the two calibration seats 501 are symmetrically arranged with respect to the longitudinal seam and are respectively movably sleeved on the calibration guide rails 3 of the same pair. The distance between the two calibration seats 501 is less than the distance between the calibration guide rails 3 of the same pair; the welding head 7 is arranged on the welding seat 5; the adjustment mechanism is configured to be able to proportionally adjust the distance between the calibration guide rails 3 of the same pair according to the width of the longitudinal seam.

[0046] Taking the inner tank being placed horizontally during welding as an example, the longitudinal seam on the inner tank is arranged upward and extends in the left - right direction; specifically in this embodiment, the calibration guide rails 3 are arranged on the outer peripheral wall of the top of the inner tank during installation, are spaced from the inner tank, and extend in the left - right direction. The two calibration guide rails 3 of the same pair are located on the left and right sides of the longitudinal seam. The adjustment part 4 can be set as an electromagnet structure and is arranged on the outer peripheral wall of the top of the inner tank during installation, and when in use, an electric current is passed through its interior to generate a magnetic field, ensuring that it can have a magnetic connection with the inner tank and can be fixed on the outer peripheral wall of the top of the inner tank under the action of magnetic force, while supporting the calibration guide rail 3.

[0047] The base 1 is in a plate-like structure and is horizontally arranged during installation. The support structure 2 can be set to include two or more support components. The multiple support components are arranged side by side and spaced apart in the front-rear direction. Each support component includes a first base 2011. The first base 2011 is in a strip-like structure and extends in the left-right direction, and is arranged on the upper plate surface of the base 1. Mounting seats 2012 are arranged at both ends of the top of the first base 2011. Two triangular plates 2013 are arranged on each mounting seat 2012. One of the angles of the triangular plate 2013 is hinged to the mounting seat 2012, and the plate surface of the triangular plate 2013 is perpendicular to the plate surface of the base 1. The two triangular plates 2013 are arranged at intervals and corresponding to each other in the front-rear direction. Two rollers 2014 are hinged between the two triangular plates 2013 on the same mounting seat 2012. The two rollers 2014 are respectively located at the other two angles of the triangular plate 2013 and can simultaneously form a rolling fit with the outer peripheral wall of the inner tank to ensure that the inner tank can be supported circumferentially.

[0048] The welding seat 5 has a vertical rod 502 and a cross beam 503. The vertical rod 502 extends in the up-down direction and is arranged on the top plate surface of the base 1. The cross beam 503 extends in the left-right direction and is perpendicularly arranged to the vertical rod 502 and is close to the top of the vertical rod 502. The left end of the cross beam 503 is suspended above the longitudinal seam. The alignment seat 501 and the welding head 7 are both located at the left end of the cross beam 503 during installation, which not only ensures that the alignment seat 501 can form a movable fit with the two alignment guide rails 3 of the same pair, but also ensures that the welding head 7 can weld the longitudinal seam. The two alignment seats 501 are located on the left and right sides of the longitudinal seam.

[0049] To facilitate the formation of a movable fit with the alignment guide rail 3, a first sliding groove is arranged at the bottom of the alignment seat 501. The first sliding groove extends in the front-rear direction and is sleeved on the outer side of the top of the alignment guide rail 3 during installation. The first sliding groove is in a flared structure with the large mouth at the bottom, ensuring that the alignment guide rail 3 can still be located in the area where the first sliding groove is located after the alignment guide rail 3 moves, so as to ensure that the alignment guide rail 3 can still cooperate with the first sliding groove when the alignment seat 501 moves onto the alignment guide rail 3.

[0050] To facilitate the guiding of the sliding of the welding seat 5, two slide rails 101 are arranged on the top plate surface of the base 1. The two slide rails 101 are both located on the right side of the support structure 2. The two slide rails 101 are arranged at intervals in the left-right direction. The slide rails 101 extend in the front-rear direction. During installation, the vertical rod 502 of the welding seat 5 is simultaneously slidably sleeved on the two slide rails 101 to ensure that it can slide in the direction parallel to the axis of the inner tank under the guidance of the slide rails 101.

[0051] During use, first place the arc-shaped plate 8 on the roller 2014. At this time, under the action of multiple support components, the plate 8 is supported by multiple points along the circumferential direction along the axial direction, ensuring that the position of the plate 8 is fixed and the force is evenly distributed. Then place the adjustment part 4 on the inner tank, and by passing an electric current into the adjustment part 4 to generate a magnetic field, make the adjustment part 4 magnetically connected to the inner tank, and ensure that the adjustment part 4 is fixed on the outer peripheral wall of the top of the inner tank under the action of magnetic force. Then place the calibration guide rail 3 on the adjustment part 4, and ensure that the distance between the same pair of calibration guide rails 3 is greater than the distance between the two calibration seats 501.

[0052] Exemplarily, the distance between the two calibration seats 501 can be set to 50 cm; initially, the distance between the two calibration guide rails 3 of the same pair can be set to 50.1, 50.2 or 50.5 cm, etc.

[0053] Next, drive the welding seat 5 to slide along the slide rail 101. During the sliding of the welding seat 5, under the action of the adjustment mechanism, the distance between the same pair of calibration guide rails 3 is adjusted proportionally according to the width of the longitudinal seam, so that when the width of the longitudinal seam is 0, the distance between the same pair of calibration guide rails 3 remains unchanged. Then, when the calibration seat 501 passes through the same pair of calibration guide rails 3, the two ends of the plate 8 are driven to abut against each other through the calibration guide rail 3 and the adjustment part 4, and the abutting force is F, improving the quality of the welding head 7 during welding; when the width of the longitudinal seam is larger, when the calibration seat 501 passes through the same pair of calibration guide rails 3, the distance that the two ends of the plate 8 are driven to move through the calibration guide rail 3 and the adjustment part 4 is larger, and since the distance between the two calibration seats 501 remains unchanged, finally the two ends of the plate 8 abut against each other, and the abutting force is F, avoiding excessive welding stress caused by excessive abutting force at both ends of the plate 8 and ensuring the welding quality; similarly, when the width of the longitudinal seam is smaller, when the calibration seat 501 passes through the same pair of calibration guide rails 3, the distance that the two ends of the plate 8 are driven to move through the calibration guide rail 3 and the adjustment part 4 is smaller, and since the distance between the two calibration seats 501 remains unchanged, finally the two ends of the plate 8 abut against each other, and the abutting force is F, avoiding excessive welding stress caused by excessive abutting force at both ends of the plate 8 and ensuring the welding quality.

[0054] In addition, during the process of the calibration seat 501 driving the calibration guide rail 3 to move, the calibration seat 501 synchronously bends the calibration guide rail 3 inward, and the calibration guide rail 3 synchronously drives the end of the plate 8 to bend inward through the adjustment part 4, so that after welding is completed, when the two ends of the plate 8 reset under the action of stress, it promotes the whole plate 8 to approach a circular shape, improving the product quality.

[0055] In some embodiments, the adjustment mechanism is set to include an induction component 601 and a control component 602. The induction component 601 is configured to be able to sense the width of the longitudinal seam; the control component 602 is configured to be able to drive the same pair of calibration guide rails 3 to move away from each other according to the width of the longitudinal seam.

[0056] During use, first, the sensing assembly 601 senses the width of the longitudinal seam, and then the control assembly 602 drives the correction guide rails 3 of the same pair away from each other according to the width of the longitudinal seam sensed by the sensing assembly 601. Since the distance between the correction guide rails 3 of the same pair is greater than the distance between the two correction seats 501 initially, after the correction guide rails 3 of the same pair move away from each other, the distance between the correction guide rails 3 of the same pair is still greater than the distance between the two correction seats 501. As a result, when the correction seat 501 passes through the correction guide rails 3 of the same pair, the two ends of the plate 8 can be driven closer to each other by the correction guide rails 3 and the adjustment portion 4, thereby reducing the longitudinal seam and improving the welding quality during the welding of the welding head 7.

[0057] Furthermore, the sensing assembly 601 is provided to include a sensing head 6011. The sensing head 6011 is arranged on the welding seat 5, in front of the welding head 7, and can elastically slide in a direction perpendicular to the axis of the inner tank. When in use, the sensing head 6011 is inserted into the longitudinal seam and forms a stop fit with the inner tank.

[0058] Specifically in this embodiment, the sensing head 6011 has an I-shaped structure, extends in the up and down direction, and is arranged at the left end of the cross beam 503. A tapered block is arranged at the bottom of the sensing head 6011. The arrangement of the tapered block ensures that the sensing head 6011 can be inserted into the longitudinal seam, facilitating the real-time sensing of the width of the longitudinal seam.

[0059] Furthermore, to facilitate the elastic sliding of the sensing head 6011 in a direction perpendicular to the axis of the inner tank, an elastic member is connected between the sensing head 6011 and the welding seat 5. Under the action of the elastic member, the sensing head 6011 has a tendency to be inserted into the longitudinal seam, ensuring that the sensing head 6011 can always abut against the longitudinal seam, facilitating the real-time sensing of the width of the longitudinal seam.

[0060] Specifically in this embodiment, the elastic member is a first compression spring 6012, and it extends in the up and down direction during installation. The upper and lower ends of the first compression spring 6012 are respectively arranged on the sensing head 6011 and the welding seat 5. Under the action of the first compression spring 6012, the sensing head 6011 has a tendency to be inserted into the longitudinal seam, facilitating the real-time sensing of the width of the longitudinal seam.

[0061] Further, the control component 602 is set to include a slider 6021 and a clamping block 6022. A slider 6021 is provided on each adjustment part 4. The slider 6021 and the induction head 6011 form a stop fit and can slide in a direction perpendicular to the extension direction of the calibration guide rail 3; a rack 6023 is fixedly provided on each slider 6021, and the rack 6023 extends in a direction perpendicular to the extension direction of the calibration guide rail 3; a gear 6024 is provided on each adjustment part 4, the gear 6024 meshes with the rack 6023, and can both rotate around its own axis and move along its own axis direction; a guide rod 6025 is fixedly inserted into each gear 6024, and the guide rod 6025 forms a threaded fit with the adjustment part 4; a clamping block 6022 is provided on each adjustment part 4, the clamping block 6022 can slide in a direction perpendicular to the extension direction of the calibration guide rail 3, and is fixedly provided on the calibration guide rail 3 and rotatably provided on the guide rod 6025.

[0062] Specifically in this embodiment, the slider 6021 is of a C-shaped structure and is abutted against the inner side wall of the adjustment part 4, and the opening of the slider 6021 faces inward; to facilitate the sliding fit with the slider 6021, a second chute 401 is provided on the inner side wall of the adjustment part 4, and the second chute 401 extends in a direction perpendicular to the extension direction of the calibration guide rail 3. When installed, the slider 6021 is slidably inserted into the second chute 401; to facilitate the stop fit between the slider 6021 and the induction head 6011, stop pieces 60111 are provided on the left and right side walls of the large end of the induction head 6011. The stop pieces 60111 can be inserted into the opening of the slider 6021 to drive the slider 6021 to slide up and down along the second chute 401. Eight-shaped inclined surfaces 60211 are provided at the top and bottom of the opening of the slider 6021, and the inclined surfaces 60211 are configured to be able to guide the stop pieces 60111 into the opening of the slider 6021.

[0063] The rack 6023 is provided on the front side wall of the slider 6021. The gear 6024 is provided on the inner side wall of the adjustment part 4 and is located in front of the slider 6021 to ensure that it can mesh with the rack 6023 and can also support the slider 6021. The outer end of the guide rod 6025 is rotatably inserted into the clamping block 6022. To facilitate the installation and guiding of the sliding of the clamping block 6022, a third chute is provided at the top of the adjustment part 4, and the third chute extends in a direction perpendicular to the extension direction of the calibration guide rail 3. When installed, the clamping block 6022 is slidably inserted into the third chute to ensure that the clamping block 6022 can drive the calibration guide rail 3 to move synchronously when the guide rod 6025 moves.

[0064] During the movement of the welding base 5, the induction head 6011 first inserts into the longitudinal seam, and the baffle 60111 is located at a relatively lower position; when the induction head 6011 moves to the adjustment part 4, as the welding base 5 moves, the baffle 60111 inserts into the opening of the slider 6021 through the inclined surface 60211, synchronously driving the slider 6021 to move downward along the second chute 401. When the slider 6021 moves, it synchronously drives the rack 6023 to move downward. When the rack 6023 moves, it drives the gear 6024 to rotate through the meshing with the gear 6024. When the gear 6024 rotates, it synchronously drives the guide rod 6025 to rotate. When the guide rod 6025 rotates, it moves outward synchronously through the thread between the guide rod 6025 and the adjustment part 4. When the guide rod 6025 moves, it drives the calibration guide rail 3 to move outward along the third chute through the clamp 6022, so as to proportionally increase the distance between the same pair of calibration guide rails 3.

[0065] When the calibration base 501 passes through the same pair of calibration guide rails 3, the calibration base 501 drives the two ends of the plate 8 to approach each other through the clamp 6022 and the guide rod 6025, and through the thread fit between the guide rod 6025 and the adjustment part 4, so as to be able to narrow the longitudinal seam and improve the quality during the welding of the welding head 7.

[0066] In other embodiments, it can also be set that the gear 6024 is rotatably arranged on the inner side wall of the adjustment part 4, the guide rod 6025 is inserted into the gear 6024, and a sliding convex is arranged on the guide rod 6025, and a fourth chute is arranged on the gear 6024. The sliding convex is slidably inserted into the fourth chute during installation, so that the guide rod 6025 can not only rotate synchronously with the gear 6024, but also move axially relative to the gear 6024. Thus, during the movement of the welding base 5, when the slider 6021 moves, it synchronously drives the rack 6023 to move downward. The rack 6023 drives the gear 6024 to rotate through the meshing with the gear 6024. The gear 6024 synchronously drives the guide rod 6025 to rotate through the clamping connection between the sliding convex and the fourth chute. The guide rod 6025 synchronously moves outward through the thread fit between the guide rod 6025 and the adjustment part 4, and further drives the calibration guide rail 3 to move outward along the third chute through the clamp 6022, so as to proportionally increase the distance between the same pair of calibration guide rails 3.

[0067] In a further embodiment, to better lock the position of the slider 6021, a plurality of balls are inserted into the inner side wall of the adjustment part 4. The plurality of balls are arranged at intervals along the extending direction parallel to the second chute 401. Each ball is connected to the adjustment part 4 through a second compression spring. Under the action of the second compression spring, the ball has a tendency to protrude from the adjustment part 4, so as to be able to abut against the slider 6021.

[0068] In some other embodiments, the welding head 7 can move in a direction perpendicular to the axis of the inner tank to adapt to inner tanks of different diameters.

[0069] Specifically in this embodiment, it is set that the vertical rod 502 can be telescoped in the up and down direction, so that the welding head 7 can be driven to move up and down, and then the inner tanks with different diameters can be welded, improving the applicability.

[0070] In other embodiments, the adjusting part 4 is a vacuum chuck structure. In this way, when the calibration guide rail 3 is installed on the inner tank, the vacuum chuck can form a negative pressure by pumping air inside, and tightly adsorb on the outer peripheral wall of the top of the inner tank. Since the adsorption force of the vacuum chuck is uniform and stable, it can ensure a firm connection between the calibration guide rail 3 and the inner tank, effectively avoiding the displacement of the calibration guide rail 3 due to factors such as vibration during the welding process. Compared with the electromagnet structure, the vacuum chuck is not affected by the magnetism of the inner tank material and can be applied to inner tanks of different materials, thereby expanding the application range of the welding tooling.

[0071] In some other embodiments, when the axial length of the inner tank is small, the adjusting part 4 is set to include two clamping pieces, and the two clamping pieces are respectively fixedly clamped on the inner and outer sides of the inner tank.

[0072] Specifically in this embodiment, to facilitate the fixation of the two clamping pieces, the adjusting part 4 includes a bolt and a nut. One of the clamping pieces is vertically fixed to the head of the bolt, the other clamping piece is slidably sleeved on the bolt, and the nut is threadedly sleeved on the bolt to ensure that the clamping pieces can be fixed.

[0073] In other embodiments, the support structure 2 can also be set as a strip-shaped square rod structure, extending in the left and right direction, and arranged on the top plate surface of the machine base 1. A V-shaped opening is provided at the top of the support structure 2, and the arc-shaped plate 8 is placed at the V-shaped opening during installation to ensure that the plate 8 can be supported circumferentially.

[0074] The technical features of the above embodiments can be combined arbitrarily. For the sake of brief description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0075] The above-described embodiments only represent several implementation manners of the present invention. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A longitudinal seam welding tooling for the inner tank of a low-temperature storage tank, characterized in that, The longitudinal seam welding tooling for the inner tank of the cryogenic storage tank is configured to assist the welding head in welding, and the welding head is configured to be able to weld the longitudinal seam; The longitudinal seam welding tooling for the inner tank of the cryogenic storage tank includes: A machine base; A support structure, which is arranged on the machine base and is configured to be able to support the inner tank; At least one pair of calibration guide rails. When there are multiple pairs of calibration guide rails, the multiple pairs of calibration guide rails are arranged in a direction parallel to the axis direction of the inner tank. The calibration guide rails of the same pair are symmetrically arranged on both sides of the longitudinal seam. The calibration guide rails extend in a direction parallel to the axis direction of the inner tank, and the calibration guide rails can slide in a direction perpendicular to their own extension direction; at least one adjustment part is arranged on each calibration guide rail. The adjustment part is fixed on the inner tank during use. The adjustment parts on the calibration guide rails of the same pair are correspondingly arranged. When the number of adjustment parts on the same calibration guide rail is multiple, the multiple adjustment parts are arranged at intervals along the extension direction of the calibration guide rail; A welding seat, which is arranged on the machine base and can slide in a direction parallel to the axis direction of the inner tank; two calibration seats are arranged on the welding seat; the two calibration seats are symmetrically arranged with respect to the longitudinal seam and are respectively movably sleeved on the calibration guide rails of the same pair. The distance between the two calibration seats is less than the distance between the calibration guide rails of the same pair; the welding head is arranged on the welding seat; An adjusting mechanism, which is configured to be able to proportionally adjust the distance between the calibration guide rails of the same pair according to the width of the longitudinal seam.

2. The longitudinal seam welding tooling for the inner tank of the cryogenic storage tank according to claim 1, characterized in that, The adjusting mechanism includes an induction component and a control component. The induction component is configured to be able to sense the width of the longitudinal seam; the control component is configured to be able to drive the calibration guide rails of the same pair to move away from each other according to the width of the longitudinal seam.

3. The longitudinal seam welding tooling for the inner tank of the cryogenic storage tank according to claim 2, wherein The induction component includes an induction head. The induction head is arranged on the welding seat and is located in front of the welding head and can elastically slide in a direction perpendicular to the axis direction of the inner tank. The induction head is inserted into the longitudinal seam during use and forms a stop fit with the inner tank.

4. The longitudinal seam welding tooling for the inner tank of the cryogenic storage tank according to claim 3, characterized in that, An elastic member is connected between the induction head and the welding seat. Under the action of the elastic member, the induction head has a tendency to be inserted into the longitudinal seam.

5. The longitudinal seam welding tooling for the inner tank of the cryogenic storage tank according to claim 4, characterized in that, The elastic member is a first compression spring.

6. The longitudinal seam welding tooling for the inner tank of the cryogenic storage tank according to claim 3, wherein The control component includes a slider and a clamping block. The slider is arranged on each adjustment part. The slider forms a stop fit with the induction head and can slide in a direction perpendicular to the extension direction of the calibration guide rail; a rack is fixedly arranged on each slider. The rack extends in a direction perpendicular to the extension direction of the calibration guide rail; a gear is arranged on each adjustment part. The gear meshes with the rack and can both rotate around its own axis and move along its own axis direction; a guide rod is fixedly inserted into each gear. The guide rod forms a threaded fit with the adjustment part; a clamping block is arranged on each adjustment part. The clamping block can slide in a direction perpendicular to the extension direction of the calibration guide rail and is fixedly arranged on the calibration guide rail and rotatably arranged on the guide rod.

7. The longitudinal seam welding tooling for the inner tank of the cryogenic storage tank according to claim 1, characterized in that, The welding head can move in a direction perpendicular to the axis of the inner tank to adapt to inner tanks of different diameters.

8. The longitudinal seam welding tooling for the inner tank of the cryogenic storage tank according to claim 1, characterized in that, The adjusting part is an electromagnet structure.

9. The longitudinal seam welding tooling for the inner tank of the cryogenic storage tank according to claim 1, characterized in that The adjusting part is a vacuum suction cup structure.

10. The longitudinal seam welding tooling for the inner tank of the cryogenic storage tank according to claim 1, wherein The adjusting part includes two clamping pieces which are respectively fixedly clamped on the inner and outer sides of the inner tank.

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