An assembly tooling and an assembly method

Abstract

The present invention discloses an assembly tooling and an assembly method for assembling a double-layer container with axial end support connection between an inner container and an outer container. The assembly tooling includes a base frame, a positioning assembly, and a height adjustment assembly. The base frame is provided with a horizontal base platform. The positioning assembly includes at least three locking members spaced apart on the horizontal base platform for circumferentially clamping and positioning the outer container at intervals along the outer container of the double-layer container. The height adjustment assembly includes a guide shaft provided on the base frame and a lifting mechanism acting on the inner container. The guide shaft is used for coaxially sleeving and mating with a first support portion connected to the first axial end of the inner container. The positioning center line of the positioning assembly is collinear with the axis of the guide shaft and perpendicular to the horizontal base platform. By respectively positioning the axes of the inner container and the outer container through the positioning assembly and the guide shaft, the coaxiality of the inner container and the outer container is directly ensured, realizing vertical assembly and solving the structural problem of difficult assembly of the two end heads of the double-layer horizontal container.

Description

Technical Field

[0001] The present invention relates to the technical field of double-layer horizontal containers, and particularly relates to an assembly tooling and an assembly method. Background Art

[0002] A double-layer horizontal container is a container that can be used to load cryogenic liquids. Generally, there are two structural forms of double-layer horizontal containers.

[0003] One type of double-layer horizontal container is positioned and connected by a support and fixation assembly disposed radially between the inner container and the outer container along the double-layer horizontal container. It is necessary to provide a number of support points radially on the inner container. After being supported and fixed with non-metallic materials such as fiberglass, an interlayer is formed by being spaced apart from the outer container. Then, the end heads can be assembled. Since support points are provided radially, it is more convenient to adopt a horizontal assembly process.

[0004] However, for another type of double-layer horizontal container that connects the inner container and the outer container by a two-end support structure, no support points are provided radially on the inner container when the inner container and the outer container are assembled. Therefore, it is impossible to assemble the end heads at both ends of the outer container while clamping and positioning the inner container, and there are technical problems such as difficulty in controlling the coaxiality between the inner container and the outer container and difficulty in forming the assembly. Summary of the Invention

[0005] To solve the above technical problems, the present invention provides an assembly tooling and an assembly method. For the assembly of a double-layer horizontal container with a two-end support structure, a vertical assembly solution is provided, without the need to provide process holes, process supports, and reinforcing plates on the outer container, ensuring the integrity and consistency of the outer container. The vertical assembly method is simple and reliable, and solves the structural problem of difficult assembly of the two end heads of the double-layer horizontal container.

[0006] A solution for achieving the technical object of the present invention is an assembly tooling for assembling a double-layer container. The double-layer container includes a nested inner container and outer container, and a first support portion and a second support portion respectively connected to both axial ends of the inner container and connecting the inner container and the outer container. The assembly tooling includes,

[0007] A base frame provided with a horizontal base;

[0008] A positioning assembly including at least three locking members spaced apart on the horizontal base for circumferentially clamping and positioning the outer container at intervals;

[0009] A height adjustment assembly including a guide shaft and a lifting mechanism acting on the inner container, both provided on the base frame. The guide shaft is used for sleeving and mating coaxially with the first support portion connected to the first axial end of the inner container;

[0010] Wherein, the positioning center line of the positioning component is collinear with the axis of the guiding shaft and perpendicular to the horizontal base.

[0011] In some embodiments, the number of the locking members is 2n, where n≥2, and every two of the locking members are oppositely arranged along a diameter of the guiding shaft.

[0012] In some embodiments, the number of the locking members is at least six, and the clamping action points of the at least six locking members are distributed in at least two layers along the axial direction of the guiding shaft.

[0013] In some embodiments, the assembly tooling further includes mounting brackets spaced on the horizontal base, and the locking members are respectively arranged on the horizontal base and the mounting brackets.

[0014] In some embodiments, the positioning component further includes a support ring arranged on the horizontal base for positioning the first head of the outer container;

[0015] In the radial direction of the guiding shaft, the support ring is arranged inside the locking members, and the center of the support ring is located on the axis of the guiding shaft.

[0016] In some embodiments, a ring groove is arranged on the horizontal base, and the support ring is arranged in the ring groove and protrudes from the horizontal base.

[0017] In some embodiments, a sinking groove for accommodating part of the head is further arranged on the horizontal base, and in the radial direction of the guiding shaft, the sinking groove is located inside the ring groove.

[0018] In some embodiments, the lifting mechanism is connected to the guiding shaft, and a limiting portion for axially supporting and limiting the inner container is arranged on the guiding shaft.

[0019] Based on the same inventive concept, the present invention further provides an assembly method for a double-layer container based on the above-mentioned assembly tooling. The outer container includes a shell and a first head and a second head assembled at both ends of the shell. The assembly method includes the following steps:

[0020] Fix the shell assembled with the first head on the horizontal base through the positioning component;

[0021] Place the inner container into the shell, and make the first support portion connected to the first end of the inner container be sleeved and fitted coaxially with the guiding shaft of the height adjustment component;

[0022] Assemble the second head onto the shell;

[0023] Lift the inner container through the lifting mechanism, adjust the position of the inner container in the height direction relative to the second head, connect and fix the second head and the second support part connected to the second end of the inner container, and connect and fix the first head and the first support part to complete the sleeving of the outer container and the inner container;

[0024] Seal the outer container and the inner container to obtain the double-layer container.

[0025] In some embodiments, fixing the outer container to the horizontal base through the positioning assembly specifically includes welding the housing and the first head into one body, placing the whole on the horizontal base, and positioning the housing and the first head through at least three locking members arranged at intervals along the circumferential direction of the housing of the positioning assembly;

[0026] Placing the inner container into the housing specifically includes placing the inner container into the housing from top to bottom.

[0027] In some embodiments, the first support part includes a cooperating upper support block and a lower support block, and the upper support block is connected to the inner container;

[0028] Before placing the inner container into the housing, the assembly method further includes sleeving the lower support block on the guide shaft and axially positioning it;

[0029] Placing the inner container into the housing and making the first support part connected to the first end of the inner container sleeved and cooperated coaxially with the guide shaft of the height adjustment assembly specifically includes placing the inner container into the outer container and making the central hole of the upper support block cooperate with the guide shaft;

[0030] Lifting the inner container through the lifting mechanism, adjusting the position of the inner container in the height direction relative to the second head, connecting and fixing the second head and the second support part connected to the second end of the inner container, and connecting and fixing the first head and the first support part specifically includes lifting the inner container through the lifting mechanism, adjusting the inner container to make the relative position of the second support part and the second head qualified, connecting and fixing the second head and the second support part; and adjusting the relative position of the first support part and the first head and connecting and fixing the first head and the first support part.

[0031] As can be seen from the above technical solution, an assembly tooling for assembling a double-layer container provided by the present invention includes a base frame, a positioning component for fixing an outer container, and a height adjustment component for positioning an inner container and adjusting the axial relative position between the inner container and the outer container. Among them, the base frame is provided with a horizontal base platform for supporting the shaft ends of the outer container and the assembled double-layer container. The positioning component includes at least three locking members spaced on the horizontal base platform for circumferentially clamping and positioning the outer container at intervals. The positioning component ensures that the outer container does not flip or tilt during the assembly process and after the inner container is fixed to the outer container. A first support portion is coaxially connected to the axial first end of the inner container. The height adjustment component is coaxially inserted into the first support portion through a guide shaft whose axis is collinear with the positioning center line of the positioning component, thereby realizing the positioning of the axis position of the inner container, directly ensuring the coaxiality between the inner container and the outer container. At the same time, the axial height position of the inner container is adjusted through a lifting mechanism, which can meet the assembly requirements of different sizes, ensure the adjustment of the relative position dimensions during the sleeving process of the inner container and the outer container, can adapt to a certain extent the gap deviation caused by the position offset during the assembly process and the dimensional deviation of itself, and ensure that the size of the assembled finished product meets the requirements.

[0032] That is, the present invention provides an assembly tooling and an assembly method for realizing the vertical assembly of a double-layer container for the assembly of a double-layer container with the shaft ends of the inner container and the outer container supported and fixed. After the shell of the outer container is connected to the first head, the whole is vertically positioned on the horizontal base platform through the locking members. Since the inner container and the outer container are respectively positioned by the positioning component and the guide shaft with coincident centers, the coaxiality between the inner container and the outer container during the initial assembly is directly ensured. Then, the adjustment and fixation of the corresponding positions of the shell and the second head at the other end, as well as the first support portion and the second support portion on the inner container and the first head and the second head can be carried out. Compared with the prior art in which the double-layer container is assembled horizontally and holes need to be opened in the outer container cylinder to clamp the inner container, the present application can complete the assembly of the inner container and the outer container of the double-layer container with support structures at both axial ends without setting process support plates, reinforcing plates and other structures inside the outer container, that is, canceling the process holes, process supports and reinforcing plates, ensuring the integrity and consistency of the outer container. By using this assembly tooling, the structural problem of difficult assembly of the two heads of the double-layer horizontal container is solved, and the vertical assembly method is simple and reliable. Compared with the horizontal assembly, the production efficiency is greatly improved, which is beneficial to the mass production of the tank body. Brief Description of the Drawings

[0033] Figure 1 It is a top view of the assembly tooling provided in Embodiment 1 of the present invention in the use state (the double-layer container is not shown in the figure);

[0034] Figure 2 It is Figure 1 The schematic view of A-A after setting the double-layer container in it;

[0035] Figure 3 is Figure 2 an enlarged schematic view of

[0036] Description of the drawings: 10 - base frame, 11 - horizontal base, 12 - sinking groove; 20 - positioning assembly, 21 - locking part, 22 - support ring; 30 - height adjustment assembly, 31 - guide shaft, 32 - lifting mechanism, 40 - mounting bracket;

[0037] 50 - inner container, 60 - outer container, 61 - housing, 62 - first head, 63 - second head, 70 - first support part, 71 - upper support block, 72 - lower support block, 80 - second support part. Detailed implementation manners

[0038] In order to enable those skilled in the art in the technical field to which the present application belongs to more clearly understand the present application, the technical solution of the present application will be described in detail below with reference to the drawings and through specific embodiments.

[0039] In order to solve the technical problems that in the prior art, for a double - layer horizontal container with axial - end connection and fixation, it is difficult to control the coaxiality between the inner container and the outer container and difficult to assemble and form, the present invention provides an assembly tooling and an assembly method, which do not require process holes, process supports and reinforcing plates to be provided on the outer container, ensure the integrity and consistency of the outer container, and the vertical assembly method is simple and reliable, solving the structural problem of difficult assembly of the two heads of the double - layer horizontal container. The following introduces the content of the present invention in detail through 2 specific embodiments:

[0040] such as Figures 1-3As shown in the figure, this embodiment provides an assembly tooling for vertically assembling a double-layer container. The double-layer container includes an inner container 50 and an outer container 60 that are sleeved together, and a first support portion 70 and a second support portion 80 that are respectively connected to both axial ends of the inner container 50 and connect the inner container 50 and the outer container 60. The assembly tooling includes a base frame 10, a positioning assembly 20 for fixing the outer container 60, and a height adjustment assembly 30 for positioning the inner container 50 and adjusting the axial relative position between the inner container 50 and the outer container 60. Among them, the base frame 10 is provided with a horizontal base 11 for supporting the axial end of the outer container 60 and the axial end of the assembled double-layer container; the positioning assembly 20 includes at least three locking members 21 spaced on the horizontal base 11 for circumferentially and spacedly clamping and positioning the outer container 60 along the outer container 60 of the double-layer container; the positioning assembly 20 ensures that the outer container 60 does not flip or tilt during the assembly process and after the inner container 50 and the outer container 60 are fixed. The height adjustment assembly 30 includes a guiding shaft 31 and a lifting mechanism 32 acting on the inner container 50, both of which are provided on the base frame 10. The guiding shaft 31 is used for coaxial sleeve fitting with the first support portion 70 connected to the first axial end of the inner container 50. And the positioning center line of the positioning assembly 20 is collinear with the axis of the guiding shaft 31 and perpendicular to the horizontal base 11. That is, the height adjustment assembly 30 coaxially penetrates through the first support portion 70 through the guiding shaft 31, thereby realizing the positioning of the axis position of the inner container 50, directly ensuring the coaxiality between the inner container 50 and the outer container 60. At the same time, the axial height position of the inner container 50 is adjusted through the lifting mechanism 32. And when the inner container 50 is at different height positions, the first support portion 70 is always sleeved and fitted with the guiding shaft 31, always ensuring the coaxiality between the inner container 50 and the outer container 60; and because the height position is adjustable, it can meet the assembly requirements of different sizes, and ensures the relative position dimension adjustment requirements during the sleeving process of the housing 61 of the inner container 50 and the outer container 60, and can adapt to the position offset during the assembly process and the gap deviation caused by the deviation of its own size to a certain extent, ensuring that the size of the assembled finished product meets the requirements.

[0041] In this embodiment, the number of the locking members 21 is not specifically limited. The number of the locking members 21 is at least three, as long as it can ensure clamping the housing 61 and limiting the position during the assembly process, as long as it can ensure that the axis of the outer container 60 does not shift relative to the axis of the inner container 50 and can stably support the outer container 60 during the assembly process. For example, when the number of the locking members 21 is three, to avoid two locking members 21 being located under the same diameter of the housing 61. In some embodiments, in the radial plane of the double-layer container, the included angle between adjacent two locking members is not less than 90° or the included angle between at least one locking member and the adjacent two locking members is not less than 90°. This embodiment does not make specific limitations.

[0042] This embodiment does not limit the structure of the locking member 21 either. In some embodiments, the locking member 21 can be an electric telescopic member. In some embodiments, as Figures 1-3 shown, the locking member 21 can also include a fixed seat and a screw rod connected by threads. The screw rod is arranged on the horizontal base 11 through the fixed seat. The screw rod passes through the telescopic fixed seat, and the position of the end of the screw rod abutted against the housing 61 can be adjusted by rotation. Preferably, the axis of the screw rod is perpendicular to the axis of the guide shaft 31, that is, each screw rod is arranged along the radial direction of the housing 61 of the outer container 60.

[0043] To simplify the structure and ensure the stable positioning of the outer container 60, in this embodiment, the number of the locking members 21 is 2n, where n≥2, and every two locking members 21 are oppositely arranged along a diameter of the guide shaft 31.

[0044] To further ensure the coaxiality and at the same time ensure that the inner container 50 and the housing 61 do not flip or tilt during the assembly process, as a preferred embodiment, in this embodiment, the number of the locking members 21 is at least 6. The clamping action points of at least 6 locking members 21 are distributed in at least two layers along the axial direction of the guide shaft 31 to axially abut against the housing 61 at multiple points at intervals, ensuring the stable positioning of the end far from the horizontal base 11 and avoiding the deviation of the axis of the housing 61 of the outer container 60.

[0045] This embodiment does not specifically limit the specific implementation manner in which the clamping action points of the locking member 21 are distributed in at least two layers in the height direction. For example, in some embodiments, the locking member 21 can have different height specifications, so that the locking members 21 all arranged on the horizontal base 11 can contact different axial positions of the housing 61; for another example, in some embodiments, to ensure modular production, the structures and height specifications of all the locking members 21 are the same. As Figures 1-3 shown, the assembly tooling further includes mounting brackets 40 spaced on the horizontal base 11. The locking members 21 are respectively arranged on the horizontal base 11 and the mounting brackets 40, and the mounting height of the locking members 21 is changed through the mounting brackets 40.

[0046] As Figure 2 and Figure 3 shown, as an embodiment, the locking members 21 are arranged on the base frame 10 in a two-layer distribution form, with one layer of locking members 21 arranged on the mounting brackets 40 and one layer of locking members 21 arranged on the horizontal base 11.

[0047] As Figure 2 and Figure 3As shown in the figure, in order to further prevent the outer container 60 from shifting and tilting and ensure the coaxiality between the housing 61 and the guiding shaft 31, as an implementation manner, the positioning assembly 20 further includes a support ring 22 disposed on the horizontal base 11 for positioning the first head 62 of the outer container 60. Along the radial direction of the guiding shaft 31, the support ring 22 is disposed inside the locking member 21, and the center of the support ring 22 is located on the axis of the guiding shaft 31.

[0048] As Figure 2 and Figure 3 shown, due to the use of vertical assembly, in some implementation manners, the first head 62 and the second head 63 can be respectively inserted and connected from the lower and upper sides of the housing 61, but this makes the assembly steps and the structure of the assembly tooling more complex. As a preferred embodiment, the first head 62 is also inserted onto the base frame 10 from above the horizontal base 11. Specifically, in some implementation manners, the first head 62 can be first stably disposed on the support ring 22. At this time, the axis of the central hole at the end of the first head 62 is substantially collinear with the guiding shaft 31. The coaxiality between the first head 62 and the guiding shaft 31 can be further ensured by fine adjustment or other means. Then, the housing 61 is placed on the horizontal base 11 and aligned with the end of the first head 62, and then the housing 61 is fixed by the locking member 21, and finally the first head 62 and the housing 61 are fixed by welding. In other implementation manners, the housing 61 of the outer container 60 and the first head 62 can also be pre-welded into one body in advance. The axial position of the housing 61 is ensured by abutting against the peripheral surface of the housing 61 through the positioning assembly 20, and the axial position of the first head 62 is ensured by stably contacting the first head 62 that constitutes the spherical bottom of the outer container 60 through the support ring 22. Thus, the axial position of the outer container 60 is ensured by the dual structures. In this embodiment, the housing 61 and the first head 62 are pre-welded into one body.

[0049] In order to better support and position the first head 62, as an implementation manner, a ring groove is provided on the horizontal base 11, and the support ring 22 is disposed in the ring groove and protrudes from the horizontal base 11. In other implementation manners, an annular boss can also be provided on the horizontal base 11, and a ring groove is provided on the top surface of the annular boss. The support ring 22 is disposed in the ring groove and protrudes from the top surface of the annular boss.

[0050] In this embodiment, the ring groove is provided on the horizontal base 11, and a sink 12 for accommodating a part of the first head 62 is further provided on the horizontal base 11. Along the radial direction of the guiding shaft 31, the sink 12 is located inside the ring groove, that is, inside the support ring 22 (as Figure 2 and Figure 3 shown). Under the action of the support ring 22, the first head 62 does not contact the bottom of the sink 12, so as to reserve the axial position adjustment space and connection space for the first support portion 70 at this end and the first head 62.

[0051] In this embodiment, the lifting mechanism 32 is not specifically limited. For example, in some embodiments, the lifting mechanism 32 may be a hoisting device provided at the top of the base frame 10. In some embodiments, a height adjustment device with functions of guiding, positioning, limiting, and jacking driven by machinery or hydraulics may also be provided at the bottom of the base frame 10. As an implementation manner, the lifting mechanism 32 is connected to the guiding shaft 31, and a limiting portion for axially supporting and limiting the inner container 50 is provided on the guiding shaft 31. Preferably, the lifting mechanism 32 adopts a structure provided at the bottom of the base frame 10.

[0052] The present invention provides an assembly tool for realizing the vertical assembly of a double-layer container for the assembly of the inner container 50 and the outer container 60 of a double-layer container with axial end support and fixation. After the housing 61 and the first head 62 of the outer container 60 are connected, the whole is vertically positioned on the horizontal base 11 through the locking member 21. Since the inner container 50 and the outer container 60 are respectively positioned by the positioning assembly 20 and the guiding shaft 31 with coincident centers, the coaxiality of the inner container 50 and the outer container 60 during the initial assembly is directly ensured. Then, the adjustment and fixation of the corresponding positions of the housing 61 and the second head 63 at the other end, and the first support portion 70 and the second support portion 80 on the inner container 50 with the first head 62 and the second head 63 can be carried out. Compared with the prior art of horizontally assembling a double-layer container and needing to open holes in the outer container 60 cylinder to clamp the inner container 50, while completing the assembly of the inner container 50 and the outer container 60 of the double-layer container with support structures at both axial ends, this application also does not need to set process support plates, reinforcement plates and other structures inside the outer container 60, that is, the process holes, process supports and reinforcement plates are cancelled, ensuring the integrity and consistency of the outer container 60. By using this assembly tool, the structural problem of difficult assembly of the two heads of the double-layer horizontal container is solved, and the vertical assembly method is simple and reliable. Compared with horizontal assembly, the production efficiency is greatly improved, which is beneficial to the mass production of the tank body.

[0053] Embodiment 2

[0054] Based on the same inventive concept, this embodiment provides an assembly method for a double-layer container implemented based on the assembly tool in Embodiment 1. The outer container 60 includes a housing 61 and a first head 62 and a second head 63 assembled at both ends of the housing 61; the assembly method includes the following steps:

[0055] Fix the housing 61 assembled with the first head 62 on the horizontal base 11 through the positioning assembly 20;

[0056] Place the inner container 50 into the housing 61, and sleeved and fitted the first support portion 70 connected to the first end of the inner container 50 coaxially with the guide shaft 31 of the height adjustment assembly 30. Since the positioning center line of the positioning assembly 20 is collinear with the axis of the guide shaft 31 and perpendicular to the horizontal base 11, the axial position of the inner container 50 is positioned, directly ensuring the coaxiality of the inner container 50 and the outer container 60;

[0057] Assemble the second head 63 to the housing 61;

[0058] Lift and lower the inner container 50 through the lifting mechanism 32 to adjust the position of the inner container 50 in the height direction relative to the second head 63, connect and fix the second head 63 and the second support portion 80 connected to the second end of the inner container 50, and connect and fix the first head 62 and the first support portion 70. The sleeving of the outer container 60 and the inner container 50 is completed, which can meet the assembly requirements of different sizes, and ensure the relative position dimension adjustment requirements during the sleeving process of the housing 61 of the inner container 50 and the outer container 60. It can adapt to the position offset during the assembly process and the clearance deviation caused by the deviation of its own size to a certain extent, ensuring that the size of the assembled finished product meets the requirements;

[0059] Seal the outer container 60 and the inner container 50 to obtain a double-layer container.

[0060] In this embodiment, the connection steps of the first head 62 and the housing 61 are not specifically limited. In some embodiments, when there is a support ring 22 for supporting and positioning the first head 62 on the horizontal base 11, the assembly can be carried out on the base frame 10. Specifically, the first head 62 can be stably placed on the support ring 22 first. At this time, the axis of the central hole at the end of the first head 62 is basically collinear with the guide shaft 31. The coaxiality of the first head 62 and the guide shaft 31 can be further ensured by fine adjustment or other means. Then, the housing 61 is placed on the horizontal base 11 and aligned with the end of the first head 62, and then the housing 61 is fixed by the locking member 21, and then the first head 62 and the housing 61 are fixed by welding.

[0061] To simplify the steps, as an embodiment, the outer container 60 is fixed to the horizontal base 11 through the positioning assembly 20. Specifically, the housing 61 and the first head 62 are welded together as a whole and placed on the horizontal base 11 as a whole. The housing 61 and the first head 62 are positioned by at least three locking members 21 arranged at intervals along the circumferential direction of the housing 61 of the positioning assembly 20. For example, the housing 61 and the first head 62 can be connected by a horizontal assembly method.

[0062] Since the first head 62 has been connected to the lower end of the housing 61 placed on the horizontal base 11, in this embodiment, placing the inner container 50 into the housing 61 specifically includes placing the inner container 50 into the housing 61 from top to bottom.

[0063] Different from the double-layer container in which the outer container 60 and the inner container 50 are connected in the radial direction through a support structure, the present application is directed to a double-layer container in which the outer container 60 and the inner container 50 are fixedly connected at the axial ends. In order to realize the adjustable positions at both ends of the inner container 50 and the outer container 60 and meet the assembly requirements, in this embodiment, the first support portion 70 includes an upper support block 71 and a lower support block 72 that are partially sleeved and movably matched. The upper support block 71 is connected to the inner container 50. After the double-layer container is assembled, the first support portion 70 fixedly connects the outer container 60 and the inner container 50. The upper support block 71 and the lower support block 72 are respectively connected to the inner container 50 and the outer container 60. In the horizontal state, since the lower support block 72 is fixed to the outer container 60, the lower support block 72 stably supports the upper support block 71. Compared with the double-layer container with a radially arranged support structure, the upper support block 71 and the lower support block 72 of the first support portion 70 with axial movable matching are respectively connected between the first head 62 and the end of the inner container 50. When the inner container 50 is filled with cryogenic liquid and shrinks sharply, or expands when the cryogenic liquid is discharged, the upper support block 71 and the lower support block 72 can move axially relative to each other, compensating for the dimensional changes of the inner container 50 due to thermal expansion and contraction, and avoiding damage to the inner container 50 and the housing 61 due to the acting force of thermal expansion and contraction.

[0064] Therefore, before the inner container 50 is placed, the lower support block 72 needs to be fixedly positioned with the guide shaft 31 first. In this embodiment, before the inner container 50 is placed in the housing 61, the assembly method further includes sleeving the lower support block 72 on the guide shaft 31 and axially positioning it;

[0065] The inner container 50 is placed in the housing 61, and the first support portion 70 connected to the first end of the inner container 50 is sleeved and fitted coaxially with the guide shaft 31 of the height adjustment assembly 30. Specifically, it includes placing the inner container 50 in the outer container 60 and making the central hole of the upper support block 71 cooperate with the guide shaft 31, that is, the upper support block 71 abuts against the lower support block 72 in the initial installation state without the action of the lifting mechanism 32, thereby realizing the limit of the inner container 50.

[0066] Lift the inner container 50 through the lifting mechanism 32 to adjust the position of the inner container 50 in the height direction relative to the second head 63, connect and fix the second head 63 and the second support portion 80 connected to the second end of the inner container 50, and connect and fix the first head 62 and the first support portion 70. Specifically, lift the inner container 50 through the lifting mechanism 32, adjust the relative position of the inner container 50 to the second support portion 80 and the second head 63 to be qualified, and connect and fix the second head 63 and the second support portion 80; at this time, the positions of the inner container 50, the first support portion 70, and the upper support block 71 are all fixed by the second head 63. At this time, adjust the relative position of the first support portion 70 and the first head 62 and connect and fix the first head 62 and the first support portion 70 so that the mating dimensions at both ends of the two shafts meet the requirements.

[0067] Taking the lifting mechanism 32 connected to the guide shaft 31 and directly driving the guide shaft 31 to lift as an example, the lower support block 72 is positioned through the limiting portion and moves up and down with the guide shaft 31. The upper support block 71 follows the movement and lifts under the abutting action of the lower support block 72. The positioning assembly 20, the guide shaft 31, and the driving mechanism are arranged at the lower part of the base frame 10. That is, when adjusting the position of the second support portion 80 and the second head 63, the lower support block 72 is positioned through the limiting portion and rises and falls accordingly. At this time, the second support portion 80, the inner container 50, the upper support block 71, and the lower support block 72 are lifted as a whole. After the first support portion 70 and the second head 63 are welded and fixed, the position of the inner container 50 is fixed. Subsequently, when the guide shaft 31 descends, only the lower support block 72 descends accordingly, thereby adjusting the gap between the upper support block 71 and the lower support block 72 and the gap between the lower support block 72 and the first head 62 to meet the dimensional requirements of the inner container 50 and the outer container 60 and the dimensional changes due to thermal expansion and contraction. Since the positioning center of the positioning assembly 20 coincides with the axis of the guide shaft 31, the coaxiality of the upper support block 71, the lower support block 72, and the outer container 60 is ensured during initial assembly. The assembly idea of the double-layer container is to position the lower support block 72 of the first support portion 70 at the sliding end → assemble and position the housing 61 of the outer container 60 and the first head 62 - place the inner container 50 → assemble the housing 61 of the outer container 60 and the second head 63 → lift the inner container 50 and adjust the relative position dimensions of the first support portion 70 at the fixed end and the second head 63, then weld and fix the first support portion 70 and the second head 63 → lower the lower support block 72 at the sliding end to adjust the axial gap between the upper support block 71 and the lower support block 72 at the sliding end and the distance between the lower support block 72 and the first head 62. After meeting the requirements, weld and fix to complete the container nesting → seal the central holes of the first support portion 70 and the second support portion 80.

[0068] The specific assembly steps are as follows:

[0069] 1. Set the lower support block 72 on the guide shaft 31 and position it;

[0070] 2. Pre-weld the shell 61 of the outer container 60 and the first head 62 into one body, and place the whole on the horizontal base 11, and position it through the locking member 21 and the support ring 22;

[0071] 3. Place the inner container 50 into the shell 61 from top to bottom, ensure that the guiding shaft 31 accurately penetrates into the shaft hole of the upper support block 71, and the upper support block 71 contacts the limiting portion on the guiding shaft 31;

[0072] 4. Install the second head 63 and spot-weld it to the shell 61 for positioning;

[0073] 5. Use the lifting mechanism 32 at the bottom to lift the inner container 50 upward. After adjusting the relative position dimension between the second support portion 80 and the second head 63, weld and fix the second support portion 80 and the second head 63.

[0074] 6. Loosen the lifting mechanism 32 at the bottom, lower it to adjust the gap between the upper support block 71 and the lower support block 72 and the distance between the lower support block 72 and the first head 62. After meeting the requirements, weld and fix the lower support block 72 and the first head 62 to complete the container set;

[0075] 7. Weld the spot-welded parts, and weld the sealing plate inside the first support portion 70 and the second support portion 80. Complete the sealing to obtain a double-layer container.

[0076] In summary, the present invention provides an assembly tooling and an assembly method for realizing the vertical assembly of a double-layer container for the assembly of an inner container and an outer container supported and fixed by shaft ends. After the shell of the outer container and the first head are connected, the whole is vertically positioned on the horizontal base through the locking member. Since the inner container and the outer container are respectively positioned by the positioning components and the guiding shaft with the same center, the coaxiality of the inner container and the outer container during the initial assembly is directly ensured. Then, the corresponding position adjustment and fixation of the shell and the second head at the other end, as well as the first support portion and the second support portion on the inner container and the first head and the second head, can be carried out. Compared with the prior art of horizontally assembling a double-layer container and requiring to open holes in the outer container cylinder to clamp the inner container, the present application can complete the assembly of the inner container and the outer container of a double-layer container with support structures at both axial ends without setting process support plates, reinforcing plates and other structures inside the outer container, that is, canceling the process holes, process supports and reinforcing plates, ensuring the integrity and consistency of the outer container. By using this assembly tooling, the structural problem of difficult assembly of the two heads of a double-layer horizontal container is solved, and the vertical assembly method is simple and reliable. Compared with horizontal assembly, the production efficiency is greatly improved, which is beneficial to the mass production of the tank body.

[0077] Although the preferred embodiments of the present application have been described, additional changes and modifications can be made to these embodiments by those of ordinary skill in the art once they learn the basic inventive concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications that fall within the scope of the present application.

[0078] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

1. An assembly tooling, characterized in that, For assembling a double-layer container, the double-layer container includes a nested inner container and outer container, and a first support portion and a second support portion respectively connected to both axial ends of the inner container and connecting the inner container and the outer container. The outer container includes a housing and a first head and a second head assembled to both ends of the housing. The first support portion includes an upper support block and a lower support block that are partially nested and movably fitted. The upper support block is connected to the first end of the inner container, and the lower support block is connected to the first head. The second support portion fixedly connects the second head and the second end of the inner container. The assembly tooling includes, A base frame provided with a horizontal base platform; A positioning assembly including at least three locking members spaced apart on the horizontal base platform for circumferentially and spacedly clamping and positioning the outer container along the circumference of the outer container; A height adjustment assembly including a guide shaft and a lifting mechanism both provided on the base frame and acting on the inner container. The guide shaft is used for coaxial nested fitting with the first support portion connected to the first axial end of the inner container; Wherein, the positioning center line of the positioning assembly is collinear with the axis of the guide shaft and perpendicular to the horizontal base platform.

2. The assembly tooling according to claim 1, characterized in that, The number of the locking members is 2n, n≥2, and every two of the locking members are oppositely arranged along a diameter of the guide shaft.

3. The assembly tooling according to claim 1, characterized in that, The number of the locking members is at least six, and the clamping action points of the at least six locking members are distributed in at least two layers along the axial direction of the guide shaft.

4. The assembly tooling according to claim 3, wherein The assembly tooling further includes mounting brackets spaced apart on the horizontal base platform, and the locking members are respectively provided on the horizontal base platform and the mounting brackets.

5. The assembly tooling according to any one of claims 1-4, characterized in that, The positioning assembly further includes a support ring provided on the horizontal base platform for positioning the first head of the outer container; Along the radial direction of the guide shaft, the support ring is provided inside the locking members, and the center of the support ring is located on the axis of the guide shaft.

6. The assembly tooling according to claim 5, wherein A ring groove is provided on the horizontal base platform, and the support ring is provided in the ring groove and protrudes from the horizontal base platform.

7. The assembly tooling according to claim 6, characterized in that, A sink for accommodating part of the head is further provided on the horizontal base platform. Along the radial direction of the guide shaft, the sink is located inside the ring groove.

8. The assembly tooling according to any one of claims 1-4, characterized in that, The lifting mechanism is connected to the guide shaft, and a limiting portion for axially supporting and limiting the inner container is provided on the guide shaft.

9. A method for assembling a double-layer container using the assembly tooling according to any one of claims 1-8, characterized in that, The assembly method includes the following steps: Fix the housing assembled with the first head to the horizontal base platform through the positioning assembly; Place the inner container into the housing, and make the first support portion connected to the first end of the inner container fit in coaxial nesting with the guide shaft of the height adjustment assembly; Assemble the second head to the housing; Lift and lower the inner container through the lifting mechanism, adjust the position of the inner container in the height direction relative to the second head, fixedly connect the second head and the second support portion connected to the second end of the inner container, and fixedly connect the first head and the first support portion to complete the nesting of the outer container and the inner container; Seal the outer container and the inner container to obtain the double-layer container.

10. The assembly method according to claim 9, wherein, Fixing the outer container to the horizontal base by the positioning assembly specifically includes welding the shell and the first head into one body and placing the whole on the horizontal base, and positioning the shell and the first head by at least three locking members arranged at intervals along the circumferential direction of the shell of the positioning assembly; Placing the inner container into the shell specifically includes placing the inner container into the shell from top to bottom.

11. The assembly method according to claim 10, characterized in that, Before placing the inner container into the shell, the assembling method further includes sleeving the lower support block on the guiding shaft and axially positioning it; Placing the inner container into the shell and sleeving and mating the first support portion connected to the first end of the inner container with the guiding shaft of the height adjustment assembly specifically includes placing the inner container into the outer container and mating the central hole of the upper support block with the guiding shaft; Lifting and lowering the inner container by the lifting mechanism, adjusting the position of the inner container in the height direction relative to the second head, connecting and fixing the second head and the second support portion connected to the second end of the inner container, and connecting and fixing the first head and the first support portion specifically includes lifting and lowering the inner container by the lifting mechanism, adjusting the inner container until the relative position between the second support portion and the second head is qualified, connecting and fixing the second head and the second support portion; and adjusting the relative position between the first support portion and the first head and connecting and fixing the first head and the first support portion.

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