Welding jig

Abstract

The utility model discloses a welding jig which solves the problems that a polar plate deviates from the thickness center position of a polar frame after being welded or the edge of the polar plate warps after being welded due to the consistency deviation of a concave-convex structure on the surface of an emulsion convex polar plate. The jig comprises a first positioning bearing area, a second positioning bearing area and a welding area located between the first positioning bearing area and the second positioning bearing area, and the welding area is a groove surrounding the outer edge of the second positioning bearing area. The first positioning bearing area is used for bearing and / or fixing a first welding piece; the second positioning bearing area is used for bearing and / or fixing a second welding piece, a supporting piece is arranged on the second positioning bearing area, and the top of the supporting piece can support the second welding piece. The supporting piece supports the second welding piece in the groove hole, the groove provides a welding space to complete welding of the two welding pieces, the assembling positions of the welding pieces do not need to be repeatedly positioned and adjusted, and the problem that the thickness center positions of the second welding piece and the first welding piece deviate or warp is solved.

Description

Technical Field

[0001] The utility model relates to the field of hydrogen production by electrolysis of alkaline water, and in particular to a welding jig. Background Art

[0002] Industrialized alkaline water electrolysis hydrogen production mostly uses bipolar filter press electrolyzers. For alkaline water electrolysis hydrogen production electrolyzers, self-supporting plates with convex plates are currently commonly used. Since this type of plate has spherical concave-convex structures on both sides of the main plate, the conventional boss-shaped welding tooling used for welding flat-plate main plates cannot be adapted for convex plate welding. In addition, for self-supporting plates, the surface flow field formed by the concave-convex structure on the surface needs to be adjusted according to the inlet and outlet of the alkali solution when welding the surface flow field to the pole frame, that is, positioning is required during welding.

[0003] Therefore, for self-supporting plates or plates with concave-convex structural features on the surface of the main plates, there is a lack of positioning of the concave-convex structure during combined welding. During welding, workers rely on rotating the main plates to adjust the concave-convex flow field and the angle of the alkali liquid inlet and outlet of the frame, resulting in poor position consistency of the concave-convex structure after welding. Utility Model Content

[0004] The purpose of the utility model is to provide a welding jig for reducing the influence of the processing deviation of the concave and convex features of the plate itself on the welding positioning accuracy.

[0005] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0006] In a first aspect, the utility model provides a welding jig, comprising: a first positioning and carrying area, a second positioning and carrying area, and a welding area located between the first positioning and carrying area and the second positioning and carrying area, wherein the welding area is a groove, and the groove surrounds the outer edge of the second positioning and carrying area;

[0007] The first positioning and carrying area is used to carry and / or fix the first welding part;

[0008] The second positioning and carrying area is used to carry and / or fix the second welding part, and a support member is provided on the second positioning and carrying area, and the top of the support member can support the second welding part.

[0009] When the above technical solution is used for welding operations, the second welding part is first installed on the first positioning support area through the support, and the first welding part is placed on the first positioning support area. At this time, the contact seam between the first welding part and the second welding part is correspondingly in the welding area, that is, a welding space is provided for the first welding part and the second welding part at the groove to collect the solid oxides generated by welding, and at the same time avoid direct contact between the weld and the jig during welding to cause thermal impact on the jig. The operator can complete the welding work of the first welding part and the second welding part directly in the welding area without frequently positioning and adjusting the assembly position of the first welding part and the second welding part, ensuring the positioning of the second welding part, so as to reduce the deviation or warping of the thickness center position of the second welding part and the first welding part during welding.

[0010] In some possible implementations, the width-to-depth ratio of the groove is greater than or equal to 1.5; such a configuration provides a welding space for the welding point between the first welding part and the second welding part, thereby improving welding efficiency.

[0011] And / or, the width c of the groove is greater than or equal to 10 mm; such a setting increases the welding point between the first welding part and the second welding part to provide welding space, so that impurities such as welding slag generated during welding can fall into the groove, which is convenient for collection and cleaning.

[0012] And / or, a slag cleaning port is provided on the side wall or bottom of the groove. In this way, the operator can directly clean the impurities dropped during the welding process through the slag cleaning port, which is convenient for operation.

[0013] In some possible implementations, at least two positioning members are provided in the first positioning and carrying area; the positioning members may be integrally formed on the welding jig, or positioning holes may be provided on the first positioning and carrying area, and the positioning members may be inserted into the positioning holes;

[0014] And / or, the second positioning and carrying area has at least two slots, and the support member is located in the slots; the support member can also be integrally formed in the second positioning and carrying area;

[0015] Alternatively, the first positioning and supporting area may have a first boss on one side near the welding area, and the second positioning and supporting area may have a second boss on one side near the welding area, with the first boss being used to contact and support the first welded component, and the second boss being used to contact and support the second welded component. This arrangement facilitates the placement and installation of the first and second welded components.

[0016] In some possible implementations, an elastic member is further included, the elastic member is located in the second positioning bearing area, and the elastic member can adjust the axial lifting and lowering of the support member along the slot. The elastic member can be sleeved inside the support member (such as Figure 2As shown); the elastic member can also be sleeved on the outer periphery of the support member, and a clamping platform is provided at a position of the support member close to the elastic member so that the support member and the elastic member are fixedly connected. With this arrangement, a movable connection is formed between the support member and the bottom of the slot, so that the support member can be raised and lowered in the slot. When the nipple structure on the second welding member overlaps the top of the support member, the support member is pressed downward by pressure to squeeze the elastic member, and the support member slowly descends a certain distance along the axial direction of the slot to complete the support of the second welding member. Due to the buffering effect of the elastic member, there is a buffering adjustment space between the second welding member and the support member during welding, which avoids hard contact between the second welding member and the second positioning bearing area, reduces the wear of the support member on the surface structure of the second welding member, and improves the flexibility and compatibility of the welding jig.

[0017] And / or, the elastic member includes a spring, rubber and / or sponge. In this arrangement, the elastic member provides a buffering effect, so that the support member and the bottom of the slot are flexibly connected, reducing the wear of the support member on the surface structure of the second welding member.

[0018] In some possible implementations, the second positioning and supporting area is provided with multiple slots / support members spaced apart. This arrangement provides multiple support points for the second weldment on the second positioning and supporting area. The multiple support members can be spaced apart in any manner, ensuring that the second weldment is evenly stressed after being placed in the second positioning and supporting area, ensuring stable support and fixation of the second weldment, and avoiding human assembly errors.

[0019] In some possible implementations, multiple slots / support members are concentrically distributed in multiple circles on the second positioning and supporting area. These multiple circles of concentrically distributed slots / support members are spaced radially apart, with each circle including multiple spaced slots / support members. This arrangement results in a more even distribution of support points for the second weldment within the second positioning and supporting area, enabling accurate positioning of the second weldment and avoiding human assembly errors.

[0020] In some possible implementations, the diameter of the second positioning and supporting area or the plate is D, the number of circles of the slots / support members is m, and the following conditions are met:

[0021] The number of circles of slots / supports is m = D / d1, where d1 is 200mm to 600mm. In addition, the angle between the centers of two adjacent slots / supports and the distribution center O1 of the slots / supports is θ, the vertical distance between the centers of the first circle of slots / supports close to the distribution center O1 and the distribution center O1 is L1, and the vertical distance between the centers of the mth circle of slots / supports close to the distribution center O1 and the distribution center O1 is L m , the number of slots / supports in the mth circle is greater than or equal to n mThe following conditions must also be met: and / or the number of slots / supports in the mth circle is at least n m =d2*m, where d2 ranges from 2 to 8;

[0022] and / or, angle θ = 360° / N;

[0023] And / or, the vertical distance between the center of the slot / support of the mth circle and the distribution center O1 is L m =L1*m, where L1 is 200mm to 400mm. This arrangement ensures high-precision positioning of the electrode plates and avoids human assembly errors.

[0024] In some possible implementations, the slots / support members are arranged in a 'Piece', square, or V-shape on the surface of the second positioning and supporting area. With this arrangement, the support members, regardless of their distribution pattern, can all provide support and positioning for the second weldment, enabling accurate positioning and joining of the first and second weldments, avoiding human assembly deviations. This further improves the uniformity of the flow field and the alkali solution inlet and outlet angles of the convex second weldment after welding, reducing the risk of positional shifting.

[0025] And / or, the ratio of the slot depth to the slot diameter is 0.8 to 2.5. This arrangement ensures that the support member placed in the slot can provide sufficient support force for the second welding member, improves positioning accuracy, and reduces the risk of the second welding member shifting.

[0026] In some possible implementations, the slots / support members are arranged in a V-shape with at least two openings facing opposite directions and spaced apart, a V-shape with at least two openings facing opposite directions and spaced apart, or a V-shape with at least two openings facing the same direction and spaced apart. This arrangement ensures support and positioning for the second weldment, allowing for accurate positioning and splicing of the first and second weldments, avoiding human assembly deviations. This further improves the uniformity of the flow field and the alkali solution inlet and outlet angles of the nipple-shaped second weldment after welding, reducing the risk of positional shifting.

[0027] In some possible implementations, the top of the support member is a flat surface or a curved surface; such a configuration further improves the support stability of the support member.

[0028] On the second aspect, when the welding jig of the present application is used to weld the pole frame in the field of hydrogen production by electrolysis of water, the first welding part is the pole frame, the second welding part is the pole plate, the positioning part is inserted into the channel of the pole frame, the pole frame is placed on the first boss and is circumferentially fixed to the first positioning bearing area by the positioning part, the pole plate has a nipple structure, the pole plate is placed on the second boss and is supported by contact with the top of the support member through the nipple structure. In this way, the pole frame is the first welding part, and the pole plate is the second welding part. After the welding jig fixes the pole plate with the nipple structure and the pole frame, it completes the welding of the pole plate and the pole frame in the welding area of the welding jig. There is no need to frequently position and adjust the assembly position of the pole plate and the pole frame. The positioning of the pole plate is ensured by the cooperative contact between the support member and the nipple structure, so that the deviation or warping of the thickness center position of the pole plate and the pole frame is reduced during welding. Of course, the welding jig of the present application is not limited to welding plates with nipple structures, but can also weld flat plates, plates with mesh structures and plates with other structures. The support members on the second positioning bearing area can all play a supporting role to achieve the aforementioned technical effect of preventing deviation or warping.

[0029] In some possible implementations, the first positioning and supporting area has a first boss on one side near the welding area, and the second positioning and supporting area has a second boss on one side near the welding area, wherein the height h1 of the first boss is less than or equal to the height h2 of the second boss. With this arrangement, when the thickness h3 of the pole frame weld is greater than the thickness h4 of the pole plate weld, since the height h1 of the first boss is less than or equal to the height h2 of the second boss, the centerlines of the pole plate and pole frame at the weld are aligned, reducing welding errors and further improving the positional consistency of the mastoid structure on the pole plate after welding.

[0030] And / or, the height h2 of the second boss is greater than or equal to the height h5 of the mastoid structure on the electrode plate protruding from the electrode plate surface. This arrangement ensures that when the electrode plate is placed on the second boss, no gap exists between the mastoid structure on the electrode plate and the surface of the second positioning and supporting area. This prevents the mastoid structure on the electrode plate from contacting the surface of the second positioning and supporting area, which would cause wear on the surface of the mastoid structure, thereby ensuring support and positioning of the electrode plate structure.

[0031] And / or, the height h1 of the first boss is greater than 1 / 2 of the thickness h3 of the pole frame; such an arrangement enables a mounting gap b to exist between the lower surface of the pole frame and the upper surface of the first positioning bearing area when the positioning member positions the pole frame on the first positioning bearing area.

[0032] And / or, the gap b between the lower surface of the pole frame and the upper surface of the first positioning bearing area is greater than or equal to 0.5 mm; such an arrangement ensures that the pole frame has an assembly error when installed on the welding jig, avoiding pressure loss on the surface structure of the pole frame during welding.

[0033] And / or, the height difference between the first boss and the second boss is 1 / 2 of the difference between the thickness h3 of the pole frame at the welding point and the thickness h4 of the pole plate. This arrangement aligns the center line of the pole frame and the center line of the pole plate at the welding point, ensuring the accuracy of the welding position. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0035] Figure 1 This is a schematic diagram of the overall structure of a welding jig provided in an embodiment of the present utility model;

[0036] Figure 2 for Figure 1 Cross-sectional view at AA in the middle;

[0037] Figure 3 for Figure 2 Schematic diagram of the local structure during welding work;

[0038] Figure 4 A first V-shaped arrangement shape of the upper support member of a welding jig provided in an embodiment of the present utility model;

[0039] Figure 5 This is a second V-shaped arrangement shape of the upper support member of a welding jig provided in an embodiment of the present utility model;

[0040] Figure 6 This is a third V-shaped arrangement shape of the upper support member of a welding jig provided in an embodiment of the present utility model;

[0041] Figure 7 The upper support members of a welding jig provided in an embodiment of the present utility model are arranged in a cross-shaped shape;

[0042] Figure 8 The upper support members of a welding jig provided in an embodiment of the present invention are arranged in a square shape.

[0043] Reference numerals:

[0044] 1-first positioning bearing area; 11-positioning hole; 12-positioning member; 13-first boss; 2-second positioning bearing area; 21-slot hole; 22-support member; 23-elastic member; 24-second boss; 25-fixing bolt hole; 3-welding area; 4-pole frame; 5-pole plate; 51-mast structure; 6-alkaline solution channel. DETAILED DESCRIPTION

[0045] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0046] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined. "Several" means one or more, unless otherwise specifically defined.

[0048] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0049] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0050] like Figures 1-8 As shown, a welding jig provided by an embodiment of the present invention includes: a first positioning and carrying area 1, a second positioning and carrying area 2 and a welding area 3.

[0051] Among them, the welding area 3 is located between the first positioning bearing area 1 and the second positioning bearing area 2, the welding area 3 is a groove, and the groove surrounds the outer edge of the second positioning bearing area 2; the first positioning bearing area 1 is used to support and / or fix the first welding part; the second positioning bearing area 2 is used to support and / or fix the second welding part, and a support member 22 is provided on the second positioning bearing area 2, and the top of the support member 22 can support the second welding part.

[0052] When carrying out welding operations, Figure 1 As shown, first, the first weld part is fixed on the first positioning bearing area 1, and the second weld part is placed on the support part 22. At this time, the contact seam between the first weld part and the second weld part is correspondingly in the welding area 3, that is, a welding space is provided for the first weld part and the second weld part at the groove to collect the solid oxides generated by welding, and at the same time, the direct contact between the weld and the jig during welding is avoided to cause thermal impact on the jig. The operator can complete the welding work of the first weld part and the second weld part directly in the welding area 3, without the need to frequently repeatedly position and adjust the assembly position of the first weld part and the second weld part, to ensure the positioning of the second weld part, so as to reduce the deviation or warping of the thickness center position of the second weld part and the first weld part during welding.

[0053] like Figure 2 As shown, specifically, in this embodiment, the aspect ratio of the groove is greater than or equal to 1.5. The aspect ratio M of the groove is equal to d / c, and the aspect ratio M of the groove can be 1.5, 1.65, 1.7, 1.8, 2.0, etc. There is no specific limitation on the aspect ratio M of the groove. The groove provides a welding space for the welding point of the first welding part and the second welding part, thereby improving welding efficiency.

[0054] like Figure 2 As shown, specifically, in this embodiment, the width of the groove is greater than or equal to 10 mm. That is, the width c of the groove can be 10 mm, 13.5 mm, 15 mm, 18 mm, 20 mm, etc. There is no specific limitation on the width c of the groove, as long as the width c of the groove can provide a welding space for the welding point of the first welded part and the second welded part, so that impurities such as welding slag generated during welding can fall into the groove, which is convenient for collection and cleaning.

[0055] Specifically, in this embodiment, a slag cleaning port is provided on the sidewall or bottom of the groove. That is, the slag cleaning port can be provided only on the sidewall or bottom of the groove, or on both the sidewall and bottom of the groove. The operator can directly clean impurities dropped during welding through the slag cleaning port, facilitating operation.

[0056] Specifically, in this embodiment, at least two positioning members 12 are provided in the first positioning and supporting area 1; the positioning member 12 can be integrally formed on the welding jig, or a positioning hole 11 can be provided on the first positioning and supporting area 1, and the positioning member 12 is inserted into the positioning hole 11; wherein, at least two positioning holes 11 are provided on the first positioning and supporting area 1, and the positioning member 12 can be inserted into the positioning hole and the channel of the first welding member. No specific limitation is made to the positioning hole 11, as long as the positioning hole 11 satisfies the requirements of the connection with the positioning member 12.

[0057] And / or, the second positioning and carrying area 2 has at least two slots 21, and the support member 22 is located in the slots 21; the support member 22 can also be integrally formed in the second positioning and carrying area;

[0058] Alternatively, the first positioning and supporting area 1 has a first boss 13 on its side near the welding area 3, and the second positioning and supporting area 2 has a second boss 24 on its side near the welding area 3. The first boss 13 is used to contact and support the first weldment, and the second boss 24 is used to contact and support the second weldment. This arrangement facilitates the placement and installation of the first and second weldments.

[0059] Specifically, in this embodiment, the welding jig further includes an elastic member 23, which is located in the second positioning and bearing area 2, and the elastic member 23 can adjust the axial lifting and lowering of the support member 22 along the slot 21. A movable connection is formed between the support member 22 and the bottom of the slot 21, so that the support member 22 can be lifted and lowered in the slot 21. When the second welding member is overlapped on the top of the support member 22, the support member 22 is pressed downward by the pressure to squeeze the elastic member 23, and the support member 22 slowly descends a certain distance along the axial direction of the slot 21 to complete the support of the second welding member. Due to the buffering effect of the elastic member 23, there is a buffering adjustment space between the second welding member and the support member 22 during welding, wherein the elastic member 23 can be sleeved inside the support member 22 (such as Figure 2 As shown); the elastic member 23 can also be sleeved on the outer periphery of the support member 22, and a clamping platform is provided at a position of the support member 22 near the elastic member 23 so that the support member 22 and the elastic member 23 are fixedly connected, thereby avoiding hard contact between the second welding member and the second positioning bearing area 2, reducing the wear of the support member 22 on the surface structure of the second welding member, and improving the flexibility and compatibility of the welding jig.

[0060] Specifically, in this embodiment, the elastic member 23 includes a spring, rubber, and / or sponge. The spring, rubber, and sponge are all elastic and can provide a cushioning effect for the support member 22. The elastic member 23 is not specifically limited herein. When the support member 22 is pressed downward by the weight of the second weldment, the elastic member 23 contracts under the pressure, causing the second weldment to fall back with the support member 22, and the area of its edge to be welded overlaps the second boss 24 before welding. When welding is completed and the second weldment is removed, the elastic member 23 returns to its original position, lifting the support member 22, thereby achieving a flexible connection between the support member 22 and the bottom of the slot 21, thereby reducing wear of the support member 22 on the surface structure of the second weldment.

[0061] In some embodiments, the second positioning and supporting area 2 is provided with a plurality of spaced slots 21 / support members 22. The plurality of spaced slots 21 / support members 22 on the second positioning and supporting area 2 can provide multiple support points for the second weldment. The plurality of support members 22 can be spaced in any manner, so that the second weldment is evenly stressed after being placed on the second positioning and supporting area 2, ensuring stable support and fixation of the second weldment and avoiding human assembly errors.

[0062] like Figure 1 As shown, specifically, in this embodiment, multiple slots 21 / support members 22 are concentrically distributed in multiple circles on the second positioning and bearing area 2. It should be noted that, depending on the actual support situation, the slot 21 may or may not be provided at the distribution center point. Multiple circles of concentrically distributed slots 21 / support members 22 are arranged at intervals along the radial direction, and each circle includes multiple spaced slots 21 / support members 22. Among them, the slots 21 / support members 22 can be provided with 1 circle, 2 circles, 5 circles, 8 circles, 15 circles, etc., and the number of circles of slots 21 / support members 22 is not specifically limited. As long as the arrangement of the slots 21 / support members 22 satisfies the uniform distribution of the support members 22 on the second welded part in the second positioning and bearing area 2, the second welded part can be accurately positioned, avoiding human assembly errors.

[0063] like Figure 4-Figure 7 As shown, specifically, in this embodiment, the arrangement shape of the slots 21 / support members 22 on the surface of the second positioning bearing area includes a cross shape or a V shape with the opening direction radially parallel to the distribution center O1. The solid lines in the figure are to illustrate the arrangement shape of the support members 22. The direction of the axis of symmetry of the V-shaped arrangement is collinear with the direction of the radial extension line of the distribution center O1. At the same time, the direction of the axis of symmetry of the V-shaped arrangement needs to be consistent with the flow field direction of the inlet and outlet on the second weldment. Through the slots 21 / support members 22 with different distribution patterns, it is possible to ensure support and positioning of the second weldment, so that the first weldment and the second weldment can be accurately positioned and spliced, avoiding human assembly deviations and reducing the risk of position offset.

[0064] like Figure 2 and Figure 3 As shown, specifically, in this embodiment, the ratio of the depth of the slot hole 21 to the aperture of the slot hole 21 is 0.8 to 2.5. For example, the ratio of the depth of the slot hole 21 to the aperture can be 0.8, 1.5, 2.1, 2.5, etc. There is no specific limitation on the ratio of the depth of the slot hole 21 to the aperture of the slot hole 21. It is sufficient as long as the support member 22 placed in the slot hole 21 can provide sufficient support force for the second welding member, improve the positioning accuracy, and reduce the risk of the second welding member shifting.

[0065] Specifically, in this embodiment, the arrangement shape of the support members 22 on the surface of the second positioning and carrying area 2 includes a rice shape, a square shape or a V shape. Figure 7 The M-shaped structure shown in FIG. Figure 8 The square structure distribution shown can provide support points for the second weldment in different directions and is evenly distributed on the second positioning bearing area 2 to ensure stable support for the second weldment; wherein, the V-shape includes at least two V-shapes with openings facing in opposite directions and arranged at intervals, or at least two V-shapes with openings facing in opposite directions and arranged at intervals, or at least two V-shapes with openings facing in the same direction and arranged at intervals. Figure 4 As shown, in some embodiments, at least two openings are oriented in the same direction and are arranged in a V-shape at intervals, and multiple V-shaped structures are oriented in the same direction and are arranged in sequence at intervals; Figure 5 As shown, in other embodiments, at least two openings are arranged in a V-shape facing oppositely and at intervals, that is, the two openings are arranged in a V-shape facing oppositely to each other to form a closed quadrilateral structure, and multiple circles of slots 21 are sequentially spaced from the center of the circle outward along the radial direction of the second weldment; Figure 6 As shown, in other embodiments, at least two openings are arranged in a V-shape in opposite directions and at intervals, that is, a part of the V-shaped openings are oriented away from the distribution center O1, and another part of the V-shaped openings are oriented also away from the distribution center O1, and the symmetry axis of the two parts of the V-shaped structure is collinear with the away direction. Of course, the arrangement shape of the slots 21 / support members 22 can also be other shapes that can ensure support and positioning for the second welding part. No specific limitation is made here. As long as the distribution center O1 is located in the axial direction of the V-shaped distribution axis of symmetry, and the flow field formed on the surface of the nipple structure 51 is at the optimal angle to the inlet and outlet directions of the alkali solution channel 6 on the first welding part (i.e., the alkali solution flow direction), the slots 21 / support members 22 with multiple circles of spaced distribution provide multiple support positions for supporting the second welding part, so that the first welding part and the second welding part can be accurately positioned and spliced, avoiding human assembly deviations, and reducing the poor welding position consistency caused by problems such as thermal deformation or high-temperature oxidation of the welding fixture body structure due to the influence of welding heat during welding. At the same time, the uniformity of the flow field and the alkali solution inlet and outlet angles of the nipple-type second welding part after welding is further improved, reducing the risk of position offset.

[0066] Specifically, in this embodiment, the ratio of the depth of the slot 21 to the aperture of the slot 21 is 0.8 to 2.5. For example, the ratio of the depth of the slot 21 to the aperture of the slot 21 can be 0.8, 1.0, 1.5, 1.7, 2.5, etc., which is not specifically limited here. This ensures that the support member 22 placed in the slot 21 can provide sufficient support force for the second weldment, improves positioning accuracy, and reduces the risk of the second weldment shifting.

[0067] Specifically, in this embodiment, the top of the support member 22 is a flat surface or a curved surface. Exemplarily, the top of the support member 22 can be a flat surface, a curved surface, or other shapes, which are not specifically limited herein. When the second weldment is a flat plate, the flat surface of the top of the support member 22 can increase the contact area between the top of the support member 22 and the surface of the second weldment, ensuring the stability of the second weldment. When the second weldment has a mastoid structure 51, the curved surface is a curved surface structure, which increases the contact area between the hemispherical surface and the surface of the mastoid structure 51, further improving the support stability of the support member 22 on the second weldment.

[0068] like Figure 1 and Figure 3As shown, at the same time, the present application also provides an application of the above-mentioned welding jig in hydrogen production by electrolysis of water, the first welding part is the pole frame 4, the second welding part is the pole plate 5, the positioning part 12 is inserted into the channel of the pole frame 4, the pole frame 4 is placed on the first boss 13 and is circumferentially fixed to the first positioning bearing area 1 through the positioning part 12, the pole plate 5 has a nipple structure, the pole plate 5 is placed on the second boss 24 and is supported by contact with the top of the support member 22 through the nipple structure 51. The pole frame 4 is the first welding part, and the pole plate 5 is the second welding part. The welding jig fixes the pole plate 5 with the nipple structure 51 and the pole frame 4, and then completes the welding of the pole plate 5 and the pole frame 4 in the welding area 3 of the welding jig, that is, there is no need to frequently repeatedly position and adjust the assembly position of the pole plate 5 and the pole frame 4, so that when the pole plate 5 is placed in the second positioning bearing area 2, it can be supported and circumferentially fixed by the contact between the inner wall of the nipple structure 51 and the support member 22, thereby solving the problems of poor positioning accuracy of the welding tooling of the nipple-type self-supporting pole plate, difficulty in ensuring the consistency of the surface flow field of the pole plate 5 and the alkali solution / gas alkali channel angle of the pole frame 4, and consistency of the nipple structure 51 on the surface of the nipple-type pole plate. The problem of deviation in the welding of the electrode plate 5 causing the electrode frame 4 to deviate from the thickness center position is solved by providing adaptable high-precision welding positioning tooling for the electrode plate 5 that is self-supporting or has concave-convex features on the surface, ensuring that the electrode plate 5 with supporting features on the surface (i.e., the arrangement of the support members 22) and forming a special flow field structure forms a fixed angle consistency with the alkali liquid / gas alkali outlet of the electrode frame 4 during welding, so as to give full play to the uniform diffusion effect of the flow field of the electrode plate 5 during the operation of the electrolytic cell, and at the same time avoid the influence of the processing deviation of the nipple structure 51 on the electrode plate 5 on the welding positioning accuracy, so as to reduce the deviation or warping of the thickness center position of the electrode plate 5 and the electrode frame 4 during welding, and ensure the support and positioning of the electrode plate 5 structure.

[0069] like Figure 1 As shown, specifically, in this embodiment, the welding area 3 is an annular welding area surrounding the outer edge of the second positioning and supporting area 2. Of course, the welding area 3 can also be a square welding area 3 or other shapes, and the shape of the welding area 3 is not specifically limited here.

[0070] like Figure 3As shown, specifically, in this embodiment, the first positioning and supporting area 1 has a first boss 13 on one side close to the welding area 3, and the second positioning and supporting area 2 has a second boss 24 on one side close to the welding area 3. The height of the first boss 13 is less than or equal to the height of the second boss 24. The height of the first boss 13 is h1, the height of the second boss 24 is h2, the thickness of the pole frame 4 at the welding point is h3, and the thickness of the pole plate 5 at the welding point is h4. When the thickness h3 of the pole frame 4 at the welding point is greater than the thickness h4 of the pole plate 5 at the welding point, since the height h1 of the first boss 13 is less than or equal to the height h2 of the second boss 24, preferably, the height difference between the first boss 13 and the second boss 24 is 1 / 2 of the difference between the thickness of the pole frame 4 at the welding point and the thickness of the pole plate 5, thereby ensuring that the center lines of the pole plate 5 and the pole frame 4 at the welding point are aligned, ensuring the accuracy of the welding position, reducing the welding error, and further improving the position consistency of the mastoid structure 51 on the pole plate 5 after welding.

[0071] like Figure 3 As shown, specifically, in this embodiment, the height of the second boss 24 is greater than or equal to the protruding height of the mastoid structure 51 on the electrode plate 5. The protruding height of the mastoid structure 51 on the electrode plate 5 is h5, so that when the electrode plate 5 is placed on the second boss 24, there is a gap a between the mastoid structure 51 on the electrode plate 5 and the surface of the second positioning and supporting area 2, thereby avoiding contact between the mastoid structure 51 on the electrode plate 5 and the surface of the second positioning and supporting area 2, which would cause wear on the surface of the mastoid structure 51, thereby ensuring support and positioning of the electrode plate 5 structure.

[0072] like Figure 3 As shown, specifically, in this embodiment, the height of the first boss 13 is greater than 1 / 2 of the thickness of the pole frame 4. The height h1 of the first boss 13 is greater than 1 / 2 of the thickness h3 of the pole frame 4, that is, When the positioning member 12 positions the pole frame 4 on the first positioning and carrying area 1 , an assembly gap b exists between the lower surface of the pole frame 4 and the upper surface of the first positioning and carrying area 1 .

[0073] like Figure 3 As shown, specifically, in this embodiment, the gap between the lower surface of the pole frame 4 and the upper surface of the first positioning and carrying area 1 is greater than or equal to 0.5 mm. That is, the gap b between the lower surface of the pole frame 4 and the upper surface of the first positioning and carrying area 1 is ≥ 0.5 mm, wherein the gap b between the lower surface of the pole frame 4 and the upper surface of the first positioning and carrying area 1 can be 0.5 mm, 0.56 mm, 0.65 mm, 0.85 mm, 0.9 mm, etc., and the gap b between the lower surface of the pole frame 4 and the upper surface of the first positioning and carrying area 1 is not specifically limited. It is sufficient to ensure that the pole frame 4 has an assembly gap when installed on the welding jig to avoid pressure loss on the surface structure of the pole frame 4 during welding.

[0074] Figure 4-Figure 8 Specifically shown is that the electrode frame 4 and the electrode plate 5 are already carried on the welding jig. In order to better match and support the different nipple arrangement structures on the electrode plate 5, support members 22 / slots 21 with different arrangement shapes are provided.

[0075] Specifically, in this embodiment, the specific parameters of the slot 21 / support member 22 on the second positioning and carrying area 2 are set according to the actual size of the electrode plate 5 or the second positioning and carrying area 2. The diameter of the electrode plate 5 or the second positioning and carrying area 2 is D, and the number of circles of the slot 21 / support member 22 is m, which satisfies the following conditions:

[0076] The number of circles of the slot holes 21 / support members 22 is m=D / d1, wherein d1 is 200 mm to 600 mm; that is, the interval between two adjacent circles of slot holes 21 / support members 22 can be 200 mm to 600 mm.

[0077] Number of slots 21 / supports 22 The value of d2 is 2 to 8; that is, 2 to 8 slots 21 / support members 22 can be set in each circle, and then the number of slots 21 / support members 22 set in each circle is superimposed on each other to obtain the total number N of slots 21 / support members 22 set.

[0078] In addition, the angle formed between the centers of the two adjacent slots 21 / supports 22 and the distribution center O1 is θ, the vertical distance between the centers of the slots 21 / supports 22 on the first circle close to the distribution center O1 and the distribution center O1 is L1, and the vertical distance between the centers of the slots 21 / supports 22 on the mth circle close to the distribution center O1 and the distribution center O1 is L m The number of the mth circle of slots 21 / supports 22 is greater than or equal to n m The following conditions must also be met:

[0079] The number of the mth circle of slots 21 / support members 22 is at least n m =d2*m; that is, the number of the mth circle of slots 21 / support members 22 should be at least greater than m.

[0080] and / or, angle θ = 360° / n m That is, the slots 21 / support members 22 provided on each circle are evenly arranged along the circumferential direction, and the spacing between two adjacent slots 21 / support members 22 is equal.

[0081] And / or, the vertical distance between the center of the slot 21 / support member 22 of the mth circle and the distribution center O1 is L m=L1*m, where L1 is 200mm~400mm; that is, the distance between the center of the mth circle of slots 21 / support members 22 and the distribution center O1 is L1*m, that is, a circle of slots 21 / support members 22 needs to be set for every interval L1 from the distribution center O1.

[0082] Among them, d1 and d2 are coefficients, as long as d1 and d2 meet the value range requirements; the number of circles m set by the slot hole 21 / support member 22 needs to be the integer part of the quotient value. When the quotient value of D / d1 is less than 1, m is 1; the vertical distance between the center of the mth circle of slot holes 21 / support member 22 close to the distribution center O1 and the distribution center O1 is L m , that is, the distance between the outermost slot 21 / support 22 and the distribution center O1 is L m When the distribution and number of the slots 21 / support members 22 meet the above conditions, a relatively stable supporting force can be provided to the electrode 5, thereby preventing the welding edge from warping due to the center area of the electrode 5 falling and affecting the splicing of the welding gap between the electrode 5 and the electrode frame 4, ensuring high-precision positioning of the electrode 5 and avoiding human assembly errors.

[0083] like Figure 4 、 Figure 6 and Figure 7 As shown, it should be noted that the number of the mth circle of slots 21 / support members 22 can be equal to n m The number of slots 21 / support members 22 in the mth circle may be greater than n. m There is no specific limitation here, as long as the above conditions are met.

[0084] like Figure 1 As shown, specifically, in this embodiment, the welding jig further includes a fixing bolt hole 25, which is located in the center area of the second positioning and bearing area 2. The fixing bolt hole 25 is used to install a fastener. When the diameter D of the electrode plate 5 is greater than 600 mm, the support member 22 and the fastener simultaneously provide support for the electrode plate 5. The fastener is installed on the rotating table through the fixing bolt hole 25 to perform automated production welding, thereby improving the welding efficiency of the welding jig. The number and arrangement of the fixing bolt holes 25 are not specifically limited here, as long as the fixing bolt holes 25 are sufficient to fix the welding jig.

[0085] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0086] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A welding jig, characterized in that: It includes a first positioning and carrying area, a second positioning and carrying area, and a welding area between the first positioning and carrying area and the second positioning and carrying area, wherein the welding area is a groove, and the groove surrounds the outer edge of the second positioning and carrying area; The first positioning and carrying area is used to carry and / or fix the first welding part; The second positioning and carrying area is used to carry and / or fix the second welding part, and a support member is provided on the second positioning and carrying area, and the top of the support member can support the second welding part.

2. The welding jig according to claim 1, characterized in that: The width-to-depth ratio of the groove is greater than or equal to 1.5; and / or, the width c of the groove is greater than or equal to 10 mm; And / or, a slag cleaning port is provided on the side wall or bottom of the groove.

3. The welding jig according to claim 1, characterized in that: The first positioning and carrying area is provided with at least two positioning members; And / or, the second positioning and carrying area has at least two slots, and the support member is located in the slots; And / or, the first positioning and carrying area has a first boss on a side close to the welding area, and the second positioning and carrying area has a second boss on a side close to the welding area.

4. The welding jig according to claim 3, characterized in that: The plurality of slots / support members are concentrically distributed in multiple circles on the second positioning bearing area. The plurality of concentrically distributed slots / support members are spaced apart in the radial direction, and each circle includes a plurality of spaced apart slots / support members.

5. The welding jig according to claim 3 or 4, characterized in that: The diameter of the second positioning bearing area is D, the number of circles of the slots / support members is m, and the following conditions are met: The number of circles of the slots / support members is m=D / d1, wherein d1 is 200 mm to 600 mm.

6. The welding jig according to claim 5, characterized in that: The angle formed between the centers of two adjacent slots / supports and the distribution center O1 of the slots / supports is θ, the vertical distance between the centers of the slots / supports on the first circle close to the distribution center O1 and the distribution center O1 is L1, and the vertical distance between the centers of the slots / supports on the mth circle close to the distribution center O1 and the distribution center O1 is L m , the number of slots / supports in the mth circle is greater than or equal to n m The following conditions must also be met: the number of slots / supports in the mth circle is at least n m =d2*m; And / or, the angle θ=360° / n m ; And / or, the vertical distance between the center of the slot / support member of the mth circle and the distribution center O1 is L m =L1*m, where L1 is between 200mm and 400mm.

7. The welding jig according to claim 3, characterized in that: It also includes an elastic member, which is located in the second positioning and bearing area, and the elastic member can adjust the axial lifting and lowering of the support member along the slot.

8. The welding jig according to claim 3, characterized in that: The arrangement shape of the slots / support members on the surface of the second positioning and carrying area includes a pound shape, a square shape or a V shape; And / or, the ratio of the depth of the slot to the aperture of the slot is 0.8 to 2.

5.

9. The welding jig according to claim 8, characterized in that: The arrangement shape of the slots / support members includes the V-shape with at least two openings facing oppositely and arranged at intervals, the V-shape with at least two openings facing oppositely and arranged at intervals, or the V-shape with at least two openings facing the same direction and arranged at intervals.

10. The welding jig according to claim 3, characterized in that: The first welding part is a pole frame, the second welding part is a pole plate with a mastoid structure, the positioning part is inserted into the channel of the pole frame, the pole frame is placed on the first boss and is circumferentially fixed to the first positioning bearing area through the positioning part, and the pole plate is placed on the second boss and is supported by contact with the top of the support member through the mastoid structure.

11. The welding jig according to claim 10, characterized in that: The height h1 of the first boss is less than or equal to the height h2 of the second boss; and / or, a height h2 of the second boss is greater than or equal to a protruding height h5 of the mastoid structure on the electrode plate relative to the plate surface of the electrode plate; and / or, the height h1 of the first boss is greater than 1 / 2 of the thickness h3 of the pole frame; and / or, a gap b between the lower surface of the pole frame and the upper surface of the first positioning and bearing area is greater than or equal to 0.5 mm; And / or, the height difference between the first boss and the second boss is 1 / 2 of the difference between the thickness h3 of the pole frame welding point and the thickness h4 of the pole plate.

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