Titanium steel composite plate container cavity dividing welding structure

Abstract

The utility model discloses a sub-cavity welding structure of a titanium steel composite plate container. The container is made of a base material layer and a titanium material layer compounded on the inner surface of a base material, the annular splicing seam and the longitudinal splicing seam are formed in the container, an inner V-shaped groove and an outer V-shaped groove are formed in the inner surface and the outer surface of the annular splicing seam and the inner surface and the outer surface of the longitudinal splicing seam respectively, and a cutting groove with the width larger than that of the inner V-shaped groove is cut in the titanium material layer. After the annular splicing seam and the longitudinal splicing seam are welded, the cutting groove can be filled with a titanium base plate completely covering the inner V-shaped groove, and a sealing cover plate completely sealing the titanium base plate is welded to the inner surface of the titanium material layer. The device has the advantages that the protection performance of the welding seam position is high, the reliable sealing performance is ensured, and the welding difficulty is low. The leakage point of the welding seam can be quickly and accurately found, the time for detecting the leakage point of the welding seam is greatly saved, and meanwhile, the leakage detection difficulty is greatly reduced due to the short length of the welding seam; the pressurization time of the pressure test is effectively reduced, and the pressure test efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a manufacturing structure of a titanium steel composite plate container, in particular to a titanium steel composite plate container cavity welding structure, belonging to the technical field of titanium steel composite plate container manufacturing. Background Art

[0002] As global carbon emissions increase and climate warming becomes increasingly serious, the treatment and reuse of wastewater is the most important way to address climate change and achieve sustainable carbon emission reduction. Wet oxidation technology is one of the technologies with a wide range of applications, low secondary pollution and high recycling rate. However, for the oxidation tower of the oxidation reaction, due to its harsh operating environment, the required material requirements are relatively high. At present, a composite tank structure of titanium steel composite plate is commonly used, that is, the outer layer uses steel as the matrix, and the inner layer of the matrix uses composite titanium as an anti-corrosion layer. Therefore, the composite tank structure has the advantages of good corrosion resistance of titanium and high strength of steel plate. However, this type of equipment is generally taller and has longer welds. Therefore, in the manufacturing process of titanium composite plate containers, the titanium cover is a common leakage point during the water pressure test. During the test, there are often the following difficulties: (1) Finding the leakage point of the weld is a difficulty in the manufacturing process One, (2) due to the large structure of the tank body, the pressurization time during the pressure test is long, and the efficiency of the pressure test is very low. (3) during the welding process, due to the inconsistency of the melting points of the titanium layer and the steel plate layer, the titanium layer is easily exposed to the solder during the welding process, which may cause edge warping, deformation, or even partial detachment, thereby affecting the sealing performance and reducing the protective performance of the weld position. This makes the manufacturing difficulty and cost of the sealing plate at the circumferential longitudinal weld high. The two corners of the sealing plate that is currently more commonly used need to be pressed into a concave shape according to the actual convex and concave conditions of the equipment to make it fit with the inner wall of the equipment. This process requires special equipment for pressing, and any slight mismatch can easily cause a cavity in the sealing plate, resulting in an unreliable weld, causing equipment leakage or even scrapping. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a titanium steel composite plate container cavity welding structure with low manufacturing cost, low manufacturing difficulty, and the ability to quickly determine the leakage position, realize fast and effective leak detection and good welding sealing.

[0004] In order to solve the above technical problems, the utility model discloses a titanium-steel composite plate container chamber welding structure, comprising a container made of a substrate layer and a titanium material layer composited with the inner surface of the substrate, and an annular splicing seam and a longitudinal splicing seam on the container, the inner and outer surfaces of the annular splicing seam and the longitudinal splicing seam are respectively provided with an inner V-shaped groove and an outer V-shaped groove, a cutting groove larger than the width of the inner V-shaped groove is cut on the titanium material layer, and after the annular splicing seam and the longitudinal splicing seam are welded, a titanium pad that completely covers the inner V-shaped groove can be filled in the cutting groove, and a sealing cover plate that completely seals the titanium pad is welded on the inner surface of the titanium material layer.

[0005] The titanium pad includes an annular seam plate for covering the annular seam, a longitudinal seam plate for covering the longitudinal seam, and a transition plate for covering the junction of the annular seam and the longitudinal seam. Silver brazing is used between the transition plate and the longitudinal seam plate, and between the transition plate and the annular seam plate. Silver brazing is also used at the joints of the longitudinal seam plates.

[0006] A space for dividing the cavity is provided between the intersection of the annular splicing seam and the longitudinal splicing seam and the joint of the annular seam plate. Titanium sealing welding is adopted between the intersection of the annular splicing seam and the longitudinal splicing seam and the joint of the annular seam plate so that the titanium material layer in the area is completely separated from the substrate layer. Meanwhile, the edge of the transition plate is also welded by titanium sealing welding.

[0007] The sealing cover plate includes an annular sealing plate covering the annular seam plate for sealing and welding the annular seam plate, a longitudinal sealing plate covering the longitudinal seam plate for sealing and welding the longitudinal seam plate, and a T-shaped sealing plate used to cover the intersection of the annular splicing seam and the longitudinal splicing seam.

[0008] The edges on both sides of the upper end of the transition plate are respectively provided with a silver brazing welding section, and the base material layer is provided with a leak detection hole penetrating the sub-cavity.

[0009] Sealing plates are sealed and welded between the annular sealing plates at the joints of the T-shaped sealing plates and the annular seam plates, and between the T-shaped sealing plates and the longitudinal sealing plates.

[0010] The advantages of the utility model are:

[0011] (1) A cutting groove larger than the width of the inner V-shaped groove is cut on the titanium layer, and a titanium pad that completely covers the inner V-shaped groove is filled in the cutting groove, and a sealing cover plate that completely seals the titanium pad is welded on the inner surface of the titanium layer. This avoids the problem of edge warping, deformation, or even partial detachment caused by the titanium layer contacting the solder due to the inconsistent melting points of the titanium layer and the steel plate layer in the traditional welding process, so that the protection performance of the weld position is high, its reliable sealing performance is guaranteed, and the welding difficulty is low.

[0012] (2) By setting a space for dividing the cavity between the intersection of the annular joint seam and the longitudinal joint seam and the joint of the annular seam plate, not only the entire annular seam (including the T-shaped sealing plate part) becomes a separate cavity, but also the longitudinal seam becomes a separate cavity, thereby dividing the traditionally long annular longitudinal weld cavity into several separate cavities that can be independently leak-checked. On the one hand, it is convenient to quickly and accurately find the weld leakage point, which greatly saves the time of checking the weld leakage point. At the same time, due to the short length of the weld, the difficulty of leak detection is also greatly reduced. On the other hand, the pressurization time of the pressure test is effectively reduced, thereby improving the pressure test efficiency.

[0013] (3) The whole structure is reasonably designed. The sealing plate of the specific structure only needs to be pressed out of the curvature according to the curvature of the inner wall of the cylinder using a plate rolling machine or other molds, and then the boss can be pressed out using a mold according to the final weld structure. This is simpler and more practical than the traditional method of using special equipment to press the two corners of the rectangle. It effectively solves the problems of high manufacturing cost, great difficulty and long time-consuming leak detection of the sealing plate of titanium composite plate equipment during leak detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the main structure of the titanium steel composite plate container in the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the main part of the titanium steel composite plate container in the utility model;

[0016] Figure 3 It is a schematic diagram of the partial cross-sectional structure of the titanium steel composite plate container in the utility model;

[0017] Figure 4 It is a schematic diagram of the cross-sectional structure of the cutout groove in the titanium steel composite plate container of the utility model;

[0018] Figure 5 This is a schematic diagram of the welding state in step B of the welding method of the utility model;

[0019] Figure 6 This is a schematic diagram of the welding state in step C of the welding method of the utility model;

[0020] Figure 7 This is a schematic diagram of the welding state in step D of the welding method of the utility model;

[0021] Figure 8 This is a schematic diagram of the welding state in step E of the welding method of the present invention. DETAILED DESCRIPTION

[0022] The titanium-steel composite plate container chamber welding structure of the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] As shown in the figure, the titanium-steel composite plate container cavity welding structure of the utility model includes a container made of a substrate layer 1 and a titanium material layer 2 composited on the inner surface of the substrate, and an annular splicing seam 3 and a longitudinal splicing seam 4 on the container. The inner surface of the annular splicing seam 3 is provided with an inner V-shaped groove 5, and the outer surface of the annular splicing seam 3 is provided with an outer V-shaped groove 6. Similarly, the inner surface of the longitudinal splicing seam 4 is also provided with an inner V-shaped groove 5, and the outer surface of the longitudinal splicing seam 4 is also provided with an outer V-shaped groove 6. A cutting groove 7 located at each inner V-shaped groove 5 and having a width greater than the width of the inner V-shaped groove is cut out on the titanium material layer 2. After the annular joint seam 3 and the longitudinal joint seam 4 are welded, a titanium backing plate 8 that completely covers the inner V-shaped groove can be filled in the cut-out groove. As can be seen from the figure, the titanium backing plate 8 includes an annular seam plate 10 for covering the annular joint seam 3, a longitudinal seam plate 11 for covering the longitudinal joint seam 4, and a transition plate 12 for covering the intersection of the annular joint seam 3 and the longitudinal joint seam 4. Silver brazing is used between the transition plate 12 and the longitudinal seam plate 11 and between the transition plate 12 and the annular seam plate 10. Silver brazing is also used at the joint of the longitudinal seam plate 11. The intersection of the annular joint seam 3 and the longitudinal joint seam 4 and the annular joint seam 3 are connected to the annular joint seam 3. A space for dividing the cavity is provided between the joints of the seam plates 10. Titanium sealing welding is adopted between the intersection of the annular joint seam 3 and the longitudinal joint seam 4 and the joint of the annular seam plate 10 so that the titanium material layer in this area is completely separated from the substrate layer. At the same time, titanium sealing welding is also adopted for the edge of the transition plate 12. The edges on both sides of the upper end of the transition plate 12 are respectively provided with a section of silver brazing welding. A plurality of leak detection holes 16 penetrating the corresponding sub-cavities are provided on the substrate layer 1. A sealing cover plate 9 is welded on the inner surface of the titanium material layer 2 to completely seal the titanium pad. As can be seen from the figure, the sealing cover plate 9 includes a cover on the annular seam plate. The annular sealing plate 13 used for sealing and welding the annular seam plate, the longitudinal sealing plate 14 used for sealing and welding the longitudinal seam plate and the T-shaped sealing plate 15 used for covering the intersection of the annular splicing seam 3 and the longitudinal splicing seam 4, such a structure ensures the absolute isolation of the points on both sides of the leak detection point (that is, the gas will not pass through the internal structure from the left side of the isolation point to the right side of the leak detection point, but must pass through a full circle of annular welds to reach the leak detection point; the same applies to the longitudinal welds). Such a structure divides the originally long welds into several separate cavities, greatly reducing the time and difficulty of finding the leak point.

[0024] Furthermore, sealing plates 17 may be sealed and welded between the annular sealing plate 13 at the joint between the T-shaped sealing plate 15 and the annular seam plate 10 and between the T-shaped sealing plate 15 and the longitudinal sealing plate 14 .

[0025] The specific welding method includes the following steps:

[0026] Before welding the annular joint seam 3 and the longitudinal joint seam 4, the titanium material layer 2 which is 1.5-3 mm (preferably 2 mm) wider than the inner V-shaped groove 5 is removed. This step is to prevent the base material layer from contacting the titanium material layer and causing cracking during welding. After removal, the annular joint seam 3 and the longitudinal joint seam 4 are welded and inspected. If the inspection is qualified, the cavity can be divided. The next step is the cavity structure.

[0027] B. First, the titanium material layer 2 at the intersection of the annular splicing seam 3 and the longitudinal splicing seam 4 is removed to form a cut-out groove 7, and then a transition plate 12 made of the same material as the titanium material layer is placed in the cut-out groove 7, and then the transition plate 12 and the annular seam plate 10 are welded together using silver brazing. At the same time, the gap between the lower end of the transition plate 12 and the longitudinal seam plate 11 is also filled with silver brazing. Similarly, the joint of the annular seam plate 10 is also filled with silver brazing. This joint is set at about 130 mm from the intersection of the annular splicing seam 3 and the longitudinal splicing seam 4. This step is to ensure that there is enough space between the intersection of the annular splicing seam 3 and the longitudinal splicing seam 4 and the joint of the annular seam plate 10, and this part of the space will be used for the annular longitudinal weld cavity;

[0028] Among them, the length of the titanium material layer 2 at the intersection of the removed annular joint seam 3 and the longitudinal joint seam 4 is 80-90mm, the width is 60-70mm, the area of ​​the transition plate 12 is smaller than the cutout groove 7, and the reserved space on the left and right sides of the transition plate 12 is 0.5-1.5mm, and the reserved space on the upper and lower sides is 4-6mm (preferably about 1mm on the left and right sides, 5mm on the upper and lower sides), the thickness is basically the same (it can also be slightly thinner to ensure that there is no cavity), and the upper end of the transition plate 12 is welded with a silver brazing welding section of 8-12mm on the left and right, that is, the upper end of the transition plate needs to be welded 10mm more on the left and right (as shown in the figure),

[0029] C. The annular seam plate 10 between the intersection of the annular seam 3 and the longitudinal seam 4 and the joint of the annular seam plate 10 is welded by titanium sealing welding so that the titanium material layer in this area is completely isolated from the base material layer. Similarly, the edges of both sides of the transition plate 12 are also welded by titanium sealing welding. Except for these two places, the gaps on both sides of the titanium pad 8 at all other places can be welded by titanium intermittent welding;

[0030] D. Cover the annular sealing plate 13 with a width of about 20 mm greater than the width of the annular seam plate on the annular seam plate and weld it with titanium sealing welding on all sides; cover the longitudinal sealing plate 14 with a width greater than the longitudinal seam plate on the longitudinal seam plate and weld it with titanium sealing welding on all sides; cover the intersection of the annular joint seam 3 and the longitudinal joint seam 4 with a T-shaped sealing plate 15 and weld it with titanium sealing welding on all sides; then weld the annular sealing plate 13 and the longitudinal sealing plate 14 to the T-shaped sealing plate 15 respectively with titanium sealing welding; wherein, the size of the sealing cover plate 9 is slightly larger than the side length of the titanium pad by 10 mm (as shown in the figure); the T-shaped sealing plate 15 needs to be close to the annular sealing plate 13 on one side, and leave a gap of about 10 mm on the other side.

[0031] E. Finally, place a sealing plate at the joint of the T-shaped sealing plate 15 and the annular seam plate 10, and place a sealing plate 17 between the T-shaped sealing plate 15 and the longitudinal sealing plate 14 for sealing and welding.

[0032] Furthermore, in step E, during welding, 8-12 mm (preferably 10 mm) of the sealing plate 17 is reserved for welding, and then the welding is performed after exhausting.

[0033] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A titanium steel composite plate container chamber welding structure, characterized in that: The invention comprises a container made of a base material layer (1) and a titanium material layer (2) composited with the inner surface of the base material layer, and an annular joint seam (3) and a longitudinal joint seam (4) on the container, characterized in that: the inner and outer surfaces of the annular joint seam (3) and the longitudinal joint seam (4) are respectively provided with an inner V-shaped groove (5) and an outer V-shaped groove (6), the titanium material layer (2) is cut with a cutting groove (7) having a width greater than the inner V-shaped groove, and after the annular joint seam (3) and the longitudinal joint seam (4) are welded, a titanium pad (8) that completely covers the inner V-shaped groove can be filled in the cutting groove, and a sealing cover plate (9) that completely seals the titanium pad is welded to the inner surface of the titanium material layer (2).

2. The titanium steel composite plate container chamber welding structure according to claim 1 is characterized in that: The titanium backing plate (8) comprises an annular seam plate (10) for covering the annular joint seam (3), a longitudinal seam plate (11) for covering the longitudinal joint seam (4), and a transition plate (12) for covering the junction between the annular joint seam (3) and the longitudinal seam seam (4), wherein the transition plate (12) and the longitudinal seam plate (11) and the transition plate (12) and the annular seam plate (10) are both welded by silver brazing, and the joints of the longitudinal seam plate (11) are also welded by silver brazing.

3. The titanium steel composite plate container chamber welding structure according to claim 2 is characterized in that: A space for dividing the cavity is provided between the intersection of the annular joint seam (3) and the longitudinal joint seam (4) and the joint of the annular joint plate (10). Titanium sealing welding is used to weld the intersection of the annular joint seam (3) and the longitudinal joint seam (4) and the joint of the annular joint plate (10) so that the titanium material layer in the area is completely separated from the base material layer. At the same time, the edge of the transition plate (12) is also welded by titanium sealing welding.

4. The titanium steel composite plate container chamber welding structure according to claim 3 is characterized in that: The sealing cover plate (9) comprises an annular sealing plate (13) covering the annular seam plate for sealing and welding the annular seam plate, a longitudinal sealing plate (14) covering the longitudinal seam plate for sealing and welding the longitudinal seam plate, and a T-shaped sealing plate (15) for covering the intersection of the annular joint seam (3) and the longitudinal joint seam (4).

5. The titanium steel composite plate container chamber welding structure according to claim 4 is characterized in that: The edges on both sides of the upper end of the transition plate (12) are respectively provided with a silver brazing welding section, and the base material layer (1) is provided with a leak detection hole (16) penetrating the sub-cavity.

6. The titanium steel composite plate container chamber welding structure according to claim 5 is characterized in that: A sealing plate (17) is seal-welded between the annular sealing plate (13) at the joint between the T-shaped sealing plate (15) and the annular seam plate (10), and between the T-shaped sealing plate (15) and the longitudinal sealing plate (14).

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