Welding Structure, Concrete Mixer Truck and Welding Process

Abstract

The present application provides a welding structure, a concrete mixer truck and a welding process. The welding structure includes: a spherical crown, the spherical crown including a first fitting surface; a flange, the flange including a second fitting surface, the second fitting surface being fitted with the first fitting surface; wherein, the first fitting surface and the second fitting surface are connected by welding. In the present application, the lap joint between the spherical crown and the flange is surface contact, which increases the contact area between the spherical crown and the flange, thereby dispersing the stress at the lap joint, increasing the connection strength, and reducing the possibility of weld cracking between the spherical crown and the flange.

Description

Technical Field

[0001] This application relates to the technical field of concrete mixer trucks, and more specifically, to a welding structure, a concrete mixer truck, and a welding process. Background Art

[0002] When the concrete mixer truck is in the working state, the spherical crown assembly is subjected to the torque transmitted from the speed reducer and the pressure of the internal concrete. Especially when the mixing drum switches between forward and reverse rotation or the vehicle brakes, the torque or impact force on the spherical crown part is relatively large. Currently, the spherical crown and the flange are welded in an angular connection manner, with relatively large welding stress, and the weld at the connection between the flange and the spherical crown is prone to cracking. Summary of the Invention

[0003] This application aims to solve at least one of the above technical problems.

[0004] To this end, the first object of this application is to provide a welding structure.

[0005] The second object of this application is to provide a concrete mixer truck.

[0006] The third object of this application is to provide a welding process.

[0007] To achieve the first object of this application, the technical solution of this application provides a welding structure, including: a spherical crown, the spherical crown includes a first mating surface; a flange, the flange includes a second mating surface, and the second mating surface is in contact with the first mating surface; wherein, the first mating surface and the second mating surface are welded together.

[0008] According to the welding structure provided by this application, it includes a spherical crown and a flange. The spherical crown includes a first mating surface, the flange includes a second mating surface, and the spherical crown and the flange are overlapped by the contact between the first mating surface and the second mating surface. The first mating surface and the second mating surface are welded together to connect the spherical crown and the flange. Since the overlapping part of the spherical crown and the flange is in surface contact, compared with angular overlap, it increases the contact area between the spherical crown and the flange, thereby dispersing the stress at the overlapping part, increasing the connection strength, and reducing the possibility of weld cracking between the spherical crown and the flange.

[0009] In addition, the technical solution provided by this application may also have the following additional technical features:

[0010] In the above technical solution, the spherical crown is a hollow structure, the spherical crown includes a connecting part and a mating part, the connecting part and the mating part are respectively located at both ends of the spherical crown, the mating part has an outer surface and an inner surface, and the connecting part is used to connect the mixing drum; the flange includes a welding section and a connecting section, the cross-sectional area of the welding section is larger than that of the connecting section, the welding section includes a first flange surface and a second flange surface, the first flange surface is located on the side away from the connecting section, and the second flange surface is located on the side close to the connecting section.

[0011] In this technical solution, the spherical crown is a hollow structure, including a connecting part and a fitting part. The connecting part is located at one end of the spherical crown and is connected to the mixing drum to seal the mixing drum. The fitting part is located at the other end of the spherical crown and has an outer surface and an inner surface for connecting with the flange. The flange includes a welding section and a connecting section. The cross-sectional area of the welding section is larger than that of the connecting section. The welding section includes a first flange surface and a second flange surface. The first flange surface is located on the side away from the connecting section, and the second flange surface is located on the side close to the connecting section. The first flange surface or the second flange surface is used to connect with the spherical crown.

[0012] In the above technical solution, the first fitting surface is located on the outer surface; the second fitting surface is located on the first flange surface; or the first fitting surface is located on the inner surface; the second fitting surface is located on the second flange surface.

[0013] In this technical solution, the first fitting surface is located on the outer surface and the second fitting surface is located on the first flange surface. Or the first fitting surface is located on the inner surface and the second fitting surface is located on the second flange surface. By fitting the outer surface of the fitting part with the first flange surface of the flange, or inserting the flange into the spherical crown so that the second flange surface of the flange fits with the inner surface of the fitting part, the contact area between the spherical crown and the flange can be increased, thereby dispersing the stress at the lap joint and increasing the connection strength.

[0014] In the above technical solution, a circumferential weld is provided between the first fitting surface and the second fitting surface.

[0015] In this technical solution, a circumferential weld is provided between the first fitting surface and the second fitting surface. Since the fitting edge between the first fitting surface and the second fitting surface is circular, the spherical crown and the flange can be connected by circumferential welding. Circumferential welding is beneficial to evenly disperse the stress and avoid the situation of excessive local stress, thereby further reducing the possibility of weld cracking between the spherical crown and the flange.

[0016] In the above technical solution, the circumferential weld is located at the fitting edge between the first fitting surface and the second fitting surface.

[0017] In this technical solution, the circumferential weld is located at the fitting edge between the first fitting surface and the second fitting surface. When the first fitting surface and the second fitting surface are fitted, the fitting edge includes two circumferential seams. By circumferentially welding along the fitting edge of the first fitting surface and the second fitting surface, the diameter of the circumferential welding is increased, thereby reducing the stress at the weld and avoiding excessive stress concentration.

[0018] In the above technical solution, a plug weld is further included between the first fitting surface and the second fitting surface.

[0019] In this technical solution, a plug weld is further included between the first fitting surface and the second fitting surface. The plug weld is used for plug welding connection. By plug welding to connect the first fitting surface and the second fitting surface, the connection strength between the spherical crown and the flange can be enhanced.

[0020] In the above technical solution, the plug weld is located at the middle position of the first joint surface.

[0021] In this technical solution, the plug weld is located at the middle position of the first joint surface. The first joint surface and the second joint surface are connected by plug welding through the plug weld, which can further enhance the connection strength between the spherical crown and the flange. The plug weld is at the middle position and the circumferential weld is around. On the one hand, it improves the strength, and on the other hand, it is beneficial to the uniform dispersion of stress and reduces the situation of stress concentration on one side.

[0022] In the above technical solution, the welding structure further includes: a coiled pipe, which is located on one side of the flange close to the connecting part and is connected to the flange; a reinforcing cone, which connects the spherical crown and the coiled pipe.

[0023] In this technical solution, the welding structure further includes a coiled pipe and a reinforcing cone. The coiled pipe is located on one side of the flange close to the connecting part and is connected to the flange. One end of the reinforcing cone is connected to the spherical crown and the other end is connected to the coiled pipe. The spherical crown is reinforced by the reinforcing cone, enhancing the reliability of the welding structure.

[0024] In the above technical solution, the welding structure further includes: a spherical crown support plate, which is located in the space enclosed by the coiled pipe, the reinforcing cone and the spherical crown. One end of the spherical crown support plate is connected to the coiled pipe and the other end is connected to the spherical crown.

[0025] In this technical solution, the welding structure further includes a spherical crown support plate. The spherical crown support plate is located in the space enclosed by the coiled pipe, the reinforcing cone and the spherical crown. One end of the spherical crown support plate is connected to the coiled pipe and the other end is connected to the spherical crown. By connecting the coiled pipe and the spherical crown through the spherical crown support plate, the strength of the spherical crown is enhanced, and the reliability of the welding structure is enhanced.

[0026] To achieve the second object of the present application, the technical solution of the present application provides a concrete mixer truck, including: a mixing drum; a welding structure according to any one of the above technical solutions of the present application, which is connected to the mixing drum.

[0027] According to the concrete mixer truck provided by the present application, including a mixing drum and a welding structure according to any one of the above technical solutions of the present application, it thus has all the beneficial effects of the welding structure according to any one of the above technical solutions of the present application, which will not be elaborated here. The welding structure is connected to the mixing drum and is used to seal the mixing drum.

[0028] To achieve the third object of the present application, the technical solution of the present application provides a welding process for a welding structure according to any one of the above technical solutions of the present application, including: fitting the first joint surface on the spherical crown and the second joint surface on the flange; performing circumferential welding through the circumferential seam at the fitting edge of the first joint surface and the second joint surface; performing plug welding on the spherical crown and the flange through the opening in the middle of the first joint surface.

[0029] According to the welding process provided by the present application, first, the first fitting surface on the spherical crown is fitted to the second fitting surface on the flange, then circumferential welding is performed through the circumferential seam at the fitting edge of the first fitting surface and the second fitting surface, and finally plug welding is performed on the spherical crown and the flange through the opening in the middle of the first fitting surface. The lap joint form between the spherical crown and the flange is changed from an angular lap to a surface lap, increasing the contact area and plug welding holes, thereby increasing the connection strength. By performing circumferential welding through the circumferential seam at the fitting edge of the first fitting surface and the second fitting surface, the diameter of the circumferential weld is increased, the stress at the weld is reduced, and excessive stress concentration is avoided.

[0030] The additional aspects and advantages of the present application will become apparent in the following description section or be learned through the practice of the present application. Brief Description of the Drawings

[0031] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0032] Figure 1 is a schematic cross-sectional structure diagram of a welding structure according to an embodiment of the present application;

[0033] Figure 2 is Figure 1 an enlarged structure diagram of part A in

[0034] Figure 3 is a partial cross-sectional structure diagram of a welding structure according to an embodiment of the present application;

[0035] Figure 4 is a schematic cross-sectional structure diagram of a welding structure according to an embodiment of the present application;

[0036] Figure 5 is a schematic block diagram of the structure of a concrete mixer truck according to an embodiment of the present application;

[0037] Figure 6 is a schematic flow diagram of a welding process according to an embodiment of the present application.

[0038] Among them, Figures 1 to 5 the corresponding relationship between the reference numerals in the drawings and the component names is:

[0039] 10: welding structure; 110: spherical crown; 112: first fitting surface; 120: flange; 122: second fitting surface; 130: coiled pipe; 140: reinforcing cone; 150: spherical crown support plate: 160: circumferential weld; 170: plug weld; 20: concrete mixer truck: 200: mixing drum. Detailed Description of the Embodiments

[0040] To more clearly understand the above-mentioned objects, features, and advantages of the present application, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0041] In the following description, many specific details are set forth in order to fully understand the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.

[0042] The following refers to Figures 1 to 6 Describe the welding structure, concrete mixer truck, and welding process of some embodiments of the present application.

[0043] Embodiment 1:

[0044] As Figure 1 and Figure 2 shown, this embodiment provides a welding structure 10, including a spherical crown 110 and a flange 120. Specifically, the spherical crown 110 includes a first fitting surface 112, the flange 120 includes a second fitting surface 122, and the second fitting surface 122 is fitted with the first fitting surface 112. Among them, the first fitting surface 112 and the second fitting surface 122 are connected by welding.

[0045] According to the welding structure 10 provided in this embodiment, it includes a spherical crown 110 and a flange 120. The spherical crown 110 includes a first fitting surface 112, the flange 120 includes a second fitting surface 122, and the spherical crown 110 and the flange 120 are overlapped by fitting the first fitting surface 112 and the second fitting surface 122. The first fitting surface 112 and the second fitting surface 122 are connected by welding, thereby connecting the spherical crown 110 and the flange 120. Since the overlapping part of the spherical crown 110 and the flange 120 is surface contact, compared with corner overlap, the contact area between the spherical crown 110 and the flange 120 is increased, thereby dispersing the stress at the overlapping part, increasing the connection strength, and reducing the possibility of weld cracking between the spherical crown 110 and the flange 120.

[0046] Embodiment 2:

[0047] As Figure 1 and Figure 2 shown, this embodiment provides a welding structure 10, including a spherical crown 110 and a flange 120. Specifically, the spherical crown 110 includes a first fitting surface 112, the flange 120 includes a second fitting surface 122, and the second fitting surface 122 is fitted with the first fitting surface 112. Among them, the first fitting surface 112 and the second fitting surface 122 are connected by welding.

[0048] According to the welding structure 10 provided by this embodiment, it includes a spherical crown 110 and a flange 120. The spherical crown 110 includes a first fitting surface 112, and the flange 120 includes a second fitting surface 122. The spherical crown 110 and the flange 120 are overlapped by fitting the first fitting surface 112 and the second fitting surface 122. The first fitting surface 112 and the second fitting surface 122 are welded together to connect the spherical crown 110 and the flange 120. Since the overlapping part of the spherical crown 110 and the flange 120 is surface contact, compared with corner overlapping, it increases the contact area between the spherical crown 110 and the flange 120, thereby dispersing the stress at the overlapping part, increasing the connection strength, and reducing the possibility of weld cracking between the spherical crown 110 and the flange 120.

[0049] Furthermore, the spherical crown 110 is a hollow structure, including a connecting part and a fitting part. The connecting part is located at one end of the spherical crown 110 and is connected to the mixing drum 200 to seal the mixing drum 200. The fitting part is located at the other end of the spherical crown 110 and has an outer surface and an inner surface for connecting with the flange 120. The flange 120 includes a welding section and a connecting section. The cross-sectional area of the welding section is larger than that of the connecting section. The welding section includes a first flange surface and a second flange surface. The first flange surface is located on the side away from the connecting section, and the second flange surface is located on the side close to the connecting section. The first flange surface or the second flange surface is used to connect with the spherical crown 110.

[0050] Embodiment 3:

[0051] As Figure 1 and Figure 2 shown, this embodiment provides a welding structure 10, including a spherical crown 110 and a flange 120. Specifically, the spherical crown 110 includes a first fitting surface 112, the flange 120 includes a second fitting surface 122, and the second fitting surface 122 fits with the first fitting surface 112. Among them, the first fitting surface 112 and the second fitting surface 122 are welded together.

[0052] According to the welding structure 10 provided by this embodiment, it includes a spherical crown 110 and a flange 120. The spherical crown 110 includes a first fitting surface 112, the flange 120 includes a second fitting surface 122. The spherical crown 110 and the flange 120 are overlapped by fitting the first fitting surface 112 and the second fitting surface 122. The first fitting surface 112 and the second fitting surface 122 are welded together to connect the spherical crown 110 and the flange 120. Since the overlapping part of the spherical crown 110 and the flange 120 is surface contact, compared with corner overlapping, it increases the contact area between the spherical crown 110 and the flange 120, thereby dispersing the stress at the overlapping part, increasing the connection strength, and reducing the possibility of weld cracking between the spherical crown 110 and the flange 120.

[0053] Further, the spherical crown 110 is a hollow structure, including a connecting portion and a fitting portion. The connecting portion is located at one end of the spherical crown 110 and is connected to the mixing drum 200 to seal the mixing drum 200. The fitting portion is located at the other end of the spherical crown 110 and has an outer surface and an inner surface for connecting to the flange 120. The flange 120 includes a welding section and a connecting section. The cross-sectional area of the welding section is larger than that of the connecting section. The welding section includes a first flange surface and a second flange surface. The first flange surface is located on the side away from the connecting section, and the second flange surface is located on the side close to the connecting section. The first flange surface or the second flange surface is used to connect to the spherical crown 110.

[0054] As Figure 1 and Figure 4 shown, further, the first fitting surface 112 is located on the outer surface, and the second fitting surface 122 is located on the first flange surface. Or the first fitting surface 112 is located on the inner surface, and the second fitting surface 122 is located on the second flange surface. By fitting the outer surface of the fitting portion to the first flange surface of the flange 120, or inserting the flange 120 into the spherical crown 110 so that the second flange surface of the flange 120 fits the inner surface of the fitting portion, the contact area between the spherical crown 110 and the flange 120 can be increased, thereby dispersing the stress at the lap joint and increasing the connection strength.

[0055] Embodiment 4:

[0056] As Figure 1 and Figure 2 shown, this embodiment provides a welding structure 10, including a spherical crown 110 and a flange 120. Specifically, the spherical crown 110 includes a first fitting surface 112, and the flange 120 includes a second fitting surface 122, and the second fitting surface 122 fits the first fitting surface 112. Among them, the first fitting surface 112 and the second fitting surface 122 are connected by welding.

[0057] According to the welding structure 10 provided by this embodiment, it includes a spherical crown 110 and a flange 120. The spherical crown 110 includes a first fitting surface 112, and the flange 120 includes a second fitting surface 122. The spherical crown 110 and the flange 120 are overlapped by fitting the first fitting surface 112 and the second fitting surface 122. The first fitting surface 112 and the second fitting surface 122 are connected by welding to connect the spherical crown 110 and the flange 120. Since the lap joint between the spherical crown 110 and the flange 120 is a surface contact, compared with an angular lap joint, the contact area between the spherical crown 110 and the flange 120 is increased, thereby dispersing the stress at the lap joint, increasing the connection strength, and reducing the possibility of weld cracking between the spherical crown 110 and the flange 120.

[0058] Further, the spherical crown 110 has a hollow structure and includes a connecting portion and a fitting portion. The connecting portion is located at one end of the spherical crown 110 and is connected to the mixing drum 200 to seal the mixing drum 200. The fitting portion is located at the other end of the spherical crown 110 and has an outer surface and an inner surface for connecting to the flange 120. The flange 120 includes a welding section and a connecting section. The cross-sectional area of the welding section is larger than that of the connecting section. The welding section includes a first flange surface and a second flange surface. The first flange surface is located on the side away from the connecting section, and the second flange surface is located on the side close to the connecting section. Either the first flange surface or the second flange surface is used to connect to the spherical crown 110.

[0059] As Figure 1 and Figure 4 shown, further, the first fitting surface 112 is located on the outer surface, and the second fitting surface 122 is located on the first flange surface. Or the first fitting surface 112 is located on the inner surface, and the second fitting surface 122 is located on the second flange surface. By fitting the outer surface of the fitting portion to the first flange surface of the flange 120, or inserting the flange 120 into the spherical crown 110 and fitting the second flange surface of the flange 120 to the inner surface of the fitting portion, the contact area between the spherical crown 110 and the flange 120 can be increased, thereby dispersing the stress at the lap joint and increasing the connection strength.

[0060] As Figure 3 shown, further, an annular weld 160 is provided between the first fitting surface 112 and the second fitting surface 122 for circumferential welding. Since the fitting edge between the first fitting surface 112 and the second fitting surface 122 is circular, the spherical crown 110 and the flange 120 can be connected by circumferential welding. Circumferential welding is beneficial to evenly disperse the stress and avoid the situation of excessive local stress, thereby further reducing the possibility of weld cracking between the spherical crown 110 and the flange 120.

[0061] Embodiment 5:

[0062] As Figure 1 and Figure 2 shown, this embodiment provides a welding structure 10, including a spherical crown 110 and a flange 120. Specifically, the spherical crown 110 includes a first fitting surface 112, and the flange 120 includes a second fitting surface 122, and the second fitting surface 122 is fitted to the first fitting surface 112. Among them, the first fitting surface 112 and the second fitting surface 122 are connected by welding.

[0063] According to the welding structure 10 provided by this embodiment, it includes a spherical crown 110 and a flange 120. The spherical crown 110 includes a first fitting surface 112, and the flange 120 includes a second fitting surface 122. The spherical crown 110 and the flange 120 are overlapped by fitting through the first fitting surface 112 and the second fitting surface 122. The first fitting surface 112 and the second fitting surface 122 are welded together to connect the spherical crown 110 and the flange 120. Since the overlapping part of the spherical crown 110 and the flange 120 is surface contact, compared with angular overlap, it increases the contact area between the spherical crown 110 and the flange 120, thereby dispersing the stress at the overlapping part, increasing the connection strength, and reducing the possibility of weld cracking between the spherical crown 110 and the flange 120.

[0064] Further, the spherical crown 110 is a hollow structure, including a connecting part and a fitting part. The connecting part is located at one end of the spherical crown 110 and is connected to the mixing drum 200 to seal the mixing drum 200. The fitting part is located at the other end of the spherical crown 110 and has an outer surface and an inner surface for connecting with the flange 120. The flange 120 includes a welding section and a connecting section. The cross-sectional area of the welding section is larger than that of the connecting section. The welding section includes a first flange surface and a second flange surface. The first flange surface is located on the side away from the connecting section, and the second flange surface is located on the side close to the connecting section. The first flange surface or the second flange surface is used to connect with the spherical crown 110.

[0065] As Figure 1 and Figure 4 shown, further, the first fitting surface 112 is located on the outer surface, and the second fitting surface 122 is located on the first flange surface. Or the first fitting surface 112 is located on the inner surface, and the second fitting surface 122 is located on the second flange surface. By fitting the outer surface of the fitting part with the first flange surface of the flange 120, or inserting the flange 120 into the spherical crown 110 and fitting the second flange surface of the flange 120 with the inner surface of the fitting part, it can increase the contact area between the spherical crown 110 and the flange 120, thereby dispersing the stress at the overlapping part and increasing the connection strength.

[0066] As Figure 3 shown, further, an annular weld 160 is provided between the first fitting surface 112 and the second fitting surface 122 for circumferential welding. Since the fitting edge of the first fitting surface 112 and the second fitting surface 122 is circular, the spherical crown 110 and the flange 120 can be connected by circumferential welding. Circumferential welding is beneficial to evenly disperse stress and avoid the situation of excessive local stress, thereby further reducing the possibility of weld cracking between the spherical crown 110 and the flange 120.

[0067] Further, the circumferential weld 160 is located at the joint edge of the first joint surface 112 and the second joint surface 122. When the first joint surface 112 and the second joint surface 122 are jointed, the joint edge includes two circumferential seams. Welding is performed along the circumferential seam at the joint edge of the first joint surface 112 and the second joint surface 122, increasing the diameter of the circumferential seam welding, thereby reducing the stress at the weld and avoiding excessive stress concentration.

[0068] Embodiment 6:

[0069] As Figure 1 and Figure 2 shown, this embodiment provides a welding structure 10, including a spherical crown 110 and a flange 120. Specifically, the spherical crown 110 includes a first joint surface 112, and the flange 120 includes a second joint surface 122, and the second joint surface 122 is jointed with the first joint surface 112. Among them, the first joint surface 112 and the second joint surface 122 are connected by welding.

[0070] According to the welding structure 10 provided by this embodiment, it includes a spherical crown 110 and a flange 120. The spherical crown 110 includes a first joint surface 112, and the flange 120 includes a second joint surface 122. The spherical crown 110 and the flange 120 are overlapped by jointing the first joint surface 112 and the second joint surface 122. The first joint surface 112 and the second joint surface 122 are connected by welding, thereby connecting the spherical crown 110 and the flange 120. Since the overlapping part of the spherical crown 110 and the flange 120 is surface contact, compared with angular overlap, the contact area between the spherical crown 110 and the flange 120 is increased, thereby dispersing the stress at the overlapping part, increasing the connection strength, and reducing the possibility of weld cracking between the spherical crown 110 and the flange 120.

[0071] Further, the spherical crown 110 is a hollow structure, including a connecting part and a jointing part. The connecting part is located at one end of the spherical crown 110 and is connected to the mixing drum 200 to seal the mixing drum 200. The jointing part is located at the other end of the spherical crown 110 and has an outer surface and an inner surface for connecting with the flange 120. The flange 120 includes a welding section and a connecting section. The cross-sectional area of the welding section is larger than that of the connecting section. The welding section includes a first flange surface and a second flange surface. The first flange surface is located on the side far from the connecting section, and the second flange surface is located on the side close to the connecting section. The first flange surface or the second flange surface is used to connect with the spherical crown 110.

[0072] As Figure 1 and Figure 4As shown in the figure, further, the first fitting surface 112 is located on the outer surface, and the second fitting surface 122 is located on the first flange surface. Or the first fitting surface 112 is located on the inner surface, and the second fitting surface 122 is located on the second flange surface. By fitting the outer surface of the fitting portion to the first flange surface of the flange 120, or inserting the flange 120 into the spherical crown 110 and fitting the second flange surface of the flange 120 to the inner surface of the fitting portion, the contact area between the spherical crown 110 and the flange 120 can be increased, thereby dispersing the stress at the lap joint and increasing the connection strength.

[0073] As Figure 3 shown in the figure, further, an annular weld 160 is provided between the first fitting surface 112 and the second fitting surface 122 for circumferential welding. Since the fitting edge between the first fitting surface 112 and the second fitting surface 122 is circular, the spherical crown 110 and the flange 120 can be connected by circumferential welding. Circumferential welding is beneficial to evenly disperse the stress and avoid the situation of excessive local stress, thereby further reducing the possibility of weld cracking between the spherical crown 110 and the flange 120.

[0074] Further, the annular weld 160 is located at the fitting edge of the first fitting surface 112 and the second fitting surface 122. When the first fitting surface 112 and the second fitting surface 122 are fitted, the fitting edge includes two circumferential seams. Circumferential welding along the fitting edge of the first fitting surface 112 and the second fitting surface 122 increases the diameter of the circumferential welding, thereby reducing the stress at the weld and avoiding excessive stress concentration.

[0075] Further, a plug weld 170 is also included between the first fitting surface 112 and the second fitting surface 122, and the plug weld 170 is used for plug welding connection. By plug welding the first fitting surface 112 and the second fitting surface 122, the connection strength between the spherical crown 110 and the flange 120 can be enhanced.

[0076] Embodiment 7:

[0077] As Figure 1 and Figure 2 shown in the figure, this embodiment provides a welding structure 10, including a spherical crown 110 and a flange 120. Specifically, the spherical crown 110 includes a first fitting surface 112, the flange 120 includes a second fitting surface 122, and the second fitting surface 122 is fitted to the first fitting surface 112. Among them, the first fitting surface 112 and the second fitting surface 122 are connected by welding.

[0078] According to the welding structure 10 provided by this embodiment, it includes a spherical crown 110 and a flange 120. The spherical crown 110 includes a first fitting surface 112, and the flange 120 includes a second fitting surface 122. The spherical crown 110 and the flange 120 are overlapped by fitting through the first fitting surface 112 and the second fitting surface 122. The first fitting surface 112 and the second fitting surface 122 are welded together to connect the spherical crown 110 and the flange 120. Since the overlapping part of the spherical crown 110 and the flange 120 is surface contact, compared with corner overlapping, the contact area between the spherical crown 110 and the flange 120 is increased, thereby dispersing the stress at the overlapping part, increasing the connection strength, and reducing the possibility of weld cracking between the spherical crown 110 and the flange 120.

[0079] Further, the spherical crown 110 is a hollow structure, including a connecting part and a fitting part. The connecting part is located at one end of the spherical crown 110 and is connected to the mixing drum 200 to seal the mixing drum 200. The fitting part is located at the other end of the spherical crown 110 and has an outer surface and an inner surface for connecting with the flange 120. The flange 120 includes a welding section and a connecting section. The cross-sectional area of the welding section is larger than that of the connecting section. The welding section includes a first flange surface and a second flange surface. The first flange surface is located on the side away from the connecting section, and the second flange surface is located on the side close to the connecting section. The first flange surface or the second flange surface is used to connect with the spherical crown 110.

[0080] As Figure 1 and Figure 4 shown, further, the first fitting surface 112 is located on the outer surface, and the second fitting surface 122 is located on the first flange surface. Or the first fitting surface 112 is located on the inner surface, and the second fitting surface 122 is located on the second flange surface. By fitting the outer surface of the fitting part with the first flange surface of the flange 120, or inserting the flange 120 into the spherical crown 110 and fitting the second flange surface of the flange 120 with the inner surface of the fitting part, the contact area between the spherical crown 110 and the flange 120 can be increased, thereby dispersing the stress at the overlapping part and increasing the connection strength.

[0081] As Figure 3 shown, further, an annular weld 160 is provided between the first fitting surface 112 and the second fitting surface 122 for circumferential welding. Since the fitting edge between the first fitting surface 112 and the second fitting surface 122 is circular, the spherical crown 110 and the flange 120 can be connected by circumferential welding. Circumferential welding is beneficial to evenly disperse the stress and avoid the situation of excessive local stress, thereby further reducing the possibility of weld cracking between the spherical crown 110 and the flange 120.

[0082] Further, the circumferential weld 160 is located at the fitting edge of the first fitting surface 112 and the second fitting surface 122. When the first fitting surface 112 and the second fitting surface 122 are fitted, the fitting edge includes two circumferential seams. By performing circumferential seam welding along the fitting edge of the first fitting surface 112 and the second fitting surface 122, the diameter of the circumferential seam welding is increased, thereby reducing the stress at the weld and avoiding excessive stress concentration.

[0083] Further, a plug weld seam 170 is further included between the first fitting surface 112 and the second fitting surface 122. The plug weld seam 170 is used for plug welding connection. By plug welding to connect the first fitting surface 112 and the second fitting surface 122, the connection strength between the spherical crown 110 and the flange 120 can be enhanced.

[0084] Further, the plug weld seam 170 is located at the middle position of the first fitting surface 112. The plug weld seam 170 is used for plug welding. By performing plug welding connection between the first fitting surface 112 and the second fitting surface 122 through the plug weld seam 170, the connection strength between the spherical crown 110 and the flange 120 can be further enhanced. The plug weld seam is at the middle position and the circumferential weld is around. On the one hand, the strength is improved, and on the other hand, it is beneficial to the uniform dispersion of stress and reduces the situation of stress concentration on one side.

[0085] Embodiment 8:

[0086] As Figure 1 and Figure 2 shown, this embodiment provides a welding structure 10, including a spherical crown 110 and a flange 120. Specifically, the spherical crown 110 includes a first fitting surface 112, the flange 120 includes a second fitting surface 122, and the second fitting surface 122 is fitted with the first fitting surface 112. Among them, the first fitting surface 112 and the second fitting surface 122 are welded and connected.

[0087] According to the welding structure 10 provided by this embodiment, it includes a spherical crown 110 and a flange 120. The spherical crown 110 includes a first fitting surface 112, the flange 120 includes a second fitting surface 122, and the spherical crown 110 and the flange 120 are overlapped by fitting through the first fitting surface 112 and the second fitting surface 122. The first fitting surface 112 and the second fitting surface 122 are welded and connected, thereby connecting the spherical crown 110 and the flange 120. Since the overlapping part of the spherical crown 110 and the flange 120 is surface contact, compared with angular overlap, the contact area between the spherical crown 110 and the flange 120 is increased, thereby dispersing the stress at the overlapping part, increasing the connection strength, and reducing the possibility of weld cracking between the spherical crown 110 and the flange 120.

[0088] Further, the spherical crown 110 has a hollow structure and includes a connecting portion and a fitting portion. The connecting portion is located at one end of the spherical crown 110 and is connected to the mixing drum 200 to seal the mixing drum 200. The fitting portion is located at the other end of the spherical crown 110 and has an outer surface and an inner surface for connecting to the flange 120. The flange 120 includes a welding section and a connecting section. The cross-sectional area of the welding section is larger than that of the connecting section. The welding section includes a first flange surface and a second flange surface. The first flange surface is located on the side away from the connecting section, and the second flange surface is located on the side close to the connecting section. The first flange surface or the second flange surface is used to connect to the spherical crown 110.

[0089] As Figure 1 and Figure 4 shown, further, the first fitting surface 112 is located on the outer surface, and the second fitting surface 122 is located on the first flange surface. Or the first fitting surface 112 is located on the inner surface, and the second fitting surface 122 is located on the second flange surface. By fitting the outer surface of the fitting portion to the first flange surface of the flange 120, or inserting the flange 120 into the spherical crown 110 so that the second flange surface of the flange 120 fits the inner surface of the fitting portion, the contact area between the spherical crown 110 and the flange 120 can be increased, thereby dispersing the stress at the lap joint and increasing the connection strength.

[0090] As Figure 3 shown, further, an annular weld 160 is provided between the first fitting surface 112 and the second fitting surface 122 for circumferential welding. Since the fitting edge between the first fitting surface 112 and the second fitting surface 122 is circular, the spherical crown 110 and the flange 120 can be connected by circumferential welding. Circumferential welding is beneficial to evenly disperse the stress and avoid the situation of excessive local stress, thereby further reducing the possibility of weld cracking between the spherical crown 110 and the flange 120.

[0091] Further, the annular weld 160 is located at the fitting edge of the first fitting surface 112 and the second fitting surface 122. When the first fitting surface 112 and the second fitting surface 122 are fitted, the fitting edge includes two circumferential seams. Circumferential welding along the fitting edge of the first fitting surface 112 and the second fitting surface 122 increases the diameter of the circumferential welding, thereby reducing the stress at the weld and avoiding excessive stress concentration.

[0092] Further, a plug weld 170 is also included between the first fitting surface 112 and the second fitting surface 122. The plug weld 170 is used for plug welding connection. By plug welding the first fitting surface 112 and the second fitting surface 122, the connection strength between the spherical crown 110 and the flange 120 can be enhanced.

[0093] Furthermore, the plug weld seam 170 is located at the middle position of the first joint surface 112. The plug weld seam 170 is used for plug welding. The first joint surface 112 and the second joint surface 122 are connected by plug welding through the plug weld seam 170, which can further enhance the connection strength between the spherical crown 110 and the flange 120. The plug weld seam is at the middle position and the circumferential weld seam is around. On the one hand, it improves the strength, and on the other hand, it is conducive to the uniform dispersion of stress and reduces the situation of stress concentration on one side.

[0094] Furthermore, the welding structure 10 further includes a coiled pipe 130 and a reinforcing cone 140. The coiled pipe 130 is located on the side of the flange 120 close to the connecting part and is connected to the flange 120. One end of the reinforcing cone 140 is connected to the spherical crown 110, and the other end is connected to the coiled pipe 130. The spherical crown 110 is reinforced by the reinforcing cone 140, enhancing the reliability of the welding structure 10.

[0095] Embodiment 9:

[0096] As Figure 1 and Figure 2 shown, this embodiment provides a welding structure 10, including a spherical crown 110 and a flange 120. Specifically, the spherical crown 110 includes a first joint surface 112, and the flange 120 includes a second joint surface 122. The second joint surface 122 is in contact with the first joint surface 112. Among them, the first joint surface 112 and the second joint surface 122 are connected by welding.

[0097] According to the welding structure 10 provided in this embodiment, it includes a spherical crown 110 and a flange 120. The spherical crown 110 includes a first joint surface 112, and the flange 120 includes a second joint surface 122. The spherical crown 110 and the flange 120 are overlapped by the contact between the first joint surface 112 and the second joint surface 122. The first joint surface 112 and the second joint surface 122 are connected by welding, thereby connecting the spherical crown 110 and the flange 120. Since the overlapping part of the spherical crown 110 and the flange 120 is surface contact, compared with corner overlap, it increases the contact area between the spherical crown 110 and the flange 120, thereby dispersing the stress at the overlapping part, increasing the connection strength, and reducing the possibility of weld cracking between the spherical crown 110 and the flange 120.

[0098] Furthermore, the spherical crown 110 is a hollow structure, including a connecting part and a joint part. The connecting part is located at one end of the spherical crown 110 and is connected to the mixing drum 200, thereby sealing the mixing drum 200. The joint part is located at the other end of the spherical crown 110 and has an outer surface and an inner surface for connecting to the flange 120. The flange 120 includes a welding section and a connecting section. The cross-sectional area of the welding section is larger than that of the connecting section. The welding section includes a first flange surface and a second flange surface. The first flange surface is located on the side away from the connecting section, and the second flange surface is located on the side close to the connecting section. The first flange surface or the second flange surface is used for connecting to the spherical crown 110.

[0099] As Figure 1 and Figure 4 shown, further, the first fitting surface 112 is located on the outer surface, and the second fitting surface 122 is located on the first flange surface. Or the first fitting surface 112 is located on the inner surface, and the second fitting surface 122 is located on the second flange surface. By fitting the outer surface of the fitting portion to the first flange surface of the flange 120, or inserting the flange 120 into the spherical crown 110 and fitting the second flange surface of the flange 120 to the inner surface of the fitting portion, the contact area between the spherical crown 110 and the flange 120 can be increased, thereby dispersing the stress at the lap joint and increasing the connection strength.

[0100] As Figure 3 shown, further, an annular weld 160 is provided between the first fitting surface 112 and the second fitting surface 122 for circumferential welding. Since the fitting edge between the first fitting surface 112 and the second fitting surface 122 is circular, the spherical crown 110 and the flange 120 can be connected by circumferential welding. Circumferential welding is beneficial to evenly disperse the stress and avoid the situation of excessive local stress, thereby further reducing the possibility of weld cracking between the spherical crown 110 and the flange 120.

[0101] Further, the annular weld 160 is located at the fitting edge of the first fitting surface 112 and the second fitting surface 122. When the first fitting surface 112 and the second fitting surface 122 are fitted, the fitting edge includes two circumferential seams, and circumferential welding is performed along the fitting edge of the first fitting surface 112 and the second fitting surface 122, increasing the diameter of the circumferential welding, thereby reducing the stress at the weld and avoiding stress concentration.

[0102] Further, a plug weld 170 is further included between the first fitting surface 112 and the second fitting surface 122, and the plug weld 170 is used for plug welding connection. By plug welding the first fitting surface 112 and the second fitting surface 122, the connection strength between the spherical crown 110 and the flange 120 can be enhanced.

[0103] Further, the plug weld 170 is located at the middle position of the first fitting surface 112. The plug weld 170 is used for plug welding. By performing plug welding connection between the first fitting surface 112 and the second fitting surface 122 through the plug weld 170, the connection strength between the spherical crown 110 and the flange 120 can be further enhanced. The plug weld is at the middle position and the circumferential weld is around. On the one hand, the strength is improved, and on the other hand, it is beneficial to evenly disperse the stress and reduce the situation where the stress is concentrated on one side.

[0104] Further, the welding structure 10 further includes a coiled pipe 130 and a reinforcing cone 140. The coiled pipe 130 is located on the side of the flange 120 close to the connecting portion and is connected to the flange 120. One end of the reinforcing cone 140 is connected to the spherical crown 110, and the other end is connected to the coiled pipe 130. By reinforcing the spherical crown 110 through the reinforcing cone 140, the reliability of the welding structure 10 is enhanced.

[0105] Further, the welding structure 10 further includes a spherical crown support plate 150. The spherical crown support plate 150 is located in the space enclosed by the coiled pipe 130, the reinforcing cone 140, and the spherical crown 110. One end of the spherical crown support plate 150 is connected to the coiled pipe 130, and the other end of the spherical crown support plate 150 is connected to the spherical crown 110. By connecting the coiled pipe 130 and the spherical crown 110 through the spherical crown support plate 150, the strength of the spherical crown 110 is enhanced, and the reliability of the welding structure 10 is improved.

[0106] Embodiment 10:

[0107] As Figure 5 shown, a concrete mixer truck 20 according to an embodiment of the present application includes a mixing drum 200 and the welding structure 10 of any of the above embodiments. The welding structure 10 is connected to the mixing drum 200.

[0108] The concrete mixer truck 20 provided according to the embodiment of the present application includes a mixing drum 200 and the welding structure 10 of any of the above embodiments of the present application. Therefore, it has all the beneficial effects of the welding structure 10 of any of the above embodiments, which will not be elaborated herein. The welding structure 10 is connected to the mixing drum 200 for sealing the mixing drum 200.

[0109] Embodiment 11:

[0110] As Figure 6 shown, the present embodiment provides a welding process for the welding structure of any of the above embodiments of the present application, including the following steps:

[0111] Step S202: The first fitting surface on the spherical crown and the second fitting surface on the flange are fitted together;

[0112] Step S204: Circular seam welding is performed through the circular seam at the fitting edge of the first fitting surface and the second fitting surface;

[0113] Step S206: Plug welding is performed on the spherical crown and the flange through the opening in the middle of the first fitting surface.

[0114] According to the welding process provided by the embodiment of the present application, first, the first fitting surface on the spherical crown and the second fitting surface on the flange are fitted together, then circular seam welding is performed through the circular seam at the fitting edge of the first fitting surface and the second fitting surface, and finally, plug welding is performed on the spherical crown and the flange through the opening in the middle of the first fitting surface. The lap joint form between the spherical crown and the flange is changed from corner lap to surface lap, increasing the contact area and plug welding holes, thereby increasing the connection strength. By performing circular seam welding through the circular seam at the fitting edge of the first fitting surface and the second fitting surface, the diameter of the circular weld is increased, the stress at the weld is reduced, and the over-concentration of stress is avoided.

[0115] Embodiment 12:

[0116] As Figures 1 to 4 shown, this specific embodiment provides a concrete mixer truck 20, including a mixing drum 200 and a welding structure 10. The welding structure 10 includes a spherical crown 110, a flange 120, a coiled pipe 130, a reinforcing cone 140, and a spherical crown support plate 150.

[0117] As Figure 1 and Figure 3 shown, the welding lap joint between the flange 120 and the spherical crown 110 is changed to a surface lap joint. Circumferential welding can be performed on both the inner and outer edges of the lap joint, and plug welding can be performed by drilling holes in the spherical crown 110 in the middle of the lap surface, which can further strengthen this area.

[0118] Cracking failures have occurred at the weld between the spherical crown 110 and the flange 120. Now, two optimization schemes are designed to improve it. It is necessary to verify the effects of the optimization schemes, conduct static strength analysis under dynamic load, steering, and braking conditions, verify the optimization effect of the welding structure 10, and provide a reference for the structural design of the spherical crown 110.

[0119] In the first solution, the first fitting surface 112 is located on the inner surface, and the second fitting surface 122 is located on the second flange surface. In the second solution, the first fitting surface 112 is located on the outer surface, and the second fitting surface 122 is located on the first flange surface.

[0120]

[0121] Through simulation analysis of the structure before optimization, the first solution, and the second solution, under dynamic load, steering, and braking conditions, the stresses at the weld between the spherical crown and the flange of several solutions are all lower than the material yield limit of 345 Mpa, meeting the strength requirements. Comparing several solutions, the second solution has the best optimization effect. Under the braking condition, compared with the initial solution, the maximum stress at the weld between the spherical crown and the flange in the second solution is reduced by 24% from 237 Mpa. The second solution is preferred.

[0122] In summary, the beneficial effects of the embodiments of this application are as follows:

[0123] 1. The lap joint form between the spherical crown 110 and the flange 120 is changed from an angle lap joint to a surface lap joint, increasing the contact surface and plug welding holes, thereby increasing the connection strength.

[0124] 2. This welding structure 10 increases the diameter of the outer circumferential weld, reduces the stress at the weld, and avoids excessive stress concentration.

[0125] In this application, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "plural" means two or more, unless otherwise clearly defined. Terms such as "installed", "connected", "joined", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "joined" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0126] In the description of this application, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to this application.

[0127] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0128] The above are only the preferred embodiments of this application and are not used to limit this application. For those skilled in the art, this application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

1. A welding structure, characterized in that, Comprising: A spherical crown (110), the spherical crown (110) comprising a first fitting surface (112); A flange (120), the flange (120) comprising a second fitting surface (122), the second fitting surface (122) being in contact with the first fitting surface (112); Wherein, the first fitting surface (112) and the second fitting surface (122) are connected by welding; The spherical crown (110) is a hollow structure, the spherical crown (110) comprising a connecting portion and a fitting portion, the connecting portion and the fitting portion being located at opposite ends of the spherical crown (110) respectively, the fitting portion having an outer surface and an inner surface, the connecting portion being used for connecting the mixing drum (200); The flange (120) comprises a welding section and a connecting section, the cross-sectional area of the welding section being larger than that of the connecting section, the welding section comprising a first flange surface and a second flange surface, the first flange surface being located on the side away from the connecting section, and the second flange surface being located on the side close to the connecting section; The first fitting surface (112) is located on the outer surface; The second fitting surface (122) is located on the first flange surface; or The first fitting surface (112) is located on the inner surface; The second fitting surface (122) is located on the second flange surface; An annular weld (160) is provided between the first fitting surface (112) and the second fitting surface (122); The annular weld (160) is located at the fitting edge of the first fitting surface (112) and the second fitting surface (122). When the first fitting surface (112) and the second fitting surface (122) are in contact, the fitting edge comprises two annular seams, and circumferential welding is performed along the fitting edge; A plug weld seam (170) is further included between the first fitting surface (112) and the second fitting surface (122); The plug weld seam (170) is located at the middle position of the first fitting surface (112).

2. The welding structure according to claim 1, wherein, The welding structure further comprises: A coiled pipe (130), located on the side of the flange (120) close to the connecting portion and connected to the flange (120); A reinforcing cone (140), the reinforcing cone (140) connecting the spherical crown (110) and the coiled pipe (130).

3. The welding structure according to claim 2, characterized in that, The welding structure further comprises: A spherical crown support plate (150), located in the space enclosed by the coiled pipe (130), the reinforcing cone (140) and the spherical crown (110), one end of the spherical crown support plate (150) being connected to the coiled pipe (130), and the other end of the spherical crown support plate (150) being connected to the spherical crown (110).

4. A concrete mixer truck, characterized in that, Comprising: A mixing drum (200); The welding structure according to any one of claims 1 to 3, connected to the mixing drum (200).

5. A welding process for the welding structure according to any one of claims 1 to 3, characterized in that Comprising: The first fitting surface on the spherical crown and the second fitting surface on the flange are in contact; Circumferential welding is performed through the annular seam at the fitting edge of the first fitting surface and the second fitting surface; Plug welding is performed on the spherical crown and the flange through the opening in the middle of the first fitting surface.

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