Welding method and welding device for parts at bottom of tank body

Abstract

The invention provides a tank bottom part welding method and device. The tank bottom part welding method comprises the steps that S1, an end socket is inversely buckled on a horizontal platform; s2, a frame is arranged, a part to be welded is detachably installed at the designated position of the frame, and then the frame is buckled on the platform and covers the outer portion of the end socket; s4, the frame is adjusted, the center of the frame is made to coincide with the center of the end socket, and the welding face of the part to be welded makes contact with the end socket; s5, by means of a spot welding mode, a part to be welded is spot-welded to the end socket, and then formal welding operation is started; and S6, after all the parts are welded and cooled, connection between the parts and the frame is removed, then the frame is taken down, and welding work is completed. When part welding is carried out on the end socket, leveling can be rapidly carried out, errors are relatively small, deflection is not prone to being generated after welding, and continuous, efficient and standardized production can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of tank bottom component welding, and in particular to a tank bottom component welding method and a tank bottom component welding device. Background Art

[0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] For the tank body (such as liquid nitrogen tank, compressed gas tank, gas tank, etc.), the bottom is usually provided with a hemispherical head. The bottom of some tank bodies needs to be welded with a universal wheel fixing plate and a retaining ring fixing plate on the head. The bottom end face of the universal wheel fixing plate needs to be kept horizontal after welding, and the retaining ring fixing plate also needs to maintain an angle of 45° with the universal wheel fixing plate.

[0004] At present, when welding the fixed plate, the method of drawing lines on the head is often used to determine the welding position. However, because the arc surface shape of the head is not particularly standard, the measurement error is large, which brings great uncertainty to the subsequent installation and positioning work; in addition, the fixed plate is usually leveled with a spirit level, which requires multiple adjustments and has a low efficiency in leveling; and, in traditional welding methods, welding shrinkage will inevitably occur at the weld. This shrinkage force can easily destroy the previously determined horizontal state, and then cause the fixed plate to tilt, seriously affecting the quality and structural stability of the product; and from the perspective of production efficiency and standardization, the current methods of measuring, drawing lines and leveling are very inefficient, and the consistency between products in the same batch is poor, which is not conducive to the standardized production of batch products. Summary of the invention

[0005] The main purpose of the present invention is to provide a tank bottom parts welding method and welding device that can quickly find the level with relatively small error, is not prone to skew after welding, and can be produced continuously, efficiently and in a standardized manner.

[0006] To achieve the above object, the technical solution of the present invention is implemented as follows: a tank bottom parts welding method, comprising:

[0007] S1. Place the head upside down on a horizontal platform;

[0008] S2. Set up a frame, detachably install the parts to be welded at the designated positions of the frame, then buckle the frame on the platform and cover the outside of the head;

[0009] S4. Adjust the frame so that the center of the frame coincides with the center of the head, and the welding surface of the component to be welded contacts the head;

[0010] S5. Spot weld the parts to be welded on the head by spot welding, and then start the formal welding operation;

[0011] S6. After all parts are welded and cooled, release the connection between the parts and the frame, then remove the frame to complete the welding work.

[0012] Furthermore, a cross-shaped slide rail is provided on the frame, and support feet are slidably provided on the four ends of the cross-shaped slide rail, respectively, and each support foot can slide back and forth between each end of the cross-shaped slide rail and the middle of the cross-shaped slide rail, and a scale is provided on the cross-shaped slide rail along the sliding direction of the support foot, which is used to mark the distance between the corresponding support foot and the center of the cross-shaped slide rail;

[0013] In S4, when “making the center of the frame coincide with the center of the head”, the following method is adopted:

[0014] Adjust the distances from each support foot to the center of the cross-shaped slide rail to be equal, so that each support foot is stuck on the outside of the head and each support foot is in contact with the outer surface of the head.

[0015] Furthermore, one end of each supporting foot is used to contact the platform to control the distance between the frame and the platform; a sliding seat is correspondingly provided at the position of each supporting foot on the cross-shaped slide rail, and the supporting foot is slidably provided on the cross-shaped slide rail through the sliding seat; wherein the supporting foot is detachably connected to the sliding seat, or the supporting foot is height-adjustably connected to the sliding seat;

[0016] In S4, the “making the welding surface of the component to be welded contact with the head” is carried out in the following manner:

[0017] Select a support foot of appropriate height to connect with the sliding seat, or adjust the height of the support foot until the welding surface of the component to be welded contacts the head.

[0018] A tank bottom parts welding device is used in conjunction with the above-mentioned tank bottom parts welding method, comprising a frame, a cross-shaped slide rail, a support leg and a sliding seat, and also comprising a first positioning seat. Four of the first positioning seats are provided, distributed on the four ends of the cross-shaped slide rail, and slidably cooperate with the cross-shaped slide rail to provide a mounting base for the parts to be welded.

[0019] Furthermore, a second sliding groove is vertically opened on the supporting foot, and a second sliding block extending into the second sliding groove is provided on one side of the sliding seat corresponding to the second sliding groove, and a second bolt is passed through the first positioning seat, and the second bolt passes through the first positioning seat and cooperates with the second sliding block thread. Tightening the second bolt can make the second sliding block move toward the direction of the first positioning seat, and cooperate with the first positioning seat to clamp the second sliding groove on the supporting foot, thereby fixing the first positioning seat at the corresponding position of the supporting foot.

[0020] Furthermore, the frame is rectangular, the cross-shaped slide rail coincides with the diagonal of the rectangular frame, scales are respectively provided on the four sides of the rectangular frame, and second positioning seats are slidably provided on the four sides of the rectangular frame, and the second positioning seats provide a mounting base for the parts to be welded.

[0021] The beneficial effects of the present invention are embodied in:

[0022] The present invention, by buckling the head upside down on a horizontal platform, and then buckling the frame on the platform, the frame is supported by the horizontal platform, so the frame will also be horizontal, and the parts to be welded on the frame are also horizontal, achieving the effect of rapid leveling; since the relative positions of the parts to be welded and the frame are determined, it is only necessary to determine the relative positions of each part and the frame in the early stage, and then the welding can be started directly after the frame and the head are aligned, eliminating the process of measuring and drawing lines; and during the welding process, when shrinkage occurs at the weld, the frame will give the parts a counteracting force to avoid skew caused by the shrinkage force. In this way, the present invention achieves rapid leveling with relatively small errors, is not easy to skew after welding, and can achieve continuous, efficient and standardized production. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In the attached picture:

[0024] Figure 1 A three-dimensional diagram of the tank bottom parts welding device of the present invention;

[0025] Figure 2 for Figure 1 Magnified view at A in the middle.

[0026] Description of reference numerals:

[0027] 1. Frame; 11. Third slide groove; 2. Cross-shaped slide rail; 21. Scale; 22. First slide groove; 3. Support foot; 31. Second slide groove; 4. Sliding seat; 5. First positioning seat; 6. Second positioning seat. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are only part of the embodiments of the invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the invention.

[0029] See also Figure 1 to Figure 2 .

[0030] The invention discloses a tank bottom parts welding method, comprising:

[0031] S1. Place the head upside down on a horizontal platform;

[0032] S2, setting a frame 1, detachably mounting the parts to be welded at the designated positions of the frame 1, and then buckling the frame 1 on the platform and covering the outside of the head;

[0033] S4, adjust the frame 1 so that the center of the frame 1 coincides with the center of the head, so that the welding surface of the component to be welded contacts the head;

[0034] S5. Spot weld the parts to be welded on the head by spot welding, and then start the formal welding operation;

[0035] S6. After all parts are welded and cooled, the connection between the parts and the frame 1 is released, and then the frame 1 is removed to complete the welding work.

[0036] The present invention, by buckling the head upside down on a horizontal platform, and then buckling the frame 1 on the platform, the horizontal platform supports the frame 1, so the frame 1 will also be horizontal, and because the parts to be welded are installed on the frame 1, the parts to be welded are also horizontal, achieving the effect of rapid leveling; because the welding starts after the frame 1 and the head are aligned, and the relative positions of the parts to be welded and the frame 1 are determined, in this way, as long as the positions of each part are determined in the early stage, the welding can be started directly after the frame 1 and the head are aligned, eliminating the process of measuring and drawing lines; because during the welding process, the parts to be welded are installed on the frame 1 throughout the process, so when shrinkage occurs at the weld, the frame 1 will give the parts a counteracting force to avoid skew caused by the shrinkage force. In this way, the present invention achieves rapid leveling with relatively small errors, and it is not easy to produce skew after welding, and can be continuously, efficiently and standardized.

[0037] Preferably, the head cover which is inverted on the horizontal platform is fixed on the platform. There are many specific fixing methods, such as pressing, clamping and other methods, and these methods are all common methods for fixing components on the platform in the prior art, so there is no need to elaborate here.

[0038] In one embodiment, a cross-shaped slide rail 2 is provided on the frame 1, and support feet 3 are slidably provided on the four ends of the cross-shaped slide rail 2, respectively. Each support foot 3 can slide back and forth between each end of the cross-shaped slide rail 2 and the middle of the cross-shaped slide rail 2. A scale 21 is provided on the cross-shaped slide rail 2 along the sliding direction of the support foot 3, which is used to mark the distance between the corresponding support foot 3 and the center of the cross-shaped slide rail 2;

[0039] In S4, when “adjusting the frame 1 so that the center of the frame 1 coincides with the center of the end cap”, the following method is adopted:

[0040] The distances between each supporting foot 3 and the center of the cross-shaped slide rail 2 are adjusted to be equal, so that each supporting foot 3 is clamped on the outside of the end cover and each supporting foot 3 is in contact with the outer surface of the end cover.

[0041] In one embodiment, one end of each supporting foot 3 is used to contact the platform to control the distance between the frame 1 and the platform; a sliding seat 4 is correspondingly provided at the position of each supporting foot 3 on the cross-shaped slide rail 2, and the supporting foot 3 is slidably provided on the cross-shaped slide rail 2 through the sliding seat 4; wherein the supporting foot 3 is detachably connected to the sliding seat 4, or the supporting foot 3 is height-adjustably connected to the sliding seat 4;

[0042] In S4, when “adjusting the frame 1 so that the welding surface of the component to be welded contacts the head”, the following method is adopted:

[0043] Select a support foot 3 of appropriate height to connect with the sliding seat 4, or adjust the height of the support foot 3 until the welding surface of the component to be welded contacts with the head.

[0044] The present invention also discloses a tank bottom parts welding device, which is used in conjunction with the above-mentioned welding method, and includes the above-mentioned frame 1, cross-shaped slide rail 2, support legs 3 and sliding seat 4, and also includes a first positioning seat 5. The first positioning seat 5 is provided with four, distributed on the four ends of the cross-shaped slide rail 2, and slidably cooperates with the cross-shaped slide rail 2 to provide a mounting base for the parts to be welded.

[0045] In a specific implementation, the first positioning seat 5 slides on the cross-shaped slide rail 2 to a specified position, so that it can be adapted to heads of various specifications, thereby improving applicability.

[0046] Preferably, the cross-shaped slide rail 2 has a first slide groove 22, the bottom of the first positioning seat 5 has a first slider extending into the first slide groove 22, the first positioning seat 5 is penetrated by a first bolt, the first bolt passes through the first positioning seat 5 and is threadedly engaged with the first slider, and tightening the first bolt can make the first slider move toward the first positioning seat 5, and cooperate with the first positioning seat 5 to clamp the first slide groove 22 on the cross-shaped slide rail 2, thereby fixing the first positioning seat 5 at the corresponding position of the cross-shaped slide rail 2. Since this positioning method is common knowledge of those skilled in the art, it will not be described in detail here.

[0047] In one embodiment, the support foot 3 is vertically provided with a second slide groove 31, and the sliding seat 4 is provided with a second slider extending into the second slide groove 31 on one side corresponding to the second slide groove 31, and the first positioning seat 5 is penetrated with a second bolt, and the second bolt passes through the first positioning seat 5 and is threadedly engaged with the second slider. By tightening the second bolt, the second slider can be moved toward the first positioning seat 5, and cooperate with the first positioning seat 5 to clamp the second slide groove 31 on the support foot 3, thereby fixing the first positioning seat 5 at the corresponding position of the support foot 3. With this design, the overall height of the support foot 3 can be adjusted by sliding the second slide groove 31 and the first positioning seat 5, so that the welding surface of the component to be welded is in contact with the head, and it can be adapted to heads of various specifications to improve applicability.

[0048] In one embodiment, the frame 1 is rectangular, the cross-shaped slide rail 2 coincides with the diagonal of the rectangular frame 1, and scales 21 are respectively provided on the four sides of the rectangular frame 1. Second positioning seats 6 are respectively slidably provided on the four sides of the rectangular frame 1, and the second positioning seats 6 provide a mounting base for the parts to be welded.

[0049] In the specific implementation, the second positioning seat 6 slides to the specified position on the four sides of the rectangular frame 1, which can be adapted to various heads of different specifications to improve applicability. Specifically, during welding, the universal wheel fixing plate to be welded is installed on the first positioning seat 5, and the retaining ring fixing plate to be welded is installed on the second positioning seat 6. After debugging is completed, welding can be carried out.

[0050] Preferably, the rectangular frame 1 has a third slide groove 11, the bottom of the second positioning seat 6 has a third slider extending into the third slide groove 11, and the second positioning seat 6 is provided with a third bolt, which passes through the second positioning seat 6 and is threadedly engaged with the third slider. By tightening the third bolt, the third slider can be moved toward the second positioning seat 6, and the third slider can be engaged with the second positioning seat 6 to clamp the third slide groove 11 on the rectangular frame 1, thereby fixing the second positioning seat 6 at the corresponding position of the rectangular frame 1. Since this positioning method is common knowledge to those skilled in the art, it will not be described in detail here.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0052] It should be noted that if the embodiments of the invention involve directional indications (such as up and down), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0053] In addition, the meaning of "and / or" appearing in the full text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, "multiple" means more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the invention.

Claims

1. A tank bottom parts welding method, characterized in that: include: S1. Place the head upside down on a horizontal platform; S2. A frame (1) is provided, and the parts to be welded are detachably mounted at designated positions of the frame (1), and then the frame (1) is buckled onto the platform and covered on the outside of the head; S4, adjusting the frame (1) so that the center of the frame (1) coincides with the center of the end cap, and the welding surface of the component to be welded contacts the end cap; S5. Spot weld the parts to be welded on the head by spot welding, and then start the formal welding operation; S6. After all parts are welded and cooled, the connection between the parts and the frame (1) is released, and then the frame (1) is removed to complete the welding work.

2. The tank bottom parts welding method according to claim 1, characterized in that: The frame (1) is provided with a cross-shaped slide rail (2), and support feet (3) are slidably provided on the four ends of the cross-shaped slide rail (2), and each support foot (3) can slide back and forth between each end of the cross-shaped slide rail (2) and the middle of the cross-shaped slide rail (2), and a scale (21) is provided on the cross-shaped slide rail (2) along the sliding direction of the support foot (3) for marking the distance between the corresponding support foot (3) and the center of the cross-shaped slide rail (2); In S4, when "making the center of the frame (1) coincide with the center of the end cap", the following method is adopted: The distances from each supporting foot (3) to the center of the cross-shaped slide rail (2) are adjusted to be equal, so that each supporting foot (3) is clamped on the outside of the end cap and each supporting foot (3) is in contact with the outer surface of the end cap.

3. The tank bottom parts welding method according to claim 2, characterized in that: One end of each supporting foot (3) is used to contact the platform to control the distance between the frame (1) and the platform; a sliding seat (4) is correspondingly arranged at the position of each supporting foot (3) on the cross-shaped slide rail (2), and the supporting foot (3) is slidably arranged on the cross-shaped slide rail (2) through the sliding seat (4); wherein the supporting foot (3) is detachably connected to the sliding seat (4), or the supporting foot (3) is height-adjustably connected to the sliding seat (4); In S4, the "making the welding surface of the component to be welded contact with the head" is carried out in the following manner: A support foot (3) of suitable height is selected to connect with the sliding seat (4), or the height of the support foot (3) is adjusted until the welding surface of the component to be welded contacts the head.

4. A tank bottom parts welding device, characterized in that: The method for welding the bottom parts of a tank body according to any one of claims 1 to 3 comprises a frame (1), a cross-shaped slide rail (2), a support leg (3) and a sliding seat (4), and also comprises a first positioning seat (5). Four first positioning seats (5) are provided, which are distributed on the four ends of the cross-shaped slide rail (2) and are slidably matched with the cross-shaped slide rail (2) to provide a mounting base for the parts to be welded.

5. The tank bottom parts welding device according to claim 4, characterized in that: The supporting foot (3) is vertically provided with a second slide groove (31); a second sliding block extending into the second slide groove (31) is provided on one side of the sliding seat (4) corresponding to the second slide groove (31); a second bolt is passed through the first positioning seat (5); the second bolt passes through the first positioning seat (5) and is threadedly engaged with the second sliding block; by tightening the second bolt, the second sliding block can be moved toward the first positioning seat (5) and cooperate with the first positioning seat (5) to clamp the second slide groove (31) on the supporting foot (3), thereby fixing the first positioning seat (5) at the corresponding position of the supporting foot (3).

6. The tank bottom parts welding device according to claim 4, characterized in that: The frame (1) is rectangular, the cross-shaped slide rail (2) coincides with the diagonal of the rectangular frame (1), scales (21) are respectively provided on the four sides of the rectangular frame (1), and second positioning seats (6) are respectively slidably provided on the four sides of the rectangular frame (1), and the second positioning seats (6) provide a mounting base for the parts to be welded.

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