A structure for controlling welding deformation of CB2 material cylinder blocks

Abstract

This utility model discloses a structure for controlling the welding deformation of CB2 material cylinder bodies, belonging to the field of high-pressure cylinder body welding technology. It includes two half-cylinders that cooperate to form a cylinder body, with the mid-section of the cylinder body serving as the mating surface between the two half-cylinders. Two half-rings cooperate to form an inner ring, with the half-rings located on the inner wall of the half-cylinders. One side of the half-ring is fixedly connected to the half-cylinder and together they form an air passage. Two positioning blocks are respectively fixed at the two mid-sections of the half-cylinders. The positioning blocks have protrusions on their surfaces facing the air passage, and these protrusions are fixedly connected to one end of the half-ring. Several dimensional support plates are embedded between the half-ring and the half-cylinder on the side not fixedly connected to it. This utility model, by setting positioning blocks, facilitates the hoisting of the half-rings and improves assembly efficiency. The dimensional support plates reduce the tendency for free deformation under welding stress, ensuring that the critical dimensions of the air passage are within acceptable limits. The cooperation between the positioning blocks and the dimensional support plates prevents the half-rings from sliding, reducing safety risks and improving workers' working conditions.

Description

Technical Field

[0001] This utility model relates to the field of high-pressure cylinder welding technology, specifically to a structure for controlling the welding deformation of CB2 material cylinders. Background Technology

[0002] CB2 material is a heat-resistant stainless steel material, mainly used in high-temperature and high-pressure components, such as high-pressure cylinder blocks and medium-pressure cylinder blocks. Its operating temperature can reach up to 620℃, and it has excellent creep rupture strength and oxidation resistance.

[0003] like Figure 1 As shown, existing high-pressure cylinders have a ring of air passages in their inner cavity. Due to limitations in casting space, processing, and high requirements for the surface quality of the air passages, the air passages are formed by welding a semi-ring and a casting structure. The size of the air passage volume affects the pressure distribution inside the high-pressure cylinder. Specifically, if the air passage is too small, it may lead to excessively high local pressure, increasing the risk of system leakage; if the air passage is too large, it will cause uneven pressure distribution, weaken the structural strength of the cylinder, increase the risk of cracking or deformation, and affect the stability and reliability of the system.

[0004] During the production of high-pressure cylinders, the shape and weight of the semi-rings exceed the manual operation capabilities and safety limits. Worker safety, the convenience and accuracy of welding assembly, and the quantity and function of tooling all need to be comprehensively considered.

[0005] Therefore, developing a structure that can improve the assembly efficiency of the semi-ring and cylinder body, ensure the accuracy of tooling dimensions at key locations, reduce safety risks, and improve the working conditions of workers is an urgent problem to be solved at this stage. Summary of the Invention

[0006] To address the problems existing in the prior art, this utility model provides a structure for controlling the welding deformation of CB2 material cylinder bodies. A positioning block is set at the split surface of the half-cylinder to facilitate the hoisting of the half-ring and improve the assembly efficiency of the half-ring and half-cylinder. The use of a size support plate can effectively reduce the tendency of free deformation under welding stress, ensuring that the key dimensions of the air passage are controlled within the qualified range during the welding process, reducing rework. Furthermore, the cooperation between the positioning block and the size support plate can also prevent the half-ring from sliding, reduce safety risks, and improve the working conditions of workers.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] This utility model provides a structure for controlling the welding deformation of CB2 material cylinder blocks, including:

[0009] A half-cylinder, two half-cylinders cooperate to form a cylinder body, and the mid-section of the cylinder body is the mating surface between the two half-cylinders;

[0010] A semi-ring, two of which cooperate to form an inner ring, the semi-ring being disposed on the inner wall surface of the half-cylinder, one side of the semi-ring being fixedly connected to the half-cylinder, the semi-ring and the half-cylinder together forming an air passage;

[0011] Two positioning blocks are fixed at the two split surfaces of the half cylinder, and the surface of the positioning block facing the air passage is provided with a boss, which is fixedly connected to one end of the half ring.

[0012] Several support plates of various sizes are embedded between the side of the semi-ring that is not fixedly connected to the semi-cylinder and the semi-cylinder.

[0013] As a preferred technical solution, the size of the size support plate matches the lower difference between the size of the airway;

[0014] And / or, the size support plate is snapped between the semi-ring and the semi-cylinder;

[0015] And / or, several of the said size support plates are evenly distributed along the circumference of the cylinder body.

[0016] As a preferred technical solution, the side of the semi-ring that is not fixedly connected to the semi-cylinder is provided with several tie rods between it and the semi-cylinder.

[0017] As a preferred technical solution, the split surface of the half cylinder has a machining allowance, the two half rings are formed by dividing the inner ring along the diameter direction, and the protrusion height of the boss matches the machining allowance.

[0018] As a preferred technical solution, the positioning block passes through the air passage, and the overlap distance between one end of the positioning block and the mid-section surface is set to 30-50mm.

[0019] As a preferred technical solution, the positioning block has a square cross-section, and the cross-sectional area of ​​the positioning block is not less than 900 mm². 2 ;

[0020] And / or, the protrusion height of the positioning block relative to the dividing surface is set to 30-45mm;

[0021] And / or, the positioning block is made of carbon steel.

[0022] As a preferred technical solution, the half-cylinder and / or the half-ring are made of CB2 material.

[0023] As a preferred technical solution, the two positioning blocks are welded to both ends of the semi-ring, respectively.

[0024] As a preferred technical solution, the two ends of the positioning block are lap-welded to the mid-section.

[0025] As a preferred technical solution, one side of the semi-ring is first spot-welded to the inner wall of the semi-cylinder before being assembled by welding.

[0026] The beneficial effects of this utility model are as follows:

[0027] 1. This utility model, by setting the positioning block at the midpoint of the half-cylinder, can accurately fix the half-cylinder and the half-ring, facilitating the hoisting of the half-ring and improving the assembly efficiency of the half-ring and the half-cylinder; the size support plate is embedded between the half-cylinder and the half-ring, which can effectively reduce the tendency of free deformation of welding stress, ensure that the key dimensions of the air passage are controlled within the qualified range during the welding process, and reduce rework; in addition, the cooperation between the positioning block and the size support plate can also prevent the half-ring from sliding, reduce safety risks, and improve the working conditions of workers.

[0028] 2. The size of the air passage in the cylinder is one of the key factors to ensure the efficient, safe and reliable operation of the system. This utility model can ensure that the key dimensions of the air passage are accurate and qualified, which can ensure the smooth flow of fluid in the system, reduce resistance loss, improve system efficiency, maintain stable performance, reduce failure rate and increase service life. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the structure for controlling the welding deformation of a CB2 material cylinder block according to the present invention;

[0030] Figure 2 To be Figure 1 A schematic diagram of the structure after the half-cylinder is erected;

[0031] Figure 3 for Figure 2 A schematic diagram of the positioning block in the diagram;

[0032] Figure 4 for Figure 1 A structural diagram of a portion of the area;

[0033] Figure 5 for Figure 4 A schematic diagram of the structure of the support plate in the middle;

[0034] Figure 6 for Figure 1 Schematic diagram of the structure after the tie rods are installed.

[0035] In the diagram: 1-half cylinder, 11-center split surface, 2-half ring, 3-air passage, 4-positioning block, 41-boss, 5-size support plate, 6-rib. Detailed Implementation

[0036] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0037] Please refer to Figures 1-6 The present invention provides a structure for controlling the welding deformation of a CB2 material cylinder body, comprising a half cylinder 1, a half ring 2, two positioning blocks 4 and several support plates 5 of various sizes; wherein, the half cylinder 1 is in the shape of a semi-circular ring, and the two half cylinders 1 can be fitted together to form a cylinder body, and the dividing surface 11 of the cylinder body is the mating surface between the two half cylinders 1.

[0038] The inner ring of the whole circle is divided into two halves, namely two semi-circular rings 2. The shape of the semi-circular ring 2 matches that of the half cylinder 1. The semi-circular ring 2 is set on the inner wall surface of the half cylinder 1. One side of the semi-circular ring 2 is fixedly connected to the half cylinder 1. The semi-circular ring 2 and the half cylinder 1 together form the air passage 3.

[0039] Two positioning blocks 4 are fixed at the two mid-sections 11 of the half cylinder 1 respectively. The surface of the positioning block 4 facing the air passage 3 is provided with a boss 41. The boss 41 is fixedly connected to one end of the half ring 2. The positioning block 4 fixes the half cylinder 1 and the half ring 2, which facilitates the hoisting of the half ring 2 and improves the assembly efficiency of the half ring 2 and the half cylinder 1.

[0040] Several support plates 5 of various sizes are embedded between the half ring 2 and the half cylinder 1 on the side that is not fixedly connected to the half cylinder 1, which effectively reduces the tendency of free deformation of welding stress and ensures that the key dimensions of the air passage 3 are controlled within the qualified range during the welding process, thereby reducing rework.

[0041] For any further explanation, please refer to [link / reference]. Figure 2 Since the cylinder body needs to meet the machining allowance, the split surface 11 of the half cylinder 1 has a machining allowance, while the two half rings 2 are directly divided by the inner ring along the diameter direction. The two ends of the half ring 2 have no machining allowance. Therefore, the machining allowance makes the half ring 2 and the half cylinder 1 form a height difference a after they are assembled. Based on this height difference a, the protrusion height of the boss 41 is matched with the machining allowance to ensure that the assembly position of the half ring 2 and the half cylinder 1 is accurate.

[0042] Specifically, the half-cylinder 1 and / or the half-ring 2 are preferably made of CB2 material.

[0043] In this embodiment, please refer to Figure 1 , Figure 2 , Figure 4 and Figure 6 Two positioning blocks 4 pass through the two ends of the air passage 3 respectively. The overlap distance b between one end of the positioning block 4 and the middle parting surface 11 is set to 30-50mm. Both ends of the positioning block 4 are overlapped and welded to the middle parting surface 11. Fixing the half ring 2 and the half cylinder 1 to prevent them from shaking facilitates subsequent welding.

[0044] Specifically, from the perspective of structural stability, the cross-section of the positioning block 4 is preferably square, and the cross-sectional area of ​​the positioning block 4 is not less than 900 mm². 2 Meanwhile, the protrusion height of the positioning block 4 relative to the split surface 11 is set to 30-45mm;

[0045] Furthermore, considering both economic efficiency and hoisting safety, the preferred material for positioning block 4 is carbon steel, specifically Q235B.

[0046] In this embodiment, please refer to Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 After the half-ring 2 and half-cylinder 1 are welded together, the side of the half-ring 2 that is not welded to the half-cylinder 1 is an important structure for forming the air passage 3 (the contact support surfaces of the half-ring 2 and half-cylinder 1 with the size support plate 5 are the flow distribution surfaces of the air passage 3). This position determines the shape of the air passage 3 and is a key dimension that needs to be guaranteed during the welding process. Furthermore, since the deformation trend of the structural weld is to shrink towards the weld, the key dimension of the air passage 3 becomes larger after welding than before welding. Therefore, the size support plate 5 is snapped between the half-ring 2 and half-cylinder 1, and the dimension c of the part on the size support plate 5 used for calibration matches the lower difference of the key dimension of the air passage 3.

[0047] Further, please refer to Figure 1 and Figure 6 Several support plates 5 of various sizes should be evenly distributed along the circumference of the cylinder body to effectively ensure that the key dimensions of the air passage 3 meet the standards.

[0048] In this embodiment, please refer to Figure 6 After the semi-ring 2 and the semi-cylinder 1 are spot welded together, five tie rods 6 are welded between the semi-ring 2 and the semi-cylinder 1 on the side where the semi-ring 2 is not fixedly connected to the semi-cylinder 1. The tie rods 6 are located on the non-welded side and will not affect the normal welding, and can effectively prevent the stress shrinkage of the weld. In other embodiments, the number of tie rods 6 can also be other values, as long as they can effectively prevent the stress shrinkage of the weld.

[0049] Please refer to Figures 1-6 The specific implementation process of this utility model is as follows:

[0050] Weld the two positioning blocks 4 to the two ends of the half ring 2 into a whole, place the half ring 2 on the inner wall of the half cylinder 1, and make the two ends of the positioning blocks 4 overlap the middle parting surface 11 on both sides of the air passage 3.

[0051] The two ends of the positioning block 4 are lap-welded to the split surface 11 to fix the half ring 2 and the half cylinder 1.

[0052] One side of the semi-ring 2 is spot welded to the inner wall of the semi-cylinder 1.

[0053] Several support plates 5 of different sizes are embedded between the side of the semi-ring 2 that is not fixedly connected to the semi-cylinder 1 and the semi-cylinder 1 to ensure that the key dimensions of the air passage 3 are within the tolerance range.

[0054] Erect and fix half cylinder 1, adjust the welding position between half ring 2 and half cylinder 1 to horizontal welding, and weld half ring 2 and half cylinder 1 by straight-in welding, which can reduce welding heat input and welding stress; at the same time, the weight of the size support plate 5 and half ring 2 can resist the upward shrinkage stress of the structural weld.

[0055] Remove the positioning block 4 and the size support plate 5.

[0056] It should be noted that, in order to avoid the welding stress affecting the critical dimensions of the gas passage 3, the positioning block 4 and the dimension support plate 5 should not be removed before the stress is relieved after welding. The positioning block 4 and the dimension support plate 5 should be removed after the stress is relieved in the furnace after welding, and then the dimension support plate 5 should be used to inspect the critical dimensions of the gas passage 3 to ensure that the dimensions of the gas passage 3 are qualified.

[0057] Furthermore, once both half-cylinders 1 are machined, they can be welded together to form a high-pressure cylinder body.

[0058] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A structure for controlling the welding distortion of a CB2 material cylinder, characterized by, include: Half cylinder (1), two half cylinders (1) cooperate to form a cylinder body, the middle split surface (11) of the cylinder body is the mating surface between the two half cylinders (1); Half ring (2), two half rings (2) cooperate to form an inner ring, the half ring (2) is located on the inner wall surface of the half cylinder (1), one side of the half ring (2) is fixedly connected to the half cylinder (1), the half ring (2) and the half cylinder (1) together form an air passage (3). Two positioning blocks (4) are fixed at the two mid-sections (11) of the half cylinder (1). The positioning blocks (4) have protrusions (41) on the surface facing the air passage (3). The protrusions (41) are fixedly connected to one end of the half ring (2). Several support plates (5) of various sizes are embedded between the side of the semi-ring (2) that is not fixedly connected to the semi-cylinder (1) and the semi-cylinder (1).

2. The structure for controlling the welding distortion of a CB2 material cylinder block according to claim 1, wherein The dimensions of the size support plate (5) are matched with the lower difference of the dimensions of the airway (3); And / or, the size support plate (5) is snapped between the semi-ring (2) and the semi-cylinder (1); And / or, several of the size support plates (5) are evenly distributed along the circumference of the cylinder body.

3. The structure for controlling the welding distortion of a CB2 material cylinder block according to claim 1, wherein The side of the semi-ring (2) that is not fixedly connected to the semi-cylinder (1) is provided with several tie rods (6) between it and the semi-cylinder (1).

4. The structure for controlling the welding distortion of CB2 material cylinder according to claim 1, wherein The half-cylinder (1) has a machining allowance at the split surface (11), and the two half-rings (2) are formed by dividing the inner ring along the diameter direction. The protrusion height of the boss (41) matches the machining allowance.

5. The structure for controlling the welding distortion of CB2 material cylinder according to claim 1, wherein The positioning block (4) passes through the air passage (3), and the overlap distance between one end of the positioning block (4) and the dividing surface (11) is set to 30-50mm.

6. The structure for controlling the welding distortion of CB2 material cylinder according to claim 1 or 2, wherein The cross section of the positioning block (4) is square, and the cross-sectional area of the positioning block (4) is not less than 900mm 2 ; And / or, the protrusion height of the positioning block (4) relative to the dividing surface (11) is set to 30-45mm; And / or, the material of the positioning block (4) is set to carbon steel.

7. The structure for controlling the welding distortion of CB2 material cylinder according to claim 1, wherein The half-cylinder (1) and / or the half-ring (2) are made of CB2 material.

8. The structure for controlling the welding deformation of CB2 material cylinder blocks according to claim 1, characterized in that, The two positioning blocks (4) are respectively welded to the two ends of the semi-ring (2).

9. The structure for controlling the welding deformation of a CB2 material cylinder block according to claim 1, characterized in that, The two ends of the positioning block (4) are lap-welded to the mid-section (11).

10. The structure for controlling the welding deformation of a CB2 material cylinder block according to claim 1, characterized in that, One side of the semi-ring (2) is first spot-welded to the inner wall of the semi-cylinder (1) and then assembled.

Images