Stainless steel butt-welded pipe fitting under ultralow-temperature working condition

Abstract

The utility model relates to the technical field of pipe fittings, in particular to a stainless steel butt welding pipe fitting under an ultralow temperature working condition, which comprises a first pipe body and a second pipe body which are used in an ultralow temperature working condition environment, and a plurality of main positioning grooves are arranged at two ends of the inner wall of each of the first pipe body and the second pipe body. A plugging ring is arranged in a gap between the end parts of the first pipe body and the second pipe body; according to the utility model, the magnetic attraction block and the magnetic attraction sheet are arranged at the deep part of the end part of the pipe fitting, namely, the magnetic attraction part is far away from the end surface of the pipe fitting, so that the end surface of the pipe fitting is not mixed with the magnetic attraction part when the pipe fitting is welded, and the phenomenon that the welding effect is not ideal due to the fact that the magnetic attraction part is melted or not melted during welding is avoided; meanwhile, as the magnetic attraction part is located in the deep position of the end of the pipe fitting, the phenomenon that the magnetic attraction part is directly exposed to the outside and is prone to being impacted and damaged is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe fittings, in particular to a stainless steel butt-welded pipe fitting for ultra-low temperature working conditions. Background Art

[0002] Stainless steel pipe fittings are widely used in various media transportation fields due to their low rust resistance. However, pipe fittings often need to be connected by welding during use or processing.

[0003] The existing Chinese patent with application number: 202122359485.1 discloses a stainless steel composite steel pipe butt welding connection structure, including a steel pipe main body and a connection structure, a connection structure is arranged in the middle of the steel pipe main body, the connection structure includes a first connecting member and a second connecting member, the first connecting member is installed on one side of the connection structure, and the second connecting member is arranged on the side end of the first connecting member; the steel pipe main body includes a first composite steel pipe and a second composite steel pipe, the first composite steel pipe is arranged on one side of the steel pipe main body, and the side end of the first composite steel pipe is connected to the second composite steel pipe.

[0004] When the above technology is in use, magnetic suction components are arranged at both ends of the pipe fittings, so that the pipe fittings have a certain degree of stability before being processed by butt welding. However, in actual use, since the strong magnetic layer is arranged on the end face of the pipe fittings, there is a risk of affecting the welding effect when the pipe fittings are welded, and the strong magnetic layer directly exposed to the outside world is easily damaged due to mutual collision during the transportation and installation of the pipe fittings. Therefore, in order to solve the above technical problems, we proposed a stainless steel butt-welding pipe fitting for ultra-low temperature working conditions. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a stainless steel butt-welded pipe fitting for ultra-low temperature working conditions.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A stainless steel butt-welded pipe fitting for ultra-low temperature working conditions, comprising a first pipe body and a second pipe body for use in ultra-low temperature working conditions, wherein both ends of the inner walls of the first pipe body and the second pipe body are provided with a plurality of main positioning grooves, a sealing ring is provided in the gap between the ends of the first pipe body and the second pipe body, and a plurality of corresponding main positioning columns are provided on both sides of the sealing ring corresponding to the main positioning grooves, an end of each main positioning column away from the sealing ring is inserted into the main positioning groove, a magnetic attraction block is provided inside the end of the main positioning column away from the sealing ring, and a matching magnetic attraction sheet is installed in the main positioning groove corresponding to the magnetic attraction block.

[0008] Preferably, the outer annular surfaces of the ends of the first tube body and the second tube body are both provided with identification grooves, and the inside of the identification grooves is painted with a color for identification.

[0009] Preferably, a plurality of auxiliary positioning posts are provided on both sides of the outer ring surface of the blocking ring, and matching auxiliary positioning grooves are provided at both ends of the first tube body and the second tube body corresponding to the auxiliary positioning posts.

[0010] Preferably, the cross section of the auxiliary positioning groove is circular, and the cross section of the auxiliary positioning column is rectangular.

[0011] Preferably, the number of the main positioning columns and the number of the auxiliary positioning columns are both three, and the main positioning columns and the auxiliary positioning columns are equidistantly and staggeredly arranged.

[0012] Preferably, a first fitting surface and a second fitting surface are respectively provided on one end of the main positioning post away from the blocking ring and on both sides of the blocking ring, and the first fitting surface and the second fitting surface are oriented in opposite directions.

[0013] Preferably, an operation hole is provided in the middle of the main positioning column, and the inner diameter of the blocking ring is the same as the inner diameters of the first tube body and the second tube body.

[0014] The utility model provides a stainless steel butt-welded pipe fitting for ultra-low temperature working conditions, which has the following beneficial effects:

[0015] 1: In the utility model, by additionally fixing a magnetic component in the pipe body, the two pipe bodies can maintain good stability through the mutual adsorption of the magnetic block and the magnetic sheet before welding, which is beneficial to subsequent welding. Moreover, since the magnetic block and the magnetic sheet are arranged deep at the end of the pipe fitting, that is, the magnetic component is far away from the end face of the pipe fitting, when the pipe fitting is welded, there will be no magnetic component mixed with the end face of the pipe fitting, thereby avoiding the phenomenon that the magnetic component melts or does not melt during welding and causes unsatisfactory welding effect. At the same time, since the magnetic component is located deep at the end of the pipe fitting, it is also avoided that the magnetic component is directly exposed to the outside world and is easily damaged by impact.

[0016] 2: The provision of the secondary positioning column in the utility model enables the first tube body and the second tube body to have a stronger connection stability, that is, when one or two of the positioning columns are damaged, a certain degree of connection stability can still be maintained; since the main positioning column and the secondary positioning column are equidistantly disposed, a stable and consistent connection effect can be obtained at all locations when the first tube body and the second tube body are connected; the provision of the first fitting surface and the second fitting surface facilitates a better fit between the sealing ring and the main positioning column and each tube body when they are combined, and is not easy to shake; the provision of the operating hole allows the sealing ring and the main positioning column to be conveniently removed from the first tube body or the second tube body after the first tube body and the second tube body are connected and before welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the connection between the first pipe body and the second pipe body of a stainless steel butt-welded pipe fitting for ultra-low temperature working conditions proposed by the utility model;

[0018] Figure 2 The utility model proposes a stainless steel butt welding pipe fitting for ultra-low temperature working conditions Figure 1 Schematic diagram of the splitting;

[0019] Figure 3 The utility model proposes a stainless steel butt welding pipe fitting for ultra-low temperature working conditions Figure 2 Schematic diagram of the splitting;

[0020] Figure 4 The utility model proposes a stainless steel butt welding pipe fitting for ultra-low temperature working conditions Figure 3 A is an enlarged schematic diagram;

[0021] Figure 5 This is a schematic diagram of a plugging ring, a main positioning column and a secondary positioning column of a stainless steel butt-welded pipe fitting for ultra-low temperature working conditions proposed by the utility model;

[0022] Figure 6 This is a structural schematic diagram of a stainless steel butt-welded pipe fitting for ultra-low temperature working conditions proposed by the utility model;

[0023] Figure 7 The utility model proposes a stainless steel butt welding pipe fitting for ultra-low temperature working conditions Figure 6 The enlarged schematic diagram of point B in FIG.

[0024] In the figure: 1. first tube body; 2. second tube body; 3. main positioning groove; 4. magnetic sheet; 5. sealing ring; 6. main positioning column; 7. magnetic block; 8. marking groove; 9. first fitting surface; 10. second fitting surface; 11. auxiliary positioning groove; 12. auxiliary positioning column; 13. operation hole. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] Example 1

[0027] Reference Figure 1-7A stainless steel butt-welded pipe fitting for ultra-low temperature working conditions, comprising a first pipe body 1 and a second pipe body 2 for use in ultra-low temperature working conditions, a plurality of main positioning grooves 3 are provided at both ends of the inner walls of the first pipe body 1 and the second pipe body 2, a blocking ring 5 is provided in the gap between the ends of the first pipe body 1 and the second pipe body 2, a plurality of corresponding main positioning columns 6 are provided on both sides of the blocking ring 5 corresponding to the main positioning grooves 3, one end of each main positioning column 6 away from the blocking ring 5 is inserted into the main positioning groove 3, a magnetic block 7 is provided inside the end of the main positioning column 6 away from the blocking ring 5, and a matching magnetic sheet 8 is installed corresponding to the magnetic block 7 in the main positioning groove 3.

[0028] Example 2

[0029] Reference Figure 1-7 , when other parts are the same as those in Example 1, the difference between this embodiment and Example 1 is that:

[0030] The outer ring surfaces of the ends of the first tube body 1 and the second tube body 2 are both provided with identification grooves 8, and the inside of the identification grooves 8 is painted with a color for identification. The setting of the identification grooves 8 is to facilitate personnel to judge whether the angles of the two tubes correspond by setting the identification grooves 8 before welding the tubes, that is, when personnel are butting the two tubes, and the color inside the identification grooves 8 is convenient for prompting the recognition of the identification grooves 8; a plurality of auxiliary positioning columns 12 are provided on both sides of the outer ring surface of the blocking ring 5, and the auxiliary positioning columns 12 at both ends of the first tube body 1 and the second tube body 2 are provided with matching auxiliary positioning grooves 1 1. The provision of the secondary positioning column 12 enables the first tube body 1 and the second tube body 2 to have a stronger connection stability, that is, when one or two of the positioning columns are damaged, a certain degree of connection stability can still be maintained; the secondary positioning groove 11 has a circular cross-section, and the secondary positioning column 12 has a rectangular cross-section. Since the secondary positioning groove 11 is circular and the secondary positioning column 12 is rectangular, when the two are combined, the gas can escape from the gap on both sides of the combination, that is, it is avoided that the body wall between the secondary positioning column 12 and the secondary positioning groove 11 is too smooth, resulting in the gas being unable to escape and ultimately affecting the combination.

[0031] The number of the main positioning columns 6 and the auxiliary positioning columns 12 are both three, and the main positioning columns 6 and the auxiliary positioning columns 12 are equidistantly arranged in an alternating manner. Since the main positioning columns 6 and the auxiliary positioning columns 12 are equidistantly arranged, a stable and consistent connection effect can be obtained at all locations when the first tube body 1 and the second tube body 2 are connected; a first fitting surface 9 and a second fitting surface 10 are respectively provided at one end of the main positioning column 6 away from the sealing ring 5 and on both sides of the sealing ring 5, and the first fitting surface 9 and the second fitting surface 10 are in opposite directions. The setting of the first fitting surface 9 and the second fitting surface 10 facilitates the sealing ring 5 and the main positioning column 6 to have a better fit with each tube body when they are combined, and is not easy to shake; an operating hole 13 is provided in the middle of the column body of the main positioning column 6, and the inner diameter of the sealing ring 5 is the same as the inner diameter of the first tube body 1 and the second tube body 2. The setting of the operating hole 13 can conveniently remove the sealing ring 5 and the main positioning column 6 from the first tube body 1 or the second tube body 2 after the first tube body 1 and the second tube body 2 are connected and before welding.

[0032] Principle and advantages of use: During the use of the utility model, the material of the first tube body 1 and the second tube body 2 can be selected according to the low-temperature scene required for use, and the magnetic sheet 4 is a metal sheet with magnetic attraction, and the magnetic sheet 4 and the first tube body 1 and the second tube body 2 can be installed by welding, bonding, etc., and it only needs to be strong enough to meet the suction force of the magnetic block 7 after installation; and then when the pipe fittings proposed in this scheme are butt-welded, the personnel first insert the sealing ring 5 into the main positioning column 6 on one side into the main positioning column 6 at the end of the first tube body 1 or the second tube body 2. The staff can then connect the end of another tube body, namely the second tube body 2 or the first tube body 1, through the main positioning groove 3 of this end with the main positioning column 6 on the other side of the blocking ring 5, and then the first tube body 1 is connected to the second tube body 2 through the main positioning column 6, the blocking ring 5, and the main positioning column 6, and in this process, the magnetic block 7 in the end of the main positioning column 6 absorbs the magnetic sheet 4 in the main positioning groove 3, that is, at this time, the pulling force exerted on the first tube body 1 and the second tube body 2 is less than the suction force of the magnetic block 7, and the two will not separate, thereby facilitating the maintenance of the stability of the tube body during subsequent welding.

[0033] To sum up, when the present solution is in use, by additionally fixing a magnetic component in the tube body, the two tube bodies can maintain good stability through the mutual adsorption of the magnetic block 7 and the magnetic sheet 4 before welding, which is beneficial to subsequent welding. Moreover, since the magnetic block 7 and the magnetic sheet 4 are arranged deep at the end of the pipe fitting, that is, the magnetic component is away from the end face of the pipe fitting, when the pipe fitting is welded, there will be no magnetic component mixed with the end face of the pipe fitting, thereby avoiding the phenomenon that the magnetic component melts or does not melt during welding and causes unsatisfactory welding effect. At the same time, since the magnetic component is located deep at the end of the pipe fitting, it is also avoided that the magnetic component is directly exposed to the outside world and is easily damaged by impact.

[0034] It should be further explained that the setting of the identification groove 8 is to facilitate personnel to judge whether the angles of the two pipes correspond by the setting of the identification groove 8 before welding the pipes, that is, when personnel are butting two pipes, and the color in the identification groove 8 is convenient for prompting the recognition of the identification groove 8; the setting of the secondary positioning column 12 makes the connection between the first pipe body 1 and the second pipe body 2 have a stronger stability, that is, when one or two positioning columns are damaged, a certain degree of connection stability can still be maintained; because the secondary positioning groove 11 is circular and the secondary positioning column 12 is rectangular, when the two are combined, the gas can escape from the gap on both sides of the joint, That is, it avoids the phenomenon that the body wall between the secondary positioning column 12 and the secondary positioning groove 11 is too smooth, which prevents the gas from escaping and ultimately affects the combination; since the main positioning column 6 and the secondary positioning column 12 are equidistantly arranged, the first tube body 1 and the second tube body 2 can be connected at all locations to achieve a stable and consistent connection effect; the setting of the first fitting surface 9 and the second fitting surface 10 facilitates the sealing ring 5 and the main positioning column 6 to fit better with each tube body when combined, and is not easy to shake; the setting of the operating hole 13 can conveniently remove the sealing ring 5 and the main positioning column 6 from the first tube body 1 or the second tube body 2 after the first tube body 1 and the second tube body 2 are connected and before welding.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A stainless steel butt-welded pipe fitting for ultra-low temperature working conditions, comprising a first pipe body (1) and a second pipe body (2) for use in ultra-low temperature working conditions, characterized in that: A plurality of main positioning grooves (3) are provided at both ends of the inner walls of the first tube body (1) and the second tube body (2); a blocking ring (5) is provided in the gap between the ends of the first tube body (1) and the second tube body (2); a plurality of corresponding main positioning columns (6) are provided on both sides of the blocking ring (5) corresponding to the main positioning grooves (3); one end of each main positioning column (6) away from the blocking ring (5) is inserted into the main positioning groove (3); a magnetic attraction block (7) is provided inside the end of the main positioning column (6) away from the blocking ring (5); and a matching magnetic attraction sheet (4) is installed inside the main positioning groove (3) corresponding to the magnetic attraction block (7).

2. A stainless steel butt-welded pipe fitting for ultra-low temperature working conditions according to claim 1, characterized in that: The outer annular surfaces of the ends of the first tube body (1) and the second tube body (2) are both provided with identification grooves (8), and the interior of the identification grooves (8) is painted with a color for identification.

3. The stainless steel butt-welded pipe fitting for ultra-low temperature working conditions according to claim 1, characterized in that: A plurality of auxiliary positioning columns (12) are provided on both sides of the outer ring surface of the sealing ring (5), and the auxiliary positioning columns (12) at both ends of the first tube body (1) and the second tube body (2) are provided with matching auxiliary positioning grooves (11).

4. The stainless steel butt-welded pipe fitting for ultra-low temperature working conditions according to claim 3, characterized in that: The auxiliary positioning groove (11) has a circular cross section, and the auxiliary positioning column (12) has a rectangular cross section.

5. The stainless steel butt-welded pipe fitting for ultra-low temperature working conditions according to claim 4, characterized in that: The number of the main positioning columns (6) and the number of the auxiliary positioning columns (12) are both three, and the main positioning columns (6) and the auxiliary positioning columns (12) are arranged in an equidistant and staggered manner.

6. The stainless steel butt-welded pipe fitting for ultra-low temperature working conditions according to claim 1, characterized in that: The end of the main positioning column (6) away from the sealing ring (5) and the two sides of the sealing ring (5) are respectively provided with a first fitting surface (9) and a second fitting surface (10), and the first fitting surface (9) and the second fitting surface (10) are oriented in opposite directions.

7. The stainless steel butt-welded pipe fitting for ultra-low temperature working conditions according to claim 1, characterized in that: An operating hole (13) is provided in the middle of the main positioning column (6), and the inner diameter of the blocking ring (5) is the same as the inner diameters of the first tube body (1) and the second tube body (2).

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