Assembling method of novel pipe assembly and pipe assembly

Abstract

The invention belongs to the technical field of assembling of novel pipe assemblies, and particularly relates to an assembling method of a novel pipe assembly and a pipe assembly manufactured through the method, and when a stainless steel pipe and a copper pipe are connected through furnace welding at the temperature of 900-1130 DEG C, a reinforcing part is arranged at the joint of the stainless steel pipe and the copper pipe. The reinforcing part is a double-trimming flange sleeve, the double-trimming flange sleeve comprises a double-trimming flange sleeve body and a flange ring, the lower bottom surface of the flange ring and the double-trimming flange sleeve body below the flange ring are tightly connected to the stainless steel pipe, and the contact surface is subjected to furnace welding; and the inner wall of the double-trimming flange sleeve body above the flange ring is tightly connected with the outer wall surface of the copper pipe, and the contact surface is subjected to furnace welding. The welding effect of the copper pipe is optimized mainly through a copper bush and copper pipe separated and integrated assembling method and a stainless steel flaring and necking structure and copper pipe assembling method, the situation that the copper pipe is damaged by welding flux during furnace welding is reduced, and welding between the copper pipe and a pipe assembly during furnace welding is firmer.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration testing, and specifically relates to an assembly method for a new type of pipe assembly and the pipe assembly. Background Art

[0002] In the traditional technology, the copper pipe is connected with the pipe assembly by interference fit. Referring to Figure 5 as shown, wire drawing and bumping are used to ensure the penetration depth and depth during furnace welding of the pipe assembly. During assembly, improper control of the dimensional accuracy of the copper pipe and the pipe assembly may lead to an excessive interference amount, thus increasing the assembly difficulty; the tolerances of the inner diameter of the copper pipe or the outer diameter of the pipe assembly exceed the design requirements, making it difficult to assemble due to too tight fit between the two. The wire drawing and bumping processes may cause the surface roughness of the inner surface of the copper pipe or the outer surface of the pipe assembly not to meet the requirements. Excessive roughness will increase the friction force and hinder the assembly;

[0003] The position, shape or size of the bumped points is inappropriate, resulting in local heat concentration during furnace welding, thus causing welding damage. If the bumped points are too high or unevenly distributed, the gap between the copper pipe and the pipe assembly during welding will be uneven, affecting the formation of the weld seam; unreasonable settings of parameters such as the temperature, time, and atmosphere of furnace welding may lead to unstable welding process and welding damage. If the welding temperature is too high or the time is too long, the metal at the weld seam will overheat and cause ablation phenomenon, and welding damage will occur during furnace welding;

[0004] In order to optimize the assembly process and reduce welding damage during furnace welding, the assembly process of the copper pipe and the pipe assembly is redesigned. Summary of the Invention

[0005] To solve the above technical problems, the present invention provides the following technical solutions:

[0006] An assembly method for a new type of pipe assembly. When a stainless steel pipe and a copper pipe are connected by furnace welding at 900 - 1130 °C, a strengthening part is arranged at the connection part between the stainless steel pipe and the copper pipe.

[0007] In a further optimized scheme, the strengthening part is a double-cut edge flange sleeve. The double-cut edge flange sleeve includes a double-cut edge flange sleeve body and a flange ring. The lower bottom surface of the flange ring and the double-cut edge flange sleeve body below the flange ring are closely attached to the stainless steel pipe, and the contact surface is subjected to furnace welding; the inner wall of the double-cut edge flange sleeve body above the flange ring is closely attached to the outer wall surface of the copper pipe, and the contact surface is subjected to furnace welding.

[0008] In a further optimized scheme, when the contact surface with the stainless steel pipe is a flat contact, the double-cut edge flange sleeve is matched with it for furnace welding with a flat bottom; when the contact surface with the stainless steel pipe is a curved surface contact, the contact surface of the double-cut edge flange sleeve can be bent and matched with it for furnace welding.

[0009] In a further optimized solution, the strengthening part is an integrally formed copper tube part obtained by passivating the bottom of the copper tube, and the integrally formed copper tube part is welded to the stainless steel tube by one-time furnace welding.

[0010] In a further optimized solution, the connection port on the stainless steel tube connected to the copper tube is a hole punched in the stainless steel tube; the connection port on the stainless steel tube connected to the copper tube is a reduced diameter part of the stainless steel tube; the connection port on the stainless steel tube connected to the copper tube is an enlarged diameter part of the stainless steel tube.

[0011] In a further optimized solution, the outer diameters of the hole, the reduced diameter part of the stainless steel tube 1, and the enlarged diameter part of the stainless steel tube 1 are 4 - 12.7 mm, and the wall thickness is 0.3 - 1.5 mm.

[0012] In a further optimized solution, the material of the double-edge flange sleeve is copper; the material of the double-edge flange sleeve is a material that does not undergo a chemical reaction during furnace welding.

[0013] A novel tube assembly is assembled by the method described in any one of the above.

[0014] Compared with the prior art:

[0015] Mainly through the separate and integral assembly methods of the copper sleeve and the copper tube, as well as the assembly method of the stainless steel enlarged diameter and reduced diameter structures and the copper tube, the welding effect of the copper tube is optimized, the situation of the copper tube being damaged by the solder during furnace welding is reduced, and the welding between the copper tube and the tube assembly during furnace welding is made more firm. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of an embodiment in the separate assembly method of the copper sleeve and the copper tube in the present invention;

[0017] Figure 2 It is a schematic structural diagram of an embodiment in the integral assembly method of the copper tube in the present invention;

[0018] Figure 3 It is a schematic structural diagram when the stainless steel enlarged diameter structure is welded to the copper tube in the present invention;

[0019] Figure 4 It is a schematic structural diagram when the stainless steel reduced diameter structure is welded to the copper tube in the present invention;

[0020] Figure 5 It is a schematic structural diagram of the copper tube structure with wire drawing and bumping. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0022] The present invention provides an assembly method for a novel pipe assembly. Please refer to Figures 1 - 4 When the stainless steel pipe 1 and the copper pipe 2 are connected by furnace welding at 900 - 1130 °C, a strengthening part is arranged at the connection of the stainless steel pipe 1 and the copper pipe 2.

[0023] In some embodiments, the strengthening part is a split type. Please refer to Figure 1 、 3 、4. This solution can optimize the welding effect of the copper pipe, reduce the situation that the copper pipe is damaged by the solder during furnace welding, and make the welding between the copper pipe and the pipe assembly more firm during furnace welding.

[0024] The strengthening part is a double-edge flange sleeve 3. The double-edge flange sleeve 3 includes a double-edge flange sleeve body 31 and a flange ring 32. The flange ring 32 radially extends from the middle of the double-edge flange sleeve body 31. The lower bottom surface of the flange ring 31 and the double-edge flange sleeve body 31 below the flange ring 32 are closely attached to the stainless steel pipe 1 and the furnace welding contact surface; the inner wall of the double-edge flange sleeve body 31 above the flange ring 32 is closely attached to the outer wall surface of the copper pipe 2 and the furnace welding contact surface.

[0025] In a further embodiment, there is a welding sequence. The lower bottom surface of the flange ring 31 and the double-edge flange sleeve body 31 below the flange ring 32 are closely attached to the stainless steel pipe 1 and the furnace welding contact surface; then the inner wall of the double-edge flange sleeve body 31 above the flange ring 32 is closely attached to the outer wall surface of the copper pipe 2 and the furnace welding contact surface.

[0026] In a further embodiment, when the contact surface between the double-edge flange sleeve 3 and the stainless steel pipe 1 is a plane, the double-edge flange sleeve 3 is furnace welded with its flat bottom; the flat bottom refers to the flange ring 31.

[0027] In a further embodiment, when the contact surface with the stainless steel pipe 1 is an arc surface contact, the contact surface of the double-edge flange sleeve 3 can be bent to cooperate with the furnace welding; the bending refers to the flange ring 31.

[0028] In a further embodiment, the material of the double-edge flange sleeve 3 is copper;

[0029] In a further embodiment, the material of the double-edge flange sleeve 3 is a material that does not undergo a chemical reaction during furnace welding, such as: stainless steel, aluminum alloy, steel and other materials.

[0030] In some embodiments, please refer to Figure 2 This solution is an integrated furnace welding solution. The solution cancels the copper pipe, passivates the bottom of the copper pipe to replace the use process of the copper sleeve, and makes the copper pipe integral molding part, without the need for two welding processes, and can simplify the processing process of furnace welding between the stainless steel pipe and the copper pipe on the premise of meeting the strength and furnace welding effect of the copper pipe.

[0031] The reinforcing part is a copper tube integral molding formed by passivating the bottom of the copper tube 2. The passivation forms a radial convex part 21. The lower bottom surface of the radial convex part 21 and the copper tube 2 below the radial convex part 21 are closely attached to the stainless steel tube 1, and the copper tube integral molding is welded to the stainless steel tube 1 by one-time furnace welding. This processing technology enables the copper tube 2 to better cooperate with the stainless steel tube 1, optimizes the furnace welding process, reduces welding damage, and optimizes the penetration depth and appearance of the furnace welding.

[0032] In some embodiments, refer to Figure 1 , 2 , the connection port on the stainless steel tube 1 connected to the copper tube 2 is a hole punched on the stainless steel tube 1;

[0033] In some embodiments, refer to Figure 3 , the connection port on the stainless steel tube 1 connected to the copper tube 2 is a flared opening of the stainless steel tube;

[0034] In some embodiments, refer to Figure 4 , the connection port on the stainless steel tube 1 connected to the copper tube 2 is a reduced opening of the stainless steel tube.

[0035] In the above embodiments, it is particularly applicable to the processing technology during the furnace welding of small holes of the stainless steel tube assembly and small copper tubes. The outer diameters of the holes, the reduced opening of the stainless steel tube 1, and the flared opening of the stainless steel tube 1 are 4 - 12.7 mm, and the wall thickness is 0.3 - 1.5 mm.

[0036] The present invention also provides a new type of tube assembly assembled by the method described above.

[0037] Although the present invention has been described above with reference to the embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the disclosed embodiments of the present invention can be combined with each other in any way. The reason for not exhaustively describing the situations of these combinations in this specification is only to save space and resources. Therefore, the present invention is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. An assembling method for a novel pipe assembly, characterized in that when a stainless steel pipe and a copper pipe are connected by furnace welding at 900 - 1130 °C, a strengthening part is arranged at the connection of the stainless steel pipe and the copper pipe.

2. The assembling method for a novel pipe assembly according to claim 1, characterized in that the strengthening part is a double-cut edge flange sleeve, and the double-cut edge flange sleeve includes a double-cut edge flange sleeve body and a flange ring. The lower bottom surface of the flange ring and the double-cut edge flange sleeve body below the flange ring are closely attached to the stainless steel pipe, and the contact surface is subjected to furnace welding; the inner wall of the double-cut edge flange sleeve body above the flange ring is closely attached to the outer wall surface of the copper pipe, and the contact surface is subjected to furnace welding.

3. The assembling method for a novel pipe assembly according to claim 2, characterized in that when the contact surface with the stainless steel pipe is a flat contact, the double-cut edge flange sleeve is matched with it for furnace welding with a flat bottom; when the contact surface with the stainless steel pipe is an arc contact, the contact surface of the double-cut edge flange sleeve can be bent and pressed to be matched with it for furnace welding.

4. The assembling method for a novel pipe assembly according to claim 1, characterized in that the strengthening part is a copper pipe integrally formed part formed by passivating the bottom of the copper pipe, and the copper pipe integrally formed part is welded to the stainless steel pipe by one-time furnace welding.

5. The assembling method for a novel pipe assembly according to claim 1, characterized in that the connection port on the stainless steel pipe connected to the copper pipe is a hole punched on the stainless steel pipe; the connection port on the stainless steel pipe connected to the copper pipe is a necked-down part of the stainless steel pipe; the connection port on the stainless steel pipe connected to the copper pipe is a flared part of the stainless steel pipe.

6. The assembling method of a novel pipe assembly according to claim 5, characterized in that, The outer diameters of the hole, the necked-down part of the stainless steel pipe 1, and the flared part of the stainless steel pipe 1 are 4 - 12.7 mm, and the wall thickness is 0.3 - 1.5 mm.

7. The assembling method of a novel pipe assembly according to claim 1, characterized in that, The material of the double-cut edge flange sleeve is copper; The material of the double-cut edge flange sleeve is a material that does not undergo chemical reactions during furnace welding.

8. A novel pipe component, characterized in that, Assembled by the method according to any one of claims 1 - 7.

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