CN108526636B

CN108526636B - Shock-absorbing tube and manufacturing method thereof

Info

Publication number: CN108526636B
Application number: CN201710130376.8A
Authority: CN
Inventors: 不公告发明人
Original assignee: Xinchang Sitong Electromechanical Co ltd
Current assignee: Xinchang Sitong Electromechanical Co ltd
Priority date: 2017-03-06
Filing date: 2017-03-06
Publication date: 2021-06-08
Anticipated expiration: 2037-03-06
Also published as: CN108526636A

Abstract

The invention discloses a method for manufacturing a shock absorption pipe, which comprises the following steps: a solder placing procedure, wherein the solder is placed on a placing part of the inner cavity of the adapter; a pipe fitting assembling procedure, wherein the corrugated pipe and the adapter are respectively arranged on the adapter matching part on the corresponding side of the adapter, so that the inner cavity of the adapter is communicated with the inner cavity of the corrugated pipe and the inner cavity of the adapter, and the corrugated pipe, the adapter and the adapter are fixed or limited to obtain a pipe fitting assembly; and in the component welding procedure, the pipe fitting assembly of the external connecting pipe is welded in the furnace, and the damping pipe main body is obtained. The invention also provides an integrally welded shock-absorbing tube, which has better welding consistency and can improve the connection reliability of parts.

Description

Shock-absorbing tube and manufacturing method thereof

Technical Field

The embodiment of the invention relates to a pipeline part, in particular to a shock absorption pipe used in a refrigeration system of an air conditioner, a refrigerator and the like and a manufacturing method thereof.

Background

In the application fields of air conditioners, refrigerators and the like, damping pipes (or called damping pipes, shockproof pipes and the like) are often adopted to connect a compressor and a circulation pipeline of a refrigeration system or other occasions needing damping so as to absorb vibration and noise generated by the compressor.

The damping pipe main body is mostly a corrugated pipe, and the direct pipe fitting connected with the circulating pipeline has difficulty. Therefore, in the prior art, the adapter is welded on the corrugated pipe and then the external pipe is welded for assembly, in the prior art, after the corrugated pipe, the adapter and the external pipe are assembled, the corrugated pipe and the adapter and the connecting pipe and the adapter are respectively welded, and the whole damping pipe is manufactured by at least a secondary welding process, so that the welding consistency is not ideal. This affects the connection reliability of the shock-absorbing tube to some extent, and thus there is a room for improvement.

Disclosure of Invention

In view of the defects of the prior art, an object of the embodiments of the present invention is to provide a shock absorbing tube and a method for manufacturing the same, so as to improve the connection reliability of the shock absorbing tube.

In order to solve the technical problem, the embodiment of the invention provides the following technical scheme: the utility model provides a shock attenuation pipe, includes the bellows, the bellows includes the bellows main part of mid portion, the bellows main part's at least one end sets up the bellows linkage segment of axial extension, the welding of bellows linkage segment has the adaptor, the adaptor simultaneously with take over the welding outward, the adaptor has the adaptor inner chamber, the adaptor inner chamber with the inner chamber of bellows with the inner chamber intercommunication of taking over outward, the both sides of adaptor inner chamber set up adaptor cooperation portion respectively, the bellows linkage segment with take over the joint segment outward and socket joint respectively in corresponding side adaptor cooperation portion welding, bellows, adaptor, take over outward and assemble together and weld through the stove and fix as an organic whole.

Meanwhile, the embodiment of the invention also provides a manufacturing method of the shock absorption tube, and the technical scheme is as follows: a method for manufacturing a shock absorption tube comprises a corrugated tube, an adapter and an external connection tube, wherein: the corrugated pipe comprises a corrugated pipe main body at the middle part, and is characterized in that at least one end of the corrugated pipe main body is provided with an axially extending corrugated pipe connecting section; the adaptor has the adaptor inner chamber, the middle part of adaptor inner chamber sets up solder portion, the both ends of adaptor inner chamber set up adaptor cooperation portion, the shock attenuation pipe is made and is included following process:

a solder placing procedure: placing solder on a solder part of the inner cavity of the adapter;

a pipe fitting assembling process: assembling the corrugated pipe, the adapter and the external pipe together, so that the corrugated pipe is matched and fixed or limited with the adapter matching part on the corresponding side, and the external pipe is matched and fixed or limited with the external pipe matching part on the corresponding side of the adapter, so that the inner cavity of the adapter is communicated with the inner cavity of the corrugated pipe and the inner cavity of the external pipe to obtain a pipe assembly;

and (3) assembly welding procedure: and welding the pipe fitting assembly comprising the corrugated pipe, the adapter and the external connecting pipe in the furnace to obtain the damping pipe main body.

Compared with the prior art, the corrugated pipe, the connecting pipe and the adapter piece are assembled into the pipe fitting assembly to be welded in the furnace integrally, and the welding process is completed uniformly, so that the welding consistency among the pipe fittings is better, and the connection reliability among the shockproof pipe parts is improved. In addition, the process can be simplified by integrally welding all the pipe fittings, and the production efficiency is improved.

Drawings

FIG. 1 is a schematic view of a shock tube according to an embodiment of the present invention;

FIG. 2 is a schematic axial cross-sectional view of the shock tube shown in FIG. 1;

FIG. 3 is a schematic view of the shock tube of FIG. 1 with the first and second extension tubes removed;

FIG. 4 is a schematic axial cross-sectional view of the shock tube shown in FIG. 3;

FIG. 5 is a schematic view of the bellows of FIG. 1;

FIG. 6 is an axial cross-sectional view of the bellows of FIG. 5;

FIG. 7 is an enlarged view of portion I of FIG. 6;

FIG. 8 is a schematic view of the transition piece of FIG. 1;

FIG. 9 is an axial cross-sectional view of the adapter of FIG. 8;

FIG. 10 is a schematic view of the first extension tube of FIG. 1;

FIG. 11 is a cross-sectional view of the first extension tube and the second extension tube shown in FIG. 10;

FIG. 12 is an enlarged view of section II of FIG. 11;

FIG. 13 is a schematic view of the first extension tube of FIG. 11;

FIG. 14 is a schematic cross-sectional view of the second outer joint tube of FIG. 12 in cooperation with an adapter;

FIG. 15 is an enlarged view of section III of FIG. 14;

FIG. 16 is a schematic view of a blank of the pressing ring of FIG. 1;

FIG. 17 is a flow chart of a method of manufacturing a shock tube according to an embodiment of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the following detailed description is made with reference to the accompanying drawings and the detailed description.

For convenience, the invention is defined by the numerical ranges referred to in the description: in one aspect, the threshold includes a number, such as 2.5 or more is greater than or equal to 2.5, 10 or less within 10, greater than or equal to-8 above-8, and the like; on the other hand, the approximate number or divisor is calculated as ± 10% of the central value, e.g., about 15 means 15 ± 10%, about 3 means 3 ± 10%, corresponding to 6 being 6 ± 10%, about 120 means 120 ± 10%, about 6.2 being 6.2 ± 10%, … …, etc.; by analogy, the above steps are not sufficient.

Please refer to fig. 1 to fig. 16, which respectively illustrate a shock absorbing tube and the bellows, an adaptor, a connection tube, and a blank of a clamping ring according to an embodiment of the present invention. In the drawings, the axial direction refers to the axial direction of the pipe fitting, the circumferential direction refers to the circumference perpendicular to the axis of the pipe fitting, and the radial direction is the circumferential radius direction perpendicular to the axis of the pipe fitting; the outer side refers to the side away from the bellows and the inner side is the side close to the bellows. Where the following text refers to the above terms, this is to be understood as meaning, unless otherwise indicated.

Referring to fig. 1 to 4, the shock absorbing tube according to the embodiment of the present invention is composed of a corrugated tube 1, an adaptor 3a (first adaptor), an adaptor 3b (second external connection tube), an external connection tube 5 (first external connection tube), an external connection tube 6 (second external connection tube), a braided mesh tube 2, a clamping ring 4a, a clamping ring 4b, and the like, wherein: in the present embodiment, since the adapter 3a and the adapter 3b have the same structure, the two are sometimes simply represented by the adapter 3 without distinguishing the adapters 3a and 3 b; similarly, since the pressing rings 4a and 4b have the same structure, the adaptor 4 is sometimes simply used as the adaptor 4 without distinguishing the pressing rings 4a and 4 b; the shock tube may also be of the type having an adaptor or clamping ring on one side, particularly the end connected to or relatively close to the source. The basic structure and function of the components in the shock tube are as follows.

The structure of the corrugated pipe 1 is shown in fig. 5 to 7, which includes a corrugated pipe main body section 11 at the middle part, a corrugated pipe connecting section 12a (a first corrugated pipe connecting section) and a corrugated pipe connecting section 12b (a second corrugated pipe connecting section) axially extend from two ends of the corrugated pipe main body section 11, where the connecting sections are sometimes also referred to as extending sections, they are tubular structures, and their length is generally between 5mm to 10 mm; in addition, under the condition that the corrugated pipe is relatively large, the length can be properly prolonged; in the case of a particularly compact construction, the length of the bellows connecting section 12b can be between 3mm and 6 mm. It should be noted that, in the present embodiment, since the bellows connection segment 12a and the bellows connection segment 12b have the same structure, the bellows connection segment 12 is sometimes used as a whole, and the bellows connection segment 12a and the bellows connection segment 12b are not distinguished, and both sides of the bellows connection segment may not have a symmetrical structure.

As shown in fig. 1, an adapter 3a and an adapter 3b are respectively welded to the outer side ends of the bellows connection section 12a, wherein the adapter 3a is connected to the external connection pipe 5, and the adapter 3b is connected to the external connection pipe 6; the bellows connecting section 12a, the external connecting pipe 5 and the adapter 3a, and the bellows connecting section 12b, the external connecting pipe 6 and the adapter 3b are respectively preliminarily fixed or limited, and can be assembled in a transition fit mode (the design parameters can be selected as +0.03/0 of a matched shaft and +0.04/0 of a matched hole), and after the assembly is finished, the welding mode is adopted in a tunnel furnace for welding, and the welding mode is specifically as follows; in addition, the assembly can also be assembled in a tool fixing or limiting mode, and the assembly part is welded in a tunnel furnace welding mode; the adapter, the corrugated pipe and the external pipe are relatively fixed or limited by adopting a dotting fixing mode or a mode that a convex part is arranged on one of the components, then the assembly part is welded by adopting a tunnel furnace welding mode, the consistency of the shock absorption pipe is relatively better by adopting tunnel furnace welding than flame brazing, and the influence of the adapter, the corrugated pipe and the external pipe on the material is smaller than that of separate welding after the adapter, the corrugated pipe and the external pipe are welded simultaneously.

Referring to fig. 8 to 9, the adaptor 3 has an adaptor cavity 32, the adaptor cavity 32 is communicated with the cavity of the corrugated tube 1, and the adaptor is provided with a solder part corresponding to the adaptor cavity 32 for placing solder (not shown). The corrugated pipe connecting section 12a and the joint section of the external connecting pipe 5 are respectively inserted in the adaptor matching parts at two ends of the inner cavity of the adaptor 3a, and the corrugated pipe connecting section 12a and the external connecting pipe 5 can be provided with guide sections which are locally in a necking structure. The joint sections of the corrugated pipe connecting section 12b and the external connecting pipe 6 are respectively inserted in the adapter matching parts at two ends of the inner cavity of the adapter 3b, and the joint parts of all the parts can be in transition matching, so that the corrugated pipe connecting section cannot be scattered when being placed in a tunnel furnace, and an extra tool is not needed to be fixed. In addition, a clearance part is arranged between the wall part of the inner cavity matched between the corrugated pipe connecting section and the adapter piece, and a clearance part is also arranged on the wall part of the inner cavity matched between the connector section of the external connecting pipe and the adapter piece. Therefore, when in welding, the welding flux placed in the inner cavity of the adapter correspondingly flows into the gap part between the connecting section of the corrugated pipe and the adapter and the gap part between the joint section of the external connecting pipe and the adapter after being melted, so as to realize welding.

As shown in fig. 1, the corrugated tube 1 may further be provided with a woven mesh tube 2, so as to further protect the corrugated tube 1 in the shock absorbing tube, the woven mesh tube 2 may protect the exterior of the corrugated tube 1, and the corrugated tube 1 may not be directly affected when being damaged by the exterior, and the woven mesh tube 2 may be a stainless steel woven mesh having relatively good strength and toughness. After welding of each pipe fitting is finished, the woven mesh pipe 2 is sleeved on the corrugated pipe main body section 11 in a coating mode, two end heads of the woven mesh pipe 2 are respectively rotated into the pressing ring 4a and the pressing ring 4b, and the pressing ring is deformed in a mode of extruding a pressing ring blank body, so that the woven mesh pipe 2 is fixedly connected with the pressing ring and the adapter, the pressing ring does not need to be welded with the adapter or the corrugated pipe, and the welding process of the pressing ring 4a and the pressing ring 4b is omitted. Incidentally, the transverse indentations 40 on the clamping ring 4 in fig. 1 are shown only schematically and they can be eliminated by grinding and shaping and will not be described in detail.

As shown in fig. 1 to 2, the embodiment optimizes the welding structure of the shock absorbing tube, and the welding part thereof includes a corrugated tube 1, two adapters 3a and 3b, and two

external tubes

5 and 6, wherein: the external pipe 5 can be a common external pipe such as a copper pipe and the like for connecting with a system, so that the shock absorption pipe is favorably connected with the system under the condition that the main body of the system is made of copper; the extension tube 6 may be an extension tube with a flared portion, which is provided with extension

tube coupling segments

52, 62, respectively, as shown in detail in fig. 10-15. The two adapters 3a and 3b can respectively place solder at specific positions in the cavity 32 of the adapter, the corrugated pipe connecting section 12a at one end of the corrugated pipe 1 is matched with the adapter matching part at the inner side of the adapter 3a, and the external pipe joint section 52 is matched with the adapter matching part at the outer side of the adapter 3 a; similarly, the bellows connection section 12b at the other end is engaged with the adaptor engagement portion inserted and received inside the adaptor 3b, and the external tube coupling section 62 is engaged with the adaptor engagement portion outside the adaptor 3b, so that the bellows 1 and the two

external tubes

5 and 6 can be respectively fixed and welded by the adaptors 3a and 3b through tunnel furnace welding.

The basic processing process of the shock absorption tube comprises the following steps: the inner cavities of the adapters 3a and 3b are respectively provided with welding materials, the corrugated

pipe connecting sections

12a and 12b of the corrugated pipe 1 and the joint sections of the external connecting

pipes

5 and 6 are respectively matched and arranged with the corresponding adapter matching parts according to the mode, after the components are assembled into a whole, the assembled parts are brazed in a furnace through a tunnel furnace to complete welding, and in addition, the assembled parts can be uniformly arranged on a tool (not shown) to be welded through the tunnel furnace or other integrated welding equipment such as a vacuum welding chamber or a gas protection welding chamber. In the welding process, the solder flows into the gaps among the corrugated pipe connecting section 12a, the external pipe joint section 52 and the inner cavity of the adapter 3a and the gaps among the corrugated pipe connecting section 12b, the external pipe joint section 62 and the inner cavity of the adapter 3b after being melted, so that the corrugated pipe 1 is welded with the two corresponding adapters 3a and 3b and the

external pipes

5 and 6.

It should be noted that in order to ensure that the solder flows into the

bellows connection sections

12a, 12b, the clearance between the

external coupling section

52, 62 and the inner cavity of the mating portion of the corresponding adapter 3a, 3b, these clearance parameters should be properly designed: too small a gap may prevent solder from penetrating effectively; the gap is too large, and the solder can permeate the end face of the matching part of the adapter, so that the welding seam is exposed, and the welding quality is influenced. In this embodiment, the fitting clearance between the bellows connecting section and the adaptor and the fitting clearance between the bellows connecting section and the adaptor are respectively: the length of the fit clearance between the corrugated pipe connecting section and the adapter piece is more than 2 times of the wall thickness of the corrugated pipe connecting section, and the length of the fit clearance between the external pipe joint section and the adapter piece is more than 2 times of the wall thickness of the external pipe joint section. In one embodiment, these fit-together gaps are 0.025mm to 0.15mm and the length of the fit-together gap is 5mm to 15mm, which makes the soldering relatively reliable and ensures that the solder penetrates as intended.

The welding mode is characterized in that: the weld seams are located between the outer walls of the respective

bellows connection sections

12a, 12b, the outer walls of the

outer joint sections

5, 6 and the adapter mating portions of the respective adapters 3a, 3b inner chambers, i.e. the weld seams are located inside the adapters. The exposed area of the welding seam is relatively small, the welding seam is positioned in the damping tube, and fluid media (such as refrigerant flowing in the refrigerating system) can be inside the welding seam in the actual use process, so that the welding seam is not exposed in the air, and the potential difference corrosion of the welding seam and the air is reduced; meanwhile, the whole damping tube can be welded only once, so that multiple welding of the corrugated tube, the external connecting tube and the corresponding adapter is avoided compared with flame brazing, and the welding seam consistency is good; due to the two factors, the welding quality of the shock absorption tube is effectively improved, and the connection between product parts is more reliable. In addition, the integral welding also simplifies the welding process and improves the efficiency.

As shown in fig. 3 and 4, a simplified shock tube assembly is provided. As described above, the embodiment of fig. 1 and 2 integrally welds a bellows 1, two adapters 3a and 3b and two

external pipe connectors

5 and 6 to obtain a complete shock tube assembly. It will be understood that in the actual production process, it may be necessary to weld together only one bellows 1 and two adapters 3a, 3b as described above, thereby forming a simplified assembly, as shown in fig. 3 and 4. After the simplified shock absorption pipe assembly is manufactured, the simplified shock absorption pipe assembly can be further welded with a compressor, a circulating pipeline or other corresponding pipe fittings in occasions needing shock absorption in a refrigeration system to achieve a corresponding shock absorption effect, and details are not repeated. In addition, one side of the corrugated pipe can be welded with the adapter and the external connecting pipe, and the other side of the corrugated pipe is fixedly welded with the corresponding adapter.

As shown in fig. 5 to 7, the corrugated tube 1 is preferably made of stainless steel material, and includes a corrugated tube main body section 11 and a corrugated tube connection section 12, wherein: the bellows main body section 11 has more than two expansion joints, and can compensate the expansion deformation of the pipe due to temperature change, wherein the parameters such as the bellows inner diameter D1, the bellows outer diameter D2, the wave thickness t, the wave distance q and the like need to be determined according to the external system elements. One option for bellows 1 in this embodiment is: the pipe diameter of an external system is 1/2 inches, the waveform of the corrugated pipe can be U-shaped or omega-shaped, the total length is 225mm, the pipe diameter is 12A, the pipe length is 151mm, the wall thickness of the corrugated pipe is 0.2 +/-0.01 mm, the inner diameter D1 of the corrugated pipe is 12 +/-0.2 mm, the outer diameter D2 of the corrugated pipe is 18 +/-0.2 mm, the wave height is 3.0mm, the wave thickness is 2.0 +/-0.15 mm, the wave thickness t is 2.0 +/-0.15 mm, and the wave distance q is 3.0 +/-0.15 mm, so that a satisfactory damping and silencing effect is obtained; of course, other parameters can be set according to the overall performance index of the external system. Here, the

bellows connection sections

12a, 12b are respectively located at both ends of the bellows main body section 11, and can be connected to the

outer tube

5, 6 after the adapters 3a, 3b are installed; or directly with other external devices in the refrigeration system.

It will be appreciated that the bellows 1 may be somewhat telescopic in use and may be damaged when the telescopic stroke is too great. The corrugated pipe 1 can be also provided with a woven mesh pipe 2 which can be a stainless steel woven mesh in particular, and has better strength and toughness, so that the purpose of protecting the corrugated pipe 1 can be achieved; of course, the woven pipe network may be replaced by other types of protective nets, such as aluminum alloy protective nets and the like. As shown in fig. 1 to 4, the woven mesh tube 2 is sleeved on the main bellows body section 11, and the end of the woven mesh tube is fixed with the adapters 3a and 3b, so that the bellows 1 of the shock absorbing tube can be prevented from stretching beyond a certain range. Specifically, the outer walls of the adapters 3a, 3b are respectively provided with an adapter outer wall groove 33 (see fig. 8, 9), wherein the woven mesh tube 2 can be pressed against the adapter outer wall groove 33 by inserting the pressing rings 4a, 4 b. The assembly mode of the woven net pipe 2 is simple to operate and good in structural reliability. The pressing rings 4a and 4b are pressed to fix the woven mesh pipe and the adapter in a crimping mode, and welding is not needed any more, so that the problem that welding seam defects possibly occur due to repeated welding of original welding positions is solved.

As shown in fig. 8 to 9, the adaptor 3 is specially designed for the shock tube of the present invention. Each adapter 3 comprises an adapter body 31 for connecting the bellows 1 to the extension tube 5 or the extension tube 6. The adaptor body 31 may be made of stainless steel or red copper, and may be obtained by turning the blank or formed by molding. The adaptor body 31 has an adaptor inner cavity 32, the adaptor inner cavity 32 is communicated with the inner cavity of the corrugated pipe 1 and the inner cavity of the corresponding external connecting

pipe

5 or 6, and two end parts of the adaptor inner cavity 32 are respectively provided with an adaptor matching part 321 and an adaptor matching part 322 to correspondingly weld the corrugated pipe 1 and the external connecting

pipe

5 or 6. Preferably, the welding fit length between each bellows connecting section and the corresponding adapter fitting part is more than 1/3 of the outer diameter of the bellows connecting section, and the welding fit length between each external pipe joint section and the corresponding adapter fitting part is more than 1/3 of the outer diameter of the external pipe joint section, so that the length of a welding seam is prolonged, and the welding strength is increased. Of course, the fitting length of these pipe fittings can be adjusted in a corresponding range, and will not be described in detail.

Above-mentioned adaptor 3 is favorable to improving welding quality when welding with bellows 1 and

external pipe

5 or 6, and its reason lies in: when the corrugated pipe 1 and the corresponding

external pipe

5 or 6 are arranged in the corresponding pipe adapter matching part 321 and the corresponding adapter matching part 322 for welding, the welding seams of the corrugated pipe 1 and the corresponding

external pipe

5 or 6 are positioned between the outer wall of the joint section of the corresponding corrugated pipe connecting section 12, the external pipe 5 or the external pipe 6 and the adapter matching parts on two sides of the inner cavity 32 of the adapter, and the welding seams hardly overflow out of the end surface of the inner cavity 32 of the adapter, so that the exposed area of the welding seams is avoided or reduced, and the welding seams are positioned in the pipe, so that the influence of potential difference corrosion is avoided or reduced, and the reliability of pipe connection is improved.

Bellows linkage segment 12, external pipe 5 or external pipe 6 and the corresponding adaptor cooperation portion of adaptor inner chamber 32 between can be clearance fit, also can be for main part transition fit's mode in addition, can adopt modes such as stove welding to weld from this, specifically: placing the solder on the inner cavity solder placing part of the adapter 3 in advance, then assembling the external connecting pipe, the corrugated pipe 1 and the inner cavity matching part of the adapter 3 in a matching way, and then performing furnace welding on the whole assembly through a welding furnace or a welding chamber, or fixing the whole assembly on a tool and performing furnace welding through the welding furnace or the welding chamber. After the solder is melted, the solder flows into the joint surfaces of the adapter fitting portion 321 and the external connection pipe, and the joint surfaces of the adapter inside fitting portion 322 and the corrugated tube 1 by capillary action, thereby achieving welding fixation.

Specifically, the position of the solder placing portion of each adapter 3 is as shown in fig. 8 and 9, wherein an adapter inner boss 323 is disposed in the middle of the adapter inner cavity 32, the adapter inner boss 323 protrudes from the adapter inner wall, the protruding height of the adapter inner boss 323 may be slightly greater than or equal to the wall thickness of the external connection pipe, or the protruding height of the adapter inner boss 323 may be slightly greater than or equal to the wall thickness of the bellows connection section. The two ends of the adapter inner boss 323 serve as placement portions for placing solder, which can flow into the joint surface gap between the outer wall of the bellows joint section 12 and the adapter inner cavity 32 after melting.

It will be appreciated that the same applies to the

extension tube

5 or 6 and the adapter 3. Specifically, the adaptor inner cavity 32 is provided with an adaptor inner boss 323 between the adaptor outer side matching portion 321 and the adaptor inner side matching portion 322, and the height of the adaptor inner boss 323, the wall thickness of the external pipe joint section and the wall thickness of the connecting section of the corrugated pipe 1 may be consistent, where consistent means that the difference between the two is not more than 10%. Therefore, the difference between the equivalent inner diameter of the external connecting pipe, the equivalent inner diameter of the boss in the adapter and the equivalent inner diameter of the corrugated pipe is not more than 10 percent, so that the drift diameter of the whole damping pipe is not changed, and adverse effects on fluid movement are prevented. At this time, the two ends of the adaptor inner boss 323 are respectively used as a solder portion 324 and a solder portion 325, so that solder (generally, solder rings) can be correspondingly placed to weld the adaptor fitting portion 321 and the

external connection pipe

5 or 6, and the fitting portion joint surface between the adaptor fitting portion 322 and the bellows 1, thereby integrating the

external connection pipe

5 or 6 and the bellows 1 via the adaptor 3.

As mentioned before, the above shock tube may be provided with a woven mesh tube 2 to prevent damage. In one embodiment, the woven mesh tube 2 is a stainless steel woven mesh sleeve, the weaving angle is 40-60 degrees, the coverage rate is 75-95 percent, and the strength and the toughness are ideal. The woven mesh tube 2 is not welded when being fixed, and therefore, the adaptor 3 is also subjected to adaptive transformation in the embodiment. As shown in fig. 8 and 9, in manufacturing the adaptor body 31, an adaptor outer wall groove 323 may be machined on the outer wall of the blank, and the adaptor outer wall flange 311 and the adaptor outer wall flange 322 are formed on both sides of the adaptor outer wall groove 323. In other words, a first adaptor outer wall flange 311 and a second adaptor outer wall flange 322 may be respectively disposed at two ends of the outer wall of the adaptor body 31, and an adaptor outer wall groove 323 is formed between the first adaptor outer wall flange 311 and the second adaptor outer wall flange 322. The outer wall groove 323 of the adapter is used for accommodating the clamping rings 4a and 4b, the woven mesh tube 2 configured on the corrugated tube 1 can be fixedly arranged in the outer wall groove 313 of the adapter by extruding the blank body of the clamping ring 4, wherein the end surface of the blank body 41 of the clamping ring is tightly combined with the inner side surfaces of the flange parts at two sides of the outer wall groove 33 of the adapter, so that the compression friction force is increased to fix the woven mesh tube 2. The woven net pipe fixing mode avoids weld defects because welding is not needed. In addition, the adaptor body 31 may be provided with an adaptor outer wall flange 311 at one end of the outer wall, i.e. the end relatively close to the bellows, and the other end may be selected whether or not to provide the adaptor outer wall flange. In addition, other woven net pipe fixing parts such as net clamps and the like can be selected for fixing.

As shown in fig. 8 and 9, the first adapter outer wall flange 311 and the second adapter outer wall flange 312 may be respectively provided with a chamfer, wherein: a peripheral chamfer 3111 is formed 1/4 on the outside of the first adapter outer wall flange 311 to facilitate the insertion of the clamping ring 4 from this position; the outer side of the second adapter outer wall flange 3121 is provided with a semicircular chamfer portion 3121, so that the braided mesh tube 2 can not be damaged when covered at the position, or the inner side and the outer side of the second adapter outer wall flange 3121 can be provided with a chamfer portion 3121 or a smooth transition portion or a smooth transition structure, so as to protect the braided mesh tube 2.

As mentioned above, when the shock-absorbing tube of the present invention is assembled, the external connection tube and the corrugated tube 1 are press-fitted into the fitting portions at the two ends of the adaptor 3 for welding. For the convenience of press fitting, the problem of setting a guide can be considered. As shown in fig. 8 and 9, the outer end of the adapter outer side fitting portion 321 is provided with a guide surface 326, so that the external connection tube can be conveniently pressed on the adapter fitting portion 321; for the same reason, the outer end of the inner side matching portion 322 of the adaptor may also be provided with a corresponding guide surface to enable the

external connection tube

5 or 6 to be smoothly press-fitted, which is not labeled in fig. 8 and 9, and therefore, the description thereof is omitted here.

In the refrigerating system, the corrugated pipe 1 and the external pipe 5 are respectively pressed into the corresponding adapter matching part of the adapter 3 on one side, the corrugated pipe 1 and the external pipe 6 are respectively pressed into the corresponding adapter matching part of the adapter 3 on the other side, and then welding is carried out, wherein the corrugated pipe 1 and the corresponding adapter 3, the external pipe 5 and the matching parts between the external pipe 6 and the corresponding adapter 3 are respectively matched, and solder can flow to the matching part joint surface between the corresponding pipe fitting and the adapter 3 to realize welding after being melted. In order to facilitate assembly and ensure welding quality, the structure of the external connecting pipe and the corrugated pipe 1 needs to be optimized.

As shown in fig. 1 and 2, the shock absorbing tube of the present invention is provided with an outer tube 5 and an outer tube 6, and it can be understood that only one outer tube may be provided in some cases. The following describes the assembly relationship between the extension tube 5 and the extension tube 6 and the adaptor 3 with reference to fig. 10 to 15. It will be appreciated that the bellows 1 may also be similarly constructed and assembled.

As shown in fig. 10 to 12, the external connection tube 5 may be a copper tube such as a copper straight tube or a copper bent tube, one end of the external connection tube body 51 to be welded is provided with an external connection tube joint section 52, and an end of the external connection tube joint section 52 is provided with an external connection tube joint section guide surface 54, wherein a guide angle (a bus included angle between a bus of the external connection tube joint section guide surface 54 and a bus of an outer wall of the external connection tube body 51) α is about 10 °, so that the external connection tube 5 is conveniently press-fitted into a corresponding fitting portion of the adaptor body 31. In addition, the extension tube 5 in fig. 10 may need to be provided with a flared portion according to the difference of the access element in the extension system.

As shown in fig. 10-12, a transition fit may be employed between the male coupling segment 52 and the mating portion of the adaptor body 31. In order to improve the fluidity of the solder when melting and ensure the welding quality, a plurality of axially extending external pipe outer wall grooves 53 are arranged on the outer wall of the external connecting pipe joint section 52, and can be formed in a wire drawing or thread rolling or extrusion mode, the number of the grooves can be 2-3.5 times of the pipe diameter unit number (unit: mm) of the external connecting pipe, and the specific number can be determined according to the width and the size of the external connecting pipe. In addition, the width and depth of the outer wall groove 53 can be between 0.025mm and 0.15mm, preferably between 0.05mm and 0.12mm, and the cross section of the shape can be semicircular, arc-shaped, trapezoid, square or V-shaped; the outer wall grooves 53 of the outer connecting pipe can enable the solder to have better fluidity, thereby better ensuring the welding quality.

Of course, the external pipe outer wall groove 53 may also be implemented by means of external pipe outer wall ribs (not shown) formed by wire drawing, and the shape, specification and arrangement thereof may be similar to those of the external pipe outer wall groove 53. The convex rib parts are in relatively tight fit with the adapter, and the flow of the solder can be realized at the positions between the adjacent convex rib parts, so that the solder has better fluidity during welding. Therefore, the external connecting pipe and the adapter can be relatively fixed or limited without the aid of an external tool. External pipe, adaptor no longer need be with the help of outside frock promptly, just can realize reliable welding, no longer give unnecessary details. It will be appreciated that the outer wall bead may be replaced by other forms of protrusion.

As shown in fig. 14 to 16, the other extension tube 6 is a straight copper tube with a flared portion 65. The external pipe body 61 is also provided with an external pipe joint section 62, the end of the external pipe joint section 62 is provided with an external pipe joint section guide surface 64, and the guide angle beta (the included angle between the bus of the external pipe joint section guide surface 64 and the outer wall of the external pipe body 61) is about 10 degrees; in addition, a plurality of external tube outer wall grooves 63 or external tube outer wall convex ribs or combinations thereof are axially arranged on the outer wall of the external tube joint section 62, and the number of the external tube outer wall grooves or external tube outer wall convex ribs can be 2-3.5 times of the number of pipe diameter units (unit: mm) of the external tube 6, so that the solder can be ensured to have better fluidity between the external tube 6 and the corresponding adapter matching part 321. Other external tube structures that can refer to fig. 12-14 are not described again. In addition, the extension tube 6 in fig. 12 may not be provided with a flared portion depending on the extension member.

Incidentally, the above structure can be adopted when the corrugated pipe 1, the external connecting pipe 5 and the external connecting pipe 6 are square pipes; accordingly, the adaptor 3 is not limited to a circular tube. In addition, the external connection pipe 5 and the external connection pipe 6 are not limited to straight pipes, and if they are integrally bent pipes (the matching portion is the external connection pipe), the connection can also be performed in the above manner, and the damper pipe at this time also has higher connection reliability, and will not be described herein again.

As shown in fig. 16, the pressing ring 4 of the present invention may be made of a material (e.g., copper or stainless steel) satisfying the hardness and ductility requirements. Specifically, the material is made into an annular clamping ring blank 41, and the size of an inner hole 42 of the annular clamping ring blank is slightly larger than the maximum outer diameter of a side flange of the adaptor outer wall groove 33. The assembly mode is as follows: after the corrugated pipe 1, the adapters 3a and 3b and the

external tubes

5 and 6 are welded, the braided net pipe 2 wraps at least most parts of the corrugated pipe 1 and the adapters 3 at two ends, at least the braided net pipe 2 wraps the outer wall groove of the adapters, the blank 41 of the clamping ring is sleeved at the outer wall groove 33 of the adapters 3 and is sleeved at the braided net pipe, the blank 41 of the clamping ring is extruded to be reduced, the adapter forms the clamping ring 4 for fixing the braided net pipe 2, and therefore the shock-absorbing pipe kit with the braided net pipe 2 is obtained. Here, the woven mesh tube 2 may be a stainless steel woven mesh sleeve, the weaving angle is 40 to 60 degrees, and the coverage rate is 75 to 95 percent.

It is easy to understand that the end of the clamping ring blank 41 is pre-provided with an inner guide surface 43 when processing the clamping ring blank 41, so that the clamping ring blank 41 can be easily and smoothly installed in the adaptor outer wall groove 33 of the adaptor 3. The assembly mode of the woven net pipe 4 omits a welding procedure, so that the operation is simpler, and the structural reliability is higher. Here, the outer wall groove 33 is used to install the woven mesh tube 2, but other forms of structures can be used as the holding part of the woven mesh tube, and the holding part can provide suitable friction and extrusion force for the woven mesh tube 2, thereby achieving the purpose of reliably installing the protective mesh woven mesh tube 2. Similar structures can be adopted for the protective nets in other structural forms.

In the above embodiment, the corrugated tube 1 and the woven mesh tube may be made of stainless steel, the external connection tube 5, the external connection tube 6 and the adaptor may be made of copper, thus, the shock absorbing tube can be used in the situation that the main material of the system is copper material, the welding material between the corrugated tube 1 and the adapter 3, and between the external connecting

tube

5 or 6 and the adapter 3 can be the same material such as bronze solder, for example, tin bronze solder in one specific embodiment, the melting point of the solder can reach about 1000 ℃, for example, the melting point is generally over 980 ℃, can better meet the welding requirement of stainless steel and copper, in addition, the melting point temperature of the solder is higher than that of common copper-based solder such as phosphor copper solder, even if the shock tube needs to be welded and fixed with the system subsequently, the influence of subsequent welding on the shock tube is small because the melting point temperature of the solder of the shock tube is about 180 degrees higher. In addition, the corrugated pipe can also be made of copper. Of course, the bellows 1, the adaptor 3 and the external connection pipe may also be made of different material combinations, and it should be noted that other suitable welding materials may be selected, for example: when aluminum alloy and stainless steel or steel are welded, the welding material can be more than 2 of aluminum, nickel alloy, titanium alloy, copper alloy and silver, and the details are not repeated.

In one embodiment, the adapter is made of red copper, and correspondingly the clamping ring 4 is made of red copper, so that the clamping ring 4 is fixed relatively reliably. In addition, the shock absorbing tube in this specification may also be referred to as a shock absorbing tube or a shock absorbing tube.

In another embodiment, the corrugated tube 1 and the woven mesh tube may be made of stainless steel, and the external connection tube 5, the external connection tube 6 and the adaptor may be made of aluminum, so that the shock absorption tube may be used in the case where the main material of the system is aluminum.

The shock absorbing tube of several embodiments of the present invention has been described, and may be typically used in the pipeline of air conditioners, refrigerators, automobile air conditioning systems, etc. The shock absorption pipe is used for connecting a compressor and a circulating pipeline of a refrigerating system pipeline, so that a shock absorption effect can be better achieved.

The shock absorbing tube structure of the embodiment of the present invention is explained above, and on this basis, a shock absorbing tube manufacturing method will now be described.

Referring to fig. 17, a method of manufacturing a shock-absorbing tube according to an embodiment of the present invention is shown. The manufacturing method of the shock absorbing tube comprises the following steps: the method comprises the following steps of a component pretreatment process, a solder placing process, a pipe fitting assembling process, a woven net pipe mounting process, a finished product treatment process and the like, wherein the specific operation steps and functions of each process are as follows.

1. Part pretreatment Process

The step obtains parts meeting the requirements, such as corrugated pipes, adapters, external pipes and the like. These components should meet the following requirements: the corrugated pipe comprises a corrugated pipe main body at the middle part, and at least one end of the corrugated pipe main body is provided with an axially extending corrugated pipe connecting section; the adaptor has the adaptor inner chamber, and the middle part of adaptor inner chamber sets up solder portion, and the both ends of adaptor inner chamber set up adaptor cooperation portion, in addition, still should include other structures in the aforementioned bellows, no longer gives details. These components may be self-processing or may be purchased externally.

In particular, the component preparation step can be omitted as in the case of outsourcing, which is performed from the outside, and specifically includes the treatment of the bellows, the adapter and the extension tube, as described below.

The preparation of the corrugated pipe comprises the procedures of blanking, chamfering, finishing, ultrasonic cleaning and the like of a raw material of the corrugated pipe, and the procedures can adopt conventional procedures to obtain the corrugated pipe meeting the requirements after the procedures are completed.

The adaptor processing procedure comprises the step of processing the adaptor blank into a corresponding adaptor inner cavity, an adaptor inner boss and an adaptor outer wall groove, so that the adaptor meeting the requirements is obtained, and the adaptor can be better used as an adaptor carrier to connect the corrugated pipe and an external pipe.

The external pipe treatment process comprises the steps of external pipe raw material blanking, chamfering, wire drawing and ultrasonic cleaning, and the external pipe meeting the requirements is obtained. Generally, these extension tubes may be determined as desired for the flaring process.

In addition, the pretreatment process of the parts also needs the processes of blanking, ultrasonic cleaning and the like for the woven mesh pipe; blanking the pressing ring blank, and carrying out ultrasonic cleaning and the like; and so on. After these operations are completed, other manufacturing processes of the entire damper tube can be performed, which will be described below.

2. Solder placing process

The process puts the solder in the solder part of the inner cavity of the adapter in advance. The melting point temperature of the solder used is about 800 ℃, but in order to ensure that the welding of the shock absorption tube is more reliable, the solder with the temperature not lower than 980 ℃ such as bronze solder can be selected.

3. Pipe fitting assembling process

After the above-mentioned work is completed, i.e. after the solder is placed, the pipe assembly can be assembled, and the adapter, the corrugated pipe and the external connecting pipe are assembled into an integrated pipe assembly so as to implement the next few welding. The corrugated pipe assembly comprises a corrugated pipe, an adapter, an external pipe and the like, wherein the corrugated pipe and the adapter are matched with each other at an adapter matching part, the adapter and the external pipe are matched with each other at another adapter matching part, so that the adapter, the corrugated pipe and the internal cavity of the external pipe are communicated, if the corrugated pipe and the adapter, the adapter and the external pipe are in transition fit or interference fit, the three parts are not required to be fixed by an external tool, and if the three parts are in clearance fit, the external tool can be used for fixing and limiting to obtain the pipe assembly. The specific assembly method can be one of the following methods:

assembling the corrugated pipe, the external pipe and the adapter into a whole, and fixing or limiting in a dotting fixing mode or a mode of arranging a convex part on one of the corrugated pipe, the external pipe and the adapter to obtain a pipe fitting assembly of the corrugated pipe, the external pipe and the adapter;

assembling the corrugated pipe, the external connecting pipe and the adapter into a whole, and performing primary fixing or limiting in a transition fit mode, and then assembling the corrugated pipe, the external connecting pipe and the pipe fitting of the adapter;

the corrugated pipe and the external pipe are respectively pressed and installed on the adapter in a transition fit mode to be primarily fixed or limited, and the corrugated pipe, the adapter and the pipe fitting assembly of the external pipe are combined. Wherein the fit clearance between bellows linkage segment and adaptor cooperation portion is more than 2 times of bellows linkage segment wall thickness, and the fit clearance between external tube joint section and adaptor cooperation portion is more than 2 times of external tube joint section wall thickness.

The assembly may then be placed in an integrated welding apparatus for welding.

4. Assembly welding process

In this process, the tube assembly is welded to obtain the damper tube body. Specifically, the tube assembly is placed in a welding device for welding, and more specifically, the tube assembly is welded in a tunnel furnace, a vacuum welding chamber, a gas shielded welding chamber or a welding box, and the welding temperature, time and the like are determined according to the device parameters, the main materials of the welded external tube, the welding flux and the like.

5. Net sleeve mounting process

The effect of the installation woven mesh pipe is to prevent the bellows from being damaged in the shock absorption pipe, and the specific process is as follows: sleeving a woven net pipe on the corrugated pipe main body section of the damping pipe main body; in the embodiment, the end part of the woven mesh pipe is arranged in the groove on the outer wall of the adapter; the woven net pipe fixing piece fixes the end part of the woven net pipe in the groove of the outer wall of the adaptor to obtain the shockproof pipe. The fixing mode of the woven network management can be as follows: and sleeving a pressing ring blank body at the end part of the woven net pipe, extruding the pressing ring blank body to deform the pressing ring blank body so as to tightly press and fix the end part of the woven net pipe in a groove on the outer wall of the adapter, so that the net sleeve can be fixed without welding, and the shockproof pipe finished product with the protection effect is obtained. In addition, the groove on the outer wall of the adapter can be replaced by other structures, such as a mode that a convex part is arranged on one side, close to the corrugated pipe, of the adapter.

6. Finished product processing procedure

The working procedure is optional, and after the shockproof tube is obtained, the shockproof tube can be further tested, dried, shaped and packaged to obtain a factory product of the shockproof tube. The finished shockproof tube is welded in a one-time furnace by adopting the corrugated tube, the adapter and the external tube, the product has relatively good straightness and relatively reliable weld joint connection, and the weld joint is positioned on the inner side of the shock absorption tube, so that the shockproof tube is beneficial to the service life of the product.

While the present invention has been described in detail and with reference to the embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit of the invention, and it is intended to cover all such changes and modifications as fall within the scope of the appended claims.

Claims

1. A method for manufacturing a shock absorption tube comprises a corrugated tube, an adapter and an external connection tube, wherein: the corrugated pipe comprises a corrugated pipe main body at the middle part, and is characterized in that at least one end of the corrugated pipe main body is provided with an axially extending corrugated pipe connecting section; the adaptor has an adaptor inner cavity, the adaptor includes an adaptor inner boss, two ends of the adaptor inner boss place solder as placing parts, two ends of the adaptor inner boss set up adaptor matching parts, the shock absorbing tube manufacturing comprises the following procedures:

a solder placing procedure: placing solder on a placing part of the inner cavity of the adapter;

a pipe fitting assembling process: assembling the corrugated pipe, the adapter and the external pipe together, so that the corrugated pipe is matched and fixed or limited with the adapter matching part on the corresponding side, and the external pipe is matched and fixed or limited with the adapter matching part on the corresponding side of the adapter, so that the inner cavity of the adapter is communicated with the inner cavity of the corrugated pipe and the inner cavity of the external pipe to obtain a pipe assembly;

and (3) assembly welding procedure: and welding the pipe fitting assembly comprising the corrugated pipe, the adapter and the external connecting pipe in an integrated furnace to obtain a damping pipe main body, wherein the welding in the furnace is to perform integrated welding on the pipe fitting assembly in a tunnel furnace or a vacuum welding box or a gas shielded welding box.

2. The manufacturing method of the shock absorbing tube as claimed in claim 1, wherein the fixing or limiting manner of the bellows and the adaptor is that at least part of the fitting parts of the bellows and the adaptor are relatively fixed in a transition fitting manner, and the fixing or limiting manner of the adaptor and the extension tube is that at least part of the fitting parts of the adaptor and the extension tube are relatively fixed in a transition fitting manner; at least part of the matching parts of the corrugated pipe and the adapter are in clearance fit, and at least part of the matching parts of the external connecting pipe and the adapter are in clearance fit.

3. The method for manufacturing a shock absorbing tube according to claim 1, wherein the melting point temperature of the solder used in the solder placing process is not lower than 980 ℃.

4. The method for manufacturing the shock absorbing tube according to claim 1, wherein in the tube assembling process, the corrugated tube, the external connection tube, the adapter and the solder are assembled into a tube assembly, and the tube assembly has no tool for fixing the corrugated tube, the external connection tube and the adapter.

5. The method for manufacturing a shock absorbing tube according to claim 1, wherein in the tube assembly process, the bellows, the external tube and the adaptor are assembled into a whole, and a tube assembly of the bellows, the external tube and the adaptor is obtained by fixing or limiting in a dotting fixing manner or in a manner that a convex portion is provided on one of the bellows, the external tube and the adaptor.

6. The shock absorbing tube manufacturing method as set forth in any one of claims 1 to 5, wherein after the component welding process, the shock absorbing tube manufacturing method further comprises a following mesh-mounting process, the mesh-mounting process comprising the steps of:

and (3) a protective net sleeving procedure: sleeving a protection net and a protection net fixing piece on the corrugated pipe main body section of the damping pipe main body, enabling the end part of the protection net to be located at the corresponding matching part of the adapter piece, and sleeving the protection net fixing piece on the end part of the corresponding protection net;

and a protective net fixing procedure: the protecting net fixing piece is deformed in an extruding or clamping mode, and the end part of the protecting net is fixed with the corresponding part of the adapter piece through the deformation of the protecting net fixing piece.

7. The manufacturing method of the shock absorbing tube as claimed in claim 6, wherein the protecting net fixing member is a blank pressing ring before assembling, the adaptor is provided with an adaptor outer wall groove, and the protecting net fixing process comprises the following steps:

sleeving a pressing ring blank body at the end part of the protective net;

and extruding the pressing ring blank to deform the pressing ring blank so as to tightly press and fix the end part of the protective net on the groove on the outer wall of the adaptor.

8. The method for manufacturing a shock-absorbing tube as set forth in claim 7, wherein said protecting net installing process further includes a finishing process, said finishing process including:

and testing, drying, shaping and packaging the semi-finished product of the shock absorption tube to obtain a finished product of the shock absorption tube.

9. The damper pipe manufacturing method according to claim 8, wherein the solder placing process is preceded by a component processing process including:

a corrugated pipe treatment process: the method comprises the steps of blanking raw materials of the corrugated pipe, chamfering, finishing and ultrasonically cleaning to obtain the corrugated pipe meeting the requirements;

and (3) processing procedures of the adaptor: processing a corresponding adaptor inner cavity, adaptor inner boss and adaptor outer wall groove on a adaptor blank to obtain the adaptor meeting the requirements;

an external connection pipe treatment process: the method comprises the steps of blanking raw materials of the external connecting pipe, chamfering, drawing, and ultrasonically cleaning to obtain the external connecting pipe meeting the requirements.

10. A shock absorbing pipe manufactured by the method as claimed in any one of claims 1 to 9, comprising a bellows, wherein the bellows comprises a bellows body at a middle portion thereof, at least one end of the bellows body is provided with a bellows joint section extending in an axial direction, an adapter is welded to the bellows joint section, and the adapter is welded to an external pipe at the same time, wherein the adapter has an adapter inner cavity communicating with the bellows inner cavity and the external pipe inner cavity, adapter fitting portions are respectively provided at both ends of the adapter inner cavity, the bellows is fixed or limited in cooperation with the adapter fitting portions at respective sides, the external pipe is fixed or limited in cooperation with the adapter fitting portions at respective sides of the adapter, and the adapter fitting portions include an adapter outer side fitting portion and an adapter inner side fitting portion, the adapter still includes the boss in the adapter, and this boss is located between adapter outside cooperation portion and the inboard cooperation portion of adapter in the adapter, the solder is placed as placing the portion respectively at the both ends of the boss in the adapter, bellows linkage segment with outer adapter coupling section socket joint respectively in corresponding side adapter cooperation portion welding, bellows, adapter, outer pipe assembly are in the same place and through stove welding fixed as an organic whole.

11. The shock absorbing tube according to claim 10, wherein the shock absorbing tube comprises a protective net, a middle body of the protective net is sleeved on the corrugated tube body, two ends of the protective net are fixed with the adaptor through protective net fixing pieces, and the two ends of the protective net are fixed with the adaptor through the protective net fixing pieces in a squeezing or clamping manner.