Connecting pipe
By controlling the outer diameter and thickness of the upset wave in the connecting pipe within a reasonable range, the problem of non-standard upset wave size design was solved, and the complete forming of the upset wave and the improvement of sealing performance were achieved.
Patent Information
- Application Number
- CN202511807821.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-03
- Publication Date
- 2026-01-16
AI Technical Summary
The existing design of the upset corrugation dimensions of connecting pipes is not standardized, which can easily lead to problems such as the inability to form the correct dimensions or high forming costs.
By setting the outer diameter D1 and thickness T1 of the first upset wave to satisfy the relationship D1≤(2*d)mm,(2*n*t-0.1)mm≤T1≤(2*n*t+0.2*k1*n)mm, the outer diameter and thickness of the first upset wave are controlled within a reasonable range to ensure the integrity of the forming.
To prevent the upset wave outer diameter from being too large or too small, which would make processing difficult or increase molding costs, to avoid defects such as upsetting wave cracking or uneven end faces, and to improve molding quality and sealing performance.
Smart Images
Figure CN121346084A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of pipeline connection, in particular to a connecting pipe. BACKGROUND
[0002] The connecting pipe as a connecting device in the pipeline system is widely used in life and industrial manufacturing.
[0003] In the related art, the pipe opening of the connecting pipe is usually provided with a upsetting wave. When the connecting pipe is installed, the nut is fixed by the upsetting wave, and the fixing of the connecting pipe and other components is realized by thread connection. However, the size of the upsetting wave of the connecting pipe is not standardized, which may cause problems such as unformed size or high forming cost. SUMMARY
[0004] The present application provides a connecting pipe. By setting the outer diameter D of the first upsetting wave and the thickness T of the first upsetting wave within a reasonable range, on the one hand, it can prevent the outer diameter D of the first upsetting wave from being too large or too small, which may cause difficult processing or high forming cost. On the other hand, by controlling the thickness T of the first upsetting wave, the integrity of the first upsetting wave can be ensured, and defects such as cracking or uneven end face of the first upsetting wave can be avoided.
[0005] In order to achieve the above purpose, the main technical scheme adopted by the present application includes: In a first aspect, the present application provides a connecting pipe, comprising: a pipe body; a first upsetting wave extending circumferentially along the outer circumferential surface of the pipe body; wherein the outer diameter of the pipe body is d mm, the wall thickness of the pipe body is t mm, the outer diameter of the first upsetting wave is D1 mm, the thickness of the first upsetting wave in the extension direction of the pipe body is T1 mm, the first upsetting wave comprises n first sub-upsetting waves, and the following relationships are satisfied: D1≤(2*d) mm, (2*n*t-0.1) mm≤T1≤(2*n*t+0.2*k1*n) mm, n≥1, and k1 is a constant.
[0006] According to the connecting pipe provided by the present application, the outer diameter D1 of the first upsetting wave and the thickness T1 of the first upsetting wave satisfy the relationship: D1≤(2*d) mm, (2*n*t-0.1) mm≤T1≤(2*n*t+0.2*k1*n) mm. In this way, the outer diameter D1 of the first upsetting wave and the thickness T1 of the first upsetting wave can be within a reasonable range. On the one hand, it can prevent the outer diameter D1 of the first upsetting wave from being too large or too small, which may cause difficult processing or high forming cost. On the other hand, by controlling the thickness T1 of the first upsetting wave, the integrity of the first upsetting wave can be ensured, and defects such as cracking or uneven end face of the first upsetting wave can be avoided.
[0007] Optionally, the first upset wave includes a first sub-upset wave, satisfying the relationship: (2*t-0.1)mm≤T1≤(2*t+0.2)mm.
[0008] Optionally, the first upset wave includes two first sub-upset waves, satisfying the relationship: (4*t-0.1)mm≤T1≤(4*t+0.3)mm.
[0009] Optionally, the first upset wave is spaced apart from the opening of the tube body along the extension direction of the tube body.
[0010] Optionally, the connecting pipe further includes a second upset wave, which is disposed at the pipe opening of the pipe body and extends circumferentially along the outer peripheral surface of the pipe body.
[0011] Optionally, the second upset wave includes m second sub-upset waves, where m ≥ 1, satisfying: m ≤ n.
[0012] Optionally, the outer diameter of the second upset wave is D2 mm, and the thickness of the second upset wave is T2 mm along the extension direction of the tube body, satisfying: D2≤(1.4*d) mm, 1≤T1 / T2≤7.33.
[0013] Optionally, the second upset wave includes one second sub-upset wave, and the first upset wave includes three first sub-upset waves, satisfying the relationship: (6*t-0.1)mm≤T1≤(6*t+0.5)mm.
[0014] Optionally, the connecting pipe is made of metal. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0016] Figure 1 A schematic diagram of the connecting pipe provided in the first embodiment of this application; Figure 2 A schematic diagram of the connecting pipe provided in the second embodiment of this application; Figure 3 A schematic diagram of the connecting pipe provided in the third embodiment of this application; Figure 4 A schematic diagram of the connecting pipe provided in the fourth embodiment of this application; Figure 5A schematic diagram of the connecting pipe provided in the fifth embodiment of this application; Figure 6 This is a schematic diagram of the connecting pipe provided in the sixth embodiment of this application.
[0017] [Explanation of Labels in the Attached Image] Connecting pipe 100; Pipe body 1; Pipe opening 11; First upset wave 2; First sub-upset wave 21; Second upset wave 3; Second sub-upset wave 31; Nut 200. Detailed Implementation
[0018] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0019] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.
[0020] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.
[0021] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0022] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.
[0023] In this application, "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).
[0024] It should be noted that connecting pipes, as connecting devices in piping systems, are widely used in both daily life and industrial manufacturing.
[0025] In related technologies, the pipe opening of the connecting pipe is usually provided with upset bead. During the installation of the connecting pipe, the upset bead is used to fix the nut, and the threaded connection is used to fix the connecting pipe to other components. However, the current design of the upset bead size of the connecting pipe is not standardized, which can easily lead to problems such as the inability to form the size or the high forming cost.
[0026] Based on this, this application proposes a connecting pipe 100, wherein the outer diameter D1 of the first upset wave 2 and the thickness T1 of the first upset wave 2 satisfy the following relationship: D1≤(2*d)mm, (2*n*t-0.1)mm≤T1≤(2*n*t+0.2*k1*n)mm. This ensures that both the outer diameter D1 and the thickness T1 of the first upset wave 2 are within a reasonable range. On the one hand, it can prevent the outer diameter D1 of the first upset wave 2 from being too large or too small, which would lead to difficult processing or high forming costs. On the other hand, by controlling the thickness T1 of the first upset wave 2, the integrity of the forming of the first upset wave 2 can be guaranteed, and defects such as cracking or uneven end faces that prevent the first upset wave 2 from being formed can be avoided.
[0027] The connecting pipe 100 according to an embodiment of this application is described below with reference to the accompanying drawings.
[0028] like Figures 1-6 As shown, the connecting pipe 100 according to an embodiment of this application includes: a pipe body 1 and a first upset wave 2. The first upset wave 2 is disposed on the outer peripheral surface of the pipe body 1 and extends along the circumferential direction of the pipe body 1.
[0029] The first upset wave 2 can be set at the pipe opening 11 of the pipe body 1. Along the extension direction of the pipe body 1, the first upset wave 2 can be spaced apart from the pipe opening 11 of the pipe body 1. The first upset wave 2 is used to install a nut on one side of the extension direction of the pipe body 1 and to install a sealing ring on the other side.
[0030] Wherein, the outer diameter of the tube body 1 is d mm, the wall thickness of the tube body 1 is t mm, the outer diameter of the first upset wave 2 is D1 mm, the thickness of the first upset wave 2 along the extension direction of the tube body 1 is T1 mm, the first upset wave 2 includes n first sub-upset waves 21, satisfying the following relationship: D1≤(2*d)mm, (2*n*t-0.1)mm≤T1≤(2*n*t+0.2*k1*n)mm, n≥1, k1 is a constant.
[0031] Specifically, to facilitate the installation and fixing of the connecting pipe 100, the connecting pipe 100 is usually provided with a upset corrugated structure, see reference. Figures 1-6 As shown, the connecting pipe 100 consists of a pipe body 1 and a first upset wave 2. The pipe body 1 can be constructed as a straight line or a curved line; no specific limitation is made here. (As shown in Figure 1 and...) Figure 2 As shown, the first upset wave 2, together with the nut 200, is mainly used for fixed assembly with other connecting pipes 100. In related technologies, the first upset wave 2 is extruded and formed on the pipe body 1 using upset wave processing equipment.
[0032] A portion of the tube body 1 is clamped in the mold, while another portion of the tube body 1 is exposed. The exposed portion of the tube body 1 is shortened by compression, thereby forming a first sub-upsetting wave 21 on the outer circumferential surface of the tube body 1. One or more first sub-upsetting waves 21 together constitute a first upsetting wave 2, and each first sub-upsetting wave 21 consists of two layers of walls.
[0033] It should be noted that k1 is determined by factors such as the material of the connecting pipe 100 and / or the number of the first sub-upsetting wave 21. For example, when the connecting pipe 100 is made of copper and the number of the first sub-upsetting wave 21 is 1, k1 can be 1. When the connecting pipe 100 is made of a higher strength material, such as stainless steel, and the number of the first sub-upsetting wave 21 is 1, k1 can also be 1.
[0034] When the connecting pipe 100 is made of copper and there are multiple first sub-upsetting waves 21, k1 is less than 1. When the connecting pipe 100 is made of stainless steel and there are multiple first sub-upsetting waves 21, the extrusion pressure of the press needs to be increased to ensure that the shape of the extruded first sub-upsetting waves 21 meets the basic requirements. In this case, the value of k1 is greater than that of the connecting pipe 100 made of copper and with the same number of first sub-upsetting waves 21. The thickness of the first upsetting wave 2 of the stainless steel connecting pipe is greater than that of the first upsetting wave 2 of the copper connecting pipe.
[0035] To make the thickness of the first upset wave 2 of the stainless steel connecting pipe close to that of the first upset wave 2 of the copper connecting pipe when extruding the same number of first upset waves 21, the pressure of the press needs to be increased.
[0036] Specifically, when the material of the connecting pipe 100 is copper, the extrusion pressure of the press is about 6MPa, and the number of the first sub-upsetting wave 21 is 1, k1 can be equal to 1. When the number of the first sub-upsetting wave 21 is two or three, k1 satisfies: 0.25≤k1≤0.75.
[0037] When the material of the connecting pipe 100 is stainless steel, the extrusion pressure of the press is about 9MPa, and the number of the first sub-upsetting wave 21 is 1, k1 can be equal to 1. When the number of the first sub-upsetting wave 21 is two or three, k1 satisfies: 0.7≤k1≤1.5.
[0038] When there are multiple first sub-upsetting waves 21, since multiple first sub-upsetting waves 21 are formed sequentially, and the first sub-upsetting wave 21 formed in the previous step will increase the strength of the part of the tube body 1 exposed outside the mold, in order to ensure that the end face of the subsequent first sub-upsetting wave 21 in the extension direction of the tube body 1 has sufficient flatness, it is necessary to reduce the upper limit of the first upsetting wave 2 to ensure that the pressure applied by the pressure head to the first upsetting wave 2 is sufficient. At this time, k1 can be less than 1.
[0039] It should be noted that if the dimensions of the first upset wave 2 are not designed in a standardized manner during the processing of the first upset wave 2, problems such as the inability to form the dimensions or high forming costs may easily occur.
[0040] Based on this, in this application, the outer diameter D1 and the thickness T1 of the first upset wave 2 are both set within a reasonable range. The thickness direction of the first upset wave 2 is consistent with the extension direction of the tube body 1. Specifically, refer to... Figure 1 and Figure 2 As shown, the outer diameter of the pipe body 1 is d, the wall thickness of the pipe body 1 is t, the outer diameter of the first upset wave 2 is D1 mm, and the thickness of the first upset wave 2 is T1 mm, satisfying the relationship: (2*n*t-0.1) mm≤T1≤(2*n*t+0.2*k1*n) mm. It can be understood that the units of the outer diameter d of the pipe body 1, the wall thickness t of the pipe body 1, the outer diameter D1 of the first upset wave 2, and the thickness T1 of the first upset wave 2 are all mm.
[0041] The inventors of this application discovered through extensive experiments that the thickness of the first upset wave 2 not only affects the forming quality of the connecting pipe 100, but also affects the sealing performance of the sealing ring.
[0042] Specifically, if the thickness T1mm of the first upset wave 2 is (2*n*t-0.1)mm, then the two layers of the first sub-upset wave 21 are completely fitted together without any gaps between them, and the thickness of each wall is less than the wall thickness of the tube body 1. If the thickness T1mm of the first upset wave 2 is (2*n*t+0.2*k1*n)mm, then the two layers of the first sub-upset wave 21 are spaced apart, with gaps between them.
[0043] If the thickness of the first upset wave 2 is too small, the pressure head will excessively compress the first sub-upset wave 21, causing the thickness of the first sub-upset wave 21 to become thinner, resulting in cracking of the outer periphery of the first sub-upset wave 21. If the thickness of the first upset wave 2 is too large, on the one hand, the first upset wave 2 cannot be placed in the groove of the mold, and on the other hand, the thickness of the first upset wave 2 is too large, indicating that the gap between the two walls of the first sub-upset wave 21 is large. The large gap between the two walls of the first sub-upset wave 21 will affect the flatness of the end face of the first sub-upset wave 21 in the extension direction of the tube body 1, resulting in poor sealing performance of the sealing ring when it is attached to the end face of the first sub-upset wave 21.
[0044] To enable those skilled in the art to better understand this solution, Tables 1 and 2 below provide examples comparing and contrasting the outer diameter D1 and thickness T1 of the first upset wave 2, respectively.
[0045] Table 1. Test results of the outer diameter D1 of the first upset wave 2 As can be seen from Examples 1, 2, 3, 4 and 5 in Table 1, if the outer diameter D1 mm of the first upset wave 2 satisfies the relationship: D1≤(2*d)mm, then the first upset wave 2 can be formed after one upset. If the outer diameter D1 mm of the first upset wave 2 is greater than or equal to twice the outer diameter d of the pipe body 1, then the first upset wave 2 needs to be upset once, then annealed, and finally upset once more before it can be formed. This not only makes the forming difficult, but also requires an additional annealing process, which increases the forming cost.
[0046] Therefore, by setting the outer diameter D1mm of the first upset wave 2 within a reasonable range, it is possible to prevent the outer diameter D1mm of the first upset wave 2 from being too large or too small. This makes the forming process of the first upset wave 2 simpler and avoids situations where the first upset wave 2 is difficult to process or has high forming costs.
[0047] Table 2. Test results of the thickness T1 of the first upset wave 2 It should be noted that in the embodiments shown in the table, the material of the connecting pipe 100 is copper, k1 is 1, and the number n of the first sub-wave 21 is 1.
[0048] As can be seen from Examples 1, 2, 3, 4, and 5 in Table 2, if the thickness T1 of the first upset wave 2 satisfies the relationship: (2*n*t-0.1)mm≤T1≤(2*n*t+0.2*k1*n)mm, then the forming end face of the first upset wave 2 is flat and the forming outer circle is intact. If the thickness T1 of the first upset wave 2 is not within the above protection range, the forming of the first upset wave 2 may result in cracking of the outer circle or unevenness of the end face, which seriously affects the forming effect of the first upset wave 2 and leads to serious forming defects.
[0049] Table 2. Test results of the thickness T1 of the first upset wave 2 It should be noted that in the embodiments shown in the table, the material of the connecting pipe 100 is copper, k1 is less than 1, and the number n of the first sub-wave 21 is 2.
[0050] Therefore, by setting the thickness T1 mm of the first upset wave 2 within a reasonable range, the integrity of the first upset wave 2 can be guaranteed, and defects such as cracking or uneven end faces that prevent the first upset wave 2 from being formed can be avoided.
[0051] In summary, according to the connecting pipe 100 proposed in this application embodiment, the outer diameter of the first upset wave 2 is D1mm and the thickness of the first upset wave 2 is T1mm, which satisfy the following relationship: D1≤(2*d)mm, (2*n*t-0.1)mm≤T1≤(2*n*t+0.2*k1*n)mm. This ensures that the outer diameter D1 and the thickness T1 of the first upset wave 2 are both within a reasonable range. On the one hand, it can prevent the outer diameter D1 of the first upset wave 2 from being too large or too small, which would lead to difficult processing or high forming costs. On the other hand, by controlling the thickness T1 of the first upset wave 2, the integrity of the forming of the first upset wave 2 can be guaranteed, avoiding defects such as cracking or uneven end faces that prevent the first upset wave 2 from being formed.
[0052] In some embodiments of this application, such as Figure 1 As shown, the first upset wave 2 is disposed at the pipe opening 11 of the pipe body 1. That is to say, the first upset wave 2 can be disposed at the pipe opening 11 of the pipe body 1. During the processing of the first upset wave 2, the upset wave processing equipment is used to extrude and form it at the pipe opening 11 of the pipe body 1 to form the first upset wave 2. This allows the first upset wave 2 to be assembled with other components to improve the versatility of the connecting pipe 100.
[0053] In some embodiments of this application, such as Figure 2 As shown, along the extension direction of the tube body 1, the first upset wave 2 is spaced apart from the tube opening 11 of the tube body 1.
[0054] Specifically, according to the connecting pipe 100 Figure 2 Taking the placement direction shown as an example, the upper end of the pipe body 1 is provided with a pipe opening 11. Along the extension direction of the pipe body 1, the first upset wave 2 is set on the upper part of the pipe opening 11 and spaced apart from the pipe opening 11. This arrangement can reserve installation space for the installation of the sealing ring. The first upset wave 2 is set along the circumference of the pipe body 1, that is, in a ring structure. In this way, when the connecting pipe 100 is installed with other components, the first upset wave 2 can effectively prevent the problem of eccentricity, making the connection structure more stable.
[0055] In some embodiments of this application, such as Figure 3 As shown, the first upset wave 2 includes two first sub-upset waves 21, i.e., n≥2. And along the extension direction of the tube body 1, the two first sub-upset waves 21 are arranged in close contact with each other.
[0056] Specifically, the first upset wave 2 can be composed of two first sub-upset waves 21 processed separately by an upset wave processing device. Along the extension direction of the pipe body 1, the two first sub-upset waves 21 are fitted together. It can be understood that, as... Figure 3 As shown, the outer diameters of the two first sub-upsetting waves 21 are the same. Therefore, the outer diameter D1 of the first upsetting wave 2 is the outer diameter of the first sub-upsetting wave 21, and the thickness T1 of the first upsetting wave 2 is the sum of the thicknesses of the two first sub-upsetting waves 21.
[0057] It should be noted that during the processing of the first upset wave 2, since the first upset wave 2 is composed of two mutually fitting first sub-upset waves 21, the processing difficulty is greater. If the size design of the first upset wave 2 is not standardized, it is more likely to cause the problem of the size not being formed.
[0058] Furthermore, the two first sub-upset waves 21 are formed sequentially. After the first first sub-upset wave 21 is processed, the strength of the part of the pipe body 1 located outside the mold increases. When processing the second first sub-upset wave 21, in order to reduce the forming difficulty of the first upset wave 2, the size of D1 can be appropriately reduced. However, the size of D1 should not be reduced too much, which would cause the thickness T1 of the first upset wave to be too large. This would result in an excessively large gap between the two walls of each first sub-upset wave 21. The excessively large gap between the two walls of the first sub-upset wave 21 would affect the flatness of the end face of the first sub-upset wave 21 in the extension direction of the pipe body 1. As a result, when the sealing ring is attached to the end face of the first sub-upset wave 21, the sealing performance of the sealing ring is poor.
[0059] In some embodiments of this application, the first upset wave 2 includes one first sub-upset wave 21, that is, n=1, satisfying the relationship: D1≤(2*d)mm, (2*t-0.1)mm≤T1≤(2*t+0.2)mm.
[0060] Table 3. Test results of the thickness T1 of the first upset wave 2 As can be seen from Examples 1, 2, and 3 in Table 4, if the thickness T1 of the first upset wave 2 satisfies the relationship: (2*t-0.1)mm≤T1≤(2*t+0.2)mm, then the outer circle of the first upset wave 2 is intact. If the thickness T1 of the first upset wave 2 is not within the above protection range, the forming of the first upset wave 2 may result in cracking, uneven end face, irregular outer circle, etc., which seriously affects the forming effect of the first upset wave 2 and leads to serious forming defects.
[0061] In some embodiments of this application, the first upset wave 2 includes two first sub-upset waves 21, i.e., n=2, which satisfy the relationship: (4*t-0.1)mm≤T1≤(4*t+0.3)mm.
[0062] According to some embodiments of this application, the first upset wave 2 includes two first sub-upset waves 21, which satisfy the relationship: (4*t-0.1)mm≤T1≤(4*t+0.3)mm.
[0063] Table 4. Test results of the thickness T1 of the first upset wave 2 As can be seen from Examples 1, 2, and 3 in Table 4, if the thickness T1 of the first upsetting wave 2 satisfies the relationship: (4*t-0.1)mm≤T1≤(4*t+0.3)mm, then the outer circle of the first upsetting wave 2 is intact. If the thickness T1 of the first upsetting wave 2 is not within the above protection range, the forming of the first upsetting wave 2 may result in cracking, uneven end face, irregular outer circle, etc., which seriously affects the forming effect of the first upsetting wave 2 and leads to serious forming defects.
[0064] Therefore, when the first upset wave 2 is composed of two first sub-upset waves 21 that are sequentially attached to each other, by setting the thickness T1 of the first upset wave 2 within a reasonable range, the integrity of the first upset wave 2 can be guaranteed, and defects such as cracking, uneven end face, and irregular outer circle of the first upset wave 2 can be avoided.
[0065] It should be noted that the first upset wave 2, which is composed of two mutually fitting first upset waves 21, can be set at the pipe opening 11 of the pipe body 1, or it can be set along the extension direction of the pipe body 1, so that the first upset wave 2 is spaced apart from the pipe opening 11 of the pipe body 1. In this way, the first upset wave 2 is spaced apart from the pipe opening 11 to reserve installation space for the installation of the sealing ring.
[0066] Along the extension direction of the tube body 1, the first upset wave 2 has two opposing sides, one side for fixing the nut or pin, and the other side for abutting the sealing ring. Therefore, when the first upset wave 2 has two first sub-upset waves 21, in order to make the first upset wave 2 fit better with the sealing ring, the upper limit of the thickness T1 of the first upset wave 2 needs to be limited.
[0067] Meanwhile, since the two first sub-upsetting waves 21 are formed in sequence, the pressure head will inevitably squeeze the already formed first sub-upsetting wave 21 during the forming process, thereby reducing the gap between the two walls of the already formed first sub-upsetting wave 21, and thus the lower limit of the thickness T1 of the first upsetting wave 2 is also limited.
[0068] According to some embodiments of this application, the first upset wave 2 is spaced apart from the pipe opening 11 of the pipe body 1 along the extension direction of the pipe body 1. Thus, along the extension direction of the pipe body 1, one side of the first upset wave 2 can be used to fix the nut, and the other side of the first upset wave 2 also has space for installing the sealing ring.
[0069] In some embodiments of this application, such as Figure 4 As shown, the connecting pipe 100 also includes a second upset wave 3, which is disposed on the outer peripheral surface of the pipe body 1. The second upset wave 3 extends circumferentially along the pipe body 1 and is spaced apart from the first upset wave 2 along the extension direction of the pipe body 1.
[0070] Therefore, along the extension direction of the pipe body 1, the space between the second upset wave 3 and the first upset wave 2 can be used to place the sealing ring, making it convenient to fix the sealing ring.
[0071] It should be noted that since the thickness T1 of the first upset wave 2 satisfies: (2*n*t-0.1)mm≤T1≤(2*n*t+0.2*k1*n)mm, the first upset wave 2 can be stably placed in the mold groove, thereby improving the stability of the second upset wave 3 forming.
[0072] According to some embodiments of this application, the second upset wave 3 includes m second sub-upset waves 31, where m ≥ 1, satisfying: m ≤ n.
[0073] For example, m can be 1 or 2, that is, the second upset wave 3 can include one second sub-upset wave 31 or two second sub-upset waves 31.
[0074] It should be noted that the number of second sub-upsetting waves 31 is no greater than the number of first sub-upsetting waves 21. For example, the number of first sub-upsetting waves 31 and the number of second sub-upsetting waves 21 can both be one or two; or the number of first sub-upsetting waves is two and the number of second sub-upsetting waves is one, or the number of first sub-upsetting waves is three and the number of second sub-upsetting waves is one.
[0075] Since the strength of the portion of the pipe body 1 extending outside the mold increases after the first upset wave 2 is formed, in order to reduce the forming difficulty of the second upset wave 3, the number of the second sub-upset waves 31 is no greater than the number of the first sub-upset waves 21, thereby improving the yield of the connecting pipe 100. In addition, the function of the second upset wave 3 is only to restrict the movement of the sealing ring, so the number does not need to be too large.
[0076] According to some embodiments of this application, the outer diameter of the second upset wave 3 is D2 mm, and the thickness of the second upset wave 3 along the extension direction of the tube body 1 is T2 mm, satisfying: D2 < (1.4*d) mm, 1 ≤ T1 / T2 ≤ 7.33.
[0077] First, since the strength of the part of the tube body 1 that extends out of the mold increases after being formed by the first upsetting wave 2, the outer diameter D2 of the second upsetting wave 3 is reduced so that the outer diameter D2 of the second upsetting wave 3 satisfies: D2≤(1.4*d)mm, thereby reducing the forming difficulty of the second upsetting wave 3.
[0078] In addition, since the strength of the part of the tube body 1 that extends out of the mold increases after being formed by the first upset wave 2, the difficulty of forming the second upset wave 3 increases after the first upset wave 2 is formed. In order not to increase the additional manufacturing cost, the number of the second sub-upset waves 31 is not greater than the number of the first sub-upset waves 21.
[0079] The thickness T1 of the first upset wave 2 and the thickness T2 of the second upset wave 3 in this application satisfy: 1≤T1 / T2≤7.33. On the one hand, there will be no problem of increased manufacturing cost due to the thickness of the second upset wave 3 being greater than the thickness of the first upset wave 2; on the other hand, there will be no situation where the strength of the second upset wave 3 is insufficient due to its thickness being too small, resulting in the second upset wave 3 being insufficient to restrain the sealing ring.
[0080] For example, T1 / T2 can be 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.33.
[0081] According to some embodiments of this application, the second upset wave 3 includes a second sub-upset wave 31, and the first upset wave 2 includes three first sub-upset waves 21, satisfying the relationship: (6*t-0.1)mm≤T1≤(6*t+0.5)mm.
[0082] Table 5. Test results of the thickness T1 of the first upset wave 2 As can be seen from Examples 1, 2, and 3 in Table 4, if the thickness T1 of the first upset wave 2 satisfies the relationship: (6*t-0.1)mm≤T1≤(6*t+0.5)mm, then the outer circle of the first upset wave 2 is intact. If the thickness T1 of the first upset wave 2 is not within the above protection range, the forming of the first upset wave 2 may result in cracking, uneven end face, irregular outer circle, etc., which seriously affects the forming effect of the first upset wave 2 and leads to serious forming defects.
[0083] Therefore, when the first upset wave 2 is composed of three first sub-upset waves 21 that are sequentially bonded to each other, by setting the thickness T1 of the first upset wave 2 within a reasonable range, the integrity of the first upset wave 2 can be guaranteed, and defects such as cracking, uneven end face, and irregular outer circle of the first upset wave 2 can be avoided.
[0084] In some embodiments of this application, the second upset wave 3 includes m second sub-upset waves 31, satisfying the following relationship: D2≤(1.4*d)mm, (2*m*t-0.1)mm≤T2≤(2*m*t+0.3*k2*m)mm, m≥1, and k2 is a constant.
[0085] It should be noted that k2 is determined by factors such as the material of the connecting pipe 100 and / or the number of the second sub-upsetting wave 31. For example, when the material of the connecting pipe 100 is copper and the number of the second sub-upsetting wave 31 is 1, k2 can be 1.
[0086] When the connecting pipe 100 is made of a higher strength material, such as stainless steel, and the number of the first sub-upsetting wave 21 is 1, k2 can also be 1.
[0087] When the connecting pipe 100 is made of copper and there are multiple first sub-upsetting waves 21, k2 is less than 1. When the connecting pipe 100 is made of stainless steel and there are multiple first sub-upsetting waves 21, the extrusion pressure of the press needs to be increased to ensure that the shape of the extruded first sub-upsetting waves 21 meets the basic requirements. In this case, the value of k2 is greater than that of the connecting pipe 100 made of copper and with the same number of first sub-upsetting waves 21. The thickness of the first upsetting wave 2 of the stainless steel connecting pipe is greater than that of the first upsetting wave 2 of the copper connecting pipe.
[0088] To make the thickness of the first upset wave 2 of the stainless steel connecting pipe close to that of the first upset wave 2 of the copper connecting pipe when extruding the same number of first upset waves 21, the pressure of the press needs to be increased.
[0089] Specifically, when the material of the connecting pipe 100 is copper, the extrusion pressure of the press is about 6MPa, and the number of the first sub-upsetting wave 21 is 1, k2 can be equal to 1. When the number of the first sub-upsetting wave 21 is two or three, k2 satisfies: 0.25≤k2≤0.75.
[0090] When the material of the connecting pipe 100 is stainless steel, the extrusion pressure of the press is about 9MPa, and the number of the first sub-upsetting wave 21 is 1, k2 can be equal to 1. When the number of the first sub-upsetting wave 21 is two or three, k2 satisfies: 0.7≤k2≤1.5.
[0091] However, since the function of the second upset wave 3 is only to limit the sealing ring, it is sufficient to ensure that the side of the second upset wave 3 that is in contact with the sealing ring is flat. At this time, the thickness T2 of the second upset wave 3 can also be larger, that is, the force applied by the pressure head to the second upset wave 3 is smaller, which can also make the side of the second upset wave 3 that is in contact with the sealing ring flat.
[0092] Therefore, this application limits the thickness T2 of the second upset wave 3 to: (2*m*t-0.1)mm≤T2≤(2*m*t+0.3*k2*m)mm.
[0093] The outer diameter of the second upset wave 3 is D2, and the thickness of the first upset wave 2 is T2 along the extension direction of the tube body 1, satisfying the following relationship: D2≤(1.4*d)mm,(2*m*t-0.1)mm≤T2≤(2*m*t+0.3*k2*m)mm.
[0094] Specifically, the connecting pipe 100 is provided with a first upset wave 2 and a second upset wave 3. Along the extension direction of the pipe body 1, the second upset wave 3 is spaced apart from the first upset wave 2. For example, the first upset wave 2 is spaced apart from the pipe opening 11 of the pipe body 1 along the extension direction of the pipe body 1, and the second upset wave 3 is located at the pipe opening 11 of the pipe body 1. The area between the first upset wave 2 and the second upset wave 3 is constructed as a sealing ring installation area.
[0095] It should be noted that during the processing of the connecting pipe 100, the first upset wave 2 and the second upset wave 3 need to be processed separately. Since the first upset wave 2 and the second upset wave 3 are separated, the processing is more difficult. If the dimensions of the first upset wave 2 and the second upset wave 3 are not designed in a standardized manner, it is easier to encounter the problem of the dimensions not being formed.
[0096] To avoid problems in the forming of the second upset wave 3, the outer diameter D2 and the thickness T2 of the second upset wave 3 are both set within a reasonable range in this application. The outer diameter D2 of the second upset wave 3 satisfies the relationship: D2≤(1.4*d)mm, to prevent the outer diameter difference between the second upset wave 3 and the first upset wave 2 from being too large, which would cause inconvenience in the installation of the sealing ring. The thickness T2 of the second upset wave 3 satisfies the relationship: (2*m*t-0.1)mm≤T2≤(2*m*t+0.3*k2*m)mm.
[0097] To enable those skilled in the art to better understand this solution, Tables 6 and 7 below provide comparative examples of the outer diameter D2 of the second upset wave 3 and the thickness T2 of the second upset wave 3.
[0098] Table 6. Test results of the outer diameter D2 of the second upset wave 3 As can be seen from Examples 1, 2, 3, 4 and 5 in Table 5, if the outer diameter D2 of the second upset wave 3 satisfies the relationship: D2≤(1.4*d)mm, then the outer circle forming of the second upset wave 3 is regular. If the outer diameter D2 of the second upset wave 3 is greater than or equal to 1.4 times the outer diameter d of the tube body 1, then the first upset wave 2 may have problems such as outer circle cracking, irregular outer circle forming or even failure to form.
[0099] Therefore, when the first upset wave 2 is composed of two first sub-upset waves 21 that are sequentially attached to each other, by setting the outer diameter D2 of the second upset wave 3 within a reasonable range, the integrity of the first upset wave 2 in forming can be guaranteed, and forming defects in the first upset wave 2 can be avoided.
[0100] Table 7. Test results of the thickness T2 of the second upset wave 3 It should be noted that in the embodiments shown in the table, the material of the connecting pipe 100 is copper, k2 is 1, and the number m of the second sub-wave 31 is 1.
[0101] As can be seen from Examples 1, 2, 3, 4, and 5 in Table 6, if the thickness T2 of the second upsetting wave 3 satisfies the relationship: (2*m*t-0.1)mm≤T2≤(2*m*t+0.3*k2*m)mm, then the forming end face of the second upsetting wave 2 is flat and the forming outer circle is intact. If the thickness T2 of the second upsetting wave 3 is not within the above protection range, the forming of the second upsetting wave 3 may result in cracking of the outer circle or unevenness of the end face, which seriously affects the forming effect of the second upsetting wave 3 and leads to serious forming defects.
[0102] In some embodiments of this application, the second upset wave 3 may include a second sub-upset wave 31, satisfying the following relationship: D2≤(1.4*d)mm, (2*t-0.1)mm≤T2≤(2*t+0.3)mm.
[0103] Since the second upset wave 3 satisfies the above relationship, it can be ensured that the outer diameter and thickness of the second upset wave 3 are within a reasonable range. It will not cause cracking of the outer periphery of the upset wave due to excessive outer diameter or insufficient thickness, nor will it cause uneven sealing surface when mating with the sealing element due to excessive thickness of the upset wave.
[0104] In some embodiments of this application, such as Figure 5As shown, the second upset wave 3 includes two second sub-upset waves 31, and the two second sub-upset waves 31 are attached to each other along the extension direction of the pipe body 1. The outer diameter of the second upset wave 3 is D3, and the thickness of the second upset wave 3 along the extension direction of the pipe body 1 is T3, satisfying the following relationship: D3≤(1.4*d)mm,(4*t-0.1)mm≤T3≤(4*t+0.5)mm.
[0105] Specifically, the second upset wave 3 can be composed of two second sub-upset waves 31 processed separately by an upset wave processing device. Along the extension direction of the pipe body 1, the two second sub-upset waves 31 are fitted together. It can be understood that, as... Figure 3 As shown, the outer diameters of the two second sub-upsetting waves 31 are the same. Therefore, the outer diameter D3 of the second upsetting wave 3 is the outer diameter of the second sub-upsetting wave 31, and the thickness T3 of the second upsetting wave 3 is the sum of the thicknesses of the two second sub-upsetting waves 31.
[0106] For example, such as Figure 5 As shown, the connecting pipe 100 is provided with a first upset wave 2 and a second upset wave 3. The first upset wave 2 is composed of two mutually attached first sub-upset waves 21, and the second upset wave 3 is composed of two mutually attached second sub-upset waves 31. Along the extension direction of the pipe body 1, the second upset wave 3 is spaced apart from the first upset wave 2. For example, the first upset wave 2 is spaced apart from the pipe opening 11 of the pipe body 1 along the extension direction of the pipe body 1, and the second upset wave 3 is located at the pipe opening 11 of the pipe body 1. The area between the first upset wave 2 and the second upset wave 3 is constructed as a sealing ring installation area.
[0107] It should be noted that during the processing of the connecting pipe 100, the first upset wave 2 and the second upset wave 3 need to be processed separately. Since the first upset wave 2 and the second upset wave 3 are both composed of sub-upset waves, the processing is more difficult. If the dimensions of the first upset wave 2 and the second upset wave 3 are not designed in a standardized manner, it is easier to encounter the problem of the dimensions not being formed.
[0108] It is understandable that, such as Figure 5 As shown, the thickness of the first upset wave 2 is T1, and the outer diameter of the first upset wave 2 is D1. As mentioned above, ensure that the outer diameter D1 of the first upset wave 2 satisfies the relationship: D1≤(2*d)mm, and the thickness T1 of the first upset wave 2 satisfies the relationship: (4*t-0.1)mm≤T1≤(4*t+0.3)mm.
[0109] To avoid problems in the forming of the second upset wave 3, the outer diameter D3 and the thickness T3 of the second upset wave 3 are both set within a reasonable range in this application. The outer diameter D3 of the second upset wave 3 satisfies the relationship: D3≤(1.4*d)mm, to prevent the outer diameter difference between the second upset wave 3 and the first upset wave 2 from being too large, which would make it inconvenient to install the sealing ring. The thickness T3 of the second upset wave 3 satisfies the relationship: (4*t-0.1)mm≤T3≤(4*t+0.5)mm.
[0110] To enable those skilled in the art to better understand this solution, Tables 7 and 8 below provide comparative examples of the outer diameter D3 of the second upset wave 3 and the thickness T3 of the second upset wave 3.
[0111] Table 7. Test results of the outer diameter D3 of the second upset wave 3 As can be seen from Examples 1, 2, 3, 4 and 5 in Table 7, if the outer diameter D3 of the second upset wave 3 satisfies the relationship: D3≤(1.4*d)mm, then the outer circle forming of the second upset wave 3 is regular. If the outer diameter D3 of the second upset wave 3 is greater than or equal to 1.4 times the outer diameter d of the tube body 1, then the second upset wave 3 may have irregular outer circle forming or even be unable to be formed.
[0112] Therefore, when the first upset wave 2 is composed of two sequentially bonded first sub-upset waves 21, and the second upset wave 3 is composed of two sequentially bonded second sub-upset waves 31, by setting the outer diameter D3 of the second upset wave 3 within a reasonable range, the integrity of the second upset wave 3 forming can be guaranteed, and defects such as irregular outer circle forming or even failure to form the second upset wave 3 can be avoided.
[0113] Table 8. Test results of the thickness T3 of the second upset wave 3 As can be seen from Examples 1, 2, and 3 in Table 8, if the thickness T3 of the second upsetting wave 3 satisfies the relationship: (4*t-0.1)mm≤T3≤(4*t+0.5)mm, the outer circle of the second upsetting wave 3 is intact. If the thickness T3 of the second upsetting wave 3 is not within the above protection range, the forming of the second upsetting wave 3 may result in cracking, uneven end face, irregular outer circle, etc., which seriously affects the forming effect of the second upsetting wave 3 and leads to serious forming defects.
[0114] Therefore, when the first upset wave 2 is composed of two sequentially bonded first sub-upset waves 21, and the second upset wave 3 is composed of two sequentially bonded second sub-upset waves 31, by setting the thickness T3 of the second upset wave 3 within a reasonable range, the integrity of the second upset wave 3 can be guaranteed, and defects such as cracking, uneven end face, and irregular outer circle of the second upset wave 3 can be avoided.
[0115] In some embodiments of this application, the second upset wave 3 includes three second sub-upset waves 31, and the three second sub-upset waves 31 are sequentially attached to each other along the extension direction of the pipe body 1. The outer diameter of the second upset wave 3 is D4, and the thickness of the second upset wave 3 along the extension direction of the pipe body 1 is T4, satisfying the following relationship: D4≤(1.4*d)mm, (6*t-0.1)mm≤T4≤(6*t+0.5)mm.
[0116] Specifically, the second upset wave 3 can be composed of three second sub-upset waves 31 processed separately by an upset wave processing device. Along the extension direction of the pipe body 1, the three second sub-upset waves 31 are arranged in close contact with each other. It can be understood that, as... Figure 3 As shown, the three second sub-upsetting waves 31 have the same outer diameter. Therefore, the outer diameter D4 of the second upsetting wave 3 is the outer diameter of the second sub-upsetting wave 31, and the thickness T4 of the second upsetting wave 3 is the sum of the thicknesses of the three second sub-upsetting waves 31.
[0117] For example, the connecting pipe 100 is provided with a first upset wave 2 and a second upset wave 3. Therefore, the first upset wave 2 and the second upset wave 3 need to be processed separately. Since the first upset wave 2 and the second upset wave 3 are both composed of sub-upset waves, the processing is more difficult. If the size design of the first upset wave 2 and the second upset wave 3 is not standardized, it is easier to encounter the problem of the size not being formed.
[0118] It is understandable that the first upset wave 2 may include two first sub-upset waves 21. The thickness of the first upset wave 2 is T1, and the outer diameter of the first upset wave 2 is D1. As mentioned above, it is necessary to ensure that the outer diameter D1 of the first upset wave 2 satisfies the relationship: D1≤(2*d)mm, and the thickness T1 of the first upset wave 2 satisfies the relationship: (4*t-0.1)mm≤T1≤(4*t+0.3)mm.
[0119] To avoid problems in the forming of the second upset wave 3, the outer diameter D4 and the thickness T4 of the second upset wave 3 are both set within a reasonable range in this application. The outer diameter D4 of the second upset wave 3 satisfies the relationship: D3≤(1.4*d)mm, to prevent the outer diameter difference between the second upset wave 3 and the first upset wave 2 from being too large, which would make it inconvenient to install the sealing ring. The thickness T4 of the second upset wave 3 satisfies the relationship: (6*t-0.1)mm≤T4≤(6*t+0.5)mm.
[0120] To enable those skilled in the art to better understand this solution, Tables 9 and 10 below provide examples comparing and contrasting the outer diameter D4 of the second upset wave 3 and the thickness T4 of the second upset wave 3.
[0121] Table 9. Test results of the outer diameter D4 of the second upset wave 3 As can be seen from Examples 1, 2, 3, 4 and 5 in Table 9, if the outer diameter D4 of the second upset wave 3 satisfies the relationship: D4≤(1.4*d)mm, then the outer circle forming of the second upset wave 3 is regular. If the outer diameter D4 of the second upset wave 3 is greater than or equal to 1.4 times the outer diameter d of the tube body 1, then the second upset wave 3 may have irregular outer circle forming or even be unable to be formed.
[0122] Therefore, when the first upset wave 2 is composed of two sequentially bonded first sub-upset waves 21, and the second upset wave 3 is composed of three sequentially bonded second sub-upset waves 31, by setting the outer diameter D4 of the second upset wave 3 within a reasonable range, the integrity of the second upset wave 3 forming can be guaranteed, and defects such as irregular outer circle forming or even failure to form the second upset wave 3 can be avoided.
[0123] Table 10. Test results of the thickness T4 of the second upset wave 3 As can be seen from Examples 1, 2, and 3 in Table 10, if the thickness T4 of the second upsetting wave 3 satisfies the relationship: (6*t-0.1)mm≤T4≤(6*t+0.5)mm, then the outer circle of the second upsetting wave 3 is intact. If the thickness T4 of the second upsetting wave 3 is not within the above protection range, the forming of the second upsetting wave 3 may result in cracking, uneven end face, irregular outer circle, etc., which seriously affects the forming effect of the second upsetting wave 3 and leads to serious forming defects.
[0124] Therefore, when the first upset wave 2 is composed of two sequentially bonded first sub-upset waves 21, and the second upset wave 3 is composed of three sequentially bonded second sub-upset waves 31, by setting the thickness T4 of the second upset wave 3 within a reasonable range, the integrity of the second upset wave 3 can be guaranteed, and defects such as cracking, uneven end face, and irregular outer circle of the second upset wave 3 can be avoided.
[0125] In some embodiments of this application, the first upset wave 2 includes three first sub-upset waves 21, and the three first sub-upset waves 21 are sequentially attached to each other along the extension direction of the pipe body 1. The outer diameter of the first upset wave 2 is D5, and the thickness of the first upset wave 2 along the extension direction of the pipe body 1 is T5, satisfying the following relationship: D5≤(2*d)mm, (6*t-0.1)mm≤T5≤(6*t+0.5)mm.
[0126] Specifically, the first upset wave 2 can be composed of three first sub-upset waves 21 processed separately by an upset wave processing device. Along the extension direction of the pipe body 1, the three first sub-upset waves 21 are arranged in close contact with each other. It can be understood that, as... Figure 3As shown, the three first sub-upsetting waves 21 have the same outer diameter. Therefore, the outer diameter D5 of the first upsetting wave 2 is the outer diameter of the first sub-upsetting wave 21, and the thickness T5 of the first upsetting wave 2 is the sum of the thicknesses of the three first sub-upsetting waves 21.
[0127] It should be noted that since the first upset wave 2 is composed of three mutually fitted first sub-upset waves 21, the processing difficulty is greater. If the size design of the first upset wave 2 is not standardized, it is more likely to cause the problem of the size not being formed.
[0128] Based on this, in this application, the outer diameter D5 and the thickness T5 of the first upset wave 2 are both set within a reasonable range. The outer diameter D5 of the first upset wave 2 satisfies the relationship: D5≤(2*d)mm, and the thickness T5 of the first upset wave 2 satisfies the relationship: (6*t-0.1)mm≤T5≤(6*t+0.5)mm.
[0129] To enable those skilled in the art to better understand this solution, Tables 11 and 12 below provide comparative examples of the outer diameter D5 and thickness T5 of the first upset wave 2, respectively.
[0130] Table 11. Test results of the outer diameter D5 of the first upset wave 2 As can be seen from Examples 1, 2, 3, 4 and 5 in Table 11, if the outer diameter D5 of the first upset wave 2 satisfies the relationship: D5≤(2*d)mm, then the outer circle forming of the first upset wave 2 is regular. If the outer diameter D5 of the first upset wave 2 is greater than or equal to 1.4 times the outer diameter d of the tube body 1, then the first upset wave 2 may have irregular outer circle forming or even be unable to be formed.
[0131] Therefore, when the first upset wave 2 is composed of three first sub-upset waves 21 that are sequentially attached to each other, by setting the outer diameter D5 of the first upset wave 2 within a reasonable range, the integrity of the forming of the first upset wave 2 can be guaranteed, and defects such as irregular outer circle forming or even failure to form the first upset wave 2 can be avoided.
[0132] Table 12. Test results of the thickness T5 of the first upset wave 2 As can be seen from Examples 1, 2, and 3 in Table 12, if the thickness T5 of the first upset wave 2 satisfies the relationship: (6*t-0.1)mm≤T5≤(6*t+0.5)mm, then the outer circle of the first upset wave 2 is intact. If the thickness T5 of the first upset wave 2 is not within the above protection range, the forming of the first upset wave 2 may result in cracking, uneven end face, irregular outer circle, etc., which seriously affects the forming effect of the first upset wave 2 and leads to serious forming defects.
[0133] Therefore, when the first upset wave 2 is composed of three first sub-upset waves 21 that are sequentially bonded to each other, by setting the thickness T5 of the first upset wave 2 within a reasonable range, the integrity of the first upset wave 2 can be guaranteed, and defects such as cracking, uneven end face, and irregular outer circle of the first upset wave 2 can be avoided.
[0134] In some embodiments of this application, such as Figure 6 As shown, the connecting pipe 100 also includes a second upset wave 3. The second upset wave 3 is disposed on the outer circumferential surface of the pipe body 1. The second upset wave 3 extends circumferentially along the pipe body 1. Along the extension direction of the pipe body 1, the second upset wave 3 is spaced apart from the first upset wave 2. The outer diameter of the second upset wave 3 is D6. Along the extension direction of the pipe body 1, the thickness of the second upset wave 3 is T6, satisfying the following relationship: D6≤(1.4*d)mm, (2*t-0.1)mm≤T6≤(2*t+0.3)mm.
[0135] Specifically, such as Figure 6 As shown, the connecting pipe 100 is provided with a first upset wave 2 and a second upset wave 3. The first upset wave 2 is composed of three mutually attached first sub-upset waves 21. Along the extension direction of the pipe body 1, the second upset wave 3 is spaced apart from the first upset wave 2. For example, the first upset wave 2 is spaced apart from the pipe opening 11 of the pipe body 1 along the extension direction of the pipe body 1. The second upset wave 3 is located at the pipe opening 11 of the pipe body 1. The area between the first upset wave 2 and the second upset wave 3 is constructed as a sealing ring installation area.
[0136] It should be noted that during the processing of the connecting pipe 100, the first upset wave 2 and the second upset wave 3 need to be processed separately. Since the first upset wave 2 and the second upset wave 3 are separated, the processing is more difficult. If the dimensions of the first upset wave 2 and the second upset wave 3 are not designed in a standardized manner, it is easier to encounter the problem of the dimensions not being formed.
[0137] It is understandable that, such as Figure 6 As shown, the thickness of the first upset wave 2 is T5, and the outer diameter of the first upset wave 2 is D5. As mentioned above, the outer diameter D5 of the first upset wave 2 should satisfy the following relationship: D5≤(2*d)mm, and the thickness T5 of the first upset wave 2 should satisfy the following relationship: (6*t-0.1)mm≤T5≤(6*t+0.5)mm.
[0138] To avoid problems in the forming of the second upset wave 3, the outer diameter D6 and the thickness T6 of the second upset wave 3 are both set within a reasonable range in this application. The outer diameter D6 of the second upset wave 3 satisfies the relationship: D6≤(1.4*d)mm, to prevent the outer diameter difference between the second upset wave 3 and the first upset wave 2 from being too large, which would make it inconvenient to install the sealing ring. The thickness T6 of the second upset wave 3 satisfies the relationship: (2*t-0.1)mm≤T6≤(2*t+0.3)mm.
[0139] To enable those skilled in the art to better understand this solution, Tables 13 and 14 below provide comparative examples of the outer diameter D6 of the second upset wave 3 and the thickness T6 of the second upset wave 3.
[0140] Table 13. Test results of the outer diameter D6 of the second upset wave 3 As can be seen from Examples 1, 2, 3, 4 and 5 in Table 13, if the outer diameter D6 of the second upset wave 3 satisfies the relationship: D6≤(1.4*d)mm, then the outer circle forming of the second upset wave 3 is regular. If the outer diameter D6 of the second upset wave 3 is greater than or equal to 1.4 times the outer diameter d of the tube body 1, then the first upset wave 2 may have problems such as outer circle cracking, irregular outer circle forming or even failure to form.
[0141] Therefore, when the first upset wave 2 is composed of three first sub-upset waves 21 that are sequentially attached to each other, by setting the outer diameter D6 of the second upset wave 3 within a reasonable range, the integrity of the first upset wave 2 in forming can be guaranteed, and forming defects in the first upset wave 2 can be avoided.
[0142] Table 14. Test results of the thickness T6 of the second upset wave 3 As can be seen from Examples 1, 2, 3, 4, and 5 in Table 14, if the thickness T6 of the second upsetting wave 3 satisfies the relationship: (2*t-0.1)mm≤T6≤(2*t+0.3)mm, then the forming end face of the first upsetting wave 2 is flat and the forming outer circle is intact. If the thickness T6 of the second upsetting wave 3 is not within the above protection range, the forming of the second upsetting wave 3 may result in cracking of the outer circle or unevenness of the end face, which seriously affects the forming effect of the second upsetting wave 3 and leads to serious forming defects.
[0143] Therefore, when the first upset wave 2 is composed of three first sub-upset waves 21 that are sequentially bonded to each other, by setting the thickness T6 of the second upset wave 3 within a reasonable range, the integrity of the second upset wave 3 can be guaranteed, and defects such as cracking or uneven end faces that prevent the second upset wave 3 from being formed can be avoided.
[0144] In some embodiments of this application, the connecting pipe 100 is a metal component. Specifically, the connecting pipe 100 can be constructed as a metal component, such as copper, aluminum alloy, stainless steel, etc. Optionally, when the connecting pipe 100 is made of stainless steel, since stainless steel is relatively hard, special processing equipment is usually required to remove excess material. This application can transform the excess material of the stainless steel pipe body 1 into an annular protrusion extending circumferentially along the pipe body 1, thereby facilitating the removal of excess material from the stainless steel connecting pipe 100, and at a low cost.
[0145] In some embodiments of this application, the connecting pipe 100 is a one-piece molded part. That is, the connecting pipe 100 can be constructed as a one-piece molded part, which can improve the structural strength of the connecting pipe 100 and help to further ensure the safety and reliability of the connection performance.
[0146] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0147] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.
[0148] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.
[0149] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and such modifications and variations all fall within the scope defined by the appended claims.
Claims
1. A connecting pipe, characterized in that, include: tube body(1); The first upset wave (2) extends circumferentially along the outer peripheral surface of the tube body (1); Wherein, the outer diameter of the tube body (1) is d mm, the wall thickness of the tube body (1) is t mm, the outer diameter of the first upset wave (2) is D1 mm, the thickness of the first upset wave (2) along the extension direction of the tube body (1) is T1 mm, and the first upset wave (2) includes n first sub-upset waves (21), which satisfy the following relationship: D1≤(2*d) mm, (2*n*t-0.1) mm≤T1≤(2*n*t+0.2*k1*n) mm, n≥1, and k1 is a constant.
2. The connecting pipe according to claim 1, characterized in that, The first upset wave (2) includes a first sub-upset wave (21) that satisfies the relationship: (2*t-0.1)mm≤T1≤(2*t+0.2)mm.
3. The connecting pipe according to claim 1, characterized in that, The first upset wave (2) includes two first sub-upset waves (21), which satisfy the relationship: (4*t-0.1)mm≤T1≤(4*t+0.3)mm.
4. The connecting pipe according to any one of claims 1-3, characterized in that, The first upset wave (2) is spaced apart from the opening (11) of the tube body (1) along the extension direction of the tube body (1).
5. The connecting pipe according to claim 4, characterized in that, The connecting pipe (100) also includes a second upset wave (3), which is disposed at the pipe opening (11) of the pipe body (1) and extends circumferentially along the outer peripheral surface of the pipe body (1).
6. The connecting pipe according to claim 5, characterized in that, The second upset wave (3) includes m second sub-upset waves (31), m≥1, satisfying: m≤n.
7. The connecting pipe according to claim 5 or 6, characterized in that, The outer diameter of the second upset wave (3) is D2 mm, and the thickness of the second upset wave (3) along the extension direction of the tube body (1) is T2 mm, satisfying: D2≤(1.4*d)mm, 1≤T1 / T2≤7.
33.
8. The connecting pipe according to claim 6, characterized in that, The second upset wave (3) includes one second sub-upset wave (31), and the first upset wave (2) includes three first sub-upset waves (21), satisfying the relationship: (6*t-0.1)mm≤T1≤(6*t+0.5)mm.
9. The connecting pipe according to claim 1, characterized in that, The connecting pipe (100) is a metal part.