Double-wall pipe and supporting structure thereof

Abstract

The utility model provides a double-wall pipe and a supporting structure thereof. The supporting structure is used for supporting a double-wall pipe and comprises an inner supporting piece, an outer supporting piece and a connecting piece. The inner supporting piece is cylindrical and used for being connected with the inner pipe in a sleeved mode. The outer supporting piece is cylindrical, is annularly arranged on the periphery of the inner supporting piece at intervals and is used for abutting against the inner circumferential wall of the outer pipe. The outer supporting piece and the inner supporting piece are coaxially arranged. The connecting piece is in an annular plate shape and is connected between the inner supporting piece and the outer supporting piece. A through hole is formed in the connecting piece and used for allowing a medium between the outer pipe and the inner pipe to penetrate through. According to the supporting structure, the inner supporting piece and the outer supporting piece are connected through the connecting piece, so that the supporting structure is integrally arranged, the inner supporting piece and the outer supporting piece are both of a cylindrical structure, the contact area of the inner supporting piece and the inner pipe and the contact area of the outer supporting piece and the outer pipe can be increased, the stress point area of the inner pipe and the stress point area of the outer pipe are increased, and therefore the stress resistance of the inner pipe and the outer pipe is improved. Therefore, the inner pipe and the outer pipe are uniformly and stably supported.

Description

Technical Field

[0001] The utility model relates to the technical field of double-walled pipes, in particular to a double-walled pipe and a supporting structure thereof. Background Art

[0002] Double-walled pipes are often composed of an inner pipe and an outer pipe installed coaxially, and are used to transport fluid substances such as gas and liquid. During the installation of double-walled pipes, it is often necessary to use a support structure to support and fix the inner pipe and the outer pipe to fix the relative position between the inner pipe and the outer pipe.

[0003] The support structure currently used often includes multiple support individuals, that is, multiple support individuals are connected by supporting between the inner tube and the outer tube to fix and maintain the coaxial position between the inner tube and the outer tube. However, in the above design, each support individual is independently supported between the inner tube and the outer tube, so that the multiple support individuals cannot be related to each other. When the outer tube and the inner tube are subjected to unbalanced forces, it is easy to cause a certain support individual to be subjected to greater force, resulting in excessive wear of individual support individuals, resulting in the inability of multiple support individuals to assist each other in supporting each other, thereby reducing the support stability of the inner tube and the outer tube. Utility Model Content

[0004] The utility model aims to provide a double-walled pipe and a supporting structure thereof, wherein the supporting structure can evenly and stably support an inner pipe and an outer pipe of the double-walled pipe.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] According to one aspect of the present application, the present application provides a support for a double-walled pipe, the double-walled pipe comprising an inner pipe and an outer pipe with a spacer ring arranged on the outer periphery of the inner pipe, the support structure comprising:

[0007] An inner support member, which is in a cylindrical shape and is used for sleeve-connecting the inner tube;

[0008] An outer support member, which is in a cylindrical shape, wherein a spacer ring of the outer support member is arranged on the outer periphery of the inner support member, and the outer support member is used to abut against the inner peripheral wall of the outer tube; the outer support member is coaxially arranged with the inner support member;

[0009] The connecting piece is in the shape of an annular plate and is connected between the inner supporting piece and the outer supporting piece. A through hole is provided on the connecting piece for allowing the medium between the outer tube and the inner tube to pass through.

[0010] In some embodiments, the axial end of the inner support extends outwardly beyond the connecting member;

[0011] An axial end of the outer support member extends outwardly beyond the connecting member.

[0012] In some embodiments, the support structure further includes a first support assembly, the first support assembly includes a plurality of first support plates, and the plurality of first support plates are circumferentially spaced and distributed on the connecting member;

[0013] Each of the first support plates is fixedly connected to the outer peripheral wall of the inner support member.

[0014] In some embodiments, the support structure further includes a second support assembly, which is arranged corresponding to the first support assembly and is distributed on the connecting member at intervals along the radial direction;

[0015] The second support assembly includes a plurality of second support plates, which are arranged on the connecting member at intervals along the circumferential direction; each of the second support plates is fixedly connected to the inner circumferential wall of the outer support member.

[0016] In some embodiments, the first support plate is triangular in shape;

[0017] The second supporting plate is in a triangular shape.

[0018] In some embodiments, the inner support member includes a main body and an inner guide portion located at an axial end of the main body, the main body is used for sleeve connection with the inner tube, and the inner guide portion is used for guiding;

[0019] The outer support member includes a main body and an outer guide portion located at an axial end of the main body, the main body is used to abut against the outer tube, and the outer guide portion is used for guiding.

[0020] In some embodiments, the number of the through holes is multiple, and the multiple through holes are distributed on the connecting member at intervals along the circumferential direction;

[0021] The connecting piece is also provided with a plurality of through holes, which are distributed at intervals along the circumferential direction and are arranged at intervals from the through holes.

[0022] In some embodiments, the inner diameter of the through hole is smaller than the inner diameter of the through hole;

[0023] The through hole and the through hole are both circular holes.

[0024] In some embodiments, the support structure further includes a first buffer layer, which is disposed on the inner peripheral wall of the inner support member and is used to buffer and protect the inner tube;

[0025] And / or, the support structure further includes a second buffer layer, which is disposed on the outer peripheral wall of the outer support member and is used for buffering and protecting the outer tube.

[0026] According to another aspect of the present application, the present application also provides a double-walled tube, comprising an inner tube, an outer tube, and a plurality of supporting structures disposed between the inner tube and the outer tube, wherein the plurality of supporting structures are spaced apart in the axial direction.

[0027] It can be seen from the above technical solution that the utility model has at least the following advantages and positive effects:

[0028] In the support structure of the present application, the inner support member and the outer support member are connected by a connecting member, so that the support structure is integrated and can achieve mutual support between the outer tube and the inner tube; and the inner support member and the outer support member are both cylindrical structures, which can increase the contact area between the inner support member and the inner tube, and the contact area between the outer support member and the outer tube, thereby increasing the stress point area of ​​the inner tube and the outer tube, thereby achieving stable support for the inner tube and the outer tube, and ensuring that the inner tube and the outer tube are evenly stressed, so as to improve the support effect on the inner tube and the outer tube, thereby achieving the stability of the entire double-walled tube when in use.

[0029] In addition, the design of the through hole on the connecting piece can allow the medium between the outer tube and the inner tube to pass through, and can also reduce the weight of the connecting piece, that is, it can reduce the weight of the connecting piece, and reduce the weight of the entire supporting structure, and then when the supporting structure is supported on the inner tube and the outer tube, it can reduce the load-bearing capacity of the inner tube and the outer tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of the structure of the double-walled tube in this embodiment.

[0031] Figure 2 Schematic diagram of the support structure in this embodiment.

[0032] Figure 3 yes Figure 2 Schematic diagram of the middle support structure in the AA direction.

[0033] Figure 4 is a side view of the support structure in this embodiment.

[0034] The following are the descriptions of the reference numerals:

[0035] 1. Inner tube; 2. Outer tube; 3. Support structure; 31. Inner support member; 311. Main body; 312. Inner guide; 32. Outer support member; 321. Main body; 322. Outer guide; 33. Connector; 34. Through hole; 35. Perforation; 36. First support plate; 37. Second support plate; 38. First buffer layer; 39. Second buffer layer. DETAILED DESCRIPTION

[0036] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially for illustrative purposes rather than for limiting the present invention.

[0037] In the description of the present application, it should be understood that in the embodiments shown in the drawings, the indications of directions or positional relationships (such as up, down, left, right, front and back, etc.) are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the descriptions of the positions of these elements change, the indications of these directions also change accordingly.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0039] The present application provides a double-walled tube that can be used to transport fluid substances such as gas.

[0040] Figure 1 Schematic diagram of the structure of the double-walled tube in this embodiment.

[0041] refer to Figure 1 The double-walled pipe includes an inner pipe 1, an outer pipe 2 and a plurality of supporting structures 3.

[0042] The outer tube 2 is provided with a spacer ring on the outer periphery of the inner tube 1 , and the inner tube 1 and the outer tube 2 are coaxially arranged.

[0043] A plurality of support structures 3 are axially spaced apart between the inner tube 1 and the outer tube 2 and are commonly supported between the inner tube 1 and the outer tube 2 to maintain the relative position between the inner tube 1 and the outer tube 2, thereby achieving stable support for the inner tube 1 and the outer tube 2.

[0044] The specific embodiment of the support structure 3 of the present application is described in detail below with reference to the accompanying drawings.

[0045] Figure 2 is a schematic structural diagram of the support structure 3 in this embodiment, Figure 3 for Figure 2 AA direction schematic diagram of the middle support structure 3, Figure 4 It is a side view of the support structure 3 in this embodiment.

[0046] refer to Figure 2 to Figure 4 The supporting structure 3 includes an inner supporting member 31, an outer supporting member 32 and a connecting member 33. The inner supporting member 31 is cylindrical and is used to sleeve the inner tube 1. The outer supporting member 32 is cylindrical and is provided at the outer periphery of the inner supporting member 31 with a spacer ring for contacting the inner peripheral wall of the outer tube 2. The outer supporting member 32 is coaxially arranged with the inner supporting member 31. The connecting member 33 is an annular plate and is connected between the inner supporting member 31 and the outer supporting member 32. A through hole 34 is provided on the connecting member 33 for the medium between the outer tube 2 and the inner tube 1 to pass through.

[0047] In the above-mentioned support structure 3, the inner support member 31 and the outer support member 32 are connected by the connecting member 33, so that the support structure 3 is integrated, which can realize the mutual support of the outer tube 2 and the inner tube 1; and the inner support member 31 and the outer support member 32 are both cylindrical structures, which can increase the contact area between the inner support member 31 and the inner tube 1, and the contact area between the outer support member 32 and the outer tube 2, thereby increasing the stress point area of ​​the inner tube 1 and the outer tube 2, thereby realizing stable support for the inner tube 1 and the outer tube 2, and ensuring that the inner tube 1 and the outer tube 2 are evenly stressed, so as to improve the supporting effect on the inner tube 1 and the outer tube 2, thereby realizing the stability of the entire double-walled tube when in use.

[0048] In addition, the design of the through hole 34 on the connecting member 33 can allow the medium between the outer tube 2 and the inner tube 1 to pass through, and can also reduce the weight of the connecting member 33, that is, the weight of the connecting member 33 can be reduced, and the weight of the entire supporting structure 3 can be reduced, and then when the supporting structure 3 is supported on the inner tube 1 and the outer tube 2, the load-bearing capacity of the inner tube 1 and the outer tube 2 can be reduced.

[0049] The medium mentioned above can be a flowing substance such as gas or liquid.

[0050] refer to Figure 2 to Figure 4 The inner support 31 is cylindrical and is used to sleeve the inner tube 1. In this embodiment, the inner support 31 is cylindrical, which increases the contact area between the inner support 31 and the inner tube 1, thereby increasing the stress point area of ​​the inner tube 1.

[0051] In this embodiment, the inner support member 31 includes a main body 311 and an inner guide portion 312 located at the axial end of the main body 311. The main body 311 is used to sleeve the inner tube 1, and the inner guide portion 312 is used to guide the inner support member 31 when it is installed on the inner tube 1, so that the inner support member 31 can slide along the outer circumferential wall of the inner tube 1, thereby facilitating the inner support member 31 to be installed on the inner tube 1.

[0052] Specifically, the inner side wall of the inner guide portion 312 is a concave inwardly facing arc surface, which is used to contact the outer peripheral wall of the inner tube 1 to play a guiding role.

[0053] Exemplarily, the inner support 31 may include two inner guides 312, and the two inner guides 312 are arranged at the axial ends of the main body 311. The two inner guides 312 are respectively the first inner guide 312 and the second inner guide 312. In actual application, the above design allows the staff to arbitrarily select the first inner guide 312 or the second inner guide 312 to contact the outer circumferential wall of the inner tube 1 first, so that the selected first inner guide 312 or the second inner guide 312 plays a guiding role in the process of the inner support 31 moving along the outer circumferential wall of the inner tube 1, so as to facilitate the movement of the inner support 31 until the inner support 31 is successfully installed, and the operation is convenient and simple.

[0054] In other embodiments, the inner support member 31 may also include only one inner guide portion 312, and the inner guide portion 312 is located at one axial end of the main body portion 311. In actual application, the end of the inner support member 31 provided with the inner guide portion 312 is first sleeved on the inner tube 1 to guide the subsequent movement of the inner support member 31.

[0055] In this embodiment, the inner support member 31 is made of a rigid material to ensure the supporting strength of the inner support member 31. Exemplarily, the inner support member 31 may be made of stainless steel.

[0056] In this embodiment, the outer support member 32 is cylindrical, and the outer support member 32 is arranged at the outer periphery of the inner support member 31 to abut against the inner peripheral wall of the outer tube 2. The cylindrical design of the outer support member 32 increases the contact area between the outer support member 32 and the outer tube 2, thereby increasing the force point area of ​​the outer tube 2.

[0057] In this embodiment, the outer support member 32 is coaxially arranged with the inner support member 31 , so that when the support structure 3 is installed between the inner tube 1 and the outer tube 2 , the inner support member 31 cooperates with the outer support member 32 to realize the coaxial arrangement of the inner tube 1 and the outer tube 2 .

[0058] In this embodiment, the outer support member 32 includes a main body portion 321 and an outer guide portion 322 located at an axial end of the main body portion 321. The main body portion 321 is used to abut against the outer tube 2, and the outer guide portion 322 is used to guide the outer support member 32 when it is installed on the outer tube 2, so that the outer support member 32 can slide along the inner circumferential wall of the outer tube 2.

[0059] Specifically, the radially outer side wall of the outer guide portion 322 is an outwardly facing arc-shaped surface, which is used to contact the inner circumferential wall of the outer tube 2 to play a guiding role.

[0060] Moreover, the outer guide portion 322 and the inner guide portion 312 are located at the same axial end. In actual application, the inner guide portion 312 cooperates with the outer guide portion 322 to guide the inner support member 31 and the outer support member 32 to move in the same direction and synchronously, thereby facilitating the synchronous installation and support of the inner support member 31 and the outer support member 32 between the inner tube 1 and the outer tube 2.

[0061] Exemplarily, the outer support member 32 may include two outer guide portions 322, and the two outer guide portions 322 are arranged at the axial ends of the main body portion 321. The two outer guide portions 322 are respectively the first outer guide portion 322 and the second outer guide portion 322. In actual application, the above design allows the staff to arbitrarily select the first outer guide portion 322 or the second outer guide portion 322 to contact the inner circumferential wall of the outer tube 2 first, so that the selected first outer guide portion 322 or the second outer guide portion 322 plays a guiding role in the process of the outer support member 32 moving along the inner circumferential wall of the outer tube 2, so as to facilitate the movement of the outer support member 32 along the inner circumferential wall of the outer tube 2 until the entire support structure 3 is successfully installed, and the operation is convenient and simple.

[0062] In other embodiments, the outer support member 32 may also include only one outer guide portion 322, which is located at one axial end of the body portion 321. In this case, the inner support member 31 has an inner guide portion 312 at the same axial end. In actual application, the end of the outer support member 32 provided with the outer guide portion 322 is selected to first contact the inner circumferential wall of the outer tube 2 to guide the subsequent movement of the outer support member 32.

[0063] In this embodiment, the outer support member 32 is made of a rigid material to ensure the supporting strength of the outer support member 32. Exemplarily, the outer support member 32 may be made of a stainless steel material.

[0064] In this embodiment, the connecting member 33 is in the shape of an annular plate, and is connected between the inner supporting member 31 and the outer supporting member 32 .

[0065] refer to Figure 2 and Figure 3 , the axial end of the inner support 31 outwardly exceeds the connecting member 33, and the axial end of the outer support 32 outwardly exceeds the connecting member 33. Specifically, both axial ends of the inner support 31 outwardly exceed the connecting member 33, and both axial ends of the outer support 32 outwardly exceed the connecting member 33. That is, the above design makes the cross section of the integral structure formed by the connecting member 33, the inner support 31 and the outer support 32 in an I-shape, increases the area of ​​the inner support 31 contacting the inner tube 1, and the area of ​​the outer support 32 contacting the outer tube 2, thereby increasing the force-bearing area of ​​the inner tube 1 and the outer tube 2, thereby enhancing the support stability and support strength of the support structure 3 to the inner tube 1 and the outer tube 2, and can ensure that the inner tube 1 and the outer tube 2 are evenly stressed, so as to improve the support effect on the inner tube 1 and the outer tube 2.

[0066] In this embodiment, the connecting member 33 is made of a rigid material to ensure the supporting strength of the connecting member 33. Exemplarily, the connecting member 33 may be made of a stainless steel material.

[0067] refer to Figure 2 and Figure 4 In this embodiment, the connecting member 33 is provided with a through hole 34 for the medium between the outer tube 2 and the inner tube 1 to pass through, so as to ensure the flow of the medium between the outer tube 2 and the inner tube 1; in addition, the through hole 34 can also play a role in reducing weight, that is, it can reduce the weight of the connecting member 33, thereby reducing the weight of the entire supporting structure 3, and further reducing the load-bearing of the inner tube 1 and the outer tube 2. The medium here refers to a fluid substance such as gas.

[0068] The plurality of through holes 34 can increase the speed and flow rate of the medium flowing between the inner tube 1 and the outer tube 2 .

[0069] The plurality of through holes 34 are distributed on the connecting member 33 at intervals along the circumferential direction, that is, the plurality of through holes 34 are collectively surrounded to form a ring, so that interaction forces can be generated between the plurality of through holes 34 .

[0070] In this embodiment, the through hole 34 is a circular hole. Since the circular hole is subjected to uniform force in all directions, stress concentration and deformation are not likely to occur. In addition, the circular hole also has good rotational symmetry, so that the connecting member 33 can evenly distribute the load when subjected to force, further enhancing the anti-deformation ability of the connecting member 33, while reducing the weight of the connecting member 33 and increasing its force bearing capacity.

[0071] The connector 33 is also provided with a plurality of through holes 35, which are spaced apart in the circumferential direction and spaced apart from the through holes 34. That is, the plurality of through holes 35 form a ring shape and are co-centered with the ring shape formed by the plurality of through holes 34. The through holes 35 can cooperate with the through holes 34 to ensure the passage of the medium, and can further reduce the weight of the connector 33.

[0072] In this embodiment, two groups of perforations 35 are provided on the connecting member 33, and each group of perforations 35 includes a plurality of perforations 35 distributed on the connecting member 33 along the circumferential direction. The perforations 35 of the two groups of perforations 35 are distributed at intervals inside and outside the ring. At this time, the ring formed by the plurality of through holes 34 is located between the rings formed by the two groups of perforations 35.

[0073] In this embodiment, the inner diameter of the through hole 35 is smaller than the inner diameter of the through hole 34 .

[0074] The through hole 35 is a circular hole, which can cooperate with the through hole 34 to avoid stress concentration and deformation. In addition, it can also enable the connecting member 33 to evenly distribute the load when subjected to force, further enhancing the anti-deformation ability of the connecting member 33, while reducing the weight of the connecting member 33 and increasing the force-bearing capacity of the connecting member 33.

[0075] refer to Figure 2 to Figure 4 In this embodiment, the support structure 3 further includes a first support assembly. The first support plate 36 is disposed at the radial inner end of the connecting member 33, and the end of the first support assembly close to the inner peripheral wall of the connecting ring is flush with the inner peripheral wall of the connecting ring. Since the axial end of the inner support member 31 extends outward beyond the connecting member 33, the first support assembly can abut against the outer peripheral wall of the inner support member 31, thereby enhancing the supporting force of the connecting member 33, and further enhancing the supporting strength of the entire support structure 3 to the inner tube 1 and the outer tube 2.

[0076] In this embodiment, a first support component is provided on both sides of the connecting member 33, and each first support component is respectively supported between one side of the connecting member 33 and one axial end of the inner support member 31 to balance the supporting force of the connecting member 33 on both sides of the axial direction, thereby enhancing the supporting strength and supporting stability of the entire supporting structure 3 for the inner tube 1 and the outer tube 2.

[0077] In other embodiments, the first supporting assembly may be provided on only one side of the connecting member 33 to enhance the supporting force of the connecting member 33 .

[0078] In this embodiment, the first support assembly includes a plurality of first support plates 36, which are distributed on the connecting member 33 at intervals along the circumferential direction, and the plurality of first support plates 36 are evenly distributed. Specifically, the first support plate 36 is located at one end close to the inner peripheral wall of the connecting ring, and the end of the first support plate 36 close to the inner peripheral wall of the connecting ring is flush with the inner peripheral wall of the connecting ring. Since the axial end of the inner support member 31 extends outward beyond the connecting member 33, the first support plate 36 can abut against the outer peripheral wall of the inner support member 31, and the plurality of first support plates 36 can form an annular multi-point support, which increases the support points of the connecting member 33, and the evenly spaced distribution of the plurality of first support plates 36 can ensure that the force of the connecting member 33 is uniform, and can enhance the supporting force of the connecting member 33, thereby enhancing the supporting strength of the entire support structure 3 to the inner tube 1 and the outer tube 2.

[0079] Each first support plate 36 is fixedly connected to the inner peripheral wall of the inner support member 31 , so as to ensure the supporting effect of the first support plate 36 .

[0080] In this embodiment, the first support plate 36 is in a triangular shape. After the three sides of the triangle are determined, it can be determined that there is only one triangle, and once the three sides of the triangle are determined, the inner angle is also determined, which is unique and cannot be changed. Therefore, the first support plate 36 can strengthen the supporting capacity of the connecting member 33 for a second time.

[0081] In this embodiment, the support structure 3 further includes a second support assembly, which is arranged corresponding to the first support assembly and is radially spaced and distributed on the connecting member 33. That is, the second support assembly is located at one end of the connecting member 33 close to the outer peripheral wall.

[0082] In this embodiment, second support components are provided on both sides of the connecting member 33, and each second support component is respectively supported between one side of the connecting member 33 and one axial end of the outer support member 32 to balance the supporting force of the connecting member 33 on both side surfaces, and cooperate with the first support component located on the same side to further enhance the supporting strength and supporting stability of the entire supporting structure 3 for the inner tube 1 and the outer tube 2.

[0083] In other embodiments, a second support assembly may be provided only on one side of the connection member 33 to enhance the support force of the connection member 33. In the case where the support structure 3 includes only a first support assembly provided on one side of the connection member 33, the second support assembly may be located on the same side of the connection member 33 as the first support assembly, or may be located on opposite sides of the connection member 33 as the first support assembly to balance the support force of the connection member 33 between the radial inner end and the radial outer end.

[0084] The second support assembly includes a plurality of second support plates 37, which are arranged on the connecting member 33 at intervals along the circumferential direction, and the plurality of second support plates 37 are evenly distributed. Specifically, the second support plate 37 is located at one end close to the outer peripheral wall of the connecting ring, and the end of the second support plate 37 close to the outer peripheral wall of the connecting ring is flush with the outer peripheral wall of the connecting ring. Since the axial end of the outer support member 32 extends outward beyond the connecting member 33, the second support plate 37 can abut against the inner peripheral wall of the outer support member 32, and the plurality of second support plates 37 can form an annular multi-point support, which increases the support points of the connecting member 33, and the evenly spaced distribution of the plurality of second support plates 37 can ensure that the force of the connecting member 33 is uniform, and can enhance the supporting force of the connecting member 33, thereby enhancing the supporting strength of the entire support structure 3 to the inner tube 1 and the outer tube 2.

[0085] Each second support plate 37 is fixedly connected to the inner peripheral wall of the outer support member 32 , so as to ensure the supporting effect of the second support plate 37 .

[0086] In this embodiment, the second support plate 37 is in a triangular shape. After the three sides of the triangle are determined, it can be determined that there is only one triangle, and once the three sides of the triangle are determined, the inner angle is also determined, which is unique and cannot be changed. Therefore, the second support plate 37 can strengthen the supporting capacity of the connecting member 33 for a second time.

[0087] refer to Figure 4 In this embodiment, the support structure 3 also includes a first buffer layer 38, and the first buffer layer 38 is arranged on the inner circumferential wall of the inner support member 31. When the inner support member 31 is arranged on the inner tube 1, the first buffer layer 38 can fit with the outer circumferential wall of the inner tube 1 to play a role in buffering and protecting the inner tube 1.

[0088] The axial ends of the first buffer layer 38 are flush with the axial ends of the main body 311 of the inner support 31, so as to expose the inner guide portion 312 of the inner support 31, so that the inner guide portion 312 can contact the outer peripheral wall of the inner tube 1, thereby ensuring the guiding function of the inner guide portion 312. In addition, the above design can also indirectly ensure that the inner peripheral wall of the main body 311 of the inner support 31 is in full contact with the outer peripheral wall of the inner tube 1, so as to increase the force-bearing area of ​​the inner tube 1.

[0089] The first buffer layer 38 is made of a flexible material and has a certain elasticity, so that the first buffer layer 38 can absorb impact force through elastic deformation to achieve a buffering protection effect on the inner tube 1. Exemplarily, the first buffer layer 38 can be made of rubber or plastic.

[0090] In this embodiment, the support structure 3 may further include a second buffer layer 39, which is disposed on the outer peripheral wall of the outer support member 32. When the outer support member 32 abuts against the inner peripheral wall of the outer tube 2, the second buffer layer 39 can fit with the inner peripheral wall of the outer tube 2 to play a role in buffering and protecting the outer tube 2.

[0091] The axial ends of the second buffer layer 39 are flush with the axial ends of the main body 321 of the outer support 32, and the outer guide portion 322 of the outer support 32 can be exposed, so that the outer guide portion 322 can contact the inner circumferential wall of the outer tube 2, thereby ensuring the guiding function of the outer guide portion 322. In addition, the above design can also indirectly ensure that the outer circumferential wall of the main body 321 of the outer support 32 is completely in contact with the inner circumferential wall of the outer tube 2, so as to increase the force-bearing area of ​​the outer tube 2.

[0092] The second buffer layer 39 is made of a flexible material and has a certain elasticity, so that the second buffer layer 39 can absorb the impact force through elastic deformation to achieve a buffering protection effect on the outer tube 2. For example, the second buffer layer 39 can be made of rubber or plastic.

[0093] In other embodiments, the support structure 3 may also only include the first buffer layer 38 or the second buffer layer 39 .

[0094] The installation method of the above-mentioned supporting structure 3 is as follows:

[0095] The staff selects the end of the inner support 31 with the first chamfer to contact the inner tube 1 first, and at the same time selects the end of the outer support 32 with the second chamfer to contact the outer tube 2 first, so as to guide the subsequent sliding of the support structure 3 relative to the inner tube 1 and the outer tube 2, so as to ensure that the support structure 3 is smoothly installed between the inner tube 1 and the outer tube 2, and the operation is convenient and simple.

[0096] It can be seen from the above technical solution that the utility model has at least the following advantages and positive effects:

[0097] In the support structure of the present application, the inner support member and the outer support member are connected by a connecting member, so that the support structure is integrated and can achieve mutual support between the outer tube and the inner tube; and the inner support member and the outer support member are both cylindrical structures, which can increase the contact area between the inner support member and the inner tube, and the contact area between the outer support member and the outer tube, thereby increasing the stress point area of ​​the inner tube and the outer tube, thereby achieving stable support for the inner tube and the outer tube, and ensuring that the inner tube and the outer tube are evenly stressed, so as to improve the support effect on the inner tube and the outer tube, thereby achieving the stability of the entire double-walled tube when in use.

[0098] In addition, the design of the through hole on the connecting piece can allow the medium between the outer tube and the inner tube to pass through, and can also reduce the weight of the connecting piece, that is, it can reduce the weight of the connecting piece, and reduce the weight of the entire supporting structure, and then when the supporting structure is supported on the inner tube and the outer tube, it can reduce the load-bearing capacity of the inner tube and the outer tube.

[0099] Although the utility model has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the utility model can be implemented in a variety of forms without departing from the spirit or essence of the utility model, it should be understood that the above-mentioned embodiments are not limited to any of the aforementioned details, but should be widely interpreted within the spirit and scope defined by the attached claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the attached claims.

Claims

1. A support structure for supporting a double-walled pipe, wherein the double-walled pipe comprises an inner pipe and an outer pipe with a spacer ring disposed on the outer periphery of the inner pipe, characterized in that: The support structure comprises: An inner support member, which is in a cylindrical shape and is used for sleeve-connecting the inner tube; An outer support member, which is in a cylindrical shape, wherein a spacer ring of the outer support member is arranged on the outer periphery of the inner support member, and the outer support member is used to abut against the inner peripheral wall of the outer tube; the outer support member is coaxially arranged with the inner support member; The connecting piece is in the shape of an annular plate and is connected between the inner supporting piece and the outer supporting piece. A through hole is provided on the connecting piece for allowing the medium between the outer tube and the inner tube to pass through.

2. The support structure according to claim 1, characterized in that The axial end of the inner support member extends outwardly beyond the connecting member; An axial end of the outer support member extends outwardly beyond the connecting member.

3. The support structure according to claim 2, characterized in that The support structure further comprises a first support assembly, wherein the first support assembly comprises a plurality of first support plates, and the plurality of first support plates are circumferentially spaced and distributed on the connecting member; Each of the first support plates is fixedly connected to the outer peripheral wall of the inner support member.

4. The support structure according to claim 3, characterized in that The support structure further includes a second support assembly, which is arranged corresponding to the first support assembly and is distributed on the connecting member at intervals along the radial direction; The second support assembly includes a plurality of second support plates, which are arranged on the connecting member at intervals along the circumferential direction; each of the second support plates is fixedly connected to the inner circumferential wall of the outer support member.

5. The support structure according to claim 4, characterized in that The first support plate is in a triangular shape; The second supporting plate is in a triangular shape.

6. The support structure according to claim 1, characterized in that The inner support member comprises a main body and an inner guide portion located at an axial end of the main body, the main body is used for sleeve connection with the inner tube, and the inner guide portion is used for guiding; The outer support member includes a main body and an outer guide portion located at an axial end of the main body, the main body is used to abut against the outer tube, and the outer guide portion is used for guiding.

7. The support structure according to claim 1, characterized in that There are multiple through holes, and the multiple through holes are distributed on the connecting member at intervals along the circumferential direction; The connecting piece is also provided with a plurality of through holes, which are distributed at intervals along the circumferential direction and are arranged at intervals from the through holes.

8. The support structure according to claim 7, characterized in that The inner diameter of the perforation is smaller than the inner diameter of the through hole; The through hole and the through hole are both circular holes.

9. The support structure according to claim 1, characterized in that The support structure further comprises a first buffer layer, which is arranged on the inner peripheral wall of the inner support member and is used for buffering and protecting the inner tube; And / or, the support structure further includes a second buffer layer, which is disposed on the outer peripheral wall of the outer support member and is used for buffering and protecting the outer tube.

10. A double-walled pipe, characterized in that: The invention comprises an inner tube, an outer tube and a plurality of supporting structures arranged between the inner tube and the outer tube, wherein the plurality of supporting structures are arranged at intervals along the axial direction.

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