Support frame

Abstract

The utility model provides a supporting frame which comprises at least two elastic supporting pieces and at least two connecting assemblies. The at least two elastic support members are adjacently distributed along a circumference. Each elastic supporting piece comprises an outer supporting part and two inner supporting parts, and the outer supporting parts are used for abutting against the inner wall of the outer pipe in an attached mode. The two inner supporting parts are arranged at the two opposite ends of the outer supporting part and located on the inner side of the outer supporting part respectively, and the inner supporting parts are used for being attached to and abutting against the outer wall of the inner pipe. Each connecting assembly is connected between two adjacent elastic supporting pieces. Each connecting assembly comprises two connecting parts and a connecting piece, the two connecting parts are arranged at the ends, away from the outer supporting parts, of the inner supporting parts of the two adjacent elastic supporting pieces correspondingly, and the connecting pieces are connected with the two connecting parts so as to be used for connecting the two adjacent inner supporting parts to achieve connection of the two adjacent elastic supporting pieces. And all the inner supporting parts are jointly clamped and fixed on the periphery of the inner pipe. By means of the design, the supporting frame can be elastically supported between the inner wall of the outer pipe and the inner pipe so as to adapt to the condition of thermal expansion and cold contraction.

Description

Technical Field

[0001] This utility model relates to the field of double-walled tube technology, and in particular to a support frame. Background Technology

[0002] Double-walled pipes are generally formed by inserting a larger-diameter seamless steel pipe into the outer casing of a smaller-diameter seamless steel pipe. In this process, it is often necessary to support and fix the inner and outer pipes to maintain their relative positions.

[0003] Currently, the support structure of existing double-walled pipes is generally a rigid bracket, which cannot adapt to thermal expansion and contraction. This results in a lack of effective rigid support between the inner and outer pipes, and the pipes cannot absorb vibrations caused by external forces, making them prone to deformation and even damage. In addition, the aforementioned support structures are generally complex, which also leads to difficulties in installation and maintenance. Utility Model Content

[0004] The purpose of this utility model is to provide a support frame for elastic support of double-walled tubes, which can play a role in buffering and vibration reduction, improving the stability and safety of double-walled tubes, and the support frame has a simple structure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] According to one aspect of this application, a support frame is provided for a double-walled pipe, the double-walled pipe comprising an inner pipe and an outer pipe spaced apart from each other, the support frame comprising:

[0007] At least two elastic support members are distributed adjacently along a circumference; each elastic support member includes an outer support portion and two inner support portions, the outer support portion is used to fit against the inner wall of the outer tube; the two inner support portions are disposed at opposite ends of the outer support portion and are respectively located on the inner side of the outer support portion, each inner support portion is used to fit against the outer wall of the inner tube.

[0008] At least two connecting components are provided, each connecting component being connected between two adjacent elastic support members; each connecting component includes two connecting parts and a connecting member, the two connecting parts being respectively disposed at one end of the inner support part of the two adjacent elastic support members away from the outer support part, the connecting member being connected to the two connecting parts to connect the two adjacent inner support parts and realize the connection of the two adjacent elastic support members, so that all the inner support parts are jointly clamped and fixed to the outer periphery of the inner tube.

[0009] In some embodiments, the connector of each of the connecting components is detachably connected to the two connecting portions;

[0010] Each of the two connecting parts is provided with a connecting hole; the connecting member includes a screw and a nut, the screw passes through the two connecting holes, and the nut is threadedly connected to the screw to realize the connection of the two connecting parts.

[0011] In some embodiments, each of the connecting portions is connected to the inner support portion via a first transition portion;

[0012] The first transition portion is arc-shaped, and the concave surfaces of the two first transition portions face opposite directions.

[0013] In some embodiments, each of the connecting components further includes at least one snap-fit ​​portion connected to one end of the connecting portion away from the inner support portion, and the snap-fit ​​portion and the inner support portion are arranged on opposite sides of the connecting portion;

[0014] The snap-fit ​​portion and the connecting portion enclose a receiving position, and each receiving position is used to receive another connecting portion and another snap-fit ​​portion.

[0015] In some embodiments, each of the connecting components includes two latching portions, which are staggered along the inward and outward directions;

[0016] Each of the snap-fit ​​portions is connected to the connecting portion through a second transition portion. Each second transition portion is arc-shaped, and the concave surfaces of the two second transition portions are arranged facing each other.

[0017] In some embodiments, each of the elastic support members further includes two support portions, each of the support portions being correspondingly connected between the inner side of an inner support portion and the inner side of an outer support portion, so that the outer support portion and the inner support portion are distributed along an inner and outer interval;

[0018] The support portion, the inner support portion, the outer support portion, and the connecting portion are integrally formed.

[0019] In some embodiments, each of the support portions is connected to the outer support portion via a third transition portion, and the support portion is connected to the inner support portion via a fourth transition portion;

[0020] Both the third transition portion and the fourth transition portion are arc-shaped. The concave surface of the third transition portion faces the outer support portion, and the concave surface of the fourth transition portion faces the opposite direction to the concave surface of the third transition portion.

[0021] In some embodiments, the outer side of the outer support portion is adapted to the inner wall of the outer tube; the outer support portion is arc-shaped;

[0022] The inner side of the inner support portion is adapted to the outer wall of the inner tube; the inner support portion is arc-shaped;

[0023] The center of the outer side of the outer support coincides with the center of the inner side of the inner support.

[0024] In some embodiments, the support frame further includes two insulating wear-resistant plates, each of which is disposed on the outer side of the outer support portion of one of the elastic support members, and the insulating wear-resistant plates are used to abut against the inner wall of the outer tube;

[0025] The inner side of the insulating wear-resistant plate matches the outer side of the outer support; the outer side of the insulating wear-resistant plate matches the inner wall of the outer tube.

[0026] In some embodiments, the inner side of the insulating wear-resistant plate is open and extends through both ends to form a slot, the slot being used to accommodate the outer support portion; and / or,

[0027] The inner side of the insulating wear-resistant plate is provided with a protrusion, and the outer support part is provided with a limiting groove with an outer opening. The protrusion and the limiting groove are engaged and matched.

[0028] As can be seen from the above technical solution, this utility model has at least the following advantages and positive effects:

[0029] In this application, the adjacent ends of every two elastic support members are connected by a connecting assembly. In the support frame constructed in this way, all elastic support members are circumferentially distributed. The inner support parts of all elastic support members can cooperate to clamp and fix them to the outer periphery of the inner tube. At the same time, the outer support parts of the two elastic support members are arranged on opposite sides of the inner tube, so that the support frame can be elastically supported between the inner wall of the outer tube and the inner tube. In this way, under the condition of thermal expansion and contraction, the elasticity of each elastic support member can be used to keep the support frame in a state of contact support for the inner and outer tubes. In addition, it can also absorb external vibrations through elastic deformation, so as to buffer and protect the outer and inner tubes, reduce fatigue damage caused by vibration, and avoid thermal stress concentration, thereby improving the stability and safety of the double-walled tube.

[0030] Furthermore, since the support frame is composed of two independent elastic support members connected by at least two connectors, the structure of the support frame is simplified. This makes it convenient to install the two elastic support members between the inner tube and the outer tube, thus simplifying the installation operation of the support frame. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the support frame in this embodiment.

[0032] Figure 2 This is an exploded structural diagram of the support frame in this embodiment.

[0033] Figure 3 This is a structural schematic diagram of the support frame in other embodiments.

[0034] The annotations in the attached figures are explained as follows:

[0035] 100. Support frame; 1. Elastic support component; 11. Outer support part; 12. Inner support part; 13. Support part; 14. First transition part; 15. Third transition part; 16. Fourth transition part; 2. Connecting assembly; 21. Connecting part; 21a. First connecting part; 21b. Second connecting part; 22. Connecting component; 221. Screw; 222. Nut; 23. Snap-fit ​​part; 24. Second transition part; 25. Accommodating position; 3. Insulating wear-resistant plate; 200. Double-walled tube; 210. Inner tube; 220. Outer tube. Detailed Implementation

[0036] Typical embodiments embodying the features and advantages of this utility model will be described in detail in the following description. It should be understood that this utility model can have various variations in different embodiments, all of which do not depart from the scope of this utility model, and the descriptions and illustrations therein are for illustrative purposes only and not intended to limit this utility model.

[0037] In the description of this application, it should be understood that, in the embodiments shown in the accompanying drawings, the indications of direction or positional relationships (such as up, down, left, right, front, and back) are merely for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. These descriptions are appropriate when these elements are in the positions shown in the accompanying drawings. If the description of the positions of these elements changes, these directional indications also change accordingly.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0039] This application provides a support frame for a double-walled pipe. Specifically, the double-walled pipe includes an inner pipe and an outer pipe spaced apart, both of which have circular cross-sections. The support frame is positioned between the inner and outer pipes to fix their relative positions.

[0040] The following detailed description of specific embodiments of the support frame of this application, in conjunction with the accompanying drawings, provides a comprehensive overview.

[0041] Figure 1 This is a schematic diagram of the support frame 100 in this embodiment.

[0042] refer to Figure 1The support frame 100 includes at least two elastic support members 1 and at least two connecting assemblies 2. The at least two elastic support members 1 are distributed adjacently along a circumference. Each elastic support member 1 includes an outer support portion 11 and two inner support portions 12. The outer support portion 11 is used to abut against the inner wall of the outer tube 220. The two inner support portions 12 are respectively located at opposite ends of the outer support portion 11 and are situated inside the outer support portion 11. Each inner support portion 12 is used to abut against the outer wall of the inner tube 210. Each connecting assembly 2 connects adjacent elastic support members 1. Each connecting assembly 2 includes two connecting portions 21 and a connecting member 22. The two connecting portions 21 are respectively located at the ends of the inner support portions 12 of adjacent elastic support members 1 that are away from the outer support portions. The connecting member 22 is connected to the two connecting portions 21 to connect adjacent inner support portions, thereby connecting adjacent elastic support members 1 so that all inner support portions 12 are clamped and fixed to the outer circumference of the inner tube 210.

[0043] In this application, the adjacent ends of every two elastic support members 1 are connected by a connecting component 2. In the support frame 100 constructed in this manner, all elastic support members 1 are circumferentially distributed. The inner support portion 12 of all elastic support members 1 can cooperate to clamp and fix them to the outer periphery of the inner tube 210. At the same time, the outer support portions 11 of the two elastic support members 1 are arranged on opposite sides of the inner tube 210, so that the support frame 100 can be elastically supported between the inner wall of the outer tube 220 and the inner tube 210. In this way, under the condition of thermal expansion and contraction, the elasticity of each elastic support member 1 can be used to keep the support frame 100 in a state of contact support for the inner tube 210 and the outer tube 220. In addition, it can also absorb external vibration through elastic deformation, so as to buffer and protect the outer tube 220 and the inner tube 210, reduce fatigue damage caused by vibration, and avoid thermal stress concentration, thereby improving the stability and safety of the double-wall tube 200.

[0044] Furthermore, since the support frame 100 is composed of two independent elastic support members 1 connected by at least two connectors 22, the structure of the support frame 100 is simplified. This makes it convenient to install the two elastic support members 1 between the inner tube 210 and the outer tube 220, thus simplifying the installation operation of the support frame 100.

[0045] refer to Figure 1 This embodiment describes two elastic support members 1, which are symmetrically distributed radially along the circumference. This balances the forces between the inner tube 210 and the outer tube 220, improving the support stability of the inner tube 210 and the outer tube 220. Of course, in other embodiments, the number of elastic support members 1 can be three, four, or more, with the multiple elastic support members 1 symmetrically distributed about the center of the circumference.

[0046] Figure 2 This is an exploded structural diagram of the support frame 100 in this embodiment.

[0047] In this embodiment, each elastic support 1 has a symmetrical structure, which facilitates the uniform force distribution on the outer tube 220 and the inner tube 210, thereby improving support stability. Each elastic support 1 includes an outer support portion 11 and two inner support portions 12.

[0048] The outer support portion 11 is used to fit against the inner wall of the outer tube 220. The outer side of the outer support portion 11 is adapted to the inner wall of the outer tube 220. This design allows the outer side of the outer support portion 11 to fit completely against the inner wall of the outer tube 220, increasing the contact area between the outer support portion 11 and the inner wall of the outer tube 220 and improving the support stability.

[0049] Specifically, the outer support part 11 is arc-shaped and adopts a plate-like structure. This design gives the outer support part 11 a certain degree of elasticity, so as to realize the elastic support of the support frame 100 for the outer tube 220 and the inner tube 210, and to make it easy for the outer support part 11 to adapt to support the outer tube 220 with different diameters, thereby improving the versatility of the support frame 100.

[0050] In this embodiment, the two inner support portions 12 are respectively disposed at opposite ends of the outer support portion 11, and are located on the inner side of the outer support portion 11. The inner side of the outer support portion 11 refers to the side where the concave surface of the outer support portion 11 is located, and the same applies below.

[0051] Each elastic support 1 further includes two support portions 13, each support portion 13 being connected to the inner side of an inner support portion 12 and an outer support portion 11 to achieve connection between the inner support portion 12 and the outer support portion 11, and to distribute the outer support portion 11 and the inner support portion 12 at intervals along the inner and outer sides. The two support portions 13 are symmetrically arranged. This design also allows the elastic support 1 to adopt a Π-shaped structure to support the inner wall of the outer tube 220, which can improve the support strength and extend the fatigue life of the elastic support 1.

[0052] Optionally, each support portion 13 is connected to the outer support portion 11 via a third transition portion 15, and the support portion 13 is connected to the inner support portion 12 via a fourth transition portion 16. Both the third transition portion 15 and the fourth transition portion 16 are arc-shaped, with the concave surface of the third transition portion 15 facing the outer support portion 11, and the concave surface of the fourth transition portion 16 facing the opposite direction. This design allows for arc transitions between each support portion 13 and the outer support portion 11, and between each support portion 13 and the inner support portion 12, reducing and dispersing local stress at the connections between the support portion 13 and the outer support portion 11 and the inner support portion 12. This avoids excessive local stress that could lead to cracks or breakage, thereby improving the service life of the support frame 100. Furthermore, the above design gives the support frame 100 a certain degree of elasticity, so that the support frame 100 can be elastically supported between the outer tube 220 and the inner tube 210. In the case of thermal expansion and contraction, the elasticity of each elastic support member 1 can be used to keep the support frame 100 in a state of contact support to the inner tube 210 and the outer tube 220. In addition, it can also absorb external vibrations through elastic deformation, so as to buffer and protect the outer tube 220 and the inner tube 210, thereby improving the stability and safety of the double-walled tube 200.

[0053] It should be noted that the central angles of the first transition section 14 and the third transition section 15 can be set as needed and are not limited here. For example, as shown... Figure 1 As shown, by setting the central angle of the first transition portion 14 and the third transition portion 15 so that the straight line containing the support portion 13 passes through the center of the outer support portion 11, that is, so that the outer support portion 11 and the support portion 13 form a fan-shaped structure, the support strength can be improved and the fatigue life of the support frame 100 can be extended. Or, as Figure 3 The structural schematic diagram of the support frame 100 in other embodiments shown can also be modified by setting the central angles of the first transition portion 14 and the third transition portion 15 to obtuse angles, so as to accommodate the extension operation of the outer support portion 11 and the inner support portion 12 and increase the surface area of ​​the outer support portion 11 and the inner support portion 12.

[0054] In this embodiment, the inner support portion 12 is used to fit against the outer wall of the inner tube 210. The two support portions of each elastic support member 1 cooperate to allow the elastic support member 1 to be initially clamped and fixed to the outer periphery of the inner tube 210, so as to facilitate the subsequent connection operation of all elastic support members 1. The inner side of the inner support portion 12 is adapted to the outer wall of the inner tube 210. This design allows the inner side of the inner support portion 12 to be completely fitted against the outer wall of the inner tube 210, increasing the contact area between the inner support portion 12 and the outer wall of the inner tube 210, and improving the support stability.

[0055] Specifically, the inner support part 12 is arc-shaped and adopts a plate-like structure. This design gives the inner support part 12 a certain degree of elasticity, so as to realize the elastic support of the support frame 100 for the outer tube 220 and the inner tube 210, and to make the inner support part 12 adapt to support inner tubes 210 with different diameters, thereby improving the versatility of the support frame 100.

[0056] In this embodiment, the inner center of the inner support portion 12 coincides with the outer center of the outer support portion 11. This design enables the outer tube 220 and the inner tube 210 to be coaxially arranged when the support frame 100 is supported between the outer tube 220 and the inner tube 210. Furthermore, since the support frame 100 is elastic, the elasticity of each elastic support member 1 can be used to keep the support frame 100 in a state of contact support for the inner tube 210 and the outer tube 220 under the condition of thermal expansion and contraction, which is beneficial to keeping the outer tube 220 and the inner tube 210 in a coaxial arrangement.

[0057] Since the inner support portion 12 is adapted to the inner tube 210, that is, the center of the inner support portion 12, which fits against the outer wall of the inner tube 210, is located on the central axis of the inner tube 210. At this time, the straight line where the support portion 13 is located passes through the center of the outer support portion 11, and the center of the inner side of the inner support portion 12 coincides with the center of the outer side of the outer support portion 11. This design allows the support portion 13 to extend radially along the inner tube 210, so that the support portion 13 can be radially supported between the inner tube 210 and the outer tube 220, which facilitates the enhancement of the support frame 100's support stability for the inner tube 210 and the outer tube 220.

[0058] refer to Figure 1 and Figure 2 Each connecting component 2 is connected between two adjacent elastic support members 1 to realize the installation of the support frame 100.

[0059] Each connecting component 2 includes two connecting parts 21 and a connecting member 22. The two connecting parts 21 are respectively located at the ends of the inner support parts 12 of two adjacent elastic support members 1 that are away from the outer support parts 11. The connecting member 22 is connected to the two connecting parts 21 to connect the two adjacent inner support parts 12 and realize the connection of the two adjacent elastic support members 1, so that all the inner support parts 12 are clamped and fixed on the outer periphery of the inner tube 210 to realize the installation of the support frame 100.

[0060] In this design, the connector 22 of each connecting component 2 is detachably connected to the two connecting parts 21. This facilitates the installation and disassembly of the support frame 100. For example, each of the two connecting parts 21 has a connecting hole. The connector 22 includes a screw 221 and a nut 222. The screw 221 passes through the two connecting holes, and the nut 222 is threadedly connected to the screw 221 to connect the two connecting parts 21. In practical applications, the position of the nut 222 along the length of the screw 221 can be adjusted, and the relative position between the two connecting parts 21 can be adjusted by the magnitude of the preload, allowing the two connecting parts 21 to move closer or further apart. This adjusts the fit and force between the elastic support 1 and the inner tube 210 and outer tube 220, adapting to support inner tubes 210 and outer tubes 220 with different diameters.

[0061] The inner circumferential wall of the connecting hole may also be provided with an internal thread that matches the thread on the screw 221, so that the screw 221 can also be threadedly connected to the two connecting parts 21, thereby improving the connection stability of the two connecting parts 21 and thus improving the connection strength of the two adjacent elastic support members 1.

[0062] In this embodiment, each connecting portion 21 is connected to the inner support portion 12 through the first transition portion 14, and each connecting portion 21 protrudes outward from the inner support portion 12. The two connecting portions 21 are parallel to each other so that the connector 22 can be simultaneously inserted into the two connecting portions 21. Here, "outward" refers to the side facing the convex surface of the inner support portion 12.

[0063] The first transition portion 14 is arc-shaped, with the concave surfaces of the two first transition portions 14 facing opposite directions, and the central angles of the two first transition portions 14 being the same. This design allows for an arc transition between each connecting portion 21 and the inner support portion 12, which can reduce and disperse the local stress at the connection between the connecting portion 21 and the inner support portion 12. Furthermore, the above design gives the structure formed by the connection portion 21, the inner support portion 12, and the first transition portion 14 a certain degree of elasticity. This allows it to absorb external vibrations through elastic deformation under thermal expansion and contraction, thereby avoiding the risk of cracks or breakage due to excessive local stress and improving the service life of the support frame 100.

[0064] In this embodiment, the support portion 13, the inner support portion 12, the outer support portion 11, and the connecting portion 21 are integrally formed. Specifically, the support portion 13, the inner support portion 12, the outer support portion 11, and the connecting portion 21 are integrally formed by bending a plate-like structure.

[0065] The aforementioned plate-like structure is made of a high-strength, high-elasticity alloy material. For example, this alloy material can be SUS301 stainless steel, giving the support frame 100 corrosion-resistant properties.

[0066] In this embodiment, each connecting component 2 further includes at least one snap-fit ​​portion 23. The snap-fit ​​portion 23 is connected to one end of a connecting portion 21 opposite to the inner support portion 12, and the snap-fit ​​portion 23 and the inner support portion 12 are located on opposite sides of the connecting portion 21. The snap-fit ​​portion 23 and the connecting portion 21 enclose a receiving position 25, and each receiving position 25 is used to receive another connecting portion 21 and another snap-fit ​​portion 23. This design allows the snap-fit ​​portion 23 and the connecting portion 21 to engage with another connecting portion 21 and another snap-fit ​​portion 23, facilitating the positioning operation during the connection process of the two elastic support members 1, and thus benefiting the connection operation of the two elastic support members 1.

[0067] Specifically, each connecting component 2 includes two latching parts 23, which are staggered in the inward and outward directions so that one latching part 23 and the connecting part 21 connected thereto can engage with the other connecting part 21 and the other latching part 23.

[0068] For example, such as Figure 1 As shown, for ease of description, in each connecting component 2, the two connecting parts 21 are respectively the first connecting part 21a and the second connecting part 21b. The first connecting part 21a is connected to the first connecting part 21a, and the second connecting part 21b is connected to the second connecting part 21b. Taking the form that the first connecting part 21a and the second connecting part 21b are distributed vertically as an example, the length of the first connecting part 21a is greater than the length of the second connecting part 21b, so that the first connecting part 21a can extend outward beyond the second connecting part 21b. This allows the first and second connecting parts 23 to be staggered in the inward and outward directions, so that the projection of the first connecting part 21a on the second connecting part 21b in the vertical direction can completely cover the second connecting part 21b. The first connecting part 23 is located outside the second connecting part 23, so that the first connecting part 23 and the first connecting part 21a can accommodate the second connecting part 23 and the second connecting part 21b.

[0069] Each snap-fit ​​portion 23 is connected to the connecting portion 21 via a second transition portion 24. Each second transition portion 24 is arc-shaped, and the concave surfaces of the two second transition portions 24 are arranged facing each other. This design allows for an arc transition between the snap-fit ​​portion 23 and the connecting portion 21, which can reduce and disperse the local stress at the connection between the connecting portion 21 and the snap-fit ​​portion 23. Furthermore, the above design gives the structure formed by the connection portion 21, the snap-fit ​​portion 23, and the second transition portion 24 a certain degree of elasticity, facilitating snap-fit ​​engagement during installation.

[0070] In this embodiment, each elastic support 1 and the two connecting parts 21, two first transition parts 14, two snap-fit ​​parts 23, and two second transition parts 24 corresponding to the elastic support 1 are integrally formed. That is, they are integrally formed by bending a plate-like structure. This method can realize the modularity of the above structure, which is convenient for production, installation, maintenance and other operations. In addition, the modular design also makes the elastic support 1 and the inner tube 210 form a flow channel. While supporting the outer tube 220 and the inner tube 210, the flow channel can realize ventilation and exhaust between the inner tube 210 and the outer tube 220.

[0071] refer to Figure 1 In this embodiment, the support frame 100 further includes two insulating wear-resistant plates 3. Each insulating wear-resistant plate 3 is disposed on the outer side of the outer support portion 11 of an elastic support member 1. The insulating wear-resistant plate 3 is used to abut against the inner wall of the outer tube 220. The insulating wear-resistant plate 3 can be made of materials such as PTFE. The insulating wear-resistant plate 3 has the characteristics of electrical insulation and low coefficient of friction. By using the insulating wear-resistant plate 3 to abut against the outer tube 220, the risk of friction damage is reduced, the service life of the support frame 100 is improved, and energy transfer is reduced.

[0072] The inner side of the insulating wear-resistant plate 3 matches the outer side of the outer support part 11, and the outer side of the insulating wear-resistant plate 3 matches the inner wall of the outer tube 220. This design allows the insulating wear-resistant plate 3 to be fixedly attached to the outer side of the outer support part 11, while also abutting against the inner wall of the outer tube 220, increasing the contact area between the insulating wear-resistant plate 3 and the outer support part 11 and the inner wall of the outer tube 220.

[0073] The insulating wear-resistant plate 3 has an inner opening and through-ends to form a slot for accommodating the outer support part 11. Alternatively, the inner side of the insulating wear-resistant plate 3 has a protrusion, and the outer support part 11 has a limiting groove with an outer opening; the protrusion engages with the limiting groove. This design improves the connection strength between the insulating wear-resistant plate 3 and the outer support part 11.

[0074] Optionally, the inner side of the limiting groove is open, that is, the inner and outer sides of the limiting groove are connected. In this case, the protrusion passes through the limiting groove, and when the insulating wear-resistant plate 3 is attached to the outer side of the outer support part 11, the protrusion can extend inward out of the limiting groove. The protrusion is provided with a limiting hole, which is located inside the outer support part 11. The axis of the limiting hole is perpendicular to the protrusion direction of the protrusion. The limiting hole is used for fasteners to pass through, and the fasteners are connected and fixed to the protrusion. At least one end of the fastener extends beyond the protrusion and can abut against the inner side of the support part, thereby limiting and fixing the insulating wear-resistant plate 3 to the outer support part 11. Multiple fasteners can be provided, spaced circumferentially on the protrusion.

[0075] Alternatively, the protrusion may have an annular groove located inside the outer support portion 11. A limiting ring may be fitted onto the protrusion and engaged within the annular groove. The inner contour cross-sectional area of ​​the limiting ring may be smaller than that of the protrusion. This design prevents the limiting ring from detaching from the protrusion. The outer contour cross-sectional area of ​​the limiting ring may be larger than that of the inner contour cross-sectional area of ​​the limiting groove, allowing the limiting ring to abut against the inner side of the outer support portion 11, thereby fixing the insulating wear-resistant plate 3 to the outer support portion 11.

[0076] In some embodiments, the outer support portion 11 has a through hole corresponding to the limiting groove, the through hole communicating with the limiting groove, and the protrusion has a through hole. A fastener passes through the through hole and extends into the through hole to connect and fix the outer support portion 11 and the insulating wear-resistant plate 3. In this case, the end of the fastener is located inside the protrusion to prevent it from protruding outwards from the insulating wear-resistant plate 3 and affecting the fit between the insulating wear-resistant plate 3 and the outer tube 220. The fastener is connected to both the outer support portion 11 and the protrusion by threads.

[0077] As can be seen from the above technical solution, this utility model has at least the following advantages and positive effects:

[0078] In this application, the adjacent ends of every two elastic support members are connected by a connecting assembly. In the support frame constructed in this way, all elastic support members are circumferentially distributed. The inner support parts of all elastic support members can cooperate to clamp and fix them to the outer periphery of the inner tube. At the same time, the outer support parts of the two elastic support members are arranged on opposite sides of the inner tube, so that the support frame can be elastically supported between the inner wall of the outer tube and the inner tube. In this way, under the condition of thermal expansion and contraction, the elasticity of each elastic support member can be used to keep the support frame in a state of contact support for the inner and outer tubes. In addition, it can also absorb external vibrations through elastic deformation, so as to buffer and protect the outer and inner tubes, reduce fatigue damage caused by vibration, and avoid thermal stress concentration, thereby improving the stability and safety of the double-walled tube.

[0079] Furthermore, since the support frame is composed of two independent elastic support members connected by at least two connectors, the structure of the support frame is simplified. This makes it convenient to install the two elastic support members between the inner tube and the outer tube, thus simplifying the installation operation of the support frame.

[0080] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A support frame for a double-walled pipe, said double-walled pipe comprising an inner pipe and an outer pipe spaced apart, characterized in that, The support frame includes: At least two elastic support members are distributed adjacently along a circumference; each elastic support member includes an outer support portion and two inner support portions, the outer support portion is used to fit against the inner wall of the outer tube; the two inner support portions are disposed at opposite ends of the outer support portion and are respectively located on the inner side of the outer support portion, each inner support portion is used to fit against the outer wall of the inner tube. At least two connecting components are provided, each connecting component being connected between two adjacent elastic support members; each connecting component includes two connecting parts and a connecting member, the two connecting parts being respectively disposed at one end of the inner support part of the two adjacent elastic support members away from the outer support part, the connecting member being connected to the two connecting parts to connect the two adjacent inner support parts and realize the connection of the two adjacent elastic support members, so that all the inner support parts are jointly clamped and fixed to the outer periphery of the inner tube.

2. The support frame according to claim 1, characterized in that, The connector of each of the connecting components is detachably connected to the two connecting parts; Each of the two connecting parts is provided with a connecting hole; the connecting member includes a screw and a nut, the screw passes through the two connecting holes, and the nut is threadedly connected to the screw to realize the connection of the two connecting parts.

3. The support frame according to claim 1, characterized in that, Each of the connecting portions is connected to the inner support portion via a first transition portion; The first transition portion is arc-shaped, and the concave surfaces of the two first transition portions face opposite directions.

4. The support frame according to claim 1, characterized in that, Each of the connecting components further includes at least one snap-fit ​​portion, the snap-fit ​​portion being connected to one end of the connecting portion away from the inner support portion, and the snap-fit ​​portion and the inner support portion being arranged on opposite sides of the connecting portion; The snap-fit ​​portion and the connecting portion enclose a receiving position, and each receiving position is used to receive another connecting portion and another snap-fit ​​portion.

5. The support frame according to claim 4, characterized in that, Each of the connecting components includes two snap-fit ​​parts, which are staggered along the inward and outward directions; Each of the snap-fit ​​portions is connected to the connecting portion through a second transition portion. Each second transition portion is arc-shaped, and the concave surfaces of the two second transition portions are arranged facing each other.

6. The support frame according to claim 1, characterized in that, Each of the elastic support members further includes two support portions, each of the support portions being connected between the inner side of one of the inner support portions and the inner side of the outer support portion, so that the outer support portion and the inner support portion are distributed at an inward and outward interval; The support portion, the inner support portion, the outer support portion, and the connecting portion are integrally formed.

7. The support frame according to claim 6, characterized in that, Each of the aforementioned support portions is connected to the outer support portion via a third transition portion, and the support portion is connected to the inner support portion via a fourth transition portion; Both the third transition portion and the fourth transition portion are arc-shaped. The concave surface of the third transition portion faces the outer support portion, and the concave surface of the fourth transition portion faces the opposite direction to the concave surface of the third transition portion.

8. The support frame according to claim 1, characterized in that, The outer side of the outer support portion is adapted to the inner wall of the outer tube; the outer support portion is arc-shaped; The inner side of the inner support portion is adapted to the outer wall of the inner tube; the inner support portion is arc-shaped; The center of the outer side of the outer support coincides with the center of the inner side of the inner support.

9. The support frame according to claim 1, characterized in that, The support frame also includes two insulating wear-resistant plates, each of which is disposed on the outer side of the outer support portion of one of the elastic support members, and the insulating wear-resistant plates are used to abut against the inner wall of the outer tube; The inner side of the insulating wear-resistant plate matches the outer side of the outer support; the outer side of the insulating wear-resistant plate matches the inner wall of the outer tube.

10. The support frame according to claim 9, characterized in that, The insulating wear-resistant plate has an inner opening and two through-holes forming a slot, which is used to accommodate the outer support part; and / or, The inner side of the insulating wear-resistant plate is provided with a protrusion, and the outer support part is provided with a limiting groove with an outer opening. The protrusion and the limiting groove are engaged and matched.

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