Supporting device, pipe connection structure of nuclear grade HDPE piping system and HDPE piping system

Abstract

The utility model provides a kind of support device, pipeline connecting structure and HDPE pipe system of nuclear grade HDPE pipe system.The support device is used to support the anchoring ring of HDPE pipe system, and the anchoring ring is provided with anchoring ring convex ring.Support device includes support frame, flange ring and fastener, flange ring is sleeved in anchoring ring, and is located at the both sides of anchoring ring, and both sides flange ring forms interlayer area.Flange ring is installed on support frame, and fastener fastening connection both sides flange ring.Among them, along the radial direction of anchoring ring, anchoring ring convex ring is embedded in interlayer area, to limit the axial and / or radial displacement of anchoring ring relative to support frame.The support device avoids the linear contact or point contact between anchoring ring and support frame direct limiting position.At the same time, it significantly reduces the friction and wear of support device to anchoring ring, greatly reduces the stress concentration phenomenon of anchoring ring, improves the structural safety and service life of pipe system.

Description

Technical Field

[0001] This utility model relates to the field of HDPE pipe system support technology for nuclear power plants, and in particular to a support device, pipe connection structure and HDPE pipe system for nuclear-grade HDPE pipe systems. Background Technology

[0002] High-density polyethylene (HDPE) pipes, due to their excellent corrosion resistance, are suitable for seawater transportation systems. They offer advantages over other pipe materials in environments rich in chloride ion corrosion, making them an ideal alternative to metal pipes in some nuclear power plant systems. The ASME Boiler and Pressure Vessel Code's nuclear-grade component specifications outline requirements for HDPE pipe support devices, emphasizing the avoidance of point or line contact load concentrations. However, in existing pipe support devices, the anchoring rings of HDPE pipes still exhibit significant point or line contact areas with the support device, leading to stress concentrations and increasing the risk of wear or damage to the HDPE pipe. Utility Model Content

[0003] This utility model provides a support device, pipe connection structure, and HDPE pipe system for nuclear-grade HDPE pipe systems, in order to improve the technical problem of point contact or line contact between existing support structures and high-density polyethylene pipes.

[0004] The first aspect of this utility model provides a support device for a nuclear-grade HDPE pipe system. The support device supports the anchoring ring of the HDPE pipe system, and the anchoring ring has an anchoring ring protrusion. The support device includes a support frame, flange rings, and fasteners. The flange rings are sleeved on the anchoring ring and located on both sides of the anchoring ring protrusion, forming a sandwich area between the two flange rings. The flange rings are mounted on the support frame, and the fasteners securely connect the two flange rings. Along the radial direction of the anchoring ring, the anchoring ring protrusion is embedded within the sandwich area to restrict the axial and / or radial displacement of the anchoring ring relative to the support frame.

[0005] In one embodiment of the present invention, the support device further includes a plurality of limiting blocks. The plurality of limiting blocks are spaced apart along the circumferential direction of the flange ring and are respectively fixedly connected to the support frame to limit the axial and / or radial displacement of the flange ring relative to the support frame.

[0006] In one embodiment of the present invention, one end of the limiting block is fixedly connected to the support frame, and the other end extends to the interlayer area.

[0007] In one embodiment of this utility model, the outer diameter of the anchoring ring protrusion is smaller than the minimum radial dimension of the circle containing the inner edges of the plurality of mounting holes of the flange ring. In one embodiment of the present invention, along the axial direction of the anchoring ring, the width of the interlayer region is T, and the thickness of the limiting block is t, where 1 mm ≤ Tt ≤ 2 mm.

[0008] In one embodiment of this utility model, the support frame adopts a frame-type support structure.

[0009] In one embodiment of the present invention, the support device further includes a plurality of pads, which are arranged at intervals on the support frame along the circumferential direction of the flange ring; and along the radial direction of the flange ring, the pads abut against the outer periphery of the flange ring to limit the radial displacement of the flange ring; the limiting block is fixedly connected to the support frame through the pads.

[0010] In one embodiment of the present invention, the number of the limiting blocks is two, and the two limiting blocks are disposed opposite to each other on the outer periphery of the flange ring.

[0011] In one embodiment of this utility model, along the radial direction of the anchoring ring, the outer diameter of the flange ring is d, and the distance between the oppositely arranged pads is D, where 1 mm ≤ Dd ≤ 2 mm.

[0012] In one embodiment of this utility model, the frame-type support structure is made of square steel.

[0013] In one embodiment of this utility model, the flange ring is a loose flange.

[0014] In one embodiment of the present invention, the fastener includes a screw and a plurality of nuts adapted to the screw.

[0015] The second aspect of this utility model provides a pipe connection structure for a nuclear-grade HDPE pipe system, the pipe connection structure including an anchoring ring and a support device as described in any one of the above claims, the support device connecting the anchoring ring to restrict the displacement movement of the anchoring ring.

[0016] In one embodiment of the present invention, the pipe connection structure further includes an HDPE pipe, and the HDPE pipe is connected to the anchoring ring by heat fusion.

[0017] The third aspect of this utility model also provides a nuclear-grade HDPE pipe system, wherein the nuclear-grade HDPE pipe system includes the aforementioned pipe connection structure.

[0018] The beneficial effects of this utility model are as follows: This utility model proposes a support device, pipe connection structure, and HDPE pipe system for nuclear-grade HDPE pipe systems. In this support device, flange rings are fitted onto the straight pipe sections of the anchor rings on both sides of the anchor ring convex ring, and fastened with fasteners to form a sandwich area. The anchor ring convex ring is embedded in the sandwich area, so that the anchor ring convex ring and the flange ring form a surface contact. At the same time, the anchor ring also maintains a surface contact with the flange ring in the radial direction, avoiding the line contact or point contact that would occur when the anchor ring is directly limited by the support frame. This significantly reduces the friction and wear of the anchor ring on the support device, greatly reduces the stress concentration phenomenon of the anchor ring, and improves the structural safety and service life of the pipe system. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0020] In the attached diagram: Figure 1 This is a partial structural cross-sectional view of a pipe connection structure provided in an embodiment of the present utility model; Figure 2 This is a front view of the support device structure provided in an embodiment of the present invention; Figure 3 This is a partial sectional view of a pipe connection structure provided in an embodiment of the present utility model; Figure 4 This is a schematic diagram of the anchoring ring protrusion embedded in the interlayer area according to an embodiment of the present invention.

[0021] The attached figures are labeled as follows: 10. Anchor ring; 11. Anchor ring protrusion; 12. Anchor ring straight pipe section; 20. HDPE pipe; 100, Support frame; 200, Flange ring; 210, Interlayer area; 300, Fastener; 310, Screw; 320, Nut; 330, Locking washer; 400, Limit block; 500, Pad. Detailed Implementation

[0022] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0023] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0024] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present invention.

[0025] Please see Figures 1 to 4 This utility model provides a support device, pipe connection structure, and HDPE pipe system for nuclear-grade HDPE pipe systems. The support device avoids line or point contact between the anchor ring and the support frame. It prevents friction and wear on the anchor ring caused by the support device, significantly reduces stress concentration in the anchor ring, and improves the structural safety and service life of the pipe system. Therefore, it can improve the technical problem of point or line contact between existing support structures and high-density polyethylene pipes.

[0026] Please see Figure 1 The first aspect of this utility model provides a support device for a nuclear-grade HDPE pipe system. This support device supports the anchoring ring 10 of the HDPE pipe system and simultaneously restricts the axial and radial displacement of the anchoring ring 10 and the HDPE pipes 20 connected to both ends of the anchoring ring 10. Specifically, in this embodiment, the anchoring ring 10 includes a straight pipe section 12 and a convex ring 11. The diameter of the straight pipe section 12 is adapted to the diameter of the HDPE pipe 20. The convex ring 11 is integrally provided on the straight pipe section 12, and the radial dimension of the convex ring 11 is larger than the radial dimension of the straight pipe section 12.

[0027] The support device includes a support frame 100, a flange ring 200, and fasteners 300. The support frame 100 is the base structure of the support device. The structure of the support frame 100 is not limited and can be any suitable type of structure that can provide load support for the anchor ring 10 and provide an axial and radial limiting mounting support plane for the flange ring 200. For example, the support frame 100 can adopt a grid-type frame support structure, a table and chair type support structure, or a pipe clamp type support structure, but is not limited thereto. The support frame 100 is fixed to a preset mounting surface. It can be welded to a pre-embedded part on the support surface, or it can be directly used as a pre-embedded structure, so that the lower end of the support frame 100 is pre-embedded in the mounting surface.

[0028] Flange rings 200 are fitted onto the anchoring ring 10 and located on both sides of the anchoring ring convex ring 11. The number of flange rings 200 on each side of the anchoring ring convex ring 11 is not limited; there can be one or two, depending on actual needs. The flange rings 200 on both sides of the anchoring ring convex ring 11 are fastened together by fasteners 300. Fasteners 300 can be standard bolts and nuts, or threaded locking structures with screws and nuts, but are not limited to these. The number of fasteners 300 is determined by the number of mounting holes on the flange rings 200, to achieve relative locking and fixation of the flange rings 200 on both sides of the anchoring ring convex ring 11.

[0029] The flange ring 200 is installed on the support frame 100. The flange ring 200 replaces the anchor ring 11 and directly contacts the support frame 100. In the assembled state, the flange ring 200 and the support frame 100 are relatively fixed. Specifically, the flange ring 200 can be fixed to the support frame 100 by welding, or by bolting through mounting holes on the flange ring 200 and corresponding mounting holes on the support frame 100, or by limiting and fixing through a stop or baffle structure, or by limiting the relative displacement of the flange ring 200 on the support frame 100 through a slot and block structure or by utilizing the frame structure of the support frame 100.

[0030] Please see Figure 1 and Figure 3After the flange rings 200 on both sides of the anchor ring convex ring 11 are locked and fixed, the flange rings 200 on both sides form a sandwich area 210, i.e., a sandwich space, along the axial direction of the anchor ring 10. Among them, the anchor ring convex ring 11 is embedded in the sandwich area 210 along the radial direction of the anchor ring 10 to restrict the axial and / or radial displacement of the anchor ring 10 relative to the support frame 100. Specifically, after the fasteners 300 tighten the flange rings 200 on both sides, the anchor ring convex ring 11 is sandwiched between the flange rings 200 on both sides. When the anchor ring 10 moves axially, the anchor ring convex ring 11 forms a surface contact with the flange ring 200, thereby restricting the axial displacement of the anchor ring 10 and the HDPE pipe 20. At the same time, when the anchor ring 10 attempts to move radially, the outer surface of the straight pipe section 12 of the anchor ring forms a surface contact with the inner surface of the flange ring 200, thereby restricting the radial displacement of the anchor ring 10 and the HDPE pipe 20, thus achieving a three-way limiting state of the anchor ring 10 in the axial and radial directions. This support device can avoid line contact or point contact that would occur when the anchor ring 10 and the support frame 100 are directly limited. The flange ring 200 replaces the anchor ring 10 in line or point contact with the support frame 100, and the flange ring 200 is made of metal, which significantly reduces the friction and wear of the support device on the anchor ring 10. The HDPE material of the anchor ring 10 is in surface contact with the flange ring 200, which greatly reduces the stress concentration phenomenon of the anchor ring 10 and improves the structural safety and service life of the HDPE pipe system.

[0031] Please see Figure 2 In one embodiment of this utility model, the support device further includes multiple limiting blocks 400, which are stop structures for relatively limiting and fixing the flange ring 200 on the support frame 100. Multiple limiting blocks 400 are spaced apart along the circumferential direction of the flange ring 200 and are respectively fixedly connected to the support frame 100 to limit the axial and / or radial displacement of the flange ring 200 relative to the support frame 100. Specifically, in one embodiment, taking the support frame 100 as a rectangular frame as an example, the number of limiting blocks 400 is eight, with each pair of limiting blocks 400 forming a group. These blocks are located on the upper, lower, left, and right sides of the rectangular frame, respectively, on both sides of the welded flange ring 200, thereby achieving radial limitation of the flange ring 200 through the rectangular frame of the support frame 100, and axial limitation of the flange ring 200 by the limiting blocks 400. In another embodiment, there are four limiting blocks 400. In the support frame 100 of the rectangular frame structure, a limiting block 400 is welded to each of the four sides of the rectangular frame, namely the top, bottom, left and right sides. Each limiting block 400 is embedded in the interlayer area 210, thereby using the support frame 100 and the limiting blocks 400 to achieve axial and radial limiting of the flange ring 200.

[0032] Please see Figure 2In one embodiment of this utility model, one end of the limiting block 400 is fixedly connected to the support frame 100, and the other end extends to the interlayer region 210. Specifically, along the radial direction of the anchoring ring 10, one end of the limiting block 400 is welded and fixed to the support frame 100, and the other end is embedded in the interlayer region 210. After the fasteners 300 lock and fix the flange rings 200 on both sides, the flange rings 200 are relatively limited and fixed on the support frame 100. At the same time, when it is necessary to disassemble the anchoring ring 10, there is no need to cut the support frame 100 or the limiting block 400, so as to achieve quick replacement and disassembly of the anchoring ring 10.

[0033] Please see Figure 4 In one embodiment of this utility model, the outer diameter of the anchor ring convex ring 11 is smaller than the minimum radial dimension of the circle containing the inner edges of the multiple mounting holes of the flange ring 200. Let the outer diameter of the anchor ring convex ring be b, and the minimum radial dimension of the circle containing the multiple mounting holes of the flange ring 200 be a, where a > b. That is, along the radial direction of the anchor ring 10, the outer periphery of the anchor ring convex ring 11 does not contact the fastener 300, and the contact area between the axial side of the anchor ring convex ring 11 and the flange ring 200 is close to 100%, further avoiding point contact or line contact between the anchor ring convex ring 11 and the flange ring 200, thus better meeting the standard requirements.

[0034] Please see Figure 3 In one embodiment of this utility model, along the axial direction of the anchoring ring 10, the width of the interlayer region 210 is T, and the thickness of the limiting block 400 is t, where 1 mm ≤ Tt ≤ 2 mm. The gap design between the limiting block 400 and the flange rings 200 on both sides achieves a good balance between the anchoring of the piping system and axial free thermal expansion, which not only meets the positioning accuracy requirements of nuclear-grade piping systems, but also avoids stress concentration and damage to the pipeline caused by thermal expansion.

[0035] Please see Figure 2 In one embodiment of this utility model, the support frame 100 adopts a frame-type support structure, that is, multiple horizontal beams and vertical beams are connected to form a three-dimensional rigid support frame. The frame-type support structure of the support frame 100 is simple to process and assemble. The rectangular or square outline can better fit the annular flange ring 200, which facilitates the installation of the flange ring 200 on the support frame 100 and the circumferential limiting of the flange ring 200 on the support frame 100.

[0036] Please see Figure 2In one embodiment of this utility model, the support device further includes multiple pads 500. Along the circumferential direction of the flange ring 200, the multiple pads 500 are relatively spaced apart on the support frame 100, and along the radial direction of the flange ring 200, the pads 500 abut against the outer periphery of the flange ring 200 to limit the radial displacement of the flange ring 200; the limiting block 400 is fixedly connected to the support frame 100 through the pads 500. Specifically, in this embodiment, there are four pads 500, which are welded to the horizontal and vertical beams in the upper, lower, left, and right directions of the frame-type support structure. By welding pads 500 of different widths, a flatter and more stable support plane is provided for the flange rings 200 on both sides, thereby reducing the design and manufacturing difficulty of the frame structure of the support frame 100.

[0037] Please see Figure 2 In one embodiment of this utility model, there are two limiting blocks 400, which are disposed opposite to each other on the outer periphery of the flange ring 200. Specifically, in this embodiment, the two limiting blocks 400 are respectively welded to two opposite pads 500, and the two limiting blocks 400 are embedded in the interlayer region 210. By reducing the number of limiting blocks 400, the welding difficulty is reduced, while the flange ring 200 can be limited on the support frame 100.

[0038] Please see Figure 2 In one embodiment of this utility model, along the radial direction of the anchoring ring 10, the outer diameter of the flange ring 200 is d, and the distance between the relatively disposed gaskets 500 is D, where 1 mm ≤ Dd ≤ 2 mm. The gap design between the gasket 500 and the flange rings 200 on both sides achieves a good balance between the anchoring of the piping system and radial free thermal expansion, which not only meets the positioning accuracy requirements of nuclear-grade piping systems, but also avoids stress concentration and damage to the pipeline caused by thermal expansion.

[0039] In one embodiment of this utility model, the frame-type support structure is made of square steel. The square steel has a rectangular cross-section, with the other four sides being flat, facilitating processing and welding. Furthermore, the square steel is a standard hot-rolled profile, resulting in low procurement costs and high inventory versatility, thus achieving rapid installation and cost control while meeting nuclear-grade seismic resistance requirements.

[0040] In one embodiment of this utility model, the flange ring 200 is a loose flange. The loose flange is slidably fitted onto the anchor ring straight pipe section 12 of the anchor ring 10 and arranged on both sides of the anchor ring convex ring 11, thereby reducing the difficulty of hole alignment when connecting the flange rings 200 on both sides through the fastener 300 and improving assembly efficiency. At the same time, the loose flange is a standard part with complete specifications, standardized structure and strong versatility. The support device only needs to replace different flange rings 200 to adapt to multiple specifications of the anchor ring straight pipe section 12, reducing the inventory of special spare parts. At the same time, as a standard part, the loose flange has good compatibility with the pipe diameter of the anchor ring straight pipe section 12 or HDPE pipe 20, which facilitates the inner diameter matching of the anchor ring straight pipe section 12 and the flange ring 200 to form surface contact, reducing the wear or friction of the support device on the pipeline.

[0041] Please see Figure 3 In one embodiment of this utility model, the fastener 300 includes a screw 310, a plurality of nuts 320 adapted to the screw 310, and a locking washer 330. Specifically, in this embodiment, the screw 310 of appropriate length can be cut according to actual assembly needs, i.e., the number of flange rings 200 to be fastened and the total thickness to be penetrated, without the need to specially purchase standard parts of a specific length, which helps to reduce procurement costs and material waste. During assembly, the screw 310 is inserted into the mounting holes of the flange rings 200 on both sides of the anchor ring convex ring 11. Along the axial direction of the anchor ring 10, at least one nut 320 is threaded onto the screw 310 on the outer side of each flange ring 200 away from the anchor ring convex ring 11. The locking washer 330 is located between the nut 320 and the anchor ring convex ring 11. By tightening the nut 320, the flange rings 200 on both sides are pressed and fixed, thereby stably forming the sandwich area 210.

[0042] Please see Figure 1 The second aspect of this utility model provides a pipe connection structure for a nuclear-grade HDPE pipe system. The pipe connection structure includes an anchor ring 10 and a support device as described above. The support device connects to the anchor ring 10 to restrict its displacement. Simultaneously, the anchor ring 10 makes surface contact with the flange ring 200, preventing direct line or point contact between the anchor ring convex ring 11 or the straight pipe section 12 of the anchor ring 10 and the support frame 100 of the support device, thereby reducing friction between the anchor ring 10 and the support device. During pipe system operation, the locations where friction occurs due to relative displacement between the support frame 100 and the flange ring 200 are all between metal structural components, improving the structural safety and service life of the pipe system.

[0043] In one embodiment of this utility model, the pipe connection structure further includes an HDPE pipe 20, which is connected to the anchoring ring 10 by heat fusion. The HDPE pipe 20 and the anchoring ring 10 can be heat-fused or welded using a capacitor sleeve, thereby achieving a rapid connection between the HDPE pipe 20 and the straight pipe section 12 of the anchoring ring.

[0044] The third aspect of this utility model also provides a nuclear-grade HDPE pipe system. The nuclear-grade HDPE pipe system of this embodiment includes the pipe connection structure of the above embodiments or the support device of any of the above embodiments. It should be noted that the nuclear-grade HDPE pipe system of this embodiment may also include conventional pipe system components in existing HDPE pipe systems such as valves and instruments, which will not be described in detail here.

[0045] This invention proposes a support device, pipe connection structure, and HDPE pipe system for nuclear-grade HDPE pipe systems. In this support device, flange rings are fitted onto the straight pipe sections of the anchor rings on both sides of the anchor ring convex ring, and fastened with fasteners to form a sandwich area. The anchor ring convex ring of the anchor ring is embedded in the sandwich area, so that the anchor ring convex ring and the flange ring form a surface contact. At the same time, the anchor ring also maintains surface contact with the flange ring in the radial direction, avoiding line contact or point contact between the anchor ring and the support frame. This significantly reduces the friction and wear of the anchor ring by the support device, greatly reduces the stress concentration phenomenon of the anchor ring, and improves the structural safety and service life of the pipe system. It addresses the technical problem of point contact or line contact between existing support structures and high-density polyethylene pipes.

[0046] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A support device for a nuclear-grade HDPE pipe system, characterized in that, Anchor rings for supporting the HDPE pipe system; the anchor rings are provided with anchor ring protrusions; the support device includes: Support frame; A flange ring is fitted onto the anchoring ring and located on both sides of the anchoring ring's convex ring, forming a sandwich area between the flange rings on both sides; the flange ring is mounted on the support frame; Fasteners are used to secure the flange rings on both sides. Wherein, along the radial direction of the anchoring ring, the anchoring ring protrusion is embedded in the interlayer region to limit the axial and / or radial displacement of the anchoring ring relative to the support frame.

2. The support device according to claim 1, characterized in that, The support device further includes multiple limiting blocks, which are spaced apart along the circumferential direction of the flange ring and are respectively fixedly connected to the support frame to limit the axial and / or radial displacement of the flange ring relative to the support frame.

3. The support device according to claim 2, characterized in that, One end of the limiting block is fixedly connected to the support frame, and the other end extends to the interlayer area.

4. The support device according to claim 3, characterized in that, The outer diameter of the anchoring ring protrusion is smaller than the minimum radial dimension of the circle containing the inner edges of the plurality of mounting holes of the flange ring.

5. The support device according to claim 3, characterized in that, Along the axial direction of the anchoring ring, the width of the interlayer region is T, and the thickness of the limiting block is t, where 1 mm ≤ Tt ≤ 2 mm.

6. The support device according to claim 2, characterized in that, The support frame adopts a frame-type support structure.

7. The support device according to claim 6, characterized in that, The support device further includes multiple pads, which are arranged at intervals on the support frame along the circumferential direction of the flange ring; and along the radial direction of the flange ring, the pads abut against the outer periphery of the flange ring to limit the radial displacement of the flange ring; the limiting block is fixedly connected to the support frame through the pads.

8. The support device according to claim 7, characterized in that, The number of limiting blocks is two, and the two limiting blocks are disposed opposite to each other on the outer periphery of the flange ring.

9. The support device according to claim 7, characterized in that, Along the radial direction of the anchoring ring, the outer diameter of the flange ring is d, and the spacing between the relatively arranged pads is D, where 1 mm ≤ Dd ≤ 2 mm.

10. The support device according to claim 6, characterized in that, The frame-type support structure is made of square steel.

11. The support device according to claim 1, characterized in that, The flange ring is a slip-on flange.

12. The support device according to claim 1, characterized in that, The fastener includes a screw and a plurality of nuts adapted to the screw.

13. A pipe connection structure for a nuclear-grade HDPE pipe system, characterized in that, The pipe connection structure includes an anchoring ring and a support device as described in any one of claims 1 to 12, wherein the support device connects the anchoring ring to restrict the displacement of the anchoring ring.

14. The pipe connection structure according to claim 13, characterized in that, The pipe connection structure also includes an HDPE pipe, which is connected to the anchoring ring by heat fusion.

15. A nuclear-grade HDPE pipe system, characterized in that, Includes the pipe connection structure as described in claim 14.

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