Multi-support fixing part, multi-support fixing assembly and rigid power transmission pipeline

Abstract

The utility model provides a multi-support fixed part, multi-support fixed assembly and rigid power transmission pipeline, multi-support fixed part includes insulator, high-voltage insert and low-voltage insert, the high-voltage insert is fixed in the center hole of insulator, the insulator is provided with a plurality of boss in the circumferential direction, the boss is fixed in the low-voltage insert, and the low-voltage insert is fixed in the boss. The low-voltage insert is fixed on the boss, the low-voltage insert and the high-voltage insert are electrically isolated through the insulating part, the low-voltage insert is used for being electrically conducted with the shell, and the high-voltage insert is used for being electrically conducted with the conductor. The multi-support fixing assembly is provided with a multi-support fixing piece, and the rigid power transmission pipeline is provided with the multi-support fixing assembly. According to the utility model, the number of assembling parts is reduced, the matching requirement between the parts is reduced, the assembling efficiency is improved, the assembling cost is reduced, the using amount of insulating parts is reduced by 50% compared with that of an insulating sprayer, and the economical efficiency is better.

Description

Technical Field

[0001] This utility model relates to the technology for fixing conductors and shells in rigid power transmission pipelines, and particularly to a multi-support fixing component, a multi-support fixing assembly, and a rigid power transmission pipeline. Background Technology

[0002] GIL (short for "Gas Insulated Metal Enclosed Transmission Line") and GIS (short for "Gas Insulated Metal Enclosed Switch") busbars are both types of rigid transmission pipeline structures. They are made of aluminum tubular shells on the outside and aluminum conductors on the inside. The conductors are supported inside the shells, forming a concentric circle structure. In vertical or inclined shaft conditions, such as in projects connecting the transformer room of a hydroelectric power station with the switch room using transmission pipelines, a support structure is needed to fix the conductors and aluminum tubes together to prevent the conductors from falling due to their own weight.

[0003] refer to Figure 1 In existing technology, flanges 11 are provided at both ends of the housing 10. Insulating basins 12 are typically provided on both sides of the housing 10 to support the conductor 13. The insulating basins 12 are fixed to the flanges 11 of the housing 10 by bolts. Contact seats 14 are mounted on the insulating basins 12, and the conductor 13 is inserted into the contact seats 14. A support ring 15 to reduce friction and a conductive finger 16 to ensure current flow are maintained between them are provided. A gap is left between the end of the conductor 13 and the contact seat 14 to compensate for thermal expansion and contraction of the conductor. The contact seat 14 is fixed to the insert in the center of the insulating basin 12 by stainless steel fasteners 17 (such as bolts), so that adjacent conductors 13 can be electrically connected through the contact seats 14. The conductor 13 and the housing 10 are electrically isolated by the insulating basins 12. In the case of operation in a vertical shaft, although the conductor 13 has a tendency to fall, it is confined within sections of the busbar due to the limiting effect of the insulating basins 12.

[0004] However, the complex assembly process of using insulated basins leads to low assembly efficiency and high assembly costs. Utility Model Content

[0005] The purpose of this utility model is to solve the problems of low assembly efficiency and high cost caused by the complex assembly of the connection structure between the conductor and the shell. To this end, this utility model proposes a multi-support fixing component, a multi-support fixing assembly, and a rigid power transmission pipeline.

[0006] The technical solution of this utility model is as follows:

[0007] A multi-support fastener is provided for being housed within a housing and for connecting a conductor to the housing. The multi-support fastener includes an insulating component, a high-voltage insert, and a low-voltage insert. The high-voltage insert is fixed at the central hole of the insulating component. The insulating component has several protrusions in the circumferential direction, and the low-voltage insert is fixed on the protrusions. The low-voltage insert and the high-voltage insert are electrically isolated by the insulating component. The low-voltage insert is electrically connected to the housing, and the high-voltage insert is electrically connected to the conductor.

[0008] As an alternative, the insulating member has three said bosses, and a low-voltage insert is provided at the free end of each said boss.

[0009] As an alternative, the bosses are evenly distributed around the insulating member.

[0010] As an alternative, the boss is tapered from its free end to its root.

[0011] As an alternative, the free end of the boss has a receiving groove, and the low-pressure insert is fixed in the receiving groove.

[0012] As an alternative, the low-pressure insert protrudes from the end face of the boss.

[0013] As an alternative, the insulating component is made of epoxy resin.

[0014] As an alternative, the insulating element, the low-voltage insert, and the high-voltage insert are cast into shape.

[0015] As an alternative, at least one end of the high-voltage insert extends out of the central hole.

[0016] As an alternative, the outer surface of the high-voltage insert is provided with a first axial limiting part, and the center hole has a second axial limiting part, and the first axial limiting part and the second axial limiting part are engaged.

[0017] As an alternative, the high-voltage insert is a conductive tube.

[0018] As an alternative, the high-voltage insert has a sloping section at at least one end, with the inner diameter of the sloping section increasing towards the end. The sloping section is used to embed a wedge to fix the conductor to the high-voltage insert.

[0019] A multi-support fixing assembly includes a particle trap and a multi-support fixing member as described above, wherein the multi-support fixing member is fixed within an installation space enclosed by the particle trap, the low-voltage insert is electrically connected to the particle trap, and the particle trap is used to be fixedly connected to and electrically connected to the housing.

[0020] As an alternative, the particle trap includes a tube as the main body and a flange located at the end of the tube. The tube is provided with the multiple support fasteners, and the flange is used to fix and connect to the flange at the end of the housing.

[0021] As an alternative, the main body of the particle trap is provided with grid holes.

[0022] As an alternative, the particle trap is made of a non-magnetic conductive material.

[0023] As an alternative, the outer diameter of the portion of the particle trap that extends into the housing is smaller than the inner diameter of the housing.

[0024] As an alternative, the main body of the particle trap has a fixing part that corresponds to each of the low-pressure inserts, and each fixing part is provided with a wear-resistant part for electrically connecting the low-pressure insert and the housing;

[0025] On the outer surface of the main body of the particle trap, a recessed positioning groove is formed at the position of the fixing part; on the inner surface of the tube, a positioning protrusion is formed at the position of the fixing part.

[0026] The fixing part is located at one end of the housing near the particle catcher.

[0027] As an alternative, the wear-resistant part is disposed in the positioning groove, the low-pressure insert abuts against the positioning protrusion, and the threaded connector passes through the wear-resistant part, the fixing part, and the low-pressure insert and fixes the three together.

[0028] The wear-resistant component protrudes from the outer surface of the main body of the particle trap and abuts against the housing to create a gap between the main body of the particle trap and the inner wall of the housing.

[0029] As an optional solution, the wear-resistant component includes a limiting base and a wear-resistant block disposed in a fixing groove formed by the base. The threaded connector is a T-screw. The wear-resistant block is provided with a countersunk hole. The T-screw passes through the countersunk hole, and the head of the T-screw is recessed into the countersunk hole.

[0030] The limiting base is made of aluminum alloy, the wear-resistant block is made of self-lubricating non-metallic material, and the T-screw is made of stainless steel.

[0031] A rigid power transmission pipeline includes a tubular shell, a conductor, and a multi-support fixing assembly as described in any of the preceding claims, wherein a particle trap of the multi-support fixing assembly is fixedly connected to the shell, and the conductor passes through the central hole and is fixedly connected to the high-voltage insert.

[0032] As an alternative, the end of the particle trap is detachably connected to the flange at the end of the housing.

[0033] As an alternative, the main body of the particle trap is built into the housing, with a gap between the main body and the inner wall of the housing.

[0034] As an alternative, wedge-shaped elements are embedded between the two ends of the high-voltage insert and the conductor, respectively. The wedge-shaped elements are curved and there is a gap between the two ends of the wedge-shaped elements.

[0035] As an alternative, the conductor and the housing are coaxial.

[0036] This utility model has at least the following beneficial effects:

[0037] First, using multi-support fasteners as the main components connecting the conductor and the housing reduces the number of assembly parts and lowers the fitting requirements between parts, thereby improving assembly efficiency and reducing assembly costs. Second, multi-support fasteners fix the conductor from the inside of the housing, reducing the amount of insulating parts used for electrical isolation between high-voltage and low-voltage inserts. Taking epoxy resin as an example, calculations show that the amount of epoxy resin used in the insulating parts is reduced by 50% compared to the insulating spray, making it more economical. Attached Figure Description

[0038] The technical features and advantages of this utility model can be more fully understood by taking into account the accompanying drawings and the following detailed description.

[0039] Figure 1 It is a cross-sectional view of a local section of a rigid power transmission pipeline in the prior art.

[0040] Figure 2 This is a three-dimensional structural diagram of the multi-support fixing component according to Embodiment 1 of this utility model.

[0041] Figure 3 This is a side view of the multi-support fixing component according to Embodiment 1 of this utility model.

[0042] Figure 4 This is an exploded view of the multi-support fixing component of Embodiment 2 of this utility model.

[0043] Figure 5This is an exploded view of the multi-support fixing component of Embodiment 2 of this utility model. Since the high-voltage insert, low-voltage insert and insulating component are cast and molded, in order to show the structural relationship between the three, the three are distinguished by color in the figure. Therefore, a model diagram is used for illustration.

[0044] Figure 6 This is a diagram of the multi-support fixing component in the application state of Embodiment 2 of this utility model. It can also be understood as a partial schematic diagram of the rigid power transmission pipeline in Embodiment 3. Considering that the lines in the white background black line drawing are messy from this perspective, a model diagram is used for illustration, and the shell is semi-transparent in the drawing.

[0045] Figure 7 This is a schematic diagram of the wear-resistant part and the threaded connection part in Embodiment 2 of this utility model.

[0046] Figure 8 This is a cross-sectional view of the wear-resistant part and the threaded connector in Embodiment 2 of this utility model. Since it is not easy to intuitively distinguish the limiting base and the wear-resistant block in the white background black line drawing, a model drawing is used for illustration, and the limiting base and the wear-resistant block are distinguished by color.

[0047] Figure 9 This is a cross-sectional view of the rigid power transmission pipeline according to Embodiment 3 of this utility model. It can also be understood as a cross-sectional view of the application state of multiple support fasteners or the application state of multiple support fastener components.

[0048] Figure 10 This is a side view of the rigid power transmission pipeline according to Embodiment 3 of this utility model.

[0049] Figure label:

[0050] Existing technology: 10. Housing; 11. Flange; 12. Insulating basin; 13. Conductor; 14. Contact base; 15. Support ring; 16. Conductive contact finger; 17. Fastener.

[0051] This utility model:

[0052] 2. Multi-support fastener; 21. Insulating component; 211. Center hole; 212. Boss; 213. Free end; 214. Root; 215. Receiving groove; 216. Second axial limiting part; 22. High-voltage insert; 221. First axial limiting part; 222. Sloping section; 23. Low-voltage insert; 3. Particle trap; 31. Installation space; 32. Tube body; 33. Flanged edge; 34. Grid hole; 35. Fixing part; 36. Positioning groove; 37. Positioning protrusion; 4. Wear-resistant component; 41. Limiting base; 411. Base plate; 412. Enclosure plate; 413. Fixing groove; 414. Smooth hole; 42. Wear-resistant block; 421. Countersunk hole; 5. Threaded connector; 51. Coarse section; 52. Fine section; 53. Threaded section; 6. Wedge-shaped component; 7. Housing; 71. Flange; 8. Conductor. Detailed Implementation

[0053] Unless otherwise defined, the technical or scientific terms used in this specification and claims shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0054] This utility model provides a multi-support fixing component, a multi-support fixing assembly, and a rigid power transmission pipeline. The multi-support fixing assembly can be used in a multi-support fixing system and in a rigid power transmission pipeline. Considering that the multi-support fixing assembly can be sold separately, and although the individual components involved in the fixing assembly can be transported to the construction site and assembled together with the conductor 8 and the shell 7 to form a rigid power transmission pipeline, it is not ruled out that, for the sake of ease of transportation and shortening the on-site construction period, it can be pre-assembled into a single product and transported to the construction site as a whole, and then connected to the conductor 8 and the shell 7. Therefore, the multi-support fixing component 2, the multi-support fixing assembly, and the rigid power transmission pipeline will be described sequentially below.

[0055] Example 1

[0056] refer to Figure 2 , Figure 3 as well as Figure 9This embodiment provides a multi-support fastener 2, applied in the field of rigid power transmission pipeline technology. The multi-support fastener 2 is used to be built into a housing 7 and connects the conductor 8 to the housing 7 to prevent the conductor 8 from falling out of the housing 7 under gravity. The multi-support fastener 2 includes an insulating component 21, a high-voltage insert 22, and a low-voltage insert 23. The insulating component 21 has a central hole 211, at which the high-voltage insert 22 is fixed. The insulating component 21 has several protrusions 212 in the circumferential direction, on which the low-voltage insert 23 is fixed. The low-voltage insert 23 and the high-voltage insert 22 are electrically isolated by the insulating component 21. The low-voltage insert 23 is used for electrical conduction with the housing 7. Structurally, the low-voltage insert 23 and the inner wall of the housing 7 directly or indirectly contact to form a support point, and multiple low-voltage inserts 23 form multiple support points. The high-voltage insert 22 is used for electrical conduction with the conductor 8, and the two are structurally fixedly connected.

[0057] In application, the conductor 8 can be directly fixed to the housing 7 using the multi-support fastener 2. Alternatively, based on reducing friction and generating metal particles, anti-wear function or particle-capturing function can be added before fixing the conductor 8 to the housing 7. Regardless of the application method, it has at least two advantages: First, using the multi-support fastener 2 as the main component connecting the conductor 8 and the housing 7 reduces the number of assembly parts and lowers the fitting requirements between parts, thereby improving assembly efficiency and reducing assembly costs. Second, the multi-support fastener 2 fixes the conductor 8 from the inside of the housing 7, reducing the amount of insulating component 21 used for electrical isolation of the high-voltage insert 22 and the low-voltage insert 23. Taking epoxy resin as an example, the amount of epoxy resin used in the insulating component 21 is reduced by 50% compared to the insulating spray, thus making it more economical.

[0058] In this embodiment, the insulating member 21 has three bosses 212, and a low-voltage insert 23 is provided at the free end 213 of each boss 212, thereby forming three support points between the multi-support fixing member 2 and the housing 7. The three support points can effectively ensure the support function and facilitate the processing of the multi-support fixing member 2. In other embodiments, as an alternative, the multi-support fixing member 2 may also be provided with two or more bosses 212.

[0059] In this embodiment, the bosses 212 are evenly distributed around the insulating member 21, that is, adjacent bosses 212 are distributed at a 120° angle, so that the force on the multiple supporting fasteners 2 and the housing 7 is more even. In other embodiments, the bosses 212 can also be arranged in a non-uniform manner, which is also within the protection scope of this utility model.

[0060] In this embodiment, the boss 212 is tapered from its free end 213 to its root 214, which can distribute the force borne by the free end 213 of the boss 212 to other parts of the multi-support fastener 2 through the root 214, thereby improving stability and reliability. In other embodiments, as an alternative, the boss 212 may be columnar or other shapes.

[0061] In this embodiment, the free end 213 of the boss 212 has a receiving groove 215, and the low-pressure insert 23 is fixed in the receiving groove 215, thereby making the connection between the boss 212 and the low-pressure insert 23 more stable. In other embodiments, as an alternative, a groove can be provided on the low-pressure insert 23 to connect the free end 213 of the boss 212, or other methods can be used to fix the two together.

[0062] In this embodiment, the low-pressure insert 23 protrudes from the end face of the boss 212 to directly or indirectly connect to the housing 7. In other embodiments, as an alternative, the surface of the low-pressure insert 23 may be flush with or recessed relative to the end face of the boss 212.

[0063] In this embodiment, the insulating component 21 is made of epoxy resin. The insulating component 21, the low-voltage insert 23 and the high-voltage insert 22 are cast and molded. The aforementioned receiving groove 215 is also formed during casting.

[0064] In this embodiment, both ends of the high-voltage insert 22 extend beyond the central hole 211, increasing the contact area with the conductor 8 and improving the support effect on the conductor 8. In other embodiments, having only one end of the high-voltage insert 22 extend beyond the central hole 211 or having neither end of the high-voltage insert 22 extend beyond the central hole 211 is also within the protection scope of this utility model.

[0065] The outer surface of the high-voltage insert 22 is provided with a first axial limiting portion 221, and a second axial limiting portion 216 is provided in the central hole 211. The first axial limiting portion 221 and the second axial limiting portion 216 are engaged, thereby enhancing the stability between the high-voltage insert 22 and the insulating member 21. In this embodiment, the first axial limiting portion 221 is an annular groove, and the second axial limiting portion 216 is an annular protrusion structure. The shapes of the annular groove and the protrusion structure are adapted to each other. In the axial direction, the length of the second axial limiting portion 216 accounts for about half the length of the insulating member 21, ensuring the reliability of the connection between the two. In other embodiments, as an alternative, the specific forms of the first axial limiting portion 221 and the second axial limiting portion 216 can be interchanged, or the first limiting portion and the second limiting portion can be replaced with a non-annular structure.

[0066] In this embodiment, the high-voltage insert 22 is a conductive tube that passes through the central hole 211 and extends out of the central hole 211 at both ends. In other embodiments, the high-voltage insert 22 includes two tubular structures, and the scheme in which each tubular structure is fixed to both ends of the central hole 211 is also within the protection scope of this utility model.

[0067] In this embodiment, the high-voltage insert 22 has sloped sections 222 at both ends. The inner diameter of the sloped sections 222 increases towards the end. These sections are used to embed wedge-shaped pieces 6 to fix the conductor 8 to the high-voltage insert 22. By providing slopes at both ends of the high-voltage insert 22 and embedding wedge-shaped pieces 6 to fix the conductor 8, the wedge-shaped pieces 6 effectively prevent any axial movement of the conductor 8, thereby improving stability. In other embodiments, as alternatives, the high-voltage insert 22 may have a sloped section 222 at only one end connected to the wedge-shaped piece 6, or the high-voltage insert 22 and the conductor 8 may be welded together; these are also within the scope of this invention.

[0068] Example 2

[0069] Combination Figure 4-9 Understanding. This embodiment provides a multi-support fixing assembly, including a particle trap 3 and a multi-support fixing member 2 as described above. The particle trap 3 is made of a non-magnetic conductive material and is used to trap metal particles inside the housing 7. The particle trap 3 encloses an installation space 31. The multi-support fixing member 2 is fixedly connected to the particle trap 3 and is built into the installation space 31. The low-voltage insert 23 is electrically connected to the particle trap 3. The particle trap 3 is used to fix and electrically connect to the housing 7. In other words, the multi-support fixing member 2, which is connected to the conductor 8, is fixed to the housing 7 through the particle trap 3. The particle trap 3 conducts the low-voltage inserts 23 and forms an equipotential with the housing 7. Therefore, adding the particle trap 3 to the multi-support fixing member 2 simultaneously serves multiple functions, including trapping metal particles, connecting the housing 7, supporting the conductor 8, and improving safety.

[0070] In this embodiment, the particle trap 3 includes a tube 32 as the main body and a flange 33 located at the end of the tube 32. The aforementioned installation space 31 is enclosed by the tube 32, meaning that multiple support fasteners 2 are provided inside the tube 32. The tube 32 is located inside the housing 7, and the outer diameter of the tube 32 is smaller than the inner diameter of the housing 7, so that no friction will occur between the two during installation. The flange 33 is used to fix and connect to the flange 71 at the end of the housing 7, thereby connecting the conductor 8 on the multiple support fasteners 2 to the housing 7.

[0071] In addition, the tube body 32 is provided with several sets of grid holes 34, each set of grid holes 34 is arranged in parallel, and in each set, each grid hole 34 extends along the circumference of the tube body 32 to form an elongated shape. The grid holes 34 act as particle traps. Under the action of the electric field, the metal particles inside the shell 7 drift to the particle traps and are captured by the grid holes 34, after which they can no longer escape.

[0072] In this embodiment, the main body of the particle trap 3 has a fixing part 35 corresponding to the low-voltage insert 23. Each fixing part 35 is provided with a wear-resistant part 4 for electrically connecting the low-voltage insert 23 and the housing 7. In other words, although the outer diameter of the tube 32 is smaller than the inner diameter of the housing 7, there is an indirect connection between the tube 32 and the housing 7. This connection is achieved by the wear-resistant part 4, and the wear-resistant part 4 is fixedly connected to the low-voltage insert 23 and electrically connected. Based on the foregoing information, the connection between the particle trap 3 and the housing 7 includes two parts: one is the detachable connection between the flange 33 and the flange 71, and the other is the connection between the tube 32 and the housing 7 through the wear-resistant part 4. These two parts of the connection effectively ensure the stability between the particle trap 3 and the housing 7, thereby ensuring a reliable connection between the conductor 8 and the housing 7.

[0073] In this embodiment, the fixing part 35 is located near the end of the particle trap 3 inside the housing 7, that is, the fixing part 35 is located between the middle region of the particle trap 3 and the end without the flange 71, which better ensures the coaxiality and stability of the particle trap 3 and the housing 7, and thus ensures the coaxiality and stability of the conductor 8 and the housing 7. In other embodiments, as an alternative, the fixing part 35 may also be located at other positions on the tube body 32.

[0074] In this embodiment, a recessed positioning groove 36 is formed on the outer surface of the main body (i.e., tube 32) of the particle trap 3 at the position of the fixing part 35, and a positioning protrusion 37 is formed on the inner surface of the tube 32 at the position of the fixing part 35. The positioning protrusion 37 is used to quickly position the multi-support fixing member 2, and the positioning groove 36 is used to quickly position the wear-resistant member 4, thereby improving assembly efficiency. In other embodiments, as an alternative, a solution in which the positioning protrusion 37 is formed on the outer surface of the tube 32 and the positioning groove 36 is formed on the inner surface of the tube 32, or a solution in which the positioning groove 36 and the positioning protrusion 37 are not made on the tube 32, but holes are pre-drilled at the position connecting the wear-resistant member 42 and the multi-support fixing member 2, is also within the protection scope of this utility model.

[0075] In this embodiment, as mentioned above, the wear-resistant component 4 is disposed in the positioning groove, the low-pressure insert 23 abuts against the positioning protrusion 37, and the threaded connector 5 passes through the wear-resistant component 4, the fixing part 35, and the low-pressure insert 23 and fixes the three together. The use of the threaded connector 5 to fix the three together results in high overall structural rigidity, which can withstand the weight and temperature stress of the conductor 8 and effectively prevent the wear-resistant component 4 from falling off when the rigid power transmission pipeline is arranged tilted or vertically. The wear-resistant component 4 protrudes from the outer surface of the main body of the particle trap 3 and is used to abut against the housing 7 so that there is a gap between the tube 32 and the inner wall of the housing 7. Therefore, no hard friction will occur between the tube 32 and the housing 7 during installation.

[0076] In this embodiment, the wear-resistant component 4 includes a limiting base 4 and a wear-resistant block 42. The limiting base 4 is made of aluminum alloy and includes an integrally formed base plate 411 and a surrounding plate 412. One end of the surrounding plate 412 is connected to the edge of the base plate 411, thereby forming a fixing groove 413. The base plate 411 is provided with four through holes 414 for threaded connectors 5 to pass through. The wear-resistant block 42 is made of a self-lubricating non-metallic material and is provided with four countersunk holes 421. The smaller diameter hole in the countersunk hole 421 is larger than the diameter of the through hole 414 on the base plate 411, so that the countersunk hole 421 and its corresponding through hole 414 form two steps. These two steps correspond to the head of the threaded connector 5 using a T-screw, i.e., as shown in the figure. Figure 8 As shown, the head of the T-screw includes a thick section 51 and a thin section 52. The diameter of the thin section 52 is larger than the diameter of the threaded section 53 of the T-screw. The end face at the connection between the thin section 52 and the threaded section 53 is attached to the base plate 411. The end face at the connection between the thick section 51 and the thin section 52 is attached to the step on the countersunk hole 421. The head of the T-screw is recessed into the countersunk hole 421 and will not rub against the housing 7, thus avoiding the generation of metal particles due to friction. In addition, the T-screw is made of stainless steel. In this embodiment, the wear-resistant block 42, the limiting base 4, the particle trap 3, and the multi-support fastener 2 are connected together by the T-screw, which improves the assembly efficiency.

[0077] Example 3

[0078] Combination Figure 2-10 Understood. This embodiment provides a rigid power transmission pipeline, including a tubular shell 7, a conductor 8, and a multi-support fixing assembly as described above. The shell 7 is made of a non-magnetic conductive material, and the conductor 8 is made of a high-conductivity material such as aluminum alloy or copper. The particle trap 3 of the multi-support fixing assembly is fixedly connected to the shell 7. The conductor 8 passes through the central hole 211 and is fixedly connected to the high-voltage insert 22. The conductor 8 and the shell 7 are coaxial.

[0079] As can be seen from the above, in this embodiment, the end of the particle trap 3 is detachably connected to the flange 71 at the end of the housing 7; the main body of the particle trap 3 (i.e., the tube 32) is built into the housing 7, and there is a gap between the tube 32 and the inner wall of the housing 7; wedge-shaped pieces 6 are respectively embedded between the two ends of the high voltage insert 22 and the conductor 8. The wedge-shaped pieces 6 are curved, and there is a gap between the two ends of the wedge-shaped pieces 6. The wedge-shaped pieces 6 can be understood as an annular structure with an opening, which is convenient to be embedded between the slope section 222 of the high voltage insert 22 and the conductor 8.

[0080] It should be noted that the wedge-shaped member 6 can be pre-assembled into the slope section 222 as part of the multi-support fixing member 2 or the multi-support fixing assembly, or it can be assembled as part of the rigid power transmission pipeline without being included in the multi-support fixing member 2 or the multi-support fixing assembly or pre-assembled into the slope section 222. However, for the sake of easy and intuitive understanding of the connection relationship between the wedge-shaped member 6 and the high-voltage insert 22, Figure 4 and Figure 5 A wedge-shaped component 6 was added.

[0081] Furthermore, the terms "first," "second," etc., 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. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0082] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A multi-support fastener, characterized in that, For being built into a housing and connecting a conductor to the housing, the multi-support fixing member includes an insulating member, a high-voltage insert, and a low-voltage insert. The high-voltage insert is fixed at the central hole of the insulating member. The insulating member has several protrusions in the circumferential direction. The low-voltage insert is fixed on the protrusions. The low-voltage insert and the high-voltage insert are electrically isolated by the insulating member. The low-voltage insert is used to be electrically connected to the housing, and the high-voltage insert is used to be electrically connected to the conductor.

2. The multi-support fastener according to claim 1, characterized in that, The insulating component has three protrusions, and each protrusion has a low-voltage insert at its free end; and / or, the protrusions are evenly distributed around the insulating component; and / or, the protrusions are tapered from their free ends to their roots; and / or, the free ends of the protrusions have receiving grooves in which the low-voltage inserts are fixed; and / or, the low-voltage inserts protrude from the end faces of the protrusions; and / or, the insulating component is made of epoxy resin; and / or, the insulating component, the low-voltage inserts, and the high-voltage inserts are cast.

3. The multi-support fastener according to claim 1, characterized in that, At least one end of the high-voltage insert extends out of the central hole; and / or, the outer surface of the high-voltage insert is provided with a first axial limiting portion, and the central hole has a second axial limiting portion, the first axial limiting portion and the second axial limiting portion being engaged; and / or, the high-voltage insert is a conductive tube; and / or, at least one end of the high-voltage insert is provided with a sloped section, in which the inner diameter is larger closer to the end, the sloped section is used to embed a wedge to fix the conductor to the high-voltage insert.

4. A multi-support fixing component, characterized in that, The device includes a particle trap and a multi-support fastener as described in any one of claims 1-3, wherein the multi-support fastener is fixed within the installation space enclosed by the particle trap, the low-voltage insert is electrically connected to the particle trap, and the particle trap is used to be fixedly connected to and electrically connected to the housing.

5. The multi-support fixing assembly according to claim 4, characterized in that, The particle trap includes a tube as the main body and a flange located at the end of the tube. The tube is provided with the multiple support fasteners, and the flange is used to fix it to the flange at the end of the housing. And / or, the main body of the particle trap is provided with grid holes. And / or, the particle trap is made of a non-magnetic conductive material. And / or, the outer diameter of the portion of the particle trap that extends into the housing is smaller than the inner diameter of the housing.

6. The multi-support fixing assembly according to claim 5, characterized in that, The main body of the particle trap has a fixing part that corresponds to the low-pressure insert, and each fixing part is provided with a wear-resistant part for electrically connecting the low-pressure insert and the housing; On the outer surface of the main body of the particle trap, a recessed positioning groove is formed at the position of the fixing part; on the inner surface of the tube, a positioning protrusion is formed at the position of the fixing part. The fixing part is located at one end of the housing near the particle catcher.

7. The multi-support fixing assembly according to claim 6, characterized in that, The wear-resistant part is disposed in the positioning groove, the low-pressure insert abuts against the positioning protrusion, and the threaded connector passes through the wear-resistant part, the fixing part and the low-pressure insert and fixes the three together. The wear-resistant component protrudes from the outer surface of the main body of the particle trap and abuts against the housing to create a gap between the main body of the particle trap and the inner wall of the housing.

8. The multi-support fixing assembly according to claim 7, characterized in that, The wear-resistant component includes a limiting base and a wear-resistant block disposed in a fixing groove formed by the base. The threaded connector is a T-screw. The wear-resistant block is provided with a countersunk hole. The T-screw passes through the countersunk hole and the head of the T-screw is recessed into the countersunk hole. The limiting base is made of aluminum alloy, the wear-resistant block is made of self-lubricating non-metallic material, and the T-screw is made of stainless steel.

9. A rigid power transmission pipeline, characterized in that, It includes a tubular housing, a conductor, and a multi-support fixing assembly as described in any one of claims 4-8, wherein the particle trap of the multi-support fixing assembly is fixedly connected to the housing, and the conductor passes through the central hole and is fixedly connected to the high-voltage insert.

10. The rigid power transmission pipeline according to claim 9, characterized in that, The end of the particle trap is detachably connected to the flange at the end of the housing; and / or, the main body of the particle trap is built into the housing, with a gap between the main body and the inner wall of the housing; and / or, wedges are respectively embedded between the two ends of the high-voltage insert and the conductor, the wedges being curved and having a gap between the two ends of the wedges; and / or, the conductor and the housing are coaxial.

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