Built-in multi-support fixing device and rigid power transmission pipeline

Abstract

The invention provides a built-in multi-support fixing device and a rigid power transmission pipeline, the built-in multi-support fixing device comprises a multi-support fixing piece, a moving assembly, a grounding assembly and a particle trapper, the multi-support fixing piece comprises a center hole arranged in a penetrating mode and bosses arranged around the center hole at intervals, and the free end of at least one boss is provided with the moving assembly; the free end of at least one boss is provided with a grounding assembly, the center hole of the multi-supporting fixing piece is electrically isolated from the moving assembly and the grounding assembly, the moving assembly and the grounding assembly can move in the direction when bearing the acting force in the axial direction of the center hole, and the moving assembly and the grounding assembly form supporting points respectively. And equipotential is formed through the particle catcher. In the invention, the built-in multi-support fixing device supports the conductor in the shell in a built-in manner, so that the butt joint surfaces of the shell can be reduced, thereby reducing gas leakage points and reducing the gas leakage risk of sulfur hexafluoride.

Description

Technical Field

[0001] The invention relates to a fixing technology for a conductor and a shell in a rigid power transmission pipeline, and in particular to a built-in multi-support fixing device and a rigid power transmission pipeline. Background Art

[0002] GIL (short for "gas insulated metal enclosed transmission line") / GIS (short for "gas insulated metal enclosed switch") busbars are both a type of rigid transmission pipeline structure, with an aluminum tubular shell on the outside and an aluminum conductor on the inside. The conductor is supported inside the shell, and the two form a concentric circle structure.

[0003] refer to Figure 1 It is understood that in the prior art, the rigid transmission pipeline is divided into several sections, each section includes a shell 10, an insulating basin 12, a conductor 13 and a contact seat 14, both ends of the shell 10 have flanges 11, and both sides of the insulating basin 12 are respectively equipped with contact seats 14. The insulating pot 12 is fixed to the flange 11 of the shell 10 by bolts, and the conductor 13 is plugged into the contact seat 14. A support ring 15 for reducing friction between the two and a conductive contact finger 16 for ensuring the connection between the two are provided. Since the conductor 13 causes a thermal effect after the current is passed through it, it will be displaced in the axial direction due to thermal expansion and contraction. If the expansion and contraction of the conductor 13 cannot be released, it will cause deformation, and in severe cases, the structure of the insulating pot 12 will be damaged. For this reason, a gap is left between the end of the conductor 13 and the contact seat 14 to compensate for the thermal expansion and contraction of the conductor 13. The contact seat 14 is fixed to the insert in the center of the insulating pot 12 by a stainless steel fastener 17 (such as a bolt), so that adjacent conductors 13 can be electrically connected through the contact seat 14, and the conductor 13 and the shell 10 are electrically isolated by the insulating pot 12, and the shell 10 is filled with sulfur hexafluoride (SF6) insulating gas.

[0004] Since rigid transmission pipelines are divided into several sections, there is a potential leakage point between adjacent sections. The risk of sulfur hexafluoride leakage increases, especially when the conductor is displaced due to thermal effects, causing the insulating basin structure to deform, age or even be damaged. Summary of the invention

[0005] The purpose of the present invention is to reduce the risk of air leakage of a rigid power transmission pipeline due to multiple shell butt surfaces, and to this end provide a built-in multi-support fixing device and a rigid power transmission pipeline.

[0006] The technical solution of the present invention is as follows:

[0007] A built-in multi-support fixing device includes a multi-support fixing piece, a moving component, a grounding component and a particle catcher, wherein the multi-support fixing piece includes a central hole arranged through and bosses arranged at intervals around the central hole, the moving component is arranged at a free end of at least one of the bosses, and the grounding component is arranged at a free end of at least one of the bosses. The central hole of the multi-support fixing piece is electrically isolated from the moving component and the grounding component. The moving component and the grounding component can move in the axial direction of the central hole when subjected to an axial force, and the moving component and the grounding component respectively form supporting points and form an equipotential through the particle catcher.

[0008] As an optional solution, the multi-support fixing member includes an insulating member, a high-voltage insert and a low-voltage insert, the insulating member has the center hole and the boss, the high-voltage insert is arranged at the center hole, the low-voltage insert is arranged at the free end of the boss and is connected to the moving component or the grounding component, and the high-voltage insert and the low-voltage insert are electrically isolated by the insulating member.

[0009] As an optional solution, the insulating member has three bosses, two of which are provided with the low-voltage inserts.

[0010] As an optional solution, the bosses are evenly distributed around the insulating member.

[0011] As an optional solution, the boss is in a state of being thinner and thicker from its free end to its root.

[0012] As an optional solution, the free end of the boss has a receiving groove, and the low-pressure insert is fixed in the receiving groove.

[0013] As an optional solution, the center of the low-voltage insert has an avoidance hole for arranging the moving component or the grounding component.

[0014] As an optional solution, the low-pressure insert protrudes from the end surface of the boss.

[0015] As an optional solution, the insulating member is made of epoxy resin.

[0016] As an optional solution, the insulating component, the low-voltage insert and the high-voltage insert are cast; and / or at least one end of the high-voltage insert extends out of the central hole.

[0017] As an optional solution, the high voltage insert adopts a conductive tube.

[0018] As an optional solution, at least one end of the high-pressure insert is provided with a slope section, in which the inner diameter increases closer to the end, and the slope section is used to embed a wedge-shaped piece.

[0019] As an optional solution, the grounding assembly includes a wear-resistant part and an electrode. The wear-resistant part is arranged on the boss and is made of a self-lubricating wear-resistant material. The electrode is fixed on the wear-resistant part.

[0020] As an optional solution, the grounding component also includes a support seat, an elastic member and a guide seat, the wear-resistant member is detachably connected to the support seat, the elastic member is sleeved on the support seat, the two ends of the elastic member respectively abut against the limiting portion of the support seat and the boss, the guide seat is detachably connected to the boss and is used to guide the movement direction of the wear-resistant member.

[0021] As an optional solution, the wear-resistant part includes an end plate and a surrounding plate, the end plate is connected to the support seat via a first fastener, a mounting groove is provided on the end plate, two electrodes and the first fastener are provided in the mounting groove, the surrounding plate is connected to the edge of the end plate, and the support seat and the elastic part are built into the space enclosed by the surrounding plate.

[0022] As an optional solution, the support seat includes a column and the limiting portion, the first end of the column is located in the receiving groove of the free end of the boss, the second end of the column is detachably connected to the wear-resistant part, and the limiting portion is annular and is arranged at the second end of the column.

[0023] As an optional solution, the guide seat is annular, the guide seat is connected to the boss via a plurality of second fasteners, and the wear-resistant part is arranged around the guide hole of the guide seat.

[0024] As an optional solution, the elastic member is a coil spring, the inner side of the coil spring is the column of the support seat, and the outer side is the enclosure of the wear-resistant member.

[0025] As an optional solution, the moving assembly includes a base, a roller and a rotating shaft, the base is fixed to the boss through a plurality of third fasteners, the roller is arranged in a positioning hole of the base through the rotating shaft, and the roller can at least roll along the axial direction;

[0026] The base includes a baffle and a connecting plate, wherein the baffle surrounds the positioning hole, and the connecting plate is located at the outer circle of one end of the baffle and is connected to the boss.

[0027] As an optional solution, the particle trap includes a tube body, the multi-support fixture is built into the tube body, and the moving component and the grounding component are respectively located on the outside of the tube body.

[0028] As an optional solution, a fixing part corresponding to the boss is provided on the tube body, a positioning groove is formed at the fixing part on the outer side of the tube body, and a positioning protrusion is formed at the fixing part on the inner side of the tube body, the positioning groove is used to position the moving component or the grounding component, and the positioning protrusion is used to position the boss.

[0029] As an optional solution, a plurality of grid holes are provided on the tube body.

[0030] As an optional solution, the tube body is made of non-magnetic conductive material.

[0031] A rigid power transmission pipeline comprises a shell, a conductor and any one of the above-mentioned built-in multi-support fixing devices, wherein the conductor is fixedly connected to the multi-support fixing member at the center hole, the grounding component and the moving component are respectively supported on the inner wall of the shell and can move axially relative to the shell as the conductor expands and contracts, the grounding component is electrically connected to the shell, and a plurality of the built-in multi-support fixing devices are arranged at intervals on the conductor.

[0032] The present invention has at least the following beneficial effects:

[0033] The present invention uses a multi-support fixture as a main component for connecting the conductor and the shell, and forms multiple support points inside the shell by means of a moving component and a grounding component arranged on the multi-support fixture, and installs the conductor in the shell, that is, the built-in multi-support fixture installs the conductor in a manner of being built into the shell. During the installation process, the assembled built-in multi-support fixture and the conductor are pushed into the shell together. During the actual application process, firstly, when the conductor is energized to generate a thermal effect, the built-in multi-support fixture can move axially along the inner wall of the shell as the conductor expands and contracts. Secondly, the moving component and the grounding component form an equipotential with the shell and are grounded, and no floating potential is generated. The normal operation of the conductor is guaranteed by these two points. Based on the built-in multi-support fixture and its application method, the requirements for the length of the shell are reduced. Compared with the prior art, the existing multiple sections of the shell can be merged into one section of the shell, or even the shell can be directly produced according to the total length required by the working condition without segmentation. It is sufficient to install a built-in multi-support fixture on the conductor every other section, thereby reducing the docking surface of the shell, thereby reducing the leakage points and reducing the risk of sulfur hexafluoride leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The technical features and advantages of the present invention will be more fully understood by referring to the following detailed description in conjunction with the accompanying drawings.

[0035] Figure 1 A cross-sectional view of a local section of a rigid power transmission pipeline in the prior art.

[0036] Figure 2 It is an exploded view of the built-in multi-support fixing device according to an embodiment of the present invention.

[0037] Figure 3 This is an exploded view of the built-in multi-support fixing device of an embodiment of the present invention. Since the high-voltage insert, the low-voltage insert and the insulating part are cast, in order to reflect the structural relationship between the three, the figure uses colors to distinguish the three, so a model diagram is used for illustration.

[0038] Figure 4 4 is a cross-sectional view of a built-in multi-support fixing device according to an embodiment of the present invention.

[0039] Figure 5 It is a schematic structural diagram of a multi-support fixing member according to an embodiment of the present invention from one viewing angle.

[0040] Figure 6 It is a schematic structural diagram of the multi-support fixing member of an embodiment of the present invention from another perspective.

[0041] Figure 7 Schematic diagram of the structure of a grounding assembly according to an embodiment of the present invention.

[0042] Figure 8 It is a cross-sectional view of the grounding component of an embodiment of the present invention. In order to intuitively show the internal structure of the grounding component, a model diagram is used.

[0043] Fig. 9 It is a schematic diagram of the structure of the mobile component of an embodiment of the present invention.

[0044] Fig.10 It is a cross-sectional view of the moving component of the embodiment of the present invention. In order to intuitively show the internal structure of the moving component, a model diagram is used.

[0045] Fig.11 is a cross-sectional view of a rigid power transmission pipeline according to an embodiment of the present invention.

[0046] Fig.12 It is a schematic cross-sectional view of a rigid power transmission pipeline according to an embodiment of the present invention.

[0047] Fig.13 It is a schematic diagram of a rigid power transmission pipeline according to an embodiment of the present invention. In order to intuitively reflect the relationship between the shell, the conductor and the built-in multi-support fixture, a model diagram is used, and the shell is made transparent and partially cut open.

[0048] Fig.14 It is a schematic diagram of a rigid power transmission pipeline according to an embodiment of the present invention, which adopts a model diagram and partially cuts open the shell to intuitively reflect the relationship between the shell, the conductor and the built-in multi-support fixing device.

[0049] Reference numerals:

[0050] Prior art: 10. Shell; 11. Flange; 12. Insulating basin; 13. Conductor; 14. Contact seat; 15. Support ring; 16. Conductive contact finger; 17. Fastener.

[0051] The present invention: 2. Shell; 3. Conductor; 4. Multi-support fixing member; 41. Insulator; 411. Center hole; 412. Boss; 413. Free end; 414. Root; 42. High-voltage insert; 421. Slope section; 43. Low-voltage insert; 431. Avoidance hole; 5. Moving assembly; 51. Base; 511. Baffle; 512. Connecting plate; 52. Roller; 53. Rotating shaft; 54. Third fastener; 6. Grounding assembly; 61, wear-resistant part; 611, end plate; 612, enclosure; 613, mounting groove; 62, electrode; 63, support seat; 631, column; 632, limit part; 64, elastic part; 65, guide seat; 66, first fastener; 67, second fastener; 7, particle catcher; 71, tube body; 72, grid hole; 73, positioning groove; 74, positioning protrusion; 75, fixing part; 8, wedge-shaped part. DETAILED DESCRIPTION

[0052] Unless otherwise defined, technical or scientific terms used in the present specification and claims shall have the common meanings understood by persons having ordinary skills in the technical field to which the present invention belongs.

[0053] The present invention provides a built-in multi-support fixing device and a rigid power transmission pipeline, wherein the built-in multi-support fixing device can be applied to the rigid power transmission pipeline. Figure 2-10 The built-in multi-support fixture is shown. Figure 11-14 The application of the built-in multi-support fixture in the rigid power transmission pipeline is illustrated. For ease of understanding, it is first explained from the perspective of the rigid power transmission pipeline, and then other applications of the built-in multi-support fixture are further explained.

[0054] Understand in conjunction with 2-14. An embodiment of the present invention provides a rigid power transmission pipeline, including a shell 2, a conductor 3, and a built-in multi-support fixture, wherein the shell 2 is a tubular structure made of non-magnetic conductive material, the conductor 3 is a rod-shaped structure made of high-conductivity materials such as aluminum alloy or copper, and the built-in multi-support fixture is used to support the conductor 3 on the shell 2 from the inside of the shell 2.

[0055] The built-in multi-support fixture includes a multi-support fixture 4, a moving component 5, a grounding component 6 and a particle trap 7. The multi-support fixture 4 is used as a skeleton structure for supporting the conductor 3, including a central hole 411 provided therethrough and bosses 412 provided at intervals around the central hole 411. The conductor 3 passes through the central hole 411 and is fixedly connected to the multi-support fixture 4 at the central hole 411; the end of the boss 412 that is farther from the central hole 411 is its free end 413, and the other end is a root 414. The free end 413 of the boss 412 is provided with a moving component 5 or a grounding component 6, wherein at least one boss 412 is provided with a moving component 5, and at least one boss 412 is provided with a grounding component 6, and the grounding component 6 and the moving component 5 are provided with a grounding component 6. The components 5 are respectively supported on the inner wall of the shell 2 to form a plurality of supporting points for supporting the conductor 3. The movable component 5 and the grounding component 6 can move in the axial direction when subjected to the axial force of the center hole 411, so that they can move axially relative to the shell 2 with the thermal expansion and contraction of the conductor 3. The center hole 411 of the multi-support fixing component 4 is electrically isolated from the movable component 5 and the grounding component 6, and correspondingly, the conductor 3 and the shell 2 are electrically isolated; the movable component 5 and the grounding component 6 form an equipotential through the particle trap 7, and the grounding component 6 is electrically conductive with the shell 2 to avoid the generation of a suspended potential inside the shell 2, thereby ensuring the safety of the pipeline.

[0056] The length of the shell 2 can be extended infinitely in theory. In order to ensure the supporting effect for the conductor 3, a built-in multi-support fixture is set at intervals. During the installation process, the assembled built-in multi-support fixture and the conductor 3 are pushed into the shell 2 together. During the actual application process, firstly, when the conductor 3 is energized to generate a thermal effect, the built-in multi-support fixture can move axially along the inner wall of the shell 2 as the conductor 3 expands and contracts, releasing the stress inside the conductor 3. Secondly, the movable component 5 and the grounding component 6 form an equipotential with the shell 2 and are grounded, and no floating potential is generated. The normal operation of the conductor 3 is guaranteed by these two points. In addition, the present invention is particularly suitable for horizontally laid rigid power transmission pipelines. During laying, the grounding component can be located at the top of the built-in multi-support fixture and the shell is grounded.

[0057] In the embodiment of the present invention, the multi-support fixture 4 is used as the main component for connecting the conductor 3 and the housing 2. A plurality of support points are formed inside the housing 2 by means of the moving component 5 and the grounding component 6 arranged on the multi-support fixture 4, and the conductor 3 is installed in the housing 2. That is, the built-in multi-support fixture installs the conductor 3 in a manner of being built in the housing 2. Based on the built-in multi-support fixture and its application method, the requirement for the length of the housing 2 is reduced. Figure 1As for the prior art shown in the figure, the existing multiple sections of the shell 2 can be combined into one section of the shell 2, and even the length of the shell 2 at the construction site is the total length required for the construction, without segmentation. It is sufficient to install a built-in multi-support fixture on the conductor 3 every other section, thereby reducing the docking surface of the shell 2, thereby reducing the leakage points and reducing the risk of sulfur hexafluoride leakage. In addition, the use of the built-in multi-support fixture to install the conductor 3 is relatively Figure 1 The prior art shown reduces the number of assembly parts and lowers the matching requirements between parts, thereby improving assembly efficiency and reducing assembly costs.

[0058] In an embodiment of the present invention, the multi-support fixing member 4 includes an insulating member 41, a high-voltage insert 42 and a low-voltage insert 43. The insulating member 41 has the above-mentioned center hole 411 and the boss 412. The high-voltage insert 42 is arranged at the center hole 411, and is used to be fixedly connected to the conductor 3 and electrically conductive. The low-voltage insert 43 is arranged at the free end 413 of the boss 412 and is connected to the moving component 5 or the grounding component 6, and is used to be electrically conductive with the shell 2. The high-voltage insert 42 and the low-voltage insert 43 are electrically isolated by the insulating member 41, and accordingly, the conductor 3 and the shell 2 are electrically isolated.

[0059] Figure 2-14 In the illustrated embodiment, the center of the low-voltage insert 43 has an avoidance hole 431 for setting the movable component 5 and the grounding component 6. The avoidance hole 431 can be a through hole or a blind hole. The avoidance hole 431 makes room for the movable component 5 or the grounding component 6 to avoid, so that the space outside the boss 412 occupied by the movable component 5 and the grounding component 6 is relatively small. Accordingly, the distance between the boss 412 and the inner wall of the shell 2 is smaller, and the support is more stable.

[0060] Figure 2-14 In the illustrated embodiment, the insulating member 41 has three bosses 412, and a low-pressure insert 43 is provided at the free end 413 of each boss 412, so that three supporting points are formed between the multi-support fixture 4 and the housing 2. The provision of three supporting points can effectively ensure the supporting effect and facilitate the processing of the multi-support fixture 4. In other embodiments, as an alternative, the multi-support fixture 4 can also be provided with two or more bosses 412.

[0061] Figure 2-14 In the embodiment shown, the bosses 412 are evenly distributed around the insulating member 41, that is, two adjacent bosses 412 are distributed at an angle of 120°, so that the forces on the multiple support fixtures 4 and the housing 2 are more evenly distributed. In other embodiments, the bosses 412 may also be arranged in a non-uniform manner, which is also within the protection scope of the present invention.

[0062] Figure 2-14In the embodiment shown, the boss 412 is thinner and thicker from its free end 413 to its root 414, which can disperse the force borne by the free end 413 of the boss 412 to other parts of the multi-support fixture 4 through the root 414, thereby improving stability and reliability. In other embodiments, as an alternative, the boss 412 can be cylindrical or in other shapes.

[0063] Figure 2-14 In the illustrated embodiment, the free end 413 of the boss 412 has a receiving groove, and the low-pressure insert 43 is fixed in the receiving groove, so that the connection between the boss 412 and the low-pressure insert 43 is more stable. In other embodiments, as an alternative, a groove can be provided on the low-pressure insert 43 to connect the free end 413 of the boss 412, or other methods that can fix the two can be used.

[0064] Figure 2-14 In the illustrated embodiment, the low-pressure insert 43 protrudes from the end surface of the boss 412 . In other embodiments, as an alternative, a solution in which the surface of the low-pressure insert 43 is flush with or concave relative to the end surface of the boss 412 is also feasible.

[0065] Figure 2-14 In the embodiment shown, the insulating member 41 is made of epoxy resin, and the insulating member 41, the low-voltage insert 43 and the high-voltage insert 42 are cast and formed, and the above-mentioned accommodating groove is also formed during the casting. Figure 1 Compared with the prior art shown, the amount of epoxy resin used is reduced by 50%.

[0066] Figure 2-14 In the illustrated embodiment, both ends of the high-voltage insert 42 extend out of the center hole 411, thereby increasing the contact area with the conductor 3 and improving the supporting effect on the conductor 3. In other embodiments, only one end of the high-voltage insert 42 extends out of the center hole 411 or both ends of the high-voltage insert 42 do not extend out of the center hole 411, which is also within the protection scope of the present invention.

[0067] An axial limiting structure can be set between the high-voltage insert 42 and the insulating part 41 to strengthen the fixation. For example, a first axial limiting portion 632 is set on the outer surface of the high-voltage insert 42, and a second axial limiting portion 632 is provided in the center hole 411. The first axial limiting portion 632 and the second axial limiting portion 632 are clamped together. One of the first axial limiting portion 632 and the second axial limiting portion 632 is an annular groove, and the other is an annular protrusion structure. The shapes of the annular groove and the protrusion structure are matched, so that the stability between the high-voltage insert 42 and the insulating part 41 is enhanced.

[0068] Figure 2-14In the illustrated embodiment, the high voltage insert 42 is a conductive tube, which passes through the central hole 411, and has two ends extending out of the central hole 411. In other embodiments, the high voltage insert 42 includes two tubular structures, each of which is fixed to the two ends of the central hole 411, which is also within the protection scope of the present invention.

[0069] Figure 2-14 In the embodiment shown, slope sections 421 are respectively provided at both ends of the high-voltage insert 42. In the slope section 421, the inner diameter increases as it approaches the end. The slope section 421 is used to embed the wedge 8 to fix the conductor 3 to the high-voltage insert 42. Slopes are provided at both ends of the high-voltage insert 42, and the wedge 8 is embedded to fix the conductor 3. No matter which direction the conductor 3 tends to move axially, the wedge 8 can effectively prevent it, thereby improving stability. The wedge 8 is curved, and there is a gap between the two ends of the wedge 8. The wedge 8 can be understood as an open annular structure, which is convenient for embedding between the slope section 421 of the high-voltage insert 42 and the conductor 3. In other embodiments, as an alternative, only one end of the high-voltage insert 42 is provided with a slope section 421 to connect the wedge 8 or the high-voltage insert 42 and the conductor 3 are welded and fixed, which is also within the protection scope of the present invention.

[0070] The grounding assembly 6 includes a wear-resistant part 61 and an electrode 62. The wear-resistant part 61 is disposed on the boss 412. The wear-resistant part 61 is in contact with the housing 2 and can slide along the housing 2 when subjected to an axial force. The wear-resistant part 61 is made of a self-lubricating wear-resistant material, and its hardness is lower than that of the housing 2, so that the damage to the housing 2 is reduced when sliding relative to the housing 2. The electrode 62 is fixed on the wear-resistant part 61, and the electrode 62 and the housing 2 are electrically connected, so that the three low-voltage inserts 43 are connected to the housing 2.

[0071] Figure 2-14 In the illustrated embodiment, the grounding assembly 6 further includes a support seat 63, an elastic member 64 and a guide seat 65. The support seat 63 is detachably connected to a wear-resistant member 61. The elastic member 64 is sleeved on the support seat 63. The two ends of the elastic member 64 respectively abut against the limiting portion 632 of the support seat 63 and the boss 412. The guide seat 65 is detachably connected to the boss 412 and is used to guide the movement direction of the wear-resistant member 61. The elastic member 64 allows the support seat 63, the wear-resistant member 61 and the electrode 62 to float elastically in the direction close to or away from the boss 412. On the one hand, the wear-resistant member 61 and the electrode 62 can contact the shell 2. On the other hand, it can ensure that even if the wear-resistant member 61 and the electrode 62 are worn during use, they can still stably contact the shell 2. In other embodiments, the solution in which the wear-resistant member 61 is fixedly connected to the boss 412 is also within the protection scope of the present invention.

[0072] Figure 2-14In the illustrated embodiment, the wear-resistant part 61 includes an end plate 611 and a surrounding plate 612 which are integrally formed. The end plate 611 is connected to the support seat 63 via a first fastener 66. A mounting groove 613 is provided on the end plate 611. Two electrodes 62 are provided in the mounting groove 613. The electrodes 62 are installed by providing the mounting groove 613, which ensures that both the electrodes 62 and the wear-resistant part 61 can contact the shell 2. The first fastener 66 is provided in the mounting groove 613, and the end of the first fastener 66 is sunk into the mounting groove 613. The surrounding plate 612 is connected to the edge of the end plate 611 to form a cylindrical structure with an opening facing the boss 412, and the support seat 63 and the elastic member 64 are built in the space surrounded by the surrounding plate 612. In other embodiments, as a replacement means, the solution of not providing the surrounding plate 612 around the end plate 611 is also within the protection scope of the present invention.

[0073] Figure 2-14 In the illustrated embodiment, the support seat 63 includes a column 631 and a limiting portion 632, the first end of the column 631 is located in the receiving groove of the free end 413 of the boss 412, specifically, in the avoidance hole 431 of the low-pressure insert 43, the second end of the column 631 is detachably connected to the wear-resistant part 61, and the limiting portion 632 is annular and is arranged at the second end of the column 631. In other embodiments, as an alternative, the limiting portion 632 can adopt a block structure, or can be arranged at other positions of the main body, as long as it can be abutted by the elastic member 64.

[0074] Figure 2-14 In the embodiment shown, the elastic member 64 is a coil spring, the axis of the elastic member 64 is perpendicular to the axis of the conductor 3, the inner side of the coil spring is the column 631 of the support seat 63, and the outer side is the enclosure 612 of the wear-resistant member 61. In this solution, the elastic structure formed by the wear-resistant member 61, the support seat 63 and the elastic member 64 is more stable and reliable. In other embodiments, as an alternative, the elastic member 64 can also be a spring sheet, an elastic column or other elastic structure.

[0075] Figure 2-14 In the embodiment shown, the guide seat 65 is annular, and the guide seat 65 is connected to the boss 412 through a plurality of second fasteners 67, specifically, it is connected to the low-pressure insert 43 in the boss 412. The wear-resistant part 61 is arranged around the guide holes of the guide seat 65, so that the guide seat 65 is used for guidance to ensure the stability of movement. A limiting structure can also be provided on the guide seat 65 and / or the wear-resistant part 61, and the limiting structure is used to restrict the maximum movement stroke of the wear-resistant part 61 to prevent the wear-resistant part 61 from detaching from the boss 412 under the action of the elastic part 64. Here, it should be noted that the role of the limiting structure is mainly reflected in the assembly stage, but after the wear-resistant part 61 is assembled into the housing 2, the wear-resistant part 61 will not fall off the boss 412, so the setting of the limiting structure is an optional means.

[0076] Figure 2-14 In the illustrated embodiment, the moving assembly 5 includes a base 51, a roller 52 and a rotating shaft 53. The base 51 is fixed to the boss 412 via a plurality of third fasteners 54, and the base 51 and the boss 412 can be directly connected or connected via a low-pressure insert 43. The roller 52 is disposed in a positioning hole of the base 51 via the rotating shaft 53, and the roller 52 can at least roll along the axial direction. Figure 2-14 In the illustrated embodiment, the base 51 includes a baffle 511 and a connecting plate 512 . The baffle 511 forms a positioning hole. The connecting plate 512 is located at the outer ring of one end of the baffle 511 . The connecting plate 512 is connected to the low-pressure insert 43 via a third fastener 54 .

[0077] The particle catcher 7 is made of non-magnetic conductive material and is used to catch metal particles inside the shell 2. The particle catcher 7 encloses an installation space. The multi-support fixture 4 is fixedly connected to the particle catcher 7 and built into the installation space. The low-voltage insert 43 and the particle catcher 7 are electrically connected. The particle catcher 7 is fixedly connected and electrically connected to the shell 2 through the grounding component 6. In other words, the particle catcher 7 connects each low-voltage insert 43 and forms an equipotential with the shell 2. Therefore, adding the particle catcher 7 on the basis of the multi-support fixture 4 simultaneously plays multiple roles such as capturing metal particles, preventing floating potential, and supporting the conductor 3.

[0078] The particle trap 7 includes a tube body 71. The above-mentioned installation space is surrounded by the tube body 71. The outer diameter of the tube body 71 is smaller than the inner diameter of the shell 2, so that no friction will be generated between the two during installation, because no metal particles will be generated during assembly and application. A plurality of groups of grid holes 72 are arranged on the tube body 71. Each group of grid holes 72 is arranged in parallel. In each group, each grid hole 72 extends along the circumferential direction of the tube body 71 to form a long strip shape. The grid holes 72 serve as a particle trap. The metal particles inside the shell 2 float to the particle trap under the action of the electric field. After being captured by the grid holes 72, they cannot escape again.

[0079] The tube body 71 is provided with a fixing portion 75 corresponding to the low-voltage insert 43. On the outer surface of the tube body 71, a concave positioning groove 73 is formed at the position of the fixing portion 75. On the inner surface of the tube body 71, a positioning convex block 74 is formed at the position of the fixing portion 75. The multi-support fixing member 4 is quickly positioned by the positioning convex block 74, and the grounding component 6 or the moving component 5 is quickly positioned by the positioning groove 73, thereby improving the assembly efficiency. In other embodiments, as an alternative, a solution in which the positioning convex block 74 is formed on the outer surface of the tube body 71 and the positioning groove 73 is formed on the inner surface of the tube body 71, or a solution in which no positioning groove 73 and positioning convex block 74 are formed on the tube body 71, but a hole is pre-punched at the position where the wear-resistant block and the multi-support fixing member 4 are connected is also within the protection scope of the present invention.

[0080] The above combined with Figure 2-14 A rigid power transmission pipeline and a built-in multi-support fixture contained therein are explained. It should be noted that the rigid power transmission pipeline is an application of the built-in multi-support fixture, and the built-in multi-support fixture can also be used to install a first component into a second component in a built-in manner, wherein the first component can be a rod-shaped structure, and the second component can be a tubular structure. The first component passes through a center hole 411 and is fixedly connected to the multi-support fixture 4 at the center hole 411. The grounding component 6 and the moving component 5 are supported on the inner wall of the second component. When subjected to axial force, the grounding component 6 and the moving component 5 can move axially along the inner wall of the second component.

[0081] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0082] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A built-in multi-support fixing device, characterized in that: It includes a multi-support fixing part, a moving component, a grounding component and a particle trap, the multi-support fixing part includes a central hole set through and bosses set at intervals around the central hole, the moving component is set at a free end of at least one of the bosses, and the grounding component is set at a free end of at least one of the bosses. The central hole of the multi-support fixing part is electrically isolated from the moving component and the grounding component. The moving component and the grounding component can move in the axial direction of the central hole when subjected to the force acting in the axial direction of the central hole. The moving component and the grounding component respectively form support points and form equipotential through the particle trap.

2. The built-in multi-support fixing device according to claim 1, characterized in that: The multi-support fixing member includes an insulating member, a high-voltage insert and a low-voltage insert. The insulating member has the center hole and the boss. The high-voltage insert is arranged at the center hole. The low-voltage insert is arranged at the free end of the boss and is connected to the moving component or the grounding component. The high-voltage insert and the low-voltage insert are electrically isolated by the insulating member.

3. The built-in multi-support fixing device according to claim 2, characterized in that: The insulating part has three bosses, two of which are provided with the low-voltage inserts; and / or the bosses are evenly distributed around the insulating part; and / or the bosses are in a state from thin to thick from their free ends to their roots; and / or the free ends of the bosses have a receiving groove, in which the low-voltage insert is fixed; and / or the center of the low-voltage insert has a avoidance hole for setting the moving component or the grounding component; and / or the low-voltage insert protrudes from the end face of the boss; and / or the insulating part is made of epoxy resin; and / or the insulating part, the low-voltage insert and the high-voltage insert are cast; and / or at least one end of the high-voltage insert extends out of the center hole; and / or the high-voltage insert is made of a conductive tube; and / or at least one end of the high-voltage insert is provided with a slope section, in which the inner diameter increases closer to the end, and the slope section is used to embed a wedge.

4. The built-in multi-support fixing device according to claim 1, characterized in that: The grounding assembly comprises a wear-resistant part and an electrode. The wear-resistant part is arranged on the boss and is made of a self-lubricating wear-resistant material. The electrode is fixed on the wear-resistant part.

5. The built-in multi-support fixing device according to claim 4, characterized in that: The grounding assembly also includes a support seat, an elastic member and a guide seat. The wear-resistant member is detachably connected to the support seat. The elastic member is sleeved on the support seat. Both ends of the elastic member abut against the limiting portion of the support seat and the boss respectively. The guide seat is detachably connected to the boss and is used to guide the movement direction of the wear-resistant member.

6. The built-in multi-support fixing device according to claim 5, characterized in that: The wear-resistant part comprises an end plate and a surrounding plate, the end plate is connected to the support seat through a first fastener, a mounting groove is provided on the end plate, two electrodes and the first fastener are provided in the mounting groove, the surrounding plate is connected to the edge of the end plate, and the support seat and the elastic member are built in a space surrounded by the surrounding plate; And / or, the support seat comprises a column and the limiting portion, the first end of the column is located in the receiving groove of the free end of the boss, the second end of the column is detachably connected to the wear-resistant part, and the limiting portion is annular and is arranged at the second end of the column; And / or, the guide seat is annular, the guide seat is connected to the boss via a plurality of second fasteners, and the wear-resistant part is arranged around the guide hole of the guide seat; And / or, the elastic member is a coil spring, the inner side of the coil spring is the column of the support seat, and the outer side is the enclosure of the wear-resistant member.

7. The built-in multi-support fixing device according to claim 1, characterized in that: The moving assembly includes a base, a roller and a rotating shaft, the base is fixed to the boss through a plurality of third fasteners, the roller is arranged in a positioning hole of the base through the rotating shaft, and the roller can at least roll along the axial direction; The base comprises a baffle and a connecting plate, wherein the baffle surrounds the positioning hole, and the connecting plate is located at the outer circle of one end of the baffle and is connected to the boss.

8. The built-in multi-support fixing device according to any one of claims 1 to 7, characterized in that: The particle trap comprises a tube body, the multi-support fixing member is built in the tube body, and the moving component and the grounding component are respectively located outside the tube body.

9. The built-in multi-support fixing device according to claim 8, characterized in that: The tube body is provided with a fixing part corresponding to the boss one by one, a positioning groove is formed at the fixing part on the outer side of the tube body, and a positioning convex block is formed at the fixing part on the inner side of the tube body, the positioning groove is used to position the moving component or the grounding component, and the positioning convex block is used to position the boss; And / or, the tube body is provided with a plurality of grid holes; And / or, the tube body is made of non-magnetic conductive material.

10. A rigid power transmission pipeline, characterized in that: It comprises a shell, a conductor and the built-in multi-support fixing device as described in any one of claims 1 to 9, wherein the conductor is fixedly connected to the multi-support fixing member at the center hole, the grounding component and the moving component are respectively supported on the inner wall of the shell, and can move axially relative to the shell with the thermal expansion and contraction of the conductor, the grounding component is electrically connected to the shell, and a plurality of the built-in multi-support fixing devices are arranged at intervals on the conductor.

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