Insulation shear bolt, insulation connection structure, magnet coil and nuclear fusion device
By combining the metal mandrel and impregnated glass fiber ribbon in the insulating bolts, and using threaded or knurled structures, the shortcomings of existing insulating bolts under large loads and shear direction loads are solved, and efficient insulation and Load bearing avoids the formation of vortex current and ensures the stable operation of the equipment.
Patent Information
- Application Number
- CN202421338384.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-13
- Publication Date
- 2025-01-17
- Estimated Expiration
- 2034-06-13
AI Technical Summary
The existing insulating bolts have limited load capacity when they are subjected to large load conditions and shear-oriented loads, and the formation of eddy currents cannot be effectively avoided.
An insulating shear bolt was designed, using a metal mandrel and an insulating outer layer of glass fiber ribbon impregnated with epoxy resin, combined with threaded or knurled structures to enhance friction and ensure electrical isolation through insulating connection structures and metal gaskets. and mechanically stable.
It realizes the ability to withstand axial and shear direction loads under large load conditions, extends the service life, and avoids the formation of vortex currents, ensuring the stable operation of the equipment.
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Figure CN222363253U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of connecting fasteners, and specifically to an insulating shear bolt, an insulating connection structure, a magnet coil and a nuclear fusion device. Background Art
[0002] The support structure of the magnetic coil (e.g., TF coil) used in the magnetic confinement nuclear fusion device (e.g., Tokamak device) needs to withstand very large electromagnetic forces, and in order to avoid the formation of eddy currents, the various segments need to be insulated. Therefore, an insulating bolt is needed that can ensure the insulation of the connected objects and withstand a large load.
[0003] Currently, common insulating bolts or screws include nylon screws, and there are also insulating screws made of PEEK, POM, epoxy, ceramic, etc. These screws have limited load-bearing capacity and cannot be used in working conditions with large loads. Moreover, most of them are full-threaded and cannot withstand loads in the shear direction.
[0004] In view of this, this application is hereby filed. Utility Model Content
[0005] The purpose of the present application is to provide an insulating shear bolt, an insulating connection structure, a magnet coil and a nuclear fusion device to solve the technical problem that the currently common insulating bolts cannot be used in working conditions with large loads and cannot withstand loads in the shear direction.
[0006] To achieve one of the above purposes, this application provides the following technical solutions:
[0007] An insulating shear bolt comprises a metal core shaft, an insulating outer layer is sleeved on the middle section of the metal core shaft, external threads are arranged at both ends of the metal core shaft, and slots are arranged between the insulating outer layer and the external threads at both ends.
[0008] Furthermore, grooves or knurling are arranged on the surface of the middle section of the metal core shaft which is in contact with the insulating outer layer.
[0009] Furthermore, the insulating outer layer is a glass fiber ribbon impregnated with epoxy resin.
[0010] Furthermore, the diameter of the glass fiber ribbon is greater than the middle diameter of the metal core shaft.
[0011] To achieve the second of the above objectives, this application provides the following technical solutions:
[0012] An insulating connection structure comprises the insulating shear bolt, a first connecting member, an insulating plate and a second connecting member as described above, wherein the first connecting member, the insulating plate and the second connecting member are all provided with through holes, and the insulating shear bolt passes through the first connecting member, the insulating plate and the second connecting member in sequence to connect them, and nuts matching the external threads are provided at both ends of the insulating shear bolt.
[0013] Furthermore, insulating gaskets are provided between the nuts at both ends of the insulating shear bolt and the first connecting member and the second connecting member.
[0014] Furthermore, a metal gasket is arranged between the insulating gasket and the nut.
[0015] Furthermore, the metal gasket is arranged at the slot.
[0016] To achieve the third of the above objectives, this application provides the following technical solutions:
[0017] A magnetic coil comprises the insulating shear bolt as described above, or the insulating connection structure as described above.
[0018] To achieve the fourth objective above, this application provides the following technical solutions:
[0019] A nuclear fusion device comprises the insulating shear bolt as described above, or the insulating connection structure as described above, or the magnetic coil as described above.
[0020] Compared with the prior art, the insulated shear bolt, insulated connection structure, magnet coil and nuclear fusion device proposed in this application have the following technical effects:
[0021] 1. The insulated shear bolt proposed in the present application is composed of a metal core shaft with threads or knurling and an insulating outer layer. The insulating outer layer is a glass fiber ribbon impregnated with epoxy resin, which can play an insulating role; the metal core shaft can be used under large load conditions, and can withstand both axial loads and shear loads; in addition, the metal core shaft is provided with threads or knurling to increase the friction between the metal core shaft and the insulating outer layer, thereby improving the service life of the insulated shear bolt.
[0022] 2. The present application proposes an insulating connection structure in which an insulating plate is arranged between the connecting parts, so as to ensure that the two connecting parts are electrically isolated while being physically connected; at the same time, the two connecting parts are connected by insulating shear bolts, which can not only ensure the insulation of the connected objects, but also withstand a large load, thereby avoiding the formation of eddy currents between the connecting parts and affecting the use effect of the equipment.
[0023] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.
[0025] Figure 1 A schematic diagram of the structure of an insulating shear bolt provided in an embodiment of the present application.
[0026] Figure 2 A schematic diagram of the structure of a groove on the surface of the middle section of a metal core shaft in an insulating shear bolt provided in an embodiment of the present application.
[0027] Figure 3 A schematic diagram of the structure of a glass fiber ribbon wrapped around a metal core shaft middle section in an insulating shear bolt provided in an embodiment of the present application.
[0028] Figure 4 A schematic structural diagram of an insulating connection structure provided in an embodiment of the present application.
[0029] The diagram is as follows:
[0030] 100. Insulated shear bolt; 200. First connecting member; 300. Insulating plate; 400. Second connecting member; 500. Insulating gasket; 600. Metal gasket; 700. Nut.
[0031] 110. Metal core shaft; 120. Insulating outer layer; 130. Groove; 140. Card slot; 150. Glass fiber ribbon. DETAILED DESCRIPTION
[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.
[0033] like Figure 1 As shown, the embodiment of the present application provides an insulating shear bolt 100, including a metal core shaft 110, an insulating outer layer 120 is sleeved on the middle section of the metal core shaft 110, external threads are provided at both ends of the metal core shaft 110, and a clamping groove 140 is provided between the insulating outer layer 120 and the external threads at both ends. In the embodiment of the present application, the insulating shear bolt 100 adopts the metal core shaft 110, which avoids the problem that the conventional insulating bolts made of materials such as nylon, PEEK, POM, epoxy, and ceramics have limited bearing capacity and cannot be used in working conditions with large loads; at the same time, the insulating shear bolt 100 of the present application is a non-full thread structure, which ensures that the metal core shaft 110 can be used under large load conditions, and can withstand both axial loads and shear direction loads.
[0034] like Figure 2 As shown, in an insulating shear bolt 100 provided in the above embodiment of the present application, a groove 130 is provided on the surface of the middle section of the metal core shaft 110 that is in contact with the insulating outer layer 120. Alternatively, in the present embodiment, the groove 130 provided on the surface of the middle section of the metal core shaft 110 can also be replaced by knurling. Specifically, knurling is a mechanical process of rolling patterns on the surface of the middle section of the metal core shaft 110. The rolling patterns are in contact with the insulating outer layer 120 to improve the anti-slip property of the contact surface between the two, thereby improving the service life of the insulating shear bolt 100.
[0035] like Figure 3 As shown, in an insulating shear bolt 100 provided in the above embodiment of the present application, the insulating outer layer 120 is a glass fiber ribbon 150 impregnated with epoxy resin. Further, the diameter of the glass fiber ribbon 150 is larger than the diameter of the middle section of the metal core shaft 110. In this embodiment, after the metal core shaft 110 wrapped with the insulating glass fiber ribbon 150 is connected to other components, the insulating glass fiber ribbon 150 contacts the other components, so that the insulating shear bolt 100 can be prevented from being electrically connected to other connected components.
[0036] The insulating shear bolt 100 provided in the above embodiment of the present application adopts the following manufacturing method to ensure that the metal core shaft 110 and the insulating outer layer 120 can maintain sufficient connection strength:
[0037] First, a groove 130 is turned on a long metal rod to increase the connection strength between the metal mandrel 110 and the insulating outer layer 120; wherein the turning groove 130 structure in this step can also be replaced by a knurling structure, both of which have the same effect of improving the anti-slip property of the contact surface.
[0038] Secondly, a glass fiber ribbon 150 impregnated with epoxy resin is wound on the metal rod. The wound glass fiber ribbon 150 forms the insulating outer layer 120 in the present application. The thickness of the glass fiber ribbon 150 is greater than the middle diameter of the final metal core shaft 110 .
[0039] Next, the metal rod wrapped with the glass fiber ribbon 150 and impregnated therewith is placed in a curing furnace for curing. The curing temperature can be set according to the grade of the epoxy resin.
[0040] Finally, the solidified metal rod is integrally turned to form the structure of the insulating shear bolt 100 as described above.
[0041] like Figure 4 As shown, an embodiment of the present application provides an insulating connection structure, including an insulating shear bolt 100, a first connecting member 200, an insulating plate 300 and a second connecting member 400 as described in the previous embodiment, wherein through holes are provided on the first connecting member 200, the insulating plate 300 and the second connecting member 400, and the insulating shear bolt 100 passes through the first connecting member 200, the insulating plate 300 and the second connecting member 400 in sequence through the through holes to connect them, so that an insulating plate 300 is provided between the two connecting members, which can ensure that the two connecting members are electrically isolated while being physically connected; at the same time, the two connecting members are connected by the insulating shear bolt 100, and the insulating glass fiber ribbon 150 is in contact with the through holes of the two connecting members, which can not only ensure that the connected objects are insulated from the insulating shear bolt 100, but also can withstand a large load, and at the same time, no eddy current will be formed between the connecting members. In this embodiment, nuts 700 matching with the external threads are provided at both ends of the insulating shear bolt 100 , and the first connecting member 200 , the insulating plate 300 and the second connecting member 400 can be fastened together by rotating the nuts 700 .
[0042] In the insulating connection structure provided in the above embodiment of the present application, insulating washers 500 are provided between the nuts 700 at both ends of the insulating shear bolt 100 and the first connector 200 and the second connector 400. In this embodiment, the nut 700 and the first connector 200 and the second connector 400 are also electrically isolated by the insulating washers 500, so that the nut 700 can prevent eddy currents from being formed between the components due to electrical conduction while fastening the first connector 200, the insulating plate 300 and the second connector 400.
[0043] In the insulating connection structure provided in the above embodiment of the present application, a metal gasket 600 is further provided between the insulating gasket 500 and the nut 700, and the metal gasket 600 is provided at the clamping groove 140. The metal gasket 600 can effectively prevent these connections from loosening under dynamic conditions, and can maintain the stability and safety of the connector by increasing friction or providing additional support.
[0044] An embodiment of the present application provides a magnetic coil, such as a TF coil, including the insulating shear bolt 100 as described in the previous embodiment, or the insulating connection structure as described in the previous embodiment. And an embodiment of the present application also provides a nuclear fusion device, such as a tokamak device, including the insulating shear bolt 100 as described above, or the insulating connection structure as described above, or a magnetic coil as described above. In this embodiment, the nuclear fusion device or the TF coil is under the action of the electromagnetic field, and the annular coil fixing device will induce eddy currents, which will affect the operation of the device. In order to avoid the occurrence of eddy currents, the annular coils in the nuclear fusion device can be mutually fixed by insulating shear bolts 100.
[0045] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0046] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0047] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0048] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.
Claims
1. An insulating shear bolt, characterized in that: The invention comprises a metal core shaft, an insulating outer layer is sleeved on the middle section of the metal core shaft, external threads are arranged on both ends of the metal core shaft, and clamping grooves are arranged between the insulating outer layer and the external threads on both ends.
2. The insulating shear bolt according to claim 1, characterized in that: Grooves or knurling are arranged on the surface of the middle section of the metal core shaft which is in contact with the insulating outer layer.
3. The insulating shear bolt according to claim 2, characterized in that: The outer insulating layer is a glass fiber ribbon impregnated with epoxy resin.
4. The insulating shear bolt according to claim 3, characterized in that: The diameter of the glass fiber ribbon is greater than the middle diameter of the metal core shaft.
5. An insulating connection structure, characterized in that: It comprises an insulating shear bolt, a first connecting member, an insulating plate and a second connecting member as described in any one of claims 1 to 4, wherein the first connecting member, the insulating plate and the second connecting member are all provided with through holes, the insulating shear bolt passes through the first connecting member, the insulating plate and the second connecting member in sequence to connect them, and nuts matching the external threads are provided at both ends of the insulating shear bolt.
6. The insulating connection structure according to claim 5, characterized in that: Insulating gaskets are arranged between the nuts at both ends of the insulating shear bolt and the first connecting member and the second connecting member.
7. The insulating connection structure according to claim 6, characterized in that: A metal washer is also arranged between the insulating washer and the nut.
8. The insulating connection structure according to claim 7, characterized in that: The metal gasket is arranged at the slot.
9. A magnetic coil, characterized in that: It comprises the insulating shear bolt as described in any one of claims 1 to 4, or the insulating connection structure as described in any one of claims 5 to 8.
10. A nuclear fusion device, characterized in that: It comprises the insulating shear bolt as described in any one of claims 1 to 4, or the insulating connection structure as described in any one of claims 5 to 8, or a magnetic coil as described in claim 9.