Low magnetic resistance steel bar net rack structure suitable for super high speed low vacuum magnetic levitation pipeline

Abstract

The application provides a low magnetic resistance steel bar net rack structure suitable for a super-high-speed low-vacuum magnetic suspension pipeline, wherein the net rack structure comprises an insulating net rack assembly, a plurality of transverse steel bars and a plurality of longitudinal steel bars; the insulating net rack assembly is made by machining and is made of non-metallic material; the material is selected as a bar; the insulating net rack assembly is composed of a plurality of bar-shaped pieces; a plurality of transverse mounting holes and a plurality of longitudinal mounting holes are formed on any bar-shaped piece; the transverse mounting holes are formed by a milling machine; the two ends of the transverse steel bar are respectively arranged in the transverse mounting holes of two bar-shaped pieces arranged at intervals in the transverse direction; and the two ends of the longitudinal steel bar are respectively arranged in two longitudinal mounting holes arranged at intervals in the longitudinal direction. The application can eliminate the magnetic resistance from the root cause, has higher stability of the insulating lap joint and low cost.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of bridge design, and particularly relates to a low-magnetic-resistance steel bar net rack structure suitable for a super-high-speed low-vacuum maglev pipeline. BACKGROUND

[0002] Currently, the low-magnetic-resistance design scheme is mainly used in many core high-precision industries such as rail transit systems, maglev transportation systems, aerospace fields, and is also applied to some high-tech research and development industries, such as super-high-speed low-vacuum pipeline maglev transportation systems. At present, one of the core technologies restricting the rapid advancement of high-speed vehicles is the problem of excessive magnetic resistance. Excessive magnetic resistance directly increases the load of the train during operation, thereby reducing the efficiency of the train during operation, and the speed cannot be increased. The direct cause of excessive magnetic resistance is that the steel bar net rack in the magnetic field environment generates eddy current, thereby converting most of the magnetic field energy into heat energy of the steel bar net rack. Related research and engineering practice show that the current traditional scheme for weakening magnetic resistance is the same, which adopts the method of replacing low-magnetic-resistance steel bar materials, but this method has high cost, slow construction progress, and affects the strength and precision of the concrete beam, and has low cost performance. For example, the patent "Superconducting maglev track structure capable of reducing magnetic resistance" (CN115162071B) discloses a superconducting maglev track structure capable of reducing magnetic resistance. The base, the running beam and the guide rail are all non-magnetic or low-magnetic materials, which can isolate magnetic resistance and thereby reduce energy consumption. However, the track beam in the device scheme is made of non-magnetic and low-magnetic materials, which results in insufficient overall strength and deformation amount, and is prone to vibration before the train is collected. The cost of this scheme is also very high.

[0003] Therefore, based on the technical problems existing in the prior art, it is urgent to provide a steel bar arrangement scheme for reducing the magnetic resistance generated by the pipeline steel bar during the running of a high-speed maglev train. SUMMARY

[0004] The purpose of the present application is to at least solve one of the problems existing in the prior art.

[0005] To this end, the present application provides a low-magnetic-resistance steel bar net rack structure suitable for a super-high-speed low-vacuum maglev pipeline.

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

[0007] According to one aspect, a low magnetic resistance steel grid structure suitable for ultra-high-speed low-vacuum maglev pipelines is provided, wherein the grid structure includes an insulating grid assembly, a plurality of transverse steel bars and a plurality of longitudinal steel bars, the insulating grid assembly is manufactured by machining, the material selected is non-metallic material, and the material selected for cutting is bar stock, the insulating grid assembly is composed of a plurality of rod-shaped members, and any of the rod-shaped members is machined with a plurality of transverse mounting holes and a plurality of longitudinal mounting holes, wherein the hole features are completed on a milling machine, and the two ends of the transverse steel bars are respectively installed in the transverse mounting holes of two rod-shaped members arranged at a transverse interval, and the two ends of the longitudinal steel bars are respectively installed in the two longitudinal mounting holes arranged at a longitudinal interval.

[0008] Furthermore, the insulating grid assembly includes multiple groups of rod-shaped member assemblies, which are arranged at intervals along the transverse direction. Any rod-shaped member assembly includes multiple rod-shaped members, which are arranged at intervals along the longitudinal direction. For any group of rod-shaped member assemblies, multiple longitudinal steel bars are arranged between adjacent rod-shaped members, and for any two adjacent groups of rod-shaped member assemblies, multiple transverse steel bars are arranged between adjacent rod-shaped members.

[0009] Furthermore, the non-metallic material is nylon, glass fiber cloth layer or FR4.

[0010] Furthermore, the transverse steel bars and longitudinal steel bars are both HRB400 threaded steel bars.

[0011] According to another aspect, a concrete pouring unit is provided, which includes the low magnetic resistance steel grid structure described above.

[0012] Furthermore, the concrete pouring unit is obtained by the following method:

[0013] The formwork is supported on the periphery of the steel grid, and then concrete is poured to obtain a concrete pouring unit.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) The present invention designs an insulating grid assembly. Instead of using traditional binding between steel bars, an insulating grid assembly made of non-metallic materials is used. This prevents any steel bars from contacting each other, making it impossible to form a closed circuit and eliminating magnetic resistance from the root.

[0016] (2) The raw materials used in the insulating grid assembly of the present invention can be the cheapest glued materials, such as glued rods, which are almost close to zero magnetic resistance, simple to process, stable in performance, and easy to obtain, which can greatly save the time and labor costs of making the insulating grid assembly;

[0017] (3) The steel bar mounting mode of the insulating net rack assembly is more stable than the traditional binding of steel bars by binding belts and binding wires, and the stability is that the steel bar net rack is less likely to deform, thereby improving the overall strength and dimensional shape accuracy of the cast concrete unit, and ultimately making the data of the running test more accurate and real;

[0018] (4) Compared with the traditional binding of steel bars by binding belts and binding wires, the insulating net rack assembly method saves more labor cost and time cost. According to practical test, for the same work with the same strength, the working hours required by binding wires is 86, the working hours required by binding belts is 70, and the working hours required by the insulating net rack assembly method is 16. Therefore, the steel bar fixing method of the steel bar net rack assembly saves several times of working hours compared with the traditional binding method.

[0019] (5) The most common HRB400 threaded steel bar is used in the present application, and the raw material is widely available and sold in the market, which can greatly save the cost of steel bars. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present application and constitute a part of the specification, illustrate the embodiments of the present application and serve to explain the principles of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0021] Fig. 1 is a schematic diagram of the insulating net rack assembly of the present application;

[0022] Fig. 2 is a schematic diagram of the steel bar net rack of the present application;

[0023] Fig. 3 is a schematic diagram of the concrete pouring unit of the present application. DETAILED DESCRIPTION

[0024] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The technical solutions of the embodiments of the present application will be described clearly and completely in the following with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, but not all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0025] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0026] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0027] like Figs. 1-3 As shown, in one embodiment of the present invention, according to one aspect, a low magnetic resistance steel grid structure suitable for ultra-high-speed low-vacuum maglev pipelines is provided, wherein the grid structure includes an insulating grid assembly 101, a plurality of transverse steel bars 102 and a plurality of longitudinal steel bars 103, and the insulating grid assembly 101 is manufactured by machining, and the material selected is non-metallic material, and the material selected for cutting is bar stock. The insulating grid assembly 101 is composed of a plurality of rod-shaped members, and any of the rod-shaped members is processed with a plurality of transverse mounting holes and a plurality of longitudinal mounting holes, wherein the hole features are completed on a milling machine, and the two ends of the transverse steel bar 102 are respectively installed in the transverse mounting holes of the two rod-shaped members arranged at a transverse interval, and the two ends of the longitudinal steel bar 103 are respectively installed in the two longitudinal mounting holes arranged at a longitudinal interval.

[0028] Specifically, if Fig. 2 As shown, the insulating grid assembly 101 includes multiple groups of rod-shaped member assemblies, and the multiple groups of rod-shaped member assemblies are arranged at intervals along the transverse direction. Any rod-shaped member assembly includes multiple rod-shaped members, and the multiple rod-shaped members are arranged at intervals along the longitudinal direction. For any group of rod-shaped member assemblies, multiple longitudinal steel bars 103 are arranged between adjacent rod-shaped members, and for any two adjacent groups of rod-shaped member assemblies, multiple transverse steel bars 102 are arranged between adjacent rod-shaped members.

[0029] That is, the embodiment of the application first completes the machining of the insulating net rack assembly 101 components, which can use non-metallic materials such as nylon, glass cloth, FR4, etc. with high strength and stable performance, or even the cheapest glue material as raw material. The blanking material is a bar, and the hole features are completed on the milling machine. Then, the insulating net rack assembly 101, the horizontal steel bar 102 and the vertical steel bar 103 are used to complete the production of the steel bar net rack. The production process is relatively simple, and the workers only need to insert the purchased horizontal steel bar 102 and vertical steel bar 103 into the hole features of the insulating net rack assembly 101 to realize the production of the steel bar net rack. The steel bars and the steel bar supports of the produced steel bar net rack are not in contact, so there is no closed loop as a whole. Even under the condition of a strong magnetic field, high-level magnetic resistance will not be generated, thereby reducing the energy consumption under the train sliding working condition.

[0030] In the embodiment of the application, the horizontal steel bar 102 and the vertical steel bar 103 are both HRB400 threaded steel bars.

[0031] That is, in the application, all kinds of raw materials and profiles used are shelf products on the market, which can be directly purchased. The implementation of the scheme has the advantages of simple operation, high reliability, high fault tolerance and low requirement for the technical level of workers. It fundamentally solves the problem of high magnetic resistance and greatly saves the cost of raw materials and labor cost. Compared with the traditional magnetic resistance reduction scheme, the construction period is shortened.

[0032] It can be seen that the embodiment of the present application has at least the following advantages compared with the prior art: (1) the present application designs an insulation net rack assembly, and the traditional binding is not used between the steel bars, but the insulation net rack assembly of non-metallic material is used, so that the steel bars are not in contact with each other, thereby making it impossible to generate a closed loop, and eliminating the magnetic resistance from the root; (2) the raw material used in the insulation net rack assembly of the present application can use the cheapest adhesive material, such as adhesive rods, which is almost close to zero magnetic resistance, and the processing is simple, stable and easy to obtain, which can greatly save the time cost and labor cost of manufacturing the insulation net rack assembly; (3) compared with the traditional binding of the steel bars by the binding tape and the binding wire, the stability of the steel bar installation method of the insulation net rack assembly is higher, and the stability is that the steel net rack is less likely to be deformed, thereby improving the overall strength and dimensional shape accuracy of the cast concrete unit, and finally making the data of the running test more accurate and real; (4) compared with the traditional binding of the steel bars by the binding tape and the binding wire, the insulation net rack assembly method for installing the steel bars saves more labor cost and time cost, and according to practical test, for the same work with the same strength, the working hours required by the binding wire is 86 working hours, the working hours required by the binding tape is 70 working hours, and the working hours required by the insulation net rack assembly method is 16 working hours, so according to the above data, the steel bar fixing method of the steel net rack assembly saves several times of working hours of the traditional binding method; (5) the present application uses the most common HRB400 threaded steel bar, and the raw material source is extensive and sold on the market, which can greatly save the cost of steel bars.

[0033] According to another embodiment, a concrete casting unit 20 is provided, which comprises the low magnetic resistance steel net rack structure described above.

[0034] The concrete casting unit 20 is obtained by supporting the formwork 10 around the steel net rack and then casting concrete.

[0035] The steel net rack obtained by the insulation net rack assembly of the present application is stable, so the dimensional accuracy, strength and the like of the outer surface of the concrete wrapped by the net rack are better than those of the net rack wrapped by the steel net rack obtained by the traditional binding of the binding tape and the binding wire, thereby making the test parameters of the train running test before the wheel is collected and during the whole test process more real and effective, and promoting the smooth progress of scientific research work.

[0036] In the description of the application, it should be understood that the orientation words such as "front, back, upper, lower, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship are generally based on the orientation or position relationship shown in the drawings, only for the convenience of describing the application and simplifying the description, without making the opposite statement, these orientation words do not indicate and imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the scope of protection of the application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.

[0037] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0038] In addition, it should be noted that the use of "first", "second" and the like to define parts only facilitates the differentiation of corresponding parts, and the above words have no special meaning unless otherwise stated, therefore, it cannot be understood as a limitation on the scope of protection of the application.

[0039] The above only describes the preferred embodiments of the application and is not intended to limit the application. For those skilled in the art, the application can have various modifications and changes. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A low magnetic resistance steel grid structure suitable for ultra-high-speed low-vacuum maglev pipelines, characterized in that: The grid structure includes an insulating grid assembly, multiple transverse steel bars and multiple longitudinal steel bars. The insulating grid assembly is made by machining, and the material selected is non-metallic material, and the material selected for cutting is bar stock. The insulating grid assembly includes multiple groups of rod-shaped member assemblies, and the multiple groups of rod-shaped member assemblies are arranged at intervals along the transverse direction. Any rod-shaped member assembly includes multiple rod-shaped members, and the multiple rod-shaped members are arranged at intervals along the longitudinal direction. For any group of rod-shaped member assemblies, multiple longitudinal steel bars are arranged at intervals between adjacent rod-shaped members. For any two adjacent groups of rod-shaped member assemblies, multiple transverse steel bars are arranged at intervals between adjacent rod-shaped members. Any of the rod-shaped members is processed with multiple transverse mounting holes and multiple longitudinal mounting holes, wherein the hole features are completed on a milling machine, and the two ends of the transverse steel bar are respectively installed in the transverse mounting holes of the two rod-shaped members arranged at intervals in the transverse direction, and the two ends of the longitudinal steel bar are respectively installed in the two longitudinal mounting holes arranged at intervals in the longitudinal direction.

2. A low magnetic resistance steel grid structure suitable for ultra-high-speed low-vacuum maglev pipeline according to claim 1, characterized in that: The non-metallic material is nylon, glass fiber cloth layer or FR4.

3. The low magnetic resistance steel grid structure suitable for ultra-high-speed low-vacuum maglev pipeline according to claim 1, wherein: The transverse and longitudinal reinforcements are both HRB400 threaded steel bars.

4. A concrete pouring unit, characterized in that: The invention comprises the low magnetic resistance steel grid structure according to any one of claims 1 to 3.

5. A concrete pouring unit according to claim 4, characterized in that: The concrete pouring unit is obtained by the following method: The formwork is supported on the periphery of the steel grid, and then concrete is poured to obtain a concrete pouring unit.

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