Rail-holding type magnetic suspension fastener

Abstract

The utility model provides a rail holding type magnetic suspension fastener which comprises an iron base plate arranged between an H-shaped sleeper and a rail bearing table, square groove holes are formed in bottom plates on the two sides of the H-shaped sleeper, distance adjusting gaskets are arranged in the square groove holes, and the distance adjusting gaskets are connected with the iron base plate. The distance adjusting gaskets comprise the transverse distance adjusting gasket used for adjusting the transverse position of the H-shaped sleeper and the longitudinal distance adjusting gasket used for adjusting the longitudinal position of the H-shaped sleeper, bolt connecting holes are formed in the iron base plate, and the H-shaped sleeper is connected with the iron base plate by screwing anchor bolts into the square groove holes and the bolt connecting holes. The iron base plate is connected with the rail bearing table by screwing anchor bolts into the bolt connecting holes. According to the fastener, adjustment of the horizontal position of the H-shaped sleeper can be achieved only through the distance adjusting gaskets of two specifications (different in width and same in thickness), assembly of buffering distance adjusting blocks of various specifications is not needed, accurate adjustment and stable connection of a track can be achieved, meanwhile, use of an extra track panel tool is avoided, and the installation process is simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic levitation tracks, in particular to a track-holding type magnetic levitation fastener. Background Art

[0002] The medium- and low-speed maglev transportation with a track-holding type belongs to the medium- and low-capacity transportation system. The maglev train and the track are in non-contact operation. The train hugs the F-type track to "fly at zero altitude" without wheel-rail contact friction. It is green and environmentally friendly, highly safe (track-holding operation), has strong climbing ability, and a small turning radius. It is one of the important directions for the development of green urban rail transportation in the 21st century. The medium- and low-speed maglev track with a track-holding type transmits the interaction force between the maglev train and the structure below the line, which is the guarantee for the smooth operation of the maglev train and the comfortable ride of passengers. Among them, the fastener system is the key structure connecting the track and the lower roadbed, bridges, and tunnels, and is also the key to the adjustment accuracy of the maglev track.

[0003] In the related art, a medium-low speed magnetic levitation elastic non-separable fastener with patent application number CN201420795622.3 includes an H-type sleeper, an iron pad and a rail support arranged from top to bottom, and the bottom plates on both sides of the H-type sleeper are provided with spacing block mounting holes, and the spacing block mounting holes are provided with lateral spacing blocks, and the iron pad is provided with bolt connection holes, and the H-type sleeper is connected to the iron pad by screwing the anchor bolts into the spacing block mounting holes and the bolt connection holes, and the iron pad is connected to the rail support by screwing the anchor bolts into the bolt connection holes. The fastener uses a buffering spacing block to realize the lateral adjustment of the track structure along the line, and different specifications of buffering spacing blocks correspond to different lateral adjustment distances. If the lateral adjustment capacity of 10mm is realized, 10 different specifications of buffering spacing blocks need to be equipped, which is extremely inconvenient to use on site; and when the H-type sleeper is installed, the fastener cannot support the H-type sleeper and acts as a tooling during construction. It is necessary to assemble additional rail tooling for construction, which reduces the construction efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a track-holding magnetic levitation fastener to address the deficiencies of the prior art.

[0005] The specific technical solutions are as follows:

[0006] A rail-holding magnetic levitation fastener is provided on an iron pad between an H-shaped sleeper and a rail support platform. Square slots are provided on the bottom plates on both sides of the H-shaped sleeper. Adjustable distance pads are provided in the square slots. The adjustable distance pads include a transverse adjustable distance pad for adjusting the transverse position of the H-shaped sleeper and a longitudinal adjustable distance pad for adjusting the longitudinal position of the H-shaped sleeper. Bolt connection holes are provided on the iron pad. The H-shaped sleeper is connected to the iron pad by screwing anchor bolts into the square slots and the bolt connection holes. The iron pad is connected to the rail support platform by screwing anchor bolts into the bolt connection holes.

[0007] Optionally, a plurality of transverse and longitudinal distance adjustment pads are provided, and the position adjustment of the H-type sleeper is achieved by arranging different numbers of transverse and longitudinal distance adjustment pads in the square slots around the anchor bolts.

[0008] Optionally, the anchor bolt is supported on the beam surface by a positioning nut, the anchor bolt is provided with a thread, and the height of the H-type sleeper can be adjusted by adjusting the positioning nut.

[0009] Optionally, the bottom surface of the iron pad is provided with serrations, and the portion of the bottom surface of the iron pad provided with the serrations and the portion of the rail support platform are cast.

[0010] Optionally, anti-loosening pads and cover plates are provided from top to bottom at the connection portion between the anchor bolt and the H-type sleeper.

[0011] Optionally, a buffer pad and a height adjustment pad are arranged in sequence from top to bottom between the bottom of the H-type sleeper and the upper surface of the iron pad.

[0012] Optionally, a tightening nut and a top nut are threadedly connected in sequence on the upper surface of the H-shaped sleeper on the anchor bolt.

[0013] Optionally, a bolt sleeve is provided on the upper end fixing sleeve of the anchor bolt to prevent the anchor bolt from rusting and getting dirty.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] By setting transverse and longitudinal distance adjusting pads, the fastener can independently adjust the transverse and longitudinal positions of the H-type sleeper, and this design provides a high degree of flexibility, so that the track structure can adapt to different line conditions and geometric requirements; the combined use of square slots and bolt connection holes, coupled with the precise design of the distance adjusting pads, makes the positioning of the H-type sleeper more precise; this technical solution simplifies the construction process, and during on-site installation, the position of the H-type sleeper can be adjusted by adjusting the number of distance adjusting pads, without the need for complex mechanical equipment or a large amount of manual adjustment, thereby improving construction efficiency and accuracy and reducing maintenance costs and difficulty; in addition, before the concrete of the track support platform is poured, the fastener can adjust the distance between the H-type sleeper and the beam surface by adjusting the locating nuts on the anchor bolts to meet the design requirements of different track heights, avoiding the use of additional track tooling, simplifying the installation process, and improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the overall structure of a track-holding magnetic levitation fastener provided in an embodiment of the utility model;

[0017] Figure 2A schematic diagram of the top view of the track-holding magnetic levitation fastener provided in an embodiment of the utility model;

[0018] Figure 3 A schematic cross-sectional view of the H-shaped rail sleeper in the rail-holding magnetic fastener provided in an embodiment of the utility model, used to show the square slot;

[0019] Figure 4 The present invention provides a schematic diagram of the cross-sectional structure of the anchor bolts and spacing gaskets in the track-holding magnetic levitation fastener.

[0020] In the figure: 1. H-type sleeper; 10. Square slot; 11. Anti-loosening pad; 12. Cover plate; 13. Buffer pad; 14. Height-adjusting pad; 2. Iron pad; 21. Serration; 3. Rail support; 4. Adjusting pad; 41. Horizontal adjusting pad; 42. Longitudinal adjusting pad; 5. Anchor bolt; 51. Positioning nut; 52. Top nut; 53. Tightening nut; 54. Bolt sleeve; 55. Anti-loosening pad; 6. Beam surface. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0024] The utility model provides a track-holding magnetic levitation fastener, referring to Figure 1-Figure 4, including an iron pad 2 arranged between an H-type sleeper 1 and a rail support 3. Square slots 10 are provided on the bottom plates on both sides of the H-type sleeper 1, and distance adjustment pads 4 are provided in the square slots 10. The distance adjustment pads 4 include a transverse distance adjustment pad 41 for adjusting the transverse position of the H-type sleeper 1 and a longitudinal distance adjustment pad 42 for adjusting the longitudinal position of the H-type sleeper 1. In addition, bolt connection holes are provided on the height adjustment pad 14, and the H-type sleeper 1 is connected to the height adjustment pad 14 by screwing the anchor bolts 5 into the square slots 10 and the bolt connection holes, and the height adjustment pad 14 is connected to the rail support 3 by screwing the anchor bolts 5 into the bolt connection holes. In this structure, the square slot 10 provides space for adjusting the position of the H-type sleeper 1. By adding or removing the transverse distance adjustment pad 41 and the longitudinal distance adjustment pad 42 in the square slot 10, the position of the H-type sleeper 1 relative to the anchor bolt 5 can be changed to achieve accurate transverse and longitudinal adjustment of the H-type sleeper 1, thereby achieving accurate adjustment of the track, ensuring the smoothness of the track and the smooth operation of the train. The H-type sleeper 1, the iron pad 2 and the rail support 3 form a stable structure through the anchor bolt 5, which improves the overall stability and bearing capacity of the track system. In general, the design of the track-holding magnetic levitation fastener only requires two specifications (different widths and the same thickness) of distance adjustment pads 4 to achieve the horizontal position adjustment of the H-type sleeper 1, and does not require the assembly of multiple buffer distance adjustment blocks of different specifications, so that the track can be accurately adjusted and stably connected. At the same time, the construction process is simplified, the construction efficiency is improved, the maintenance cost and difficulty are reduced, and the adaptability and versatility of the track system are enhanced.

[0025] Reference Figure 1 , the anchor bolt 5 is supported on the beam surface 6 by the positioning nut 51, and the anchor bolt 5 is provided with a thread. During construction, first assemble the fastener and the H-type sleeper 1, prepare the track structure to be installed, use the anchor bolt 5 to support the beam surface 6 through the positioning nut 51, and provide preliminary support for the track structure, and then adjust the positioning nut 51 on the beam surface 6. By adjusting the positioning nut 51 on the anchor bolt 5, the distance adjustment from the H-type sleeper 1 to the beam surface 6 is achieved to achieve the design required track height, and the relative position of the track row and the fastener is fixed. This step does not require additional track row tooling, which simplifies the installation process; then adjust the position of each component to ensure that they reach the designed installation control position. This step usually requires precise measurement and adjustment to ensure the accuracy and consistency of the track; after the track row is fine-tuned, concrete is poured, and the anchor bolt 5 is anchored into the rail support 3 to firmly fix all components together to form a stable track structure. The fastener structure allows fine adjustment of the track structure, and precise adjustment of height and position can be achieved through simple tools such as positioning nuts 51, eliminating the need for additional track tooling, reducing the special equipment and tools required for construction, reducing construction costs, and improving construction efficiency.

[0026] Specifically, a plurality of transverse distance adjustment pads 41 and longitudinal distance adjustment pads 42 are provided, so that the position adjustment of the H-type sleeper 1 is more flexible. In the square slots 10 outside the anchor bolts 5, by providing different numbers of transverse distance adjustment pads 41 and longitudinal distance adjustment pads 42, the H-type sleeper 1 can be precisely adjusted. This design enables the H-type sleeper 1 to be fine-tuned according to actual needs, ensuring the stability of the railway line and the safety of train travel. At the same time, the provision of multiple pads also increases the stability and durability of the sleeper and reduces maintenance costs.

[0027] Reference Figure 1 The bottom surface of the iron pad 2 is provided with serrations 21, and the serrations 21-shaped structure is designed to form a tight and firm fit with the rail bearing platform 3, ensuring that it can provide more reliable fixation and support when bearing the weight of the railway vehicle. The part of the bottom surface of the iron pad 2 with serrations 21 and the part of the rail bearing platform 3 are cast, so that the two can form a continuous and solid bonding surface, which not only enhances the friction between the iron pad 2 and the rail bearing platform 3, but also improves the overall wear resistance and service life, thereby ensuring the stability and safety of the railway transportation system.

[0028] Specifically, refer to Figure 1 The connection part between the anchor bolt 5 and the H-type rail sleeper 1 is provided with an anti-loosening plate 11 and a cover plate 12 from top to bottom, which can improve the anti-loosening performance of the connection part and prevent the bolt from loosening due to long-term use or external environmental factors. The function of the anti-loosening plate 11 is to introduce a certain pressure between the contact surface of the bolt and the rail sleeper to offset the loosening trend of the bolt caused by factors such as vibration, which can effectively prevent the bolt from breaking due to excessive force and ensure the reliability of the connection.

[0029] Reference Figure 1 , a buffer pad 13 and a height adjustment pad 14 are arranged in sequence from top to bottom between the bottom of the H-type sleeper 1 and the upper surface of the iron pad 2. When vertical distance adjustment is required during track operation and maintenance, first loosen the tightening nut 53 and the top nut 52 of the anchor bolt 5, select height adjustment pads 14 with different thickness combinations according to the required height adjustment amount, lift the rail row to a certain height, insert the combined pad, adjust the position of each component, and tighten the bolts according to the designed torque. The buffer pad 13 can effectively reduce the transmission of vehicle vibration to the rail support platform 3, protect the concrete structure of the rail support platform 3 from damage, and the two pads are laid layer by layer between the two, playing a role of connection and balance, ensuring the stable connection between the H-type sleeper 1 and the iron pad 2, while leaving a certain adjustment space for fine-tuning according to actual needs to maintain the stability and comfort of the railway line.

[0030] Specifically, refer to Figure 1The anchor bolt 5 is located on the upper right surface of the H-type sleeper 1 and is threaded with a top nut 52 and a tightening nut 53 in sequence from the upper right to the bottom. The double nut anti-loosening increases the friction and locking force by installing two nuts on the anchor bolt 5, thereby preventing the bolt from loosening. During construction, first tighten the tightening nut 53 onto the anchor bolt 5 until it fits tightly against the component to be fixed; then, install the top nut 52 on the tightening nut 53, which is usually tightened to a certain torque to ensure that there is a certain pressure between it and the tightening nut 53; finally, the top nut 52 will rotate slightly to create a small gap between the two nuts. This gap will be eliminated by a small rotation of the top nut 52 under the action of vibration or other external forces, thereby maintaining the pressure between the two nuts and preventing the tightening nut 53 from loosening. In addition, an anti-loosening gasket 55 is also provided between the tightening nut 53 and the buffer plate 13 to increase the friction of the bolt connection and prevent the bolt from loosening due to vibration or cyclic load. Common anti-loosening washers 55 include: spring washers and safety washers; spring washers are elastic, and when the nut is tightened, they will deform and generate continuous pressure under the bolt head and nut, increasing friction and preventing loosening; safety washers usually have special shapes, such as wave or sawtooth 21 shapes, and when the nut is tightened, they will produce a bite effect under the bolt head and nut, increasing the anti-loosening effect.

[0031] Specifically, refer to Figure 1 The upper fixing sleeve of the anchor bolt 5 is provided with a bolt sleeve 54 to prevent the anchor bolt 5 from rusting and getting dirty. The bolt sleeve 54 protects the bolt from moisture, dust and other pollutants, thereby greatly extending the service life of the bolt and reducing the cost and frequency of railway maintenance. The bolt sleeve 54 is usually made of corrosion-resistant materials, such as stainless steel or special plastics, to ensure that it can still maintain its excellent protective performance in harsh railway environments. In addition, the design of the sleeve also needs to take into account easy installation and disassembly to facilitate the maintenance and replacement of the sleeper.

[0032] In the design of railway lines, considering the different characteristics of straight sections and curved sections, the length of the anchor bolt 5 is designed differently to ensure the stability and adaptability of the track structure. The track structure of the straight section is relatively simple, and the stress conditions on both sides of the track are basically symmetrical. Therefore, in the straight section, anchor bolts 5 of standard length are usually used. The anchor bolts 5 of standard length can provide sufficient anchoring depth to ensure a firm connection between the track and the rail support platform 3, while meeting the general load-bearing and stability requirements of the straight track. The track structure of the curved section needs to consider the centrifugal force when the train turns. In order to balance the centrifugal force of the train, the outer side of the track is usually slightly higher than the inner side, forming an inclined angle to provide centripetal force, so that the train can remain stable when turning and reduce the discomfort of passengers. In order to adapt to the different heights of the rail support platform, anchor bolts of different lengths are required; usually, on the inner side of the curve, due to the centrifugal force when the train turns, the pressure on the inner side of the track is relatively small. In order to adapt to this smaller pressure, short-sized anchor bolts 5 are used. Short-sized anchor bolts 5 can reduce the use of materials and improve economy without affecting the stability of the structure. On the contrary, on the outside of the curve, due to the centrifugal force, the pressure on the outside of the track is relatively large. In order to enhance the bearing capacity and stability of the outside of the track, long anchor bolts 5 are used. Long anchor bolts 5 can provide a deeper anchoring depth, increase the connection strength between the track and the rail support 3, and effectively resist external pressure. By using anchor bolts 5 of different lengths in different sections, the force distribution of the track structure can be optimized, and the adaptability and stability of the entire track system can be improved.

[0033] The above are only preferred embodiments of the present invention, and do not limit the implementation mode and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A rail-holding magnetic fastener, comprising an iron pad arranged between an H-shaped sleeper and a rail support platform, characterized in that: Square slots are provided on the bottom plates on both sides of the H-type sleeper, and distance adjusting pads are provided in the square slots. The distance adjusting pads include transverse distance adjusting pads for adjusting the transverse position of the H-type sleeper and longitudinal distance adjusting pads for adjusting the longitudinal position of the H-type sleeper. Bolt connecting holes are provided on the iron pad. The H-type sleeper is connected to the iron pad by screwing anchor bolts into the square slots and the bolt connecting holes, and the iron pad is connected to the rail support platform by screwing anchor bolts into the bolt connecting holes.

2. The track-holding magnetic fastener according to claim 1, characterized in that: A plurality of transverse and longitudinal distance adjusting pads are provided, and the position adjustment of the H-type sleeper is achieved by arranging different numbers of transverse and longitudinal distance adjusting pads in the square slots around the anchor bolts.

3. The track-holding magnetic fastener according to claim 1, characterized in that: The anchor bolt is supported on the beam surface by a positioning nut, and a thread is arranged on the anchor bolt. The height of the H-type sleeper can be adjusted by adjusting the positioning nut.

4. The rail-holding magnetic fastener according to claim 1, characterized in that: The bottom surface of the iron pad is provided with serrations, and the portion of the bottom surface of the iron pad provided with the serrations and the portion of the rail bearing platform are cast and arranged.

5. The track-holding magnetic fastener according to claim 1, characterized in that: The connection portion between the anchor bolt and the H-shaped sleeper is provided with an anti-loosening pad and a cover plate from top to bottom.

6. The track-holding magnetic fastener according to claim 1, characterized in that: A buffer pad and a height adjustment pad are arranged in sequence from top to bottom between the bottom of the H-shaped sleeper and the upper surface of the iron pad.

7. The track-holding magnetic fastener according to claim 1, characterized in that: The anchor bolt is located on the upper surface of the H-shaped sleeper and is threadedly connected with a tightening nut and a top nut in sequence.

8. The track-holding magnetic fastener according to claim 1, characterized in that: The fixing sleeve at the upper end of the anchor bolt is provided with a bolt sleeve to prevent the anchor bolt from rusting and getting dirty.

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