Medium-low speed anti-loose magnetic suspension fastener system and installation method thereof

Abstract

The invention discloses a medium-low speed anti-loosening magnetic levitation fastener system and an installation method thereof.The fastener system comprises an anchor bolt, a positioning nut and an iron base plate which are pre-buried in a concrete sleeper, and a height adjusting base plate, H-shaped steel, a distance adjusting buckle plate, a square gasket, a wedge-shaped anti-loosening gasket and a fastening nut are sequentially arranged above the iron base plate; the wedge-shaped lock washer is formed by combining two same washers. Compared with the prior art, the anti-loose structure of the wedge-shaped anti-loose washer is utilized, the performance and the structural design of all parts of the fastener system are integrated, the anti-loose function of the fastener system is achieved, it is guaranteed that the fastener system resists the nut loosening influence caused by vibration under the complex condition of service, and the service life of the fastener system is prolonged. And the effectiveness and the stability of the fastener system are ensured.

Description

Technical Field

[0001] The present invention relates to a medium and low speed anti-loosening maglev fastener system and an installation method thereof. Background Art

[0002] With the development of urban rail transit in China, the construction of maglev rail transit has been gradually carried out. Compared with traditional urban rail transit, maglev rail transit has the advantages of high speed and comfortable riding experience. Maglev fasteners have produced fastener systems with different functional characteristics to adapt to different maglev track lines.

[0003] The patent application with the authorization announcement number CN211734876U discloses an adjustable split medium and low speed maglev fastener system. The fastener system includes an anchoring structure and a fastening structure. One end of the anchoring structure is used for anchoring connection with the crosstie, and an upper iron plate is fixed at the other end of the anchoring structure. The fastening structure is used to connect the sleeper and the upper iron plate. The upper iron plate is provided with a through groove along its length direction, and the anchoring structure is installed in the through groove and can move along the through groove. The fastening structure includes a gauge block installed on the upper iron plate. The gauge block is provided with a convex platform, and the convex platform is used to match the notch on the sleeper. The fastening structure also includes an elastic structure, and a height-adjusting pad is provided in the anchoring structure and / or the fastening structure; the vertical adjustment of the track panel is realized by adjusting the height-adjusting pad; the longitudinal adjustment of the track panel is realized by adjusting the installation position of the anchoring structure on the through groove; the lateral adjustment of the track panel is realized by replacing the gauge block with different convex platform positions.

[0004] The patent application with the authorization announcement number CN211734876U discloses a vibration-damping buckle-type maglev fastener system that is easy to maintain, simplifies the structure of the fastener system and improves the convenience of fastener adjustment, effectively improves the construction efficiency, and reduces the maintenance cost. The fastener system includes T-shaped bolts and buckles arranged on both sides of the web of the H-shaped sleeper. The plate body of the buckle has a front toe and a rear toe extending vertically downward, and a long circular hole of the buckle located between the front toe and the rear toe. The front toe holes, rear toe holes corresponding to the front toe and the rear toe, and the long circular hole of the iron plate corresponding to the long circular hole of the buckle are opened on the iron plate surface. The front toe and the rear toe are correspondingly inserted into the front toe hole and the rear toe hole, and there is a gap between their lower end surfaces and the bottom surface of the iron plate. The lower part of the T-shaped bolt is buried and fixed in the crosstie concrete, and its upper part passes through the long circular hole of the iron plate and the long circular hole of the buckle. The fastening bolt assembly installed at its upper end acts on the plate body of the buckle, and provides a fastening force to the rail bottom of the H-shaped sleeper by the front end of the plate body.

[0005] In medium and low - speed maglev lines, the fastener system mostly uses the bolt + nut method to fix and connect with the track panel. During service, the threaded connection will loosen with the increase of service time and the change of on - site environmental conditions, increasing the workload of daily maintenance and posing a risk of failure to the fastener system. Therefore, based on the existing maglev fasteners, the present invention optimizes the threaded connection structure to prevent the nut from loosening during service and ensure the stability of the fastener system during service. Summary of the Invention

[0006] In order to overcome the above - mentioned disadvantages of the prior art, the present invention provides a medium and low - speed anti - loosening maglev fastener system and its installation method.

[0007] The technical solution adopted by the present invention to solve its technical problems is: a medium and low - speed anti - loosening maglev fastener system, including an anchor bolt embedded in a concrete sleeper, a positioning nut and a base plate. Above the base plate, a height - adjusting plate, an H - shaped steel, a distance - adjusting buckle plate, a square washer, a wedge - shaped anti - loosening washer and a fastening nut are arranged in sequence. The wedge - shaped anti - loosening washer is composed of two identical washers combined.

[0008] The present invention also provides an installation method for the medium and low - speed anti - loosening maglev fastener system, including the following steps:

[0009] Step 1: Screw the positioning nut into a suitable position at the threaded part of the anchor bolt, and then pass the circular through - hole on the base plate through the anchor bolt to complete the combined installation of the anchor bolt, positioning nut and base plate;

[0010] Step 2: Insert the bolt - mounting hole of the height - adjusting plate into the anchor bolt at any angle, and then rotate the height - adjusting plate so that the bolt - quick - installation hole of the height - adjusting plate is inserted into another anchor bolt to complete the installation of the height - adjusting plate;

[0011] Step 3: Align the center of the square hole opened on the H - shaped steel with the anchor bolt and insert it, then place it on the height - adjusting plate;

[0012] Step 4: Insert the distance - adjusting buckle plate of the distance - adjusting buckle plate with the distance - adjusting buckle - plate limiting boss facing down into the anchor bolt and the H - shaped steel, so that the outer wall surface of the distance - adjusting buckle - plate limiting boss cooperates with the square hole opened on the H - shaped steel;

[0013] Step 5: Insert the square washer into the anchor bolt and place it in the square - washer limiting boss of the distance - adjusting buckle plate;

[0014] Step 6: After applying an adhesive to the combined surface of the two washers, align the toothed surfaces of the combined surface to form a finished wedge - shaped anti - loosening washer, then put it on the anchor bolt and place it on the square washer;

[0015] Step 7: Put the fastening nut on the anchor bolt and tighten it to complete the installation of the fastener system.

[0016] Compared with the prior art, the positive effects of the present invention are as follows:

[0017] The present invention utilizes the anti-loosening structure of the wedge-shaped anti-loosening washer, integrates the performance and structural design of each component of the fastener system, realizes the anti-loosening function of the fastener system, and ensures that the fastener system resists the influence of nut loosening caused by vibration under complex conditions during service, guaranteeing the effectiveness and stability of the fastener system. The specific advantages are as follows:

[0018] (1) The fastener system of the present invention has excellent anti-loosening performance

[0019] The present invention realizes the anti-loosening of the nut by using the wedge-shaped anti-loosening washer and the rigid fit between components, and utilizes the self-locking relationship between the tooth profile lead angle and the thread lead angle of the wedge-shaped anti-loosening washer to reduce the risk of fastener system failure during service.

[0020] (2) The fastener system of the present invention has a flexible adjustment amount

[0021] The present invention realizes the height adjustment and lowering of the fastener system by adjusting the type configuration of the height-adjusting spacer and the type configuration of the distance-adjusting buckle plate to meet the requirements of on-site line use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be described by way of examples with reference to the accompanying drawings, wherein:

[0023] Figure 1 is the assembly schematic diagram of the fastener system of the present invention;

[0024] Figure 2 is the exploded view of the fastener system of the present invention;

[0025] Figure 3 is the schematic diagram of the anchor bolt;

[0026] Figure 4 is the schematic diagram of the positioning nut;

[0027] Figure 5 is the schematic diagram of the tie plate, wherein: (1) is the upper surface; (2) is the lower surface;

[0028] Figure 6 is the schematic diagram of the height-adjusting spacer;

[0029] Figure 7 is the schematic diagram of the H-shaped steel;

[0030] Figure 8 is the schematic diagram of the distance-adjusting buckle plate, wherein: (1) is the upper surface; (2) is the lower surface;

[0031] Figure 9 is the schematic diagram of the square washer;

[0032] Figure 10 Schematic diagram of a wedge-shaped lock washer, where: (1) is the combined surface; (2) is the working surface;

[0033] Figure 11 Schematic diagram of the combination of wedge-shaped lock washers;

[0034] Figure 12 Schematic diagram of a fastening nut;

[0035] Figure 13 Schematic diagram of the installation of an anchor bolt, a positioning nut, and a steel backing plate;

[0036] Figure 14 Schematic diagram of the installation process of a height-adjusting spacer;

[0037] Figure 15 Schematic diagram of the completed installation of a height-adjusting spacer;

[0038] Figure 16 Schematic diagram of the installation of an H-shaped steel;

[0039] Figure 17 Schematic diagram of the installation of a distance-adjusting buckle plate;

[0040] Figure 18 Schematic diagram of the installation of a square washer;

[0041] Figure 19 Schematic diagram of the installation of a wedge-shaped lock washer;

[0042] Figure 20 Schematic diagram of the installation of a fastening nut. Specific implementation method

[0043] A medium and low-speed anti-loosening maglev fastener system, as shown in Figure 1 and Figure 2 includes: a concrete sleeper 1, an anchor bolt 2, a positioning nut 3, a steel backing plate 4, a height-adjusting spacer 5, an H-shaped steel 6 (i.e., the track), a distance-adjusting buckle plate 7, a square washer 8, a wedge-shaped lock washer 9, a fastening nut 10, etc., where:

[0044] The structure of the anchor bolt 2 is as shown in Figure 3 and includes a bolt head 2.1 and a thread 2.2. The bolt head can be designed with a square head, a round head, or other shapes. The square head design helps to improve the anti-pulling force of the anchor bolt in the concrete sleeper, and the thread 2.2 is used to fasten the fastener system and the H-shaped steel.

[0045] The structure of the positioning nut 3 is as shown in Figure 4 and the positioning nut 3 is used in cooperation with the anchor bolt 2 and is installed under the steel backing plate 4 for positioning the steel backing plate.

[0046] The structure of the steel backing plate 4 is as shown in Figure 5As shown in the figure, it includes two circular through holes 4.1 for bolt installation and three transverse reinforcing ribs 4.2 provided on the lower surface. The iron backing plate 4 is a cast iron part. The iron backing plate is provided with a general feature of a circular through hole for bolt installation, which is used to pass through bolts for installation. The number and shape of the transverse reinforcing ribs can be increased or decreased according to the actual situation. The function of the transverse reinforcing ribs is that when the iron backing plate 4 is embedded in the concrete sleeper, the lateral force resistance ability of the iron backing plate is enhanced. After the sleeper casting is completed, the iron backing plate 4 needs to be embedded in the sleeper by 1 mm to 2 mm.

[0047] The structure of the shim plate 5 is as Figure 6 shown, including a bolt installation hole 5.1 and a bolt quick installation hole 5.2. The shim plate 5 is used for adjusting the height of the H-beam. When the fastener system is normally installed, a shim plate with a certain thickness is installed. When height adjustment and lowering operations are required, the thickness and quantity of the shim plate are adjusted and reconfigured.

[0048] The structure of the H-beam 6 is as Figure 7 shown. The H-beam is selected according to the maglev track structure. When installing the fasteners, square holes matching the distance adjusting buckle are machined at the corresponding positions of the H-beam, so that the fastener system can be normally installed.

[0049] The structure of the distance adjusting buckle 7 is as Figure 8 shown, including: a bolt installation oblong through hole 6.1, a square washer limiting boss 6.2 and a distance adjusting buckle limiting boss 6.3; the distance adjusting buckle 7 is used for the lateral and longitudinal adjustment of the track panel. During installation, the outer wall surface of the distance adjusting buckle limiting boss 6.3 cooperates with the square hole of the H-beam, and the square washer limiting boss 6.2 is used for the installation of the square washer 8. When lateral and longitudinal adjustments are required, they can be achieved by rotating the direction of the distance adjusting buckle and replacing different models of distance adjusting buckles.

[0050] The structure of the square washer 8 is as Figure 9 shown. The square washer 8 is installed between the distance adjusting buckle 7 and the wedge-shaped lock washer 9.

[0051] The wedge-shaped lock washer 9 relies on the wedge-shaped teeth with a certain angle on the surface to achieve the anti-loosening function. Each wedge-shaped lock washer is composed of two identical washers combined. The tooth shape features of the upper and lower surfaces of the washer are as Figure 10 shown, which are the combined surface tooth shape 7.1 and the working surface tooth shape 7.2 respectively. When combining the wedge-shaped lock washers, align the combined surface tooth shape 7.1 features of the two washers for installation, and apply an adhesive between the washers. As Figure 11 shown.

[0052] The structure of the fastening nut 10 is as Figure 12 shown. The fastening nut 10 is used in cooperation with the anchor bolt 2 for the fastening and fixing of the entire fastener system.

[0053] Installation instructions:

[0054] (1) During installation, first assemble and install the anchor bolt 2, positioning nut 3, and iron backing plate 4.

[0055] First, screw the positioning thin nut 3 into the appropriate position on the thread of the anchor bolt 2, and then pass the circular through-hole 4.1 on the iron backing plate through the anchor bolt. After installation, as Figure 13 shown.

[0056] (2) Install the shim plate 5. Insert the bolt installation hole 5.1 feature of the shim plate into the anchor bolt at any angle, and then rotate the shim plate so that the bolt quick installation hole 5.2 feature is inserted into another anchor bolt. As Figure 14 shown. After installation, as Figure 15 shown.

[0057] (3) Install the H-beam 6. After drilling holes in the H-beam, align the center of the hole on the H-beam with the anchor bolt, and press the H-beam onto the fastener system. As Figure 16 shown.

[0058] (4) Install the distance-adjusting buckle 7. Insert the distance-adjusting buckle as Figure 17 shown into the anchor bolt and the H-beam. Pay attention to the direction of the oblong hole of the distance-adjusting buckle during installation.

[0059] (5) Install the square washer 8. Insert the square washer into the anchor bolt, and the square washer should be recessed into the square washer limiting boss 6.2 of the distance-adjusting buckle. As Figure 18 shown.

[0060] (6) Install the wedge-shaped lock washer 9. Slip the finished wedge-shaped lock washer onto the anchor bolt. As Figure 19 shown.

[0061] (7) Install the fastening nut 10. Slip the fastening nut as Figure 20 shown onto the anchor bolt and tighten it to complete the installation of the fastener system.

Claims

1. A medium and low speed anti-loosening magnetic fastener system, characterized in that: It includes anchor bolts, positioning nuts and iron pads embedded in the concrete sleepers, and height adjustment pads, H-shaped steel, distance adjustment buckle plates, square washers, wedge-shaped anti-loosening washers and fastening nuts are arranged in sequence above the iron pads. The wedge-shaped anti-loosening washers are composed of two identical washers.

2. A medium and low speed anti-loosening magnetic fastener system according to claim 1, characterized in that: The lower surface of the iron pad is provided with reinforcing ribs.

3. A medium and low speed anti-loosening magnetic fastener system according to claim 1, characterized in that: The height-adjusting pad is provided with bolt installation holes and bolt quick installation holes.

4. A medium and low speed anti-loosening magnetic fastener system according to claim 1, characterized in that: An oblong through hole for installing an anchor bolt is arranged in the center of the distance adjusting buckle plate, a square washer limiting boss is arranged on the upper surface of the distance adjusting buckle plate, and a distance adjusting buckle plate limiting boss is arranged on the lower surface of the distance adjusting buckle plate, and the outer wall surface of the distance adjusting buckle plate limiting boss cooperates with the square hole opened on the H-shaped steel.

5. A medium and low speed anti-loosening magnetic fastener system according to claim 1, characterized in that: The upper and lower surfaces of the two washers are respectively a combined surface tooth shape and a working surface tooth shape. The combined surface tooth shapes of the two washers are aligned and installed to form a wedge-shaped anti-loosening washer.

6. A medium and low speed anti-loosening magnetic fastener system according to claim 5, characterized in that: Adhesive is applied to the combined surfaces of the two washers.

7. A medium and low speed anti-loosening magnetic fastener system according to claim 1, characterized in that: The bolts of the anchor bolts have square bolt heads.

8. A medium and low speed anti-loosening magnetic fastener system according to claim 1, characterized in that: The embedding depth of the iron pad in the concrete sleeper is 1mm to 2mm.

9. A method for installing a medium and low speed anti-loosening magnetic fastener system, characterized in that: The steps include: Step 1: Screw the positioning nut into the appropriate position of the anchor bolt thread, and then pass the circular through hole on the iron plate through the anchor bolt to complete the combined installation of the anchor bolt, positioning nut and iron plate; Step 2: Insert the bolt installation hole of the height-adjusting pad into the anchor bolt at any angle, and then rotate the height-adjusting pad so that the bolt quick installation hole of the height-adjusting pad is inserted into another anchor bolt to complete the installation of the height-adjusting pad; Step 3: Align the center of the square hole on the H-shaped steel with the anchor bolt and insert it, then place it on the height adjustment pad; Step 4: Insert the adjustable gusset plate limit boss of the adjustable gusset plate downward into the anchor bolt and the H-shaped steel, so that the outer wall surface of the adjustable gusset plate limit boss and the square hole opened on the H-shaped steel cooperate with each other; Step 5: Insert the square washer into the anchor bolt and place it in the square washer limiting boss of the adjustable spacer plate; Step 6: Insert the finished wedge-shaped anti-loosening washer into the anchor bolt; Step 7. Insert the fastening nut into the anchor bolt and tighten it to complete the installation of the fastener system.

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