CN2587918Y

CN2587918Y - Expansion screw fastening mechanism with screw fastener for railway concreter sleeper

Info

Publication number: CN2587918Y
Application number: CN 02282130
Authority: CN
Inventors: 沈长耀
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-10-30
Filing date: 2002-10-30
Publication date: 2003-11-26
Anticipated expiration: 2012-10-30

Abstract

The utility model relates to an expansion bolt fastening mechanism with a bolt fastener for railway concrete sleepers. The utility model is composed of an expansion bolt, a plastic sleeve pipe, a nut and a washer, wherein, the nut and the washer can be replaced by a locknut and a position-limit plate. The expansion bolt and a plastic sleeve pipe component are inserted from the top end of a pre-opened hole of a concrete sleeper. The upper top surface of a flange of the plastic sleeve pipe is pressed by a specific tool, and simultaneously the expansion bolt is poked upwards. The surface of a prism on the lower part of the plastic sleeve pipe is expanded into an umbrella shape under the extrusion of a truncated multi-angle cone body on the lower part of the expansion bolt, and thereby, the continuous ascent of the expansion bolt is prevented. A plurality of convex edges are arranged on the lower part of a prism body of the expansion bolt, and the plastic sleeve pipe and the hole wall of the pre-opened hole of the concrete sleeper can be tightly squeezed by the convex edges. The fixed connection of the expansion bolt, the plastic sleeve pipe component and the concrete sleeper is completed. Existing sulphur anchoring can be replaced by the mechanism, and simultaneously the expansion bolt and the plastic sleeve pipe component can be replaced at any time.

Description

The railway concrete sleeper has bolt fastener expansion bolt retention mechanism

Technical field

Railway concrete Expension belt for sleeper fastener retention mechanism is applicable to that elastic bar fastener, shell fragment fastener and rigidity fastener etc. are various the fastening of bolt fastener, belongs to railway track fastener technology field.

Background technology

What at present the railway concrete sleeper had a bolt fastener retention mechanism basic composition is screw spike, nut and packing ring.The screw spike bottom is fixed with sulfur cement mortar anchorage and concrete sleeper.Earlier screw spike is positioned in the preformed hole of concrete sleeper during construction with special support, then with material mix and heat fused such as sulphur, cement, (sleeper inversion) pours into from concrete sleeper preformed hole bottom with it, and after the slurry condensation fusion, fixed work is finished.This consolidation method technology is numerous and diverse, and the gas that volatilizees during fusing sulphur pollutes the environment, harmful workers ' health.Simultaneously because this fixed nonrepeatability, in case the inaccurate or situations such as thread damage, corrosion and sulfur cement mortar anchorage inefficacy of screw spike in use in screw spike location occur, whole sleepers is promptly scrapped.Anchoring the sleeper of screw spike also increased the difficulty of transportation.For this reason, the cancellation sulfur cement mortar anchorage, seek new retention mechanism is the problem that railway department extremely pays close attention to always.

Summary of the invention

The utility model provides a kind of simple in structure, easy for installation and removable concrete sleeper that bolt fastener retention mechanism is arranged.This mechanism's (see figure 1) is made up of expansion bolt 1, plastic bushing 2, nut 3 and plain washer 4, and wherein nut and plain washer are interchangeable with locknut and limiting plate.This mechanism realizes the fixed of bolt bottom and concrete sleeper with expansion bolt and plastic bushing, thereby has cancelled sulfur cement mortar anchorage.

The expansion bolt (see figure 3) constitutes by three sections: a section is the body of bolt; The b section is a prism; (the rib number is 4～6) has several fins in the prism bottom, uses for the jam-packed plastic bushing; The c section is truncate multiple-angle pyramid (the angle number is 4～6).

The plastic bushing (see figure 4) constitutes by three sections: the d section is the top flange, and the center is a circular hole, is provided with several recesses at periphery, uses when supplying to lever up plastic bushing; The e section is hollow polygon prism (the rib number is identical with bolt); The f section is the hollow polygon prism (the rib number is identical with the e section) of corner angle trough of belt mouth.In e section and f section junction, prismatic lateral surface is provided with groove, is convenient to the bottom prismatic surface and outwards expand into umbrella shape.

Corresponding concrete sleeper preformed hole (seeing Figure 13) constitutes by four sections: 1 section is top groove, and planar graph is consistent with plastic bushing top flange, but size is bigger; 2 sections is many ribs hole post, and the rib number is consistent with plastic bushing; 3 sections is truncate multiple-angle pyramid, and the angle number is consistent with the truncate multiple-angle pyramid of expansion bolt c section; 4 sections is many ribs hole post, extends to the sleeper bottom surface.

Description of drawings

Fig. 1 installs main looking and main cross-sectional schematic for the utility model structure.

Fig. 2 is the schematic top plan view of Fig. 1.

Fig. 3 looks schematic diagram for the expansion bolt master.

Fig. 4 is the schematic top view of Fig. 3.

Fig. 5 is the A-A sectional schematic diagram of Fig. 3.

Fig. 6 is the B-B sectional schematic diagram of Fig. 3.

Fig. 7 is the C-C sectional schematic diagram of Fig. 3.

Fig. 8 looks schematic diagram for the end of Fig. 3.

Fig. 9 looks schematic diagram for the plastic bushing master.

Figure 10 is the schematic top view of Fig. 9.

Figure 11 is the D-D sectional schematic diagram of Fig. 9.

Figure 12 looks schematic diagram for the end of Fig. 9.

Figure 13 is the cross-sectional schematic of concrete sleeper preformed hole.

Figure 14-a is the cross-sectional schematic that expansion bolt assembly inserts the concrete crosstie preformed hole.

Figure 14-b is the cross-sectional schematic of expansion bolt assembly and concrete sleeper concretion state.

Specific embodiments

Shown in Fig. 1, Figure 14-a, Figure 14-b, implementation step is as follows:

1, expansion bolt 1 is penetrated from plastic bushing 2 lower ends, the c section of expansion bolt 1 is stayed outside the lower end of plastic bushing 2, and the two forms assembly.

2, assembly is inserted from sleeper preformed hole upper end, and the flange of plastic bushing 2 is embedded in the sleeper top groove.

3, with special tool on the flange that compresses plastic bushing 2 in the end face, to dial on the expansion bolt 1, under the extruding of the truncate multiple-angle pyramid of the c of expansion bolt 1 section, the f section prismatic surface of plastic bushing 2 is inflated into umbrella shape, thereby has stoped the continuation of expansion bolt 1 to be risen.This moment under the extruding of the b of bolt 1 section prism lower lug, this place plastic bushing 2 with sleeper preformed hole hole wall jam-packed, so prevent the whereabouts of expansion bolt 2 after unloading special tool.So far, fixed the finishing between expansion bolt assembly and the concrete sleeper.

4, after various fastener spare and accessory parts are installed, load onto packing ring 4 and can be screwed into nut 3.Because concrete sleeper preformed hole, plastic bushing 2 and expansion bolt 1 are multiedge cylinder, therefore, when tightening or unscrew nut 3, bolt 1 has enough anti-rotation abilities.

5, in the time of need unloading expansion bolt assembly, unscrew nut 3 earlier, pull down various accessories, hammering bolt top, make the truncate multiple-angle pyramid of the c section of expansion bolt 1 break away from plastic bushing 2, lever up plastic bushing 2 from the recess of plastic bushing flange, assembly can be extracted with instrument.

Claims

1, a kind of railway concrete sleeper has bolt fastener expansion bolt retention mechanism, form by expansion bolt, plastic bushing, nut or locknut and plain washer or limiting plate, it is characterized in that: the top of expansion bolt is the body of bolt, and the middle part is a prism, and the bottom is truncate multiple-angle pyramid.

2, railway concrete sleeper according to claim 1 has bolt fastener expansion bolt retention mechanism, it is characterized in that: the top of plastic bushing is flange, and the middle part is hollow multiedge cylinder, and the bottom is the hollow multiedge cylinder of corner angle trough of belt mouth.

3, railway concrete sleeper according to claim 1 has bolt fastener expansion bolt retention mechanism, it is characterized in that: with the preformed hole of the corresponding concrete sleeper of expansion bolt retention mechanism, by 1 section for top groove, 2 sections constitute for the polygon prism hole for truncate multiple-angle pyramid and 4 sections for many ribs hole post, 3 sections, each section rib number or angle number are identical with the angle number with the rib number of expansion bolt and plastic bushing.