A tramway switch structure

Abstract

The present invention provides a switch structure for a tramway, which is mainly composed of a manganese steel base and a straight base rail and a curved tip rail fixed inside the manganese steel base, wherein the manganese steel base includes a first connecting section located at the head, a second connecting section located at the tail, and a base section located between the first connecting section and the second connecting section. The base is integrally cast using high manganese steel, which has a short process production cycle, a small processing amount, and a great advantage in production cost. Since the base is integrally cast, after assembling the straight base rail and the curved tip rail, the overall structural stability is very good and the assembly accuracy is also higher. The straight base rail and the curved tip rail can be made of alloy steel plates, and their hardness is usually above 380HBW, which can well meet the user's requirements for wear resistance and reduce the workload of maintenance and repair.

Description

Technical Field

[0001] The invention relates to the technical field of turnouts, in particular to a pedestal type tramway turnout structure. Background Art

[0002] In order to ease traffic pressure, more and more cities have begun to vigorously develop urban rail transit, such as trams, subways, elevated light rails, etc. Modern trams usually use grooved rails, such as Figure 1 As shown in the figure, the grooved rail also has the function of a wheel guard rail, which is beneficial to ensure the safety of small radius curves, effectively ensure the wheel flange passage space in shared right-of-way sections, and is conducive to the paving and protection of the pavement material on the inner side of the rail.

[0003] Turnouts are one of the three weak links in the traditional wheel-rail transportation system. Tram lines are flexible in layout and have small curve radius, so small turnout numbers, short turnout lengths, and a variety of turnout types are required. In addition, shared right-of-way sections are difficult to inspect, repair, and replace. These characteristics place higher demands on turnouts' impact resistance, wear resistance, and maintenance-free (or less) performance.

[0004] At present, the tram trough rail switches mainly include large pad type and integral alloy steel type.

[0005] Large pad type switch, such as Figure 2-3 As shown, the cost is low and the production efficiency is high, but it is difficult to assemble, the geometry of the turnout is difficult to maintain after laying, and the wear resistance does not meet the user's requirements.

[0006] Integral alloy steel switch, such as Figure 4-5 As shown, it is made of high-strength alloy steel with a yield strength of 1300MPa, and then welded to the guide rails at both ends. It has good integrity and wear resistance. The point rail adopts a self-locking mechanical connection and is easy to replace, but the production cycle is long and the cost is very high.

[0007] In general, users are increasingly questioning the assembly accuracy, wear resistance and maintenance of low-cost switches, while integral alloy steel switches often fail to meet user requirements in terms of delivery cycle and product price. Summary of the invention

[0008] In view of the shortcomings of the prior art, the present invention provides a pedestal type tramway switch structure, which not only has a short production cycle and low cost, but also has the advantages of high assembly precision, good wear resistance and low maintenance.

[0009] A tramway switch structure is mainly composed of a manganese steel base and a straight basic rail and a curved tip rail fixed inside the manganese steel base. The manganese steel base includes a first connecting section located at the head, a second connecting section located at the tail, and a base section located between the first connecting section and the second connecting section.

[0010] Furthermore, both sides of the bottom of the manganese steel base extend outward to form a fixing portion that is convenient for fastening with fasteners, and a accommodating cavity for accommodating the straight basic rail and the curved tip rail is provided inside; the straight basic rail and the curved tip rail are tightly attached to each other at the connection with the first connecting section, and gradually separate toward the second connecting section and respectively engage with the two grooved steel rails of the second connecting section; the accommodating cavity is separated into independent straight basic rail accommodating grooves and curved tip rail accommodating grooves near the second connecting section.

[0011] Furthermore, near one side of the first connecting section, the straight basic rail is fixed to the manganese steel base by bolts, and one side thereof is in contact with the side wall of the accommodating cavity.

[0012] Furthermore, close to the side of the second connecting section, the straight basic rail and the curved tip rail are respectively placed in the straight basic rail accommodating groove and the curved tip rail accommodating groove; the straight basic rail is fixed to the manganese steel base by bolts, and one side of the straight basic rail fits against the outer wall of the straight basic rail accommodating groove; one side of the curved tip rail fits against the inner wall of the curved tip rail accommodating groove, and the gap between the other side and the manganese steel base is filled with a wedge, and the wedge is fixed to the manganese steel base by bolts.

[0013] Furthermore, a point rail blind hole is provided at the bottom of the curved point rail, and a accommodating cavity blind hole is provided at a position corresponding to the accommodating cavity and the point rail blind hole. A pin is installed inside the accommodating cavity blind hole, and the pin extends out of the accommodating cavity blind hole and is embedded in the point rail blind hole.

[0014] The manganese base type tramway turnout structure provided by the present invention has a base that is integrally cast using high manganese steel, has a short process production cycle, a small processing amount, and a great advantage in production cost; since the base is integrally cast, after assembling the straight base rail and the curved tip rail, the overall structural stability is very good and the assembly accuracy is also higher; the straight base rail and the curved tip rail can be manufactured using alloy steel plates, the hardness of which is usually above 380 HBW, which can well meet the user's requirements for wear resistance and reduce the workload of maintenance and repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the groove rail structure;

[0016] Figure 2 This is a schematic diagram of a large pad type switch structure;

[0017] Figure 3It is a cross-sectional view of the large pad type switch structure at different positions;

[0018] Figure 4 It is a schematic diagram of the integral alloy steel switch structure;

[0019] Figure 5 It is a cross-sectional view of the front end of the integral alloy steel switch structure;

[0020] Figure 6 It is a manganese steel base type turnout switch structure;

[0021] Figure 7 It is a schematic diagram of the structure of the manganese steel base;

[0022] Figure 8 It is a cross-sectional view of the front end of the integral alloy steel switch structure;

[0023] Fig. 9 It is a cross-sectional view of the rear end of the integral alloy steel switch structure.

[0024] Explanation of the accompanying drawings: 1. Manganese steel base; 101. First connecting section; 102. Second connecting section; 103. Base section; 104. Fixing portion; 105. Accommodating cavity; 106. Straight basic rail accommodating groove; 107. Curved tip rail accommodating groove; 2. Straight basic rail; 3. Curved tip rail; 4. Wedge block; 5. Pin shaft. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0026] Example 1

[0027] A tramway switch structure, such as Figure 6 As shown, it is mainly composed of a manganese steel base 1 and a straight basic rail 2 and a curved tip rail 3 fixed inside the manganese steel base. The manganese steel base 1 includes a first connecting section 101 located at the head, a second connecting section 102 located at the tail, and a base section 103 located between the first connecting section and the second connecting section.

[0028] The base is made of high manganese steel as a whole, with a short production cycle and small processing volume, which has great advantages in production cost. Since the base is cast as a whole, after assembling the straight base rail and the curved tip rail, the overall structural stability is very good and the assembly accuracy is higher. The straight base rail and the curved tip rail can be made of alloy steel plates, and their hardness is usually above 380HBW, which can well meet the user's requirements for wear resistance and reduce the workload of maintenance and repair.

[0029] In order to facilitate the fixation of the manganese steel base, both sides of the bottom of the manganese steel base 1 extend outward to form a fixing portion 104 that is convenient for fasteners to buckle.

[0030] The fixing method of the stock rail and the point rail to the manganese steel base is that a receiving cavity 105 for receiving the straight stock rail and the curved point rail is provided inside the manganese steel base. Figure 7 As shown. The straight base rail and the curved tip rail are closely attached to each other at the connection of the first connecting section, and gradually separate toward the second connecting section and respectively engage with the two grooved steel rails of the second connecting section. The accommodating cavity is separated into a straight base rail accommodating groove 106 and a curved tip rail accommodating groove 107 that are independent of each other near the second connecting section.

[0031] from Figure 7 It can be seen that the first connecting section and the second connecting section are a small end section that is consistent with the shape of the rail. This design is to weld a small section of ordinary rail at the end of the first connecting section and the second connecting section before leaving the factory, which is convenient for welding with the line rail at the construction site.

[0032] At present, most trams are seamless lines. Since welding the base of manganese steel materials to ordinary steel rails is difficult, the construction site does not have the welding conditions. Before leaving the factory, a small section of ordinary steel rail is welded at the ends of the first and second connecting sections. When welding at the construction site, the small section of ordinary steel rail welded at the ends of the first and second connecting sections can be welded to the line rail, which solves the problem that the construction site does not have the conditions for welding the base of manganese steel materials to the line rail.

[0033] Close to the first connecting section, the straight base rail 2 is fixed to the manganese steel base 1 by bolts, and one side of the straight base rail 2 is in contact with the side wall of the accommodating cavity. Figure 8 The bolts pass through the straight basic rail and the side wall of the manganese steel base from the inside of the straight basic rail, and then are tightened by nuts, so that the point rail is close to the straight basic rail.

[0034] Close to the second connecting section, the straight base rail 2 and the curved tip rail 3 are placed in the straight base rail receiving groove 106 and the curved tip rail receiving groove 107 respectively. Fig. 9 The straight base rail 2 is fixed to the manganese steel base 1 by bolts, and one side of the straight base rail is in contact with the outer side wall of the straight base rail receiving groove 106; one side of the curved point rail 3 is in contact with the inner side wall of the curved point rail receiving groove 107, and the gap between the other side and the manganese steel base 1 is filled with a wedge 4, and the wedge 4 is fixed to the manganese steel base 1 by bolts. The inner side wall and outer side wall here are relative to the inside and outside of the manganese steel base, and are only for convenience of expression.

[0035] A point rail blind hole is provided at the bottom of the curved point rail 2, and a accommodating cavity blind hole is provided at the position corresponding to the point rail blind hole. A pin 5 is installed inside the accommodating cavity blind hole. The pin extends out of the accommodating cavity blind hole and is embedded in the point rail blind hole to limit the longitudinal movement of the point rail.

[0036] Finally, it should be noted that the above is only a specific embodiment of the present invention. Obviously, the present invention is not limited to the above embodiment, and there are many variations. All variations that can be directly derived or associated with the content disclosed by a person skilled in the art should be considered as the protection scope of the present invention.

Claims

1. A tramway switch structure, characterized in that: It is mainly composed of a manganese steel base and a straight base rail and a curved tip rail fixed inside the manganese steel base, wherein the straight base rail and the curved tip rail are made of alloy steel plates; The manganese steel base includes a first connecting section at the head, a second connecting section at the tail, and a base section between the first connecting section and the second connecting section, wherein the first connecting section and the second connecting section are a small end portion having the same shape as the rail; The two sides of the bottom of the manganese steel base extend outward to form a fixing portion that is convenient for buckling with a fastener, and a receiving cavity for receiving the straight base rail and the curved tip rail is provided inside; the straight base rail and the curved tip rail are closely attached to each other at the connection of the first connecting section, and gradually separate toward the second connecting section and respectively engage with the two grooved steel rails of the second connecting section; the receiving cavity is separated into a straight base rail receiving groove and a curved tip rail receiving groove that are independent of each other near the second connecting section; Close to one side of the first connecting section, the straight base rail is fixed to the manganese steel base by bolts, and one side thereof is in contact with the side wall of the accommodating cavity. Close to the side of the second connecting section, the straight base rail and the curved tip rail are respectively placed in the straight base rail accommodating groove and the curved tip rail accommodating groove; the straight base rail is fixed to the manganese steel base by bolts, and one side of the straight base rail is in contact with the outer side wall of the straight base rail accommodating groove; one side of the curved tip rail is in contact with the inner side wall of the curved tip rail accommodating groove, and the gap between the other side and the manganese steel base is filled with a wedge, and the wedge is fixed to the manganese steel base by bolts.

2. The tramway switch structure according to claim 1, characterized in that: A point rail blind hole is provided at the bottom of the curved point rail, and a accommodating cavity blind hole is provided at a position corresponding to the point rail blind hole. A pin is installed inside the accommodating cavity blind hole, and the pin extends out of the accommodating cavity blind hole and is embedded in the point rail blind hole.

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