Applicable to 762mm gauge 3.5 symmetrical turnout and its construction method

Abstract

The present invention provides a symmetrical turnout suitable for 762mm gauge 3.5 and a construction method thereof, wherein the symmetrical turnout has a total length a of 7720-7724mm and a front length a of 1 3551~3555mm, rear length a 2 The track width of the switch is 4167-4171 mm, and the switch is composed of a switch part, a switch fork and a guard rail part, wherein: the switch part includes two basic rails, two point rails and two switch rails, the point rails are connected to the switch rails, and both are located between the two basic rails, and the two point rails are curved structures, and the ends can alternately cling to the basic rails on the same side. The present invention provides a 762 mm track gauge symmetrical turnout, which can realize the smooth track change of the train and ensure the safety of the train.

Description

Technical Field

[0001] The invention relates to the field of railways, and in particular to a symmetrical turnout suitable for a 762mm gauge 3.5 and a construction method thereof. Background Art

[0002] At present, most of the turnouts for domestic railways and urban rail transit are of 1435mm standard gauge. There are fewer railways with 762mm gauge, which are only used in a few tourist trains. However, with the vigorous development of military-civilian integration projects in the domestic market, the application of 762mm gauge turnouts is becoming more and more extensive. Most of the 762mm gauge turnouts are built in tunnels, with limited available space, low operating speed, and often large axle weight. They are fundamentally different from the 1435mm standard gauge. The existing standard gauge turnouts and their related designs cannot be applied to 762mm gauge turnouts. Based on actual applications, the design of 762mm gauge turnouts is relatively difficult, and there are few 762mm gauge turnouts in China. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a symmetrical turnout No. 3.5 suitable for 762mm gauge and a construction method thereof, combines the latest turnout research and development technology, adopts the turnout structure most suitable for this type of project, fills the gap in 762mm gauge turnouts, and ensures the safe and efficient application of 762mm gauge turnouts.

[0004] To achieve the above purpose, the technical solution adopted by the embodiment of the present invention is as follows:

[0005] Applicable to 3.5 symmetrical turnouts with a track gauge of 762mm. The symmetrical turnout has a total length a of 7720-7724mm, a front length a1 of 3551-3555mm, and a rear length a2 of 4167-4171mm. It consists of a switch part, a frog and a guardrail part, wherein:

[0006] The switch part includes two basic rails, two point rails and two switch guide rails. The point rails are connected to the switch guide rails, and both are located between the two basic rails. The two point rails are curved structures, and the ends can alternately cling to the basic rails on the same side.

[0007] The frog and guard rail part includes a frog heart rail, two wing rails and two guard rails, the frog heart rail is located at the intersection of the turnout side line rail and the turnout main line rail, the wing rails are connected to the switch guide rail, the wing rails are connected to the frog heart rail, the guard rails are located on the inner side of the rail guide rail, and the rail guide rail is connected to the basic rail.

[0008] Furthermore, the length of the pointed rail is 2178-2182 mm; the pointed rail is provided with a traction point, and the travel is 128-132 mm.

[0009] Furthermore, the switch guide rail has a length of 2385 to 2395 mm and a curve radius of 48 to 52 m.

[0010] Furthermore, the basic rail has a length of 4055-4065 mm.

[0011] Furthermore, the total length a of the symmetrical turnout is 7722 mm, and the front length a 1 3553mm, rear length a 2 It is 4169mm; the length of the pointed rail is 2180mm, the pointed rail is provided with a traction point, and the travel is 130mm; the length of the switch guide rail is 2390mm, and the curve radius is 50m; the length of the basic rail is 4060mm.

[0012] Furthermore, the inspection interval of the symmetrical turnout is Dx≥725, and the inspection interval Dy≤707.

[0013] Furthermore, the switch guide rail is a bridge-type bending structure and is centrally symmetrical; and the rail guide rail is a bending structure.

[0014] Furthermore, a spacer is provided at the connection between the point rail and the switch guide rail, and the spacer includes a spacer block and a spacer column. The spacer block extends the connection between the point rail and the switch guide rail, and one side is close to the point rail and the switch guide rail, and the other side is close to the basic rail. The spacer column passes through the spacer block, one end of which is connected to the point rail or the switch guide rail, and the other end is connected to the basic rail.

[0015] Furthermore, the basic rail is pressed onto the base plate by a fastener, and the fastener includes a rail moment block, a spring bar seat, a spring bar and an anchor bolt. The spring bar seat is fixed to the base plate, and the rail moment block is clamped onto the basic rail. One side of the spring bar is pressed onto the spring bar seat, and the other side is pressed onto the rail moment block. The anchor bolt penetrates the spring bar, thereby squeezing the rail moment block to press the basic rail onto the base plate.

[0016] The present invention also provides a construction method applicable to a 762mm gauge 3.5 symmetrical turnout:

[0017] Step 1) Lay the basic rail 11 to 4055-4065 mm, connect the tail of the basic rail to the rail guide by a rail gap of 5-8 mm, and lay the rail guide for 3675-3680 m;

[0018] Step 2) Lay the switch rail 12 to 2178-2182 mm, connect the tail of the switch rail to the switch rail with a rail gap of 5-8 mm, lay the switch rail to 2385-2395 mm, and control the switch rail curve radius to 48-52 m;

[0019] Step 3) The tail of the switch rail is connected to the wing rail according to the rail gap of 5-8mm, the wing rail is laid 1827-1831mm, the frog heart rail is laid at the intersection of the turnout siding rail and the turnout main line rail, and is connected to the bend of the wing rail, and the inspection interval Dx is controlled to be ≥725 and the inspection interval Dy is ≤707;

[0020] Step 4) Installing a spacer at the connection between the point rail and the switch rail to connect the point rail, the switch rail and the base rail;

[0021] Step 5) The top surface of the symmetrical turnout rail is quenched over its entire length.

[0022] The symmetrical turnout for No. 3.5 with a track gauge of 762 mm and the construction method thereof of the present invention have the following beneficial effects:

[0023] 1. The present invention provides a symmetrical turnout suitable for 762mm gauge No. 3.5. It can perfectly adapt to the working conditions of 762mm gauge, axle weight not more than 21t, and lateral speed not more than 10km / h, and is applied to narrow-gauge railways, tourist sightseeing trains and military-civilian integration projects, filling the gap in the turnout market in terms of 762mm gauge symmetrical turnouts.

[0024] 2. The symmetrical turnout of the present invention is composed of a switch part, a frog and a guardrail part, avoiding the connection part used to connect the switch part, the frog and the guardrail part in the conventional symmetrical turnout design, and directly connects the switch part with the frog and the guardrail part. Under the premise of ensuring the smooth track switching function of the turnout, the laying space is reduced as much as possible, breaking through the limitation of limited space in the tunnel.

[0025] 3. The present invention has a symmetrical turnout with a total length of 7720-7724mm, a front length of 3551-3555mm, and a rear length of 4167-4171mm; a point rail length of 2178-2182mm; a switch rail length of 2385-2395mm, a curve radius of 48-52m; and a base rail length of 4055-4065mm. A systematic 762mm gauge symmetrical turnout design is provided, and it has been verified in practice that the traffic stability is good, the track change is smooth, and the effective track change and safe driving of the train can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0027] Figure 1 This is a schematic structural diagram of a symmetrical turnout suitable for 762mm track gauge No. 3.5 according to an embodiment of the present invention;

[0028] Figure 2 A schematic structural diagram of a switch guide rail according to an embodiment of the present invention;

[0029] Figure 3 A schematic structural diagram of a steel rail guide rail according to an embodiment of the present invention;

[0030] Figure 4 A schematic structural diagram of a switch part of an embodiment of the present invention;

[0031] Figure 5 for Figure 4 A schematic diagram of the structure of part A in the middle;

[0032] Figure 6 for Figure 5 A schematic diagram of the structure enlarged at B'-B';

[0033] Figure 7 for Figure 4 A'-A' in the middle is an enlarged schematic diagram of the structure;

[0034] Figure 8 The diagram is a partial structural diagram of a frog and a guard rail according to an embodiment of the present invention.

[0035] Description of reference numerals:

[0036] 1- switch part; 11- basic rail; 12- point rail; 121- tie rod; 13- guide rail; 2- frog and guard rail part; 21- frog heart rail; 22- wing rail; 23- guard rail; 3- turnout siding rail; 4- turnout main line rail; 5- rail guide rail; 6- spacer; 61- spacer block; 62- spacer column; 63- rut heel pad, 64- rail support; 7- fastener; 71- rail moment block; 72- spring bar seat; 73- spring bar; 74- anchor bolt; 8- pad. DETAILED DESCRIPTION

[0037] In order to better understand the purpose, structure and function of the present invention, the symmetrical turnout applicable to 762mm gauge No. 3.5 and the construction method thereof are further described in detail below in conjunction with the accompanying drawings.

[0038] like Figure 1-8 As shown, it is a symmetrical turnout suitable for 762mm gauge 3.5 No., more specifically, a symmetrical turnout suitable for 762mm gauge P50 (50kg / m) rail 3.5 No. . The total length a of the symmetrical turnout is 7720-7724mm, and the front length a 1 3551~3555mm, rear length a 2 Preferably, the total length a of the symmetrical turnout is 7722 mm, and the front length a 13553mm, rear length a 2 The entire symmetrical turnout is small in size and occupies a small space, which can adapt to working conditions with limited space such as tunnels and complete the track change of trains well.

[0039] Furthermore, the 762mm gauge symmetrical turnout is composed of a switch part 1 and a frog and guardrail part 2. Among them:

[0040] The switch part 1 includes two base rails 11, two point rails 12 and two switch rails 13. The point rails 12 are connected to the switch rails 13, and both are located between the two base rails 11. The two point rails 12 are curved structures, and the ends of the two point rails 12 are alternately close to the base rails 11 on the same side through the pull rod 121. The alternating close here means that the ends of the point rails 12 are pulled and pushed by the switch machine (traction mechanism), and the two point rails 12 move synchronously until the end of one point rail 12 is close to the base rail 11 on the same side, and the end of the other point rail 12 is away from the base rail 11 on the same side. Figure 1 In the embodiment shown, the end of the upper point rail 12 is in contact with the upper base rail 11, and the end of the lower point rail 12 is away from the lower base rail 11, so the train runs on the lower turnout siding rail.

[0041] Furthermore, the point rail is made of 50AT rail, and the length of the point rail 12 is 2178-2182 mm; the point rail 12 is provided with a traction point, and the travel is 128-132 mm. Preferably, the length of the point rail 12 is 2180 mm; the point rail 12 is provided with a traction point, and the travel is 130 mm. The traction point is connected to the switch machine, and the switch machine drives the point rail 12 away from or close to the same side basic rail 11.

[0042] Further, the length of the switch rail 13 is 2385-2395 mm, the curve radius is 48-52 m, and the turning angle is 15.95°. Preferably, the length of the switch rail 13 is 2390 mm, and the curve radius is 50 m. The smaller the curve radius of the switch rail, the smaller the space occupied by the entire switch rail construction, avoiding the limitation of space limitation.

[0043] Furthermore, the base rail is made of 50kg / m steel rail, and the length of the base rail 11 is 4055-4065mm. Preferably, the length of the base rail 11 is 4060mm.

[0044] Furthermore, the switch guide rail 13 is a bridge-type bending structure, which is centrally symmetrical; and the rail guide rail 5 is a bending structure.

[0045] Furthermore, the frog and guard rail part 2 includes a frog heart rail 21, two wing rails 22 and two guard rails 23. The frog heart rail 21 is located at the intersection of the switch side rail 3 and the switch main line rail 4. The wing rails 22 are connected to the switch guide rail 13. The wing rails 22 are connected to the frog heart rail 21. The guard rail 23 is located on the inner side of the rail guide 5, and the rail guide 5 is connected to the basic rail 11.

[0046] Furthermore, the inspection interval of the symmetrical turnout is Dx≥725, and the inspection interval is Dy≤707.

[0047] Furthermore, a spacer 6 is provided at the connection between the point rail 12 and the switch rail 13. The spacer 6 can ensure a flexible and stable connection at the connection node between the two when the end of the point rail 12 moves away from or approaches the base rail 11 on the same side, thereby avoiding a connection break. Specifically, the spacer 6 includes a spacer block 61 and a spacer column 62. The spacer block 61 extends the connection between the point rail 12 and the switch rail 13, and one side is close to the point rail 12 and the switch rail 13, and the other side is close to the base rail 11. The spacer column 62 passes through the spacer block 61, and one end thereof passes through the point rail 12 or the switch rail 13, and the other end passes through the base rail 11.

[0048] Furthermore, the base rail 11 is buckled on the backing plate 8 by the fastener 7, which includes a rail moment block 71, a spring bar seat 72, a spring bar 73 and an anchor bolt 74. The spring bar seat 72 is fixed on the backing plate 8, the rail moment block 71 is clamped on the base rail 11, one side of the spring bar 73 is pressed on the spring bar seat 72, and the other side is pressed on the rail moment block 71, and the anchor bolt 74 penetrates and presses the spring bar 73, thereby squeezing the rail moment block 71 to buckle the base rail 11 on the backing plate 8. The fastener 7 is exquisitely designed and has high buckling reliability.

[0049] Furthermore, the top surfaces of all turnout rails including the basic rail 11, rail guide rail 5, point rail 12, switch rail 13, etc. are fully quenched, and the connecting rail gaps between the rails are controlled to be 5 to 8 mm.

[0050] The present invention also provides a construction method applicable to a 762mm gauge 3.5 symmetrical turnout:

[0051] Step 1) Lay the basic rail 11 to 4055-4065 mm, the tail of the basic rail 11 is connected to the rail guide 5 according to the rail gap of 5-8 mm, and the rail guide 5 is laid for 3675-3680 m;

[0052] Step 2) The switch rail 12 is laid to 2178-2182 mm, the tail of the switch rail is connected to the switch rail 13 with a rail gap of 5-8 mm, the switch rail 13 is laid to 2385-2395 mm, and the curve radius of the switch rail 13 is controlled to be 48-52 m;

[0053] Step 3) The tail of the switch rail 13 is connected to the wing rail 22 according to the rail gap of 5-8mm, the wing rail 22 is laid 1827-1831mm, the frog heart rail 21 is laid at the intersection of the turnout siding rail 3 and the turnout main line rail 4, and is connected to the bend of the wing rail 22, and the inspection interval Dx is controlled to be ≥725 and the inspection interval Dy is ≤707;

[0054] Step 4) Install the spacer 6 at the connection between the point rail 12 and the switch rail 13 to connect the point rail 12, the switch rail 13 and the base rail 11;

[0055] Step 5) The top surface of the symmetrical turnout rail is quenched over its entire length.

[0056] The present invention is further described below with the aid of specific embodiments, but it should be understood that the specific description here should not be construed as limiting the essence and scope of the present invention, and various modifications made to the following embodiments by ordinary technicians in the field after reading this specification are all within the scope of protection of the present invention.

Claims

1. A construction method applicable to 762mm gauge 3.5 symmetrical turnouts, characterized in that: The symmetrical turnout using the construction method has a total length a of 7720-7724 mm, a front length a1 of 3551-3555 mm, and a rear length a2 of 4167-4171 mm. It is composed of a switch part (1), a frog and a guardrail part (2), wherein: The switch part (1) comprises two basic rails (11), two point rails (12) and two switch guide rails (13); the point rail (12) is connected to the switch guide rail (13), and both are located between the two basic rails (11); the two point rails (12) are of curved structure, and their ends are alternately close to the basic rails (11) on the same side; The frog and guard rail part (2) comprises a frog heart rail (21), two wing rails (22) and two guard rails (23), the frog heart rail (21) is located at the intersection of the turnout siding rail (3) and the turnout main line rail (4), the wing rails (22) are connected to the switch guide rail (13), the wing rails (22) are connected to the frog heart rail (21), and the guard rail (23) is located on the inner side of the rail guide rail (5), and the rail guide rail (5) is connected to the base rail (11); The construction method comprises the following steps: Step 1) Lay the basic rail (11) 4055~4065mm, the tail of the basic rail (11) is connected to the steel rail guide (5) with a rail gap of 5~8mm, and the steel rail guide (5) is laid for 3675~3680m; Step 2) Lay the switch rail (12) 2178~2182mm, connect the tail of the switch rail (12) to the switch rail (13) with a rail gap of 5~8mm, lay the switch rail (13) 2385~2395mm, and control the curve radius of the switch rail (13) to 48~52m; Step 3) The tail of the switch rail (13) is connected to the wing rail (22) with a rail gap of 5-8 mm. The wing rail (22) is laid at 1827-1831 mm. The frog center rail (21) is laid at the intersection of the turnout siding rail (3) and the turnout main line rail (4) and connected to the bend of the wing rail (22). The inspection interval Dx is controlled to be ≥725 and the inspection interval Dy is ≤707. Step 4) Installing a spacer (6) at the connection between the point rail (12) and the switch rail (13) to connect the point rail (12), the switch rail (13) and the base rail (11); Step 5) The top surface of the symmetrical turnout rail is quenched over its entire length.

2. The construction method for a 762mm gauge 3.5 symmetrical turnout as claimed in claim 1, wherein the pointed rail (12) is provided with a traction point and a travel range of 128-132mm.

3. The construction method for a 762mm gauge 3.5 symmetrical turnout as claimed in any one of claims 1 to 2, characterized in that: The total length a of the symmetrical turnout is 7722 mm, the front length a1 is 3553 mm, and the rear length a2 is 4169 mm; the length of the point rail (12) is 2180 mm, the point rail (12) is provided with a traction point, and the travel is 130 mm; the length of the switch guide rail (13) is 2390 mm, and the curve radius is 50 m; the length of the basic rail (11) is 4060 mm.

4. The construction method for 762mm gauge 3.5 symmetrical turnout as claimed in claim 3, characterized in that: The switch guide rail (13) is a bridge-shaped bent structure and is centrally symmetrical; the steel rail guide rail (5) is a bent structure.

5. The construction method for 762mm gauge 3.5 symmetrical turnout as claimed in claim 4, characterized in that: A spacer (6) is provided at the connection between the point rail (12) and the switch guide rail (13), and the spacer (6) comprises a spacer block (61) and a spacer column (62). The spacer block (61) extends the connection between the point rail (12) and the switch guide rail (13), and one side of the spacer block (61) is closely attached to the point rail (12) and the switch guide rail (13), and the other side of the spacer column (62) is closely attached to the base rail (11). The spacer column (62) passes through the spacer block (61), one end of the spacer column passes through the point rail (12) or the switch guide rail (13), and the other end of the spacer column passes through the base rail (11).

6. The construction method for 762mm gauge 3.5 symmetrical turnout according to claim 5, characterized in that: The basic rail (11) is buckled onto the backing plate (8) via a fastener (7); the fastener (7) comprises a rail moment block (71), a spring bar seat (72), a spring bar (73) and an anchor bolt (74); the spring bar seat (72) is fixed onto the backing plate (8); the rail moment block (71) is clamped onto the basic rail (11); one side of the spring bar (73) is pressed onto the spring bar seat (72) and the other side is pressed onto the rail moment block (71); the anchor bolt (74) penetrates and presses the spring bar (73), thereby squeezing the rail moment block (71) to buckle the basic rail (11) onto the backing plate (8).

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