CN216237909U - A single turnout lateral guard rail - Google Patents

Abstract

The utility model provides a single turnout lateral guard rail, which comprises a lateral guard rail (1) and a curved basic rail (2), wherein the lateral guard rail (1) is longitudinally arranged on one side of the curved basic rail (2), the lateral guard rail (1) is a bent guard rail, the bending point is 1200-1300 mm away from the front end of the guard rail, the bending angle is 0.15-0.20 degrees, the central line of the lateral guard rail (1) is the same as the corresponding longitudinal position line of the curved basic rail (2), and the length of the lateral guard rail (1) is more than or equal to 5000 mm; the curved stock rail (2) comprises a first arc line section (21), a straight line gauge transition section (22), a second arc line section (23) and a straight line section (24) which are sequentially connected end to end, and the lateral guard rail (1) is arranged at the corresponding position of the second arc line section (23) and the straight line section (24). The utility model can obviously increase the length of the guard rail, simultaneously avoid the condition of track gauge widening in the guard rail area, reduce the difficulty of on-site maintenance and repair, simultaneously avoid the risk of the wheels impacting the opening section of the guard rail and ensure the driving safety.

Description

A single turnout lateral guard rail

technical field

The utility model relates to the field of rails, in particular to a lateral guard rail of a single-opening switch.

Background technique

At present, there are three types of single turnouts that are widely used in the main line of urban rail transit projects in my country: 50kg/m rail No. 9 single switch, 60kg/m rail No. 9 single switch and 60kg/m rail No. 12 single switch. Among these three types of turnouts, the 60kg/m rail No. 9 single turnout is the most widely used.

According to the type of point rail, the turnout can be divided into two types: straight point rail switch and curved point rail switch. The technical characteristics of the linear point track switch are that the point rail is short, the two point rails can be manufactured symmetrically, and the heel end is a joint, which is flexible in pulling and slightly less stable. A switch machine is required, and the lateral allowable speed is average. is 30km/h. The technical characteristics of the curved point track switch are that the point rail is long, the two point rails are not manufactured symmetrically, and the heel end is connected by a joint splint, which has good stability and needs to be equipped with two or more switch machines. The lateral allowable passing speed is generally 35km/h. The 60kg/m steel rail No. 9 straight-pointed rail and single-opening turnout of the curved-pointed rail are widely used in urban rail transit projects in my country, and the technology is relatively mature and reliable.

The existing 60kg/m steel rail No. 9 single-opening turnout lateral guard rail has a short length and a large attack angle of the guard rail buffer section. The service life of the components is relatively unfavorable.

There is a need for a lateral guard rail for a single turnout to solve the above problems.

SUMMARY OF THE INVENTION

In order to solve the problem that the existing 60kg/m steel rail No. 9 single-opening turnout in the prior art has a short lateral guard rail length, a larger attack angle of the guard rail buffer section, and a relatively obvious impact effect when the vehicle passes through the frog area, the utility model has the advantages of The problems of vehicle running stability and service life of guard rails and related components are relatively unfavorable. A lateral guard rail of a single turnout is provided, which solves the above problems by increasing the length of the guard rail and adopting a bending guard rail.

The utility model provides a lateral guard rail for a single-opening switch, which comprises a lateral guard rail and a curved basic rail. The lateral guard rail is longitudinally arranged on one side of the curved basic rail. The inflection point is 1200mm～1300mm away from the front end of the guard rail, the bending angle is 0.15°～0.20°, the center line of the lateral guard rail is the same as the corresponding longitudinal position of the curved basic rail; the curved basic rail includes the first arc line segment connected end to end. , the linear gauge transition section, the second arc line section and the straight section, and the lateral guard rail is arranged at the corresponding position of the second arc line section and the straight section; the lateral guard rail includes the lateral guard rail body and the lateral guard rail working edge The working edge of the lateral guard rail is arranged on the longitudinal side of the lateral guard rail and corresponding to the working edge of the curved basic rail; an open section, a first buffer section, a straight section, a second buffer section and a second open section, the first open section, the first buffer section, the straight section, the second buffer section and the second open section are connected in sequence, the first The first opening section, the first buffer section, the straight section, the second buffer section and the second opening section are all straight sections.

In order to provide better protection for the frog area and reduce the impact of the wheels on the guard rail buffer section, it is necessary to increase the length of the guard rail and the length of the guard rail buffer section. Increase the length of the guard rail from the original 3800mm to more than 5000mm.

For the lateral guard rail of the single-opening switch according to the present utility model, as a preferred method, the first arc line segment is a 1445mm arc line, the radius of the first arc line segment is 194272.5mm; the second arc line segment is a 1435mm arc line line, the radius of the second arc segment is 194282.5mm.

For the lateral guard rail of the single-opening turnout described in the utility model, as a preferred method, the length of the transition section of the linear gauge is ≥2500mm.

The length of the guard rail cannot be simply increased. After the length of the guard rail increases, it will bring a series of problems, which need to be solved and optimized accordingly. First of all, after the length of the guard rail is increased, it is necessary to adjust the curved basic rail line type accordingly to ensure that the widened section of the curved gauge ends before entering the guard rail area, that is, to ensure that the guard rail area is all standard gauge. Because if there is a widening of the gauge in the guard rail area, correspondingly, the opening section of the guard rail and the rim groove of the buffer section also need to be correspondingly widened, but during the on-site maintenance and repair, the opening section of the guard rail and the rim groove of the buffer section are generally Control according to the existing fixed value. In this way, the risk of the train wheels hitting the end of the guard rail will be caused, and the driving safety will be affected. Therefore, there should be no gauge widening in the guard rail area.

After increasing the length of the lateral guard rail, at the same time, optimize the basic track profile of the 60kg/m rail No. 9 single turnout curve. In the area adjacent to the guard rail, set a straight transition section of not less than 2500mm, and transition the 1445mm gauge back to the standard in advance. In this way, the basic track type of the guide curve and frog area curve is: the arc line with a gauge of 1445mm (radius 194272.5mm) + the transition section of the linear gauge (length ≥ 2500mm) + the arc with a gauge of 1435mm Line (radius 194282.5mm) + straight line.

For the lateral guard rail of a single-opening switch described in the utility model, as a preferred method, the control value of the rim groove of the first opening section and the second opening section is 80 mm; the rim groove control value of the first buffer section and the second buffer section is controlled The value is 65mm; the control value of the rim groove of the straight section is 42mm.

For the lateral guard rail of the single-opening switch according to the present invention, as a preferred method, the length of the first opening section and the length of the second opening section are 150 mm; the length of the first buffer section is 2100 mm to 2400 mm; the length of the second buffer section is 1500mm～1800mm; the length of the straight section is 1200mm.

Under normal circumstances, the guard rails are all straight. After the length of the lateral guard rail of the turnout increases, the matching relationship with the curved basic rail will become worse, and the opening amount between the front section of the guard rail and the curved basic rail will gradually increase. The following problems are brought about: the guard rail pads of the same type and size will not be applicable to the front section of the guard rail, and it needs to be designed separately, which increases the difficulty of factory manufacturing and on-site maintenance, and increases the types and quantities of spare parts.

Based on this problem, after the length of the guard rail is increased, it is designed as a bending guard rail, the bending point is 1200mm~1300mm from the front end of the guard rail, and the bending angle is 0.15°~0.20°. It is basically the same to ensure that the guard rail pads of the same type can be used normally, and no additional types of guard rail pads are added. In addition, after the guard rail is bent, it will increase the number of fold points on the working side of the guard rail and increase the difficulty of maintenance and repair. Therefore, after the guard rail is bent, the working side is sliced to ensure that the working side is still composed of five straight lines: the opening section. (150mm) + buffer section (2100mm ~ 2400mm) + straight section (1200mm) + buffer section (1500mm ~ 1800mm) + open section (150mm), and at the same time ensure that the open section, buffer section, and straight section rim groove control values are not change (respectively still 80mm, 65mm, 42mm).

When the vehicle passes through the frog area, the wheel may collide with the guard rail, which will change the running direction of the wheel and affect the dynamic performance of the vehicle.

Suppose the angle of attack of the buffer section of the guard rail is a, the speed of the wheel before the collision with the guard rail is v, and the direction of the velocity changes after the collision, and the speed is reduced from v to vcosa, then the kinetic energy loss during the collision is:

w=v ² sin ² a

The greater the kinetic energy loss w, the worse the dynamic performance of the vehicle when passing through the frog, the shorter the service life of the guard rail and related components, and the greater the maintenance and repair workload.

There is a corresponding relationship between the kinetic energy loss w and the attack angle a of the buffer section of the guard rail. The larger the attack angle of the buffer section, the greater the kinetic energy loss.

The invention can significantly increase the length of the lateral guard rail and the length of the buffer section, thereby effectively reducing the attack angle of the guard rail buffer section (the attack angle is reduced from ≈ 1.10° to ≈ 0.55°), thereby effectively reducing the impact of the wheel on the guard rail. The kinetic energy loss (the kinetic energy loss is reduced from ≈0.45km2/h2 to ≈0.11km2/h2), improves the dynamic performance of the vehicle when passing through the frog, can significantly improve the service life of the guard rail and related components, and reduce the corresponding maintenance work quantity.

The beneficial effects of the utility model are as follows:

(1) Significantly increase the length of the lateral guard rail, which can reduce the attack angle of the guard rail buffer section (the attack angle is reduced from ≈ 1.10° to ≈ 0.55°), improve the dynamic performance of the vehicle when passing through the frog, and can significantly improve the guard rail. The service life of the rail and related components is reduced, and the corresponding maintenance and repair workload is reduced.

(2) While significantly increasing the length of the guard rail, it avoids the widening of the gauge in the guard rail area, reduces the difficulty of on-site maintenance and repair, and at the same time avoids the risk of the wheels hitting the guard rail opening section, ensuring driving safety.

(3) While significantly increasing the length of the guard rail, it is still possible to use a uniform type of guard rail pad, and adopt the existing maintenance and repair standards to reduce the difficulty of manufacturing and maintenance.

Description of drawings

Fig. 1 is a kind of single-opening switch side guard rail schematic diagram;

2 is a schematic diagram of a curved basic rail of a lateral guard rail of a single turnout;

3 is a schematic diagram of a lateral guard rail of a single-opening switch;

Figure 4 is a schematic diagram of the working edge of a lateral guard rail of a single-opening switch.

Reference number:

1. Lateral guard rail; 11. Lateral guard rail body; 12. Side guard rail working side; 121, First opening section; 122, First buffer section; 123, Straight section; 124, Second buffer section ; 125, the second opening segment; 2, the curved basic rail; 21, the first arc line segment; 22, the linear gauge transition segment; 23, the second arc line segment; 24, the straight line segment.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present utility model. It is obvious that the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example.

Example 1

As shown in Fig. 1, a side guard rail of a single-opening switch includes a side guard rail 1 and a curved basic rail 2. The side guard rail 1 is longitudinally arranged on one side of the curved basic rail 2, and the side guard rail 1 is curved. Folding guard rail, the bending point is 1200mm～1300mm from the front end of guard rail, the bending angle is 0.15°～0.20°, the center line of side guard rail 1 is the same as the corresponding longitudinal position of curved basic rail 2, and the length of side guard rail 1 is the same. ≥5000mm.

As shown in FIG. 2 , the curved basic rail 2 includes a first circular arc segment 21 , a linear gauge transition segment 22 , a second circular arc segment 23 and a linear segment 24 , which are connected end to end. The lateral guard rail 1 is arranged on the second The arc line segment 23 and the straight line segment 24 correspond to positions. The first arc line segment 21 is a 1445mm arc line, and the radius of the first arc line segment 21 is 194272.5mm; the second arc line segment 23 is a 1435mm arc line, and the radius of the second arc line segment 23 is 194282.5mm. The length of the linear gauge transition section 22 is greater than or equal to 2500mm.

As shown in FIG. 3 , the side guard rail 1 includes a side guard rail body 11 and a side guard rail working side 12 , and the side guard rail working side 12 is arranged on the longitudinal side of the side guard rail 1 to work with the curved basic rail 2 . Edge Correspondence Settings

As shown in FIG. 4 , the working edge 12 of the lateral guard rail is a planed edge based on a curved guard rail, and the working edge 12 of the lateral guard rail includes a first opening section 121 , a first buffer section 122 , a straight section 123 , a first Two buffer sections 124 and second open sections 125, the first open section 121, the first buffer section 122, the straight section 123, the second buffer section 124 and the second open section 125 are connected in sequence, the first open section 121, the first The buffer section 122 , the straight section 123 , the second buffer section 124 and the second opening section 125 are all straight sections. The control value of the rim groove of the first opening section 121 and the second opening section 125 is 80mm; the control value of the rim groove of the first buffer section 122 and the second buffer section 124 is 65mm; the control value of the rim groove of the straight section 123 is 42mm. The length of the first opening section 121 and the length of the second opening section 125 are 150mm; the length of the first buffer section 122 is 2100mm-2400mm; the length of the second buffer section 124 is 1500mm-1800mm; the length of the straight section 123 is 1200mm.

The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. Equivalent replacement or modification of the new technical solution and its utility model concept shall be included within the protection scope of the present utility model.

Claims (5)

1. The utility model provides a singly open switch side direction guardrail which characterized in that: the bending type side guard rail comprises a side guard rail (1) and a curved stock rail (2), wherein the side guard rail (1) is longitudinally arranged on one side of the curved stock rail (2), the side guard rail (1) is a bending type guard rail, the bending point is 1200-1300 mm away from the front end of the guard rail, the bending angle is 0.15-0.20 degrees, and the central line of the side guard rail (1) is the same as the corresponding longitudinal position line type of the curved stock rail (2); the curved stock rail (2) comprises a first arc line section (21), a straight line gauge transition section (22), a second arc line section (23) and a straight line section (24) which are sequentially connected end to end, and the lateral guard rail (1) is arranged at the corresponding position of the second arc line section (23) and the straight line section (24); the lateral guard rail (1) comprises a lateral guard rail body (11) and a lateral guard rail working edge (12), and the lateral guard rail working edge (12) is arranged on one longitudinal side of the lateral guard rail (1) and corresponds to the working edge of the curved stock rail (2); side direction guardrail work limit (12) are for being based on bending type guardrail digs the side cut, side direction guardrail work limit (12) include first opening section (121), first buffer segment (122), straight section (123), second buffer segment (124) and second opening section (125), first opening section (121) first buffer segment (122) straight section (123) second buffer segment (124) with second opening section (125) connect gradually, first opening section (121) first buffer segment (122) straight section (123) second buffer segment (124) with second opening section (125) are the straightway.

2. The single switch lateral guardrail of claim 1, wherein: the first arc line segment (21) is a 1445mm arc line, and the radius of the first arc line segment (21) is 194272.5 mm; the second arc line segment (23) is a 1435mm arc line, and the radius of the second arc line segment (23) is 194282.5 mm.

3. The single switch lateral guardrail of claim 2, wherein: the length of the linear track gauge transition section (22) is more than or equal to 2500 mm.

4. The single switch lateral guardrail of claim 1, wherein: the rim groove control value of the first opening section (121) and the second opening section (125) is 80 mm; the rim groove control value of the first buffer section (122) and the second buffer section (124) is 65 mm; the control value of the rim groove of the straight section (123) is 42 mm.

5. The single switch lateral guardrail of claim 4, wherein: the first opening section (121) and the second opening section (125) are 150mm in length; the length of the first buffer section (122) is 2100 mm-2400 mm; the length of the second buffer section (124) is 1500 mm-1800 mm; the length of the straight section (123) is 1200 mm.

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