JP2008308893A - Snow melting and freeze proofing device for turnout - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a snow melting and freeze proofing device which is proof against damage of a floor plate in spite of vibration of a rail during passage of trains, and excellent in durability and heat efficiency. <P>SOLUTION: There is provided a turnout which is set up by fixing a stock rail on the floor plate on a sleeper, and arranging a tongue rail inside the stock rail in a manner sliding on the floor plate, and functions to switch a point by moving the tongue rail. Herein a tongue rail sliding plate portion of the floor plate has a plurality of insulated wire insertion holes bored therein near an upper surface thereof at predetermined intervals, and insulated wires are inserted into the insulated wire insertion holes, respectively. Then an AC source is connected to the tip of each insulated wire, and therefore the floor plate functions as a heating steel plate heated due to Joule heat. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a snow melting / freezing preventing device in a railway branching device using a skin current heating method in an induction heating method.

The following various snow melting / freezing prevention devices have been employed at rail points in railways in snowfall areas.
-Heating with Cantera: Prepare Cantera from under the rail to melt snow and prevent freezing. In heavy snow areas, oil supply to Cantera is frequent, and management at night and early morning is particularly troublesome. In recent years, operation personnel arranged at a station have been deleted due to CTC (train centralized control device) conversion, and it is difficult to secure personnel to cook Kantera.
-Heating by hot water circulation: Hot water is circulated through piping provided along the rails to melt snow and prevent freezing. This method has large facilities such as a boiler, a kerosene tank, and piping, and it is difficult to secure an installation place, and management such as replenishment of kerosene is complicated. In addition, when a pump heater or the like fails, the hot water piping may be damaged due to freezing and expansion of water, and it is extremely uneconomical to pass hot water regardless of day or night or cold and warm during the snowfall period.
・ Electric heating: Electric heating includes resistance heating, arc heating, induction heating, infrared heating, beam heating, and other methods, but snow melting / freezing prevention devices in branching devices using skin current heating tubes in induction heating Has various advantages as compared with the heating method by Kantera and the heating method by hot water circulation.

The skin current heating method is a heating system that utilizes the fact that when an insulated wire is passed through a steel pipe that is a ferromagnetic material and an AC voltage of commercial frequency is applied, current flows only to the inner wall of the steel pipe and heat is generated by Joule heat. is there.
In the snow melting / freezing prevention device in the branching device using the skin current heating tube, as shown in FIG. 7A, an AC power source 24 is connected to one end side of an insulated wire 23 passed through the heating steel tube 22, and insulation is performed. By connecting the other end of the electric wire 23 to the other end of the heat generating steel tube 22 and connecting one end of the heat generating steel tube 22 to the AC power source 24, the insulated wire 23 and the heat generating steel tube 22 are connected in series to generate the current i. As shown in FIG. 7 (b), the insulated electric wire 23 is passed through at least a pair of exothermic steel tubes 22, and the other ends of the insulated electric wires 23 are connected to each other. One end side of each insulated wire 23 is connected to the AC power source 24, and at least both ends of the pair of heat generating steel tubes 22 are connected by welding 5, 6, etc., and a primary current i 1 is passed between the insulated wires 23. Inner surface of sink and heat generating steel pipe 22 And induced skin current heating tubes scheme for channeling main secondary current i2 in connection parts 5, 6 are known.

The snow melting / freezing prevention device in the branch using the skin current heating tube is shown in FIGS. 5A and 5B (Patent Document 1) and shown in FIGS. 6A and 6B (Patent Document). 2) is known.
In FIGS. 5 (a) and 5 (b) showing Patent Document 1, the tongue rail 13 at the rail point of the railway is pointed by sliding on the floor board 11 fixedly mounted on the sleeper 10 by a rolling machine. Is to switch. A heating device is closely attached to both sides of the floor board 11. In this heating device, a plurality of heat generating steel pipes 22 are welded in parallel to the lower surface of a flat heat generating steel plate 21, the lower surface is covered with a heat insulating layer 25, and an insulated wire 23 is passed through the heat generating steel tube 22. Two things are connected by a distance adjusting bracket 26. Then, the insulated wires 23 are sequentially connected in series and connected to the AC power source 24. Then, the heat generated in the heat generating steel tube 22 is conducted to the heat generating steel plate 21 to which the heat generating steel tube 22 is welded, and further to the floor plate 11 that is in close contact with the side surface of the heat generating steel plate 21. For this reason, snow melting and freezing prevention on the upper surface of the floor plate 11 on which the Tongrel 13 slides are performed. In addition, the lower surface of the Tongrel 13 is also heated in contact with the heat generating steel plate 21 and the floor plate 11.

6 (a) and 6 (b) showing Patent Document 2 are different from FIGS. 5 (a) and 5 (b) showing Patent Document 1 in that square-bar-shaped steel rods 27 are welded to both sides of the floor plate 11 at welds 28. A pair of heat generating steel pipes 22 are arranged on the side surface of the welded portion 28, and the pair of heat generating steel pipes 22 are welded to each other at a predetermined interval. 29 is a terminal box.
Japanese Patent Publication No. 63-7431. JP-A-7-288177.

  The skin current heating tube has advantages such as excellent heating efficiency, durability and weather resistance, but the snow melting / freezing prevention device in the branching device described in Patent Documents 1 and 2 is Since both are mounted along the side surface of the floor plate 11, damage due to rail vibration during train passage is severe and lacks durability, and the heat generation of the heat generation steel pipe 22 is caused by the heat generation steel plate 21 and the steel rod 27. Indirect heating, and the thermal efficiency is poor because it is along the narrow side surface of the floor board 11, requires a heating value of 200 to 300 W per floor board, lacks economic efficiency, and further generates a heating value. Due to the large size, there is a problem that the temperature is locally increased, which causes a lack of durability.

  The present invention provides a rail branching device in which a tongrail sliding on the floor plate is arranged inside a basic rail fixedly attached to the floor plate on the sleeper, and the point is moved by moving the tongrail. A plurality of insulated wire insertion holes are formed at predetermined intervals near the upper surface of the Tongrel sliding plate portion of the floor plate, and the insulated wires are inserted into the insulated wire insertion holes, and an AC power source is connected to the tip of the insulated wires. This is a snow melting / freezing prevention device in a branching device, wherein the floor plate functions as a heating steel plate that generates heat by Joule heat.

  According to the first aspect of the present invention, the tongrel that slides on the floor board is disposed inside the basic rail fixedly attached to the floor board on the sleeper, and the tong glail is moved to the point. A plurality of insulated wire insertion holes are formed at predetermined intervals near the upper surface of the Tongrel sliding plate portion of the floor plate, and the insulated wires are inserted into the insulated wire insertion holes. By connecting an AC power supply to the tip of the steel sheet, the floor plate functions as a heat generating steel plate that generates heat by Joule heat, so that the heating efficiency of the skin current heating method in the induction heating method is excellent, durable In addition to having advantages such as excellent weatherability and weather resistance, the floorboard will not be damaged by rail vibrations when passing through the train. It is excellent in thermal efficiency because of the heat. Incidentally, conventionally, a heating value of 200 to 300 W was required per one floorboard, but in the present invention, it is confirmed that 80 to 120 W is sufficiently effective even though it depends on the snowfall strength, and is economical. It has the effect that it is excellent in.

  According to the invention of claim 3, the insulated wire insertion hole is drilled into all floor plates in the range where the tongrel slides from the swing fulcrum of the tongrel to the tip of the tongrel, and the insulated wire is inserted, Since the AC power supply is energized and heated, once it is installed in a wide range where the Tongrel slides, maintenance and management in terms of safety and durability are easy.

In the present invention, on the inside of the basic rail fixedly attached to the floor board on the sleeper, the Tongler sliding on the floor board is arranged, and in the branching device that moves the Tongrel and switches the point, A plurality of insulated wire insertion holes are formed at predetermined intervals near the upper surface of the Tongrel sliding plate portion in the floor plate so that the floor plate functions as a heat generating steel plate that directly generates heat by Joule heat. Insert an insulated wire into the hole and connect an AC power supply to the tip of the insulated wire.
Insulated wire insertion holes are inserted into all floor plates in the range in which the tongrail slides from the swing fulcrum of the tongue rail to the tip of the tongrail, and the AC wire is energized and heated.

A first embodiment of the present invention will be described with reference to FIGS.
In FIG. 4, the railroad track switching branching device is located inside the two basic rails 12 fixedly attached to the sleepers 10 laid at predetermined intervals by the fastening device 14, and these basic rails 12. The tongler 13 that slides on the floor plate 11 while maintaining the interval by the rolling rod 17 and the interval holding rod 18, and the operating rod 16 connected to the rolling rod 17 at the tip of these tongrel 13. It is comprised with the rolling machine 15 which rock | fluctuates by the rocking | fluctuation fulcrum 19 via this, and switches a point.

  In the floor plate 11, a rail mounting plate portion 36 for attaching the basic rail 12 and a tongrel slide plate portion 31 on which the tongrel 13 slides are formed of steel. A plurality of, for example, 12 insulative wire insertion holes 30 having a diameter of 6 mm are formed in parallel at intervals of 20 mm at a position approximately 7 mm below the upper surface of the floor plate 11. In this insulated wire insertion hole 30, two sets of insulated wires 23 are alternately folded and inserted so that the directions of currents next to each other are reversed, and the two wires led out from the insulated wire insertion holes 30 are inserted. An AC power supply 24 is connected to the tip of the insulated wire 23.

  The distance from the sliding surface of the insulated wire insertion hole 30 is preferably as small as possible within the range allowed by the mechanical strength as a floor plate, from the viewpoint of heat generation efficiency, and the distance between the insulated wire insertion holes 30 is Depending on the thickness of the insulated wire 23 as a heater, the temperature distribution of the sliding surface of the floor plate is set as uniform as possible.

  The rail mounting plate portion 36 has an upper portion at one end as a protruding portion 33, and a rail fastening space 34 is formed between the protruding portion 33 and the upper surface of the rail mounting plate portion 36. A fastening spring insertion hole 32 is drilled through in the longitudinal direction below the insulated wire insertion hole 30 in 31.

As shown in FIG. 3, the two floor boards 11 configured in this way are placed on the sleeper 10 with a predetermined interval so that the rail fastening space 34 side faces each other, and each of the four floor boards 11 has four corners. A bolt or the like is inserted into the mounting hole 35 and fixedly attached to the sleeper 10. The basic rails 12 are respectively mounted on the rail mounting plate portions 36 of the floor plates 11, and the fixed leg portions of the basic rails 12 are fitted into the rail fastening space 34 on the inner side and fixed on the outer side by the fastening device 14. .
The two Tongle rails 13 are held at regular intervals by the tip rods 17 and placed on the Tongrel slide plate portion 31 of the floor plate 11, and the tip rods 17 are rolled by the operation rod 16. Connected to the lever 15. As shown in FIG. 3, the pair of tongrels 13 move while sliding on the upper surface of the tongrel sliding plate portion 31 from the position of the solid line to the position of the chain line while maintaining a constant interval.

The installation range 20 of the snow melting / freezing prevention device for inserting and heating the insulated wires 23 into the insulated wire insertion holes 30 of the floor plate 11 is all the floor plates 11 from the swing fulcrum 19 to the tip of the Tongler 13 in FIG. More than that.
In FIG. 2, the AC power supply 24 is connected to the insulated wire 23 in one floor plate 11 for the sake of explanation. However, the insulated wires 23 attached to all the floor plates 11 in the installation range 20 of the snow melting / freezing prevention device are sequentially connected in series. To the AC power supply 24.

The temperature rise in the center of the floor plate of the snow melting / freezing prevention device (hereinafter referred to as the device of the present invention) and the conventional snow melting device (hereinafter referred to as the conventional device) attached with resistance heating along both sides of the floor plate according to the present invention. A test result is demonstrated based on FIG.8 and FIG.9.
Both the device of the present invention and the conventional device show examples using a 200 W power consumption type.
The following facts became clear from these figures. In addition, the measurement point of the test set the first 1 hour as a unit of 10 minutes, and after 1 hour passed until 8 hours passed as 1 hour unit.
(1) In the apparatus of the present invention, the temperature rises to about 20 ° C. in 20 minutes and to about 25 ° C. in 30 minutes, which means that snow is sufficiently melted on the floor board in 20 to 30 minutes.
On the other hand, in the conventional apparatus, it takes 1.5 to 2 hours to rise to 20 to 25 ° C.
For this reason, the device of the present invention exhibits the effect of snow melting and freezing in a shorter time than the conventional device.
(2) In the apparatus of the present invention, the temperature rose to the upper limit of about 35 ° C. in about 1 hour.
On the other hand, in the conventional apparatus, it took about 4 hours to rise to the upper limit of about 35 ° C.
For this reason, the device according to the present invention can achieve a significant power saving as compared with the conventional device by turning off the power when the upper limit is reached to about 35 ° C.

It is a perspective view which shows Example 1 of the snow melting and freezing prevention apparatus in the branching device by this invention. FIG. 2 is a partially cutaway plan view in FIG. 1. It is sectional drawing of Example 1 of the snow melting and freezing prevention apparatus in the branching device by this invention. It is a top view which shows the whole snow melting and freezing prevention apparatus in the branching device by this invention. (A) is a front view for description of Patent Document 1, and (b) is a bottom view in which the heat-generating steel plate in (a) is partially cut away. (A) is the front view for description of patent document 2, (b) is a top view of the heat-generating steel plate in (a). (A) is explanatory drawing of a well-known serial skin current heating tube system, (b) is explanatory drawing of a well-known induction skin current heating tube system. It is comparison explanatory drawing of the test data by this invention apparatus and a conventional apparatus. It is a characteristic diagram based on the data of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Sleeper, 11 ... Floor board, 12 ... Basic rail, 13 ... Tongrel, 14 ... Fastening device, 15 ... Turning machine, 16 ... Moving rod, 17 ... Falling rod, 18 ... Spacing bar, 19 ... Oscillation fulcrum, 20 ... installation range of anti-freezing device, 21 ... exothermic steel plate, 22 ... exothermic steel pipe, 23 ... insulated wire, 24 ... AC power source, 25 ... heat insulation layer, 26 ... spacing adjustment fitting, 27 ... steel rod, 28 DESCRIPTION OF SYMBOLS ... Welding part, 29 ... Terminal box, 30 ... Insulated wire insertion hole, 31 ... Tongrel sliding plate part, 32 ... Fastening spring insertion hole, 33 ... Projection part, 34 ... Rail fastening space, 35 ... Mounting hole, 36 ... Rail mounting plate.

Claims (3)

  In the rail branching device that arranges a tongrel sliding on the floorboard inside the basic rail fixedly attached to the floorboard on the sleeper, and switches the point by moving this tongrail, A plurality of insulated wire insertion holes are drilled at predetermined intervals near the top surface of the tongue rail sliding plate, and the insulated wires are inserted into the insulated wire insertion holes, and an AC power source is connected to the tip of the insulated wire. Thus, the snow melting / freezing preventing device in the branching device is configured such that the floor plate functions as a heat generating steel plate that generates heat by Joule heat.   2. The snow melting / freezing preventing device for a branching device according to claim 1, wherein the insulated wires are alternately folded and inserted into the plurality of insulated wire insertion holes so that the directions of currents adjacent to each other are reversed. .   Insulated wire insertion holes are drilled in all floor plates where the tongrail slides from the swinging fulcrum of the tongue rail to the tip of the tongrail. The snow melting / freezing prevention device for a branching device according to claim 1, wherein

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