JP2011214226A - Antifreezing device of laid object for railroad - Google Patents

Abstract

PROBLEM TO BE SOLVED: To emit a jet of hot air toward the surface of a laid object for a railroad laid on the ground while keeping the hot air in a high-temperature state.SOLUTION: This antifreezing device of the laid object for the railroad prevents the freezing of a point switching device 31 by emitting the jet of hot air toward the surface of the point switching device 31 (laid object for the railroad). The antifreezing device includes: a hot air generation unit 3 (hot air generation source) for generating the hot air; hot air supply passages 25 (inner and outer double pipes) which comprise an inner metal pipe 23 introducing the hot air from an inlet portion 27 (one end) and emitting the jet of hot air toward the surface of the point switching device 31 from an outlet portion 29 (the other end), and an outer pipe 25 disposed with an annular space 24 between outside the inner pipe 23; and a clip 43 (supporting member) which is formed by bending an elastic metal wire rod, disposed in the annular space 24, and brought into contact with an outer peripheral surface of the inner pipe 23 and the inner peripheral surface of the outer pipe 25 in a plurality of positions circumferentially different from one another so as to position and support the inner pipe 23 in the inside central portion of the outer pipe 25.

Description

  The present invention relates to an anti-freezing device for a railway laying object that prevents hot blasting of a railway laying object by blowing hot air toward the surface of the railway laying object through a hot air supply path, and in particular, heat insulation of the hot air supply path. It relates to technology for ensuring performance.

  In the anti-freezing device for railway laying articles described in Patent Document 1, the laying thing is heated by blowing hot air toward the surface of the railway laying article (hereinafter referred to as laying article) through the hot air supply path. In addition, the laying structure is prevented from freezing. Thus, it is possible to prevent the laying object from being hindered by freezing.

JP-A-7-102501

However, in the thing of patent document 1, the temperature fall to the hot-air jet outlet is large by the heat radiation from the surface of the hot-air supply path, and a sufficient freezing prevention effect cannot be obtained.
The present invention has been made in view of the conventional problems as described above, and provides an anti-freezing device for railway laying objects capable of blowing hot air toward the surface of the laying object while maintaining a high temperature state. The purpose is to provide.

For this reason, the present invention
A hot air source that generates hot air;
A metal inner pipe that introduces the hot air from one end and jets the hot air from the other end toward the surface of the laying object, and an outer pipe disposed outside the inner pipe with an annular space therebetween, An inner / outer double pipe with
By bending an elastic metal wire, disposed in the annular space, and contacting the outer peripheral surface of the inner tube and the inner peripheral surface of the outer tube at a plurality of different positions in the circumferential direction, A support member for positioning and supporting the inner tube at the inner central portion of the outer tube;
Constructed including.

According to the above configuration, a heat insulating air layer can be formed between the inner tube and the outer tube by positioning and supporting the inner tube at the inner central portion of the outer tube by the support member. Further, since the support member is made of a wire, the contact area between the support member and the inner tube and the outer tube can be sufficiently reduced.
As described above, since heat transfer from the inner pipe to the outer pipe can be suppressed as much as possible, the temperature drop of the hot air from the hot air generation source to the hot air outlet of the hot air supply path can be suppressed, and the anti-freezing efficiency of the laying structure can be improved. Can be increased.

It is a figure which shows the freezing prevention apparatus of the laying article for railways concerning embodiment of this invention. It is a longitudinal cross-sectional view of the hot air supply path of FIG. It is a cross-sectional view of the hot air supply path of FIG. (A) is a figure which shows the state which supported the edge part of the part which the clip concerning embodiment of this invention supported, and (b) is a figure which shows the state which supported the intermediate part of parts. It is a longitudinal cross-sectional view in an assumed double tube structure. It is a figure which shows the modification of the internal / external double tube which concerns on embodiment of this invention.

Hereinafter, embodiments of the present invention will be described.
FIG. 1 shows an anti-freezing device (hereinafter referred to as an anti-freezing device) for railway laying objects according to an embodiment of the present invention.
As shown in FIG. 1, the antifreezing device 1 includes a hot air generating unit (hot air generating source) 3 and a point switch 31 (which is laid on the ground via hot air generated by the hot air generating unit 3). A hot air supply path 5 that is ejected toward the surface of the railway laying object).

The hot air generation unit 3 includes a blower 7, a heater unit 9, and a control panel 11.
A blower opening of the blower 7 is connected to the heater unit 9 via a hose 15. The blower 7 is driven by being supplied with electric power, and supplies air to the heater unit 9 through the hose 15.
The heater portion 9 includes a cartridge heater 9a at the center portion of the cylindrical member that is bulged and formed with an inlet connected to the outlet of the hose 15. The cartridge heater 9a is supplied with electric power to generate heat, heats the air supplied from the hose 15, and generates hot air toward the downstream side.

The control panel 11 is configured to supply power to the blower 7 via the power line 13 and drive the blower 7. The control panel 11 can control the amount of air supplied from the blower 7 to the heater unit 9 by controlling the power supplied to the blower 7.
Further, the control panel 11 is configured to supply power to the cartridge heater 9a via the power supply line 17 so that the cartridge heater 9a generates heat. The control panel 11 can control the temperature of hot air generated in the heater unit 9 by controlling the power supplied to the cartridge heater 9a.

The hot air generating unit 3 is installed away from the rails 21 and 21 laid on the railroad bed 19 on the ground so that it can be safely operated and inspected even during operation of the railroad. .
The hot air supply path 5 includes a metal inner tube 23 and a metal outer tube 25 disposed outside the inner tube 23 with an annular space 24 therebetween.

  An inlet portion 27 of the inner tube 23 is connected to the heater unit 9, and an outlet portion 29 of the inner tube 23 is opened upward toward the surface of the point changer 31 disposed in the space S. For this reason, the hot air generated in the heater section 9 is introduced from the inlet section 27, passes through the inner pipe 23, and is ejected from the outlet section 29 toward the surface of the point changer 31. Thus, by heating the point switch 31 with hot air, the ice and snow adhering to the point switch 31 are melted, and the operation of the point switch 31 is prevented from being hindered by freezing.

A strainer 33 is disposed so as to cover the outlet 29 of the inner tube 23. The strainer 33 prevents raindrops or the like in the outside air from entering the inner tube 23 from the outlet portion 29.
The inner tube 23 and the outer tube 25 are each configured by being cut and divided into a plurality of parts 23a and 25a in the axial direction. Therefore, as shown in FIG. 2, the hot air supply path 5 includes a plurality of annular members 35 that connect the axially adjacent parts 25 a and 25 a and the axially adjacent parts 23 a and 23 a to each other. And a plurality of joint pipes 37 to be connected.

  The annular member 35 has an inner peripheral flange surface 35a, and a peripheral side surface 35b that extends to the radially outer side in a continuous manner with the inner peripheral flange surface 35a. Here, the inner peripheral flange surface 35a is bonded to the outer peripheral surface of the edge of the part 25a with an adhesive or the like. Further, the peripheral side surfaces 35b, 35b of the adjacent annular members 35, 35 are fastened in the axial direction by bolts 39 and nuts 41 with the gasket member 38 interposed therebetween.

The joint pipe 37 is formed in a hollow shape, and is fitted into the inner circumferential space of the parts 23a and 23a adjacent in the axial direction, and is fixed to the parts 23a and 23a. Therefore, the hot air passes through the inner peripheral space of the joint pipe 37 and is guided from one inner peripheral space of the parts 23a and 23a adjacent in the axial direction to the other inner peripheral space.
The hot air supply path 5 includes a straight portion 5a extending linearly and a curved portion 5b that bends. Here, the straight part 5a can be cut into a plurality of parts 23a, 25a to an arbitrary length according to the situation of the site where the freeze prevention device 1 is installed.

  A clip 43 is disposed in the annular space 24. The clip 43 is formed by bending an elastic metal wire. As shown in FIG. 3, the clip 43 has contact portions 43 a to 43 d that are in contact with the outer peripheral surface of the inner tube 23, and contact portions 43 e to 43 g that are in contact with the inner peripheral surface of the outer tube 25. The contact portions 43a to 43g are arranged in this order from the one end side of the clip 43 in the order of the contact portions 43a, 43e, 43b, 43f, 43c, 43g, and 43d. In this way, the clip 43 contacts the outer peripheral surface of the inner tube 23 and the inner peripheral surface of the outer tube 25 at least at three locations in the circumferential direction at substantially equal intervals. The tube 23 is positioned and supported. Here, the clip 43 is configured such that the contact area between the inner tube 23 and the outer tube 25 is as small as possible within a range in which the inner tube 23 can be positioned and supported in the inner circumferential space of the outer tube 25.

  The clip 43 can support the ends of the parts 23a and 25a as shown in FIG. 4A, and can also support the intermediate portion as shown in FIG. 4B. When the clip 43 supports the intermediate portion, after the clip 43 is mounted on the intermediate portion of the part 23a, the clip 43 is elastically deformed to fit in the inner peripheral space of the part 25a, and the part 23a is moved together with the clip 43. It is good to insert in the inner peripheral space of the parts 25a.

The freeze prevention device 1 includes a thermocouple 45, a thermocouple 47, and an outside air temperature sensor 49 as temperature detection sensors.
The thermocouple 45 has a hot contact point disposed adjacent to the cartridge heater 9 a of the heater unit 9, and is connected to the control panel 11 via the compensation lead wire 51. Thereby, the control panel 11 can detect the temperature of the hot air in the heater unit 9. Therefore, the control panel 11 can perform feedback control of the temperature of the hot air in the heater unit 9 by controlling the power supplied to the cartridge heater 9 a based on the detected value of the temperature of the hot air in the heater unit 9.

  The thermocouple 47 is connected to the control panel 11 via a compensating lead wire 53 whose hot junction is disposed adjacent to the outlet 29 of the inner tube 23 and covered with glass. As a result, the control panel 11 can detect the temperature of the hot air at the outlet 29 of the inner tube 23. Therefore, the control panel 11 can confirm that hot air is ejected from the outlet portion 29 of the inner tube 23 based on the detected value of the temperature of the hot air at the outlet portion 29 of the inner tube 23.

Here, the compensation lead wire 53 connects the thermocouple 47 and the control panel 11 through the annular space 24. In this way, the space for the freeze prevention device 1 is saved by effectively using the annular space 24 as a space for arranging the compensating conductor 53.
Further, a hooking portion 55 extends from the clip 43 toward the outer tube 25 side, and the compensating conductor 53 is disposed in the annular space 24 while being hooked on the hooking portion 55. Here, it is possible to easily dispose the compensating conductor 53 in the annular space 24 by simply fitting the part 23 a together with the clip 43 into the inner circumferential space of the part 25 a while the hook 55 is hooked on the compensating conductor 53. Furthermore, since the compensating lead wire 53 is reliably disposed outside the clip 43, it is separated from the inner tube 23 that easily rises in temperature by the supply of hot air, so that overheating is suppressed.

For simplicity, the compensating conductor 53 may be supported along the lower end of the inner peripheral surface of the outer tube 25 without providing the hook portion 55.
The outside air temperature sensor 49 is configured to detect the outside air temperature and input a detection signal to the control panel 11. For this reason, the control panel 11 can predict the occurrence of freezing of the point changer 31 based on the detected value of the outside air temperature, and can perform control such that hot air is supplied only when freezing is predicted. Thus, power saving of the freeze prevention device 1 is achieved.

Hereinafter, the operation and effect of the clip 43 of the present embodiment will be described.
Suppose that the double-pipe structure has the configuration shown in FIG. In the double tube structure of FIG. 5, the outer peripheral surface of the edge of each part 101 a constituting the inner tube 101 and the inner peripheral flange surface 105 a of the annular member 105 are welded. Moreover, the edge of each part 103a which comprises the outer tube | pipe 103, and the surrounding side surface 105c of the annular member 105 are welded. As a result, the inner tube 101 is positioned and supported at the inner central portion of the outer tube 103.

Further, in the double pipe structure of FIG. 5, the peripheral side surfaces 105 b and 105 b of the adjacent annular members 105 and 105 are fastened to each other in the axial direction by bolts 107 and nuts 109 via the gasket member 106, thereby 101a and parts 103a and 103a are connected to each other.
Here, the longer the interval between the fastening portions of the annular members 105, 105, the easier the inner tube 101 bends and comes into contact with the outer tube 103, and the heat of hot air flows from the inner tube 101 to the outer tube 103 via the contact portion. It is transmitted in large quantities. For this reason, in the double-pipe structure of FIG. 5, the space | interval of the fastening location of the annular members 105 and 105 is narrowed, The number of the fastening locations of the annular members 105 and 105, ie, the number of arrangement | positioning of the annular member 105, must be increased. No longer get.

However, even in this case, the number of the annular members 105 is increased, and the annular member 105 is made of a metal plate having a large thickness to ensure the strength. A large amount is transmitted to the outer tube 103 via the annular member 105. Therefore, the double pipe structure of FIG. 5 cannot ensure sufficient heat insulation performance.
On the other hand, in the clip 43 of the present embodiment, the contact area between the inner tube 23 and the outer tube 25 is as small as possible within a range in which the inner tube 23 can be positioned and supported at the center of the inner circumferential space of the outer tube 25. It is configured as follows. For this reason, the heat of the hot air is suppressed from being transmitted from the inner tube 23 to the outer tube 25 via the clip 43. Thereby, the heat insulation performance between the hot air in the hot air supply path 5 and the outside air can be sufficiently ensured.

Further, since the part 23a can be supported by the part 25a via the clip 43, it is not necessary to weld or bond the clip 43 to the parts 23a and 25a. Therefore, the part 23a can be easily supported by the part 25a, and the cost is low.
Furthermore, since the clip 43 can also support the intermediate part of the parts 23a and 25a in the axial direction, the bending of the part 23a can be suppressed at the intermediate part. Thereby, since the length of the axial direction of parts 23a and 25a can be enlarged, the fastening location of the annular members 35 and 35 can be decreased. Therefore, the labor for fastening the annular members 35 adjacent to each other in the axial direction can be reduced.

  In the present invention, the annular members 105 and 105 of FIG. 5 may be used instead of the annular members 35 and 35. In this case, the length of the parts 23a and 25a in the axial direction can be increased by the clip 43. In addition, the fastening points of the annular members 105 and 105 can be reduced. Thereby, the amount of heat transmitted from the inner tube 23 to the outer tube 25 via the annular member 105 can be reduced, and the heat insulation performance between the hot air in the hot air supply path 5 and the outside air can be ensured.

The present invention is not limited to the above description, and as shown in FIGS. 6A and 6B, the outlet portion 29 of the inner tube 23 is opened laterally or downwardly toward the surface of the point changer 31, respectively. Also good.
Further, the clip 43 may be configured to contact the inner peripheral surface of the outer tube 25 at both ends in the radial direction of the outer tube 25, that is, at two points.

1 Anti-freezing device for railway construction 3 Hot air generating unit (hot air generating source)
5 Hot air supply path (inner and outer double pipe)
23 Inner pipe 24 Annular space 25 Outer pipe 27 Entrance (one end)
29 Exit (other end)
31 point changer (railway laying equipment)
35 Ring member (joint member)
35a Inner peripheral flange surface 35b Peripheral side surface 37 Joint pipe (joint member)
38 Gasket member 43 Clip (support member)

Claims (4)

An anti-freezing device for a railway laying object that blows hot air toward the surface of the railway laying object laid on the ground and prevents the laying object from freezing,
A hot air source that generates hot air;
A metal inner pipe that introduces the hot air from one end and ejects the hot air from the other end toward the surface of the laying object; and an outer pipe disposed outside the inner pipe with an annular space therebetween An inner / outer double pipe with
By bending an elastic metal wire, disposed in the annular space, and contacting the outer peripheral surface of the inner tube and the inner peripheral surface of the outer tube at a plurality of different positions in the circumferential direction, A support member for positioning and supporting the inner tube at the inner central portion of the outer tube;
An anti-freezing device for railway laying structures comprising   2. The railway laying structure according to claim 1, wherein the inner and outer double pipes are divided into a plurality of parts in the axial direction, and further include a plurality of joint members that connect the divided inner and outer double pipes. Freezing prevention device. The joint member is
The inner peripheral flange surfaces are bonded to the outer peripheral surface of the edge of the adjacent outer pipe, and the peripheral side surfaces extending radially outwardly connected to the inner peripheral flange surface are fastened in the axial direction with a gasket member interposed therebetween. A pair of annular members;
A joint pipe that is fitted and fixed to each of the adjacent inner pipes;
The anti-freezing device for railway laying objects according to claim 2, comprising:   4. The support member according to claim 1, wherein the support member supports and supports the outer peripheral surface of the inner tube and the inner peripheral surface of the outer tube at three locations at substantially equal intervals in the circumferential direction. Freezing prevention device for railway laying structures.

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