JP2007085057A - Snow-melting panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a snow-melting panel which has high snow-melting efficiency, dispenses with large-sized manufacturing equipment, and can reduce the number of man-hours for manufacturing. <P>SOLUTION: This snow-melting panel 1 is equipped with a rectangular radiator plate 2, and a channel forming member 3 which forms a zigzag channel allowing the flow of a heat medium between one side of the radiator plate 2 and the member 3. The member 3 comprises a first nozzle member into which the heat medium flows, a second nozzle member 4b from which the heat medium flows out, a plurality of rows of linear groove members 5 with trapezoidal cross sections, which are arranged between the nozzle members, and a plurality of U-shaped groove members 6 which are connected to ends of the members 5 adjacent to one another. A joint part 7 is fixedly provided in a part for connecting the linear member 5, the first and second nozzle members 4, and the groove member 6; and both short-side-direction ends of the respective member 5 are fixed to the radiator plate 2 throughout their longitudinal lengths. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a snow extinguishing panel installed around a rail laid in a snowy area.

  On railway lines laid in snowy areas, in order to operate the train safely, a snow-dissipating panel is installed around the rails, and the snow accumulated on the snow-dissipating panel (the snow removed and the snow that fell) is removed. Melting with the heat medium (for example, warm water, such as groundwater) which flows the back of a snow panel is performed.

  As this type of snow removal device, for example, the one described in Patent Document 1 is used. This snow-dissipating heatsink includes a groove having a plurality of rows of wide and shallow recesses and a wide and shallow recess that connects each row of the recesses to the lower surface of a thin steel plate (flat plate) whose upper surface is a heat dissipation surface. Joint plates (steel plates) are joined, and pipe connection ports are provided at both ends of a flow path (trapezoidal cross section) formed by continuous wide and shallow recesses and flat plates of this grooved plate, and the periphery of the flat plate and grooved plate An extension is provided on the thin strip that surrounds the groove, a gap is provided between the lower surface of the grooved plate and the laying surface, and a pipe connection port is opened toward the gap. Further, in Patent Document 2, in order to improve the snow melting effect, the radiator plate described in Patent Document 1 is provided with a gradient with respect to the horizontal, and the radiators are arranged in a plurality of rows and a hot water supply pipe is provided. And the snow-melting apparatus which connected the pipe connection port of each radiator to the discharge pipe in parallel is described.

The main part of the snow-removal panel which comprises said snow-removal apparatus is shown in FIG.7 and FIG.8. FIG. 7 is a plan view of a conventional snow extinguishing panel, and FIG. 8 is a cross-sectional view taken along line EE of FIG. The snow extinguishing panel 10 includes a rectangular heat sink 20 having _a long side length L ₀ and a thickness ta, and a flow path forming member 30 having a thickness t _b held on one surface thereof. Yes. The flow path forming member 30 includes nozzle portions 31a and 31b to which a water supply nozzle and a drain nozzle (both are not shown) are respectively mounted, and a flow path 32 formed in a fold shape therebetween. Since the straight portion of the flow path 32 has a trapezoidal shape (bottom width W _d , top width W _c , height h _a ), the contact area between the hot water and the heat radiating plate increases, and snow melting efficiency is improved. It has the advantage of being expensive. (In FIG. 8, the heat sink 20 is shown below, but in reality, the heat sink 20 is installed so that the surface of the heat sink 20 faces upward, so the upper side in the figure is the bottom and the lower side in the figure is It is expressed as the upper side.)

Japanese Patent Publication No. 6-76681 (page 3-4, FIGS. 1 and 4) Japanese Patent Laid-Open No. 11-152701 (page 4, FIG. 2)

Although the above snow-melting panel has high snow melting efficiency, there is a problem that the number of manufacturing steps increases. That is, the above-mentioned snow melting panels, for example, the thickness t _b is a number of times press-molding a steel plate of 1.6 mm, the resulting molded product, for example (member for forming a flow path) thickness t _a is 2.3mm It is manufactured by applying a surface treatment (for example, plating) after welding to a heat radiating plate made of a steel plate. However, since the snow extinguishing panel has a size such that the length L ₀ on the long side is 2,750 mm and the width W ₀ on the short side is 950 mm, for example, a large size is required to manufacture a member forming the flow path. Shaped press machine is required, the equipment cost rises, and the material size is large. Therefore, wrinkles occur along the long side of the molded product after pressing, and the removal process is required. However, there is a problem that it takes time and effort.
Moreover, since it is necessary to weld locations other than an edge part in the state which bonded the molded object to the heat sink, seam welding is used for a welding means. In this case, a large welding distortion occurs at the time of joining, so that a distortion removing process after welding is necessary.

  An object of the present invention is to solve the above-described problems, and to provide a snow-melting panel that has high snow melting efficiency and does not require a large-scale manufacturing facility and can reduce the number of manufacturing steps.

In order to achieve the above object, a snow-melting panel according to the present invention comprises a rectangular heat sink and a flow path forming member that forms a zigzag flow path in which a heat medium flows between one surface of the heat sink. In the snow-melting panel
The flow path forming member includes a first nozzle member into which the heat medium flows, a second nozzle member from which the heat medium flows out, and a plurality of rows of linear groove members having a trapezoidal cross section disposed therebetween. And a plurality of U-shaped groove members to which end portions of adjacent linear groove members are connected, and a joint portion at a connecting portion between the linear member, the first and second nozzle members, and the U-shaped groove member The seam portion is fixed, and each straight groove member is fixed to the heat radiating plate at both ends in the short direction along the entire length in the longitudinal direction.

  In the present invention, the seam portion includes the first nozzle member, the second nozzle member, and / or the U-shaped groove member, the end portion of which extends over the end portion of the linear groove member. It is preferable to be formed by being fixed to the groove member.

  In the present invention, the seam portion includes the first nozzle member, the second nozzle member, and / or the U-shaped groove member in a state where the end portion of the linear groove member rides on the end portion thereof. It may be formed by being fixed to the groove member.

  In the present invention, the fixing between the heat radiating plate and the linear groove member and the fixing between the U-shaped groove member and the linear groove member are preferably performed by arc welding capable of high-speed and low-cost welding work.

  In the present invention, in order to form a normal weld metal, a gap is provided between the linear groove members adjacent to each other, and the gap is preferably in the range of 0.5 to 5 mm, more preferably a gap range. Is 1.0-2.5 mm.

According to the present invention, since the flow path forming member is divided into a plurality of members including a linear groove member having a trapezoidal cross section, each member can be manufactured by, for example, a small press machine, and equipment costs are increased. Is suppressed, and the wrinkle removing step after the pressing step is not necessary. Further, the flow path forming member can be welded to the heat sink by arc welding, and the joining process of each member can be easily automated.
According to the present invention, since the end of each member can be welded in a state where it rides on the end of the adjacent member, the members can be more reliably connected to each other than when the members are simply brought together. Can be joined.
Further, by joining the divided members by arc welding, welding distortion can be suppressed, and the number of man-hours required for strain removal after welding can be reduced. Therefore, according to the present invention, a snow-melting panel having high snow melting efficiency can be manufactured at low cost.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a plan view of a snow-melting panel according to an embodiment of the present invention, FIG. 2 shows a nozzle portion, (a) is a plan view, (b) is a left side view, and (c) is A in (a). -A sectional view, FIG. 3 shows a straight groove member, (a) is a front view, (b) is a plan view, FIG. 4 shows a U-shaped member, (a) is a plan view, and (b) is a left side. FIG. 5C is a cross-sectional view taken along line BB in FIG. 5A, FIG. 5 is a cross-sectional view taken along line CC in FIG. 1, and FIG. 6 is a cross-sectional view taken along line DD in FIG.

  As shown in FIG. 1, the snow extinguishing panel 1 has a flat heat sink 2 (see FIGS. 5 and 6) whose one surface 2 a serves as a snow receiving surface and a zigzag folded shape provided on the back surface 2 b. It is composed of a flow path forming member 3. The heat radiating plate 2 and the flow path forming member 3 are used to efficiently transfer the heat of the heat medium (for example, hot water) flowing inside the flow path 3 to the snow accumulated there through the snow receiving surface. In addition, it is made of a steel material having a high thermal conductivity. (For example, carbon steel with thermal conductivity of about 50 W / m · K)

The flow path forming member 3 is formed in a rectangular shape (length L in the long side direction, width W in the short side direction), and is connected to a first nozzle member 4a to which a nozzle (not shown) through which hot water flows is connected. A second nozzle member 4b to which a nozzle (not shown) through which hot water flows out is connected, and a plurality of rows of linear groove members 5 (5 ₁ ... 5 _n , n: 4 or more extending along the long side direction. And a U-shaped groove member 6 (6 ₁ ... 6 _m , m: an integer of 3 to n−1) communicating with each linear groove member 5. FIG. 1 shows a case where n = 10 and m = 9. Details of each member constituting the flow path forming member 3 are as follows.

As shown in FIG. 2, the first nozzle member 4 (4a) is a rectangular member as viewed from a plane having a length L ₁ , a width W ₁ , and a thickness t, and a nozzle (not shown) is mounted. A hollow frustoconical flange portion 41 having a height h ₁ (inner dimension) and a stepped portion 42 having a length L ₃ connected to the flange portion 41 and having a trapezoidal cross-sectional shape. The stepped portion 42 has a height h ₂ (inner dimension) larger than the height h ₁ so that the end of the linear groove member 5 ₁ (see FIG. 3) can be inserted therein. Since the second nozzle member 4b has the same shape and dimensions as the first nozzle member 4a, illustration is omitted.

As shown in FIG. 3, the linear groove member 5 (5 ₁ ... 5 ₁₀ ) has a trapezoidal cross section (bottom width W _b , upper side) in order to increase the contact area between the hot water flowing inside and the heat sink. is formed to a width W _a) of a leg portion 50 over both sides of the full length (L _2), having a width W ₁ of the same nozzle member, a belt-shaped member having a thickness of t. As shown in FIG. 6 (a), each linear groove member _5n is preferably formed with a gap RG between the end face of each leg 50 and the end face of the leg of the adjacent linear groove member (non-contacting). ).

Figure 4 U-groove member 6 as shown in ₍₆ 1 ... _{6 9)} has a semi-circular portion 61 of a height _{h 1} (inner dimension) consists stepped portion 62 of height _{h 2} (inner dimension) , Having the same length L ₁ as the nozzle member 4 (see FIG. 2) and a width W ₂ that is approximately twice its width W ₁ . As shown in FIG. 5A, each U-shaped groove member 6 is installed such that the end portion of the linear groove member 5 is inserted into the stepped portion 62. These U-groove member 6 is juxtaposed to the short side of both linear groove member 5, the nozzle member 4a, U-shaped groove member 6 ₁ ... 6 ₄ installed between 4b and the linear groove member 5 Adjacent linear groove members communicate with each other by U-shaped groove members 6 ₅ ... 6 ₉ installed on the other short side to form a single flow path (see FIG. 1).

Said snow-dissipating panel 1 can be manufactured by the following process, for example. First, the fabricating radiating plate 2 by cutting a commercially available steel sheet into a predetermined size by machining a steel plate (for example, cutting after press molding into a predetermined size), the nozzle member 4a, 4b, the linear groove member 5 ₁ ... 5 ₁₀ and U-shaped groove members 6 ₁ ... 6 ₉ are manufactured. These members are placed at predetermined positions on one surface of the heat radiating plate 2, and then joined to the heat radiating plate 2 by a technique such as arc welding, and the joints of the linear groove members 5 ₁ , 5 ₁₀ and the nozzle members 4a, 4b. The joints 7 of the portions 7a and 7b and the straight groove member 5 and the U-shaped groove member 6 are also joined. There are various types of arc welding, but the welding wire is continuously fed, the arc generated between the welding wire and the base metal is maintained, welding proceeds, and the welding torch flows out from the nozzle at the tip of the welding torch. A MAG (Metal Active Gas) welding in which the welding metal is shielded from the atmosphere by a shielding gas (carbon dioxide gas and / or argon gas) is preferable. This MAG welding has the advantage that the welding speed is high, the welding efficiency is high, and the penetration is deep, so that the groove cross-sectional area of the base material may be small, the welding position is not limited, and control is possible with a visible arc. This is advantageous for the present invention. Further, as other arc welding, for example, TIG (Tungsten Inert Gas) welding and MIG (Metal Inert Gas) welding can be used. And after mounting | wearing said panel with the components for water supply / drainage, what is necessary is just to perform a rust prevention process (for example, galvanization).

  When arc welding the seam portion 7 between the U-shaped groove member 6 and the linear groove member 5 (the same applies to the seam portions 7a and 7b between the nozzle member 4 and the linear groove member 5), as shown in FIG. In the case where the end portion of the linear groove member 5 is inserted into the stepped portion 62 of the U-shaped groove member 6 (a state where the stepped portion 62 rides on the end portion of the linear groove member 5), it is preferable as a welding condition. Since the fillet welding is performed, poor welding is less likely to occur. As a result, the warm water is prevented from leaking from the joint portion 7. In contrast, when the end of the U-shaped groove member 6 and the end of the linear groove member 5 are opposed to each other as shown in FIG. 5B, the processing of the end of the U-shaped groove member 6 is simple. become. However, on the other hand, since the end portions of the members are joined by butt welding, welding becomes unstable. As a result, there is a possibility of causing leakage of hot water from the joint portion 7, and therefore it is desirable to avoid it in the present invention. In addition, also when arc welding the joint part 7 of the nozzle member 4 and the linear groove member 5, the structure similar to Fig.5 (a) is preferable. In the present invention, the joining of the nozzle member 4 and / or the U-shaped groove member 6 and the linear groove member 5 is not limited to the structure shown in FIG. A step portion may be formed, and the stepped portion may ride on the end of the nozzle member 4 and / or the U-shaped groove member 6. (See Figure 5 (c))

  When arc welding (for example, mag welding) of the linear groove member 5 to the heat sink, the groove shape of the base material (linear groove member 5) is important in order to form a normal weld metal. As shown, it is preferable to provide a gap RG between the leg portions 50 of the adjacent linear groove members 5. However, if the gap RG is too narrow, the adjacent legs 50 of the linear groove member 5 will be insufficiently melted and welding distortion will be excessive. On the other hand, if the gap RG is too wide, the adjacent legs 50 will not be melted by one welding. Since welding twice is required, RG is preferably set in the range of 0.5 to 5 mm, and more preferably in the range of 1.0 to 2.5 mm. As shown in FIG. 6B, when RG = 0, the leg portion 50 is likely to be insufficiently melted.

Having dimensions of L2,750mm × W950mm × _t a 2.3mm, it was excised radiating plate 2 of unit weight 54kg from commercially available steel. Moreover, the material cut out from a commercially available steel (thickness T1.6Mm) was molded by a small _press, L 1 63mm × _W 1 having a size of 42mm, the unit weight 0.035kg nozzle member 4a, a 4b 19 U-shaped groove members 6 having a weight of 0.07 kg and a size of W ₂ 86 mm × L ₁ 63 mm were manufactured. Furthermore, the raw material cut out from the steel plate similar to the above is processed by a forming roll, and 20 straight groove members 5 having a single weight of 1.5 kg and a dimension of W ₁ 42.5 mm × L ₂ 2,500 mm are manufactured. did. After placing the linear groove member 5 on the surface of the heat sink 2 and aligning it at a predetermined position with a positioning member (not shown), the linear groove member 5 is temporarily fixed to the heat sink 2 by, for example, spot welding, The end face in the short direction was arc welded (mag welding method). By overlapping the stepped portion 42 of the nozzle portions 4a and 4b and the stepped portion 62 of the U-shaped groove member 6 on the end of the linear groove member 5, and then welding the joint portions 7a, 7b and 7 of these members by mag welding After forming 20 channels on the back surface of the heat radiating plate 2, surface treatment (zinc plating) was performed. In this way, the flow path forming member is divided to produce a snow extinguishing panel, which eliminates the need for a wrinkle removing process after press molding as compared to the conventional manufacturing method shown in the comparative example, and also eliminates the welding strain removal process. Simplified. Moreover, since the joint part joined by the arc welding the part which the edge part of each member got over, the welding defect did not arise, and defects, such as a leak, did not generate | occur | produce.

(Comparative example)
Press forming a steel plate (forming two rows of grooves with a single press, forming 10 times in total), forming a U-shaped groove, then forming a nozzle, and then passing the compact between multiple rollers A wrinkle (distortion in the thickness direction of about 30 to 50 mm) generated in the longitudinal direction in the pressing process is removed, and a single member having a single unit weight of 36 kg is temporarily fixed to a heat radiating plate. The short side was seam-welded, the welding distortion was removed, and then surface treatment (zinc plating) was performed to produce a snow-fusing panel having substantially the same dimensions as described above.

It is a top view of the snow-melting panel concerning embodiment of this invention. A nozzle member is shown, (a) is a top view, (b) is a left view, (c) is the sectional view on the AA line of (a). A linear groove member is shown, (a) is a front view, (b) is a top view. The U-shaped member is shown, (a) is a plan view, (b) is a left side view, and (c) is a sectional view taken along line BB of (a). It is the CC sectional view taken on the line of FIG. 1, (a) is a figure which shows a preferable state, (b) is a figure which shows a reference example. It is the DD sectional view taken on the line of FIG. 1, (a) is a figure which shows a preferable state, (b) is a figure which shows a reference example. It is a top view of the conventional snow extinguishing panel. It is the EE sectional view taken on the line of FIG.

Explanation of symbols

1: Snow-absorbing panel, 2: Heat radiating plate, 3: Flow path forming member, 4, 4a, 4b: Nozzle member, 5, 5 ₁ ... 5 ₁₀ : Linear groove member, 6, 6 ₁ ... 6 ₉ : U-shaped groove Member, 7, 7a, 7b: joint

Claims (5)

In the snow-melting panel provided with a rectangular heat sink and a flow path forming member that forms a zigzag flow path in which the heat medium flows between one surface of the heat sink,
The flow path forming member includes a first nozzle member into which the heat medium flows, a second nozzle member from which the heat medium flows out, and a plurality of rows of linear groove members having a trapezoidal cross section disposed therebetween. And a plurality of U-shaped groove members to which end portions of adjacent linear groove members are connected, and a joint portion at a connecting portion between the linear member, the first and second nozzle members, and the U-shaped groove member The snow joint panel is characterized in that the seam portion is fixed, and the both ends of each straight groove member are fixed to the heat radiating plate over the entire length in the longitudinal direction. The joint portion is fixed to the linear groove member in a state where the first nozzle member, the second nozzle member and / or the U-shaped groove member rides on the end portion of the linear groove member. The snow extinguishing panel according to claim 1, wherein the snow extinguishing panel is formed. The seam portion is fixed to the linear groove member with the first nozzle member, the second nozzle member, and / or the U-shaped groove member on the end of the linear groove member. The snow extinguishing panel according to claim 1, wherein the snow extinguishing panel is formed. 4. The snow extinguishing panel according to claim 1, wherein the heat radiation plate and the linear groove member and the U-shaped groove member and the linear groove member are fixed by arc welding. . 5. The snow extinguishing panel according to claim 1, wherein a gap is provided between the adjacent linear groove members, and the gap is in a range of 0.5 to 5 mm.

Images