JP3002094U - Adhesive rail Insulation rail type for insulation seams - Google Patents

Abstract

(57) [Summary] [Purpose] Insulation rail type for adhesive rail insulation seams that is stable even under repeated load and withstands long-term use. [Structure] Heat distortion temperature 220 to 270 ° C. in which vinyl ester consisting of novolac type glycidyl ether and unsaturated monobasic acid is blended with styrene monomer as a polymerizable monomer.
Insulating rail type for adhesive rail seams, which consists of plates in which a vinyl cloth resin and a glass chopped strand layer are impregnated with the above vinyl ester resin and laminated alternately and cured.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulating rail type for adhesive rail insulating joints in railways.

[0002]

[Prior art]

 The rail insulation part of the rail is an important part that insulates the signals sent to the rails that are inevitable for safe driving of trains, trains, and other electrical signals for vehicle operation control. is there.

A normal rail seam has a structure in which rails to be spliced and end portions of the rails are brought into contact with each other, sandwiched between two iron seam plates, and fixed by fastening bolts. On the other hand, the insulating seam is made by inserting a rail type 5 made of an insulating material having a shape similar to the rail cross section between the rails 11 and 12 to be joined as shown in FIG. An insulating plate 3 is also provided between the rail 1 and the seam plate 2 made of iron, and fixed with fastening bolts 4 to electrically insulate the rails. Poor insulation at the insulation seam causes signal failure and other causes, and the damage caused by this is extremely large.

Conventional insulation seams are made at the rail laying site. On the other hand, the end surfaces of both rails to be joined are the rails to be joined and the insulating material with a rail cross-sectional shape sandwiched between the rails (hereinafter referred to as “insulating rail type”). There is an adhesive rail insulation seam glued and fixed to. The present invention relates to an insulating rail type of this adhesive type rail insulating joint.

The insulation rail type used in the conventional adhesive rail insulation joint is formed by laminating a glass cloth with a prepreg impregnated with a liquid epoxy resin having a heat deformation temperature of 70 to 75 ° C., and a pressure of 0.5 to 0. A plate obtained by heating and pressurizing at a temperature of 90 to 95 ° C. for 30 to 50 minutes at a pressure of 0.8 Kg / cm ² is cut into a cross-sectional shape of the rail, and both sides in contact with the rail are sanded, followed by thermosetting. Apply a resin primer and insert it into the gap between the rails and the rails, usually 5.2 to 5.5 mm. Next, according to both rules of both rails of the seam portion, an insulating plate 3 made of a prepreg impregnated with a thermosetting resin is brought into contact with the aggregate such as glass cloth, and this is sandwiched between the seam plates 2 and fastened. Assemble the insulation seam by tightening bolt 4 until the specified torque is reached.

The assembled insulation seam is put in a heating furnace at a temperature of 270 ° C. and heated for 2 to 3 hours to cure the applied thermosetting resin to cure the insulation rail type 5 and the rails 11 and 12. Adhesive unite. At the same time, the insulating plate 3 is also cured. After curing the resin, it is naturally cooled for about 4 hours to obtain an adhesive rail insulation joint. The length of the adhesive rail insulating joint is usually 6000 mm.

[0007]

[Problems to be solved by the device]

 Adhesive rail insulation seams are manufactured in this way, but the adhesive resin applied to both sides of the insulation rail type and the uncured resin impregnated in the insulation plate are completely removed. It is housed in a furnace with an ambient temperature of 270 ° C. for hardening. At this time, the insulating rail type is composed of a glass fiber layer impregnated with an epoxy resin having a heat distortion temperature of 70 to 75 ° C. Therefore, the uncured resin forming the insulating plate cannot withstand the high curing reaction temperature of 170 to 190 ° C., which may cause thermal deterioration, or may be isolated rail type after the natural cooling after the reaction is completed. Cracks may occur in the cross section, resulting in defective products.

In addition, when there are fine cracks that cannot be seen in the cross section and are laid on a railway, the insulation rail type head is created by the wheel load applied when the railway vehicle passes through the adhesive rail insulation joint. The part may be damaged or missing.

Further, since the gap between the rails 11 and 12 is adhesively fixed through the insulating rail type 5, as shown in FIG. Elongation 8 may occur and the thermally deteriorated insulation rail shape may be lost, which increases the number of maintenance and inspection steps. In addition, the above-mentioned adhesive insulation seam, which is more expensive than the conventional field assembly insulation seam. It is a big problem that the insulation rail type makes it unusable.

The present invention is intended to solve these problems and to provide an insulating rail type for adhesive type rail insulating seams that is safe and withstands long-term use.

[0011]

[Means for Solving the Problems]

 The present invention relates to a vinyl ester resin having a heat distortion temperature of 220 to 270 ° C. obtained by blending styrene as a polymerizable monomer with a vinyl ester consisting of a novolac type glycidyl ether and an unsaturated monobasic acid, a vinyl ester resin, and a glass cloth layer. Insulation rail type for adhesive rail insulation seams, consisting of plates that are impregnated with glass chopped strand layers, alternately laminated and cured.

FIG. 2 is a lateral view of a conventional insulating seam, in which a rail-shaped insulating material 5 is sandwiched between the rails 11 and 12 and extends over both rails 11 and 12, and FIG. As shown in the cross-section, the figure shows the joint plate 2 abutting on both sides of the rail via the insulating plates 3 and tightened with bolts 4. These are all assembled at the rail laying site.

FIG. 1 shows the lateral surface of the adhesive rail seam, in which a rail-shaped insulating material 5 is integrally bonded to the rails 11, 12 by means of an adhesive layer 6.

The insulating rail type of the present invention comprises a glass fiber impregnated with a novolac type vinyl ester resin having a heat distortion temperature of 220 to 270 ° C., laminated several layers, and heated and pressure-cured to form a plate. -It is cut out into a le shape. Specific examples of the vinyl ester resin having a heat distortion temperature of 220 to 270 ° C. include styrene and a curing agent as a polymerizable monomer of a vinyl ester composed of novolac type glycidyl ether and unsaturated monobasic acid such as (meth) acrylic acid. Those containing the above are preferably used. Glass cloth and glass chopped strands are impregnated with this resin, and several layers, preferably 6 to 7 layers of each are alternately laminated, and the pressure is 0.5 to 0.8 Kg / cm ² , the temperature is 130 to 150 ° C., and the time is 10 hours. After pressurizing for 10 to 50 minutes and heat-molding, a plate having a thickness of about 5 mm is obtained, and further after-cured at 110 to 130 ° C. for 3 to 6 hours. The plate having the rail cross section cut out from this plate is the insulating rail type of the present invention.

Railroad rails have an insulation resistance due to wear resistance against friction caused by the passage of wheels of a vehicle and elongation 8 of the rail end portion caused by the wheel weight when the wheels pass as shown in FIG. -In order to prevent contact damage to the head of the rail, the head is inclined by 2 to 3 ° along the length of the rail to form a trapezoidal shape, and the damage is caused by extension 8 of the rail. Can be prevented.

The insulation rail type of the present invention does not deteriorate by heat even when exposed to a temperature of 170 to 190 ° C. for curing the insulation plate after the adhesive rail insulation seam is assembled. Also, it does not generate cracks. The rail using the adhesive type insulation seam equipped with the insulation rail type of the present invention withstands the wheel load when the railway vehicle is passing, and the insulation rail type has no damage such as breakage and can be used for a long time. Withstands use and contributes to safe operation of trains and trains.

[0017]

【Example】

Both vertical and horizontal thickness 1155 tex, vertical number 6.5 / 25 mm, horizontal 6/25 mm glass fiber cloth and a glass chopped strand mat layer with a weight of 450 g / m ² laminated at random with glass fiber, A novolak type vinyl ester in which vinyl ester consisting of novolac type glycidyl ether and unsaturated monobasic acid is mixed with styrene as a polymerizable monomer and methyl ethyl ketone peroxide (MEKPO) as a curing agent and cobalt naphthenate (cobalt N). After sufficiently impregnating the resin, 7 layers of glass chopped strand mats and 6 layers of glass fiber cloth were alternately laminated, and heated for 5 minutes at a molding pressure of 0.6 Kg / cm ² and a temperature of 140 ° C. for 5 mm. A plate having a thickness was obtained. After this was subjected to after curing at 120 ° C. for 5 hours, it was cut into an insulating rail form.

The cleavage strength of this insulating rail type is room temperature: 210 Kgf / mm ² , 175 ° C .: 170 Kgf / mm ² , and the conventional product room temperature: 240 Kgf / mm ² , 175 ° C .: 23 Kgf / mm ² At room temperature: 175 ° C, the strength retention rate is about 10%, while the strength retention rate is 81%. It is understood that what is important in the insulating rail type is the physical properties at high temperature, especially the cleavage strength, and in this respect the present invention is very excellent. The heat distortion temperature is 220 to 270 ° C, and the weight change in the gear-oven 200 ° C furnace is -minus 1.8% at 500 hours and minus 3% at 1000 hours. Met.

[Brief description of drawings]

FIG. 1 is a side view of the adhesive rail insulation seam of the present invention.

FIG. 2 is a lateral view of a conventional insulating joint portion.

FIG. 3 is a cross-sectional view of an insulating seam portion.

FIG. 4 is a side view showing the elongation of the rail.

[Explanation of symbols]

 1 rail 2 rail joint plate 3 insulating plate 4 rail fastening bolt 5 insulating rail type 6 adhesive surface 7 gradient 8 rail expansion

Claims (2)

[Scope of utility model registration request] 1. A glass cloth layer and a glass chopped strand of a vinyl ester resin having a heat distortion temperature of 220 to 270 ° C., which is a vinyl ester composed of novolac type glycidyl ether and unsaturated monobasic acid and styrene as a polymerizable monomer. Insulating rail type for adhesive rail insulation seams consisting of plates that are impregnated into layers, laminated alternately and cured. 2. A glass cloth layer, a glass chopped strand, a vinyl ester resin having a heat distortion temperature of 220 to 270 ° C., which is a vinyl ester composed of novolac type glycidyl ether and unsaturated monobasic acid mixed with styrene as a polymerizable monomer. Layers impregnated, alternately laminated, and cured, and the surface contacting the rail end of the top has 2 to 3 parts.
Insulation rail type for adhesive rail seams with a gradient of °.