RU2096220C1 - Railway vehicle axle-box overheating control device - Google Patents

Abstract

FIELD: railway transport; train control systems; device for automatically stopping the train in case of overheating of axle boxes. SUBSTANCE: device has cylinder with piston secured on axle box. Hole is made in one of end face walls of cylinder to pass piston rod. Cover is installed over the hole on above-indicated end face wall. Hole is made in zone formed under piston in cylinder wall to connect cylinder with brake main line and temperature sensitive member is installed. Piston is spring-loaded in cylinder at side opposite to rod and luminous mark is made on rod. Piston is secured in lowermost position by temperature sensitive member manufactured of easily melting material. Direct-acting valve in piston body is adjusted for pressure of 4-4.4 kgs/cm² and is connected through brake main line with atmosphere. Thread for attachment of cover is made on side wall of cylinder. Luminous mark is made under cover on cylinder wall. EFFECT: enlarged operating capabilities, improved reliability of operation. 1 dwg

Description

 The invention relates to railway transport, and more specifically to systems for monitoring and signaling the condition of the axle boxes of a train, and can be used to automatically stop a train due to heating of the axle boxes.

 Known devices for detecting overheated axle boxes of a train containing temperature sensors mounted on each axle box, connected via electrical devices to the brake line. When the axle box is heated, temperature sensors give a signal to the explosive element connecting the brake line to the atmosphere, as a result of which the train is automatically braked (US patent N 3930629, B 61 K 9/04, 1976).

 The disadvantage of this device is that the air leaves the brake line and it takes a certain amount of time to eliminate the effects of auto-braking. In addition, these devices do not allow to detect visually warming axle box, and the imperfection of the design creates problems when eliminating the flow of air from the brake line of the train.

 A device is also known for controlling the overheating of axleboxes installed on each axle box and connected to the brake line of a train through a flexible hose. When the axlebox is heated, the fusible material melts and passes air into the internal cavity. Under the pressure of the incoming air, the piston rises and creates a brake line of the train with the atmosphere, as a result of which the train automatically brakes (ed. St. N 1497088, B 61 K 9/04, 1989).

 However, when the brakes are applied, this device does not prevent the outflow of air from the brake line to complete exhaustion. In addition, the imperfection of the design does not allow the visually warming axle box to be detected at night, and also to eliminate the effects of auto-braking in a short period of time for taking the train with the emergency axle box to the station.

 This device, as the closest to the proposed technical solution for the technical nature, the authors have chosen as a prototype.

 The objective of the invention is to expand the functionality by increasing the likelihood of detecting a heating axle box at any time of the day, reducing the time required to eliminate the effects of auto-braking, eliminate the effects of auto-braking without the use of tools and improvised materials, the possibility of taking a train from a train to a station without requiring assistance, and maintaining the integrity of the brake line after braking the train.

 The problem is achieved in that in a device containing a piston with an internal valve adjusted to a pressure of 4-4.4 kgf / cm, the piston rod is coated with a luminous composition that facilitates the search for heating axle box at night. Temperature limit sensor screw made of fusible material, holding the piston in the lower position. Under the piston is a compressed spring. A cover is screwed onto the side of the device housing to eliminate the effects of auto-braking. Under the cover there is a luminous spot, which after removing the cover allows you to quickly detect an emergency box.

 The proposed technical solution differs from the prototype in that the piston has a check valve adjusted to a pressure of 4-4.4 kgf / cm, which is a spring-loaded ball and is located in the piston body, the piston rod is covered with a luminous composition. A cover is screwed onto the device body, which is used to eliminate the effects of auto-braking.

 Thus, the presence of new elements in the proposed design: a check valve adjusted to a pressure of 4-4.4 kgf / cm, a spring spring-loaded piston, a temperature sensor made in the form of a screw holding the piston in the lower position, as well as an auto-brake cover, proves the conformity of the proposed technical solution to the criterion of "novelty" and "inventive step".

 The essence of the invention is illustrated in the drawing, which shows a longitudinal section of the proposed device.

 The device is mounted on the body of the axle box 1 and consists of a temperature sensor 2, housing 3, spring 4, piston 5, o-rings 6, cover 7, luminous spot 8, housing cover 9, rod 10, light mark 11, plug 12, valve spring 13 , ball 14 and air inlet fitting 15.

 The initial state of the device.

 Under normal operation of the axle box, the piston 5 is lowered down and blocks the air supply hole from the brake line.

 The spring 4 is in a compressed state, the screw-temperature sensor keeps the piston 5 in the lower state. The rod 10 is recessed in the housing of the device. The cover 7 is screwed onto the side thread of the housing and covers the luminous spot 8.

 The device operates as follows.

 When the axlebox 1 is heated, the fusible screw 2 melts and releases the piston 5, spring-loaded with a spring 4. Rising piston opens a hole for air inlet from the brake line. Air under a pressure exceeding 4.5 kgf / cm enters through the valve, adjusted to 4-4.4 kgf / cm, until the pressure in the brake line is equal to the pressure of 4-4.4 kgf / cm . A decrease in pressure will cause auto-braking and stopping the train. After reducing the pressure in the brake line to 4-4.4 kgf / cm, the ball 14 closes the hole and blocks the air, thereby preventing depletion of the brake line. At the same time, the piston rod 10 extends out of the housing. A luminous mark 11 indicates an emergency box.

 After the overheated axle box is detected along the extended end of the stem 10 with the mark 11 in order to ensure normal operation of the auto-brakes, the protruding end of the stem together with the piston 5 is moved to its original state by screwing the cover 7 onto the threaded cylindrical section of the body cover 9, thereby preventing the device from tripping when the train driving to the station.

 The luminous spot 8, opened by removing the cover 7, allows, if necessary, to quickly detect an emergency box at any time of the day.

Claims (1)

A device for controlling the overheating of the axlebox of a vehicle, comprising a cylinder with a piston fixed to the axle box, in one of its end walls an opening for the piston rod is made, over which a cover is mounted on said end wall, in the zone formed under the piston, an opening is made in the cylinder wall for connections to the brake line and a heat-sensitive element, characterized in that in the cylinder cavity the piston is spring-loaded on the back of the rod, on which the luminous mark is applied, the piston is fixed in It position thermosensitive element of a fusible material, and a piston body made of direct action valve is adjusted to a pressure of 4.4 4.0 kg / cm ^2, and is connected via a brake line to the atmosphere, and the side wall of the cylinder is threaded for securing the lid, under which a luminous mark is applied.