JPH05319261A - Sander for locomotive - Google Patents

Abstract

PURPOSE: To supply an appropriate amount of sands in proportion to a travelling speed between a wheel and a rail in order to increase a holding power of the wheel of a locomotive to the rail. CONSTITUTION: The upper end has an entry pipe 5 for feeding sands, and the lower end is provided with a vertical capillary tube 4 having a shut off valve operating electrically in a housing l, and a lower end side of the capillary tube 4 is connected to a mixture chamber 7 having an air supply pipe 8 of a compressed air and an exit pipe 9 for feeding out a mixture of sands and an air, and the shut off valve is disposed in an excitation region of an electromagnetic driver, and also an electric pulse signal of a cycle in proportion to a travelling speed is input into the electromagnetic driver by a speed information transmitter 1 and a control unit 2, and the shut off valve is opened and closed in the cycle in response to the travelling speed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to rail transportation technology,
More specifically, the present invention relates to a device for improving the holding force of wheels on a rail, that is, a sand sprinkling device for a locomotive.

[0002]

2. Description of the Related Art Since the beginning of rail transportation, to the present day, a sanding device is installed on a locomotive to supply sand between a wheel and a rail to improve the rail holding force of the wheel. Things are widely practiced. Sand has a wrapping effect, and is easily available and inexpensive.

At present, the basic operation of the sand-spreading device, which is widely used for rail transportation, is to send the loaded sand by compressed air. A typical sanding device of this kind is used on many locomotives in the Soviet Union and is equipped with a housing with fittings that deliver the compressed air necessary to send the sand. (Reference: “Structure, Analysis and Design of Locomotives” by A. A. Kamev
aev), Masinostroeni Publishing House, Moscow, 19
1981, pp. 231-237).

Locomotives in other countries are also equipped with similar operating sanders.

[0005]

The sanding device of this type has the following drawbacks.・ Since the sand supply is fixed, the efficiency is low and it is uneconomical. -It is difficult to supply sand at the desired rate.・ The effect of sanding is insufficient.・ Operation will be uncertain due to water entering the sand from the ends of the compressed air and sand supply pipes.

In order to solve these drawbacks, there has been considered a sand sprinkling device in which sand is isolated from the mixing chamber by an electromagnetically driven on-off valve. This sanding device comprises a conduit connecting a container and a sand pipe, a compressed air supply joint, and an electromagnet having a spring pressure type actuator connected to an on-off valve.

Further, a sanding device which is a modification of the above is also known. It consists of a container connected via a vertical conduit to a fitting for compressed air supply and a pipe for delivering a sand-air mixture, in the form of a plate, the upper end of which is attached to the wall of the conduit and the lower end of the electromagnetic drive. A shutoff valve disposed in an operating region is provided, and the electromagnetic drive device is configured by two electromagnets and permanent magnets attached to both surfaces of a valve plate.

This type of device has the following drawbacks:・ Because the sand supply is fixed, the efficiency is low and uneconomical. -Because the sand is pulled in with a strong force, the wear of the members is fast.

It is an object of the present invention to provide an efficient, economical and reliable sanding device.

[0010]

In order to achieve the above object, the present invention is configured as follows.

In the main body (3), on the upper end side, there is a conduit (4) perpendicular to the inlet pipe (5) for feeding sand, and
At the lower end side of (4), a mixing chamber (7) having an air supply pipe (8) for compressed air and an outlet pipe (9) for sending out a mixture of sand and air is connected via an electrically operated stop valve. In a sand locomotive device for a locomotive having a housing (3), the stop valve is arranged in a magnetic field of an electromagnetic drive, and the stop valve is fixed to the housing (3). The locomotive sand-sprinkler further comprises an elastic plate (11) having a closing device (10) for periodically closing the measuring hole (6) in the conduit (4) perpendicular to one end. apparatus.

In the above device, the electromagnetic drive device comprises a speed information transmission device (1) and a control unit (2), and its iron core (18) is axially movable and a coil (17).
It is desirable to mount it as a stationary object.

It is desirable to provide the closure device (10) with a weight (12) which can interact with the housing (3).

Based on experience and theoretical considerations, the requirement that the sanding device of the present invention has is to strictly control the amount of sand supplied to the contact surface between the wheel and the rail, and to obtain the maximum traction coefficient. To be able to achieve it. Whether the amount of sand is large or small, the traction coefficient (adhesive force between the wheel and the rail) decreases. To keep the traction coefficient at maximum,
It is necessary to change the amount of sand supplied by the sanding device according to the speed of the locomotive.

For this purpose, sand is pumped through vertical conduits into the mixing chamber and then by compressed air under the wheels of the locomotive. This operation is performed by closing the stop valve of the measuring hole,
It is performed by opening in synchronization with an electric pulse proportional to the speed of the locomotive input from the control unit to the electromagnet.

This makes it possible to increase the amount of sand supplied as the speed of the locomotive increases.

In order to surely operate the sanding device, the closing device is provided with an elastic plate attached in a cantilever manner,
The closure device and the sand contact each other at a minimum angle to reduce frictional forces and reduce wear due to the interaction of the closure device and the sand.

The clearance between the closing device and the measuring hole is set to be 2 to 3 times the diameter (1.0 to 1.5 mm) of the sand particles so as to prevent the sand particles from being crushed, thereby preventing the occurrence of wear.

In order to emphasize the effect of the sanding device by controlling the initial setting value of the sand supply amount, the position of the iron core of the electromagnet is mounted so that it can be displaced with respect to the coil.

That is, the locomotive sand-spreading device of the present invention ensures the maximum traction coefficient (gripping force between the wheel and the rail) when the locomotive travels, and has an amount proportional to the speed of the locomotive. The feature is that the sand is supplied to the contact surface between the wheel and the rail.

[0021]

[Operation] Sand is sent from the inlet pipe (5) to the conduit (4) and stored therein, and the closing valve of the measuring hole (6) at the end of the conduit (4) is periodically opened and closed by an electromagnetic drive device. , Sand is sent to the mixing chamber (7) and is sent to the bottom of the wheel by compressed air.
By the speed information transmission device (1) and the control unit (2), a pulse signal having a cycle corresponding to the traveling speed is input to the electromagnetic drive device to supply sand in an amount proportional to the traveling speed.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a sectional front view showing an embodiment of a locomotive sanding device of the present invention.

In this sanding device, the control unit (2) connected to the speed information transmission device (1) is electrically connected to the sanding nozzle. Sanding nozzle in the housing
(3) and the conduit (4) provided in the housing (3),
The conduit (4) has an inlet pipe (5) for supplying sand at the upper end,
Also, there is a measuring hole (6) at the lower end, and in this measuring hole (6),
A stop valve that is electrically controlled to open and close is connected to a mixing chamber (7). In the mixing chamber (7), a compressed air supply pipe (8),
An outlet pipe (9) for delivering a mixture of sand and air is provided.

The end surface of the measuring hole (6) is adapted to be closed periodically by the closing device (10), and the closing device (10) is closed.
Is supported in a cantilever manner on an elastic plate (11) to which a weight (12) is attached.

One armature (13) is put in place on the elastic plate (11).
Is attached to face the electromagnet (14). Electromagnet (14)
Is a frame (15) provided with a boss (16), a coil (17),
It is composed of an iron core (18) and the iron core (18).
It is fixed to the frame (15) by means of 9) and the lock nut (20). A screwdriver groove (21) at the end of the screw shaft (19)
Is provided. The coil (17) is separated from the mixing chamber (7) by the packing (22).

The operation of the sanding device of this locomotive is as follows. Closing device by feeding sand from the inlet pipe (5)
Store in a vertical conduit (4) with the lower end closed at (10).

When it is necessary to supply sand under the wheels of the locomotive, a variable period electric pulse signal is sent from the control unit (2) based on the speed information signal from the speed information transmission device (1). It is generated and input to the electromagnet (14). As a result, a pulse signal having a period proportional to the traveling speed of the locomotive is input to the electromagnet (14).

As a result, the armature (13) is attracted to the electromagnet (14), attracts the elastic plate (11) and the closing device (10), and the measurement hole (6) and the iron core of the electromagnet (14) ( 18) is periodically oscillated to open the measurement hole (6) in synchronism with the pulse signal, and sand is sent into the mixing chamber (7).

At the same time when the electric pulse signal is started to be generated, compressed air is sent to the mixing chamber (7) from the air pipe (8),
Send the sand through the outlet pipe (9) under the wheels of the locomotive. To stop the sand supply, it is sufficient to stop the energization of the coil (17) and the supply of compressed air.

A pulse signal having a period proportional to the traveling speed of the locomotive is input to the electromagnet (14) to close the measuring hole (6).
By opening and closing by (10), the sand supply amount can be adjusted according to the traveling speed.

FIG. 2 is a graph showing the characteristics of the sand spreader according to the present invention, showing the relationship between the sand supply amount and the running speed of the locomotive.

The initial value of the sand supply amount is to coil the iron core (18).
It can be adjusted by moving it with respect to (17). In order to move the iron core (18), the screw shaft (19) is rotated by the driver groove (21) and fixed by the lock nut (20) at a desired position.

By this operation, the magnetic field of the electromagnetic coil is changed to change the amplitude of the armature (13) and the attraction force to the iron core (18).

In order to improve the condition of the release of sand from the measuring hole (6), when a weight (12) is attached to the closing device (10) and the closing device (10) returns to the closed position, The impact on the wall surface at the end of the measuring hole (6) is relieved.

The sanding device of the present invention can be applied as a means for supplying a powdery material even in an industrial field other than a locomotive. When used for other than a locomotive, the speed information transmission device and the control unit may be replaced with an electric pulse generator.

[0036]

【The invention's effect】

(a) By adjusting the amount of sand supply for increasing the ability to hold the rails in proportion to the running speed of the locomotive, sand usage efficiency is improved, and an economical locomotive sand-spreading device is provided. Can be realized.

(B) By optimizing the pulling motion of the working part of the nozzle according to the sand, the working efficiency of the sanding device can be improved.

(C) The sand utilization efficiency (at standard traction coefficient) is improved by 5-15%.

(D) The consumption of sand can be reduced to 1/2 or less.

(E) It reduces wear on the wheel perimeters and rails, and also reduces damage to equipment not protected against sand installed under the floor of the locomotive.

(F) It is possible to secure safe driving.

(G) There is little risk of damaging the rail track.

[Brief description of drawings]

FIG. 1 is a sectional front view of an embodiment of a locomotive sanding device of the present invention.

FIG. 2 is a graph showing the operating characteristics of the sand spreader of the present invention, with the horizontal axis representing the traveling speed and the vertical axis representing the amount of sand supplied.

[Explanation of symbols]

(1) Velocity information transmission device (2) Control unit (3) Housing (4) Conduit (5) Inlet pipe (6) Measuring hole (7) Mixing chamber (8) Air supply pipe (9) Outlet pipe (10) Closed Device (11) Elastic plate (12) Weight (13) Armature (14) Electromagnet (15) Electromagnet frame (16) Boss (17) Coil (18) Iron core (19) Screw shaft (20) Lock nut (21 ) Driver groove (22) Packing

Continued from the front page (72) Inventor Alexei Nikolaevich Konyaev Soviet Union Lugansk Proshad Geroev Velikoy Otechestov Venoy Voyny 8 Cavui 58 (72) Inventor Alexander Leonidovic Gor Benko Soviet Union Lugansk Urıkılıřív Villi Wilgermovich Avgusto Soviet Union Lugansk Kvartal 50 Let Oktchavrya 41 Ar Cavui 47 (72) Inventor Georgy Sergevich Melikza Nov Soviet Union Karzskaya Oblast Ludinovo Ulitsa Chugunova 2 72 Inventor Alexevich Baleskov Soviet Union Karzskaya Oblast Rudinovo Urica 3 Intelnatu Onara 31 Kavui 66 (72) Inventor Alexander Nikolaevich Voroshenko Soviet Union Lugansk Kvartar Komarova 35 Kavui 53 (72) Inventor Nikolai Matvevic Mikuhin Soviet Union Moscow Ulyssa Shosayanya 58 Inventor 143 Cave 2 143 Eric Kelmtovic Thasung Soviet Union Lugansk Kvartar Zukova 7 Cave 12 (72) Inventor Alexander Semenovich Kruyev Soviet Union Lugansk Urica Usa Cova 41 (72) Inventor Petr Ivanovich Kudra Soviet Union Lugansk Kvartal Komatar Komatar

Claims (3)

[Claims] 1. An inlet pipe for feeding sand into the upper end side.
(5) has a conduit (4) perpendicular to it, and on the lower end side of the conduit (4), through an electrically operated shut-off valve, an air supply pipe (8) for compressed air, and a mixture of sand and air. In a sand locomotive device of a locomotive provided with a housing (3) to which a mixing chamber (7) having an outlet pipe (9) for sending out is supplied, the shut-off valve is arranged in a magnetic field of an electromagnetic drive device. The stop valve is fixed to the housing (3) and has an elastic plate (11) having a closing device (10) for periodically closing the measurement hole (6) in the conduit (4) perpendicular to one end. ) Is provided with a sand locomotive device for a locomotive. 2. The electromagnetic drive device is a speed information transmission device (1).
2. The engine according to claim 1, further comprising a control unit (2) and a control unit (2), the iron core (18) being mounted so as to be movable in the axial direction and immovable with respect to the coil (17). Car sanding equipment. 3. A locomotive sanding device according to claim 1, characterized in that the closing device (10) is provided with a weight (12) capable of interacting with the housing (3).