JP4990700B2 - Electric switch alarm system - Google Patents

Description

The present invention relates to an alarm system for an electric switch .

  2. Description of the Related Art Conventionally, an electric switch that switches the course of a train is known. The electric switch performs line switching by operating the Tongler based on a command signal from a central control command station (higher-level device) by a driving force of an electric motor or the like.

The cause of failure of an electric switch is not necessarily uniform, and there are various factors. Broadly speaking, there are failure factors caused by environmental factors at the installation location, and other failure factors not related to the installation location, such as malfunction of the communication line with the host device. In the maintenance and inspection of the electric switch, it is efficient and economical to divide and perform each failure factor.
Examples of failure factors caused by environmental factors at the installation location include, for example, pebbles or the like sandwiched between the Tongrel and the stock rail, or inundation of rainwater or the like into the electric switchboard.
At present, confirmation / inspection of whether or not the electric switch has been inundated is based on information on the track status from the train crew and information on the past inundation status of the electric switch. Yes. In addition, after a heavy rain such as a typhoon, a large number of security personnel are mobilized to perform individual inspections. If an electrical tipping machine that has been submerged is overlooked, the internal device may rust and cause malfunctions, so a thorough inspection is necessary.
However, since a large number of electrical switchboards are arranged on the track, it takes a lot of time and labor to mobilize a large number of security personnel and check each of the electrical switchboards one by one.
As one proposal, there is a proposal to solve the problem due to water immersion by making the electric switch itself waterproof (see, for example, Patent Document 1). In addition, as another proposal, there is a technique for detecting inundation by attaching an inundation sensor (see, for example, Patent Document 2).
Japanese Patent Laid-Open No. 10-18201 JP-A-6-186121

  However, although the electric switch of Patent Document 1 described above is excellent in waterproofness, the manufacturing cost for providing a waterproof structure may increase significantly. In addition, replacing all of the many existing electric switchboards with a waterproof type imposes a considerable cost burden and is not realistic.

  Further, since the contact detection sensor of Patent Document 2 is turned ON / OFF in conjunction with the rise / fall of the water level, it can detect that the contact is in the flooded state. However, when the water is pulled down and lowered, the contact point automatically returns to the original position, so it is impossible to know whether there has been water immersion after the fact. In order to maintain the operation of the inundation detection sensor, a complicated electric circuit must be separately installed, which complicates the configuration and increases the construction cost.

An object of the present invention is to provide an alarm system for an electric switch that can detect a flooded state with a simple and small structure and can maintain the detected state.

In order to solve the above-described problem, an alarm system for an electric switch of the invention according to claim 1 comprises:
A hollow casing that can be submerged inside, a buoyant float that is slidably housed in the casing, a magnet that is attached to a floating direction end of the buoyant float, and the above-described case where water is submerged into the casing. An inundation detection sensor and a tongue comprising a reed switch having a pair of electrical contacts that attract and hold the magnet when the floating float floats, and that are electrically separated from or in contact with each other when the magnet is attracted An electric switch having a lock error detection circuit provided in the housing for detecting whether or not the lock can be locked after the rail switching operation;
Connected to the inundation detection sensor and the lock error detection circuit, and operates when an inundation is detected by the inundation detection sensor, and detects that the lock lock is not locked by the lock error detection circuit. An alarm device having an alarm circuit that is activated when
The flood detection sensor is connected to the flood alarm circuit through the lock error detection circuit and notifies the flood of the electric switch .

The invention according to claim 2 is the alarm system for the electric switch according to claim 1 ,
The inundation detection sensor holds the magnet in an attracted state after the inundation in the casing is pulled and buoyancy with respect to the buoyant float is lost.
The invention according to claim 3 is the alarm system for the electric switch according to claim 1 or 2 ,
The reed switch has a water-sealing structure, and is provided at a position facing the magnet at the upper end of the floating float in the casing in the floating direction, and a conductive fixed contact and a magnetic body that always contacts the fixed contact The movable contact made of the magnetic material is arranged in such a direction as to move away from the fixed contact by the magnetic force of the magnet.

ADVANTAGE OF THE INVENTION According to this invention, the alarm system of the electric switch which can detect a flooding state reliably with a simple and small structure, and can hold | maintain the detection state can be provided.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the scope of the invention is not limited to the illustrated examples.

[Electric switch]
First, a schematic configuration of the electric switch 1 will be described with reference to FIG. The electric switch 1 is a device that switches the course of a train. Specifically, the electric switch 1 has a motor M as a drive source on one end side of the housing 2. In the housing 2, a transmission mechanism that transmits the driving force of the motor M, a reduction gear, a conversion gear, an operation lever, and a locking pin (all not shown) are provided.

As shown in FIG. 1, the electric switch 1 is installed on a track R that is outdoor or indoor (including a subway).

[Inundation detection sensor]
Next, with reference to FIG. 2 (A) (B), schematic structure of the infiltration detection sensor 11 is demonstrated. 2A includes a casing 12, a reed switch (magnetic proximity switch) 13, a magnet 14, a floatable float 15, and a water absorption hole 16.

The casing 12 is made of a non-magnetic material, has a hollow inside, and houses the reed switch 13, the magnet 14, and the float 15. The casing 12 is made of plastic, for example. The casing 12 has a plurality of water conduction holes 16. The water introduction hole 16 is a through hole for introducing rainwater or the like into the casing 12. When rain water or the like is introduced through the water introduction hole 16, the inside of the casing 12 is submerged.

The reed switch 13 is a so-called normally closed contact (normally closed) type switch. When the float 15 floats due to water in the casing 12, the magnet 14 is attracted to maintain the attracted state. It has a fixed contact 13A and a movable contact 13B (see FIG. 3) which are a pair of electrical contacts that are separated (or in contact) with each other. The reed switch 13 has a sealed structure in which a fixed contact 13A and a movable contact 13B are enclosed in an envelope, and is provided at a position facing the magnet 14 at the upper end of the float 15 in the casing 12 in the floating direction. The fixed contact 13A and the movable contact 13B will be described later. The reed switch 13 is ON when it is normal, that is, when there is no water in the casing 12.

The magnet 14 is attached to the end of the float 15 in the flying direction. The magnet 14 is held in a state of being attracted to the reed switch 13 when the float 15 floats due to water immersion in the casing 12.

The float 15 is slidably accommodated in the casing 12 so as to float in the state when installed. The float 15 is preferably as light as possible in order to reduce the size of the inundation detection sensor 11 itself. For example, the float 15 is made of a material such as foamed polystyrene.

As shown in FIG. 2 (B), a through hole 17 is formed in the upper surface of the casing 12. The through hole 17 is used to return the inundation detection sensor 11 to the original state, that is, the ON state after the inspection of the inundation detection sensor 11 is completed. That is, rainwater is immersed in the casing 12, the magnet 14 and the float 15 rise, the fixed contact 13A and the movable contact 13B are separated, and this state is maintained, so that the security staff penetrates the rod 21 after the inspection is completed. This is because the magnet 14 and the float 15 are pushed down by being inserted into the hole 17 and returned to their original positions (see FIG. 3A).

Next, with reference to FIGS. 3A and 3B, the configuration and operation of the inundation detection sensor 11 during normal operation and during inundation will be described. 3A and 3B are cross-sectional views taken along line AA in FIG.
FIG. 3A is a view showing the inundation detection sensor 11 in a normal state. The normal state is a state where the casing 12 is not submerged, that is, a state before the magnet 14 and the float 15 are levitated. In this case, the magnet 14 is separated from the reed switch 13, and the magnetic force of the magnet 14 does not act on the reed switch 13, so that the movable contact 13B is kept in contact with the fixed contact 13A. That is, the reed switch 13 is in an ON state.
Reference numeral 18A denotes a lead wire connected to the fixed contact 13A. Since the movable contact 13B needs to be opened and closed by the magnetic force of the magnet 14, a magnetic material is used. The reed switch 13 is disposed sideways in the drawing in order to cause the movable contact 13B to be separated and contacted with the fixed contact 13A by the magnetic force of the magnet 14.

Next, with reference to FIG. 3 (B), the schematic structure of the inundation detection sensor 11 at the time of inundation is demonstrated. Now, it is assumed that rainwater Q enters the casing 12 through the water guide hole 16 and reaches the predetermined water level S from the bottom surface of the casing 12. In this case, as shown in FIG. 3B, the float 15 floats, and the magnet 14 attached to the end of the float 15 in the floating direction is attracted to the reed switch 13. When the magnet 14 is attracted to the reed switch 13, the movable contact 13B of the reed switch 13 is attracted by the magnetic force of the magnet 14 and separated from the fixed contact 13A. That is, the reed switch 13 is turned off. When the reed switch 13 is turned off, an alarm is output in the host device 43 (see FIG. 4) electrically connected to the lead wires 18A and 18B.
Next, for example, when rain stops and water in the casing 12 is pulled and the water level is lowered, the attracted state of the magnet 14 to the reed switch 13 is still maintained, and the OFF state of the reed switch 13 is retained. This is designed in consideration of the balance between the total weight of the magnet 14, the flow 15, and the attractive force on the reed switch 13 due to the magnetic force of the magnet 14.
Since the reed switch 13 is kept in the OFF state even after the water has disappeared in this way, it is possible to know that there has been water in the electric switch 1 with an alarm described later.
Further, since the holding operation in the OFF state of the reed switch 13 is a mechanical operation by the attracting operation of the magnet 14, an electric holding circuit is not required, so that the configuration can be simplified and the labor of construction can be greatly reduced. .
After the inspection is completed, the rod 21 is inserted into the through hole 17, and the magnet 14 and the float 15 are returned to their original positions (FIG. 3A) and reset.

Next, with reference to FIG. 4, the mechanism by which the inundation detection sensor 11 operates an alarm circuit (not shown) of the host device 43 at the time of inundation will be described. FIG. 4 is a diagram illustrating an example of a wiring diagram of the electrical switch machines 1A to 1C that are installed on the track. Electric switch 1A-1C is provided with lock deviation detection circuits 41A-41C, water immersion detection sensors 11A-11C, and lead wires 18A-18F, respectively.

The lock error detection circuits 41 </ b> A to 41 </ b> C are circuits that detect whether or not the lock cane (not shown) is locked (fixed) after the switching operation of the tongrel (not shown). The lock error detection circuits 41A to 41C include alarm contacts 42A to 42C, respectively. The alarm contacts 42A to 42C are contacts for operating the alarm circuit. When the alarm contacts 42 </ b> A to 42 </ b> C are turned ON or OFF, the alarm of the host device 43 is output. In the present embodiment, it is assumed that the alarm circuit of the host device 43 is activated when the alarm contacts 42A to 42C are turned OFF.

Assume that the lock lock detection circuit 41A detects that the lock is not locked. In this case, an alarm of the host device 43 is output via the alarm contact 42A. Here, as the alarm, for example, an alarm lamp (not shown) provided in the host device 43 can be cited, and a form for calling attention such as blinking the lamp as necessary is adopted. The alarm lamp is provided in the host device 43 corresponding to each of the electric switch 1A to 1C. Therefore, it is possible to reliably identify any one of the electrical switch machines 1A to 1C in which the lock lock is not locked, from among the many electrical switch machines 1 installed.

In FIG. 4, the configuration of each of the water intrusion detection sensors 11A to 11C is as described above. The inundation detection sensors 11A to 11C are connected in series to the wiring loops of the alarm contacts 42A to 42C of the lock error detection circuits 41A to 41C. The lead wires 18A to 18F correspond to the lead wires 18A and 18B described in FIG.
Now, for example, it is assumed that water is generated in the electric switch 1A and the water detection sensor 11A is turned off. In this case, the inundation alarm circuit of the host device 43 is activated via the lead wires 18A and 18B and the alarm contact 42A, and it is notified that the electric switch 1A has been inundated due to the flashing of the inundation indicator lamp or the like. Thus, it is possible to identify the flooded electrical switch 1A from among the electrical switches 1A to 1C that are installed in large numbers. That is, it is possible to reliably identify the cause of the failure of the electric switch. The same operation as described above is performed for the water intrusion detection sensors 11B and 11C of the other electric switching machines 1B and 1C.

  As described above, according to the present embodiment, when the float 15 floats due to water in the casing 12, the magnet 14 is attracted to the reed switch 13 and maintains the attracted state. When the movable contact 13B is separated, the alarm of the host device 43 is activated. As a result, it is possible to provide an inundation detection sensor that can reliably detect the inundation state with a simple and small structure and can maintain the detection state.

  The reed switch 13 has a sealed structure, is provided at a position facing the magnet 14 at the upper end of the float 15 in the casing 12, and has a fixed contact 13A and a movable contact 13B. The magnet 14 is arranged in such a direction as to move away from the fixed contact 13 </ b> A by the magnetic force of the magnet 14. Thereby, the reed switch 13 can be used as a normally closed switch.

  In addition, the electric switch 1 includes a flood detection sensor 11. As a result, when the electrical switch 1 is flooded, the flood detection sensor 11 detects the flood, so that the cause of the failure of the electrical switch 1 can be reliably identified.

  Further, since the attracting state is held by the magnetic force of the magnet 14, the attracting state can be maintained even if the electric switch 1 vibrates.

  Moreover, since the inundation detection sensor 11 has a simple and small structure, it can be easily incorporated into an existing electric switch with no room in the internal space.

  In addition, the description in the said embodiment is an example of the inundation detection sensor and electric switch concerning this invention, and is not limited to this.

  For example, in the above embodiment, the reed switch 13 is a normally closed switch, but the present invention is not limited to this. For example, a normally open type switch may be used. In this case, when the magnet 14 attracts the reed switch 13, the fixed contact 13A of the reed switch 13 and the movable setting 13B come into contact with each other.

  In addition, the alarm lamp and the flooding display lamp of the host device 43 are blinked, but the present invention is not limited to this. For example, it is good also as changing the color of the warning lamp of the high-order apparatus 43, and a flooding display lamp.

  In addition, the detailed structure and detailed operation of the inundation detection sensor and the electric switch in the present embodiment can be changed as appropriate without departing from the spirit of the present invention.

It is the figure which showed schematic structure of the electric switch concerning this invention. FIG. 2A is a diagram showing a schematic configuration of the inundation detection sensor. FIG. 2 (B) is a view showing holes on the upper surface of the casing. FIG. 3A is a diagram illustrating a normal water immersion detection sensor. FIG. 3 (B) is a diagram showing a flood detection sensor during flooding. It is the figure which showed the example of a wiring diagram of an electric switch.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric switch 2 Case 11 Infiltration detection sensor 12 Casing 13 Reed switch 14 Magnet 15 Float 16 Water conveyance hole 17 Through-hole 43 Host device

Claims (3)

A hollow casing that can be submerged inside, a buoyant float that is slidably housed in the casing, a magnet that is attached to a floating direction end of the buoyant float, and the above-described case where water is submerged into the casing. An inundation detection sensor and a tongue comprising a reed switch having a pair of electrical contacts that attract and hold the magnet when the floating float floats, and that are electrically separated from or in contact with each other when the magnet is attracted An electric switch having a lock error detection circuit provided in the housing for detecting whether or not the lock can be locked after the rail switching operation;
Connected to the inundation detection sensor and the lock error detection circuit, and operates when an inundation is detected by the inundation detection sensor, and detects that the lock lock is not locked by the lock error detection circuit. An alarm device having an alarm circuit that is activated when
The flooding detection sensor is connected to the flooding alarm circuit via the lock error detection circuit, and is an alarm system for an electrical switch machine that reports the flooding of the switchboard . 2. The alarm system for an electric switch according to claim 1, wherein the inundation detection sensor retains the attracted state of the magnet after the inundation in the casing is pulled and buoyancy with respect to the buoyant float is lost . The reed switch has a water-sealing structure, and is provided at a position facing the magnet at the upper end of the floating float in the casing in the floating direction, and a conductive fixed contact and a magnetic body that always contacts the fixed contact The alarm system for an electric switch according to claim 1 or 2 , wherein the movable contact made of a magnetic material is arranged in a direction to move away from the fixed contact by the magnetic force of the magnet. .

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