JP2000355476A - Hydraulic elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To drain water before flooding without bringing drain equipment in the disaster-stricken area by arranging a detecting means for detecting that water gathers in a machine room or a pit, and draining the water outside by starting a pump by closing ordinary time solenoid valves. SOLUTION: A float switch 4a is arranged to detect water gathered in a hoistway 1, and a float switch 4b is arranged to detect water gathered in a machine room 5. When the float switch 4a or 4b detects the water, a control panel 6 closes ordinary time solenoid valves 10a, 10b, and actuates a pump 9b by starting a motor 9a. Next, the control panel 6 opens draining solenoid valves 13a or 13b, 13c to drain the water gathered in a pit 3 or the machine room 5 to the outside to thereby drain the water by the pump of a power unit of a hydraulic elevator before flooding an elevator apparatus without bringing drain equipment in the disaster-stricken area.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a hydraulic elevator.

[0002]

2. Description of the Related Art Generally, a hydraulic elevator is provided with a hydraulic jack provided in a hoistway for raising and lowering a car, a pump connected to the hydraulic jack via a pipe, and an oil tank connected to the pump and a pipe. And a normal solenoid valve provided in piping before and after the pump.

[0003] When water accumulates in a pit below the hoistway or in a machine room provided with a pump and an oil tank due to heavy rain or the like, drainage equipment is installed from outside to perform drainage work.

[0004]

In the above-mentioned prior art, it is necessary to bring drainage equipment to the stricken area, and if there are many flooded sites in the stricken area, it takes a long time to drain and return. There was a problem. Further, when the machine room and the hoistway are submerged, it is necessary to replace the control panel and the power unit, and there is a problem that it takes a lot of time and cost to return.

It is an object of the present invention to provide a hydraulic elevator capable of draining water before flooding without bringing drainage equipment to a disaster area.

[0006]

SUMMARY OF THE INVENTION The object of the present invention is to provide a hydraulic jack provided on a hoistway for raising and lowering a car, a pump connected to the hydraulic jack via a pipe, and a pump connected to the pump via a pipe. In a hydraulic elevator composed of an oil tank and a solenoid valve normally provided in piping before and after the pump, a machine room in which the oil tank and the pump are installed, or a machine room in a pit below a hoistway is provided. Alternatively, a detecting means for detecting that water has accumulated in the pit is provided, and when the detecting means is operated, the electromagnetic valve is normally closed and the pump is started, and the pump is started to discharge water in the machine room or the hoistway to the outside. This is achieved by providing a drainage means for discharging water to the drain.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a hydraulic elevator provided with a drainage device at the time of flooding according to an embodiment of the present invention, and FIG. 2 is a flowchart of a drainage operation.

In FIG. 1, 1 is a hoistway, 2a is a hydraulic jack provided on the hoistway, 2b is incorporated in the hydraulic jack, and is a plunger which moves up and down by hydraulic oil, 2c
Is a main rope fixed on one end in a hoistway, the other end is fixed on a car, and a sheave provided on the upper end of the plunger, 3 is a hoistway pit, 4a is water collected in the hoistway. Is a float switch for detecting

5 is a machine room, 4b is a float switch for detecting water accumulated in the machine room, 6 is a control panel, 7 is a hydraulic oil tank, 8 is hydraulic oil, 9a is a motor of a hydraulic power unit, 9b Is a hydraulic power unit pump. 10a is a pipe 11 between the oil tank 7 and the pump 9b.
The normal electromagnetic valve 10b is provided in the pipe 12 between the pump 9b and the hydraulic jack 2a, the normal electromagnetic valve 13b is provided with one end opened to the pit 3, and the other end is provided in the pipe 11
An electromagnetic valve for drainage provided on a drainage pipe 14a connected to the drain pipe 14a has one end opened to the machine room 5 and the other end connected to the pipe 11
An electromagnetic valve for drainage provided in a drainage pipe 14b connected to the drainage electromagnetic valve 13c has one end opened to a drainage groove (not shown) and the other end provided to a drainage pipe 15 connected to the pipe 12. It is a valve.

Reference numeral 16a denotes a strainer for removing foreign matter when sucking water accumulated in the pit 3; 16b, a strainer for removing foreign matter when sucking water accumulated in the machine room 5; The other end is a return solenoid valve provided on a pipe 18 connected to the pipe 15. Reference numeral 20 denotes a strainer for removing foreign matter in the hydraulic oil.

In normal times, the motor 9a is started by a control signal generated by the control panel 6, the pump 9b is rotated, and the solenoid valves 10a and 10b are opened and closed in normal times.
Is sent to and returned from the hydraulic jack 2a via a pipe, whereby the plunger 2b moves up and down, and a basket (not shown) suspended at one end of the main rope 2c moves up and down.

The draining operation will be described with reference to the flowchart of FIG.

When water accumulates in the pit 3 at the bottom of the hoistway, a float switch 4a for detecting the accumulation of water.
Rises and sends a signal to the control panel 6 (S1). Upon receiving this signal, the control panel 6 normally operates the solenoid valves 10a and 10b.
To shut off the normal hydraulic circuit, the oil tank 7, the normal solenoid valve 10a, the pipe 11, the pump 9b, the pipe 12, the normal solenoid valve 10b, the hydraulic jack 2a, and the motor 9a, Activate the pump 9b (S
2). Next, the control panel 6 opens the drainage solenoid valves 13a and 13c to thereby control the strainer 16a and the pipe 14
a-Draining solenoid valve 13a-Piping 11-Pump 9b-Piping 12-Draining solenoid valve 13c-Draining water (not shown) drains water accumulated in the pit 3 of the hoistway to the outside (S).
3). The operation of (S3) is performed until the float switch 4a detects that the water level of the pit 3 has dropped. When drainage to the outside is completed, the water level of the pit 3 falls, so that the float switch 4a is lowered and the signal to the control panel 6 is cut off (S4). When the signal is cut off, the control panel 6 closes the drainage electromagnetic valves 13a and 13c and shuts off the drainage pipe route (S5).

When water accumulates in the machine room 5, a float switch 4b for detecting that water accumulates rises,
A signal is issued to the control panel 6 (S6). Upon receiving this signal, the control panel 6 normally closes the solenoid valves 10a and 10b,
Normal hydraulic circuit, oil tank 7-Normal solenoid valve 10a-
Piping 11-Pump 9b-Piping 12-Normal solenoid valve 10b
-Shut off the hydraulic jack 2a, start the motor 9a, and operate the pump 9b (S7). Next, the control panel 6 opens the drainage solenoid valves 13b and 13c, thereby causing the strainer 16b, the pipe 14b, and the drainage solenoid valve 1 to be opened.
The water collected in the machine room 5 of the hoistway is discharged to the outside through the route of 3b-pipe 11-pump 9b-pipe 12-pipe 15-drain solenoid valve 13c-drain groove (not shown) (S8). In the operation of the above (S8), the float switch 4b is
The process is performed until it is detected that the water level has dropped. When drainage to the outside is completed, the float switch 4b is lowered,
The signal to the control panel 6 is cut off (S9). When the signal is cut off, the control panel 6 closes the drainage electromagnetic valves 13b and 13c to shut off the drainage pipe route (S10). Pit 3
Alternatively, after all the drainage of the machine room 5 is completed, the solenoid valve 10a and the return solenoid valve 17 are normally opened to operate the oil tank 7-.
Hydraulic oil strainer 20-Normal solenoid valve 10a-Piping 11
-Pump 9b-Piping 12-Piping 15-Return solenoid valve 17
-Return pipe 18-Pump 9b in the route of waste oil tank 19
The water remaining in the pipes 11, 12, and 15 before and after that is washed away with the hydraulic oil 8 (S11). After the elapse of a predetermined time, when the removal of the water in the pump 9b and the pipes 11, 12, and 15 before and after the pump 9b is completed, the return solenoid valve 17 is closed, the normal solenoid valve 10b is opened (S12), and the normal operation is performed. (S13).

As described above, according to the embodiment of the present invention, when the machine room or the pit below the hoistway is flooded, the drainage equipment is not brought into the stricken area and the elevator equipment is not flooded. Can be drained by the pump of the power unit of the hydraulic elevator, damage to the elevator equipment can be prevented, and the restoration work of flood damage can be reduced.

[0017]

According to the present invention, even if a flood occurs in a machine room or a hoistway of a hydraulic elevator, the drainage can be performed without bringing a drainage facility to the affected area and before flooding. Can be.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a hydraulic elevator including a drainage device at the time of flooding.

FIG. 2 is a flowchart of a drain operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hoistway 2a Hydraulic jack 3 Hoistway pit 4a Float switch for hoistway pit 4b Float switch for machine room 5 Machine room 7 Oil tank 9a Motor of hydraulic power unit 9b Pump of hydraulic power unit 10a, 10b Normal electromagnetic valves 13a, 13b, 13c Drainage solenoid valve 14a Pit water absorption pipe 14b Machine room water absorption pipe 15 Drainage pipe 16a Elevator pit strainer 16b Machine room strainer 17 Return solenoid valve 18 Return pipe 19 Waste oil tank

Claims (3)

[Claims] 1. A hydraulic jack provided on a hoistway for raising and lowering a car, a pump connected to the hydraulic jack via a pipe, an oil tank connected to the pump via a pipe, and In a hydraulic elevator including a normal electromagnetic valve provided in the front and rear pipes, water is accumulated in the machine room where the oil tank and the pump are installed or in the pit below the hoistway in the machine room or the pit. Is provided, and when this detecting means operates,
A hydraulic elevator comprising a draining means for closing the solenoid valve in normal time and activating a pump to discharge water in a machine room or a hoistway to the outside by activating the pump. 2. A suction pipe provided in a machine room or a pit is connected to a suction pipe between the pump and the normal solenoid valve, and a discharge pipe between the pump and the normal solenoid valve is connected to a suction pipe. 2. The hydraulic elevator according to claim 1, further comprising a drain pipe connected to the outside, and a drain solenoid valve that is opened when the detecting means is operated, the water suction pipe and the drain pipe. 3. A waste oil tank is provided, and a pipe having a return solenoid valve which is opened at the time of return is connected between the waste oil tank and the discharge side pipe. Normally open the solenoid valve and the return solenoid valve,
2. The hydraulic elevator according to claim 1, wherein the pump is started to discharge water in the pipe.