JPH07234169A - Oil leakage detection system - Google Patents

Abstract

PURPOSE:To stop the supply of oil fuel by rapidly detecting the leakage of oil from a device using or handling oil fuel. CONSTITUTION:The title system consists of an oil pan/placed on a lower part of a device for using or handling oil fuel, an oil leakage sensor 2 mounted inside the oil pan 1 for detecting leakage oil collected in the oil pan 1, an oil leakage detector 3 operating based on the detection of the oil leakage sensor 2, and a stop valve 4 provided at an oil fuel supply line for supplying oil to the above device and controlled by a signal from the oil leakage detector 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device using oil fuel such as kerosene, light oil and heavy oil and a device handling oil fuel, such as an oil burner and oil used in a hot water boiler, a steam boiler, an absorption refrigerating machine and the like. The present invention relates to an oil leakage detection system that detects oil leakage from an oil fuel supply line or the like that supplies oil to an oil tank that stores fuel, an oil burner, and the like, and stops the supply of oil fuel.

[0002]

2. Description of the Related Art Generally, an oil burner such as a hot water boiler or a steam boiler that uses an oil fuel such as heavy oil is composed of an oil nozzle, an oil pump, a blower, an oil cutoff valve, a flexible tube, etc. Is supplied to the oil nozzle via an oil pump, an oil fuel supply line, etc., and is sprayed from the oil nozzle into the furnace.

[0003]

By the way, in an oil burner that uses oil fuel, an oil tank that handles oil fuel, an oil fuel supply line, and the like, an oil burner or the like may be used due to usage conditions, usage period, equipment damage, or the like. There was a case where oil leaked from the connecting parts of each of the components. In this case, various harmful effects such as causing a fire or causing pollution by flowing into a river have been brought about.

In order to eliminate these adverse effects, maintenance of the oil burner, the oil fuel supply line, etc. should be carried out frequently to prevent oil leakage as much as possible. However,
It is practically difficult to completely prevent the oil leakage from the oil burner and the like, and if the number of maintenance increases, another problem such as an increase in cost will occur.

Further, in order to eliminate fire and pollution due to oil leakage, a leakage detection device for detecting oil leakage is installed in an oil burner or the like, and the oil leakage detection device promptly detects oil leakage, and the oil burner is used. The oil supply to the machine should be stopped. However, in the past, a small and inexpensive device for detecting oil leakage and stopping oil supply has not yet been proposed, and its development is strongly requested.

In view of the above situation, the present invention provides an oil leakage detection system which detects the leakage of oil from a device that uses oil fuel or a device that handles oil fuel and stops the supply of oil fuel. It is intended to be provided.

[0007]

In order to achieve the above object, an oil leakage detection system of the present invention comprises an oil receiver arranged below a device using oil fuel and a device handling oil fuel. An oil leak sensor that is installed in the receiver and detects oil that leaks into the oil receiver, an oil leak detector that operates based on the detection of the oil leak sensor, and an oil fuel supply line that supplies oil to the device. And an oil cutoff valve which is installed and controlled by a signal from the oil leak detector. The oil leakage sensor is composed of a protective cylinder having a cutout for oil inflow, a sensor element fixed in the protective cylinder, and a holder that is detachably attached to the oil receiver and holds the protective cylinder in a removable manner. Has been done.

[0008]

When the oil leaks from a device that uses oil fuel or a device that handles oil fuel, the oil is received by the oil receiver located below the device. When oil accumulates in the oil pan,
The oil flows into the protective cylinder through the cutout portion of the protective cylinder, and the sensor element in the protective cylinder is immersed in the oil. As a result, the oil leak sensor detects the oil leak and the oil leak detector operates.
When the oil leak detector operates, a signal is transmitted to the oil cutoff valve provided in the oil fuel supply line to control the oil cutoff valve to close. This will stop the oil supply to the equipment,
Oil leakage is prevented. As a result, it is possible to prevent a secondary disaster such as a fire caused by oil leakage. Note that the oil leak sensor has a structure in which the protective cylinder can be removed from the holder and only the sensor element part can be replaced with a new one when the sensor element is immersed in oil or deteriorated due to aging etc. Can be replaced easily and easily.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a schematic system diagram in which an oil leakage detection system according to an embodiment of the present invention is installed in a horizontal small boiler such as a hot water boiler or a steam boiler.
It is composed of an oil receiver 1, an oil leak sensor 2, an oil leak detector 3, an oil cutoff valve 4, etc., and detects an oil leak from an oil burner 6 installed on one end side wall of the boiler body 5, and detects the oil burner 6 It is designed to stop the supply of oil to.

As shown in FIG. 2, the oil burner 6 is composed of an oil nozzle (not shown), an oil pump 7 such as a gear pump or a screw pump, a blower 8 and a flexible tube 9, and the like. The oil O supplied from the tank to the oil burner 6 via the pipe 10 or the like is sprayed from the oil nozzle into the furnace of the boiler body 5. Also, the boiler body 5
A control board 11 for controlling the oil burner 6 is attached to one end side wall of the.

The oil receiver 1 is formed of a steel plate or the like into a substantially rectangular dish shape having an appropriate depth, and is arranged below the oil burner 6. The size of the oil receiver 1 is set so that the oil leaked from each component of the oil burner 6 can be reliably received.

The oil leak sensor 2 is detachably attached to the oil receiver 1 and detects oil leaking from the oil burner 6 and accumulated in the oil receiver 1. In the present embodiment, the oil leak sensor 2 is, as shown in FIGS. 3 and 4,
Protective cylinder 12 having a notch 12a for oil inflow at the lower end
The sensor element 13 fixed with resin or the like in the protective cylinder 12 and at a position apart from the lower end of the protective cylinder 12 by a resin, and detachably attached to the side wall 1a of the oil receiver 1 with bolts 15. And a holder 14 which holds the oil tank 1 on the bottom wall 1b of the oil receiver 1 in an upright posture and detachably. As the sensor element 13, for example, a conductive fluorine resin or the like is used. In addition, the holder 14 is a protective cylinder 12
Is equipped with a pair of holding pieces 14a for holding the outer peripheral surface of the
By operating the adjusting screw 16 screwed into both the holding pieces 14a, the protection cylinder 12 is held or the protection cylinder 12 is held.
The holding state of the can be released. The level of the sensor element 13 is such that the sensor element 13 is fixed inside the protective cylinder 12, so that the lower end of the protective cylinder 12 is placed in the oil receiver 1.
To contact the bottom wall 1b of the
Is determined by holding the oil receiver 1 in a standing posture. When the oil leak sensor 2 is attached to the oil receiver 1, and the distance L between the sensor element 13 and the bottom wall 1b of the oil receiver 1 is too small, the oil leak sensor can detect an oil leak during maintenance and inspection of the oil burner 6. If 2 operates and conversely the interval L is too large, detection will be delayed even if oil actually leaks from the oil burner 6. Therefore, the sensor element 13 and the oil receiver 1
The distance L from the bottom wall 1b is set to a size that can ensure safety in accordance with the structure of the oil burner 6, the amount of combustion, etc. When an actual oil leak is detected, this is quickly detected to ensure operation. It is supposed to be.

FIGS. 5 and 6 show another embodiment of the oil leak sensor 2. In the oil leak sensor 2, the protective cylinder 12 is detachably connected to the connector 19, and these are detached by the holder 14. It is designed so that it can be held freely, and the other structure is similar to that of the above-mentioned embodiment.

The oil leak detector 3 is attached to the side wall of the boiler main body 5, and is connected to the control panel 11, the oil leak sensor 2 and the oil cutoff valve 4 described later through the lead wire 17, and the oil leak sensor When the oil leak detector 2 detects the oil leak, the oil leak detector 3 sends a signal to the oil shutoff valve 4 to drive and control the oil shutoff valve 4. Further, the oil leak detector 3 is configured so that when the oil leak sensor 2 detects an oil leak, it also sends a signal to the control panel 11 to stop the operation of the oil burner 6. Further, although not shown, the oil leak detector 3 is provided with a switch for adjusting the sensor sensitivity. Therefore, even if the sensor element 13 of the oil leak sensor 2 deteriorates due to aging or the like and it becomes difficult to detect the oil leak, the sensitivity of the oil leak detector 3 can be increased by operating the sensor sensitivity adjustment switch. This makes it possible to reliably detect oil leakage. As the oil leak detector 3, for example, a leak sensor OD-B1-T manufactured by Takuma Co., Ltd. is used.

The oil cutoff valve 4 is interposed in an oil fuel supply line for supplying the oil O to the oil burner 6, and is closed by a signal from the oil leak detector 3 to supply the oil to the oil burner 6. The drive is controlled to stop. In this embodiment, the oil cutoff valve 4 is a solenoid valve having the same structure as that of a conventionally known one, and the solenoid valve is provided between the flexible tube 9 and the pipe 10.

Next, the operation of the oil leak detection system will be described. The oil O in the oil tank is supplied to the oil burner 6 via the oil pump 7, the oil fuel supply line, etc., and is used for combustion in the furnace.

When the oil leaks from each component of the oil burner 6 due to the usage conditions, the usage period, etc., the oil is received by the oil receiver 1 arranged below the oil burner 6.

When the oil is accumulated in the oil receiver 1, the oil flows into the protection cylinder 12 through the notch 12a of the protection cylinder 12, and when the oil level further rises, the sensor element 13 is immersed in the oil. . As a result, the oil leak sensor 2 detects the oil leak, and the oil leak detector 3 operates.

When the oil leak detector 3 operates, the oil shutoff valve 4
To the control panel 11 to stop the operation of the oil burner 6 as well as to control the drive so that the oil cutoff valve 4 is closed. As a result, the supply of oil to the oil burner 6 is stopped and a large amount of oil is prevented from leaking. As a result, it is possible to reliably prevent a secondary disaster such as a fire caused by an oil leak. Further, since the leaked oil is stored in the oil receiver 1, post-processing of the oil can be easily and easily performed.

If the sensor element 13 is immersed in oil or deteriorated due to aging, the holder 14
The protective cylinder 12 is removed from the sensor cylinder 12, and the sensor element 13 is replaced with a new one for each protective cylinder 12. At this time, the holder 14
Since the oil can be removed from the oil receiver 1 and the protective cylinder 12 is also detachably held by the holder 14, the sensor element 13 can be replaced easily and easily. In particular, in the oil leak sensor 2 shown in FIGS. 5 and 6, since the protective cylinder 12 is detachably connected to the connector 19, the sensor element 13 can be replaced more easily and easily.

FIG. 7 is a schematic system diagram in which the oil leakage detection system of the present invention is installed in a vertical small boiler. The oil leakage system is the same as that of the above-mentioned embodiment, the oil receiver 1, the oil leakage sensor. 2, the oil leak detector 3, the oil cutoff valve 4, etc., and the oil receiver 1 is arranged below the boiler body 5. Also in this case, the same operational effects as those of the above-described embodiment can be obtained. In addition, in FIG.
5 is a boiler body, 6 is an oil burner, 7 is an oil pump, 10 is piping, and O is oil.

FIG. 8 shows an oil leakage detection system of the present invention installed near the oil tank 18 to detect leakage of oil O from the oil tank 18 and a portion of the pipe 10 connected to the oil tank 18. The oil leak detection system includes an oil receiver 1, an oil leak sensor 2, an oil leak detector 3, an oil cutoff valve 4 and the like, as in the above-described embodiment. The oil tank 18 is arranged in the. Also in this case, the same operational effects as those of the above-described embodiment can be obtained.

In the above embodiment, when the oil leak is detected, the oil cutoff valve 4 is closed to stop the oil supply. However, in other embodiments, the oil leak is prevented. Upon detection, the oil cutoff valve 4 may be closed to stop the oil supply, and a signal from the oil leak detector 3 may be sent to the monitoring room or the like to notify the worker or the like of the oil leak. In this case, the worker can promptly perform appropriate processing against oil leakage.

[0024]

As described above, the oil leak detection system according to the present invention receives oil leaked from a device or the like that uses oil fuel at an oil receiver, and collects oil accumulated in the oil receiver with an oil leak sensor and an oil leak detection. The oil shutoff valve is closed by the signal from the oil leak detector to stop the oil supply. As a result, by using the oil leakage detection system of the present invention, it is possible to prevent a large amount of oil from leaking, and to prevent fires and outflows to rivers due to the leakage of oil without fail, improving safety, etc. Can be achieved. Further, since the oil leak detection system includes the oil receiver, the oil leak sensor, the oil leak detector, and the oil cutoff valve, the system itself can be made relatively compact and the cost can be reduced. Further, the oil leakage sensor is composed of a protective cylinder, a sensor element fixed in the protective cylinder, and a holder that detachably holds the protective cylinder so that the sensor element can be replaced with a new one for each protective cylinder. . As a result, even if the sensor element is immersed in oil or deteriorates due to aging,
The sensor element can be replaced easily and easily, which is extremely convenient.

[Brief description of drawings]

FIG. 1 is a schematic system diagram in which an oil leakage detection system according to an embodiment of the present invention is installed in a horizontal small boiler.

FIG. 2 is a partial perspective view of a horizontal small-sized boiler equipped with an oil leakage detection system.

FIG. 3 is an enlarged front view of an oil leak sensor used in the oil leak detection system.

FIG. 4 is an enlarged plan view of an oil leak sensor used in the oil leak detection system.

FIG. 5 is an enlarged front view showing another embodiment of the oil leakage sensor.

FIG. 6 is an enlarged front view of the oil leak sensor shown in FIG. 5 with a protective cylinder and a connector removed.

FIG. 7 is a schematic system diagram in which the oil leakage detection system according to the embodiment of the present invention is installed in a vertical small boiler.

FIG. 8 is a schematic system diagram in which an oil leakage detection system according to an embodiment of the present invention is installed near an oil tank.

[Explanation of symbols]

1 is an oil receiver, 2 is an oil leak sensor, 3 is an oil leak detector,
4 is an oil cutoff valve, 12 is a protective cylinder, 12a is a cutout of the protective cylinder,
13 is a sensor element and 14 is a holder.

Claims (2)

[Claims] 1. An oil pan (1) arranged at a lower position of a device that uses oil fuel or a device that handles oil fuel, and is installed in the oil pan (1) and leaks into the oil pan (1). Oil leak sensor (2) for detecting oil, and oil leak detector (3) that operates based on the detection of the oil leak sensor (2)
And an oil cutoff valve (4) which is interposed in an oil fuel supply line for supplying oil fuel to the device and which is controlled by a signal from an oil leak detector (3). Detection system. 2. An oil leakage sensor (2) comprising a protective cylinder (12) having a notch (12a) for oil inflow, and a protective cylinder (1).
2) The sensor element (13) fixed in the inside and the protective cylinder (1) which is detachably attached to the oil receiver (1).
The oil leakage detection system according to claim 1, wherein the oil leakage detection system is configured by a holder (14) that detachably holds 2).