JP5006892B2 - Oil leak detection device - Google Patents

Description

  The present invention relates to an oil leak detection device in a predetermined area, particularly in a machine room.

  Conventionally, oil leaks from a boiler in a machine room, for example, a boiler room, and a fire due to this oil has occurred, or an accident has occurred in which oil flows into a river or the sea. In general, the machine room is used to treat the water when the floor of the room is washed away, the water leaked from the water storage tank in the case of a boiler room, and the drainage water for regular water exchange in the water storage tank. There is a drainage section that leads to the sewer, and oil that flows out of the machine room through this drainage section flows into the river or the sea.

  In order to detect oil leakage in the boiler chamber in advance, for example, an oil leakage detection system (hereinafter referred to as a conventional example) disclosed in JP-A-7-234169 has been proposed.

  This conventional example includes an oil receiver disposed in a lower position of a boiler in a machine room, an oil leak sensor that is mounted in the oil receiver and detects leaked oil, and the oil leak sensor. It consists of an oil leak detector that operates based on detection and an oil shut-off valve that is interposed in an oil supply line that supplies oil to the boiler and that is controlled by a signal from the oil leak detector. When oil leaks, the oil supply to the boiler is stopped via the various mechanisms described above to prevent oil leakage.

JP-A-7-234169

  By the way, oil leaks in the boiler chamber are various when leaking due to a boiler failure, when leaking due to aging of the oil hose connecting the boiler and the oil tank, when leaking due to human error such as insufficient tightening of the oil hose, etc. However, in practice, this oil leakage often leaks in a state where a small amount of oil gradually oozes out.

  However, the conventional example has a structure in which a certain amount of oil falls and collects in the oil receiver and can be detected only by touching the oil leak sensor, so it is extremely difficult to detect this slightly leaked oil. Has not been able to cope with the oil leak at an early stage.

The present invention is, off solution the above-mentioned problems, provides a breakthrough oil leakage detecting device which exhibits effects unprecedented.

  The gist of the present invention will be described with reference to the accompanying drawings.

An oil leakage detection device for detecting oil leakage in a steam boiler chamber 1 in which a steam boiler 8 is installed , wherein a floor portion on which the steam boiler 8 is installed is set to an inclined floor portion 1a, and the inclined floor portion 1a The drainage unit 2 is continuously provided, and the water W flowing through the inclined floor portion 1 a is configured to be introduced into the drainage unit 2, and the steam mixed in the water W introduced into the drainage unit 2 the oil separation unit 3 for separating the oil X leaking from the boiler 8 and the water W, an oil detecting portion 5 for detecting the oil X, possess a notification unit 6 notifies the detection of the this oil X, The oil separation unit 3 is provided with through holes at different heights on the opposing wall surface of the drainage storage unit 3 ′, and the through hole at a higher position among the through holes constitutes the drainage unit 2. The upstream pipe member 2A is connected to be configured as the introduction portion 3A, and the through hole at the low position is A downstream pipe member 2B constituting the drainage part 2 is connected to be configured as a lead-out part 3B, and the downstream pipe member 2B projects into the drainage storage part 3 ′ and bends downward. The oil detection unit 5 is configured to float the oil X on the water surface at a position below the through hole at the high position, and the oil detection unit 5 detects the oil X floating on the water surface in the drainage storage unit 3 ′. Further, the oil detection unit 5 is a capacitance type sensor, and is related to an oil leak detection device.

The oil leakage detection device according to claim 1 , wherein a rainwater supply unit 7 that supplies rainwater to at least one of the drainage unit 2 and the oil separation unit 3 is provided. It is.

The oil leakage detection device according to any one of claims 1 and 2, wherein the drainage storage section 3 'is provided with an opening / closing lid 3b. .

Moreover, the oil leak detection apparatus of any one of Claims 1-3 WHEREIN: The said waste_water | drain accommodation part 3 'comprised the resin-made case body, It concerns on the oil leak detection apparatus characterized by the above-mentioned.

Moreover, the oil leak detection apparatus according to any one of claims 1 to 4, wherein the upstream pipe member 2A and the downstream pipe member 2B are made of synthetic resin. Is.

Since the present invention is configured as described above, unlike the above-described conventional example, even a small amount of leaked oil can be reliably detected, and therefore, it can be handled at an early stage of oil leakage. It will be an epoch-making oil leak detection device that demonstrates unprecedented effects, such as preventing fires caused by leaked oil and oil spills into rivers and the sea .

It is use condition explanatory drawing of a present Example . It is a schematic operation | movement explanatory drawing of the principal part which concerns on a present Example . It is a schematic operation | movement explanatory drawing of the principal part which concerns on a present Example . FIG. 6 is a perspective view showing another example of the oil separation unit 3. It is a formula which shows the principle of a capacitance type sensor. It is a use condition explanatory view of another example .

  An embodiment of the present invention which is considered to be suitable will be briefly described with reference to the drawings showing the operation of the present invention.

For example , when the oil X leaks from the equipment in the steam boiler chamber 1, the oil X flows into the water W flowing through the inclined floor portion 1 a of the steam boiler chamber 1 and flows into the drainage portion 2 .

Water W flowing through the water discharge section 2 of this is recovered by the oil separator unit 3, the recovered water W or al the water W oil X, which is mixed in is separated, the water W from the oil separator 3 Only discharged.

The oil X separated from the water W by the oil separation unit 3 is detected by the oil detection unit 5. At this time, even if the amount of the oil X separated from the water W in the oil separation unit 3 is small, the oil X is layered and floats and spreads on the water surface. For example, the oil detection unit 5 (sensor) If the oil is arranged on the water surface, the oil X can be reliably touched and the oil X can be reliably detected.

The notification unit 6 notifies that the oil X is detected by the oil detection unit 5. After confirming the oil leakage, the oil X in the oil separation unit 3 may be recovered using an oil adsorbent or the like.

Therefore, unlike the conventional example described above, even in small quantities leaked oil X is can be reliably detected, and thus, since that will be compatible at an early stage of oil leakage, the leakage oil X in thus caused fire In addition, oil spills into rivers and seas can be prevented.

The present invention also treasure adopts an electrostatic capacitance type sensor as an oil detection unit 5, because it is very precise detection device capable, be reliably detected water W or we separated oil X it can.

  By the way, the capacitance type sensor is a device capable of detecting with extremely high accuracy as described above, but on the structure thereof (on the structure for detecting a substance by using a difference in dielectric constant depending on the substance) If the target substance is not clear, the detection accuracy is significantly reduced.

Specifically, for example, when the surfactant of the oil X is mixed, the dielectric constant becomes a value close to that of the water W, and the oil X may not be detected. Therefore, even if this electrostatic capacity type sensor is provided in, for example, a final tank (for example, a sewer into which domestic wastewater flows) in which various substances are mixed, its function cannot be sufficiently exhibited.

In this regard, the present invention is targeted for detecting the water W drainage unit 2 Ru stream is continuously provided to the steam boiler chamber 1, because various substances detects a not water W such mixed as much as possible, It is optimal for installing a capacitive sensor, and its functions can be reliably demonstrated. Moreover, the capacitive sensor has a simple structure and is excellent in cost performance. This also contributes to cost reduction in the entire apparatus .

Also, as in the invention of claim 2 Symbol placement, drainage unit 2, the case in which the rainwater supplying unit 7 for supplying rainwater to at least one of the oil separating unit 3, only the waste water from the steam boiler chamber 1 However, by supplying rainwater, the water level of the water W in the oil separation unit 3 can be maintained in a certain state suitable for detection, and good detection can always be performed.

It will be described with reference to FIGS. 1-4 with a specific embodiment of the present invention.

The present embodiment is an oil leak detection device that detects oil leaked in the machine room 1 and is provided in the drainage part 2 connected to the machine room 1 and collects all drainage flowing through the drainage part 2. , an oil separation unit 3 for separating oil mixed in the recovered water W or al the water W, an oil detecting portion 5 for detecting the oil, and a notification unit 6 notifies the detection of the oil Have.

Specifically, machine room 1, in existing buildings for housing the oil supply tank 9 for supplying oil to a steam boiler 8 and the vapor boiler 8 as the device as shown in FIG. 1 (a steam boiler chamber) is there. Marks Nos. 4 is a refueling hose connecting the boiler 8 and the oil tank 9.

Also, the machine room 1 floor part 1a is provided slightly inclined, drainage portion 2 is provided on the inclined bottom position of the floor portion 1a.

  As shown in FIG. 1, the drainage unit 2 is configured by embedding a suitable synthetic resin pipe member in the ground, and one end portion is connected to the floor portion 1 a of the machine room 1 and the other end portion. Is connected to a sewer (not shown). The pipe member is not limited to synthetic resin, and may be made of concrete or metal.

  Further, the drainage unit 2 is provided with a rainwater supply unit 7.

  As shown in FIG. 1, the rainwater supply unit 7 has an existing raindrop structure including an eave fence 7 a provided on the roof 1 b of the machine room 1 and a fence 7 b connected to the eave fence 7 a and draining rainwater. The lower end portion of the trough 7b is connected to a predetermined position of the drainage unit 2 and a position upstream of the position where the drainage unit 2 is connected to an oil separation unit 3 described later.

  Accordingly, the rainwater supplied from the rainwater supply unit 7 passes through the drainage unit 2 and is supplied to the oil separation unit 3, which contributes to keeping the water level of the oil separation unit 3 constant, The reason why the roof 1b of the machine room 1 is used as a part for collecting rainwater in the rainwater supply unit 7 is that it is economical because impurities such as oil do not enter as much as possible.

  In the present embodiment, the dredger 7b associated with the rainwater supply unit 7 is connected to the drainage unit 2, but may be connected to the oil separation unit 3.

  In the present embodiment, the target is the boiler chamber 1 as described above. However, the boiler 8 (steam boiler) installed in the boiler chamber 1 discharges water continuously or intermittently due to its function. Done.

  Specifically, in this steam boiler, the draining operation is performed continuously or intermittently during the blowing process (a process of draining water of about 10% of the evaporation amount) for maintaining the water quality in the boiler 8. Further, the steam boiler is provided with a water softening device for softening water (removing Ca and Mg) supplied to the steam boiler, and processing for maintaining the performance of the water softening device (cleaning of ion exchange resin). ) Is also drained.

  Accordingly, drainage is continuously or intermittently performed from the boiler 8 and the water softening device connected to the boiler 8, and the water level of the oil separation unit 3 is always kept constant by the drainage flowing through the drainage unit 2. In addition, this drainage also exhibits the effect of flowing the oil X to be detected that has fallen to the floor portion 1a in the boiler chamber 1 to the drainage portion 2, and has an extremely efficient structure. I can say that.

  The oil separation unit 3 has a specific gravity difference separation region S by partitioning a region between the introduction unit 3A and the lead-out unit 3B with a partition wall 3a in a drainage storage unit 3 ′ including the introduction unit 3A and the lead-out unit 3B. It is the structure which provided.

  Specifically, the drainage storage unit 3 ′ is a resin case body embedded in the ground as shown in FIG. 2, and the drainage storage unit 3 ′ has opposite wall surfaces at different height positions. The through holes are provided, and each of the through holes is configured as an introduction portion 3A and a lead-out portion 3B to which the pipe members (upstream side pipe member 2A and downstream side pipe member 2B) constituting the drainage part 2 are connected. ing.

  Further, the downstream side pipe member 2B connected to the lead-out part 3B is bent downward in the drainage storage part 3 ′, and the distal end opening of the downstream side pipe member 2B is formed on the upstream side pipe member 2A. It is arranged at a position lower than the tip opening, and the tip of the downstream pipe member 2B functions as a partition wall 3a that forms a specific gravity difference separation region S.

Accordingly, the water W introduced from the introduction part 3A passes through the distal end opening of the downstream side pipe member 2B that opens below the drainage storage part 3 ′ and is led out from the lead-out part 3B. parts so that only heavy water W specific gravity provided specific gravity difference separation region S is derived from the deriving unit 3B in 3 '. Reference numeral 3b is an open / close lid, and 10 is a filter.

Further, as shown in FIG. 4, the oil separation unit 3 includes a plurality of first plates 11A that rise from the bottom plate 2a and form a water reservoir in the middle of the drainage unit 2 (in this case, for example, a U-shaped groove). As a configuration in which a circulation portion 14 is formed between the first plate 11A and the bottom plate 2a, and a second plate 11B whose upper edge is located above the upper edge of the first plate 11A is arranged in parallel. may, in this case, functions as a partition wall second plate 11B forms a specific gravity difference separation regions S mentioned above, therefore, only the water W passes through the circulation unit 14 the drainage section 2 (downstream Flows through the tube member 2B).

  An oil detection unit 5 is provided in the specific gravity difference separation region S of the oil separation unit 3.

  In the present embodiment, a constant water level type capacitive sensor is employed as the oil detector 5.

  The capacitance type sensor 5 can detect a substance by using a difference in dielectric constant depending on the substance, and as shown in FIG. 2, an insulating portion 5a disposed in the middle of the electrode rod 5A. Is a well-known structure including a distal electrode portion 5b (measuring electrode) and a proximal electrode portion 5c (earth electrode).

This constant water level type capacitive sensor is based on the principle shown in FIG. 5 and uses the change in ε _S (dielectric constant of the sensor contact portion) while keeping the liquid level (S / L) constant. By doing so, the difference between the water W and the oil X is detected. In this sense, this embodiment is optimal for the structure that keeps the water level constant.

  In the present embodiment, the electrode rod 5A related to the capacitance type sensor 5 is suspended via an appropriate means (not shown) above the drainage storage portion 3 ′, and the tip side electrode portion 5b is provided. It is comprised so that it may distribute | arrange in the water in the oil separation part 3 (specific gravity difference separation area | region S).

That is, the condition that the tip side electrode portion 5b of the electrode rod body 5A is immersed in the water W is set to be normal. In this tip side electrode portion 5b, between the base end side electrode portion 5a detecting touching the preset dielectric constant different substances (oil that different water W X) and abnormal, that transmits the information (abnormality of the oil X is mixed in water W) to the notification unit 6 Become.

  Further, in this embodiment, the explosion-proof treatment is performed by coating the surface of the electrode rod body 5A related to the capacitive sensor 5 with an appropriate member (for example, a fluororesin or a polyurethane resin).

  Therefore, it is possible to prevent oil from being ignited or the like in an apparatus that detects by flowing electricity.

  In this embodiment, AC (alternating current) is used for the operation of the capacitive sensor 5.

  This is to prevent the sensor from becoming an electrode due to electrolysis and corroding, which is caused by using DC (direct current).

  As shown in FIG. 2, the notification unit 6 is connected to the oil detection unit 5, and is provided with a warning sound unit 6 a that receives a signal transmitted from the oil detection unit 5 and makes a sound, and a warning lamp 6 b that emits light. ing.

  Reference numeral 6 c denotes an operation unit that operates the control of the notification unit 6.

  The operation of the oil leakage detection apparatus according to this embodiment having the above-described configuration will be described.

  For example, when the oil X leaks from the boiler 8 in the boiler chamber 1, the oil X falls on the floor portion 1 a of the boiler chamber 1 and flows into the water W flowing through the floor portion 1 a and flows into the drainage portion 2. The water W flowing through the floor portion 1a is water that has been washed away from the floor portion 1a in the boiler chamber 1 as described above, water leaked from the water storage tank, or drainage for periodic water exchange in the water storage tank. However, water that is intentionally run for the purpose of checking for oil leaks may be used.

  All of the water W flowing through the drainage unit 2 is collected by the oil separation unit 3, and the oil X mixed in the water W is separated from the collected water W in the specific gravity difference separation region S. Only the water W that has passed through the distal end opening of the downstream pipe member 2B of the drainage part 2 is discharged.

  The oil X separated from the water W by the oil separation unit 3 is detected by the oil detection unit 5 (capacitance type sensor). At this time, the oil X is layered, for example, floats on the water surface, spreads reliably, and touches the front end side electrode portion 5b of the capacitive sensor 5 and an abnormality is detected.

  When the oil X is detected by the oil detection unit 5, information on the detection of the oil X is sent to the notification unit 6 and notified.

  Thereafter, oil leakage is visually confirmed, and the oil X in the oil separation unit 3 is recovered using the oil adsorbent 12 or the like (see FIG. 3).

  Therefore, according to the present embodiment, unlike the above-described conventional example, it is possible to reliably detect even a small amount of leaked oil, and as a result, it is possible to respond at an early stage of the oil leak. Fires caused by oil and oil spills into rivers and seas can be prevented. Moreover, since the structure is simple, it can be installed in the drainage part 2 of the existing machine room 1 simply and at low cost.

Moreover, since the present Example employ | adopted the electrostatic capacitance type sensor as the oil detection part 5, even if the quantity of the oil X is small, it can detect accurately and reliably, and since it is a simple structure, Cost is low. In this respect, in this embodiment, the construction for the drainage part 2 of the existing machine room 1 can be performed very simply and at a low cost.

Further, in this embodiment, the oil separation unit 3 is divided into a drainage storage unit 3 ′ having an introduction unit 3A and a lead-out unit 3B. The specific gravity difference separation region S is partitioned and the oil detection unit 5 is arranged in the specific gravity difference separation region S. Therefore, the water W and the oil X can be separated well, and the amount of the oil X Even a small amount can be reliably detected.

Moreover, since the oil detection part 5 is comprised so that the oil which floats on the surface of the water of the specific gravity difference isolation | separation area | region S may be detected in a present Example, it is simple and reliable using the specific gravity difference of the water W and the oil X. The merit (the oil X floats on the water W ) of the separation means can be effectively used, and the oil X can be reliably detected at an early stage without causing the oil X to flow downstream.

Moreover, since the rain water supply part 7 which supplies a rainwater to at least one of the drainage part 2 and the oil separation part 3 was provided in the present Example, not only the waste water from the machine room 1, but also an oil separation part by supplying rainwater. The water level of the water W in 3 can be maintained in a certain state suitable for detection, and good detection can always be performed .

6, various machines 13 for handling oil roof 1c of the machine械室1 (eg emergency generators, hot and cold water generator, kerosene air conditioning, etc.) if is installed, the oil leakage from these various machines 13 This is a case where it can be detected.

  Specifically, as shown in FIG. 6, water (rainwater, etc.) flowing through the floor 1d of the roof 1c of the machine room 1 is transferred to the drainage part 2 using the rainwater supply part 7 (rain gutter structure) described above. It is configured to flow.

Therefore, in the unlikely event that oil X leaks from various machines 13 installed on the rooftop 1c, the oil X passes through the rainwater supply unit 7 together with, for example, rainwater, flows into the drainage unit 2, and is collected in the oil separation unit 3. And detected by the oil detector 5.

Note that the present invention is not limited to this embodiment, and the specific configuration of each component can be designed as appropriate .

W water
X oil 1 steam boiler room
1a Inclined floor part 2 Drainage part
2A upstream pipe member
2B downstream pipe member
2B ' pipe part 3 oil separation part 3' drainage storage part 3A introduction part 3B lead-out part 3a partition wall
3b Open / close lid 5 Oil detection unit 6 Notification unit 7 Rainwater supply unit

Claims (5)

An oil leakage detection device for detecting oil leakage in a steam boiler chamber in which a steam boiler is installed , wherein the floor portion on which the steam boiler is installed is set to an inclined floor portion, and a drainage portion is provided on the inclined floor portion. The water that is continuously provided and flows through the inclined floor portion is introduced into the drainage portion, and oil leaked from the steam boiler mixed in the water introduced into the drainage portion is separated from the water . an oil separating unit, possess an oil detector for detecting the oil, and a notification unit for notifying the detection of the this oil, the oil separation unit, different heights in the opposed wall surfaces of the drainage housing part A through hole is provided at a position, and among the through holes, a through hole at a higher position is configured as an introduction portion by connecting an upstream pipe member constituting the drainage portion, and a through hole at a lower position is configured as the drainage The downstream pipe members that make up the section are connected to form a lead-out section. The downstream pipe member is provided with a pipe portion that protrudes into the drainage storage portion and bends downward, and is configured to float oil on the water surface at a position below the through hole at the high position. The detection part is comprised so that the oil which floats on the said water surface in the said waste_water | drain storage part may be detected, Furthermore, the said oil detection part is an electrostatic capacitance type sensor, The oil leak detection apparatus characterized by the above-mentioned . The oil leak detection device according to claim 1 , further comprising a rainwater supply unit that supplies rainwater to at least one of the drainage unit and the oil separation unit. The oil leak detection apparatus according to any one of claims 1 and 2, wherein the drainage storage part is provided with an opening / closing lid. The oil leak detection apparatus according to any one of claims 1 to 3, wherein the drainage storage part is formed of a resin case body. The oil leak detection apparatus according to any one of claims 1 to 4, wherein the upstream pipe member and the downstream pipe member are made of synthetic resin.

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