JPH07140030A - Leaking-oil detecting apparatus - Google Patents

Abstract

PURPOSE:To obtain a leaking-oil detecting apparatus, which is attached to a bypass pipe for connecting each oil tank and can detect the leakage of oil from a gate valve. CONSTITUTION:A tubular frame 2 having flange-shaped fixing parts 1 and 1 for linking to a pipe, a leaking-oil detector 3, which is protruding to the inner surface side of the frame 2, an oil sump 4, which is formed in the frame 2, and a valve 5, which is provided at the oil sump 4, are provided. The height of the leaking-oil detector 3 can be changed. The outer surface of the leaking-oil detector can be covered with a protecting tube 7 in the inside of the frame 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil leakage detection device for preventing mixing of different oil species during cargo handling such as in a domestic tanker.

[0002]

2. Description of the Related Art In coastal tankers and the like, in order to reduce the work time when loading and unloading oil with shippers such as refineries,
Frequent loading of different oils at the same time using the base pump is increasing. Each oil tank in the ship is connected by a bypass pipe, and a sluice valve is formed in the bypass pipe. By closing the sluice valve, different kinds of oil are loaded and handled without being mixed in each oil tank.

[0003]

However, an accident in which oil leaks from the sluice valve due to human operation error or malfunction of the sluice valve itself (for example, deterioration of the sluice valve over time), and different types of oil are mixed with each other Is actually happening. If oil leaks from the sluice valve and different kinds of oil are mixed, the mixed oil must be re-refined, which increases the cost burden on the shipowner side. In addition, suspending or stopping the cargo handling causes a great deal of damage to the shipowner side, and the reliability of the shipper side is deteriorated.

The present invention has been made in order to solve the above problems, and can be attached to a bypass pipe connecting each oil tank, and can detect the leakage of oil from the gate valve. An object is to provide an oil detection device.

[0005]

In order to achieve the above object, the present invention provides a tubular frame having flange-like fixing portions at both ends for connecting to a pipe, and an inner peripheral side of the frame. It is characterized in that it has a protruding oil leak detector, an oil reservoir formed in the frame, and a valve provided in the oil reservoir. The oil leak detector may be adjustable in height. The outer circumference of the oil leak detector may be covered with a protective cylinder provided in the frame. The tip of the oil leak detector may be opposed to the oil sump. The oil leak detector may be raised from the bottom of the frame to the inner peripheral side.

[0006]

[Operation] Install an oil leak detection device near the gate valve of the bypass pipe. When the oil leaks from the sluice valve, the oil enters the cylindrical oil leak detection device and is detected by the oil leak detector. Based on this detection signal, take appropriate measures such as oil leakage prevention measures.

[0007]

EXAMPLE An example of an oil leakage detection device according to the present invention will be described below. In FIG. 1, flange-shaped fixing portions 1 and 1 for connecting to a pipe 7 are formed on both outer circumferences of a cylindrical frame 2. A concave oil sump 4 is formed in the lower center of the inner wall of the frame 2. The oil sump 4 has a convex projection on the outer wall side of the frame 2, and a valve 5 for draining oil to the outside is formed at the bottom.

The oil leak detector 3 is inserted from the outer side to the inner side of the cylindrical frame 2. The tip of the oil leakage detection device 3 faces an oil sump 4 formed in the lower portion of the frame 2. As shown in FIG. 2, the tip of the oil leak detector 3 is composed of a sensor portion 3a and a resin 3d that covers the outer circumference and the lower end surface of the sensor portion 3a. It is held by a bottom cylindrical holder portion 3c. A cable 3b is connected to the sensor portion 3a, and one end of the cable 3b extends to the outside of the frame 2 and is connected to a control board (not shown). Although the oil leak detector 3 having such a configuration is a method of detecting oil leak based on a change in electrostatic capacity, for example, an appropriate method such as an optical detection method may be adopted.

In FIG. 1, the oil leak detector 3 inserted inside the frame 2 receives pressure when the sluice valves 7 and 8 are opened and oil flows through the bypass pipe 7, so that the pressure is reduced. Therefore, the oil leak detector 3 is covered with a cylindrical protection cylinder 6. When an oil leak is detected at the tip of the oil leak detector 3, a detection signal is sent to an external control board by the cable 3b to notify the oil leak. Further, the height of the oil leak detector 3 in the frame 2 can be changed by a method such as operating an adjusting screw to finely set the detection level.

The pipe 7 to which the oil leak detection device having the above-mentioned structure is attached is, for example, a bypass pipe connecting one oil tank to another oil tank. A pair of sluice valves 8 and 9 are connected at a predetermined interval for shutting off communication between both oil tanks when the oil is stored. The frame 2 of the oil leak detection device is connected between the gate valves 8 and 9.

When different kinds of oil are stored in the oil tanks connected by the bypass pipe 7, the pair of sluice valves 8 and 9 are closed to disconnect the oil tanks from each other. However, if at least one of the sluice valves 8 and 9 malfunctions for some reason and oil leaks, the leaked oil is collected in the frame 2 of the oil leak detection device, and the oil leak detector 3 detects this. , Emits a signal. Take appropriate measures to prevent oil leakage based on this signal.

By using the oil leak detection device as described above, oil leaks from the sluice valves 8 and 9 can be detected at an early stage. Therefore, it is possible to prevent different oils from being mixed with each other. It is possible to prevent re-refining of oil and interruption and suspension of cargo handling. Since the oil leakage detection device has a unit type, it can be easily attached to the existing bypass pipe by the fixing portions 1 and 1. In this case, it is most preferable that the oil leak detection device is mounted near the gate valve 8 of the bypass pipe 7 so that the oil leak can be detected quickly.

Immediately after the oil is loaded in a refinery or the like, the oil may remain in the bypass pipe 7 even if there is no abnormality in the sluice valve 8. Such remaining oil is normally stored in the oil sump 4 and drained to the outside by the valve 5,
Malfunction of the oil leak detector 3 is prevented.

Further, since the height of the oil leak detector 3 in the frame 2 can be freely changed by the cable 2b, the amount of oil reacted by the oil leak detector 3 can be finely adjusted. For this reason, when it is not necessary to output the detection signal with the amount of oil leakage that is practically no problem, the oil leakage detector 3 may be adjusted to be high to increase the detection level. The malfunction of the container 3 can be eliminated. Further, in the above-described embodiment, the mounting position of the oil leak detector 3 is set to the position facing the oil sump 4 in the frame 2. However, the position is not limited to this, and any position that can accurately detect the oil leak may be used. . For example, as shown in FIG. 3, the oil leak detector 3 may be attached in a form in which it is raised from the bottom of the frame 2 to the inner peripheral side. A part of the oil leak detector 3 is surrounded by a protective cylinder 6. An oil sump 4 having a valve 5 is provided on the side of the oil leak detector 3.

[0015]

According to the present invention, a tubular frame having flange-shaped fixing portions at both ends for connecting to a pipe,
Since it has the oil leak detector protruding on the inner peripheral side of the frame, it is possible to detect the oil leak in the pipe, and it is possible to take appropriate measures based on this detection signal. Also, since it is unitized by the frame, it can be easily attached to existing piping. Furthermore, since the frame is provided with the oil sump and the oil sump is provided with the valve, oil that should not be detected can be drained from the valve, and erroneous detection operation can be prevented.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of an oil leak detection device according to the present invention.

FIG. 2 is a sectional view showing an example of an oil leak detector used in the oil leak detection device of the above.

FIG. 3 is a front view showing another embodiment of the oil leakage detection device according to the present invention.

[Explanation of symbols]

 1 Fixed part 2 Frame 3 Oil leak detector 4 Oil sump 5 Valve

Claims (5)

[Claims] 1. A cylindrical frame having flange-shaped fixing portions at both ends for connecting to a pipe, an oil leak detector protruding toward an inner peripheral side of the frame, and an oil sump formed in the frame, An oil leak detection device having a valve provided in an oil sump. 2. The oil leak detector according to claim 1, wherein the height of the oil leak detector is changeable. 3. The oil leakage detection device according to claim 1, further comprising a protective cylinder which is provided in the frame and covers an outer periphery of the oil leakage detector. 4. The oil leak detector according to claim 1, wherein the oil leak detector faces the oil sump. 5. The oil leak detector according to claim 1, wherein the oil leak detector stands up from the bottom of the frame to the inner peripheral side.