JPH1183720A - Viscosity detecting unit of fuel oil viscosity automatic adjusting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form an entire device compact by improving attaching condition of a capillary tube of a viscosity detecting means and to make handling easier by adding a function wherein a viscosity measuring system comprising the capillary tube is washed with no disassembly. SOLUTION: Relating to the viscosity detecting unit, a capillary tube 15 of a specified size is wound in spiral, pumps 10A and 10B which rotate synchronously are connected to an inlet side and an outlet side of the capillary tube 15, respectively, and so configured, for connection with the capillary tube 15, that a washing liquid flow-in tube 19 may be connected to an oil flow-in channel 17 while an oil flow-out channel 18 may be connected to a washing liquid discharge tube 19', on one pump side and on the other, between these pumps 10A and 10B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a fuel oil supplied to a diesel engine or a boiler burner by detecting the viscosity of the fuel oil and adjusting the amount of steam supplied to the fuel oil heater to keep the viscosity constant. The present invention relates to a viscosity detection unit in an automatic viscosity adjustment device.More specifically, a configuration in which the viscosity detection device is compact and can be cleaned without disassembling the main parts even during operation, and normal operation can be continued for a long time. The present invention relates to a viscosity detecting unit in a fuel oil viscosity automatic adjusting device.

[0002]

2. Description of the Related Art Conventionally, heavy fuel oil C has been generally used as fuel oil for medium and large-sized diesel engines and boilers. Since this C heavy oil has a high viscosity, it is necessary to supply it as fuel oil after adjusting the viscosity to a value suitable for the operation of a fuel injection valve of an engine part or a burner of a boiler. To this end, the viscosity is controlled by manipulating the amount of heating of a heater provided in the fuel oil supply line.

In order to control the viscosity of the fuel oil, an automatic fuel oil viscosity adjusting device is provided for measuring the viscosity in a fuel oil supply line and keeping the heating temperature of the fuel oil at an optimum value. And this fuel oil viscosity automatic adjusting device includes
Viscosity detecting means is incorporated, and the heating amount of the heater is controlled based on data detected by the viscosity detecting means.

As the viscosity detecting means in the automatic fuel oil viscosity adjusting device, a device incorporating a mechanism of a capillary type continuous viscometer which satisfies the Hagen-Poiseuille equation is employed. As the viscosity detecting means in such a fuel oil viscosity automatic adjusting device, there is one disclosed in, for example, Japanese Patent Publication No. 1-23055.

[0005]

Problems to be Solved by the Invention
No. 055), a capillary tube 101 as a main part for measuring the viscosity of oil is formed by a straight pipe as shown in FIG. And a capillary tube 10 of the required length
1 and pumps 102 and 103 arranged so as to be connected before and after the capillary tube 101,
The combination of the main body 105 for supporting them and the drive motor 106 of the pumps 102 and 103 attached to the main body 105 inevitably increases the overall shape. However, in recent years, it has become necessary to reduce the installation space for on-board equipment on ships as well and to make the equipment more compact overall, and therefore it is necessary to reduce the installation space for equipment as much as possible. It has become.

Further, in the viscosity detecting means 100 in the automatic fuel oil viscosity adjusting device, a capillary tube 101 having a very small inner diameter is used. Sludge adheres to the inner wall of the tube and narrows the conduit.
In this case, the viscosity detection value changes, making it difficult to measure the normal viscosity, making it impossible to automatically adjust the viscosity, causing the engine to become unstable or the burner to operate abnormally. Problems arise. for that reason,
Although the cleaning of the capillary tube is necessary, the entire structure must be disassembled and cleaned, so that there is a problem that the viscosity control of the fuel oil must be temporarily stopped to perform the temperature control operation.

Further, since the fuel oil supply pipe is incorporated in the fuel oil supply pipe, the air supply, connection pipe attachment / detachment, attachment / detachment attachment / detachment, etc. can be performed for the restoration of the fuel oil supply pipe accompanying disassembly and cleaning. It involves a lot of work. In addition, since the capillary tube, which is the main part, is an ultra-thin tube, ordinary means (such as immersion in a cleaning solution to release deposits, separation and removal with a thin metal rod, etc.) ) Cannot be easily cleaned, and it requires a lot of manual labor to perform them patiently. Therefore, cleaning cannot be performed in a short time. For this reason, in the case of a ship, if the operation of viscosity detection by the viscosity detection means as described above becomes abnormal during the voyage, the ship stays at the steady-state temperature condition and sails to the next port of call to call the port. There is inconvenience such as disassembling and cleaning the capillary tube, which is a main part of the viscosity detecting means, later.

SUMMARY OF THE INVENTION The present invention has been made in view of such a problem, and by improving the conditions for attaching a capillary tube in a viscosity detecting means, the whole apparatus is formed compact and the viscosity including the capillary tube is improved. It is an object of the present invention to provide a viscosity detecting unit in a fuel oil viscosity automatic adjusting device which is easy to handle by adding a function capable of cleaning without disassembling a system of a measuring unit.

[0009]

Means for Solving the Problems and Action / Effect In order to achieve the above-mentioned object, a viscosity detecting unit in the automatic fuel oil viscosity adjusting device according to the present invention comprises: A capillary tube having a required size is spirally wound, and pumps that rotate synchronously are respectively connected to an inlet side and an outlet side of the capillary tube. The capillary tube is connected to one of the pump side and the other pump side. The cleaning liquid pipe is configured to be connectable so as to communicate with the cleaning liquid pipe.

According to the present invention, by spirally winding the capillary tube, the space for disposing the capillary tube can be reduced. As a result, by aligning the drive shafts of the pumps disposed at the inlet and the outlet of the capillary tube and at least the winding axis of the capillary tube in the same direction, it is possible to reduce the size of the main body that houses these viscosity detection units. Thus, there is an effect that the size of the device can be reduced. Moreover, since the flow pipe of the cleaning liquid is connected to the capillary tube through each pump, it is possible to wash the oil flow section in the viscosity detection unit without decomposing, and even during the supply operation of the fuel oil. If the operation of the viscosity detection is interrupted, the essential parts of the viscosity detection unit can be cleaned in a short time, and the viscosity detection operation can be performed without stopping the operation for a long time.

In the present invention, it is preferable that the capillary tube is connected to an inlet side and an outlet side thereof so as to be fitted on an outer shell of a synchronously rotating pump.
With this configuration, the entire viscosity detecting unit can be reduced in size, and the viscosity detecting unit can be integrated coaxially with the drive motor of the pump, so that the installation space can be reduced. In particular, it is possible to use a vertical axis type. Further, it is preferable that the washing liquid pipe is connected to an inlet side and an outlet side of the capillary tube, and is connected to an inlet side of one of the pumps and an outlet side of the other pump among pumps which rotate synchronously. In this way, the washing liquid is fed by the operating force of the pump when washing the viscosity detecting section, and the oil viscosity detecting system can be washed.
In addition, the inside of the pump can be washed at the same time, and the function can be easily recovered without disassembling the main part.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a specific embodiment of a viscosity detecting unit in a fuel oil viscosity automatic control device according to the present invention will be described with reference to the drawings.

FIG. 1 is a partial sectional side view of one embodiment of a viscosity detector provided with a viscosity detection unit in a fuel oil viscosity automatic control device according to the present invention. In this figure, a viscosity detector 1 has a main body 2 incorporated in a fuel oil supply pipe formed in a straight pipe shape, and a central portion of the main body 2 is provided with a bonnet 3 covering an opening on an upper surface thereof. A double pump 10 (10A, 10B) is attached below the boss 4 provided to protrude inward. Also,
A capillary tube 15 for measuring viscosity is spirally formed and attached to the outer periphery of the pump 10. A manifold plate 5 is mounted on an upper portion of the bonnet 3, and a drive motor 7 of the pump 10 is mounted on the upper portion of the manifold plate 5 via a yoke 6.

The pump 10 is a gear pump having a shell 11 attached to the boss 4 of the bonnet 3 and pump gears in two pump chambers 12, 12 'arranged at a required interval. 12a and 12b are inserted through a shaft hole 8 provided through the center of the boss 4 and the manifold plate 5 and attached to an upper portion of the bonnet 6 by an output shaft of a drive motor 7 and a joint (neither is shown). It is attached to the lower end of the directly connected drive shaft 7a, and is configured to rotate synchronously as dual pumps 10A and 10B. In this embodiment, a trochoid gear pump is employed as a gear pump.

The capillary tube 15 is helically formed with dimensions set so that a predetermined differential pressure can be measured over its entire length, and is mounted so as to be wound around the outer periphery of the shell 11 of the pump 10. . As shown schematically in FIG. 2, the capillary tube 15 has one end connected to the discharge side 10a 'of the first pump 10A and the other end connected to the suction side 10b of the second pump 10B. It is not affected by disturbances such as pressure fluctuations in the supply line. Then, those first pumps 10A
Suction side 10a and the discharge side 10 of the second pump 10B.
b ′ is the bonnet 3 and the manifold plate 5
The fuel oil flow passages (the inflow passage 17 and the outflow passage 18) are connected to each other, and the fuel oil inflow passage 17 and the outflow passage 18 are provided in the main body 2 so as to open. . Note that a cover 16 is attached to the outside of the mounting portion of the capillary tube 15 (see FIG. 1), and is protected.

The discharge side 1 of the first pump 10A
0a 'and the suction side 10b of the second pump 10B, the pipes 13 branch from the inlet of the capillary tube 15 and the pipe 14 from the outlet of the capillary tube 15, respectively.
To the differential pressure transmitter 20 (see FIG. 3) so that each detected hydraulic pressure is transmitted. In addition, an inflow path 17 connected to the suction side 10a of the first pump 10A is provided with a cleaning liquid inlet pipe 19 branched from the inflow path 17 and connected to a discharge side 10b 'of the second pump 10B. The outflow channel 18 is branched from the outflow channel 18 and the cleaning solution discharge pipe 1
At the terminals of the cleaning liquid inlet pipe 19 and the cleaning liquid discharge pipe 19 ', for example, a check valve built-in joint (generally referred to as a coupler; not shown) is attached. Stop valves V1 and V2 are provided in a section from the branch of the cleaning liquid supply pipe 19 and the cleaning liquid discharge pipe 19 'to each opening of the fuel oil inflow path 17 and the outflow path 18, respectively.

As shown in FIG. 3, the viscosity detecting unit according to the present embodiment having the above-described configuration
The main body 2 of the viscosity detector 1 is incorporated and used within 0. In this case, the fuel oil flowing through the main body 2 from the inflow passage 17 for viscosity detection opened in the main body 2 (the fuel oil is heated to a required viscosity by the heater 31 provided in the supply pipe). ) Is sucked by the first pump 10A, and the input pressure pressurized by the first pump 10A and the pressure on the outlet side of the capillary tube 15 are changed by the differential pressure transmitting pipes 13 and 14 to the differential pressure. Transmitter 20
Is converted to an air signal proportional to the viscosity measurement range guided to the differential pressure transmitter 20 and transmitted to the viscosity controller 32 to display the viscosity of the fuel oil and to respond to the conditions set in advance. By controlling the steam control valve 33, the amount of steam for heating the fuel oil to the heater 30 is adjusted. In the figure, reference numerals 22 and 35 denote filter regulators, 23 and 34 denote pneumatic signal circuits, and 25 denotes a power switch box.

In the viscosity detecting unit of the present embodiment, the capillary tube 15 is wound around the outer periphery of the shell 11 of the pump 10 (10A, 10B) in the main body 2 of the viscosity detector 1. Without being protruded from the pump portion, it is compactly integrated in the central portion of the main body 2, so that the space occupied by the entire device can be significantly reduced as compared with the conventional device. Of course, the capillary tube 15 is formed in a spiral shape, but the flow resistance inside the capillary tube is made the same as that of the conventional straight tube type, so that there is no problem in measuring the viscosity. Further, by connecting the first pump 10A and the second pump 10B to both ends of the capillary tube 15, the sampling for detecting the viscosity can be performed without difficulty, and at the same time, the fuel oil supply line 30 is connected. Disturbance due to pulsation and the like is completely shut off, and a certain amount of oil for measurement at a predetermined pressure by the pump can flow in a laminar flow state, and high accuracy can be maintained.

If the viscosity measurement becomes unstable due to long-term operation, it is necessary to clean the pipeline in the oil viscosity measurement system. In this case, the stop valves V1 and V1 in the inflow path 17 and the outflow path 18 for sampling oil are used.
V2 is closed, and a separately prepared cleaning device pipe (high pressure hose, etc.) is connected to the cleaning liquid supply pipe 19 and the cleaning liquid discharge pipe 1.
The cleaning liquid is supplied from the inflow path 17 by connecting the terminal 9 ′ and operating the cleaning device (not shown). In this case, when the pump 10 (10A, 10B) is driven, the cleaning liquid is sucked, and the capillary tube 15 and the inside of the flow pipe connected to the capillary tube 15 are cleaned via the pump 10 (10A, 10B), and the cleaning is performed for a required time. By continuing the operation, sludge and the like adhering to the inside of the pipe can be washed and removed. In this case, in particular, since the operation is switched from the operating state to the cleaning as it is, the sludge and the like attached to the pipe are in a high temperature state, so that there is an advantage that the removing operation by the cleaning can be efficiently performed. Reference numeral V3 is a pressure equalizing valve.

When the washing operation is completed, the pipes of the washing device are removed, and the stop valves V1 and V2 in the closed inflow passage 17 and outflow passage 18 are opened to immediately set the viscosity measurement state. I can return. Therefore, it is only necessary to maintain the heating of the fuel oil in a steady state for the time for performing the cleaning operation, and it is possible to supply the fuel oil stably for a long time without giving a large fluctuation.
Further, the engine or boiler operation manager manages the fluctuation of the viscosity indicated by the fuel oil viscosity controller, and if it is felt that cleaning is necessary, the operation is performed by cleaning the pipeline in the measurement unit as described above. Since the normal state can be maintained for a long time without causing a change in the state, there is an advantage that management becomes easy.

In the above description of the embodiment, the cleaning of the pipe line of the viscosity measuring system is of the type using a double pump for measurement. However, another embodiment is shown in FIG. Such a configuration can be adopted. In this embodiment, the same parts as those of the above embodiment are denoted by the same reference numerals as those of the above embodiment, and the detailed description thereof will be omitted. In this embodiment, the cleaning solution inlet pipe 19A is connected to the first
Is connected to the input pressure detection pipe 13 to the capillary tube 15 taken out from the discharge side 10a 'of the pump 10A, and the cleaning liquid discharge pipe 19 is connected to the suction side 1 of the second pump 10B.
It is configured to be connected to the output pressure detection pipe 14 of the capillary tube 15 taken out from Ob.

With this configuration, the cleaning liquid can mainly clean the capillary tube 15 without passing through the pump 10 (10A, 10B). Therefore, the present invention can be adopted when the handling of the fuel oil of the boiler is relatively easy or the conditions of the fuel oil are good.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional side view of one embodiment of a viscosity detector including a viscosity detection unit in a fuel oil viscosity automatic control device according to the present invention.

FIG. 2 is a schematic diagram showing a flow of oil in a viscosity detection unit in FIG.

FIG. 3 is a schematic diagram of a fuel oil viscosity automatic control device in which a viscosity detector having a viscosity detection unit according to the present invention is incorporated.

FIG. 4 is a schematic diagram illustrating a flow of oil in a viscosity detection unit according to another embodiment.

FIG. 5 is a diagram illustrating an example of a conventional viscosity detection unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Viscosity detector 2 Body of viscosity detector 3 Bonnet 4 Bonnet boss part 5 Manifold plate 6 Yoke 7 Pump drive motor 10 Pump 10A First pump 10B Second pump 10a First pump suction side 10a 'No. Discharge side of 1 pump 10b Suction side of 2nd pump 10b 'Discharge side of 2nd pump 12, 12' Pump chamber 12a, 12b Pump gear 13, 14 Pipe for differential pressure transmission 15 Capillary tube 17 Oil inflow path Reference Signs List 18 Outflow path for oil 19, 19A Cleaning liquid insertion pipe 19 ', 19B Cleaning liquid discharge pipe 20 Differential pressure transmitter 30 Fuel oil supply pipe 31 Heater 32 Viscosity controller V1, V2 Stop valve V3 Equalizing valve

Claims (3)

[Claims] 1. A viscosity detecting unit in a fuel oil viscosity automatic adjusting device, wherein a capillary tube having a required dimension is spirally wound, and pumps which are synchronously rotated are connected to an inlet side and an outlet side of the capillary tube, respectively. A viscosity detecting unit in a fuel oil viscosity automatic adjusting device, wherein a cleaning liquid pipe is connected to one of the pumps and the other pump so as to communicate with the capillary tube. 2. The automatic adjustment of fuel oil viscosity according to claim 1, wherein the capillary tube is connected to an inlet side and an outlet side thereof and is fitted on an outer shell of a synchronously rotating pump. A viscosity detection unit in the device. 3. The cleaning liquid pipe is connected to an inlet side and an outlet side of the capillary tube, and is connected to a suction side of one of the pumps and a pump discharge side of the other of the pumps that rotate synchronously. A viscosity detecting unit in the fuel oil viscosity automatic adjusting device according to claim 1 or 2.