JPH11304099A - Transfer method of coating material and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably transfer a coating material while holding a satisfactory characteristic at a desired transfer speed regardless of the piping structure by regulating the transfer speed and/or transfer pressure of a force feed tool in the transfer of the coating material by sliding the force feed tool such as a pig inserted into a piping. SOLUTION: When a coating material 3 in a coating material tank 8 is transferred to a tank 17 through a pipeline 2, a valve 9 is opened, and a pump 10 is operated. When the feed of a prescribed quantity of the coating material 3 is completed, a pig 1 is ejected from a pig launcher 6 for the purpose of collecting the coating material 3 within the pipeline 2 by opening a valve 7 and working nitrogen gas of a prescribed pressure from a nitrogen feed part 5 to the pig 1. The pig 1 is advanced while pushing out the coating material 3 in the piping 2 by the pig 1. Sensors 12-14 are provided in the positions where the line resistance to the pig 1 is changed within the piping 2, and the nitrogen pressure from the nitrogen feed part 5 is changed according to the output of each sensor to control the transfer speed of the pig 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of transferring paint for transferring various kinds of paint, and to a transfer device that can be used in carrying out the transfer method.

[0002]

2. Description of the Related Art At present, as a magnetic recording medium such as a video tape, an audio tape, a magnetic disk, etc., a magnetic paint prepared by dispersing ferromagnetic particles in a binder is formed on a non-magnetic support. Having a magnetic layer,
So-called coating type magnetic recording media are widely used in view of their versatility and productivity.

The manufacturing process of this coating type magnetic recording medium is as follows.
Mainly, a magnetic paint preparation step of preparing a magnetic paint by mixing and mixing additives such as a hardener and a lubricant into a paint diluted with an organic solvent, mixing and dispersing magnetic particles in a binder, The magnetic paint obtained in the magnetic paint preparation step is divided into a coating step of coating and forming on the surface of the non-magnetic support, and thereafter, a drying step, a curing treatment step, and the like are performed to produce a magnetic recording medium product. . That is, in order to manufacture a coating type magnetic recording medium, it is necessary to transfer the coating material from the coating preparation step to the coating step (post-processing step).

Here, a process of preparing a magnetic paint and a process of transporting the same in a process of manufacturing a magnetic recording medium will be described with reference to FIG.

[0005] In a process section 54 having a preparation section for magnetic paint, first, an organic solvent is added to a kneaded material 41 comprising a magnetic powder, a binder and other additives in a premix tank 42 while the organic solvent is added thereto. Done. This dilution is performed while mixing by the mixer 43.

[0006] The diluent 44 diluted in the premix tank 42 is transferred to a kneader (or disperser) 45 via a transfer pipe, and kneaded (dispersed) in the kneader 45.
Processing is performed. In the kneader 45, the dispersion process is performed by rotating the shaft 46 by the motor 47 using, for example, a biaxial kneader / mixer.

Next, the mixture 48 subjected to the dispersion treatment is transferred to a storage tank 49 via a transfer pipe, and further mixed in the storage tank 49 by a mixer 50.

Next, from the storage tank 49 in the magnetic paint preparation process section 54, the magnetic paint that has undergone predetermined processing is
Post-processing process section (coating process section, etc.) via outdoor piping 2
It is transferred to a receiving tank 51 in 55. In the receiving tank 51, the paint is mixed by a mixer 52.

The magnetic paint 53 in the receiving tank 51
Although not shown, a predetermined process is performed by being guided to a coating device or the like, and a magnetic recording medium having a magnetic layer on a nonmagnetic support is formed.

Here, when the magnetic paint is transferred from the magnetic paint preparation step to the post-treatment step, the magnetic paint is a viscous paint having a structural viscosity (thixotropic property), and its structure is liable to change with time. (Eg, gelling), and the magnetic properties tend to change (eg, a decrease in the squareness ratio due to the deterioration of the dispersibility of the magnetic particles in the magnetic paint). Therefore, when transferring using a pipe (pipeline), This was addressed by making the transfer distance as short as possible. Or,
This was handled by transport in a transfer container such as a tank truck.

However, when the paint is transferred through a relatively long pipe, simply increasing the length of the pipe increases the pipe resistance, which requires a large pump pressure. Transport becomes difficult.
In addition, paint residues are generated in the pipes, resulting in a large loss of paint when the paint is transferred. At the same time, when the residues are washed, it has to be washed with an organic solvent or the like.

Further, since the time during which the paint stays in the pipe becomes longer, that is, the time during which the paint remains substantially stationary becomes longer, the paint properties (eg, magnetic properties in the case of magnetic paints) of the paint are particularly increased. (For example, gelation of the sol-like paint and decrease in dispersibility of magnetic particles and the like). Further, when the same type of the viscous paint is transferred a plurality of times, if the residue of the paint is generated, the structure and characteristics of the residue change over time. When mixed with a paint, the properties of the resulting viscous paint may vary or deteriorate.

Further, the transfer in the transfer container hinders the automation of the transfer of the paint, and is hardly an efficient transfer method.

[0014]

In view of such circumstances, the present applicant has proposed a viscous paint having a structural viscosity as disclosed in Japanese Patent Application No. Hei 9-114661 (filed on May 2, 1997). When transferring through a pipe, a squeezing tool (pig (PIG) or pig shuttle) that can be slid in close contact with the pipe is provided, and the viscous paint is pressure-fed in the pipe using the squeezing tool. The residue of the paint is not generated in the piping, and the loss of the paint and the trouble of cleaning the residue are reduced.
It has been found that the viscous paint to be transferred can be transferred quickly without deteriorating its properties.

In other words, the method of transferring a viscous paint disclosed in Japanese Patent Application No. 9-114661 is a method of transferring a paint (residue) remaining in a pipe after a normal transfer using a pump. It is a method of extruding by pumping.

Here, when transferring the paint using the pig shuttle described above, a nitrogen gas of a constant pressure (normal transfer pressure value: about 2.0 kg / cm ^{2 to} 3.0 kg / cm) is used.
By supplying ² ) to the pig shuttle, the transfer speed of the pig shuttle is kept constant.

However, when transferring a relatively low-viscosity paint or a relatively short distance, the paint can be transferred well by the above-described constant pressure value transfer. In the case of transfer over long distances, transfer using complicated pipes, etc., it is not enough to transfer while maintaining the characteristics of the paint without leaving residue in the pipes, at the above-mentioned constant pressure value transfer It has been found.

In other words, in the method of transferring the paint while supplying the nitrogen gas at a constant pressure to the pressure feeder (referred to as a constant nitrogen pressure supply method), the influence of the piping structure and the influence of the paint viscosity are considered. Especially, when applying to transfer of highly viscous paint, transfer through long distance pipes, transfer in complicated pipe configuration, etc., the nitrogen pressure at the time of initial movement is the normal transfer pressure described above. The value must be 2-3 times the value (for example, the initial nitrogen pressure is 6.0 kg / cm ² or more).

Here, the effect of the piping configuration is as follows.
The pipe length, the height difference of the pipe, the number of bending points of the pipe, and the like are affected by the pipe configuration, and the pipe resistance (transfer resistance) varies depending on the pipe configuration.

However, if the supply of nitrogen is maintained at a relatively high level at the time of initial operation while maintaining a relatively high nitrogen pressure, the speed of the pig shuttle in the pig shuttle receiving portion (accommodating portion) is increased.
In some cases, the speed may be extremely increased as compared with the speed at the time of the initial movement (for example, the nitrogen pressure at the time of the initial movement is 6.0 kg / cm ²
If the speed is about 50
m / sec). If the pig shuttle reaches the pig shuttle receiving portion while the supply nitrogen pressure is kept constant at the initial operating nitrogen pressure and the speed is increased, the pig shuttle itself or the pig shuttle receiving portion may be broken.

The present invention has been made in view of such circumstances, and has as its object the purpose of transferring a paint stably while maintaining good characteristics at a desired transfer speed, regardless of the piping configuration. And a transfer device capable of performing the transfer method.

[0022]

That is, the present invention relates to a method for transferring a paint by sliding a pressure-feeding device (pig or pig shuttle) disposed in a pipe. The present invention relates to a method of transferring a paint (hereinafter, referred to as a transfer method of the present invention) in which the paint is transferred while adjusting pressure during the transfer.

The pressure-feeding device is a member which can be slid in close contact with the inner surface of the pipe and which can transfer (press-feed) while pushing out the paint. (Synthetic resin, rubber, etc.) can be used.

Further, according to the present invention, when the paint is transferred by sliding a pressure-feeding device disposed in a pipe, the transfer speed and / or the transfer pressure of the pressure-feeding device is adjusted during the transfer and the paint is transferred. And a detecting means for detecting the position of the pressure-feeding tool and / or the flow rate of the paint, and receiving the detection information from the detecting means to adjust the transfer speed and / or the transfer pressure of the pressure-feeding tool. It is an object of the present invention to provide a paint transfer device (hereinafter, referred to as a transfer device of the present invention) having an adjusting means for adjusting.

The adjusting means is means for adjusting the transfer speed and transfer pressure of the pressure-feeding tool based on the information detected by the detection means. For example, the pressure-feeding means for transferring the pressure-feeding tool, It includes a feedback circuit for detecting the position of the pressure feeder and feeding it back to the transfer pressure supply means.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION Next, preferred modes of a transfer method and a transfer device of the present invention (hereinafter, may be referred to as the present invention) will be described.

In the present invention, it is desirable to adjust the transfer speed and / or the transfer pressure of the pumping tool while detecting the position of the pumping tool. That is, the position of the pumping tool is detected by a detecting means such as a sensor, and the detection information is received, so that the transfer speed and the transfer pressure of the pumping tool can be appropriately adjusted.

Further, it is desirable that the detecting means for detecting the position of the pressure-feeding tool is arranged near the position where the transfer resistance fluctuates in the pipe. The change position of this transfer resistance is
For example, the highest position portion of the pipe, a curved portion of the pipe, and the like, and by arranging the detection means at such a position, a change in the speed of the pumping device due to a change in the transfer resistance can be detected well. Then, the transfer pressure and the like can be adjusted by appropriately feeding back this. It is also desirable to dispose the detecting means in the vicinity of the emission part of the pumping tool or the receiving part of the pumping tool. In particular, the detecting means is disposed in the vicinity of the receiving part of the pumping tool, and in accordance with the detection information. By adjusting the transfer speed of the pressure-feeding tool in this way, it is possible to prevent breakage of the receiving portion and the pressure-feeding tool itself, and safe and stable transfer is performed.

Further, it is desirable that the pressure-feeding device is slid by the action of a fluid having a predetermined pressure, and it is particularly desirable to use gas as the fluid. However, a liquid other than a gas may be used as the fluid. For example,
As the gas, nitrogen, helium, argon, oxygen gas, air, or the like can be used. As the liquid, a relatively low-viscosity liquid, such as water or alcohol, can be used.

Further, by controlling the supply pressure of the fluid stepwise or continuously in response to the information detected by the detection means, it is possible to adjust the transfer speed and / or the transfer pressure of the pumping tool. . The detection means may be, for example, a proximity sensor for detecting magnetism, and the position of the pump is detected by the sensor by disposing a magnet in the pump.

The stepwise control includes, for example, a plurality of pressure sources different from each other (for example, a pressure of 2.0 kg).
/ Cm ² , pressure 4.0 kg / cm ² and pressure 6.0 kg
/ Cm ² ), and controlling the pressure of the fluid in a stepwise manner by appropriately selecting a pressure supply source according to the information detected by the detection means. Can be

Further, the supply pressure of the fluid can be controlled continuously, that is, in an analog manner. For example, providing a continuously suppliable source pressure 0kg / cm ² ~6.0kg / cm ² of fluid by adjusting the pressure of the appropriate analog manner the fluid in response to the information detected by said detecting means Is also good.

Further, a flow meter for detecting a flow rate of the fluid may be provided in the pipe. That is, in the present invention, it is possible to adjust the transfer speed and / or the transfer pressure of the pumping tool while detecting the flow rate of the fluid by the flow meter. Since this flow meter detects the flow rate of the paint, it is desirable to provide it near the paint receiving section (paint tank).

Further, in the present invention, even if the paint is a viscous paint having a structural viscosity, the transfer can be carried out well. Of course, other paints may be used. In particular, according to the present invention, even when the paint is a liquid flammable dangerous substance, the transfer speed and the transfer flow rate can be appropriately adjusted. Can be prevented.

Here, the above "viscous paint showing structural viscosity"
Is a material whose structure changes over time when left (standing) (for example, gelation of a sol-like substance), and is a coating material that shows thixotropy in particular,
For example, a magnetic paint in which a magnetic powder is dispersed in a binder, a sol such as iron oxide or aluminum oxide to which an appropriate amount of sodium chloride is added, a suspension such as bentonite, and pigment particles are converted into a polymerized oil. Dispersed paints, grease in which aluminum soap is dispersed in lubricating oil, and the like are included.

Further, according to the transfer method of the present invention, the paint is transferred (pushed) while the pressure-feeding tool is in close contact (sliding) in the pipe, so that a paint having a structural viscosity of, for example, 100 m or more is transferred. Even when the transfer is performed over a long distance, the transfer can be performed at a high speed under a sufficient pressure. For this reason, since the paint can be transferred without generating a residue in the pipe and accompanied by a decrease in the viscosity of the paint (prevention of agglomeration), the paint can be efficiently recovered, and the yield of the paint can be improved. To contribute. Further, since there is hardly any residue or agglomerate due to the paint, the labor for cleaning can be saved.

Further, since the transfer of the paint can be appropriately accelerated, the residence time of the paint in the piping can be shortened (ie, the residence time of the paint can be shortened).
The time during which the paint is substantially stationary can be shortened), and the paint can be transferred (press-fed) without causing cavitation and the like, so that the paint properties of the paint can be prevented from deteriorating. For example, the paint can be stably transferred from the paint preparing step to a predetermined processing step (paint using section) without deteriorating the properties of the paint.

In particular, even when the same type of paint is transported a plurality of times, no paint residue is generated. Therefore, the residue whose structure and characteristics have changed over time and the paint to be transported in the next stage are mixed. In addition, it is possible to perform the transfer in each time with good reproducibility without causing variation or deterioration in properties of the obtained paint. Of course, even when transferring another type of paint after transferring a predetermined type of paint according to the transfer method of the present invention, the predetermined type of paint and the other type of paint are not mixed, Transfer with good reproducibility is performed while maintaining the paint characteristics of each paint.

Further, in the present invention, by applying a fluid having a predetermined pressure from the side opposite to the coating material with respect to the pressure-feeding device, the pressure-feeding device can be pressure-fed to transfer the paint. In addition, this "pressure feeding" means sending out the viscous paint in a predetermined direction while applying a predetermined pressure, and is a concept including transfer at a high pressure and a high speed. As described above, this pumping method may be performed under the action of a gas or under the action of a liquid having a low viscosity. Further, the pumping device may be a magnetic material, and the pumping may be performed under the action of a magnetic field, or the pumping device may be mechanically transferred (for example, by the action of an elastic body such as a spring or rubber), It is also possible to provide the pumping device itself with a moving ability. Further, these pumping methods may be used in combination, for example, such that the pumping tool is fired by a mechanical action, and then the pumping is performed under the action of the gas.

Here, in the transfer under the action of the fluid, the pressure is 0.2 to 0.6 MPa and the speed is 5 to 50 m, although it depends on the kind, viscosity and amount of the paint, the inner diameter of the pipe, and the like. / Min is possible. Also,
According to the pressure feeding under such conditions, while preventing structural changes in the paint (especially gelation of the sol-like paint in a viscous paint and deterioration of the dispersibility of internally added powder), the properties of the paint are improved. Can be transferred without deterioration.

Hereinafter, preferred embodiments according to the present invention will be described.

[First Embodiment] A first embodiment will be described with reference to FIGS. In the present embodiment, a fluid (here, nitrogen gas) is applied from the side opposite to the paint with respect to the pressing device to transfer the pressing device (PIG).

In the present embodiment, as shown in FIG. 1, a pressure feeder (pig or pixel shuttle: the same applies hereinafter) 1 is arranged in a pipeline 2, and is pumped by the action of a fluid such as nitrogen gas 4. By doing so, the paint 3 such as a viscous paint is sequentially transferred to a predetermined location.

As shown in FIGS. 1 and 2, the paint transfer device according to the present embodiment comprises a pig shuttle 1 for pushing out the paint in the pipe, and a sensor (detection means) for grasping the passing position of the pig shuttle 1. A) to D, a nitrogen supply unit 5 that switches the supply pressure in stages, a pig launcher 6 that launches the pig shuttle 1, a pig catcher (reception unit) 20 at the end point of the pig shuttle 1, and piping (pipeline). 2). However, in the present embodiment, the flow meter 15 indicated by a virtual line in FIG. 1 may not be installed. Further, a magnet is arranged in the pig shuttle 1, and each sensor is constituted by a proximity sensor for detecting magnetism.

More specifically, when the pig 1 is transported by the nitrogen pressure from the nitrogen supply unit 5, the sensors A to D installed to grasp the passing points of the pig 1 are used to recognize the passage of each sensor. Every time, the nitrogen supply pressure from the nitrogen supply unit 5 is switched in a stepwise manner to control the transfer speed of the pig shuttle 1, so that the pig shuttle 1 can reach the pig catcher 20 without being damaged.

Next, the operation of the present apparatus will be described.

Transfer paint 3 arranged in paint tank 8
During the normal transfer, the valve 9 is first opened and the pump 10 is operated to start the transfer of the paint under the action of a predetermined pressure. At this time, it is desirable to set the pump pressure so that bubbles and the like due to cavitation do not occur in the paint 3.

Next, after the feeding of a predetermined amount of paint is completed, the pig 1 is ejected from a pig launcher (compression tool launch unit) 6 for the purpose of removing the residue of the paint 3 in the pipe 2 and collecting the paint 3. I do. The pig 1 is emitted by opening the valve 7 and applying a predetermined pressure of nitrogen gas to the pig 1 from the nitrogen supply unit 5, and the pig 1 moves in the pipe by the action of this pressure.

As shown in FIG. 1 (B), FIG. 2 and FIG. 4, the pig 1 immediately after the emission is a sensor 1 arranged near the connection between the pipe for the pig launcher and the pipe 2 for transferring the paint.
The position is detected by 2 (sensor A). For example, when the nitrogen pressure at the time of ejection of the pig 1 is P ₁ (for example, P ₁ =
If 6.0 kg / cm ²⁾ a, and P ₂ (for example P ^₂ = 4.0kg / cm ₂₎ nitrogen pressure after the pig position detection by the sensor A with a predetermined feedback operation.

Then, the pig 1 guided into the pipe 2 advances while pushing out the paint 3 in the pipe 2, and is located at the highest position of the pipe 2 and the sensor 13 (sensor B) ), The position is detected, and furthermore, the position is detected by a sensor 14 (sensor C) arranged near a connection (branch point) between the pig catcher pipe and the paint transfer pipe 2, and the position is detected by these sensors. The transfer speed of the pig 1 is appropriately adjusted based on the position detection information.

For example, let the pressure on the pig after passing through the sensor B be P ₃ (for example, P ₃ = 2.0 kg / cm ² ),
Further, at the time of passage of the sensor C while keeping the pressure P _3, are sequentially transferred.

After all of the paint in the pipe 2 has been transferred to the receiving tank 17, the pig 1 is stored in the pig catcher 20 by opening the valve 18. At this time, the sensor 19 disposed immediately before the pig catcher 20
(Sensor D) causes the nitrogen pressure to reach P ₄ (eg, P ₄
= 0.0 kg / cm ² ) so that the pig 1 reaches the pig launcher 20 slowly.

That is, in the transfer device shown in FIG. 1, each sensor is installed at a point where the line resistance (transfer resistance) with respect to the pig shuttle 1 in the pipe decreases (or increases) in the pipe structure, and the sensors A, B, Each time C and D are passed, the nitrogen pressure from the nitrogen supply unit 5 is gradually reduced to control the transfer speed of the pig shuttle. Note that the line resistance decreasing point is a maximum reaching point in a line where the line rises perpendicularly or almost perpendicularly to the traveling direction of the pig shuttle, a portion where the pipe has been bent, and the like.

As described above, while the position of the pig 1 is detected by each sensor, the nitrogen pressure supplied from the nitrogen supply unit 5 is appropriately changed based on the detected information, and the transfer speed and / or the transfer pressure of the pig 1 are changed. By adjusting the pipe length, the paint 3 can be transferred irrespective of the pipe configuration such as the pipe length, the height difference of the pipe, the number of bends in the pipe, and the like. )
Can be prevented from being damaged. Further, even if the paint to be transferred is a liquid flammable dangerous substance, the transfer speed can be set to a desired value, so that ignition (fire) due to static electricity or the like accompanying an increase in the transfer speed (transfer flow rate) is prevented. , Any paint can be transferred stably.

Next, an example of a system configuration according to the present embodiment will be described with reference to FIG.

In the system configuration according to the present embodiment, a supply source capable of supplying the nitrogen pressure P ₁ and a supply source capable of supplying the nitrogen pressure P ₂ are provided in one area A where the paint to be transferred is disposed. And a supply source capable of supplying the nitrogen pressure P _{3. The} PLC-A 21 is provided based on detection information from the sensors A, B, C and D.
a, a predetermined signal is output from the valves 23, 24 of the respective supply sources.
And 25 to open and close each valve. That is, as described above, a pressure of P ₁ at the time of pig firing, sensors P pressure by the detection signal from A _2, sensors B and P ₃ the pressure by the detection signal from the sensor C, the signal from the sensor D The pressure is set to P ₀ (P ₀
Means stop of pressure supply).

The detection information from the sensors B, C and D is stored in the PLC-
B22, which is once collected and transmitted to the area-A via a communication line (or network communication) 26 arranged outdoors.
And the above pressure adjustment is performed. The PLC is a control device (sequencer) (the same applies hereinafter).

Next, a flowchart of pig transfer according to the present embodiment will be described with reference to FIG.

First, after the feeding of the paint (paint) in the area-A is completed (pre-process completion), the transfer of the pig is started. Then, a predetermined signal is sent to the valve 7 opened valve 7, is started further supply of the nitrogen pressure (pressure at this time is P _1), the transfer of the pig 1 is started.

Next, when the pig 1 passes through the sensor A (when the sensor A is turned on), this passing information is transmitted to the nitrogen pressure supply unit 5 and the nitrogen pressure is switched (P ₁ → P ₂ ). Further, when the pig 1 passes through the sensor B (when the sensor B is turned on), this passing information is transmitted to the nitrogen pressure supply unit 5 and the nitrogen pressure is switched (P ₂ → P ₃ ).

Next, when passing through the sensor C while maintaining the pressure P ₃ and further passing through the sensor D (when the sensor D is turned on), this passing information is transmitted to the nitrogen pressure supply unit 5 and The pressure is switched (P ₃ → P
₀ ). That is, the supply of the nitrogen pressure is stopped immediately before the pig catcher 20 stores the pig 1, the valve 7 is closed, and the transfer of the paint by the pig is completed.

If the detection information at the sensors A, B, C and D is off (that is, no passage information is input), this information is transmitted to the TIM (delay timer on the program) and the The result is output as a line abnormality of.

Next, a time chart of pig transfer according to the present embodiment will be described with reference to FIG.

That is, when the pig emitted at the pressure P ₁ is detected by the sensor A, the nitrogen supply pressure is switched to P ₂ by a predetermined information transmission operation. There is switched to P _3. Then, only the passage information is transmitted to the sensor C while the pressure P ₃ is maintained, and the nitrogen pressure becomes P ₀ (that is, the pressure supply is stopped) according to the detection information of the sensor D. At the time of adjustment of the nitrogen pressure, not change instantaneously from the pressure P ₁ to a pressure P _2, as shown, it changes gradually. In particular, the pressure from the pressure P ₃ gently to pressure change when the P _0, becomes substantially zero its velocity in the pig receiver, damage of the pig and pig receiving portion is prevented.

[Second Embodiment] Next, a second embodiment according to the present invention will be described.

This embodiment is basically the same as the first embodiment. However, as shown in FIG. 5, the nitrogen supply unit 5 is configured so that the supply pressure thereof can be adjusted in an analog manner by an electropneumatic converter or the like, and as shown by the phantom line in FIG. The instantaneous flow rate is monitored by a flow meter 15 that measures the flow rate of the paint disposed in front, and the transfer speed of the pig shuttle 1 is controlled by controlling the nitrogen pressure so as to keep the flow rate constant.

That is, as shown in FIG. 5, the flow rate detection information from the flow meter 15 is transmitted to the nitrogen gas supply unit 5 via the PLC-B 22 and the PLC-A. The flow rate of the paint is instantaneously measured, and the nitrogen pressure is adjusted based on the measurement information.

As described above, according to the first embodiment and the second embodiment based on the present invention, the paint transfer using the pig shuttle, which is independent of the configuration of the piping, is established. The transfer speed of the pig shuttle can be stabilized. Accordingly, it is possible to prevent the pig shuttle itself and the transfer device, particularly the pig receiving portion (pig catcher), from being damaged, and to increase the transfer flow rate (transfer speed) even when the transferred paint is a liquid ignitable dangerous substance. It is also possible to prevent a fire from occurring due to static electricity or the like.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to such embodiments.

For example, in each of the above embodiments,
The paint in the pipe is being transferred using a single pump.
You may transfer using two pressure-feeding tools so that a paint may be pinched. It is also possible to transfer a plurality of types of paints using a plurality of pressure feeders. Further, with respect to the transfer of the paint, the transfer side of the paint (that is, the side opposite to the pumping device with respect to the paint) may be in a normal pressure state or a reduced pressure state. In particular, when the transfer side is in a reduced pressure state, the paint and the pressure-feeding tool can be transferred more smoothly.

As described above, it is preferable to use a gas such as nitrogen gas as the fluid. That is, a supply source for supplying the gas can be provided, a gas at a predetermined pressure from the supply source can be introduced, and the pump can be pumped under the action of the gas. In the present invention, since the pressure feeder slides in close contact with the inner surface of the pipe, the gas hardly comes into contact with the viscous paint, and any gas can be used as the gas. Use of gas is advantageous in terms of ease of handling, flexibility in piping, productivity, and the like.

Further, in the present invention, it is desirable to use a pressure-feeding device made of resin as the pressure-feeding device. Since the pressure feeder made of resin has elasticity, it can be slid in close contact with the inner surface of the pipe. As the resin raw material, for example, it is preferable to use an elastic body such as solvent-resistant polyurethane and solvent-resistant silicon.

Further, it is desirable that the outer diameter of the pressure-feeding device made of the resin is configured to be larger than the inner diameter of the pipe. That is, the outer diameter of the pressure-feeding tool is set to be 10
By increasing the size by about 1 to 103%, a pressure-feeding device that can be smoothly brought into close contact with the inner surface of the pipe is obtained. For example, when the inner diameter of the pipe is 70.3 mm, it is preferable that the outer diameter of the pressure-feeding tool is about 71.7 mm.

Further, it is preferable that the pumping device is a hollow member. When the hollow portion is provided in the pumping device in this way,
The elasticity of the pumping device is further improved, and the pumping device adheres better to the inner surface of the pipe and slides smoothly.

It is preferable that the distal end of the pressure-feeding device is formed in a hemispherical shape as shown in the figure. With such a shape, the pressure-feeding device can easily pass through the inside of the pipe and move smoothly. However, the shape, size, and the like of the pressure-feeding tool are not limited to those described above, and a size suitable for the inner diameter of the pipe can be used. Also, its shape is
The tip does not have to be formed in a spherical shape, but may be in a concave shape (a concave spherical shape) or a convex shape.

In the present invention, the inner surface of the pipe is preferably polished for the purpose of reducing the resistance in the pipe and preventing the paint from sticking. Examples of the polishing method include a method of buffing using a polishing wheel (buff) made of cloth or an appropriate substance and an abrasive.

Further, it is preferable that a seam (particularly, an inner surface) of the pipe is flattened in advance. If the seam of the pipe is flat, the pumping device can move smoothly, the transfer resistance in the pipe can be reduced, and the paint can be prevented from adhering to the inner surface of the pipe.

Further, it is preferable that the inside diameter of the pipe and the inside diameter of the valve through which the pressure feeder passes are all substantially the same. By making the inside of the pipe substantially the same diameter including the inside of the valve, it is possible to smoothly transfer the pressure-feeding tool. However, in the vicinity of the receiving portion of the pressure-feeding device, it is desirable to reduce the transfer speed of the pressure-feeding device, so the inner diameter of the pipe may be slightly reduced in this portion.

Further, according to the present invention, it is sufficiently possible to transfer the paint using a relatively long pipe of 100 m or more, for example, 100 to 500 m. The inner diameter of the pipe is, for example, 1.5 to 3 inches (about 3.8 to 7.7 cm) when the length of the pipe is about 100 m, and 2 to 3 when the length of the pipe is about 300 m. 3.5 inches (about 5
8.9 cm), when the length of the pipe is about 500 m,
It is preferable that the diameter is about 2.5 to 4 inches (about 6.3 to 10.2 cm) from the viewpoint of transportability.
Preferably, it is about 2.5 inches (about 6.3 cm) at 0 m, about 3 inches (about 7.7 cm) at 300 m, and about 3.5 inches (about 8.9 cm) at 500 m. According to the present invention, the transfer of the pumping tool, while appropriately adjusting the transfer speed and the transfer pressure by the position detecting means of the pumping tool and the paint flow rate detecting means,
That is, since the paint is transferred, the accuracy required for the pipe may be relatively low.

It is preferable to use a straight pipe as much as possible in order to reduce transfer resistance, but it is also possible to use a curved pipe as appropriate.
According to the present invention, by arranging the detection means at each point where the transfer resistance increases, it is possible to appropriately detect the moving speed of the pressure-feeding tool and stabilize it.

In the present invention, the transferred paint may be, for example, a magnetic paint comprising a magnetic powder and a binder. Generally, a coating type magnetic recording medium (for example, 8 m
m video tape, optical disk, etc.) in a kneading step of kneading a binder, magnetic powder (magnetic particles), an organic solvent (solvent), etc., and adding an organic solvent to the kneaded material obtained in the kneading step. A magnetic layer paint preparation step including a dilution step of diluting the kneaded material and a dispersion step of dispersing the diluted substance obtained in this dilution step, and a subsequent predetermined treatment (paint use step). It comprises various steps such as a coating step of applying the coated paint on a non-magnetic support, a calendering step, a curing step, and a slit (cutting) step.

In particular, as the types of paints are diversified, the distance between the paint preparation step and the use step tends to increase. According to the present invention, as described above, this magnetic paint is used. Upon transferring from the preparation step of the magnetic paint to the coating step, the magnetic paint is a viscous paint having a structural viscosity, the structure of which is likely to change, and even if the magnetic properties are likely to change, No magnetic paint residue is generated in the pipe, reducing the loss of magnetic paint and the trouble of cleaning the agglomerates, and transferring the magnetic paint quickly and smoothly without deteriorating the properties of the magnetic paint to be transferred. be able to.

Here, as the magnetic powder, a ferromagnetic powder such as an oxide magnetic powder or a metal magnetic powder can be used. Known magnetic powders can be used. For example, as the oxide magnetic powder, γ-Fe ₂
Examples of the metal magnetic powders such as O ₃ and Co-containing γ-Fe ₂ O ₃ include metal powders such as Fe, Co, and Ni, and Fe powders.
-Al-based, Fe-Al-Ni-based, Fe-Al-Zn-based alloy metal powders can be used.

The binder is a polyurethane resin,
A typical example is a vinyl chloride resin such as a polyester resin and a vinyl chloride copolymer. These resins, in order to improve the dispersibility of the magnetic powder, -SO ₃ M, -OSO
₃ M, -COOM (M is an alkali metal atom or a hydrogen atom) may be those containing a polar group such as.

The magnetic layer is mainly composed of the above magnetic powder and a binder. The abrasives, lubricants, hardeners, dispersants, and abrasives usually used in this type of magnetic recording medium are used. An additive such as an antistatic agent may be added. The type, blending amount and the like of these additives can be arbitrary.

Paint for magnetic layer (magnetic paint) having the above structure
Is a viscous paint that exhibits structural viscosity, which is a sol-like substance at the time of kneading and dispersing, but easily gels when left standing,
In addition, the dispersibility of the magnetic powder and the like is likely to deteriorate. The viscosity of these magnetic layer paints is usually 2,000 to 10,000.
According to the transfer method and the transfer device of the present invention, even a magnetic paint having a viscosity of cps and such a viscosity can be efficiently transferred, and the characteristics (eg, dispersibility) of the magnetic paint are deteriorated. Also less.

Further, in the present invention, as shown in FIG. 6, the pig launching part is a storage part (pig launcher) for the pig 1.
6, a pig introduction valve 32 (corresponding to the valve 7 in FIG. 1) on the launch side of the pig 1 of the pig launcher 6, a gas supply unit 5 for supplying a gas for pressure feeding from the rear of the pig 1, and this gas And a gas supply adjusting valve 33 for adjusting the supply amount of the gas.
4 may be connected. Here, although not shown, the pig launcher 6 is provided with a window for taking in and out the pig 1, and the pig launcher 6 may be configured so that a plurality of pigs 1 can be arranged. Although not shown, the gas supply unit 5 or the valves 32 and 33 have valves 32, 3
The sensor and the signal transmission cable may be connected so that a predetermined signal for opening / closing or adjusting the gas supply amount is supplied. Further, the gas supply unit 5 may be capable of adjusting the supply pressure in an analog manner, or may be composed of a plurality of gas supply sources capable of supplying different pressures from each other.

As shown in FIG. 7, the receiving portion of the pig 1 is provided with a valve 36 (corresponding to the valve 18 of FIG. 1) for preventing a large amount of the paint from entering the pig catcher 20 of the pig 1. , Pig 1 catcher (pig catcher) 20, and may be connected to a predetermined position (connecting portion) 37 of the pipe 2. The pig catcher 20 is provided with a window for taking in and out the pig 1 similarly to the pig launcher 6 (not shown).
It may be configured such that a plurality of pigs 1 can be arranged. Although not shown, a sensor is provided in the vicinity of the connection portion 37, and a signal transmission cable for obtaining a predetermined signal from the sensor may be connected.

Further, in the present invention, the paint may be transferred while simultaneously detecting the position of the pressure feeder and the flow rate of the paint. In this case, since the information of the paint flow rate by the flow meter can be obtained in addition to the position sensors A to D, two parameters (that is, the pig position information and the paint flow rate information) are used by a predetermined calculation process. Thus, more accurate pressure control can be performed. That is, it is possible to actually adjust the pressure of the nitrogen gas (control the rate of change at each sensor position) according to the flow rate information.

[0090]

According to the transfer method of the present invention, when the paint is transferred by sliding the pressure feeder disposed in the pipe, the transfer speed and / or the transfer pressure of the pressure feeder are adjusted during the transfer. Since the paint is transferred while being adjusted, the transfer of the paint can be carried out at a desired transfer speed and transfer pressure, and the desired paint characteristics can be maintained at a desired transfer speed irrespective of the piping configuration. Paint can be transferred smoothly.

In particular, since the transfer speed of the pressure-feeding device can be stabilized, the transfer speed itself can be prevented from being extremely increased, and the pressure-feeding device itself and its receiving portion can be prevented from being damaged. Even in the case of this, it is possible to prevent ignition, fire, and the like due to static electricity and the like accompanying an increase in the transfer speed.

According to the transfer device of the present invention, when the paint is transferred by sliding the pressure-feeding device arranged in the pipe, the transfer speed and / or the transfer pressure of the pressure-feeding device are adjusted during the transfer. A device for transferring the paint while detecting the position of the pressure-feeding tool and / or the flow rate of the paint, and receiving the detection information from the detecting means, and detecting the transfer speed and / or the transfer speed of the pressure-feeding tool. Since the apparatus has the adjusting means for adjusting the transfer pressure, the transfer method of the present invention can be performed with good reproducibility.

[Brief description of the drawings]

FIG. 1 is an enlarged view (A) in a pipeline according to a first embodiment of the present invention, and a schematic diagram (B) of a main part of an apparatus configuration based on the transfer method.

FIG. 2 is a configuration diagram of the transfer system.

FIG. 3 is a flowchart for explaining a detection information feedback operation at the time of transferring a pressure feeder (pig).

FIG. 4 is a schematic diagram showing a time chart when the detection information feedback operation is performed.

FIG. 5 is a configuration diagram of a transfer system according to a second embodiment of the present invention.

FIG. 6 is a schematic cross-sectional view of the vicinity of a pressure-feeder launching section (pig Launcher) in the transfer device of the present invention.

FIG. 7 is a schematic cross-sectional view of the vicinity of the pressure-feeding device receiving portion (pig catcher).

FIG. 8 is a schematic diagram showing a transfer process of a magnetic paint using a conventional pipeline.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Pumping tool [Pig], 2 ... Pipeline (piping), 3 ... Paint, 4 ... Nitrogen gas, 5 ... Nitrogen gas supply part,
6 ... pig launcher, 7, 9, 11, 16, 18, 2
3, 24, 25 ... valve, 8 ... paint tank, 10 ... pump, 12 ... sensor A, 13 ... sensor B, 14 ... sensor C, 15 ... flow meter, 17 ... receiving tank, 19 ... sensor D, 20 ... pig Catcher, 21 ... PLC-A,
22 PLC-B, 26 Communication line, 27 Variable valve, 31, 32, 33, 35, 36 Valve, 34, 3
7 Connection part, 41 kneaded material, 42 premix tank, 43 mixer, 44 diluent, 45 kneader, 46
... shaft, 47 ... motor, 48 ... mixture, 49 ... storage tank, 50 ... mixer, 51 ... receiving tank, 5
2 ... Mixer, 53 ... Magnetic paint, 54 ... Magnetic paint production process part, 55 ... Post-processing process part

Claims (22)

[Claims] When transferring a paint by sliding a pumping tool disposed in a pipe, transferring the paint while adjusting a transfer speed and / or a transfer pressure of the pumping tool during the transfer. How to transfer paint. 2. The paint transfer method according to claim 1, wherein the transfer speed and / or the transfer pressure of the pump is adjusted while detecting the position of the pump. 3. The method of transferring paint according to claim 2, wherein the detecting means for detecting the position of the pressure-feeding tool is arranged near a position where the transfer resistance varies in the pipe. 4. The apparatus according to claim 3, wherein the detecting means is disposed at a highest position of the pipe and / or a curved portion of the pipe.
The method for transferring paint described in 1. 5. The method for transferring a paint according to claim 1, wherein said pressure-feeding device is slid by the action of a fluid having a predetermined pressure. 6. The method for transferring a paint according to claim 5, wherein a gas is used as the fluid. 7. The transfer speed and / or the transfer pressure of the pumping device is adjusted by controlling the supply pressure of the fluid stepwise or continuously in response to information detected by the detection means. 5. The method for transferring a paint according to 5. 8. The method according to claim 7, wherein the supply pressure of the fluid is controlled in an analog manner. 9. The method according to claim 5, wherein a flow meter for detecting a flow rate of the fluid is provided in the pipe. 10. The paint transfer method according to claim 9, wherein the transfer speed and / or the transfer pressure of the pumping device is adjusted while detecting the flow rate of the fluid by the flow meter. 11. The method according to claim 1, wherein the paint is a viscous paint having structural viscosity. 12. An apparatus for transferring the paint while adjusting the transfer speed and / or the transfer pressure of the pump when the paint is transferred by sliding the pump provided in the pipe. Detection means for detecting the position of the pressure-feeding tool and / or the flow rate of the paint; and adjusting means for adjusting the transfer speed and / or the transfer pressure of the pressure-feeding tool in response to information detected by the detection means. And a paint transfer device. 13. The paint transfer apparatus according to claim 12, wherein the transfer speed and / or the transfer pressure of the pump is adjusted while the position of the pump is detected by the detection unit. 14. The apparatus according to claim 13, wherein said detecting means is arranged near a position where the transfer resistance varies in said pipe.
3. The paint transfer device according to 1. 15. The detecting means is disposed at a highest position of the pipe and / or at a curved portion of the pipe.
The paint transfer device according to claim 14. 16. The paint transfer device according to claim 12, wherein the pressure-feeding device slides by the action of a fluid having a predetermined pressure. 17. The paint transfer device according to claim 16, wherein a gas is used as the fluid. 18. The pressure supplied to the fluid is controlled stepwise or continuously in response to information detected by the detection means, and the transfer speed and / or the transfer pressure of the pumping device is adjusted. 17. The paint transfer device according to item 16. 19. The paint transfer device according to claim 18, wherein the supply pressure of the fluid is controlled in an analog manner. 20. The paint transfer device according to claim 16, wherein a flow meter for detecting a flow rate of the fluid is provided in the pipe. 21. The paint transfer apparatus according to claim 20, wherein the transfer speed and / or the transfer pressure of the pumping device is adjusted while detecting the flow rate of the fluid by the flow meter. 22. The paint transfer device according to claim 12, wherein the paint is a viscous paint having a structural viscosity.