JPH08270868A - Fluid suppling device - Google Patents

Abstract

PURPOSE: To provide a magnetic paint supplying device formed with a pipeline in which any accumulation of liquid will not occur at pipe joint even if the flow path of magnetic paint is switched over. CONSTITUTION: A magnetic paint supplying device 2 comprises a service tank ST, a liquid supplying device to supply magnetic paint from the tank to a receiving part such as a coater through a pipeline, and multiple pipes T21 to T36 forming the pipeline. Also a branch path is present at least one position, and these branch paths are connected through three-way valves V31 to V36 (excluding V34) of an L-shape flow path and three-way valves V34 of T-shape flow. When these three-way valves are switched over, fluid flow path can be switched over from one pipe to the other one.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a liquid piping line,
Particularly, the present invention relates to improvement of a magnetic paint supply line in a manufacturing factory for magnetic recording media such as magnetic tapes and magnetic disks, and provides a liquid supply device which does not cause a liquid pool of magnetic paint even if its flow path is changed. Is what you are trying to do.

[0002]

2. Description of the Related Art First, a magnetic paint supply device, which is a kind of conventional liquid supply device, will be described with reference to FIG. Conventionally,
The flexible strip wound in a roll shape has a surface treatment according to its application, for example, a magnetic coating, a photographic photosensitive coating, a surface protection, an antistatic or a lubrication coating liquid applied on the surface. Etc. and, if necessary, finishing treatment, and then cut into desired width and length. Typical products include magnetic recording media such as coating type magnetic tapes and magnetic disks, various photographic films, and photographic papers.

For the sake of convenience, a coating type magnetic recording medium will be described as a product. One of the manufacturing processes of this magnetic recording medium is a coating process of applying a magnetic paint. In this coating step, a long, wide base film made of plastic, which is a flexible strip wound in a roll shape, is continuously fed to the coating section at a predetermined speed under a predetermined tension to apply the base film. Magnetic coating is applied to the surface of the part. As the coating method, there are methods such as roll coating, gravure coating, and extrusion coating.

In this coating process, the magnetic coating material supply device 1 having a piping structure as shown in FIG. 4 is currently used for supplying the magnetic coating material. The magnetic coating material supply device 1 is configured to perform a coating mode, a circulation mode, a filter drain mode, a circulation purging mode, a tank drain mode, a coating purging mode, and the like.

Therefore, the magnetic paint supply device 1 is constructed as follows. That is, a pipe T1 equipped with a valve V1 is connected to the bottom of a service tank ST containing magnetic paint, and the other end is equipped with one end of a pipe T2 equipped with a valve V2 and a valve V3. It is connected to an intermediate point between one end of the pipe T3. The pipe T2
The drain DN1 is connected to the other end of the. Piping T3
Is connected to the input side of the pump P1, the output side thereof is connected to one end of a pipe T4 equipped with a valve V4, and the other end is connected to one end of a pipe T5 equipped with a valve V5. And one end of the pipe T6 to which the filter F is attached are connected. The drain D is provided at the other end of the pipe T5.
N2 is connected. The other end of the pipe T6 is connected to one end of a pipe T7 attached with the valve V6 and one end of a pipe T8 attached with the valve V7, and the drain DN3 is connected to the other end of the pipe T7. There is. The other end of the pipe T8 is connected to one end of a pipe T9 attached with the valve V8 and one end of a pipe T10 attached with the valve V9.

An input side of the pump P2 is connected to the other end of the pipe T10, one end of the pipe T11 having a valve V11 attached to the output side thereof, and a coater (not shown) or the like at the other end. And the supplied magnetic paint is applied to the base film. Further, a pipe T having a valve V10 mounted on the output side of the pump P2
12 is connected to one end, and the drain D is connected to the other end.
N4 is connected. The other end of the pipe T9 is connected to one end of a pipe T13 having the valve V12 attached thereto and one end of a pipe T14 having the valve V13 attached thereto. The other end of the pipe T13 is returned to the service tank ST at its upper end. Further, the drain D is provided at the other end of the pipe T14.
N5 is connected.

Next, the function of the magnetic paint supply device 1 will be described. Valves V1, V3, V4, V7, V8, V13
Open and open pump P1 to open service tank S
The magnetic paint from T is filtered by filter F, and drain D
When discharged from N5, each pipe T1, T3, T4, T6,
The inside of T8, T9 and T14 can be replaced with a new magnetic paint. Next, by opening the valve V12 and closing V13, the magnetic paint can be circulated.

Next, by opening the valves V9 and V10 and operating the pump P2, the magnetic paint can be discharged from the drain DN4, and the pipes T10 and T12 can be replaced with new magnetic paint. Next, the valve V10
Is closed, the valve V11 is opened, and the magnetic coating material is supplied to be ready for coating. The flow rate at this time is set so that the flow rate by the pump P1 is larger than the flow rate by the pump P2. The valve V2 is for discharging the magnetic paint in the service tank ST, and the valves V5 and V6 are the filters F.
Since it serves as a discharge for, it remains closed except at that time.

[0009]

In the magnetic paint supply device 1 having such a configuration, since the T-shaped joint is used in the branch passage of each pipe, pockets are formed, and diagonal lines are formed in those pocket portions. A liquid pool will be generated in the applied pipe part (Fig. 4). When the magnetic paint becomes stationary,
Since the curing agent and the additives are mixed, the fluid deterioration such as gelation becomes remarkable. The deteriorated magnetic paint gradually mixes with the flow of normal magnetic paint being applied,
It also affects the magnetic paint with a normal bending angle, and the coating quality is greatly reduced. Similarly, the same phenomenon as described above occurs in the branch passages at the valves V10 and V13. Therefore, in the present invention, in the magnetic paint supply line,
An object of the present invention is to obtain a magnetic paint supply device configured by a piping line in which liquid pool does not occur in a pipe joint or the like even if the flow path of the magnetic paint is changed.

[0010]

Therefore, a magnetic paint supply device, which is one of the liquid supply devices of the present invention, supplies a magnetic paint supply source and the magnetic paint from the magnetic paint supply source through a pipeline. In the magnetic paint supply device, the pipe line is composed of a plurality of pipes, and at least 1
There is a branch passage at several places, a three-way valve is attached to the branch passage, and the flow path of the magnetic paint is switched from one pipe to the other pipe by switching the direction of the three-way valve. Solved the problem.

[0011]

Therefore, in the magnetic coating material supply device of the present invention, even if the flow paths of the magnetic coating material are switched, there is no place where liquid pools are formed in all the flow paths, so that the normal magnetic coating material can be supplied through the flow paths. it can.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the magnetic paint supply device of the present invention will be described with reference to the drawings. FIG. 1 shows a piping line of a magnetic paint supply device according to an embodiment of the present invention, FIG. 2 shows a three-way valve used in the piping line of the magnetic paint supply device shown in FIG. 1, and FIG. Is a sectional view showing a switching state, FIG. B is a sectional view showing a switching state from the state of FIG. A to another state, and FIG. 3 is a piping line of the magnetic paint supply device shown in FIG. Showing another three-way valve to use,
FIG. A is a sectional view showing a switching state in one direction, and FIG.
FIG. 4 is a cross-sectional view showing a switching state from the state of FIG. A to another state.

First, referring to FIG. 1, the structure of a magnetic paint supply device 2 according to an embodiment of the present invention will be described. A pipe T21 equipped with a valve V21 is connected to the bottom of the service tank ST containing the magnetic paint, and the other end is connected to the first pipe connection port A of the three-way valve V31. The pipe T is connected to the third pipe connection port C of the three-way valve V31.
One end of 22 is connected, and the drain DN21 is connected to one end of the pipe T22. In addition, the three-way valve V3
One end of the pipe T23 is connected to the first second pipe connection port B, and the other end of the pipe T23 is connected to the input side of the pump P21.

A pipe T24 is connected to the output side of the pump P21, the other end is connected to the third pipe connection port C of the three-way valve V32, and the pipe T2 is connected to the second pipe connection port B of the three-way valve V32.
A pipe T26 is connected to one end of the pipe 5, and to the first pipe connection port A of the three-way valve V32. Also, the pipe T25
A drain DN22 is attached to the other end of the pipe T26, and a filter F is attached to the other end of the pipe T26.

A pipe T27 is provided on the output side of the filter F.
Is connected to one end, and the other end is connected to the first pipe connection port A of the three-way valve V33. One end of a pipe T28 is connected to the second pipe connection port B of the three-way valve V33, and the drain DN23 is attached to the other end of the pipe T28. Further, one end of a pipe T29 is connected to the third pipe connection port C of the three-way valve V33, and the pipe T29 is connected to the third pipe connection port C.
The other end of 29 is connected to the first pipe connection port A of the three-way valve V34.

One end of the pipe T30 is connected to the second pipe connection port B of the three-way valve V34, and the pipe T is connected to the third pipe connection port C thereof.
One end of 34 is connected. The input side of the pump P22 is attached to the other end of the pipe T30, and one end of the pipe T31 is connected to the output side thereof to the first pipe connection port A of the three-way valve V35. Third pipe connection port C of three-way valve V35
Is connected to one end of a pipe T32, and the drain DN24 is attached to the other end. A pipe T33 is connected to the second pipe connection port B of the three-way valve V35, and the other end is connected to a coating device (not shown).

One end of a pipe T34 is connected to the third pipe connection port C of the three-way valve V34, and the other end is connected to the first pipe connection port A of the three-way valve V36. One end of a pipe T35 is connected to the second pipe connection port B of the three-way valve V36, and the other end faces the service tank ST. Further, one end of the pipe T36 is connected to the third pipe connection port C of the three-way valve V36, and the drain DN25 is attached to the other end.

The three-way valve is generally sold by, for example, Kitamura Valve Co., Ltd. and Kitz. In one structure of the three-way valve, as shown in FIG. 2, a spherical space 40 is formed in the core, and the second pipe connection port B is formed.
And the third pipe connection port C are formed in a straight line, and the ball holder 41 in which the first pipe connection port A is formed in a direction perpendicular to the center thereof and the space 4 of the ball holder 41.
0, and the rotating ball 43 in which the L-shaped flow path 42 is formed in the central portion and the second ball connecting port B and the third pipe connecting port C formed on the straight line are perpendicular to each other. The rotary shaft 44 is planted in 43 and is formed so as to project to the outside of the ball holder 41, and a handle 45 attached to the upper end of the rotary shaft 44.

In the state shown in FIG. 2A, the three-way valve having such a structure has the first pipe connection port A as indicated by the arrow Y.
Liquid enters from the second side on the left side as indicated by arrow Xa.
What flows to the pipe connection port B is rotated 180 ° as shown by an arrow R by urging the handle 45 with an actuator (not shown) about the ball center line L-L of the three-way valve. 2B, the liquid that has entered from the first pipe connection port A can flow to the third pipe connection port C on the right side as shown by the arrow Xb.

In another structure of the three-way valve, as shown in FIG. 3, a spherical space 50 is formed in the center, and the second pipe connection port B and the third pipe connection port C are formed. Is formed in a straight line, and is fitted in the space 50 of the ball holder 51 and the ball holder 51 in which the first pipe connection port A is formed in a direction perpendicular to the central part, and a T-shaped flow is formed in the central part. Although not shown, the rotary ball 53 having the passage 52 formed therein is perpendicular to the second pipe connection port B and the third pipe connection port C formed on the straight line (perpendicular to the paper surface). And a handle attached to the upper end of the rotary shaft formed so as to project to the outside of the ball holder 51.

In the state shown in FIG. 3A, the three-way valve having such a structure has the first pipe connection port A as indicated by the arrow Y.
Liquid enters from the second side on the left side as indicated by arrow Xa.
What flows to the pipe connection port B is rotated by 90 ° as shown by an arrow R by urging the handle with an actuator (not shown) about the ball center line L-L of the three-way valve. When switched to the state shown in FIG. 3B, the liquid entering from the first pipe connection port A is indicated by the arrow Xa,
As indicated by Xb, it is possible to switch and flow the second pipe connection port B and the third pipe connection port C in both left and right directions.

A combination of these two types of three-way valves is shown in FIG.
The magnetic paint supply device 2 shown in FIG. The three-way valves of this magnetic paint supply device 2 are three-way valves V31, V32, V
33, V35, and V36 use the three-way valve of the rotating ball 43 in which the L-shaped flow path 42 is formed, and only the three-way valve V34 uses the three-way valve of the rotating ball 53 in which the T-shaped flow path 52 is formed.

Accordingly, in the magnetic paint supply device 2, when a new magnetic paint is used for the piping line circulating from the service tank ST containing the magnetic paint to the service tank ST, the valve V21 is opened and the three-way valve V34 is opened. Only the return side of the service tank ST is opened, the drain DN25 side of the three-way valve V36 is opened, and the pump P21 is operated to drain the capacity of this piping line, and then the three-way valve V3.
6 is switched so that the service tank ST side is opened.

Next, the three-way valve V34 is switched to the state shown in FIG. 3B so that the magnetic paint flows to both the return side and the application side of the service tank ST, and the drain DN24 side of the three-way valve V35 is opened to pump the pump. After P22 is activated and the capacity of the piping line between the three-way valve V34 and the three-way valve V35 is drained, the three-way valve V35 is switched to the application side, whereby application can be performed. At this time, the flow rate of the magnetic paint is set so that the flow rate by the pump P21 is higher than the flow rate by the pump P22, and the magnetic paint is operated. This is because the magnetic paint is circulated from the service tank ST through the filter F so that the pump P22 pulls the magnetic paint in an amount necessary for application.

Furthermore, the operation of the pumps P21 and P22 is stopped, the supply of the magnetic paint is stopped, and the three-way valve V31 is drained.
When switched to the N21 side and opened, the magnetic paint in the service tank ST can be drained. Also, three-way valve V
When the 32 and the three-way valve V33 are switched to the drain DN22 and the drain DN23 side and opened, the magnetic paint in the filter F can be drained. In these cases, even if the three-way valves are switched, no liquid pool (paint pool) is generated in the piping line from the service tank ST to coating.

Remote operation can be performed by driving each of the three-way valves by, for example, an air actuator. Further, when each pipe is formed of a sanitary pipe instead of a gas pipe, a step inside the pipe is eliminated, the inner diameter of the pipe becomes constant, and the magnetic paint can flow smoothly.

In the above description, the magnetic paint supply device for flowing the magnetic paint has been described as an example, but as described at the beginning,
In the liquid supply device of the present invention, the liquid is not limited to the magnetic paint, and can be applied to photo-sensitive paint, surface protection, antistatic or lubrication coating liquid, and other general coating paints. Therefore, the liquid supply device is not limited to the magnetic paint supply device, and can be widely applied to the liquid supply devices for flowing the respective liquids.

[0028]

As described above, the liquid supply device of the present invention is a liquid because there is no pocket portion in the pipe line joint or the like as in the conventional liquid supply device. Even if the flow path of the magnetic paint is switched, it is possible to construct a piping line in which no liquid pool exists. Therefore, it is possible to flow a perfectly normal magnetic paint in the flow path from the service tank to the paint part, and even with a very delicate magnetic paint, it is possible to keep the desired magnetism and cause the magnetic paint to clump. Dropout and the like are eliminated, and it is possible to contribute to improving the quality of the magnetic recording medium. Moreover, since the number of valves required for the piping line configuration can be halved, various excellent effects can be obtained such that the facility cost of the liquid supply device such as the magnetic paint supply device can be reduced.

[Brief description of drawings]

FIG. 1 is a piping line of a magnetic paint supply device that is an embodiment of the present invention.

2 shows a three-way valve used in the piping line of the magnetic paint supply device shown in FIG. 1, where FIG. 2A is a cross-sectional view showing a switching state in one direction, and FIG. 2B is from the state of FIG. It is sectional drawing which showed the switching state to another state.

3 shows another three-way valve used in the piping line of the magnetic paint supply device shown in FIG. 1, where FIG. 3A is a cross-sectional view showing a one-way switching state, and FIG. It is sectional drawing which showed the switching state from the state to another state.

FIG. 4 is a piping line of a magnetic paint supply device which is a type of liquid supply device of the related art.

[Explanation of symbols]

2 Magnetic paint supply device (liquid supply device) ST service tank P21, P22 pump F filter T21 to T36 piping V31 to V33, V35 three-way valve (L-shaped) V34 three-way valve (T-shaped) DN21 to DN25 drain 45 handle A 1st pipe connection port B 2nd pipe connection port C 3rd pipe connection port

Claims (2)

[Claims] 1. A liquid supply source and a liquid supply device for supplying a liquid from the liquid supply source to a receiving portion through a pipeline, wherein the pipeline is composed of a plurality of pipes, and at least at one location. A liquid supply device characterized in that there is a branch passage, the branch passage is connected by a three-way valve, and the flow passage of the liquid is switched from one pipe to the other pipe by switching the direction of the three-way valve. . 2. A liquid supply source, and a liquid supply device that supplies liquid from the liquid supply source to a receiving unit through a piping line and to the liquid supply source through a circulation piping line, wherein the piping lines include a plurality of pipes. It consists of
Further, there are branch passages at at least two places, and among the branch passages, a three-way valve forming a T-shaped passage is connected to the receiving portion which is the first branch passage and the branch passage to the liquid supply source. , Second
A three-way valve forming an L-shaped flow path is connected to a branch path of the above, and the flow path of the liquid is switched from one pipe to the other pipe by switching the directions of these three-way valves. Liquid supply device.