JPS61115900A - Method of filling inside of piping with liquid - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to liquid transfer in a pipe system between liquid tanks, and more specifically, liquid filling and degassing in a pipe system between liquid tanks prior to liquid transfer. Regarding.

BACKGROUND OF THE INVENTION Liquids are often transferred from one liquid tank to another, or by a purpose-designed piping system to processing equipment.

As long as the liquid transfer is just a matter of transferring the liquid or transferring the amount, the presence or amount of large bubbles or minute bubbles in the pipe system is not a problem, but the transfer amount/time, that is, the transfer amount. If speed or supply speed to other species is a problem, for example, the reaction liquid stored in one liquid tank may be added to the reaction liquid in another liquid tank, or the finished liquid in one liquid tank may be added to the reaction liquid in a continuous processing process. When supplying equipment to a fixed area or a fixed volume, especially when the time is limited to minutes or seconds, or when the supply unit is a precise small quantity, the pipe system between the two tanks is difficult. Not only the amount of bubbles inside the product, but also the amount of time the product is busy, will affect the reaction between the two liquids, or will cause variations in processing accuracy, resulting in defects in the product.

To simplify the following description, the liquid tank storing the liquid to be transferred will be referred to as the supply tank, and the liquid tank or processing equipment that receives the transferred liquid released through the pipeline system will be referred to as the processing tank. Conventionally, when there is a sufficient head difference between the liquids in the supply tank and the processing tank, air removal from the pipe system can be satisfactorily carried out by conventional air removal techniques.

However, when the liquid heads of both tanks are at the same level, it is extremely difficult to vent air, and a means to eliminate this difficulty has been proposed in 2.3. For example, U.S. Patent No. 3,821°002 discloses a method for creating circulation piping in which a bypass line is provided in a piping line system, and Japanese Patent Application Laid-open No. 49-65824 discloses a method in which a bypass line is provided in a piping line system, and Japanese Patent Application Laid-open No. 49-65824 discloses a method for using reduced pressure saturated steam in a pipe line. It shows how to meet the requirements. Furthermore, Japanese Patent Application No. 58-97229 proposes a method in which the pipe system is filled with pure water, and the pipe is filled with the transferred liquid without introducing air bubbles while pushing the pure water away first with the transferred liquid. has been done.

However, since the method of providing a bypass has a circulation path, it is complicated in terms of equipment and has problems such as residual liquid in the piping.

In addition, a pump is required to ensure circulation, and pulsation of the pump poses a problem when precisely controlling the flow rate.

Using a pump increases dead space, making it difficult for air to escape from the line and taking time.Also, it tends to create microbubbles, leaving the problem that air bubbles are difficult to escape from the line.
In addition, the method of filling with reduced pressure steam requires reduced pressure steam, which requires generation of reduced pressure steam, and also requires deaerated water, so the equipment is complicated and the initial cost and running cost are high. becomes a problem.

Furthermore, the method of filling the pipe with pure water is to fill the pipe with pure water in advance, and then use the transfer liquid to push out the pure water and replace the inside of the pipe, so the transfer liquid is pumped until it becomes the regular transfer liquid. Since it has to be discharged out of the system, there is a loss of the transferred liquid, so it is applied when the internal volume of the pipe is small, and it may be somewhat lacking in membrane properties.

(Object of the invention) As described above, the liquid heads of the supply tank and the processing tank are
There are still many unsatisfactory points in liquid filling that eliminates air bubbles in the piping system between both tanks when they are at the same level.On the other hand, from the standpoint of efficient use of space, the liquid tanks are placed at the same level in #1. The demands are great.

Therefore, an object of the present invention is to provide a method for filling a liquid in a pipe system piped between liquid tanks arranged at the same level without creating air bubbles in the pipe system. The object of the present invention is to provide a reed and a piping configuration to which the method can be applied.

(Structure of the Invention) The object of the present invention is to provide a pipe for transferring a liquid, which has a receiving valve and a releasing valve at the receiving end and the discharging end of the liquid to be transferred, respectively, which serve to open and close the pipe. The piping shall be equipped with a relief chamber for the gas in the piping at a location higher than either the receiving valve or the discharge valve, and the piping shall be operated in the following order: (a) Pressurize the liquid to be transferred and open the receiving valve. (b) Pressure-fit the piping into the trap inside the piping, and close the receiving valve;
(c) A method of filling liquid into a pipe by repeating an operation unit consisting of opening the relief valve in a state where the relief valve is exposed and releasing the gas in the pipe, and (c) closing the relief valve. In the present invention, the state in which the relief valve is exposed to the gas in the piping line means that when the liquid to be transferred is pressurized and pressurized into the piping line, the pressurized liquid still escapes. When the liquid does not reach the valve position, and when it passes the relief valve position and closes the intake valve, and the liquid does not fill the pipeline to the discharge valve, the liquid replaces the gas due to gravity, and the gas rises. This refers to the state in which the relief valve is at its highest position.

Next, the present invention will be explained with reference to the figures.

FIG. 1 is a block diagram showing a piping line system used in the method of the present invention.

In the figure, 1 is the supply tank, Ll is the liquid (including suspension) stored in the supply tank 1 and to be transferred, hl is the head where the liquid L1 is shown in the supply tank 1, and 12 is the external part of the supply tank 1. from liquid L
It is a pipe for introducing gas at a pressure p to pressurize the air conditioner 1, and is equipped with an on-off valve 121.

Pa means atmospheric pressure.

3 is a processing tank, and L3 is a liquid received in processing tank 3. It may be the same type of liquid as the liquid L1, or it may be a reaction or a mixture of L+ and another liquid. . h3 is the head indicated by the liquid L3, and 32 is the head indicated by the gas in the processing tank, which is the atmosphere P.
It is a pipe for communicating with the outside of a, and is equipped with an on-off valve 321.

2 is a pipe system of piping from the supply tank 1 to the processing tank 3,
Reference numeral 11 designates a receiving valve for receiving the liquid L1 into the pipe line system 2, and reference numeral 31 represents a discharge valve for discharging the liquid L1 introduced into the pipe line system 2 into the processing tank 3. 21 and 23 are conduits, of which conduit 2
A gas relief valve 22 is provided at the junction between 1 and 23.

The relief valve 22 is located at a higher place than either the receiving valve 11 or the discharge valve 31, and by opening the relief valve, atmospheric pressure P is released.
The inside of the conduit can be passed to the outside of a.

Further, 24 is a flow control valve such as a needle valve for regulating the flow rate in the pipeline system 2, and 24 is a flow meter in the pipeline system 2.

FIG. 2 shows an example in which the piping system according to the present invention is applied to an apparatus for producing a silver halide photographic emulsion.

From the supply tank 1 to the processing tank 3 in FIG. 1, there are two completely similar pipe systems for the processing tank 3.

The liquids LL and Ll' are filled into the piping line system in the same way i as in FIG. 1, respectively.

Liquid Ll is a silver nitrate solution (or halide bath number), liquid Ll is a halide solution (or silver nitrate solution), liquid L3
is the reaction solution. 'Furthermore, FIG. 3 shows an example in which the piping system according to the present invention is applied to a coating apparatus for photographic light-sensitive materials.

The flow from the supply tank 1 to the processing tank 3 up to the discharge valve 31 in Fig. 1 is exactly the same, and beyond that is the slide hopper 3 of the coating device.
It has been replaced by a. 4 is a coating roller, and 5 is a web on which the photographic emulsion is applied.

Next, the procedure for filling the piping system 2 with liquid will be explained with reference to the flowchart shown in FIG. 4. □First, the receiving valve 11, the relief valve 22, and the discharge valve 31 are closed when the supply tank 1, piping system 2, and processing tank 3 are empty (processing 1). Next, liquid 'L1 is put into supply tank 1 (process 2). Following this, the operation of filling the pipe system 2 with liquid starts from the next process. First, the liquid L1 is pressurized by introducing gas at a pressure p into the supply tank, the receiving valve 11 is opened (process 3), and the liquid L1 is pressurized into the pipe system 2 (process 4).

The pressure applied at this time p Fii' ~ 10 Kf /
c'd G, and considering the pressure resistance of the device, preferably 1 to 3 KIi/crd G, and further 2 to 4 F/crd to remove the supply tank from the range of No. 2 pressure vessels stipulated by law.
Preferably, it is less than dG. Further, if the liquid L1 is easily oxidized, an inert gas such as nitrogen may be used.

After the liquid L1 is pressurized into the pipeline system 2, the receiving valve 11 is closed (process 5). In this case, either the liquid Ll has not reached the relief valve 22 or has passed the position of the relief valve 22 and entered the pipe line 23. In the former case, the liquid Ll has not reached the relief valve 22.
In the latter case, the liquid L1 flows toward the release valve 31 due to its own weight and replaces the gas in the pipe, until the relief valve 22 is exposed to the gas. Ru. This state is recognized by means such as providing a pressure-resistant viewing window at the bottom of the relief valve 22 (Judgment 1 and Process 6). When the relief valve 22 is opened and the relief valve 22 is exposed, the compressed gas inside the pipeline escapes to the atmosphere, and the pressure of the gas inside the pipeline becomes the external pressure P.
becomes equal to a (process 7) O is then closed (process 8
).

The liquid Ll is introduced into the pipe line system 2 by the operations shown in the processing box and the judgment box, but whether or not the liquid Ll is completely filled in the pipe line system 2 by the coughing operation is determined by checking, for example, the lower part of the relief valve 22. (Judgment 2).

If the pipeline system 2 is not yet filled, the operation units from process 3 to process 8 and judgment 2 are repeated as a loop.
be fed.

When the pipe system 2 is filled with the liquid L1, the receiving valve 11 and the discharge valve 31 are opened (processes 9 and 10), and the liquid Ll in the supply tank 1 passes through the pipe thread 2 according to the present invention. and transferred to the processing tank 3 without containing any air bubbles.

Note that the gas remaining in the pipeline near the relief valve 22 may be released by opening the relief valve 22 prior to transfer, but as long as the pressure in the supply tank 1 is maintained, there is no problem in leaving it as it is. .

In addition, there are no restrictions on the diameter of the pipe used in the pipe system, and it can be freely determined according to the required flow rate.Normally, the flow velocity in the pipe is 2.
m/511c8W, K taken.

Furthermore, it is self-evident that sensors for detecting temperature, pressure, flow rate, etc., and control devices for controlling the pipe system according to the present invention may be interposed as necessary, and further, filters, etc. It is also possible to provide a transfer liquid purification device or a mechanism for heat retention.

In an embodiment according to the present invention, the supply tank (1. to the relief valve 2.
The pipe system leading to 2 has an upward slope so that the transferred liquid flows upward as much as possible, and the pipe system leading from the relief valve n to the processing tank 3 allows the transferred liquid to descend as much as possible. It is preferable that the pipes are arranged with a downward slope so that the pipes flow smoothly, and it is also preferable that each slope of the pipe is as steep as possible. This is because it is possible to shorten the time until the relief valve is exposed to the gas in one pipe after the transferred liquid has been pumped into the pipe system.

Further, the position of the gas relief valve only needs to be higher than either the receiving valve or the discharge hole ρ, and is not limited by the head h1 and hsK.

Furthermore, the present invention is not limited to providing a plurality of piping line systems according to the present invention in a processing tank.

(Effect of the invention) At the same time, the object of the present invention is achieved, and at the same time, the supply tank, the processing tank,
It can be installed freely without having to worry about the arrangement of the equipment, saving space as a whole and making it more compact.

[Brief explanation of drawings]

FIGS. 1, 2, and 3 are block diagrams showing a piping line system used in the method of the present invention. FIG. 4 is a flowchart showing the procedure of the method of the present invention. DESCRIPTION OF SYMBOLS 1... Supply tank, 11... Receiving valve, Ll... Liquid to be transferred, 2... Pipe line system, 21 and 23... Pipe line, 22... Relief valve, 3... ...Processing tank, 31...Discharge valve, L3...Receiving liquid.

Claims (1)

[Scope of Claims] A pipe for transferring a liquid has a receiving valve and a discharge valve at a receiving end and a discharging end of the liquid to be transferred, respectively, for opening and closing the pipe line, and the receiving valve and the discharge valve The piping is equipped with a relief valve for the gas in the piping at a higher location than either of the pipes, and the following steps are carried out in the piping: (a) Pressurize the liquid to be transferred, open the receiving valve, and pressurize it into the piping. , close the receiving valve; (b) open the relief valve to release the gas in the pipeline in a state where the relief valve located at a high place in the pipeline is exposed to the gas in the pipeline; (c) A method of filling a pipe with liquid by repeating a unit of operation consisting of closing a relief valve.