JPH0397467A - Dialyzing liquid preparing apparatus - Google Patents

Abstract

PURPOSE:To obtain a dialyzing liquid preparing apparatus having a simple structure and a high safety by laying a communication pipe line in which a mixing pump is incorporated, between a source liquid metering tank and a mixing tank. CONSTITUTION:Each of source liquid metering tanks 14, 15 has a box-like shape having its upper part opened, that is, the top opening constitutes an overflow section 14a, 15a. A communication pipe line 16 is laid between the insides of the metering tanks 14, 15 and a mixing tank 13. One end side of the communication pipe line 16 is inserted in the metering tanks 14, 15, and is incorporated therein with a mixing pump 16a. With this arrangement, no pipe line for feeding meters source liquid to the mixing tank is required. Thereby it is possible to completely eliminate the trouble of blocking between the metering tanks and the mixing tank which would otherwise be caused by deposition of the source liquid.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a device for preparing dialysate for use in artificial kidneys, known as hemodialysis machines.

"Prior Art" Since the amount of dialysate required for dialysis treatment is extremely large, a highly concentrated dialysis solution is usually diluted before use.

There are two types of dialysis fluid production equipment that dilutes the stock solution for dialysis: one that uses a metering pump to continuously mix the stock solution and diluted water at a predetermined flow rate; After that, there is a type of device that dilutes this to a predetermined concentration in a mixing tank.

The former device, which uses a metering pump, takes into account the risk of an error in the dilution level if a failure occurs in the bomb system.

On the other hand, the latter type of device, which performs pre-weighing, has the advantage of not having such a risk.

Figure 5 shows the latter type of dialysate g using a metering tank.
This figure shows a conventional example of manufacturing equipment. This device consists of a mixing tank 2 connected to a dilution water supply path 1h, an A stock solution meter (n tank 4) connected to an A stock solution supply channel 3, and a B stock solution measuring tank 6 connected to a BJil supply channel 5. The stock solution crushed in the total A tank 4.6 is sent to the mixing tank 2 via outflow pipes 4a and 6a provided with electromagnetic valves 4b and 6b.

In order to prepare a dialysis limb using this dialysate evaporation device, first, stock solutions A and B are respectively injected into the measuring tank 4.6 from the stock solution supply lines 3 and 5. When the liquid level of the injected original limb rises and the level switches 4c and 6c are turned on, the solenoid valves 3a and 5a of the original liquid supply path 3.5 are closed and the supply of the original limb is stopped. The measurement of the protolimb and stock solution B is completed. While measuring the stock solution in this way, the dilution water supply path l
A small amount of dilution water is poured into the mixing tank 2. After the preparations are completed in this way, the solenoid valves 4b and 6b of the metering tank 4.6 are opened to inject the crushed stock solution into the mixing tank 2. Inject dilution water into the mixing tank 2 in advance {this is to avoid direct mixing of the A and B stock solutions.

After injecting the dilution water and stock solutions A and B into the mixing tank 2 as described above, additional dilution water is injected until the liquid level in the mixing tank 2 reaches the level switch 2a. The pump 7a of the stirring pipe 7 connected to the bottom and the top 1 is operated to flow the liquid in the mixing tank 2 to promote mixing.

The dialysis limb obtained by uniformly mixing the dilution water and the stock solutions A and B in this way is sent to the dialysis machine by opening the solenoid valve 2c of the dialysate supply pipe 2b.

“Problems to be Solved by the Invention” In such a conventional dialysate preparation device, the outflow t4
There is a concern that the electromagnetic valves 4 b and 6 b provided in the a and 6 a are easily clogged with components precipitated from the concentrated stock solution, and that the measured stock solution may not be completely sent to the mixing tank 2 . For this reason, in the conventional dialysate preparation apparatus, it was necessary to pay attention to the maintenance of the portion between the stock solution measuring tank 45 and the mixing tank 2 in order to keep the concentration of the dialysate stable.

Furthermore, the conventional dialysate preparation apparatus has a drawback that it has a large number of component parts.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a dialysate preparation device with a simple structure and higher safety.

"Means for Solving the Problems" In the dialysate preparation device of the present invention, the mixing tank to which the dilution water supply line is connected has an overflow part, and the stock solution measuring tank has an overflow section and is connected to the filtration stock solution supply line. accommodates,
By arranging a communicating pipe line equipped with a mixing bomb between the inside of the stock solution measuring tank and the inside of the mixing tank,
Achieved the above objective. accomplished.

"Function" When adjusting dialysate with this dialysate adjustment device,
First, the stock solution is sent from the dialysis stock solution supply line to the stock solution measuring tank. On the other hand, dilution water is also injected into the mixing tank from the dilution water supply line. When the mixing bomb in the communication pipe is operated in this state, the diluted water in the mixing tank flows into the stock solution measuring tank. Then, the undiluted solution stored in the Genzoku Keikake tank flows out from a part of the overflow port of the tank and flows down into the mixing tank. The flowing stock solution mixes with dilution water in the mixing tank. When the mixing bomb continues to operate and the solution continues to circulate through the communication pipe, mixing of the dilution water and the limb is promoted.

Next, when discharging the dialysis limb adjusted in the above manner from the mixing tank, if the liquid level in the mixing tank becomes lower than the level of the solution remaining in the stock solution measuring tank, the stock solution measurement is stopped due to a siphon phenomenon. Since the solution in the tank flows backward through the communication pipe line and moves to the mixing tank side, when the pouring of the permeate liquid in the mixing tank is completed, the dialysate in the stock solution measuring tank is poured out.

"Example" Hereinafter, the dialysate preparation device of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an implementation of the dialysate preparation device of the present invention, including a mixing section IO, a dilution water supply hole I1, and a dialysate storage section I2.
It is roughly composed of.

Mixing tank 10 has mixing tank l3 and A stock liquid meter It tank l.
4 and B stock solution measuring tank 15 and series 1i! t pipe line l6. The mixing tank l3 has a dilution water supply l! Dilution water supply pipe 1 for supplying dilution water from
7, a liquid sending pipe l8 for sending the prepared dialysate to the dialysis limb storage part [2], a drain pipe l9 for discarding the solution with poor concentration, and an overflow pipe 20 for discarding the overflowing limb. , the cleaning liquid supply pipe 2L that supplies acetic acid to remove dirt in the mixing tank 13, and the mixing tank! A disinfectant supply pipe 22 for supplying a chemical solution for disinfecting the inside of the disinfectant 3 is connected to the disinfectant supply pipe 22 . Also, this mixing tank 13
Inside, there is a mixing bomb 16 of the continuous a pipe line 16, which will be described later.
A mixing start level switch 13a for detecting the liquid level at which the drive of the tank a is started, and a dilution water measuring level switch tab for detecting the liquid level at which the supply of dilution water from the water tank 3l, which will be described later, is stopped. and is provided.

Also, in this mixing tank 13, the above-mentioned stock solution measuring tank 1 is provided.
4.15 is accommodated. These stock solutions 5t tank 1
4.15 is box-shaped with an open top, and the top openings are overflow holes 14a and 15a. Further, these stock solution measuring tanks 14 and 15 are provided back to back, and a partition wall 23 is provided between them that extends above the first bar flow portions 14a and 15a. These stock solution measuring tanks 14 and 15 are arranged approximately in the center of the mixing tank 13. In addition, the A stock solution measuring tank I4 contains A stock solution 0.
(The supply line 25 is pushed in, and the B stock solution measuring tank l
5, an n stock solution supply line 26 is inserted. Further, each stock solution measuring tank 14.15 has a stock solution measuring level switch 14b. I
5b is provided.

A communication pipe 16 is installed between the inside of these stock solution measuring tanks 14, 15 and the mixing tank 13. One end of the communication pipe l6 is divided into two branches and inserted into each of the stock solution measuring tanks 14 and 15. Their tips reach near the bottom of the limb meter III tank 14.15. On the other hand, the other end of the communication pipe I6 is connected to the mixing tank l3.
is connected to the bottom plate side of the A mixing pump 16a is provided in this communication pipe l6, and a mixing tank 1
The liquid at the bottom of No. 3 can be sent into the stock solution measuring tank 14.15. A magnetic drive bomb is used for this mixing pump 16a. Further, this communication pipe line l6 is provided with a degree meter 27 for determining the concentration of the liquid flowing through the communication pipe line 16.

The liquid sending w18 connected to the mixing tank l3 sends the dialysate prepared in the mixing tank l3 to the supply tank 37 of the dialysate storage section 12, which will be described later, using a siphon phenomenon. This liquid feeding pipe 18 once rises from the bottom of the mixing tank 13 to the top of the mixing tank 13, is pulled out to the outside of the mixing tank 13, descends, and is guided to the supply tank 37 of the dialysate storage section l2. . This liquid sending pipe
The end of No. 8 on the mixing tank 13 side is connected to the stock solution measuring tank 1.
It is located below the bottom of 4.15.

A trigger piping 29 equipped with a solenoid valve 29a is provided between the intermediate portion of the liquid feeding pipe l8 and the bottom of the mixing tank l3. As shown in FIG. 2, this trigger piping 29 is obliquely connected to the liquid feeding pipe l8 from above. This connection angle is set to about 60 degrees.

Said dilution water supply section! 1 is roughly structured by a heating tank 30 and a water storage tank 31. The heating tank 30 is a tank equipped with a heater 32. The Kisawa water heated to a predetermined temperature in the heating tank 30 is sent to a water storage tank 3l by a bomb 33. The water storage tank 31 is arranged above the mixing tank l3. This water storage tank 3I is provided with a level sensor 31a that detects the lower limit position of the water level of the stored dilution water, and a level sensor 3lb that detects the upper limit position. This water storage tank 31 and the mixing tank l3
and are connected by the dilution water supply pipe 17.

This dilution water supply pipe I7, like the liquid transport pipe I8, transports the liquid by utilizing the siphon phenomenon. This dilution water supply pipe 17 once rises from the bottom to the top of the water storage tank 3l, is pulled out of the water storage tank 3l, descends, and is drawn into the mixing tank I3. A trigger pipe 35 equipped with a solenoid valve 35a is provided between the intermediate portion of the dilution water supply pipe 17 and the bottom of the water storage tank 3l. As shown in FIG.
7 at an angle of about 60 degrees from above.

The ON dialysis limb holding portion I2 is a portion where the permeate Ffr solution prepared to a predetermined concentration in the a junction portion IO is temporarily stored before being sent to the dialysis machine. This dialysate storage section l2 is roughly composed of a supply tank 37 and a branch line 39. The supply tank 37 is arranged below the condition tank I3. Inside the supply tank 37, there is a warning level switch 37a that issues a warning signal when the stored amount of dialysate decreases unnecessarily, a preparation start level switch 37b that issues a signal to start preparing the dialysate, and a dialysate solution. A stop level switch 37c, which is made of a material that emits a signal to stop the preparation of the water, is attached. The liquid supply line 39 is connected to the bottom of the supply tank 37 . This liquid feeding line 39 includes a concentration meter 393 for checking the agricultural degree of the dialysis limb to be supplied, a supply pump 39b, and a valve 393.
9c is provided. A drain 4 equipped with a valve 40 is provided on the second flow side of the supply pump 39b of this liquid sending line 39.
l is connected. Further, a supply pressure adjustment line 43 is provided between the downstream side of the supply pump 39b and the supply tank 37. This supply pressure adjustment line 43 is provided with a supply pressure gauge 43a and a single supply pressure regulating valve 43b.

Next, the operation of this transected limb preparation device will be explained.

When adjusting the dialysate using this dialysate adjustment device,
First, the six stock solutions stored in the A stock solution storage tank 45 are
The A stock solution is supplied to the A stock solution measuring tank l4 via the stock solution supply line 25. At the same time, the daily stock solution stored in the B stock solution storage tank 46 is supplied to the B stock solution measuring tank 15 via the 13 stock supply line 26. When these liquid feeding amounts reach a predetermined amount, the stock solution measuring level switch 14. b, 15b detects this. Then, the valves 25a, 26a of each supply line 25, 26 are closed.

Next, the dilution water in the water storage tank 3L is supplied to the mixing tank 13. At this time, the solenoid valve 35a of the trigger pipe 35 connected to the dilution water supply pipe 17 is opened to insert dilution water into the downstream portion of the pipe 17. This triggers a siphon phenomenon, and the dilution water in the water storage tank 3L flows into the supply pipe 17.
and flows into the mixing tank 13. When the liquid level of the dilution water injected into the mixing tank I3 rises and the mixing start level switch 13a is turned on, the mixing bomb 16a of the communication pipe 16 is operated and the solution mixing process is started. In this step, the diluted water in the mixing tank 13 is sent to the stock solution metering tank 14.15 via the communication pipe 16. Then, the A stock solution and the B stock solution measured in the stock solution measuring tanks 1/1 and 15 flow out from the overflow part 14a15a of the tank 14.15 and flow down into the mixing tank 13. At this time, the partition wall 2 is between the stock liquid meter tank 14 and 15.
3, so before mixing with the dilution water,
The stock solution and B stock solution are never mixed directly.

The A and B streams that have flowed down in this way are mixed with the dilution water in the mixing tank 13, respectively. mixing bomb 16
By continuing the operation of step a and continuing the circulation of the melt through the communication pipe 16, mixing of the dilution water and the stock solutions A and B is promoted.

Injection of dilution water continues during this time. When the liquid level in the mixing tank 13 rises and the dilution water measurement level switch 13b is turned on, the solenoid valve 35a of the trigger pipe 35 connected to the dilution water supply pipe l7 is closed, and the water storage tank
The supply of dilution water from K is stopped. Then, when it is confirmed that the conductivity measured by the concentration meter 27 provided in the communication pipe 16 has stabilized at a predetermined value and that the dialysate of the desired concentration has been adjusted, the mixing pump 16a is stopped. Then, the solution mixing step is completed.

The dialysate draining process then begins. In this discharge process, first, the solenoid valve 2 of the trigger pipe 29 connected to the liquid sending pipe 18
9a is opened and dialysate is inserted into the downstream part of the branch pipe 18. Then, this serves as a priming water, causing a siphon phenomenon, and the dialysate in the mixing tank I3 is rapidly sent to the supply tank 37 of the dialysate ijI reservoir section I2 via the liquid sending pipe l8. During this period, when the liquid level in the mixing tank 13 drops below the liquid level of the solution remaining in the 5-ton stock solution meter tank 14.15, the molten liquid in the stock solution measuring tank 14.15 will flow into the communication pipe due to the zaihon phenomenon. It flows in the opposite direction through the passage 16 and moves to the mixing tank 13 side. As a result, when the pouring of the dialysate in the mixing tank 13 is completed, the stock solution measuring tank 14
．． The dialysate that was in step 15 is poured out. As described above, when the liquid level in the mixing tank 13 is discharged via the liquid sending pipe 18 and the trigger pipe 29, the discharging step is completed.

The dialysate sent to the supply tank 37 of the dialysate reservoir l2 as described above is temporarily stored there. Then, if necessary, the liquid is sent to a dialysis machine (not shown) via a liquid sending line 39 at a predetermined pressure.

If the solution mixed in the mixing tank l3 is not at the predetermined degree a, or if the mixing tank j3 is cleaned or extinguished? To drain the solutions used in the mixing tank I3 from the mixing tank I3, open the solenoid valve 47 of the trigger pipe 46 connected to the drain pipe I9 of the mixing tank 13, and discharge those solutions into the downstream part of the drain pipe I9. This serves as a priming water, and the solution is drained from the drain pipe 19 in a short period of time due to the siphon effect.

As described above, in this dialysate adjusting device, the mixing tank 13 houses the stock solution measuring tanks 14 and 15 having overflow parts 14a and 15a, and the stock solution measuring tank 1
4.15 and the mixing tank L3 is provided with a communication pipe l6 equipped with a mixing bomb 16a, so in the solution mixing process, the mixing bomb 16a of the communication pipe l6 is operated and the mixing tank 13 is The dilution water in the stock solution measuring tank 1 is sent to the stock solution measuring tank 14.15.
4.15 overflow part 14a. The stock solution and dilution water can be mixed by flowing down from I5a into the mixing tank 13.

On the other hand, in the dialysate discharge step in which the prepared dialysate is sent to the dialysate reservoir l2, the residual solution in the stock solution measuring tank 14.15 moves to the mixing tank l3 via the communication pipe I6 due to the Zyphon phenomenon.

Therefore, in this dialysate evaporation device, the stock solution measuring tank 14.
There is no need for a pipe line to send the high-concentration stock solution measured in step 15 to the mixing tank l3, and problems such as clogging of the electromagnetic valve due to precipitation of stock solution components, which have been a concern in the past, can be completely avoided. Therefore, with this dialysate preparation device, the burden of maintenance for keeping the concentration of dialysate stable is greatly reduced.

Further, since this dialysate preparation device has a simple structure, the number of structural parts can be reduced, and manufacturing costs can be reduced.

In addition, in this dialysate preparation device, the dilution water supply pipe 17 provided with trigger pipes 35 and 29 and the liquid supply pipe l8 allow water to be fed from the water storage tank 3l to the mixing tank l3 and from the mixing tank 13 to the supply tank 37. Since the liquid is sent using a siphon phenomenon, simply inserting a small amount of priming water into the downstream portions of the dilution water supply pipe 17 and the liquid delivery pipe 18 via the trigger pipes 35 and 29, each pipe 1 7, 1 8 be able to generate a large amount of flow.

Therefore, in this dialysate preparation device, }・Riga tube 35.29
Small-diameter solenoid valves 35a and 29a can be used, simplifying the structure of the device and reducing manufacturing costs.

(Other Embodiments) FIGS. 3 and 4 show the trigger tube 35 of the diaphragm folding device.
and dilution water supply pipe 17, or trigger pipe 29 and liquid sending pipe 1
8 shows another example of the structure of the connection part with 8. (In the following explanation, the structure of the connection between the liquid feeding tube 18 and the trigger tube 29 will be explained as the structure of the connection between the liquid feeding tube 18 and the trigger tube 29.) In the connection structure shown in FIG. The tip portion is bent into an I7 shape.

Further, in the connection structure shown in FIG. 4, a side pipe 49 is connected in a T-shape to the side surface of the night pipe I8, and a trigger 29 whose tip is bent into an L-shape is attached to the side pipe 49. is inserted. Further, a ring 50 is fitted at the tips of the two trigger tubes, and the opening area of the liquid feeding tube l8 is formed to be narrow at this portion.

If these connection structures are adopted, the above-mentioned tip example will be achieved! dialysis e. The same effects as the preparation device can be obtained.

"Effects of the Invention" As explained above, the dialysis Kl preparation device of the present invention has an overflow part in the mixing tank to which the dilution water supply line is connected, and a stock solution measuring tank to which the dialysis stock solution supply line is connected. is accommodated, and a communicating pipe line equipped with a mixing pump is disposed between the inside of the stock solution measuring tank and the inside of the mixing tank, so in the solution mixing process, the mixing bomb in the communicating pipe line is operated to mix the solution. By sending the dilution water in the tank to the undiluted solution measuring tank, the undiluted solution in the undiluted solution measuring tank is caused to flow down into the mixing tank from a portion of the overflow, and the undiluted solution and dilution water can be mixed.

On the other hand, in the dialysate discharge step in which the prepared dialysate is sent to the dialysate reservoir, the residual solution in the stock solution metering tank is moved to the mixing tank via the communication pipe by siphoning.

Therefore, in the dialysate preparation device of the present invention, there is no need for any pipe line to send the measured stock solution to the mixing tank, and it is possible to completely avoid the trouble of clogging between the measuring tank and the mixing tank due to precipitation of stock solution components. Therefore, with the dialysate preparation device of the present invention, the burden of maintenance for keeping the concentration of dialysate stable is greatly reduced.

Furthermore, since the dialysate preparation device of the present invention has a simple structure, the number of component parts can be reduced, and manufacturing costs can be reduced.

[Brief explanation of drawings]

Fig. 1 is a configuration diagram showing an embodiment of the dialysate refrigeration device of the present invention, Figs. The figure is a schematic diagram showing the main parts of a conventional dialysate preparation device. l3...Mixing tank, 14...A stock solution measuring tank,
l4a... Part of Saiichi barflow, l5... B stock solution measuring tank, 15a... Part of overflow, ■6... Communication pipe, 16a... Mixing pump, 17... Dilution water Supply pipe, 25... A stock solution supply line, 26...
B stock solution supply line.

Claims (1)

[Claims] A stock solution measuring tank having an overflow part and connected to a dialysis stock solution supply line is housed in a mixing tank to which a dilution water supply line is connected, and mixing is carried out between the stock solution measuring tank and the mixing tank. A dialysate preparation device characterized in that a communication pipe line equipped with a pump is provided.