JPH0212611Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a bubble trap installed in the suction line of a sample liquid sending pump in a liquid analyzer.

Plunger pumps and diaphragm pumps are frequently used as sample introduction means for liquid analyzers. In particular, the former method has many achievements because it allows the sample to be delivered under high pressure and with good quantitative performance. If air bubbles enter the plunger chamber, plunger pumps will fail to feed liquid, so plunger pumps are usually equipped with a valve trap in the suction line to remove air bubbles from the liquid.

FIG. 1 is an explanatory diagram of the configuration of a conventional bubble trap. Bubble trap 1, transparent pipe 2,
It consists of joints 3 and 4 and flexible tubes 5 and 6, and is configured such that tube 5 is immersed in liquid in tank 8 and tube 6 is connected to suction port 10 of pump 7.

In the case of the plunger pump equipped with the conventional bubble trap 1 described above, the plunger chamber and suction line 9 are filled with air during the first operation, so even when the plunger pump 7 is driven, the air is compressed. Only when the liquid is not pumped. For this reason,
Normally, during operation, the following priming operation is performed.

Remove the tube 6 from the suction port 10, suck the liquid in the tank 8 with a syringe, etc., fill the tube 6 etc. (suction line 9) with the liquid, and connect the tube 6 to the suction port 10 again (priming operation and To tell).
After that, loosen the discharge side joint of the plunger pump 7 head and start operation. Now, if the tank 8 is located higher than the plunger pump 7, the liquid will enter the plunger pump 7 due to the difference in water head, and the air in the plunger chamber can be discharged. After all the air has been expelled, tighten the pump head output fitting.

However, priming operations in such conventional bubble traps are complicated and time consuming.
Another problem is that water leaks from the joints etc. during the priming operation, staining the surrounding area. Further, the above-mentioned priming operation is required even during operation if air bubbles enter the pump head. For this reason, there has been a strong desire to simplify the priming operation.

The present invention has been devised in view of the above, and an object of the present invention is to provide a bubble trap having a priming mechanism consisting of a defoaming cylinder insertion port and a check valve in order to facilitate the priming operation.

The present invention will be described below with reference to the drawings.

FIG. 2 is an explanatory diagram of the structure of a bubble trap according to an embodiment of the present invention.

The main part of Bubble Trap 11 is the body 12.
, a transparent pipe (bubble trap part) 13, and joints 14 and 15. The body 12 has a connection port 16 that connects the joint 14, a connection port 17 that connects the inlet of the plunger pump 7 via the tube 6, and a port into which a defoaming syringe (not shown) is inserted. In the non-inserted state, the syringe insertion port 19 is closed with a blind stopper 18, the passage 20 communicates between each connection port and the syringe insertion port, and the passage 20 (specifically, the surface of one end of the joint 14 in FIG. 2 and the body). 1
A grooved tip 22 and a ball 23 are installed in a stepped portion 21 formed at a portion (where the liquid flowing through the flow path formed by 2 joins the liquid flowing through the passage 20).
and has. The stepped portion 21 extends the flow path of the AC portion (specifically, a certain distance portion of the flow path formed by the one end surface of the joint 14 and the body 12 in FIG. 2 on the side that contacts the passage 20). A step is formed to narrow the gap, and the grooved tip 22 comes into contact with this step and is stopped. The joint 14 is connected to the body 1
2 and the transparent pipe 13, an opening 25 (usually forming a tapered opening) forming one end of the passage 24 is connected with the ball 23 to form a check valve mechanism (i.e. , channel 24
A mechanism for causing liquid to flow in the direction of the passageway 20 and preventing the liquid from flowing in the opposite direction is configured. The joint 15 is configured to communicate the tank 8 and the transparent pipe 13 via the tube 5.

The priming operation in the bubble trap 11 is performed by removing the blind stopper 18 and inserting the syringe into the insertion port 1.
9 and operate the piston part of the syringe. By this operation, the liquid in the tank 8 can be sucked and sent to the plunger pump 7, and the air present in the tube 6 of the suction line can be removed. Further, by the above operation, even if there are bubbles in the transparent pipe (bubble trap section) 13, the bubbles can be removed.

In addition, in the above embodiment, the plunger pump 7
Although there is no explanation about the configuration of the discharge line, a flow path is provided that bypasses the detection section of the analyzer (that is, the section that detects the components of the liquid discharged from the plunger pump 7), and during the above-mentioned priming operation, By switching the discharge line to the bypass side, air bubbles remaining in the discharge line can also be discharged.

FIG. 3 is an explanatory diagram of the structure of a bubble trap 11' according to another embodiment of the present invention. Each reference numeral in FIG. 3 has the same meaning as that in FIG. 2. The feature of this embodiment lies in the structure of the body 12'. That is, a check valve mechanism including a ball 23 and the like is provided at the end of the syringe insertion port 19. The check valve mechanism is provided to prevent backflow during syringe operation, so the configuration shown in Figure 3 is better than the second one.
It can be said that it is functionally superior to the one shown in the figure.

Note that the above-mentioned backflow prevention means does not need to be a check valve, and a valve may be provided in the passage 20.

As described above in detail, the bubble trap of the present invention has a syringe insertion port and a backflow prevention means, so that the priming operation can be performed easily.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the configuration of a conventional bubble trap, FIG. 2 is an explanatory diagram of the configuration of a bubble trap according to an embodiment of the present invention, and FIG. 3 is an explanatory diagram of the configuration of a bubble trap according to another embodiment of the invention. be. 11... Bubble trap, 12, 12'... Body, 13... Transparent pipe (bubble trap part),
19... Syringe entry port, 22... Grooved tip, 23... Ball, 24... Passage, 25... Tapered (funnel-shaped) opening.

Claims (1)

[Claims for Utility Model Registration] In a bubble trap installed in a suction line of a pump, the bubble trap is provided at an end of a first passage in the bubble trap and closes an opening on one side of the first passage to allow entry into the first passage. a backflow prevention means for preventing backflow of liquid; and a second passageway having an inverted T shape that communicates the first passageway with the suction port of the pump, and blocking an opening of the second passageway facing the suction port of the pump. A bubble trap characterized by comprising a syringe insertion port into which a defoaming syringe is inserted.