JPS62180711A - Deaerator - Google Patents

Abstract

PURPOSE:To efficiently enable deaeration and to enable small sizing by means of a simple device by winding a flexible flow path pipe having gas permeability in a spiral plane shape at the prescribed interval and providing it to the inside of a tank wherein the inside is evacuated. CONSTITUTION:A flexible flow path pipe 19 wherein it is excellent in gas permeability and superior in chemical resistance and liquid to be deaerated is fluidized in the inside thereof is formed into a plate shape in a nearly spiral shape. In this case, the prescribed distance is kept in such an interval that the adjacent inner and outer peripheral pipes are not approached or brought into contact with each other. This flow path pipe 19 is provided to the inside of a deaerated tank wherein the inside is evacuated. The liquid to be deaerated in the flow path pipe 9 is efficiently subjected to deaerating action in the vacuum atmosphere of the inside of the deaerated tank 20. Further when the flow path pipe 19 is housed in the grooves of the wire gauzes 1a, 1b, the wall of the flow path pipe is preferably made thin.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application]: The present invention relates to improvement of a degassing device such as an automatic biochemical analyzer or a liquid chromatograph.

[Conventional technology]

In general, in automatic biochemical analyzers, air dissolved in reagents foams in the flow pipe due to temperature changes, etc., and when it stagnates especially near the reagent dispensing device, incompressible fluid becomes compressible fluid. As a result, the volume of the positive displacement dispensing device fluctuates, reducing the accuracy of the amount. In addition, in liquid chromatography,
The air bubbled in the flow path makes it impossible to obtain a steady flow, which will fatally increase detection errors. Conventionally, for this purpose, Japanese Patent Application Laid-Open No. 51-28261, Japanese Patent Application Laid-Open No. 54-12
No. 3785 and Japanese Unexamined Patent Publication No. 165007/1987 have been proposed.

However, no matter how highly gas permeable a material is used to form the flow path, the currently known gas permeability means that the length of the flow path will be long in order to obtain the required amount of deaeration. is unavoidable. For this reason, in Japanese Patent Application Laid-Open No. 51-28261, the entrance and exit of the flow path is made into a branched structure, and the flow path pipe is divided into two.
Problem □ is solved by parallelizing the above. Also, JP-A-5
No. 4-123785 and Japanese Unexamined Patent Application Publication No. 57-165007 solve the problem by winding the flow pipe into a coil shape. Of course, creating a branched structure at the inlet and outlet of the flow channel is the same even when the channel is long, but it is difficult to use a reagent for an automatic biochemical analyzer that deteriorates in a short period of time and is expensive. When replacing the liquid to be degassed with a fresh one, it becomes difficult to quickly replace a small amount of reagent. That is, reagents that need to be replaced are likely to accumulate in the branch structure. Also,
In the structure where the flow pipe is wound into a renoid coil,
Due to space constraints, the pipes may come close to each other in the axial direction and come into contact with each other, resulting in poor deaeration efficiency.

[Problem that the invention seeks to solve]

In the above-mentioned conventional structure, in order to obtain a predetermined amount of deaeration, a long flow path tube is required. However, there were problems such as the large structure, low degassing efficiency, and poor handling. For this reason,
The present invention improves the arrangement and support structure of flow path pipes, and supports them in a spiral plane so that adjacent pipes maintain a predetermined interval and do not come into contact with each other. The object of the present invention is to provide a degassing device which can perform good degassing and increase the amount of degassing, has a simple structure, is miniaturized, and can perform degassing efficiently.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention aims to solve the above problems.

A flexible channel tube that has good gas permeability and excellent chemical resistance and allows the liquid to be degassed to flow inside, and an interior that houses the channel tube and is the outside of the channel tube. A deaeration tank formed to be evacuated is not provided, and the flow path pipe is maintained in at least one layer in a substantially spiral planar shape with a predetermined distance between the adjacent circular outer circumferential pipes. It is being formed.

[Effect]

The flow path pipe 19 is not formed into a spiral shape and a flat plate shape, but is maintained at a predetermined distance from adjacent circular outer circumferential tubes without being close to each other or in contact with each other. The liquid to be degassed in the pipe 19 is efficiently degassed in the vacuum atmosphere in the deaeration tank 20.

Furthermore, since the channel tube 19 is housed in the groove 28 of the wire meshes 1a and 1b, the channel tube wall can be formed thinly, and the material of the channel tube 19 is a dissolution-diffusion type homogeneous membrane. In other words, the dissolved air (represented by oxygen because it is simply ffi) in the liquid to be degassed in the flow path pipe 19 per unit time (t) K'1i
The amount (cr) transmitted through the iF wall is expressed by equation (1).

However, K:: Oxygen permeability coefficient ΔP: Average partial pressure difference of oxygen inside and outside the flow pipe S: Wall thickness of the flow pipe ′ d and equivalent diameter of the flow pipe t□: Length of the flow pipe: A: Gas permeation rrJ product - In the present invention, since the outer walls of the flow path pipes 19 are arranged in spaces that do not touch each other, the gas permeation area is 2πd/
Deaeration is performed from the entire surface so that it is equal to (same as the theoretical value), and the wall thickness of the flow path tube 19 is further reinforced by reinforcing the outer periphery of the flow path tube 19. S can be thinned and oxygen permeability can be improved.

[Example] □□ Hereinafter, the deaerator of the present invention will be shown in Fig. 1 using an example.
explain. FIG. 1 is an explanatory diagram showing only the deaeration tank in cross section. In the figure s1. I'a, 11 is a wire mesh, 2a, 2b are entrances, 3a, 3b are exits.

4 is a spacer, 5 is a shaft, 6.7 is an end plate, 8 is a cylinder, 10
is 0 linog and 11 is screw. Also.

12 is an exhaust port 1, 13 is a vacuum pump, 14 is a motor for driving the vacuum pump, 15 is a vacuum switch, 16 is a control, and 20 is a degassing tank. Wire mesh 1 has a plan view as 2nd
As shown in the figure and a partial cross-sectional view shown in the third figure, the groove 28 has a substantially spiral shape (including an Archimedean spiral shape).
As shown in FIG. 3, the channel tube 19 is inserted into the groove 28, and the channel tube 19 is prevented from being displaced. The flow path pipe 19 has good gas permeability, excellent chemical resistance, and flexibility, and allows the liquid to be degassed to flow inside. ! 4 is a cross-sectional explanatory opening of the same part as the wire mesh portion in FIG. The inlets 2a, 2b and the outlets 3a, 3b are hermetically fixed through the tube 8. The wire meshes 1a, lb and the base f'4 are fixed to a shaft 5 passing through the center, and the shaft 5 is fixed concentrically to the cylinder 8 by screws IIK between end plates 6 and 7.

These joints are held airtight by 017 rings 9 and 10.

An exhaust port 12 is opened in the steel plate 7, and the steel plate 6.7 and the cylinder 8
A degassing tank 20 is formed by the vacuum tank 13. The vacuum switch 15 is connected to a vacuum switch 15, and the vacuum switch 15 is activated when the inside of the degassing tank 20 reaches a predetermined degree of vacuum to drive or stop the motor 14 for driving the vacuum pop 13 via the controller 6. Wire mesh la and lb have the same circumference 30, outer circumference 31, and groove 28
It has ridges 29 formed by forming, is made of plain weave wire mesh made of brass or stainless steel, and has a wire diameter of 35 or 368.
When a WG material is plain woven, it is desirable to form it with about 40 or 50 meshes, but this varies depending on the width of the grooves 28, which will be described later. Wire mesh 1a.

In 1b, there is an Archimedean spiral @ from the starting point 18.
28 is formed and terminates at the terminal end 17.

The dimensions of the groove 28 are preferably the same as or slightly larger than the outer diameter of the flow pipe 19, and the height of the crest 29 is preferably approximately the same as the height of the flow pipe 19 when the flow pipe 19 is inserted into the groove 28. . In the case of gold N41a, lb having the above-mentioned dimensions, the outer diameter of the channel pipe 19 is 3cm, and the width of the ridge 29 in this case is about 1+o. Furthermore, if the gold tI41a and lb are twisted in the same direction as shown in FIG. 4, it is desirable to provide a spacer 4.
$1 When facing each other as shown in the figure, the spacer 4 can be omitted.

In addition, in the case of the flow path pipes 19 stacked on 2F- as shown in FIG. 1, independent flow paths may be formed as shown in FIG. and the inlet may be connected to form one flow path.

As described above, the deaeration device of this embodiment has good gas permeability and excellent chemical resistance, and has a movable flow path tube in which the liquid to be degassed flows, and an adjacent deaeration tank. Since the space between the outer circumferential tube and the outer tube is maintained at a predetermined interval and the two layers are formed in an almost spiral planar shape, a large amount of air can be removed quickly and smoothly without the outer circumferential tube coming into contact with each other. The length of the branch pipe can be reduced, and the amount of water remaining in the pipe can be reduced.
In addition, the simple structure allows the device to be made smaller.

Since the channel tube is held by a wire mesh to prevent deformation, the tube wall can be made thinner, and air can be removed more efficiently and the length of the channel tube can be shortened.

5 and 6 show other embodiments, and FIG. 5 shows the 21W (
D41M4hZ*f) @*F, fat-;M"JmF)
"F-mG," □Figure 6 is a cross-sectional view of a part of the flow path tube in a friendly state where the disk in FIG. While the above embodiment uses the wire mesh 1 having substantially spiral grooves 28 to maintain the substantially spiral plane shape, this embodiment uses a plurality of bottles protruding from the disk. In the figure, the disk 21 has a donut shape with an outer circle 823 and an inner circumference 24, and has many ventilation holes 25 and ventilation holes 1W26. The bottles 22 are arranged radially at a predetermined interval in a predetermined square.When a channel pipe 19 is inserted between adjacent bottles 22, it becomes possible to wind the bottles in an Archimedean spiral shape. There is.

Then, a spacer 27 shown in FIG. 6 may be placed at an interval -th above the flow path W19. This example also has the same effects as the above example.

〔Effect of the invention〕

As described above, the degassing device of the present invention has the effect of efficiently degassing and making the device compact with a simple structure.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of a degassing tank of an embodiment of the degassing device of the present invention, Figure 2 is a plan view of a wire mesh used as shown in Figure 1, and Figure 3 is similar to Figure 2. A cross-sectional view of a portion of the pipe with the pipe inserted, Figure 4 is! FIG. 5 is a cross-sectional view of a part of the same part as the wire mesh part in FIG. 1, FIG. 5 is a plan view of a disk having the same function as the wire mesh in FIG. 6
The figure is a partial cross-sectional view of the state in which the flow pipe is held by the disc shown in Figure @5. 1, la, It)...Wire mesh, 13...Vacuum pot,
19... Flow pipe, 20... Deaeration pipe, 21...
Disc, 22...pin, 28...groove.

Claims (1)

[Scope of Claims] 1. A flexible channel tube that has good gas permeability and excellent chemical resistance and allows a liquid to be degassed to flow therein, and a flexible channel tube that houses the channel tube and the channel. A degassing tank is formed so that the inside, which is the outside of the tube, is evacuated, and the flow path tube has a substantially spiral planar shape while maintaining a predetermined distance between the adjacent circular outer circumferential tubes. A deaeration device characterized in that the degassing device is formed by retaining at least one layer of. 2. The degassing device according to claim 1, wherein the flow path pipe is held in a groove formed in a substantially spiral shape in a wire mesh. 3. The degassing device according to claim 1, wherein the flow path pipe is fixed in position by a plurality of pins protruding from a disk so as to maintain a substantially spiral shape.