JPS60208686A - Connecting mechanism of flow path - 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 (a) Industrial Application Field The present invention relates to a flow path connection mechanism used in, for example, a liquid chromatograph or a gas chromatograph.

(b) Prior art In conventional liquid chromatographs and gas chromatographs, a feed pipe is used to flow a mobile phase liquid mixed with a sample into a column, and a feed pipe is used to guide the sample that has passed through the stationary phase packing material in the column to a detector. In order to connect each pipe to a column, a connector is required to fasten and fix the liquid sending pipe and the column end. For example, in a liquid chromatograph, as shown in FIG. Insert the ring (5) and secure the column (1) with the two clamps (6).
) is connected to the feed pipe (2). Same figure (b)
The ball joint 4 is used instead of the clamp (6) in (a).
) is cut into the outside of the groove G to secure it in place with a square-shaped iron piece (7). FIG. 6(c) shows the connecting portion of the gas chromatograph, and the column (1) and the feed pipe (2) are connected by tightening cap nuts 0σ to the bent members +81 to +91.

In this chromatograph, various types of connectors are required to connect the column and the feed pipe, but the operation of tightening clamps and cap nuts is performed when installing the column in the column constant temperature bath. This must be done in a small space such as a thermostatic chamber, and when columns need to be replaced frequently, the replacement operation becomes inconvenient and reduces work efficiency.

(c) Purpose The present invention aims to provide a connecting mechanism for flow channels that eliminates the above-mentioned inconvenience in connection operations and allows easier connection operations.

B) Structure This invention provides a flow path connection mechanism that connects a fluid feeding side flow path and a fluid receiving side flow path via a fastening metal fitting, the fastening metal fitting being made of a shape memory alloy,
The present invention is characterized in that the fastening fittings tighten both flow paths depending on the ambient temperature.

(E) Embodiment A flow path connection mechanism which is an embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a sectional view showing a state in which a column (11) and a feed pipe (2) are connected by a flow path connection mechanism according to an embodiment of the present invention. On the other hand, this column (1) is inserted into the cylindrical chamber inside the junction pipe Q2.

The column (1) is equipped with a fastening tool (131) formed using a shape memory alloy, and the column (1) is connected to a joint pipe az
When inserted into the joint, an inner hole is formed that encloses the thread formed on the outer periphery of the jointed bone with a gap, and as described later, when transformed into a shape memory alloy, the joint A thread is formed that tightly engages the thread on the outer periphery of the tube.

U is a porous metal filter attached to the column (1), and 041 is a banking. This fastening tool (131) transforms as shown in Fig. 3 depending on the set temperature of the column constant temperature bath, deforms in the direction of tightly fitting the column (1) and the joint pipe α2, and feeds the column (1). The connection with the pipe (2) is ensured. Fig. 3 is a diagram showing the state of transformation when the fastening tool (131) is viewed from above.
For 3+, when changing the set temperature of the column constant temperature bath, select and use one that transforms according to each set temperature. As a shape memory alloy, at a temperature between 30 and 100°C,
Au-Cd or Ti-Ni alloy may be used.

The flow path connection mechanism according to the present invention is configured as described above, and when installing the column (1) into a column constant temperature bath, it is inserted into the joint pipe on the feed pipe (2) side, and the fastening tool 1131 is inserted into the joint pipe on the feed pipe (2) side. It is only necessary to attach it to the outer circumference of the joint pipe α2, and no special operation is required for fastening.When the column constant temperature bath reaches the set temperature, the fastener will transform naturally and the connection between the two will be completed.

As for the connection mechanism of the flow path, it is sufficient to form a fastening part made of a shape memory alloy to finally firmly connect the feed pipe and the column, and its form is not limited to the above embodiment.

(to) Effect Since this invention is constructed as described above.

For example, a flow path connection mechanism that simplifies the operation of connection using a connection tool, which is required when installing a column in a column constant temperature bath, and allows reliable column installation. It is possible to provide

[Brief explanation of the drawing]

FIGS. 1(a) and 1(b) are cross-sectional views showing a column connecting portion in a conventional liquid chromatograph, and FIG. 1(C) is a cross-sectional view similarly showing a connecting portion in a gas chromatograph. FIG. 2 is a sectional view showing a state in which a liquid sending pipe and a column are connected through a flow path connection mechanism according to an embodiment of the present invention. FIG. 3 is a perspective view showing the transformation of a fastener made of a shape memory alloy. (1)...Column (2)...Feeding pipe 0z
...Joint pipe 1131...Tightening tool (shape memory alloy)
Figure 1 f, (Figure 2 Figure 3 Procedural Amendment Form 1 Display of Case 1982 Patent Application No. 064094 2 Title of Invention Flow Channel Connection Mechanism 3 Person Making Amendment Relationship with Case Patent Applicant Residence Address: 37 Roots Funiricho, Kawaramachi-dori Nijo-shita, Nakagyo-ku, Kyoto City
Address 8 Name (199) Shimadzu Corporation Representative President Setsuo Yokochi 4 Agent 5 Date of amendment order June 26, 1980 (shipment date)
1st (Q) (b2 ~2 shij3 CC)

Claims (1)

[Scope of Claim] A connection mechanism that connects a fluid sending-side flow path and a fluid receiving-side flow path via a fastening fitting. A flow path connection mechanism characterized in that the fastening metal fittings are made of a shape memory alloy, and the fastening metal fittings tighten both flow paths depending on the ambient temperature.