JPS6026879A - Piping joint - 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 The present invention relates to a pipe joint for connecting a pipe material such as a gas chromatograph column to a gas-tight structure.

Fig. 1 is a partially cutaway view showing a conventional example of such a pipe joint, and in the figure, 1 is a 1/16 inte pipe, for example, and a thin tube "a" and b are attached to the tip of the thin tube 1. 1° is a cap nut for connecting a small tube, 2 is a large pipe made of, for example, a 1/8 inch column, 2
a, 2. 2 is a front sleeve attached to the tip of the thick pipe 2, 2 is a cap nut for connecting the thick pipe, 3 is a joint such as a 171.6'"-1/8" joint, 3 .L and 3b are the threaded parts that mesh with 3a and 3b, and 3o is the body of the joint 3. In FIG. 1, the cap nut 1° is screwed onto the threaded portion 3a, and the threaded connection is strengthened by applying, for example, a set screw to the cap nut 1 and the body portion 3 and rotating them Cc. Similarly, after the cap nut 2° and the threaded portion 3b are screwed together, the cap nut 2° and the body portion 3b are rotated to strengthen the screw connection. In this way, the thin tube 1 and the thick tube 2 are connected to a gas-tight structure via the joint 6.

However, in the above conventional example, since the configuration is such that the engagement between the cap nuts 1° and 2o and the threaded portions 3a and 3b is increased using a set screw, etc., the cap nut is 1°.

If the space around the joint 2 or the joint 3 is narrow, it is difficult to increase the feed rate. %K, in process gas chromatographs, the air/spring tubes and columns, which correspond to the above-mentioned thin tubes and large tubes, are often housed in a small thermostat; therefore, as the number of columns increases or the column length increases, This feeling was strong. In the above-mentioned conventional example, the piping joint is composed of the front sleeve 1al 2a+'', the sleeve 1b, 2b2 bag boot 12, and the joint 5, but there are a large number of these components, and these parts are Another disadvantage of pipe joints made of these is that they are expensive.

The present invention has been made in view of these drawbacks, and an object of the present invention is to provide a pipe joint that allows a desired pipe material to be easily connected to a gas-tight structure even in a narrow space.

Hereinafter, the present invention will be explained in detail using figures.
The figure is a cross-sectional view of the configuration of an embodiment of the present invention, and in the figure, the same symbols as in FIG. 1 are used with the same meaning, and redundant explanation will be omitted here. 1d is the sleeve attached to the tip of the thin tube 1, and 2' is the sleeve 1d &2' attached to the tip of the thick tube 2.
A large pipe with an engaging taper; 2. 2 is a sleeve attached to the tip of the thick tube 21; 4 is a first member such as a cassette body for a cassette-type column; and 4 is the sleeve 2. 4b is a screw hole provided near the hole 4a, and 5 is a disconnected L-shaped hole with the sea side end attached to the first member. The second part to be abutted, 5 is a second hole through which the thin tube 1 is passed, 5 is a hole provided near the hole 5a, and 6 is a hole in which a threaded portion 6b is inserted into the screw hole 4b through the hole 5b. It is a screw that is screwed together. In the embodiment of the present invention having such a configuration, when the screw 6 is tightened using a screwdriver, hexagonal wrench, etc., the thin tube is moved by the lever principle using the contact portion of the first member 4 and the second member 5 as a fulcrum. 1 and the thick pipe 2' are connected in a gas-tight structure. That is, when the screw 6 is tightened, the area around the second hole 5 of the diaphragm 2 member 5 is inserted into the sleeve 1. Press
The sleeve 1 bites into the inner side of the tip of the thick tube 2I, and the sleeve 2d bites into the tapered portion of the tip opening of the first hole 4a. Due to the biting of the sleeve, the thin tube 1 and the thick tube 21 are sleeved.

1 to the gas-tight structure.

When the screw 6 is loosened (or released) using a screwdriver, hex wrench, etc., the second hole 5 is opened.
Since the suppression of the sleeve 1d by the surrounding parts is released,
The small tube 1 and the large tube 2'' can be easily removed.

FIG. 3 is a configuration explanatory diagram showing another embodiment of the present invention;
In the figure, the same symbols as those in FIG. 2 are used to convey the same meaning, and redundant explanation will be omitted here. Further, 51 is a member that is slightly thicker than the second member 5, has a cut-off cursor shape, and has one end in contact with the first member; a, and a second hole having a predetermined taper at the tip opening facing the first hole 4 of the first member 4;
7 is a large pipe, such as a 178-inch pipe, with a taper on the outside of the tip that engages with the inner tapered part of the tip of the thick pipe 2; 7 - the tip of the thick pipe 7; This sleeve is attached to a predetermined portion of the second hole 5a+ and engages with the tapered portion of the tip opening of the second hole 5a+. In FIG. 3, when the screw 6 is tightened using a screwdriver, hex wrench, etc., the thick pipe 7 and the two large pipes will be connected to a gas-tight structure. That is, when the screw 6 is tightened, the sleeve 7d bites into the tapered part of the opening at the tip of the second hole 5' of the second member 5', and the outer tapered part of the tip of the thick tube 7 and the inner side of the tip of the thick tube 21. The tapered portions are engaged, and the sleeve 2d comes to bite into the tapered portion of the opening end of the first hole 2d of the first member 4. In this way, thick pipe 7
and the thick pipe 2' are connected to a gas-tight structure. Incidentally, when these large pipes 7 and 21 are to be removed, the screws are loosened and then removed, as in the case of the embodiment shown in FIG.

According to the embodiments and other embodiments of the present invention as detailed above, the thin tube 1 (or thick tube 7) and the thick tube 2 (or thick tube 21) are connected to a gas-tight structure by tightening the screw 6. Since it is configured so that it can be connected easily, it has the advantage of being easy to connect even when the surrounding space is narrow. In particular, in the case of process gas chromatographs, in which many columns corresponding to the above-mentioned thin tubes and large tubes are housed in a small thermostatic chamber, the work of column washing and maintenance is much simpler than in the case of the conventional example. It has the advantage of being standardized. In addition, in the conventional example, the sleeves 1a, 1b, 2a, 2b, bag necks) 1, 2, and joint 3 were required, whereas according to the present invention, the sleeves 1d, 2d (or 7d, Although only 2.) is required, the number of parts has been reduced and has been described in detail, but the same can be said of the column for liquid chromagraph 2.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway view showing a conventional pipe joint, FIG. 2 is a cross-sectional view of the structure of an embodiment of the present invention, and FIG. 3 is an explanatory view of the structure of another embodiment of the present invention. 1...tubule, 2.2', 7...large tube, 1a+ 1b
+ 2a, 2b+1d, 2d, 7d-...Sleeve, 1o, 2o...Bag, To, 3...Joint, 4.
...First member, 5,5°...Second member, 6...Screw, 3a, 3. , 6b--screw part, 4a, 5a,
5b, 7a...hole, 4b...screw hole. Kaya I Figure 1υ 2nd Senkyo 3 Ward

Claims (1)

[Claims] (1) A large tube with a first taper attached to the inner side of the tip is penetrated, and a second taper is attached to the first hole attached to the tip -110 part and near the hole. a first member having a threaded hole provided therein; a second hole through which a thin pipe connected to the large pipe is passed; and a second part having a disconnection cross-shaped hole provided near the hole; a first sleeve attached to the outside of the tip of the thin tube and engaged with the first taper; and a second sleeve attached to the outside of the tip of the large tube and engaged with the second taper. However, when the screws leading through the hole and the screw hole are tightened, the first and second sleeves are pressed to connect the thick tube and the thin tube into a gas-tight structure! ff
A piping joint characterized by e-closing. (2) The pipe joint according to claim 1, wherein the large tube is a column used in a gas chromatograph or a liquid chromatograph, and the thin tube is an empty pipe. (6) A first hole with a first taper attached to the inside of the tip, through which the first tube material is penetrated, and a second taper attached to the tip opening, and a screw hole provided near the nucleus size. a second member having a sixth taper attached to the outside of the distal end thereof and connected to the first pipe member by piping, and a sixth taper that engages with the first taper;
A second portion having a disconnected cursor shape, through which the tube 4 is passed, and having a fourth tapered second hole at the opening opposite to the tip opening, and a hole provided near the hole. a first sleeve attached to the outer side of the tip of the first tube member and engaged with the second taper; and a second sleeve attached to the outer side of the tip of the second tube material and engaged with the fourth taper. A pipe joint, characterized in that when the screw communicating with the hole and the threaded hole is tightened, the first pipe member and the second pipe member are connected in a gas-tight structure. (4) The first pipe material is a column used in a gas chromatograph or liquid chromatograph, and the second pipe material is an empty pipe.
Piping fittings described in section 5).