JPS60168986A - 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.

Figure #g1 is a partially cutaway diagram showing a conventional example of such a pipe joint. In the figure, 1 is a thin tube made of, for example, a 1716-inch pipe, and la, j, and b are attached to the tip of the thin tube 1. Front sleeve and Pax +) -7', 1c is a cap nut for connecting a capillary tube, 2 is, for example, 178 (
2a, 2b A front sleeve and a back sleeve attached to the tip of the large pipe 2, 2c is a cap nut for connecting the large pipe, 5 is, for example, 1716"-178
``A joint like a joint, 3a and 3b are each bag y)l
3c is the body of the joint 5. In FIG. 1, the cap nut 1c is screwed onto the threaded portion 3a, and a set spanner is applied to the cap nut 1c and the body portion 3c, for example, to rotate them, thereby strengthening the screw connection. Similarly, after the bag neck 2c and the threaded portion 3b are screwed together, the bag neck 2c and body portion 3c are rotated to strengthen the screw connection. In this way, the thin tube 1 and the thick tube 2
is connected to the gas-tight structure via the joint 5.

However, in the conventional example described above, since the structure is such that the screwing of the screw parts 3a and 3b with the screw parts 3a and 3b is increased using a screw spanner, etc.

If the space around 2c or the joint 30 is narrow, there is a drawback that it is difficult to perform additional work. Particularly in single-process gas chromatographs, empty pipes and columns corresponding to the above-mentioned thin and large tubes are often housed in a small thermostatic chamber, so this feeling increases as the number of columns increases and the length of the column increases. It was strong. In addition, in the above conventional example, 70 nt sleeve la, 2a + back sleeve l
A pipe joint is constructed from the pipe joints 1c, 2b, 2b, 1c, 2c+, and the joint 3, but it also has the disadvantage that there are a large number of these components, and the pipe joints made of these parts 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.

A feature of the present invention is that, in a pipe joint, the first member has a screw hole provided near the first hole through which a thick pipe is penetrated and the crest hole, and the second hole through which a thin tube is penetrated and a screw hole provided near the crest hole. a second member having a hollow hole provided in the tube; a sleeve attached to the thin tube; and a sleeve that communicates with the thick tube hole and the nuclear hole into which the tip of the thick tube is inserted, and the tip of the thin tube communicates with the tube hole into which the tip of the thin tube is inserted. A joint body having a thin tube hole inserted through the sleeve is provided, and the thick tube and #l tube are connected by tightening the screw that communicates with the sleeve and the screw hole and pressing the sleeve and the joint body. The reason is that it is connected to a gas-tight structure.

Hereinafter, the present invention will be explained in detail using figures. Second
The figure is a cross-sectional view of the configuration of an embodiment of the present invention. 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 a sleeve attached to the tip of the thin tube 1; 4 is a first member such as a cassette body for a cassette-type column; 4a is a first hole having a tapered opening 4b; 4c 5 is a screw hole provided near the first hole 4a, and 5 is a second hole through which the thin tube 1 is passed.
A second member 6, which has a hole 5a and a hole 5b provided near the pattern hole 5a and has a cross-section with a cross section, for example, has a hole 5b.
a screw 7 through which the threaded portion 6b is screwed into the screw hole 4b;
is an outer circumferential portion on one side ((a thick pipe hole 7d is provided with a second taper 1 that engages with the first taper 4b, and into which the tip of the thick pipe 4a is inserted, and the hole 7d communicates with the communication hole 7c. This joint body also has a thin tube hole 7a into which the tip of the thin tube 1 is inserted through the sleeve 1d. When the screw 6 is tightened, the thin tube 1 and the thick tube 2 are connected to each other in a gas-tight structure by the lever principle using the abutting portions of the first member 4 and the second member 50 as fulcrums. , the portion around the second hole 5a of the second member 5 presses the sleeve 1d.At the same time, the joint body 7
is strongly sandwiched between the first member 4 and the second member 5.

Therefore, the tip of the thin tube 1 is attached to the thin tube hole 7a in a gas-tight structure via the sleeve 1d, and the first taber 4
b and the second taper 7b are strongly pressed and engaged, and the thick pipe 2
The tip end of the tube comes into contact with the large tube hole 7d in a gas-tight structure. Therefore, the thin tube 1 and the thick tube 2 are connected to each other in a gas-tight structure via the sleeve 1d and the joint body 7. Note that when the screw 6 is loosened using a screwdriver, hex wrench, etc., the force pressing the sleeve 1d and the force pinching the joint body 7 are loosened, so that the joint body 7 is loosened.
From this, the thin tube 1 and the thick tube 2 can be easily removed.

FIG. 5 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 with the same symbol as #, and a redundant explanation will be omitted here. Also, 5° is stupid hole 5b
A second member 1d, for example, plate-shaped, has a fourth hole 5a' which is provided at a position substantially symmetrical to the second hole 5a and through which the thin tube 1' is passed; 1d is a sleeve attached to the tip of the thin tube 1; 4a;
" is a third hole provided in the first member 4 so as to be approximately symmetrical to the first hole 4a with respect to the screw hole 4c, and through which the large pipe 2" is passed.
The hole 7° is a pick-up body similar to the joint body 7. In FIG. 3, after passing the capillary tube 1.1 through the second hole 5a and the fourth hole 5a, respectively, the sleeves xa and xa are inserted into the capillary tube 1.
, 1°.

Also, the thick pipes 2 and 2" are etched into the first hole and the fifth hole 4a', respectively.
After passing through the large pipe holes 7d and 7d' of the joint bodies 7 and 7',
Insert the iC ends (those with sleeves ld and ld) respectively. Thereafter, when the screw 6 is passed through the hole 5b and screwed into the screw hole 6b, the first member 4 and the second member 5° approach each other. Therefore, in the same manner as described in detail using FIG. 2, the sleeve ld.

1d and the joint bodies 7, 7, the thin tubes 1, 1 and the thick tubes 2
．． 2° are each connected to a gas-tight structure.

According to the embodiments and other embodiments of the present invention as described in detail above, since the structure is such that the outer peripheral surface of the thick tube 2 (2) is sealed, the core thick tube has a seam portion inside. Even if sealing on the inner circumferential surface is difficult, there is an advantage that the small tube and the large tube can be easily and reliably connected to a gas-tight structure.
) and the thick pipe 2 (or the thick pipe 2) can be connected in a gas-tight structure, so there is an advantage that the connection operation can be easily performed even when the surrounding space is narrow.

In particular, in the case of process gas chromatographs in which many columns corresponding to thin tubes or thick tubes are housed in a small constant temperature chamber, the work of installing and maintaining the columns is significantly greater than in the case of the conventional example. This has the advantage of being simplified. Furthermore, in the conventional example, the l sleeves la, lb, 2a, 2
b + bag nanotoko c, 2c, and joint 3, whereas according to the present invention, mainly the sleeve 1d
Since only the joint body 7 (or 1a', 7') is required, there are advantages in that the number of parts is reduced, manufacturing costs are lowered, and reliability is also improved.

Although the columns for gas chromatographs have been described in detail above, the same can be said for columns for liquid chromatographs.

[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. Id, ld'... Sleeve, IC, 2C... Cap nut, 3... Joint, 4... First member, 5, 5°...
Second member, 6...screw,...communication hole. Leather 1 figure'j A2 figure

Claims (3)

[Claims] (1) A first member having a first hole through which a large pipe is penetrated and a first taper attached to an opening on one side, and a screw hole provided in the vicinity of the hole, and a piping connection with the large pipe. a second member having a second hole through which a capillary tube is passed through and a blind hole provided near the capillary tube; a sleeve attached to the capillary tube; a joint body having a large tube hole which is tapered 2 and into which the tip of the thick tube is inserted, and a thin tube hole which communicates with the large tube hole and into which the tip of the thin tube is inserted through the sleeve; A piping joint, characterized in that when a screw communicating with the blind hole and the threaded hole is tightened, the sleeve and the joint main body are pressed to connect the thick pipe and the thin pipe in a gas-tight structure. (2) The pipe joint according to claim 1, wherein the second member is a member having a cross-sectional shape and having one end abutted against a predetermined portion of the first member. (3) The large tube is a column used in a gas chromatograph or liquid chromatograph 27, and the thin tube is an empty pipe.
) Piping fittings listed in section.