JP5302366B2 - Joining system and joining parts - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joining system for airtightly joining a joined body and a rod like body by inserting the rod like body having a circular cross section into a joining aperture of the joined body, by which the inserted rod like body is prevented from being rotated around a longitudinal axis and high airtightness can be maintained, and a bolt or nut like joining component having a first through hole in an inner longitudinal direction and capable of preventing the rod like body inserted into the first through hole from being rotated around the longitudinal axis. <P>SOLUTION: This joining system has a mechanism for maintaining the airtightness with the usage of a ferrule into which the rod like body is inserted, and preventing the rod like body after joining from being rotated around the axis. The bolt like or nut like joining component having the first through hole in the inner longitudinal direction can prevent the rod like body inserted into the first through hole from being rotated around the longitudinal axis. <P>COPYRIGHT: (C)2013,JPO&amp;INPIT

Description

  The present invention relates to a coupling system and a coupling component. More specifically, the first invention of the present invention is a coupling system that inserts a rod-shaped body having a circular cross section into the coupling opening of the coupled body and hermetically couples the coupled body and the rod-shaped body, The present invention relates to a coupling system having a feature that the inserted rod-shaped body can be prevented from rotating around its longitudinal axis, and thus high airtightness can be maintained. The second invention of the present invention is a bolt-shaped or nut-shaped coupling part having a first through-hole in the internal longitudinal direction, and the rod-shaped body inserted through the first through-hole has a long length. The present invention relates to a coupling component having a feature that it can be prevented from rotating around a vertical axis.

  For example, in various reaction vessels, a rod-like body having a circular cross section such as a pipe for a fluid passage or a thermocouple for measuring temperature in the reaction vessel is inserted into the opening of the reaction vessel, and the vessel is inserted in the insertion portion. It may be necessary to maintain airtightness inside and outside the container. In such a case, a technique using a ferrule is known (see, for example, Patent Document 1 and Non-Patent Document 1).

JP-A-8-304370

Shimadzu GC Co., Ltd. Peripheral parts of GC / GCMS, [online], [Search June 8, 2011], Internet <https: // solutions. shimadzu. co. jp / glc / catalog / pdf / 660-665. pdf>

  However, according to the conventional method, there is a problem that the airtightness is lowered when various processes are performed on the rod-shaped body after the ferrule is used to hermetically close the connection.

  The present inventors examined the cause of the decrease in airtightness. As a result, it is concluded that the rod-shaped body rotates around its longitudinal axis during processing, and the portion hermetically coupled with the rotation slides relatively, thereby reducing the hermeticity. Reached.

  Next, the present inventors have studied a method for preventing a decrease in airtightness and have reached the present invention.

  That is, the problem to be solved by the present invention is to provide a coupling system and a coupling component having the above characteristics.

That is, the first invention of the present invention is a coupling system in which a rod-shaped body having a circular cross section is inserted into the coupling opening of the coupled body to hermetically couple the coupled body and the rod-shaped body. There keeping airtightness of using said inserted through the ferrule, and the rod-shaped body after the coupling have a mechanism to prevent rotation about its axis, furthermore, the following characteristics (a) and (B) Have
(A): A bolt-shaped connecting part sealing part which is arranged in contact with the upper flat surface of the ferrule and has a rod-like body inserted therein and has a male screw groove on the outer surface, or a nut shape having a female screw groove on the inner surface. Having a joint sealing part
(B): The coupling opening of the coupled body can be screwed into the groove of a female screw that can be screwed with the male screw of the coupling part sealing component on its inner surface or with the female screw of the coupling part sealing component on its outer surface. It has a male thread groove and has a tapered surface of the coupling opening that can abut the lower tapered surface of the ferrule corresponding to the lower tapered surface of the ferrule.
Furthermore, the coupling part sealing component is a bolt-shaped or nut-shaped one having a first through hole in the internal vertical direction, and includes a second through hole reaching the first through hole from the outside. And having a female screw groove on the inner surface of the second through hole, inserting a male screw for pressing into the female screw of the second through hole, and pressing the rod-like body at the tip of the male screw for pressing. The present invention relates to a coupling system characterized by preventing rotation of the rod-shaped body .

  The second invention of the present invention is a bolt-shaped or nut-shaped coupling part having a first through-hole in the internal longitudinal direction, and the rod-shaped body inserted through the first through-hole has a long length. The present invention relates to a coupling component having a feature that it can be prevented from rotating around a vertical axis.

  According to the present invention, it is possible to provide a coupling system and a coupling component having the above characteristics.

It is a perspective view which shows the external appearance of the coupling system used in Example 1. FIG. It is sectional drawing of the coupling | bonding system (especially vicinity of the coupling | bond part sealing component and coupling | bonding opening part) used in the comparative example 1. FIG. It is sectional drawing of the coupling | bonding system (When a coupling | bond part sealing component is a bolt shape) used in Example 1 (especially near the coupling | bond part sealing component and the opening part for coupling | bonding. . It is sectional drawing of the coupling | bonding system (especially the vicinity of a coupling | bond part sealing component and the opening part for coupling | bonding. It cut | disconnects by the cut surface of a plane 120 degree | times) in case a coupling | bond part sealing part is nut shape. It is the top view and side surface partial cutaway figure of the coupling | bond part sealing component (in the case of volt | bolt shape) used in Example 1. FIG.

  Hereinafter, embodiments of the present invention will be described in detail. The numbers in () correspond to the numbers in the attached figure.

  Of the present inventions, the first invention is that the rod-shaped body (3) having a circular cross section is inserted into the coupling opening (2) of the body (1) to be coupled (1) and the rod-shaped body (3). A hermetic coupling system that uses the ferrule (4) through which the rod-shaped body (3) is inserted to maintain the hermeticity, and the coupled rod-shaped body (3) rotates about its axis. This is a coupling system having a mechanism for preventing this.

  Examples of the coupled body (1) include various metal reaction vessels. The coupled body (1) is provided with a coupling opening (2), and a rod-shaped body (3) having a circular cross section is inserted through the coupling opening (2). Examples of the rod-shaped body (3) include a pipe (tube) having an inner hole as a fluid passage, a thermocouple in which an element and a lead wire are enclosed, and the like.

  In the present invention, ferrule (4) (sometimes referred to as “ferrule”) is used in order to hermetically bond the coupled body (1) and the rod-shaped body (3). Ferrule (4) is a coupling part that is widely used for such applications. There are various types of ferrules (4). As a typical example, the ferrule (4) has a short cylindrical shape with a through hole inside, and its upper surface is a horizontal smooth plane, and its lower surface is Some have a tapered surface that narrows from the outside of the cylinder toward the through hole.

  In the present invention, a mechanism for preventing the combined rod-like body (3) from rotating about its axis is used. By adopting such a structure, high airtightness can be maintained. Here, “rotation around the axis” means that the rod-shaped body (3) is centered on the axis in the length direction passing through the center of the circular section perpendicular to the length direction of the rod-shaped body (3) having a circular section. To rotate (spin).

  Details of the mechanism for preventing rotation will be described later.

Preferred embodiments of the present invention have the following features (A) and (B).
(A): A bolt-shaped connecting part sealing part which is arranged in contact with the upper flat surface of the ferrule and has a rod-like body inserted therein and has a male screw groove on the outer surface, or a nut shape having a female screw groove on the inner surface. (B): The coupling opening (2) of the joined body (1) is formed of a female screw that can be screwed onto the inner surface of the male thread of the coupling part sealing component (5). A groove of an external thread that can be screwed with the internal thread of the coupling part sealing part (5) is provided on the groove or the outer surface thereof, and the lower tapered surface (6) of the ferrule corresponds to the lower tapered surface (6) of the ferrule. Having a tapered surface (7) of the coupling opening that can abut

  Note that “on the ferrule (4)” means the opposite side of the coupled body (1) side when the rod-shaped body (3) is arranged in the vertical direction.

  As for the taper angle of the lower tapered surface (6) of the ferrule and the angle of the tapered surface (7) of the coupling opening, it is highly airtight that the former angle is sharper by 2 to 10 degrees than the latter angle. Is preferable in that Here, the “angle” is an angle formed between the respective taper surfaces and the central axis of the rod-like body (3) inserted through the ferrule (4).

As a preferred embodiment of the coupling part sealing component (5), it is a bolt-shaped or nut-shaped one having a first through hole (8) in the internal vertical direction, and the first through hole (8 ) Having a second through hole (9) that has a female screw groove on the inner surface of the second through hole (9), and a female screw for pressing ( 10) can be screwed and inserted, and the rod-shaped body (3) can be prevented from rotating by pressing the rod-shaped body (3) from the lateral direction at the tip of the pressing male screw (10).

  The second through-hole (9) is three through-holes (that is, through-holes intersecting each other at an angle of 120 degrees) with the first through-hole (8) as the central axis. Preferably there is. If it arrange | positions to a non-target position, a rod-shaped body (3) cannot be pressed uniformly and airtightness may fall. Moreover, when there are too many 2nd through-holes (9), the process cost of a coupling | bond part sealing part (5) will increase, and it is unpreferable at the point of the effort of an assembly of an apparatus.

  Next, taking a preferred embodiment of the present invention as an example, a method for carrying out the present invention and an operation mechanism of the present invention will be described.

  The rod-shaped body (3) through which the ferrule (4) is inserted is inserted into the coupling opening (2) of the coupled body (1) and lowered. After the lower tapered surface (6) of the ferrule comes into contact with the tapered surface (7) of the coupling opening, the coupling sealing component (5) is inserted and lowered from above the rod-shaped body (3). When the thread groove of the coupling part sealing component (5) and the thread groove of the coupling opening (2) are in contact, the two screws are tightened while being screwed together. As tightening progresses, the upper surface of the ferrule (4) is pressed by the coupling part sealing component (5), and the lower portion of the lower tapered surface (6) of the ferrule is slightly deformed and brought into close contact with the rod-like body (3) side. . Thereby, airtightness is expressed. Up to this point, it is the same as an example of using a ferrule that is widely used.

  Next, the pressing male screw (10) is inserted into the second through hole (9) of the coupling part sealing component (5), and is engaged with the female screw on the inner surface of the second through hole (9) to advance, The rod-like body (3) is pressed from the lateral direction at the tip of the pressing male screw (10). This pressing force can prevent the rod-shaped body (3) from rotating.

  Next, this invention is demonstrated using an Example. The dimensions are approximate values.

Comparative Example 1
FIG. 2 shows a coupling system (conventional example) used in Comparative Example 1.
A rod-like body (3) (fluid passage pipe, outer diameter 1.7 mm) into which a ferrule (4) (a diameter of an internal through-hole is 1.7 mm, length 4 mm) is inserted is connected to a joined body (1) (reaction The container was inserted into the coupling opening (2) (open tip inner diameter: 10 mm) and lowered. After the lower tapered surface (6) of the ferrule (taper angle of 14 degrees) abuts the tapered surface (7) of the coupling opening (taper angle of 20 degrees), the coupling portion sealing component (5) is attached to the rod-shaped body. (3) Inserted from above and lowered. When the thread groove of the coupling part sealing part (5) and the thread groove of the coupling opening (2) are in contact with each other, the coupled body (1) and the rod-shaped body (3) are tightened by screwing both screws together. Combined tightly. In addition, as a coupling | bond part sealing component (5), the thing of the hexagon bolt shape which has the groove | channel of an external thread on the outer surface (The head of a bolt is a regular hexagon with a side length of 13 mm, the external diameter of an external thread part of 10 mm, an external thread part. 15 mm in length, the inner diameter of the first through hole (8) is 1.7 mm, and the second through hole is not provided). The coupling opening (2) of the coupled body has a female thread groove that can be screwed with the male thread of the coupling sealing part (5) on the inner surface thereof, and the lower tapered surface (6) of the ferrule. Corresponding to the lower taper surface (6) of the ferrule (6 mm inner diameter of the female screw portion and 7 mm length of the female screw portion). All materials were stainless steel.

  After the rod-like body (3) is tightly coupled to the coupled body (1) by the ferrule (4), the compressed air is passed through the pipe that is the rod-shaped body (3) to the reaction container (content volume). 3cc), the upper end of the pipe (the opposite side of the coupled body (1)) was closed, and the system consisting of the rod-shaped body (3) and the coupled body (1) was sealed. When the internal pressure of the bonded body (1) was measured with a pressure gauge (not shown) provided for measuring the pressure inside the bonded body (1), it was 4.0 MPa.

  Next, an operation for connecting another pipe to the rod-shaped body (3) was performed near the upper end of the rod-shaped body (3). That is, the rod-like body (3) and another pipe were joined by a normal joining part using the ferrule (4). The rod-shaped body (3) was rotated (rotated) around its axis when the connecting part was screwed. At this time, the internal pressure of the bonded body (1) decreased to 3.0 MPa and further decreased. Moreover, when a soap solution was applied to the portion where the rod-shaped body (3) was inserted into the coupling portion sealing component (5) and a leak test was performed, bubbles were generated and the rod-shaped body (3) and the coupled body (1) ) Was found to be broken.

Example 1 (See FIGS. 1, 3, 4, and 5.)
As the coupling part sealing component (5), there are provided three second through holes (9) (M1.6, depth 5 mm, first through hole (8) arranged at the target position with the central axis as the center axis. This was carried out in the same manner as in Comparative Example 1 except that the one having the above was used. That is, the to-be-coupled body (1) and the rod-shaped body (3) were hermetically coupled by tightening the screws of the coupling portion sealing component (5) and the coupling opening (2) while being screwed together. Subsequently, a male screw for pressing (10) (M1.6, set screw having a length of 4 mm) is screwed and inserted into the female screw of the second through hole (9) (three) of the joint sealing part (5). The rod-shaped body (3) was prevented from rotating by pressing the rod-shaped body (3) with the tip of the pressing male screw (10). Thereafter, as in Comparative Example 1, the rod-shaped body (3) and another pipe were joined. At this time, unlike Comparative Example 1, no rotation of the rod-shaped body (3) occurred, and no decrease in the internal pressure of the coupled body (1) was observed. During the observation time (2 hours), the initial pressure (4 0.0 MPa) was maintained, and no foam was observed in the leak test using the soap solution in the portion where the rod-like body (3) was inserted into the joint sealing part (5).

  The present invention relates to a coupling system in which a rod-shaped body having a circular cross section is inserted into a coupling opening of a coupled body and the coupled body and the rod-shaped body are hermetically coupled, and the inserted rod-shaped body has a length direction. A coupling system having the feature of being able to prevent rotation about the axis of the shaft, and thus maintaining high airtightness, and a bolt-like or nut-like shape having a first through hole in the internal longitudinal direction The rod-shaped body inserted into the first through hole can be prevented from rotating around its longitudinal axis. it can.

DESCRIPTION OF SYMBOLS 1 To-be-joined body 2 Opening part 3 of a to-be-joined body Rod-like body 4 Ferrule 5 Joining part sealing part 6 Lower taper surface 7 of a ferrule Tapered surface 8 of a joining opening part 10 Male screw for pressing

Claims (1)

A coupling system in which a rod-shaped body having a circular cross section is inserted into the coupling opening of the coupled body to airtightly couple the coupled body and the rod-shaped body, and the above-described airtightness is achieved using a ferrule through which the rod-shaped body is inserted. Holding and preventing the combined rod-like body from rotating around its axis, and further comprising the following features (A) and (B):
(A): A bolt-shaped connecting part sealing part which is arranged in contact with the upper flat surface of the ferrule and has a rod-like body inserted therein and has a male screw groove on the outer surface, or a nut shape having a female screw groove on the inner surface. (B): The coupling opening of the joined body has a female screw groove that can be screwed with the male screw of the coupling part sealing component on its inner surface or the coupling portion seal on its outer surface. A male screw groove that can be screwed into the female screw of the fastening part, and a tapered surface of a coupling opening that can abut against the lower tapered surface of the ferrule corresponding to the lower tapered surface of the ferrule; The sealing component is a bolt-shaped or nut-shaped one having a first through-hole in the internal longitudinal direction, and includes a second through-hole that reaches the first through-hole from the outside, and the second Having a female thread groove on the inner surface of the through hole of the Coupling system, characterized in that to prevent rotation of the rod-like body by the pressing male screw into the female screw of the through hole is screwed insert, to press the rod-like body at the distal end of the pressing pressure external thread.

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