JP2014185740A - Joint pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint pipe which has a simple structure, and can be securely fitted with a hollow pipe.SOLUTION: A joint pipe 10 includes: a body portion 11; a grip portion 12; a spiral fitting portion 13 formed on a surface of the body portion 11; and a passage 14. The spiral fitting portion 13 is equipped with a protrusion 15 continuously formed in a spiral shape in a longitudinal direction of the spiral fitting portion 13. A hollow pipe 20 is equipped with an outer wall 21, an inner wall 22, and a through-hole 23. By rotating the body portion 11 in a circumferential direction of the passage 14, the spiral fitting portion 13 is fitted with the inner wall 22 while deforming the inner wall 22 of the hollow pipe 20, and the joint pipe 10 and the hollow pipe 20 are securely stuck and fitted with each other.

Description

  The present invention relates to a joint pipe that is used in a substance analysis apparatus and connects a hollow pipe through which a liquid passes and another member.

  Joint tubes may be used to connect the hollow tubes through which the analysis liquid of the substance analyzing apparatus flows or between the constituent units and the hollow tubes (tubes), but the structure is simple and can be firmly fitted. Is desirable. Currently, a tube connector has been proposed in which tubes are connected to each other at high pressure by a male connector portion and a female nut portion (see Patent Document 1).

Special table 2012-519814 gazette

  However, in patent document 1, if both the male connector part and the female nut part are not provided, the connection with the tube is impossible and a problem arises that a large number of members are required.

  This invention is made | formed in view of the said reason, The objective is to provide the joint pipe | tube which has a simple structure and can fit a hollow pipe | tube firmly.

  The joint pipe of the present invention is a joint pipe for connecting at least one hollow pipe through which a liquid used in a substance analysis apparatus passes and another member, and a main body having a passage through which the liquid passes. And a helical fitting portion constituted by a protrusion continuously formed in a spiral shape on the surface of the main body portion, and the helical fitting portion moves the main body portion in the circumferential direction of the passage. By rotating, it is possible to fit the inner wall of the hollow tube while deforming the inner wall.

  As one aspect of the present invention, for example, in the joint pipe, the helical fitting portion has a tapered shape.

  As one aspect of the present invention, for example, in the joint pipe, the height of the protrusion of the helical fitting portion is smaller than the thickness of the wall of the hollow pipe.

  As one aspect of the present invention, for example, the joint pipe has a pair of helical fitting portions formed at both ends in the longitudinal direction of the main body portion.

  As one aspect of the present invention, for example, in the joint pipe, the helical fitting portion is constituted by a male screw portion, and has a female screw portion that is screwed into the male screw portion, and when the male screw portion and the female screw portion are screwed together. A connection auxiliary member that can press the outer wall of the hollow tube is further provided.

  According to the present invention, since the helical fitting portion of the joint pipe is screwed so as to bite into the inner wall of the hollow pipe and the hollow pipe is forcibly deformed, the hollow pipe is elastically pressed against the joint pipe. The adhesion strength is increased, and a strong connection without liquid leakage can be achieved at the fitting portion between the hollow tube and the joint tube. Further, since the main body can be connected to the hollow tube only by rotating in the circumferential direction of the passage, the configuration is simplified. Furthermore, the direction of the rotating force is perpendicular to the direction of the hollow tube, the force required for the connection work is reduced, and workability is improved.

The side view which shows an example of the joint pipe and hollow tube which concern on this invention. The side view which is an example of 1st Embodiment which shows the fitting state of the joint pipe and hollow tube which concern on this invention. The side view which is an example of 2nd Embodiment which shows the fitting state of the joint pipe and hollow tube which concern on this invention. The side view which shows the procedure of fitting in 2nd Embodiment, (a) The state which set the connection auxiliary member, (b) The state which inserted the hollow tube in the connection auxiliary member, (c) A joint pipe and hollow The state where the tube is fitted.

  Hereinafter, a preferred embodiment of the joint pipe according to the present invention will be described in detail with reference to FIGS.

  FIG. 1 is a side view showing an example of a joint pipe and a hollow pipe according to the present invention.

  The joint pipe 10 is used for a substance analyzing apparatus, and is used for connecting a hollow pipe 20 through which a liquid passes and provided in the substance analyzing apparatus and other members (including the hollow pipe 20). The substance analyzer is an inductively coupled plasma emission analyzer (ICP emission analyzer), a liquid chromatograph analyzer, a fluorescent X-ray analyzer, or the like that analyzes various liquids. The joint pipe 10 is made of a chemical-resistant resin or metal, and includes a main body part 11, a gripping part 12 having a substantially hexagonal cross section protruding outside the main body part 11, and a helical fitting formed on the surface of the main body part 11. The joint part 13 and the channel | path 14 which penetrates the inside of the coupling pipe 10 and a liquid flows are provided. Moreover, the helical fitting part 13 is comprised from the processus | protrusion 15 which was provided in the both sides of the holding part 12, and was continuously formed in the helical form along the longitudinal direction (refer arrow in the figure) of the helical fitting part 13. A screw thread such as a bolt is formed, and a male screw portion 16 is provided.

  The hollow tube 20 is made of a chemical-resistant resin, has a predetermined circular cross section and a predetermined length for flowing a liquid to be analyzed by a substance analyzer, and covers the outer wall 21, the inner wall 22, and the inner wall 22. And a through hole 23 serving as a liquid flow path.

  The outer diameter of the helical fitting portion 13 is increased as the helical fitting portion 13 of the joint pipe 10 is separated from the gripping portion 12 with respect to the longitudinal direction so that the helical fitting portion 13 can be easily fitted to the inner wall 22 of the hollow tube 20. It has a tapered shape (tapered shape) that becomes small. That is, the outer diameter D2 at the tip of the main body 11 is smaller than the outer diameter D1 closest to the gripping portion 12 (D1> D2). Further, the outer diameter D2 of the tip is formed larger than the inner diameter D3 of the inner wall 22 of the hollow tube 20 (D2> D3), so that the inner wall 22 swells outwardly and deforms, and the joint tube 10 and the hollow tube 20 The degree of adhesion can be increased. Furthermore, the height (pitch height) H of the protrusions 15 of the helical fitting portion 13 is formed smaller than the wall thickness L of the hollow tube 20 (H <L). Thus, the protrusion 15 can surely bite into the inner wall 22.

  FIG. 2 is a side view which is an example of the first embodiment showing a fitting state between the joint pipe and the hollow pipe according to the present invention.

  The fitting of the joint tube 10 and the hollow tube 20 is performed by holding the grip portion 12 with a hand or a spanner and rotating the main body portion 11. The distal end of the spiral fitting portion 13 is brought into contact with the distal end of the hollow tube 20, and the main body portion 11 is forcibly inserted into the through hole 23 of the hollow tube 20 while rotating in the circumferential direction of the passage 14. The inner diameter D <b> 3 of 22 is expanded, and the protrusion 15 is bitten into the inner wall 22. Further, the rotation of the helical fitting portion 13 is advanced, and the tip of the helical fitting portion 13 is inserted into the through hole 23 and the plurality of protrusions 15 are bitten into the inner wall 22 (self-locking). And the hollow tube 20 are fitted. As a result, the inner diameter D3 of the inner wall 22 of the hollow tube 20 is further expanded and deformed outward, and the inner wall 22 is fitted so as to wrap around the helical fitting portion 13, so that the joint tube 10 and the hollow tube 20 Can be tightly fitted.

  The plurality of projections 15 bite into the inner wall 22 while forcibly expanding and deforming the hollow tube 20, so that the vicinity of the tip of the hollow tube 20 elastically presses the helical fitting portion 13, and the joint tube 10 A fitting connection with excellent waterproofness can be made with the hollow tube 20. Further, since the main body 11 can be connected to the hollow tube 20 only by rotating in the circumferential direction of the passage 14, the configuration is simplified. Furthermore, the direction of the rotating force is perpendicular to the direction of the hollow tube 20, so that the force required for the connection work is reduced and workability is improved. And since the channel | path 14 of the joint pipe 10 and the through-hole 23 of the hollow tube 20 are reliably connected, it does not produce a disorder | damage | failure or stay in the flow of a liquid, and has an influence on the measured value of the apparatus for material analysis. It is possible to provide a fitting fastening that does not reach.

  The pitch of the protrusions 15 of the spiral fitting portion 13 provided on both sides of the grip portion 12 may be the same or different. Further, the outer diameters D1 and D2 of the spiral fitting portion 13 can be changed in accordance with the inner diameter D3 of the hollow tube 20. It has been shown that the spiral fitting part 13 is formed on both sides of the grip part 12, but it may be on one side, and in the case of one side, the other side of the joint pipe 10 is another member of the substance analyzing apparatus. It may be directly connected to the constituent unit or other hollow tube 20 or the like. Moreover, although the holding part 12 was described above as a hexagonal shape, it is not limited to the shape, and may be any shape that can be easily held by a hand, a spanner, or the like. In addition, although the protrusion 15 which comprises the external thread part 16 is provided in the helical fitting part 13, the pitch of the protrusion 15 can be expanded and the helical fitting part 13 can also be made into a drill-shaped thing.

  FIG. 3 is a side view showing an example of the second embodiment showing a fitting state between the joint pipe and the hollow pipe according to the present invention. The difference from the first embodiment is that a connection auxiliary member is used for fitting. The same configurations as those of the first embodiment are denoted by the same reference numerals and detailed description thereof is omitted.

  The connection auxiliary member 30 is made of resin or metal in a substantially cylindrical shape, and includes a female screw portion 31 that is screwed with the male screw portion 16 of the helical fitting portion 13 and an insertion portion 32 that holds the hollow tube 20. The tube 10 is used for easy fitting with the hollow tube 20 and further strengthening the fitting adhesion. The insertion portion 32 includes an insertion port 33 into which the hollow tube 20 is inserted, and a holding portion 34 whose diameter increases from the insertion port 33 toward the female screw portion 31. Further, the holding portion 34 has a shape commensurate with the degree of deformation of the hollow tube 20 in the outward direction, and the outer wall 21 of the hollow tube 20 is engaged with the male screw portion 16 and the female screw portion 31 and is completely fitted. It is always pressed afterward to suppress the outward deformation of the hollow tube 20.

  Next, the work procedure of the connection auxiliary member 30 will be described with reference to FIG.

  FIG. 4 is a side view showing an example of a fitting procedure in the second embodiment, wherein (a) shows a state where a connection auxiliary member is set, and (b) shows a connection of a hollow tube. The state inserted in the auxiliary member is shown, (c) has shown the state which the joint pipe and the hollow pipe were fitted.

  Procedure 1 (see FIG. 1A): The female thread portion 31 of the connection assisting member 30 and the distal end of the male thread portion 16 are screwed together.

  Procedure 2 (see FIG. (B)): The distal end of the hollow tube 20 is inserted from the insertion port 33 of the connection auxiliary member 30, and the hollow tube 20 is moved until the distal end of the hollow tube 20 and the distal end of the joint tube 10 come into contact with each other. Insert into the insertion section 32.

  Procedure 3 (see FIG. 3C): The hollow tube 20 is held by the connection assisting member 30, and the male screw portion 16 is rotated in the circumferential direction of the passage 14. The male screw portion 16 and the female screw portion 31 are screwed and rotated, and the male screw portion 16 forcibly deforms the inner diameter D3 of the inner wall 22 of the hollow tube 20 outward, so that the male screw portion 16 bites into the inner wall 22. Go. At the same time, the outer surface side of the connection auxiliary member 30 corresponding to the female screw portion 31 is also deformed outward. Since the outer wall 21 that is forcibly deformed outward at the same time as the inner wall 22 is in contact with the holding portion 34 and the deformation amount of the outer wall 21 is suppressed, the protrusion 15 and the inner wall 22 are reliably fitted.

  As described above, since the spiral fitting portion 13 is tapered, the outer surface side of the connection auxiliary member 30 is deformed outward. However, the outer diameters D1 and D2 of the spiral fitting portion 13 are the same. Or when the internal diameter of the internal thread part 31 and the external diameter D1 are the same, the outer surface side of the connection auxiliary member 30 of the internal thread part 31 does not deform | transform outward.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimension, numerical value, form, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

  The fitting tube according to the present invention is fitted with a hollow tube for flowing a sample liquid or the like used for analysis in a material analysis device such as an inductively coupled plasma emission analyzer (ICP emission analyzer) or a liquid chromatograph analyzer. It is applicable to the use which performs a combination.

DESCRIPTION OF SYMBOLS 10: Joint pipe | tube 11: Main-body part 12: Holding part 13: Helical fitting part 14: Passage 15: Protrusion 16: Male thread part 20: Hollow pipe 21: Outer wall 22: Inner wall 23: Through-hole 30: Connection auxiliary member 31 : Female thread

Claims (5)

A joint pipe connecting at least one hollow pipe through which a liquid used in the apparatus for material analysis passes and another member;
A main body having a passage through which liquid passes;
A spiral fitting portion composed of a protrusion formed continuously in a spiral on the surface of the main body, and
The helical fitting part is a joint pipe that can be fitted to the inner wall while deforming the inner wall of the hollow pipe by rotating the main body part in the circumferential direction of the passage. The joint pipe according to claim 1,
A joint pipe in which the spiral fitting portion has a tapered shape. The joint pipe according to claim 1 or 2,
The joint pipe, wherein the height of the protrusion of the helical fitting portion is smaller than the thickness of the wall of the hollow pipe. The joint pipe according to any one of claims 1 to 3,
A joint pipe in which a pair of said helical fitting parts are formed in the both ends of the longitudinal direction of the above-mentioned main part. The joint pipe according to any one of claims 1 to 4,
The helical fitting portion is composed of a male screw portion,
A joint pipe having a female screw part that is screwed into the male screw part, and further comprising a connection auxiliary member that can press the outer wall of the hollow pipe when the male screw part and the female screw part are screwed together.

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