JP4438252B2 - Hose fitting flange jig - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a flange jig for a hose fitting, and more specifically, a hose used for a hose fitting flange jig used for a high pressure test of a hose used for a construction machine or the like, or a hose used for a construction machine or the like. The present invention relates to a metal fitting flange jig.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as shown in FIG. 2, for example, a flange jig used for a high-pressure test of a hose is a hollow cylindrical hose fitting 3 attached to a hose 1 via a socket 2 and a high-pressure fluid supply source (not shown). The end surface of the hollow cylindrical adapter 4 to be connected is brought into contact, and an O-ring 6 is interposed as a sealing material on one of the contact end surfaces 5a, 5b between the hose metal fitting 3 and the adapter 4, and the hose metal fitting 3 The split-type flange 7a and the flange base 7b of the adapter 4 were tightly sealed with a plurality of fastening bolts 8, and the high-pressure test of the hose 1 was performed.
[0003]
[Problems to be solved by the invention]
However, when a relatively inexpensive NBR is used as the material for the O-ring 6 as a sealing material, it is not suitable for high-temperature / high-pressure tests. Therefore, fluorine is used, but fluorine is expensive. However, there was a problem that it could not be used repeatedly and also led to the generation of garbage.
[0004]
An object of the present invention is to provide a flange jig for a hose fitting that can be sealed without using an O-ring, that can be repeatedly tested, is low in test cost, and can prevent generation of dust. It is to provide.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention abuts the end surfaces of a hollow cylindrical hose fitting attached to a hose and a hollow cylindrical adapter connected to a high-pressure fluid supply source, and a flange of the hose fitting and the adapter flange stand, in the flange fixture hose fittings for clamping by a fastening bolt of a plurality of which is disposed in the circumferential direction, on one of the abutting end face of the hose fitting and adapter, toward the inside center to form a tapered counterbore surface to form a protrusion having a tapered inclined surface for mating with said tapered counterbore surface to the other, the tapered countersunk surface and a tapered inclined faces, and sets the 25 ° to 35 °, the height of the protrusions is set to 3 mm to 10 mm, and said tapered counterbore surface when clamped by fastening bolts and tapered inclined surface The contact portion is for the subject matter that has been so sealed with a metal seal.
Here, the flange jig of the hose fitting is used for a hose fitting used for a high-pressure test of a hose used for a construction machine or a hose fitting used for a construction machine.
[0006]
In this invention, the tapered counterbore surface and the tapered inclined surface are set to 25 ° to 35 °, and the height of the projection is set to 3 mm to 10 mm, so that the contact end surface is stabilized, The problem of fluid leakage such as oil and damage to the contact end face can be improved .
[0007]
Since the present invention is configured as described above and can be sealed with a metal seal without using an O-ring as in the prior art, repeated testing is possible, test costs are low, and dust generation is prevented. It can be done.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings.
[0009]
Note that the same components as those in the conventional example are denoted by the same reference numerals and description thereof is omitted.
[0010]
FIG. 1 is a cross-sectional view of the flange jig according to the present invention assembled therein, 1 is a test hose, 3 is a hollow cylindrical hose fitting attached via a socket 2, and 4 Are hollow cylindrical adapters connected to a high-pressure fluid supply source (not shown), and 5a and 5b denote contact end surfaces of the hose fitting 3 and the adapter 4, respectively.
[0011]
Reference numeral 7a denotes a split flange of the hose fitting 3, 7b denotes a flange base of the adapter 4, and 8 denotes a plurality of fastening bolts for fastening and fixing the flange 7a and the flange base 7b.
[0012]
In this embodiment, as shown in FIG. 1, a tapered counterbore surface 9 is formed on the contact end surface 5a of the hollow cylindrical hose fitting 3 toward the inner center, and the contact end surface 5b of the adapter 4 is formed. A protrusion 11 having a tapered inclined surface 10 fitted to the counterbore surface 9 is integrally formed. Reference numeral 12 denotes a fluid flow path.
[0013]
The angle of inclination of the tapered counterbore surface 9 and the inclined surface 10 of the protrusion 11 is set to 25 ° to 35 °, preferably 29.5 ° to 30.5 °. The thickness is set to 3 mm to 10 mm, preferably 4 mm to 6 mm.
[0014]
The contact end surfaces 5a and 5b are not stable unless the inclination angle and the height of the projection 11 are within the above-described range, and fluid leakage such as oil and damage to the contact end surfaces 5a and 5b occur.
[0015]
It is also possible to form the tapered counterbore surface 9 on the adapter 4 and the tapered inclined surface 10 on the hose fitting 3.
[0016]
As described above, the hollow cylindrical hose fitting 3 configured as described above and attached to the hose 1 and the hollow cylindrical adapter 4 connected to the high-pressure fluid supply source are brought into contact with each other, The inclined face 10 of the protrusion 11 of the adapter 4 is fitted to the tapered counterbore surface 9 formed on the hose fitting 3, and the flange portion 7a of the hose fitting 3 and the flange base 7a of the adapter 4 are arranged in the circumferential direction. Since the plurality of fastening bolts 8 are fastened and fixed, the O-ring is not used as in the prior art, and the tapered counterbore surface 9 and the inclined surface 10 of the protrusion 11 can be sealed with a metal seal. I can do it.
[0017]
As a result, repeated tests are possible, the test cost is low, and the generation of dust can be prevented.
[0018]
【The invention's effect】
According to the present invention, as described above, a tapered counterbore surface is formed on one of the contact end surfaces of the hose fitting and the adapter toward the inner center, and the other is fitted with the tapered counterbore surface. A protrusion having a tapered inclined surface is formed, the tapered counterbore surface and the tapered inclined surface are set to 25 ° to 35 °, and the height of the protruding portion is 3 mm to 10 mm. Since the metal seal is used for sealing with the contact portion between the tapered counterbore surface and the tapered inclined surface when tightened with the fastening bolt, the conventional O-ring is not used. In addition to being able to perform metal sealing, it is possible to perform repeated tests, and the test cost is low, and the generation of dust can be prevented.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a state in which a flange jig embodying the present invention is assembled.
FIG. 2 is a cross-sectional view of a state in which a conventional flange jig is assembled.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Test hose 2 Socket 3 Hose metal fitting 4 Adapter 5a, 5b Contact end surface 6 O-ring 7a Hose metal split type flange 7b Adapter flange base 8 Fastening bolt 9 Tapered counterbore surface 10 Tapered inclined surface 11 Protrusion 12 Fluid flow path

Claims (2)

The end surfaces of the hollow cylindrical hose fitting attached to the hose and the hollow cylindrical adapter connected to the fluid supply source are brought into contact with each other, and the flange of the hose fitting and the flange base of the adapter are arranged in the circumferential direction. In the flange jig of the hose fitting that is fastened and fixed by a plurality of fastening bolts installed ,
On one of the abutting end face of the hose fitting and adapter, to form a tapered counterbore surface toward the internal center, provided with a tapered inclined face for mating with said tapered counterbore surface to the other And the tapered counterbore surface and the tapered inclined surface are set to 25 ° to 35 °, and the height of the protruding portion is set to 3 mm to 10 mm. A flange jig for a hose fitting that is sealed with a metal seal at a contact portion between the tapered counterbore surface and the tapered inclined surface when tightened and fixed by means of. The flange jig of the hose fitting is used for high pressure testing of hoses used in construction machinery. The hose fitting flange jig according to claim 1, which is used for a hose fitting used in an experiment or a hose fitting used in a construction machine.

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