JP6637533B2 - Pressure-resistant hose with joint - Google Patents

Description

  The present invention relates to a pressure-resistant hose with a joint, and more particularly, to a pressure-resistant hose with a joint suitable as a passage for supplying high-pressure oil from two facilities, for example, for lubrication and cooling of a sliding part of one facility. is there.

  A pressure-resistant hose with a joint is used as a passage for supplying high-pressure oil from two facilities including equipment such as an oil tank and a high-pressure oil pump for lubrication and cooling of, for example, a sliding portion of one facility.

FIG. 3 shows a conventional example of the pressure-resistant hose with a joint. In this figure, a pressure-resistant hose 1 with a joint includes a pressure-resistant hose 2 and metal pipe joints 3 connected to both ends of the pressure-resistant hose 2, and the pressure-resistant hose 2 is composed of an insulating resin tube 2A and a resin tube 2A. And a metal wire braid 2B woven in a tubular shape with a metal wire that covers and reinforces the metal pipe joint. The metal pipe joint 3 is connected to one end (left end) of the pressure-resistant hose 2 by a first joint 30A. And a second joint 30 </ b> B coupled to the other end (right end) of the pressure-resistant hose 2.

  Each of the joints 30A and 30B has an outward joint 31 that can be attached to and detached from a pipe joint (not shown) on the partner equipment side, and an inwardly extending tubular part 32 that can be connected to the pressure-resistant hose 2. A metal sleeve 33 is assembled around the metal sleeve 32, and an annular groove 34 is formed between the metal sleeve 33 and the cylindrical portion 32 and opens inward (to the right in 30A, to the left in 30B).

  By inserting one end of the pressure-resistant hose 2 into the annular groove 34 on the first joint 30A side, the tubular portion 32 is fitted into one end of the tube 2A, and the other end of the pressure-resistant hose 2 is connected to the annular groove on the second joint 30A side. By inserting into the tube 34, the tubular portion 32 is fitted into the other end of the tube 2A. Here, by crimping each of the metal sleeves 33, the pressure-resistant hose with a joint 1 having the metal pipe joints 3 at both ends of the pressure-resistant hose 2 is assembled.

  However, in the conventional pressure-resistant hose 1 with a joint, since each of the joints 30A and 30B is electrically short-circuited via the conductive metal wire blade 2B, one of the pressure-resistant hoses 1 with the joint is connected. If there is a potential difference between the facility and the two facilities, electricity flows from one joint to the other joint, causing various harmful effects and causing a problem of lack of safety.

nothing special

  The present invention has been made in view of the above-mentioned circumstances, and has a joint having a high pressure resistance required for permitting the flow of a high-pressure fluid (for example, high-pressure oil), while avoiding a short circuit and improving safety. It is intended to provide a pressure-resistant hose.

In order to achieve the above object, a pressure-resistant hose with a joint according to the present invention,
A pressure-resistant hose with a joint formed by joining metal pipe joints to both ends of the pressure-resistant hose,
The pressure-resistant hose includes a resin tube and a metal wire blade covering the tube.
The metal pipe joint includes a first joint and a second joint that are separately coupled to one end and the other end of the pressure-resistant hose,
Each joint has an outward joint portion detachable from the pipe joint on the partner facility side, and an inward cylinder portion connectable to the pressure-resistant hose, and surrounds each cylinder portion separately and is assembled to the cylinder portion. A metal sleeve forming an inwardly opened annular groove between the assembled cylindrical portion,
Insulation caps each having an L-shaped cross section are attached to the outer circumference of both ends of the pressure-resistant hose from both end sides. Sides are fitted around the outer periphery near both end faces of the pressure-resistant hose via the insulating layer,
Both ends of the pressure-resistant hose are individually inserted into each annular groove with each insulating cap and each insulating layer, and both ends of the metal wire blade are connected to each other by a resin tube, each insulating cap and each insulating layer. Each metal sleeve is insulated, and each metal sleeve is caulked, and each joint is separately fixed to both ends of the pressure-resistant hose ,
The metal wire blade comprises a double or higher-strength steel wire blade, and is provided with a metal end tube fitted to both ends of the metal wire blade .

According to the pressure-resistant hose with the joint having the above-described configuration, the resin tube ensures liquid leakage prevention, and the pressure-resistant strength of the metal wire blade , which is increased in correspondence with the number of stacked high-strength steel wire blades , allows the passage of high-pressure fluid for a long time. Not only can it be compensated over a wide range, but also the essential properties required for a joint-resistant pressure hose, such as easy-to-use flexible properties obtained by the combined action of the resin tube and the metal wire blade, can be effectively exerted.
On the other hand, both ends of the metal wire blade are insulated from the joints and the metal sleeves by the resin tube, the insulating caps and the insulating layers, thereby avoiding a short circuit between the joints and improving safety. It becomes possible.

  When the metal wire blade is cut alone, the vicinity of the cut surface is expanded and deformed.However, if the metal end blade is fitted to the metal wire blade and cut in advance, the substantially sucker-shaped expanded deformation is avoided. You. Therefore, the insulating cap can be easily attached and inserted into each annular groove, and the assemblability of the pressure-resistant hose with a joint is improved. In addition, since the metal end tube prevents contact between the metal wire blade having a rough surface and the insulating layer, it can contribute to preventing the insulating layer from being broken, and the insulating layer has a metal end tube having no uneven surface. The coating suppresses tearing.

The pressure-resistant hose is covered with an insulating outer blade, and both end portions of the outer blade cover the respective insulating layers and are inserted into the respective annular grooves. According to this, the caulking of each metal sleeve does not directly act on each insulating layer, and it becomes possible to suppress the tearing of each insulating layer due to caulking. In addition, the exterior blade protects the metal wire blade, so that damage to the metal wire blade due to interference with surrounding structures and equipment can be prevented.

  ADVANTAGE OF THE INVENTION The pressure-resistant hose with a joint of this invention ensures the liquid leakage prevention effect, is capable of increasing the pressure-resistant strength, compensating the passage of the high-pressure fluid for a long period of time, and obtaining easy-to-use bending property. In addition to effectively exhibiting the essential characteristics of a pressure-resistant hose with a joint, etc., both ends of the metal wire braid are insulated from each joint and each metal sleeve. Can be increased.

BRIEF DESCRIPTION OF THE DRAWINGS It is the half cut-away sectional view which partially omitted the intermediate part which shows one Embodiment of the pressure-resistant hose with a joint which concerns on Claim 1 of this invention. It is the half section sectional view which omitted a part of the middle part which shows one embodiment of the pressure-resistant hose with a joint concerning Claim 2 of the present invention. It is a half-section sectional view of a conventional example.

Hereinafter, a preferred embodiment of a pressure-resistant hose with a joint according to the present invention will be described with reference to the drawings. FIG. 1 is a half cross-sectional view of an embodiment of a pressure-resistant hose with a joint according to claim 1 of the present invention, in which an intermediate portion is partially omitted.
Incidentally, in the conventional example, the same parts in FIG. 3, are denoted by the same reference numerals.

As shown in FIG. 1, a pressure-resistant hose 1 with a joint according to claim 1 of the present invention includes a pressure-resistant hose 2 and metal pipe joints 3 connected to both ends of the pressure-resistant hose 2. An insulating resin tube 2A made of tetrafluoroethylene resin and a metal wire blade 2B covering the resin tube 2A are provided, and the metal wire blade 2B of the present embodiment is woven into a tubular shape with a high-tensile stainless steel wire. High-strength stainless steel wire braids, and metal end tubes 6 made of stainless steel end tubes are externally fitted to both ends of the metal wire blade 2B. It is covered with. This insulating layer 4 is formed by winding a tetrafluoroethylene resin tape. The metal pipe joint 3 includes a first joint 30A made of stainless steel connected to one end (left end) of the pressure-resistant hose 2 and a second joint made of stainless steel connected to the other end (right end) of the pressure-resistant hose 2. 30B.

  Each of the joints 30A, 30B is detachable to a pipe joint (not shown) on the partner equipment side. The joints 31 are outwardly facing (leftward for the first joint 30A, rightward for the second joint 30B), and an inner part that can be connected to the pressure-resistant hose 2. A cylindrical portion 32 extending in the direction (rightward in the first joint 30A, leftward in the second joint 30B), and the cylindrical portion 32 is opposite to the large-diameter portion 32b extending toward the joint portion 31 with the step surface 32a as a boundary. The large diameter portion 32b is provided with a male screw 32d on the outer periphery near the step surface 32a of the large diameter portion 32b.

  A metal sleeve 33 is attached to each of the joints 30A and 30B so as to surround the respective tubular portions 32. The metal sleeve 33 of the present embodiment is made of a stainless steel sleeve. By attaching the metal sleeve 33 to the tubular portion 32, an annular groove 34 that opens inward (to the right in the first joint 30A and to the left in the second joint 30B) is formed between the metallic sleeve 33 and the tubular portion 32. . Assembling of the metal sleeve 33 to the cylindrical portion 32 of the first joint 30A is performed by screwing a female screw 33b provided on the inner periphery of the assembly side end 33a of one of the metal sleeves 33 to a male screw 32d of the cylindrical portion 32. The attachment of the metal sleeve 33 to the tubular portion 32 of the second joint 30B is performed by screwing a female screw 33b provided on the inner periphery of the attachment side end 33a of the other metal sleeve 33 to the male screw 32d of the tubular portion 32. This is done by:

The outer periphery of both ends of the pressure-resistant hose 2, that is, the outer periphery in the vicinity of the outer end face of each metal end tube 6, is provided with an insulating cap 5 made of an L-shaped annular body having a cross section molded from an insulating tetrafluoroethylene resin. It is adhered from both ends (left end and right end), closes both end surfaces of the metal wire blade 2B with the inner surface of one side 5a of each insulating cap 5, and the other side 5b of each insulating cap 5 is It is fitted fixed via the outer end face portion near the outer periphery of the outer edge surface vicinity of each end metal tube 6.

With the operation of separately fitting the tubular portions 32 of the first and second joints 30A and 30B to both ends of the resin tube 2A, both ends of the pressure-resistant hose 2 are connected to the insulating caps 5, the insulating layers 4 and the metal end tubes. 6 is inserted separately into each annular groove 34, and one side 5 a of each insulating cap 5 comes into contact with the step surface 32 a of the cylindrical portion 32. Thereby, both ends of the metal wire blade 2B are insulated from the cylindrical portion 32 by the resin tube 2A and one side 5a of each insulating cap 5, and the other side 5b and each insulating layer 4 of each insulating cap 5 are provided. Thereby, it is insulated from each metal sleeve 33. Here, when the metal sleeves 33 are caulked, the pressure-resistant hose 1 with joints in which the first and second joints 30A and 30B are fixed to both ends of the pressure-resistant hose 2 is formed.

According to the pressure-resistant hose with a joint 1 having the above-described structure, the resin tube 2A ensures the prevention of liquid leakage , and the pressure-resistant strength of the metal wire blade 2B , which is increased corresponding to the number of superposed high-strength steel wire blades, allows passage of high-pressure fluid. Not only can be compensated over a long period of time, but also the indispensable characteristics of the pressure-resistant hose 1 with a joint, such as easy-to-use flexibility due to the combined action of the resin tube 2A and the metal wire blade 2B, can be effectively used. Can demonstrate.

On the other hand, both ends of the metal wire blade 2B are insulated from the cylindrical portion 32 of the first and second joints 30A and 30B by the resin tube 2A and the respective insulating caps 5 and assembled to the respective joints 30A and 30B. the metal sleeve 33 are, because it is insulated by the insulating layer 4 and the insulating cap 5, the joint 30A, while avoiding a short circuit and what 30B, it is possible to improve the safety of the joint with pressure hose 1 .

  When the metal wire blade 2B made of a double high-strength stainless steel wire blade is cut alone, the vicinity of the cut surface is expanded and deformed, so that the insulating cap 5 cannot be attached and inserted into each annular groove 34. However, if the metal end tube 6 is externally fitted to the metal wire blade 2B and cut in advance, the expanding deformation is avoided. Therefore, the insulating cap 5 can be easily attached and inserted into each of the annular grooves 34, and the assemblability of the joint-resistant pressure hose 1 is improved. Further, since the metal end tube 6 prevents the metal wire blade 2B having a rough surface from being in contact with the insulating layer 4, it can contribute to preventing the insulating layer 4 from being broken, and the insulating layer 4 has an uneven surface. By covering the non-metallic end tube 6, the breakage is suppressed.

Next, a pressure-resistant hose with a joint 1 according to a second aspect of the present invention will be described.
Figure 2 is a half-cut cross-sectional view of an intermediate portion omitted partially showing an embodiment of a fitting with pressure hose according to claim 2 of the present invention.
The same parts as those of the pressure-resistant hose with a joint in FIG. 1 are denoted by the same reference numerals, and the description of the overlapping structure and operation will be omitted.

As shown in FIG. 2 , the pressure-resistant hose 2 is covered with an insulating outer blade 7, and both ends of the outer blade 7 are expanded in diameter and cover the respective insulating layers 4 and inserted into the respective annular grooves 34. . The exterior blade 7 of the present embodiment is made of a glass fiber blade having an insulating property. By using a glass fiber blade, it becomes strong against external heat.

  With such a configuration, the caulking of each metal sleeve 33 does not directly act on each insulating layer 4, and it is possible to suppress the tearing of each insulating layer 4 due to caulking. In addition, the exterior blade 7 protects the metal wire blade 2B, and can prevent damage to the metal wire blade 2B due to interference with surrounding structures and devices.

  Although the pressure-resistant hose with a joint 1 of the present invention has been described based on each of the above embodiments, the present invention is not limited to the configuration of each of the above embodiments, and the structure is not limited within the scope and spirit of the present invention. Deformation is possible.

  INDUSTRIAL APPLICABILITY The pressure-resistant hose with a joint of the present invention is useful for use as a passage for supplying high-pressure oil from two facilities for lubrication and cooling of, for example, a sliding portion of one facility.

Reference Signs List 1 pressure-resistant hose with joint 2 pressure-resistant hose 2A resin tube 2B metal wire braid 3 metal pipe joint 30A first joint 30B second joint 31 outward joint part 32 inward cylindrical part 33 metal sleeve 34 annular groove 4 insulating layer 5 metal short pipe 7 Insulating exterior blade

Claims (2)

A pressure-resistant hose with a joint formed by joining metal pipe joints to both ends of the pressure-resistant hose,
The pressure-resistant hose includes a resin tube and a metal wire blade covering the tube.
The metal pipe joint includes a first joint and a second joint that are separately coupled to one end and the other end of the pressure-resistant hose,
Each joint has an outward joint portion detachable from the pipe joint on the partner facility side, and an inward cylinder portion connectable to the pressure-resistant hose, and surrounds each cylinder portion separately and is assembled to the cylinder portion. A metal sleeve forming an inwardly opened annular groove between the assembled cylindrical portion,
Insulation caps each having an L-shaped cross section are attached to the outer circumference of both ends of the pressure-resistant hose from both end sides. Sides are fitted around the outer periphery near both end faces of the pressure-resistant hose via the insulating layer,
Both ends of the pressure-resistant hose are individually inserted into each annular groove with each insulating cap and each insulating layer, and both ends of the metal wire blade are connected to each other by a resin tube, each insulating cap and each insulating layer. Each metal sleeve is insulated, and each metal sleeve is caulked, and each joint is separately fixed to both ends of the pressure-resistant hose ,
A pressure-resistant hose with a joint, characterized in that the metal wire braid comprises a double or higher-strength steel wire braid and has a metal end tube fitted to both ends of the metal wire braid . The pressure-resistant hose with a joint according to claim 1,
A pressure-resistant hose with a joint, wherein the pressure-resistant hose is covered with an insulating outer blade, and both ends of the outer blade cover the respective insulating layers and are inserted into the respective annular grooves .

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