JP2019152230A - Pressure hose with joint - Google Patents

Abstract

To provide a pressure hose with a joint which is enhanced in safety by avoiding a short circuit while possessing high pressure resistance necessary for the permission of the circulation of a high-pressure fluid (high-pressure oil).SOLUTION: A pressure hose 1 with a joint is composed of a pressure hose 2 and a metal pipe joint 3 connected to both end parts of the pressure hose. The pressure hose 2 comprises a resin tube 2A and a metal wire blade 2B for covering the tube 2A, external peripheries of both end parts of the metal wire blade 2B are coated with insulation layers 4, and insulation caps 5 are attached to both the end parts of the pressure hose. An annular groove 34 is formed of joints 30A, 30B of the metal pipe joint 3, and a metal sleeve 33 assembled to cylinder parts 32, both the end parts of the pressure hose 2 are inserted into the annular groove 34, the metal sleeve 33 is caulked in a state that both the end parts of the metal wire blade 2B are insulated from the joints 30A, 30B and the metal sleeve 33 by the resin tube 2A, the insulation caps 5 and the insulation layers 4, and a short circuit between the joints 30A, 30B is avoided.SELECTED DRAWING: Figure 1

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 lubrication and cooling of, for example, 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.

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

  Each of the joints 30A and 30B has an outward joint part 31 that can be attached to and detached from a pipe joint on the other equipment side (not shown) and an inwardly extending tubular part 32 that can be connected to the pressure hose 2, and this tubular part. A metal sleeve 33 is assembled so as to surround 32, and an annular groove 34 is formed between the metal sleeve 33 and the cylindrical portion 32 so as to open inwardly (rightward in 30A and leftward in 30B).

  By inserting one end portion of the pressure hose 2 into the annular groove 34 on the first joint 30A side, the tube portion 32 is fitted into one end portion of the tube 2A, and the other end portion of the pressure hose 2 is connected to the annular groove on the second joint 30A side. By inserting into the tube 34, the cylindrical portion 32 is fitted into the other end of the tube 2 </ b> A. Here, by crimping each metal sleeve 33, the pressure-resistant hose 1 with a joint including 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, each joint 30A, 30B is electrically short-circuited through the metal wire blade 2B having conductivity, so that the pressure-resistant hose 1 with a joint is connected. If there is a potential difference between the equipment and the two equipment, electricity will flow from one joint to the other joint, causing various adverse effects, resulting in a lack of safety.

nothing special

  The present invention has been made in view of the above circumstances, and has a high pressure resistance necessary for permitting the flow of a high-pressure fluid (for example, high-pressure oil), and with a joint that improves safety by avoiding a short circuit. The purpose is to provide a pressure hose.

In order to achieve the object, the pressure-resistant hose with a joint according to the present invention is:
A pressure-resistant hose with a joint in which metal pipe joints are joined to both ends of the pressure-resistant hose,
The pressure hose includes a resin tube and a metal wire blade that covers the tube,
The metal pipe joint is composed of a first joint and a second joint which are separated and joined to one end and the other end of the pressure hose,
Each joint has an outward joint part that can be attached to and detached from the pipe joint on the counterpart facility side, and an inward cylinder part that can be connected to the pressure-resistant hose, and is assembled to the cylinder part by surrounding each cylinder part separately. A metal sleeve that forms an annular groove that opens inwardly between the assembled cylindrical portion,
The outer periphery of both ends of the pressure hose is covered with an insulating cap having an L-shaped cross-section from both ends, and covers both end surfaces of the metal wire blade with the inner surface of one side of each insulating cap, and the other end of each cap. Are fitted on the outer periphery of the pressure hose in the vicinity of both end faces through an insulating layer,
Both ends of the pressure hose are respectively inserted into the respective annular grooves 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 crimped, and each joint is fixed to each end of the pressure hose.

According to the pressure-resistant hose with a joint having the above-described configuration, the resin tube ensures liquid leakage prevention, and the pressure resistance strength is increased by the metal wire blade so that the passage of the high-pressure fluid can be compensated for a long time. In addition, the combined action of the resin tube and the metal wire blade can effectively exhibit the essential characteristics of the pressure-resistant hose with joint, such as easy-to-use flexibility.
On the other hand, since both ends of the pressure hose including the conductive metal wire blade in its configuration are insulated from the joints and the metal sleeves by the resin tube, the insulating caps, and the insulating layers, It is possible to improve safety by avoiding a short circuit between the joints.

  The metal wire blade of the pressure hose with joint according to the present invention is composed of a double or higher high-strength steel wire blade, and includes metal end tubes that are fitted on both ends of the metal wire blade. According to this, the pressure resistance strength of the metal wire blade can be increased corresponding to the number of superposed high-strength steel wire blades. When this metal wire blade is cut alone, the vicinity of the cut surface is expanded and deformed. However, if the metal end blade is externally fitted to the metal wire blade and cut in advance, the substantially sucker-shaped expansion deformation is avoided. Is done. 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 can be improved. In addition, since the metal end tube avoids 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 irregularities on the surface. The tear is suppressed by covering.

  The metal wire blade of the pressure-resistant hose with a joint according to the present invention is covered with an insulating exterior blade, and both end portions of the exterior blade are covered with the insulating layers and inserted into the 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 the caulking. In addition, the exterior blade can protect the metal wire blade and prevent the metal wire blade from being damaged due to interference with surrounding structures and devices.

  The pressure-resistant hose with a joint according to the present invention has a liquid leakage prevention effect, can improve the pressure-resistant strength, can compensate for the passage of high-pressure fluid over a long period of time, and can obtain a flexible property that is easy to use. In addition to effectively exhibiting the essential characteristics of pressure-resistant hoses with joints, both ends of the metal wire blade are insulated against each joint and each metal sleeve, so safety is avoided by avoiding short-circuits between the joints. Can be increased.

FIG. 3 is a cross-sectional view of a half-rod showing a part of an intermediate portion showing an embodiment of a pressure-resistant hose with a joint according to claim 1 of the present invention. It is a half-rod cross-sectional view which abbreviate | omitted one part of the intermediate part which shows one Embodiment of the pressure | voltage resistant hose with a joint which concerns on Claim 2 of this invention. FIG. 5 is a half-sectional view of a half-cylinder in which an intermediate portion showing an embodiment of a pressure-resistant hose with a joint according to claim 3 of the present invention is partially omitted. FIG.

Hereinafter, preferred embodiments 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-sectional view with a part omitted of an intermediate portion showing an embodiment of a pressure-resistant hose with a joint according to claim 1 of the present invention.
The same parts as those of the conventional example in FIG.

  As shown in FIG. 1, the 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 coupled 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 knitted into a cylindrical shape by a stainless wire. It consists of a wire blade. The metal pipe joint 3 includes a stainless steel first joint 30A coupled to one end (left end) of the pressure hose 2 and a stainless steel second joint coupled to the other end (right end) of the pressure hose 2. 30B.

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

  A metal sleeve 33 is assembled to each of the joints 30A and 30B so as to surround each cylindrical portion 32. The metal sleeve 33 of the present embodiment is a stainless sleeve. By assembling the metal sleeve 33 to the cylindrical portion 32, an annular groove 34 is formed between the metal sleeve 33 and the cylindrical portion 32 so as to open inward (rightward in the first joint 30A and leftward in the second joint 30B). . The metal sleeve 33 is assembled to the cylindrical portion 32 of the first joint 30A by screwing a female screw 33b provided on the inner periphery of the assembled side end portion 33a of one metal sleeve 33 to the male screw 32d of the cylindrical portion 32. The metal sleeve 33 is assembled to the cylindrical portion 32 of the second joint 30B by screwing the female screw 33b provided on the inner periphery 33a of the other metal sleeve 33 to the male screw 32d of the cylindrical portion 32. Is made by

  In the present embodiment, the outer periphery of both ends of the pressure hose 2, that is, the outer periphery of both ends of the metal wire blade 2 </ b> B, is covered with an insulating layer 4 formed by winding an insulating tetrafluoroethylene resin tape, An insulating cap 5 made of an L-shaped cross section formed of an insulating tetrafluoroethylene resin is attached from both ends (left end and right end) of the pressure hose 2, and one side 5a of each insulating cap 5 is attached. The both ends of the metal wire blade 2B are closed by the inner surface of each of the insulation caps 5 and the other side 5b of each insulation cap 5 passes through the vicinity of the outer end surface of each insulation layer 4 and the outer periphery of the pressure hose 2 in the vicinity of the both ends. It is externally fitted and fixed to the outer periphery in the vicinity of both end faces of 2B.

  In accordance with the operation of inserting the cylindrical portions 32 of the first and second joints 30A and 30B separately into the both ends of the resin tube 2A, the both ends of the pressure hose 2 are associated with the insulating caps 5 and the insulating layers 4, respectively. Each is inserted into the annular groove 34 and one side 5 a of each insulating cap 5 abuts on 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 of each insulating cap 5 and each insulating layer 4 are insulated. Thus, the metal sleeves 33 are insulated from each other. If each metal sleeve 33 is crimped here, the pressure-resistant hose 1 with a joint which the 1st, 2nd joint 30A, 30B was fixed to the both ends of the pressure-resistant hose 2 is comprised.

  According to the pressure-resistant hose 1 with a joint having the above-described configuration, the resin tube 2A ensures liquid leakage prevention, and the pressure resistance is increased by the metal wire blade 2B made of a stainless steel wire blade, so that a high-pressure fluid (high-pressure oil) can pass therethrough. In addition to being able to compensate over a long period of time, effective characteristics of pressure hose with joint 1 can be effectively obtained, such as a flexible operation that is easy to use due to the combined action of resin tube 2A and metal wire blade 2B. Can demonstrate.

  On the other hand, both end portions of the metal wire blade 2B are insulated from the cylindrical portions 32 of the first and second joints 30A and 30B by the resin tube 2A and the insulating cap 5, and are assembled to the joints 30A and 30B. Since the metal sleeve 33 is insulated by the insulating cap 5 and the insulating layer 4, it is possible to avoid the short circuit between the joints 30 </ b> A and 30 </ b> B and improve the safety of the pressure-resistant hose 1 with joints.

Next, a pressure-resistant hose 1 with a joint according to claim 2 of the present invention will be described.
FIG. 2 is a half-sectional view with a part omitted of an intermediate portion showing an embodiment of a pressure-resistant hose with a joint according to claim 2 of the present invention.
In addition, the same code | symbol is attached | subjected to the same part as the pressure | voltage resistant hose with a joint of FIG. 1, and description of the overlapping structure and effect | action is abbreviate | omitted.

  As shown in FIG. 2, the metal wire blade 2B of the present embodiment is composed of a doubled high-strength stainless steel wire braid knitted in a cylindrical shape with a high-strength stainless steel wire, and both ends of the metal wire blade 2B. It has a metal end tube 6 fitted on the part. Each metal end tube 6 is covered with an insulating layer 4. Moreover, the metal end tube 6 of this embodiment consists of a stainless end tube.

With such a configuration, the pressure resistance of the metal wire blade 2B can be increased corresponding to the number of superposed high-strength stainless steel wire blades.
On the other hand, when the metal wire blade 2B composed of a double high-strength stainless steel wire blade is cut alone, the vicinity of the cut surface expands and deforms, so that the insulating cap 5 is attached and inserted into each annular groove 34. Can not. However, if the metal end tube 6 is externally fitted to the metal wire blade 2B and cut in advance, the expansion deformation is avoided. Therefore, the insulating cap 5 can be easily attached and inserted into each annular groove 34, and the assemblability of the pressure-resistant hose 1 with a joint is improved. In addition, since the metal end tube 6 can avoid contact between the metal wire blade 2B having a rough surface and 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. Breaking is suppressed by covering the metal end tube 6 that is not present.

Next, a pressure-resistant hose 1 with a joint according to claim 3 of the present invention will be described.
FIG. 3 is a half-sectional view with a part omitted of an intermediate portion showing an embodiment of a pressure-resistant hose with a joint according to claim 3 of the present invention.
The same parts as those in the pressure-resistant hose with joints in FIGS.

  As shown in FIG. 3, the pressure-resistant hose 2 is covered with an insulating exterior blade 7, and both end portions of the exterior blade 7 are expanded and covered with the insulating layers 4 and inserted into the annular grooves 34. . The exterior blade 7 of the present embodiment is made of an insulating glass fiber blade. By using a glass fiber blade, it is strong against heat from the outside.

  With such a configuration, caulking of each metal sleeve 33 does not directly act on each insulating layer 4, and it is possible to suppress tearing of each insulating layer 4 due to caulking. Further, the exterior blade 7 can protect the metal wire blade 2B and prevent damage to the metal wire blade 2B due to interference with surrounding structures and devices. In FIG. 3, the metal wire blade 2 </ b> B is composed of a double high-strength stainless steel wire blade and includes the metal end tubes 6 fitted on both ends of the metal wire blade 2 </ b> B. The metal wire blade 2B may be a single metal wire blade knitted into a cylindrical shape with a stainless steel wire that does not require the metal end tube 6.

  Although the pressure-resistant hose 1 with a joint 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 has a structure as long as it does not depart from its gist and technical idea. Deformation is possible.

  The pressure-resistant hose with 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.

DESCRIPTION OF SYMBOLS 1 Pressure hose with joint 2 Pressure hose 2A Resin tube 2B Metal wire blade 3 Metal pipe joint 30A First joint 30B Second joint 31 Outward joint part 32 Inward cylinder part 33 Metal sleeve 34 Annular groove 4 Insulating layer 5 Metal short pipe 7 Insulating outer blade

Claims (3)

A pressure-resistant hose with a joint in which metal pipe joints are joined to both ends of the pressure-resistant hose,
The pressure hose includes a resin tube and a metal wire blade that covers the tube,
The metal pipe joint is composed of a first joint and a second joint which are separated and joined to one end and the other end of the pressure hose,
Each joint has an outward joint part that can be attached to and detached from the pipe joint on the counterpart facility side, and an inward cylinder part that can be connected to the pressure-resistant hose, and is assembled to the cylinder part by surrounding each cylinder part separately. A metal sleeve that forms an annular groove that opens inwardly between the assembled cylindrical portion,
The outer periphery of both ends of the pressure hose is covered with an insulating cap having an L-shaped cross-section from both ends, and covers both end surfaces of the metal wire blade with the inner surface of one side of each insulating cap, and the other end of each cap. Are fitted on the outer periphery of the pressure hose in the vicinity of both end faces through an insulating layer,
Both ends of the pressure hose are respectively inserted into the respective annular grooves 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. A pressure-resistant hose with a joint, which is insulated with respect to each metal sleeve and which is crimped and has each joint fixed to both ends of the pressure-resistant hose. In the pressure-resistant hose with a joint according to claim 1,
The metal wire blade is a pressure-resistant hose with a joint, which is composed of a double or higher high-strength steel wire blade and has metal end pipes fitted on both ends of the metal wire blade. In the pressure-resistant hose with a joint according to claim 1 or 2,
The pressure-resistant hose is a pressure-resistant hose with a joint which is covered with an insulating outer blade, and both end portions of the outer blade are covered with the insulating layers and inserted into the annular grooves.

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