JP3180235U - Multi flexible hose - Google Patents

Abstract

An object of the present invention is to provide a metal malleable tube that can withstand earthquake resistance, pressure resistance and leakage in the event of a disaster such as an earthquake or fire.
An inner hose 5 made of PTFE, which is resistant to corrosion but weak in heat resistance, is covered with an inflexible hose 4 made of SUS, which is resistant to cracks and flames due to collision breakage, and further reduces temperature rise. It is characterized by a four-layer structure that is covered with a heat-resistant blade 6 made of SUS and covered with a pressure-resistant blade 7 made of SUS that prevents extension.
[Selection] Figure 1

Description

The present invention relates to a composite metal flexible tube suitable for an emergency diesel engine fuel pipe.

The shape of the fire and chemical protection resin hose used in the conventional emergency diesel engine fuel piping is a synthetic resin tube 1 as shown in FIG. A blade 2 that covers the tube 1 from the outside. A sealed heat-resistant protective cover 3 that covers the blade 2 from the outside is provided, and a retainer 8 is fixed by pressure bonding.

JP 2000-170963 A

  However, according to the above technique, even if a part of the synthetic resin tube 1 is melted by a heat or flame such as a fire and a hole is opened, the sealed heat-resistant protective cover 3 ensures that the fluid flows out to the outside. However, since the cover 3 is made of stainless steel, a hole is opened in the tube 1, and if it leaks into the cover 3, a highly corrosive fluid flows through the cover 3 and a hole is opened in the cover 3. There is a risk of leaking outside.

The blade is fixed by crimping with a metal ring-shaped blade retainer 8, but the metal ring-shaped blade retainer 8 becomes soft and loosens due to fire or heat, and the blade comes off the ring. Thus, unreasonable elongation cannot be prevented.

Therefore, this device is an inflexible hose that protects the inner hose (5) (PTFE, which is resistant to corrosion but has low heat resistance) that contacts the fluid from the outside (4) (SUS that resists cracks and flames due to collision damage). And a heat-resistant blade (6) (ECG that reduces the rise in temperature) that covers and protects the inflexible hose (4) from the outside, and a pressure-resistant blade (7) that covers and protects the heat-resistant blade (6) from the outside (7) This is a metal flexible tube characterized by a four-layer structure of SUS to prevent.

The manufacturing method is to weld the end outer diameter portion of the inflexible hose (4) and the plate inner diameter portion (11). The pressure-resistant blade (7) penetrates the flange collar inner diameter portion (12) and expands to the outer diameter portion (13) along the flange collar (2). The plate (1), pressure-resistant blade (7) and flange collar (2) are brought into close contact and welded at the outer diameter portion (13). When an unreasonable extension force is applied to the pressure-resistant blade (7), it is prevented by the flange collar corner (14) sandwiched between the plate (1) and the flange collar (2). It is an object of the present invention to provide a metal flexible tube in which an extension force is not applied to a portion where the strength of ▼ is weakened.

  In order to solve the above problems, the first device is an inflexible hose that protects the inner hose (5) (PTFE, which is resistant to corrosion but has low heat resistance) that contacts the fluid, from the outside (4) SUS that resists cracks and flames), heat-resistant blade (6) (ECG to reduce temperature rise) that covers and protects inflexible hose (4) from outside, and heat-resistant blade (6) that covers and protects heat-resistant blade (6) It is a metal flexible tube characterized by a four-layer structure of a pressure-resistant blade (7) (SUS for preventing extension).

In the second device, the end outer diameter portion of the inflexible hose (4) and the plate inner diameter portion (11) are welded by a manufacturing method. The pressure-resistant blade (7) penetrates the flange collar inner diameter portion (12) and expands to the outer diameter portion (13) along the flange collar (2). The plate (1), pressure-resistant blade (7) and flange collar (2) are brought into close contact and welded at the outer diameter portion (13). When an unreasonable extension force is applied to the pressure-resistant blade (7), it is prevented by the flange collar corner (14) sandwiched between the plate (1) and the flange collar (2). It is an object of the present invention to provide a metal flexible tube in which an extension force is not applied to a portion where the strength of ▼ is weakened.

  According to the first device or the second device, it is a metal flexible tube that maintains the original earthquake resistance and pressure resistance and is difficult to leak even in a fire by a four-layer welding method.

It is a perspective view showing one embodiment of this device. It is a perspective view which shows a prior art.

  One embodiment of this device is shown in FIG.

"Effect of the embodiment"
According to this embodiment, it is a metal flexible tube that maintains its original earthquake resistance and pressure resistance and is difficult to leak even in the event of a fire by a four-layer welding method.
"Other embodiments"
In another embodiment, the outer flexible hose {circle around (10)} may be covered from the outside so as to be a metal flexible tube characterized by a five-layer structure that is stronger against cracks and flames caused by external collision damage.

▲ 1 Plate ▲ 2 ▼ Flange collar ▲ 3Loose flange ▲ 4 ▼ Inflexible tube ▲ 5 ▼ Inner hose ▲ 6 ▼ Heat resistant blade ▲ 7 ▼ Pressure resistant blade ▲ 8 ▼ Backup gasket ▲ 9 ▼ Connection pipe ▲ 10 ▼ Out flexible Tube ▲ 11 ▼ Plate inner diameter ▲ 12 ▼ Flange collar inner diameter ▲ 13 ▼ Outer diameter ▲ 14 ▼ Flange collar corner

  It is a perspective view showing one embodiment of this device.   It is a perspective view which shows a prior art.   It is a perspective view which shows other embodiment.

Claims (2)

Inner hose in contact with fluid (5) (PTFE that is resistant to corrosion but low in heat resistance) is covered from the outside, and inflexible hose (4) (SUS that is resistant to cracks and flames due to collision damage) and inflexible hose (▲) 4 of heat-resistant blade (6) (ECG for mitigating temperature rise) that covers and protects 4 ▼ from the outside, and pressure-resistant blade (7) (SUS that prevents extension) that protects and heat-resistant blade (6) from the outside. It is a metal flexible tube characterized by a layer structure. The manufacturing method is to weld the end outer diameter portion of the inflexible hose (4) and the plate inner diameter portion (11). The pressure-resistant blade (7) penetrates the flange collar inner diameter portion (12) and expands to the outer diameter portion (13) along the flange collar (2). The plate (1), pressure-resistant blade (7) and flange collar (2) are brought into close contact and welded at the outer diameter portion (13). When an unreasonable extension force is applied to the pressure-resistant blade (7), it is prevented by the flange collar corner (14) sandwiched between the plate (1) and the flange collar (2). It is an object of the present invention to provide a metal flexible tube in which an extension force is not applied to a portion where the strength of ▼ is weakened.

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