JP7440856B1 - heat resistant hose - Google Patents

Abstract

The present invention provides a heat-resistant hose whose periphery is covered with a metal casing, in which a flexible metal casing can be easily attached and detached. SOLUTION: A heat-resistant hose including a hose body 10, a metal casing 30 that covers the outer circumference of the hose body 10, and a jig 40 attached to an end of the metal casing 30. By spirally winding a metal band member 31 and interlocking the overlapping parts of the band member 31, an interlock tube is formed with spiral unevenness 32 on the outer circumference, and the jig 40 is made of metal. The jig cylindrical portion includes a jig bottom plate portion 41 provided with an opening 41a having an inner diameter smaller than the outer diameter of the casing 30, and a jig cylindrical portion 42 rising from the peripheral edge of the jig bottom plate portion 41. The inner circumferential portion of 42 is provided with an unevenness 42a for screwing into the spiral unevenness 32. [Selection diagram] Figure 1

Description

The present invention relates to a heat-resistant hose.

Furnaces installed in steel plants are connected to various types of piping for supplying oil and gas. This type of piping is sometimes connected to moving parts of coke ovens. In that case, the piping is configured with a flexible hose so that the piping can follow the movement of the movable parts.

In addition, as the furnace continues to operate, wear and tear occur on the inner walls of the furnace. To repair these inner walls, refractory is supplied from outside the furnace into the furnace, and then the refractory is applied to the inner walls of the furnace. It is done by spraying. Flexible hoses are also used to supply refractories.

These hoses are designed to be heat resistant because they are used in high-temperature environments. Various types of heat-resistant hoses have been proposed so far.

For example, FIG. 3 of Patent Document 1 shows a heat-resistant hose 20 in which the outer peripheral portion of the hose 21 is covered with a first protection member 22 and a second protection member 23. As the first protection member 22, a heat insulating material made of inorganic fibers such as ceramic fibers is used (paragraph 0018 of the same document). On the other hand, a metal net or fabric is used as the second protection member 23 (paragraph 0019 of the same document). Both the first protection member 22 and the second protection member 23 are configured to have heat resistance of 500° C. or higher and flexibility.

Further, FIG. 2 of Patent Document 2 shows a heat-resistant hose having a structure in which the outer circumference of a rubber hose 10 is covered with a heat-resistant member 20, and the periphery of the heat-resistant member 20 is covered with a metal casing 30 with an air layer 40 interposed therebetween. 100 is listed. The heat-resistant member 20 is a glass blade in which glass threads are woven into a tube shape (paragraph 0015 of the same document). On the other hand, as shown in FIG. 3 of the same document, the metal casing 30 is made up of a large number of SUS metal ring bodies 31 connected in a bellows shape, and has flexibility ( Paragraph 0016 of the literature).

Japanese Patent Application Publication No. 2003-322477 Japanese Patent Application Publication No. 2018-112270

However, the heat-resistant hose of Patent Document 1 cannot be used for a long period of time in a harsh environment such as a coke oven. This is because heat-resistant hoses used in coke ovens may be directly hit by scattered red-hot coke, which may cause holes to form. Heat-resistant hoses such as those disclosed in Patent Document 1 generally need to be replaced every 1 to 3 months, although this depends on the specific installation location.

On the other hand, since the heat-resistant hose of Patent Document 2 is provided with a metal casing on the outside thereof, the rubber hose inside the hose can be protected from the impact of flying red-hot coke and the like. Therefore, the life of the rubber hose can be extended. However, the rubber hose may still need to be replaced. In that case, the metal casing would be removed from the rubber hose. However, the heat-resistant hose of Patent Document 2 has a drawback that the metal casing cannot be easily removed.

This is because, as shown in FIG. 3 of the same document, the heat-resistant hose of Patent Document 2 is constructed by placing the third cap 32 on the end of the metal casing 30 and tightening the third cap 32 from the outside. , the metal casing 30 is fixed to the rubber hose 10 (paragraph 0018 of the same document). Therefore, in order to remove the metal casing 30, it is necessary to deform the third cap 32.

Further, in the heat-resistant hose of Patent Document 2, the metal casing 30 is plastically deformed by crimping when attached to the rubber hose 10. Therefore, even if only the rubber hose 10 suffers wear and tear and the metal casing 30 does not (if you want to replace only the rubber hose 10), the metal casing 30 must also be replaced with a new one. Sometimes. Although it is desired to replace only the rubber hose 10, it is uneconomical to have to replace the metal casing 30 as well.

The present invention has been made to solve the above problems, and provides a heat-resistant hose in which the hose body is covered with a flexible metal casing, in which the metal casing can be easily attached and detached. With the goal.

The above issues are
The hose body,
a flexible metal casing that covers the outer periphery of the hose body;
A heat-resistant hose comprising a jig attached to an end of the metal casing to restrict movement of the metal casing relative to the hose body,
The metal casing is an interlock tube in which spiral irregularities are formed on the outer or inner circumference of the metal casing by winding a metal band member in a spiral shape and engaging the overlapping parts of the band members,
The jig is
a jig bottom plate portion provided with an opening (an opening having an inner diameter smaller than the outer diameter of the metal casing) for leading out the hose body or its connecting parts from the metal casing;
A jig cylindrical part rising from the peripheral edge of the jig bottom plate part,
The problem is solved by providing a heat-resistant hose characterized in that the inner circumference or outer circumference of the cylindrical part of the jig is provided with projections and depressions for screwing into the spiral irregularities. be done.

As described above, spiral irregularities are formed on the outer circumferential portion and the inner circumferential portion of the interlock tube. In this regard, in the heat-resistant hose of the present invention, the helical irregularities in the interlock tube are used as thread grooves or screw threads (the helical irregularities are used as the irregularities for threading provided on the jig cylindrical part). A structure is adopted in which the cylindrical part of the jig is directly screwed into the interlock tube. By adopting this structure, the jig can be securely fixed to the interlock tube without crimping the cylindrical part of the jig.

The above-mentioned unevenness for screwing may be provided on either the inner circumference or the outer circumference of the cylindrical part of the jig. When the inner peripheral part of the jig cylindrical part is provided with projections and depressions for screwing, the jig cylindrical part is in a state of enveloping the end of the interlock tube (covering the outside of the interlock tube), It is attached to the interlock tube, and the projections and depressions for screwing are screwed into the projections and depressions on the outer periphery of the interlock tube. On the other hand, when the outer periphery of the jig cylindrical part is provided with projections and recesses for screwing, the jig cylindrical part is enclosed in the end of the interlock tube (inserted inside the interlock tube). state), it is attached to the interlock tube, and the threaded projections and depressions are screwed into the projections and depressions on the inner circumference of the interlock tube. The unevenness for screwing is also usually formed in a spiral shape.

In addition, by twisting the jig in one direction relative to the interlock tube, the jig can be attached to the interlock tube, and by twisting in the other direction, the jig can be removed from the interlock tube. . That is, the jig can be easily attached to and detached from the interlock tube without using tools or the like. Furthermore, there is no need to destroy the interlock tube or the jig when attaching or removing the jig. Further, at this time, there is almost no plastic deformation of the interlock tube or the jig. Therefore, the interlock tube after removing the jig or the jig removed from the interlock tube can be used as is. Therefore, the hose main body can be replaced economically.

An interlock tube is a metal band member wound spirally and the overlapping parts of the band members are interlocked.There are several types of interlock tubes depending on the interlocking form of the overlapping parts, etc. be. For example, there are things called "casing tubes" and "semi-interlock tubes."

Among these, "casing tube" is
As the above band member,
an outward-facing band-shaped member with both side edges thereof erected outward (radially outward of the interlock tube);
Using an inward-facing band-like member with both side edges facing inward (radially inside the interlock tube),
In the process of winding an outward-facing band member in a spiral, the inward-facing band member is applied from the outside to the gap part (the gap area formed in a spiral shape) of the outward-facing band member, and is wound spirally. By rolling it up, it has a structure in which the standing portion of the outward facing band member and the standing portion of the inward facing band member are engaged with each other.

Also, what is "semi-interlock tube"?
The above band-shaped member has one side edge folded back to have a U-shaped cross section on the outer side, and the other side edge folded back to have a U-shaped cross section on the inner side (the whole has an S-shaped cross section). (bent)
In the process of spirally winding the band-like member, the folded part of the band-like member in one winding row is engaged with the folded-back part of the belt-like member in the next winding row.

In the heat-resistant hose of the present invention, various interlock tubes can be used as the metal casing, but it is particularly preferable to use a semi-interlock tube. This makes it possible to strengthen the interlocking of the band members in the interlock tube (metallic casing) and increase the durability of the interlock tube. In addition, since the interlock tube (metal casing) is less likely to expand or contract, it is possible to stabilize the size and shape of the spiral irregularities formed on the outer or inner circumference of the interlock tube. If the dimensions and shape of the spiral irregularities are stable, it becomes easier to screw the jig into the interlock tube.

In the heat-resistant hose of the present invention,
A nipple press-fitted into the end of the hose body;
a rotating adapter connected to the opposite end of the nipple from being press-fitted into the hose body;
a cylindrical socket that is crimped to the outer periphery of the hose body and the nipple while straddling the hose body and the nipple;
It consists of an annular member that is fitted onto the outside of a cylindrical socket, and when the jig attempts to move toward the hose body, it comes into contact with the bottom plate of the jig, preventing the jig from penetrating any further into the hose body. It is also preferable to further include an annular stopper for regulating the movement of the jig.

A device (such as a pump) for supplying fluid into the hose body and a device (such as a nozzle) for ejecting fluid flowing inside the hose body are connected to the rotation adapter. By using a nipple and a rotation adapter, the degree of freedom in handling the heat-resistant hose can be increased while making it difficult for fluid to leak at the connection between the hose body and the above-mentioned equipment.

Further, by tightening the cylindrical socket while straddling the hose body and the nipple, it is possible to prevent the nipple from coming off from the hose body. This cylindrical socket is crimped and plastically deformed when attached to the hose body, so when replacing the hose body, it is necessary to replace it with a new one. It is economical compared to replacing the entire casing.

Furthermore, by providing the annular stopper, it becomes possible to regulate the position of the jig in the longitudinal direction of the hose body (the position of the end of the metal casing in the longitudinal direction of the hose body) within a predetermined range. In addition, since the outer circumferential surface of the annular stopper comes into contact with the inner circumferential surface of the metal casing, it is also possible to regulate the position of the jig in the radial direction of the hose body. For this reason, it is also possible to center the hose body with respect to the metal casing and form a predetermined gap (air layer) between the inner circumferential surface of the metal casing and the outer circumferential surface of the hose body.

In the heat-resistant hose of the present invention,
The maximum outer diameter of the cylindrical socket and the maximum outer diameter of the nipple are set smaller than the inner diameter of the opening in the jig bottom plate,
It is also preferable that the maximum outer diameter of the rotary adapter is set larger than the inner diameter of the opening in the jig bottom plate.

By making the maximum outer diameter of the cylindrical socket and the maximum outer diameter of the nipple smaller than the inner diameter of the opening in the jig bottom plate, the nipple and the cylindrical socket can be passed through the opening in the jig bottom plate. become able to. For this reason,
[1] Pass the hose body into the metal casing.
[2] Attach the nipple and cylindrical socket to the end of the hose body.
[3] Pass the nipple and cylindrical socket through the opening of the bottom plate of the jig, and screw the cylindrical part of the jig to the end of the metal casing.
[4] Attach a rotation adapter to the end of the nipple opposite to the side connected to the hose body.
By going through these steps, the heat-resistant hose of the present invention can be easily assembled.

In addition, by making the maximum outer diameter of the rotating adapter larger than the inner diameter of the opening in the jig bottom plate, when the jig attempts to move to the opposite side of the metal casing (toward the rotating adapter side), The rotation adapter comes into contact with the bottom plate of the jig and gets caught. Therefore, it is possible to prevent the jig from falling off from the hose body.

In the heat-resistant hose of the present invention,
On the outer circumferential surface of the hose body,
Inner layer made of aluminum,
an intermediate layer made of carbon cloth, and
Provides a heat-resistant coating consisting of an outer layer made of aluminum,
It is also preferred that the end section of the heat-resistant coating is placed over the outer peripheral surface of the cylindrical socket and fixed by crimping the annular stopper.

Here, "heat-resistant coating" means a heat-resistant coating that includes at least the above three layers (inner layer, outer layer, and intermediate layer), and also includes the case where another layer is added to make the total number of layers four or more. be. This heat-resistant coating not only reinforces the hose body but also increases its heat resistance. Specifically, the carbon cloth used for the intermediate layer not only has excellent heat resistance, flame retardance, and flame resistance, but also has excellent toughness while being lightweight and flexible. Furthermore, the aluminum used for the inner and outer layers easily reflects radiant heat and can protect the hose body from heat.

Furthermore, the heat-resistant coating can be firmly fixed to the hose body by placing the end section of the heat-resistant coating over the outer peripheral surface of the cylindrical socket and tightening the annular stopper. In this case, the annular stopper is crimped and plastically deformed, so when replacing the hose body, it would be necessary to replace it with a new one, but since it is a small and inexpensive part, the entire metal casing has to be replaced. It is economical compared to the case where

As described above, according to the present invention, in a heat-resistant hose in which the periphery of the hose body is covered with a flexible metal casing, it becomes possible to easily attach and detach the metal casing.

FIG. 2 is a cross-sectional view showing a heat-resistant hose cut along a plane including its center line. FIG. 7 is a cross-sectional view showing a metal casing and a jig in a heat-resistant hose according to another embodiment, cut along a plane including the center line thereof.

The heat-resistant hose of the present invention will be described in more detail with reference to the drawings. However, the content described below is only a preferred embodiment, and the technical scope of the heat-resistant hose of the present invention is not limited to the configuration described below. The heat-resistant hose of the present invention can be modified as appropriate without departing from the spirit of the invention.

1. Overview of Heat-Resistant Hose FIG. 1 is a sectional view showing a heat-resistant hose cut along a plane including the center line L thereof. As shown in FIG. 1, the heat-resistant hose of this embodiment includes a hose body 10, a heat-resistant coating 20, a metal casing 30, a jig 40, a nipple 50, a rotation adapter 60, and a cylindrical socket 70. , and an annular stopper 80. This heat-resistant hose can be suitably used in a high-temperature environment such as in or near a furnace installed in a steelworks.

Each member constituting the heat-resistant hose of this embodiment will be described in detail below.

2. Hose Body The hose body 10 is for allowing fluid (gas or liquid) to flow therein. The hose main body 10 is made of flexible rubber, resin, or the like. In the heat-resistant hose of this embodiment, the hose main body 10 is a pressure-resistant hose (a hose whose pressure resistance is increased by embedding a reinforcing layer in a molding material such as rubber). , which is manufactured by winding reinforcing threads into a net shape and covering the outside with rubber.)

3. Heat-resistant Coating The heat-resistant coating 20 is provided to cover the outer circumference of the hose body 10. Thereby, the hose main body 10 can be protected from heat. This heat-resistant coating 20 has a three-layer structure consisting of an inner layer 21 made of aluminum, an intermediate layer 22 made of carbon cloth, and an outer layer 23 made of aluminum. Among these, the carbon cloth used for the intermediate layer 22 not only has excellent heat resistance, flame retardancy, and flame resistance, but also has excellent toughness while being lightweight and flexible. Further, the aluminum used for the inner layer 21 and the outer layer 23 has a function of reflecting radiant heat.

In the heat-resistant hose of this embodiment, the inner layer 21 is formed by wrapping aluminum foil around the outer peripheral surface of the hose body 10, and then the intermediate layer 22 is formed by wrapping carbon cloth around the outer peripheral surface of the inner layer 21. Finally, an outer layer 23 is formed by wrapping an aluminum cloth around the outer peripheral surface of the intermediate layer 22. Although most sections of the heat-resistant coating 20 are in contact with the outer circumferential surface of the hose body 10, the end sections thereof are hung over the outer surface of a cylindrical socket 70, which will be described later.

The thickness of the inner layer 21 (thickness of the aluminum foil) is not particularly limited, but is usually about 0.01 to 0.5 mm, preferably in the range of 0.02 to 0.2 mm. The thickness of the intermediate layer 22 (thickness of the carbon cloth) is also not particularly limited, but is usually about 0.5 to 3 mm, preferably in the range of 1 to 2 mm. Further, the thickness of the outer layer 23 (thickness of the aluminum cloth) is also not particularly limited, but is usually about 0.01 to 0.5 mm, preferably in the range of 0.02 to 0.2 mm.

4. Metal Casing The metal casing 30 is a tubular member disposed to cover the outer circumference of the hose body 10. This metal casing 30 has a function of protecting the hose body 10 from impacts of flying objects (such as red hot coke in a coke oven). In the heat-resistant hose of the present invention, an interlock tube is used as the metal casing 30. The interlock tube has excellent impact resistance and is flexible enough to follow the hose body 10. There are various types of interlock tubes, such as semi-interlock tubes and casing tubes. In the heat-resistant hose of this embodiment, a semi-interlock tube is used as the metal casing 30.

Interlock tubes, including semi-interlock tubes, are formed by spirally winding metal strip members 31 and engaging the overlapping portions of the strip members 31. The material of the metal casing 30 (the material of the strip member 31) is not particularly limited as long as it is a metal, but stainless steel (SUS) is usually used.

In the metal casing 30 (semi-interlock tube) of the heat-resistant hose of this embodiment, one side edge is folded back to have a U-shaped cross section on the outer surface side, and the other side edge is on the inner surface side. The belt-like member 31 is folded back into a U-shaped cross section (the whole is bent into an S-shaped cross-section), and in the process of spirally winding the belt-like member 31, the length of the belt-like member 31 in a certain winding row is A structure is used in which the folded portion is engaged with the folded portion of the strip member 31 in the adjacent winding row. In the semi-interlock tube, the band members 31 are strongly engaged with each other and have excellent durability. In addition, it is difficult to expand and contract in the longitudinal direction.

As described above, the metal casing 30 made of an interlock tube such as a semi-interlock tube is formed by spirally winding the band member 31, so that the outer periphery thereof has spiral irregularities 32. It is formed. This spiral unevenness 32 can be used as a screw groove (in the case of a concave portion) or a thread (in the case of a convex portion). However, if the dimensions (pitch, etc.) and shape of the unevenness 32 change, it becomes difficult to use the unevenness 32 as a thread groove or thread. Therefore, the dimensions and shape of the unevenness 32 can be stabilized.

The pitch of the spiral concavo-convex portions 32 (the pitch between adjacent concave portions or the pitch between adjacent convex portions) is not particularly limited. However, if the pitch of the unevenness 32 is made too narrow, the number of turns of the strip member 31 becomes too large, which may make such processing difficult. For this reason, the pitch of the unevenness 32 is usually 2 mm or more, preferably 5 mm or more. On the other hand, if the pitch of the unevenness 32 is made too wide, the number of windings of the strip member 31 becomes too small, which may reduce the flexibility of the metal casing 30. Therefore, the pitch of the unevenness 32 is usually 30 mm or less, preferably 20 mm or less, and more preferably 10 mm or less.

The step (depth (when considered as a recess) or height (when considered as a convex part) of the spiral unevenness 32 is not particularly limited. However, as will be described later, this unevenness 32 has a jig cylinder. When the unevenness 42a of the shaped portion 42 is screwed together, if the level difference between the unevenness 32 is small, it may become difficult to firmly screw together the unevenness 32 and the unevenness 42a.For this reason, the level difference between the unevenness 32 is usually 0. .5 mm or more, preferably 1 mm or more, more preferably 1.5 mm or more.However, on the other hand, if the height difference of the unevenness 32 is increased, when trying to bend the metal casing 30 In addition, there is a risk that adjacent convex portions of the unevenness 32 will butt against each other, making it difficult to bend the metal casing 30 as expected.Furthermore, the diameter of the metal casing 30 is made considerably larger than the diameter of the hose body 10. For this reason, the level difference of the unevenness 32 is usually 10 mm or less, preferably 5 mm or less, and more preferably 3 mm or less.

5. Jig The jig 40 is a member attached to the end of the metal casing 30 in order to restrict movement of the metal casing 30 with respect to the hose body 10. The jig 40 is usually made of metal. The jig 40 can be made of stainless steel (SUS) like the metal casing 30, but considering cost etc., it can be made of SS material (general structural rolled steel material) such as SS400 or SC material such as S45C. (carbon steel material), iron, etc. can be suitably used. The jig 40 is a cap-shaped member that includes a jig bottom plate part 41 and a jig cylindrical part 42 rising from the peripheral edge of the jig bottom plate part 41. An opening 41 a is provided in the center of the jig bottom plate 41 . On the other hand, the inner circumferential portion of the jig cylindrical portion 42 is spirally provided with projections and depressions 42a for screw engagement. This screwing unevenness 42a has a structure for screwing into the spiral unevenness 32 formed on the outer peripheral portion of the metal casing 30. Therefore, the recesses and recesses 42a for screwing are set to a size and shape that can be screwed into the recesses and recesses 32 of the metal casing 30.

By adopting a structure in which the spiral unevenness 42a of the jig cylindrical part 42 is screwed into the unevenness 32 of the metal casing 30, the metal casing can be easily attached to the metal casing without crimping the jig cylindrical part 42. The jig 40 can be firmly fixed to the jig 30. Further, the jig 40 can be easily attached to and detached from the metal casing 30 without using tools or the like. Furthermore, when attaching and detaching the jig 40, there is no need to destroy the metal casing 30 or the jig 40. In addition, there is almost no plastic deformation of the metal casing 30 or the jig 40 at that time. Therefore, the metal casing 30 after removing the jig 40 or the removed jig 40 can be used as is. Therefore, the hose main body 10 can be replaced economically.

The inner diameter of the opening 41a of the jig bottom plate 41 is set smaller than the outer diameter of the metal casing 30. Therefore, as the jig cylindrical part 42 is screwed into the metal casing 30, the jig bottom plate part 41 will eventually come into contact with the end of the metal casing 30, and the jig cylindrical part 42 will close at that point. After being positioned, the jig 40 becomes integrated with the metal casing 30.

The inner diameter of the opening 41a of the jig bottom plate 41 is compared with the outer diameter of an annular stopper 80 (this annular stopper 80 is immovably fixed to the end of the hose body 10), which will be described later. It is also set small. Therefore, even if the metal casing 30 tries to move to the right side as viewed from the page of FIG. It's supposed to stop.

Furthermore, the inner diameter of the opening 41a of the jig bottom plate portion 41 is set smaller than the maximum outer diameter of an adapter fixing portion 61 constituting a rotation adapter 60, which will be described later. Therefore, even if the metal casing 30 tries to move to the left side relative to the hose body 10 when viewed from the paper surface of FIG. is now stopped.

In this way, in the heat-resistant hose of this embodiment, the jig bottom plate part 41 of the jig 40 hits the annular stopper 80 and the adapter fixing part 61 (rotary adapter 60), so that the heat-resistant hose is rotated along the center line L of the heat-resistant hose. The movement of the metal casing 30 relative to the hose body 10 in this direction is restricted.

In addition, the inner diameter of the opening 41a of the jig bottom plate 41 is set to be slightly larger than the maximum outer diameter of the cylindrical socket 70, the nipple 50, and the adapter fixing part 61, which will be described later. Therefore, when the metal casing 30 attempts to move in a direction perpendicular to the center line L of the heat-resistant hose (radial direction of the hose body 10), the inner circumferential surface of the opening 41a touches the outer circumferential surface of the cylindrical socket 70, etc. It's like they're hitting each other. Thereby, the positions of the jig 40 and the metal casing 30 in the radial direction of the hose body 10 are also regulated.

A predetermined gap (air layer α) is formed between the inner peripheral surface of the metal casing 30 and the outer peripheral surface of the hose body 10, and the position of the metal casing 30 in the radial direction of the hose body 10 is By regulating this, it is possible to firmly secure this air layer α. Since the air layer α functions as a heat insulating layer, by ensuring the air layer α, the hose main body 10 can be made less susceptible to damage due to heat.

Furthermore, since the air layer α also functions as a shock absorption layer, even if a flying object collides with the outer peripheral surface of the metal casing 30, the metal casing 30 in that part It is also possible to avoid contacting the outer circumferential surface of the heat-resistant coating 20 (strictly speaking, the outer circumferential surface of the heat-resistant coating 20). Therefore, the hose main body 10 can also be made less susceptible to damage due to impact. In addition, the presence of the air layer α has the advantage of increasing the degree of freedom in bending the metal casing 30 and making it easier to handle the heat-resistant hose.

In this way, the air layer α has various advantages, and by centering the hose body 10 with respect to the metal casing 30 using the jig 40, the inner peripheral surface of the metal casing 30 and the hose body The air layer α is easily formed appropriately between the outer circumferential surface of 10 and the outer circumferential surface of

5. Nipple The nipple 50 is attached to the end of the hose body 10 in a press-fitted state. This nipple 50 is usually formed of metal. The nipple 50 can also be made of stainless steel (SUS) like the metal casing 30, but like the jig 40, considering cost etc., it can be made of SS material (general structural rolled steel material) such as SS400, SC materials (carbon steel materials) such as S45C, iron, etc. can be suitably used. By press-fitting the nipple 50 into the hose body 10, fluid can flow between the hose body 10 and equipment such as a pump or a nozzle without leakage. As the nipple 50, a conventionally known commercial product can be used.

6. Rotation Adapter The rotation adapter 60 is a member that allows rotation of the heat-resistant hose around the center line L. This rotation adapter 60 is also usually formed of metal (the same metal as the jig 40 and the nipple 50). The rotation adapter 60 is connected to an adapter fixing part 61 that is immovably fixed to the above-mentioned equipment (pump, nozzle, etc.) connected to the hose body 10, and rotatably connected to the adapter fixing part 61. and an adapter rotating section 62. The adapter rotation part 62 is fixed to the nipple 50 without moving. By providing this rotation adapter 60, the degree of freedom in handling the heat-resistant hose can be increased.

7. Tubular Socket The cylindrical socket 70 is for holding the hose body 10 against the nipple 50 so that the nipple 50 does not come off from the hose body 10. This cylindrical socket 70 is also usually formed of metal (the same metal as the jig 40 and the nipple 50). The cylindrical socket 70 is fitted over both the hose body 10 and the nipple 50, and is crimped to the outer peripheries of the hose body 10 and the nipple 50. In the heat-resistant hose of this embodiment, the cylindrical socket 70 is tightened in all directions. As a result, the end of the hose body 10 is firmly held between the inner circumferential surface of the cylindrical socket 70 and the outer circumferential surface of the nipple 50.

8. Annular Stopper The annular stopper 80 is fixed to the outer peripheral surface of the cylindrical socket 70. This annular stopper 80 has the function of regulating the movement of the metal casing 30 (movement on the right side when viewed from the page of FIG. 1) by coming into contact with the jig bottom plate 41, and the function of coming into contact with the inner peripheral surface of the metal casing 30. It has a function of regulating the movement of the metal casing 30 (the radial movement of the hose body 10) by coming into contact with it. Therefore, the outer diameter of the annular stopper 80 is set to be substantially the same as the inner diameter of the metal casing 30. This annular stopper 80 is also usually formed of metal (the same metal as the jig 40 and the nipple 50).

As already mentioned, in the heat-resistant hose of the present embodiment, the structure in which the cylindrical socket 70 is crimped is adopted, and by crimping the annular stopper 80 to the cylindrical socket 70, In addition to being fixed to the hose body 10, the cylindrical socket 70 is also crimped to the hose body 10 (strictly speaking, the nipple 50 inside the hose body 10). Further, the end section of the heat-resistant coating 20 is also hung on the outer circumferential surface of the cylindrical socket 70, and the annular stopper 80 is provided with the heat-resistant coating between the inner circumferential surface and the outer circumferential surface of the cylindrical socket 70. It also has the function of keeping the end sections of 20 firmly clamped.

7. How to use The heat-resistant hose of the present embodiment described above can be assembled, for example, by the following procedure.
[Step 1] A heat-resistant coating 20 is provided on the outer periphery of the hose body 10.
[Step 2] Pass the hose body 10 into the metal casing 30.
[Step 3] Attach the nipple 50 and the cylindrical socket 70 to the end of the hose body 10. At this time, the end section of the heat-resistant coating 20 is hung on the outer peripheral surface of the cylindrical socket 70.
[Step 4] The nipple 50 and the cylindrical socket 70 are passed through the opening 41a of the jig bottom plate 41, and the jig cylindrical part 42 is screwed onto the end of the metal casing 30.
[Step 5] Attach the rotation adapter 60 to the opposite end of the nipple 50 from the side connected to the hose body 10.

Furthermore, when replacing the hose body 10, the hose body 10 can be removed by, for example, the following procedure.
[Step 1] Remove the rotation adapter 60 from the nipple 50.
[Step 2] Turn the jig 40 to the metal casing 30 to unthread it, and remove the jig 40 by pulling it out to the opposite side of the hose body 10.
[Step 3] Remove the nipple 50 from the hose body 10.
[Step 4] Pull out the hose body 10 from the inside of the metal casing 30.

In this way, in the heat-resistant hose of the present embodiment, the metal casing 30 can be assembled to or separated from the hose body 10 in a simple procedure by using the screw type jig 40. Moreover, since the metal casing 30 and the metal casing 30 are not subjected to plastic deformation such as caulking, the metal casing 30 and the metal casing 30 can be used repeatedly.

8. Others In the above, as shown in FIG. 1, the threaded engagement unevenness 42a provided on the inner circumference of the jig cylindrical portion 42 is screwed into the spiral unevenness 32 provided on the outer circumference of the metal casing 30. As explained in the case above, as shown in FIG. It may be made to match. FIG. 2 is a sectional view showing a metal casing 30 and a jig 40 in a heat-resistant hose according to another embodiment, cut along a plane including the center line L thereof. In this way, when the unevenness 42a for screwing is provided on the outer circumference of the jig cylindrical part 42, the jig cylindrical part 41 is inserted inside the end of the metal casing 30, and the unevenness 42a for screwing 42a is screwed into the spiral concavities and convexities 32 of the metal casing 30.

10 Hose body 20 Heat-resistant coating 21 Inner layer 22 Intermediate layer 23 Outer layer 30 Metal casing 31 Band member 32 Spiral unevenness 40 Jig 41 Jig bottom plate 41a Opening 42 Jig cylindrical part 42a Unevenness for screwing 50 Nipple 60 Rotating adapter 61 Adapter fixing part 62 Adapter rotating part 70 Cylindrical socket 80 Annular stopper L Center line of heat-resistant hose α Air layer

Claims (4)

The hose body,
a flexible metal casing that covers the outer periphery of the hose body;
A heat-resistant hose comprising a jig attached to an end of the metal casing to restrict movement of the metal casing relative to the hose body,
A nipple press-fitted into the end of the hose body;
a rotating adapter connected to the opposite end of the nipple from being press-fitted into the hose body;
a cylindrical socket that is crimped to the outer periphery of the hose body and the nipple while straddling the hose body and the nipple;
It consists of an annular member that is fitted onto the outside of a cylindrical socket, and when the jig attempts to move toward the hose body, it comes into contact with the bottom plate of the jig, preventing the jig from penetrating any further into the hose body. It further includes an annular stopper for regulating the movement of the jig, and
The metal casing is an interlock tube in which spiral irregularities are formed on the outer or inner circumference of the metal casing by winding a metal band member in a spiral shape and engaging the overlapping parts of the band members,
The jig is
a jig bottom plate portion provided with an opening for leading out the hose body or its connecting parts from the metal casing;
A jig cylindrical part rising from the peripheral edge of the jig bottom plate part,
1. A heat-resistant hose, characterized in that an inner circumferential portion or an outer circumferential portion of the jig cylindrical portion is provided with a threaded engagement unevenness for screwing into the spiral unevenness.
The maximum outer diameter of the cylindrical socket and the maximum outer diameter of the nipple are set smaller than the inner diameter of the opening in the jig bottom plate,
The heat-resistant hose according to claim 1, wherein the maximum outer diameter of the rotary adapter is set larger than the inner diameter of the opening in the jig bottom plate.
On the outer circumferential surface of the hose body,
Inner layer made of aluminum,
an intermediate layer made of carbon cloth, and
A heat-resistant coating consisting of an outer layer made of aluminum is provided,
3. The heat-resistant hose according to claim 2 , wherein the end section of the heat-resistant coating is placed over the outer peripheral surface of the cylindrical socket and fixed by crimping an annular stopper.
Any one of claims 1 to 3, wherein the metal casing is a semi-interlock tube in which the metal band member is spirally wound while engaging the folded portions of the side edge of the metal band member to have a U-shaped cross section. Heat resistant hose as described.

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