JPH058399Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is suitable for suction of abrasive fluids such as solid materials such as powder and granular materials of various shapes, or mixtures of these materials dispersed in liquids. and a hose used for pressure feeding, the inner surface of the hose is constructed by connecting sintered wear-resistant material units by three-dimensional fitting,
The present invention relates to a wear-resistant hose for high temperatures that can maintain wear resistance, pressure resistance, and flexibility for a long period of time at high temperatures.

[Conventional technology]

In conventional technology that uses this sintered wear-resistant material, very hard spherical or plate-shaped particles such as ceramic are embedded in a rubber elastic body or ceramic tiles are placed on the inner surface of the hose that comes into contact with the fluid. It was attached to rubber to form a flexible, wear-resistant surface.

For example, in Utility Model Application Publication No. 58-142474 (name of the invention: wear-resistant rubber hose), as the scope of the utility model registration claim, ``Granular bodies made of wear-resistant material 3 on the surface layer of the inner peripheral surface 2 A wear-resistant rubber hose characterized by having a rubber hose embedded therein is disclosed.

In addition, Japanese Patent Application Laid-open No. 55-129433 (title of invention:
The patent claims for ``abrasion-resistant rubber lining'' include ``a hard sintered metal or sintered porcelain with an average particle size of 0.05 to 10 mm and a Mohs hardness of 7 (Knoop hardness 820) or more. The particles of JIS-
Spring hardness A type specified in K6301 physical test method for vulcanized rubber, 10 to 60% by volume of rubber with a hardness of 20 to 90.
A wear-resistant rubber lining material in which the above particles and rubber are bonded together by dispersion mixing is disclosed.

In addition, as other configurations, Utsukun Sho 60-31574
The publication discloses a "ceramic tile lined rubber hose" in which a large number of plate-like bodies are fixed to an inner rubber surface. As described in the claims, in other words, a through hole is provided that penetrates from one end side of a thin, substantially rectangular ceramic tile to the other end, and a large number of the ceramic tiles are passed through a flexible wire, This is a ceramic tile lined rubber hose characterized by being formed into a band shape, wound spirally, and fixed to inner rubber.

As described above, since ceramic itself does not have elasticity, it has not been possible to break away from the configuration in which flexibility depends on the rubber-like elastic body between ceramics. Therefore, the wear resistance of the hose is better as more wear-resistant ceramic is exposed on the inner surface of the hose, and conversely, the flexibility is better as the amount of rubber-like elastic material exposed on the inner surface of the hose is greater. It is. However, when placing a non-stretchable, wear-resistant material on the inner surface of the hose, which requires flexibility, a rubber-like elastic material that holds any particles or plate-like pieces must be used. was something that was exposed on the inside. Therefore, the connecting rubber-like elastic body wears out faster than the wear-resistant ceramic material, so the retention of ceramic particles and plate-like pieces decreases, and the impact of the solid fluid causes the ceramic material to wear out. The phenomenon of falling off often occurred.
It was particularly unsuitable for fluids with large particle diameters.

Therefore, the usage limit of this type of hose is not determined only by the wear life of the wear-resistant material;
This was caused by the state of wear of the rubber-like elastic body that holds the wear-resistant material and its holding power. In addition, to prevent the wear-resistant material from falling off, a method has been devised in which plate-like pieces are connected at intervals with flexible wires, but in this case, partial fall-off is prevented, but the rubber There is a high risk of a loose condition forming due to wear of the elastic body and flexible actuation of the hose.

As mentioned above, the concept of the prior art is that the wear-resistant material is granular or plate-like, but the rubber-like elastic body is exposed on the inner surface so that it comes into direct contact with the fluid flow, and they are basically the same. It can be considered a system. Note that in all of the conventional configurations described above, rubber-like elastic bodies are present on the friction surfaces of both fluids, and therefore, they cannot be practically used as transfer hoses for high-temperature fluids.

[The problem that the idea attempts to solve]

As mentioned above, the configuration of the prior art is such that a sintered wear-resistant material such as a ceramic material and a rubber-like elastic body with low heat resistance that elastically holds it are placed in an exposed manner on the fluid flow surface inside the hose. Since it is directly exposed to fluid flow friction, it is affected by both abrasion and heating effects.

Therefore, the inventors came up with a concept that eliminated rubber-like elastic bodies with low heat resistance, and avoided the planar arrangement of sintered wear-resistant materials such as ceramic materials, so that connecting members made of sintered wear-resistant materials could resist the abrasion effects of fluids. The aim is to solve the problem of suppressing the effects of heating and heating effects to the minimum possible extent, and to provide suitable flexibility, high pressure resistance, and heat resistance.

[Means to solve the problem]

To achieve the above objectives, the configuration of the hose is
Mainly composed of inorganic materials, sintered wear-resistant materials such as ceramic materials are used for the inner surface, and the planar structure has been modified to pursue combinations of three-dimensional structures that provide flexibility and means of combining them. It is something.

In other words, as a sintered wear-resistant material having a three-dimensional structure, a ring-shaped sintered wear-resistant material unit consisting of a large-diameter part and a small-diameter part is constructed, and the end of the large-diameter part and the end of the small-diameter part of the unit are The inner layer of the hose is formed by loosely fitting them together and connecting the required number of hoses. As a means of connecting the required number, the inner layer of the hose is connected by a heat-resistant synthetic resin connecting body from the loose fitting part where the large diameter and small diameter of the sintered wear-resistant material unit are fitted to the outer circumference of the unit. The hose consisting of the sintered wear-resistant material unit is connected and fixed to all the wear-resistant material units that form the Constitutes the inner layer.

The above-mentioned heat-resistant synthetic resin-based linkages include heat-resistant synthetic resins such as fluorine-based resins such as polytetrafluoroethylene, heat-resistant epoxy resins, polyphenylene oxide resins (PPO resins), silicone resins, and allyl-based resins. or a fiber-reinforced heat-resistant synthetic resin linkage obtained by reinforcing the above resin with inorganic fibers such as rock wool, glass wool, silica fiber, and ceramic fiber. Note that a resin with an appropriate heat resistance is selected depending on the usage conditions.

The above-mentioned rigid rings include inorganic rings such as glass and ceramic rings, composite rings of metal and inorganic materials, composite rings of metal and heat-resistant synthetic resin, wooden rings, metal rings, spiral wire rings, etc. A ring shape or a split ring obtained by cutting one part of the ring or the like is appropriately selected depending on the usage situation.

Next, the outside of the inner layer is covered and reinforced with a heat-resistant cloth, for example, an inorganic fiber cloth (fiber processed product of glass, rock, silica, ceramic, carbon, etc.), which is set at both ends of the covering reinforcement. The cap is integrally adhesively fixed to the inner layer of the hose using a heat-resistant synthetic resin bonded body (appropriately selected from the range of materials used for the connecting body), and between the caps,
A high-temperature wear-resistant hose is constructed by setting a flexible metal armor reinforcement in which a metal body such as a bellows pipe or wire braid coated with a steel bellows pipe or wire braid is welded and fixed. .

The internal space of the peak of the bellows tube may be filled with inorganic fibers such as rock wool, glass wool, silica floc, or ceramic floc.

[Effect]

This idea involves fitting an annular sintered wear-resistant material unit consisting of a large-diameter part and a small-diameter part into a three-dimensional loose-fitting body, and connecting a heat-resistant synthetic resin system from the fitting part to the outer periphery of the large-diameter part. In order to form an inner layer by holding the upper part of the heat-resistant synthetic resin connecting body with a rigid ring and burying the loose fitting part, a large number of wear-resistant material units are arranged three-dimensionally. Nevertheless, smooth integral bending operation as a hose can be obtained.

Furthermore, since the inner surface that is in direct contact with the inner layer in the fluid flow direction is only the annular sintered wear-resistant material, it exhibits wear resistance for a long period of time at high temperatures.
In addition, the inner layer is reinforced with heat-resistant cloth on the outside, so it has a heat insulating and reinforcing effect, and the outermost layer is reinforced with flexible metal armor such as steel bellows tubes and wire braid. Because of this setting, it has long-term high pressure resistance.

〔Example〕

Next, the configuration of this invention will be explained based on illustrative drawings.

Fig. 1 is a 1/2 sectional view showing an example of the high temperature wear-resistant hose of this invention, Fig. 2-A is a sectional view of the sintered wear-resistant material unit, and Fig. 2-B is a side view of the same. be.

In the figure, 1 is a sintered wear-resistant material unit, 1a is a large diameter part, 1b is a stepped part, 1c is a small diameter part, 2 is a heat-resistant synthetic resin connecting body, 3 is a rigid ring, 4 is a heat-resistant cloth, and 5 is a heat-resistant cloth. The cap, 6 is a heat-resistant synthetic resin joint that joins the inner layer, the cap, and the heat-resistant cloth, 7 is a flange, and 8 is a metal armor reinforcement.

The configuration of this embodiment is such that a required number of sintered wear-resistant material units 1 are arranged on a core body as shown in the figure, and the ends of the large-diameter portion 1a and the small-diameter portion 1c of each combination overlap. A heat-resistant synthetic resin connecting body 2 is used to connect and fix the area from the loose fitting part PP between the sections to the outer periphery of the large diameter section, and the upper part of the heat-resistant synthetic resin connecting body burying this loose fitting part is fixed with a rigid ring. 3 to form the inner layer IL of the hose. Next, the outside is covered and reinforced with a heat-resistant cloth 4, and a cap 5 is set at both ends of the covering reinforcement, and the cap is connected to the inner layer of the hose with a heat-resistant synthetic resin bonded body 6. They are fixed together with adhesive, and a flexible metal armor reinforcing member 8 is welded and fixed between the caps to form a high temperature abrasion resistant hose. In addition, when using this hose, it is preferable that the fluid flow direction be in the direction of the RD arrow shown in the figure.

[Effect of idea]

Since this device is constructed as explained above, it has excellent durability, has no fear that the inner surface of the hose will fall off like in the past, and maintains suitable heat resistance and abrasion resistance for a long period of time. A suitable bending operation like that of a rubber hose can be obtained for a long time. Furthermore, it exhibits suitable long-term response to external actions such as stress, vibration, displacement, and absorption.

[Brief description of the drawings]

Fig. 1 is a 1/2 sectional view showing an example of the high temperature wear-resistant hose of this invention, Fig. 2-A is a sectional view of the sintered wear-resistant material unit, and Fig. 2-B is a side view of the same. It is. 1 ...Sintered wear-resistant material unit, 1a...Large diameter part, 1c...Small diameter part, 2...Heat-resistant synthetic resin connected body, 3...Rigid ring, 4...Heat-resistant cloth,
5... Base, 6... Heat-resistant synthetic resin-based joined body, 8
...Metal armor reinforcement, IL...inner layer, PP...playing part.

Claims (1)

[Scope of utility model registration request] When constructing the inner layer of the hose by combining the required number of annular sintered wear-resistant material units consisting of a large diameter part and a small diameter part, the end of the large diameter part and the end of the small diameter part of the unit are assembled in a loosely fitted state, and connected and fixed from the loosely fitting part to the outer periphery of the large diameter part with a heat-resistant synthetic resin connecting body, and further, a heat-resistant synthetic resin connecting body embedding the loosely fitting part. The upper part is held by a rigid ring to form the inner layer of the hose made of a sintered wear-resistant material unit, the outside of which is covered with heat-resistant cloth, and the mouthpiece is bonded to heat-resistant synthetic resin at both ends of the outside. A high-temperature, abrasion-resistant hose that is integrally bonded to the inner layer of the body and has a flexible metal armor reinforcement between the caps.