JPS5922390Y2 - High pressure flexible hume pipe - Google Patents

Description

[Detailed description of the invention] This invention consists of two metallic annular bodies each having a hook-shaped cross section, with a reinforcing body serving as the main reinforcement being interposed at approximately % or less of the height of the filled rubber-like material. A high-pressure system in which a flexible composite bonded with a rubber-like material is connected to 6 reinforcing wire meshes of the Huum tube, maintaining a close bond for a long time and exhibiting excellent leakage prevention and good flexibility function. It relates to a flexible hume tube.

Conventionally, in piping, especially buried piping, water leakage and breakage accidents occur due to bending and shear stress caused by ground subsidence and crustal deformation such as earthquakes, which occur in humid pipes after burial. These are most frequently installed at tube stations, and pose considerable problems in terms of maintenance and management.

Therefore, as a safety measure, if subsidence is expected,
In some cases, the ground is strengthened by piling.

Normally, the joints at the ends of hume pipes are connected by fitting the ends together, but in this case, if ground subsidence occurs, the ends are likely to be damaged.

In addition, in order to strengthen defects at the ends of the hume tube, a ring-shaped body of a vulcanized rubber-like material and a cylindrical metal shaft are fitted and molded between the ends of the hume tube. There is.

However, since only secondary adhesion (mechanical adhesion) can be obtained between such a vulcanized rubbery substance and an inert inorganic substance such as a humic tube, strong adhesion cannot be expected.

With such an adhesive structure of a rubbery substance and a conchnaut rigid body, it is impossible to expect good leakage prevention function over a long period of time, and since the metal shaft is exposed, it will corrode and its durability will not be achieved. In addition, since the outer periphery of the rubber-like material is restrained by a metal shaft, sufficient flexibility cannot be obtained, so it cannot adequately respond to changes in the earth's crust, and cannot be expected to be guaranteed to prevent breakage. be.

The high-pressure flexible hume pipe of this invention eliminates the drawbacks of conventional pipes and has a structure that exhibits good flexibility and excellent leakage and breakage prevention functions even under relatively high pressure over a long period of time. .

In other words, the rubber-like substance is a flexible composite made of vulcanized adhesive between unvulcanized rubber and metal that can provide strong primary adhesion (chemical adhesion), and the adhesion between the outside and the hume tube is as follows: A cylindrical reinforced wire mesh container that is integrally joined when forming the hume tube, has a structure in which no tensile peeling force is applied to the bonded surface as the rigid hume tube and metal are bonded together, and is embedded in the hume tube material. By connecting the hook-shaped metal annular body, it is possible to secure the connection between the metal annular body and the Huum canal in an immovable fixed state for a long period of time, which can sufficiently cope with crustal movements.

In addition to strong adhesion, the rubber-like material has a reinforcing body at the bottom of the rubber-like material, which is approximately % or less of the height of the filled rubber material, to maintain pressure and provide sufficient flexibility on the outside. During crustal deformation, the movement of the hume tube is supported by the lower reinforcement and the metal plate, preventing buckling of the rubber-like material and, as mentioned above, keeping all joint surfaces in close contact for a long period of time. This made it possible to do so.

Next, aspects of the invention will be specifically described in detail based on illustrative drawings.

FIG. 1 is a partially longitudinal cross-sectional view showing the state of the joint between the flexible composite of the high-pressure flexible hume pipe of this invention and the reinforcing wire mesh container of the hume pipe.

FIG. 2 is an enlarged cross-sectional view showing an example of a reinforcing member in the rubber-like material filled in the flexible composite of the high-pressure flexible hume pipe of this invention.

In the figure, 1 is a humerous tube, showing the vicinity of its connection with the flexible composite, and 2 is a metal annular body with a hook-shaped cross section. and an inner plate 2b in the inner diameter direction, each having an outer plate width Wa and an inner plate width Wi, the inner plate width Wi being slightly smaller than the wall thickness of the hume tube 1, and embedded in the hume tube 1. Ru.

CM includes an unvulcanized substance of a rubber-like substance 3, which is an elastic polymeric substance, between the outer plate 2a and the inner plate 2b in the hook-shaped cross section of two opposing metal annular bodies having a hook-shaped cross section. It is a flexible composite that is coated, filled, and heat-cured and bonded. 3a is a filling rubber-like substance between the inner plates 2b, and 3b is a covering rubber-like substance that is coated and bonded on the outer plate 2a (Fig. 2). reference).

Height TR of the filling rubber material 3a of the flexible composite CM
That is, the filling rubber material 3a is formed to have the same thickness as the hume pipe 1 to be connected.

It should be noted that various setting methods can be considered for reinforcing the filling rubber-like substance 3a.

In other words, flexibility must be taken into consideration when setting the outward direction from the viewpoint of both flexibility and pressure resistance.

For example, when reinforcing with a 3-ply cord, the pitch of reinforcement in the outward direction is made coarser, and the pitch of reinforcement near the center and inward direction is gradually decreased. If supplementary reinforcement is required in the outward direction, it is preferable to set it to approximately % of TR or less, and to place emphasis on flexibility.

In other words, there is usually no need to provide reinforcement outside the height TR of the filled rubber material, but if reinforcement is provided, a supplementary degree of reinforcement is required to ensure sufficient flexibility. It should be kept at .

Therefore, in order to obtain sufficient flexibility, it is preferable to set the reinforcing body, which is the main reinforcement, at a position of approximately % to % or less of the height TR of the filled rubber-like material 3.

In particular, it is optimal to form the reinforcement of the required ply at a position from about y2TR to about %TR.

The reinforcement of the filled rubbery material 3a of this invention shown in the figure is
As shown in the figure, approximately % of the height TR of the filled rubbery material 3a
One layer of reinforcing body 4 is buried in the following position, but the type and number of layers of the reinforcing body, which is the main part of the reinforcement set to approximately %TR or less, are selected appropriately according to the usage conditions. Ru.

The reason for embedding the reinforcing body 4 in the lower part of the filled rubber-like material 3a in this way is that the influence of internal pressure is difficult to spread to the outside, so that good flexibility of the outer peripheral portion is always maintained.

This is also because it is possible to exhibit an excellent leakage prevention function between the inner plates 2b.

In addition, by embedding the reinforcing body 4 mainly in the inward direction, good flexibility can be obtained, but on the other hand, sudden bending fluctuations such as buckling do not occur, and there is no risk of damage to the end of the fume pipe 1. It also has the characteristic of being suitable for responding to ground movements.

The reinforcing body used in this invention is usually one or more layers of linear bodies such as organic fiber cords, steel cords, steel wires, etc. buried in a spiral shape, or steel rings perpendicular to the axis. It is reinforced by shifting in the direction.

In the case of a spiral shape, the layers are arranged at an angle slightly oblique to the direction perpendicular to the axis, and in the case of two or more layers, the directions of inclination are arranged in opposite directions alternately.

In some cases, the slopes are formed in a cross shape with a large degree of inclination.

For the reinforcing body to be buried, various materials are appropriately selected depending on the conditions of use.

In special cases, woven fabric or plastic rings can also be used.

However, it is preferable to arrange the cords and rings at right angles to the axis of the hume tube, or at an angle close to the right angle direction. may be used in combination.

The flexible composite body CM is integrally combined with the hume tube 1 during manufacture of the hume tube 1, but the one shown in FIG. Board 2
A fixing plate 5 is formed on the outside of b at a corresponding position to be connected to the cylindrical reinforcing wire mesh 6 which is embedded with the molding material of the hume tube 1, and the cylindrical reinforcing wire mesh which is the reinforcing material of the hume tube 1 is attached. 6
The body 6 is sandwiched between the fixing plate 5 and the holding plate 7, connected with bolts, and buried in a hume tube molding material to integrate the flexible composite body CM and the hume tube 1. It is.

This shows an example of connection, and the connection method is essentially fixed, and is not limited.

As explained above, the high-pressure flexible hume tube of this invention is made by connecting a flexible composite consisting of a metal annular body that has strong adhesion to a rubber-like substance with six reinforcing wire meshes for the hume tube. By fixing it integrally with the hume pipe and setting the reinforcing material at a lower position of about % or less of the height of the filling rubber material, it is possible to maintain pressure and have sufficient flexibility, so that the hume pipe can be maintained even during crustal movements. Rapid bending fluctuations caused by buckling are adjusted, pressure resistance and suitable flexibility are always maintained, and a strong connection between the metal annular body and the rubber material and between the metal annular body and the humid tube is maintained. In addition to exhibiting excellent leakage prevention function, it also has good resistance to ground movement.
It has a high degree of safety over a long period of time.

[Brief explanation of the drawing]

FIG. 1 is a front view showing an example of implementation of the high-pressure flexible humid pipe of this invention, showing a partial longitudinal cross-section of a joint part, and FIG.
The figure is an enlarged sectional view showing an example of a reinforcing portion of a flexible composite. DESCRIPTION OF SYMBOLS 1...Hume tube, 2...Metallic annular body with hook-shaped cross section, 2a...External plate, 2b...
...Inner plate, CM...Flexible composite, 3.
...Rubbery substance, 3a...Filled rubbery substance, 3b...Coating rubbery substance, TR...
・Height of filled rubber-like substance, 4...Reinforcement body, 5.
...Fixing plate, 6...6 reinforcing wire meshes.

Claims (1)

[Scope of utility model registration request] Between the outer plate 2a in the axial direction and the inner plate 2b in the inner radial direction of two opposing metal annular bodies 2 having hook-shaped cross sections, which are formed at opposing ends of the hump tube 1. , a covering rubber-like material 3b and a filling rubber-like material 3a are formed, respectively, and a reinforcing body serving as the main reinforcement is interposed at a position of about % or less of the height TR of the filling rubber-like material 3a, and the heat-curing adhesive is integrated. A flexible composite CM is provided, and the outer metal surfaces of the inner plates 2b on both sides of this flexible composite are connected to 6 cylindrical reinforcing wire meshes 6, and on the metal surfaces on both sides, A high-pressure flexible hume tube in which a flexible composite CM is integrally bonded to the end of a hume tube 1 in which 6 reinforcing wire meshes 6 are buried using a hume tube material during molding of the hume tube.