JPH0630298U - Fume pipe joint structure for propulsion - Google Patents

Abstract

(57) [Summary] [Purpose] A sealing material made of a water-swellable substance is swiftly and surely expanded to prevent water leakage. [Structure] On the outer circumference of one end 11 of the concrete pipe 1, a collar 3 having a sealing material 4 formed of a water-expandable substance and an anchor streak 2 fixed to the inner peripheral surface is embedded, and the other end of the concrete pipe 1 is embedded. A joint portion 13 having a plurality of concave grooves 14 is provided on the outer periphery of the pipe end portion 12, and the concave grooves 14 and the collar 3 are provided.
A rubber ring 7 for waterproofing is mounted between the inner peripheral surface of the sealing material 4 and the collar 3 of the sealing material 4, and an exposed portion 41 where the base material of the sealing material 4 is exposed is formed on a part of the bonding surface 5 of the sealing material 4. Provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a joint structure for a propulsion fume pipe, and more particularly to a joint structure for a propulsion fume pipe that ensures expansion of a sealing material and a water blocking effect.

[0002]

[Prior art]

 In the conventional joint structure for propulsion fume pipes, there is one in which a steel rod and a water-expandable substance material are provided on the embedded side of a steel plate collar when a steel plate color is integrally formed at the connection end of a concrete pipe (for example, See Japanese Utility Model Publication No. 61-615).

[0003]

[Problems to be solved by the device]

 However, in the conventional joint structure, the joint between the steel plate collar and concrete peels off due to vibration during transportation, direction correction work during propulsion work, ground subsidence, etc., resulting in water leakage from the joint. There is a point.

Further, since the water-swellable substance material is adhered to the inner peripheral surface of the steel plate collar with an adhesive, when the water-swellable substance material is peeled from the steel plate collar, the water-swellable substance material is removed from the joint between the steel plate collar and the concrete. The invading water is repelled by the adhesive and does not expand the water-swellable substance material, so that the function of the water-swellable substance material is not exerted, and as a result, there is a problem that water leakage cannot be prevented.

Therefore, an object of the present invention is to provide a joint structure for a propulsion fume pipe in which the sealing material made of a water-expandable substance can be swiftly and surely expanded to prevent water leakage.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the joint structure of the propulsion fume pipe of the present invention is such that the outer peripheral surface of one end of the concrete pipe has a seal material and an anchor bar formed of a water-expandable material on the inner peripheral surface. And the collar with the attached pipes are embedded, and a joint with a plurality of grooves is provided on the outer circumference of the other end of the concrete pipe, and a rubber ring for waterproofing is provided between the grooves and the inner peripheral surface of the collar. It is characterized in that an exposed portion where the base material of the sealing material is exposed is provided on a part of the mounting surface of the sealing material to the collar.

[0007]

[Action]

 As shown in Fig. 4, Fig. 8 and Fig. 10, when the joint between the collar and the concrete pipe separates and the water A that causes water leakage enters, the water A will separate from the collar and the sealing material. To reach the exposed portion of the sealing material. Thereupon, the water A is immediately absorbed from the exposed portion, and the sealing material made of a water-swelling material immediately expands and rises, and adheres to the inner circumference of the collar to stop water.

[0008]

【Example】

 Examples will be described with reference to the drawings. As shown in FIGS. 1 and 2, when the collar 3 is integrally fixed to the outer periphery of the one end 11 of the concrete pipe 1 by centrifugal molding, for example, a ring-shaped anchor is provided on the inner periphery 31 of the collar 3. Muscle 2 is welded. A sealing material 4 is adhered to the inner circumference 31 of the collar 3 with an adhesive 5.

The sealing material 4 is preliminarily molded in a predetermined shape and size from a rubber-based water-swellable substance containing superabsorbent polymer particles that expand when containing water. Then, both ends of the collar 3 are adhered to the collar 3 with an adhesive 5 so as not to be peeled off from the collar 3 during pipe making, and a central portion is an exposed portion 41 where the base material is exposed. A plurality of exposed portions 41 may be provided as shown in FIG. Note that the anchor streak 2 may be arranged on either side of the sealing material 4.

The exposed portion 41 may be formed in a concave shape or an uneven shape in order to increase a contact area with water and improve water retention. For example, FIG. 5 shows that one concave exposed portion 41 is provided, and FIG. 6 shows that the multiple exposed portions 41 are provided.

Further, FIG. 11 shows an uneven exposed portion 41 having a serrated surface, and FIG. 12 shows an uneven exposed portion 41 having a corrugated surface.

Further, as shown in FIG. 7, the sealing material 4 is divided into 4a and 4a along the circumferential direction of the concrete pipe 1, and a fixed gap 42 is provided with an adhesive tape 6 adhered to the bottom surface. The inner surface of 42 may be formed in the exposed portion 41.

Further, when the collar 3 is integrally fixed to the fume tube 1, the anchor bar 2 and the anchor bar 2 are separately provided in the collar 3 so that the seal member 4 is not moved and is arranged at a predetermined position. After the steel rod 8 is welded, the exposed portion 41 of the sealing material 4 may be arranged so as to surround the steel rod 8 and adhered to the inner circumference 31 of the collar 3 (FIG. 9). .

On the other hand, a joint portion 13 having an outer diameter smaller than the inner diameter of the collar 3 is formed on the outer circumference of the other pipe end portion 12 of the concrete pipe 1, and the joint portion 13 has a direction correction during propulsion work. It is possible to make the entire pipeline flexible so that it can absorb the bending stress generated by the ground subsidence, etc., and to maintain the clearance between the joint 13 and the collar 3 evenly to achieve a more complete waterproofing effect. In order to enable this, a plurality of grooves 14 are provided, and the rubber ring 7 is mounted between the grooves 14 and the collar 3.

The rubber ring 7 may be solid or hollow, and when a plurality of rubber rings 7 are used, those having different hardness depending on the arrangement position may be used.

If the collar 3 is fixed to the one end 11 of the concrete pipe 1 by centrifugal molding, processing work can be reduced and simplified, and the product cost can be reduced.

[0017]

[Effect of device]

 Since the present invention is configured as described above, it has the following effects. If the joint between the collar and the concrete pipe peels off and water that causes water leakage enters, the water will reach the exposed part of the sealant through the separated part between the collar and the sealant, and from that exposed part. Since it is immediately absorbed, the sealant, which is a water-swellable substance, immediately expands and rises, and adheres to the inner circumference of the collar to ensure water stoppage.

Further, since a plurality of water-stop rubber rings are arranged at the connection portion of the other pipe end portion, it is possible to absorb the bending stress generated by the direction correction and ground subsidence during the propulsion work. Flexibility is given to the entire pipe line, and the clearance between the joint and the collar is maintained evenly, achieving a complete waterproofing effect.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a sealing material portion in FIG.

FIG. 3 is an enlarged cross-sectional view showing another embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a peeled state in FIG.

FIG. 5 is a cross-sectional view of a sealing material portion provided with a concave exposed portion.

FIG. 6 is a sectional view showing another embodiment of the same.

FIG. 7 is a cross-sectional view of a case where an exposed portion is formed with divided sealing materials.

FIG. 8 is a cross-sectional view showing a peeled state in FIG.

FIG. 9 is a cross-sectional view when an exposed portion of a sealing material is formed at a steel rod position.

10 is a cross-sectional view showing a peeled state in FIG.

FIG. 11 is a cross-sectional view of a sealing material portion provided with an uneven exposed portion.

FIG. 12 is a sectional view showing another embodiment of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concrete pipe 2 Anchor streak 3 Color 4 Sealing material 41 Exposed part 5 Adhesive 7 Rubber ring for waterproofing 11 One pipe end 12 The other pipe end 13 Joining part 14 Recessed groove

Claims (1)

[Scope of utility model registration request] 1. A collar having a seal material formed of a water-expandable substance and an anchor bar attached to the inner peripheral surface is embedded on the outer periphery of one end of the concrete pipe, and the other pipe end of the concrete pipe is embedded. A joint portion having a plurality of recessed grooves is provided on the outer periphery, and a water-stop rubber ring is mounted between the recessed grooves and the inner peripheral surface of the collar, and one of the mounting surfaces of the seal material to the collar is formed. A joint structure for a propulsion fume pipe, characterized in that an exposed portion where the base material of the sealing material is exposed is provided in the portion.