TW200422509A - Resin concrete tube joint - Google Patents

Abstract

This invention aims to maintain good waterproof effect and increase durability of the connection part of the cylinder joint 1 and the connection part of resin concrete tube 3. The solutions are: to parallel melt joint central line c of cylinder joint 1 of stainless steel to connection part 2 by punching from inner and outside 2' and 2"of connection part 2 in order to make inner and outside 2' and 2" of connection part 2 keep on the same plane with the inner and outside 1' and 1" of cylinder joint 1; to embed base part 1a of the joint 1 mentioned above with the resin concrete tube 3 by expanding the diameter of the front part 1b of the joint 1, which extends out from tube 3, and then to make the blade 1c of the front part 1b a resin concrete tube joint that is parallel to α angle slope of the back guiding face 4' of the waterproof ring of the back smaller diameter part 3" connected to the resin concrete tube 3 or is a bigger resin concrete tube joint.

Description

2004225 09 Π) 发明 Description of the invention [Technical field to which the invention belongs] The present invention relates to a pipe joint of a connection portion of a resin concrete reinforced concrete pipe or the like. [Prior art] Conventionally, a pipe joint of a reinforced concrete pipe produced from a resin concrete or the like is made of iron or stainless steel, and a longitudinal cross section shown in FIG. 2 (A) is rounded by welding on the outer surface of the welded joint portion. The arc-shaped bead is formed in a ring-shaped protrusion, and an annular groove is generated on the inner surface of the connecting portion. Intrusion into the groove causes corrosion in the welded portion, and cracks or corroded holes in the welded portion cause leakage. In addition, the arc-shaped bead in the longitudinal section enlarges the annular protruding area, and causes the problem of poor durability due to the occurrence of corrosion caused by groundwater and the invasion holes caused by corrosion (for example, Patent Document 1). ,2). Further, the tip end portion of the joint collar fitted with the water stop ring needs to be slightly enlarged in diameter at the tip end of the joint collar in order not to damage the ring by touching the ring (for example, Patent Documents 3 and 4). Therefore, the compression ratio of the water stop rubber ring is small, and it is difficult to make the water stop sufficient and safe. However, there is a drawback that it is easy to cause water leakage or insufficient water stop. In particular, obstacles may occur in the curved embedded portion of the resin-reinforced concrete pipe. [Patent Document 1] Japanese Patent Publication No. 61-617 [Patent Document 2] Japanese Patent Application Laid-Open No. 4-2 1 3 693 (2) 2004225 09 [Patent Document 3] Japanese New Publication No. 2606 8 2 5 (No. (Figure 2) [Patent Document 4] Japanese New Publication No. 3 07 7 5 73 (Figure 2) [Summary of the Invention] (Problems to be Solved by the Invention)

The purpose of the present invention is to compact a welded connection part parallel to the center line of a cylindrical joint (collar) produced by iron or stainless steel to strengthen the strength of the connection part, prevent corrosion and prevent water leakage, and is suitable for Collar for bending buried resin concrete pipes. (Means for solving problems)

In order to achieve the above object, the joint of a resin concrete pipe according to the first invention of the present invention is characterized in that a welded connection portion parallel to a center line of a cylindrical joint made of iron or stainless steel is punched from the inside and outside, so that The inner and outer surfaces of the connecting portion are formed on the same surface as the inner and outer surfaces of the cylindrical joint. The base of the joint is fitted into a resin concrete pipe, the leading end of the joint protruding from the pipe is enlarged in diameter, and the leading end is enlarged. The inclination angle of the rear end guide surface of the water stop ring fitted with the small diameter section of the rear end portion of the connected resin concrete pipe is parallel or wide-angled. The joint of the resin concrete pipe of the second invention, the outer diameter of the small diameter section of the rear end portion of the resin concrete pipe is almost the middle diameter of the inside and outside diameter of the concrete pipe body, and the outer diameter of the water ring is the same as the outside diameter of the pipe body Almost equal 'A singular or plural ring groove is formed in front of the aforementioned guide surface of the ring. The joint of a resin concrete pipe according to the third invention, the -5- (3) (3) 2004225 09 fusion welding is a plasma welding. [Embodiment] To connect a resin concrete pipe 3 (for example, a reinforced concrete pipe with an outer diameter of 2 60 mm and an inner diameter of 200 mm), a cylindrical joint 1 made of iron or stainless steel is used (Fig. 1) . The joint 1 has a welded connection 2 parallel to the center line c. The joint 1 is formed by bending a flat plate into a cylindrical shape by a forming machine. The end faces 1 d and 1 d facing each other are plasma welded from outside to strengthen the weld. Mechanical strength of connection 2. As shown in FIG. 2 (A), the fusion-bonded portion 2 has a circular arc-shaped annular protrusion 2b in a longitudinal section and an annular groove 2c in the inner surface after removing the solvent from the welded steel 2a. Here, as shown in FIG. 3 (A) (B), the above-mentioned welded connection portion 2 is formed by pressing the inner and outer surfaces Γ and 1 π in a facing direction to press the punch roll 6 of the punch press 5 on the cylinder 7 and the load. As shown in FIG. 2 (B), the ring-shaped protrusion 2b of the steel material 2a is welded between the fittings 10 between the facing end faces and 1d to form the outer face 1 of the joint 1 '' On the same surface, the annular groove 2c is filled with the pressure-welded steel material 2a, and the end faces 1 d, 1 d facing the joint 1 are integrated to form the inner and outer surfaces 2 ′ of the steel 2 a. , 2 ”and the inner and outer surfaces 1 ′, 1” of the joint 1 form the same surface so that the annular groove 2 c is eliminated. On the outer surface 1 "of the base portion 1 a of the cylindrical joint 1 thus formed, a ring-shaped groove 1 e, 1 e as shown in FIG.

The part 1a is fitted and fixed to the outer periphery of the concrete pipe 3, and is held on a rotary forming frame of the resin concrete pipe 3 (Fig. 4). Further, the tip end portion 丨 b of the joint 1 is protruded from the concrete pipe 3 toward the rear ', and the tip end portion 1b is enlarged in diameter by the forming machine.

The edge edge surface 1 c of the tip end portion 1 b is formed at the rear of the small-diameter section 3 ″ of the rear end portion of the connection concrete pipe 3 connected to the front end of the concrete pipe 3. The inclination angle α of the end guide surface 4 ′ is parallel or large (FIG. 5). The above guide surface 4 ′ is inclined toward the rear at an angle α with the common center line c of the two concrete pipes 3 and 3. Plane 1 c is the same plane (parallel) or wide-angle α as the inclination angle α, (Figure 5). That is, α = α ', or a' > a °

The outer diameter of the small-diameter section 3 ″ is almost the middle diameter of the inner and outer diameters of the main body 3 ′ of the concrete pipes 3, 3. That is, the thickness of the small-diameter section 3 ″ is almost 1/2 of the thickness of the pipe main body 3 ′. The outer diameter of the water stop ring 4 is formed to be almost equal to the outer diameter of the pipe body 3 ·. The rear end of the ring 4 has the guide surface 4 ′, and one or two ring grooves 4 ”, 4” are formed in the front portion. From the state shown in FIG. 5, the joint 1 is used. In the state shown in FIG. 6, the ring grooves 4 ″, 4 ”are pressed under pressure, and the inner surface 1 · of the joint 1 is tightly closed to stop water. The punching machine 5 moves the punching roller 6 at the lower end of the hydraulic cylinder 7 suspended reciprocatingly by the horizontal cylinder 9 along the horizontal guide and guide 8 provided in the frame as shown in FIG. 3 (a). Supported on the rotating frame 6 ·, parallel to the guide 8, the load fitting 10 is projected and fixed on the frame of the machine 7- (5) 200422509 directly under the punch roller 6, and the cylindrical joint 1 is welded and connected. The part 2 is clamped between the roller 6 and the load-carrying accessory 10, and can be clamped between the roller 6 and the load-carrying accessory 10 by the hydraulic cylinder 7. And 11 in the figure is a water-swellable rubber. (Effect of the invention)

The present invention is based on the above-mentioned structure. For the curved connection of the resin concrete pipe, there is no need to worry about the water-proof rubber to prevent the guide surface from being damaged due to the cutting of the leading edge of the cylindrical joint. Because it is crimped to a relatively thick water stop ring and can be tightly connected to the above-mentioned groove of the water stop ring, the water stop can be performed sufficiently and safely, and because the welded steel of the welded connection part of the cylindrical joint is It is tightly integrated with the stainless steel joint, and can eliminate the annular groove between the welded steel and the inner surface of the joint to form the same surface as the inner surface. Therefore, it is on the inner surface of the welded steel and the joint. There is no sewage ditch between the surfaces, so that the welded steel is compacted without pores caused by poor welding, and because the contact area with sewage is small, it is possible to prevent water leakage caused by corrosion of the welded steel and improve the above. The effect of durability of the joint of the concrete pipe. [Brief description of the drawings] [Figure 1] A perspective view showing a cylindrical joint of the present case. [Fig. 2] (6) 200422509 (A) The figure is an enlarged longitudinal cross-sectional view of a welded joint before punching. (B) is an enlarged longitudinal cross-sectional view of a welded joint after punching. [Figure 3] (A) is a side perspective view of a punching machine. (B) is a front view of the press.

[Fig. 4] Fig. 1 from the state where the cylindrical joint is fitted to the resin concrete pipe. [Fig. 5] A longitudinal sectional view of the state before the connection of the concrete pipe [Fig. 6]

A longitudinal sectional view of the connected state of the tubes. [Illustration of number] c Centerline 1 Cylindrical joint Γ Outside 1 ”Inner surface la Base lb Tip end -9- (7) 2004225 09 1 c End edge cutting surface Id end surface 1 e Ring groove 2 Welding connection 2 'outside 2 "inside 2a welded steel

2b circular arc-shaped protrusion in longitudinal section 2c annular groove 3 concrete pipe 3 resin concrete pipe 3 ’main body 3” small diameter section at rear end 4 stop ring 4 ’rear end guide surface

4 ”ring groove 5 punch press 6 punch roll 6’ swing frame 7 hydraulic cylinder 8 horizontal guide 9 horizontal cylinder 1 〇 bearing accessories -10-

Claims (1)

(1) 2004225 09 Pick up and apply for patent scope 1. A joint of resin concrete pipe 'characterized by: a fused connection part punch which is parallel to the center line of a cylindrical joint produced by iron or stainless steel from the inside and outside' The inner and outer surfaces of the connecting portion are formed on the same surface as the inner and outer surfaces of the cylindrical joint, The base of the joint is fitted with a resin concrete pipe, the leading end of the joint protruding from the pipe is enlarged in diameter, and the edge edge surface of the leading end forms a rear end of the resin concrete pipe connected to the pipe. The inclination angle of the rear end guide surface of the small-diameter section fitted water stop ring is parallel or wide-angle. 2. If the joint of the resin concrete pipe in item 1 of the patent application scope, The outer diameter of the small-diameter section of the rear end portion of the resin concrete pipe is almost the middle diameter of the inner and outer diameters of the concrete pipe body, and the outer diameter of the water ring is almost equal to the outer diameter of the pipe body. The front part of the guide surface forms a singular or plural ring groove. 3. The joint of a resin concrete pipe according to item 1 or 2 of the scope of application for a patent, wherein the welding of the above-mentioned welding connection portion is plasma welding. -11-