JPS61117331A - Coupling mechanism of split type corrosionproof cover - Google Patents

Abstract

PURPOSE:To simplify and ensure coupling of the flanges of a corrosionproof cover, by a method wherein a male type member and a female member, being located to the inner surface of the flange of the corrosion proof cover, are resiliently intercoupled, and a pin is extended through the male type and the female type member. CONSTITUTION:In the coupling mechanism of a corrosionproof cover 10, consisting of a pair of cover half bodies 10a and 10b with which the tide area and the splash area of a steel pipe 12 are covered, a male type member 20 is secured to the inner surface of a flange 18a of the one half body 10a, and a female member 22 to the inner surface of a flange 18b of the other cover half body 10b. The male type member 20 is resiliently engaged with the female type member 22 by means of gears 24 and 26, respectively, and a pin 35 is extended through the male type member 20 and the female type member 22. A gap between the steel pipe 12 and the corrosionproof cover 10 is filled with a filler for curing. This simplifies and ensures intercoupling of the flanges 18a and 18b of the corrosionproof cover 10 with the aid of the male type member 20, the female type member 22, and the pin 35.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a connection mechanism for a split anti-corrosion cover used to coat and protect existing steel pipes such as pier supports.

[Prior art]

It is known that steel pipes such as pier supports found in ports and harbors are subject to intensive corrosion in their tidal and splash areas due to the action of macro batteries. In order to prevent this corrosion, it has been conventional practice to cover the steel pipe with a corrosion-resistant cover such as F-R-P, and to inject and harden a filling material such as mortar or concrete between the steel pipe and the cover.

However, in the case of existing steel pipes, the cylindrical cover cannot be inserted into the steel pipes because concrete has been built upwards. For this reason, a structure is often used in which the cover is divided into a pair of half-holes, a flange extending in the longitudinal direction is formed on each end edge, and the flanges are connected to each other by facing each cover half-hole from the outside of the steel pipe. In addition, there are two types of flanges connecting means: one using bolts and the other using a holder that clamps the stacked flanges from the outside.

However, the former method requires a considerable amount of effort to tighten a large number of bolts on site, and the latter method has the disadvantage that it is difficult to obtain a predetermined flange clamping force when the anticorrosion cover becomes large.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and an object thereof is to provide a connection mechanism for a side plate anticorrosion cover that allows a worker to easily connect flanges on site.

[Summary of the invention]

In order to achieve the above object, the present invention provides a male member on the inner surface of one flange of the cover half, a male member on the inner surface of the other flange, and forms both flanges so that they can be elastically engaged. A pin is passed through the male member and the male member to prevent displacement of both members and flanges.

[Embodiments of the invention]

FIG. 1 shows an anti-corrosion cover 10 that employs the coupling mechanism of the present invention.

This anti-corrosion camera 10 is made of a corrosion-resistant material such as F-R-P, and as can be seen from FIG.
It is attached to the steel pipe 12 with the ob facing each other. The vertical dimension of each half cover 10a+10b is set so that the ebb and flow area and the splash area of the steel pipe 12 can be completely covered.

Further, hanging fittings 14 are connected to the upper inner surface of the cover halves toa and 10b, and each hanging fitting 14 is connected to a steel pipe 12.
By welding to, the anticorrosion cover 10 is supported in a predetermined position. Although not shown, a pedestal may be installed on the steel pipe 12 to support the lower end of the anti-corrosion cover 10. Conc IJ-) 16 is constructed above the steel pipe 12,
The whole area forms a pier.

As shown in FIG. 2, flanges 18a, 18b are provided at both ends of each half-cover 10a, 10b, and each flange 18a, 18b is bent outward once, and then bent in the direction toward which it approaches again. .

A male member 20 is fixed to the inner surface of the flange 18m, and a male member 22 is fixed to the inner surface of the flange 18b. Further, a plurality of teeth U are provided on the outside of the male member 20, and internal teeth 26 that engage with the teeth U are provided in the hole of the male member 22.
is engraved. These teeth U and the internal teeth 26 are provided at an angle, and have a shape that prevents them from falling out once the teeth are in occlusion.

Male member 20 and male member 22 are preferably made of a material having a certain strength and flexibility, such as glass fiber reinforced nylon 6.

A groove 30 is formed in the center of the male member 20, and a groove 30 is formed in the center of the male member 20.
0 is slightly deformed when it engages with the male member 22, thereby reducing the insertion force. On the other hand, a molding 32 is integrally formed on the outside of the male member 22 (on the right side in FIG. 2), and this molding 32 serves to cover the seam that occurs when the flanges 18a and 18b are joined.

Further, extension portions O and 34 are integrally formed on the steel pipe 12 side (left side in FIG. 2) of the male member 20 and the male member 22, respectively. The extensions 33, 34 are connected to the flange 18a and the male member 20. The fixing area between the flange 18b and the male member 22 is increased to increase the adhesion between the respective members.

A pin 35 passes through each flange 18a, 18b, male member 20, and male member 222, and this pin 35 prevents each flange 1sa, 18b from relative movement in the vertical direction. It is preferable to use a corrosion-resistant material such as F-R-P for the pin 35, and its diameter is approximately
The setting is made so that it can withstand the shearing force caused by the misalignment of 0a and 10b. If there is a risk that the pin 35 may fall out after being driven in, a claw 38 for preventing the pin from returning may be provided at the tip of the pin as shown in FIG.

Furthermore, holes for the pins 35 are pre-drilled in the flan 18a, 18b, the male member 20, and the male member 22 so that they communicate when the respective cover half-holes 10a, 10b are connected in their proper positions. I'll keep it.

In this embodiment, the male member 20 and the male member 22 are attached over the entire length of the flanges 18a and 18b in the vertical direction, but the anti-corrosion cover is small and covers both the flanges 1sa and 18b.
If a large force is not required to connect b, use 7 runs of male members with small vertical dimensions:) 18a, 18
It may be attached at two or three locations above and below b.

The anticorrosive cover 10 of this embodiment is constructed in the following order.

First, the steel pipe 12 is covered with the cover halves 10IL and 10b facing each other, and the flanges tsa and 18b of each other are covered.
Press to join the two. Next, cover half 10
Align both the upper and lower ends of m and 10b and drive each pin 35 into both flanges 18a and 18b.

Next, the vertical position of the anti-corrosion cover 10 is adjusted so as to completely cover the tidal and splash areas of the steel pipe 12, and then the hanging fitting 14 provided above the cover is welded to the steel pipe 12. Finally, a filler 36 (see FIG. 2) is injected between the anticorrosive cover 10 and the rim of the steel pipe and solidified. Although not shown, a predetermined annular seal is provided between the bottom of the anti-corrosion cover 10 and the steel pipe 12, so there is no risk of the filler 36 leaking.

If mortar concrete is used as the filler 36, it will expand after solidifying and try to separate the flanges 18a, 18b, but the teeth 24 of the male member 20 and the internal teeth 2b of the male member 22 prevent the flanges from separating. prevent. Further, when glass fiber reinforced nylon 6 is used for the male member 20 and the male member 22, it absorbs water and expands slightly, increasing the occlusal force between the teeth 24 and the internal teeth 26.

Even if both members 20 and 22 expand more than necessary, there is no risk of damage because the groove 30 of the male member 20 absorbs the excess expansion.

Furthermore, by integrally forming the molding 32 on the outside of the male member 22, the seam between the flanges 18a and 18b is covered, and the shape and dimensions of the flanges 113a and 18b, as well as the cover halves 10a and 10b, are changed. There is also the advantage that they can be made the same.

〔Effect of the invention〕

As described in the paper, the coupling mechanism of the present invention has the effect of reliably coupling both flanges of the split anti-corrosion cover without requiring bolt tightening or a holder.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the installation state of a split anti-corrosion cover employing the coupling mechanism of the present invention, and FIG. 2 is a sectional view taken along the line 1--2 in FIG. 10... Corrosion protection cover 10a, 10b/cover half
12... Steel pipe 18a, 18b... Flange 20
・・Male member 22・・Male member 24・・Teeth 26・
・Internal tooth 30・Groove O, 34・Extension part 35・・
pin

Claims (3)

[Claims] (1) In a connecting mechanism for a split anti-corrosion cover that is used to cover the tidal and splash areas of existing steel pipes from the outside and is composed of a pair of cover halves, the inner surface of the flange of one of the cover halves has a male shape. A split anti-corrosion cover connection characterized in that a female member is fixed to the inner surface of the other flange so that both flanges can be elastically engaged, and a pin is passed through the male member and the female member. mechanism. (2) The male member and the female member are provided with interlocking teeth to prevent them from falling out after both flanges are connected, and the male member is further provided with a groove extending in the vertical direction. The connection mechanism of the split anti-corrosion cover according to item (1). (3) The connecting mechanism for the split anti-corrosion cover according to claim (1), further comprising a molding that covers the female member or the abutting portion of both flanges.