JPH018794Y2 - - Google Patents

Description

[Detailed Description of the Invention] a. Field of Industrial Application The present invention relates to an improvement of a binding material for cold insulation cladding.

b. Prior Art Conventionally, cryogenic fluid transport pipes using hard polyurethane foam as a cold insulation material have been used. This pipe had a structure shown, for example, in FIGS. 1A and 1B. In the figure, 1 is a cold storage tube, 2 is a cold insulation material made of hard polyurethane foam, 3 is a joint material, 4 is a conventional binding device, 5a is a moisture proofing agent, and 5b is a reinforcing plate. For cold storage, a cold insulation material 2, which is divided into two parts according to the outer shape of the cold storage tube 1, is attached using a joint material 3, and three pieces of binding material 4 are used per 1 m in the longitudinal direction to attach the cold insulation material 2 to the cold storage tube 1. was tied up.

When the cold insulation structure is a layered structure, a moisture-proofing agent 5a is coated on the cold insulation layer, and the outer layer is finished by covering with a reinforcing plate 5b, for example, an iron plate. Furthermore, in the case of a two-layer structure, after the first layer is constructed, the second layer is constructed, and then finished in the same manner as the one-layer structure described above.

c Problems to be solved by the invention The cold storage cladding pipe constructed in this way is such that when the cooling fluid passes through the cold storage pipe 1, the pipe is cooled, and the cold storage pipe 1
and the cold insulating material 2 each contract toward the center of the tube according to their linear expansion coefficients. At this time, the binding material 4 on the room temperature side does not shrink. As a result, the binding effect is lost.

In order to improve this problem, a binding member having the shape shown in FIG. 2 is used. That is, □-shaped rods 10 and 11 are provided at the ends 8 and 9 of the band members 6 and 7, and a plurality of springs 12 are bridged between the rods.
While applying tensile force to the spring 12,
Wrap it around and join the other end. At this time, the spring 12 expands while being loaded with force, and after binding, the contraction force of the spring 12 applies a binding force to the cold insulating material 2 via the band member.

In this manner, the spring 12 contracts in response to the contraction of the structure (hereinafter referred to as a structure) made up of the cold storage tube 1, the cold storage material 2, etc., and the binding material 4 maintains the binding state. However, the binding force in this bondage method is
If the structure expands more than expected and exceeds the elastic limit of the spring, the spring loses its retractive force and cannot effectively restrain the structure.

d. Means for Solving the Problems The present invention solves the above problems and provides a binding material that can closely follow changes in the external shape of a structure and reliably hold the structure. The gist is that in a bondage material in which a spring is interposed in the middle part of a band member for bondage, and after being wound around a tube body, both ends of the band member can be fixed.
A pair of U-shaped rods are interposed in the middle part of the band member, facing each other, and each U-shaped rod has a bent part at the end, and the U-shaped rods are stacked facing each other. ,
A spring is wrapped between the bent parts of each U-shaped rod,
This binding material for a cold insulation cladding tube is configured to compress a spring when binding.

Hereinafter, the binding material of the present invention will be explained with reference to the accompanying drawings.

FIG. 3 is a diagram showing an embodiment of the binding material of the present invention, 13a and 13b are band members for binding, 14
a and 14b are springs, and 15a and 15b are U-shaped rods. The U-shaped rods 15a, 15b have bent portions 16a, 16 with both ends bent outward or inward.
The U-shaped rods 15a, 15b are overlapped, and springs 14a, 14b are installed between the bent portions 16a, 16b. Further, the bottom portions of the U-shaped rods 15a, 15b are rotatably supported by hook portions 17a, 17b formed by bending the ends of the binding band members 13a, 13b. 18, the springs 14a and 14b are at the bent portion 1
These are diameter-reduced portions provided at both ends of the spring to prevent it from coming off from the springs 6a and 16b.

When binding a structure using the above-mentioned binding material, after winding the binding band members 13a and 13b around the outer circumference of the structure, each end is passed through the stopper 19, and the conventional tightening method is used. The ends of the binding band members 13a and 13b are pulled and bound using a device (not shown), and the springs 14a and 14b are appropriately compressed, and then the stopper 19 is deformed and fixed. At this time, the springs 14a and 14b are
Due to tightening, both ends are bent portions 16a and 16b.
are engaged and compressed and contracted in the directions of arrows A and B.

When the structure expands or contracts due to temperature changes, the springs 14a and 14b compress or expand depending on the amount of expansion or contraction, and maintain almost the same binding force as originally applied. can do.

The material and shape of the spring used as a member of the bonding material of the present invention will depend on the shape and material of the structure,
It can be selected as appropriate in consideration of the degree of expansion/contraction caused by temperature changes, etc. For example, the bondage band members 13a and 13b may be metal or non-metal belt materials that have the mechanical strength and shape required depending on the shape and material of the structure, the presence or absence of shrinkage, and the surrounding environment. A wire rod or the like can be used appropriately. Further, the number of springs can be increased depending on the required binding force, and the shape of the clamping tool is not limited to the U-shape, but can be made into various shapes as long as they have the same effect.

Generally, in the known example shown in FIG. 2 and the embodiment shown in FIG. 3, the elastic force of the spring is designed and used in anticipation of the usage situation of the structure, ie, the cold storage tube, cold storage machine, etc. However, if a force greater than the expected value is applied to the spring due to a design error or the structure expands more than expected, in the known example shown in Figure 2, there is a risk that the spring will stretch too much and lose its elasticity. be.

According to the present invention, since the elastic force of the spring against compression is utilized, there is no such fear. Therefore, there is no need to make the design safety factor higher than necessary.

e Effects of the invention The binding material of the invention can maintain a good binding force in response to the expansion and contraction of the bound object by utilizing the elastic force against the compression of the spring, and can reach the elastic limit of the spring by stretching. Since it cannot be exceeded,
Compared to the conventional method that uses spring extension,
It is possible to reliably hold a bound object that has a large amount of expansion and contraction without extremely increasing the design safety factor.

[Brief explanation of the drawing]

Figures 1A and B are views showing conventional binding materials used in cold insulation work, Figure 2 is a perspective view of conventional binding materials, and Figure 3 is a perspective view of an embodiment of the binding material of the present invention. It is a diagram. 13a, 13b... Band member for bondage, 14
a, 14b... Spring, 15a, 15b...
U-shaped rod, 16a, 16b...bending part, 17a,
17b...Latching part, 18...Diameter reducing part, 19...Stopper.

Claims (1)

[Scope of utility model registration request] A bonding material in which a spring is interposed in the middle part of a band member for bondage, and after being wound around a tube body, both ends of the band member can be fixed. The molded rods are interposed facing each other, and a bent part is provided at the end of each U-shaped rod.
A binding for cold insulation cladding pipes in which the respective U-shaped rods are stacked facing each other, a spring is wound between the bent portions of each U-shaped rod, and the spring is compressed and bound during binding. Material.