JPH088392Y2 - Submarine laying protective tube for long body - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a protection pipe for a submarine laid long body that protects a long body such as a submarine cable, water pipe, or oil pipe laid on the seabed. Is.

[Prior Art] This type of conventional protective pipe for a long seabed laid is connected by two split surfaces along the pipe axial direction, and one end in the pipe axial direction has a larger outer diameter than the middle portion. Adjacent protective units using a protective unit pipe having a male joint and a female joint at the other end having an inner diameter larger than the outer diameter of the male joint and capable of fitting the male joint in a non-removable manner The structure was constructed by fitting a male joint and a female joint facing each other and sequentially connecting them.

Since such a protective tube is flexible at the connecting portion between the male joint and the female joint of the protective unit tube, there is an advantage that it can be attached and protected according to the bending of the elongated body.

However, a protection tube using a protection unit tube having such a male joint and a female joint is connected by fitting the female joint of the protection unit tube to be mounted later to the male joint of the protection unit tube that is mounted first. However, because of the mounting work, there is a problem that the mounting work cannot be performed unless the work is continuously performed from one side. Since work time on the seabed is restricted by the water depth, the work on the seabed must be replaced at a predetermined time, which causes a problem of poor workability.

As a protective pipe for a long seabed laid long body that can solve such a problem, a protective pipe of the type shown in FIG.
Types such as those shown in FIGS. (A) and (b) have been proposed.

A protective pipe for a long body installed in a seabed of the type shown in FIG. 4 is constructed by sequentially connecting protective unit pipes 1.
That is, the protective unit tube 1 has two split surfaces along the tube axis direction.
A male joint 1c, which is connected by a bolt 2 and a nut 3 at 1a and has an outer diameter larger than that of an intermediate pipe portion 1b, is provided at one end in the pipe axial direction, and the male joint 1c is fitted to the other end so as not to come out. It has a structure in which a female joint 1d that can be fitted is provided. The protective unit tube 1 is attached to a male joint 1c of the protective unit tube 1 previously attached to the outer periphery of an elongated body (not shown) using the split surface 1a, and a female joint of the protective unit tube 1 to be attached later. The protection unit pipe connection group 4 is formed by fitting 1d and connecting them sequentially.
The protection unit pipe connection group 4 on the left side in FIG. 4 is formed by connecting the protection unit pipes 1 from left to right. The protection unit pipe connection group 4 on the right side in FIG. 4 is formed by connecting the protection unit pipes 1 from right to left. That is, this connecting work is performed in the directions approaching each other from different positions. Therefore, it is possible to perform the work of mounting the protective unit tube 1 by sharing it in the longitudinal direction. In the left and right protection unit pipe connection groups 4, the facing male joints 1c are connected by a connection unit pipe 5 so as not to escape.

The connecting unit pipe 5 has inner flanges 5b at both ends of the pipe portion 5a, and a bolt 6 and a nut 7 with a split surface 5c along the pipe axial direction.
By connecting both male joints 1c into the connection unit pipe 5, adjacent protection unit pipe connection groups 4 are connected.

When the connecting unit pipes 5 having the female joints 5e at both ends of the pipe portion 5a are used in this way, when the adjacent protective unit pipe connecting groups 4 are mutually connected, even if the facing joints are the male joints 1c having the same polarity, there is no problem. Can be connected. Therefore, the mounting work shared in the longitudinal direction can be performed without any trouble.

Further, this connecting portion also has flexibility like the other connecting portions, and the male joint 1c is fitted into the female joint 5e to prevent the male joint 1c from escaping.

5 to 9 (a) and (b) of the type shown in FIG. 6 is a protection pipe for a long seabed laid by using the protection unit pipe 1 shown in FIG. The points forming the group 4 are the same as in FIG. In this embodiment, as the protective unit tube 1A at the end of the protective unit tube connecting group 4 on the left side in FIG. 5, a male joint 1c having a structure cut at the P portion as shown in FIG. 7 is used. As shown in Fig. 8, the protective unit pipe 1B at the end of the protective unit pipe connecting group 4 on the right side has a structure in which the female joint 1d is cut at the Q portion as shown in Fig. 8, and the straight end at the end of these protective unit pipes 1A, 1B is used. As shown in FIG. 9, the connecting unit pipe 5 for connecting the parts has a structure in which two pipe parts 5a having the same inner diameter are divided into two parts, and a slit surface 5c is provided with a flange 5d, and the flange 5d is provided with a long hole in the longitudinal direction. Use the one with 5f.

In this case, the protection unit tubes 1A and 1B at the ends of the left and right protection unit tube connection groups 4 are connected to each other with the straight end sides of the protection unit tubes 1A and 1B facing each other. Fit the connection unit tube 5 and each protection unit tube 1A, 1B
This is performed by inserting a bolt (not shown) into the connection hole 1f and the elongated hole 5f of the connection unit tube 5 and tightening the nut to connect.

[Problems to be Solved by the Invention] However, in the protection pipe for a long seabed laying body of the type shown in FIG. 4, the connection unit pipe 5 has female joints 5e at both ends thereof, and the protection unit pipe at the end is there. Because of the structure in which the male joint 1c of No. 1 is fitted and connected, the dimension L between the ends of the adjacent protective unit tube connection groups 4 does not match the dimension between the female joints 5e at both ends of this connection unit tube 5 for connection. There is a fatal problem that cannot be done.

On the other hand, the protective pipes for long submarine laying bodies of the type shown in FIGS. 5 to 9 (a) and (b) are three types of protective unit pipes 1 shown in FIGS. 6, 7, and 8. If 1A and 1B are not used, there is a problem that mutual connection between the ends of the protective unit tube connection group 4 cannot be achieved, and flexibility cannot be obtained at the connection part.

An object of the present invention is to provide a protective pipe for a long seabed laying body that can be connected in a flexible state without any problem even if the distance between the ends of adjacent protective unit pipe connecting groups varies. is there.

[Means for Solving the Problems] The structure of the present invention for achieving the above-mentioned object will be described. The present invention is connected at two split surfaces along the tube axis direction and at one end in the tube axis direction. Is a protective unit having a structure in which a male joint having an outer diameter larger than that of the middle pipe portion is provided, and at the other end, a female joint having an inner diameter larger than the outer diameter of the male joint and capable of fitting the male joint in a non-removable manner is provided. Pipes are mutually connected by fitting of the male joint and the female joint between adjacent protective unit pipes to form a protective unit pipe connecting group, and the protective unit pipe connecting group has a plurality of lines in the longitudinal direction. In a protective pipe for a long seabed laying body, the protective unit pipe connecting groups are arranged at different positions and face each other, and the joints of the facing unit pipes are fixedly connected to each other by connecting unit pipes, Connect the connecting unit pipes to the ends of It has a structure in which it has inner flanges for locking the joints of the mating ends, and is connected by two split surfaces along the pipe axial direction, and the inner diameter of the pipe part is the above-mentioned protection except for the inner flanges. It is characterized in that it is formed to be larger than the outer diameter of the joint at the opposite ends of the unit pipe connection group.

[Operation] As described above, as the connection unit pipe, the both ends of the pipe portion have inner flanges for locking the joints of the facing end portions of the protection unit pipe connection groups, respectively, and are divided into two along the pipe axial direction. Using a structure in which the inner surfaces of the pipe portions are formed larger than the outer diameters of the joints of the facing end portions of the protection unit pipe connection groups, excluding the inner flange, A joint at the end of the adjacent protective unit pipe connection group can be present at any position in the pipe portion, so that the variation in the distance between the ends of the adjacent protective unit pipe connection groups in the pipe portion is absorbed. be able to. Therefore, even if there is a variation in the distance between the ends of the adjacent protection unit tube connection groups, the connection can be performed without any trouble. Moreover, the connecting portion in this case is also flexible. In addition, if a connecting unit pipe is used whose inner diameter is larger than the outer diameter of the joint at the facing end of each protective unit pipe connecting group except for the inner flanges at both ends, the connecting unit pipe of the facing protective unit pipe connecting group Whether the end portion is a male joint or a female joint, one type of connection unit pipe can be used for connection.

[Embodiment] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

1 and 2 show a first embodiment of the present invention. The protective pipe for a long body installed in the seabed of the present embodiment is similar to that in FIG. 4 in that the protective unit pipes 1 having the same structure are used to form a protective unit pipe connecting group 4 from the left and right. In this embodiment,
The characteristic is that the connection between the facing male joints 1c of the protective unit tubes 1 at the ends of the left and right protective unit tube connection groups 4 is made by the connecting unit tube 5 having the structure shown in the figure. is there.

The connecting unit pipe 5 has a male joint 1c of the same polarity at both ends of the pipe portion 5a.
Has inner flanges 5b for locking the respective ones, and is connected by bolts 6 and nuts 7 at two split surfaces 5c along the pipe axial direction, and the inner diameter of the pipe portion 5a is the same except for the inner flange 5b. It is formed larger than the outer diameter of the male joint 1c of the same polarity. In addition,
5d is a connecting flange provided on the split surface 5c.

By housing the facing male joints 1c of the protection unit tubes 1 at the ends of the left and right protection unit tube connection groups 4 in the tube portion 5a of the connection unit tube 5 as shown, The ends of the unit tube connection group 4 are connected.

When connected in this manner, this connecting portion also has flexibility like the other connecting portions, and the male joint 1c comes into contact with the inner flange 5b to prevent the female joint 1c from coming out.

Moreover, according to such a connecting structure, it is possible to make the male joints 1c of the same polarity at the ends of the adjacent protective unit tube connecting groups 4 exist at any position in the tube portion 5a. It is possible to absorb the variation in the distance between the ends of the protective unit tube connection groups 4 adjacent to each other in 5a. Therefore, even if there is variation in the distance between the ends of the adjacent protection unit tube connection groups 4, the connection can be performed without any trouble.

FIG. 3 shows a second embodiment of the present invention.
In this embodiment, the protection unit pipe connection group 4 on the left side is formed by connecting the protection unit pipes 1 from right to left. The protection unit tube connection group 4 on the right side is formed by connecting the protection unit tubes 1 from left to right. That is, in this embodiment, the assembling is performed in the directions away from each other from the same position. These left and right protection unit pipe connection groups 4 connect the female joints 1d facing each other to the pipe portion 5a of the connection unit pipe 5.
Connections are made by inserting the female joints 1d into the inside and making the female joints 1d unable to escape with the respective inner collars 5b.

The adjacent protection unit pipe connection group 4 faces the male joint 1c and the female joint 1d, and connects them to the pipe portion 5a of the connection unit pipe 5.
It can also be connected by inserting it into. That is, in this case, the shared mounting work can be performed by advancing in the same direction.

That is, the protective tube for a long seabed laying body of the present invention can perform the work of mounting the protective unit tube 1 from various directions by sharing the work in the longitudinal direction. Therefore, one diver can carry out the mounting work in a place deep in the water, and can move to a shallow place in the depth of water when the predetermined time is reached. You can extend the work time in.

[Effects of the Invention] As described above, in the protective pipe for a long seabed laid according to the present invention, as connecting unit pipes, joints at opposite ends of each protective unit pipe connecting group are provided at both ends of the pipe portion. It has a structure in which it has an inner flange to be locked and is connected by two split surfaces along the axial direction of the pipe, and the inner diameter of the pipe part faces each of the protection unit pipe connection groups except for the inner flange. Since the one having the outer diameter larger than the outer diameter of the end joint is used, the end joint of the protective unit pipe connecting group can be present at any position in the pipe portion. It is possible to absorb the variation in the distance between the ends of the protection unit pipe connection groups adjacent to each other in the pipe portion. Therefore, even if there is a variation in the distance between the ends of the adjacent protection unit tube connection groups, the connection can be performed without any trouble. Moreover, the connecting portion in this case is also flexible.

Therefore, according to the present invention, there is provided a protective pipe for a long seabed laying body which can be connected in a flexible state without any trouble even if the distance between the ends of adjacent protective unit pipe connecting groups varies. be able to.

In addition, as in the present invention, when a connecting unit pipe is formed in which the inner diameter of the pipe portion is larger than the outer diameter of the joint at the facing end of each protection unit pipe connecting group except for the inner collars at both ends, the facing unit protective pipe is used. Whether the end portion of the unit pipe connection group is a male joint or a female joint, connection can be performed using one type of connection unit pipe.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a first embodiment of a protective pipe for a long seabed laid according to the present invention, FIG. 2 is a perspective view of a connecting unit pipe used in this embodiment, and FIG. 3 is a present invention. A partially cutaway side view of a second embodiment of a protective pipe for a long seabed laid according to the present invention, FIG. 4 is a partially longitudinal side view of an example of a conventional protective pipe for a long seabed laid long body, and FIG. 5 is a conventional view. Fig. 6, Fig. 7, Fig. 7 and Fig. 8 are vertical cross-sectional views of other examples of protective pipes for long seabeds, and three types of protection used in the protective pipes for long seabeds shown in Fig. 5. Fig. 9 (a) is a vertical cross-sectional view of a connecting unit pipe used in the protective pipe for a long body installed in the seabed of Fig. 5, and Fig. 9 (b) is a vertical cross-sectional view of the unit pipe.
It is a cross-sectional view of FIG. 1 ... Protective unit pipe, 1a ... Split surface, 1b ... Pipe part, 1c ... Male joint, 1d ... Female joint, 2 ... Bolt, 3 ... Nut, 4 ... Protective unit pipe connecting group, 5 ... Connection unit pipe, 5a ... Pipe section, 5b ... Inner collar, 6
… Bolts, 7… nuts.

Claims (1)

[Scope of utility model registration request] 1. A male joint having a larger outer diameter than that of an intermediate pipe portion is provided at one end in the pipe axial direction, the male joint being connected by two split surfaces along the pipe axial direction, and at the other end. A protection unit tube having a structure having a female joint having an inner diameter larger than the outer diameter and capable of fitting the male joint in a non-detachable manner is provided by fitting the male joint and the female joint between adjacent protective unit tubes. The protection unit tube connection groups are connected to each other to form a plurality of protection unit tube connection groups, and the protection unit tube connection groups are arranged so that their positions are different from each other in the longitudinal direction and their ends face each other. In a protective pipe for a submarine laying long body in which end joints are connected in a connection unit pipe so as not to be able to escape, the connection unit pipe is provided at both ends of the pipe portion, and the facing end portion of each protection unit pipe connection group is It has inner collars that lock the joints, and it is connected by two split surfaces along the pipe axis direction. Submarine laying, characterized in that the inner diameter of the pipe portion is formed larger than the outer diameter of the joint at the facing end portion of each protection unit pipe connecting group except for the inner flange. Protective tube for long body.