JP3085948U - Bend tube protection block - Google Patents

Abstract

(57) [Problem] To provide a bent pipe protection block that can be reduced in weight, cost can be suppressed, workability can be improved, and fine adjustment at the time of construction can be easily performed. SOLUTION: A pipe-bending-portion holding recess for providing a pin mounting hole 3b, 4a in an upper block 4 and a lower block 3 to enable connection using a connecting pin 8, and protecting a pipe bending portion 20 in the lower block 3. 3a, the upper block 4 and the lower block 3 are tapered, a projection 3d is provided on one side surface of the lower block 3, and an engagement recess 3e is provided on the other side.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a bent pipe protection block attached to a bent portion of a pipe to reinforce a force exerted by a fluid passing through a buried pipe applied to the bent portion of the pipe.

[0002]

[Prior art]

 Conventionally, when a pipe having a bent portion is buried, a force called a thrust force is generated at the bent portion due to a centrifugal force or an imbalance in fluid pressure at which the fluid in the pipe turns, and this force causes the pipe to be buried. Since the joints may be separated due to vibration or sliding, or the pipe may burst in severe cases, a structure was installed to reinforce the pipe and resist thrust force. Structures against this thrust force include concrete wrapping, which is cast with concrete to cover the bends, piles, sheet piles, and detachment prevention fittings, etc. Stands were often used. Structures for thrust force were often required in many places, and the amount of construction was large. However, the workability is poor due to the so-called cast-in-place, which is carried out using a formwork at the site, and the backfilling and opening of traffic cannot be carried out early because of curing and removal of the formwork. On the other hand, as shown in Registered New Model No. 3076844, a block that is divided into upper and lower parts to protect the bent pipe has been devised. However, there is a problem that the block is heavy, and workability and fine adjustment during construction are difficult. there were.

[0003]

[Problems to be solved by the invention]

 The problem to be solved by the present invention is to solve the conventional problems, to provide a bent pipe protection block that can reduce weight, reduce costs, improve workability, and facilitate fine adjustment during construction. Is to do.

[0004]

Means for Solving the Problems The configuration of the present invention which has solved the above problems is as follows: 1) A pipe embedded in a lower block having an upper surface provided with a concave portion for holding a tube bending portion penetrating right and left and an upper block. A connecting means for connecting the upper block and the lower block at a mating surface is provided so that a part of the bent portion can be covered, and the upper block and the lower block are arranged from the outside to the inside of the bent portion of the bent portion of the pipe to be protected. The lower block has a shape with a reduced width, a projection is provided on one of the left and right side surfaces of the lower block, and an engagement recess is provided on the other side to engage with the projection of another lower block, and multiple sets of connected upper and lower blocks are provided. A bent pipe protection block that is arranged to protect the bent part of the pipe 2) A connecting concave part for engaging a U-shaped connecting tool that is connected to another lower block is formed by a pipe bent part. The bent pipe protection block according to the above 1) provided in the holding recess 3) The weight of the upper block and the lower block is set to 50 kg or less, respectively. The bent pipe protection block of the above 1) or 2) 4) The upper block and the lower block Has a tapered shape in which the width decreases from the outside to the inside of the bend of the bent portion of the pipe to be protected, and the taper angle is 20 ° to 25 °. Bending tube protection block 5) A plurality of bending tube protection blocks according to any one of the above 1) to 4) are connected in accordance with the bending angle of the bending portion of the pipe so as to protect most of the bending portion of the pipe. Pipe protection block connected body 6) A box-shaped box block is provided with a space that opens upward on the inside, and a tube bending section that supports the bent part of the pipe embedded in the left and right portions of the box block below the top of the block. A bent block that has a concave part for holding parts, a lid block that covers the entire upper part of the box block, and is buried while the bent part of the pipe is held by the box block and the lid block to protect the bent part of the pipe. Protection block 7) The bent pipe protection block according to 6), wherein a part of the lower surface of the lid block is fitted into the inner space of the box block so that the lid block and the box block can be connected.

[0005]

In the present invention, a portion that covers a part of the bent portion of the pipe is formed by aligning the concave portion for holding the bent portion of the pipe of the lower block with the upper block, thereby protecting a portion of the bent portion of the pipe. To Further, the projection provided on one of the side surfaces of the lower block is engaged with the engagement recess of another lower block, and the projection of the other lower block is engaged with the engagement recess provided on the other side of the lower block. May be connected to each other. The upper block and the lower block are so shaped that the width decreases from the outside to the inside of the bend of the tube to be protected. A part that covers a part can be formed. For those provided with a connecting recess for engaging a U-shaped connecting tool that is connected to another lower block, insert both ends of the U-shaped bracket into the connecting recess of the connected lower block, Make the connection stronger. If the weight of the upper block and the lower block is less than 50 kg each, fine adjustments are made during construction by easily moving them manually. An upper block and a lower block having a tapered shape with a taper angle of 20 ° to 25 ° are a general bending angle of a bent portion of a pipe. The shape should be such that two to four moderately bent tube protection blocks can cope with 45 ° and 90 °. When a plurality of bent pipe protection blocks are connected to form a linked bent pipe protection block, the bent pipe protection blocks are connected in accordance with the bending angle of the bent part of the pipe to protect the bent part of the pipe. The box block and the lid block protect the bent part of the pipe by using two pipe bent parts supported by pipe bent part holding recesses provided on the left and right sides of the box block. Protect the pipe so that most of the bent part of the pipe is located inside the box block so as to cover the upper part. In the case where a part of the lower surface of the lid block is fitted into the inner space of the box block, the lid block is engaged with the box block so as to be pressed downward by the buried soil, and the lid is closed to the box block. Part of the lower surface is engaged with the box block so that the block does not shift.

[0006]

[Embodiment of the invention]

 The upper block and the lower block are connected by means of a pin mounting hole facing the mating surface, and the upper and lower sides of the connecting pin are inserted into the pin mounting holes respectively. Some of them are connected by winding them, and it is desirable that they can be connected securely by simple work and can be disconnected. Alternatively, the upper block and the lower block may be simply backfilled. Since the connecting pin receives the thrust force applied to the bent portion of the pipe as a shearing force, it is desirable that the connecting pin have sufficient strength. The number of connecting pins may be determined as needed.

[0007]

【Example】

 Each embodiment of the present invention will be specifically described with reference to the drawings. Example 1 (see FIGS. 1 to 7) In Example 1 shown in FIGS. 1 to 7, a connecting concave portion for engaging a U-shaped connecting member is provided in a tube bending portion holding concave portion, and an upper block and a lower portion are provided. This is an example of a bent tube protection block in which the weight of each block is 50 kg or less, the shape of the upper block and the lower block is tapered, and the taper angle is 20 ° to 25 °. It is an example of a plurality of linked bent pipe protection block linked bodies. FIG. 1 is an explanatory diagram of a bent tube protection block according to the first embodiment. FIG. 2 is a rear view of the bent pipe protection block according to the first embodiment. FIG. 3 is a sectional view of a lower block of the bent pipe protection block according to the first embodiment. 4 to 6 are explanatory views showing a state in which the bent pipe protection block and the linked bent pipe protection block of the first embodiment are installed. FIG. 7 is an explanatory view of the bent pipe protection block and the linked bent pipe protection block according to the first embodiment. In the figure, 1 is a linked body of bent pipe protection blocks, 2 is a bent pipe protection block, 3 is a lower block, 3a is a recess for holding a pipe bent portion, 3b is a pin mounting hole, 3c is a connection recess, and 3d is a projection. , 3e are engagement recesses, 3f and 3g are handle recesses, 4 is an upper block, 4a is a pin mounting hole, 4b and 4c are handle recesses, 6 is a U-shaped coupling tool, and 7 is mortar. A portion 8 is a connecting pin, and 20 is a bent portion of the pipe.

In the first embodiment, as shown in FIG. 1, first, a lower block 3 and an upper block 4 are prepared in advance. The lower block 3 is a horizontal plane whose upper and lower surfaces are parallel to each other, and whose left and right side surfaces are tapered so that the width decreases toward one side. Therefore, the upper surface of the lower block 3 has a trapezoidal shape. The angle between the left and right side surfaces of the lower block 3, that is, the taper angle is 22.5 °. Next, a notch is formed in the lower block 3 so as to penetrate left and right in a U-shape, and an upper portion of the U-shape is opened to the outside on the upper surface of the lower block 3 to form a tube bent portion holding concave portion 3a. The concave portion 3a for holding the tube bending portion is provided so as to form a straight groove. Next, pin mounting holes 3b for mounting the connecting pins 8 on the upper surface of the lower block 3 are provided at two positions before and after the tube bending portion holding concave portion 3a. Next, a groove-shaped coupling concave portion 3c having a predetermined size is provided in a part of the tube bent portion holding concave portion 3a. The connecting concave portion 3c has a dimensional shape that does not penetrate left and right. Next, a vertically long engaging recess 3e is provided on the left side surface of the lower block 3. The upper end of the engagement recess 3 e is opened upward on the upper surface of the lower block 3. Next, a projection 3d is provided on the right side surface of the lower block 3 so as to be inserted into the engagement recess 3e of another lower block 3 of the same shape. Next, as shown in FIGS. 1 to 3, a handle recess 3f is provided on the front surface of the lower block 3 and a handle recess 3g is provided on the back surface so that one person can easily lift with both hands or two people. .

Next, as in the lower block 3, an upper block 4 having a tapered trapezoidal upper and lower surface with a taper angle of 22.5 ° is provided. On the lower surface of the upper block 4, connecting pins 8 are provided at two positions facing the pin mounting holes 3 b provided on the upper surface of the lower block 3 when the lower surface of the upper block 4 is overlapped with the upper surface of the lower block 3. A pin mounting hole 4a is provided for insertion and mounting. Next, as shown in FIGS. 1 and 2, a recess 4b for handle is provided on the front surface of the upper block 4 and a recess 4c for handle is provided on the back surface so that one person can easily lift with both hands or two people. I do. In this way, the bent tube protection block 2 is constituted by the lower block 3, the upper block 4, and the connecting pins 8.

In the first embodiment, a plurality of bent tube protection blocks 2 are connected to form a bent tube protection block connected body 1 to protect a bent portion of a tube. First, the lower block 3 is first arranged at a position where the groove provided along the pipe path becomes a bent portion of the pipe. The lower block 3 can be adjacent to the lower block 3 so as to bend by the taper angle by making the left and right narrow ends of the taper shape have the same direction. As a result, the tube bent portion holding concave portion 3a is also connected so as to be bent. When the lower blocks 3 are connected, the protrusions 3d of one lower block 3 are inserted into the engaging recesses 3e of the lower block 3 serving as the other. In this way, if the bent portion of the pipe is 90 °, since the left and right side surfaces of one bent pipe protection block 2 are tapered at 22.5 °, four bent pipe protection blocks 2 are formed. Thus, a bent portion 3a for holding the bent portion of the pipe is formed to protect the bent portion of the 90 ° pipe (FIG. 4 (a)). Next, both ends of the U-shaped coupling tool 6 are inserted into adjacent end portions of the coupling concave portions 3c provided in each of the tube bent portion holding concave portions 3a connected as described above. The adjacent bent pipe protection blocks 2 are further connected (FIG. 4B). With this connecting member 6, the mounting direction of the projection 3d and the engaging recess 3e is firmly fixed, and the connection is made more reliably. In this manner, when the adjacent bent pipe protection blocks 2 are connected by the connecting tool 6, the connecting tools 6 attached to the three locations of the tube bent portion holding recess 3a are filled with mortar so that the mortar portion 7 is filled. It is formed (FIG. 4C). When filling the mortar, the filling height is determined based on the diameter of the bent portion of the pipe to be protected.

Next, the pipe bending portion 20 is arranged in the pipe bending portion holding concave portion 3a of the plurality of connected lower blocks 3 (FIGS. 5A and 7), and the pipe bending portion 20 is placed inside the pipe bending portion holding concave portion 3a. The mortar is filled (FIG. 5B). Next, the lower half of the lower block 3 is mounted by inserting the lower half of the connecting pin 8 into the pin mounting hole 3b provided on the upper surface, and the pin mounting hole 4a provided on the lower surface of the upper block 4 to the pin mounting hole 3b. The upper block 4 and the lower block 3 are connected by inserting the upper half protruding above the attached connecting pin 8 (FIG. 5B). Thus, the bent pipe protection block connected body 1 is formed, and the bent part 20 of the pipe is protected (FIG. 6). Next, the construction is completed by filling back the pipe grooves with soil.

In the bent pipe protection block 2 of the first embodiment, the pipe bent portion holding recess 3a is made relatively large, and is adjusted by mortar filling. In addition, by making the side surfaces of the upper block 4 and the lower block 3 tapered and making the taper angle 22.5 °, the number of blocks suitable for 45 ° and 90 °, which is a typical bent portion of the pipe, is improved. Corresponding. Therefore, the upper block 4 and the lower block 3 can cope with most of the variation of the bent portion of the pipe with one common shape. As a result, costs can be greatly reduced. Further, since the bent portion of the pipe is protected by the plurality of bent pipe protection blocks 2, the weight of one bent pipe protection block, one upper block 4 and one lower block 3 can be reduced. It is easy to make fine adjustments at the time, and it has excellent on-site response and workability. The bent pipe protection block 2 of the first embodiment may be used by transporting a pre-molded one to the site, which eliminates the need for cast-in-place of the concrete. It is very useful because it can be constructed with little effect on the environment. Further, in the first embodiment, the fluid flowing through the pipe at the bent portion of the pipe in the traveling direction is formed by integrating the bent portion of the pipe with the connected bent pipe protection block 1 and the bent pipe protection block 2 by mortar filling. And sufficient reinforcement against forces and vibrations due to cavitation and the like.

FIGS. 8 to 11 show another example of the bent pipe protection block and the linked body of the bent pipe protection block of the first embodiment. As shown in FIGS. 8 to 10, if the number of the bent pipe protection blocks 2 to be connected is changed to the bent pipe protection block connected body 1 according to different pipe diameters and bending angles, the construction can be performed with very high site responsiveness. It is very useful. In another example shown in FIG. 11, the upper block 4 and the lower block 3 are connected by the weight of the upper block 4 and the holding of the backfilled soil, without using the connecting pins. As described above, the connection between the upper block 4 and the lower block 3 may be performed by means other than the connection pin, or alternatively, a wire may be connected to the outer periphery of the upper block 4 and the lower block 3 by a metal fitting. .

Second Embodiment (see FIGS. 12 to 14) In a second embodiment shown in FIGS. 12 to 14, a box block is provided with a concave portion for holding a tube bent portion, a lid block for closing an upper portion of the box block is provided, and a lid block is provided. This is an example of a bent tube protection block in which a part of the lower surface is fitted into the inner space of the box block. 12 to 14 are explanatory diagrams of the bent tube protection block according to the second embodiment. In the figure, 10 is a bent tube protection block, 11 is a box block, 11a is a concave portion for holding a tube bent portion, 11b is an inner space, 12 is a lid block, and 12a is a fitting portion. In the bent tube protection block 10 according to the second embodiment, a box block 11 having a box shape is provided as an inner space 11b opening upward, and a U-shaped tube bending portion holding recess 11a opening upward at the top is formed as a box. A cover block 12 is provided on both left and right sides of the block 11 and is large enough to cover the upper surface of the box block 11, and is fitted on the lower surface of the cover block 12 so as to project downward and fit into the inner space 11b. A part 12a is provided. In the bent pipe protection block 10 according to the second embodiment, the pipe bent part holding recess 11a having a sufficient size for the bent part of the pipe supports two bent parts of the pipe. Can be supported regardless. This is because only the position supported by the tube bending portion holding concave portion 11a changes. If the bent portion of the pipe is arranged so as to be accommodated in the inner space 11b of the box block 11, and is supported by the concave portion 11a for holding the pipe bent portion, the soil is buried in the inner space 11b of the box block 11, The cover block 12 is attached to the box block 11 such that the fitting portion 12a provided on the lower surface of the cover block 12 is fitted into the inner space 11b. The inner space 11b may not be filled with soil. As described above, in the bent pipe protection block 10 according to the second embodiment, the bent portion of the pipe can be reinforced by a simple operation using the extremely lightweight box block 11 and lid block 12. Therefore, the operation can be made very efficient, and the bending tube protection block 10 can be reduced in cost.

[0015]

[Effect of the invention]

 According to the present invention, the weight can be reduced, the cost can be suppressed, the workability can be improved, and fine adjustment during construction can be easily performed. The one provided with a connecting concave portion for engaging a U-shaped connecting member for connecting another lower block is a bent pipe protecting block that can be connected more reliably. If the weight of the upper block and the lower block is less than 50 kg, it can be more excellent in on-site response and workability. When the upper block and the lower block have a tapered shape and a taper angle of 20 ° to 25 °, it is possible to achieve both good workability and labor and cost by appropriate division. When a plurality of bent pipe protection blocks are connected to form a linked bent pipe protection block, the bent portion of the pipe can be reliably protected. A box block and a lid block that protects a pipe bend can be protected by a simpler operation. In the case where a part of the lower surface of the lid block is fitted into the inner space of the box block, the lid block can be securely attached to the box block with a structure in which the cost is reduced.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a bent tube protection block according to a first embodiment.

FIG. 2 is a rear view of the bent pipe protection block according to the first embodiment.

FIG. 3 is a sectional view of a lower block of the bent pipe protection block according to the first embodiment.

FIG. 4 is an explanatory view showing a state in which a bent pipe protection block and a connected body of bent pipe protection blocks according to the first embodiment are installed.

FIG. 5 is an explanatory diagram showing a state in which the bent pipe protection block and the linked bent pipe protection block assembly of the first embodiment are installed.

FIG. 6 is an explanatory diagram showing a state in which the bent pipe protection block and the linked body of bent pipe protection blocks according to the first embodiment are installed.

FIG. 7 is an explanatory view of a bent pipe protection block and a linked body of bent pipe protection blocks according to the first embodiment.

FIG. 8 is an explanatory diagram of another example of the linked body of bent tube protection blocks according to the first embodiment.

FIG. 9 is an explanatory view of another example of the linked body of bent pipe protection blocks according to the first embodiment.

FIG. 10 is an explanatory view of another example of the linked bent pipe protection block according to the first embodiment.

FIG. 11 is an explanatory diagram of another example of the bent tube protection block of the first embodiment.

FIG. 12 is an explanatory diagram of a bent tube protection block according to a second embodiment.

FIG. 13 is an explanatory view of a bent tube protection block according to a second embodiment.

FIG. 14 is an explanatory view of a bent tube protection block according to a second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bent tube protection block connected body 2 Bent tube protection block 3 Lower block 3a Recessed portion for retaining tube bent portion 3b Pin mounting hole 3c Recessed portion for connection 3d Projection 3e Recessed portion for engagement 3f Recessed portion for handle 3g Recessed portion for handle 4 Upper block 4a Pin mounting hole 4b Handle concave portion 4c Handle concave portion 6 (U-shaped) connector 7 Mortar portion 8 Connecting pin 10 Bending tube protection block 11 Box block 11a Tube bending portion holding recess 11b Inner space 12 Lid block 12a insertion part 20 bent part of pipe

Claims (7)

[Utility model registration claims] 1. An upper block and a lower block, wherein a lower block and an upper block, each having a concave portion for holding a tube bending portion penetrating from side to side, are provided so as to cover a part of a bent portion of a tube to be embedded. The upper block and the lower block are shaped such that the width becomes smaller from the outside to the inside of the bend of the bent portion of the pipe to be protected, and the protrusion is formed on one of the left and right side surfaces of the lower block. A bent pipe protection block provided with an engagement recess for engaging with a projection of another lower block, and a plurality of coupled upper and lower blocks arranged to protect a bent portion of a pipe. 2. The bent tube protection block according to claim 1, wherein a connection concave portion for engaging a U-shaped connecting member connected to another lower block is provided in the tube bent portion holding concave portion. 3. The bent pipe protection block according to claim 1, wherein each of the upper block and the lower block weighs 50 kg or less. 4. The upper block and the lower block are tapered so that the width decreases from the outside to the inside of the bend of the bend of the tube to be protected, and the taper angle is 20 ° to 25 °. 4. The bent tube protection block according to any one of 1 to 3, above. 5. A bent pipe protection comprising connecting a plurality of bent pipe protection blocks according to any one of claims 1 to 4 according to a bending angle of a bent part of the pipe to protect most of the bent part of the pipe. Block connection. 6. A box-shaped box block which is a space whose inner side is open upward and has a tube-bent-portion holding recess for supporting a tube-bent portion embedded in left and right portions of the box block below the block upper end. A bent pipe protection block provided with a lid block that covers the entire upper part of the box block, and buried in a state where the bent part of the pipe is held by the box block and the lid block to protect the bent part of the pipe. 7. The bent tube protection block according to claim 6, wherein a part of the lower surface of the lid block is fitted into the inner space of the box block so that the lid block and the box block can be connected.