JPH0740223A - Removed pipe supporting device for wire saw and water supply suspensionless type pipe cutting device using the same - Google Patents

Abstract

PURPOSE:To certainly sectionally cut a large diametrical water pipe at two points by using an endless wire saw and certainly remove a cut and removed pipe. CONSTITUTION:An endless wire saw 25 used for cutting is driven by a driving motor 23 fixed on a second lifting shaft 19, guided by a moving pulley and certainly cuts a water pipe 2 at two points sectionally along a cutting surface 11 set with a required draft and constantly facilitates extraction of a cut removed pipe 2a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a removal pipe supporting device for a wire saw that cuts various pipes, and particularly to branching a large-diameter water pipe such as a main pipe of water supply without interrupting the water supply. The present invention relates to a pipe cutting device that is suitable for pipe cutting work, which is generally called uninterrupted water work, for performing piping work.

[0002]

2. Description of the Related Art Conventionally, as a device for branching a water pipe with uninterrupted water, around a branch portion such as a water main that requires branching,
A watertight first compartment is provided through a partition wall (valve) that can be opened and closed, and in this first compartment, a hole is drilled in the pipe wall of the water pipe or a pipe is cut off. .

During the drilling process, the first compartment is filled with water, and high pressure is applied to the compartment, but the compartment has a high pressure resistant structure. After the drilling work, the processing tool and the cutting tube are evacuated to the second compartment partitioned by the compartment partition.

The second compartment also has a high pressure resistant structure, and when the processing tool and the cutting tube are retracted, the compartment partition is closed and the first compartment is closed.
And the second compartment is divided. After that, in the second compartment, the processing tool and the cutting pipe are removed, the branch pipe is connected thereto, and the main partition and the branch pipe communicate with each other by opening the partition wall.

[0005]

A conventional cutting device for cutting a mains of a water supply into a slice is disclosed in, for example, Japanese Utility Model Laid-Open No. 63-20101.
It is disclosed in Japanese Patent No. 3 publication. This is a pipe ring cutting device using a chain saw or band saw, and the frame itself equipped with pulleys and rollers for hanging an endless saw such as a chain or band is cut along with the progress of cutting. It is a mechanism that moves relatively between barrel tubes.

However, when using these mechanisms, the main pipe of the water supply is cut into two parts in close proximity to remove the cut part, the cut end of the cutting part is narrow in the direction of removing the removal pipe. In that case, the removal pipe cannot be removed, which causes a serious problem that the construction cannot be continued. Further, since the chain and the frame itself are heavy, a considerable amount of pulling driving force required for removing the removal pipe was required.

In particular, the present applicant has previously filed as Japanese Patent Application No. 5-154504 a pipe cutting device using a diamond wire saw having no cutting direction in the cutting blade. Although it has advantages such as weight reduction, it has a surface which cannot always be cut at a right angle even if the pulley around which the wire saw is moved at a right angle to the pipe.

According to the present invention, a wire saw is used to surely slice a large main pipe such as water supply at an intended position, and the cutting and removing pipe can be easily and surely removed. The purpose is to solve the problem.

[0009]

DISCLOSURE OF THE INVENTION A removal pipe support device for a wire saw according to the present invention is a removal pipe support body which is a saddle-shaped support body and is attached so as to sandwich the pipe from a plurality of directions. Rails extend to each end, and when each support is joined, each end rail forms a rail that is continuous in the vertical direction, and a movable pulley that can move is attached to this rail. It is characterized in that (claim 1).

The uninterrupted water pipe cutting apparatus of the present invention comprises a compartment for watertightly surrounding a pipe to be cut, and a required cut surface to be cut at two locations on both end faces in the axial direction of the removal pipe support. A pulley guide means provided with a movable pulley, a drive motor for locating and driving the drive pulleys on the same plane as the required cutting surface requiring cutting at the two locations, and the required cutting at the two locations. The fixed pulleys are arranged in the same plane as the surface and are provided in a required number of places on the substrate, and the drive pulley, the fixed pulley, and the movable pulley which are arranged in the same plane as the two required cut surfaces are wound around. An endless wire saw is provided (Claim 4).

[0011]

[Operation] The cutting point of the pipe is defined by the rails at both ends of the removal pipe support, and the moving pulley moves on this rail while guiding the wire saw, so that the pipe is cut into the desired shape. To be done. Here, when the wire saw moves in one direction, it tries to cut everything on the line, but since the moving pulley moves without resistance, it is not cut (claim 1).

The endless wire saw is driven by a drive motor and guided by a moving pulley in a compartment that encloses the pipe in a watertight manner, and ensures that the removal pipe can be easily removed along the required cutting surface. Cut into slices. Therefore, it is possible to work with peace of mind even if the compartment cannot be seen when the pipe is cut off (claim 4).

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an uninterruptible water supply pipe branching device equipped with a pipe cutting device according to an embodiment of the present invention, and FIG.
3 is a sectional view taken along line AA in FIG.

An uninterrupted water pipe branching device (1) shown in FIG.
Is the first compartment that cuts down the water pipe (2)
(3) and the first compartment through the sluice valve (4).
(3) and the second compartment (5) that can be divided in a watertight manner.

The first compartment which is penetrated by the water pipe (2)
The penetrating part (3a) of (3) is watertightly fixed so that the strength can be sufficiently maintained even if the water pipe (2) is cut midway. Since the details of the uninterruptible water pipe branching device (1) are publicly known, description thereof will be omitted.

The pipe cutting device 6 shown in the figure has a first compartment (3).
Cut the water pipe (2) that penetrates through into two parts,
Moreover, it is a device that can reliably discharge the cut-off removal pipe to the second compartment (5). This pipe cutting device (6) is fixed to a first elevating shaft (7) that is movable in a direction orthogonal to the axis of the water pipe (2) that requires cutting, and the removal of the water pipe (2) is desired. Removal pipe support fixed to the removal pipe (2a)
(8) is provided.

The removal tube support (8) has a split tube structure which can be divided into two parts, an upper support (8a) and a lower support (8b).
Before forming the first compartment (3), it is pre-mounted on the part of the removal tube (2a) desired to be cut. Where the upper support (8
A screw cylinder (9) is fixed in the upper center of a).
A male screw (7a) at the lower end of the first lifting shaft (7) hanging from above is screwed into (9).

The first elevating shaft (7) is connected at its upper end to a driving means (not shown) for moving up and down the axial direction. In the state shown in FIG. 1, the first elevating shaft 7 is lowered. , And
Even if a part of the removal tube (2a) is cut off, the removal tube (2a) has a rigidity sufficient to suspend the weight of the part, and the driving means in the axial direction (not shown) removes the cutting tube (2a). It can exert the power to pull up.

Both end faces (10) in the axial direction of the removal pipe support (8)
Is the required cutting surface (1
A pulley guide means (13) having a movable pulley (12) capable of moving along 1) is provided.

As shown in FIG. 3, the pulley guide means (13) is
With a channel-shaped rail (15) with the opening (14) facing the side,
A slider (16) that slides in the channel and one end fixed to the slider (16) through the opening (14) and the other end bent at a right angle.
It has a mold shaft (17) and a pulley (18) pivotally attached to the other end of the L-shaped shaft (17).

The rail (15) is a water pipe as shown in FIG.
When viewed from the axial direction of (2), the water pipe (2) is provided in parallel to the left and right of the circular cut-shaped cut. Further, as shown in FIG. 1, the rail (15) can be easily pulled out when the cutting pipe (2a) of the water pipe (2) is pulled up by pulling up the first lifting shaft (7). So that it can be taken out, between the two cut surfaces (11) (11), when viewed from the side in the axial direction of the water pipe (2),
The lower part has a narrower distance between the cutting surfaces (11) and (11), and the upper part has a wider distance between the cutting surfaces (11) and (11). Has been.

A second lifting shaft (19) coaxial with the first lifting shaft (7) is provided outside the first lifting shaft (7).
Similarly to the first elevating shaft (7), the (19) is movable in the axial direction by a driving means (not shown). A substrate (21) is fixed to the lower end (20) of the second lifting shaft (19) and is horizontal and orthogonal to the axis of the lifting shaft (19).

On this board (21), a drive pulley (22) is provided on the same plane as the required cutting surfaces (11), (11) which need to be cut at the two locations.
A pair of drive motors (23) and (23), which are fixedly installed so as to position (22) respectively, are provided. Further, the substrate (21) is provided on each of the same planes as the two required cut surfaces (11) (11).
The required number of fixed pulleys, for example, as shown in FIG. 2, in the axial direction of the water pipe (2), in two symmetrical positions, fixed pulleys are provided.
(24) (24) is provided.

An endless wire saw (25) is attached to the drive pulley (22), the fixed pulley (24) and the moving pulley (12) which are arranged on the same plane as the required cut surfaces (11) and (11) at the two locations. Is hung around. This endless wire saw (25) is the first compartment
Before forming (3), and immediately after the removal pipe support (8) is previously attached to the portion of the removal pipe (2a) desired to be cut, each drive pulley (22), fixed pulley (24), moving pulley. It is multiplied by (12).

In the endless wire saw (25), a steel cord is used as a core material, the core material is coated with a synthetic resin material, and at the same time, diamond cutting blades (beads) are embedded in the coating material at required intervals. A so-called diamond wire saw can be applied.

The pipe cutting device of the present invention constructed as described above
The operation of (6) will be described. First, from the cutting start state shown in FIG. 1, the second lifting shaft (19) is gradually adjusted according to the cutting speed of the cutting portion (25a) of the endless wire saw (25). Raise to.

Water pipe in an endless wire saw (25)
Since the pulley supporting the cut portion (25a) in contact with (2) is the moving pulley (12), the movable pulley is moved as the water pipe (2) is cut and as the cut portion (25a) rises. (12) also
Move along the rails (15). At this time, the diamond wire saw tends to cut all the obstacles in its moving direction, but the moving pulley moves without resistance, so this pulley is not cut.

As a result, the cutting portion (25a) of the endless wire saw (25) stretched between the moving pulleys (12) has a cutting surface (11) preset by the inclination of the rail (15). Move to get an accurate draft cut. Further, since the portion of the cutting and removing tube is firmly supported in advance, a dangerous state does not occur immediately before cutting and the cutting edge of the cutting does not bend, so that the cutting and removing tube cannot be removed. No accidents occur.

The present invention is not limited to this embodiment, and various modifications can be made. For example, the fixed pulley (24) may be omitted depending on the usage condition, and a cemented carbide wire saw may be applied instead of the diamond wire saw. Further, although the slider (16) moves in the rail (15), a pulley may be used instead of this slider.

[0030]

【The invention's effect】

(a) Since the wire saw is guided by the guide pulley,
The desired cut surface of the tube can be obtained.

(B) When cutting a waterless pipe, the cutting surface can be cut beforehand by setting a draft, so that the cutting and removing section can be reliably removed.

(C) If a diamond wire saw is used to cut off a waterless pipe, the diamond will easily become compatible with the metal at a predetermined temperature or higher, and the diamond will not serve as a blade. Since water enters from the water pipe, the temperature drops and stable cutting becomes possible.

[0033]

[Brief description of drawings]

FIG. 1 is a side view showing a main part of an uninterruptible water supply pipe branching device to which a pipe cutting device according to an embodiment of the present invention is applied.

FIG. 2 is a view taken along the line AA in FIG.

FIG. 3 is a perspective view showing an example of means 1 for guiding a pulley.

[Explanation of symbols]

(1) Uninterrupted water pipe branching device (2) Water pipe (piping) (2a) Removal pipe (3) Division chamber (3a) Penetration part (4) Gate valve (5) Division chamber (6) Pipe cutting Device (7) Lifting shaft (7a) Male screw (8) Removal pipe support (8a) Upper support (8b) Lower support (9) Screw cylinder (10) Both end faces (11) Cut surface (12) Moving pulley ( 13) Pulley guide means (14) Opening (15) Rail (16) Slider (17) L-shaped shaft (18) Pulley (19) Lifting shaft (20) Lower end (21) Board (22) Drive pulley (23) Drive Motor (24) Fixed pulley (25) Endless wire saw (25a) Cut part

Claims (5)

[Claims] 1. A removal pipe support body comprising saddle-shaped supports, which are attached so as to sandwich the pipe from a plurality of directions, and rails are extended to respective end portions of the respective support bodies. A removal pipe support device for a wire saw, characterized in that, when the rails are joined together, rails at respective end portions form rails that are continuous in the vertical direction, and a movable pulley that is movable is attached to the rails. 2. The removal pipe support device for a wire saw according to claim 1, wherein a diamond wire saw is wound around a moving pulley. 3. The removal pipe support device for a wire saw according to claim 1, wherein the removal pipe support has a lifting shaft fixing portion on an upper portion thereof. 4. A pulley provided with a compartment that watertightly surrounds a pipe that needs to be cut, and a moving pulley that can move along two required cut faces that need to be cut at both end faces in the axial direction of the removal pipe support. The guide means, the drive motors for driving the drive pulleys by arranging the drive pulleys on the same planes as the required cutting surfaces requiring cutting at the two locations, and the drive motors arranged at the same planes as the required cutting surfaces at the two locations. An uninterruptible water pipe cutting, comprising: a fixed pulley; and a drive pulley, a fixed pulley, and an endless wire saw wound around a movable pulley arranged on the same plane as the two required cutting surfaces. apparatus. 5. The removal pipe support moving direction such that the pulley guide means has a slight draft with respect to the direction in which the cutting portion of the pipe is moved, with respect to the required cutting surface requiring cutting at two places. 5. The waterless pipe cutting device according to claim 4, wherein the pipe is widened and inclined.