JP3267349B2 - Pipe support apparatus and pipe connection / disconnection method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a case where, for example, installation, inspection, disassembly, etc. of a gas insulated switchgear in a substation, connection and disconnection work of a flanged steel pipe constituting a unit of the switchgear is performed on site. TECHNICAL FIELD The present invention relates to a tube support device applied to the above and the like, and a tube connection / disconnection method using the tube support device.

[0002]

2. Description of the Related Art Many gas insulated switchgears installed in substations and the like are composed of units such as circuit breakers, disconnectors, main buses, and cable heads, and these units are housed in flanged steel pipes. Then, connection of the connecting portion is performed at the flange.

[0003] Such steel pipes are large and heavy, having a diameter of 1 m or more and a length of about 10 m, and require a large amount of handling. On the other hand, when connecting the flanges, it is necessary to align the cores in units of mm, and it is necessary to carry out dense processing. A simple connection operation is required.

[0004] Further, the connection and disconnection work environment is not always good, for example, the steel pipe installation portion is a narrow space such as in a pit, the installation floor surface is inclined in consideration of drainage, etc., or it is outdoors. .

[0005] Conventionally, on-site assembly of such a steel pipe,
For work such as attaching / detaching or removing for maintenance and inspection, carry in a heavy machine such as a wrecker and lift a steel pipe directly to a predetermined ground level using a chain block, etc. Although the work is performed with care, there are various problems as described below.

[0006]

That is, in a gas insulated switchgear, etc., when excessive stress is applied to an insulating device or the like existing in a connecting portion, the device is damaged, and therefore, a cautiousness is required in a steel pipe attaching / detaching operation. In this case, the conventional technique of lifting and moving the steel pipe with a heavy machine, a chain block, or the like to perform the contacting / separating work easily causes misalignment or the like during the work, and it is difficult to maintain a uniform lifting level. Very cumbersome. Therefore, there is a problem that the work difficulty is extremely high, a high degree of skill is required for slinging and the like, and there is a risk.

Further, when using a heavy machine or a chain block, it is difficult to cover the periphery with a tent or the like, so that there is a problem that work cannot be performed in rainy weather or the like.

The present invention has been made in view of such circumstances, and can support a pipe at a constant level from the floor of an installation portion, even if the equipment arrangement place is narrow or the floor surface is inclined,
Without causing misalignment or requiring a high level of skill,
A pipe connection device that can be easily and reliably, efficiently and safely installed and easily covered by an enclosure even in rainy weather, etc., to connect and disconnect the pipe, and a pipe connection method using the device. The purpose is to provide.

[0009]

According to a first aspect of the present invention, there is provided a tube supporting apparatus comprising: a plurality of jacks having a column and a variable angle seating member provided at a lower end thereof; And a flat base frame supported by these jacks and capable of adjusting the height and levelness, and can be moved horizontally via wheels on parallel guide rails provided on opposite sides of this base frame And a turntable provided on the lower truck and rotatable around a vertical axis, and mounted on a parallel guide rail provided on the turntable via a wheel so as to be movable horizontally. An upper bogie and a tube support roller provided on the upper bogie for rollingly supporting the outer peripheral surface of a tube to be supported below both sides of the axis of the tube.

According to a second aspect of the present invention, in the tube support device of the first aspect, the lower bogie and the upper bogie can be moved by a screw feed mechanism along a guide rail supporting them. It is characterized by the following.

According to a third aspect of the present invention, in the tube support device of the first aspect, the lower bogie and the upper bogie are respectively movable within a certain range along a guide rail supporting them. I do.

According to a fourth aspect of the present invention, there is provided a method of joining / separating a pipe body in which one end in the axial direction of the pipe body is advanced / retracted to / from the object to be connected / joined / separated. One and two or more tube support devices according to claim 3 are arranged at a position near the connection object, and one or two or more tube support devices according to claim 3 are arranged at positions far from the connection object. Align the moving direction of the lower bogie with the axis of the tube,
In this state, the tube is supported on the tube support roller, and the screw feed mechanism of the tube support device is operated to connect and disconnect the tube.

[0013]

According to the apparatus and method of the present invention, the following functions can be obtained.

For example, when connecting one pipe to another pipe along a horizontal axis, the pipe is first lifted or the like so that the axis is slightly above the axis at the time of the final connection. It is positioned near the connection part in a substantially parallel arrangement. Since this operation is a preparatory operation, excessive precision is not required for setting the axis of the tube.

Next, for example, a pair of tube support devices of the present invention are installed on the lower floor surface of the tube so as to be separated from each other in the connecting direction, and are installed before and after. In this case, each tube support device adjusts the support height of the jack according to the inclination of the floor surface, etc., accurately obtains the level of the base frame using a level, etc., and adjusts the position of the tube support rollers by the tube body. Is set so that the center of the axis coincides with the axis at the time of the final connection. In addition, since the jack has a variable angle seating member at the lower end, even when the installation surface of the tube support device is inclined, each jack can be installed in a state following the inclination.

In this case, the direction of each tube supporting device is set so that the guide rails of the base frame are parallel to the axis of the tube, and each of the lower bogies supported by the guide rails. The tube is retracted to the side opposite to the connecting side by the moving distance required for connecting the tube.

Further, the guide rails of the upper carriage of each tube supporting device are arranged so as to be oriented substantially perpendicular to the axis of the tube.

In such a state, the tube is lowered from the initial lifting position and placed on the tube supporting rollers of each tube supporting device. At this time, the upper carriage of the tube support device is
Since each base frame is supported via a turntable, the rotation of the turntable immediately adjusts the orientation of the upper bogie on the horizontal plane to the axis of the tube.

In this case, since the vertical axis of each pipe supporting device is set horizontally at the time of installation, the vertical axis of the mounted pipe coincides with the final connection axis at the time of mounting. I do. Even if there is some deviation, it can be easily adjusted by operating the jack. Thereby, the pipe is horizontally supported at a plurality of front and rear positions along the axial direction.

When the axis of the tube placed on the tube support device is shifted left and right on the horizontal plane with respect to the final connection axis, the upper carriage is moved in a direction intersecting the final connection axis. By performing the movement adjustment, the final connection axis and the axis of the tubular body can be surely matched with high accuracy.

Further, the rotational position of the tube around the axis can be adjusted by a rolling operation of the tube on the tube support roller. Therefore, the axis of the tube can be easily and surely matched with the axis of the tube support device three-dimensionally.

When the lower bogie of each tube supporting device is moved in the connecting direction in a state where the final axis and the tube axis are aligned, the tube can be highly accurately adjusted with respect to a predetermined connecting device. Since the connection can be made in the state of centering, the bolt connection of the flange may be performed thereafter.

When the tube in the connected state is to be detached, the tube supporting device according to the present invention is arranged at the lower part of the tube, and the tube supporting roller is joined to the lower surface of the tube. Then, the reverse operation may be performed. Also in this case, there is no deviation of the shaft center and the like, and there is no fear of breakage of the device, and the work can be performed safely and efficiently.

In addition, since the tube supporting device of the present invention supports the tube below the tube, it does not hinder installation of an enclosure such as a tent. Therefore, since the enclosure can be installed in accordance with the weather condition, it is possible to easily cope with weather deterioration during the work.

[0025]

An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, for example, the tube supporting apparatus 1 of this embodiment is basically a flat base which is supported by a plurality of jacks 2 and whose height and level can be adjusted. A frame 3; a lower bogie 6 mounted on a parallel guide rail 4 provided on the opposite side of the base frame 3 via a wheel 5 so as to be horizontally movable; and a vertical shaft provided on the lower bogie 6 A turntable 7 rotatable around a center, an upper carriage 10 mounted on a parallel guide rail 8 provided on the turntable 7 via wheels 9 so as to be horizontally movable, and provided on the upper carriage 10 A tube support roller 11 that rolls and supports the outer peripheral surface of the tube to be supported below both sides of the axis of the tube is provided.

More specifically, the jack 2 comprises a threaded column 2a, a variable angle seating member 2b attached to the lower end of the column 2a, and an operation head 2c provided at the upper end of the column 2a. And the support 2a is a support portion 3a of the base frame 3.
Is screwed into. The support height of the base frame 3 by each jack 2 can be adjusted by attaching the jack handle 12 to the support head 2c of the jack 2 and rotating the support, thereby reducing the horizontality of the base frame 2. You can adjust it.

The base frame 3 is formed, for example, in a rectangular shape. The long-side arms of the base frame 3 are U-shaped in cross section, and the sides facing each other are opened, whereby the guide rail 4 is formed. ing. Wheel 5 engaging with guide rail 4
Are provided at intervals on each side surface of the lower bogie 6 so that the lower bogie 6 travels in one direction a. The lower carriage 6 is supported so as to be able to stop by a stopper 13 made of, for example, a wing nut.

In the tube support device 1 shown in FIGS. 1 and 2, the lower bogie 6 can be fed via the feed mechanism 14 in the moving direction a along the guide rail 4 with respect to the base frame 3. ing. The feed mechanism 14 includes, for example, a ball screw 15 supported by the base frame 3 and screwed to the lower carriage 6, and a bolt-shaped head 16 formed at an end of the ball screw 15, and is not shown. By rotating the head 16 with a ratchet-type operation tool or the like, the movement of the lower bogie 6 can be adjusted.

The turntable 7 is arranged at the center of the lower bogie 6 and is rotatable about a vertical axis as indicated by an arrow c in FIG. A second guide rail 8 is mounted on the upper surface of the turntable 7 so as to be integrally rotatable. In the state shown in FIG. 2, the guide rails 8 are arranged orthogonal to the guide rails 4 of the base frame 2 and have a U-shaped cross section and open sides facing each other. This guide rail 8
The three wheels 9 are provided at intervals on each side surface of the upper bogie 10 so that the upper bogie 10 travels in a direction b orthogonal to the lower bogie 6. Although not shown, the upper bogie 10 can also be stopped by a stopper similar to the above.

In the tube support device 1 shown in FIGS. 1 and 2, the upper carriage can also be fed through a feed mechanism 17. The feed mechanism 17 has, for example, a ball screw 18 supported by the lower carriage 6 and screwed to the upper carriage 10, and a bolt-shaped head 19 formed at an end of the ball screw 18, and is not shown. By rotating the head 19 with a ratchet type operation tool or the like, the movement of the upper bogie 10 can be adjusted.

Further, the tube supporting roller 11 is
Are provided as a pair on the front and rear and left and right via a bracket 20. One unit of the tube support roller 11 is arranged to be inclined at a predetermined angle and has two rotatable rollers. In addition,
Reference numeral 21 denotes a bracket for mounting the tube holding belt.

FIGS. 3 and 4 show another example of the structure of the tube supporting device. This tube support device 1 'is basically similar to that shown in FIGS. 1 and 2, but does not have a feed mechanism. That is, the lower bogie 6 and the upper bogie 10 are movable within a certain range along the directions of the guide rails 4 and 8 that support them. The other configuration is substantially the same as that of the tube support device 1, and the corresponding portions in FIG.
2 and the same reference numerals as those in FIG.

Next, a method of connecting / disconnecting a pipe using each of the pipe support devices 1 and 1 'will be described with reference to FIG.

Basically, the method of the present embodiment is configured such that one end A1 in the axial direction of the tube A is moved forward and backward with respect to the object B to be joined.
This is a joining / separating method of a pipe to be detached. One pipe support apparatus 1 shown in FIGS. 1 and 2 is located at a position close to an object B to be connected, and a pipe support apparatus 1 shown in FIGS. ´ to 1
The table is placed at a position far from the connection object B. Then, the moving direction a of the lower carriage 6, 6 of each of the tube supporting devices 1, 1 'is set along the axis of the tube, and in this state, the tube A is supported on the tube supporting rollers 11, 11. The connection / disconnection of the pipe is performed by operating the screw feed mechanism 14 of the pipe support apparatus 1 shown in FIGS. 1 and 2.

More specifically, in this embodiment, as shown in FIG. 5, one pipe A constituting a gas insulated switchgear is connected to another pipe B to be connected along a horizontal axis. Connecting.

First, the pipe A is lifted by a crane,
It is located near the connecting portion in such a manner that the axis is substantially parallel to the axis slightly above the axis at the time of the final connection. Since this operation is a preparation operation, excessive accuracy is not required for setting the axial center of the tube A.

Next, the tube support devices 1 and 1 'of this embodiment are installed on the lower floor of the tube in the connecting direction so as to be separated from each other. In this case, each of the tube support devices 1, 1 'adjusts the support height of the jack 2 according to the inclination of the floor surface C (α, β in FIGS. 3 and 4), and the level of the base frame 3 by a level. And the position of the tube support roller 11 is adjusted to the tube A.
Is set so that the center of the axis coincides with the axis at the time of the final connection. In addition, the jack 2 has an angle-variable seating member 2b at the lower end.
Therefore, even when the installation surface C of the tube support devices 1, 1 'is inclined, each jack 2 can be installed in a state following the inclination.

Also, in this case, each of the tube support devices 1, 1 '
Are set so that the guide rails 4 of the base frame 3 are parallel to the axis of the tube A, and the lower bogies 6 supported by the guide rails A are required for connection of the tube A. It is set in a state of being retracted to the side opposite to the connection side by the moving distance (the right side in FIGS. 1, 2, and 5).

Further, the guide rails 8 of the upper carriage 10 of each of the tube supporting devices 1 and 1 'are arranged so as to be substantially perpendicular to the axis of the tube A.

In such a state, the pipe A is lowered from the initial lifting position and placed on the pipe support rollers 11 of the respective pipe support apparatuses 1 and 1 '. It is fixed with a belt 23 or the like attached through the like.
At this time, since the upper bogies 10 of the tube supporting devices 1 and 1 'are supported by the respective base frames 3 via the turntables 7, the upper bogies 1 are rotated by the rotation of the turntables 7.
The orientation on the horizontal plane of 0 immediately adapts to the axis of the tube A.

In this case, since the vertical axis of each of the tube support devices 1, 1 'is set horizontally at the time of installation, the vertical axis of the mounted tube A is the final axis at the time of mounting. Match the connection axis. Even if there is some deviation, it can be easily adjusted by operating the jack 2. Thereby, the pipe is horizontally supported at a plurality of front and rear positions along the axial direction.

When the axis of the tube A mounted on the tube support devices 1, 1 'is shifted left and right on the horizontal plane with respect to the final connection axis, the upper carriage 10 is moved to the final connection axis. By adjusting the movement in the direction intersecting with the heart, the final connection axis and the axis of the tube A can be surely matched with high accuracy.

Further, the positioning of the rotation of the pipe A around the axis (in the direction of the arrow d in FIG. 4) can be performed by the rolling operation of the pipe A on the pipe support roller 11. Therefore, tube A
Can easily and surely coincide with the axes of the tube support devices 1, 1 'three-dimensionally.

When the lower bogie 6 of each of the tube support devices 1, 1 'is moved in the connection direction a in a state where the final axis and the tube axis coincide with each other, the other tubes B On the other hand, since the pipe A can be connected in a state of high-precision alignment, bolt connection or the like of the connection portion may be performed thereafter.

According to the above-described embodiment, the pipe A can be supported at a constant level from the floor of the installation portion even when the equipment arrangement place is narrow or the floor surface is inclined, and misalignment or the like may occur. The tube can be connected easily, reliably, efficiently and safely without requiring a high level of skill.

When the tube A in the connected state is detached, the tube supporting devices 1 and 1 'according to the present invention are arranged below the tube A, and the tube supporting rollers 11 are connected to the tube A. , And in this state, the reverse operation may be performed. Also in this case, there is no deviation of the shaft center and the like, and there is no fear of breakage of the device, and the work can be performed safely and efficiently.

Further, the tube supporting devices 1, 1 'of this embodiment
Does not hinder the installation of enclosures such as tents since the support is provided below the pipe A. Therefore, since the enclosure can be installed in accordance with the weather condition, it is possible to easily cope with weather deterioration during the work.

In the above embodiment, the connection of the tubes constituting the gas insulated switchgear for the substation has been described.
The present invention is not limited to this, and can be applied to connection / disconnection of various steel pipes and the like.

Although not shown, the tube supporting device of the present invention can be moved by a moving wheel mounted on the device itself or mounted on another bogie.

Further, in the above-described embodiment, an example using a pair of tube support devices 1, 1 'has been described, but the present invention is not limited to this. For example, when the tube A is short, the tube can be supported using only one tube support device 1 shown in FIGS. Conversely, if the tube A is long,
It is also possible to use one tube support device 1 shown in FIG. 2 and two or more other tube support devices 1 ′ shown in FIGS.

[0052]

As described above, according to the present invention, the pipe can be supported at a constant level from the floor of the installation portion even if the equipment arrangement place is narrow or the floor surface is inclined, and misalignment and the like can be achieved. The pipe can be connected and disconnected easily and reliably, efficiently and safely, without the need for a high degree of skill and without requiring a high level of skill.

[Brief description of the drawings]

FIG. 1 is a front view showing a tube support device according to an embodiment of the present invention.

FIG. 2 is a plan view showing the tube support device of the embodiment in a partial cross section.

FIG. 3 is a diagram showing another example of the configuration of the tube support device in the same embodiment together with an operation in a partial cross section.

FIG. 4 is a side view of FIG. 3;

FIG. 5 is an operation explanatory view according to the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1 'Tube support apparatus 2 Jack 2b Seating member 3 Base frame 4, 8 Guide rail 5, 9 Wheel 6 Lower bogie 7 Turntable 10 Upper bogie 11 Tube support roller 14 Screw feed mechanism A Tube

Claims (4)

(57) [Claims] 1. A plurality of jacks having a column and a variable-angle seating member provided at a lower end thereof, and a flat base frame supported by these jacks and capable of adjusting height and levelness. A lower carriage mounted on a parallel guide rail provided on opposite sides of the base frame so as to be movable horizontally via wheels, and a turntable provided on the lower carriage and rotatable around a vertical axis. An upper carriage mounted on a parallel guide rail provided on the turntable via wheels so as to be horizontally movable, and an outer peripheral surface of a pipe provided on the upper carriage and to be supported is defined by an axis of the pipe. And a tube support roller that rolls and supports the lower side of both sides of the tube support device. 2. The tube support device according to claim 1, wherein the lower bogie and the upper bogie are movable along a guide rail supporting them by a screw feed mechanism. 3. The tube support device according to claim 1, wherein the lower bogie and the upper bogie are each movable within a certain range along a guide rail supporting the lower bogie and the upper bogie. 4. A method for joining / removing a pipe body in which one end in the axial direction of the pipe body is moved forward / backward with respect to a connection object to join / remove the pipe body, wherein the one pipe supporting apparatus according to claim 2 is connected to the tube body. 4. A tube carrier supporting device according to claim 3, wherein one or more tube supporting devices are arranged at positions far from the connection object, and a moving direction of a lower carriage of each of the tube supporting devices. Is arranged along the axis of the tube, and in this state, the tube is supported on the tube support roller, and the screw feed mechanism of the tube support device according to claim 2 is operated to connect / disconnect the tube. A method for connecting / disconnecting a tubular body, characterized in that it is performed.