JP2531362Y2 - Tube switchgear - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION INDUSTRIAL APPLICATION Field of the Invention The present invention relates to an underground pipe for transporting city gas, for example, in which an elongated body such as a cable having a pipe inspection device such as a television camera is attached to a pipe. The present invention relates to a pipe opening / closing device which can be suitably implemented for insertion or discharge while maintaining airtightness with the outside.

2. Description of the Prior Art Typical prior arts are shown in FIGS. 10 and 11, respectively. First, as shown in Fig. 10, a relatively small clamp means 2 is attached to a submerged pipe 1 which is a relatively small branch pipe having a nominal diameter of 50A or 88A for transporting city gas, and a hole is drilled. The opening 3 can be opened and closed by an opening / closing means 5 having a shutter plate 4. On this opening / closing means 5, a television camera 6 and a long body 7 such as a cable connected thereto are inserted and ejected. Insertion / ejection means 8 are provided detachably, thus allowing the insertion and ejection of the television camera 6 into and from the tube 1 while maintaining the airtightness.

In other prior art, as shown in FIG.
Underground buried pipe 10 which is a relatively large main pipe of 100A to 300A
The clamp means 11 is attached to the
Then, the insertion / ejection means 12 is attached without attaching the opening / closing means 5 shown in FIG. 10 described above, and the cable 13 and the television camera attached to the distal end thereof are inserted into and ejected from the tube 10. .

In the prior art shown in FIG. 11, since the opening / closing means 5 shown in FIG. 10 is not provided, when the pipe 10 is an active pipe and city gas is being transported, the insertion / removal means is not used.
The discharge means 12 must be quickly attached to and detached from the clamp means 11. Therefore, it is conceivable to attach a large opening / closing means to the clamping means 11 attached to such a large-diameter tube 10 and attach an insertion / ejection means 12 to the large opening / closing means. Such a large-sized opening / closing means is extremely expensive, and requires time and labor for transportation to the site.

SUMMARY OF THE INVENTION An object of the present invention is to provide a pipe opening / closing device that can commonly use opening / closing means regardless of the outer diameter of the pipe.

Means for Solving the Problems The present invention provides a first clamping means 16 attached to a first tube 15.
The housing 51 can be detachably attached via a support member 31 or directly to a second clamping means 167 attached to a second pipe 167 smaller in diameter than the first pipe 15. The first clamping means 16 surrounds the first pipe 15 and has a pair of outward flanges 25 and 27. The first clamping means 16 corresponds to holes formed on the side of the first pipe 15. A first connection hole 49 is formed, and the support member 31 has a second connection hole 50 which is disposed on the first clamp means 16 and overlaps the first connection hole 49 and communicates therewith. A pair of long holes 37 extending along the longitudinal direction on both longitudinal sides of the first pipe 15;
A pair of bolt insertion holes 38 are formed on both sides in the longitudinal direction of the connection hole 50 and closer to the second connection hole 50 than the long hole 37, and the second clamp means 67 surrounding the second pipe 167 is formed in the second clamp means 67. , Second
A fourth connection hole 71 corresponding to a hole formed in a side portion of the pipe 167 is formed, and the housing 51 is provided with the support member 31 or the second clamp means.
A third connection hole 54 is disposed on the first and second pipes 51 and 167, extends elongated along the tube axes 36 and 136 of the first and second pipes 51 and 167, and overlaps and communicates with the second connection hole 50 or the fourth connection hole 71. On both sides of the third connection hole 54 in the direction crossing the first pipe 15 or the second pipe 167, the pipe shaft 36 of the first pipe 15 and the second pipe 16 are provided.
A pair of locking notches 56 that are open along the pipe shaft 136 are formed in the housing 51, and a position for closing the third connection hole 54 in the housing 51;
A shutter plate 52 that is movable in the elongated direction of the housing 51 is stored between a position where the third connection hole 54 is opened, and a support member 31 is attached to the first clamp means 16.
The first mounting member 33 attached to a pair of locking portions fixed to the flanges 25 and 27 of the first clamp means 16 and having external threads engraved therein is inserted into the elongated hole 37 of the support member 31, and the first A first nut 45 is screwed into an external thread of the mounting member 33, and a pair of bolts 57 is inserted between the bolt insertion hole 38 of the support member 31 and the notch 56 for locking in order to mount the housing 51 on the support member 31. Then, the second nut 58 is screwed into the bolt 57, and the housing 51 is attached to the second clamp means 67. In order to attach the housing 51 to the second clamp means 67, a plate-like holding member 72 is provided on the side opposite to the side on which the housing 51 is provided. A pair of second mounting members 73 fixed to the holding member 72 and provided with external threads are inserted through the bolt insertion holes 38 of the housing 51, and the third nuts are inserted into the external threads of the second mounting members 72. The insertion / ejection means 19 is provided so that the insertion / ejection means 19 can be detachably mounted on the housing 51. 19, the longitudinal body 21 first and second pipe 1
A tube opening / closing device, which is inserted into the 5,167 or discharged from the first and second tubes 15,167.

According to the present invention, a housing 51 for accommodating the shutter plate 52 can be detachably attached to the large-diameter first tube 15 via the first clamping means 16 and the support member 31. The housing can be detachably attached to the second tube 167 directly to the second clamp means 67. Thus, the housing 51, the shutter plate 52, and the insertion / ejection means 19 can be shared.

As described above, when the pipe diameter is relatively large, the housing 51 is attached to the large first clamping means 16 that matches the pipe diameter via the support member 31, and when the pipe diameter is relatively small, the housing 51 is fitted to the pipe diameter. The housing 51 is directly mounted on the relatively small second clamp means 67 without the support member 31 interposed therebetween. This makes it possible to share the housing 51 and to attach the housing 51 to pipes having different outer diameters.

The support member 31 has a second connection hole which is connected to the first connection hole in an airtight manner. The housing 51 has a third connection hole which is connected to the second connection hole of the support member 31 in an airtight manner or is connected to the fourth connection hole of the second clamp means 67 which is relatively small. The third connection hole can be opened and closed by a shutter plate. In this way, when the first and second clamp means 16, 67 are configured to be large or small according to the size of the outer diameter of the pipe, the housing 51 is shared by these large and small first and second clamp means 16, 67. Therefore, the first and second clamping means 16, 67 can be used.
It is not necessary to prepare a housing 51 and the like corresponding to each of the large and small shapes.

FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is a cross-sectional view of the embodiment, and FIG. 3 is a sectional view of FIG.
It is sectional drawing seen from III-III. Referring to these drawings, the underground pipe 15 for transporting city gas has a nominal diameter of 100A to
A steel pipe called a main pipe of 300 A, a clamp means 16 is attached to this pipe 15, an auxiliary connecting means 17 is attached, and an opening / closing means 18 is attached. An insertion / ejection means 19 is detachably provided on the opening / closing means 18, whereby the television camera 20 and a longitudinal body 21 such as a cable connected thereto are provided.
Can be inserted into the tube 15 in a gas-tight manner, and can be discharged from the tube 15, so that the inside of the tube 15 can be inspected.

The clamp means 16 has a pair of upper and lower clamp members 22,23. One clamp member 22 has a semicircular outer portion 24.
And a flange 25, and another clamping member.
23 has a semicircular outer portion 26 and a flange 27, and the flanges 25 and 27 are fixed to each other by bolts 28 and nuts 29 to surround the tube 15.

The auxiliary connection means 17 basically has a support member 31 whose plan view is shown in FIG. 4, a locking piece 32 whose cross section is shown in FIG. 5, and a rod-shaped mounting member 33. Support member 31
Has a flat elongated support portion 34 and a straight cylindrical tubular portion 35 erected on the support portion 34. The longitudinal direction (the left-right direction in FIG. 4) of the support portion 34 extends in a direction perpendicular to the tube axis 36 of the tube 15. Along the longitudinal direction of the support portion 34, a pair of long holes 37
Is formed. Further, a bolt insertion hole 38 is formed closer to the center than the elongated hole 37. The locking piece 32 has a substantially C-shaped cross section, and includes upper and lower locking portions 39 and 40 and a connecting portion 4 thereof.
With one. The locking portions 39, 40 are formed with notches 42, 43 as clearly shown in FIG. 6, so that the flanges are formed between the locking portions 39, 40 regardless of the bolt 28 and the nut 29. Can be locked to 25,27. The base end of the mounting member 33 is fixed to the upper locking portion 40 by welding or the like. The attachment member 33 passes through a long hole 37 formed in the support portion 34 of the support member 31. The mounting member 33 has an external thread 44
And a butterfly nut 45 is screwed into the outer screw 44. Thus, the support member 31 is detachably attached to the clamp means 16.

A packing 47 made of rubber or the like is attached to the inward step portion 46 of the cylindrical portion 35. This packing 47 comes into contact with an end face of a cylindrical portion 48 formed on the clamp member 22 of the clamp means 16. The cylindrical portion 48 formed in the outer surrounding portion 24 of the clamp member 22 forms a first connection hole 49. Support member 31
The cylindrical portion 35 forms a second connection hole 50.

FIG. 7 is a plan view of the opening / closing means 18, and FIG. The opening / closing means 18 includes a flat airtight housing 51, a shutter plate 52 housed in the housing 51, and an operation rod 53 connected to the shutter plate 52.
And A third connection hole 54 is formed in the housing 51. The connection hole 54 is closed by the shutter plate 52 by pushing the operating rod 53 to the left in FIGS. 7 and 8. The connection hole 54 can be opened by pulling the operating rod 53 to the right in FIGS. 7 and 8.
A locking portion 55 protruding laterally is fixed to the housing 51, and a locking notch 56 is formed in the locking portion 55.

As shown in FIG. 3, a bolt 57 is inserted through a bolt insertion hole 38 formed in the support portion 34 of the support member 31 of the above-described auxiliary connection means 17, and the bolt 57 locks the opening / closing means 18. The notch 56 formed in the portion 55 is inserted and screwed into the nut 58. In this manner, the opening / closing means 18 is detachably attached to the auxiliary connection means 17, and a packing 59 made of rubber or the like attached to the housing 51 abuts on the end face of the cylindrical portion 35, and thus the connection holes 50, 54 are air-tightly connected. I do. A screw hole 60 is formed on the housing 51, and a bolt 61 is screwed into the screw hole 60, so that the above-described insertion / ejection means 19 can be detachably and airtightly mounted. At the base end of the insertion / ejection means 19, a locking part 62 is formed.
61 is locked and air-tightly fixed to the housing 51 of the opening / closing means 18.

The clamp means 16 is fixed to the pipe 15, and the auxiliary connection means
The opening / closing means 18 is fixed via 17 and on this opening / closing means 18,
The drilling means having a drill is mounted, the shutter plate 52 of the opening / closing means 18 is opened, and a hole 64 is drilled in the pipe 15. On the outer periphery of the hole 64, an endless seal member 65 is previously interposed between the outer peripheral surface of the tube 15 and the inner peripheral surface of the arc portion 54 of the clamp member 22, so that airtightness is maintained. After this drilling,
With the connection hole 54 closed by the shutter plate 52 of the opening / closing means 18, the above-mentioned perforating means is removed from the opening / closing means 18, and then the insertion / ejection means 19 is mounted using bolts 61. Thereafter, the connection hole 54 is opened by the shutter plate 52, and the TV camera 20 and the elongated body 21 are clearly shown in FIG.
Is inserted into the tube 15. The guide bar 66 guides the television camera 20 and the elongated body 21 by smoothly pushing them into the tube 15. In this way, a large clamping means 16 is attached to the pipe 15 having a large outer diameter.
Is mounted, and the opening / closing means 18 is
Is attached.

Referring to FIG. 8, the opening / closing means 18 is mounted in association with an underground pipe 67 which is a branch pipe having a nominal diameter of, for example, 50A or 80A. The tube 67 is provided with a clamp member 68 which is smaller than the clamp means 16 and which is substantially similar in shape.

FIG. 9 is a simplified cross-sectional view taken along section line IX-IX of FIG. The clamp means 67 has a pair of clamp members 68 and 69 and is fixed to the tube 167. A tubular part 70 is attached to the clamp member 68. A packing 59 provided in the housing 51 of the opening / closing means 18 abuts on the cylindrical portion 70, and a connection hole 71 formed in the cylindrical portion 70 of the clamp member 68 in this way is formed in the housing 51 of the opening / closing means 18. The connection hole 54 is air-tightly communicated. At the lower part of the clamping means 67, a holding member 72 extends perpendicularly to the tube axis 136 of the tube 167, and the base end of a rod-shaped mounting member 73 is fixed to the holding member 72. Is inserted into a notch 56 formed in a mounting portion 55 of the opening / closing means 18, and a nut 75 is detachably screwed and fitted into an external screw 74 formed at an end of the mounting member 73. Thus the relatively small clamping means 67
, The opening / closing means 18 is directly detachably mounted. Therefore, with respect to the large-diameter pipe 15 and the small-diameter pipe 67,
The hole 18 and the above-mentioned perforating means and the insertion / ejection means 19 mounted thereon can be used in common.
Therefore, it is not necessary to make the opening / closing means 18 large so as to be compatible with the large-diameter pipe 15 and the large clamping means 16, so that the opening / closing means 18 can be realized at low cost, and the opening / closing means 18 is Since it is small, it is convenient for transportation and the like, and the workability on site is good.

Each of the clamp members 22 and 23 has a semicircular outer portion 24 and 26 surrounding the pipe 15 and an outer portion 2 of the clamp members 22 and 23.
4, a pair of outward flanges 25, 27 extending along the pipe axis 36 of the pipe 15 are provided. The support member 31
It has a connecting hole 50 that extends in the longitudinal direction across the pipe 15 and is disposed on the outer peripheral portion 24 of the clamp member 22 and overlaps and communicates with the connecting hole 49.
A pair of long holes 37 extending along the longitudinal direction are formed,
Further, a pair of bolt insertion holes 38 are formed on both sides in the longitudinal direction of the connection hole 50 and closer to the connection hole 50 than the long hole 37.

The housing 51 is disposed on the support member 31, and the tubes 15, 167
A connection hole 54 is formed near the one end in the elongate direction, and is formed near the other end in the elongate direction, and a shutter is provided near the other end in the elongate direction. The board storage space is formed airtight, and the connection holes 54
On both sides in the direction crossing the pipe 15, a pair of locking notches 56 opened along the pipe axis 36 of the pipe 15 and the pipe axis 136 of the pipe 167 are respectively formed. In the housing 51, a shutter plate 52 is housed. The shutter plate 52 has a connection hole 54
Is movable in the elongated direction of the housing 51 between a position where the housing 51 is closed and a position where the connection hole 54 is opened by being housed in the shutter plate housing space.

One end of an operation rod 53 is connected to the shutter plate 52, and the other end of the operation rod 53 penetrates the housing 51 from the shutter plate storage space on the side opposite to the connection hole 54 in the elongated direction. Then, it extends outward along the tube axis 36 of the tube 15 and the tube axis 136 of the tube 167.

Each of the clamp members 68 and 69 has a semi-circular outer portion surrounding the tube 167, and a pair of outer portions protruding outward from the tube 167. The flanges of each of the clamp members 68 and 69 are fixed to each other, and a connection hole 71 through which the connection hole 54 of the housing 51 overlaps and communicates with the outer peripheral portion of the clamp member 68. It is formed.

The locking portion 39 is locked to a surface of each of the flanges 27 of the clamp member 23 on the side opposite to the clamp member 22 (the lower surface in FIG. 5). The mounting member 33 is arranged in a direction (vertical direction in FIG. 3) that intersects with the tube axis 36, which is a direction perpendicular to the plane of the paper of FIG. ) Has a base end portion that extends in a rod shape and is fixed to the locking portion, and a free end portion in which the external screw 44 is engraved, and passes through the long holes 37 of the support member 31 respectively. The nut 45 is detachably screwed to the external thread of the mounting member 33 on the side opposite to the clamping means 16 with respect to the support member 31 (upper side in FIG. 3). Bolt 57
The nut 58 is inserted into the housing 51 through the bolt insertion hole 38 of the support member 31 and the notch 56 for locking.
On the side opposite to 31 (upper side in FIG. 3), it is screwed into the bolt 57 and locked.

The holding member 72 extends across the tube 167 and
9 is in contact with the outer peripheral portion on the side opposite to the clamp member 68 (the lower side in FIG. 9). The mounting member 73 is located on both outer sides of the clamping means 67, and is connected to the pipe shaft 1 in a direction perpendicular to the plane of FIG.
A base end portion extending in a rod shape in a direction (vertical direction in FIG. 9) intersecting with the direction in which the holding member 72 extends (the left-right direction in FIG. 9) and fixed to the holding member 72, 74 has a free end in which a cutout is formed, and the locking notch 56 of the housing 51 is inserted through each. Nut 75 is the housing 51
With respect to the clamping means 67 (upper side in FIG. 9)
Then, it is detachably screwed to the external thread of the second mounting member 73.

Effect of the Invention As described above, according to the present invention, the first and second clamp means 16, 67 are provided so as to be adapted to a plurality of types of pipes having different outer diameters, respectively. The housing 51 is mounted via the support member 31, and the housing 51 is directly connected to the relatively small clamping means, thus sharing the housing 51 with the large first clamping means 16 and the small second clamping means 67. Can be used. Therefore, it is not necessary to form a large-sized housing 51 corresponding to the large first clamping means 16, and the housing 51 may be small, and thus the housing 51 can be realized at low cost. Since is small, it can be easily transported to the site.

In particular, according to the present invention, the housing 51 is commonly used for the first tube 15 and the second tube 167 having a smaller diameter than the first tube 15 so that the first tube 15 and the second tube 167 can be attached and detached.
To allow the elongate body 12 to be inserted / ejected.

Moreover, according to the present invention, the shutter plate 52 and the operating rod 53
Moves along the pipe axes 36, 136 of the first and second pipes 15, 167, so that the third connection hole 54 of the housing 51 is fully opened so that a large space is provided on both outer sides of the first and second pipes 15, 167. No work space is required, which also requires a small working space.

According to the present invention, the support member 31 is formed with a pair of long holes 37, and the first mounting member 33 is configured to pass through these long holes 37, respectively.
Even if various changes are made in accordance with the outer diameter of the tube 15, the support member 31, the locking portion 39, the first mounting member 33, and the first nut 45 can be shared by a plurality of types of first clamping means 16. The effect that can be achieved is achieved.

Further, according to the present invention, the holding member 72 is configured to abut the outer peripheral portion of the fourth clamp member 69 on the side opposite to the third clamp member 68 (as described above, the lower side in FIG. 9), Therefore, the holding member 72 and the second mounting member are shared by a plurality of types of second clamping means 67 corresponding to the outer diameter of the second pipe 167.
There is also an effect that 73 and the third nut 75 can be used.

[Brief description of the drawings]

FIG. 1 is a perspective view of one embodiment of the present invention, FIG. 2 is a cross-sectional view of the embodiment shown in FIG. 1, and FIG. 3 is a section line II in FIG.
FIG. 4 is a simplified cross-sectional view as viewed from I-III.
5 is a sectional view showing the locking piece 32 and the mounting member 33; FIG. 6 is a plan view showing the locking piece 32 and the mounting member 33; FIG. 7 is a plan view of the opening / closing means 18; Fig. 8 shows opening / closing means 18
And the opening / closing means 18 is a small-diameter pipe 167.
9, FIG. 9 is a simplified sectional view taken along section line IX-IX in FIG. 8, and FIG. 10 is a prior art small-diameter pipe 1 in which an opening / closing means 5 is provided. FIG. 11 is a cross-sectional view showing a mounted state, and FIG. 11 is a perspective view showing a state in which the insertion / ejection means 12 is attached to a large-diameter tube 10 of the prior art. 15,167 pipe, 16,67 clamp means, 17 auxiliary connection means, 18 opening / closing means, 19 insertion / discharge means, 20 television camera, 31 support member, 32 locking piece, 33 mounting member, 49…
1st connection hole, 50 ... 2nd connection hole, 51 ... housing, 52 ... shutter plate, 53 ... operation rod, 54 ... 3rd connection hole, 64 ... hole, 72 ...
Holding member, 73 ... Mounting member

Claims (1)

(57) [Scope of request for utility model registration] A first clamping means mounted on a first tube.
A second pipe 167 attached to the second pipe 167 having a smaller diameter than the first pipe 15 via the support member 31 or
The housing 51 can be detachably attached directly to the clamp means 67. The first clamp means 16 surrounds the first tube 15 and has a pair of outward flanges 25, 27. A first connection hole 49 corresponding to a hole formed on the side of the first tube 15 is formed in the clamp means 16, and the support member 31 is disposed on the first clamp means 16,
A second connecting hole 50 overlapping and communicating with the connecting hole 49, a pair of long holes 37 extending along the longitudinal direction on both longitudinal sides of the second connecting hole 50 traversing the first pipe 15, 2
A pair of bolt insertion holes 38 are formed on both sides in the longitudinal direction of the connection hole 50 and closer to the second connection hole 50 than the long hole 37, and the second clamp means 67 surrounding the second pipe 167 is formed in the second clamp means 67. , 2nd tube 1
A fourth connection hole 71 corresponding to the hole formed on the side of the 67 is formed, and the housing 51 is provided with the support member 31 or the second clamp means 67.
A third connection hole 54 is formed on the first and second pipes 51 and 167 and extends along the tube axes 36 and 136 of the first and second pipes 51 and 167 and overlaps and communicates with the second connection hole 50 or the fourth connection hole 71. On both sides of the connection hole 54 in the direction crossing the first pipe 15 or the second pipe 167, the pipe shaft 36 of the first pipe 15 and the second pipe 167 are provided.
A pair of locking notches 56 opened along the pipe shaft 136 are formed between the position where the third connection hole 54 is closed and the position where the third connection hole 54 is opened in the housing 51. A shutter plate 52 movable in the elongated direction of the housing 51 is housed therein, and a pair of first and second flanges 25 and 27 fixed to the first clamping means 16 for attaching the support member 31 to the first clamping means 16. The first is attached to the locking part and the outer thread is engraved.
The mounting member 33 is inserted into the elongated hole 37 of the supporting member 31, the first nut 45 is screwed into the external thread of the first mounting member 33, and the supporting member 51 is mounted on the supporting member 31.
In order to insert a pair of bolts 57 between the bolt insertion hole 38 of 31 and the notch 56 for locking, screw the second nut 58 to the bolt 57, and attach the housing 51 to the second clamp means 67,
A plate-like holding member 72 is surrounded on the opposite side of the second clamp means 67 on which the housing 51 is provided, and is fixed to the holding member 72.
A pair of second mounting members 73 on which external threads are engraved
A third nut 75 is screwed into the external thread of the second mounting member 72 by inserting the bolt into the bolt insertion hole 38 of the second mounting member 72, and the insertion / ejection means 19 is detachably mounted on the housing 51. Connects the elongated body 21 to the first and second pipes 15,1.
A tube opening / closing device, which is inserted into the 67 or discharged from the first and second tubes 15,167.