SK116096A3 - Device for mounting the connecting part of feeder pipe or branch pipe on the underground pipeline - Google Patents

Abstract

Device for fixing the branch-pipe fitting (10) to the connection or branch on the underground tube (1) for distribution of liquid, from the surface of the ground in the access hole contains a basic construction comprising bearing mechanism aimed at placing under the tube (1) and establishing device (200) of the branch-pipe fitting, comprising hollow access shank (201), devices (220 to 226) for developing the pressure between branch-pipe fitting (10) and tube (1). The sealing, established between the hollow access shank (201) and branch-pipe fitting (10), and transit and closing feeders, established on the upper end of the hollow access shank (201), allow to introduce the drilling mechanism, fixing devices, closing devices and tap devices to the access shank without meeting liquid in the main tube and the outer surroundings.

Description

f ZI ·> ΟόΚ ý FITTING MOUNTING DEVICE FOR CONNECTION

OR DOUBLE / ON UNDERGROUND PIPES

Technical field

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a device for mounting a connection piece for a connection or branch on an underground conduit for the distribution of a fluid, in particular a gas distribution conduit from the ground surface. The fitting of this connection piece around the pipe allows an access pit.

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As is evident, the aim of the solution is to act from the area above the ground surface (terrain) on the pipelines led under the ground. The terms upper and lower in the following description should therefore be understood in the vertical direction.

BACKGROUND OF THE INVENTION

When connections or branches on existing underground pipelines for the transport and / or distribution of fluid such as gas are to be planted, an access pit will be formed. In order to reduce the problems caused by pedestrian traffic or traffic, negative environmental impacts and the cost of constructing an access pit, efforts are made to reduce its dimensions. If this pit has, if desired, a side size of about 40 cm, it is not possible for the worker to descend to the bottom of the pit to fit the connection piece directly. It is therefore necessary to use specific equipment allowing work from ground level. '

Joint fitting devices are already known for pipe connections or branches, in particular from FR-A-2 648 538, FR-A-2 620 649 or FR-A2 714 710. In particular, the last of the documents discloses a fitting fitting for a connection or branch on an underground fluid distribution pipeline, from the ground surface, where the access pit allows the connection piece to be fitted around the pipeline, the apparatus comprising a base structure having an upper and a lower portion and comprising a first vertical support frame provided with slide guides; feet, releasably fastened to the top of the frame, and a support mechanism mounted at the bottom of the frame and intended to be placed under the duct; further comprising a mounting member mounting means comprising a hollow access rod

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I having the same upper part and lower part, a releasable fastening assembly comprising guide means, cooperating vertically with said guides

I of the base structure when introducing the upper part of the base structure, means for temporarily holding the connector part mounted at the lower end of the access bar, means for applying pressure between the connector part and the pipe; further comprising additional first and second releasable fasteners, supported on the one hand by the base structure and on the other, by the mounting means of the mounting means and interacting with each other to fasten the base part and the mounting means of the mounting means; the mechanism for

Drilling of pipes; a third fastening means for tightly fixing the connector to the pipe; the closure means of the connector; Finally, plug means for closing the connector.

However, the apparatus described therein is primarily intended for the fitting and solid connection of a connection piece and a pipe of a thermofusible material such as polyethylene. Within the scope of the invention, it is intended to work on pipes, preferably made of steel or cast iron, but also with the possibility of payment for polyethylene. The conditions of assembly and branching are so different from those described in FR-A-2 714 710, and the apparatus according to the invention will accordingly also differ substantially.

It is therefore an object of the present invention to provide a simpler solution which makes it possible to work more flexibly while ensuring maximum safety. In particular, an attempt is made to get rid of a work restriction requiring a branch to be fixed prior to forming a pipe opening and, more particularly, to the functional limitations that FR-A-2 714 710 entails.

SUMMARY OF THE INVENTION

It is an object of the invention that the apparatus of the above type further comprises, at the bottom of the access rod, sealing means between the access rod and the connector for maintaining tightness between the access rod and the connector; to the access rod in its axial extension to allow introduction of the drilling mechanism, the third fastening means, and the plug means through the upper end of the access rod without the fluid circulating in the main conduit being in communication with the external environment. This solution provides the device with tightness to the fluid circulating in the pipeline, and it is thus still possible to use a method that entails less technological constraints when tapping. ^!

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Another feature of the invention is directed to providing a simple connection between the connection piece and the access bar. For this purpose, the resources shall be temporary

Also, the retaining of the connector comprises an internal thread formed at the lower end of the access rod and intended to interact with an external thread formed on the connector and an annular seal housed within the internal thread. This method of screwing the connection piece onto the access rod is simple, it uses the connection piece threading and does not need to provide the lower part of the connection rod with an internal thread to hold firmly (without play) the branch. An annular seal ensuring the seal between the access bar and the connection piece completes the safety of the device.

Since the support mechanism must be located below the pipe, the device is engaged sideways so that all the holding means of the device are generally

I saved the console on the same side. However, such solutions are limited to the force level for holding the pipe connector. In the case of metal pipes, the forces to be developed for this purpose are relatively high. For this purpose, the invention proposes that the support mechanism comprises a shoe provided with rollers guided i

in two first annular guides (131a, 131b) operatively connected to the base structure, the support mechanism further being releasably connected to the base structure by means of rods disposed on both sides of the ducts. Fixing the tie rods on the same side as the rollers relative to the duct allows the base structure to be held in place until the base structure is fully seated by fixing the tie rods located on the other side.

As a rule, the steel or cast iron pipe is covered with a few millimeter protective layer of asphalt, which should be removed before fitting the connector so as to obtain a satisfactory connection, otherwise there would be a risk of the layer

It also compresses asphalt over time, resulting in subsequent leaks and leaks. Therefore, the apparatus further comprises a brushing mechanism comprising a second vertical support frame, guide means cooperating with said base structure guides, a motor and a rotating brush mounted on said engine for working contact with the pipe for stripping the protective asphalt layer.

It is also advantageous to take the asphalt down not only from the top of the pipe but also from the sides. For this purpose, the brushing device further comprises a rotatable assembly having the shape of a deformable parallelogram whose pivot axes are displaced in pairs in two second circular guides spaced axially apart and mounted on the second vertical support frame. When the axis of the second lower guide is brought into the pipe axis, a constant layer of asphalt is removed. .

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BRIEF DESCRIPTION OF THE DRAWINGS

The invention is explained in more detail in the following description by way of example with reference to the accompanying drawings, in which:

Fig. 1 is a cross-sectional view taken along the plane I-I of FIG. 2, FIG. 2 shows a front view of the basic structure, FIG. 3 is a view in the direction of arrow III of FIG. 2, FIG. 4 is a side view of the brush mechanism; FIG. 5 is a front view of the brush mechanism of FIG. 4, FIG. 6 is a section along line VI - VI in FIG. 5, FIG. 7 is a view of the mounting mechanism of the connector, FIG. 8 is a cross-sectional view of the mounting mechanism along the line VIII - VIII in FIG. 7, FIG. 9 is a section along line IX - IX in FIG. 8, FIG. 10 is an enlarged detail view of the pipe fitting; FIG. 11 is an enlarged detail of the through-and-end cap; FIG. 12 shows an enlarged detail of the drilling tool, FIG. 13 shows an enlarged detail of the third fastening means, FIG. 14 is an enlarged detail of the closure means, and FIG. 15 is an enlarged detail of the plug means.

EXAMPLES i

In FIG. 1 and 2, there is shown an embodiment of a basic structure (support fixture, stand - hereinafter basic structure) 100 having a first vertical support frame 110 comprising two parallel columns 111a, 111b connected by spacers 118a, 118b. This structure has a lower part, an intermediate part and an upper part. The frame has guides 112a, 112b, 113a, 113b, 114a and 114b of the sliding guide, fastened to the uprights 111a, 111b in the lower part, the intermediate part and the upper part. The upper slide guides 114a, 114b further have fixation means formed by locking pins 116 provided with a return spring 117, as shown in FIG. Third

At the top of the frame 110, two telescopic feet (e.g., four of which two are shown) 115a, 115b are mounted on each of the posts 111a, 111b to provide stabilization of the base structure 100 relative to the ground when the base structure 100 is mounted in the access pit. .

At the bottom of the first frame 110, the vertically adjustable arms 120a, 120b are displaceable relative to the columns 111a, 111b, to accommodate different pipe diameters, and are clampable by the knurled nuts 122a, 122b to lock their position. These arms are terminated at the bottom by first inverted V-shaped structures 124a, 124b intended to abut against the conduit.

The base structure 100 also includes a support mechanism 130 at the lower portion of the frame, comprising a shoe 134 provided with rollers 132a extending in the two first annular guides 131a, 131b. In each of the first annular guides 131a, 131b mounted on the uprights 111a and 111b, a pair of rollers 132a are moved. Only one pair of rollers 132a moving in the guide 131a is shown in cross section through the guide 131a. These pair of rollers are mounted on a shoe 134 having two V-shaped portions 136a, 136b intended to be received against the first V-shaped structures 124a, 124b. This assembly of the first and second V-shaped formations jaws, between i

by which the pipe 1 is laid, ensures an accurate and reliable connection with the pipe 1.

The movement of the coulter 134, slidable by the rollers 132a in the ring guides, is easily operated from the top of the access pit by a pair of handles 142 mounted on two rear linkage 140 attached at the bottom to said coulter 134. the rear tie rods 140 are fastened in the upper portion to the structure by means of a pair of T-shaped retaining portions 146a, 146b to improve conduit clamping conditions, i. In order to eliminate the cantilever arrangement, front bars 144, which are connected to the holding portions 146a, 146b, are disposed on the other side of the conduit relative to the rear tie rods 140. Said retaining portions 146a, 146b are vertically movable relative to the upright posts 111a, 111b by means of screws 148a, 148b. The gripping of the screws 148a, 148b causes pulling on the pull rod assembly 140, 144 and compression on the upright posts 111a, 111b, which impart this force through the V-shaped formations 136a, 136b, 124a, 124b further to clamp the conduit 7.

In FIG. 4, 5 and 6, a clear brush mechanism 400 comprising a second vertical support frame 401, a rotatable assembly 420, a motor 410, and a brush 412 mounted on the rotatable assembly 420 is provided. This brush mechanism is intended to receive the upper portion of the frame 100, held on one of the parallel posts 111a, 111b. The second frame 401, comprising two rods 402a, 402b connected to each other by a spacer 404 and two retaining discs 406, 408, is thus mounted around two slide guides 112a, 113a, 112b, 113b mounted on one of the parallel posts 111a, 111b in the middle its height and at the lower part thereof, while the disks 402, 403 are housed within said slide guides 112a, 113a, 112b, 113b on the frame 100.

In addition to the bars 402a, 402b, the spacers 404 and the two holding discs 406, 408, the second frame also comprises two circular second guides 414, 416 disposed in the same vertical plane. The pivot assembly is in the form of a first parallelogram whose pivot axes 421, 422, 423, 424 sliding in pairs in the second guides 414, 416 allow it to deform. Above the first parallelogram, a second parallelogram is constructed by extending the substantially vertical sides 425, 426.

The deformation of the rotary assembly 420 causes a movement that can be controlled at the top from the ground level by a control rod 427 mounted on one side of the other parallelogram. In this movement, the brush 412 moves around a circular arc around the duct as indicated by a double arrow 428. This movement is limited by an adjustable stop 414. The brush 412 is rotated about its own axis by a motor 410, preferably pneumatic, with compressed air being supplied by supply means The compressed air 430 and the pipe 432. The double movement of the brush 412 around its own axis and around the duct allows cleaning of the outer surface of the duct 7.

In FIG. 7, 8, 9 and 10, there is shown a connector 10 mounted on its mounting mechanism 200. The mounting mechanism comprises a hollow access rod 201 having an internal recess 202 along its entire length. The lower portion of this recess includes means for temporarily retaining the connector W , which here are formed by an internal thread 239 for screwing in the external thread 240 of the upper part of the connection piece 10. ΐ

This access rod 201 is further in contact with a fastening assembly 210 consisting of two rods 204a, 204b maintained with respect to the access rod 201 by two blocks, a lower block 206 and an upper block 208. Blocks 206, 208

I comprise guide means 212a, 212b, 214a, 214b, in this case a bolt head inserted into the lower and upper guides 112a, 112b, 114a, 114b 'of the base structure 100. The bolt heads 214a, 214b mounted on the upper block 208 are further The functional connection between the mounting assembly 210 and the guides 112a, 112b, 114a, 114b is completed by inserting the locking pins 116 of the base structure 100 into the holes 214a, 214b. Thus, the fastening assembly 210 is immobilized with respect to the base structure 100.

The upper block 208 is connected to the access rod 201 by an internally threaded and rotatable ring relative to the upper block 208. On this threaded ring 220 a fastener 222 is fastened by a screw 221 in a helical guide connection to the access rod 201 as a result of in the presence of a thread 226 formed on the outer surface of the access rod 201. The connector 222 has in its upper part pins 223 onto which the bell 224 is slid.

A first rotation locking means 230 is clamped around the access bar by means of a first lever 232, the locking means being mounted on one of the bars 204b so as to prevent rotation of the access bar 201 relative to the mounting assembly when the first lever 232 has been tightened.

When the upper part of the connector 10 is screwed into the thread 239 formed in the lower part of the inner recess 202, as shown in FIG. 7, 8 and

10, the second rotation lock member 242 closes at the access point. the rod 201 by means of the second lever 244. Now straddled on the branch 248 of the connector portion 10 of the fork 245, passing through said locking member 242, such that the connector portion 10 is immobilized with respect to the access rod 201. rotating the bell 224 by means of a square profile 225 mounted on the upper portion will cause the access bar 201 to move relative to the base structure 100 and allow a force to be applied between the seal 246 inserted into the connector 10 and the pipe 7 in which the fluid circulates.

At the bottom of the access rod 201, the annular seal 249 provides a seal between the connection piece 10 and the access rod 201, while it is understood that the branch 248 of the connection piece 10 is connected and is not left in the open air.

When the clamping force is exerted between the connection piece 10 and the pipe 1, the bell 224 is lowered by releasing it from the pins 223 and threaded on the upper end 228 of the access rod 201, screwing the through and closure extension 250 using its lower threaded part 252. . This pass-through and shut-off attachment system 250 shown in FIG. 11, can be used, for example, from

Also, the Piedfort model M 80. The passage and shut-off attachment 250 comprises a body 245, a shut-off valve with a shutter body 256 transversely movable as indicated by a double arrow 257 and a stopper 258 screwed on the top. A rod 260, provided with a square square 261 on the top, can pass through this stopper 258 to facilitate its operation. A flat or analogous seal 264 is inserted between the plug 258 and the body 254, while a tongue seal 262 is provided between the plug 258 and the rod 260 and an annular seal 266 is disposed in the groove at the end of the female thread 252. to access bar 201.

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In FIG. 12, an example of a drilling tool 270 is shown. This tool has a spindle 276, the lower end of which comprises a centering drill 272 and a bell saw i.

274, and the upper end of which corresponds to the shape of the spindle 260, the square portion of which allows to control the rotation of the drilling tool 270, in particular! using a pneumatic motor with a square sleeve. ;

The tool is mounted as follows. The closure member 256 introduces it into the

Even in the active closure position, the drilling tool 270 is inserted into the through and closure extension 250 after the plug 258 has been screwed into the body 254, after which the closure member 256 is retracted back to the open position. Drilling tool 270 is then lowered into contact with pipe 1. Turning this drilling tool 270 causes the wall of pipe 1 to be drilled. The fluid circulating in the pipe cannot escape due to the presence of a seal between pipe 1 and connector 10, between connector 10 and access rod 201, between the access rod 201 and the through-and-stop extension 250 and between the stop 258 of the through-and-stop extension 250 and the spindle 276 and the drilling tool 270.

The extraction of the drilling tool 270 is carried out in the order of the processes opposite to the setting. The fluid circulating in the pipe is never in contact with the environment when the drilling tool 270 is raised to the upper part, as the closure member 256 is brought into the active position before unscrewing of the closure cap 258. ¹

In FIG. 10 and 13, a third fastening means 280 is shown comprising a sleeve with an expandable housing 282 and axial projections 292 and within which a clamping wedge 284 having a widened lower conical end is screwed. By means of a storage tool 286 having a rod corresponding to the rod 260 at the top and pins 287 interacting with the slits 283 formed in the sleeve 282 at the top, the third fastening means 280 is inserted into the connector 10 in the same manner as the drilling tool 270 After the third fasteners 280 have been inserted into the connector 10, they are screwed into it by the thread 290 of the sleeve 282 and the internal thread 289 of the connector 1Ό shown in FIG. 6. The projections 292 are now inserted into the duct 1 through an opening formed by a drilling tool.

The insertion tool 286 is now withdrawn, and then the locking tool 288 is inserted with its projections 289 inserted into the slots 285 formed in the upper portion t of the chuck 284. Unscrewing the chuck 284 relative to the sleeve 282 causes the tabs 292 to expand relative to each other. the inside

I pipe side. The connection piece 10 is thus fixed to the pipe 1. [

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In FIG. 14, the closure means 300 is shown, comprising: a closure member 301 and a first setting tool 302, allowing the closure member 301 to be screwed onto the connector 10 via the thread 304 of the closure member 301 and the internal thread 306 of the connector 10 shown in FIG. 10. The tightness between the connection piece 10 and the closure member 301 is provided by a seal 308.

In FIG. 15, there are shown plug means 310 comprising an outer plug 311 with an internal thread 316 and a second setting tool 312 into which a ball 314 is mounted on a spring so as to hold the outer plug 311 in the second setting tool 312. Once the outer plug 311 is and a second setting tool 312 inserted into the access bar, the outer plug 311 is screwed onto the connector 10 by means of an internal thread 316 of the outer plug 311 and an external thread 240 of the connector 10 shown in FIG. 10. The seal is completed by placing the annular seal 318 on the end of the female thread, and the plug thus sealingly closes the connector 10 relative to the external environment.

Claims (5)

An apparatus for fitting a connection piece (10) for a connection or branch on an underground conduit (1) for distributing fluid from a ground surface, wherein the access pit allows mounting of the connection piece (10) around the conduit, the apparatus comprising a base structure (100) having an upper and a lower portion and comprising a first vertical support frame (110), provided with slide guides (112a, 112b, 113a, 113b, 114a, 114b), a leg assembly (115a, 115b), movably mounted on the upper frame (110) and a support mechanism (130) mounted at the bottom of the frame and intended to be placed under the conduit (1); further comprising a mounting member mounting means (200) comprising a hollow access rod (201) having also an upper and a lower portion, a releasable fastening assembly (210) comprising guide means (212a, 212b, 214a, 214b) co-operating vertically with said guides (112a, 12b, 114a, 114b) of the base structure for introducing the upper part of the base structure, means for temporarily retaining (239, 240) the connector (10) mounted at the lower end of the access bar (201), means (220, 221, 222, 223, 224, 225, 226) for applying pressure between the connecting piece (10) and the pipe (1); further comprising complementary first (116, 117) and second (214a, 214b) releasable fasteners, supported both by the base structure (100) and the fastener assembly (210) of the mounting means (200) and interacting with each other to secure the base member (100) together and a mounting means (210) of the mounting means (200); a pipe boring mechanism (270); further, third fastening means (280) for tightly attaching the connector (10) to the conduit (1); further, the closure means (300) of the connector (10); and stopper means (310) for closing the connector (10), characterized in that the device further comprises at the bottom of the access rod (201), sealing means (249) between the access rod (201) and the connector (10) for maintaining a tightness between the access bar (201) and the connector (10), and at the top of the access bar a tubular through and lock extension (250) detachably secured to the access bar (201) in its axial extension to allow The introduction of the drilling mechanism (270), the third fastening means (280), X / stop means (300) and stopper means (310) at the upper end of the access rod without the fluid circulating in the main conduit being in communication with the external environment. Device according to claim 1, characterized in that the means for temporarily holding the connection part (10) comprise an internal thread (239) formed at the lower end of the access rod (201) and intended to cooperate with the external thread (240) formed on the a connection piece (10), and an annular seal (249) housed inside the female thread (239). Apparatus according to claim 1 or 2, characterized in that the support mechanism (130) comprises a shoe (134) provided with rollers (132a) guided in two first annular guides (131a, 131b) operatively connected to the base structure (100). ), wherein the support mechanism is further releasably connected to the base structure (100) by rods (140, 144) located on both sides of the pipe (1). ¹ The device according to at least one of claims 1 to 3, further comprising a brushing mechanism (400) comprising a second vertical support frame (401), guiding means interacting with said guides of the base structure (100), a motor (410) and a rotating brush (412) mounted on said motor I (410), for working contact with pipe (1). The apparatus of claim 4, wherein the brushing mechanism further comprises a pivot assembly (420) having the shape of a deformable parallelogram whose pivot axes are displaced in pairs in two second circular guides spaced axially apart and secured to the other. vertical support frame (401).