FR2476268A1 - Cramping frame for gas pipe maintenance - uses two clamps with screw jacks to put joint in compression during replacement of joint nut - Google Patents
Cramping frame for gas pipe maintenance - uses two clamps with screw jacks to put joint in compression during replacement of joint nut Download PDFInfo
- Publication number
- FR2476268A1 FR2476268A1 FR8003345A FR8003345A FR2476268A1 FR 2476268 A1 FR2476268 A1 FR 2476268A1 FR 8003345 A FR8003345 A FR 8003345A FR 8003345 A FR8003345 A FR 8003345A FR 2476268 A1 FR2476268 A1 FR 2476268A1
- Authority
- FR
- France
- Prior art keywords
- nut
- repair
- joint
- clamping
- jaws
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/18—Appliances for use in repairing pipes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
- F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
- F16L19/0231—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member with specially adapted means for positioning the threaded member behind the collar
Abstract
Description
La présente invention a pour objet, à titre de produit industriel nouveau, un procédé et un dispositif permettant de remplacer, rapidement et en charge, un écrou prisonnier, principalement sur une installation de fluide, plus particulièrement sur un réseau de transport ou de distribution de gaz. The subject of the present invention is, as a new industrial product, a method and a device making it possible to replace, quickly and under load, a captive nut, mainly on a fluid installation, more particularly on a transport or distribution network of gas.
Les principales méthodes connues pour le remplacement d'un écrou prisonnier sont généralement peu pratiques, longues et onéreuses ; on procède au remplacement de la douille qui emprisonne ledit écrou. Cette douille comporte, à l'extrémité opposée de la partie à souder, un collet ou épaulement servant de surface d'étanchéité et emprisonnant l'écrou. The main known methods for replacing a captive nut are generally impractical, time consuming and expensive; the socket is replaced which traps said nut. This socket comprises, at the opposite end of the part to be welded, a collar or shoulder serving as a sealing surface and trapping the nut.
Cette méthode implique, obligatoirement, l'arrêt gênant de la distribution du fluide et la mise en oeuvre de soude-brasures. This method necessarily involves the annoying cessation of the distribution of the fluid and the use of solder soda.
On peut aussi étancher une fuite de fluide, due à un écrou prisonnier détérioré, sans démontage et sans soudo-brasures par un moyen externe à l'aide d'une bande adhésive ou autre colmatage. Cette réparation, d'un caractère provisoire, ne présente pas la sécurité requise sur des installations à pression élevée. It is also possible to seal a fluid leak, due to a damaged captive nut, without disassembly and without soldering by external means using an adhesive tape or other clogging. This repair, of a provisional nature, does not provide the safety required on high pressure installations.
La présente invention a pour but d'éviter les inconvénients ci-dessus décrits et de permettre le remplacement en charge d'un écrou prisonnier, détérioré par un écrou de réparation, sans dégagement de fluide et sans en interrompre sa distribution, sans détérioration des conduits et sans emploi de chalumeau, donc en toute sécurité ; ce qui est remarquable, par exemple, dans la réparation des branchements individuels ou collectifs de distribution de gaz chez les abonnés. The object of the present invention is to avoid the drawbacks described above and to allow the replacement under load of a captive nut, damaged by a repair nut, without release of fluid and without interrupting its distribution, without deterioration of the conduits. and without the use of a blowtorch, therefore safely; which is remarkable, for example, in the repair of individual or collective gas distribution connections among subscribers.
La description, ci-après, se rapporte à un exemple de réalisation avec références aux dessins annexés dans lesquels la figure 1 est une vue de face d'une partie de conduite de distribution de gaz 4 et 5 dont l'écrou prisonnier à remplacer 1 suite à une fissuration 2, se trouve en amont du robinet 3. The description below relates to an exemplary embodiment with reference to the accompanying drawings in which FIG. 1 is a front view of a part of the gas distribution pipe 4 and 5, the captive nut of which is to be replaced 1 following cracking 2, is located upstream of valve 3.
La figure 2 est une vue en perspective du dispositif revendiqué. Figure 2 is a perspective view of the claimed device.
Ce dispositif se compose essentiellement d'un élément de maintien ou étrier composé des pièces 6 - 7 - 8 - 9 et 12 et d'un écrou de réparation composé de deux demi-parties 10 assemblées entre elles par les vis Il. This device essentially consists of a holding element or stirrup made up of parts 6 - 7 - 8 - 9 and 12 and a repair nut made up of two half-parts 10 assembled together by screws II.
La figure 3 est une vue de face après la mise en place de l'écrou de
réparation et avant la dépose définitive de l'étrier.Figure 3 is a front view after the installation of the nut
repair and before final removal of the caliper.
En se rapportant aux dessins annexés, pour remplacer l'écrou 1,fissuré et
prisonnier sur la tuyauterie 4, on met en place l'étrier selon la figure 3.Referring to the accompanying drawings, to replace nut 1, cracked and
prisoner on the piping 4, we put the stirrup in place according to figure 3.
Cet étrier se compose de deux paires de mâchoires de serrage 8 munies de
presses 6 commandées par les vis de serrage 7. L'usinage particulier de ces mâchoires formé un V 13 servant à autocentrer l'étrier dans l'alignement des tuyauteries aval 4 et amont 5 par rapport au robinet 3. Ces mâchoires sont réunies entre elles par des tiges de bridage 9. This stirrup consists of two pairs of clamping jaws 8 provided with
presses 6 controlled by the clamping screws 7. The particular machining of these jaws forms a V 13 used to center the caliper in alignment with the downstream 4 and upstream 5 pipes with respect to the valve 3. These jaws are joined together by clamping rods 9.
Dans cet exemple de réalisation, ces tiges de bridage sont de simples tiges filetées munies d'écrous 12 rendant la fabrication et l'emploi de l'étrier économique et sûr. In this embodiment, these clamping rods are simple threaded rods provided with nuts 12 making the manufacture and use of the stirrup economical and safe.
Pour le remplacement en charge d'un écrou prisonnier 1 sans interrompre l'écoulement du fluide, il suffit après avoir mis en place l'étrier ci-dessus décrit, de dévisser ou de finir d'éclater cet écrou. For the replacement under load of a captive nut 1 without interrupting the flow of the fluid, it is sufficient after having put in place the bracket described above, to unscrew or finish bursting this nut.
Après la mise en place de cet étrier et le blocage des presses 6 par les vis 7 dans les mâchoires 8, on règle la force du bridage souhaité par rotation des écrous 12 ; de cet ensemble bien rigide, on peut, sans danger, extraire l'écrou défaillant 1 par éclatement, cisaillement, sciage par exemple ou simplement par desserrage suffisant. Dans ce cas, l'écrou défaillant reste abandonné sur la tuyauterie. On pose ensuite un écrou de réparation 10. Cet écrou de réparation se compose de deux demi-écrous assemblés entre eux par un moyen mécanique ; dans cet exemple de réalisation il s'agit de deux boulons tête ronde 11. Dans le but de loger ces deux boulons, un des deux demi-écrous est pourvu d'un taraudage et l'autre demiécrou d'un fraisage noyant la tête.Une fois assemblé, cet écrou de réparatien présente, à sa partie intérieure, sensiblement les mêmes dimensions qu'un écrou ordinairement utilisé en tuyauterie ; seule, la partie extérieure diffère mais ne provoque pas d'inconvénient majeur pour sa manoeuvre. After the installation of this stirrup and the blocking of the presses 6 by the screws 7 in the jaws 8, the desired clamping force is adjusted by rotation of the nuts 12; from this very rigid assembly, it is safe to extract the faulty nut 1 by bursting, shearing, sawing for example or simply by sufficient loosening. In this case, the failed nut remains abandoned on the piping. A repair nut 10 is then placed. This repair nut consists of two half-nuts assembled together by mechanical means; in this exemplary embodiment, these are two round head bolts 11. In order to accommodate these two bolts, one of the two half-nuts is provided with a tapping and the other half-nut with a milling drowning the head. Once assembled, this repair nut has, at its inner part, substantially the same dimensions as a nut ordinarily used in piping; only, the external part differs but does not cause any major inconvenience for its operation.
En outre, les performances mécaniques sont au moins égales ou supérieures à un écrou normal souvent fabriqué en très grandes séries et pourvu de parois très amincies par souci d'économie. In addition, the mechanical performance is at least equal to or greater than a normal nut often manufactured in very large series and provided with very thinned walls for the sake of economy.
Après la pose et le serrage de cet écrou de réparation, on dépose l'étrier devenu inutile par simple desserrage des mâchoires. After the fixing and tightening of this repair nut, the stirrup which has become unnecessary is removed by simply loosening the jaws.
Cet étrier, de conception simple et efficace, permet de très nombreux remplacements, en charge, d'écrous prisonniers sur des tuyauteries de diamètre et de matière différents et le prix de revient d'un écrou de réparatien, décrit dans la présente invention, reste dérisoire par rapport aux méthodes connues et employées. This bracket, simple and effective design, allows many replacements, loaded, captive nuts on pipes of different diameter and material and the cost price of a repair nut, described in the present invention, remains paltry compared to known and used methods.
Dans d'autres cas, on peut également poser un écrou de réparation sans l'aide de l'étrier. In other cases, you can also install a repair nut without the help of the bracket.
Bien entendu, l'invention n'est pas limitée à l'exemple de réalisation, ci-dessus décrit et présenté, à partir duquel on pourra prévoir d'autres modes et d'autres formes de réalisation, sans pour cela sortir du cadre de l'invention. Of course, the invention is not limited to the embodiment, described above and presented, from which other modes and other embodiments can be provided, without thereby departing from the scope of the invention.
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8003345A FR2476268A1 (en) | 1980-02-15 | 1980-02-15 | Cramping frame for gas pipe maintenance - uses two clamps with screw jacks to put joint in compression during replacement of joint nut |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8003345A FR2476268A1 (en) | 1980-02-15 | 1980-02-15 | Cramping frame for gas pipe maintenance - uses two clamps with screw jacks to put joint in compression during replacement of joint nut |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2476268A1 true FR2476268A1 (en) | 1981-08-21 |
FR2476268B1 FR2476268B1 (en) | 1982-06-25 |
Family
ID=9238613
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8003345A Granted FR2476268A1 (en) | 1980-02-15 | 1980-02-15 | Cramping frame for gas pipe maintenance - uses two clamps with screw jacks to put joint in compression during replacement of joint nut |
Country Status (1)
Country | Link |
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FR (1) | FR2476268A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0505124A1 (en) * | 1991-03-19 | 1992-09-23 | British Gas plc | Pipe restraint method |
AU759664B2 (en) * | 2000-02-22 | 2003-04-17 | Water Corporation, The | A clamping device |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1638482A (en) * | 1926-02-04 | 1927-08-09 | John W French | Collar leak clamp |
US2010678A (en) * | 1934-04-05 | 1935-08-06 | Garnet W Mckee | Meter connecting device |
US2651329A (en) * | 1949-05-13 | 1953-09-08 | Jr James G Fowler | Repair clamp structure and method |
FR1206230A (en) * | 1958-06-05 | 1960-02-08 | two-piece nut | |
US3181896A (en) * | 1962-10-24 | 1965-05-04 | Clifford M Russell | Coupling nut |
FR2089697A5 (en) * | 1970-04-28 | 1972-01-07 | Hawle Erwin | |
DE2403304A1 (en) * | 1974-01-24 | 1975-08-07 | Stadtwerke Krefeld Ag | Fitting for water meter - for its insertion between inlet and outlet pipes has supporting plate with connection for meter |
-
1980
- 1980-02-15 FR FR8003345A patent/FR2476268A1/en active Granted
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1638482A (en) * | 1926-02-04 | 1927-08-09 | John W French | Collar leak clamp |
US2010678A (en) * | 1934-04-05 | 1935-08-06 | Garnet W Mckee | Meter connecting device |
US2651329A (en) * | 1949-05-13 | 1953-09-08 | Jr James G Fowler | Repair clamp structure and method |
FR1206230A (en) * | 1958-06-05 | 1960-02-08 | two-piece nut | |
US3181896A (en) * | 1962-10-24 | 1965-05-04 | Clifford M Russell | Coupling nut |
FR2089697A5 (en) * | 1970-04-28 | 1972-01-07 | Hawle Erwin | |
DE2403304A1 (en) * | 1974-01-24 | 1975-08-07 | Stadtwerke Krefeld Ag | Fitting for water meter - for its insertion between inlet and outlet pipes has supporting plate with connection for meter |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0505124A1 (en) * | 1991-03-19 | 1992-09-23 | British Gas plc | Pipe restraint method |
US5249786A (en) * | 1991-03-19 | 1993-10-05 | British Gas Plc | Pipe restraint system |
AU759664B2 (en) * | 2000-02-22 | 2003-04-17 | Water Corporation, The | A clamping device |
Also Published As
Publication number | Publication date |
---|---|
FR2476268B1 (en) | 1982-06-25 |
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ST | Notification of lapse |