FR2811738A1 - Safety system for coupling between a mains gas tap and flexible pipe comprises rigid sleeve and ring to prevent unauthorised dismantling - Google Patents

Abstract

The safety system consists of a rigid cylindrical sleeve (11) to cover the whole of a coupling nut between a flexible gas pipe and a mains tap, and a double circular threaded ring (1, 2) which prevents the nut between the tap and mains pipe being undone. The ring and sleeve are fixed in place by headless screws fitted in threaded holes (18, 19) and covered by seal strips.

Description

The present invention relates to a device for locking a pipe

  flexible on a gas stopcock, so that voluntary or accidental loosening is impossible except by a professional. This invention allows the establishment of a final safety connection for the supply of gas cooker, in rental housing. It also provides collective security, in buildings, when the owners take charge of all the work. The anti-theft aspect being a determining element for the owner. This invention is therefore an anti-theft device and a

  security system, anti-loosening therefore anti-gas leakage.

  This system is fixed, in particular, but not exclusively, on standard products, such as, gas and flexible shut-off valves with screwed ends which

supply the gas cookers.

  These gas taps and hoses are installed in each accommodation. Once the installation is complete, you must guarantee to its owner that the connection will neither be dismantled

  nor modified, inadvertently or maliciously.

  The invention therefore makes it possible to protect the connection zones, gas pipeline -

  shut-off valve and valve - flexible by preventing loosening of the assembly nuts. The invention consists of: - a double anti-loosening protection ring, fixed upstream of the valve

  stop, on the incoming side of natural network gas.

  - an anti-theft and locking protection ring, fixed downstream of the tap

  stop, flexible side supplying the gas stove.

  The double upstream ring is therefore composed of 2 parts. The first screw is screwed (clockwise) directly onto the thread of the standard gas tap, inlet side, in the

  manually blocking on the body of the gas tap.

  The 2nd is screwed (counterclockwise) on the 1st thanks to a left-hand thread. The 2 parts thus assembled constitute a ring totally protecting

  the connection nut, network pipe - gas tap.

  -2 - This double ring is cylindrical in shape, in machined brass. The joint plane of the 2 assembled parts, is largely covered by a very adhesive strip, which serves

  seal keeping the rings screwed together.

  The connection nut, fixing the gas valve on the pipe, being perfectly tight to ensure the tightness of the network, prohibits the disassembly of the double ring

  who protects and imprisons him. The upstream part of the valve is thus secured.

  To ensure downstream protection of the tap, and to prevent disassembly of the flexible hose, a cylindrical ring in machined brass protects the entire screwed nut of the hose as well as the metal crimping part of the hose, so as not to leave

  no rigid grip accessible to twisting and dismantling attempts.

  A notch on the top of the ring allows it to be brought closer to the body of the valve. Access to the nut is thus completely inaccessible from this side. The downstream ring is secured by 2 special headless screws mounted in 2 tapped holes opposite; these 2 screws ensure tightening by taking support on each side of the valve body, on the cylindrical part of the valve located

behind the thread.

  This swallow ring is thus integral with the valve, and protects from disassembly

  malicious, the valve-flexible connection nut.

  Thus kept in place in each accommodation, this gas-hose-flexible connection set, guarantees, among other things, to the owners of the premises, a long-term installation in accordance with the texts in force. The choice by the owner of a stainless steel hose meeting AFNOR NF D 36.121 standards, the lifetime of which is without limit of use, will make it possible with this invention

  to have a final installation, reassuring, and not modifiable by the tenants.

  Only qualified personnel, equipped with special tools, could

  disassemble these rings, if necessary.

  The ring swallows, moreover, is provided with an essential device, to prevent unintentional loosening, which could occur, by twisting the hose, either when the hose is tightened on the gas connection, or by displacement, for cleaning behind the stove 3- This anti-loosening device is provided by. 2 additional screws, without head, special, mounted in 2 tapped holes opposite in the downstream ring, at the level of the central part. These 2 screws thus tightened, taking support from 2 machining operations (13 mm on plates) existing as standard on all stainless steel hoses AFNOR standard NF D 36.121, allow the hose to rotate in rotation by

compared to the swallow ring.

  The ring swallows already secured to the tap with the first 2 screws, is

  also attached to the hose thanks to the 2 additional screws.

  All the grub screws are flush with the external surface of the downstream ring, which allows them to be completely covered by 2 adhesive strips, which

will serve as a seal.

  The tap-flexible assembly thus assembled by the downstream ring is completely

  locked and prohibited any voluntary or accidental loosening.

  In summary, the object of the present invention is: - To prevent theft, by a tenant, of the flexible pipe situated downstream of the gas stop valve, which flexible pipe would form an integral part of the heritage of an owner. - To prohibit the accidental loosening of the flexible hose in order to avoid any leakage of

  gas, at the connection downstream from the tap.

  - Protect from voluntary disassembly or impact, the upstream connection of the

  stop valve, preventing any dangerous leaks before the valve.

  - To allow the installation of an installation that complies with

security, in a lasting way.

  - Advantageously replace, the direct connections to the gas stove in rigid copper pipe, which prove to be too fragile in the event of disassembly or

  replacement of cooking plates.

  - To constitute a set of technical connection whose realization does not

  can only be entrusted to qualified professionals.

  - In general, to prevent anyone from modifying an installation without

comply with safety standards.

  - To allow the owners of collective dwellings, to set up collective security, which tenants cannot organize individually -4 - The attached drawings illustrate the invention:

  Figure 1 shows in section, the upstream double ring of the invention.

  Figure 2 shows in front and side view, the downstream ring of the invention Figure 3 shows in perspective the whole of the invention Figure 4 shows the arrangement of the invention in its environment. Figure 5 shows in section and in side view, the invention mounted with the

  commercial components, gas shut-off valve and flexible gas hose.

  With reference to these drawings, the device comprises a double upstream brass ring (see Fig. 1), the ring (1) of which has a left-hand thread (3), and is screwed onto the ring (2) by a left hand thread (4.) The ring (2) also has a right hand thread (5) in order to be screwed onto a thread upstream of the stop valve (6). disassembly of the gas shut-off valve (6) from the supply network pipe, the connection being ensured by a standard commercial connection (7), brazed on the copper supply piping and having a nut (8) at its end ) which allows the screwing of the

inlet side valve (upstream).

  The assembly order must therefore be as follows - Screwing (clockwise) of the ring (2) thanks to the thread not on the right (5) on

the tap (6) on the inlet side.

  - Present the ring (1) by passing it around the pipe (7).

put on hold.

  - Assembly of the pipe (7) thanks to the nut (8) by screwing on the tap (6) on the inlet side. The ring (2) is thus held captive by the nut (8). - Present the ring (1) to screw it (counterclockwise) on the ring (2)

by blocking it by hand.

  - Place a peripheral adhesive strip (9) in the wide groove provided for this purpose, in order to cover the junction plane (10) of the 2 rings. This adhesive tape has a sealing role and prohibits the loosening of the rings between

they.

  -5- The 2 rings (1) and (2) are thus joined together, but also

  integral with the valve-gas supply line connection.

  The nut (8) is thus completely protected, making malicious disassembly difficult. We distinguish in Fig.2, a downstream ring, cylindrical (11) in brass, which is intended to protect the entire end of the flexible pipe (20), that is, the nut (12) and the part metal crimping (13) of the hose This ring (11) is held on the valve body (6) on the outlet side (downstream),

  by 2 screws (14) without head, tightened in opposition in 2 tapped holes (18).

  The 2 screws (15) tightened in opposition in 2 tapped holes (19), take support on the 2 existing flats (16) on the hose (20) and thus lock the hose on the tap (6). All loosening by twisting of the hose is made impossible

  because the ring (11) secures the hose (20) and the valve (6).

  The screw heads (14) and (15) being flush with the rings, 2 adhesive labels (17) cover all of the screws, thus serving as a seal. The identity of

  owner being printed on these labels, for information to tenants.

  The present invention prohibits the dismantling and theft of the hose by the tenant, in

  rental housing, and eliminates all gas leaks, by the anti-principle

  loosening. This invention therefore constitutes a security system for

  connections to gas stoves supplied with natural gas.

  It goes without saying that technological variants of shapes or materials can be

  made to this invention, without departing from the scope of this invention.

-6-

Claims (2)

  1 Safety device for locking, a flexible stainless steel gas hose screwed onto a gas tap, characterized in that it comprises a rigid cylindrical ring (11) covering the entire screwing member of the flexible hose and the internal dimensions are slightly greater than the angle dimension of the hexagon of the nut (12) and a double ring (1) and (2) circular, rigid, assembled by screwing, and protecting from disassembly, the nut (8) of the   gas tap (6) and the gas network pipe.   2 Device according to claim 1 characterized in that the locking consists in using 2 screws (14) without head to immobilize the ring (11) on the valve body and 2 screws (15) without head to lock the ring (1) on the flexible gas pipe, taking support on the 2 plates (16) 3 o Device according to claim 1 or claim 2 characterized in that a notch (21) is formed on the top, in the extreme part of the ring (1i ) to allow it to press against the body of the gas valve 4 Device according to claim 1 characterized in that the double ring (1) and (2) is screwed directly onto the existing thread of the gas valve