FR2487789A1 - Pressurisable reservoir for injecting sealant into cable joints - is pref. made of plastics or incorporates flexible bladder - Google Patents

Abstract

Portable appts. for injecting a fluid (8) under pressure into a sealed cavity (2) has a reservoir (9) which can be pressurised by an external pump (20) which pressurises the contents either directly or via an ancillary flexible bladder. The pressure may be generated by a tyre pump or prefilled gas bottle. The liq. may be discharged via a dip pipe (14) or, where an internal bladder is used, via an overhead outlet. Pref. the reservoir incorporates a relief valve (12) and a pressure control valve (11). Opt. the reservoir has a diaphragm across the inlet and/or outlet and/or between an internal bladder (prior to use) and the contents. The reservoir may be made of any material of adequate strength, e.g. iron, steel, aluminium, polyethylene, polyamide, fibre reinforced resin or polycarbonate. Suitable for injection thermosetting sealants or cements into sleeved joints in telecommunications cables, junction boxes etc. without exposing the reagents to atmosphere.

Description

The present invention relates to injection devices and, more

  particularly a combined device

  injection and autonomous and portable storage.

  The use of injected agents is spreading more and more in many technical fields. From this

  done, for the sake of simplification of work, we meet

  now be injection methods using portable tools. Mention may thus be made of hand pumps, of the grease pump type, which compress a sachet containing products to be injected, ratchet hand pumps allowing

  to crush and push the bottom of a tube filled with a material

  pasty riau, for example a sealant, or

  roller wringers coming to wring a rod of ma-

  to be injected. Pumps of the first type are subject

  to the permanent risks of puncturing of the sachets in the pump

  eg, causing pollution of the latter as well as of the hands of the manipulator, the other pumps being frequently confronted with implementation difficulties and bursting of the tubes or tubes. In addition, in winter, the material to be injected is generally more viscous, a significant physical effort is then required from the operator. The object of the present invention is precisely to overcome these drawbacks by proposing simple equipment 2.

  and effective universal and easy to use, allowing

  perform the injection quickly and without significant effort, in situ

  tion under pressure of liquid, pasty or gaseous products, protected from any projection and avoiding any pollution if the products to be injected are dangerous. According to a characteristic of the present invention,

  these objects are achieved by providing a container of sto-

  ckage and injection of the products to be injected, constituting

  normally the container of the injection product but should

  nant, in situ, the injection tool, this container being event-

  disposable or recoverable for a new use

station.

  More specifically, the storage system

  autonomous injection and rtb! e according to the present invention

  tion includes a structure of:> individual storage container

  duel defining an internal cantor to contain a sub-

  tance to be injected and a first means of connecting the container structure to a nozzle for injecting the object to be filled or impregnated, the container structure comprising

  a second means of connection to a general portable unit

pressure.

  The device according to the present invention makes it possible in particular to fill the junction and branch boxes

  on power cables requiring a flow of thermal material

  modifiable, following a non-contact and odorless injection process, injecting thermosetting resins into a fibrous or cellular complex to provide protection for junction or bypass splices which are the subject of French patent application n 80 / 16439

  on behalf of the plaintiff, to make water-tight caps

  protection on telecommunication cables, electronic protection

  connection cables on power cables, as well as taps on telephone cables with a large number of pairs.

  Other features and advantages of the pre-

  invention will emerge from the following description of

  embodiments given by way of illustration but null-

  3. limiting, made in relation to the accompanying drawings in which:

  FIG. 1 represents a first embodiment

  tion of the storage and injection device according to the pre-

  invention, of the type with a reusable container with a lid; Figures 2 and 3 show other alternative embodiments of containers with integrated pneumatic chamber; and FIG. 4 represents a compact variant and

  disposable from the storage and injection device according to the-

present invention.

  As mentioned above and shown in the

  sins on which the same reference numbers indicate identical or similar elements, the

  storage and injection according to the present invention is par-

  specially designed, although of course not limited to

  ve, to make junctions or branch protections

  tions 1 which is the subject of French patent application no. 80/16439 and which consists in injecting, for example a resin

  polyester, in a 2-layer impregnation support layer

  between an internal barrier layer and an external barrier layer 3 arranged around a junction or branch splice between two 4.4 'cables, via an injection nozzle

  with valve 5 provided for this purpose in the outer barrier layer

  ne 3. The storage and injection device comprises a container structure 6 defining an internal chamber 7 for the prolonged storage of a liquid, gaseous substance

  or paster 8 to be injected through nozzle 5 into object 1 to be replaced

  crease. The container structure 6 is determined to support

  ter enough internal pressure to allow injection

  tion of the stored product and can have all forms

  compatible with the best use for the operator and the best quality of storage of the products to be injected. It can be carried out using all existing materials, compatible with the injection products to be stored and with the internal pressure required for injection as a function of 4. the viscosity of the products to be injected, for example iron

  white, in stamped aluminum, in steel protected or not, in ma-

  plastic, low or high density polyethylene or

  in polyamides in particular, or in laminated materials

  bres and thermosetting resins, or in polycarbonate. In a preferred embodiment, at least part 9 of the wall defining the storage chamber 7 is made of a translucent or transparent material for

  allow the level of the contents of the container to be observed.

  In the embodiment of FIG. 1, the re-

  container 6, reusable, is removably and sealingly closed by a cover 10 carrying an inlet nozzle

  check valve 11 pressurization valve

  overpressure safety2 and / or a control manometer 13, all communicating with the internal chamber 7. The cover

  is crossed by a tube 14 extending to the vehicle

  sinking of the bottom of the chamber 7 and comprising, at its extremi-

  external tee, a connecting device, for example

  rapid, 15 to a pipe or tube 16 connected to the bu-

  se injection 5, and, at its other end, a strainer 17.

  In the embodiment of Figure 2, the

  container structure 6 has, for example, at its end

  upper part, a connection device 15 to the tube

  injection 16, the internal material storage chamber 7

  injection line 8 being separated from a second chamber formed

  mant double bottom 18 by a membrane 19 so that, in contrast

  stringing a pressure generating device 20 to the nozzle

  inlet valve 11 formed in the double bottom 18, the membrane

  does not deform and lengthen, as shown in dotted lines, no-

  especially in 19 ', to expel the product 8 through the tube 16 and

  inject it into the object to be filled 1.

  In the embodiment of FIG. 3, the container structure 6 is also provided with a second double chamber 18 ′ but separated, here, from the internal storage chamber 7 by a tearable separation membrane 21. In the double bottom 18 ', and connected to the nozzle

  pressurization inlet 11, is arranged a gonad bladder

  5. reliable expandable 22 which, when a fluid under pressure is introduced therein by the pressure generator 20, swells, tears the membrane 21, and pushes the product to be injected 8

  in the tube 16 towards the object 1 to be filled or impregnated.

  In the embodiment of Figure 4, the container structure 6 containing the product to be injected 8 comprises, at its two opposite ends, two plugs with piercing capsule 110 and 150, respectively. The outlet plug 150 is screwed and pierced on an injection inlet valve 5 'provided on the object to be filled 1, the other pressurization inlet plug 110 receiving, by screwing and drilling, a refill individual 23 of gas or liquid air to expel the product 8 and inject it into

the object to be completed 1.

  In the embodiments of FIGS. 1 to 3,

  any general autonomous instrument can be used

  pressurized fluid and preferably a hand pump for inflating velocipeds, a

  foot pump for inflating tires, bottles

  the compressed air or gas or compressed air capsule (s)

  award-winning, or portable compressors.

  Although the present invention has been described in relation to particular embodiments, it

  is not limited but is on the contrary susceptible

  ble of modifications and variants which will appear

one skilled in the art.

6.

Claims (12)

  1 - Self-contained storage and injection device   me and portable, comprising a storage container structure defining an internal space for containing a substance to be injected, and a first connection means   from the container structure to a dinjecion nozzle, charac-   characterized in that the container structure (6, 10) comprises   a second connection means (11; 110) to a unit   pressure generating table (20, 23).   2 - Device according to claim i, character-   in that the second connection means (11) is fitted with a non-return valve.   3 - Device according to claim 1 or the re-   vendication 2, characterized in that the second means of   cord (11; 110) communicates with the internal chamber (7).   4 - Device according to any one of the res-   dications 1 and 2, characterized in that the container structure (6) contains an inflatable structure (18} 220) with which the second connection means communicates (11).   - Device according to claim 4, character-   in that the container structure (6) comprises a   second chamber (18) separated from the internal chamber by a deformable king (19).   6 - Device according to claim 4, character-   risé in that the container structure (6) comprises a second chamber (18 ') separated from the internal chamber (7) by   a tearable wall (21) and enclosing an exten- sible (22).   7 - Device according to any one of the res-   dications previous, characterized in that the container structure (6, 10) comprises a cover (10) capable of being mounted in a sealed and removable manner on the body (6) of the container.   8 - Device according to any one of the res-   dications previous, characterized in that the first connection means (15) is provided at one end of a 7. dip tube (14) extending in the internal chamber (7) and   comprising at its other end a strainer 17.   9 - Device according to any one of the res-   dications previous, characterized in that the container structure (6, 10) comprises a discharge valve and security (12).   - Device according to any one of the res-   previous indications, characterized in that the structure   container (6, 10) comprises a control pressure gauge (13).   11 - Device according to any one of the res-   previous indications, characterized in that the first   connection means (150) is a capsule cap with a cer.   12 - Device according to any one of the res-   previous indications, characterized in that the general unit   pressure scaler is a hand or foot pump (20).   13 - Device according to any one of the res-   above, characterized in that the container structure (6, 10) comprises at least one wall portion   (9), defining the internal chamber (7) made of a ma- translucent material.   14 - Device according to any one of the res-   previous indications, characterized in that the general unit   pressure washer is a pressurized gas cartridge (23).   - Device according to claim 14, charac-   terized in that the second connection means (110) is a capsule cap to be pierced.