FR2763110A1 - METHOD FOR SEALING A SPACE BETWEEN AN ANNULAR WALL AND THE END PART OF A PIPE - Google Patents

Abstract

This method seals the space between an annular wall (30) which defines an opening (32) and the end part (38, 42) of a pipe introduced into this opening by placing a sleeve between them. sealing (2) made of elastic material such as rubber. This sleeve has an interior surface and an exterior surface, one of which (4) is smooth and the other (10) of which has at least one sealing protrusion (20) which extends peripherally. The same sleeve is used when connecting to the annular wall a pipe end portion having a substantially smooth outer surface, and when connecting to the annular wall a pipe end portion (42) having an outer surface which does not is not smooth, for example an outer surface with peripherally extending moldings (44).

Description

276,311.0

  Method for sealing a space between an annular wall

  and the end portion of a pipe.

  The present invention relates to a method of sealing a space between an annular wall which defines an opening and the

  end part of a pipe introduced into this opening.

  When connecting the end portion of a pipe to an opening in the wall of a concrete pipe or a hole collar

  concrete man for example, this opening extending transversely

  In relation to the axis of the pipe or the manhole collar, a sleeve is usually used made of an elastic material such as rubber. The compressed sleeve is placed in the space between the annular wall which defines the opening in the pipe or in the manhole collar and the outer surface of the end portion

  of the hose, and it wears tightly on its outer surface

  higher on the annular wall and, at its inner surface, on the outer surface of the end portion of the pipe. Depending on the configuration of the outer surface of the end of the pipe, different types of sealing sleeves must be used to seal the end of the pipe to the annular wall which defines the opening in the pipe. or in the manhole necklace. If an end portion of a pipe having a smooth outer surface is to be connected to the opening of the pipe or manhole collar, it is necessary that the surface of the sealing sleeve coming into contact with the surface Outer of the end portion of the pipe has one or more sealing protrusions which extend peripherally, in the form of sealing lips or the like. However, if an end portion of a pipe which has peripherally extending moldings or any other end portion of a pipe which is not smooth must be connected to the opening of the pipe or manhole collar, it is not possible to use a sealing sleeve having an inner surface which comes into contact with the outer surface of the end portion of the pipe and which has sealing protrusions or similar. On the contrary, it is then necessary to use a sealing sleeve having a smooth interior surface. In addition to this, it is necessary that the sealing sleeve has at least one surface, its inner surface or its outer surface, sealing protrusions because a massive sealing sleeve which has a smooth inner surface and also a smooth outer surface is not sufficiently capable of absorbing the dimensional variations of the space between the annular wall defining the opening in the pipe or the manhole collar and the end portion of the pipe introduced into this opening. It is of course disadvantageous to have to use different types of sealing sleeves to connect pipe end parts of different types, since this is a drawback from the storage point of view but also taking into account the risk of using the wrong sealing sleeve for a

  pipe end part of a certain type.

  The object of the present invention is to provide a method of sealing a space between an annular wall which defines an opening and the end part of a pipe introduced into this opening, in which it is possible to use a single sealing sleeve, whether the end portion of the pipe has a smooth outer surface or a non-smooth outer surface, which for example has moldings extending peripherally, this sealing sleeve having a surface interior and an exterior surface, one of which is substantially smooth and the other of which is provided with at least

  a sealing protrusion which extends peripherally.

  To satisfy this object, the process of the invention is charac-

  characterized in that the sealing sleeve is arranged with its surface provided with at least one sealing protrusion which extends so

  device turned inwards, in contact with the end part

  mite of the pipe, and with its substantially smooth surface facing outwards, in contact with the annular wall, when the sleeve is to be used to connect to the annular wall the end portion of a pipe having a substantially smooth external surface , and in that the sealing sleeve is arranged with its substantially smooth surface facing inwards, in contact with the end part of the pipe, and its surface comprising at least one sealing protuberance which extends from peripherally turned outwards, in contact with the annular wall, when the sealing sleeve is to be used to connect to the annular wall the end part of a pipe having an outer surface which is not smooth, for example a surface

  exterior with peripherally extending moldings.

  Therefore, the method of the invention makes it possible to use a single sealing sleeve for different types of pipe end parts, by fitting the sealing sleeve in the most favorable manner taking into account the configuration of the end part

of the pipe.

  When connecting an end portion of a pipe which has a substantially smooth outer surface to an opening in a pipe or a manhole collar, the sealing sleeve should be initially placed with its substantially smooth surface facing outward, in contact with the annular wall, and the end portion of the pipe having a substantially smooth outer surface is then pressed into the sealing sleeve until it comes into contact with the facing surface interior and with at least

  a sealing protrusion which extends peripherally.

  Thus, the end portion of the pipe and / or the sealing sleeve can be coated with lubricant before the end portion of the pipe is introduced into the sealing sleeve, in contact with the surface provided with at least least one protrusion extending peripherally. When you connect an end part of a pipe that has

  an outer surface with moldings extending perimeter

  seal, the sealing sleeve, with its sensitive surface

  smoothly turned inward, be placed in contact with the outer surface of the end portion of the pipe and the end portion of the pipe on which the sealing sleeve is placed is then introduced into the defined opening by the annular wall, the outer surface of the sealing sleeve which comprises at least one protuberance extending peripherally being in contact with the annular wall. In the case where the end portion of the pipe has several protrusions or moldings extending peripherally, one or more sealing rings, for example two sealing rings, should be placed between the moldings of the end portion of the pipe before the end portion of the pipe is brought into contact with the substantially smooth interior surface

of the sealing sleeve.

  The process of the invention will now be described in detail, with reference to the accompanying drawings in which FIG. 1 is an axial section of a sealing sleeve to be used to implement the process of the invention in order to connecting an end portion of a pipe having a smooth outer surface with an opening, for example an opening made in a concrete manhole collar; Figures 2 and 3 show the method of connecting the end portion of the pipe having a smooth outer surface with the manhole collar by means of the sealing sleeve of Figure 1; Figure 4 is an axial section of a sealing sleeve for connecting an end portion of a pipe having moldings which extend peripherally, or having an outer surface which is not smooth, with an opening made in a manhole collar using a sealing sleeve according to the method of the invention; and Figures 5 to 7 are sections illustrating the method of connecting the end portion of the pipe provided with moldings which extend peripherally with the opening made in a manhole collar by means of the sleeve sealing shown in

figure 4.

  The sealing sleeve 2, shown in FIG. 1 and intended to be used for implementing the method of the invention, is made

  rubber-like elastic material. In the condition shown

  As shown in Figure 1, the sleeve can be used to connect an end portion of a pipe which has a smooth outer surface to an opening, made for example in a manhole collar. In

  the condition shown in Figure 1, the sleeve has an outer surface

  smooth 4 with a rim 6 which extends outwards and which has a contact surface 8 making a right angle with the axis of the

  sleeve 2 and with the outer surface 4.

  The sleeve 2 has on its inner surface 10, at its end o is located the rim 6 directed outwards, a molding

  support 12 directed inwards and defined by two lateral surfaces

  oblique strips 14 and 16 connected at an inner edge 18 extending peripherally on the support molding 12. The

  surface 14 forms a conical entry surface which facilitates the introduction

  tion of the end part of a pipe in the sleeve 2.

  Axially inside the support molding 12, the sleeve 2 has a sealing lip 20, directed inwards, which is defined in the direction of the support molding 12 by an oblique surface 22 making an angle d '' about 55 with the axis of the sleeve, while the opposite lateral surface 24 of the sealing lip 20 makes substantially a right angle with the axis of the sleeve 2. In addition, the sleeve 2 has on its inner surface 10 two annular projections 26 and 28 having a substantially triangular section. According to the method of the invention, to connect an end portion of a pipe which has a substantially smooth outer surface to an opening 32 formed in a manhole collar 34, defined by an annular wall 30, there is provided the sealing sleeve 2 in the position of FIG. 1 inside the opening 32 of the manhole collar 34, as shown in FIG. 2. For this, the wall of the sealing sleeve 2 can be moved at a point on its periphery towards the diametrically opposite point of the sleeve, in order to give the sleeve a smaller diameter, and introduce the sleeve in this position inside the opening 32. The sleeve then returns to its normal position. In this position, the smooth outer surface 4 of the sealing sleeve 2 bears against the annular wall 30) and the rim 6 bears against the outer surface of the manhole collar 34, around the opening 32 formed in this collar .

  The end portion 38 of the pipe having an outer surface

  smooth smooth 36 is then inserted into the sleeve 2 until the posi-

  tion shown in Figure 3. The introduction of the end portion 38 of the pipe into the sleeve 2 is facilitated if the outer surface 36 of the end portion 38 of the pipe is provided with any type of lubricant before the introduction. Preferably, the end part 38 of the pipe comprises a female butt 40 which can be used for the connection of a pipe to the end part 38 of the pipe and,

  thus, at the opening 32 in the manhole collar 34.

  When connecting the end part of a pipe with an outer surface which is not smooth, for example the end part

  a pipe with moldings which extend peripherally

  At the opening 32 in the manhole collar 34, the sealing sleeve 2 is arranged as shown in FIG. 4, that is to say with the smooth surface 4 and the flange 6 facing towards inside and with the

  support molding 12, sealing lip 20 and peripheral projections

  risks 26 and 28 facing outwards. The end portion 42 of the pipe shown in axial section in FIG. 5 and formed by a plastic pipe comprising moldings 44 which extend peripherally is initially cut at one end 46 between two moldings 44. seal 48 are then placed in two of the grooves formed between the moldings 44, these

  sealing rings being dimensioned so that their external surfaces

  50 are placed slightly outside the outer periphery

  molding 44. If desired, the sealing rings 48

  can be fixed by adhesive in the grooves between the moldings 44.

  The end portion 42 of the pipe on which the sealing rings 44 are placed is then coupled to the sealing sleeve 2 by introducing the end portion of the pipe into the sealing sleeve to a position in which the end surface 46 of the end part of the pipe is in contact with the contact surface 8 of the flange 6. Finally, the end part 42 of the pipe and the sealing sleeve 2 are pressed into the opening 32 of the manhole collar 34, the sealing lip 20 and the annular projections 26 and 28 therefore being placed in contact with the annular wall 30 of the opening 32. If desired, the position of the end portion of the pipe can be defined relative to the manhole collar by placing, before the introduction of the end portion 42 of the pipe into the opening 32, a contact element axially at the outside of the sealing sleeve 2, this element of contact being retained between two of the moldings 44 and, in the desired position of introduction, bearing on the exterior surface of the manhole collar 34 outside

opening 32.

  According to the invention, what matters is that one can connect an end portion of a pipe to an opening formed in a manhole collar, pipe or the like using a single and same sealing sleeve to connect to this opening

  end parts of different types of pipes.

  It is understood that the foregoing description has not been

  given only by way of illustration and not limitation and that variations

  your or modifications can be made within the framework of the

present invention.

Claims (8)

  1. Method for sealing a space between a   annular wall (30) which defines an opening (32) and the end portion   mite (38, 42) of a pipe introduced into this opening by fitting a sealing sleeve (2) made of an elastic material of rubber type between the annular wall and the external surface of the part end of the pipe, the sealing sleeve having an internal surface and an external surface, one (4) of these surfaces being smooth and the other (10) comprising at least one sealing protuberance (20) which peripherally extends, characterized in that the sealing sleeve (2) is disposed with the surface (10) comprising at least one sealing protuberance (20) which extends peripherally facing inward, in contact with the end part of the pipe, and with the substantially smooth surface (4) facing outwards, in contact with the annular wall (30), when an end part is connected to the annular wall (30) of pipe (38) having a substantially smooth outer surface e, and in that the sealing sleeve (2) is arranged with the substantially smooth surface (4) facing inward, in contact with the end portion of the   pipe (42), and with the surface (10) comprising at least one protuberance   sealing rancid (20) which extends peripherally towards the outside, in contact with the annular wall (30), when a pipe end part (42) is connected to the annular wall (30) having an outer surface which is not smooth, for example a surface   outer with moldings (44) extending peripherally.   2. Method according to claim 1, characterized in that the sealing sleeve (2) is initially disposed with its substantially smooth surface (4) facing outwards, in contact with the annular wall (30), and in that that the pipe end portion (38) with the substantially smooth outer surface is then pressed into the sealing sleeve (2), until it comes into contact with the inwardly facing surface (1 ()) and with at least one protuberance   sealing (20) which extends peripherally.   3. Method according to claim 2, characterized in that the sealing sleeve (2) is disposed in the opening (32) by pushing the wall of the sealing sleeve into a part of the periphery of the sleeve in the direction of the diametrically opposite part of the sleeve in order to give the sleeve a smaller outside diameter, in that the sleeve (2) is introduced in this position into the opening (30) and in that the sleeve then returns to its normal position with the substantially smooth outer surface (4) of the sleeve in contact with the annular wall (30).   4. Method according to any one of claims 2 and 3,   characterized in that the end part (38) of the pipe and / or the sealing sleeve (2) are provided with a lubricant before the end part of the pipe is introduced into the sealing sleeve, in contact with the surface (10) provided with at least one protuberance   sealing (20) which extends peripherally.   5. Method according to claim 1, characterized in that the sealing sleeve (2) is arranged with its substantially smooth surface (4) in contact with the outer surface of the end portion (42) of the pipe which does is not smooth, and which comprises for example moldings (44) extending peripherally, and in that the end portion of the pipe on which the sealing sleeve is placed is then introduced into the opening (32 ) defining the annular wall (30) with the outer surface (10) of the sealing sleeve provided with at least one sealing protuberance (20) which extends peripherally in contact with the annular wall (30).   6. Method according to claim 5, the end part (42)   of the pipe having moldings (44) extending peripherally   risk, characterized in that one or more sealing rings (48) are arranged between the moldings (44) of the end part (42) of the pipe before the end part of the pipe is brought into contact with the substantially smooth interior surface (4) of the sleeve sealing (2).   7. Method according to claim 6, characterized in that the substantially smooth inner surface (4) of the sealing sleeve is fixed by means of an adhesive to the outer surfaces of the rings sealing (48).   8. Method according to any one of claims 5 to 7,   characterized in that the end part (42) of the pipe is, inside   of the sealing sleeve (2), provided with a contact element which, when the end portion of the pipe on which the sealing sleeve is placed is inserted into the opening defined by the annular wall , comes into contact with the element, the annular wall being formed so as to define the position of the end part of the   pipe and sealing sleeve relative to the annular wall.