LU82667A1 - CONNECTION FOR SMOOTH TUBE TUBES - Google Patents

Description

- 1 - The invention relates to a connector for pipes with smooth ends comprising two removable shells joined by clamping means and surrounding the joint of the pipes placed end to end.

Various connection methods have been proposed, such as welding, threading, flanges, etc. to connect hoses with smooth ends.

The object of the invention is to provide a connection for pipes with smooth ends more economical than known fittings, easy to assemble and disassemble and which is blocked on the pipes, which tend to deviate from each other. , when they are pressurized.

According to the invention this object is achieved by a connector comprising two circumferential grooves made on either side of said seal in the two shells and a respective washer placed in and each having an inner edge with a sharp edge, each of the grooves / a diameter inside at least equal to the outside diameter of the pipes to be connected and a width such that by tightening the two shells using the clamping means the inside edge of each washer enters the pipes and its outside diameter is reduced by elastic deformation .

The section of the washer can form in each angular position around the axis of the pipes an acute angle with the plane passing through the pipe joint, the inner edge of each washer being closer to the joint than its outer edge.

The inner edge of each washer is cut to form teeth.

The width of each groove is less than the width of the washer and its diameter is at most equal to the outside diameter of the washer.

The connector will include a third groove made in the two shells on either side of the pipe joint and a circular sealing element placed in said groove so as to match on both sides of the joint the external shape. pipes to be connected.

Other objects, characteristics and advantages of the invention will appear better on reading the detailed description which follows of a preferred embodiment of the invention shown in the accompanying drawings in which:

Figure 1 is a front view, partially in section, of a connector according to the invention? Figure 2 is a sectional representation along line II-II of Figure 1; FIG. 3 is a front view of a washer according to the invention, and FIG. 4 is an enlarged representation of part IV of FIG. 3.

Referring to Figures 1 and 2, the connector 1 according to the invention comprises two halves or shells 2, 3 arranged so as to form a central bore 4 intended to receive the ends of the pipes 4.5, placed end to end, when the shells are placed around the pipes 4, 5 and their joint 6 and assembled using bolts 7.

The diameter of the bore 4 is of a size such that in the tight state of the connector, the diameter of the bore 4 is at least equal, but preferably slightly greater than the outside diameter of the pipes 4.5 to be connected .

In the body of the shells 2,3 there are two grooves 8 and 9 arranged on either side of a third groove 10. The grooves 8, 9 are separated from the groove 10 by a respective rib 11, 12 which defines the 'bore 4. The ribs 13 and 14 respectively limiting the grooves 8 and 9 towards the outside of the fitting - 3 - each define a bore 15 with a diameter slightly greater than that of bore 4.

In each of the grooves 8, 9 there is a washer 16 shown in detail in FIG. 3. The inside diameter of the washer is at least equal to and preferably slightly larger than the outside diameter of the pipes 4 # 5. The washer has a width such that, when the bolts 7 are tightened to fix the fitting 1 on the pipes 4,5, the internal edge 17 penetrates into the material of the pipes 4,5 and hangs thereon. The inner edge 17 of the washer 16 can either have a sharp edge, or be cut at regular intervals to form teeth 18. Each washer 16 is disposed in its associated groove 8 or 9 so that its section forms in any angular position around the axis of the pipe or fitting an acute angle with the plane passing through the joint 6 of the pipes 4.5 placed end to end. In this position the inner edge 7 of each washer 16 is closer to this plane than its outer edge. In this way the inner edge 17 of the washer 16 is advantageously forced with its sharp edge or its teeth 18 in the material of the pipe to hang there, when the fitting 1 is fixed on the pipes 4,5 to be joined and prevents during of the pressurization of the pipes which deviate from each other The diameter of the grooves 8.9 is at most as large as the outside diameter of the washers 16, and preferably it is slightly smaller . The width of the grooves 8, 9 is less than the width of the washers 17. This arrangement advantageously supports the blocking effect obtained by the washers 16 penetrating the external surface of the pipes 4,5.

In order to produce a tight seal, an elastic sealing element 19 is placed in the central groove 10 over the entire circumference of this groove. The sealing element 19 can have a cross-section in the form of a bridge, the two legs of which rest on either side of the joint 6 between the pipes 4,5 placed end to end. In this way the pressure exerted by the two shells on the sealing element 19, the thickness of which is greater than the depth of the groove 10, and its elasticity cause between the pipes 4,5 and the shells 2,3 of the connection 1 a tight seal preventing the fluid under pressure in the pipes 4,5 from leaving the location of the connection.

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To make the connection / two pipes with smooth ends, the ends of pipes 4,5 are cut at right angles to the axis of the pipes. A washer 16 is placed on one end of each of the pipes 4,5 which are placed end to end inside the central opening of the sealing element 19 while ensuring that the seal 6 is in the middle of the sealing element 19. The washers 16 are then adjusted at the places where the grooves 8, 9 of the connector come to rest. Then the shells 2, 3 of the connector 1 are placed on the pipes so that the washers 16 respectively enter the grooves 8, 9 and the sealing element is placed in the groove 10. The bolts 7 are in place and their nuts are tightened. The washers undergo an elastic deformation of their outside diameter and the sharp edge or the teeth 18 of the inner edge 17 penetrates into the pipes 4,5, to hang there. The sealing element 19 is pressed against the pipes 4,5 to match their shape and form a tight seal between the two pipes 4,5. During the pressurization of the pipes 4,5, which because of this pressure tend to deviate from each other, the coupling between the washers 16 and the pipes 4,5 prevents the pipes from s to dismiss? this hooking effect also prevents the fitting 1 from sliding on the pipes 4,5.

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Of course, various modifications can be made by those skilled in the art to the embodiment which has just been described solely by way of illustrative example without departing from the scope of the invention.

Claims (5)

1. Connection for pipes with smooth ends comprising two removable shells joined by clamping means and surround the joint of the pipes placed end to end, characterized by two circumferential grooves made on either side of said joint in and placed in each of the grooves the two shells and a respective washer / each having an inner edge with a sharp edge, an inside diameter at least equal to the outside diameter of the pipes to be connected and a width such as by clamping the two shells using the clamping means inner edge of each washer enters the pipes and its outer diameter is decreased by elastic deformatic. 2. A connector according to claim 1, characterized in that the section of each washer forms in each angular position around the axis of the pipes an acute angle with the plane passing through the joint of the pipes, the inner edge of each washer being more near the joint as its outer edge. 3. Connection according to claim 1 or 2, characterized in that the inner edge of each washer is cut to form teeth. 4. Connection according to any one of claims 1 to 3, characterized in that the width of each groove is less than the width of the washer and that its diameter is at most equal to the outside diameter of the washer. 5. Fitting according to any one of claims 1 to 4, characterized by a third groove made in the two shells on either side of the pipe joint and a circular sealing element placed in said groove so as to match on either side of the joint the external shape of the pipes to be connected.