SE466275B - CONTAINER, SPECIFICALLY FOR A PRESSURE FLUID - Google Patents

Abstract

A cylindrical high-pressure container comprises two halves (10, 12) which are telescopically pushed together and glued. The glue joint comprises an internal double cone (24, 26) which readily fits onto an external double cone (28, 30), wherewith the cones grip together in a manner to resist axial parting of the cones. A reinforcing filament or thread is wound around the joint to form a strengthening cuff (44) which holds the joined parts together.

Description

At least one of the adhesive surfaces intended for gluing together has a relatively thick adhesive layer which gives the required strength and tightness in the adhesive joint.

This is achieved with a container of the type stated in the preamble of claim 1 and which according to the invention has the features stated in the characterizing part of claim 1.

By performing the joint according to the invention it is achieved that the applied adhesive layers on the end portions of the container halves when the two end portions are pushed together only to a limited extent or substantially not at all, which means that the adhesive layer with sufficient adhesive is brought together and forms an adhesive joint with desired strength and density. In addition, the end portions of the container halves are designed with such cooperating conical surfaces that a grip is obtained which counteracts axial contraction of the two halves. To maintain this grip, a reinforcing sleeve is arranged around the joint in the form of wound reinforcement wire in combination with a plastic. With the aid of this sleeve, the end portions are locked in their grip with each other so that the glue in the glue joints cannot be exposed to forces that could break up the glue joints.

Some suitable embodiments of the container according to the invention are shown as examples of the accompanying drawings.

Fig. 1 is a side view of the container consisting of two glued-together cylindrical halves made in one piece with each end end.

Fig. 2 shows on an enlarged scale a section along the line 2-2 in Fig. 1.

Fig. 3 is a detail view of the end portion of the outer half of the cylinder in the joint in section such as is included in Fig. 2.

Fig. 4 is a detail view of the inner end portion included in the joint in section as it is included in Fig. 2. Fig. 5 shows a first intermediate position during the insertion of the outer end portion on the inner end portion after the fact that the adhesive surfaces of the two end portions have been provided with adhesive layers.

Fig. 6 shows a second intermediate position after continued insertion from the position in Fig. 5.

Fig. 7 shows a third intermediate position after continued insertion to a position which is just before the final position according to Fig. 2.

Fig. 8 shows another embodiment of the joint at the container according to the invention in a glued end position.

Fig. 9 shows an intermediate position before the final position in Fig. 8.

The container in Fig. 1 is composed of two cylindrical halves 10, 12 which are each made in one piece with an end end 14 and 16, respectively.

In the joint 18 between the two halves, the end portion 20 of one half is slid over the end portion 22 of the other half so that the inner adhesive surfaces of the outer end portion 20 abut closely against the outer adhesive surfaces of the inner end portion 22 to effect such effective gluing together into a adhesive joints that are securely sealed against any large gas pressures in the container, in the order of 5-100 bar. The adhesive joint can also absorb significant tensile forces.

The halves 10 and 12 are made according to the known method, where a layer of longitudinal and transverse fiberglass wires is first built up on a core by means of a robot and then the fiberglass wire body is placed in an external molding tool. Finally, plastic is injected into the tool to obtain a fiberglass-reinforced half that can absorb relatively large axial and radial forces. The plastic is usually a polyester that is allowed to harden before the tool is opened.

The outer end portion 20 should be relatively easy to stretch to a larger diameter, as described below. It is therefore manufactured with a considerably smaller number of winding turns of fiberglass wire than for half 10 otherwise, or completely without winding turns and only with axial fiberglass wires extending to near the edge of the end portion. . The inner adhesive surface of the end portion 20 is composed of two inner truncated cones 24, 26, and the end portion 22 has an adhesive surface composed of two outer truncated cones 28, 30 which closely fit the cones 24, 26. The wide base ends of the cones are facing each other and have at the crossings 32 and 33, respectively, their largest diameter. In the mounted position, the transition points 32, 33 coincide. The transition 32 is suitably softly rounded. The end portion 20 further has an end surface 34 which is glued together with an end surface 36 of the end portion 22.

In Figs. 2-7, the cone angle 2A of the cones 24, 28 is larger than the cone angle 2B of the cones 26, 30, which is indicated in Fig. 3 by the angle A being about 12 ° (ie a cone angle 24 °) and the angle B being about 4 ° (ie and cone angle 8 °.

Before joining the halves according to Figs. 5-7, an adhesive layer is applied to all the adhesive surfaces. The adhesive can, for example, be a curing adhesive of epoxy type.

The adhesive surfaces 24, 26, 34 thus have adhesive layers 24A, 26A and 34A, respectively. On the adhesive surfaces 28, 30 and 36 there are adhesive layers 28A, 30A and 36A, respectively. The end portion 20 has at its end an end edge 38 which is rounded so as not to form a scraping edge. The end portion 22, in turn, extends into a section wedge-shaped edge portion 40, which is subjected to the gas pressure in the container and is actuated in the direction of the adhesive surface 24 in order to maintain the desired abutment against it.

When the end portions of the halves are pushed together, the edge 38 will hit the adhesive surface 28 at a place 42, after which the edge 38 slides on the adhesive layer 28A while reducing its thickness between 4). 466 2754 s point 42 and the transition 32 between the adhesive surfaces 28 and 30. The thinner adhesive layer thus obtained is denoted by 28C.

In addition, an unaffected adhesive layer 28B has been left on the adhesive surface 28. When the edge 38 is at the transition 32 according to Fig. 6, the end portion 20 has been expanded radially during bending so that the cone angle of the cone 26 has been reduced in this position. Upon continued insertion, the adhesive layer 26A will be smoothed by the transition point 32 to a thinner adhesive layer 26C on the adhesive surface 26.

As illustrated in Fig. 7, the adhesive surface 26 with its thin adhesive layer 26C will be freely above the unaffected adhesive layer 30A until the end portions are almost completely pushed together and the adhesive layers 34A and 36A on the end surfaces have been brought into contact with each other.

Thus, upon final gluing, the normal adhesive layer 24A will be compressed with the normal adhesive layer 28B and with the thinner adhesive layer 28C. On the other side of the transition 32, the thinner adhesive layer 26C will be compressed with the normal adhesive layer 30A.

In each adhesive joint, the gluing will thus take place by means of an adhesive layer which has a normal thickness and a normal or thinner adhesive layer after the joining of the end portions.

Thereafter, a reinforcing wire such as fiberglass wire is wound around the joint together with a suitable UV-curing plastic to provide a strong wire-reinforced reinforcing sleeve 44, which locks the end portions to the end position shown in Fig. 2, where the conical adhesive surface 26 engages the conical adhesive surface 30. in a grip which prevents axial retraction of the halves 10 and 12. In combination with the sleeve 44, this grip is thus maintained which, together with the adhesive joints, which are tight and strong, means that the joint can be dimensioned by simple means to withstand existing axial tension and pressure 10 15 20 25 ED Åse 275 6 forces and radial forces. This dressing is thus simple and inexpensive to make and takes up little space on the outside of the container.

The embodiment in Figs. 8 and 9 is in principle designed in the same way as the joint in Fig. 2, the corresponding details in Fig. 8 having been given an additional number no. 1 so that, for example, half 10 in Fig. 2 is designated 110 in Fig. 8 and so on.

The two double-conical adhesive surfaces 124, 126 in this case have an angle A. which is about 12 ° (ie a cone angle 24 °), while the angle B is about 10 ° (ie a cone angle 20 °), which means that the angle B is substantially larger in Fig. 8 than in Fig. 2. The cone angle 2B may be in the range 6 ° -30 °.

As shown in Fig. 9, the rounded edge 138 will slide along the entire adhesive surface 128 and smooth it into a thinner adhesive layer 128C.

The rounded transition edge 132 will even out the adhesive layer 126121111 a thinner adhesive layer lzsc.

The adhesive layers 124A and 130A, on the other hand, become substantially unaffected during the joining of the halves 110 and 112 until the end portions reach the final position in Fig. 8.

Because the conical surface 126 has a larger conicity than the surface 26 in Fig. 2, the surfaces 126 and 130 will have a stronger coupling and thus a greater resistance to being pulled apart.

The wire-reinforced sleeve 144 effectively locks the parts of the joint in the end position, as shown in Fig. 8.

Since the sleeve 44 and 144, respectively, must be completely unchanged in the event of radial forces occurring due to the gas pressure, it may be appropriate, if necessary, to reinforce the wire reinforcement of the sleeve by the reinforcing wires being made of fiberglass wire and / or steel wire to increase safety.

Claims (2)

5.! p! 10 15 20 25 466 275. 7 Patent claims Container, in particular for a pressure fluid, composed of two preferably cylindrical halves (10, 12; 110, 112) which are preferably made in one piece with each end end in reinforced plastic with a reinforcement in the form of longitudinal fiberglass wires and transverse, wrapped fiberglass wires, the end portion of one half being slid over the end portion of the other half and attached thereto by gluing close-together adhesive surfaces, characterized in that one half of the joint surface portion (20; 120) has an inner surface , of two truncated cones composed (24, 26; 124, 126) of adhesive surface with the base ends of the inner conical sub-surfaces passing over at a place (33; 133) in each other, that the end half (22; 122) of the other half of the joint has an outer , of two truncated cones (28, 30; 128, 130) composite adhesive surface which with its two outer conical sub-surfaces fits closely to the two inner conical sub-surfaces, and that around the end portion of the glued halves r there is a layer of wound reinforcing wire which is held in position with an adhesive and forms a reinforcing sleeve in the joint area. Container according to claim 1, characterized in that the one inner conical adhesive surface (26; 126), which during the joining of the two end portions (20, 22; 120, 122) is stretched radially to a larger diameter at its passage over the transition (32; 132) between the outer conical adhesive surfaces (28, 30; 128, 130), has a cone angle which is in the range 6 ° -30 °, preferably 4 ° -10 °.