RU215612U1 - Friction hydraulic expansion tubular anchor - Google Patents

Abstract

образной складкой,, сложенной вовнутрь по всей длине, раздуваемую втулку с раздуваемым отверстием, установленную на конце трубке таким образом, что отверстие втулки сопряжено с отверстием в трубке с образованием герметичного канала, соединяющего внутреннюю часть раздувной втулки и внешнюю часть трубки для нагнетания жидкости, герметичный канал выполнен посредством сварного шва, образованного путем полного заваривания предварительно просверленного отверстия с большим диаметром, чем будущий герметичный канал, с последующим его рассверливанием меньшим диаметром. 3 ил.The utility model relates to the mining industry, namely to the fastening of mine workings, in particular to anchoring for weak rocks. The technical result, which the proposed utility model is aimed at, is to increase the efficiency of the anchor by creating increased pressure in the expandable tube, as a result of ensuring the tightness of the channel for fluid to enter the inflatable tube. The technical result is achieved by the fact that in the friction hydraulic expansion tubular anchor, which includes a tube with a longitudinal

shaped fold, folded inward along the entire length, an inflatable sleeve with an inflatable hole, installed at the end of the tube so that the opening of the sleeve is associated with an opening in the tube to form a sealed channel connecting the inside of the inflatable sleeve and the outer part of the tube for injecting liquid, sealed the channel is made by means of a weld formed by complete welding of a pre-drilled hole with a larger diameter than the future sealed channel, followed by its reaming with a smaller diameter. 3 ill.

Description

The utility model relates to the mining industry, namely to the fastening of mine workings, in particular to anchoring for weak rocks.

Known friction tubular anchor and inflating adapter for it (US Pat. RF for the invention No. 2436961, IPC E21D21 / 00, Z. 26.07.2007, op. 20.12.2011 Bull. No. 35), containing an expandable tube connected to the sleeve and at the same time a sleeve-like sleeve is provided, wherein the sleeve connected to the expandable tube is inserted into the sleeve-like sleeve, and the sleeve-like sleeve in its section, which is opposite to the section that receives the sleeve with the expandable tube, is configured to receive another structural element.

The disadvantage of the known tubular friction anchor is the absence of a sealed channel when the anchor is filled through the hole with a liquid that inflates the folded fold, while the liquid can enter the gap between the expandable tube and the sleeve, which reduces the efficiency of the anchor.

The closest in technical essence is a friction tubular anchor and an inflating adapter for it (RF patent No. 207877, IPC E21D21 / 00, z. 26.07.2021, op 22.11.2021 Bull. No. 33), including a tube with a longitudinal Ѡ -shaped fold folded inward along the entire length, an inflatable sleeve with an inflatable hole.

The disadvantage of the known tubular friction anchor is the absence of a sealed channel when the anchor is filled through the hole with a liquid that inflates the folded fold, while the liquid can enter the gap between the expandable tube and the sleeve, which reduces the efficiency of the anchor.

The technical result, which the proposed utility model is aimed at, is to increase the efficiency of the anchor by creating increased pressure in the expandable tube, as a result of ensuring the tightness of the channel for fluid to enter the inflatable tube.

The technical result is achieved by the fact that in a friction hydraulic expansion tubular anchor, including a tube with a longitudinal ɷ- shaped fold folded inward along the entire length, an inflatable sleeve with an inflatable hole installed at the end of the tube in such a way that the sleeve hole is associated with the hole in the tube with the formation sealed channel connecting the inner part of the inflatable sleeve and the outer part of the tube for injecting liquid, the sealed channel is made by means of a weld formed by completely welding a pre-drilled hole with a larger diameter than the future sealed channel, followed by its reaming with a smaller diameter.

The creation of a tightness of the channel for the liquid to enter the inflated tube, connecting the inner part of the inflated sleeve and the outer part of the tube with a longitudinal ɷ- shaped fold, ensures one hundred percent ingress of liquid into the tube, using all its pressure to open the fold, which increases the efficiency of the anchor.

On figa presents a friction hydraulic expansion tubular anchor - General view of the anchor;

in fig. 1b shows a section of the AA anchor sleeve;

in fig. 2 shows an anchor with a section of an inflatable sleeve;

in fig. 3a shows a cross-section of an anchor sleeve with a sealed channel formed by a drilled new hole in a welded hole;

in fig. 3b shows a section of the anchor sleeve with a sealed channel formed by the welded edges of the inner surface of the expandable tube and the outer surface of the sleeve.

Friction hydraulic expansion tubular anchor consists of

1 - inflatable sleeve;

2 - hole for injection of liquid;

3 - a tube with an ɷ-shaped fold folded inward along its entire length;

4 - rear bushing;

5 - gap between 8 and 9;

6 - welded seams;

7 - sealed channel;

8 - the outer surface of the pipe at the junction with the sleeve;

9 - the inner surface of the sleeve.

To ensure guaranteed tightness in hole 2 at the time of assembly of pipe 3 and sleeve 1, it is necessary to add a sealed channel 7 connecting the inner part of the inflatable sleeve 9 and the outer part of the pipe 8. The sealed channel 7 can be made by welding, by any of the available methods. As an option, a pre-drilled hole 1 in the sleeve with a larger diameter than the future sealed channel 7 is welded completely and then a hole of smaller diameter is drilled to form a sealed channel 7. When the hole is welded, the welding seam 6 fills all the voids 5 between the sleeve 1 and pipe 3, and then the gap 5 does not matter, which may be in the place where the sleeve 1 fits to the pipe 3 in the area of the hole 2.

Also, one of the ways to solve it is possible to form a sealed channel 7 by welding (welding seam 6) directly to the edges in the hole 2 of the sleeve 1 and pipe 3 by any available method.

The use of this solution makes it possible to achieve pressure transfer to the internal cavity up to 600 bar, while reducing the cost of assembling the inflatable sleeve 1 and pipe 3.

Claims (1)

Friction hydraulic expansion tubular anchor, comprising a tube with a longitudinal ɷ- shaped fold folded inward along its entire length, and an inflatable sleeve with an inflatable hole installed at the end of the tube in such a way that the sleeve hole is mated with the hole in the tube to form a sealed channel connecting the inner part an inflatable sleeve and the outer part of the tube for injecting liquid, characterized in that the sealed channel is made by means of a weld formed by completely welding a pre-drilled hole with a larger diameter than the future sealed channel, followed by its reaming with a smaller diameter.

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