RU2805685C1 - Device for removing nipple fragment from air line tee if it is broken - Google Patents

Abstract

FIELD: tools.

SUBSTANCE: tool used in organizing and carrying out repair work on air lines and pipelines to remove hollow elements (a fragment of a nipple or a welded fitting) with a torn threaded part when they break in the internal threaded connections (tees) of the air line (including the brake railway rolling stock systems) or other pipelines for various purposes using threaded connections. The device for removing a fragment of a nipple from an air line tee in case of a break is made of a single piece of high-strength alloy steel, having a tetrahedral rectangular middle part, in the centre of which there is a through hole; on one side of the middle part there is a tetrahedral truncated pyramid with sharp edges on each face , on the other side of the middle part there is an external groove with an external thread, from the end part of which there is a protruding external groove of a smaller diameter for the impact platform.

EFFECT: creation of a new device, the use of which eliminates the loss of time when eliminating a malfunction that has arisen in the brake or other air line in railway rolling stock along the route, reducing the time for uncoupled repair of a car on general purpose railways and railway stations unsuitable for this purpose, reducing the time of train losses on the Russian Railways network, including the use the device at industrial railway transport enterprises without participation of specially trained workers.

1 cl, 7 dwg

Description

Field of technology

The device is intended for removing a fragment of a nipple when it is broken in a threaded connection of an air line, removing a hollow element with a broken threaded part from an air line tee, a braking system (including railway rolling stock), or other pipelines for various purposes using threaded connections with welded joints. fittings.

State of the art

The following technical solution is known from the prior art of such a device: A conical extractor for unscrewing broken bolts, threaded rods, bushings, pins, made of carbide metal in the form of a solid cylindrical rod with a faceted tetrahedral wedge-shaped working part on one side, and a shank with a seat for a nut key on the other side (Fig. 1). The device is presented on the Russian market as a finished product under the brand “AIST” - Auto Instruments and Special Tooling, positioned as a professional tool manufactured on the production line of the Taiwanese plant HONITON INDUSTRIES, sold through dealers and a network of online stores (Fig. 2 , 3, 4) published on the website (https://www.aist-tools.ru/about-the-company/brands/6956) of the trading and production company AIST LLC © 1996-2021

The disadvantage of the prototype is that it has a certain, narrow specialization and is designed for removing broken fasteners in the form of a rod (bolts, studs, bushings, pins) with external threads, and due to its design features cannot be adapted for working with nipples and welded fittings used in tees or corner threaded connections of air lines and pipelines.

On the railway, unregulated methods were used to extract fragments of a nipple or a hollow element with a broken threaded part when it was broken in a threaded connection, incl. from the air line tee by driving the track spike inside the hollow broken element and unscrewing it or replacing the entire tee.

The disadvantages of this method are the high probability of damage to the threaded connection and the air line tee itself, an increase in repair time, at a railway testing site entails an increase in the time of train losses, and an increase in the cost of organizing uncoupling repairs.

The solution to the technical problem of the claimed invention was to overcome the technical shortcomings inherent in analogues, which led to the need to create a new device that ensures ease of manufacture, a high degree of reliability and optimization of production and technological processes when performing repair work. As well as the expansion of the arsenal of devices used during repair work (on railway rolling stock, industrial railway transport enterprises (PPZhT), urban housing and communal services enterprises) with pipelines when removing a fragment of a nipple or welded fitting from a threaded connection when it is broken.

Disclosure of the invention

The technical result of the present invention was the creation of a new device, the use of which eliminates the loss of time when eliminating a malfunction that has arisen in a brake or other air line in a railway rolling stock along the way, reducing the time for uncoupled repair of a car on general purpose railways, and those not adapted for this railway stations, reducing the time of train losses on the Russian Railways network, incl. when used at industrial railway transport enterprises, without the participation of specially trained workers. This is achieved due to the unification and ease of use of the device, made from a single piece of high-strength alloy steel, having a tetrahedral rectangular middle part, in the center of which there is a through hole for using a locksmith's wrench as an alternative to a wrench or adjustable wrench. On one side of the rectangular middle part there is a tetrahedral truncated pyramid, which has sharp edges of each face, which are the working elements of the device, with the help of which the hollow element (a fragment of a nipple or a welded fitting) with a broken threaded part is removed from the threaded connection when it breaks (in this case, the truncated edge of the pyramid to accommodate a 3/4" thread has a size of at least 10x10 mm). On the other side of the middle part there is an external groove with an external thread, which serves as a plug for blocking a faulty air (brake) line or other pipeline with an internal thread; a chamfer of 1-1.5 mm is removed in front of the thread. On the same side, in the end part there is a protruding outer groove of smaller diameter for a platform for impact when installing the device into the hollow element of a nipple fragment or welded fitting.

This adaptation of the claimed invention, in comparison with the applied method and existing technology (for troubleshooting problems associated with a fracture of a nipple fragment or a welded fitting in the internal threaded connection of various types of air lines and pipelines), ensures ease of manufacture and use. The use of this device ensures optimization of production and technological processes when performing repair work.

The result was the choice of a unified design consisting of one part, where the working part of the device is a puller, and the shank (the other edge of the device) serves as a plug.

The peculiarity of the claimed invention: “A device for removing a fragment of a nipple from an air line tee in case of a break” is the simplicity of the design, and the unification allows it to be used not only at the enterprises of the Russian Railways JSC landfill, and industrial railway transport enterprises, but also at urban enterprises housing and communal services, enterprises operating pipelines for various purposes, incl. in domestic conditions of the private sector, where it may be necessary to eliminate a malfunction in pipelines associated with removing a fragment of a nipple, a welded fitting (a hollow element with a broken threaded part) from a threaded connection when it is broken. The claimed invention makes it possible to include this device in the list of tools in the technical first aid kit of an employee who is entrusted with the responsibility of troubleshooting problems associated with removing a hollow element (a fragment of a nipple or a welded fitting if they are broken) from the internal threaded connection of various types of air lines and pipelines.

Brief description of drawings

The claimed invention “Device for removing a fragment of a nipple from an air line tee in case of a break” is illustrated by drawings that show the following:

fig. 1 - sample of a known technical solution (product);

fig. 2 - screenshot of the official dealer AIST LLC;

fig. 3 - screenshot of a dealer network of online stores;

fig. 4 - copy of the certificate for the sale of AIST products;

fig. 5 - example of the implementation of the claimed device - side view (with footnotes to the elements);

fig. 6 - example of the implementation of the claimed device - front view (with footnotes on the elements);

fig. 7 - an example of the implementation of the claimed device - rear view (with footnotes on the elements).

The positions in the sectional drawings indicate the following elements:

1 - tetrahedral rectangular middle part;

2 - tetrahedral truncated pyramid;

3 - external groove;

4 - external groove with external thread;

5 - chamfer;

6 - external groove under the impact platform;

7 - working sharp edge of the right angle of each face;

8 - through hole for a mechanic's wrench;

9 - truncated edge of the pyramid. Implementation of the invention.

The device for removing a fragment of a nipple from an air line tee in the event of its break is made of a solid piece of high-strength alloy steel (Fig. 5), having a tetrahedral rectangular middle part (1), in the center of which there is a through hole (8) for using a bench wrench as an alternative wrench or adjustable wrench. On one side of the rectangular middle part there is a tetrahedral truncated pyramid (2), having sharp edges of each face (7) which are the working elements of the device, with the help of which a hollow element (a fragment of a nipple or a welded fitting) with a broken threaded part is removed from a threaded connection when its fracture (at the same time, the truncated edge of the pyramid to accommodate a ¾-inch thread has a size of at least 10×10 mm). On the other side of the middle part there is an external groove (3) with an external thread (4) that serves as a plug to block a faulty air (brake) line or other pipeline with an internal thread; a chamfer (5) of 1-1.5 mm is removed in front of the thread. On the same side, in the end part there is a protruding outer groove (6) of smaller diameter for a platform for impact when installing the device into the hollow element of a nipple fragment or welded fitting.

The design of the claimed invention has the following technical characteristics, depending on the conditions of its use (in railway transport, in housing and communal services, or in the private sector):

Example

The total length of the device (for 3/4 inch thread - 125 mm - Fig. 5);

Tetrahedral rectangular middle part (1) 50 mm long and 25x25 mm in size;

Tetrahedral truncated pyramid (2) 30 mm long;

External groove in front of the thread (3) 0.5 mm long and 19 mm in diameter;

External groove with external thread (4) with a diameter of 3/4 inch and a length of 35 mm;

Chamfer before thread (5) - 1-1.5 mm;

External groove under the impact platform (6) with a diameter of 10 and a height of 0.5 mm;

Hole (8) for a mechanic's wrench with a diameter of 8 mm; truncated edge of the pyramid (9) no less than 10×10 mm.

Claims (1)

A device for removing a fragment of a nipple from an air line tee in case of a break, made of a single piece of high-strength alloy steel, having a tetrahedral rectangular middle part, in the center of which there is a through hole, on one side of the middle part there is a tetrahedral truncated pyramid, having sharp edges on each face, on the other side of the middle part there is an external groove with an external thread, from the end part of which there is a protruding external groove of a smaller diameter for the impact platform.