RU188902U1 - ADAPTATION TO DISCONNECT A BRANCH ON THE CUT-OFF PLACE WITH THREAD FITTING - Google Patents

Abstract

A device for shutting off a branch at a tie-in site for a threaded fitting refers to pipeline transport to devices for emergency repair of gas pipelines and can be used to turn off the inlet gas pipeline at the place of tie-in to a distribution gas pipeline. The device has a holder, combined with a guide cone, a finger pressed into it, a feed cone, a compression spring. The holder, combined with the guide cone, and the feed cone have an external thread similar to the internal thread in the tee fitting. Between them set the sealing rubber ring. When lowering the shaft, the lower end of the feed cone abuts against the edge of the distribution gas pipeline hole, then the feed cone, overcoming the spring opening force, moves the sealing rubber ring upward along the guide cone, where the sealing rubber ring is pressed against the feed cone and the holder aligned with the guide cone to the inner wall pipe tee tie-in. The movement of gas from the distribution pipeline to consumers is completely stopped.

Description

A device for shutting off a branch at a tie-in site for a threaded fitting refers to pipeline transport, devices for emergency repair of gas pipelines and can be used to shut off the inlet gas pipeline at the tie-in site to the distribution gas pipeline, where the stop fitting has a screw plug, for repair, or when liquidation without stopping the operation of the distribution pipeline.

Known overlap overlap device RF Patent No. 2267050 published on December 27, 2005, comprising a plug consisting of two parts interconnected by a clamping element, and a sealing-holding unit, made in the form of an elastic ring, having two internal conical surfaces fixed against rolling, driven a key with a rod and a head interacting with a clamping element, located inside the hollow rod of the locking element. The plug consists of two coaxial truncated cones with different slopes forming them and having equal diameters of the bases connected by a tie rod. The conical surfaces of the elastic ring interact with the outer surface of the truncated cones, while the truncated cones and the ring are fixed from scrolling. This technical solution is chosen as a prototype. The disadvantages of this technical solution are: to install the plug, a special device is used that has at least three controls, a complex construction of a plug that has an elastic ring, in which a part of the outer surface is provided with an abrasive material, the other is ribbed, it is difficult to make such a product. With the help of such a plug it is difficult to close the internal cavity of the tee nozzle, which has a locking fitting with a thread. This is due to the fact that, to perform a tie-in, the diameter of the cutting tool is selected, as a rule, significantly smaller than the diameter of the internal thread in the tee fitting for screwing in the plug, in order to avoid damage to the thread by the cutting tool. For this reason, the distance between the inner surface of the wall of the inlet nipple inlet pipe and the outer surface of the cutting tool is quite large. As a result, the diameter of the tie-in hole in the distribution gas pipeline will be significantly less than the internal diameter of the tee fitting for screwing in the plug. Therefore, the size of the support for pressing the sealing ring to the wall of the inlet connecting pipe of the tee insert is not sufficient and requires the use of a more complex seal design. The task to which the claimed technical solution is directed is to expand the arsenal of technical means in this area, and proposes to propose a device that can shut off the supply pipe of the tee and the gas pipeline from the distribution box in place of the fitting for fitting the plug, as well as making it easier the design of the sealing element through the use of sealing rubber rings available in the public domain, in addition, by simplifying the design uu use different diameters tripping device. It uses the opportunity not to make a special device, but to use a device to shut off the outlet in place of the tie-in at the threaded fitting with the same device for tapping the tap-offs without reducing the gas pressure that was used for this connection. The technical result is the expansion of the arsenal of technical tools in this area.

The essence of the proposed device is illustrated by drawings: in FIG. 1 shows a sketch of the device and the location of its main elements; FIG. 2 shows the preparation for the use of the device and its connection to the device; FIG. 3 shows the shut-off of the gas supply with the device; FIG. 4 shows the device disassembled; FIG. 5 shows the position of the elements of the device at the stage of completion of works.

FIG. 1, 2, 3, 5 positions are indicated:

1 - holder, combined with a guide cone;

2 - fastening the holder to the shaft of the device for tapping inlets without pressure reduction;

3 - compression spring;

4 - a sealing rubber ring;

5 - feeding cone;

6 - finger;

7 - shaft device for tapping branches without reducing the gas pressure;

8 - disconnecting device (ball valve);

9 - tee fitting for screwing in the plug;

10 - inlet connection pipe tee;

11 - distribution gas pipeline;

12 - airlock device for tapping.

The device works as follows.

At present, tapping into distribution pipelines is performed, as a rule, with the use of tapping inserts without reducing the gas pressure. Most of these tie-ins to private houses, cottages and small enterprises are produced in above-ground distribution gas pipelines using threaded disconnecting devices with the installation of a tee fitting for screwing in cork. If it is necessary to eliminate leaks at the site of the inlet pipeline and for repairs, it becomes necessary to turn off the gas supply in this section of the pipeline. To eliminate the shutdown of a large number of consumers from the gas supply, a device is used to turn off the outlet in place of the tie-in for a threaded fitting (Fig. 1). To this end, a fitting device 8 is installed on the tee fitting for screwing in the plug 9. A sluice chamber 12 is installed on it. After that, a device is installed on the shaft of the tapping device without reducing the gas pressure 7 to disable the tapping in place of the tapping point at the threaded fitting, securing it to the end the shaft of the device for tapping inlets without reducing the gas pressure 7, the holder combined with the guide cone 1 of the fixture, by fastening the holder 2 to the shaft of the device for tapping inlets without reducing the pressure 7. To shl The suction chamber 12 is connected to a device for tapping inlets without reducing the gas pressure. The disconnecting device 8 is opened (Fig. 2). Using the shaft of the tapping device shaft without reducing the gas pressure 7, the device for shutting off the outlet during the fitting with the thread is moved to prevent jamming of the external thread of the holder combined with the guide cone 1 and the feed cone 5 in the internal thread of the tee fitting for screwing in the plug 9, the design provides alternately screwing into it first the threaded part of the feeding cone 5, then the threaded part of the holder, aligned with the guide cone 1 (Fig. 2). Next, deliver a device to turn off the outlet in place of the tie-in at the threaded fitting to the hole in the distribution gas line 11. With further lowering of the shaft of the device for tapping the branches without reducing the gas pressure 7, the lower end of the feed cone 5 abuts against the edge of the distribution gas pipe 11, then the feed cone 5 overcoming the force of unclamping the compression spring 3, moves the sealing rubber ring 4 along the holder, combined with the guide cone 1 upwards, where the sealing rubber ring 4 turns out press down the feed cone 5 and the holder aligned with the guide cone 1 to the inner wall of the supply pipe of the tee insert 10. At the same time, the feed cone 5 moves along the square bushing in the guide hole of the square cross section 6, also having a square cross section and rises up, the compression spring 3 compressed between the holder, combined with the guide cone 1 and the feeding cone 5, while the outer surface of the holder, combined with the guide cone 1 and the inner surface of the feeding cone 5 tend to be combined tit (FIG. 3). As a result of pressing the sealing rubber ring 4 to the inner wall of the supply pipe of the tee insert 10, the internal cavity of the supply pipe of the tee insert 10 is hermetically sealed. Gas movement from the distribution pipeline 11 to the supply pipe of the tee insert 10 completely stops. If it is necessary to turn on the gas after the repair work is completed, the sequence of work is performed in the reverse order. When raising the shaft of the device for tapping inlets without reducing the pressure of gas 7 of the fixture holder, combined with the guide cone 1, attached to the shaft of the device for tapping inlets without reducing the gas pressure 7 of the device for tapping in without reducing the gas pressure, the lower end of the feed cone 5 stops abutting in the edge of the distribution pipe 11, the compression spring 3 retracts the feed cone 5 to its original position, the sealing rubber ring 4, due to internal elastic forces aimed at Returning the ring to its original shape, along the holder aligned with the guide cone 1, returns to its original position. The device for shutting off the outlet in place of the tie-in is moved from the cavity of the supply pipe of the tee insert 10 into the lock chamber of the device for tie-in 12. To do this, using the mechanism of the device for tapping tapping without reducing the gas pressure, mounted on the shaft of the device for tapping the tapping without reducing the gas pressure 7 to turn off the outlet in place of the tie-in with the fitting with the thread move upwards, the external thread is inverted first from the threaded part of the holder, aligned with the guide cone 1 (Fig. 2), then from p zbovoy part of the feed cone 5. Further a device for delivering tap off at the point of connection at the threaded fitting into the lock chamber 12 (FIG. 5). After that, the shut-off device 8 is closed. The final works correspond to the performance of routine maintenance by the device when tapping in the outlet without reducing the gas pressure. The proposed device provides reliable disconnection of the inlet pipeline, without shutting down the gas supply through the distribution gas pipeline.

Claims (1)

A device for shutting off a tap in place of a tie-in for a threaded fitting, characterized in that it contains a holder aligned with a guide cone, having the ability to be attached to the shaft of a device for tapping inserts without reducing pressure, while the holder aligned with the guide cone has a base the thread corresponding to the internal thread of the tee fitting for screwing the plug into the base of the holder, aligned with the guide cone, is pressed in a finger, the working part of which has a four-sided turn The tail cone is dressed on the finger, the lower part of which is fixed from falling out by a stop mounted on the bottom of the finger, the feed cone has a cylindrical shape on the outside with a thread corresponding to the internal thread of the tee fitting for screwing in the plug, and its inner surface is a cone coinciding with the outer surface of the holder, combined with the guide cone, and at the base of the feeding cone, on its inner surface there is also a sleeve with a tetrahedral hole, which allows free movement of the feed cone on the finger, the sleeve also acts as a compression spring limiter installed by the lower end into the seat of the inner surface of the feed cone, the upper end of the compression spring is installed in the bottom of the hole located on the inner surface of the holder aligned with the guide cone, the lower part of the outer surface the feed cone has a shaped chamfer, allowing guaranteed screwing of the threaded part of the feed cone into the tee fitting for screwing in the plug, as well as An emphasis is placed on the edges of the existing hole in the distribution gas pipeline, thereby restricting the movement of the device for shutting off the outlet at the inset when fitting with a thread inside the distribution pipeline itself, between the holder aligned with the guide cone and the flow cone, a sealing rubber ring is installed gas in the inlet pipe tee inset is pressing the sealing rubber ring to the inner wall of the inlet pipe tee inset and by subjecting it to the holder, combined with the guide cone and the feed cone, overcomes the force of the compression spring.

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