RU194764U1 - Pipe Plunger Sealing Device - Google Patents

Abstract

The utility model relates to sealing devices for shutting off or completely eliminating the internal cavity of pipe fittings made with a deviation from the vertical axis. A sealing device for a pipe plunger includes means for introducing a sealing head, including a hollow cylindrical body with an attached flange, a manual actuator containing a pin, with a rod installed inside it, at the end of which a sealing head is attached, containing a clamp with a cylinder mounted on it, a sealant, a wedge at least three crackers covered by a rubber ring, the housing of the sealing head, a nut mounted on the clamp and a retaining ring, made with the possibility of axial moving the body of the sealing head relative to the nut. A cylindrical hole is made in the housing of the sealing head, in which the nut is mounted so that its upper horizontal surface is flush with the upper horizontal surface of the housing of the sealing head. In this case, the nut is provided with a shoulder, with the help of which it is installed close to the lower inner surface of the housing of the sealing head. The sealing means further comprises a collar sleeve located between the nut and the housing of the sealing head. The clamp is made of steel, amenable to hardening hardening. The cylinder is made of hardenable steel. The sleeve is made of bronze. 4 s.p. f-ly, 5 ill.

Description

The technical field to which the utility model relates.

The utility model relates to sealing devices for shutting off or completely eliminating the internal cavity of pipe fittings, including those made with a deviation from the vertical axis. State of the art

The prior art device for blocking the pipe branch, which can be used to perform repair work on the valves of the branches without emptying the main pipeline. The device comprises a housing and a pin, between which a cylindrical pair is sealed by a cuff. To communicate the pins of rotational and translational movements, there is a flywheel with locking screws. In the threaded hole of the flywheel there is a central rod with a hex head, the left end of which is connected to the stop by a left-hand thread. A seal ring, cone, brake crackers fitted with an elastic cord are mounted on the stop. The right ends of the crackers are placed in the grooves of the clip. The clamp is based on a threaded sleeve kinematically connected to the quill via a key. Between the stop and the clamp there is a spiral compression spring. Due to the force of the spring, the clamp takes its extreme position, presses on the shoulder of the threaded sleeve, introducing the last landing belt into the pinhole boring [RU 10828 U1, publ. 08.16.1999, IPC: F16L 55/10].

The disadvantage of this device is the possibility of a malfunction of the device due to incomplete entry of the landing belt into the pinhole boring due to insufficient spring force.

A device, such as "Packer", for closing and eliminating plungers is known, including a device containing a hollow cylindrical body, at the base of which a flange is installed, a pin, equipped with a central rod, is installed in the cavity of the body with the possibility of rotation using an independent manual drive, at the end which is placed detachable plug, characterized in that the detachable plug is made in the form of an overlapping head, which contains a clamp, fixedly mounted on the threaded axis, sealant, slide a wedge-shaped abutment, a spring installed in the pressure cavity, crackers and an upper cup mounted on a nut mounted on the pressure axis, the pressure being made in the form of a sleeve with a shoulder, and an elastic sealant was placed on the cylindrical surface of the pressure sleeve with an emphasis in the specified shoulder; and a movable stop, mated on the inner surface with the outer surface of the clamp sleeve with the possibility of sliding, while the outer surface of the movable stop is made conical in the form of a wedge, on the conical surface of the movable pack ra placed crackers, pressed against the movable stopper rubber ring, biscuits are arranged in spring-grooves of the cup is movable along the outer surface of the movable abutment [patent RU 125 671 U1, publ. 03/10/2013, IPC F16L 55/136].

The disadvantage of this device is the lack of reliability of removing the overlapping head, due to frequent malfunctions in operation due to failure of the spring, which will unlock the crackers of the head.

A device is known from the prior art for blocking a pipe outlet, comprising means for introducing a blocking head, including a manual drive, a hollow cylindrical body with an attached flange, a pin with a rod installed inside it, at the end of which a blocking head is mounted, including a clamp, a sealant , a wedge of at least four crackers covered by a rubber ring, a head housing, a threaded sleeve screwed onto the clamp, and a sliding washer mounted between the body and the threaded sleeve. The clamp is made all-metal, and the threaded sleeve is provided with a locking ring, eliminating the axial movement of the housing relative to the threaded sleeve [patent RU 175971 U1, publ. 12/25/2017, IPC F16L 55/136].

The disadvantage of this device is the high metal consumption of the device and weight, as well as the overall parameters of the device, which together do not allow for accurate and reliable positioning of the sealing head in the branch pipe, which has a displacement of the axis of the flange relative to its main axis and a deviation from the perpendicularity of the connecting surface of the flange and the axis of the pipe .

The disadvantages of the above devices is the impossibility of their use during repair and restoration work to completely overlap the internal cavity of the plunger on the pipeline, including during its elimination, as well as the use for plungers made with a deviation from the vertical axis.

Utility Model Essence

The technical problem to which the proposed utility model is directed is the need to close the pipe fittings for both scheduled and repair work (including the elimination of pipe fittings made with a deviation from the vertical axis, provided that the blocked pipe fittings have the following characteristics :

- no more than 100 mm in height or with a composite pipe;

- the material of manufacture is a longitudinal pipe, with a bulge of the root of the weld or with a burr on the inner surface of the pipe;

- there is a deviation from the vertical to 5 ° inclusive, in the plane of the cross section of the pipeline;

- there is a displacement of the axis of the flange relative to the axis of the pipe up to 5 mm with a deviation from the perpendicularity of the connecting surface of the flange and the axis of the pipe at least 3 °;

- there is a deviation from the normative geometry, including ovality, ellipse of the inner diameter of the pipe within not less than ± 1 mm.

The technical result of the claimed utility model is the expansion of the arsenal of technical means by providing sealing of the cavity of the pipe plunger made with a deviation from the vertical axis, from the normative geometry (ovality, ellipse of the inner diameter of the pipe), from the manufacturing technology of the plunger (with the presence of the convexity of the root of the weld or grit on the inner surface of the pipe).

The technical result is achieved due to the fact that the sealing device for the plunger of the pipeline contains a means for introducing a sealing head, including a hollow cylindrical body with an attached flange, a manual drive containing a pin, with a rod installed inside it, at the end of which a sealing head containing a clamp with a cylinder mounted on it, a sealant, a wedge, at least three crackers covered by a rubber ring, a housing for the sealing head, a nut mounted on the clamp, and axle ring made with the possibility of axial movement of the housing of the sealing head relative to the nut, and in the housing of the sealing head there is a cylindrical hole in which the nut is mounted so that its upper horizontal surface is flush with the upper horizontal surface of the housing of the sealing head, while the nut equipped with a shoulder with which it is installed close to the lower inner surface of the housing of the sealing head.

The technical result is achieved in that the placement of the nut in such a way that its upper horizontal surface is flush with the upper horizontal surface of the housing of the sealing head, and that the nut is provided with a shoulder with which it is mounted closely to the lower inner surface of the housing leads to a decrease in height the sealing head as a whole, which allows for complete overlap of the plunger with a deviation from the vertical axis due to the height dimension, normative geometry or technol They are manufactured due to the smaller diameter of the sealing head assembly.

In addition, in the particular case of the implementation of the utility model, further comprises a sleeve with a shoulder located between the nut and the housing of the sealing head.

In addition, in the particular case of the implementation of the utility model, the clamp is made of steel amenable to hardening hardening.

In addition, in the particular case of the implementation of the utility model, the cylinder is made of steel amenable to hardening hardening.

In addition, in the particular case of the implementation of the utility model, the sleeve is made of bronze.

Information confirming the possibility of implementing a utility model The implementation of the claimed utility model is illustrated by drawings, where: in FIG. 1 shows a section along the main axis of the sealing head; in FIG. 2 shows a view of the sealing head in the operating position; in FIG. 3 shows the appearance of the sealing head assembly; FIG. 4 shows the appearance of the means for input / output of the sealing head;

in FIG. 5 shows a general view of the clip 6.

where in the drawings, the positions have the following notation:

1 - housing sealing head;

2 - cracker;

3 - wedge;

4 - sealant;

5 - cylinder;

6 - clip;

7 - a nut;

8 - sleeve;

9 - locking screw;

10 - rubber ring;

11 - washer;

12 - a lock ring;

13 - screw;

14 - pipe;

15 - pipeline;

16 - the place of welding of the pipe 14 to the pipe 15;

17 - rod handle;

18 - stock;

19 - steering wheel pintles 20;

20 - pinol;

21 - the helm of the housing means 24 for entering the sealing head;

22 - threaded nut;

23 - the body of the means 24 for inputting the sealing head;

24 - means for introducing a sealing head;

25 - ball valve;

26 - manometer;

27 - a flange;

28 - a shaft with a threaded connection for input / output of the sealing head into the outlet;

29 - the base of the clamp 6;

30 - a recess of a cylindrical shape in the clip 6;

31 - cylindrical mounting pad of the cylinder 5 to the clip 6;

32 - place of fastening of the screw 13;

33 - shaft with a threaded clip 6;

34 - internal thread of the shaft 33 for attachment to the device for input / output of the sealing head.

The sealing head of FIG. 1, 2, 3, and 5, contains a clamp 6, on which a sealant 4 is made, made of oil-resistant rubber, and is pressed by a wedge 3. Wedge 3 transfers force to crackers 2, which are located in the figured grooves of the housing 1 of the sealing head and having one degree of freedom . Crackers 2 are covered by a rubber ring 10, so that they are kept from falling out. The rubber ring 10 is tensioned by using the locking screw 9. A nut 7 is screwed onto the clamp 6 through the housing 1 of the sealing head, which is fixed by the washer 11 and locking ring 12. A sleeve 8 made of bronze is installed between the housing 1 of the sealing head and the nut 7.

The circlip 12 and the flange of the nut 7 exclude axial movement of the housing 1 of the sealing head relative to the threaded nut 7 and provide the possibility of transmitting force to the housing 1 of the sealing head of the nut 7.

The shape and seating depth of the housing 1 of the sealing head made in FIG. 1, 2, 3 provides a reduction in the overall and mounting dimensions of the entire sealing head (in particular, height), which allows it to be reliably placed for sealing in non-projected plungers, (made with a deviation from the vertical axis). In addition, in the housing 1 of the sealing head there are made at least three curly grooves in which at least three crackers 2 are installed, along which they move during installation and removal of the sealing head.

The nut 7 is an all-metal part with a shoulder separating the nut 7 into upper and lower parts, the upper outer surface of the nut 7 being threaded.

The clamp 6 is made all-metal, with a recess 30 of a cylindrical shape. The recess 30 is made in the form of a blind cylindrical hole, to such a depth HB that the residual wall thickness does not reduce the overall structural strength. The clamp 6 consists of a base 29 of the clamp 6, a cylindrical mounting plate 31 of the cylinder 5 to the clamp 6 and a shaft 33 with a thread of the clamp 6, made in accordance with FIG. 5, while the base 29 of the clamp 6 is made in the form of a plate with a diameter D1 and a height of HB. A shaft with a thread 33 of the clamp 6 is made with external and internal thread 34, while the external thread is necessary for axial movement of the clamp 6, when crushing the sealant 4, and the internal thread 34 is necessary for mounting the sealing head on the installation for input / output. The clamp 6 is made of steel, amenable to hardening hardening followed by heat treatment, which provides an increase in the rate of temporary tensile strength σ _in . As a retaining ring 12, a thrust spring ring external is applied, which allows you to apply more torque to the threaded nut 7. On the clamp 6, on the cylindrical mounting platform 31, at least two screws 13 are attached to the mounting points 32, cylinder 5, which provides moving the wedge 3 in the axial direction, and also provides the ability to seal the outlet, without extruding the seal 4 in both the axial and transverse directions. In this case, the cylinder is made of steel, amenable to hardening with subsequent heat treatment, which increases its service life and maintainability when reusing the sealing device for plungers, when installing and removing the latter.

To install the snap ring 12, pressing the washer 11 in the nut 7, a groove is made (not shown in the drawing).

Means 24 for introducing a sealing head (see FIG. 4) are known from patent No. RU 125671 U1, publ. 03/10/2013. The means 24 for introducing the sealing head contains a hollow body 23, to which the flange 27 is fastened on one side and the threaded nut 22 on the other. Inside the housing of the means for introducing the sealing 23 head 24, there is a pin 20 with a pin 20 mounted on it. Inside the quill 20 extends the stem 18, on which the handle 17 is fixed. The threaded end of the stem 18 is designed to hold the blocking head assembly (see Fig. 1-3) in the quill 20.

The steering wheel of the housing 21 of the means 24 for introducing the sealing head together with the threaded nut 22 of the sealing sealing head assembly (see Figs. 1-3), the steering wheels 19 of the pins 20 and the handle 17 of the stem 18 constitute a manual drive, which provides for feeding, disconnecting and removing the covering head in the assembly (Fig. 1-3) from the pipe 14. The flange 27 has a radial through threaded hole to which is connected via a tee (not shown in Fig. 3) a pressure gauge 26 and a ball valve 25 to control the tightness of the overlap of the pipe 14 and control the tightness of the place etc 16 boiling pipe 14 to the conduit 15.

The operation of the sealing device for the plunger of the pipeline is as follows.

The sealing head is installed in the internal cavity of the pipe 14 through the shut-off valve using the means 24 for introducing the sealing head by counterclockwise rotation of the steering wheel 19 of the pin 20, which transmits the rotation of the nut 7. When the nut 7 is rotated, it is pressed against the clamp 6 using the threaded connection and through the housing 1 of the sealing head presses with force on the crackers 2, the crackers 2 move along the wedge 3 in the radial direction and abut against the walls of the pipe 14 of the pipe 15, then the compression force along the axis is transmitted to the seal isator 4, which is compressed from the side of the wedge 3 and clamp 6, thereby changing the geometry of the outer surface, i.e. it becomes convex and increases in diameter, thereby blocking the gap between the sealing head and the nozzle 14 of the pipe 15, ensuring tightness from the pumped medium.

The sealing head is removed by rotating the pin 20 clockwise, which transmits rotation to the nut of the threaded 22, thereby moving the wedge 3 and the clamp 6 in an axis in the opposite direction from each other, the compression force acting on the seal 4 decreases, and it takes its original form. Then, using the retaining ring 12, the nut 7 lifts the clamp 6 behind it, in the figured grooves of which crackers are installed 2. Under the action of the elastic forces of the rubber ring 4, the crackers 2 are removed from the walls of the plunger pipe, releasing the sealing head.

The use of the proposed sealing head allows for reliable overlap of non-projected plungers (made with a deviation from the vertical axis) on the existing pipeline without performing expensive work on cutting a section of the pipeline or using a typical repair structure from split tees or couplings, with filling the interwall space with a composite composition, while reducing height dimensions and the total mass of the sealing head allows you to perform work safer, without reducing the overall Nost repair design.

Claims (5)

1. A sealing device for a pipe plunger, comprising means for introducing a sealing head, including a hollow cylindrical body with an attached flange, a manual actuator containing a pin, with a rod installed inside it, at the end of which a sealing head is mounted, containing a clamp with a cylinder mounted on it, a sealant, a wedge, at least three crackers covered by a rubber ring, a housing of the sealing head, a nut mounted on the clamp and a retaining ring configured to the movement of the housing of the sealing head relative to the nut, characterized in that the housing of the sealing head has a cylindrical hole in which the nut is mounted so that its upper horizontal surface is flush with the upper horizontal surface of the housing of the sealing head, the nut being provided with a shoulder, with which it is installed flush with the lower inner surface of the housing of the sealing head. 2. The sealing device according to p. 1, characterized in that it contains a sleeve with a shoulder located between the nut and the housing of the sealing head. 3. The sealing device according to p. 1, characterized in that the clamp is made of steel, amenable to hardening hardening. 4. The sealing device according to claim 1, characterized in that the cylinder is made of steel, amenable to hardening hardening. 5. The sealing device according to claim 2, characterized in that the sleeve is made of bronze.

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