RU139682U1 - DEVICE FOR EDITING PIPE END OVALITY - Google Patents

Abstract

1. A device for correcting the ovality of the ends of the pipes, including an upper support and a lower support, a hydraulic jack, a hydraulic pump, a high pressure sleeve, characterized in that an axis and a thrust are additionally introduced, moreover, the upper support is telescopically sequentially mounted on the axis, connected to the axis by screws, a hydraulic jack with a hollow rod and a rod having a threaded connection with an axis and a lower support, a spacer and a spacer. 2. The device according to claim 1, characterized in that the spacer and spacer are installed between the upper support and the end surface of the hydraulic jack housing, the spacer having the shape of a hollow cylinder with a rectangular radial cutout, and the insert is in the form of a solid cylinder with a rectangular radial cutout with a diameter equal to the inner the diameter of the spacer and the outer diameter of the jack rod, and the width of the rectangular groove of the spacer is equal to the side of the square of the axial cross section.

Description

The utility model relates to the processing of metals by pressure and can be used to correct the roundness of the end section of the pipe.

A device for editing ovality pipes. The device consists of upper and lower supports, a hydraulic jack, support strut, a hydraulic pump and a high pressure sleeve (see the Guidance document of Transneft, JSC “Welding in the Construction and Repair of Main Oil Pipelines”, RD-25.160.00-KTN-011 -10, published by JSC Transneft, Moscow, 2009, p.155 or Internet resource: http://www.skonline.ru/doc/57769.html - 05/12/2013).

In terms of the set of distinguishing features, this device is closest to the device in question and is taken as a prototype.

The disadvantage of this device is the impossibility of increasing the maximum distribution of the pipe without disassembling the device and changing the shoes (supports), the need for its use strictly in the vertical position, which requires appropriate installation of the pipe.

Signs of the prototype, coinciding with the essential features of the claimed utility model include an upper support and a lower support, a hydraulic jack, a hydraulic pump, a high pressure sleeve.

The objective of the device under study is to expand the functionality and ensure ease of assembly, installation and disassembly of the device.

As a technical result of the device under consideration is an increase in the maximum distribution of the pipe without changing the supports and the possibility of its application when the ovality of the pipe deviates from the vertical position.

The set of essential features characterizing a new technical solution is a device for correcting the ovality of pipe ends, including an upper support and a lower support, a hydraulic jack, a hydraulic pump, a high pressure sleeve, an axle and a thrust are additionally introduced according to the utility model, and the upper support is telescopically sequentially mounted on the axis, connected to the axis with a screw, a hydraulic jack with a hollow rod and a rod having a threaded connection with an axis and a lower support, a spacer and a spacer.

A spacer and a spacer are installed between the first support and the end surface of the hydraulic jack body, and the spacer has the shape of a hollow cylinder with a rectangular radial cutout, and the insert has the form of a continuous cylinder with a rectangular radial cutout with a diameter equal to the inner diameter of the spacer and the outer diameter of the jack rod, and the width The rectangular groove of the spacer is equal to the side of the square of the cross section of the axis.

The considered technical solution meets the conditions of patentability according to the criteria of “novelty” and “industrial applicability”.

A utility model is illustrated in FIG. 1 and photographs of FIG. 2 and FIG. 3. In FIG. 1 is a diagram of an expandable device for nozzles, and in the photographs, an expandable device for nozzles installed in a pipe. In Fig. 2 it can be seen that the device is installed at a certain angle to the vertical axis of the pipe, and in Fig. 3, the spacer (to the left of the device) and the spacer (to the right of the device) are separately shown.

The figures represent the following notation:

1 - axis;

2 - thrust;

3 - upper support;

4 - lower support;

5 - spacer;

6 - a spacer;

7 - a hydraulic jack;

8 - hydraulic pump;

9 - a sleeve of a high pressure;

10 - drive handle;

11 - crane.

In accordance with GOST 550-75 “Seamless steel pipes for the oil refining and petrochemical industries,” the ovality of the pipes can reach ± 1.25% of the nominal diameter DN. During transportation, loading and unloading and as a result of other mechanical influences, ovality may increase.

According to RD-25.160.00-KTN-011-10 “Welding in the construction and repair of main oil pipelines” the tolerance for ovality of pipes (the ratio of the difference between the largest and smallest diameters to the nominal diameter) must not exceed 1% at the ends of pipes with a wall thickness of less than 20 mm and 0.8% at the ends of pipes with a wall thickness of 20 mm or more.

To bring the ends of the pipes to regulatory requirements, an expandable device was developed for the nozzles.

The device is designed to correct the ovality of the ends of pipes Du 700-1000 mm with a wall thickness of up to 16 mm, strength class K42-K60. It is a column type spacer power device. The supporting surfaces of the upper 3 and lower 4 supports are made with a curvature corresponding to the inner diameter of the pipe being repaired. Axis 1 connects all the elements of the device, which provides quick and convenient assembly, installation and disassembly of the device.

The upper 3 and lower 4 bearings transmit radial force to the pipe, and rod 2 serves to compensate for residual deformation. The upper 3 and lower 4 supports are used for a specific pipe diameter using a set of replacement parts with the corresponding marking.

On the axis 1, the upper support 3, connected to the axis with a screw, a hydraulic jack 7 with a hollow rod and a rod 2 having a threaded connection with the axis and the lower support, a spacer 5 and a spacer 6, designed to increase the working surface of the device, are telescopically sequentially mounted.

The spacer 5 and the spacer 6 are installed between the upper support 3 and the end surface of the hydraulic jack body 7, and the spacer 6 is in the form of a hollow cylinder with a rectangular radial cutout, and the spacer 5 is in the form of a continuous cylinder with a rectangular radial cutout with a diameter equal to the inner diameter of the spacer 6 and the outer diameter of the jack rod, and the width of the rectangular groove of the spacer 5 is equal to the side of the square of the cross section of axis 1.

The hydraulic jack 7 is made with a hollow rod (for example, DP20P50).

The hydraulic pump 8 has a crane 11 and is designed to pump hydraulic fluid into the hydraulic jack 7 using the drive handle 10 through the high pressure sleeve 9 connecting the hydraulic jack 7 to the hydraulic pump 8.

Rod 2 is made in the form of a sleeve in the middle of which a ring with holes for the handles is installed. The upper and lower parts of the sleeve are threaded with different directions of the helical surface.

Preparing the device for use:

Prepare and attach the jack to the pump. It is allowed to seal the threads with FUM tape when connecting the sleeve to the pump.

If necessary, remove the upper movable support 3 from the axis 1 by unscrewing the screw 12 through the holes in the support.

Install hydraulic jack 7 on the axle.

Install, secure the upper support with the screw back to the axis 1 rod.

Device application.

Use the upper 3 and lower 4 supports for a specific pipe diameter using a set of replacement parts with the corresponding marking. Device use:

install, fasten the device to the pipe. In this case, the axis of the device should be in the axis of the smallest pipe diameter. Before installation, rod 2 must be fully turned clockwise. After installing the device, unscrew the rod counterclockwise until the support rests in the pipe.

Visually check that the device is installed stably and without distortions in relation to the pipe.

Perform swinging movements with the drive handle 10 of the hydraulic pump, forcing the hydraulic fluid into the hydraulic jack 7 and extending the rod to correct ovality, hold the jack for 3-5 minutes in the working position.

Bring hydraulic jack 7 to its original position, relieving pressure using crane 11.

Carry out pipe measurements and, if the results are unsatisfactory, repeat the operation using the spacer 5 and spacer 6. To do this, extend the hydraulic jack of the jack 7 for full travel, then insert the spacer 5, relieve pressure and install the spacer 6 on the axis 1. Repeat the hydraulic fluid injection operation in jack, pushing the rod to correct ovality. The spacer allows you to increase the distribution of the pipe by 40 mm.

After finishing work, dismantle the device from the pipe.

The use of a device for correcting the ovality of pipe ends expands the functionality and provides the convenience of assembly, installation and disassembly of the device.

In addition, the maximum distribution of the pipe increases without changing the supports and the possibility of its use when the ovality of the pipe deviates from the vertical position.

Claims (2)

1. A device for correcting the ovality of the ends of the pipes, including an upper support and a lower support, a hydraulic jack, a hydraulic pump, a high pressure sleeve, characterized in that an axis and a thrust are additionally introduced, moreover, the upper support is telescopically sequentially mounted on the axis, connected to the axis by screws, a hydraulic jack with a hollow rod and a rod having a threaded connection with an axis and a lower support, a spacer and a spacer. 2. The device according to claim 1, characterized in that the spacer and the spacer are installed between the upper support and the end surface of the hydraulic jack housing, the spacer having the shape of a hollow cylinder with a rectangular radial cutout, and the insert has the form of a solid cylinder with a rectangular radial cutout with a diameter, equal to the inner diameter of the spacer and the outer diameter of the jack rod, and the width of the rectangular groove of the spacer is equal to the side of the square of the axial cross section.

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