RU2789764C1 - Device for fixing adjacent plastic pipes for their screwing and unscrewing - Google Patents

Abstract

FIELD: mechanical engineering.

SUBSTANCE: invention relates to the field of mechanical engineering, in particular to devices for fixing adjacent plastic pipes for their screwing and unscrewing at the place of their laying. The device contains a vise mounted on height-adjustable supports, while the vise comprises a detachable body consisting of a lower fixed and upper movable units, which are connected by a swivel joint. In the annular grooves of the nodes, replaceable liners are rigidly fixed, and the lower and upper nodes and replaceable liners are made in the form of cylindrical annular segments in cross section, in the middle part of the liners in response to the coupling of one screwed and unscrewed pipe, annular grooves are made, while the inner surfaces of the body and liners in the end the parts on the inlet side of the other adjacent pipe to be screwed and unscrewed are made conical, and the smallest diameter of the conical surface of the body is not greater than the largest inner diameter of the liners.

EFFECT: ensuring the alignment of the pipes being screwed together and eliminating the transverse load on the threaded part.

3 cl, 8 dwg

Description

The invention relates to the field of mechanical engineering, in particular to devices for screwing and unscrewing pipes, especially flexible plastic pipes, including, in place of their laying.

A device for screwing and unscrewing pipes, including height-adjustable stops, a clamp for fixing the pipe.

The disadvantage of the known device is the significant complexity of screwing and the difficulty of ensuring the alignment of the connected pipes.

A device for screwing and unscrewing cylindrical parts is known, containing a vise mounted on an adjustable stop, including a detachable body, the lower fixed and upper movable nodes of which are connected by a swivel, replaceable liners placed in the annular grooves of the nodes, while the lower and upper nodes and replaceable liners are made in the form of cylindrical annular segments in cross section, a latch (see the Catalog of Progress-special equipment LLC website: www: office@p-so.ru).

The disadvantages of the known device are the significant complexity of screwing and the difficulty of ensuring the alignment of the pipes to be connected due to the lack of a guide and the displacement of the pipe to be screwed to the side when a moment is applied with a lever wrench, for example, a tape wrench. When making up plastic pipes, applying a transverse load from the wrench can damage the threads.

The closest analogue of the claimed invention is a device for fixing adjacent screwed and unscrewed pipes, containing a vice mounted on height-adjustable supports (see patent EP No. 3119557 B1, IPC F16L 1/09, pub. 29.04.2020, bull. 18).

The disadvantage of this device is the significant complexity of screwing and unscrewing, the difficulty of ensuring the alignment of the connected pipes.

The technical objective of the claimed invention is to reduce the complexity and expand the functionality in terms of ensuring the alignment of the pipes being screwed and eliminating the transversely directed load on the threaded part.

The solution of this problem is achieved by the fact that in the device for fixing adjacent plastic pipes for their screwing and unscrewing, which contains a vice installed on height-adjustable supports, according to the technical solution, the vice contains a split housing, consisting of a lower fixed and upper movable units, which are connected by a hinge at the same time, replaceable liners are rigidly fixed in the annular grooves of the nodes, and the lower and upper nodes and replaceable liners are made in the form of cylindrical annular segments in cross section, in the middle part of the liners in response to the coupling of one screwed and unscrewed pipe, annular grooves are made, while the inner surfaces of the body and liners in the end part from the side of supply of another screwed and unscrewed adjacent pipe are made conical, and the smallest diameter of the conical surface of the body is not greater than the largest inner diameter of the liners.

Vertical through coaxial holes are made in the upper movable unit and the insert, and a scale is applied to the outer surface of the housing.

An annular groove with a split spring ring installed in it is made on the outer surface of the end part of the housing from the side of the supply of the adjacent pipe to be screwed and unscrewed.

The essence of the invention is illustrated in the drawing.

In FIG. 1 shows a diagram of a device with screwed pipes;

In FIG. 2 - section A-A in Fig. 1;

In FIG. 3 - section B-B in Fig. 1;

In FIG. 4 is view B in FIG. 1;

In FIG. 5 - section Г-Г in Fig. 1;

In FIG. 6 is a side view (view D) of FIG. 1;

In FIG. 7 - option of execution of a device with a pipe fixing with a tape key;

In FIG. 8 - view G in Fig. 7.

The device for fixing adjacent plastic pipes for their screwing and unscrewing contains a vise 1 (Fig. 1), including a detachable cylindrical body 2, consisting of a lower fixed 3 and an upper movable node 4, interconnected by a swivel joint 5 (Fig. 2). The swivel joint 5 is made with the possibility of rotation of the upper node 4 around the axis 6 with a complete horizontal displacement of the upper node 4 from the lower node 3.

The lower fixed node 3 of the housing 2 is rigidly connected to a height-adjustable support 7, placed, for example, on a fixed pedestal 8.

The lower fixed 3 and upper movable 4 nodes are made in the form of cylindrical annular segments in cross section with the possibility of forming a multistage axisymmetric hole 9, including a conical surface 10 in the middle part and cylindrical parts 11 and 12 along the edges. In the annular grooves of nodes 3 and 4, replaceable liners 13 and 14 are rigidly fixed, also made in the form of cylindrical annular segments in cross section. The cylindrical hole 11 is made in response to replaceable liners 13 and 14, which are made in response to the screwed pipe 15 and the sleeve 16 of the largest diameter. In the middle part of the liners 13 and 14, an annular groove 17 is made in response to the coupling 16. The liners 13 and 14 are rigidly fixed to the lower 3 and upper 4 nodes, for example, by screws 18.

The inner surface of the body 2 and the liners 13 and 14 in the end part from the side of the supply of another screwed and unscrewed adjacent pipe are made conical 19 with the possibility of forming a single surface with a conical surface 10.

The length of the inner cylindrical section 20 of the liners 13 and 14 from the side of the conical surface 19 is at least (1.5-2.0)d, (d is the diameter of the pipe 15). The angle α of the conical surface 10 and 19 is selected within 20-25 °.

In the upper movable node 4 of the housing 2 and the liner 14 can be made vertical through coaxial holes 21 (Fig. 3), for example, rectangular in plan, along the length of the cylindrical section 20 (not shown in Fig.) (Fig. 4), and a scale is applied on the outer surface of the housing 2. Opposite the scale indicators, their distances can be marked (not shown in the figure), for example, from the left end of the groove 21.

On the opposite side of the hinge assembly 5, the lower fixed 3 and upper movable 4 nodes of the body 2 can be provided with longitudinal flanges 22 and 23 (Fig. 2) with open through grooves 24 and 25. Rigid fixation of the liners 13 and 14 to the pipe 15 is carried out, for example , hinged bolt 26, passed through the grooves 24 and 25. The bolt 26 can be connected to the axis 27 through a threaded through hole (not shown in Fig.) made perpendicular to the axis 27 in its middle part. The axis 27 is installed parallel to the axis of the pipe 15 and is fixed in the lower part of the flange 22, for example, semi-collars 28 with the possibility of rotation relative to the lower fixed node 3.

The pipe 15 with the coupling 16 is also installed, for example, on an additional height-adjustable support 29.

On the outer surface of the end cylindrical section 12 of the fixed 3 and movable 4 assemblies of the body 2, annular grooves (Fig. 5) can be made to form an annular groove (not shown in the Fig.), in which a reciprocally made split spring ring 30 is installed, equipped, for example , rings 31.

Adjacent screwed pipe 32 is mounted, for example, on adjustable supports 33 and 34 mounted on a common pedestal 35.

Supports 33 and 34 are equipped, for example, rollers (Fig. 6) (not indicated in Fig.).

Fixation of the pipe 15 by means of inserts 13 and 14 can be carried out with a strap key 36 (Fig. 7 and 8) with a locking device (not shown in Fig.).

The operation of the device for fixing adjacent plastic pipes for their screwing and unscrewing is carried out as follows.

The pipe 15 with the coupling 16 is installed on the insert 13 of the lower fixed assembly 3, which is made in response to the pipe 15 and the coupling 16. Next, the upper movable assembly 4 is lowered onto the lower fixed assembly 3 by turning by means of a swivel 5. Through the grooves 24 and 25, the hinged bolt 26 is placed in a vertical position and is screwed onto the axis 27, rigidly fixing the nodes 3,4 with the pipe 15 by means of inserts 13 and 14. In order to avoid deformation of the pipe 15, the bolt 26 is tightened with a torque wrench (not shown in Fig.). Next, the split spring ring 30 is installed on the annular groove (not shown in the figure) of the liners 13 and 14, ensuring their fixation.

Adjacent screwed pipe 32 is brought to the end part of the liners 13, 14, the diameter of which is greater than the diameter of the pipe 32. This provides free passage of the pipe 32 into the conical surface 10 and 19. Since the cylindrical section 20 of the liners 13 and 14 is made in response to the pipe 32, and is from one and a half to two diameters of pipes 15 and 32, pipe 32 occupies a coaxial position with pipe 15. Further, for example, with a tape key (not shown in Fig.), pipe 32 is screwed to the coupling 16.

The pipe 32 screwing can be controlled visually, through the groove 21 and the applied scale (not shown in the figure).

When fixing the pipe 15 (Fig. 7 and 8) with a vice 1 using a tape key 36, the bolted connection of nodes 3 and 4 is excluded. The duration of fixing the pipe 15 with liners 13 and 14 is reduced to provide the required force. In this case, the pedestal 8 with stops 7 and 29 can be additionally held during installation of the pipeline in the field.

Claims (3)

1. A device for fixing adjacent plastic pipes for their screwing and unscrewing, containing a vise mounted on height-adjustable supports, characterized in that the vise contains a split housing, consisting of a lower fixed and upper movable nodes, which are connected by a swivel joint, while in the annular replaceable liners are rigidly fixed in the grooves of the nodes, and the lower and upper nodes and replaceable liners are made in the form of cylindrical annular segments in cross section, annular grooves are made in the middle part of the liners in response to the coupling of one screwed and unscrewed pipe, while the inner surfaces of the body and liners in the end part with the sides of the supply of another screwed and unscrewed adjacent pipe are made conical, and the smallest diameter of the conical surface of the body is not greater than the largest inner diameter of the liners. 2. The device according to claim 1, characterized in that vertical through coaxial holes are made in the upper movable unit and the insert, and a scale is applied to the outer surface of the housing. 3. The device according to claim 1 or 2, characterized in that on the outer surface of the end part of the housing from the side of the supply of the adjacent pipe to be screwed and unscrewed, an annular groove is made with a split spring ring installed in it.

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