CN103047506A - Pipeline compensator with seal cavity designed with inclined plane - Google Patents

Abstract

The invention relates to a pipeline compensator with a sealing chamber set as an inclined plane, comprising a core tube, an outer casing and a flange, the surface of the flange is set as an inclined plane, the surface of the outer sleeve is also set as an inclined plane, and the included angle A between the inclined plane of the flange and the outer surface of the core tube Greater than 60 degrees and less than 80 degrees, the angle between the outer sleeve slope and the core tube is equal to the angle A; the sealing cavity is provided with sealing packing and a rough ring, and the two ends of the rough ring are provided with V-shaped grooves, and the included angle of the V-shaped groove is 140 Spend. The invention utilizes the inclined surface of the sealing chamber and the spacer ring to make the filler squeeze to the outer surface of the core tube when being pressed, so that the density of the sealing filler is uniform and the sealing effect is enhanced. The invention not only has simple structure and low cost, but also is convenient for installation and maintenance, and the service life of the compensator is increased by more than 20%.

Description

Pipeline compensator with sealing cavity set as inclined plane

technical field

The invention relates to the technical field of pipeline compensators, in particular to a compensator in which the end face of a sealing cavity is set as an inclined plane structure.

Background technique

Compensation devices are generally required to be installed and used in pipelines in electric power, petroleum, chemical industry, heat power and other industries. Existing compensation devices usually include rotary compensators, sleeve compensators, spherical compensators, etc. displacement. In particular, pipelines conveying high-temperature and high-pressure media have high requirements for compensators. The compensators must not only have sufficient displacement compensation, but also have the characteristics of good sealing performance and long service life.

The sealing cavities of existing rotary compensators, sleeve compensators, and spherical compensators are generally plane right-angle structures, that is, two adjacent surfaces of the sealing cavity are perpendicular to each other. The flange used to compress the sealing packing in the sealing chamber is also a conventional plane design, that is, the sealing packing in the sealing chamber is pressed through the flange plane, and the pressure exerted by the flange plane on the sealing packing will gradually decay with the increase of the length. At present, the plane right-angle structure of the sealing chamber of the existing compensator will lead to uneven density of the sealing packing up and down, resulting in a decrease in the sealing performance of the compensator. After the core tube of the compensator works, the compensator is easy to leak due to poor packing seal, resulting in a decrease in the service life of the compensator, increasing the maintenance cost of the user, and sometimes even having to stop production of the pipeline to replace the compensator, resulting in greater losses.

Contents of the invention

In view of the deficiencies in the sealing chamber and sealing packing of the existing compensator above, the purpose of the present invention is to provide a compensator whose end face of the sealing chamber is set as an inclined plane structure, which can effectively Improve the uniformity of the compensator sealing packing and improve the sealing effect.

The purpose of the present invention is achieved by adopting the following technical solutions:

The pipeline compensator whose sealing cavity is set as an inclined plane includes a core tube of the compensator, an outer sleeve and a flange. The core tube is sleeved in the outer sleeve, and the outer sleeve is connected to the flange. Position ring, one end face of the flange is provided with a convex ring, the flange convex ring and the outer surface of the core tube, the limit ring and the inner surface of the outer sleeve form a sealed cavity;

The surface of the flange protruding ring is set as an inclined plane, and the inner surface of the outer casing limit ring is also set as an inclined plane, and the two inclined planes are arranged symmetrically to each other and constitute two end surfaces of the sealing chamber.

As a preferred technical solution of the present invention, the angle between the inclined surface of the flange convex ring and the outer surface of the core tube is set as an angle A, and the angle A is less than 90 degrees, and the inclined surface of the outer casing limit ring and the outer surface of the core tube The angle between the surfaces is equal to angle A.

As a preferred technical solution of the present invention, the angle A is greater than 60 degrees and less than 80 degrees.

As a preferred technical solution of the present invention, a sealing packing is provided in the sealing cavity, and a rough ring is provided in the middle of the sealing packing.

As a preferred technical solution of the present invention, V-shaped grooves are respectively provided on the two end surfaces of the ugly ring, and the included angle of the V-shaped grooves is set as an angle C, and the angle C is greater than 90 degrees.

As a preferred technical solution of the present invention, the C angle is greater than 120 degrees and less than 150 degrees.

The beneficial effects of the present invention are: compared with the prior art, the present invention sets the end surface of the sealing chamber of the compensator as an inclined plane, and simultaneously sets the packing pressing surface of the flange as an inclined plane structure, and adds sealing packing to the sealing chamber to half , put in the spacer ring, and then continue to add the other half of the sealing packing; this can effectively improve the uniformity of the sealing packing, thereby improving the sealing performance of the compensator.

The present invention utilizes the inclined plane structure of the sealing chamber and the spacer ring placed in the sealing packing to squeeze the packing to the outer surface of the core tube when the packing is pressed, so that the density of the sealing packing close to the outer surface of the core tube is strengthened and more uniform, and the compensator is strengthened The sealing effect of the sealing packing is not only simple in structure and low in cost, but also convenient in installation and maintenance, and the service life of the compensator is increased by more than 20%.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment the present invention will be further described:

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a schematic structural view of the sealing chamber of the present invention adding fillers and spacers;

Fig. 3 is a schematic structural view of the spacer ring of the present invention.

Detailed ways

Embodiment one

As shown in Figure 1, Figure 2 and Figure 3, the sealing chamber is set as a pipeline compensator with an inclined plane, including a compensator core tube 1, an outer sleeve 3 and a flange 2, and the end of the outer sleeve 3 is welded with a tapered tube 4, The core tube 1 is sleeved in the outer casing 3, the outer casing 3 is connected to the flange 2, the inner surface of the outer casing 3 is provided with an annular limit ring, and one end of the flange is provided with a convex ring, and the flange protrudes The ring and the outer surface of the core tube 1, the limit ring and the inner surface of the outer sleeve 3 form a sealed cavity; the surface of the flange convex ring is set as an inclined plane 21, and the inner surface of the outer sleeve limit ring is also set as an inclined plane 31, two The slopes are arranged symmetrically to each other and constitute two end surfaces of the sealing cavity.

In this embodiment, the angle between the slope 21 of the flange convex ring and the outer surface of the core tube 1 is set as angle A (not shown in the figure), and the angle A is less than 90 degrees. The included angle between the slope 31 and the outer surface of the core tube 1 is equal to the angle A, and the angle A is greater than 60 degrees and less than 80 degrees.

As shown in FIG. 1 , the included angle between the flange slope 21 and the vertical plane of the axis of the core tube 1 is an angle B, and the angle between the outer casing limiting ring slope 31 and the vertical plane of the core tube 1 axis is also an angle B. As a preferred embodiment of the present invention, the angle A is 72 degrees, and the angle B is 18 degrees.

As shown in Fig. 2 and Fig. 3, sealing packing 6 is arranged in the sealing cavity of the described compensator, and a crude ring 5 is provided in the middle of the sealing packing 6, and V-shaped grooves are respectively arranged on the two end faces of the crude ring 5, and the V-shaped grooves The included angle of is set as C angle, and C angle is greater than 120 degrees and less than 150 degrees. As a preferred embodiment of the present invention, the angle C is 140 degrees.

Embodiment two

The method for improving the uniformity of the compensator sealing packing includes the following steps: (1) setting the two end faces of the compensator sealing cavity as inclined plane structures;

(2) When half of the sealing packing is added into the sealing cavity, put in the spacer ring, and then continue to add the other half of the sealing packing;

(3) Install the two end faces of the sealing chamber opposite to each other, so that when one of the end faces moves relative to the other end face, the force of the two end faces acting on the sealing packing points to the axial direction of the compensator.

The included angles between the two end faces of the sealing cavity and the axis of the compensator are equal, and are set as angle A, and the angle A is greater than 60 degrees and less than 80 degrees; the two end faces of the spacer ring are respectively provided with V-shaped grooves , The included angle of the V-shaped groove is set as a C angle, and the C angle is greater than 120 degrees and less than 150 degrees. As a preferred embodiment of the present invention, the angle A is 72 degrees, the angle B is 18 degrees, and the angle C is 140 degrees.

For the compensator with pressure ≥ 5.0MPa, the present invention adds a spacer ring in the middle of the sealing packing, so that the upper and lower packings of the sealing chamber are more uniform and compact, which can not only ensure the density of the sealing packing, but also ensure the stability of the compensator under high pressure. Sealing performance, especially suitable for rotary compensators with a diameter of DN700 and a pressure of 8.0MPa, which can increase the service life of the compensator by more than 20%. Of course, the present invention is not limited to the above embodiments, and any technical solution that simply transforms or equivalently replaces the present invention should be considered to fall within the protection scope of the claims of the present invention.

Claims (6)

1. A pipeline compensator with a sealing cavity set as an inclined plane, comprising a compensator core tube, an outer sleeve and a flange, the core tube is sleeved in the outer sleeve, and the outer sleeve is connected to the flange, and it is characterized in that: the outer sleeve The inner surface of the tube is provided with an annular limit ring, and one end surface of the flange is provided with a protruding ring, and the flange protruding ring forms a sealed cavity with the outer surface of the core tube, the limit ring and the inner surface of the outer sleeve; The surface of the flange protruding ring is set as an inclined plane, and the inner surface of the outer casing limit ring is also set as an inclined plane, and the two inclined planes are arranged symmetrically to each other and constitute two end surfaces of the sealing chamber. 2. The pipeline compensator with the sealing chamber set as an inclined plane according to claim 1, characterized in that: the angle between the inclined plane of the flange convex ring and the outer surface of the core tube is set as an angle A, and the angle A is less than 90° degree, the angle between the inclined plane of the outer sleeve limit ring and the outer surface of the core tube is equal to the angle A. 3. The pipeline compensator with the sealing chamber set as an inclined plane according to claim 2, characterized in that: the angle A is greater than 60 degrees and less than 80 degrees. 4. The pipeline compensator with the sealing cavity set as an inclined plane according to claim 1 or 2, characterized in that: the sealing cavity is provided with a sealing packing, and a rough ring is provided in the middle of the sealing packing. 5. The pipeline compensator with the sealing cavity set as an inclined plane according to claim 4, characterized in that: the two end faces of the ugly ring are respectively provided with V-shaped grooves, and the included angle of the V-shaped grooves is set as C angle , C angle is greater than 90 degrees. 6. The pipeline compensator with the sealing chamber set as an inclined plane according to claim 5, characterized in that: the angle C is greater than 120 degrees and less than 150 degrees.

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