CN212361162U - Rotary compensator - Google Patents

Abstract

The utility model relates to a rotary compensator, including the inner tube, the outer tube, the reducing pipe, sealed flange, the outer tube suit is on the inner tube, the one end of inner tube stretches into in the outer tube, sealed flange suit is on the inner tube, its one end stretches into in the outer tube, be equipped with annular inner boss on the internal surface of outer tube, be equipped with annular outer boss on the surface of inner tube, it is equipped with the sealing filler to stretch into between the one end of outer tube at annular inner boss and sealed flange, be provided with slider or end face seal spare in the cavity that forms between annular outer boss and annular inner boss, the outer tube is provided with the fender ring with the junction of reducing pipe. The utility model discloses can directly effectually block scouring of medium to gland packing, can also effectively prevent the medium to carry oxygen and get into gland packing chamber, avoid filling because of the sealed inefficacy that oxidation, ablation lead to.

Description

Rotary compensator

Technical Field

The utility model relates to a rotary compensator.

Background

At present, rotary compensators are increasingly widely used in heat pipelines. The rotary compensator has the advantages of high safety performance, convenience in design, large compensation amount, high economical efficiency of pipeline operation, diversified installation modes and types and the like, and is a product which is preferred by design houses and application units such as thermal power plants and the like. The main technical core of the rotary compensator lies in the sealing technology, and although people are always improving the sealing performance of the rotary compensator, the rotary compensator still has the possibility of leakage in the working process, and the reasons for the leakage are as follows:

1. ablation in an aerobic state at high temperature.

The rotary compensator operates at a high temperature for a long time, and the ablation amount of the sealing material (graphite, etc.) in a high-temperature aerobic state is reduced in volume due to contact with oxygen, thereby causing leakage. Therefore, controlling the amount of contact between the sealing filler and oxygen is one of the most important means for ensuring long-term sealing.

2. The filler is worn during operation.

The inner pipe and the outer sleeve of the rotary compensator cannot be absolutely smooth (namely, the friction coefficient is 0), so that the packing is abraded due to the relative rotation of the inner pipe and the outer sleeve when the rotary compensator works, part of the packing is easily lost from an assembly gap due to the fact that the packing is broken into pieces and powder, the volume of the packing in a sealing cavity is reduced, the sealing pressing force is reduced, and leakage occurs.

3. Wear from oxidation of the seal cavity surfaces.

After the rotary compensator is used for a long time, under the influence of medium adverse factors (such as chloride ions, humidity and temperature) in a pipeline, a contact surface of a sealing cavity and a sealing material is corroded to form unevenness, and the packing is easily abraded under the working state of the rotary compensator, so that part of the sealing packing is in a fragment powder state and is easily lost from an assembly gap, the volume of the packing in the sealing cavity is reduced, the sealing pressing force is reduced, and leakage is caused.

4. The chemical reaction of the seal packing with the media (high temperature steam, high temperature hot water, etc.) is lost.

Because the medium can react with the sealing filler at high temperature (for example, C + H)₂O (high temperature) ═ CO + H₂) The solid volume of the sealing filler is reduced, the sealing performance is reduced, and leakage is easy to occur.

5. And (5) scouring the sealing packing by the medium under a high-pressure state.

Under the working condition, the medium in the high-temperature and high-pressure state in the rotary compensator easily enters the sealing cavity from the assembly gap to form strong impact force on the sealing filler, and the sealing filler can be lost under the flushing of the high-temperature and high-pressure medium after long-term use, so that the sealing performance is reduced.

Therefore, it is an objective of those skilled in the art to further improve the sealing performance of the rotary compensator.

Disclosure of Invention

In order to wash away of medium to sealing filler under effective high-pressure state, reduced the loss of rotary compensator sealing material in fit-up gap under operating condition, the utility model provides a rotary compensator with better sealing performance.

Rotary compensator includes inner tube, outer tube, reducing pipe, sealed flange that compresses tightly, the outer tube suit is on the inner tube, the one end of inner tube stretches into in the outer tube, sealed flange suit is on the inner tube, its one end stretches into in the outer tube, be equipped with annular inner boss on the internal surface of outer tube, be equipped with annular outer boss on the surface of inner tube, it is equipped with the sealing filler to stretch into between the one end of outer tube at annular inner boss and sealed flange, be provided with slider or end face seal spare in the cavity that forms between annular outer boss and the annular inner boss, the outer tube is provided with the fender ring with the junction of reducing pipe.

In order to prevent the medium from washing the sealing filler as much as possible, the inner diameter of the baffle ring is the same as that of the inner pipe, so that the inner wall of the baffle ring and the inner wall of the inner pipe are on the same plane.

In order to solve the potential safety hazard problem caused by the butt joint of the outer sleeve and the reducer pipe in a welding mode, the outer sleeve and the reducer pipe are of an integrally formed integrated structure.

In order to avoid the sealing filler from generating a gap due to normal abrasion in long-term use so as to influence the sealing performance of the whole rotary compensator, the outer sleeve is provided with a sealing filler filling device.

The sliding member is a ball or a sliding ring.

The utility model discloses an increase and keep off the ring, not only can directly effectually block that the medium is to the washing away of gland packing, can also effectively prevent the medium to carry oxygen and get into the gland packing chamber, avoid packing because of the sealed inefficacy that oxidation, ablation lead to.

Drawings

Fig. 1 is a schematic structural diagram (medium flows to the right) of embodiment 1 of the present invention.

Fig. 2 is a schematic structural diagram (medium flows to the right) of embodiment 1 of the present invention.

FIG. 3 is a schematic structural diagram of embodiment 2 of the present invention

In fig. 1-3, 1 is an inner pipe, 2 is a stud, 3 is a nut, 4 is a gasket, 5 is a sealing and pressing flange, 6 is an outer sleeve, 7 is sealing filler, 8 is an annular inner boss, 9 is a sliding piece, 10 is an annular outer boss, 11 is a baffle ring, 12 is a reducer pipe, and 13 is a filler filling device.

In fig. 1-2, the arrows indicate the media flow direction.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, detailed descriptions of embodiments of the present invention are provided below with reference to the accompanying drawings, so that the above objects, features and advantages of the present invention will be more clear. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments

Example 1

As shown in fig. 1 and 2, the rotary compensator of this embodiment includes an inner tube 1, an outer sleeve 6, a reducer 12, and a sealing and pressing flange 5, where the outer sleeve 6 is sleeved on the inner tube 1, one end of the inner tube 1 extends into the outer sleeve 6, the sealing and pressing flange 5 is sleeved on the inner tube 1, and one end of the sealing and pressing flange extends into the outer sleeve 6, and the two are connected through a stud 2, a nut 3, and a gasket 4. The outer sleeve 6 and the reducer pipe 12 are integrally formed. An annular inner boss 8 is arranged on the inner surface of the outer sleeve 6, an annular outer boss 10 is arranged on the outer surface of the inner tube 1, a sealing filler 7 is arranged between the annular inner boss 8 and one end, extending into the outer sleeve 6, of the sealing pressing flange 5, a sliding piece 9 is arranged in a cavity formed between the annular outer boss 10 and the annular inner boss 8, and a baffle ring 11 is arranged at the joint of the outer sleeve 6 and the reducer pipe 12. The inner diameter of the baffle ring 11 is the same as that of the inner pipe 1, so that the inner wall of the limiting baffle ring 11 and the inner wall of the inner pipe are positioned on the same plane to block the scouring of the sealing filler by the medium as much as possible.

In the present embodiment, the sliding member 9 is a sliding ring, but it is of course possible to use a conventional ball as the sliding member.

Example 2

As shown in figure 3, in order to keep good sealing performance, 4-30 injection ports are uniformly distributed on the outer sleeve 6 along the same circumference at the position corresponding to the sealing filler 7, a radial through hole arranged in each injection port is communicated with a transverse hole at the waist part, the outer end of the radial through hole is provided with a plug screw with a hole, and the plug screw arranged in the transverse hole traverses the radial through hole to form a sealing filler filling device 13 of a valve structure. When the rotary compensator is used, if the sealing performance is reduced and leakage occurs, the screw plug arranged at the outer end of the injection opening can be removed on line, then the screw plug in the transverse hole is rotated, the hole on the screw plug is communicated with the radial through hole, and the injection opening is supplemented with sealing filler by using a pressure gun. After the supplement is finished, firstly screwing the screw plug in the transverse hole, then pulling out the pressure gun, and then reinstalling the screw plug at the outer end of the inlet. Therefore, the sealing performance of the rotary compensator can be timely recovered by replenishing the sealing filler on line.

In the embodiment, the sliding member 10 is replaced by an end face seal in the cavity formed between the annular outer boss 10 and the annular inner boss 8, and the end face seal is made of flexible materials such as graphite, so that the sealing performance of the rotary compensator can be further ensured.

The utility model discloses the principle that can effectively keep rotary compensator's sealing performance is:

referring to fig. 1 and 2, when the medium flows in the direction shown in fig. 1, if the baffle ring is not provided, the medium rapidly flows to form vortex and impact on the gap; when the flow direction is shown in fig. 2, the medium can directly impact the gap between the outer sleeve and the inner pipe, so no matter how the medium flows, the medium can impact the gap and flow into the packing chamber, the medium can carry oxygen into the packing chamber while scouring the packing, oxidation and ablation of the packing are accelerated, and thus, the sealing is failed, and the product leaks. And after the baffle ring is added, the baffle ring can directly and effectively prevent the medium from scouring the sealing filler, so that the situation is prevented from occurring.

Claims (5)

1. The utility model provides a rotary compensator, including inner tube (1), outer tube (6), reducing pipe (12), sealed flange (5) compress tightly, outer tube (6) suit is on inner tube (1), the one end of inner tube (1) stretches into in outer tube (6), sealed flange (5) suit is on inner tube (1), its one end stretches into in outer tube (6), be equipped with annular inner boss (8) on the internal surface of outer tube (6), be equipped with outer boss (10) of annular on the external surface of inner tube (1), be equipped with between the one end that outer tube (6) were stretched into in annular inner boss (8) and sealed flange (5) and seal packing (7), be provided with slider (9) or end face seal spare in the cavity that forms between outer boss (10) of annular and annular inner boss (8), its characterized in that: a baffle ring (11) is arranged at the joint of the outer sleeve (6) and the reducer pipe (12).

2. A rotary compensator according to claim 1, characterized in that the inner diameter of the baffle ring (11) is the same as the inner diameter of the inner tube (1).

3. Rotational compensator according to claim 1, characterized in that the outer sleeve (6) and the reducer pipe (12) are of one-piece integral construction.

4. A rotary compensator according to claim 1, characterized in that the outer jacket tube (6) is provided with a sealing packing filling device (13).

5. Rotational compensator according to claim 1, characterized in that the slide (9) is a ball or a sliding ring.

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