CN111609234A - Rotary compensator end face sealing structure and rotary compensator - Google Patents

Rotary compensator end face sealing structure and rotary compensator Download PDF

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Publication number
CN111609234A
CN111609234A CN202010579346.7A CN202010579346A CN111609234A CN 111609234 A CN111609234 A CN 111609234A CN 202010579346 A CN202010579346 A CN 202010579346A CN 111609234 A CN111609234 A CN 111609234A
Authority
CN
China
Prior art keywords
sealing
outer sleeve
rotary compensator
annular
pressing flange
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010579346.7A
Other languages
Chinese (zh)
Inventor
洪亮
洪磊
尹明华
朱爱春
王荣
吴秀华
曹广金
黄志娟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangsu Better Pipe Fitting Co ltd
Original Assignee
Jiangsu Better Pipe Fitting Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiangsu Better Pipe Fitting Co ltd filed Critical Jiangsu Better Pipe Fitting Co ltd
Priority to CN202010579346.7A priority Critical patent/CN111609234A/en
Publication of CN111609234A publication Critical patent/CN111609234A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L27/00—Adjustable joints, Joints allowing movement
    • F16L27/08—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe
    • F16L27/0804—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another
    • F16L27/0808—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another the joint elements extending coaxially for some distance from their point of separation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/168—Sealings between relatively-moving surfaces which permits material to be continuously conveyed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L27/00—Adjustable joints, Joints allowing movement
    • F16L27/08—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe
    • F16L27/0804—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another
    • F16L27/0808—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another the joint elements extending coaxially for some distance from their point of separation
    • F16L27/0812—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another the joint elements extending coaxially for some distance from their point of separation with slide bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L27/00—Adjustable joints, Joints allowing movement
    • F16L27/08—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe
    • F16L27/0804—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another
    • F16L27/0808—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another the joint elements extending coaxially for some distance from their point of separation
    • F16L27/0824—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another the joint elements extending coaxially for some distance from their point of separation with ball or roller bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L51/00—Expansion-compensation arrangements for pipe-lines

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Joints Allowing Movement (AREA)
  • Sealing Devices (AREA)

Abstract

The invention relates to a rotary compensator sealing structure and a rotary compensator. The rotary compensator end face sealing structure comprises an inner pipe (1), a sealing pressing flange (5) and an outer sleeve (6), and is characterized in that the inner wall of the end part of the sealing pressing flange (5) far away from one end of the outer sleeve is provided with an annular groove (16), an annular sealing element (14) is arranged in the groove (16), and the sealing pressing ring (15) is sleeved on the inner pipe (1) and positioned outside the groove of the sealing pressing flange (5) to fix the sealing pressing ring. The invention can effectively delay the thermal weight loss (ablation amount) of the sealing filler graphite at high temperature, reduces the loss of the rotary compensator from the assembly gap between the inner pipe and the sealing pressing flange under the medium flushing due to the long-term use of the sealing material, and obviously improves the sealing effect.

Description

Rotary compensator end face sealing structure and rotary compensator
Technical Field
The invention relates to a rotary compensator and an end face sealing structure thereof.
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 delay the thermal weight loss (ablation amount) of the sealing filler graphite at high temperature and prevent the loss of a sealing material of a rotary compensator from an assembly gap between a sealing pressing flange and an inner pipe under the action of medium flushing due to long-term use of the sealing material, the invention provides a sealing structure for the rotary compensator with better sealing performance and the rotary compensator.
The sealing structure for the rotary compensator comprises an inner pipe, a sealing compression flange and an outer sleeve, wherein an annular groove is formed in the inner wall of the end part of the sealing compression flange, which is far away from one end of the outer sleeve, an annular sealing element is arranged in the annular groove and is fixed by a sealing compression ring which is sleeved on the inner pipe and is positioned on the outer side of the annular groove of the sealing compression flange.
The rotary compensator adopts the end face sealing structure and comprises an inner pipe, an outer sleeve, a reducer pipe and a sealing and pressing flange, wherein the outer sleeve is sleeved on the inner pipe, one end of the inner pipe extends into the outer sleeve, the sealing and pressing flange is sleeved on the inner pipe, one end of the sealing and pressing flange extends into the outer sleeve, an annular inner boss is arranged on the inner surface of the outer sleeve, an annular outer boss is arranged on the outer surface of the inner pipe, a sliding piece is arranged between the annular inner boss and the annular outer boss, sealing filler is arranged between the annular inner boss and one end of the sealing and pressing flange extending into the outer sleeve, an annular groove is formed in the inner wall of the end part of the sealing and pressing flange far away from one end of the outer sleeve, an annular sealing piece is arranged in the annular groove, and a sealing.
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.
In order to prevent the product from dislocating in the opposite direction in the engineering installation process and prevent the sliding piece or the end face sealing piece arranged between the inner ring-shaped boss and the outer ring-shaped boss from displacing, a limiting block is arranged in the reducer pipe.
According to the invention, the annular groove is formed in the inner wall of the end part of the sealing and pressing flange, which is far away from one end of the outer sleeve, and the annular sealing element is arranged in the annular groove, so that the annular sealing element is tightly attached to the inner pipe, and an assembly gap between the inner pipe and the sealing and pressing flange is filled to form a seal, thereby isolating air, effectively preventing the loss of the sealing material from the assembly gap between the outer sleeve and the sealing and pressing flange due to the long-term use of the sealing material of the rotary compensator under the medium flushing, and remarkably improving the sealing effect.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
FIG. 2 is a partial enlarged view of FIG. 1 at F
Fig. 3 is a schematic structural diagram of embodiment 2 of the present invention.
In fig. 1-3, 1 is an inner tube, 2 is a stud, 3 is a nut, 4 is a gasket, 5 is a sealing hold-down flange, 6 is an outer sleeve, 7 is a sealing filler, 8 is an annular inner boss, 9 is a sliding member, 10 is an annular outer boss, 11 is a stopper, 12 is a reducer, 13 is a fastener, 14 is an annular sealing member, 15 is a sealing press ring, 16 is an annular groove, and 17 is a filling device.
Detailed Description
The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments of the present invention when taken in conjunction with the accompanying drawings. The drawings are not intended to be to scale, emphasis instead being placed upon illustrating the principles of the embodiments.
Example 1
As shown in fig. 1-2, in this embodiment, an inner tube 1 of the rotary compensator, an outer sleeve 6, a reducer 12, and a sealing and pressing flange 5 are provided, wherein 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. 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 pipe 1, a sliding piece 9 is arranged between the annular inner boss 8 and the annular outer boss 10, and 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 3. An annular groove 16 is formed in the inner wall of the end portion, away from one end of the outer sleeve, of the sealing and pressing flange 6, an annular sealing piece 14 is arranged in the annular groove 16, and the annular sealing piece 14 is pressed and fixed through a fastening piece 13 by a sealing pressing ring 15 which is sleeved on the inner pipe 1 and located on the outer side of the annular groove 16 of the sealing and pressing flange 5. The annular sealing element 14 is tightly attached to the inner tube 1, and fills the assembly gap between the inner tube 1 and the sealing and pressing flange 5 to form a seal.
In the present embodiment, the sliding member 9 is a sliding ring, but a conventional ball may be used as the sliding member.
Example 2
As shown in fig. 3, the basic structure of the present embodiment is the same as that of embodiment 1, except that:
in order to keep good sealing performance, 4-30 injection ports are uniformly distributed on the outer sleeve 7 along the same circumference at the position corresponding to the sealing filler 9, a radial through hole arranged in each injection port is communicated with a transverse hole at the waist part, the outer end of each radial through hole is provided with a screw plug with a hole, and the screw plug arranged in the transverse hole traverses the radial through hole to form a sealing filler filling device 17 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 9 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.

Claims (7)

1. The sealing structure of the rotary compensator comprises an inner pipe (1), a sealing pressing flange (5) and an outer sleeve (6), and is characterized in that the inner wall of the end part of the sealing pressing flange (5) far away from one end of the outer sleeve is provided with an annular groove (16), an annular sealing element (14) is arranged in the annular groove (16), and the sealing pressing ring (15) is sleeved on the inner pipe (1) and positioned outside the annular groove (16) of the sealing pressing flange (5) for fixing.
2. A seal structure for a rotary compensator according to claim 1, wherein the seal pressing ring (15) is connected to the seal pressing flange (5) by a fastening member (13).
3. A rotary compensator comprises an inner tube (1), an outer sleeve (6), a reducer pipe (12) and a sealing and pressing flange (5), wherein 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), one end of the sealing and pressing flange extends into the outer sleeve (6), 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 sliding piece (9) or an end face sealing piece is arranged between the annular inner boss (8) and the annular outer boss (10), a sealing filler (7) is arranged between the annular inner boss (8) and one end of the sealing and pressing flange (3) extending into the outer sleeve (6), and the rotary compensator is characterized in that an annular groove (16) is formed on the inner wall of the end part of the, an annular sealing element (14) is arranged in the annular groove (16) and is fixed by a sealing press ring (15) which is sleeved on the inner pipe (1) and is positioned on the outer side of the annular groove (16) of the sealing and pressing flange (5).
4. A rotary compensator according to claim 3, characterized by the sealing collar (15) being connected to the sealing hold-down flange (5) by fasteners (13).
5. A rotary compensator according to claim 3, characterized in that the outer sleeve (6) and the reducer (12) are of one-piece integral construction.
6. A rotary compensator according to claim 3, characterized in that the outer sleeve (6) is provided with a sealing packing filling device (17).
7. A rotary compensator according to claim 3, characterized by a stop block (11) arranged in the reducer pipe (12).
CN202010579346.7A 2020-06-23 2020-06-23 Rotary compensator end face sealing structure and rotary compensator Pending CN111609234A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010579346.7A CN111609234A (en) 2020-06-23 2020-06-23 Rotary compensator end face sealing structure and rotary compensator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010579346.7A CN111609234A (en) 2020-06-23 2020-06-23 Rotary compensator end face sealing structure and rotary compensator

Publications (1)

Publication Number Publication Date
CN111609234A true CN111609234A (en) 2020-09-01

Family

ID=72194245

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010579346.7A Pending CN111609234A (en) 2020-06-23 2020-06-23 Rotary compensator end face sealing structure and rotary compensator

Country Status (1)

Country Link
CN (1) CN111609234A (en)

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