CN214699662U - Double-sealed-cavity rotary compensator - Google Patents
Double-sealed-cavity rotary compensator Download PDFInfo
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- CN214699662U CN214699662U CN202120294601.3U CN202120294601U CN214699662U CN 214699662 U CN214699662 U CN 214699662U CN 202120294601 U CN202120294601 U CN 202120294601U CN 214699662 U CN214699662 U CN 214699662U
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- 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
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- Sealing Devices (AREA)
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Abstract
A double-sealed-cavity rotary compensator comprises an inner pipe, a connecting pipe, an outer sleeve sleeved on the inner pipe and a filler flange, wherein one end of the filler flange extends into the outer sleeve, the filler flange is connected with the outer sleeve through a fastener, an annular outer boss is arranged on the outer surface of the inner pipe, a first annular inner boss and a second annular inner boss are arranged on the inner surface of the outer sleeve, a first sealed cavity is formed between the first annular inner boss and the second annular inner boss, and sealing filler is arranged in the first sealed cavity; and a second sealing cavity is formed between the second annular inner boss and one end of the packing flange extending into the outer sleeve, a composite sealing structure is arranged in the second sealing cavity, the composite sealing structure comprises N sealing rings and N-1 sealing rings, N is a natural number more than or equal to 2, and the sealing rings are arranged alternately. The utility model discloses an increase composite seal structure, form the double containment chamber, can effectively improve rotary compensator's sealing performance, prolong its life.
Description
Technical Field
The utility model relates to a rotary compensator for the pipeline specifically is a double-seal chamber rotary compensator.
Background
The existing compensation devices generally include a rotary compensator, a corrugated compensator, a rotary compensator, a spherical compensator, and the like, and are used for compensating axial or radial displacement of the pipeline caused by expansion with heat and contraction with cold. Because the medium that the pipeline was carried generally all has certain temperature and pressure, consequently have higher requirement to the sealing performance of compensator, especially when carrying high temperature, high-pressure medium, the requirement for compensator is higher: not only must there be sufficient displacement compensation, but it must also have good sealing properties and a long service life.
In the existing rotary compensator, a sealing element is arranged between an annular inner boss on the inner surface of an outer sleeve and one end of a filler flange extending into the outer sleeve, and the sealing element is usually made of flexible graphite filler. The flexible graphite seal has the characteristics of high temperature resistance, good lubricity, small friction coefficient, no hardening, no volatilization, no flowing, no toxicity, no pollution, aging resistance and the like, but the flexible graphite is easy to oxidize, burn out and wear, and the leakage probability of the compensator can be increased after long-term use.
Disclosure of Invention
The to-be-solved technical problem of the utility model is exactly that current rotary compensator for pipeline's sealing member is because of adopting flexible graphite to pack, can increase the problem that rotary compensator leaked the probability because of oxidation, loss of ignition and wearing and tearing after long-time the use to further provide rotary compensator's sealing performance.
The double-sealed-cavity rotary compensator comprises an inner pipe, a connecting pipe, an outer sleeve sleeved on the inner pipe and a filler flange, wherein one end of the filler flange extends into the outer sleeve, the filler flange is connected with the outer sleeve through a fastener, and an annular outer boss is arranged on the outer surface of the inner pipe; a first annular inner boss and a second annular inner boss are arranged on the inner surface of the outer sleeve, a first sealing cavity is formed between the first annular inner boss and the second annular inner boss, and sealing filler is arranged in the first sealing cavity; and a second sealing cavity is formed between the second annular inner boss and one end of the packing flange extending into the outer sleeve, a composite sealing structure is arranged in the second sealing cavity, the composite sealing structure comprises N sealing rings and N minus one sealing ring, N is a natural number more than or equal to 2, and the sealing rings are arranged alternately.
In the composite sealing structure, except the sealing ring adjacent to the second annular inner boss, two side surfaces of the other sealing rings are recessed inwards to form a cavity with a V-shaped section, and the section of one end, extending into the outer sleeve, of the packing flange is triangular and matched with the V-shaped cavity; a rhombic cavity is formed between every two adjacent sealing rings, the cross section of each corresponding sealing ring is rhombic, and two ends of each corresponding sealing ring respectively extend into the V-shaped cavities of the adjacent sealing rings; one end of the sealing ring adjacent to the second annular inner boss is concave inwards to form a V-shaped cavity, and the shape of the cavity formed by concave inwards at the other end is matched with the shape of the section of the adjacent end of the second annular inner boss.
The seal ring is made of an elastic material, such as rubber.
In order to avoid the phenomenon that a sealing ring in the composite sealing structure generates a gap due to normal abrasion after being used for a long time, so that the sealing performance of the rotary compensator is influenced, the outer side of the packing flange is also provided with a spring flange, springs which are axially arranged are uniformly distributed between the spring flange and the packing flange along the same circumference, and the spring flange, the packing flange and the outer sleeve are connected through the same fastening piece. When the sealing ring generates a gap due to normal abrasion after long-term use, the packing flange can further extend into the outer sleeve under the action of the spring, so that the gap generated due to normal abrasion after long-term use of the sealing ring in the composite sealing structure is eliminated.
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 filler filling device, so that the online filling of the sealing filler is realized.
In order to facilitate relative rotation between the inner tube and the outer sleeve, a sliding part is arranged in a cavity formed between the first annular inner boss and the annular outer boss, and the sliding part is a sliding ring or a ball.
The utility model discloses through increasing composite seal structure on prior art's basis, form the double containment chamber. The two side faces of the sealing ring of the composite sealing structure are both concave inwards to form a cavity with a tapered section, the cavity is matched with the taper on the two sides of the rhombic sealing ring, and the sealing ring can be attached to and sealed with the outer wall of the inner pipe and the inner wall of the outer sleeve pipe under the jacking of the rhombic sealing ring by only relatively small force after assembly, so that a good sealing effect is achieved. The utility model discloses can effectively improve rotary compensator's sealing performance, prolong its life.
Drawings
FIG. 1 is a schematic structural diagram of embodiment 1 of the present invention
Fig. 2 is an enlarged sectional view of a portion a of fig. 1.
Fig. 3 is a schematic structural diagram of embodiment 2 of the present invention.
Fig. 4 is a schematic structural diagram of embodiment 3 of the present invention.
In fig. 1-4, 1 is an inner tube, 2 is a fastener, 3 is a packing flange, 4 is an outer sleeve, 5 is a sealing ring, 6 is a sealing ring, 7 is a packing filling device, 8 is a sealing packing, 9 is a sliding member, 10 is a connecting tube, 11 is a first annular inner boss, 12 is an outer boss, 13 is a spring flange, 14 is a spring, 15 is a second annular inner boss, 16 is a limit block
Detailed Description
Example 1
As shown in fig. 1, the double-sealed-cavity rotary compensator of this embodiment is composed of an inner tube 1, a connecting tube 10, an outer sleeve 4 and a filler flange 3, the outer sleeve 4 and the connecting tube 10 are integrated, and a limiting block 16 is arranged in the connecting tube. One end of the packing flange 3 extends into the outer sleeve 4, and the packing flange 3 is connected with the outer sleeve 4 through the fastener 2. The inner surface of the outer sleeve 4 is provided with a first annular inner boss 11 and a second annular inner boss 15, the outer surface of the inner tube 1 is provided with an annular outer boss 12, and a sliding part 9 is arranged in a cavity between the first annular inner boss 11 and the annular outer boss 12, so that the inner tube 1 can rotate relative to the outer sleeve 4 conveniently. In the present embodiment, the sliding member is a sliding ring, and a ball in the prior art may be used.
A first sealing cavity is formed between the first annular inner boss 11 and the second annular inner boss 15, sealing filler 8 is arranged in the first sealing cavity, a second sealing cavity is formed between the second annular inner boss 15 and one end, extending into the outer sleeve 4, of the filler flange 3, a composite sealing structure is arranged in the first sealing cavity, the composite sealing structure comprises N sealing rings 6 and N-1 sealing rings 5, N is a natural number which is more than or equal to 2, the sealing rings 6 and the sealing rings 5 are arranged alternately, namely one sealing ring is arranged between every two adjacent sealing rings. The embodiment is three sealing rings and two sealing rings.
In the embodiment, flexible graphite is adopted as the sealing filler; the sealing ring is made of fluororubber; the sealing ring can also be made of elastic materials, is made of stainless steel materials, and can also be made of other metal materials.
As shown in fig. 2, in the above-mentioned composite sealing structure, except the sealing ring 6 adjacent to the second annular inner boss 15, both side surfaces of the other sealing rings 6 are recessed inwards to form a cavity with a V-shaped cross section, and the cross section of one end of the packing flange 3 extending into the outer sleeve 4 is triangular and is matched with the V-shaped cavity; a rhombic cavity is formed between every two adjacent sealing rings 6, the cross section of each corresponding sealing ring 5 is rhombic, and two ends of each corresponding sealing ring respectively extend into the V-shaped cavities of the adjacent sealing rings 6; one end of the sealing ring 6 adjacent to the second annular inner boss 15 is concave inwards to form a V-shaped cavity, and the shape of the cavity formed by concave inwards at the other end is matched with the cross-sectional shape of the adjacent end of the second annular inner boss 15.
The sealing principle of the composite sealing structure is as follows:
because the sealing ring is made of elastic material, and the two side surfaces of the sealing ring are both concave inwards to form a cavity with a tapered section, the cavity is matched with the taper at the two sides of the rhombic sealing ring, and the sealing ring can be pressed against the rhombic sealing ring and can be attached to and sealed with the outer wall of the inner pipe and the inner wall of the outer sleeve pipe by relatively small force after assembly.
When the rotary compensator works, because the two sides of the sealing ring of the composite sealing structure are of the taper structures, when a product is assembled, under the action of a fastener, pressing force can be applied to the composite sealing structure through the packing flange, the diamond-shaped sealing ring directly extrudes the sealing ring towards the two sides, and the sealing ring, the inner pipe and the outer sleeve can be tightly sealed and attached to realize sealing effect under the condition of small force.
Example 2
As shown in fig. 3, in this embodiment, a filler filling device 7 is provided on the outer sleeve 4 based on embodiment 1 in order to avoid that the sealing filler in the first sealing cavity generates a gap due to normal wear in long-term use, thereby affecting the sealing performance of the entire rotary compensator. Specifically, 2-30 filling ports are uniformly distributed on the outer sleeve 4 along the same circumference at the position corresponding to the sealing filler, a radial through hole arranged in each filling port is communicated with a transverse hole at the waist part, a screw plug is arranged at the outer end of each radial through hole, and the screw plug arranged in each transverse hole transversely penetrates through the radial through hole to form a sealing filler filling device 7 of a valve structure. When the rotary compensator is used, when the sealing filler in the first sealing cavity generates a gap due to normal abrasion in long-term use, so that the sealing performance of the rotary compensator is reduced, the screw plug arranged at the outer end of the injection port and the screw plug in the transverse hole can be detached on line, and the pressure gun is used for supplementing the sealing filler to the injection port. 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 filler is supplemented on line, the volume of the sealing filler in the sealing cavity is increased, and the sealing performance of the rotary compensator is recovered in time.
The above filler filling device is prior art.
In the embodiment, flexible graphite is adopted as the sealing filler; the sealing ring is made of fluororubber material and can also be made of other elastic materials; the sealing ring is made of stainless steel, and other metal materials can be adopted.
Example 3
As shown in fig. 4, in order to avoid the sealing ring in the composite sealing structure from generating a gap due to normal wear after being used for a long time, thereby affecting the sealing performance of the rotary compensator, in this embodiment, a spring flange 13 is arranged on the outer side of the packing flange 3 based on embodiment 1, springs 14 axially arranged are uniformly distributed between the spring flange 13 and the packing flange 3 along the same circumference, and the spring flange 13, the packing flange 3 and the outer sleeve 4 are connected by the same fastener. The spring 14 is in a compression state under a normal working state, when the sealing ring 6 generates a gap due to normal abrasion after long-term use, the packing flange 3 can further extend into the outer sleeve 4 under the action of the elastic force of the spring 14, so that the gap generated due to normal abrasion after long-term use of the sealing ring 6 in the composite sealing structure is eliminated, the rhombic sealing ring keeps extrusion on the sealing ring, and the sealing ring is continuously and tightly attached to the inner pipe and the outer sleeve.
In the embodiment, flexible graphite is adopted as the sealing filler; the sealing ring is made of fluororubber and can also be made of other high-temperature resistant elastic materials; the sealing ring is made of stainless steel, and other metal materials can be adopted.
Claims (8)
1. A double-sealed-cavity rotary compensator comprises an inner pipe, a connecting pipe, an outer sleeve sleeved on the inner pipe and a packing flange, wherein one end of the packing flange extends into the outer sleeve, the packing flange is connected with the outer sleeve through a fastener, and an annular outer boss is arranged on the outer surface of the inner pipe; and a second sealing cavity is formed between the second annular inner boss and one end of the packing flange extending into the outer sleeve, a composite sealing structure is arranged in the second sealing cavity, the composite sealing structure comprises N sealing rings and N-1 sealing rings, N is a natural number more than or equal to 2, and the sealing rings are arranged alternately.
2. The dual-sealed-chamber rotary compensator of claim 1, wherein both side faces of the remaining seal rings except the seal ring adjacent to the second annular inner boss are recessed inward to form a cavity with a V-shaped cross section, and the cross section of one end of the packing flange extending into the outer sleeve is triangular, which is matched with the V-shaped cavity; a rhombic cavity is formed between every two adjacent sealing rings, the cross section of each corresponding sealing ring is rhombic, and two ends of each corresponding sealing ring respectively extend into the V-shaped cavities of the adjacent sealing rings; one end of the sealing ring adjacent to the second annular inner boss is concave inwards to form a V-shaped cavity, and the shape of the cavity formed by concave inwards at the other end is matched with the shape of the section of the adjacent end of the second annular inner boss.
3. The dual chamber rotary compensator of claim 1 or 2, wherein the seal ring is made of an elastomeric material.
4. The dual chamber rotary compensator of claim 3, wherein the seal ring is made of rubber.
5. The dual-sealed-chamber rotary compensator of claim 1 or 2, wherein the outside of the packing flange is further provided with a spring flange, axially arranged springs are uniformly distributed along the same circumference between the spring flange and the packing flange, and the spring flange, the packing flange and the outer sleeve are connected by the same fastener.
6. The dual sealed chamber rotary compensator of claim 1 or 2, wherein the outer sleeve is provided with a sealing packing filling means.
7. The dual chamber rotary compensator of claim 1 or 2, wherein a sliding member is provided between the first annular inner boss and the annular outer boss.
8. The dual chamber rotary compensator of claim 7, wherein the slide is a sliding ring or a ball.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2020230868391 | 2020-12-21 | ||
| CN202023086839 | 2020-12-21 |
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| Publication Number | Publication Date |
|---|---|
| CN214699662U true CN214699662U (en) | 2021-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120294601.3U Active CN214699662U (en) | 2020-12-21 | 2021-02-02 | Double-sealed-cavity rotary compensator |
| CN202110143543.9A Pending CN112963640A (en) | 2020-12-21 | 2021-02-02 | Double-sealed-cavity rotary compensator |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110143543.9A Pending CN112963640A (en) | 2020-12-21 | 2021-02-02 | Double-sealed-cavity rotary compensator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112963640A (en) * | 2020-12-21 | 2021-06-15 | 江苏贝特管件有限公司 | Double-sealed-cavity rotary compensator |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE749367C (en) * | 1939-02-15 | 1944-12-04 | Pipe expansion compensator designed as a stuffing box | |
| CN101012904A (en) * | 2007-02-03 | 2007-08-08 | 王向前 | Rotary compensator with compound bearing structure |
| CN101832438A (en) * | 2010-06-01 | 2010-09-15 | 陈墅庚 | Novel maintenance-free rotary compensator |
| CN102003592B (en) * | 2010-09-19 | 2013-06-26 | 陈墅庚 | Novel double-gland high-pressure pipeline displacement compensator |
| CN102996962A (en) * | 2011-09-08 | 2013-03-27 | 江苏宝金来管道成套设备有限公司 | High-pressure-resistant rotating compensator |
| CN103047506B (en) * | 2012-12-26 | 2015-10-28 | 江苏贝特管件有限公司 | Seal cage is set to the pipeline compensator on inclined-plane |
| CN203718251U (en) * | 2014-03-08 | 2014-07-16 | 江苏恒丰波纹管有限公司 | Maintenance-free rotating compensator with guiding ring |
| CN105526442A (en) * | 2016-01-13 | 2016-04-27 | 江苏晨光波纹管有限公司 | High-pressure-resistant self-sealing rotary compensator |
| CN111594678A (en) * | 2020-06-16 | 2020-08-28 | 江苏贝特管件有限公司 | End face sealing structure for rotary compensator and rotary compensator |
| CN214699662U (en) * | 2020-12-21 | 2021-11-12 | 江苏贝特管件有限公司 | Double-sealed-cavity rotary compensator |
-
2021
- 2021-02-02 CN CN202120294601.3U patent/CN214699662U/en active Active
- 2021-02-02 CN CN202110143543.9A patent/CN112963640A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112963640A (en) * | 2020-12-21 | 2021-06-15 | 江苏贝特管件有限公司 | Double-sealed-cavity rotary compensator |
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| CN112963640A (en) | 2021-06-15 |
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