CN109027508B - Mechanical seal protection device with inclined large connecting pipe on outer wall - Google Patents
Mechanical seal protection device with inclined large connecting pipe on outer wall Download PDFInfo
- Publication number
- CN109027508B CN109027508B CN201811149136.3A CN201811149136A CN109027508B CN 109027508 B CN109027508 B CN 109027508B CN 201811149136 A CN201811149136 A CN 201811149136A CN 109027508 B CN109027508 B CN 109027508B
- Authority
- CN
- China
- Prior art keywords
- ring
- fixedly connected
- sealing
- connecting pipe
- end cover
- 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.)
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Links
- 238000007789 sealing Methods 0.000 claims abstract description 54
- 230000006835 compression Effects 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 239000002274 desiccant Substances 0.000 claims description 4
- 230000001012 protector Effects 0.000 claims 3
- 230000000694 effects Effects 0.000 abstract description 11
- 238000009434 installation Methods 0.000 abstract description 10
- 238000003466 welding Methods 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/10—Means for stopping flow from or in pipes or hoses
- F16L55/115—Caps
- F16L55/1152—Caps fixed by screwing or by means of a screw-threaded ring
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
Abstract
The invention discloses a mechanical seal protection device with an inclined large connecting pipe on the outer wall, which comprises a barrel, an upper supporting ring and a lower supporting ring which are fixedly connected with two ends of the barrel, wherein two ends of more than three supporting pipes are fixedly connected with the upper supporting ring and the lower supporting ring respectively, the supporting pipes are fixedly connected with an upper connecting plate and a lower connecting plate, a seal end cover is arranged on the lower side of the lower supporting ring, more than three studs slide through the seal end cover, the respective upper connecting plate and lower connecting plate, springs, gaskets and fixed clamping blocks are sleeved on the studs in sequence, and rubber gaskets are connected with all the fixed clamping blocks; the outer side of the sealing end cover is fixedly connected with a protection cylinder body, and the outer side face of the convex ring of the sealing end cover is provided with a sealing ring; the invention has the advantages of light weight, easy carrying, easy operation and good sealing effect, can prevent collision damage and prevent the connecting pipe from being polluted, has strong universality and can realize installation and disassembly without a special auxiliary device.
Description
Technical Field
The invention relates to a mechanical seal protection device for a connecting pipe, in particular to a mechanical seal protection device for a large inclined connecting pipe on the outer wall of nuclear safety equipment in a nuclear power station.
Background
At present, main nuclear safety equipment in a nuclear power station such as a steam generator, a voltage stabilizer, an injection tank and the like is generally required to be filled with nitrogen or other inert gases for protection and maintain certain low pressure (usually 0.01 MPa) until the equipment is installed in the transportation and on-site storage processes after the manufacturing is completed so as to avoid the pollution of the equipment by chlorides, halogens or carbon steel and the like. This requires plugging all of the connection tubes on the device to maintain the required pressure. The connecting pipe of the container equipment is subjected to low-pressure sealing at present, and three modes are mainly adopted: and welding end plates, plugs and mechanical seals.
The sealing is carried out by adopting a welding mode, so that the effect is the best and the sealing effect is easy to ensure. But the welding sealing piece of the connecting pipe is required to be cut and dismantled on site, and the groove of the connecting pipe is processed until the requirement of on-site butt welding is met. The form of the pipe connecting groove of the nuclear safety equipment is complex in structure, mechanics, field installation and the like, the processing requirements are high, the on-site machining equipment, the environmental conditions and the worker technology are difficult to meet the requirements, and meanwhile, a customer generally also requires that the pipe connecting groove is required to be processed to meet the on-site welding state, so that the pipe connecting groove is not sealed in a welding mode, and the butt joint pipe is sealed and protected in a mechanical sealing mode.
The mechanical sealing mode adopted by the connecting pipe 27 commonly used at present is that, as shown in fig. 1, an integral steel plate is adopted as a fixing block for inner sealing at the arc section of the inner side of the connecting pipe connected with the container body, so as to fix and support the sealing device, and the port of the connecting pipe adopts a circular sealing ring and is pressed by a flat cover without a groove to realize the mechanical sealing of the port. Such a seal has the following disadvantages: 1) The arc section of the inner wall of the connecting pipe adopts a whole fixed block, so that the mass is increased, and the fixed block is not suitable for manual transportation; 2) Because the fixed block is a whole steel plate, the fixed block is not easy to design into the necessary operations such as installation through the inner hole of the connecting pipe and removal through the inner hole when the fixed block is detached, an operator is required to drill into the container to carry the fixed block to the arc-shaped position, which is connected with the container body, on the inner side of the connecting pipe for installation, and the operator is required to reach the position when the fixed block is detached, so that time and labor are wasted, and the operation risk of the operator is increased; 3) The port of the connecting pipe is sealed by adopting a flat cover and a flat gasket without grooves, and leakage often occurs due to the small blunt edge of the groove; 4) The inside fixed block directly contacts with the takeover, has increased the risk that the takeover was damaged.
In order to solve the problems, the invention provides a novel mechanical sealing and protecting structure with an inclined outer wall and without large connecting pipes in horizontal and vertical sections and an operation method. The method is characterized in that: 1) The fixed clamping block on the inner side of the connecting pipe does not adopt a whole steel plate, but adopts a plurality of fixed clamping blocks with threads and rotates the fixed clamping blocks through rotating the stud by screwing with the stud, so that the mechanical sealing structure is light in weight, easy to carry and easy to operate, and workers do not need to drill into the container to operate.
2) The spherical rubber pad is arranged below the fixed clamping block on the inner side of the connecting pipe and is arranged on the arc section connected with the container body on the inner side of the connecting pipe, so that collision damage of the arc section can be prevented, and pollution to the connecting pipe can be avoided. 3) The port at the outer side of the connecting pipe is sealed by adopting an O-shaped sealing ring, and meanwhile, the O-shaped sealing ring is arranged at the inner side of the port of the connecting pipe, and double sealing is adopted, so that the sealing effect is enhanced; 4) The adapter tube has strong universality and can be installed and detached without a special auxiliary device.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a mechanical seal protection device with an inclined large connecting pipe on the outer wall, which has the advantages of light weight, easiness in carrying and operation and good sealing effect, can prevent collision damage and prevent the connecting pipe from being polluted, has strong universality, and can realize installation and disassembly without a special auxiliary device.
In order to achieve the aim, the mechanical seal protection device with the inclined large connecting pipe on the outer wall comprises a barrel body, and is characterized in that an upper supporting ring and a lower supporting ring are fixedly connected to two ends of the barrel body, the upper supporting ring is fixedly connected with an upper cover plate, two ends of more than three supporting pipes are fixedly connected with the upper supporting ring and the lower supporting ring respectively, the supporting pipes are fixedly connected with an upper connecting plate and a lower connecting plate, a sealing end cover is arranged on the lower side of the lower supporting ring, more than three studs slide through the sealing end cover, the respective upper connecting plate and the lower connecting plate, positioning pins penetrating through the respective studs are arranged above the upper connecting plate, springs and gaskets are sleeved on the studs below the upper connecting plate in sequence, fixed clamping blocks are connected to the studs below the gaskets through threads, an annular rubber gasket is connected with all the fixed clamping blocks, and the lower connecting plate is positioned below the fixed clamping blocks; compression nuts are arranged on the studs below the sealing end cover; the outer side of the sealing end cover is fixedly connected with a protection cylinder, a convex ring is fixedly arranged on the upper end face of the sealing end cover between the protection cylinder and the double-end stud, and a sealing ring is arranged on the outer side face of the convex ring through a ring groove;
when the large connecting pipe is used, the fixing clamping block and the compression nut are rotated, so that the rubber gasket is tightly attached to the end face of one side of the large connecting pipe, the spring can provide enough pretightening force, meanwhile, the convex ring is arranged in the inner circle of the other side of the large connecting pipe, the sealing ring is tightly attached to the side wall of the inner circle, and the protection cylinder body is added, so that the two ends of the large connecting pipe can be sealed, the sealing effect is good, the whole device is light in weight and easy to carry, a worker does not need to drill into the container, the installation and the disassembly can be realized easily, a special auxiliary device is not needed, and the universality is strong; the rubber gasket can prevent collision damage, no other parts are in direct contact with the connecting pipe, and the connecting pipe can be prevented from being polluted;
as a further improvement of the invention, a plurality of through holes are arranged on the side wall of the cylinder body and the upper cover plate, and a drying agent is arranged in the cylinder body; the protection effect on the inner wall of the large connecting pipe can be improved;
as a further improvement of the invention, the upper support ring is fixedly connected with the upper cover plate through a plurality of connecting bolts and nuts; the installation and the disassembly are convenient;
as a further improvement of the invention, the upper connecting plate and the lower connecting plate corresponding to each supporting tube are also connected through a fixing rod; the rotation of the fixed clamping block can be limited, so that the installation is convenient, and the efficiency is improved;
as a further improvement of the invention, positioning pins penetrating through the respective studs are arranged below the compression nuts; the slipping of the compression nut can be prevented;
as a further improvement of the invention, a sealing ring is arranged on the upper end face of the sealing end cover between the convex ring and the protection cylinder body through a ring groove; the sealing effect can be further improved;
in conclusion, the invention has the advantages of light weight, easy carrying, easy operation and good sealing effect, can prevent collision damage and prevent the connecting pipe from being polluted, has strong universality and can realize installation and disassembly without a special auxiliary device.
Drawings
Fig. 1 is a front view of a conventional large adapter.
Fig. 2 is a front view of an embodiment of the present invention.
Fig. 3 is a cross-sectional view of B-B of fig. 2.
Fig. 4 is a partial view of fig. 2 from D.
Fig. 5 is a C-C cross-sectional view of fig. 4.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 2 to 5, the mechanical seal protection device with the outer wall being an inclined large connecting pipe in the embodiment comprises a cylinder 1, wherein an upper support ring 2 and a lower support ring 3 are fixedly connected at two ends of the cylinder 1 in a welding way, the upper support ring 2 and an upper cover plate 4 are fixedly connected through a plurality of connecting bolts 5 and nuts 6, a plurality of through holes 23 are respectively arranged on the side wall of the cylinder 1 and the upper cover plate 4, and a drying agent (not shown) is arranged in the cylinder 1; the two ends of four support pipes 7 uniformly distributed on the circumference are respectively and fixedly connected with an upper support ring 2 and a lower support ring 3 in a welding way, the support pipes 7 are fixedly connected with an upper connection plate 8 and a lower connection plate 9 in a welding way, the upper connection plate 8 and the lower connection plate 9 corresponding to each support pipe 7 are also connected through a fixing rod 24, a sealing end cover 10 is arranged at the lower side of the lower support ring 3, four studs 11 uniformly distributed on the circumference slide through the sealing end cover 10, the respective upper connection plate 8 and the lower connection plate 9, opening positioning pins 12 penetrating through the respective studs 11 are arranged above the upper connection plate 8, springs 13 and gaskets 14 are sleeved on the studs 11 below the upper connection plate 8 in sequence, fixing clamping blocks 15 are connected on the studs 11 below the gaskets 14 through threads, an annular rubber gasket 16 is connected with all the fixing clamping blocks 15 through screws 17, and the lower connection plate 9 is positioned below the fixing clamping blocks 15; the compression nuts 18 are arranged on the studs 11 below the sealing end cover 10, the compression nuts 18 and the ends of the studs 11 adopt sealing threads, and opening positioning pins 26 penetrating through the respective studs 11 are arranged below the compression nuts 18; the outer side of the sealing end cover 10 is fixedly connected with a protection cylinder body 19, a convex ring 20 is fixedly arranged on the upper end face of the sealing end cover 10 between the protection cylinder body 19 and the double-end stud 11, and sealing rings 21 or 22 are arranged on the outer side face of the convex ring 20 and the upper end face of the sealing end cover 19 between the convex ring 20 and the protection cylinder body 19 through annular grooves;
the shape of the rubber gasket 16 is matched with the shape of the upper end of the connecting pipe 27; when the sealing device is used, the fixing clamping blocks 15 are rotated inwards firstly, so that the fixing clamping blocks 15, the upper cover plate 4, the cylinder body 1 and the supporting tube 7 penetrate through the inner holes of the connecting tubes 27, then the fixing clamping blocks 15 are rotated outwards, the compression nuts 18 are screwed tightly, the rubber gaskets 16 are tightly attached to the upper end faces of the connecting tubes 27, the springs 13 can provide enough pre-tightening force, meanwhile, the convex rings 20 are arranged in the inner circles on the other sides of the connecting tubes 27, the lower ends of the connecting tubes 27 are contacted with the sealing end covers 10, the sealing rings 21 or 22 are tightly attached to the side walls or the end faces of the inner circles of the connecting tubes, and the protection cylinder body 19 is added, so that sealing can be realized on the two ends of the connecting tubes 27, and the sealing effect is good; the device has no whole steel plate for fixing the upper end of the connecting pipe, and adopts a plurality of fixing clamping blocks 15 with threads, so that the whole device has light weight, is easy to carry, does not need workers to drill into the container, is easy to operate, can realize installation and disassembly without special auxiliary devices, and has strong universality; the rubber gasket 16 can prevent collision damage, no other parts are in direct contact with the connecting pipe, and the connecting pipe can be prevented from being polluted; the drying agent can reduce the humidity and improve the protection effect of the inner wall of the butt joint pipe; the fixing rod 24 can limit the rotation of the fixing clamping block 15, so that the fixing clamping block is convenient to install and the efficiency is improved.
Claims (6)
1. The mechanical seal protection device is characterized in that an upper support ring and a lower support ring are fixedly connected to two ends of the cylinder, the upper support ring is fixedly connected with an upper cover plate, two ends of more than three support pipes are fixedly connected with the upper support ring and the lower support ring respectively, the support pipes are fixedly connected with an upper connecting plate and a lower connecting plate, a sealing end cover is arranged on the lower side of the lower support ring, more than three studs slide through the sealing end cover, the respective upper connecting plate and the lower connecting plate, positioning pins penetrating through the respective studs are arranged above the upper connecting plate, springs and gaskets are sleeved on the studs below the upper connecting plate in sequence, fixed clamping blocks are connected on the studs below the gaskets through threads, an annular rubber gasket is connected with all the fixed clamping blocks, and the lower connecting plates are positioned below the fixed clamping blocks; compression nuts are arranged on the studs below the sealing end cover; the outer side of the sealing end cover is fixedly connected with a protection cylinder body, a convex ring is fixedly arranged on the upper end face of the sealing end cover between the protection cylinder body and the double-end stud, and a sealing ring is arranged on the outer side face of the convex ring through a ring groove.
2. The mechanical seal protector for large inclined connecting pipe as claimed in claim 1, wherein the side wall and the upper cover plate are provided with a plurality of through holes, and the drying agent is arranged in the cylinder.
3. The mechanical seal protection device with the inclined large connecting pipe as claimed in claim 1, wherein the upper supporting ring and the upper cover plate are fixedly connected through a plurality of connecting bolts and nuts.
4. A mechanical seal protector with an inclined large connecting tube as claimed in any one of claims 1 to 3, wherein the upper and lower connecting plates corresponding to each support tube are also connected by a fixing rod.
5. The mechanical seal protector for large inclined connecting pipe as claimed in claim 4, wherein positioning pins passing through the respective studs are arranged below the compression nuts.
6. The mechanical seal protection device with the inclined large connecting pipe as claimed in claim 5, wherein a sealing ring is arranged on the upper end face of the sealing end cover between the convex ring and the protection cylinder body through a ring groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811149136.3A CN109027508B (en) | 2018-09-29 | 2018-09-29 | Mechanical seal protection device with inclined large connecting pipe on outer wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811149136.3A CN109027508B (en) | 2018-09-29 | 2018-09-29 | Mechanical seal protection device with inclined large connecting pipe on outer wall |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109027508A CN109027508A (en) | 2018-12-18 |
| CN109027508B true CN109027508B (en) | 2023-12-08 |
Family
ID=64615078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811149136.3A Active CN109027508B (en) | 2018-09-29 | 2018-09-29 | Mechanical seal protection device with inclined large connecting pipe on outer wall |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109027508B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110787984B (en) * | 2019-12-04 | 2023-09-22 | 航天精工股份有限公司 | Fastener with ultrasonic transducer, manufacturing process and use |
| CN113803557B (en) * | 2021-07-29 | 2023-11-03 | 东方电气集团东方锅炉股份有限公司 | Nitrogen filling sealing device of U-shaped call pipe and use method |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1046111A (en) * | 1989-04-04 | 1990-10-17 | 法玛通公司 | The method and apparatus of extraction of closure plug from steam generator tube |
| AR248306A1 (en) * | 1992-09-04 | 1995-07-12 | Unger Jorge Alberto Tagtachian | Internal seal for coupling tubes in hydraulic tube tests. |
| CA2305957A1 (en) * | 2000-04-10 | 2001-10-10 | Campbell Industries Ltd. | Sealing assembly for a tubing rotator |
| CN1666081A (en) * | 2002-05-10 | 2005-09-07 | 乔治·桑德尔·维采瑙 | Control of air conditioning cooling or heating coil |
| CN1846070A (en) * | 2003-07-01 | 2006-10-11 | 埃茨纳特私人有限公司 | Elastic joint element and fastener assembly incorporating the same |
| CN2874180Y (en) * | 2005-12-23 | 2007-02-28 | 王金针 | Sleeve type compensator |
| CN101387365A (en) * | 2008-10-28 | 2009-03-18 | 张杰城 | Pipe end opening blockage |
| CN101761727A (en) * | 2008-11-10 | 2010-06-30 | 扬动股份有限公司 | Orifice sealing device |
| CN202349200U (en) * | 2011-10-18 | 2012-07-25 | 东方电气(广州)重型机器有限公司 | Detachable type water pressure sealing device for large joint pipe |
| CN209084276U (en) * | 2018-09-29 | 2019-07-09 | 东方电气集团东方锅炉股份有限公司 | Outer wall is the mechanical seal protective device of skewed big adapter tube |
-
2018
- 2018-09-29 CN CN201811149136.3A patent/CN109027508B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1046111A (en) * | 1989-04-04 | 1990-10-17 | 法玛通公司 | The method and apparatus of extraction of closure plug from steam generator tube |
| AR248306A1 (en) * | 1992-09-04 | 1995-07-12 | Unger Jorge Alberto Tagtachian | Internal seal for coupling tubes in hydraulic tube tests. |
| CA2305957A1 (en) * | 2000-04-10 | 2001-10-10 | Campbell Industries Ltd. | Sealing assembly for a tubing rotator |
| CN1666081A (en) * | 2002-05-10 | 2005-09-07 | 乔治·桑德尔·维采瑙 | Control of air conditioning cooling or heating coil |
| CN1846070A (en) * | 2003-07-01 | 2006-10-11 | 埃茨纳特私人有限公司 | Elastic joint element and fastener assembly incorporating the same |
| CN2874180Y (en) * | 2005-12-23 | 2007-02-28 | 王金针 | Sleeve type compensator |
| CN101387365A (en) * | 2008-10-28 | 2009-03-18 | 张杰城 | Pipe end opening blockage |
| CN101761727A (en) * | 2008-11-10 | 2010-06-30 | 扬动股份有限公司 | Orifice sealing device |
| CN202349200U (en) * | 2011-10-18 | 2012-07-25 | 东方电气(广州)重型机器有限公司 | Detachable type water pressure sealing device for large joint pipe |
| CN209084276U (en) * | 2018-09-29 | 2019-07-09 | 东方电气集团东方锅炉股份有限公司 | Outer wall is the mechanical seal protective device of skewed big adapter tube |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109027508A (en) | 2018-12-18 |
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