CN111706502A - Sealing device for high-pressure plunger water injection pump packing of offshore oil platform - Google Patents
Sealing device for high-pressure plunger water injection pump packing of offshore oil platform Download PDFInfo
- Publication number
- CN111706502A CN111706502A CN202010408791.7A CN202010408791A CN111706502A CN 111706502 A CN111706502 A CN 111706502A CN 202010408791 A CN202010408791 A CN 202010408791A CN 111706502 A CN111706502 A CN 111706502A
- Authority
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- China
- Prior art keywords
- packing
- ring
- plunger
- water injection
- injection pump
- 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
Links
- 238000012856 packing Methods 0.000 title claims abstract description 72
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 238000002347 injection Methods 0.000 title claims abstract description 36
- 239000007924 injection Substances 0.000 title claims abstract description 36
- 238000007789 sealing Methods 0.000 title claims abstract description 35
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000007906 compression Methods 0.000 claims description 8
- 230000006837 decompression Effects 0.000 claims description 8
- 230000006835 compression Effects 0.000 claims description 7
- 239000003292 glue Substances 0.000 claims description 3
- 230000003139 buffering effect Effects 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 14
- 230000000694 effects Effects 0.000 description 3
- -1 polytetrafluoroethylene Polymers 0.000 description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- RIRXDDRGHVUXNJ-UHFFFAOYSA-N [Cu].[P] Chemical compound [Cu].[P] RIRXDDRGHVUXNJ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/02—Packing the free space between cylinders and pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/22—Arrangements for enabling ready assembly or disassembly
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
- Sealing Devices (AREA)
Abstract
The invention provides a sealing device for a packing of a high-pressure plunger water injection pump of an offshore oil platform, which comprises a packing box sleeved on a plunger, wherein a pressure reducing bottom ring, a V-shaped ring group, a pressure ring, a packing sealing group and an end cover are sequentially sleeved on the plunger from the medium direction upwards in a gap between the packing box and the plunger, a V-shaped opening of the V-shaped ring group faces the medium side, and the inner diameters of the pressure reducing bottom ring, the V-shaped ring group, the pressure ring and the packing sealing group are matched with the outer diameter of the plunger. The V-ring of the present invention increases due to its opening toward the medium side, thereby buffering the pressure from the medium; silica gel core packing replaces spring box compensation system from taking silica gel core structure, provides the sealed compensation power that lasts, has greatly reduced the complexity of installation.
Description
Technical Field
The invention relates to the technical field of offshore oil platform high-pressure plunger water injection pumps, in particular to a sealing device for a high-pressure plunger water injection pump packing of an offshore oil platform.
Background
The high-pressure plunger water injection pump is used as key equipment of an offshore oil platform. In oil and gas field exploitation, water injection exploitation is a common process, and the specific mode is that water is injected into an oil reservoir through a water injection well after being injected and pressurized by a water injection pump, so that the pressure of the oil reservoir is maintained or recovered, the oil reservoir has strong driving force, and the exploitation speed and the recovery ratio of the oil reservoir are improved. Therefore, the water injection system is the basic guarantee of stable production of the oil field, the water injection pump is the heart of the water injection system, and the good running state of the water injection pump can ensure normal production operation on the platform, so that the potential safety hazard in the transfer of the high-pressure plunger water injection pump is eliminated, and the safe and stable running of the water injection pump is ensured.
At present, a high-pressure plunger water injection pump is mainly sealed in a packing sealing mode. Packing (packing), also called sealing packing, is usually woven from softer threads, and strips, usually square or rectangular or circular in cross-section, are filled in a sealing cavity to achieve sealing. The stuffing seal is firstly to prevent the liquid flow from leaking by the fiber plug such as cotton and hemp in the leakage passage, and is mainly used as the shaft seal of the water lifting machine. Packing is widely used for the shaft seal of centrifugal pumps, compressors, vacuum pumps, blenders and ship propellers, the reciprocating shaft seal of piston pumps, reciprocating compressors and refrigerators, the rotary seal of various valve stems and the like. Due to the limitations of the design and the working condition of the high-pressure plunger water injection pump, the high failure rate of the high-pressure plunger water injection pump of the offshore oil platform is a normal state, and the used common packing seal cannot meet the operation and use requirements of the high-pressure plunger water injection pump in the form.
The sealing mode of a high-pressure plunger water injection pump in the prior art is shown in fig. 2, and the sealing mode mainly has the following problems:
firstly, due to the increase of medium pressure in operation, the compression amount needs to be compressed more tightly, and the compression is too tight, so that the friction between a piston and a packing is increased, and the existing sealing structure has no auxiliary lubrication and only carries out lubrication and cooling through reasonable leakage amount. When the unit is operated for a long time to cause high temperature at the parts such as the plunger and the like, a small amount of leakage amount cannot meet the cooling and lubricating effects, and after the unit is operated for a period of time, the packing can be carbonized and solidified without compression amount, so that the sealing effect cannot be achieved.
Secondly, after the packing operates for a period of time, high temperature makes the packing expand, and density reduces, and the unit operation is in the operation in-process, and the packing bears the impact load when compressing for a long time, causes the packing fatigue, and the packing structure damage will appear for a long time, causes the plunger to puncture.
In addition, in the prior art, the two adjacent packing sets are buffered by lead pads, a spring box compensation system consisting of a guide spring seat, a spring and a spring base which are sequentially arranged is adopted to provide compensation force, and the packing set has the advantages of complex structure, high cost and easiness in loss.
Meanwhile, rotary seal and reciprocating seal packing bear large pressure, the moving directions are different, and the packing is extruded and deformed to cause the motion trail of the piston to change, so that the abrasion of the piston is aggravated, the abrasion of the piston is greatly increased, and the piston is prematurely scrapped.
In addition, the water injection pressure of high pressure plunger water injection pump is high, and the temperature is high, and the water injection of thorn leaks can be sealed the entering crankcase through the tappet, causes the emulsification of crankcase lubricating oil, causes equipment failure.
Therefore, a technical scheme capable of solving the problem of frequent sealing leakage of the high-pressure plunger water injection pump is urgently needed in the prior art.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a sealing device for a high-pressure plunger water injection pump packing of an offshore oil platform.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the utility model provides a sealing device for offshore oil platform high pressure plunger water injection pump packing, establishes the packing box on the plunger including the cover, it is inherent in the space between packing box and the plunger upwards overlap in proper order from the medium direction on the plunger and be equipped with decompression end ring, V type ring group, clamping ring, the sealed group of packing and end cover, the V type opening of V type ring group is towards the medium side, the decompression end ring the V type ring group the clamping ring with the sealed internal diameter of organizing of packing with the external diameter of plunger agrees with mutually.
And the contact surfaces of the end cover and the packing box are provided with sealing glue, and the inner side of the end cover is tightly attached to the plunger.
The top of the pressure reducing bottom ring is provided with a V-shaped bulge.
And a V-shaped groove is formed in the bottom of the compression ring.
The V-ring set includes at least two stages of V-rings.
The packing seal assembly comprises at least two silica gel core packing.
Compared with the prior art, the invention has the beneficial effects that: the pressure reducing bottom ring can buffer the pressure from the medium; when the pressure increases, the V-ring increases because of its opening toward the medium side, thereby buffering the pressure from the medium; the compression ring can keep the V-shaped ring under continuous pressure, the V-shaped ring is initially sealed and decompressed, the silica gel core is provided with a silica gel core structure, a spring box compensation system in the prior art is replaced, continuous sealing compensation force is provided, the installation complexity is greatly reduced, and the service life of the sealing device is prolonged; the V-shaped ring made of the modified polytetrafluoroethylene material has higher elastoplasticity, followability, wear resistance and temperature resistance; and the structure of the multistage sealing ring is convenient to disassemble.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural diagram of a packing device in the prior art.
Reference numerals: 101-decompression bottom ring, 102-V-shaped ring set, 103-compression ring, 104-packing seal set, 105-end cover, 106-packing box, 1-plunger, 2-packing box gland, 3-gland bush, 4-packing, 5-lead gasket, 6-locating sleeve, 7-guide spring seat, 8-spring, 9-spring base, 10-packing box, 11-packing box flange, 12-lifting ring, 13-rectangular sealing ring, 14-stud bolt and 15-hexagon nut.
Detailed Description
The invention is further illustrated by the following specific embodiments.
The sealing device for the offshore oil platform high-pressure plunger water injection pump packing comprises a packing box 106 sleeved on a plunger 1, wherein a pressure reducing bottom ring 101, a V-shaped ring set 102, a pressure ring 103, a packing sealing set 104 and an end cover 105 are sequentially sleeved on the plunger 1 from the medium direction upwards in a gap between the packing box 106 and the plunger 1, a V-shaped opening of the V-shaped ring set 102 faces the medium side, and the inner diameters of the pressure reducing bottom ring 101, the V-shaped ring set 102, the pressure ring 103 and the packing sealing set 104 are matched with the outer diameter of the plunger 1. And sealing glue is arranged on the contact surfaces of the end cover 105 and the packing box 106, and the inner side of the end cover 105 is tightly attached to the plunger 1, so that the end cover 105 and the packing box 106 are sealed. The top of the pressure reducing bottom ring 101 is provided with a V-shaped bulge. The bottom of the pressing ring 103 is provided with a V-shaped groove. V-ring set 102 includes at least two V-rings, which in this embodiment have seven stages. The first V-shaped ring fits with the decompression bottom ring 101, and the last V-shaped ring fits with the compression ring 103. The packing set 104 includes at least two silica gel core packings, four silica gel core packings in this embodiment. In the embodiment, the pressure reducing bottom ring 101 is made of phosphor copper, the V-shaped ring is made of modified polytetrafluoroethylene, the modified polytetrafluoroethylene has certain elastic plasticity, and when the filler is axially compressed, the filler has certain compensation capacity, namely good following performance; the lubricating oil has stable chemical properties, is not easy to be corroded and swelled by a medium, is not easy to pollute the medium, has good self-lubricating property and small friction coefficient, and can bear certain temperature after being heated by friction.
When a water injection pump performs water injection mining work, a high-pressure plunger of the water injection pump receives an impact load from a medium side for a long time. The decompression bottom ring 101 bears the medium pressure firstly, the first stage of the V-shaped ring is tightly attached and matched with the V-shaped bulge of the decompression bottom ring 101, and the multi-stage V-shaped rings are tightly attached step by step to reduce the medium pressure. The elasticity of V type ring is good, because V type mouth is towards decompression bottom ring 101, when bearing medium pressure, V type mouth opening can increase, and medium pressure can be alleviateed to V type ring group 102 that multistage V type ring constitutes to play preliminary sealed effect. The packing seal assembly 104 composed of multiple stages of silica gel core packing can replace a spring box compensation system in the prior art, and when the packing seal assembly bears pressure from a medium side, a silica gel core carried in the silica gel core packing can provide continuous compensation force. The end cover 105 seals the packing box 106, when the V-shaped ring set 102 and the packing seal set 104 move upwards, the end cover 105 can press the packing seal set 104, and the sealing effect of the sealing device is further guaranteed.
The above description is only for the preferred embodiment of the present invention, but the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes and modifications without departing from the inventive concept of the present invention, which falls into the protection scope of the present invention.
Claims (6)
1. The utility model provides a sealing device for offshore oil platform high pressure plunger water injection pump packing, establishes packing box (106) on plunger (1) including the cover, characterized by, packing box (106) with it is interior in the space between plunger (1) upwards overlap in proper order from the medium direction on plunger (1) and be equipped with decompression end ring (101), V type ring group (102), clamping ring (103), packing seal group (104) and end cover (105), the V type opening of V type ring group (102) is towards the medium side, decompression end ring (101) V type ring group (102) clamping ring (103) with the internal diameter of packing seal group (104) with the external diameter of plunger (1) agrees with mutually.
2. The sealing device for the offshore oil platform high-pressure plunger water injection pump packing according to claim 1, characterized in that a sealing glue is arranged on the contact surface of the end cover (105) and the packing box (106), and the inner side of the end cover (105) is tightly attached to the plunger (1).
3. The sealing device for the offshore oil platform high-pressure plunger water injection pump packing according to claim 1, wherein a V-shaped bulge is arranged at the top of the pressure reducing bottom ring (101).
4. The sealing device for the offshore oil platform high-pressure plunger water injection pump packing according to claim 1, characterized in that a V-shaped groove is formed at the bottom of the compression ring (103).
5. The sealing device for the offshore oil platform high pressure plunger water injection pump packing set of claim 1, wherein the V-ring set (102) comprises at least two stages of V-rings.
6. The sealing device for the offshore oil platform high-pressure plunger water injection pump packing set according to claim 1, wherein the packing set (104) comprises at least two silica gel core packing sets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010408791.7A CN111706502A (en) | 2020-05-14 | 2020-05-14 | Sealing device for high-pressure plunger water injection pump packing of offshore oil platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010408791.7A CN111706502A (en) | 2020-05-14 | 2020-05-14 | Sealing device for high-pressure plunger water injection pump packing of offshore oil platform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111706502A true CN111706502A (en) | 2020-09-25 |
Family
ID=72536976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010408791.7A Pending CN111706502A (en) | 2020-05-14 | 2020-05-14 | Sealing device for high-pressure plunger water injection pump packing of offshore oil platform |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111706502A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114576158A (en) * | 2022-03-29 | 2022-06-03 | 四川宝石机械专用车有限公司 | Differential pressure type fracturing pump plunger sealing device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2900863Y (en) * | 2006-04-19 | 2007-05-16 | 宝鸡石油机械有限责任公司 | Automatic compensating plunger seal device for well drilling pump |
| CN101196240A (en) * | 2006-12-06 | 2008-06-11 | 安藤成雄 | High pressure sealing apparatus |
| CN201110376Y (en) * | 2007-12-17 | 2008-09-03 | 张志伟 | Novel combined sealing filler loop |
| CN201111559Y (en) * | 2007-09-29 | 2008-09-10 | 上海连成（集团）有限公司 | Packing of centrifugal pump packing seal |
| CN211924446U (en) * | 2020-03-30 | 2020-11-13 | 天津市匹克机电设备有限公司 | High-pressure reciprocating pump seal group |
| CN212959070U (en) * | 2020-05-14 | 2021-04-13 | 中海石油(中国)有限公司秦皇岛32-6作业公司 | Sealing device for high-pressure plunger water injection pump packing of offshore oil platform |
-
2020
- 2020-05-14 CN CN202010408791.7A patent/CN111706502A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2900863Y (en) * | 2006-04-19 | 2007-05-16 | 宝鸡石油机械有限责任公司 | Automatic compensating plunger seal device for well drilling pump |
| CN101196240A (en) * | 2006-12-06 | 2008-06-11 | 安藤成雄 | High pressure sealing apparatus |
| CN201111559Y (en) * | 2007-09-29 | 2008-09-10 | 上海连成（集团）有限公司 | Packing of centrifugal pump packing seal |
| CN201110376Y (en) * | 2007-12-17 | 2008-09-03 | 张志伟 | Novel combined sealing filler loop |
| CN211924446U (en) * | 2020-03-30 | 2020-11-13 | 天津市匹克机电设备有限公司 | High-pressure reciprocating pump seal group |
| CN212959070U (en) * | 2020-05-14 | 2021-04-13 | 中海石油(中国)有限公司秦皇岛32-6作业公司 | Sealing device for high-pressure plunger water injection pump packing of offshore oil platform |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114576158A (en) * | 2022-03-29 | 2022-06-03 | 四川宝石机械专用车有限公司 | Differential pressure type fracturing pump plunger sealing device |
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