阅读说明：本技术 一种用于海上石油平台高压柱塞注水泵盘根的密封装置 (Sealing device for high-pressure plunger water injection pump packing of offshore oil platform ) 是由 曹玉林 宋海生 秦兆刚 安创峰 刘朋远 罗如岗 赵士奇 于 2020-05-14 设计创作，主要内容包括：本发明提供了一种用于海上石油平台高压柱塞注水泵盘根的密封装置,包括套设在柱塞上的盘根盒,所述盘根盒与柱塞之间的空隙内在所述柱塞上自介质方向向上依次套设有减压底环、V型环组、压环、盘根密封组和端盖,所述V型环组的V型开口朝向介质侧,所述减压底环、所述V型环组、所述压环和所述盘根密封组的内径与所述柱塞的外径相契合。本发明中V型环由于其开口朝向介质侧而增大,从而缓冲来自介质的压力；硅胶芯盘根自带硅胶芯结构,代替弹簧盒补偿系统,提供持续的密封补偿力,极大地降低了安装的复杂程度。(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.)

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.

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.

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.