CN203516074U - Electrical heating sealing structure of low-temperature reciprocating pump - Google Patents
Electrical heating sealing structure of low-temperature reciprocating pump Download PDFInfo
- Publication number
- CN203516074U CN203516074U CN201320625660.XU CN201320625660U CN203516074U CN 203516074 U CN203516074 U CN 203516074U CN 201320625660 U CN201320625660 U CN 201320625660U CN 203516074 U CN203516074 U CN 203516074U
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- CN
- China
- Prior art keywords
- electric heating
- pump housing
- low temperature
- reciprocating pump
- temperature reciprocating
- 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.)
- Expired - Lifetime
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- 238000007789 sealing Methods 0.000 title claims abstract description 44
- 238000010438 heat treatment Methods 0.000 title abstract description 8
- 238000004880 explosion Methods 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 238000005485 electric heating Methods 0.000 claims description 25
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- 229910002804 graphite Inorganic materials 0.000 claims description 11
- 239000010439 graphite Substances 0.000 claims description 11
- 238000009304 pastoral farming Methods 0.000 claims description 10
- 210000004907 gland Anatomy 0.000 claims description 7
- 238000012986 modification Methods 0.000 claims description 6
- 230000004048 modification Effects 0.000 claims description 6
- 238000012856 packing Methods 0.000 claims description 4
- 238000003491 array Methods 0.000 claims description 3
- 238000005065 mining Methods 0.000 abstract description 3
- 238000011160 research Methods 0.000 abstract description 3
- 238000003889 chemical engineering Methods 0.000 abstract 1
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 9
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010977 unit operation Methods 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Images
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- Compressor (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The utility model relates to a sealing structure adopted in a low-temperature reciprocating pump, in particular to an electrical heating sealing structure of the low-temperature reciprocating pump, wherein the electrical heating sealing structure is needed in the industries of chemical engineering, industrial and mining enterprises, national defence scientific researches and the like. The electrical heating sealing structure comprises a pump body. A piston rod is arranged in the pump body, a front section liquid medium sealing portion, a gas storage cavity, a rear section gas phase medium sealing portion, a guide sleeved and a compression nut are sequentially and tightly arranged surrounding the outer wall of the piston rod from one side of a cylinder in the pump body to the outer side, and an anti-explosion electrical heating band is arranged at a position, close to the gas storage cavity, of an outer shell of the pump body. Accordingly, sealing performance is better, and the service life is longer.
Description
Technical field
the utility model relates to the sealing configuration that low temperature reciprocating pump is taked, and is specially the required low temperature reciprocating pump of the industry electric heating sealing configurations such as a kind of chemical industry, industrial and mining enterprise, national defence scientific research.
Background technique
the required low temperature reciprocating pump of the industries such as chemical industry, industrial and mining enterprise, national defence scientific research is mainly for delivery of cryogenic medias such as small flow, high-pressure liquefaction rock gas, liquid hydrogen, liquid oxygen, to sealing reliability, sealing life length require high, existing low temperature reciprocating pump seal master is when discharge pressure>=20MPa, sealing life is all less than normal: about 1000h, the reliability of sealing is poor, and then affects the operational safety of unit.When transporting low temperature medium, changing sealing need to rise again to pump head, open exhaust-valve, bleed off interior media, pull down lower pump head, again after start, need pump head and the precooling of turnover pipeline, liquid medium vaporization, causes dielectric loss, on the other hand also befouling environment, cause environmental pollution, repair and replacement cost is higher.
Model utility content
the purpose of this utility model is to provide the low temperature reciprocating pump electric heating sealing configuration of a kind of better tightness, longer service life.
above-mentioned technical purpose of the present utility model is achieved by the following technical programs: a kind of low temperature reciprocating pump electric heating sealing configuration, comprise the pump housing, in the described pump housing, there is piston rod, around piston rod outer wall, by the cylinder one side direction outside of pump body successively close-packed arrays leading portion liquid medium sealing portion, air storing cavity, back segment gas phase media sealed department, guide sleeve and gland nut, described pump housing shell is provided with anti-explosion electric heating tape by the position of described air storing cavity.
in technique scheme, leading portion liquid medium sealing portion effectively prevents that in cylinder, liquid medium is revealed, but when having medium to reveal, trace medium is leaked into air storing cavity, vaporization under the effect of anti-explosion electric heating tape, air storing cavity medium exists with gaseous state all the time, back segment gas phase media sealed department is for the sealing of gas phase media in this air storing cavity, in addition, can be by being screwed into gland nut, increase decrement and realize continuation sealing, improved the life-span of gas seal, and outside anti-explosion electric heating tape heat tape is mainly right, back segment gas phase media sealed department and air storing cavity dielectric heating, reduce the low-temperature shrink distortion of sealed department, reduce the low temperature brittleness of material, improve its lubricity, heating simultaneously, balance air storing cavity temperature, make its pressure keep constant, form sealing gland, can reveal medium to leading portion seals.
as to of the present utility model preferably, leading portion liquid medium sealing portion comprises row's lip seal and a dish spring, the tetrafluoro filling sealed department that back segment gas phase media sealed department comprises spaced graphite grazing pad and is provided with between adjacent two graphite grazing pad intervals and air storing cavity and adjacent graphite grazing pad.
during this is preferred, adopt the compound seal mode of graphite and tetrafluoro filler combination to there is self lubricity, reduced frictional heat, lip seal adopts the sealing of lip limit, is linear sealing structure, when there is seal leakage, can also be by being screwed into inwards gland nut, under dish spring active force, increase each lip limit sealing and realize continuation sealing with the laminating of piston rod, extend its working life.
as to of the present utility model preferably, lip seal is installed on one and fits tightly with pump housing inwall and with the mosaic block that is useful on the mounting groove of the described lip seal of installation.Concentricity while improving unit operation, reduces piston vibration of bar.
as to of the present utility model preferably, by being provided with packing ring between first mosaic block in the cylinder one side direction outside of pump body and last mosaic block and described pump housing inwall.Reduce piston vibration of bar.
as to of the present utility model preferably, lip seal is polytetrafluoroethylsealed sealed of modification.Polytetrafluoroethylsealed sealed friction of modification is little, and wear rate is low, and during low temperature, shrinkage is low, and its life-span is 3 times of common tetrafluoro product.
as to of the present utility model preferably, anti-explosion electric heating tape is flat.Safety durable, homogeneous heating, overall structure is had to good protective action.
as to of the present utility model preferably, pump housing shell is provided with radiating fin.Improve radiating efficiency and guarantee structure stability later.
as to of the present utility model preferably, radiating fin and anti-explosion electric heating tape be relative shape distribution on pump housing shell.Further optimizing the conveying of heat shifts.
the beneficial effects of the utility model: this structure is by adopting special sealing material and structure, concentricity while improving unit operation, reduce piston vibration of bar, can improve sealing life to about 3000h, extended the device maintenance replacement cycle, reduced operating cost, also reduced exhaust emission, improved the reliability of sealing, reduced sealing and changed number of times simultaneously, reduce repair and replacement and the operating cost of unit, also reduced environmental pollution simultaneously.
Accompanying drawing explanation
fig. 1 is the utility model embodiment 1 structural representation.
in figure: 1, the pump housing, 2, piston rod, 3, cylinder, 4, air storing cavity, 5, guide sleeve, 6, gland nut, 7, lip seal, 8, dish spring, 9, graphite grazing pad, 10, tetrafluoro fills sealed department, 11, packing ring, 12, anti-explosion electric heating tape, 13, radiating fin, 71, mosaic block.
Embodiment
following specific embodiment is only to explanation of the present utility model; it is not to restriction of the present utility model; those skilled in the art can make to the present embodiment the modification that there is no creative contribution as required after reading this specification, but as long as within the scope of claim of the present utility model, are all subject to the protection of Patent Law.
embodiment 1, as shown in Figure 1, a kind of low temperature reciprocating pump electric heating sealing configuration, comprise the pump housing 1, in the pump housing 1, there is piston rod 2, around piston rod 2 outer walls, by the cylinder 3 one side direction outsides of the pump housing 1 inside successively close-packed arrays leading portion liquid medium sealing portion, air storing cavity 4, back segment gas phase media sealed department, guide sleeve 5 and gland nut 6, the pump housing 1 shell is provided with anti-explosion electric heating tape 12 by the position of air storing cavity 4.Leading portion liquid medium sealing portion comprises row's lip seal 7 and a dish spring 8, the tetrafluoro filling sealed department 10 that back segment gas phase media sealed department comprises spaced graphite grazing pad 9 and is provided with between adjacent two graphite grazing pad 9 intervals and air storing cavity 4 and adjacent graphite grazing pad 9, lip seal 7 is installed on one and fits tightly with the pump housing 1 inwall and with the mosaic block 71 that is useful on the mounting groove that lip seal 7 is installed, by being provided with packing ring 11 between first mosaic block 71 in the cylinder 3 one side direction outsides of the pump housing 1 inside and last mosaic block 71 and the pump housing 1 inwall, lip seal 7 is polytetrafluoroethylsealed sealed of modification, can adopt modification tetrafluoro lip seal circle, anti-explosion electric heating tape 12 is flat, the pump housing 1 shell is provided with radiating fin 13, radiating fin 13 distributes with anti-explosion electric heating tape 12 relative shape on the pump housing 1 shell.
Claims (8)
1. a low temperature reciprocating pump electric heating sealing configuration, comprise the pump housing (1), in the described pump housing (1), there is piston rod (2), it is characterized in that: around piston rod (2) outer wall, by inner cylinder (3) the one side direction outsides of the pump housing (1) successively close-packed arrays leading portion liquid medium sealing portion, air storing cavity (4), back segment gas phase media sealed department, guide sleeve (5) and gland nut (6), the described pump housing (1) shell leans on the position of described air storing cavity (4) to be provided with anti-explosion electric heating tape (12).
2. a kind of low temperature reciprocating pump electric heating sealing configuration according to claim 1, it is characterized in that: leading portion liquid medium sealing portion comprises row's lip seal (7) and a dish spring (8), back segment gas phase media sealed department comprises spaced graphite grazing pad (9) and is positioned at the tetrafluoro being provided with between adjacent two graphite grazing pad (9) intervals and air storing cavity (4) and adjacent graphite grazing pad (9) fills sealed department (10).
3. a kind of low temperature reciprocating pump electric heating sealing configuration according to claim 2, is characterized in that: lip seal (7) is installed on one and fits tightly with the pump housing (1) inwall and with the mosaic block (71) that is useful on the mounting groove that described lip seal (7) is installed.
4. a kind of low temperature reciprocating pump electric heating sealing configuration according to claim 3, is characterized in that: by being provided with packing ring (11) between first mosaic block (71) in inner cylinder (3) the one side direction outsides of the pump housing (1) and last mosaic block (71) and the described pump housing (1) inwall.
5. a kind of low temperature reciprocating pump electric heating sealing configuration according to claim 4, is characterized in that: lip seal (7) is polytetrafluoroethylsealed sealed of modification.
6. a kind of low temperature reciprocating pump electric heating sealing configuration according to claim 5, is characterized in that: anti-explosion electric heating tape (12) are flat.
7. according to a kind of low temperature reciprocating pump electric heating sealing configuration described in claim 1 or 2 or 3 or 4 or 5 or 6, it is characterized in that: the pump housing (1) shell is provided with radiating fin (13).
8. a kind of low temperature reciprocating pump electric heating sealing configuration according to claim 7, is characterized in that: radiating fin (13) distributes with anti-explosion electric heating tape (12) relative shape on the pump housing (1) shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320625660.XU CN203516074U (en) | 2013-10-11 | 2013-10-11 | Electrical heating sealing structure of low-temperature reciprocating pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320625660.XU CN203516074U (en) | 2013-10-11 | 2013-10-11 | Electrical heating sealing structure of low-temperature reciprocating pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203516074U true CN203516074U (en) | 2014-04-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320625660.XU Expired - Lifetime CN203516074U (en) | 2013-10-11 | 2013-10-11 | Electrical heating sealing structure of low-temperature reciprocating pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203516074U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103498791A (en) * | 2013-10-11 | 2014-01-08 | 湖州三井低温设备有限公司 | Electric heating seal structure of low temperature reciprocating pump |
-
2013
- 2013-10-11 CN CN201320625660.XU patent/CN203516074U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103498791A (en) * | 2013-10-11 | 2014-01-08 | 湖州三井低温设备有限公司 | Electric heating seal structure of low temperature reciprocating pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140402 |
|
| CX01 | Expiry of patent term |