CN201916181U - Long-acting non-leakage plunger piston sealed structure of plunger piston metering pump - Google Patents
Long-acting non-leakage plunger piston sealed structure of plunger piston metering pump Download PDFInfo
- Publication number
- CN201916181U CN201916181U CN2011200155930U CN201120015593U CN201916181U CN 201916181 U CN201916181 U CN 201916181U CN 2011200155930 U CN2011200155930 U CN 2011200155930U CN 201120015593 U CN201120015593 U CN 201120015593U CN 201916181 U CN201916181 U CN 201916181U
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- CN
- China
- Prior art keywords
- ring
- plunger
- plunger piston
- stuffing box
- metering 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.)
- Expired - Lifetime
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Abstract
The utility model relates to a sealed structure of a metering pump fluid end, and aims to provide a long-acting non-leakage plunger piston sealed structure of a plunger piston metering pump. The plunger piston sealed structure comprises a stuffing box, a gland and a compression nut in threaded connection with the stuffing box, wherein the interior of the stuffing box is a cylindrical through hole, and the stuffing box is sequentially mounted with a guide ring, a spacing ring and a combined sleeve gasket in clearance fit; the plunger piston of the plunger piston metering pump sequentially penetrates through the compression nut, the gland, the combined sleeve gasket, the spacing ring and the guide ring in clearance fit; the combined sleeve gasket is annulated column shaped, and at least one annular groove internally provided with a O-seal rings is arranged on the outer column surface; and annular counterbores are arranged at two ends on the inner side surface of the combined sleeve gasket respectively, and a group of O-seal ring and L-seal ring is arranged in every annular counterbore. The long-acting non-leakage plunger piston sealed structure of the plunger piston metering pump has constant precompression and self-sealing action mechanism, excellent sealing and non-leakage effects, small friction force between the sealing part and the plunger piston, long service life, and simple technological structure, and is convenient for installation and maintenance.
Description
Technical field
The utility model relates to metering pump fluid end sealing configuration, is specifically related to a kind of long-acting no leakage plunger sealing configuration that is used for plunger type metering pump.
Background technique
The plunger seal of existing plunger type metering pump all adopts packing seal or shaping packing seal usually.
Packing seal is filler one to be enclosed pack between stuffing box and the plunger, filler is compressed with big impacting force by gland and plays seal action.Its drawback is that friction is big, and power consumption is big, the plunger packing quick abrasion, and leakage rate is bigger, and working life is short.The shaping packing seal is that sealing material is made O-ring seal, and commonly used have V-arrangement, Y shape, an O shape, gives certain pre-pressing force, plays seal action.Problems such as shaping gland sealed friction is less than packing seal, and General is better than packing seal, but still has plunger, filler quick abrasion, and certain leakage rate is arranged, and working life is short.
Above-mentioned two kinds of sealing configurations are surplus plunger average life 4000 hour, surplus filler working life 2000 hour.This inevitable weakness has greatly restricted the using scope of plunger type metering pump.
The model utility content
The technical problems to be solved in the utility model is, overcomes the deficiencies in the prior art, and the plunger sealing configuration is improved, and a kind of long-acting no leakage plunger sealing configuration that is used for plunger type metering pump is provided.
Be the technical solution problem, the utility model solution is:
A kind of long-acting no leakage plunger sealing configuration that is used for plunger type metering pump is provided, comprises stuffing box, gland and be bolted in the gland nut of stuffing box; The inside of described stuffing box is cylindrical hole, and guide ring, spacer ring and combination seal cover are housed successively movingly, and the plunger of plunger type metering pump passes gland nut, gland, combination seal cover, spacer ring and guide ring successively movingly; Described combination seal cover is central column, and its outer cylinder is provided with the annular groove of at least one built-in O-ring seals; A ring-type counterbore is respectively established at the two ends of combination seal cover inner side surface, and one group of O-ring seals and L shaped seal ring are set in each ring-type counterbore.
As a kind of improvement, the cross section of described ring-type counterbore is square, and the size in the width of L shaped seal ring and ring-type counterbore cross section is complementary, and O-ring seals places in the opening of L shaped sealing ring.
As a kind of improvement, the opening of described L shaped seal ring is all towards the direction of media cavity.
As a kind of improvement, described guide ring is the guide ring that modified ptfe makes, and described L shaped seal ring is the L shaped seal ring that modified ptfe makes, and described O-ring seals is a rubber o-ring.
As a kind of improvement, has suitable between centers crack between described L shaped seal ring and the counterbore.
As a kind of improvement, the end face that described stuffing box and plunger pump head join is provided with the annular groove of at least one built-in O-ring seals.
The beneficial effects of the utility model are:
1, have weighing apparatus fixed precompression and self-tightening mechanism, the sealing effect excellence does not have and leaks;
2, the friction between sealed member and the plunger is very little, long service life; Wherein, seal ring working life is greater than 5000 hours, and plunger working life was greater than 8000 hours;
3, process structure is simple, and installation and maintenance are convenient.
Description of drawings
Fig. 1 is a plunger type metering pump fluid end structural drawing of the present utility model.
Fig. 2 is a sealing configuration structural drawing of the present utility model.
Fig. 3 is a sealed member graph of a relation in the ring-type counterbore of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is set forth.
In the present embodiment, the plunger seal structure comprises stuffing box 7, gland 12 and is bolted in the gland nut 13 of stuffing box 7; The end face that stuffing box 7 and plunger pump head 1 join is provided with the annular groove of a built-in O-ring seals 2.
The inside of stuffing box 7 is cylindrical hole, and guide ring 3, spacer ring 4 and combination seal cover 5 are housed successively movingly, and the plunger 9 of plunger type metering pump passes gland nut 13, gland 12, combination seal cover 5, spacer ring 4 and guide ring 3 successively movingly; Described combination seal cover 5 is central column, and its outer cylinder is provided with the annular groove of a built-in O-ring seals 6; Combination seal overlaps the two ends of 5 inner side surfaces and respectively establishes a ring-type counterbore 11, and one group of O-ring seals 14 and L shaped seal ring 8 are set in each ring-type counterbore 11.
The cross section of described ring-type counterbore 11 is square, and the size in the width of L shaped seal ring 8 and ring-type counterbore 11 cross sections is complementary, and has suitable axial clearance between L shaped seal ring 8 and the ring-type counterbore 11.All towards the direction of media cavity 10, O-ring seals 14 places in the opening of L shaped seal ring 8 opening of L shaped seal ring 8.Guide ring 3 and L shaped seal ring 8 are modified ptfe materials, and O- ring seals 2,6,14 all is rubber materials.
Working principle of the present utility model is:
Screw gland nut 13, O-ring seals 14 extrusions produce suitable radial component, reach L shaped seal ring 8 and play the normal pressure sealing.When plunger 9 to left movement, media cavity 10 pressure raise, and also have this moment the medium of trace to penetrate into L shaped seal ring 8 places, under the pressure medium effect, the lip of L shaped seal ring 8 further is adjacent to plunger 9, strengthens the sealing effect of combination seal cover 5.O-ring seals 6 is a static seal, the seepage between blocking-up stuffing box 7 and the combination seal cover 5.Guide ring 3 is located movingly with plunger 9, guarantees the concentricity of plunger 9 and L shaped seal ring 8.Spacer ring 4 is used for the axial stiffness location of combination seal cover 5, sets up the seal action under the normal pressure.
At last, it is also to be noted that what more than enumerate only is specific embodiment of the utility model.Obviously, the utility model is not limited to above embodiment, and many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from the disclosed content of the utility model all should be thought protection domain of the present utility model.
Claims (6)
1. the long-acting no leakage plunger sealing configuration that is used for plunger type metering pump, comprise stuffing box, gland and be bolted in the gland nut of stuffing box, it is characterized in that, the inside of described stuffing box is cylindrical hole, guide ring, spacer ring and combination seal cover are housed successively movingly, and the plunger of plunger type metering pump passes gland nut, gland, combination seal cover, spacer ring and guide ring successively movingly; Described combination seal cover is central column, and its outer cylinder is provided with the annular groove of at least one built-in O-ring seals; A ring-type counterbore is respectively established at the two ends of combination seal cover inner side surface, and one group of O-ring seals and L shaped seal ring are set in each ring-type counterbore.
2. plunger seal structure according to claim 1 is characterized in that the cross section of described ring-type counterbore is square, and the size in the width of L shaped seal ring and ring-type counterbore cross section is complementary, and O-ring seals places in the opening of L shaped sealing ring.
3. plunger seal structure according to claim 1 is characterized in that, the opening of described L shaped seal ring is all towards the direction of media cavity.
4. according to any described plunger seal structure in the claim 1 to 3, it is characterized in that described guide ring is the guide ring of modified ptfe, described L shaped seal ring is the L shaped seal ring of modified ptfe, and described O-ring seals is a rubber o-ring.
5. according to any described plunger seal structure in the claim 1 to 3, it is characterized in that having suitable between centers crack between described L shaped seal ring and the counterbore.
6. according to any described plunger seal structure in the claim 1 to 3, it is characterized in that the end face that described stuffing box and plunger pump head join is provided with the annular groove of at least one built-in O-ring seals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200155930U CN201916181U (en) | 2011-01-18 | 2011-01-18 | Long-acting non-leakage plunger piston sealed structure of plunger piston metering pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200155930U CN201916181U (en) | 2011-01-18 | 2011-01-18 | Long-acting non-leakage plunger piston sealed structure of plunger piston metering pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201916181U true CN201916181U (en) | 2011-08-03 |
Family
ID=44415978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200155930U Expired - Lifetime CN201916181U (en) | 2011-01-18 | 2011-01-18 | Long-acting non-leakage plunger piston sealed structure of plunger piston metering pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201916181U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080651A (en) * | 2011-01-18 | 2011-06-01 | 杭州大潮石化设备有限公司 | Long-acting no-leakage plunger sealing structure for plunger type measuring pump |
| CN113404688A (en) * | 2021-05-06 | 2021-09-17 | 普顿流体技术（深圳）有限公司 | Miniature double-hole precision injection pump |
-
2011
- 2011-01-18 CN CN2011200155930U patent/CN201916181U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080651A (en) * | 2011-01-18 | 2011-06-01 | 杭州大潮石化设备有限公司 | Long-acting no-leakage plunger sealing structure for plunger type measuring pump |
| CN102080651B (en) * | 2011-01-18 | 2012-07-25 | 杭州大潮石化设备有限公司 | Long-acting no-leakage plunger sealing structure for plunger type measuring pump |
| CN113404688A (en) * | 2021-05-06 | 2021-09-17 | 普顿流体技术（深圳）有限公司 | Miniature double-hole precision injection pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110803 Effective date of abandoning: 20120725 |