CN203585501U - Sealing structure of high-pressure injection needle valve cylinder - Google Patents
Sealing structure of high-pressure injection needle valve cylinder Download PDFInfo
- Publication number
- CN203585501U CN203585501U CN201320784577.7U CN201320784577U CN203585501U CN 203585501 U CN203585501 U CN 203585501U CN 201320784577 U CN201320784577 U CN 201320784577U CN 203585501 U CN203585501 U CN 203585501U
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- China
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- piston rod
- cylinder
- pressure injection
- injection needle
- valve cylinder
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- Expired - Fee Related
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Abstract
The utility model relates to a sealing structure of a high-pressure injection needle valve cylinder. The sealing structure of the high-pressure injection needle valve cylinder comprises a cylinder body, a cylinder end cover, a piston rod and a valve needle, and is characterized in that two sealing rings are arranged on the piston rod on the outer side of the cylinder end cover; lubricating grease fills in a clearance between the two sealing rings; a gland with a central hole penetrates through the piston rod so as to press the two sealing rings on the piston rod onto the cylinder end cover; a sealing ring placement step, which has an equal outer diameter with that of each sealing ring, is coaxially arranged with the central hole of the gland.
Description
Technical field
The utility model and a kind of sealing configuration of injecting needle-valve cylinder, specifically a kind of sealing configuration of high-pressure injection needle-valve cylinder.
Background technique
At present, the sealing configuration of tradition injection needle-valve cylinder, can only seal low-pressure fluid, for high-pressure liquid sealing incessantly, causes high-pressure liquid to penetrate tracheae from front end and the valve stem seal of needle-valve cylinder, causes damage.
Summary of the invention
The technical problems to be solved in the utility model is to provide a kind of sealing configuration of high-pressure injection needle-valve cylinder.
In order to solve the problems of the technologies described above, the sealing configuration of a kind of high-pressure injection needle-valve cylinder of the present utility model, comprise cylinder main body, cylinder end piece, piston rod, needle, it is characterized in that, on the piston rod in the outside of cylinder end piece, two seals circle is set, lubricating grease is squeezed in gap between two seals circle, with a gland with center hole, pass piston rod the two seals circle on piston rod is pressed on cylinder end piece, with gland center hole, a seal ring placement hole equating with two seals circle external diameter is coaxially set.
On the piston rod of the joint of described needle ear end face and piston rod, a seal ring is being set.
Adopt the design's beneficial effect to be: when gland is pressed on cylinder end piece, the seal ring placement hole arranging in gland limits the external diameter of two seals circle to outside distortion, that two seals circle has increased the sealing between piston rod and cylinder end piece when only having inside extrusion piston bar to increase the resistance of piston, in addition in needle retrude, during high-pressure injection, the seal ring arranging on the piston rod of the joint of needle ear end face and piston rod has formed again sealing together between needle and gland, is that high pressure seal result is better.
Accompanying drawing explanation
Fig. 1 is the structural representation of the sealing configuration of a kind of high-pressure injection needle-valve cylinder of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the sealing configuration of a kind of high-pressure injection needle-valve cylinder of the present utility model is described in further detail.
As shown in the figure, the sealing configuration of a kind of high-pressure injection needle-valve cylinder of the present utility model, comprise cylinder main body 1, cylinder end piece 2, piston rod 3, needle 4, it is characterized in that, on the piston rod 3 in the outside of cylinder end piece 2, two seals circle 5 is set, lubricating grease is squeezed in gap between two seals circle 5, gland 8 with one with center hole is pressed in the two seals circle 5 on piston rod 3 on cylinder end piece 2 through piston rod 3, with gland 8 center holes, a seal ring equating with two seals circle 5 external diameters is coaxially set and settles step 9.
On the piston rod 3 of the joint of described needle 4 ear end faces and piston rod 3, a seal ring 10 is being set.
Claims (2)
1. the sealing configuration of a high-pressure injection needle-valve cylinder, comprise cylinder main body (1), cylinder end piece (2), piston rod (3), needle (4), it is characterized in that, on the piston rod (3) in the outside of cylinder end piece (2), two seals circle (5) is set, lubricating grease is squeezed in gap between two seals circle (5), gland (8) with one with center hole is pressed in the two seals circle (5) on piston rod (3) on cylinder end piece (2) through piston rod (3), with gland (8) center hole, a seal ring equating with two seals circle (5) external diameter is coaxially set and settles step (9).
2. the sealing configuration of high-pressure injection needle-valve cylinder according to claim 1, is characterized in that, the piston rod (3) of the joint of described needle (4) ear end face and piston rod (3) is upper, then a seal ring (10) is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320784577.7U CN203585501U (en) | 2013-12-04 | 2013-12-04 | Sealing structure of high-pressure injection needle valve cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320784577.7U CN203585501U (en) | 2013-12-04 | 2013-12-04 | Sealing structure of high-pressure injection needle valve cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203585501U true CN203585501U (en) | 2014-05-07 |
Family
ID=50583420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320784577.7U Expired - Fee Related CN203585501U (en) | 2013-12-04 | 2013-12-04 | Sealing structure of high-pressure injection needle valve cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203585501U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103727291A (en) * | 2013-12-04 | 2014-04-16 | 镇江新区汇达机电科技有限公司 | Sealing structure of high pressure injection needle valve air cylinder |
-
2013
- 2013-12-04 CN CN201320784577.7U patent/CN203585501U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103727291A (en) * | 2013-12-04 | 2014-04-16 | 镇江新区汇达机电科技有限公司 | Sealing structure of high pressure injection needle valve air cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140507 Termination date: 20151204 |
|
| EXPY | Termination of patent right or utility model |