CN205244589U - Packing structure of stop valve - Google Patents
Packing structure of stop valve Download PDFInfo
- Publication number
- CN205244589U CN205244589U CN201521050463.5U CN201521050463U CN205244589U CN 205244589 U CN205244589 U CN 205244589U CN 201521050463 U CN201521050463 U CN 201521050463U CN 205244589 U CN205244589 U CN 205244589U
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- China
- Prior art keywords
- packing box
- box
- stuffing
- valve
- packing
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- 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.)
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Abstract
The utility model discloses a packing structure of stop valve, including the packing box, wear to establish the valve rod in the packing box, be provided with sealing filler between packing box and the valve rod, the last gland that is provided with of sealing filler, the packing box outside is provided with presses the cover nut, the packing box is cascaded packing box, and packing box lower extreme bottom is provided with general stopper, and the inside and outside side of general stopper contacts with packing box wall and valve rod respectively, through the loaded triple packing structure of the coil spring who has rectangular cross section behind the technological improvement, the very big has avoided the valve in the use, because wearing and tearing and factor such as thermal energy, the cryrogenic stop valve that especially is used for the LNG tank wagon is because of bearing the vibration stress, and lead to packing potential the leakages risk at position, ensures that LNG tank car and the filling of sled dress are stood can to move by safe and reliable with the cryrogenic stop valve to the reliability and safety of valve has been improved.
Description
Technical field
The utility model relates to a kind of packing seal structure of stop valve, relates in particular to the packing seal structure of a kind of LNG tank car and skid filling station deep cooling stop valve.
Background technology
The packing seal structure of deep cooling stop valve for the LNG tank car of currently available technology and skid filling station, all adopt filler group hermetically-sealed construction, in use, due to factors such as wearing and tearing and thermal expansions, especially for the deep cooling stop valve of LNG tank car, also to bear vibration stress, cause filler position to be leaked, cause valve short even cisco unity malfunction in service life.
Utility model content
Use deep cooling stop valve in use for LNG tank car and skid filling station, filling-material structure is due to factors such as wearing and tearing and thermal expansions, especially for the deep cooling stop valve of LNG tank car, also to bear vibration stress, cause filler position to be leaked, cause valve short this situation of even cisco unity malfunction in service life, a kind of reasonable in design is provided, effectively control the packing seal structure of filler expansion and multi-layer sealed effect.
A kind of packing seal structure of stop valve, comprise stuffing-box, be located in the valve rod in stuffing-box, between stuffing-box and valve rod, be provided with airtight and watertight padding, in airtight and watertight padding, be provided with gland, stuffing-box arranged outside has gland nut, and described stuffing-box is staged stuffing-box, bottom, stuffing-box lower end is provided with general plug, and general plug medial and lateral contact with valve rod with stuffing-box wall respectively; Described staged stuffing-box lower end, general side are beyond the Great Wall provided with Packing seat, and Packing seat top is provided with airtight and watertight padding; On described gland endoporus and outer wall, be provided with seal groove; Also comprise square-section helical spring, described square-section helical spring is arranged between gland and gland nut.
Compared with prior art, the beneficial effect having is: the triple packing seal structure that load by having the helical spring of square-section after technological improvement, avoid greatly valve in use, due to factors such as wearing and tearing and thermal expansions, especially for the deep cooling stop valve of LNG tank car because bearing vibration stress, and cause the potential risk of leakage at filler position, guarantee that LNG tank car and skid filling station deep cooling stop valve can safe and reliable operation, thereby improved the reliability and safety of valve.
Brief description of the drawings
Fig. 1 is the packing seal structure schematic diagram of the utility model stop valve;
Fig. 2 is that the utility model Rectangular Section Spring loads triple packing seal structure schematic diagrames;
Fig. 3 is the utility model square-section helical spring structure schematic diagram.
Detailed description of the invention
Be illustrated as a kind of embodiment of the packing seal structure of the utility model stop valve, the packing seal structure (Fig. 1) of deep cooling stop valve for a kind of LNG tank car and skid filling station, filler position adopts the helical spring loading structure (Fig. 2) of triple seal and square-section, concrete scheme is that general plug 3 (Fig. 2) is housed in the lower end of staged stuffing-box 1, general plug inside is provided with energy-storaging spring, general plug under the effect of energy-storaging spring power in, outer lip expands respectively, inner lip contacts with valve rod 2, outer lip contacts with stuffing-box wall, thereby realize first sealing, Packing seat 4 (Fig. 2) is equipped with in the upper end of staged stuffing-box, filler group 5 (Fig. 2) is equipped with on Packing seat top, realize second sealing, the endoporus of gland 6 and the seal groove of external diameter 7 of filler group top are equipped with respectively O type circle (Fig. 2), respectively with valve rod and the sealing of stuffing-box wall, realize three seals, the helical spring 9 (Fig. 2) of square-section is housed between gland and gland nut 8, because spring has been stored a certain amount of elasticity energy, when filler causes volume loss because of wearing and tearing and compacting, and vibration, the decline of the filler that different heat expansion etc. cause and valve rod contact force, this elasticity can be able to make up the lax of filler stress, make filler keep sealing at valve run duration, thereby guarantee the service life of effective sealing and the prolongation filler at filler position.
Claims (1)
1. the packing seal structure of a stop valve, comprise stuffing-box, be located in the valve rod in stuffing-box, between stuffing-box and valve rod, be provided with airtight and watertight padding, in airtight and watertight padding, be provided with gland, stuffing-box arranged outside has gland nut, it is characterized in that: described stuffing-box is staged stuffing-box, bottom, stuffing-box lower end is provided with general plug, and general plug medial and lateral contact with valve rod with stuffing-box wall respectively; Described staged stuffing-box lower end, general side are beyond the Great Wall provided with Packing seat, and Packing seat top is provided with airtight and watertight padding; On described gland endoporus and outer wall, be provided with seal groove; Also comprise square-section helical spring, described square-section helical spring is arranged between gland and gland nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521050463.5U CN205244589U (en) | 2015-12-16 | 2015-12-16 | Packing structure of stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521050463.5U CN205244589U (en) | 2015-12-16 | 2015-12-16 | Packing structure of stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205244589U true CN205244589U (en) | 2016-05-18 |
Family
ID=55943666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521050463.5U Active CN205244589U (en) | 2015-12-16 | 2015-12-16 | Packing structure of stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205244589U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112240428A (en) * | 2020-10-14 | 2021-01-19 | 上海沪东造船阀门有限公司 | Composite packing sealing structure |
-
2015
- 2015-12-16 CN CN201521050463.5U patent/CN205244589U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112240428A (en) * | 2020-10-14 | 2021-01-19 | 上海沪东造船阀门有限公司 | Composite packing sealing structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |