CN203374867U - Ultra-low temperature ball valve - Google Patents
Ultra-low temperature ball valve Download PDFInfo
- Publication number
- CN203374867U CN203374867U CN201320426160.3U CN201320426160U CN203374867U CN 203374867 U CN203374867 U CN 203374867U CN 201320426160 U CN201320426160 U CN 201320426160U CN 203374867 U CN203374867 U CN 203374867U
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- valve
- ultra
- long
- low temperature
- ball valve
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Abstract
The utility model discloses an ultra-low temperature ball valve which comprises a valve body. A valve seat is mounted in the valve body which is provided with a long valve cover, a valve rod is mounted in the long valve cover, an upper sealing device is mounted on the valve rod at the top end of the long valve cover, a ball valve element matched with the valve seat in a pressing mode is mounted at the bottom end of the valve rod, and a pressure relief hole is formed in the ball valve element. A draining board is mounted on the outer wall of the long valve cover in the circumference direction, the long valve cover can reduce heat exchange between the outside and low-temperature media, the draining board can effectively relieve the condition that temperature of the valve body is transmitted to the upper sealing device and the upper end of the valve rod, the effect that temperature of parts above the upper sealing device and the valve rod is higher than 0 DEG C is guaranteed, the draining board can prevent rainwater and condensate water from dripping into the valve, and the pressure relief hole can guarantee that a valve body middle cavity is communicated with an inlet end of the valve body so as to prevent abnormal pressure rise of the middle cavity. The ultra-low temperature ball valve is simple in structure and long in service life.
Description
Technical field
The utility model relates to valve technology field, relates in particular to a kind of ball valve.
Background technique
At present, the open-shut device of ball valve is a spheroid, utilizes spheroid to follow the axis 90-degree rotation of valve rod around valve rod, realizes the purpose of opening and closing.Ball valve is mainly used in cutting off, distributes and change the media flow direction on pipeline, and its major advantage has: 1. have minimum flow resistance; 2. because the time can not blocking in work (at unlubricated dose time), therefore can be applied to reliably in Korrosionsmedium and low-boiling point liquid; 3. in larger pressure and temperature scope, can realize sealing fully; 4. can realize fast opening and closing, operation is without impacting; 5. spherical closure member can automatically be located on boundary position; 6. working medium seals reliably on two-sided; 7. when standard-sized sheet and full cut-off, the sealing surface of spheroid and valve seat and medium are isolated, and therefore high speed can not cause the erosion of sealing surface by the medium of valve; 8. compact structure, lightweight, can think that it is the most rational valve mechanism for the cryogenic media system; 9. the valve body symmetry, can well bear the stress from pipeline; 10. closure member can bear the High Pressure Difference while cutting out, and can reach 30 years working life the highest, be have, the optimal valve of natural gas line.Although the ball valve advantage is a lot, while using it for cryogenic piping, also exist some not enough: 1. cryogenic piping all will install the cold insulation facility additional usually, and the short stem structure of ball valve obviously can not meet the requirement of installing the cold insulation facility to ball valve additional; 2. when using it for cryogenic piping, after ball valve is closed, valve pocket is a confined space, after the cryogenic liquide gasification, can make the pressure of valve pocket sharply increase, and because ball valve does not have decompression function, ball valve is caused danger because of superpressure; 3. because the sealing configuration between valve body and valve seat is close to spool, the pressure sharply risen after the cryogenic liquide gasification can impact sealing configuration, causes seal failure, has greatly shortened its working life.
Summary of the invention
Technical problem to be solved in the utility model is to provide the ultra-low temperature ball valve of a kind of compactness rational in infrastructure, long service life.
For solving the problems of the technologies described above, the technical solution of the utility model is: ultra-low temperature ball valve, comprise valve body, in described valve body, valve seat is installed, long valve gap is installed on described valve body, be equipped with in described long valve gap and run through described long valve gap and bottom and stretch into the valve rod in described valve body, on the described valve rod on described long valve gap top, upper sealing device is installed, the top of described valve rod is equipped with the valve rod slewing gear; The bottom of described valve rod is equipped with the ball valve core with described valve seat compression fit, and described ball valve core is provided with relief hole; Between the outer circumferential face of described valve seat and the inner peripheral surface of described valve body, lower sealing device is installed, described valve seat, away between the end face of described ball valve core and described valve body, pre-tightening apparatus being installed, circumferentially is equipped with draining board on the outer wall of described long valve gap.
As a kind of preferred technological scheme, between described valve body and described long valve gap, be provided with middle flange gasket.
As a kind of preferred technological scheme, described middle flange gasket is stainless steel and Expanded graphite spiral wound gasket.
As a kind of preferred technological scheme, between the bottom of described long valve gap and described valve rod, spring bearing is installed.
As a kind of preferred technological scheme, described pre-tightening apparatus comprises the pretension seat, between described pretension seat and described valve body, preloading spring is installed.
As a kind of preferred technological scheme, described lower sealing device comprises graphite-seal ring.
As a kind of preferred technological scheme, described upper sealing device comprises and is sleeved on described valve rod and filler cover that bottom is fixedly connected with the top of described long valve gap, be filled with stuffing box packing in described filler cover, described filler cover top is equipped with the Gland be fixedly connected with described filler cover.
As a kind of preferred technological scheme, described stuffing box packing is the graphite packing of folder steel wire.
As a kind of preferred technological scheme, described valve rod slewing gear comprises the handle be fixedly connected with described valve rod.
Owing to having adopted technique scheme, ultra-low temperature ball valve, comprise valve body, in described valve body, valve seat is installed, long valve gap is installed on described valve body, be equipped with in described long valve gap and run through described long valve gap and bottom and stretch into the valve rod in described valve body, on the described valve rod on described long valve gap top, upper sealing device is installed, the top of described valve rod is equipped with the valve rod slewing gear; The bottom of described valve rod is equipped with the ball valve core with described valve seat compression fit, and described ball valve core is provided with relief hole; Between the outer circumferential face of described valve seat and the inner peripheral surface of described valve body, lower sealing device is installed, described valve seat, away between the end face of described ball valve core and described valve body, pre-tightening apparatus being installed, circumferentially is equipped with draining board on the outer wall of described long valve gap; Long valve gap can reduce the exchange heat between the external world and cryogenic media, guarantees that the temperature of upper sealing device is more than 0 ℃, guarantees the upper sealing device normal operation; Draining board effectively graduated release valve temperature, to the transmission of upper sealing device and valve rod upper end, further guarantees that the part temperature on upper sealing device and valve rod top is more than 0 ℃, and draining board can also prevent that rainwater and condensed water from splashing into valve; Relief hole can guarantee that the valve body lumen communicates with entrance point, prevents that lumen from boosting extremely; The utility model is simple in structure, long service life.
the accompanying drawing explanation
The following drawings only is intended to the utility model is done and schematically illustrated and explain, does not limit scope of the present utility model.Wherein:
Fig. 1 is the utility model embodiment's structural representation;
In figure: the 1-valve body; The 2-valve seat; The long valve gap of 3-; The 31-draining board; Flange gasket in 32-; The 4-valve rod; The 41-spring bearing; 51-filler cover; The 52-stuffing box packing; The 53-Gland; The 6-handle; The 71-ball valve core; The 72-relief hole; The 8-graphite-seal ring; 91-pretension seat; The 92-preloading spring.
Embodiment
Below in conjunction with drawings and Examples, further set forth the utility model.In the following detailed description, only by the mode of explanation, some example embodiment of the present utility model has been described.Undoubtedly, those of ordinary skill in the art can recognize, in the situation that do not depart from spirit and scope of the present utility model, can to described embodiment, be revised by various mode.Therefore, accompanying drawing is illustrative with being described in essence, rather than for limiting the protection domain of claim.
As shown in Figure 1, ultra-low temperature ball valve, comprise valve body 1, in described valve body 1, valve seat 2 is installed, long valve gap 3 is installed on described valve body 1, be provided with middle flange gasket 32 between described valve body 1 and described long valve gap 3, described middle flange gasket 32 is stainless steel and Expanded graphite spiral wound gasket, be equipped with in described long valve gap 3 and run through described long valve gap 3 and bottom and stretch into the valve rod 4 in described valve body 1, between the bottom of described long valve gap 3 and described valve rod 4, spring bearing 41 is installed, on the described valve rod 4 on described long valve gap 3 tops, upper sealing device is installed, described upper sealing device comprises and is sleeved on described valve rod 4 and filler that bottom is fixedly connected with the top of described long valve gap 3 cover 51, be filled with stuffing box packing 52 in described filler cover 51, described stuffing box packing 52 is the graphite packing of folder steel wire, described filler overlaps 51 tops and is equipped with and described filler cover 51 Glands that are fixedly connected with 53, the top of described valve rod 4 is equipped with the valve rod slewing gear, and described valve rod slewing gear comprises the handle 6 be fixedly connected with described valve rod 4, the bottom of described valve rod 4 is equipped with the ball valve core 71 with described valve seat 2 compression fit, and described ball valve core 71 is provided with relief hole 72, between the inner peripheral surface of the outer circumferential face of described valve seat 2 and described valve body 1, lower sealing device is installed, described lower sealing device comprises graphite-seal ring 8, described valve seat 2 is away between the end face of described ball valve core 71 and described valve body 1, pre-tightening apparatus being installed, described pre-tightening apparatus comprises pretension seat 91, between described pretension seat 91 and described valve body 1, preloading spring 92 is installed, draining board 31 circumferentially is installed on the outer wall of described long valve gap 3.
Long valve gap 3 can reduce the exchange heat between the external world and cryogenic media, guarantees that the temperature at stuffing box packing 52 positions is more than 0 ℃, guarantees stuffing box packing 52 normal operations; Draining board 31 can effectively be alleviated the transmission of valve body 1 temperature to stuffing box packing 52 and valve rod 4 upper ends, further guarantees that the part temperature on stuffing box packing 52 positions and valve rod 4 tops is more than 0 ℃, and draining board 31 can also prevent that rainwater and condensed water from splashing into valve; Relief hole 72 can guarantee that valve body 1 lumen communicates with entrance point, prevents that lumen from boosting extremely; Increase spring bearing 41 in long valve gap 3 bottoms and support valve rod 4, guarantee valve rod 4 stability; Preloading spring 92 strengthens valve seat 2 pretightening forces, guarantees the excellent sealing of valve seat 2 under low-temperature condition; The utility model is simple in structure, long service life.
The parts such as valve body 1, long valve gap 3, valve seat 2, valve rod 4 carry out cryogenic treatment before fine finishing, and the Organizational Structure of stable material, cause Volume Changes to prevent material phase transformation.Valve body 1, long valve gap 3 and internals are carried out de-oiling, ungrease treatment, and valve body 1 inner chamber must keep dry, and to prevent icing under low temperature or fat hardening, damage sealing.Cooling medium adopts liquid nitrogen, and test(ing) medium adopts helium, adopts helium mass analyzer to detect and leaks outside, and in flowmeter detects, leaks.
In the present embodiment, valve body 1 and long valve gap 3 case materials such as grade are selected the good face centered cubic austenite stainless steel of low temperature toughness plasticity CF8/304, CF8M/316, CF3/304L, CF3M/F316L; Seal face materials between valve seat 2 and ball valve core 71 is selected scrape resistence, wear-resisting cobalt base alloy.
Description of the present utility model provides for example with for the purpose of describing, and is not exhaustively or by the utility model to be limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Selecting and describing embodiment is for better explanation principle of the present utility model and practical application, thereby and makes those of ordinary skill in the art can understand the various embodiments with various modifications that the utility model design is suitable for special-purpose.
Claims (9)
1. ultra-low temperature ball valve, comprise valve body, in described valve body, valve seat is installed, long valve gap is installed on described valve body, be equipped with in described long valve gap and run through described long valve gap and bottom and stretch into the valve rod in described valve body, it is characterized in that: on the described valve rod on described long valve gap top, upper sealing device is installed, the top of described valve rod is equipped with the valve rod slewing gear; The bottom of described valve rod is equipped with the ball valve core with described valve seat compression fit, and described ball valve core is provided with relief hole; Between the outer circumferential face of described valve seat and the inner peripheral surface of described valve body, lower sealing device is installed, described valve seat, away between the end face of described ball valve core and described valve body, pre-tightening apparatus being installed, circumferentially is equipped with draining board on the outer wall of described long valve gap.
2. ultra-low temperature ball valve as claimed in claim 1, is characterized in that: between described valve body and described long valve gap, be provided with middle flange gasket.
3. ultra-low temperature ball valve as claimed in claim 2, it is characterized in that: described middle flange gasket is stainless steel and Expanded graphite spiral wound gasket.
4. ultra-low temperature ball valve as claimed in claim 1, is characterized in that: between the bottom of described long valve gap and described valve rod, spring bearing is installed.
5. ultra-low temperature ball valve as claimed in claim 1, it is characterized in that: described pre-tightening apparatus comprises the pretension seat, between described pretension seat and described valve body, preloading spring is installed.
6. ultra-low temperature ball valve as claimed in claim 1, it is characterized in that: described lower sealing device comprises graphite-seal ring.
7. ultra-low temperature ball valve as claimed in claim 1, it is characterized in that: described upper sealing device comprises and is sleeved on described valve rod and filler cover that bottom is fixedly connected with the top of described long valve gap, be filled with stuffing box packing in described filler cover, described filler cover top is equipped with the Gland be fixedly connected with described filler cover.
8. ultra-low temperature ball valve as claimed in claim 7 is characterized in that: described stuffing box packing is the graphite packing of folder steel wire.
9. the described ultra-low temperature ball valve of claim as arbitrary as claim 1 to 8, it is characterized in that: described valve rod slewing gear comprises the handle be fixedly connected with described valve rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320426160.3U CN203374867U (en) | 2013-07-18 | 2013-07-18 | Ultra-low temperature ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320426160.3U CN203374867U (en) | 2013-07-18 | 2013-07-18 | Ultra-low temperature ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203374867U true CN203374867U (en) | 2014-01-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320426160.3U Expired - Fee Related CN203374867U (en) | 2013-07-18 | 2013-07-18 | Ultra-low temperature ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203374867U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989843A (en) * | 2015-07-22 | 2015-10-21 | 雷蒙德(北京)科技股份有限公司 | Ultralow-temperature metal hard seal floating ball valve |
| GB2620263A (en) * | 2022-05-31 | 2024-01-03 | Vinco Valvulas S A | Overpressure protection system on filling with gas or cryogenic liquid and mode of operation |
-
2013
- 2013-07-18 CN CN201320426160.3U patent/CN203374867U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989843A (en) * | 2015-07-22 | 2015-10-21 | 雷蒙德(北京)科技股份有限公司 | Ultralow-temperature metal hard seal floating ball valve |
| GB2620263A (en) * | 2022-05-31 | 2024-01-03 | Vinco Valvulas S A | Overpressure protection system on filling with gas or cryogenic liquid and mode of operation |
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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: 20140101 Termination date: 20150718 |
|
| EXPY | Termination of patent right or utility model |