CN2878818Y - Cut-off valve for rising stem - Google Patents
Cut-off valve for rising stem Download PDFInfo
- Publication number
- CN2878818Y CN2878818Y CN 200620033788 CN200620033788U CN2878818Y CN 2878818 Y CN2878818 Y CN 2878818Y CN 200620033788 CN200620033788 CN 200620033788 CN 200620033788 U CN200620033788 U CN 200620033788U CN 2878818 Y CN2878818 Y CN 2878818Y
- Authority
- CN
- China
- Prior art keywords
- valve
- rod
- valve body
- stuffing box
- rising stem
- 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 - Fee Related
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- Mechanically-Actuated Valves (AREA)
Abstract
The utility model provides a stop valve with visible rod, which comprises a valve body, a valve cover connected with the valve body, and a stuffing box on the upper side of the valve cover. The valve rod in turn goes through the stuffing box and the valve cover into the valve body and is connected with the valve body. It is characterized that a transmission auxiliary protection sleeve is provided on the other end of the valve rod and is connected with the stuffing box by connecting pieces; and in the transmission auxiliary protection sleeve, an inner screw thread and an outer screw thread matched with each other are provided at the position corresponding to the valve rod. The utility model combines most of the advantages of both stop valves with visible rod and with invisible rod, and can be used in any environment and in any medium.
Description
Technical field:
The utility model is relevant with valve, and is special relevant with improved rising stem (RS.) stop valve.
Background technique:
Stop valve is a kind of important valve in modern industry production, life.Traditional classification by stop valve can be divided into rising stem (RS.) stop valve and rising stem stop valve.Two kinds of valve use occasions and medium characteristics are had nothing in common with each other, and have salient feature separately:
The rising stem (RS.) stop valve is defined as, and threaded stem is at the stop valve of housing outside; Its advantage is: the complete and medium disengaging of screw thread drive part, the static that its friction is produced, metal fillings etc. can not produce any adverse effect to media security and cleaning, and can add grease-filling lubricating oil helps lubricated, this valve is very outstanding to the applicability of inflammable and explosive medium, such as the LNG medium.But its shortcoming also exists simultaneously with advantage; Because of the motion thread pair is exposed to the outside, be subjected to the corrosion of surrounding environment Korrosionsmedium easily, the motion thread pair is damaged; The easy included increase friction of dust or foreign matter is stuck the keying of the valve difficulty that becomes even in dirty environment.Its performance and life-span all can be subjected to great influence under this environment.Therefore less use under many dirt or the rugged environment.
Rising stem stop valve is defined as: the stop valve of threaded stem in housing.Its advantage is: because of the motion thread pair in enclosure interior, its driving mechanism can not be subjected to the influence of any foeign element, only can wear and tear because of friction own.But its shortcoming also is clearly; Directly contact with medium because of motion thread is secondary, static that gearing friction produced even spark can make inflammable and explosive medium directly burning or blast, cause a serious accident; Friction can produce wearing and tearing, and the abrasive dust of metal can directly be sneaked in the medium, and the cleaning of medium or purity are suffered damage.Therefore in hazardous goods such as inflammables and explosives, seldom use rising stem stop valve.
Very distinct because of two kinds of pluses and minuses that stop valve is had separately, applicable limitation separately is also very clear in actual applications, often can not take into account or use ideally.
The model utility content:
The purpose of this utility model is in order to overcome above deficiency, a kind of most of advantage that can merge rising stem (RS.) and rising stem stop valve to be provided, can being used for the rising stem (RS.) stop valve of any environment and any medium operating mode.
The purpose of this utility model is achieved in that
The utility model is the improvement on the basis of existing rising stem (RS.) stop valve; comprise valve body; the valve gap that is connected with valve body; be positioned at the stuffing box of the band filler of valve gap upper end; valve rod one end passes stuffing box successively, valve gap stretches in the valve body and is connected with valve body; it is characterized in that having and be through on the valve rod the other end and, in the transmission protecting jacket with on the valve rod opposite position, the internal thread and the outside thread of working in coordination arranged respectively by the transmission protecting jacket that link is connected with stuffing box.
The utility model filler contacts with medium with the bottom inner chamber, the motion thread pair externally, motion thread is secondary to be separated with medium, avoided because of harm and the pollution of the fricative spark of transmission screw thread or metal fillings medium, great advantage with existing rising stem (RS.) stop valve is so can be with inflammable and explosive danger medium; Meanwhile, the utility model has adopted the transmission protecting jacket, and the motion thread pair that is positioned at protecting jacket has been subjected to protection, makes it can not have the advantage of existing rising stem stop valve because of the abominable of environment reduces its usability and life-span.The utility model can be used for any environment and any medium operating mode, and economical with materials.
Description of drawings:
Fig. 1 is the utility model structural representation.
Fig. 2 is the middle A portion enlarged view of Fig. 1.
Embodiment:
Referring to Fig. 1, Fig. 2, valve gap 1 is connected with valve body 2 by bolt.Stuffing box 3 is contained in the top of valve gap.Filler 4, filler precompression spring 5 are housed in the stuffing box.Valve rod 10 lower ends are passed stuffing box, valve gap successively and are stretched in the valve body and are connected with valve body.Valve rod upper end has outside thread 6 and screw thread to pass the internal threads 8 that cooperate with outside thread 6 in the transmission protecting jacket 7 and stretches out on the transmission protecting jacket outer end and refill handwheel 9.Transmission protecting jacket bottom is connected with stuffing box by bolt.Internal thread 8 in the transmission protecting jacket has formed the screw thread transmission with the outside thread 6 on the valve rod.
Claims (1)
1, rising stem (RS.) stop valve; comprise valve body; the valve gap that is connected with valve body; be positioned at the stuffing box of the band filler of valve gap upper end; valve rod one end passes stuffing box successively, valve gap stretches in the valve body and is connected with valve body; it is characterized in that having and be through on the valve rod the other end and, in the transmission protecting jacket with on the valve rod opposite position, the internal thread and the outside thread of working in coordination arranged respectively by the transmission protecting jacket that link is connected with stuffing box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620033788 CN2878818Y (en) | 2006-04-12 | 2006-04-12 | Cut-off valve for rising stem |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620033788 CN2878818Y (en) | 2006-04-12 | 2006-04-12 | Cut-off valve for rising stem |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2878818Y true CN2878818Y (en) | 2007-03-14 |
Family
ID=37861233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620033788 Expired - Fee Related CN2878818Y (en) | 2006-04-12 | 2006-04-12 | Cut-off valve for rising stem |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2878818Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102878304A (en) * | 2012-09-26 | 2013-01-16 | 成都欣国立低温科技有限公司 | Fluid medium stop valve |
-
2006
- 2006-04-12 CN CN 200620033788 patent/CN2878818Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102878304A (en) * | 2012-09-26 | 2013-01-16 | 成都欣国立低温科技有限公司 | Fluid medium stop valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070314 |