CN204592359U - Bellows parallel gate valve - Google Patents
Bellows parallel gate valve Download PDFInfo
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- CN204592359U CN204592359U CN201520197731.XU CN201520197731U CN204592359U CN 204592359 U CN204592359 U CN 204592359U CN 201520197731 U CN201520197731 U CN 201520197731U CN 204592359 U CN204592359 U CN 204592359U
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- valve
- bellows
- flashboard
- parallel gate
- gate valve
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Abstract
The utility model relates to a kind of bellows parallel gate valve.Existing market to exist and what generally apply is all bellows wedge action valve and bellows stop valve, there is sealing difference, the defect that the life-span is short.The utility model comprises valve body, valve gap, in valve body, valve rod is set, the outside of valve rod is nested with bellows, the bottom of valve rod arranges spool, it is characterized in that arranging runner in described spool, runner is arranged two flashboards be parallel to each other, arrange elastic component between two flashboards, described flashboard is fixed on valve seat.Bellows structure and parallel gate valve combine by the utility model, can reach the performance requirement of zero leakage, turn avoid the shortcoming of stop valve and wedge action valve, and sealing is stronger, also has longer working life.
Description
Technical field
The present invention relates to a kind of bellows parallel gate valve.
Background technique
Along with the develop rapidly of science and technology and the develop rapidly of industrial level, sealing and the reliability requirement of valve are higher, seal failure not only can cause huge economic loss, and pollute the environment, even lead to great personnel casualty accidents, therefore the research of particular service requirement lower valve sealing technique is used and be significant.With the valve of bellows as valve stem seal element, it is usually used in the strict occasion of valve stem seal requirement, as in the occasion of high vacuum and nuclear industry or inflammable, explosive, poisonous, permeability have by force on the industrial pipeline under the special medias such as nuclear radiation and bad working environments.Because stop valve structure is simple, stroke is short, and switching time is short, and during switch, the frictional force of sealing surface is little.Existing market to exist and what generally apply is all bellows wedge action valve and bellows stop valve.
As shown in Figure 1, bellows stop valve comprises valve seat c and spool b, and runner a is S-shaped, and flow resistance is large, because valve rod is subject to the pressure of medium, easily bends, and operates moment of torsion also larger during switch.And also there is dismounting inconvenience, interchangeablity is poor, the problem that the life-span is shorter.
Be illustrated in figure 2 bellows wedge action valve, there is following problem: 1. due to flashboard e and valve seat d angle inconsistent, easily cause reveal, also can cause the problem that throttle down is comparatively required great effort.
2., and after bellows wedge action valve is heated and cools, wedge shape flashboard is often stuck, due to the defect of design, valve rod is moving up and down all limited, and when media expansion and contraction time, valve rod can deform and distortion.
3., although bellows wedge action valve uses " flexibility " material manufacture wedge shape flashboard but be also difficult to accomplish real " flexibility ", so-called " flexibility " flashboard often seems very firm.
4. bellows wedge action valve is owing to there being a gradient, when wedge shape flashboard slips over valve seat, does not have the effect of " cleaning ", dirt can be embedded fitting surface on the contrary.
Summary of the invention
The present invention is directed to the problems referred to above, a kind of bellows parallel gate valve is provided, bellows structure and parallel gate valve are combined, the performance requirement of zero leakage can be reached, turn avoid the shortcoming of stop valve and wedge action valve, sealing is stronger, also has longer working life.
For this reason, the present invention takes following technological scheme, bellows parallel gate valve, comprises valve body, valve gap, arranges valve rod in valve body, the outside of valve rod is nested with bellows, the bottom of valve rod arranges spool, it is characterized in that arranging runner in described spool, runner is arranged two flashboards be parallel to each other, arrange elastic component between two flashboards, described flashboard is fixed on valve seat.
Described runner is horizontal run, and described flashboard is vertical with horizontal run.
Described valve rod is arranged on flashboard top.
Filler is filled between described bellows upper end and valve rod.
Described flashboard leans on valve seat.
Described elastic component is upper and lower two Returnning springs be arranged in parallel.
Advantage of the present invention is as follows:
1. bellows parallel gate valve is all straight-through type, and flow resistance is little, and bellows parallel gate valve flashboard and MEDIA FLOW are to vertical, and valve rod does not stress.
2. bellows parallel gate valve flashboard when cutting out is subject to pressure medium, withstands on valve seat, makes sealing effect better, leaks in not easily occurring
3. easy accessibility, component interchangeability is strong, is convenient to on-line maintenance, has longer working life.
4. throttle down is comparatively laborsaving, reduces actuating motor power.
5. the valve rod of bellows parallel gate valve all can not be restricted at upper and lower two ends, and when the temperature of medium changes, flashboard can servo-actuatedly adjust, and flashboard and valve rod can not be stuck.
6. between bellows parallel gate valve two panels flashboard with two springs, can the bringing very large " flexibility " of flashboard be given.When size is very large, pressure change also very greatly time,
7. when bellows parallel gate valve flashboard slips over valve seat time, can produce the action of " cleaning ", this contributes to removing the dirt on fitting surface.
Accompanying drawing explanation
Fig. 1 is the structural representation of bellows stop valve.
Fig. 2 is the structural representation of bellows wedge action valve.
Fig. 3 is structural representation of the present invention.
Embodiment
Below in conjunction with specific embodiment, set forth the present invention further.
Bellows parallel gate valve as shown in Figure 3, comprise valve body 3, valve gap, valve rod 2 is set in valve body 3, the outside of valve rod 2 is nested with bellows 1, and the bottom of valve rod 2 arranges spool, arranges horizontal run in spool, runner is arranged two import flashboards be parallel to each other 6 and outlet flashboard 7, two flashboards are vertical with horizontal run, and arrange two parallel Returnning springs 4 between two flashboards, flashboard leans on valve seat 5.The lower end of valve rod 2 is arranged on flashboard, fills filler between the upper end of bellows 1 and valve rod 2 top.
The present invention has the following advantages compared to bellows stop valve:
1. bellows parallel gate valve is all straight-through type, and flow resistance is little, and bellows stop valve runner is S-shaped, and flow resistance is large.
2. bellows parallel gate valve flashboard and MEDIA FLOW are to vertical, and valve rod does not stress, and bellows stop valve is subject to the pressure of medium due to valve rod, easily bends, and operate moment of torsion also much larger than bellows gate valve during switch
3. bellows parallel gate valve flashboard when cutting out is subject to pressure medium, withstands on valve seat, makes sealing effect better, leaks in not easily occurring
4. bellows parallel gate valve easy accessibility, component interchangeability is strong, is convenient to on-line maintenance.The interchangeablity of bellows stop valve is poor.
5., because its convertibility is better, comparatively bellows stop valve is longer working life for bellows parallel gate valve.
The present invention has the following advantages compared to bellows wedge action valve:
1. bellows parallel gate valve is double-flashboard parallel gate valve, only needs to keep the parallelism of flashboard, just can ensure good sealing effect, and bellows wedge action valve, flashboard and angle of valve seat inconsistent, easily cause leakage.
2. the closedown of bellows parallel gate valve only relies on the position between flashboard and valve seat, does not need very large power to carry out throttle down.Therefore, relative to bellows wedge action valve, bellows parallel gate valve can join much smaller electric actuator.
3. the valve rod of bellows parallel gate valve all can not be restricted at upper and lower two ends, and when the temperature of medium changes, flashboard can servo-actuatedly adjust, and flashboard and valve rod can not be stuck.And after bellows wedge action valve is heated and cools, wedge shape flashboard is often stuck, due to the defect of design, valve rod is moving up and down all limited, and when media expansion and contraction time, valve rod can deform and distortion.
4. between bellows parallel gate valve two panels flashboard with two springs, can the bringing very large " flexibility " of flashboard be given.When size is very large, pressure change also very greatly time, even if bellows wedge action valve uses " flexibility " material manufacture wedge shape, flashboard is also difficult to accomplish real " flexibility ", and so-called " flexibility " flashboard often seems very firm.
5. when bellows parallel gate valve flashboard slips over valve seat time, can produce the action of " cleaning ", this contributes to removing the dirt on fitting surface.And the valve seat firmly sealed with officials Tai Li and flashboard are not easy wearing and tearing.And bellows wedge action valve is owing to there being a gradient, when wedge shape flashboard slips over valve seat, there is no the effect of " cleaning ", dirt can be embedded fitting surface on the contrary.
Bellows structure and parallel gate valve combine by the present invention, can reach the performance requirement of zero leakage, turn avoid the shortcoming of stop valve and wedge action valve, and sealing is stronger, also has longer working life.
Should be understood that these embodiments are only not used in for illustration of the present invention to limit the scope of the invention.In addition should be understood that those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within the application's appended claims limited range equally after the content of having read the present invention's instruction.
Claims (6)
1. bellows parallel gate valve, comprise valve body, valve gap, in valve body, valve rod is set, the outside of valve rod is nested with bellows, the bottom of valve rod arranges spool, it is characterized in that arranging runner in described spool, runner is arranged two flashboards be parallel to each other, arrange elastic component between two flashboards, described flashboard is fixed on valve seat.
2. bellows parallel gate valve according to claim 1, it is characterized in that described runner is horizontal run, described flashboard is vertical with horizontal run.
3. bellows parallel gate valve according to claim 2, is characterized in that described valve rod is arranged on flashboard top.
4. bellows parallel gate valve according to claim 3, is characterized in that filling filler between described bellows upper end and valve rod.
5. bellows parallel gate valve according to claim 4, is characterized in that described flashboard leans on valve seat.
6. bellows parallel gate valve according to claim 1, is characterized in that described elastic component is upper and lower two Returnning springs be arranged in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520197731.XU CN204592359U (en) | 2015-04-03 | 2015-04-03 | Bellows parallel gate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520197731.XU CN204592359U (en) | 2015-04-03 | 2015-04-03 | Bellows parallel gate valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204592359U true CN204592359U (en) | 2015-08-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520197731.XU Expired - Fee Related CN204592359U (en) | 2015-04-03 | 2015-04-03 | Bellows parallel gate valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN204592359U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104776240A (en) * | 2015-04-03 | 2015-07-15 | 哈托利海托阀门（杭州）有限公司 | Bellows parallel gate valve |
-
2015
- 2015-04-03 CN CN201520197731.XU patent/CN204592359U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104776240A (en) * | 2015-04-03 | 2015-07-15 | 哈托利海托阀门（杭州）有限公司 | Bellows parallel gate valve |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150826 Termination date: 20190403 |