CN105202206B - Low temperature ends flow-limiting valve - Google Patents
Low temperature ends flow-limiting valve Download PDFInfo
- Publication number
- CN105202206B CN105202206B CN201510753413.1A CN201510753413A CN105202206B CN 105202206 B CN105202206 B CN 105202206B CN 201510753413 A CN201510753413 A CN 201510753413A CN 105202206 B CN105202206 B CN 105202206B
- Authority
- CN
- China
- Prior art keywords
- valve
- current limliting
- valve body
- flow
- limiting
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/52—Means for additional adjustment of the rate of flow
- F16K1/523—Means for additional adjustment of the rate of flow for limiting the maximum flow rate, using a stop
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
- F16K17/28—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only
- F16K17/30—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only spring-loaded
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a kind of low temperature to end flow-limiting valve.The low temperature cut-off flow-limiting valve includes the checking-valve body with inlet and liquid outlet, valve rod and cut-off flap in checking-valve body valve chamber, and the valve pocket between valve rod and checking-valve body；The cut-off flap overcoat is equipped with current limliting valve body and current limliting valve plate；The current limliting valve body is fixed in the valve chamber of the checking-valve body, the current limliting valve plate is located at below current limliting valve body, and elastomeric element is equipped between current limliting valve plate and current limliting valve plate, the elastomeric element makes current limliting valve plate keep spacing with current limliting valve body and form the restricted flow passage for connecting the inlet and liquid outlet outside cut-off flap when pipeline is normal, which makes current limliting valve plate be closed with flow-limiting valve consideration when pipeline leaks and make the restricted flow passage keep separating.The present invention has the advantages that manufacture cost is low, simple in structure, leakage point is few, easy for installation.
Description
Technical field
The present invention relates to a kind of low temperature to end flow-limiting valve, belongs to valve mechanism field.
Background technology
At present, as industry continues to develop, there is LNG car, it sets liquefied natural gas gas on car body
Bottle, provides natural gas as the energy, liquefied natural gas bottle is a kind of cryogenic liquid insulated gas cylinder, liquefied natural gas gas to automobile
Filling liquid, feed flow, safety relief and the pressure regulation of bottle must be realized by various control valves.
In the prior art, liquefied natural gas bottle manufacturer both domestic and external on its outlet tube road is connect using conversion
Head welds out the adapter of liquid shut-off valve, and a kind of balanced type cut-off non-return is adjusted as disclosed in Chinese patent CN201310666109.4
Multipurpose valve, connects flow-limiting valve, this connection mode exists by stainless steel tube using thread forms again going out behind liquid shut-off valve
Existing major defect is that leakage point is more in actual use, is manufactured and difficult in maintenance.Add the manufacture cost of product
With assembly work amount, and thread connection connector and length of pipe are added, as thread connection joint loosens, natural gas will
It can largely leak, can also there is the serious risk to lead to a disaster.
To solve the above-mentioned problems, it is simple in structure to design one kind, manufacture cost is low, and connecting joint is few, security
The liquid low temperature cut-off flow-limiting valve that goes out that can be good becomes the research bright spot of this area.
The content of the invention
The present invention is intended to provide a kind of low temperature cut-off flow-limiting valve, low temperature cut-off flow-limiting valve can meet cryogenic insulated cylinder
Performance requirement to going out liquid shut-off valve and flow-limiting valve, and with manufacture cost is low, simple in structure, leakage point is few, easy for installation
Advantage.
To achieve these goals, the technical solution adopted in the present invention is：
A kind of low temperature ends flow-limiting valve, including the checking-valve body with inlet and liquid outlet, mounted in checking-valve body valve chamber
Interior valve rod and cut-off flap, and the valve pocket between valve rod and checking-valve body；It is structurally characterized in that, the cut-off flap
It is set with flow-limiting valve body and current limliting valve plate outside；The current limliting valve body is fixed in the valve chamber of the checking-valve body, the flow-limiting valve
Plate is located at below current limliting valve body, and elastomeric element is equipped between current limliting valve body and current limliting valve plate, the elastomeric element in pipeline just
Current limliting valve plate is set to keep spacing with current limliting valve body and form the limit for connecting the inlet and liquid outlet outside cut-off flap when often
Circulation road, the elastomeric element make current limliting valve plate show consideration for conjunction with flow-limiting valve when pipeline leaks and keep the restricted flow passage
Partition.
According to an embodiment of the invention, further optimization can also be made to the present invention, below the skill to be formed after optimization
Art scheme：
As a kind of specific fixed form, the current limliting valve body has external screw thread, has in the valve chamber of the checking-valve body
There is internal thread, the current limliting valve body is screwed onto in the valve chamber of the checking-valve body.
Preferably, current limliting valve pin is equipped between the current limliting valve plate and current limliting valve body.
Preferably, the elastomeric element is limited stray bullet spring.
In order to facilitate adjustable cut-off valve, the valve stem tip is equipped with handwheel, cavity is provided with the top of the handwheel, in the cavity
Equipped with spring capping, spring is housed between spring capping and handwheel.
In order to ensure sealing effect, airtight and watertight padding is equipped between the valve rod and valve pocket, is equipped with and fills out above airtight and watertight padding
Expect gland.
Red copper pad is equipped between the valve pocket and checking-valve body.
By said structure, the present invention according to cryogenic insulated cylinder to going out the requirement of liquid shut-off valve, flow-limiting valve, with reference to going out liquid
The design feature of shut-off valve, flow-limiting valve, using the principle that manufacture cost is low, simple in structure, leakage point is few, easy for installation, to going out
Liquid shut-off valve, the parts of flow-limiting valve are redesigned, and use liquid shut-off valve and flow-limiting valve is installed on a common valve body,
The valve body of each valve is eliminated, reduces leakage point, structure is compacter, and the cut-off flow-limiting valve for making to design meets low temperature
Insulated gas cylinder ends to going out liquid, the performance requirement of current limliting.
Compared with prior art, the beneficial effects of the invention are as follows：
1）Two valves share a valve body in the valve, eliminate independent valve body and connecting pipe, and cost substantially reduces；
2）The connecting pipe between valve and valve is eliminated, reduces leakage point, structure is compacter, and security is more
Reliably；
3）It can be installed as the individual components of gas cylinder, be detected and easy to maintenance quick.
Below in conjunction with drawings and examples, the present invention is further elaborated.
Brief description of the drawings
Fig. 1 is the structure principle chart of one embodiment of the invention；
Fig. 2 is the partial enlarged view of Fig. 1.
Embodiment
A kind of low temperature ends flow-limiting valve, as illustrated in fig. 1 and 2, mainly by adapter 1, checking-valve body 2, flap gasket 3, valve
Valve 4, red copper pad 5, valve rod 6, valve pocket 7, lower airtight and watertight padding 8, upper gland packing 9, gland 10, anti-wear gasket 11, marking plate 12,
Self-locking nut 13, spring capping 14, spring 15, handwheel 16, current limliting valve body 17, current limliting valve pin 18, current limliting spring 19 and flow-limiting valve
Plate 20 forms.
End the structure brief introduction of flow-limiting valve：As shown in figure, valve rod 6, valve pocket 7, lower airtight and watertight padding 8, upper gland packing 9, fill out
Material gland 10, anti-wear gasket 11, marking plate 12, self-locking nut 13, spring capping 14, spring 15 and handwheel 16 are assembled together by figure
Form shut-off valve operating assembly.Flap gasket 3 is on 4 groove of flap and compresses, and forms stop valve clack component.Flow-limiting valve
The current limliting valve pin 18,4 of body 17,4 current limliting spring 19, current limliting valve plate 20 are assembled together by figure forms current limliting valve module.
Current limliting valve plate 20 is set to keep spacing with current limliting valve body 17 and be formed outside cut-off flap 4 and connect institute when pipeline is normal
The restricted flow passage 23 of inlet 21 and liquid outlet 22 is stated, which makes current limliting valve plate 20 and current limliting when pipeline leaks
Valve body 17 is bonded and the restricted flow passage 23 is kept partition.
Adapter 1 is welded in the unthreaded hole of checking-valve body 2, first by 17 external screw thread of current limliting valve body and shut-off valve of current limliting valve module
The internal thread of body 2 is connected and is installed in place, then stop valve clack component is installed on 2 cylinder of checking-valve body by current limliting valve module
In shape cavity, red copper pad 5 is installed on 2 cylindrical cavity step of checking-valve body, then by outside the valve pocket 7 of shut-off valve operating assembly
Screw thread is connected with the internal thread of checking-valve body 2.
End the implementation process of flow-limiting valve：
1st, shut-off valve is opened：With hand rotation hand wheel 16 counterclockwise, handwheel 16 drives stop valve clack component to exist by valve rod 6
Under 7 internal thread of valve pocket is acted on 4 external screw thread of flap, stop valve clack component moves up, and makes the flap of stop valve clack component
Gasket 3 leaves the sealing surface of checking-valve body 2, liquid by adapter 1, the internal channel of checking-valve body 2, current limliting valve module current limliting
20 outside diameter of valve plate and 4 circular holes on the cylindrical cavity internal diameter of checking-valve body 2, the current limliting valve body 17 of current limliting valve module, cut-off
The interior upper channel outflow of valve body 2.
2nd, shut-off valve is closed：Handwheel 16 is rotated clockwise with hand, handwheel 16 drives stop valve clack component to exist by valve rod 6
7 internal thread of valve pocket is with the effect of 4 external screw thread of flap, going out liquid stop valve clack component and moving down, make stop valve clack component
Flap gasket 3 is adjacent to the sealing surface of checking-valve body 2, and liquid cannot flow through the internal channel of checking-valve body 2.
3rd, the metering function of flow-limiting valve：In normal work, due to elements such as the vaporizer after cut-off flow-limiting valve, pressure regulator valves
Effect, end flow-limiting valve exit produce back pressure, make the 20 both ends pressure difference of current limliting valve plate of current limliting valve module smaller, liquid
Pressure can not overcome spring force to move current limliting valve plate 20, so that liquid passes through 20 outer end of current limliting valve plate and 2 inner cavity of checking-valve body
The circular section outflow that inner wall becomes.When the connecting line after ending flow-limiting valve leaks, end the exit of flow-limiting valve without
Method produces back pressure, and the 20 upper and lower ends pressure difference of current limliting valve plate of current limliting valve module is larger, and the pressure of liquid overcomes spring force to make current limliting
Valve plate 20 is moved to current limliting valve body 17, until current limliting valve plate 20 and the corresponding two sides fitting of current limliting valve body 17, so as to cut off liquid
Flowing.
The content that above-described embodiment illustrates should be understood to that these embodiments are only used for being illustrated more clearly that the present invention, without
For limiting the scope of the invention, after the present invention has been read, various equivalent forms of the those skilled in the art to the present invention
Modification each fall within the application appended claims limited range.
Claims (7)
1. a kind of low temperature ends flow-limiting valve, including with inlet（21）And liquid outlet（22）Checking-valve body（2）, mounted in cut-off
Valve body（2）Valve rod in valve chamber（5）With cut-off flap（4）, and mounted in valve rod（5）With checking-valve body（2）Between valve pocket
（7）；It is characterized in that, the cut-off flap（4）It is set with flow-limiting valve body outside（17）With current limliting valve plate（20）；The current limliting valve body
（17）It is fixed on the checking-valve body（2）Valve chamber in, the current limliting valve plate（20）Positioned at current limliting valve body（17）Lower section, and limiting
Flow valve body（17）With current limliting valve plate（20）Between be equipped with elastomeric element, which makes current limliting valve plate when pipeline is normal（20）
With current limliting valve body（17）Keep spacing and end flap（4）Outer formed connects the inlet（21）And liquid outlet（22）Limit
Circulation road（23）, which makes current limliting valve plate when pipeline leaks（20）With current limliting valve body（17）It is bonded and makes described
Restricted flow passage（23）Keep partition.
2. low temperature according to claim 1 ends flow-limiting valve, it is characterised in that the current limliting valve body（17）With outer spiral shell
Line, the checking-valve body（2）Valve chamber in there is internal thread, the current limliting valve body（17）It is screwed onto the checking-valve body（2）Valve
Intracavitary.
3. low temperature according to claim 1 ends flow-limiting valve, it is characterised in that the current limliting valve plate（20）With current limliting valve body
（17）Between be equipped with current limliting valve pin（18）.
4. low temperature according to claim 1 ends flow-limiting valve, it is characterised in that the elastomeric element is limited stray bullet spring
（19）.
5. the low temperature cut-off flow-limiting valve according to one of claim 1-4, it is characterised in that the valve rod（5）Top is equipped with
Handwheel（16）, the handwheel（16）Top be provided with cavity, spring capping is housed in the cavity（14）, in spring capping（14）With hand
Wheel（16）Between spring is housed（15）.
6. the low temperature cut-off flow-limiting valve according to one of claim 1-4, it is characterised in that the valve rod（5）With valve pocket（7）
Between be equipped with airtight and watertight padding, gland is equipped with above airtight and watertight padding（10）.
7. the low temperature cut-off flow-limiting valve according to one of claim 1-4, it is characterised in that the valve pocket（7）With shut-off valve
Body（2）Between be equipped with red copper pad（5）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510753413.1A CN105202206B (en) | 2015-11-04 | 2015-11-04 | Low temperature ends flow-limiting valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510753413.1A CN105202206B (en) | 2015-11-04 | 2015-11-04 | Low temperature ends flow-limiting valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105202206A CN105202206A (en) | 2015-12-30 |
| CN105202206B true CN105202206B (en) | 2018-05-11 |
Family
ID=54950049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510753413.1A Expired - Fee Related CN105202206B (en) | 2015-11-04 | 2015-11-04 | Low temperature ends flow-limiting valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105202206B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107524840A (en) * | 2017-09-28 | 2017-12-29 | 江苏威尔迪威阀业有限公司 | A kind of Novel regulating valve |
| CN108397552A (en) * | 2018-04-27 | 2018-08-14 | 张家港富瑞阀门有限公司 | A kind of ultralow temperature cut-off excess flow valve |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200982423Y (en) * | 2006-11-09 | 2007-11-28 | 上海气体阀门总厂 | Compressed natural gas check valve for vehicle use |
| CN102777646A (en) * | 2012-07-17 | 2012-11-14 | 扬州市安宜阀门有限公司 | Vehicular compressed natural gas bottle flow-limiting valve |
| CN203363217U (en) * | 2013-07-03 | 2013-12-25 | 施瑞德阀门(厦门)有限公司 | Natural gas soft seal stop valve |
| CN104847938A (en) * | 2015-05-18 | 2015-08-19 | 苏州赛智达智能科技有限公司 | Low temperature overflowing flow-limiting valve for liquefied natural gas bottles |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6745794B2 (en) * | 2002-06-07 | 2004-06-08 | Praxair Technology, Inc. | Flow control valve |
| CN205090002U (en) * | 2015-11-04 | 2016-03-16 | 江南工业集团有限公司 | By restriction valve |
-
2015
- 2015-11-04 CN CN201510753413.1A patent/CN105202206B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200982423Y (en) * | 2006-11-09 | 2007-11-28 | 上海气体阀门总厂 | Compressed natural gas check valve for vehicle use |
| CN102777646A (en) * | 2012-07-17 | 2012-11-14 | 扬州市安宜阀门有限公司 | Vehicular compressed natural gas bottle flow-limiting valve |
| CN203363217U (en) * | 2013-07-03 | 2013-12-25 | 施瑞德阀门(厦门)有限公司 | Natural gas soft seal stop valve |
| CN104847938A (en) * | 2015-05-18 | 2015-08-19 | 苏州赛智达智能科技有限公司 | Low temperature overflowing flow-limiting valve for liquefied natural gas bottles |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105202206A (en) | 2015-12-30 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20180511 Termination date: 20181104 |