CN105202206A - Low-temperature cutting-off flow-limiting valve - Google Patents
Low-temperature cutting-off flow-limiting valve Download PDFInfo
- Publication number
- CN105202206A CN105202206A CN201510753413.1A CN201510753413A CN105202206A CN 105202206 A CN105202206 A CN 105202206A CN 201510753413 A CN201510753413 A CN 201510753413A CN 105202206 A CN105202206 A CN 105202206A
- Authority
- CN
- China
- Prior art keywords
- valve
- flow
- valve body
- current limliting
- 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.)
- Granted
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Classifications
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- 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
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- 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
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- 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
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- 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 low-temperature cutting-off flow-limiting valve comprising a cutting-off valve body, a valve rod, a cutting-off valve clack, and a valve sleeve, wherein the cutting-off valve body comprises a liquid inlet and a liquid outlet; the valve rod and the cutting-off valve clack are arranged in the valve cavity of the cutting-off valve body; the valve sleeve is arranged between the valve rod and the cutting-off valve body; a flow-limiting valve body and a flow-limiting valve plate are arranged outside the cutting-off valve clack in a sleeving manner; the flow-limiting valve body is fixed in the valve cavity of the cutting-of valve body; the flow-limiting valve plate is positioned below the flow-limiting valve body; an elastic part is arranged between the flow-limiting valve body and the flow-limiting valve plate; when a pipeline is in a normal condition, the elastic part can enable the flow-limiting valve plate and the flow-limiting valve body to keep a gap to form a flow limiting channel capable of communicating the liquid inlet and the liquid outlet outside the cutting-off valve clack, when the pipeline leaks, the elastic part can enable the flow-limiting valve plate and the flow-limiting valve body to be fitted to further enable the flow limiting channel to be cut off. The low-temperature cutting-off flow-limiting valve has the advantages of being low in manufacturing cost, simple in structure, small in leaking point number and convenient to install.
Description
Technical field
The present invention relates to a kind of low temperature cut-off flow-limiting valve, belong to valve mechanism field.
Background technique
At present, along with industrial development, there is LNGV (liquefied natural gas vehicle), it arranges liquefied natural gas bottle on car body, there is provided rock gas as the energy to automobile, liquefied natural gas bottle is a kind of cryogenic liquide insulated gas cylinder, and the topping up of liquefied natural gas bottle, feed flow, safety relief and pressure regulation must be realized by various control valve.
In prior art, liquefied natural gas bottle manufacturer both domestic and external is all the adapter adopting crossover sub welding fluid stop valve on its fluid pipeline, disclosed in Chinese patent CN201310666109.4, a kind of balanced type cut-off non-return regulates multipurpose valve, after fluid stop valve, adopt thread forms to connect flow-limiting valve by Stainless Steel Tube again, the major defect that this Placement exists in actual use is that leakage point is many, manufacture and difficult in maintenance.Namely add manufacture cost and the assembling work amount of product, turn increase scyewed joint joint and length of pipe, as loosening appears in scyewed joint joint, rock gas will leak in a large number, also can there is the serious risk led to a disaster.
In order to solve the problem, design a kind of structure simple, low cost of manufacture, and the fluid low temperature cut-off flow-limiting valve that connecting joint is few, Safety performance is good becomes the research bright spot of related domain.
Summary of the invention
The present invention aims to provide a kind of low temperature cut-off flow-limiting valve, and this low temperature cut-off flow-limiting valve can meet the performance requirement of cryogenic insulated cylinder to fluid stop valve and flow-limiting valve, has again low cost of manufacture, structure is simple, 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 cut-off flow-limiting valve, comprises the checking-valve body with liquid entering hole and liquid outlet, is contained in the valve rod in checking-valve body valve pocket and cut-off flap, and is contained in the valve pocket between valve rod and checking-valve body; Its structural feature is, described cut-off flap overcoat is equipped with current limliting valve body and current limliting valve plate; Described current limliting valve body is fixed in the valve pocket of described checking-valve body, described current limliting valve plate is positioned at below current limliting valve body, and elastic member is provided with between current limliting valve body and current limliting valve plate, this elastic member makes current limliting valve plate and current limliting valve body keep spacing and form the restricted flow passage being communicated with described liquid entering hole and liquid outlet outward ending flap when pipeline is normal, this elastic member occurs when leaking, current limliting valve plate and flow-limiting valve being shown consideration for close at pipeline and makes described restricted flow passage keep cutting off.
According to embodiments of the invention, further optimization can also be done to the present invention, below for optimizing the rear technological scheme formed:
As a kind of concrete fixed form, described current limliting valve body has outside thread, has internal thread in the valve pocket of described checking-valve body, and described current limliting valve body is screwed onto in the valve pocket of this checking-valve body.
Preferably, current limliting valve pin is provided with between described current limliting valve plate and current limliting valve body.
Preferably, described elastic member is limited stray bullet spring.
Conveniently adjustable cut-off valve, described valve stem tip is equipped with handwheel, and the top of this handwheel has cavity, and this cavity, built with spring capping, is equipped with spring between spring capping and handwheel.
In order to ensure sealing effect, being provided with stuffing box packing between described valve rod and valve pocket, above stuffing box packing, being provided with Gland.
Red copper pad is provided with between described valve pocket and checking-valve body.
Above structure, the present invention according to cryogenic insulated cylinder to fluid stop valve, the requirement of flow-limiting valve, in conjunction with fluid stop valve, the design feature of flow-limiting valve, adopt low cost of manufacture, structure is simple, leakage point is few, principle easy for installation, to fluid stop valve, the component of flow-limiting valve redesign, fluid stop valve and flow-limiting valve is made to be arranged on a common valve body, eliminate the valve body of each valve, decrease leakage point, structure is compacter, make the cut-off flow-limiting valve designed meet cryogenic insulated cylinder to end fluid, the performance requirement of current limliting.
Compared with prior art, the invention has the beneficial effects as follows:
1) in this valve, two valves share a valve body, and eliminate independently valve body and connecting tube, cost reduces greatly;
2) eliminate the connecting tube between valve and valve, decrease leakage point, structure is compacter, and Security is more reliable;
3) it can be installed as the individual components of gas cylinder, detect and fast easy to maintenance.
Below in conjunction with drawings and Examples, the present invention is further elaborated.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of one embodiment of the invention;
Fig. 2 is the partial enlarged drawing of Fig. 1.
Embodiment
A kind of low temperature cut-off flow-limiting valve, as illustrated in fig. 1 and 2, form primarily of adapter 1, checking-valve body 2, flap sealing gasket 3, flap 4, red copper pad 5, valve rod 6, valve pocket 7, lower seal filler 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 current limliting valve plate 20.
The structure brief introduction of cut-off flow-limiting valve: shown in figure, valve rod 6, valve pocket 7, lower seal filler 8, upper gland packing 9, 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 and form stop valve operating component.Flap sealing gasket 3 to be contained on flap 4 groove and to compress, composition stop valve clack assembly.Current limliting valve body 17,4 current limliting valve pins 18,4 current limliting springs 19, current limliting valve plate 20 are assembled together by figure and form flow-limiting valve assembly.
Make current limliting valve plate 20 and current limliting valve body 17 keep spacing when pipeline is normal and flap 4 is outer forms the restricted flow passage 23 being communicated with described liquid entering hole 21 and liquid outlet 22 ending, this elastic member makes current limliting valve plate 20 and current limliting valve body 17 fit and make described restricted flow passage 23 keep cutting off when leakage appears in pipeline.
Adapter 1 is welded in the unthreaded hole of checking-valve body 2, first current limliting valve body 17 outside thread of flow-limiting valve assembly be connected with the internal thread of checking-valve body 2 and be in place, again stop valve clack assembly is arranged in checking-valve body 2 cylindrical cavity by flow-limiting valve assembly, red copper pad 5 is arranged on checking-valve body 2 cylindrical cavity step, is then connected with the internal thread of checking-valve body 2 by valve pocket 7 outside thread of stop valve operating component.
The implementation process of cut-off flow-limiting valve:
1, stop valve is opened: be rotated counterclockwise handwheel 16 with hand, handwheel 16 drives stop valve clack assembly under valve pocket 7 internal thread and the effect of flap 4 outside thread by valve rod 6, stop valve clack assembly moves up, make the flap sealing gasket 3 of stop valve clack assembly leave the sealing surface of checking-valve body 2, liquid is flowed out by the interior upper channel of 4 circular holes on the current limliting valve body 17 of the cylindrical cavity internal diameter of adapter 1, the internal channel of checking-valve body 2, current limliting valve plate 20 external diameter of flow-limiting valve assembly and checking-valve body 2, flow-limiting valve assembly, checking-valve body 2.
2, stop valve is closed: to turn clockwise handwheel 16 with hand, handwheel 16 drives stop valve clack assembly under valve pocket 7 internal thread and the effect of flap 4 outside thread by valve rod 6, fluid stop valve clack assembly moves down, make the flap sealing gasket 3 of stop valve clack assembly be adjacent to the sealing surface of checking-valve body 2, liquid cannot flow through the internal channel of checking-valve body 2.
3, the metering function of flow-limiting valve: when normally working, due to the effect of the element such as vaporizer, pressure regulator valve after cut-off flow-limiting valve, the outlet port of cut-off flow-limiting valve produces back pressure, make the current limliting valve plate 20 two ends pressure reduction of flow-limiting valve assembly less, the pressure of liquid cannot overcome spring force makes current limliting valve plate 20 move, thus the circular section that liquid is become by cavity wall in current limliting valve plate 20 outer end and checking-valve body 2 is flowed out.When ending the connecting pipeline after flow-limiting valve and occurring leaking, the outlet port of cut-off flow-limiting valve cannot produce back pressure, current limliting valve plate about the 20 two ends pressure reduction of flow-limiting valve assembly is larger, the pressure of liquid overcomes spring force makes current limliting valve plate 20 move to current limliting valve body 17, until current limliting valve plate 20 is fitted with the corresponding two sides of current limliting valve body 17, thus cut off the flowing of liquid.
The content that above-described embodiment is illustrated should be understood to these embodiments only for being illustrated more clearly in the present invention, and be not used in and limit the scope of the invention, after having read the present invention, the amendment of those skilled in the art to the various equivalent form of value of the present invention has all fallen into the application's claims limited range.
Claims (7)
1. a low temperature cut-off flow-limiting valve, comprise the checking-valve body (2) with liquid entering hole (21) and liquid outlet (22), be contained in the valve rod (5) in checking-valve body (2) valve pocket and cut-off flap (4), and be contained in the valve pocket (7) between valve rod (5) and checking-valve body (2), it is characterized in that, outside described cut-off flap (4), be set with flow-limiting valve body (17) and current limliting valve plate (20), described current limliting valve body (17) is fixed in the valve pocket of described checking-valve body (2), described current limliting valve plate (20) is positioned at current limliting valve body (17) below, and elastic member is provided with between current limliting valve body (17) and current limliting valve plate (20), this elastic member makes when pipeline is normal current limliting valve plate (20) and current limliting valve body (17) keep spacing and forms the restricted flow passage (23) being communicated with described liquid entering hole (21) and liquid outlet (22) outward ending flap (4), this elastic member occurs making current limliting valve plate (20) and current limliting valve body (17) fit when leaking at pipeline and makes described restricted flow passage (23) keep cutting off.
2. low temperature cut-off flow-limiting valve according to claim 1, it is characterized in that, described current limliting valve body (17) has outside thread, has internal thread in the valve pocket of described checking-valve body (2), and described current limliting valve body (17) is screwed onto in the valve pocket of this checking-valve body (2).
3. low temperature cut-off flow-limiting valve according to claim 1, is characterized in that, be provided with current limliting valve pin (18) between described current limliting valve plate (20) and current limliting valve body (17).
4. low temperature according to claim 1 cut-off flow-limiting valve, is characterized in that, described elastic member is limited stray bullet spring (19).
5. according to the low temperature cut-off flow-limiting valve one of claim 1-4 Suo Shu, it is characterized in that, handwheel (16) is equipped with on described valve rod (5) top, the top of this handwheel (16) has cavity, this cavity, built with spring capping (14), is equipped with spring (15) between spring capping (14) and handwheel (16).
6., according to the low temperature cut-off flow-limiting valve one of claim 1-4 Suo Shu, it is characterized in that, between described valve rod (5) and valve pocket (7), be provided with stuffing box packing, above stuffing box packing, be provided with Gland (10).
7., according to the low temperature cut-off flow-limiting valve one of claim 1-4 Suo Shu, it is characterized in that, between described valve pocket (7) and checking-valve body (2), be provided 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 true CN105202206A (en) | 2015-12-30 |
| CN105202206B 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) |
Cited By (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 (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030226603A1 (en) * | 2002-06-07 | 2003-12-11 | Thomas Edward Gajewski | Flow control valve |
| 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 |
| 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 (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030226603A1 (en) * | 2002-06-07 | 2003-12-11 | Thomas Edward Gajewski | Flow control valve |
| 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 |
| CN205090002U (en) * | 2015-11-04 | 2016-03-16 | 江南工业集团有限公司 | By restriction valve |
Cited By (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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105202206B (en) | 2018-05-11 |
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Granted publication date: 20180511 Termination date: 20181104 |