CN105221771A - A kind of low temperature cut-off flow-limiting valve - Google Patents
A kind of low temperature cut-off flow-limiting valve Download PDFInfo
- Publication number
- CN105221771A CN105221771A CN201510715795.9A CN201510715795A CN105221771A CN 105221771 A CN105221771 A CN 105221771A CN 201510715795 A CN201510715795 A CN 201510715795A CN 105221771 A CN105221771 A CN 105221771A
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- China
- Prior art keywords
- valve
- current limliting
- flow
- liquid outlet
- flap
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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
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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)
- Lift Valve (AREA)
Abstract
The invention discloses a kind of low temperature cut-off flow-limiting valve.Described low temperature cut-off flow-limiting valve comprises the valve body with liquid entering hole and liquid outlet, be contained in valve rod on valve body with for the cut-off flap keeping liquid entering hole to be communicated with liquid outlet or to cut off, and be contained in the valve pocket on valve rod; Current limliting valve gap is equipped with at described valve body liquid outlet place, between this current limliting valve gap and valve body liquid outlet, be provided with current limliting flap; Described current limliting valve gap has liquid outlet channel, and the head of described current limliting flap is provided with inlet opening and liquid outlet opening, forms liquid passage between the inwall of the head outer wall of this current limliting flap and the inwall of valve body liquid outlet, current limliting valve gap; The afterbody of described current limliting flap has hollow channel; When pipeline is normal, described inlet opening, excessively liquid passage, liquid outlet opening are communicated with successively and flow-limiting valve are often opened, and when pipeline leakage, inlet opening, excessively liquid passage are not communicated with liquid outlet opening and flow-limiting valve is closed.The present invention has low cost of manufacture, structure is simple, leakage point is few, easy for installation advantage.
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 valve body with liquid entering hole and liquid outlet, be contained in valve rod on valve body with for the cut-off flap keeping liquid entering hole to be communicated with liquid outlet or to cut off, and be contained in the valve pocket on valve rod; Its structural feature is, current limliting valve gap is equipped with at described valve body liquid outlet place, between this current limliting valve gap and valve body liquid outlet, be provided with current limliting flap; Described current limliting valve gap has liquid outlet channel, and the head of described current limliting flap is provided with inlet opening and liquid outlet opening, forms liquid passage between the inwall of the head outer wall of this current limliting flap and the inwall of valve body liquid outlet, current limliting valve gap; The afterbody of described current limliting flap has hollow channel; When pipeline is normal, the liquid outlet of described valve body, inlet opening, excessively liquid passage, liquid outlet opening, hollow channel is communicated with successively with liquid outlet channel and flow-limiting valve is often opened, and when pipeline leakage, inlet opening, excessively liquid passage are not communicated with liquid outlet opening and flow-limiting valve is closed; The elastic limit stream unit keeping inlet opening, excessively liquid passage, liquid outlet opening and hollow channel often to open is provided with between the afterbody and the afterbody of current limliting valve gap of current limliting flap.
According to embodiments of the invention, further optimization can also be done to the present invention, below for optimizing the rear technological scheme formed:
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.
Preferably, described elastic limit stream unit is the current limliting spring be arranged between the afterbody of current limliting flap and the afterbody of current limliting valve gap.
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.
In order to ensure sealing effect, the joint of described current limliting flap and valve body is provided with current limliting sealing gasket.
In order to ensure sealing effect, the bottom of described cut-off flap is provided with groove, is pressed with flap sealing gasket in this groove.
Preferably, the tail end of described current limliting valve gap is fixed together by flow-limiting valve nut and a flow-limiting valve spherojoint.
Preferably, throttling pin is equipped with described current limliting flap.
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 the common valve body of a porous, eliminate the valve body of each valve, decrease leakage point, structure is compacter, make the fluid low temperature 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 shown in Figure 1, form primarily of adapter 1, valve body 2, flap sealing gasket 3, cut-off flap 4, valve rod 5, red copper pad 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 gap 17, current limliting sealing gasket 18, current limliting flap 19, throttling pin 20, current limliting spring 21, flow-limiting valve nut 22 and flow-limiting valve spherojoint 23.
As shown in Figure 2, described current limliting valve gap 17 has liquid outlet channel 28, the head of described current limliting flap 19 is provided with inlet opening 24 and liquid outlet opening 26, forms liquid passage 25 between the inwall of the head outer wall of this current limliting flap 19 and the inwall of valve body 2 liquid outlet, current limliting valve gap 17; The afterbody of described current limliting flap 19 has hollow channel 27; When pipeline is normal, the liquid outlet of described valve body 2, inlet opening 24, excessively liquid passage 25, liquid outlet opening 26, hollow channel 27 is communicated with successively with liquid outlet channel 28 and flow-limiting valve is often opened, and when pipeline leakage, inlet opening 24, excessively liquid passage 25 are not communicated with liquid outlet opening 26 and flow-limiting valve is closed; The current limliting spring 21 keeping inlet opening 24, excessively liquid passage 25, liquid outlet opening 26 and hollow channel 27 often to open is provided with between the afterbody and the afterbody of current limliting valve gap 17 of current limliting flap 19.
The structure brief introduction of fluid low temperature cut-off flow-limiting valve: shown in figure, valve rod 5, 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 fluid stop valve operating component.Flap sealing gasket 3 is contained in and ends on flap 4 groove and compress, composition fluid stop valve clack assembly.Current limliting valve gap 17, current limliting flap 19, throttling pin 20, current limliting spring 21, flow-limiting valve nut 22 and flow-limiting valve spherojoint 23 are assembled together by figure and form flow-limiting valve assembly.
Adapter 1 is welded in the unthreaded hole of valve body 2, again fluid stop valve clack assembly is arranged in valve body 2 cylindrical cavity, red copper pad 6 is arranged on valve body 2 cylindrical cavity step, is then connected with the internal thread of valve body 2 by valve pocket 7 outside thread of fluid stop valve operating component.Finally current limliting sealing gasket 18 is placed in the groove of current limliting valve gap 17 of flow-limiting valve assembly, and is connected with valve body 2 outside thread by current limliting valve gap 17 internal thread of flow-limiting valve assembly.
The specific implementation process of fluid low temperature cut-off flow-limiting valve is as follows:
1, fluid stop valve is opened: be rotated counterclockwise handwheel 16 with hand, handwheel 16 drives fluid stop valve clack assembly at valve pocket 7 internal thread with under the effect of cut-off flap 4 outside thread by valve rod 5, fluid stop valve clack assembly moves up, make the flap sealing gasket 3 of fluid stop valve clack assembly leave the sealing surface of valve body 2, liquid is flowed out by the internal channel of adapter 1, valve body 2, the flow-limiting valve spherojoint 23 of flow-limiting valve assembly.
2, fluid stop valve is closed: to turn clockwise handwheel 16 with hand, handwheel 16 drives fluid stop valve clack assembly at valve pocket 7 internal thread with under the effect of cut-off flap 4 outside thread by valve rod 5, fluid stop valve clack assembly moves down, make the flap sealing gasket 3 of fluid stop valve clack assembly be adjacent to the sealing surface of valve body 2, liquid cannot flow through the internal channel of valve body 2.
3, the metering function of flow-limiting valve: when normally working, due to the effect of the elements such as the vaporizer after flow-limiting valve, pressure regulator valve, the outlet port of the flow-limiting valve spherojoint 23 of flow-limiting valve assembly produces back pressure, make the current limliting flap 19 two ends pressure reduction of flow-limiting valve assembly less, the pressure of liquid cannot overcome spring force makes current limliting flap 19 move, thus liquid is flowed out to circular hole by the anteroposterior diameter of current limliting flap 19.When leaking appears in the connecting pipeline after flow-limiting valve, back pressure cannot be produced in the outlet port of the flow-limiting valve spherojoint 23 of flow-limiting valve assembly, the current limliting flap 19 two ends pressure reduction of flow-limiting valve assembly is larger, the pressure of liquid overcomes spring force makes current limliting flap 19 move to current limliting valve gap 17, until current limliting flap 19 is fitted with the chamfer surface of current limliting valve gap 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 (8)
1. a low temperature cut-off flow-limiting valve, comprise the valve body (2) with liquid entering hole and liquid outlet, be contained in valve rod (5) on valve body (2) with for the cut-off flap (4) keeping liquid entering hole to be communicated with liquid outlet or to cut off, and be contained in the valve pocket (7) on valve rod (5); It is characterized in that, current limliting valve gap (17) is equipped with at described valve body (2) liquid outlet place, between this current limliting valve gap (17) and valve body (2) liquid outlet, be provided with current limliting flap (19); Described current limliting valve gap (17) has liquid outlet channel (28), the head of described current limliting flap (19) is provided with inlet opening (24) and liquid outlet opening (26), forms liquid passage (25) between the inwall of the head outer wall of this current limliting flap (19) and the inwall of valve body (2) liquid outlet, current limliting valve gap (17); The afterbody of described current limliting flap (19) has hollow channel (27); When pipeline is normal, the liquid outlet of described valve body (2), inlet opening (24), excessively liquid passage (25), liquid outlet opening (26), hollow channel (27) is communicated with successively with liquid outlet channel (28) and flow-limiting valve is often opened, when pipeline leakage, inlet opening (24), excessively liquid passage (25) are not communicated with liquid outlet opening (26) and flow-limiting valve are closed; The elastic limit stream unit keeping inlet opening (24), excessively liquid passage (25), liquid outlet opening (26) and hollow channel (27) often to open is provided with between the afterbody and the afterbody of current limliting valve gap (17) of current limliting flap (19).
2. low temperature cut-off flow-limiting valve according to claim 1, 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).
3. low temperature cut-off flow-limiting valve according to claim 1, it is characterized in that, described elastic limit stream unit is for being arranged on the current limliting spring (21) between the afterbody of current limliting flap (19) and the afterbody of current limliting valve gap (17).
4. low temperature cut-off flow-limiting valve according to claim 1, is characterized in that, be provided with stuffing box packing between described valve rod (5) and valve pocket (7), be provided with Gland (10) above stuffing box packing.
5. low temperature cut-off flow-limiting valve according to claim 1, it is characterized in that, described current limliting flap (19) is provided with current limliting sealing gasket (18) with the joint of valve body (2).
6. low temperature cut-off flow-limiting valve according to claim 1, it is characterized in that, the bottom of described cut-off flap (4) is provided with groove, is pressed with flap sealing gasket (3) in this groove.
7. low temperature cut-off flow-limiting valve according to claim 1, it is characterized in that, the tail end of described current limliting valve gap (17) is fixed together by flow-limiting valve nut (22) and a flow-limiting valve spherojoint (23).
8. low temperature cut-off flow-limiting valve according to claim 1, is characterized in that, described current limliting flap (19) is equipped with throttling pin (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510715795.9A CN105221771A (en) | 2015-10-29 | 2015-10-29 | A kind of low temperature cut-off flow-limiting valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510715795.9A CN105221771A (en) | 2015-10-29 | 2015-10-29 | A kind of low temperature cut-off flow-limiting valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105221771A true CN105221771A (en) | 2016-01-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510715795.9A Pending CN105221771A (en) | 2015-10-29 | 2015-10-29 | A kind of low temperature cut-off flow-limiting valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105221771A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN113074262A (en) * | 2021-03-23 | 2021-07-06 | 中海石油(中国)有限公司深圳分公司 | Flow limiting valve for filling |
| CN113236972A (en) * | 2021-04-25 | 2021-08-10 | 张家港中集圣达因低温装备有限公司 | Low-temperature gas cylinder and liquid outlet device thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008019883A (en) * | 2006-07-10 | 2008-01-31 | Toho Gas Co Ltd | Small-diameter stop valve for extremely low temperature |
| CN202140576U (en) * | 2011-07-01 | 2012-02-08 | 宁波三安制阀有限公司 | Low-temperature stop valve |
| CN102588616A (en) * | 2012-03-09 | 2012-07-18 | 浙江师范大学 | Stop valve for low-temperature liquid containers and assembling method thereof |
| 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 |
| CN203686288U (en) * | 2014-02-14 | 2014-07-02 | 成都朗瑞深冷科技有限公司 | Flow-limiting 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 |
-
2015
- 2015-10-29 CN CN201510715795.9A patent/CN105221771A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008019883A (en) * | 2006-07-10 | 2008-01-31 | Toho Gas Co Ltd | Small-diameter stop valve for extremely low temperature |
| CN202140576U (en) * | 2011-07-01 | 2012-02-08 | 宁波三安制阀有限公司 | Low-temperature stop valve |
| CN102588616A (en) * | 2012-03-09 | 2012-07-18 | 浙江师范大学 | Stop valve for low-temperature liquid containers and assembling method thereof |
| 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 |
| CN203686288U (en) * | 2014-02-14 | 2014-07-02 | 成都朗瑞深冷科技有限公司 | Flow-limiting 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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN113074262A (en) * | 2021-03-23 | 2021-07-06 | 中海石油(中国)有限公司深圳分公司 | Flow limiting valve for filling |
| CN113236972A (en) * | 2021-04-25 | 2021-08-10 | 张家港中集圣达因低温装备有限公司 | Low-temperature gas cylinder and liquid outlet device thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20160106 |