CN202176433U - Vent valve for fuel oil tank - Google Patents
Vent valve for fuel oil tank Download PDFInfo
- Publication number
- CN202176433U CN202176433U CN2011202572609U CN201120257260U CN202176433U CN 202176433 U CN202176433 U CN 202176433U CN 2011202572609 U CN2011202572609 U CN 2011202572609U CN 201120257260 U CN201120257260 U CN 201120257260U CN 202176433 U CN202176433 U CN 202176433U
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- valve
- fuel tank
- needle
- valve port
- fuel
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Abstract
The utility model discloses a vent valve capable of preventing a fuel from rushing out when a fuel oil tank is inclined or toppled, and efficiently preventing the fuel from jumping out due to an overfilling of fuel or an oscillation when a working machine normally works, wherein the vent valve is simple and reliable in structure. The vent valve is disposed on the top of an oil tank, and comprises a valve body; the valve body comprises a first tube body forming a first passage, and a valve bottom cover forming a second passage; a valve cavity is formed in the interior of the valve body, the first passage and the second passage are located on the top and bottom of the valve cavity respectively, and the first tube body is communicated with a valve opening disposed on the valve cavity; the vent valve further comprises a valve opening-closing device held in the valve cavity and comprising a valve core, a ball body capable of pushing the valve core to move up and down, and a ball holder for placing the ball body; the valve core comprises a float capable of floating on the liquid level of the fuel and keeping the valve core freely moving up and down in the valve cavity, and a valve needle integrally connected with one side of the float, and the other side of the float is contacted with the ball body; and the valve needle can be inserted into the valve opening, and the valve core is provided with a valve opening-closing component matched with the valve opening at one side of the valve needle.
Description
Technical field
The utility model relates to a kind of valve, in particular for the vent valve on the fuel tank.
Background technique
With the small utility gasoline engine micro pump, generator set, snowplow, lawnmower or the independent working machines such as power engine of power, generally on the machine or be provided with independently on the corresponding frame that fuel tank provides fuel.During the general gasoline engines proper functioning, fuel oil will utilize high potential difference and the negative pressure of petrol engine own to inject combustion chamber of petrol engine continuously, and this just needs fuel tank and atmosphere to keep communicating.Fuel tank and atmosphere adopt two kinds of ways usually: the one, through fuel tank cap and atmosphere; The one, through a special vent valve is installed at the fuel tank top, vent valve communicates with the gas handling system of general gasoline engines.Two kinds of methods when petrol engine quits work, all possibly cause fuel-steam directly to enter atmosphere and befouling environment.For the control fuel-steam directly enters atmosphere; On the basis of vent valve, canister generally is set behind valve again, and (canister of mentioning in this specification is the content of known technology; In any accompanying drawing of this specification, all do not mark its schematic representation) collect, the absorption fuel-steam; In petrol engine when work,, the negative pressure of fuel-steam through petrol engine intake system that is attracted in the canister is transported to gas handling system, and gets into the firing chamber after the air mixing and participates in burning.Simultaneously; For prevent the fuel tank run-off the straight or when toppling over fuel oil get into canister through vent valve and make that activated adsorption material (like active carbon) lost efficacy in the canister; Be provided with the control valve unit that stops fuel to get into canister because of accident in the vent valve; And under normal circumstances, this control valve unit does not hinder fuel tank and keeps communicating with atmosphere.Such vent valve is on the books in the Chinese patent document of CN101509441A at publication number.
The subject matter that this existing technology exists is only to have solved the fuel tank harmful effect that fuel causes through vent valve when tilting or toppling over.But place and during proper functioning in that working machine is normal, still might be because the situation that fuel influences the discharging of motor through vent valve entering follow up device canister or gas handling system or influences the motor proper functioning take place in fuel adding overfill or the vibration that produces because of working machine work.Existing technology can not address this problem.
The model utility content
For overcoming the deficiency of above-mentioned existing technology; The utility model proposes a kind of fuel that can when fuel tank tilts or topples over, prevent and goes out; Also can effectively prevent the vent valve that working machine scurries out fuel because of fuel overfill or concussion when proper functioning, it is simple and reliable for structure.
The fuel tank vent valve that the utility model provided; Be arranged on the fuel tank top; Comprise valve body, said valve body has first body that forms first path, the valve bottom that forms alternate path, and this valve inner forms valve pocket; Said first path and alternate path lay respectively at the top and the bottom of valve pocket, and said first body is provided with valve port with said valve pocket and is connected; The valve opening and closing device; Be accommodated in the said valve pocket; Have and be inserted into the said valve port and the spool that can freely move up and down, can promote spheroid that said spool moves up and down and the ball seat of laying said spheroid and when valve body tilts, can making said spheroid generation rolling and spool is moved along valve pocket, said ball seat is set to the part of alternate path; Its specialization is: said spool has and can float on level of fuel and make spool in valve pocket, keep float that freely moves up and down and the needle that is connected as a single entity with float one side; The opposite side of said float contacts with said spheroid; Said needle can be inserted into said valve port, and said spool is provided with the valve that cooperates with said valve port in needle one side and opens and closes element.
Such scheme, when working machine tilted or topples over, spheroid was moved because of action of gravity, and spheroid can promote the spool band and valve switching element execution valve closing motion, thereby closes vent valve, prevents that fuel from flowing out.Simultaneously; After making the fuel admission valve chamber in the fuel adding overfill or because of working machine vibration; Fuel possibly reach the degree that float is floated in valve pocket; Thereby the spool that float and upward fixing needle thereof are formed will move up, and the set valve of needle one side opens and closes element and will carry out the valve closing motion and cut out vent valve.In addition, needle when carrying out the valve closing motion, can play the leading role of spool inserting under the situation of valve port, makes valve open and close cooperating more accurately between element and the valve port, flexibly.
On the basis of aforementioned schemes, valve opens and closes the sealing plain cushion that element is set to the needle bottom, and said sealing plain cushion can cover and the shutoff valve port when valve is carried out closing motion.Such valve opens and closes hemispherical seal or the coniform seal that element also can be set to the needle bottom, and said hemispherical seal, coniform seal match with valve port respectively and merge the shutoff valve port.Said valve opens and closes hemispherical top or the coniform top that element also can be set to needle, and said hemispherical top or coniform top cooperate with hemispherical valve port and coniform valve port respectively and the shutoff valve port.All these schemes all can be closed vent valve under the effect of closing valve events.
When valve switching element was set to the hemispherical seal of needle bottom or is set to the hemispherical top of needle, the fitting surface of shutoff valve port was annular wire or annular sphere.When valve switching element was set to the coniform seal of needle bottom or is set to the coniform top of needle, the fitting surface of shutoff valve port was annular wire or circular cone.
Further, the ball seat of vent valve is wholely set on said valve bottom and is turbination, vertically has cross recess on it and is communicated with alternate path.Like this, when vent valve tilted because of fuel tank or topples over, spheroid can move along the rounding conical surface because of action of gravity, moves to the direction of closing vent valve thereby make the float band needle; And cross recess then makes valve pocket be communicated with alternate path.
Further improve, also can be wholely set second body in the valve bottom outside and become the part of alternate path, can establish the installation gum cover on second body.Such mode can and be installed gum cover through second body vent valve is installed on the fuel tank, thereby makes the top of valve body expose fuel tank.Another mount scheme also can be established the installation gum cover at the valve body middle part, and the major part of valve body can sink among the fuel tank like this.
Further, the spheroid of said vent valve is a steel ball, and can guarantee like this to close for vent valve provides enough power.
Description of drawings
Fig. 1 is the fuel tank vent valve structural representation of the utility model.
Fig. 2 is the structural representation of valve hole part among Fig. 1.
Fig. 3 is a P portion local enlarged diagram in another embodiment among Fig. 1.
Fig. 4 is a P portion local enlarged diagram in another embodiment among Fig. 1.
Fig. 5 is a P portion local enlarged diagram in another embodiment among Fig. 1.
Fig. 6 is a P portion local enlarged diagram in another embodiment among Fig. 1.
Fig. 7 is a P portion local enlarged diagram in another embodiment among Fig. 1.
Fig. 8 is the schematic top plan view of valve bottom and ball seat among Fig. 1.
Among the figure, 100 is valve body, and 110 is first path, and 120 is first body, and 130 is alternate path, and 140 is the valve bottom; 150 is valve port, and 160 is ball seat, and 161 is cross recess, and 170 for installing gum cover, and 200 is valve pocket; 300 is the valve opening and closing device, and 310 is spool, and 311 is float, and 312 is needle, and 313 are valve switching element; 313a seals plain cushion, the hemispherical seal of 313b, and the coniform seal of 313c, 313d are hemispherical top, the coniform top of 313e.
Embodiment
Below in conjunction with accompanying drawing and the embodiment that provides the utility model is further specified.
Like Fig. 1, shown in Figure 2, the fuel tank vent valve of the utility model is arranged on fuel tank top (not shown); Comprise valve body 100, one-body molded on the valve body 100 have first body 120 and form first path 110, and valve body 100 bottoms are provided with valve bottom 140; Be formed with alternate path 130 on the valve bottom 140; These valve inner formation valve pocket 200, the first paths 110 and alternate path 130 lay respectively at the top and the bottom of valve pocket 200, and first body 120 is connected with valve pocket 200 through valve port 150; Valve opening and closing device 300 is contained in the valve pocket 200; Have and can be inserted into valve port 150 and the spool 310 that freely moves up and down, can promote spheroid 320 that spool 310 moves up and down and the ball seat 160 of laying spheroid 320 and when valve body 100 tilts, can making spheroid 320 rollings take place and spool 310 is moved along valve pocket 200, ball seat 160 communicates with alternate path; Spool 310 comprises that float 311, needle 312 and valve open and close element 313; Float 311 can float on level of fuel and make spool 310 in valve pocket 200, keep freely moving up and down; One side one of float 311 links to each other with needle 312, and the opposite side of float 311 contacts with spheroid 320, the side periphery of float 311 and valve pocket 200 Spielpassung; Needle 312 can be inserted in the valve port 150, and valve switching element 313 is positioned at needle 312 1 sides and cooperates to open and close vent valve with valve port 150.
This is a basic embodiment; When valve body 100 tilts or topples over; Liquid fuel in the fuel tank possibly get into valve pockets 200 bottoms by second air vent 130, ball seat 160, again through the gap of float 311 and valve body 100 or the apertures of float 311 itself get into the top of valve pocket 200; Simultaneously; Spheroid 320 takes place to roll and spool 310 is moved along valve pocket 200 under action of gravity; And make the valve switching element 313 that is positioned at needle 312 1 sides cooperate shutoff valve port 150 with valve port 150; Vent valve is closed, and gets into that the liquid fuel of valve pocket 200 is unlikely to get into follow-up canister device or gas handling system influences normal working of engine through valve port 150, first path 110.Equally; When fuel tank is in the normal position; If make fuel admission valve chamber 200 because of fuel tank filling overfill or because of working machine vibrates; Arrive float 311 positions like its liquid level, float 311 will produce buoyancy and cooperate shutoff valve port 150 along the valve switching element 313 that valve pocket 200 moved and drove needle 312 1 sides with valve port 150, reach that identical prevention fuel gets into follow-up canister device or gas handling system and the purpose that influences normal working of engine.And be in the normal position at fuel tank; There is not liquid fuel to get under the situation of valve pocket 200 yet; No matter be that fuel vapour in the fuel tank is to canister device or gas handling system discharging; Still the gas exchange between gas handling system fuel tank and atmosphere because this moment, spool 310 can not produce any action, thereby can not be affected.
As shown in Figure 3; Another embodiment of the utility model is; Valve among Fig. 1 opens and closes element 313 and is restricted to the sealing plain cushion 313a that is located at needle 312 bottoms, and when spool 310 was carried out the cut-off valves action, sealing plain cushion 313a can cover and shutoff valve port 150 and vent valve is closed.
The utility model embodiment as shown in Figure 4; Valve opens and closes the hemispherical seal 313b that element 313 is set to needle 312 bottoms; Valve port 150 is a circular arc chamfering at the periphery of valve pocket 200 1 sides; When spool 310 was carried out the cut-off valve action, hemispherical seal 313b partly got into the periphery of the circular arc chamfering of valve port 150, and line contacts shape shutoff valve port 150 and closes vent valve ringwise.Certainly, valve port 150 valve pocket 200 1 sides also can be set to hemispherical seal 313b corresponding in heavy sphere concave station (not shown), like this, when closing vent valve, hemispherical seal 313b and valve port 150 sphere ringwise contact.
The utility model embodiment as shown in Figure 5; Valve opens and closes the coniform seal 313c that element 313 is set to needle 312 bottoms; Valve port 150 is at the periphery circular arc chamfering of valve pocket 200 1 sides; When spool 310 was carried out the cut-off valves action, coniform seal 313c and valve port 150 line ringwise contacted shutoff valve port 150 and close vent valve.In the present embodiment, valve port 150 valve pocket 200 1 sides also can be set to coniform seal 313c corresponding in heavy conical surface concave station (not shown), like this, when closing vent valve, coniform seal 313c and valve port 150 conical surface ringwise contact.
The utility model embodiment as shown in Figure 6; Valve opens and closes the hemispherical top 313d that element 313 is set to needle 312; Valve port 150 is a sphere with the surface of contact relative set of hemispherical top 313d; When spool 310 was carried out the cut-off valves action, hemispherical top 313d and valve port 150 sphere ringwise contacted shutoff valve port 150 and close vent valve.
The utility model embodiment as shown in Figure 7; Valve opens and closes the coniform top 313e that element 313 is set to needle 312; Valve port 150 is a conical surface with the surface of contact relative set of coniform top 313e; When spool 310 was carried out the cut-off valves action, coniform top 313e and valve port 150 conical surface ringwise contacted shutoff valve port 150 and close vent valve.
Like Fig. 1, shown in Figure 8, the utility model also has been wholely set on valve bottom 140 and has been obconic ball seat 160, vertically has cross recess 161 on the ball seat 160, and cross recess 161 is communicated with alternate path 130.Like this, can between valve pocket 200, ball seat 160, alternate path 130, freely exchange and not influenced by any of spheroid 320 from the fuel vapour of fuel tank or liquid fuel and from the atmosphere of gas handling system.In the present embodiment, cross recess also can be the spider fin of three-flute form, also can be the straight groove of two flute profile formulas; Turbination ball seat 160 also can be a sphere shape ball seat.
More than among each embodiment, spheroid 320 can be the steel ball (not shown), also can be that other can sensitively promote any other material spheroid that spool 310 moves along valve pocket 200 when ball seat 160 tilts or topples over.Float 311 is the plastic foam cylindrical body, and one of which side central vertical is established needle 312, and needle 312 does not pass float 311 to opposite side; The aperture that runs through can be set with through oil gas or liquid fuel on the float 311; Float 311 also can be made by other materials of floating in can liquid fuel withins, also can be other devices that float in can liquid fuel withins, all should be in claim scope of the utility model and so on.
As shown in Figure 1, when the vent valve of the utility model is installed, be provided with annular concave platform at the middle part of valve body 100, be installed with gum cover 170 is installed, gum cover 170 will be installed again press fit into completion installation in the mounting hole (not shown) on the fuel tank.As the another kind of mode of installing; Also can be wholely set the second body (not shown) in the outside of valve bottom 140 and make second body become the part of alternate path 130; On second body, clamp the gum cover (not shown) is installed, again second body and installation gum cover thereof are pressed fit into completion installation in the mounting hole (not shown) on the corresponding fuel tank.
The above-mentioned fuel tank vent valve technology that the utility model is related the fuel tank of said kind working machine, also can be used for the fuel tank of motorcycle and other vehicles in being applicable to specification.
Claims (12)
1. a fuel tank vent valve is arranged on the fuel tank top, comprises
Valve body has first body that forms first path, the valve bottom that forms alternate path, and this valve inner forms valve pocket, and said first path and alternate path lay respectively at the top and the bottom of valve pocket, and said first body is provided with valve port with said valve pocket and is connected;
The valve opening and closing device; Be accommodated in the said valve pocket; Have and can be inserted into said valve port and the spool that freely moves up and down, can promote spheroid that said spool moves up and down and the ball seat of laying said spheroid and when valve body tilts, can making said spheroid generation rolling and spool is moved along valve pocket, said ball seat is set to the part of alternate path;
It is characterized in that; Said spool has and can float on level of fuel and make spool in valve pocket, keep float that freely moves up and down and the needle that is connected as a single entity with float one side; The opposite side of said float contacts with said spheroid; Said needle can be inserted into said valve port, and said spool is provided with the valve that cooperates with said valve port in needle one side and opens and closes element.
2. fuel tank vent valve as claimed in claim 1 is characterized in that, said valve opens and closes the sealing plain cushion that element is set to the needle bottom, and said sealing plain cushion can cover and the shutoff valve port.
3. fuel tank vent valve as claimed in claim 1 is characterized in that, said valve opens and closes the hemispherical seal that element is set to the needle bottom, and said hemispherical seal can cooperate with valve port and the shutoff valve port.
4. fuel tank vent valve as claimed in claim 1 is characterized in that, said valve opens and closes the coniform seal that element is set to the needle bottom, and said coniform sealing can cooperate with valve port and the shutoff valve port.
5. fuel tank vent valve as claimed in claim 1 is characterized in that, said valve opens and closes the hemispherical top that element is set to needle, and said hemispherical top can cooperate with valve port and the shutoff valve port.
6. fuel tank vent valve as claimed in claim 1 is characterized in that, said valve opens and closes the coniform top that element is set to needle, and said coniform top can cooperate with valve port and the shutoff valve port.
7. like claim 3 or 5 described fuel tank vent valves, it is characterized in that the fitting surface of shutoff valve port is annular wire or annular sphere.
8. like claim 4 or 6 described fuel tank vent valves, it is characterized in that the fitting surface of shutoff valve port is annular wire or circular cone.
9. like the described arbitrary fuel tank vent valve of claim 1 to 6, it is characterized in that said ball seat is wholely set on said valve bottom and is turbination, vertically have cross recess on it and be communicated with alternate path.
10. like the described arbitrary fuel tank vent valve of claim 1 to 6, it is characterized in that the said valve bottom outside also has second body and becomes the part of alternate path, second body is provided with the installation gum cover.
11., it is characterized in that said valve body middle part is provided with the installation gum cover like the described arbitrary fuel tank vent valve of claim 1 to 6.
12., it is characterized in that said spheroid is a steel ball like the described arbitrary fuel tank vent valve of claim 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202572609U CN202176433U (en) | 2011-07-20 | 2011-07-20 | Vent valve for fuel oil tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202572609U CN202176433U (en) | 2011-07-20 | 2011-07-20 | Vent valve for fuel oil tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202176433U true CN202176433U (en) | 2012-03-28 |
Family
ID=45866317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202572609U Expired - Lifetime CN202176433U (en) | 2011-07-20 | 2011-07-20 | Vent valve for fuel oil tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202176433U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251891A (en) * | 2011-07-20 | 2011-11-23 | 重庆润通动力有限公司 | Fuel oil tank air vent valve |
-
2011
- 2011-07-20 CN CN2011202572609U patent/CN202176433U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251891A (en) * | 2011-07-20 | 2011-11-23 | 重庆润通动力有限公司 | Fuel oil tank air vent valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20131203 Address after: 402247 B District, industrial park, Jiangjin District, Chongqing Patentee after: Chongqing RATO Power Co., Ltd. Address before: 402247 B District, industrial park, Jiangjin District, Chongqing Patentee before: Chongqing Runtong Dongli Co., Ltd. |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Fuel oil tank air vent valve Effective date of registration: 20140128 Granted publication date: 20120328 Pledgee: China Co truction Bank Corp Jiangjin branch Pledgor: Chongqing RATO Power Co., Ltd. Registration number: 2014500000003 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151210 Address after: 402260 B District, industrial park, Jiangjin District, Chongqing Patentee after: CHONGQING RUNTONG TECHNOLOGY CO., LTD. Address before: 402247 B District, industrial park, Jiangjin District, Chongqing Patentee before: Chongqing RATO Power Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120328 |