CN219974650U - Pressure relief device for general small gasoline engine oil tank - Google Patents
Pressure relief device for general small gasoline engine oil tank Download PDFInfo
- Publication number
- CN219974650U CN219974650U CN202321592235.5U CN202321592235U CN219974650U CN 219974650 U CN219974650 U CN 219974650U CN 202321592235 U CN202321592235 U CN 202321592235U CN 219974650 U CN219974650 U CN 219974650U
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- CN
- China
- Prior art keywords
- oil tank
- pressure relief
- pressure
- relief valve
- relief device
- 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.)
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Links
- 239000010711 gasoline engine oil Substances 0.000 title abstract description 4
- 239000003502 gasoline Substances 0.000 claims abstract description 16
- 230000000694 effects Effects 0.000 claims description 4
- 239000002828 fuel tank Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 239000003921 oil Substances 0.000 abstract description 55
- 238000002485 combustion reaction Methods 0.000 abstract description 7
- 238000009423 ventilation Methods 0.000 abstract description 7
- 238000010521 absorption reaction Methods 0.000 abstract description 6
- 239000000203 mixture Substances 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010705 motor oil Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Landscapes
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
The utility model discloses a pressure relief device for a general small gasoline engine oil tank, which comprises an upper shell, a lower shell, a pressure relief valve and a pressure relief valve mounting seat, wherein the pressure relief device is respectively communicated with the oil tank and an air filter through a vent pipe, the pressure relief valve on the pressure relief device can realize unidirectional ventilation, when the pressure in the oil tank is increased, the pressure relief valve can be allowed to be opened in one direction, gasoline mixed gas in the oil tank is discharged to the air filter through the one-way valve and further enters an engine through a carburetor to participate in combustion, so that the pressure relief of the oil tank can be realized, the normal oil absorption of the carburetor and the normal work of the engine are ensured, the deformation of the oil tank caused by the overlarge pressure in the oil tank is avoided, and the pollution caused by the discharge of the gasoline mixed gas into the environment is also avoided.
Description
Technical Field
The utility model relates to the technical field of general small two-stroke engines, in particular to a pressure relief device for a general small gasoline engine oil tank.
Background
At present, HDPE high-density polyethylene is commonly adopted in fuel tanks of general small two-stroke engines. When the oil tank is used in a high-temperature environment, the heat of an engine or the high-temperature environment outside is easy to aggravate the evaporation of gasoline in the oil tank, so that excessive pressure is generated in the oil tank, the oil tank is deformed, the normal oil absorption of a carburetor is influenced, and the normal operation of the engine is influenced. If necessary, the tank with excessive pressure needs to be depressurized.
The utility model is respectively communicated with the oil tank and the air filter through the breather pipe, wherein the pressure relief valve on the pressure relief device can realize one-way ventilation, when the pressure in the oil tank is increased, the one-way ventilation can be allowed, the gasoline mixture in the oil tank is discharged to the air filter through the one-way valve, and further enters the engine through the carburetor to be subjected to internal reference and combustion, so that the pressure relief of the oil tank can be realized, the normal oil absorption of the carburetor and the normal operation of the engine are ensured, the deformation of the oil tank caused by the overlarge pressure in the oil tank is avoided, and the pollution caused by the discharge of the gasoline mixture into the environment is also avoided.
Disclosure of Invention
The utility model aims to provide a pressure relief device for a general small-sized petrol engine oil tank, which is respectively communicated with an oil tank and an air filter through a breather pipe, wherein a pressure relief valve on the pressure relief device can realize unidirectional ventilation, when the pressure in the oil tank is increased, the pressure relief device can allow unidirectional opening, petrol mixed gas in the oil tank is discharged to the air filter through the unidirectional valve and further enters an engine through a carburetor to participate in combustion, so that the pressure relief of the oil tank pressure can be realized, the normal oil absorption of the carburetor and the normal work of the engine are ensured, the deformation of the oil tank caused by the overlarge pressure in the oil tank is avoided, and the pollution caused by the discharge of petrol mixed gas to the environment is also avoided.
The technical scheme of the utility model is as follows:
the utility model provides a general small-size petrol engine pressure relief device for oil tank, mainly includes upper casing, lower casing, relief valve mount pad to communicate with oil tank, empty filter respectively through the breather pipe. The relief valve is installed on the relief valve mount pad to it is fixed through upper and lower casing. The relief valve is the rubber material, and the department of ventilating designs to arc structure, convex surface towards the oil tank to adopt cross cutting to divide into four diaphragms uniformly. When the pressure in the oil tank is greater than atmospheric pressure, the air pressure acts on the convex surface to jack up the four diaphragms towards the concave surface to form a cross-shaped gap, so that the pressure relief effect is achieved.
Preferably, the relief valve is made of rubber, the ventilation part is designed into an arc-shaped structure, the convex surface faces the oil tank, and the relief valve is divided into four membranes uniformly by cross cutting.
Further, when the pressure in the oil tank is greater than atmospheric pressure, the air pressure acts on the convex surface, and the four diaphragms are jacked up towards the concave surface to form a cross-shaped gap, so that the pressure relief effect is achieved.
The beneficial effects are that: when the pressure in the oil tank becomes large, the one-way opening can be allowed, the gasoline mixture in the oil tank is discharged to the air filter through the one-way valve, and further the gasoline mixture enters the engine through the carburetor to be subjected to internal reference and combustion, so that the pressure relief of the oil tank pressure can be realized, the normal oil absorption of the carburetor and the normal operation of the engine are ensured, the deformation of the oil tank caused by the overlarge pressure in the oil tank is avoided, and the pollution caused by the discharge of the gasoline mixture to the environment is also avoided.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate and explain the utility model and together with the description serve to explain the utility model.
FIG. 1 is a schematic installation view of the present utility model;
FIG. 2 is a schematic diagram of the structure of the present utility model;
FIG. 3 is a schematic view of a pressure relief valve according to the present utility model;
fig. 4 is a schematic structural view of the installation seat of the pressure release valve.
Description of the number in the drawings: 1. an upper housing; 2. a vent pipe; 3. a pressure release valve; 3-1, a cross pressure relief joint; 4. a pressure relief valve mounting seat; 4-1, a baffle; 4-2, vent holes; 5. a lower housing; 6. an oil tank; 7. an air filter; 8. and (5) a carburetor.
Detailed Description
As shown in fig. 1 to 4, the pressure relief device for the general small-sized petrol engine oil tank mainly comprises an upper shell 1, a lower shell 5, a pressure relief valve 3 and a pressure relief valve mounting seat 4. The pressure relief device is respectively communicated with the oil tank 6 and the air filter 7 through the breather pipe 2, when the pressure in the oil tank 6 is increased, the pressure relief valve 3 can be allowed to be opened unidirectionally, the gasoline mixture in the oil tank 6 is discharged to the air filter 7 through the pressure relief valve 3, and further, the gasoline mixture enters the engine through the carburetor 8 to participate in combustion.
The pressure release valve 3 is made of rubber, the ventilation part is designed into an arc-shaped structure, the convex surface faces the oil tank, and the pressure release valve is divided into four membranes uniformly by cross cutting. When the pressure in the oil tank is greater than the atmospheric pressure, the air pressure acts on the convex surface to jack up the four diaphragms towards the concave surface to form a cross-shaped pressure relief joint 3-1, so that the pressure relief effect is achieved.
The pressure release valve mounting seat 4 is provided with a baffle 4-1 below the convex surface of the pressure release valve 3, and the size of the baffle is equivalent to the size of a cross pressure release slot 3-1 on the pressure release valve 3; and the periphery of the baffle is provided with vent holes 4-2 for the mixed gas in the oil tank to pass through.
The specific working process comprises the following steps: as described above, the pressure relief device is respectively communicated with the oil tank 6 and the air filter 7 through the vent pipe 2, when the pressure in the oil tank 6 is increased, the mixture of the gasoline and the air with higher pressure firstly enters the pressure relief device through the vent pipe 2 connected with the oil tank 6, then passes through the vent hole 4-2 on the pressure relief valve mounting seat 4, acts on the convex surface of the pressure relief valve 3, and lifts up the four diaphragms towards the concave surface to form a cross-shaped pressure relief seam 3-1, then passes through the cross-shaped pressure relief seam 3-1, enters the air filter 7 through the vent pipe 2 connected with the air filter 7, and further enters the engine through the carburetor 8 to participate in combustion.
The beneficial effects are that: the pressure relief device is respectively communicated with the oil tank and the air filter through the vent pipe, wherein the pressure relief valve on the pressure relief device can realize unidirectional ventilation, when the pressure in the oil tank is increased, the pressure relief device can be allowed to be opened unidirectionally, the gasoline mixed gas in the oil tank is discharged to the air filter through the unidirectional valve, and further the gasoline mixed gas enters the engine through the carburetor to be subjected to internal reference and combustion, so that the pressure relief of the oil tank can be realized, the normal oil absorption of the carburetor and the normal operation of the engine are ensured, the deformation of the oil tank caused by the overlarge pressure in the oil tank is avoided, and the pollution caused by the discharge of the gasoline mixed gas to the environment is also avoided.
Although the structure and method for implementing the present utility model have been described in detail, the present utility model is not limited thereto, and those skilled in the art can modify the above-described embodiments in terms of shape, size, and other detailed structures without departing from the technical spirit and purpose of the present utility model, and the modifications are included in the present utility model.
Claims (3)
1. The utility model provides a general small-size petrol engine pressure relief device for oil tank, mainly includes casing, lower casing, relief valve mount pad to communicate its characterized in that with oil tank, empty filter respectively through the breather pipe: the pressure relief valve is installed on the pressure relief valve installation seat and is fixed through the upper shell and the lower shell.
2. The pressure relief device for a universal small gasoline engine fuel tank of claim 1, wherein: the pressure relief valve is the rubber material, the relief valve design has the department of ventilating, the department of ventilating designs to arc structure, convex surface orientation oil tank to adopt cross cutting to divide into four diaphragms uniformly, when the oil tank internal pressure is greater than atmospheric pressure, atmospheric pressure acts on convex surface department, jack-up four diaphragms towards the concave surface, forms cross gap, plays the pressure release effect.
3. The pressure relief device for a universal small gasoline engine fuel tank of claim 1, wherein: the pressure release valve mounting seat is characterized in that a baffle is arranged below the convex surface of the pressure release valve, the size of the baffle is equal to that of a cross on the pressure release valve, and vent holes are formed in the periphery of the baffle so as to allow the mixed gas in the oil tank to pass through.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321592235.5U CN219974650U (en) | 2023-06-21 | 2023-06-21 | Pressure relief device for general small gasoline engine oil tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321592235.5U CN219974650U (en) | 2023-06-21 | 2023-06-21 | Pressure relief device for general small gasoline engine oil tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219974650U true CN219974650U (en) | 2023-11-07 |
Family
ID=88587972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321592235.5U Active CN219974650U (en) | 2023-06-21 | 2023-06-21 | Pressure relief device for general small gasoline engine oil tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219974650U (en) |
-
2023
- 2023-06-21 CN CN202321592235.5U patent/CN219974650U/en active Active
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