Leakage-proof carburetor

Abstract

The utility model discloses a leakproof carburetor which comprises a carburetor body, a floater chamber and a balance hole, a storage oil way is arranged in the carburetor body, and the balance hole is communicated with the floater chamber through the storage oil way. The position where the balance hole is communicated with the oil storage path is higher than the horizontal plane where fuel oil in the oil storage path is located when the carburetor topples to a set angle; the leakage-proof carburetor can ensure that fuel oil in the floater chamber cannot leak out from the balance hole in the inclination process of the carburetor, the fuel is saved, environmental pollution and potential safety hazards are prevented, the safety of an engine is improved, meanwhile, the overall size of the carburetor is not changed, and the carburetor is convenient to use. Compared with a leak-proof carburetor which is communicated with an external fuel oil container or an additional anti-toppling valve outside a balance hole, the leak-proof carburetor has the advantages that the required assembly space is smaller, and the leak-proof carburetor is convenient to assemble.

Description

Technical Field

[0001] The utility model relates to the technical field of carburetors, in particular to a leak-proof carburetors. Background Art

[0002] A carburetor is a mechanical device primarily used in engines, particularly internal combustion engines such as gasoline engines in automobiles, motorcycles, ships, and other equipment. Its primary function is to mix air and fuel into an appropriate ratio, forming a combustible mixture for engine combustion. The carburetor automatically adjusts the mixture concentration based on the engine's varying operating requirements. To maintain a stable mixture composition, in addition to using a float to control the fuel inlet needle valve to maintain a stable fuel level in the float chamber, a balancing hole must be installed at the top of the float chamber, connecting it to the outside world. In externally balanced carburetors, this balancing hole is connected to the atmosphere, while in internally balanced carburetors, the balancing hole is generally connected to the air filter. This maintains a stable pressure inside the float chamber and ensures proper carburetion.

[0003] In the prior art, since the carburetor balance hole is connected to the outside world, when the engine is tilted to a certain degree, the liquid level in the float chamber will not exceed the balance hole, and the fuel in the float chamber will leak out through the balance hole, which not only wastes fuel, but also pollutes the environment and creates a safety hazard. Most existing carburetors are connected to an external fuel container or an additional anti-dumping valve outside the balance hole. When the engine is tilted, the fuel will not leak out through the balance hole, but the overall volume of the carburetor becomes larger, the required assembly space increases, and the weight increases accordingly, which is inconvenient to assemble.

[0004] Therefore, it is urgent to develop a carburetor that can ensure that the fuel in the float chamber will not leak out from the balancing hole during the tilting process of the carburetor, thereby saving fuel, preventing environmental pollution and safety hazards, and improving engine safety. At the same time, the overall volume of the carburetor remains unchanged. Compared with a leak-proof carburetor with an external fuel container or an additional anti-dumping valve connected to the balancing hole, the required assembly space is smaller and it is easier to assemble. Utility Model Content

[0005] In view of this, the purpose of the present invention is to provide a leak-proof carburetor, which can ensure that the fuel in the float chamber will not leak out from the balancing hole during the tilting of the carburetor, thereby saving fuel, preventing environmental pollution and safety hazards, and improving engine safety. At the same time, the overall volume of the carburetor remains unchanged. Compared with a leak-proof carburetor with an external fuel container or an additional anti-dumping valve connected to the balancing hole, the required assembly space is smaller and it is easy to assemble.

[0006] The leak-proof carburetor of the utility model comprises a carburetor body, a float chamber and a balancing hole. A storage oil circuit is opened inside the carburetor body. The balancing hole is connected to the float chamber through the storage oil circuit. The position where the balancing hole is connected to the storage oil circuit is higher than the horizontal plane of the fuel in the storage oil circuit when the carburetor is tilted to a set angle.

[0007] Furthermore, it also includes an oil inlet channel I and an oil inlet channel II, which are respectively arranged above the float chamber and connected to the float chamber, and are used to transport the fuel in the float chamber to the storage oil circuit when the carburetor is tilted.

[0008] Furthermore, the storage oil circuit includes a main oil circuit and a branch oil circuit, and the branch oil circuit is used to connect the main oil circuits adjacent to each other.

[0009] Furthermore, the main oil circuit includes oil circuit I, oil circuit II and oil circuit III which are arranged transversely and parallel to each other. The oil circuit I, oil circuit II and oil circuit III all have set heights, the height set for oil circuit III is the lowest, and the height set for oil circuit II is the highest.

[0010] Furthermore, the branch oil circuit includes branch oil circuit I and branch oil circuit II, the branch oil circuit I extends from the right end of oil circuit I to the right end of oil circuit II to connect oil circuit I and oil circuit II, and the branch oil circuit II extends from the left end of oil circuit II to the left end of oil circuit III to connect oil circuit II and oil circuit III.

[0011] Furthermore, the branch oil circuit also includes a branch oil circuit III arranged at the lower left of the oil circuit I, the oil inlet channel I extends upward and connects to the branch oil circuit III, and the branch oil circuit III extends upward and connects to the left end of the branch oil circuit III.

[0012] Furthermore, the oil circuit I has the smallest length, and the oil circuit II has the largest length. The oil circuit II is arranged above the oil circuit I and the oil circuit III.

[0013] Furthermore, the balance hole is provided at the top of the carburetor body, and the balance hole is connected with the left end of the oil circuit II through a connecting pipe, and the connecting pipe is L-shaped.

[0014] Furthermore, the main oil circuit further includes an oil circuit IV which is orthogonally connected to the oil circuit III, and the diameter of the oil circuit IV gradually decreases to a minimum diameter along the air intake direction of the carburetor body.

[0015] Furthermore, the oil circuit IV is provided with an extension pipe at the minimum diameter, the outer diameter of the extension pipe is the same as the minimum diameter of the oil circuit IV, and the oil circuit IV is connected to the oil inlet channel II after and near the minimum diameter.

[0016] The beneficial effects of the present invention are as follows: the leak-proof carburetor of the present invention can ensure that the fuel in the float chamber will not leak out from the balancing hole during the tilting process of the carburetor, thereby saving fuel, preventing environmental pollution and safety hazards, and improving engine safety. At the same time, the overall volume of the carburetor remains unchanged. Compared with a leak-proof carburetor with an external fuel container or an additional anti-dumping valve connected to the outside of the balancing hole, the required assembly space is smaller and it is easy to assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0018] Figure 1 This is a schematic diagram of the structure of the utility model Figure I ;

[0019] Figure 2 This is a schematic diagram of the structure of the utility model Figure II ;

[0020] Figure 3 This is a schematic diagram of the structure of the utility model Figure III ;

[0021] Figure 4 This is a schematic diagram of the structure of the utility model Figure IV ;

[0022] Figure 5 This is a schematic diagram of the oil storage circuit of the utility model;

[0023] Figure 6 This is a diagram showing the fuel level when the carburetor of the utility model is tilted. Figure I ;

[0024] Figure 7 This is a diagram of the fuel level when pouring the fuel tank. Figure II ;

[0025] Figure 8 This is a diagram of the fuel level when pouring the fuel tank. Figure III . DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0028] Figure 1 This is a schematic diagram of the structure of the utility model Figure I , Figure 2 This is a schematic diagram of the structure of the utility model Figure II , Figure 3 This is a schematic diagram of the structure of the utility model Figure III , Figure 4 This is a schematic diagram of the structure of the utility model Figure IV , Figure 5 This is a schematic diagram of the oil storage circuit of the utility model. Figure 6 This is a diagram showing the fuel level when the carburetor of the utility model is tilted. Figure I , Figure 7 This is a diagram of the fuel level when pouring the fuel tank. Figure II , Figure 8 This is a diagram of the fuel level when pouring the fuel tank. Figure III, as shown in the figure: the leak-proof carburetor of this embodiment includes a carburetor body, a float chamber 7 and a balancing hole 5. A storage oil circuit is opened inside the carburetor body, and the balancing hole 5 is connected to the float chamber 7 through the storage oil circuit. The position where the balancing hole 5 is connected to the storage oil circuit is higher than the horizontal plane of the fuel in the storage oil circuit when the carburetor is tilted to a set angle; the float chamber 7 is used to store the fuel delivered from the oil inlet pipe. A float for controlling the switch of the oil inlet needle valve is installed inside the float chamber 7. The float chamber 7 controls the flow rate of the oil inlet through the float. When the oil consumption is high, the fuel content in the float chamber 7 is low, the fuel liquid level drops, the float drops, and the oil inlet needle valve opens to replenish the float chamber 7 with fuel. As the fuel is replenished, the fuel liquid level gradually rises, and the float also rises. When the float rises to the highest position, the oil inlet needle valve is closed under the action of the float. When the fuel tank 1 is closed, the oil inlet pipe no longer transports fuel to the float chamber 7. At this time, the fuel content in the float chamber 7 is the maximum fuel storage capacity of the float chamber 7. Different types of carburetors have different maximum fuel storage capacities of the float chamber 7. The position where the balancing hole 5 is connected to the storage oil circuit is higher than the horizontal plane of the fuel in the storage oil circuit when the carburetor is tilted to a set angle. This scheme takes the case where the fuel in the float chamber 7 reaches the maximum storage capacity as an example. When the carburetor is tilted, the fuel in the float chamber 7 enters the storage oil circuit, and the fuel in the storage oil circuit is at the same horizontal plane as the fuel in the float chamber 7. This horizontal plane is lower than the position where the balancing hole 5 is connected to the storage oil circuit, which means that the fuel will not leak from the balancing hole 5. Under the condition that the maximum storage capacity of the float chamber 7 can achieve fuel leakage prevention, the fuel amount less than the maximum storage capacity of the float chamber 7 can also achieve leakage prevention.

[0029] In this embodiment, the oil inlet channel I 301 and the oil inlet channel II 302 are further included. The oil inlet channel I 301 and the oil inlet channel II 302 are respectively arranged above the float chamber 7 and communicated with the float chamber 7, and are used to transport the fuel in the float chamber 7 to the storage oil circuit when the carburetor is tilted; Figure 1 and Figure 4 As shown, the oil inlet channel I 301 and the oil inlet channel II 302 are respectively arranged above the float chamber 7. Since the storage oil circuit is located inside the carburetor body, when the tilt is small, the fuel only needs to enter the oil inlet channel I 301 and the oil inlet channel II 302 to achieve the leakage-proof effect. When the tilt is large, the fuel needs to enter the oil storage pipeline through the oil inlet channel I 301 and the oil inlet channel II 302 to achieve the leakage-proof effect.

[0030] In this embodiment, the storage oil circuit includes a main oil circuit and a branch oil circuit, and the branch oil circuit is used to connect the adjacent main oil circuits; the main oil circuit includes an oil circuit I 101, an oil circuit II 102, and an oil circuit III 103 that are arranged horizontally and parallel to each other. The oil circuit I 101, the oil circuit II 102, and the oil circuit III 103 all have set heights, and the height set for the oil circuit III 103 is the lowest, and the height set for the oil circuit II 102 is the highest; Figure 1 and Figure 4 As shown, the horizontal arrangement means that the oil circuit I 101, the oil circuit II 102 and the oil circuit III 103 are arranged in sequence along the air intake direction of the carburetor and are perpendicular to the longitudinal axis of the carburetor air intake chamber. The oil circuit I 101, the oil circuit II 102 and the oil circuit III 103 all have a set height. The set height refers to the highest point of the inner wall of the air intake side of the carburetor air intake chamber as a reference point. The vertical distance between the oil circuit I 101, the oil circuit II 102 and the oil circuit III 103 and the reference point is the set height. The oil circuit III 103 is set at the lowest height, and the oil circuit II 102 is set at the highest height. Taking the carburetor model of this scheme as an example, the set height of the oil circuit I 101 is 2.35 mm, the set height of the oil circuit II 102 is 3.34 mm, and the set height of the oil circuit III 103 is 0.68 mm. Different models of carburetors can adjust the set heights of the oil circuit I 101, the oil circuit II 102 and the oil circuit III 103 according to the maximum storage capacity of the float chamber 7 to achieve the effect of preventing fuel leakage.

[0031] In this embodiment, the branch oil circuit includes a branch oil circuit I 201 and a branch oil circuit II 202. The branch oil circuit I 201 extends from the right end of the oil circuit I 101 to the right end of the oil circuit II 102 to connect the oil circuit I 101 and the oil circuit II 102. The branch oil circuit II 202 extends from the left end of the oil circuit II 102 to the left end of the oil circuit III 103 to connect the oil circuit II 102 and the oil circuit III 103. The set height of the oil circuit II 102 is greater than the set height of the oil circuit I 101. Figure 2 and Figure 5 As shown, when the branch oil circuit I201 extends from the right end of the oil circuit I101 to the right end of the oil circuit II102, the overall extension trend of the branch oil circuit I201 is to extend upward and tilt toward the right end of the oil circuit II102; the set height of the oil circuit II102 is greater than the set height of the oil circuit III103, and when the branch oil circuit II202 extends from the left end of the oil circuit II102 to the left end of the oil circuit III103, the overall extension trend of the branch oil circuit II202 is to extend downward and tilt toward the left end of the oil circuit II102.

[0032] In this embodiment, the branch oil circuit further includes a branch oil circuit III 203 provided at the lower left of the oil circuit I 101, the oil inlet channel I 301 extends upward and connects to the branch oil circuit III 203, and the branch oil circuit III 203 extends upward and connects to the left end of the branch oil circuit III 203; Figure 1 As shown, the oil inlet channel I301 extends upward and connects with the branch oil circuit III203, and the connection point is the end of the branch oil circuit III203. When the branch oil circuit III203 extends upward, the branch oil circuit III203 tilts toward the left end of the oil circuit I101 and connects with the left end of the branch oil circuit III203.

[0033] In this embodiment, the length of the oil circuit I101 is the smallest, and the length of the oil circuit II102 is the largest. The oil circuit II102 is arranged above the oil circuit I101 and the oil circuit III103. Different types of carburetors can adjust the lengths of the oil circuit I101, the oil circuit II102 and the oil circuit III103 according to the maximum fuel storage capacity of the float chamber 7. Taking the carburetor model of this solution as an example, the length of the oil circuit I101 is 34.28 mm, the length of the oil circuit II102 is 38.48 mm, and the length of the oil circuit III103 is 35.66 mm.

[0034] In this embodiment, the balance hole 5 is provided at the top of the carburetor body, and the balance hole 5 is connected to the left end of the oil passage II 102 through a connecting pipe 4, and the connecting pipe 4 is L-shaped; Figure 3 As shown, since the oil circuit II 102 is arranged higher than the oil circuit I 101 and the oil circuit III 103, the height of the oil circuit II 102 is higher than that of the oil circuit I 101 and the oil circuit III 103, and the oil circuit II 102 is also closer to the top of the carburetor body. The balancing hole 5 is connected to the left end of the oil circuit II 102 through the connecting pipe 4, which can increase the horizontal height of the balancing hole 5 itself compared to the fuel in the float chamber 7, and can better cooperate with the storage oil circuit to achieve the effect of preventing fuel leakage when the carburetor is tilted.

[0035] In this embodiment, the main oil circuit further includes an oil circuit IV104 that is orthogonally connected to the oil circuit III103. The diameter of the oil circuit IV104 gradually decreases to a minimum diameter along the air intake direction of the carburetor body. The oil circuit IV104 is provided with an extension pipe 6 at the minimum diameter. The outer diameter of the extension pipe 6 is the same as the minimum diameter of the oil circuit IV104. The oil circuit IV104 is connected to the oil inlet channel II302 after and near the minimum diameter. When the carburetor is tilted, in the oil circuit III103, Part of the fuel flows from the oil inlet channel II 302 through the extension pipe 6 and enters the oil channel IV 104 at the minimum diameter of the oil channel IV 104. When the carburetor returns to the non-dumped state, part of the fuel flows in the oil channel IV 104 along the direction of gradually decreasing diameter to the oil inlet channel II 302, and then flows back from the oil inlet channel II 302 to the float chamber 7. In the process of switching from large diameter to small diameter, the flow rate of the fuel in the oil channel IV 104 will increase, which can improve the efficiency of the fuel returning to the float chamber 7. The length and diameter of the oil channel IV 104 are The diameter variation range can be adjusted according to the maximum fuel storage capacity of the float chamber 7 of different carburetors, which can ensure that when the carburetor is tilted, the fuel entering the storage oil circuit will not leak from the balance hole 5; in many tilting situations of the carburetor, when it is tilted to the intake cavity facing downward, the liquid level of the fuel in the float chamber 7 will be higher than the minimum diameter of the oil circuit IV 104. At this time, the fuel enters the oil circuit IV 104 and enters the oil circuit II 102 through the oil circuit III 103 and the branch oil circuit II 202. Since the oil circuit II 102 is aligned with the balance hole 5, the fuel level in the float chamber 7 will be higher than the minimum diameter of the oil circuit IV 104. Hole 5 is connected, which will cause fuel to leak from the balancing hole 5. Therefore, an extension tube 6 is provided at the minimum diameter of the oil circuit IV 104. When the carburetor is tilted to the intake chamber facing downward, the fuel cannot enter the oil circuit IV 104 from the minimum diameter of the oil circuit IV 104, thereby preventing the fuel from leaking from the balancing hole 5. The extension tube 6 can be a hollow copper tube. The copper tube has a strong connection, good plasticity and weldability, is easy to process and connect, and is easy to install. Hollow tubes of other materials can also be used, which will not be described here.

[0036] In this embodiment, Figure 6 As shown, when the carburetor is tilted to Figure 6 When the carburetor is tilted to the angle shown in FIG1 , the fuel in the float chamber 7 enters through the oil inlet channel II 302 and fills the oil channel IV 104. At this time, the fuel level is located at the connection point between the oil channel III 103 and the branch oil channel II 202. The fuel will not enter the oil channel II 102 connected to the balance hole 5 from the branch oil channel II 202, thereby preventing the carburetor from being tilted to the angle shown in FIG1 . Figure 6 At the tilt angle shown, fuel leaks from the balancing hole 5.

[0037] In this embodiment, Figure 7 As shown, when the carburetor is tilted to Figure 7At the tilt angle shown, the fuel in the float chamber 7 enters through the oil inlet channel I301 and fills the branch oil channel III203. At this time, the fuel level is located at the connection point between the oil channel I101 and the branch oil channel I201. The fuel will not enter the oil channel II102 connected to the balance hole 5 from the branch oil channel I201, thereby preventing the carburetor from being tilted to the position shown. Figure 7 At the tilt angle shown, fuel leaks from the balancing hole 5.

[0038] In this embodiment, Figure 8 As shown, when the carburetor is tilted to Figure 8 At the tilt angle shown, the fuel in the float chamber 7 enters the oil circuit IV104 through the oil inlet channel I301, but the fuel does not fill the oil circuit IV104. At this time, the fuel level is lower than the connection point between the oil circuit IV104 and the oil circuit III103, and the fuel level does not exceed the oil inlet channel I301. The fuel cannot enter the oil circuit I101, the oil circuit III103 and the oil circuit II102 connected to the balance hole 5, thereby preventing the carburetor from being tilted to the position shown. Figure 8 At the tilt angle shown, fuel leaks from the balancing hole 5.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A leak-proof carburetor, characterized by: The carburetor comprises a carburetor body, a float chamber, and a balancing hole. A storage oil passage is provided inside the carburetor body. The balancing hole is connected to the float chamber through the storage oil passage. The position where the balancing hole is connected to the storage oil passage is higher than the level of the fuel in the storage oil passage when the carburetor is tilted to a set angle. The carburetor further comprises an oil inlet passage I and an oil inlet passage II, wherein the oil inlet passage I and the oil inlet passage II are respectively arranged above the float chamber and communicated with the float chamber, and are used to transport the fuel in the float chamber to the storage oil circuit when the carburetor is tilted; The storage oil circuit includes a main oil circuit and a branch oil circuit, and the branch oil circuit is used to connect the main oil circuits adjacent to each other.

2. The leak-proof carburetor according to claim 1, characterized in that: The main oil circuit includes oil circuit I, oil circuit II and oil circuit III which are arranged transversely and parallel to each other. Oil circuit I, oil circuit II and oil circuit III all have set heights, with oil circuit III having the lowest set height and oil circuit II having the highest set height.

3. The leak-proof carburetor according to claim 1, characterized in that: The branch oil circuit includes branch oil circuit I and branch oil circuit II. The branch oil circuit I extends from the right end of oil circuit I to the right end of oil circuit II to connect oil circuit I and oil circuit II. The branch oil circuit II extends from the left end of oil circuit II to the left end of oil circuit III to connect oil circuit II and oil circuit III.

4. The leak-proof carburetor according to claim 1, characterized in that: The branch oil circuit also includes a branch oil circuit III arranged at the lower left of the oil circuit I. The oil inlet channel I extends upward and connects to the branch oil circuit III. The branch oil circuit III extends upward and connects to the left end of the branch oil circuit III.

5. The leak-proof carburetor according to claim 2, characterized in that: The oil circuit I is the shortest in length, and the oil circuit II is the longest in length. The oil circuit II is arranged above the oil circuit I and the oil circuit III.

6. The leak-proof carburetor according to claim 2, characterized in that: The balancing hole is arranged on the top of the carburetor body, and the balancing hole is connected with the left end of the oil circuit II through a connecting pipe, and the connecting pipe is L-shaped.

7. The leak-proof carburetor according to claim 2, characterized in that: The main oil circuit also includes an oil circuit IV which is orthogonally connected to the oil circuit III. The diameter of the oil circuit IV gradually decreases to a minimum diameter along the air intake direction of the carburetor body.

8. The leak-proof carburetor according to claim 7, characterized in that: The oil circuit IV is provided with an extension pipe at the minimum diameter, the outer diameter of the extension pipe is the same as the minimum diameter of the oil circuit IV, and the oil circuit IV is connected to the oil inlet channel II after and near the minimum diameter.

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