CN216788565U

CN216788565U - Rotary valve type carburetor

Info

Publication number: CN216788565U
Application number: CN202220181519.4U
Authority: CN
Inventors: 陈献祥
Original assignee: Jiangmen Hualian Industry Co ltd
Current assignee: Jiangmen Hualian Industry Co ltd
Priority date: 2022-01-21
Filing date: 2022-01-21
Publication date: 2022-06-21
Anticipated expiration: 2032-01-21

Abstract

The utility model discloses a rotary valve type carburetor, comprising: the body part is provided with a cavity, the cavity is provided with a first air inlet, a first air outlet, a second air inlet and a second air outlet, the rotary valve part comprises a rotary valve and a rotary mechanism, the rotary valve is installed in the cavity and provided with a mixed gas cavity and a scavenging cavity, the rotary mechanism can drive the rotary valve to rotate, the mixed gas cavity is communicated with the second air inlet and the second air outlet, the rotary valve is provided with an avoiding channel which is used for communicating the mixed gas cavity with the scavenging cavity in the vertical direction, an oil needle is arranged in the rotary valve and sequentially passes through the mixed gas cavity, the avoiding channel and the scavenging cavity, an oil injector is sleeved at one end of the oil needle and is positioned in the mixed gas cavity, a sealing rubber gasket is arranged in the avoiding channel, the sealing rubber gasket is provided with an avoiding through hole which is used for avoiding the oil needle, and fresh air can be introduced into a two-stroke engine, the exhaust gas in the two-stroke engine is cleaned.

Description

Rotary valve type carburetor

Technical Field

The utility model relates to the technical field of engine accessories, in particular to a rotary valve type carburetor.

Background

The rotary valve type carburetor is usually provided with a mixed gas cavity, gasoline and air are mixed in the mixed gas cavity and then are introduced into the two-stroke engine, and the two-stroke engine needs to be introduced with gas to scavenge and remove waste gas in an exhaust stage. The existing rotary valve type carburetor usually uses the mixed gas in the mixed gas chamber to execute the scavenging process of the two-stroke engine, the waste gas in the two-stroke engine can not be cleaned, and the combustion performance of fuel is influenced during the power stroke.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. The utility model provides a carburetor, which can clean the exhaust gas in a two-stroke engine.

A rotary valve carburetor according to an embodiment of the present invention includes: the body component is provided with a cavity, and the cavity is provided with a first air inlet hole, a first air outlet hole, a second air inlet hole and a second air outlet hole; a rotary valve component comprising a rotary valve and a rotary mechanism, wherein the rotary valve is arranged in the cavity and is provided with a mixed gas cavity and a scavenging cavity, the rotary mechanism can drive the rotary valve to rotate so as to enable the scavenging cavity to be communicated with the first air inlet and the first air outlet and to enable the mixed gas cavity to be communicated with the second air inlet and the second air outlet, the rotary valve is provided with an avoiding channel communicated with the mixed gas cavity and the scavenging cavity along the vertical direction, an oil needle is arranged in the rotary valve and sequentially passes through the mixed gas cavity, the avoiding channel and the scavenging cavity, one end of the oil needle is sleeved with an oil injector, the oil injector is positioned in the mixed gas cavity, a sealing rubber gasket is arranged in the avoiding channel to isolate the mixed gas cavity and the scavenging cavity, the sealing rubber mat is provided with an avoidance through hole for avoiding the oil needle.

The rotary valve type carburetor provided by the embodiment of the utility model has the following beneficial effects: when two-stroke engine carried out the scavenging flow, fresh air let in two-stroke engine through scavenging chamber room in, can clear away the waste gas in the two-stroke engine totally, avoided influencing the combustion performance of fuel, and isolated by sealed cushion between mist chamber and the scavenging chamber room, the effect of cleaing away of assurance waste gas in the unable entering scavenging chamber of mist in the mist chamber.

According to some embodiments of the utility model, the escape passage is cylindrical in shape.

According to some embodiments of the utility model, the diameter of the escape passage is less than or equal to 3 mm and greater than or equal to 1.5 mm.

According to some embodiments of the present invention, the rotary valve includes a first cylinder and a second cylinder, the first cylinder and the second cylinder are arranged along a vertical direction, a lower end surface of the first cylinder is fixedly connected with an upper end surface of the second cylinder, the scavenging chamber and the mixed gas chamber are both in a cylinder structure, the scavenging chamber is horizontally arranged in the first cylinder, the mixed gas chamber is horizontally arranged in the first cylinder, and central axes of the mixed gas chamber and the scavenging chamber are parallel to each other.

According to some embodiments of the utility model, the second air inlet hole and the second air outlet hole are cylindrical in shape, and the diameter of the mixture chamber is smaller than the diameter of the second air inlet hole and the second air outlet hole to form a venturi shape.

According to some embodiments of the utility model, the outer wall of the fuel injector is provided with a fuel injection nozzle, the fuel injector needle extends into the fuel injector to shield the fuel injection nozzle, the fuel injector needle is capable of moving along an axial direction, and the fuel injection nozzle is provided with a sharp-angled end which is located at one end far away from the fuel injector needle.

According to some embodiments of the utility model, the rotating mechanism comprises a valve rod, a rotating cover and a valve cover, the bottom of the valve rod is screwed to the top of the rotating valve, the valve cover is covered on the top of the rotating valve, a first through hole is formed in the middle of the valve cover, the valve rod penetrates through the first through hole, the rotating cover is covered on the top of the valve cover, a positioning section is formed in the top of the valve rod, a second through hole matched with the positioning section is formed in the middle of the rotating cover, and a nut is screwed on the top of the valve rod.

According to some embodiments of the utility model, a dust cap is provided between the valve cover and the rotary cover, the dust cap being fitted over the valve stem.

According to some embodiments of the utility model, the top of the valve cover is provided with a limiting part, and the bottom of the rotary cover is circumferentially provided with a limiting groove capable of accommodating the limiting part so as to limit the rotary stroke of the rotary cover.

According to some embodiments of the utility model, the rotary cover is provided with an extension, the valve cover is provided with a boss, the boss is screwed with an adjusting screw, the adjusting screw is horizontally arranged, and the adjusting screw abuts against the extension so that the adjusting screw can adjust the initial rotation amplitude of the rotary valve.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The utility model is further described with reference to the following figures and examples, in which:

FIG. 1 is a cross-sectional view of a rotary valve carburetor of an embodiment of the present invention;

FIG. 2 is an exploded view of a rotary valve member according to some embodiments of the present invention;

FIG. 3 is a schematic structural view of a spin cover according to some embodiments of the present invention;

FIG. 4 is a schematic structural view of a valve cover according to some embodiments of the present invention;

FIG. 5 is a schematic diagram of a rotary valve according to some embodiments of the present invention;

FIG. 6 is a schematic diagram of a fuel injector according to some embodiments of the utility model.

Reference numerals:

a rotary valve carburetor 1000;

a body member 100, a first inlet hole 110, a first outlet hole 120, a second inlet hole 130, a second outlet hole 140;

the rotary valve component 200, the rotary valve 210, the first cylinder 211, the second cylinder 212, the scavenging chamber 211a, the mixed gas chamber 212a, the avoiding channel 213, the sealing rubber pad 213a, the rotary mechanism 220, the valve rod 221, the limiting section 221a, the rotary cover 222, the limiting groove 222a, the second through hole 222b, the extension 222c, the valve cover 223, the limiting part 223a, the first through hole 223b, the bulge 223c, the adjusting screw 223c1, the reinforcing rib 223d, the nut 224 and the dust cap 225;

oil needle 300, oil injector 310 and triangular oil nozzle 311.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to, for example, the upper, lower, inner, outer, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, if there are first and second described only for the purpose of distinguishing technical features, it is not understood that relative importance is indicated or implied or that the number of indicated technical features or the precedence of the indicated technical features is implicitly indicated or implied.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1, a rotary valve type carburetor 1000 according to an embodiment of the present invention includes a body member 100, a cavity is provided in the body member 100, the cavity is opened with a first air inlet hole 110, a first air outlet hole 120, a second air inlet hole 130, and a second air outlet hole 140, a rotary valve member 200 is installed in the cavity, a mixture chamber 212a and a scavenging chamber 211a are provided in the rotary valve member 200, the mixture chamber 212a and the scavenging chamber 211a are arranged in a vertical direction, the mixture chamber 212a can communicate with the first air inlet hole 110 and the first air outlet hole 120, the scavenging chamber 211a can communicate with the second air inlet hole 130 and the second air outlet hole 140, an oil injector 310 is provided in the mixture chamber 212a, the oil injector 310 can inject gasoline to mix with air to form a mixture, when a two-stroke engine is in a compression stage, the air enters the mixture chamber 212a through the first air inlet hole 110, the fuel injector 310 injects gasoline, and air and gasoline are mixed and then introduced into the two-stroke engine through the first air outlet hole 120, so that the normal operation of the two-stroke engine is ensured; when the two-stroke engine is in a scavenging stage, fresh air is introduced into the scavenging chamber 211a through the second air inlet hole 130 and enters the two-stroke engine through the second air outlet hole 140 to scavenge the two-stroke engine, the fresh air can clear away waste gas in the two-stroke engine, the combustion performance of fuel is prevented from being influenced, the waste gas discharged by the two-stroke engine can be diluted, the waste gas pollution is reduced, and the environment is protected.

Specifically, referring to fig. 1 and 2, the rotary valve member 200 includes a rotary valve 210 and a rotary mechanism 220, the rotary mechanism 220 can drive the rotary valve 210 to rotate, so that the air mixture chamber 212a can be communicated with the first air inlet 110 and the first air outlet 120, and simultaneously the air scavenging chamber 211a can be communicated with the second air inlet 130 and the second air outlet 140, the rotary valve 210 is installed in a cavity, the cavity is hermetically connected with the rotary valve 210 to avoid air leakage, the air mixture chamber 212a and the air scavenging chamber 211a are disposed in the rotary valve 210, the rotary valve 210 is vertically provided with an escape channel 213 communicating the air mixture chamber 212a and the air scavenging chamber 211a, an oil needle 300 is disposed in the rotary valve 210, the oil needle 300 sequentially passes through the air mixture chamber 212a, the escape channel 213 and the air scavenging chamber 211a, one end of the oil needle 300 is sleeved with an oil injector 310, the oil injector 310 is located in the air mixture chamber 212a, the fuel injector 310 is used for spraying gasoline to form mixed gas by mixing with air, a sealing rubber pad 213a is arranged in the avoidance channel 213, the sealing rubber pad 213a isolates the mixed gas chamber 212a and the scavenging cavity 211a, sealing is achieved, mixed gas in the mixed gas chamber 212a is prevented from flowing into the scavenging cavity 211a, the effect of removing waste gas and the effect of diluting waste gas are affected, the sealing rubber pad 213a is further provided with an avoidance through hole for avoiding the oil needle 300, and the oil needle 300 penetrates through the avoidance through hole to ensure the normal installation and use of the oil needle 300.

Referring to fig. 1 and 5, according to some embodiments of the present invention, the avoiding channel 213 has a cylindrical shape, which facilitates manufacturing, and the cylindrical shape can make the sealing rubber pad 213a fit well with the inner wall surface of the avoiding channel 213, thereby enhancing the sealing effect of the sealing rubber pad 213 a.

According to some embodiments of the present invention, the diameter of the oil needle 300 is generally less than 1.5 mm, and the diameter of the avoiding channel 213 is less than or equal to 3 mm and greater than or equal to 1.5 mm, which is preferable, and the diameter of the avoiding channel 213 is smaller without affecting the installation of the oil needle 300, so as to reduce the situation that the mixed gas flow in the mixed gas chamber 212a flows into the scavenging chamber 211a from the gap of the sealing rubber pad 213 a.

Referring to fig. 5, according to some embodiments of the present invention, the rotary valve 210 includes a first cylinder 211 and a second cylinder 212, the first cylinder 211 and the second cylinder 212 are disposed along a vertical direction, a lower end surface of the first cylinder 211 is fixedly connected to an upper end surface of the second cylinder 212, the scavenging chamber 211a and the mixed gas chamber 212a are both in a cylinder structure, the scavenging chamber 211a is horizontally disposed in the first cylinder 211, the mixed gas chamber 212a is horizontally disposed in the first cylinder 211, and central axes of the mixed gas chamber 212a and the scavenging chamber 211a are parallel to each other.

Referring to fig. 1 and 5, according to some embodiments of the present invention, the second inlet hole 130, the second outlet hole 140, and the mixture chamber 212a are cylindrical, and the diameter of the mixture chamber 212a is larger than the diameters of the second inlet hole 130 and the second outlet hole 140 to form a venturi shape, so that gasoline sprayed from the injector 310 can be atomized, thereby enhancing a mixing effect of gasoline and air and increasing a utilization rate of gasoline. It should be noted that the venturi tube is a tube, the cross-sectional area of the tube changes from large to small and then from small to large, when the airflow passes through a position with a small cross-sectional area, the flow velocity of the airflow increases and the pressure intensity decreases, so that the gasoline can be atomized, the gasoline and the air can be conveniently mixed, and the utilization rate is improved.

Referring to fig. 6, according to some embodiments of the present invention, an oil nozzle is disposed on an outer wall of an oil injector 310, an oil needle 300 extends into the oil injector 310 to shield the oil nozzle, the oil needle 300 can move along an axial direction, the oil nozzle has a pointed end, the pointed end is located at an end far away from the oil needle 300, and when the oil needle 300 moves upward, the pointed end of the oil nozzle is exposed first, so that an amount of oil sprayed by the oil nozzle is gradually increased, a speed is moderate, and power of an engine is more gentle.

Referring to fig. 2 to 4, according to some embodiments of the present invention, the rotating mechanism 220 includes a valve rod 221, a rotating cover 222, and a valve cover 223, the bottom of the valve rod 221 is screwed to the top of the rotating valve 210, the valve cover 223 covers the top of the rotating valve 210, a first through hole 223b is formed in the middle of the valve cover 223, the valve rod 221 passes through the first through hole 223b, one end of the oil needle 300 passes through the valve rod 221, the valve cover 223 plays a sealing role, the rotating cover 222 covers the top of the valve cover 223, a positioning section is formed at the top of the valve rod 221, a second through hole 222b matched with the positioning section is formed in the middle of the rotating cover 222, the rotating cover 222 can drive the valve rod 221 to rotate, so as to indirectly drive the rotating valve 210 to rotate, and a nut 224 is further screwed to the top of the valve rod 221, so as to fix the rotating cover 222.

Referring to fig. 2, according to some embodiments of the present invention, a dust cap 225 is disposed between the valve cover 223 and the rotary cover 222, the dust cap 225 is sleeved on the valve rod 221, the dust cap 225 is connected in a sealing manner, and when the valve rod 221 rotates, the dust cap 225 can always maintain a sealing gap, which can achieve a dust-proof effect.

Referring to fig. 2 to 4, according to some embodiments of the present invention, the top of the valve cap 223 is provided with a limiting portion 223a, the bottom of the rotating cap 222 is circumferentially provided with a limiting groove 222a capable of accommodating the limiting portion 223a, and when the rotating cap 222 exceeds the rotating stroke, the limiting groove 222a abuts against the limiting portion 223a to limit the rotating stroke of the rotating cap 222, so as to prevent the rotating cap 222 from rotating freely and exceeding the maximum rotating stroke, and thus, the protecting function can be achieved.

Referring to fig. 2 to 4, according to some embodiments of the present invention, the rotary cover 222 is provided with an extension portion 222c, the valve cover 223 is provided with a protrusion portion 223c, the protrusion portion 223c is screwed with an adjusting screw 223c1, the adjusting screw 223c1 is horizontally arranged, the adjusting screw 223c1 can adjust the screwing amount, and the adjusting screw 223c1 abuts against the extension portion 222c of the rotary cover 222, so that the adjusting screw 223c1 can adjust the initial rotation amplitude of the rotary valve 210, and further, the air intake amount of the rotary valve type carburetor 1000 is controlled.

The embodiments of the present invention are described in detail above with reference to the accompanying drawings, and finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rotary valve carburetor, comprising:

the body part is provided with a cavity, and the cavity is provided with a first air inlet hole, a first air outlet hole, a second air inlet hole and a second air outlet hole;

a rotary valve component comprising a rotary valve and a rotary mechanism, wherein the rotary valve is arranged in the cavity and is provided with a mixed gas cavity and a scavenging cavity, the rotary mechanism can drive the rotary valve to rotate so as to enable the scavenging cavity to be communicated with the first air inlet and the first air outlet and to enable the mixed gas cavity to be communicated with the second air inlet and the second air outlet, the rotary valve is provided with an avoiding channel communicated with the mixed gas cavity and the scavenging cavity along the vertical direction, an oil needle is arranged in the rotary valve and sequentially passes through the mixed gas cavity, the avoiding channel and the scavenging cavity, one end of the oil needle is sleeved with an oil injector, the oil injector is positioned in the mixed gas cavity, a sealing rubber gasket is arranged in the avoiding channel to isolate the mixed gas cavity and the scavenging cavity, the sealing rubber mat is provided with an avoidance through hole for avoiding the oil needle.

2. A rotary valve carburetor according to claim 1, wherein the bypass passage is cylindrical in shape.

3. A rotary valve carburetor according to claim 2, wherein the bypass passage has a diameter of 3 mm or less and 1.5 mm or more.

4. A rotary valve carburetor according to claim 1, wherein the rotary valve includes a first cylinder and a second cylinder, the first cylinder and the second cylinder are vertically disposed, a lower end surface of the first cylinder is fixedly connected to an upper end surface of the second cylinder, the scavenging chamber and the mixture chamber are both in a cylindrical configuration, the scavenging chamber is horizontally disposed in the first cylinder, the mixture chamber is horizontally disposed in the first cylinder, and central axes of the mixture chamber and the scavenging chamber are parallel to each other.

5. A rotary valve carburetor according to claim 4, wherein the second inlet port and the second outlet port are cylindrical in shape, and the mixture chamber has a diameter smaller than the diameter of the second inlet port and the second outlet port to form a venturi shape.

6. A rotary valve carburettor according to claim 1 wherein the fuel injector has a fuel injector nozzle formed in an outer wall thereof, the fuel injector needle extending into the fuel injector to shield the fuel injector nozzle, the fuel injector needle being axially movable, the fuel injector nozzle having a pointed end at an end remote from the fuel injector needle.

7. The rotary valve type carburetor according to claim 1, wherein the rotary mechanism includes a valve stem, a rotary cover, and a valve cover, wherein a bottom of the valve stem is screwed to a top of the rotary valve, the valve cover is provided on the top of the rotary valve, a first through hole is provided in a middle portion of the valve cover, the valve stem passes through the first through hole, the rotary cover is provided on a top portion of the valve cover, a positioning section is provided on the top portion of the valve stem, a second through hole matching with the positioning section is provided in the middle portion of the rotary cover, and a nut is screwed to the top portion of the valve stem.

8. A rotary valve carburettor according to claim 7 wherein a dust cap is provided between the valve cover and the rotary cover, the dust cap being fitted over the valve stem.

9. A rotary valve carburetor according to claim 7, wherein the top of the valve cover is provided with a stopper portion, and the bottom of the rotary cover is provided with a stopper groove capable of receiving the stopper portion in the circumferential direction so as to limit the rotational stroke of the rotary cover.

10. A rotary valve carburetor according to claim 7, wherein the rotary cover is provided with an extension portion, the valve cover is provided with a boss portion, the boss portion is screwed with an adjustment screw, the adjustment screw is horizontally disposed, and the adjustment screw abuts against the extension portion so that the adjustment screw can adjust an initial rotation range of the rotary valve.