CN214424602U

CN214424602U - Diaphragm type carburetor suitable for high temperature state

Info

Publication number: CN214424602U
Application number: CN202022354892.9U
Authority: CN
Inventors: 陈其安; 贾永成
Original assignee: Zhejiang Rising Carburetor Manufacturing Co ltd
Current assignee: Zhejiang Ruixing Electromechanical Technology Co ltd
Priority date: 2020-09-07
Filing date: 2020-10-21
Publication date: 2021-10-19
Anticipated expiration: 2030-10-21
Also published as: CN112343738A

Abstract

The utility model relates to a diaphragm type carburetor suitable for high temperature state, which comprises an upper body, a middle body and a lower body (or a lower cover) of the carburetor, wherein the upper body, the middle body and the lower body (or the lower cover) are separately designed; the upper body is connected with the engine, the mixing chamber is butted with an air inlet pipe of the engine, the heat radiation generated when the engine works can only transmit heat to the upper body part of the carburetor, the middle body and the lower body (or the lower cover) part of the carburetor are far away from the upper body of the carburetor, and the heat radiation generated when the engine works can not be transmitted to the middle body and the lower body (or the lower cover), so that the functions of the diaphragm pumps and the metering systems on the middle body and the lower body can not be influenced, the temperature can not rise to more than 60 ℃ even if part of the heat radiation is transmitted, and the service life is longer; the oil pumping and metering system of the carburetor is independently formed into a component, is separated from the main body, and the separation distance is not limited. In addition, the lower body is additionally provided with the oil pumping ball, so that the starting times of the engine are reduced, and the starting performance of the engine is improved.

Description

Diaphragm type carburetor suitable for high temperature state

Technical Field

The utility model relates to a diaphragm formula carburetor particularly, relates to a diaphragm formula carburetor suitable for under the high temperature state.

Background

The carburetor is a very important accessory of the gasoline engine, is the heart of the engine, mixes a certain amount of fuel with air, and respectively provides required mixed gas according to the requirements of the engine under various working conditions so as to ensure the normal operation of the engine. At present, the types of carburetors on the market are various, and diaphragm carburetors and float carburetors are available, and butterfly valves, rotary valves and the like are available in the diaphragm carburetors.

In the prior art diaphragm carburetor, if the engine operates at a high temperature for a period of time, the surface temperature of the carburetor rises to above 60 ℃, and then gasoline evaporates when the engine operates at such a temperature, so that gasoline vapor is generated in the carburetor to form air resistance, the operation of the engine is influenced, and the engine is unstable in operation or cannot be started.

As shown in fig. 12, in the diaphragm carburetor according to the prior art, the carburetor is composed of an upper body (10), a middle body (20), a lower body (30), and the like. An oil pumping diaphragm (25) and a sealing gasket and other accessories are arranged between the upper body (10) and the middle body (20) to form a diaphragm pump (24) with an oil pumping function, and an oil absorbing diaphragm (34) and a sealing gasket and other accessories are arranged between the middle body (20) and the lower body (30) to form a metering system. The dashed boxes in fig. 12 indicate the parts of the diaphragm pump (24) and the metering system (33), respectively.

In the prior art diaphragm carburetor, an upper body (10), a middle body (20) and a lower body (30) (or a lower cover) of the carburetor are assembled together to form a whole, when the carburetor is installed on an engine, the temperature of the carburetor rises to be higher than 60 ℃ due to heat radiation generated during the operation of the engine, vapor generated by the evaporation of gasoline forms air resistance, and the gasoline vapor in a metering chamber are mixed together, so that the fuel supplied to the engine by the carburetor is changed, and the operation of the engine is unstable. Another problem is that the oil supply is not smooth because the oil pumping capability of the diaphragm pump is weakened by the high temperature.

FIG. 12 illustrates the following operation of a prior art diaphragm carburetor: when the engine works, the pulse generated on the engine is led into a pulse cavity (26) of the carburetor (figure B2) through a pulse hole, a pump membrane (32) in the pulse cavity (26) moves up and down to push a tongue piece A (241) and a tongue piece B (242) to move alternately, so that suction force is generated to suck fuel oil from an oil pot and the fuel oil is sucked into a metering cavity of the carburetor from an oil inlet pipe along oil paths of e2, f2, g2 and B2, then the fuel oil is sprayed out from a main nozzle (11) arranged on the body and mixed with air entering from an air inlet (14) to form mixed gas, and the mixed gas flows into the engine from a mixing chamber (12) on the body to be used for combustion work of the engine and output power outwards.

Disclosure of Invention

Based on the problem, the utility model provides a diaphragm formula carburetor suitable for under high temperature state aims at solving and heaies up and exceed 60 ℃, unable normal start, the pump oil ability weakens, the not smooth scheduling problem of fuel feeding. Therefore, the utility model adopts the following technical scheme.

The utility model discloses a diaphragm type carburetor suitable for under high temperature state, it includes upper part of the body, midbody, the lower part of the body (or lower cover) and the diaphragm pump of carburetor, is equipped with the mixing chamber in the upper part of the body, midbody and lower part of the body are independent design; the upper body is connected with the engine, the mixing chamber is in butt joint with an air inlet pipe of the engine, the heat radiation generated when the engine works can only transmit heat to the upper body part of the carburetor, the middle body and the lower body (or the lower cover) part of the carburetor are far away from the upper body of the carburetor, and the heat radiation generated when the engine works can not transmit to the middle body and the lower body (or the lower cover), so that the functions of the diaphragm pumps and the metering systems on the middle body and the lower body can not be influenced, and the temperature can not rise to more than 60 ℃ even if part of the heat radiation is transmitted.

Preferably, the middle body comprises a middle body upper cover, a middle body sealing sheet, an oil pumping membrane, a pulse cavity, a metering cavity and a pulse pipe.

In any of the above aspects, preferably, the diaphragm pump is composed of a middle body, a middle body upper cover, a middle body sealing sheet and a middle body diaphragm.

In any of the above schemes, preferably, the side of the middle body is provided with a metering system, the metering system is composed of the middle body, a lower body sealing sheet, an oil absorption membrane and a lower body, the oil pumping and metering system formed by the metering system is independently a component and separated from the main body, and the separation distance is not limited.

In any one of the above aspects, it is preferable that a main nozzle is provided at a middle portion of the upper body, the main nozzle being provided at a lower end of the plunger; the left side of the middle part of the upper body is provided with an air inlet, and the right side of the middle part of the upper body is provided with an air outlet; the lower end of the upper body is provided with a lower body cover.

In any of the above schemes, preferably, an oil inlet, an oil outlet and an oil passage are arranged between the upper body and the middle body.

In any of the above schemes, preferably, one side of the middle body is provided with an oil inlet pipe, and the upper end of the oil inlet pipe is provided with a filter screen.

In any of the above schemes, preferably, the top of the middle body is provided with an oil pumping diaphragm, and the oil pumping diaphragm is provided with a tongue piece A, a tongue piece B, a pumping film, a pulse cavity and a pulse tube; the bottom of the middle body is provided with a measuring cavity.

In any of the above aspects, preferably, a lower body sealing plate is arranged between the lower body and the middle body.

In any of the above solutions, it is preferable that the lower end of the lower body is provided with an oil pumping ball.

Drawings

These and other characteristic aspects and advantages of the present invention will now be described, as preferred but not limiting embodiments of the invention will become apparent, when the following detailed description is read with reference to the accompanying drawings, in which:

fig. 1 is a schematic diagram of a preferred embodiment of a diaphragm carburetor according to the present invention, adapted for use at high temperatures.

Fig. 2 is a top view of the preferred embodiment of fig. 1 adapted for use with a diaphragm carburetor according to the present invention in a high temperature condition.

Fig. 3 is a sectional view taken along the line a-a of the preferred embodiment of fig. 1, adapted for use with a diaphragm carburetor according to the present invention at elevated temperatures.

Fig. 4 is a sectional view of the preferred embodiment of fig. 1 taken along the line B-B, adapted for use with a diaphragm carburetor according to the present invention at elevated temperatures.

Fig. 5 is a partial cutaway view of the preferred embodiment of the pulse tube of fig. 2 adapted for use with a diaphragm carburetor according to the present invention at high temperatures.

Fig. 6 is a schematic diagram of the structural components of the preferred embodiment of the intermediate body of fig. 1 adapted for use in a diaphragm carburetor according to the present invention at high temperatures.

Fig. 7 is a partial cross-sectional view of the preferred embodiment of the centerbody of fig. 5 adapted for use with a diaphragm carburetor according to the present invention at elevated temperatures.

Fig. 8 is a cross-sectional view of another orientation of the preferred embodiment of fig. 5, adapted for use with a diaphragm carburetor according to the present invention in a high temperature condition.

Fig. 9 is a cross-sectional view of the preferred embodiment of fig. 5, in multiple orientations, for use with a diaphragm carburetor according to the present invention in a hot condition.

Fig. 10 is a schematic illustration of the working oil circuit of the preferred embodiment of fig. 1 adapted for use with a diaphragm carburetor according to the present invention at high temperatures.

Fig. 11 is a schematic view of another working oil circuit of the preferred embodiment of fig. 1 adapted for use with a diaphragm carburetor according to the present invention at high temperatures.

FIG. 12 is a schematic view of a prior art diaphragm carburetor.

Detailed Description

The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features.

Referring now to the drawings, FIGS. 1-10 depict schematic block diagrams of carburetors of the present invention. A diaphragm type carburetor suitable for a high-temperature state comprises an upper body 10, a middle body 20, a lower body 30 (or a lower cover) and a diaphragm pump 24 of the carburetor, wherein a mixing chamber 12 is arranged in the upper body 10, and the upper body 10, the middle body 20 and the lower body 30 are all independently designed; the upper body 10 is connected with the engine, the mixing chamber 12 is butted with an air inlet pipe of the engine, the heat radiation generated when the engine works can only transmit heat to the upper body 10 part of the carburetor, the middle body 20 and the lower body 30 (or the lower cover) part of the carburetor are far away from the upper body 10 of the carburetor, the heat radiation generated when the engine works can not transmit to the middle body 20 and the lower body 30 (or the lower cover), thus the functions of the diaphragm pump 24 and the metering system 33 on the middle body 20 and the lower body 30 can not be influenced, and the temperature can not rise to more than 60 ℃ even if part of the radiation is transmitted.

The upper body 10, the middle body 20 and the lower body 30 (or the lower cover) are separated, the middle body 20 and the lower body 30 (or the lower cover) are integrated to form a separated diaphragm pump and a metering system, and oil supply generated by the diaphragm pump and the metering system supplies oil to the carburetor main body through an oil passage.

In the present embodiment, the middle body 20 includes a middle body upper cover 22, a middle body sealing sheet 23, a diaphragm pump 24, an oil pumping diaphragm 25, a pulse chamber 26, a metering chamber 27 and a pulse tube 28 (see fig. 1-3).

In the present embodiment, the diaphragm pump 24 is composed of a middle body upper cover 22, a middle body sealing plate 23, and a pump oil diaphragm 25.

In this embodiment, a metering system 33 (shown in fig. 4) is disposed on the side of the middle body 20, and the metering system is composed of the middle body 20, the lower sealing sheet 31, the oil absorption membrane 34 and the lower body 30, so that the oil pumping and metering system is a single component and is separated from the main body, and the separation distance is not limited.

In the present embodiment, a main nozzle 11 is provided in the middle of the upper body 10, and is provided at the lower end of the plunger 15; an air inlet 14 is arranged at the left side of the middle part of the upper body 10; the right side of the middle part of the upper body 10 is provided with an air outlet 12; the lower end of the upper body 10 is provided with a lower body cover 13.

In the present embodiment, an oil inlet 16, an oil outlet 17 and an oil passage 18 are provided between the upper body 10 and the middle body 20.

In this embodiment, one side of the middle body 20 is provided with an oil inlet pipe 35 (see fig. 5 and 6), and the upper end of the oil inlet pipe is provided with a filter screen 21.

In this embodiment, the top of the middle body 20 is provided with an oil pumping diaphragm 25, and the oil pumping diaphragm 25 is provided with a tongue piece a241, a tongue piece B242 (shown in fig. 6 to 8), a pump membrane 32, a pulse cavity 26 and a pulse tube 28 (shown in fig. 5 to 7); the bottom of the middle body 20 is provided with a metering chamber 27 (shown in fig. 9).

In this embodiment, a lower sealing plate 31 is disposed between the lower body 30 and the middle body 20.

In this embodiment, the lower end of the lower body 30 is provided with an oil pumping ball 38 (see fig. 11).

Referring next to fig. 10, a schematic diagram of the working oil circuit of the preferred embodiment of fig. 1, adapted for use in a diaphragm carburetor at high temperatures, according to the present invention.

The utility model discloses a diaphragm formula carburetor during operation oil circuit as follows: when the engine works, the pulse generated on the engine is introduced into the pulse cavity 26 of the carburetor through the pulse pipe 28 of fig. 5, the pump membrane 32 in the pulse cavity 26 is pushed to move up and down, so that the tongue piece A241 and the tongue piece B242 are pushed to move alternately, thereby generating suction force to suck fuel oil from the oil pot, the fuel oil is sucked into the metering cavity 27 of the carburetor from the oil inlet pipe 35 along the oil paths shown in fig. B (B in fig. 10), fig. c (c in fig. 10), fig. d (d in fig. 10), fig. e (e in fig. 10) and fig. a (a in fig. 10), then the fuel oil enters the oil inlet 16 on the lower cover of the body from the oil outlet 17 through the oil passage 18, the fuel oil is sprayed from the main nozzle 11 arranged on the body and is mixed with air entering from the air inlet 14 to form a mixed gas, and the mixed gas flows into the engine from the mixing chamber 12 on the body to supply combustion work to the engine, and outputs power to the outside.

Referring finally to fig. 11, there is shown a schematic representation of another working oil circuit of the preferred embodiment of fig. 1 adapted for use in a diaphragm carburetor according to the present invention at high temperatures.

The oil pumping ball 37 is added on the working oil path 30, the oil path 2 for returning the fuel oil from the metering cavity to the oil can is added on the lower body, and the oil pumping ball has the functions of: when the engine is started, the pump oil ball 37 is pressed by hand, the vacuum suction force is generated due to the deformation of the pump oil ball 37 during pressing, the fuel oil is sucked out of the oil pot, the fuel oil enters from the oil inlet pipe 35 in a1 (or b1) (a 1 in fig. 11), passes through the oil passage 1 to the pump oil ball 37 in fig. c1 (c 1 in fig. 11), d1 (d 1 in fig. 11) and e1 (e 1 in fig. 11), then passes through the oil passage 2 to the pump oil ball 37 in fig. f1 to g1 (g 1 in fig. 11), and finally returns to the oil pot from the oil return pipe 36 in fig. g1 (g 1 in fig. 11), the process of sucking the fuel oil from the oil pot to the carburetor metering cavity 27 before the engine is started is completed, and the air in the carburetor metering cavity 27 is also discharged, so that the number of starting times of the engine is reduced, and the starting performance of the engine is improved.

Although the present invention has been disclosed in detail with reference to the accompanying drawings, it is to be understood that such description is merely illustrative and not restrictive of the application of the present invention. The scope of the invention is defined by the appended claims and may include various modifications, adaptations and equivalents of the invention without departing from its scope and spirit.

Claims

1. The utility model provides a diaphragm formula carburetor suitable for under high temperature state, its includes upper part of the body (10) of carburetor, well body (20), lower part of the body (30) and diaphragm pump (24), is equipped with mixing chamber (12) in upper part of the body (10), its characterized in that: the upper body (10), the middle body (20) and the lower body (30) are all independently designed; the upper body (10) is connected with an engine, and the mixing chamber (12) is butted with an air inlet pipe of the engine.

2. A diaphragm carburetor according to claim 1, adapted for use at high temperatures, wherein: the middle body (20) comprises a middle body upper cover (22), a middle body sealing sheet (23), an oil pumping membrane (25), a pulse cavity (26), a metering cavity (27) and a pulse pipe (28).

3. A diaphragm carburetor according to claim 1, adapted for use at high temperatures, wherein: the diaphragm pump (24) consists of a middle body (20), a middle body upper cover (22), a middle body sealing sheet (23) and an oil pumping diaphragm (25).

4. A diaphragm carburetor according to claim 1 or 2, adapted for use at high temperatures, wherein: the side of the middle body (20) is provided with a metering system (33) which consists of the middle body (20), a lower body sealing sheet (31), an oil absorption membrane (34) and a lower body (30).

5. A diaphragm carburetor according to claim 1 or 2, adapted for use at high temperatures, wherein: a main nozzle (11) is arranged in the middle of the upper body (10) and is arranged at the lower end of the plunger (15); an air inlet (14) is formed in the left side of the middle part of the upper body (10); the lower end of the upper body (10) is provided with a lower body cover (13).

6. A diaphragm carburetor according to claim 1 or 2, adapted for use at high temperatures, wherein: an oil inlet (16), an oil outlet (17) and an oil passage (18) are arranged between the upper body (10) and the middle body (20).

7. A diaphragm carburetor according to claim 1 or 2, adapted for use at high temperatures, wherein: one side of the middle body (20) is provided with an oil inlet pipe (35), and the upper end of the oil inlet pipe is provided with a filter screen (21).

8. A diaphragm carburetor according to claim 1 or 2, adapted for use at high temperatures, wherein: the top of the middle body (20) is provided with an oil pumping diaphragm (25), and the oil pumping diaphragm (25) is provided with a tongue piece A (241), a tongue piece B (242), a pumping film (32), a pulse cavity (26) and a pulse tube (28); the bottom of the middle body (20) is provided with a metering cavity (27).

9. A diaphragm carburetor according to claim 1 or 2, adapted for use at high temperatures, wherein: a lower sealing sheet (31) is arranged between the lower body (30) and the middle body (20).

10. A diaphragm carburetor according to claim 1 or 2, adapted for use at high temperatures, wherein: the lower end of the lower body (30) is provided with an oil pumping ball (38).