CN216588866U

CN216588866U - Diaphragm type carburetor suitable for high temperature state

Info

Publication number: CN216588866U
Application number: CN202123390396.XU
Authority: CN
Inventors: 陈其安; 贾永成
Original assignee: Zhejiang Ruixing Carburetor Manufacturing Co ltd
Current assignee: Zhejiang Ruixing Carburetor Manufacturing Co ltd
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2022-05-24
Anticipated expiration: 2031-12-24

Abstract

The utility model relates to a technical field of carburetor discloses a diaphragm formula carburetor suitable for under high temperature state, and the insulator of carburetor is equipped with the oil storage chamber in inside, and the upper part of the body of carburetor is kept away from to the metering system of carburetor, and the heat radiation that the engine during operation produced can't pass to insulator and metering system part, and the function of diaphragm pump and metering system on the well body just can not receive the influence, guarantees the normal work of engine. On the other hand, because the heat insulation body is internally provided with a large oil storage space, the fuel oil can transfer and transit through the oil storage cavity and take away the temperature in the oil storage cavity, so that the temperature of the fuel oil in the oil storage cavity is at a lower temperature, the performance of the engine is prevented from being influenced by air resistance generated by overheating of the metering system, and meanwhile, the metering system is ensured to have enough fuel oil for starting the engine.

Description

Diaphragm type carburetor suitable for high temperature state

Technical Field

The utility model relates to a technical field of carburetor especially relates to a diaphragm formula carburetor suitable for under high temperature state.

Background

The carburetor mixes a certain amount of fuel oil with air, and provides required mixed gas according to the requirements of the engine under various working conditions so as to ensure the engine to normally run. In the prior art diaphragm carburetor, if the engine is operated for a period of time under the condition of high temperature, the surface temperature of the carburetor rises, and at the moment, gasoline is evaporated when the engine is operated under the condition of high temperature, so that gasoline vapor is generated in the carburetor, air resistance is formed to influence the operation of the engine, and the engine has the problems of unstable operation, incapability of starting and the like.

In order to solve the problems, the middle body and the upper body are connected through an oil pipe to be separated so as to carry out heat transfer isolation in the prior art, but when the engine is started for the first time, the carburetor is not smoothly started due to lack of fuel or less stored fuel in the metering cavity, and the use of the engine is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a diaphragm formula carburetor suitable for under high temperature state to solve current carburetor when the engine is started for the first time, the problem that influences the use of engine because lack fuel or stock fuel less lead to the engine start unsmooth in the measurement intracavity.

In order to solve the problem, the utility model provides a diaphragm formula carburetor suitable for under high temperature state, including main part, diaphragm pump and measurement system, the main part is including the upper part of the body, insulator, the midbody and the lower part of the body that connect gradually, the upper part of the body is equipped with the mixing chamber with the intake-tube connection of engine, the insulator is made for the plastics material, just be equipped with the oil storage chamber in the insulator.

Further, the upper portion of oil storage chamber is connected with the balance pipe with the oilcan intercommunication, diaphragm pump and measurement system locate on the midbody, the diaphragm pump intercommunication the oilcan with the oil storage chamber with measurement system is used for with fuel pump in the oilcan extremely the oil storage chamber with measurement system, the midbody with be equipped with in the insulator with measurement system's fuel is carried extremely fuel passageway in the mixing chamber, the exit of fuel passageway be equipped with the main nozzle of mixing chamber intercommunication.

Further, still include into oil pipe, it connects to advance oil pipe the oilcan with between the diaphragm pump.

Furthermore, a first one-way valve is arranged between the diaphragm pump and the oil storage cavity, and the first one-way valve faces the opening and closing of the oil storage cavity.

Further, the midbody still is equipped with pulse chamber and pulse pipe, the diaphragm pump includes midbody gasket and pump oil diaphragm be equipped with first tongue piece and second tongue piece on the pump oil diaphragm.

Furthermore, the metering system comprises a metering cavity, a lower cover arranged at the lower end of the metering cavity, an oil absorption membrane positioned in the metering cavity, and a lower body sealing sheet arranged between the lower body and the middle body.

Further, the lower end of the upper body is provided with a communicating cavity communicated with the oil storage cavity, and the communicating cavity is communicated with the balance pipe.

Further, the lower end of the lower cover is provided with an oil pumping ball, and the oil pumping ball is connected with an oil can through an oil way.

Furthermore, a second one-way valve is arranged between the communication cavity and the balance pipe, and the second one-way valve is opened and closed towards the balance pipe.

The utility model provides a diaphragm formula carburetor suitable for under high temperature state, the upper part of the body is connected with the engine, the intake pipe butt joint of mixing chamber and engine, the heat radiation that the engine during operation produced can only transfer heat to the upper part of the body part of carburetor, and the insulator of carburetor adopts the relatively poor plastic material of heat transmissibility to make, and be equipped with the oil storage chamber in inside, the upper part of the body of carburetor is kept away from to the metering system of carburetor, the heat radiation that the engine during operation produced can't pass insulator and metering system part, just so diaphragm pump on the body in and metering system's function can not receive the influence, even make some radiation pass, the temperature also can not rise more than 60 ℃ and produce the normal work that the air resistance influences the engine. On the other hand, because the heat insulation body is internally provided with a large oil storage space, when the carburetor normally works, one part of fuel oil pumped by the diaphragm pump from the oil pot enters the metering system for combustion of the engine, the other part of redundant fuel oil enters the oil storage cavity, then flows into the oil pot of the engine through the oil storage cavity through the balance pipe, and the fuel oil is subjected to transfer transition circulation through the oil storage cavity and can also take away the temperature in the oil storage cavity, so that the temperature of the fuel oil in the oil storage cavity is at a lower temperature, the phenomenon that the metering system generates air resistance due to overheating to influence on the performance of the engine is avoided, and meanwhile, the metering system is ensured to have enough fuel oil for starting of the engine.

Drawings

Fig. 1 is a schematic structural view of a diaphragm carburetor according to a first embodiment of the present invention, which is adapted to be used in a high-temperature state.

Fig. 2 is a schematic structural diagram of another view angle of the diaphragm carburetor according to the first embodiment of the present invention, which is suitable for use in a high temperature state.

Fig. 3 is a schematic structural diagram of another view angle of the diaphragm carburetor according to the first embodiment of the present invention, which is suitable for use in a high temperature state.

Fig. 4 is a sectional view a-a of fig. 1.

Fig. 5 is a sectional view B-B of fig. 3.

Fig. 6 is a schematic view of the working oil passage according to the first embodiment.

Fig. 7 is a schematic structural view of another view angle of the diaphragm carburetor according to the second embodiment of the present invention, which is applied to a diaphragm carburetor at a high temperature.

Fig. 8 is a schematic structural view of a diaphragm carburetor according to a second embodiment of the present invention, which is adapted to be used in a high-temperature state.

Fig. 9 is a schematic structural view of the heat insulator according to the second embodiment.

Fig. 10 is a schematic diagram of the working oil passage of the second embodiment.

In the figure, 1, main body; 2. a diaphragm pump; 3. a metering system; 4. pumping an oil ball; 101. an upper body; 102. a thermal insulator; 103. a middle body; 104. a lower body; 105. an air inlet; 106. a mixing chamber; 107. an oil storage chamber; 108. a balance tube; 109. a fuel passage; 110. a main nozzle; 111. an oil inlet pipe; 112. a first check valve; 113. a pulse chamber; 114. a pulse tube; 115. a communicating cavity; 116. a second one-way valve; 201. a middle body sealing sheet; 202. an oil pumping diaphragm; 203. a first tongue piece; 204. a second tongue; 301. a metering chamber; 302. a lower cover; 303. an oil absorbing film; 304. the lower sealing sheet.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

The first embodiment is as follows:

referring to fig. 1 to 6, a diaphragm carburetor applicable to a high temperature state according to an embodiment of the present invention is schematically shown, which includes a main body 1, a diaphragm pump 2 and a metering system 3, it should be noted that the diaphragm pump 2 and the metering system 3 in this embodiment both employ the diaphragm pump 2 and the metering system 3 of the existing carburetor, the present embodiment does not relate to the improvement of the structure of the diaphragm pump 2 and the metering system 3, the main body 1 includes an upper body 101, a thermal insulator 102, a middle body 103 and a lower body 104, which are connected in sequence, the upper body 101, the thermal insulator 102, the middle body 103 and the lower body 104 are fixed together by screws to form a whole, oil supply generated by the diaphragm pump 2 and the metering system 3 is ejected from a main nozzle 110 through a fuel passage 109 to supply oil to the carburetor main body 1, the upper body 101 is provided with a mixing chamber 106 connected to an intake pipe of an engine and an air inlet 105 for air intake, the fuel and air are mixed in the mixing chamber 106 and supplied to the engine, preferably, the heat insulator 102 is made of plastic material, a fuel storage chamber 107 is arranged in the heat insulator 102, the upper part of the fuel storage chamber 107 is connected with a balance pipe 108 communicated with an oil can, the diaphragm pump 2 and the metering system 3 are arranged on the middle body 103, the diaphragm pump 2 is communicated with the oil can, the fuel storage chamber 107 and the metering system 3 and used for pumping the fuel in the oil can to the fuel storage chamber 107 and the metering system 3, a fuel passage 109 for conveying the fuel of the metering system 3 to the mixing chamber 106 is arranged in the middle body 103 and the heat insulator 102, and a main nozzle 110 communicated with the mixing chamber 106 is arranged at the outlet of the fuel passage 109.

Specifically, the upper body 101 is connected with an engine, the mixing chamber 106 is in butt joint with an air inlet pipe of the engine, heat radiation generated during the operation of the engine can only partially transfer heat to the upper body 101 of the carburetor, the heat insulator 102 of the carburetor is made of plastic materials with poor heat transfer performance, an oil storage cavity 107 is arranged in the heat insulator 102 of the carburetor, the metering system 3 of the carburetor is far away from the upper body 101 of the carburetor, heat radiation generated during the operation of the engine cannot be transferred to the heat insulator 102 and the metering system 3, therefore, the functions of the diaphragm pump 2 and the metering system 3 on the middle body 103 cannot be influenced, even if part of the heat radiation is transferred, the temperature cannot rise to be higher than 60 ℃ to generate air resistance to influence the normal operation of the engine. On the other hand, because the heat insulation body 102 has a large oil storage space, when the carburetor normally works, one part of fuel pumped by the diaphragm pump 2 from the oil pot enters the metering system 3 for combustion of the engine, the other part of redundant fuel enters the oil storage chamber 107 and then flows into the oil pot of the engine from the balance pipe 108 through the oil storage chamber 107, and the fuel can take away the temperature in the oil storage chamber 107 through the transition circulation of the oil storage chamber 107, so that the temperature of the fuel in the oil storage chamber 107 is at a lower temperature.

The diaphragm carburetor applicable to the high-temperature state in the embodiment further comprises an oil inlet pipe 111, wherein the oil inlet pipe 111 is connected between the oil can and the diaphragm pump 2, and fuel oil is pumped from the oil can into the metering system 3 and the oil storage cavity 107 through the oil inlet pipe 111 under the action of the diaphragm pump 2.

Further, as shown in fig. 5, a first check valve 112 is disposed between the diaphragm pump 2 and the oil storage chamber 107, the first check valve 112 opens and closes toward the oil storage chamber 107, and the first check valve 112 is disposed to ensure that fuel can only be delivered from the fuel inlet pipe 111 to the oil storage chamber 107 through the diaphragm pump 2, and cannot flow in the reverse direction, so as to ensure that fuel flows in the oil storage chamber 107 in a circulating manner, thereby achieving heat exchange with the oil storage chamber 107.

The middle body 103 in this embodiment is further provided with a pulse cavity 113 and a pulse tube 114, the diaphragm pump 2 comprises a middle body sealing sheet 201 and an oil pumping diaphragm 202, the oil pumping diaphragm 202 is provided with a first tongue 203 and a second tongue 204, and the metering system 3 comprises a metering cavity 301, a lower cover 302 covering the lower end of the metering cavity 301, an oil absorption diaphragm 303 located in the metering cavity 301, and a lower body sealing sheet 304 located between the lower body 104 and the middle body 103. The oil circuit during the specific work is as follows:

as shown in fig. 4, 5 and 6, when the engine is operated, the pulse generated on the engine is introduced into the pulse chamber 113 of the carburetor through the pulse pipe 114, the pumping diaphragm 202 in the pulse chamber 113 is pushed to move up and down, so that the first tongue 203 and the second tongue 204 are pushed to move alternately, thereby generating suction force to suck fuel from the oil pot and the fuel from the oil inlet pipe 111 along the oil path shown by a-b-c-d-e in fig. 7, a part of the fuel is sucked into the metering chamber 301 of the carburetor, the other part of the fuel enters the oil storage chamber 107 through the first one-way valve 112, the fuel in the metering chamber 301 is sprayed from the main nozzle 110 of the fuel passage 109 and the main nozzle 110, and is mixed with the air entering from the air inlet 105 into the mixing chamber 106 to flow into the engine from the mixing chamber 106 on the body, the engine is used for combustion to do work and output power outwards.

The lower end of the upper body 101 is provided with a communicating cavity 115 communicated with the oil storage cavity 107, the oil storage cavity 107 is communicated with the balance pipe 108 through the communicating cavity 115, so that redundant fuel oil in the oil storage cavity 107 can conveniently flow back to the oil pot, meanwhile, because the oil storage cavity 107 is filled with a part of fuel oil, and the oil pot of the carburetor is higher than the carburetor, before the engine works, the fuel oil is supplied into the oil storage chamber of the carburetor through the oil pot by self weight, so that the oil storage chamber is filled with the fuel oil, when the engine is started, the fuel oil can easily enter the metering chamber of the carburetor, and therefore, the engine is easy to start.

Example two:

referring to fig. 7 to 10, the present embodiment is different from the first embodiment in that an oil pumping ball 4 is disposed at the lower end of the lower cover 302, the oil pumping ball 4 is connected to an oil can through an oil path, a second check valve 116 is disposed between the communicating cavity 115 and the balance pipe 108, the second check valve 116 opens and closes toward the balance pipe 108, and the oil pumping ball 4 functions as: before the engine is started, the oil pumping ball 4 is squeezed by hands, vacuum suction is generated due to deformation of the oil pumping ball 4 during squeezing, fuel oil is sucked out of the oil can, the fuel oil enters from the oil inlet pipe 111 in a (or b) in fig. 10, passes through the metering cavities 301 of the oil ways 1 to c, d and e, then passes through the oil pumping balls 4 from f to g along the oil way 2, and finally returns to the oil can from the oil return pipe of g, the process that the fuel oil is sucked into the carburetor metering cavity 301 from the oil can before the engine is started is completed through the process, meanwhile, air in the carburetor metering cavity 301 is exhausted, the starting times of the engine are reduced, and the starting performance of the engine is improved; through the second one-way valve 116, when the oil pumping ball 4 is squeezed to perform oil pumping operation, the second one-way valve 116 closes and cuts off the passage between the communication cavity 115 and the balance pipe 108, so that smooth oil pumping from the oil can is ensured when the oil pumping ball 4 is squeezed.

It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, and these terms are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.

The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A diaphragm carburetor suitable for use in a high temperature state, comprising: including main part, diaphragm pump and measurement system, the main part is including the upper part of the body, insulator, midbody and the lower part of the body that connect gradually, the upper part of the body is equipped with the mixing chamber with the intake-tube connection of engine, be equipped with the oil storage chamber in the insulator.

2. A diaphragm carburetor according to claim 1, adapted for use at high temperatures, wherein: the upper portion of oil storage chamber is connected with the balance pipe with the oilcan intercommunication, diaphragm pump and measurement system locate on the midbody, the diaphragm pump intercommunication the oilcan with the oil storage chamber with measurement system is used for with fuel pump in the oilcan extremely the oil storage chamber with measurement system, the midbody with be equipped with in the insulator with measurement system's fuel is carried extremely fuel passageway in the mixing chamber, fuel passageway's exit be equipped with the main nozzle of mixing chamber intercommunication.

3. A diaphragm carburetor according to claim 2, adapted for use at high temperatures, wherein: the oil inlet pipe is connected between the oil can and the diaphragm pump.

4. A diaphragm carburetor according to claim 1, adapted for use at high temperatures, wherein: a first one-way valve is arranged between the diaphragm pump and the oil storage cavity, and the first one-way valve faces the opening and closing of the oil storage cavity.

5. A diaphragm carburetor according to claim 1, adapted for use at high temperatures, wherein: the middle body is also provided with a pulse cavity and a pulse tube, the diaphragm pump comprises a middle body sealing sheet and an oil pumping diaphragm, and a first tongue piece and a second tongue piece are arranged on the oil pumping diaphragm.

6. A diaphragm carburetor according to claim 1, adapted for use at high temperatures, wherein: the metering system comprises a metering cavity, a lower cover, an oil absorption membrane and a lower body sealing sheet, wherein the lower cover is arranged at the lower end of the metering cavity, the oil absorption membrane is positioned in the metering cavity, and the lower body sealing sheet is arranged between the lower body and the middle body.

7. A diaphragm carburetor according to claim 2, adapted for use at high temperatures, wherein: the lower end of the upper body is provided with a communicating cavity communicated with the oil storage cavity, and the communicating cavity is communicated with the balance pipe.

8. A diaphragm carburetor according to claim 6, adapted for use at high temperatures, wherein: the lower end of the lower cover is provided with an oil pumping ball, and the oil pumping ball is connected with an oil can through an oil way.

9. A diaphragm carburetor according to claim 7, adapted for use at high temperatures, wherein: and a second one-way valve is arranged between the communication cavity and the balance pipe and is opened and closed towards the balance pipe.