CN209925123U

CN209925123U - Gas carburetor

Info

Publication number: CN209925123U
Application number: CN201920869461.0U
Authority: CN
Inventors: 夏品清
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-06-11
Filing date: 2019-06-11
Publication date: 2020-01-10
Anticipated expiration: 2029-06-11

Abstract

The utility model relates to a gas carburetor, which comprises a carburetor shell and a control valve shell which are buckled into a whole from top to bottom, wherein a first boss is arranged beside the carburetor shell, a gas supply channel and a gas inlet channel are arranged in the first boss, a gas nozzle is arranged at the inner end of the gas inlet channel, and the outer end of the gas inlet channel is blocked; the carburetor shell is also internally provided with an idle air supply channel, the input end of the idle air supply channel is communicated with the gas nozzle, the output end of the idle air supply channel is communicated with the downstream mixing chamber, the output end of the idle air supply channel is provided with an adjusting screw for adjusting the opening degree of the idle air supply channel, and the upstream position close to the output end of the idle air supply channel is also provided with a transition hole which is communicated with the mixing. The gas outlet on the control valve shell leads to the second boss beside the control valve shell, the first boss and the second boss correspond to each other, the gas outlet channel of the second boss is communicated with the gas supply channel in the first boss, and the gas carburetor integrates the gas supply channel in the carburetor shell and the control valve shell, so that the structure is more compact, the size is smaller, and the reliability is higher.

Description

Gas carburetor

Technical Field

The utility model relates to a carburetor technical field, concretely relates to gas carburetor of pure gas type.

Background

A carburetor is a gas mixing device that mixes fuel and air to form a mixed gas and supplies the mixed gas to an engine. Most of existing carburettors are dual-purpose carburettors of oil and gas, for example, a dual-fuel auto-switching carburetor (with the publication number of 108331680 a) developed by the inventor firstly comprises a carburetor body and a dual-fuel auto-switching bottom cup, wherein the dual-fuel auto-switching bottom cup comprises a shell, the shell is sequentially provided with a needle valve component, a needle valve driving component and a fuel gas control component from top to bottom, a mandril of the needle valve driving component directly pushes an oil separation diaphragm and a needle valve of the needle valve component, and the needle valve is arranged on an oil supply channel so as to automatically control the on-off of the oil supply channel; and a gas outlet interface on the shell is connected to a gas inlet on the carburetor body through a connecting pipe.

However, in actual demand, not all customers require dual-purpose carburetors. For some portable tools like lawn mowers, the pure gas is used for providing power for the engine, so that the power mechanism of the portable tools is simplified, the size of a power assembly of the portable tools is reduced, and the portability of the portable tools is improved. Therefore, the dual-purpose carburetor for oil and gas needs to be simplified, so that the carburetor is more compact in structure, smaller in size, higher in reliability and more suitable for a pure gas type engine.

SUMMERY OF THE UTILITY MODEL

Based on above-mentioned prior art not enough, the utility model provides a gas carburetor, this gas carburetor make it lock into wholly about can through simplifying and improvement carburetor casing and control valve casing to with the gas air feed channel integration in carburetor casing and control valve casing, its structure is compacter, the volume is littleer, the reliability is stronger, more is applicable to the engine use of pure gas type.

In order to achieve the purpose of the invention, the technical scheme of the utility model is as follows: a gas carburetor comprises a carburetor shell and a control valve shell which are buckled into a whole up and down;

the carburetor comprises a carburetor shell, a carburetor body, a carburetor nozzle, a carburetor shaft, a carburetor cover, a carburetor spring; the carburetor shell is also internally and longitudinally provided with an idle air supply channel, namely an auxiliary air channel of the carburetor shell, the input end of the idle air supply channel is communicated with a gas nozzle, the output end of the idle air supply channel is communicated with a downstream mixing chamber, usually the mixing chamber positioned downstream of a throttle valve, the output end of the idle air supply channel is provided with an adjusting screw for adjusting the opening degree of the idle air supply channel, the upstream position close to the output end of the idle air supply channel is also provided with a transition hole, and the transition hole is communicated with the mixing chamber, usually the mixing chamber positioned upstream of the throttle valve;

the cavity between the control valve shell and the carburetor shell forms a fuel gas control air chamber;

the control valve shell is provided with a gas inlet and a gas outlet, the gas outlet is communicated with a second boss beside the control valve shell, the second boss and the first boss are matched with each other correspondingly, a gas outlet channel is arranged in the second boss, and the gas outlet channel is communicated with a gas supply channel in the first boss; and an air inlet control mechanism is arranged in the control valve shell.

Preferably, a copper pipe fitting penetrates through the gas inlet channel, the front end (inner end) of the copper pipe fitting is a gas nozzle, and the rear end (outer end) of the copper pipe fitting is plugged at the rear end of the gas inlet channel; a first gas supply through hole communicated with the gas supply channel is arranged at a position close to the rear end of the copper pipe fitting, and the first gas supply through hole is drilled by a drill bit penetrating through the gas supply channel after the copper pipe fitting is arranged in the gas supply channel; and a second air supply through hole communicated with the no-load air supply channel is arranged at a position close to the front end of the copper pipe fitting, the second air supply through hole is drilled through a drill bit after the copper pipe fitting is arranged in the fuel gas inlet channel, and the second air supply through hole is plugged by a copper ball generally after the second air supply through hole is drilled.

Preferably, there are several transition holes. The carburetor shell is transversely provided with a transition hole machining process hole, the diameter of the transition hole machining process hole is larger than that of the transition hole, and after the transition hole is machined, the outer end of the transition hole machining process hole is blocked.

Preferably, an atmosphere balance through hole is further formed beside the bottom of the carburetor shell.

Preferably, the control mechanism admits air includes rocker arm support, rocking arm, air inlet end cap, rocking arm reset spring and elastic diaphragm, the rocker arm middle part is erect at the rocker arm support, the air inlet end cap is installed to the one end of rocking arm, the other end and the elastic diaphragm middle part of rocking arm are connected, just the rocking arm still disposes rocking arm reset spring to under the normal state, the air inlet end cap can the shutoff be located the gas air inlet of control valve casing on.

Preferably, the fitting surface of the second boss and the first boss which are matched with each other is provided with a mounting sink groove for mounting the sealing ring.

Compared with the prior art, the fuel gas carburetor is characterized in that the carburetor shell and the control valve shell are simplified and improved, so that the fuel gas carburetor can be buckled into a whole up and down, and a fuel gas supply channel is integrated in the carburetor shell and the control valve shell, so that the fuel gas carburetor is more compact in structure, smaller in size and stronger in reliability. In addition, an idle air supply channel is additionally arranged in the carburetor shell, so that the optimal mixing ratio of six working points of the engine when gas is used is ensured. When the engine is in the no-load working condition, the output end gas supply of the no-load gas supply channel guarantees that under the no-load working condition, the excellent performance of the engine can effectively reduce the emission of harmful substances and is more environment-friendly, when the engine is from the no-load working condition to the load working condition, the gas supply is assisted through the transition holes, the excellent performance in the transition conversion process is guaranteed, the coordination of the gas supply is guaranteed, the gas can be more fully utilized, and the generation of harmful gas is reduced.

Drawings

Fig. 1 is a front view of a gas carburetor.

FIG. 2 is a front view of the carburetor housing.

Fig. 3 is a cross-sectional view a-a of fig. 2.

Fig. 4 is a schematic perspective view of a control valve housing.

Description of reference numerals: k1-carburetor shell K2-control valve shell K3-gas control air chamber;

1-air cavity 2-throat 3-mixing cavity 4-first boss 4.1-gas supply channel 4.2-gas inlet channel 5-copper pipe 5.1-gas nozzle 5.2-first gas supply through hole 5.3-second gas supply through hole 6-no-load gas supply channel 6.1-second gas supply through hole processing fabrication hole 7-copper ball 8-throttle valve 9-adjusting screw 10-transition hole 11-transition hole processing fabrication hole 12-plugging piece 13-gas inlet 14-gas outlet 15-second boss 15.1-gas outlet channel 15.2-adjusting screw 16-rocker arm support 17-rocker arm 18-gas inlet plug 19-mounting sink groove of sealing ring.

Detailed Description

In order to make the technical content and the constructional characteristics of the invention more easily understandable for those skilled in the art, the present application is further described below with reference to the accompanying drawings and technical features.

As shown in fig. 1 to 4, the gas carburetor of the present invention includes a carburetor casing K1 and a control valve casing K2 which are fastened together, the control valve casing K2 and the carburetor casing K1 are connected into a whole by bolt connectors, and a gas control air chamber K3 formed by a cavity between the control valve casing K2 and the carburetor casing K1.

An air chamber 1, a throat pipe 2 and a mixing chamber 3 which are communicated with each other are longitudinally arranged in the carburetor shell K1, and a main air passage of the carburetor shell is formed.

The side of the carburetor casing K1 is provided with a first boss 4, a gas air supply channel 4.1 is vertically arranged in the first boss 4 from bottom to top, a gas air inlet channel 4.2 is transversely arranged on the upper portion of the first boss 4, and the upper end of the gas air supply channel 4.1 is communicated with the gas air inlet channel 4.2.

A copper pipe fitting 5 penetrates through the gas inlet channel 4.2, a gas nozzle 5.1 is arranged at the front end (inner end) of the copper pipe fitting 5, the front end of the gas nozzle 5.1 is introduced into the air cavity 1 close to the throat pipe 2, and the rear end (outer end) of the copper pipe fitting 5 is blocked at the rear end of the gas inlet channel 4.2; a first gas supply through hole 5.2 communicated with the gas supply channel is arranged at a position close to the rear end of the copper pipe fitting 5, and the first gas supply through hole 5.2 is drilled after the copper pipe fitting 5 is arranged in the gas supply channel 4.2 and a drill bit penetrates through the gas supply channel 4.1; a second air supply through hole 5.3 communicated with the no-load air supply channel 6 is arranged at a position close to the front end of the copper pipe fitting 5, the second air supply through hole 5.3 is drilled through a second air supply through hole processing technical hole 6.1 after the copper pipe fitting 5 is arranged in the fuel gas inlet channel 4.2, and the second air supply through hole 5.3 is plugged by a copper ball 7 generally after the second air supply through hole is drilled.

The no-load air supply channel 6 is longitudinally arranged in the carburetor shell to form an auxiliary air channel of the carburetor shell. The input end of the no-load air supply channel 6 is communicated with the gas nozzle 5.1, the output end of the no-load air supply channel 6 is communicated with the downstream mixing chamber 3, which is usually the mixing chamber located at the downstream of the rotating shaft of the throttle valve 8, the output end of the no-load air supply channel 6 is provided with an adjusting screw 9 for adjusting the opening degree of the no-load air supply channel, the upstream position close to the output end of the no-load air supply channel 6 is also provided with three transition holes 10, and the number of the transition holes 10. The transition orifice opens into a mixing chamber, typically upstream of the throttle valve.

The carburetor shell is transversely provided with a transition hole machining process hole 11, the aperture of the transition hole machining process hole 11 is larger than that of the transition hole 10, and after the transition hole 10 is machined, the outer end of the transition hole machining process hole 11 is plugged, namely a plugging sheet 12 is arranged.

Be provided with gas air inlet 13 and gas outlet 14 on the control valve casing K2, the second boss 15 of control valve casing K2 side is access to gas outlet 14, second boss 15 and first boss 4 mutually correspond the cooperation, just be provided with gas outlet channel 15.1 in the second boss 15, gas outlet channel 15.1 is put through with the gas air feed passageway 4.1 in the first boss 4 mutually, still install adjusting screw 15.2 on the gas outlet channel 15.1. And a mounting sink groove 19 for mounting a sealing ring is arranged on the matching surface of the second boss and the first boss which are matched with each other.

An air inlet control mechanism, namely a valve component combining a diaphragm and a rocker arm, is arranged in the control valve shell K2. The specific structure of the intake air control mechanism can be referred to the related patent disclosed earlier in this application. In brief, the air inlet control mechanism comprises a rocker arm support 16, a rocker arm 17, an air inlet plug 18, a rocker arm return spring and an elastic diaphragm, wherein the middle part of the rocker arm is erected on the rocker arm support, the air inlet plug is installed at one end of the rocker arm 17, the other end of the rocker arm 17 is connected with the middle part of the elastic diaphragm, and the rocker arm 17 is further provided with the rocker arm return spring, so that the air inlet plug can be plugged on a fuel gas inlet 13 in a control valve shell K2 under a normal state.

The utility model discloses a gas carburetor is through simplifying and improving carburetor casing and control valve casing, and the lock becomes whole about making it can to with the gas air feed channel integration in carburetor casing and control valve casing, its structure is compacter, the volume is littleer, the reliability is stronger. In addition, an idle air supply channel is additionally arranged in the carburetor shell, so that the optimal mixing ratio of six working points of the engine when gas is used is ensured. When the engine is in the no-load working condition, the output end gas supply of the no-load gas supply channel guarantees that under the no-load working condition, the excellent performance of the engine can effectively reduce the emission of harmful substances and is more environment-friendly, when the engine is from the no-load working condition to the load working condition, the gas supply is assisted through the transition holes, the excellent performance in the transition conversion process is guaranteed, the coordination of the gas supply is guaranteed, the gas can be more fully utilized, and the generation of harmful gas is reduced.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and drawings, or directly or indirectly applied to other related technical fields, which are all included in the scope of the present invention.

Claims

1. A gas carburetor, characterized in that: comprises a carburetor shell and a control valve shell which are buckled into a whole up and down;

the carburetor comprises a carburetor shell, a carburetor body, a carburetor nozzle, a carburetor shaft, a carburetor sleeve, a carburetor cover, a carburetor nozzle, a carburetor valve, a carburetor; an idle-load gas supply channel is longitudinally arranged in the carburetor shell, the input end of the idle-load gas supply channel is communicated with a gas nozzle, the output end of the idle-load gas supply channel is communicated with a downstream mixing chamber, an adjusting screw for adjusting the opening degree of the idle-load gas supply channel is arranged at the output end of the idle-load gas supply channel, a transition hole is further arranged at the upstream position close to the output end of the idle-load gas supply channel, and the transition hole is communicated with the mixing chamber;

the control valve shell is provided with a gas inlet and a gas outlet, the gas outlet is communicated with a second boss beside the control valve shell, the second boss corresponds to the first boss, a gas outlet channel is arranged in the second boss, and the gas outlet channel is communicated with a gas supply channel in the first boss; and an air inlet control mechanism is arranged in the control valve shell.

2. A gas gasifier as claimed in claim 1, wherein: a copper pipe fitting penetrates through the gas inlet channel, the front end of the copper pipe fitting is provided with a gas nozzle, and the rear end of the copper pipe fitting is plugged at the rear end of the gas inlet channel; a first gas supply through hole communicated with the gas supply channel is arranged at a position close to the rear end of the copper pipe fitting, and the first gas supply through hole is drilled by a drill bit penetrating through the gas supply channel after the copper pipe fitting is arranged in the gas supply channel; and a second air supply through hole communicated with the no-load air supply channel is arranged at a position close to the front end of the copper pipe fitting, the second air supply through hole is drilled through a drill bit after the copper pipe fitting is arranged in the fuel gas inlet channel, and the second air supply through hole is plugged by a copper ball generally after the second air supply through hole is drilled.

3. A gas gasifier as claimed in claim 1, wherein: the number of the transition holes is several.

4. A gas carburettor as claimed in claim 1 or claim 3 wherein: the carburetor shell is transversely provided with a transition hole machining process hole, the diameter of the transition hole machining process hole is larger than that of the transition hole, and after the transition hole is machined, the outer end of the transition hole machining process hole is blocked.

5. A gas gasifier as claimed in claim 1, wherein: an atmosphere balance through hole is further formed in the side of the bottom of the carburetor shell.

6. A gas gasifier as claimed in claim 1, wherein: the control mechanism admits air includes rocker arm support, rocking arm, air inlet end cap, rocking arm reset spring and elastic diaphragm, the rocker arm middle part is erect at the rocker arm support, the air inlet end cap is installed to the one end of rocking arm, the other end of rocking arm is connected with the elastic diaphragm middle part, just the rocking arm still disposes rocking arm reset spring to under the normal state, the air inlet end cap can the shutoff on being located the gas air inlet of control valve casing.

7. A gas gasifier as claimed in claim 1, wherein: and a mounting sink groove for mounting the sealing ring is arranged on the matching surface of the second boss and the first boss which are matched with each other.