CN219587663U - Switching valve for double-main-orifice carburetor applicable to various elevation areas - Google Patents

Abstract

The utility model discloses a switching valve for a double-main-hole carburetor applicable to various elevation areas, wherein a main spray pipe and an oil inlet channel are arranged on a carburetor body, two oil passing channels for supplying oil for the main spray pipe are arranged between the main spray pipe and the oil inlet channel, the main spray pipe is used for selecting one-way oil supply with the two oil passing channels through the switching valve, the switching valve comprises a valve seat, a valve core and a valve cover, the valve core is limited between the valve seat and the valve cover in a mode of rotating around the axis of the valve core in a single degree of freedom manner, and an oil guide groove which enables the oil inlet channel to be connected with the two oil passing channels in a one-way mode is formed in the inner side of the valve core along with the rotation of the valve core. According to the utility model, the oil inlet aperture of the oil inlet duct can be switched through simple knob operation, so that the oil inlet quantity is regulated, the oil inlet quantity regulating mode is faster in response, the carburetor can meet the requirements of various altitude working environments through switching the main metering orifice, and the carburetor is safe, efficient, low in cost and suitable for popularization.

Description

Switching valve for double-main-orifice carburetor applicable to various elevation areas

Technical Field

The utility model relates to the technical field of engine parts, in particular to a switching valve for a double-main-orifice carburetor applicable to various altitude areas.

Background

A carburetor (carburetor) is a mechanical device that mixes a proportion of gasoline with air under the vacuum created by the operation of an engine. The carburetor acts as a precision mechanical device that utilizes the kinetic energy of the intake air flow to effect atomization of the gasoline. The complete device comprises a starting device, an idling device, a medium-load device, a full-load device and an accelerating device. The carburetor can automatically proportion corresponding concentration according to different working state demands of the engine and output corresponding amount of mixed gas, and in order to ensure that the mixed gas is uniformly mixed, the carburetor also has the effect of atomizing fuel oil so as to ensure that the machine normally operates.

The existing gasoline engine and the carburetor used by the same are generally designed according to a low-altitude working environment and can only adapt to the low-altitude working environment, and when the gasoline engine is used in a high-altitude area, the problems of insufficient power, unstable operation, black smoke emission of tail gas, high oil consumption and the like easily occur. The existing processing mode is to replace or adjust the air inlet of the carburetor, and the carburetor is connected with an oil tank, an air filter, an engine power unit and the like, so that the disassembly and the assembly of the carburetor are complicated, especially when the oil path part of the carburetor is disassembled and connected, the skill requirement on operators is high, otherwise, the problem of potential safety hazard such as oil leakage after the replacement of the carburetor is extremely easy to occur; if the carburetor is adjusted in such a way that the intake air amount of the intake port is adjusted so that the carburetor meets the demands of the high altitude working environment, there is no way to quantify the adjustment of the intake air amount, and therefore, it is very troublesome.

Therefore, in order to solve the above problems, a switching valve for a double-main-hole carburetor applicable to various altitude areas is needed, the oil inlet aperture size of an oil inlet duct can be switched through simple knob operation to adjust the oil inlet amount, and the switching valve is different from the traditional mode of adjusting the air inlet amount to adapt to different altitude working demands, has faster response in the mode of adjusting the oil inlet amount, can meet the demands of various altitude working environments through switching the main-hole carburetor, is safe and efficient, has low cost and is suitable for popularization.

Disclosure of Invention

Therefore, the utility model aims to overcome the defects in the prior art, and provides the switching valve for the double-main-hole carburetor, which is applicable to various altitude areas, the oil inlet aperture of the oil inlet duct can be switched through simple knob operation to adjust the oil inlet amount, and compared with the traditional mode of adjusting the air inlet amount to realize that the carburetor is suitable for different altitude working demands, the mode of adjusting the oil inlet amount responds more quickly, and the carburetor can meet the demands of various altitude working environments by switching the main-hole, thereby being safe, efficient, low in cost and suitable for popularization.

The utility model discloses a switching valve for a double-main-hole carburetor applicable to various elevation areas, wherein a main spray pipe and an oil inlet channel are arranged on a carburetor body, two oil passages for supplying oil to the main spray pipe are arranged between the main spray pipe and the oil inlet channel, the main spray pipe is used for selecting one-way oil supply with the two oil passages through the switching valve, the switching valve comprises a valve seat, a valve core and a valve cover, the valve core is limited between the valve seat and the valve cover in a mode of rotating around the axis of the valve core in a single degree of freedom (the axis of the valve core is perpendicular to the bottom surface of the valve seat), the inner side of the valve core (i.e. the valve core is attached to the side surface of the valve seat) is provided with an oil guide groove which enables the oil inlet channel to be in alternative connection with the two oil passages along with the rotation of the valve core, a first main-hole and a second main-hole with different apertures are arranged in the two oil passages, the aperture of the first main-hole is used for meeting the oil inlet quantity requirement of fuel when working at a low elevation, the second main-hole is used for meeting the oil inlet quantity requirement of fuel when working at a high elevation, and the first main-hole is used for switching the fuel quantity through the switching valve, and the first main-hole and the second main-hole is used for switching fuel quantity conveniently and safely and fast.

Further, a float chamber is formed below the carburetor body by a float cover, a main oil well communicated with a throat pipe and used for installing a main spray pipe is formed in the float chamber, a boss is arranged on the inner side of the float cover, a main oil duct, an oil inlet duct and two oil passing ducts are arranged in the boss, the main oil duct is communicated with the main oil well, the two oil passing ducts are communicated with the main oil duct, the valve seat is fixedly arranged on the float cover, the oil inlet duct and the two oil passing ducts penetrate through the bottom of the valve seat, and the oil inlet direction of the carburetor is from an inlet of the oil inlet duct to an oil guide groove to the oil passing duct with a first main metering orifice/the oil passing duct with a second main metering orifice to the main spray pipe in the main oil well to the throat pipe are atomized under the driving of air to enter the engine for combustion.

Further, the oil inlet channel is always communicated with the oil guide groove, the structure is simple, the oil inlet is reliable and stable, the adjustment and the switching are convenient, the size of the oil guide groove is designed according to the adaptability of the two oil passing channels and the size of the through hole at the bottom of the oil inlet channel and the valve seat, and when the valve core rotates, the oil inlet channel can be communicated with the oil passing channel provided with the first main measuring hole or the oil passing channel provided with the second main measuring hole through the oil guide groove.

Further, the valve deck with disk seat detachable fixed connection, seted up spacing hole on the valve deck, the case is followed spacing hole outwards extends and forms pivot and stopper, the pivot is used for driving the case rotates in order to realize advance oil duct and two it is linked together to cross the oil duct selection, the stopper with spacing hole cooperation is used for prescribing a limit to the corner of case, the stopper suits with the shape of spacing hole.

Further, the main oil duct extends along the protruding direction of the boss, the two oil ducts are vertically communicated with the main oil duct, the oil ducts and the main oil duct are all arranged to be linear channels, the fuel oil trafficability is improved, meanwhile, the production and processing procedures are simplified, the arrangement of the channels is facilitated, and the light-weight design and manufacture are facilitated.

Further, a sealing component is arranged between the valve seat and the valve core and used for guaranteeing oil passing tightness between the valve core and the valve seat, and fuel leakage is avoided.

Further, the sealing assembly comprises a sealing gasket and a sealing ring, the sealing gasket is embedded in the bottom of the valve seat, and the sealing gasket is attached to the inner side edge of the valve core, so that the airtight attachment of each step contact surface between the valve core and the valve seat is ensured.

Further, the positioning column used for assembling and positioning the sealing gasket is arranged on the bottom surface of the valve seat, and holes which are matched with the positioning column, the oil inlet channel and the two oil passage shapes are formed in the sealing gasket, so that the sealing gasket is convenient to assemble.

Further, the first main metering orifice and the second main metering orifice with different flow apertures are arranged in the two oil passing channels and used for meeting oil inlet requirements of working at different altitudes.

Further, the tail end of the rotating shaft is connected with a handle for manually operating the rotary valve core, so that the main metering orifice is conveniently switched by manual operation, and the carburetor is ensured to be suitable for working requirements of different altitudes.

The beneficial effects of the utility model are as follows: the switching valve for the double-main-hole carburetor suitable for various elevation areas can switch the oil inlet aperture of the oil inlet duct through simple knob operation to adjust the oil inlet amount, has a faster response of the oil inlet amount adjusting mode compared with the traditional mode of adjusting the air inlet amount to realize that the carburetor is suitable for different elevation working requirements, can meet the requirements of various elevation working environments through switching the main-hole carburetor, is safe and efficient, has low cost and is suitable for popularization.

Drawings

The utility model is further described below with reference to the accompanying drawings and examples:

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic diagram of an explosive structure according to the present utility model;

FIG. 3 is a schematic elevational view of the structure of FIG. 1;

FIG. 4 is a schematic cross-sectional view of A-A of FIG. 3;

FIG. 5 is a schematic view of the structure of the float cover of the present utility model;

FIG. 6 is a schematic side view of FIG. 5;

FIG. 7 is a schematic cross-sectional view of G-G of FIG. 6;

fig. 8 is a schematic diagram of a valve core structure of the present utility model.

Detailed Description

Fig. 1 is a schematic diagram of the structure of the present utility model, fig. 2 is a schematic diagram of the explosion structure of the present utility model, fig. 3 is a schematic diagram of the front view of fig. 1, fig. 4 is a schematic diagram of the cross-section structure of A-A in fig. 3, fig. 5 is a schematic diagram of the structure of the float cover of the present utility model, fig. 6 is a schematic diagram of the side view of fig. 5, fig. 7 is a schematic diagram of the cross-section structure of G-G in fig. 6, fig. 8 is a schematic diagram of the valve core structure of the present utility model, a switching valve for a dual main port carburetor suitable for various altitude areas is shown in the present embodiment, a main nozzle 3 and an intake duct 8 are provided on a carburetor body 1, two through ducts 6 for supplying oil to the main nozzle 3 are provided between the main nozzle 3 and the intake duct 8, the main nozzle 3 selects one of the two through ducts 6 through the switching valve 7, the switching valve 7 includes a valve seat 71, a valve core 72 and a valve cover 73, the valve core 72 is limited between the valve seat 71 and the valve cover 73 in a mode of rotating around the axis of the valve core 72 in a single degree of freedom (the axis of the valve core is perpendicular to the bottom surface of the valve seat), an oil guide groove 72a which rotates along with the valve core 72 to enable the oil inlet channel 8 to be selectively communicated with the two oil passing channels 6 is formed in the inner side of the valve core 72 (namely, the valve core is attached to the side surface of the valve seat), first main metering holes 9a and second main metering holes 9b with different apertures are formed in the two oil passing channels 6, the aperture of the first main metering holes 9a is used for meeting the oil inlet quantity requirement of the carburetor on fuel when working at a low altitude, the second main metering holes 9b are used for meeting the oil inlet quantity requirement of the carburetor on fuel when working at a high altitude, and switching operation is performed between the first main metering holes 9a and the second main metering holes 9b through a switching valve 7, so that the switching operation is convenient, reliable, safe and quick.

In this embodiment, a float chamber is formed below the carburetor body 1 by a float cover 2, a main oil well 4 which is communicated with a throat and is used for installing a main spray pipe 3 is formed in the float chamber, a boss is arranged at the inner side of the float cover 2, a main oil duct 5, an oil inlet channel 8 and two oil passing channels 6 are arranged in the boss, the main oil duct 5 is communicated with the main oil well 4, the two oil passing channels 6 are communicated with the main oil duct 5, a valve seat 71 is fixedly arranged on the float cover 2, the oil inlet channel 8 and the two oil passing channels 6 penetrate through the bottom of the valve seat 71, and the oil inlet direction of the carburetor is from an inlet of the oil inlet channel 8 to an oil guide groove 72a to the oil passing channel 6 with a first main metering orifice 9 a/the oil passing channel 6 with a second main metering orifice 9b to the main spray pipe 3 in the main oil well 4 to the throat are atomized under the driving of air to enter the engine for combustion.

In this embodiment, the oil inlet channel 8 is always communicated with the oil guiding channel 72a, which is simple in structure, reliable and stable in oil inlet, convenient to adjust and switch, the size of the oil guiding channel 72a is designed adaptively according to the sizes of the two oil passing channels 6 and the through holes at the bottom of the oil inlet channel 8 and the valve seat 71, and when the valve core 72 rotates, the oil guiding channel 72a can ensure that the oil inlet channel 8 is communicated with the oil passing channel 6 provided with the first main metering orifice 9a or the oil passing channel 6 provided with the second main metering orifice 9 b.

In this embodiment, the valve cover 73 is detachably and fixedly connected with the valve seat 71, a limiting hole 73a is formed in the valve cover 73, the valve core 72 extends outwards along the limiting hole 73a to form a rotating shaft 72b and a limiting block 72c, the rotating shaft 72b is used for driving the valve core 72 to rotate so as to realize that the oil inlet channel 8 is communicated with the two oil passing channels 6, the limiting block 72c is matched with the limiting hole 73a to limit the corner of the valve core 72, and the limiting block 72c is adapted to the shape of the limiting hole 73 a.

In this embodiment, the main oil duct 5 extends along the protruding direction of the boss, two the oil duct 6 is vertically communicated with the main oil duct 5, the oil duct 6 and the main oil duct 5 are both linear channels, the fuel oil passing performance is improved, meanwhile, the production and processing procedures are simplified, the arrangement of each channel is facilitated, and the light-weight design and manufacture are facilitated.

In this embodiment, a sealing assembly is disposed between the valve seat 71 and the valve core 72 to ensure the oil-passing tightness between the valve core 72 and the valve seat 71, so as to avoid leakage of fuel.

In this embodiment, the sealing assembly includes a sealing pad 74 and a sealing ring 75, the sealing pad 74 is embedded in the bottom of the valve seat 71, and the sealing pad 74 is attached to the inner edge of the valve core 72, so as to ensure the airtight attachment of each step contact surface between the valve core 72 and the valve seat 71.

In this embodiment, the bottom surface of the valve seat 71 is provided with a positioning column 71a for assembling and positioning the sealing pad 74, and the sealing pad 74 is provided with holes corresponding to the shapes of the positioning column 71a, the oil inlet duct 8 and the two oil passing ducts 6, so that the assembly is convenient.

In this embodiment, the two oil passages 6 are provided with a first main metering orifice 9a and a second main metering orifice 9b having different flow apertures, so as to meet the oil inlet requirements of working at different altitudes.

In this embodiment, the end of the rotating shaft 72b is connected with a sealing ring 76 for manually operating the rotary valve core 72, so as to facilitate the manual operation to switch the main metering orifice and ensure that the carburetor is suitable for the working requirements of different altitudes.

The switching valve for the double-main-hole carburetor suitable for various altitude areas can switch the oil inlet aperture of the oil inlet duct 8 through simple knob operation to adjust the oil inlet amount, has quicker response in the way of adjusting the oil inlet amount compared with the traditional way of adjusting the air inlet amount to realize that the carburetor is suitable for different altitude working demands, can meet the demands of various altitude working environments through switching the main-hole carburetor, is safe and efficient, has low cost and is suitable for popularization.

Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered by the scope of the claims of the present utility model.

Claims (10)

1. A switching valve for a double-main-orifice carburetor suitable for various elevation areas is characterized in that: the carburetor is characterized in that a main spray pipe and an oil inlet channel are arranged on the carburetor body, two oil passing channels for supplying oil to the main spray pipe are arranged between the main spray pipe and the oil inlet channel, the main spray pipe is communicated with the two oil passing channels through a switching valve, the switching valve comprises a valve seat, a valve core and a valve cover, the valve core is limited and arranged between the valve seat and the valve cover in a mode of rotating around the axis of the valve core in a single degree of freedom manner, and an oil guide groove which is communicated with the two oil passing channels through the oil passing channels along with the rotation of the valve core is formed in the inner side of the valve core.

2. The switching valve for a dual main port carburetor applicable to various altitude areas according to claim 1, wherein: the carburetor body below is by float lid formation float chamber, form in the float chamber with the venturi switch on and be used for installing the main oil well of main spray tube, float lid inboard is provided with the boss, be provided with main oil duct, inlet duct and two in the boss and cross the oil duct, the main oil duct with main oil well intercommunication, two cross the oil duct all with main oil duct intercommunication, the disk seat is fixed to be set up on the float is covered, inlet duct with two cross the oil duct run through in the disk seat bottom.

3. The switching valve for a dual main port carburetor applicable to various altitude areas according to claim 2, wherein: the oil inlet channel is communicated with the oil guide groove.

4. The switching valve for a dual main port carburetor applicable to various altitude areas according to claim 2, wherein: the valve cover is fixedly connected with the valve seat in a detachable mode, a limiting hole is formed in the valve cover, the valve core extends outwards along the limiting hole to form a rotating shaft and a limiting block, the rotating shaft is used for driving the valve core to rotate so as to achieve that the oil inlet channel is communicated with the two oil passing channels in a selective mode, and the limiting block is matched with the limiting hole to limit the rotating angle of the valve core.

5. The switching valve for a dual main port carburetor applicable to various altitude areas according to claim 2, wherein: the main oil duct extends along the protruding direction of the boss, and the two oil passing ducts are vertically communicated with the main oil duct.

6. The switching valve for a dual main port carburetor applicable to various altitude areas according to claim 2, wherein: and a sealing component is arranged between the valve seat and the valve core and used for ensuring the oil passing tightness between the valve core and the valve seat.

7. The switching valve for a dual main port carburetor applicable to various altitude areas according to claim 6, wherein: the sealing assembly comprises a sealing gasket and a sealing ring, the sealing gasket is embedded in the bottom of the valve seat, and the sealing gasket is attached to the inner side edge of the valve core.

8. The switching valve for a dual main port carburetor applicable to various altitude areas according to claim 7, wherein: the valve seat bottom surface is provided with the reference column that is used for sealed pad assembly location, set up on the sealed pad with reference column, oil feed way and two pass the hole that the oil duct shape suited.

9. The switching valve for a dual main port carburetor applicable to various altitude areas according to claim 1, wherein: the two oil passing channels are internally provided with a first main measuring hole and a second main measuring hole with different flow apertures, and the first main measuring hole and the second main measuring hole are used for meeting oil inlet requirements of working at different altitudes.

10. The switching valve for a dual main port carburetor applicable to various altitude areas according to claim 4, wherein: the tail end of the rotating shaft is connected with a handle for manually operating the rotary valve core.