CN217003221U - Flow control valve core and fuel switching device - Google Patents

Abstract

The utility model provides a flow regulating valve core which comprises a valve core body, wherein the flow regulating valve core is simple in structure, and the conduction of a medium passage and a flow passage or a pipe body is realized by regulating the position state of the valve core body, so that the flow regulating function is realized. Because the body is sealed the wearing to establish on the case body in later stage, consequently, reduce the degree of difficulty in the course of working of punching the case body, simplified manufacturing process. The utility model also provides a fuel switching device, which has two fuel gas working states of maximum fuel gas flow and minimum fuel gas flow, so that the two optimum working states can be realized when the internal combustion engine uses liquefied petroleum gas or natural gas according to different flow requirements when the liquefied petroleum gas or natural gas is introduced.

Description

Flow control valve core and fuel switching device

Technical Field

The utility model relates to the technical field of fuel switching devices, in particular to a flow regulating valve core and a fuel switching device.

Background

Existing internal combustion engines typically use a variety of fuels, typically including liquid fuels, typically gasoline or alcohol gasoline, and gaseous fuels, typically both liquefied petroleum gas and natural gas. The liquid fuel is typically in a single liquid fuel passage and the two gaseous fuels share the other gaseous fuel passage. The gaseous fuel passage needs to be closed when using liquid fuel, and the liquid fuel passage needs to be closed when using gaseous fuel (only one of liquefied petroleum gas or natural gas is used) (in the prior art, the closing of the liquid fuel passage is generally switched by an electronic system in the carburetor).

The switching between the liquid fuel and the gas fuel is generally realized by a fuel switching device, and the fuel switching device switches the opening and closing of a liquid fuel passage or a gas fuel passage to realize the switching between the liquid fuel and the gas fuel.

When using gas fuel, the required flow rate of the liquefied petroleum gas or the natural gas is different due to the difference of the air-fuel ratio of the liquefied petroleum gas and the natural gas. Current fuel switching device need install complicated flow control mechanism additional and just can realize the regulation of different flow sizes when letting in natural gas or liquefied petroleum gas, so, has not only increased the complexity of switching device structure, and is bulky, has occupied great spatial position to, also can make complex operation, waste time and energy.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide a flow regulating valve core which can meet different flow requirements when the same medium is introduced or two different media are introduced respectively.

In order to achieve the purpose, the utility model provides a flow regulating valve core, which comprises a valve core body and a pipe body, wherein the valve core body is of a spherical structure, a flow channel, a first mounting hole and a second mounting hole penetrate through the valve core body, the first mounting hole and the second mounting hole are respectively communicated with the flow channel, and the pipe body is respectively arranged in the first mounting hole and the second mounting hole in a sealing and penetrating manner;

the cross-sectional area of the flow passage is recorded as S1, the cross-sectional area of the inner hole of the tube body is recorded as S2, the cross-sectional area of the tube body in the flow passage is recorded as S3, the difference between S1 and S3 is recorded as S4, and S4 is larger than S2.

Preferably, the pipe body and the flow passage both pass through the spherical center of the valve core body.

Preferably, the flow passage is perpendicular to the pipe body.

Preferably, the tube body is in a circular tube shape.

Another object of the present invention is to provide a fuel switching device to meet different flow requirements when introducing lpg or natural gas.

In order to achieve the above object, the present invention provides a fuel switching device, which is equipped with the above flow rate regulating valve core, and comprises a housing, a first sealing element and a second sealing element, wherein the housing is provided with an inner cavity, an air inlet and an air outlet, the valve core body, the first sealing element and the second sealing element are all arranged in the inner cavity, the first sealing element is close to the air inlet and penetrates through a first through hole, the second sealing element is close to the air outlet and penetrates through a second through hole, and the first sealing element and the second sealing element are respectively sealed and attached to a spherical surface of the valve core body;

the valve core body is provided with a first station, a second station and a third station, and when the valve core body rotates to the first station, the air inlet, the first through hole, the flow channel, the second through hole and the air outlet are communicated in sequence;

when the valve core body rotates to the second station, the air inlet, the first through hole, the pipe body, the second through hole and the air outlet are communicated in sequence;

when the valve core body rotates to the third station, the valve core body blocks the communication between the air inlet and the air outlet.

Preferably, a valve rod is arranged in the shell in a sealing and rotating mode, and one end of the valve rod is connected with the valve core body.

Preferably, the casing is one end open-ended one end enclosed construction, the air inlet sets up the open end of casing, the gas outlet sets up the blind end of casing.

The utility model has the beneficial effects that:

1. the utility model discloses a flow regulating valve core, which is characterized in that a pipe body is hermetically arranged in a first mounting hole and a second mounting hole in a penetrating manner, so that the pipe body cannot interfere with a flow channel. And because S4 is greater than S2, the medium flow through the flow passage is greater than the medium flow through the tube, so that the flow regulating valve core has two working states, namely a large flow state through the flow passage and a small flow state through the tube, and thus the flow regulating valve core can be switched to different working states according to actual requirements when the same medium is introduced or two different media are introduced respectively, so as to realize different flow requirements.

Simultaneously, because the body is that the later stage seals to wear to establish on the case body, consequently, reduce the degree of difficulty in the course of working of punching the case, simplified manufacturing process. The flow regulating valve core is simple in structure, and the medium passage is communicated with the flow channel or the pipe body by regulating the position state of the valve core body, so that the function of flow regulation is realized.

2. The utility model discloses a fuel switching device, which has two fuel gas working states of maximum fuel gas flow and minimum fuel gas flow, so that two optimal working states can be realized when an internal combustion engine uses liquefied petroleum gas or natural gas according to different flow requirements when the liquefied petroleum gas or the natural gas is introduced. And the device has compact integral structure, small occupied space, safety, reliability and good universality, can quickly realize the switching of liquefied petroleum gas or natural gas, and can effectively improve the dynamic property and the economical efficiency of the internal combustion engine.

Drawings

In order to more clearly illustrate the detailed description of the utility model or the technical solutions in the prior art, the drawings that are needed in the detailed description of the utility model or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a schematic structural diagram of a flow regulating valve cartridge according to an embodiment of the present invention;

FIG. 2 is a front view of the valve cartridge body on one side of the flow passage;

FIG. 3 is a front view of the valve cartridge body on one side of the tube;

FIG. 4 is a schematic sectional view taken along line A-A of FIG. 2;

FIG. 5 is a schematic sectional view taken along line B-B in FIG. 2;

FIG. 6 is a schematic structural diagram of a fuel switching device according to an embodiment of the present invention;

FIG. 7 is a schematic view of the fuel switching device in a first gas operating state;

FIG. 8 is a schematic structural view of the fuel switching device in a second gas operating state;

fig. 9 is a schematic structural view of the fuel switching device in a gas-off operating state.

Reference numerals:

10-a valve core body, 11-a flow channel, 12-a first mounting hole and 13-a second mounting hole;

20-a pipe body;

30-shell, 31-inner cavity, 32-air inlet, 33-air outlet;

40-first seal, 41-first through hole;

50-second seal, 51-second through hole;

60-valve stem.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the utility model pertains.

In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Example one

As shown in fig. 1 to 5, in a first embodiment of the present invention, a flow rate regulating valve core is provided, which includes a valve core body 10 and a pipe body 20, wherein the valve core body 10 is a spherical structure, a flow channel 11, a first mounting hole 12 and a second mounting hole 13 are formed through the valve core body 10, the first mounting hole 12 and the second mounting hole 13 are respectively communicated with the flow channel 11, and the pipe body 20 is respectively and sealingly inserted into the first mounting hole 12 and the second mounting hole 13. The cross-sectional area of the flow passage 11 is designated as S1, the cross-sectional area of the bore of the tube 20 is designated as S2, the cross-sectional area of the tube 20 in the flow passage 11 is designated as S3, the difference between S1 and S3 is designated as S4, and S4 is greater than S2.

In the flow rate regulating valve core of the present embodiment, since the pipe body 20 is sealingly inserted into the first mounting hole 12 and the second mounting hole 13, the pipe body 20 does not interfere with the flow channel 11. In addition, since S4 is greater than S2, the flow rate of the medium passing through the flow passage 11 is greater than the flow rate passing through the tube 20, so that the flow rate regulating valve core has two working states, namely a large flow rate state passing through the flow passage 11 and a small flow rate state passing through the tube 20, and thus, the flow rate regulating valve core can be switched to different working states according to actual requirements when the same medium is introduced or two different media are introduced respectively, so as to realize different flow rate requirements.

Simultaneously, because the body 20 is that the later stage is sealed wears to establish on case body 10, consequently, reduces the degree of difficulty in the course of working of punching to case body 10, has simplified manufacturing process. The flow regulating valve core is simple in structure, and the medium passage is communicated with the flow channel 11 or the pipe body 20 by regulating the position state of the valve core body 10, so that the flow regulating function is realized.

In one embodiment, the tube 20 and the flow channel 11 both pass through the center of the valve body 10, and the flow channel 11 is perpendicular to the tube 20. This design makes after installing this case body 10 in the valve body structure, through ninety degrees rotatory case body 10, just can realize conducting of medium route and runner 11 or body 20 to realize flow control's function, and then conveniently carry out effectual control to the index angle of case body 10.

In one embodiment, the tube 20 is a circular tube, and since the tube 20 passes through the flow channel 11, the medium is blocked by the tube 20 during the process of flowing through the flow channel 11, so that the obstruction of the tube 20 to the flowing medium is effectively reduced by designing the tube 20 into a circular tube structure.

Example two

As shown in fig. 6 to 9, in the second embodiment of the present invention, a fuel switching device is provided, in which the above-mentioned flow rate adjustment valve cartridge is installed, the fuel switching device includes a housing 30, a first sealing member 40 and a second sealing member 50, the housing 30 is provided with an inner cavity 31, an air inlet 32 and an air outlet 33, the valve cartridge body 10, the first sealing member 40 and the second sealing member 50 are all disposed in the inner cavity 31, the first sealing member 40 is close to the air inlet 32 and penetrates through a first through hole 41, the second sealing member 50 is close to the air outlet 33 and penetrates through a second through hole 51, and the first sealing member 40 and the second sealing member 50 are respectively and sealingly attached to a spherical surface of the valve cartridge body 10.

The valve core body 10 has the main function of respectively conducting two different gas fuels in the fuel switching device, and the valve core body 10 is provided with a first station, a second station and a third station. Referring to fig. 7, when the valve body 10 rotates to the first position, the air inlet 32, the first through hole 41, the flow passage 11, the second through hole 51, and the air outlet 33 are sequentially communicated. Therefore, the fuel switching device will realize the first gas working state (the gas flow is maximum), and the gas inlet 32 will be filled with natural gas for working.

Referring to fig. 8, when the valve core body 10 rotates to the second position, the air inlet 32, the first through hole 41, the tube body 20, the second through hole 51 and the air outlet 33 are sequentially communicated. Thus, the fuel switching device will achieve the second gas operating condition (gas flow is minimized), and the gas inlet 32 will be filled with lpg gas for operation.

Referring to fig. 9, when the valve core body 10 rotates to the third position, the valve core body 10 blocks the communication between the air inlet 32 and the air outlet 33, so that the fuel switching device realizes a gas off state or realizes a working state of other fuels.

Therefore, the fuel switching device has three working states, namely a first gas working state, a second gas working state and a gas closing working state.

The fuel switching device has two fuel gas working states of maximum fuel gas flow and minimum fuel gas flow, so that the two optimum working states can be realized when the internal combustion engine uses liquefied petroleum gas or natural gas according to different flow requirements when the liquefied petroleum gas or natural gas is introduced. The device has compact integral structure, small occupied space, safety, reliability and good universality, can quickly realize the switching of liquefied petroleum gas or natural gas, and can effectively improve the dynamic property and the economical efficiency of the internal combustion engine.

In one embodiment, the housing 30 is provided with a valve stem 60 in a sealing and rotating manner, and one end of the valve stem 60 is connected with the valve core body 10. The valve core body 10 can be designed with a clamping groove (not shown in the figure), and the valve rod 60 can be designed with a clamping head matched with the clamping groove, so that the valve core body 10 can rotate in the inner cavity 31 by driving the valve rod 60 to rotate, and further, the switching of the working state of the fuel switching device can be realized.

In one embodiment, to facilitate the assembly of the valve cartridge body 10 in the housing 30, the housing 30 is in an open-end-closed structure, the air inlet 32 is disposed at the open end of the housing 30, and the air outlet 33 is disposed at the closed end of the housing 30.

Certainly, a fuel valve core linked with the valve core body 10 can be designed in the shell 30, and the switching of liquefied petroleum gas, natural gas and fuel oil is realized by adjusting the position of the valve core body 10, so that the dynamic property and the economical efficiency of the internal combustion engine are effectively improved. The structure of the fuel valve core can adopt the prior art structure, and the description is omitted.

In the description of the present invention, numerous specific details are set forth. However, it is understood that embodiments of the utility model may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

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; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being covered by the appended claims and their equivalents.

Claims (7)

1. A flow control valve cartridge, characterized by: the valve core body is of a spherical structure, a flow channel, a first mounting hole and a second mounting hole penetrate through the valve core body, the first mounting hole and the second mounting hole are respectively communicated with the flow channel, and the pipe body is respectively hermetically arranged in the first mounting hole and the second mounting hole in a penetrating manner;

the cross-sectional area of the flow passage is recorded as S1, the cross-sectional area of the inner hole of the pipe body is recorded as S2, the cross-sectional area of the pipe body in the flow passage is recorded as S3, the difference between S1 and S3 is recorded as S4, and S4 is larger than S2.

2. The flow regulating valve cartridge of claim 1, wherein: the pipe body and the flow channel both penetrate through the spherical center of the valve core body.

3. The flow regulating valve cartridge according to claim 1 or 2, wherein: the flow channel is perpendicular to the pipe body.

4. The flow regulating valve cartridge of claim 1, wherein: the pipe body is in a circular pipe shape.

5. A fuel switching device equipped with the flow rate regulation cartridge of any one of claims 1 to 4, characterized in that: the valve core comprises a shell, a first sealing element and a second sealing element, wherein the shell is provided with an inner cavity, an air inlet and an air outlet, the valve core body, the first sealing element and the second sealing element are all arranged in the inner cavity, the first sealing element is close to the air inlet and provided with a first through hole in a penetrating manner, the second sealing element is close to the air outlet and provided with a second through hole in a penetrating manner, and the first sealing element and the second sealing element are respectively attached to the spherical surface of the valve core body in a sealing manner;

the valve core body is provided with a first station, a second station and a third station, and when the valve core body rotates to the first station, the air inlet, the first through hole, the flow channel, the second through hole and the air outlet are communicated in sequence;

when the valve core body rotates to the second station, the air inlet, the first through hole, the pipe body, the second through hole and the air outlet are communicated in sequence;

when the valve core body rotates to the third station, the valve core body blocks the communication between the air inlet and the air outlet.

6. The fuel switching apparatus according to claim 5, characterized in that: the valve rod is arranged in the shell in a sealing and rotating mode, and one end of the valve rod is connected with the valve core body.

7. The fuel switching apparatus according to claim 5, characterized in that: the casing is the open one end enclosed construction in one end, the air inlet sets up the open end of casing, the gas outlet sets up the blind end of casing.

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