KR20230076451A - Valve device having fule overcharge protection structure - Google Patents

Abstract

Disclosed is a valve device having a structure to prevent fuel overfilling. The valve device having a structure to prevent fuel overfilling comprises: a valve housing connected to a fuel tank and having an internal passage for injection and filling gas fuel; a valve plug having an injection passage, and formed on the valve housing side in a state in which the injection passage side is connected to the inner passage side of the valve housing so as to communicate with each other; an injection valve part having a check valve disposed on the injection passage side of the valve plug and capable of opening and closing in a state consistent with the injection and filling of the gas fuel; a shut-off valve part having a cut valve and a cut disk arranged to correspond to the inner passage side of the valve housing and formed to be opened and closed to prevent overfilling according to the injection and filling amount of gas fuel; and an injection guide part formed to secure a flow path for the injection and filling the gas fuel in a state of covering the cut valve side of the shut-off valve part while sliding in conjunction with the opening and closing operation of the injection valve part side.

Description

Valve device having a fuel overcharge prevention structure {VALVE DEVICE HAVING FULE OVERCHARGE PROTECTION STRUCTURE}

The present invention relates to a valve device having a fuel overfill prevention structure.

In general, vehicles using gas such as LPG as fuel are provided with a fuel tank for charging and storing gas fuel.

Considering that the fuel tank is installed and used in a vehicle, which is a means of transportation, in a state in which gas fuel is injected and charged, it is important to ensure stability of injection, charging, and storage of gas fuel.

To this end, a structure in which the fuel tank side is installed in conjunction with a valve device, and the injection, charging, and storage of gas fuel can be smoothly guided and controlled by the valve device is required.

Such a valve device is formed to have a function to prevent overcharge of gas fuel as well as a structure consistent with stable injection, charging, and storage of gas fuel, so that the safety of use of the fuel tank can be further increased.

In particular, in order to secure the operational stability and reliability of the overcharge prevention system among the main components of the valve device, it is necessary to reduce the contact interference between the corresponding parts during on/off operation and to secure the pressure resistance against the fluid (gas fuel) pressure. It is preferable to be formed to have a structure that can be.

(Patent Document 0001) Patent Registration No. 10-1686925.

The present invention has been made to solve the conventional problems as described above,

An object of the present invention is to provide an overcharge prevention structure formed to control the flow of fluid in a state consistent with the injection and charging of gas fuel such as LPG, and in particular to secure durability and operational stability of an overcharge blocking system for gas fuel. It is to provide a valve device having.

In order to realize the object of the present invention as described above,

a valve housing connected to the fuel tank side and having an internal passage for injection and charging of gaseous fuel;

a valve plug having an injection passage and formed on the valve housing side in a state in which the injection passage side is connected to communicate with the inner passage side of the valve housing;

an injection valve unit provided with a check valve disposed on the injection passage side of the valve plug and capable of opening and closing in a state consistent with injection and charging of gas fuel;

a shut-off valve unit provided with a cut valve and a cut disc disposed to correspond to the inner passage side of the valve housing and formed to open and close to block overcharging according to the injected amount of gas fuel; and

An injection guide portion formed to secure a fluid flow path for injection and charging of gas fuel in a state in which a sliding operation is performed in conjunction with an opening and closing operation of the injection valve portion and covers a cut valve side of the blocking valve portion;

It provides a valve device having a fuel overfill prevention structure comprising a.

The present invention as described above is to provide a valve device structure in which gas fuel injection and charging can be performed in a state in which overcharging can be blocked while the injection valve unit, the blocking valve unit, and the injection guide unit operate in conjunction with each other inside the valve housing. can

In particular, since the injection guide part is formed to secure a fluid flow path in a state in correspondence with the cover of the shut-off valve part (cut valve) in connection with the operation of the injection valve part, the fluid flows from the inner passage side of the valve housing during fuel injection and charging. Deformation or damage of the cut valve side due to pressure or contact interference can be suppressed as much as possible, and as a result, the effect of further increasing the durability and operational stability of the valve device can be expected.

1 is a diagram schematically showing the entire structure of a valve device having a fuel overfill prevention structure according to an embodiment of the present invention.
2 to 8 are views for explaining the detailed structure and operation of the valve device having a fuel overfill prevention structure according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

Embodiments of the present invention are described to the extent that those with average knowledge in the art can practice the present invention.

Therefore, since the embodiments of the present invention can be modified in many different forms, the claims of the present invention are not limited due to the embodiments described below.

1 is a diagram schematically showing the overall structure of a valve device having a fuel overfill prevention structure according to an embodiment of the present invention, and FIGS. 2 to 8 are diagrams for explaining detailed structures and actions. 8, the valve device having a fuel overfill prevention structure according to an embodiment includes a valve housing 10, a valve plug 20, an injection valve unit 30, a blocking valve unit 40, and an injection guide. It is made including part (50).

As shown in FIGS. 1 and 2 , the valve housing 10 has an internal passage 12 through which gaseous fuel (G, hereinafter referred to as “fuel”) is injected and charged, and is provided on the fuel tank T side of an automobile or the like. It can be set in a state where the injection and charging of the fuel G is connected (piping).

The inner passage 12 is formed in the form of a passage through which fuel G can be injected and charged through the inside of the valve housing 10, and includes an injection valve unit 30, a shutoff valve unit 40, and an injection guide, which will be described later. It is formed to have a passage structure consistent with the installation of the unit 50.

In addition, one end (inside) of the extension section of the inner passage 12 is formed in a state of being in communication with the inlet hole 14 side of the valve housing 10 inside the valve housing 10 as shown in FIG. 2 .

The inlet hole 14 is a section in which the supply of fuel G is blocked during an overcharge blocking operation, and may be formed inside the valve housing 10 in a direction forming an angle with the inner passage 12 side.

The material of the valve housing 10 may be selected and used among metals having excellent durability, corrosion resistance, and chemical resistance, and may be formed, for example, by a conventional mold molding method.

The valve plug 20 has an injection passage 22 as shown in FIG. 2, and the injection passage 22 side communicates with the inner passage 12 side of the valve housing 10 so that the valve housing ( 10) The connection is installed on the side.

That is, in the valve plug 20, one end of the extension section of the injection passage 22 is fitted into one end of the inner passage 12 of the valve housing 10 in a state of communication, and the other end protrudes outward from the valve housing ( 10) connection can be set on the side.

And, inside the injection passage 22, as shown in FIG. 2, an injection hole 24 is formed in a state corresponding to the side of the injection valve 30 to be described later.

For example, the injection hole 24 may be formed in a passage section of the injection passage 22 as shown in FIG. 2 and have a smaller hole size than the circumference of the passage.

The valve plug 20 may be installed, for example, connected to the valve housing 10 side by way of coupling female and male threads 26 as shown in FIG. 2, and a conventional ring member for airtightness on the coupling gap side 28) can be installed.

The injection valve unit 30 includes a check valve 32 and is connected to the valve plug 20 side to allow opening and closing operation in a state consistent with the injection and charging of the fuel G on the valve housing 10 side. is formed

As shown in FIG. 2, the check valve 32 is disposed so as to be able to open and close the injection passage 22 inside the valve plug 20, and feeds the fuel G in one direction by the support 34 and the elastic member 36. It is formed and set to open and close in a state consistent with injection charging.

That is, as shown in FIG. 3, the check valve 32 is disposed so that it can be opened and closed while being supported on the side of the support 34 from the side of the injection passage 22 of the valve plug 20, and the elastic member 36 It can be set to be opened and closed in a state of elastically blocking the injection hole 26 side of the injection passage 22 by the.

As shown in FIG. 3, the support 34 has a support hole 34a through which the check valve 32 is supported, and a passage 34b through which the fuel G passes, and the circumferential side has a valve plug ( 20) may be installed on the side of the injection passage 22 in a conventional male and female threaded portion 38 coupling method.

The elastic member 36 may use, for example, a compression coil spring, and, as shown in FIGS. 2 to 3, the check valve 32 side is elastically pushed from the support 34 side to inject the fuel G in one direction. It is set to induce valve opening/closing operation in a state consistent with charging.

The injection valve unit 30 is fuel ( G) of injection filling can be made.

The valve unit 40 for blocking includes a cut valve 42 and a cut disk 44, and is formed on the side of the valve housing 10 in a state in which overcharging blocking is possible and can be operated during injection and charging of the fuel G do.

As shown in FIG. 2, the cut valve 42 is disposed apart from the valve unit 30 for injection within the inner passage 12 section of the valve housing 10 and slides along the passage section, and the cutoff operation is performed. set to be possible

A flange-shaped blocking portion 42a is formed on the side of the cut valve 42, and the blocking portion is formed on the valve seat portion 16 side formed stepwise between the inner passage 12 and the inflow hole 14 of the valve housing 10. (42a) It is set so that blocking or unblocking operation is performed while sliding in a state where the sides face each other.

The cut disk 44 has a disk groove 44a and is rotatably disposed inside the valve housing 10 about the rotation shaft 44b, as shown in FIG. 2, the end side of the cut valve 42 is a disk. It is set in a state where it can come into contact with the circumference side.

Although not shown in the drawing, the cut disk 44 is connected to the fuel filling gauge side installed on the outer surface of the valve housing 10 in a forward and reverse direction around the axis of the rotation shaft 44b according to the amount of fuel G charged. is set to rotate.

That is, the cut disk 44 rotates so that the end side of the cut valve 42 can be fitted into the disk groove 44a side as shown in FIG. 4 when the full state is indicated by the fuel filling gauge. is set

Then, when the end side of the cut valve 42 is inserted into the disk groove 44a side of the cut disk 44 in this way, the valve seat 42a side of the inner passage 12 is moved by the forward movement of the valve. A blocking operation can be induced in the state of facing the part 16 side.

Meanwhile, the injection guide part 50 is formed on the side of the valve housing 10 so as to guide the injection flow of the fuel G in a sliding operation in association with the injection valve part 30 side.

In particular, the injection guide unit 50 guides the injection flow of the fuel G, but protects the side of the blocking valve unit 40 from fluid (fuel) pressure or contact interference, and covers the side of the flow type that matches this. It is formed to have a structure capable of securing a flow path.

The injection guide unit 50 includes a flow guide sphere 52 and an elastic member 54 for induction, as shown in FIGS. 2 and 5, and is an injection valve unit on the inner passage 12 side of the valve housing 10. It is disposed between the (30) and the blocking valve unit 40, and is set to enable sliding operation toward the blocking valve unit 40 side by the injection pressure of the fuel (G).

The flow guide sphere 52 includes a guide passage 52a for guiding the injection flow of the fuel G, and a first guide groove 52b and a second guide groove 52c for covering the cut valve 42 side. It is made by providing

In the guide passage 52a, as shown in FIG. 5, when the cylindrical flow guide sphere 52 is disposed on the inner passage 10 side of the valve housing 10, the fuel G passes through the inner circumference of the passage and the outer circumference of the guide sphere. It is formed to form a flow path section that can be supplied toward the inlet hole 14 in a state passing therebetween.

For example, the guide channel 52a may be formed to have a passage section of a surface-processed form in the longitudinal direction of the guide sphere at the outer circumferential side of the circumference of the cylindrical flow guide sphere 52 .

The guide passages 52a may be spaced apart from each other on the outer circumferential surface of the circumference of the cylindrical flow guide sphere 52 and formed at two or more points.

The first guide groove 52b and the second guide groove 52c may extend concentrically from one end side of the flow guide sphere 52 toward the other end side in the longitudinal direction.

The first guide groove 52b is fitted so that one end side in the longitudinal direction of the cut valve 42 can be supported and covered in association with the sliding motion of the flow guide sphere 52, and the second guide groove 52c is a cut valve ( The blocking portion 42a side of 42) is formed to have a shape of a groove that can be fitted in a cover.

In addition, a hooking protrusion 52d is formed at the boundary between the first guide groove 52b and the second guide groove 52c, and the hooking protrusion 52d has an end side of the cut valve 42 in the first guide groove. (52b) It is formed so as to be able to suppress the phenomenon of separation to the outside of the groove part in the state of being fitted into the side by engaging contact.

The elastic member 54 for induction may use, for example, a compression coil spring, in a state in which the end side of the cut valve 42 can be elastically pushed toward the blocking direction from the inside of the groove of the first guide groove 52b. is set

The injection guide portion 50 can guide the injection flow of the fuel G in a state in which the cut valve 42 is protected and covered in a state disposed on the inner passage 12 side of the valve housing 10. there is.

For example, as shown in FIG. 6, when the fuel G is injected into the inner passage 12 of the valve housing 10 by the opening operation of the injection valve 30, the cut valve 42 is a cut disc. (44) A state in which the blocking release state is maintained while the end portion is supported on the circumference side, and the flow guide sphere 52 is in contact with the valve seat portion 16 side while sliding in the injection direction by the injection pressure of the fuel G is moved to

At this time, the end of the cut valve 42 and the blocking portion 42a are covered in a state of being wrapped by the first guide groove 52b and the second guide groove 52c, and the guide passage 52a is the valve seat portion. It is positioned in a guideably moved state so that the injection flow of fuel G is guided between (16) and the blocking portion (42a).

Then, the fuel G injected into the inner passage 12 of the valve housing 10 may be injected and charged while being supplied to the inlet hole 14 through the guide passage 52a.

In particular, according to the action of the flow guide sphere 52, when the fuel G is injected, the end of the cut valve 42 and the blocking portion 42a side form the first guide groove 52b and the second guide groove 52b as shown in FIG. Since it can be covered while being inserted into the guide groove 52c side, the cut valve 42 side can be maximally protected from the injection pressure of the fuel G or contact interference.

That is, the flow guide sphere 52 guides a flow passage section capable of protecting the cut valve 42 from the pressure or contact interference of the fuel G while moving in a state corresponding to whether or not the fuel G is injected. It can be easily formed by the flow path 52a.

Also, in a state in which the fuel G is injected and charged, the cut valve 42 is operated in a state in which a cut-off operation is induced by the cut disk 44 .

That is, when the cut disk 44 is rotated according to the injection charge state of the fuel G and the disk groove 44a side is located at a point coincident with the end side of the cut valve 42, as shown in FIG. 7, the cut The valve 42 moves in a state where the valve end side is fitted into the disc groove 44a side by the elastic member 54 for guidance.

Then, the inlet hole 14 of the inner passage 12 in a state in which the blocking portion 42a side of the cut valve 42 is in close contact with the valve seat portion 16 side of the inner passage 12 of the valve housing 10 side is blocked, thereby preventing overcharging of the fuel (G).

Referring to FIG. 2 , the valve device having a fuel overfill prevention structure according to an embodiment of the present invention may further include a release guide part 60 corresponding to the blocking valve part 40 side.

The release inducing unit 60 is formed to have a structure capable of inducing a blocking release operation of the blocking valve unit 40 .

In particular, the release inducing portion 60 is formed to induce a blocking release operation of the cut valve 42 in a manner inducing uniform distribution of the atmospheric pressure within the inner passage 12 section of the valve housing 10 .

As shown in FIG. 2, the releasing guide 60 includes a guide groove 62 formed on the side of the cut valve 42 and an elastic member 64 for elastically pushing the side of the cut valve 42 in the direction of releasing the block. made available

The guide groove 62 is formed inside the circumference of the cut valve 42, as shown in FIG. 2, at the opposite end of the inlet hole 14 with the blocking part 42a interposed between both ends in the valve longitudinal direction. It may be formed in the form of a groove extending toward the other end side.

And, in the extended section of the guide groove 62, as shown in FIG. 2, an auxiliary hole 66 is formed through the circumferential side of the cut valve 42 and communicated with the groove portion.

The auxiliary hole 66 is formed in the extension section of the guide groove 62, and is a blocking portion 42a of both ends in the valve length direction of the cut valve 42 disposed on the inner passage 12 side of the valve housing 10 It may be through-formed at a point biased toward the inlet hole 14 with the in-between.

The release elastic member 64 may use, for example, a compression coil spring, and is disposed on the inner passage 12 side of the valve housing 10, and the cut valve 42 side is the flow guide sphere 52 side. It is set in a state in which it can be pushed elastically toward.

After the cut valve 42 side of the blocking valve unit 40 is operated to enable overcharge blocking as shown in FIG. there is.

That is, when the cut valve 42 side is blocked on the inner passage 12 side of the valve housing 10, the atmospheric pressure generated within the inner passage 12 section with the shutoff part 42a of the valve interposed therebetween. A phenomenon in which the device is locked in a blocked state due to a deviation occurs.

At this time, the atmospheric pressure in the section of the inner passage 12 is uniformly distributed while the atmospheric pressure deviation is released through the side of the auxiliary hole 66 and the guide groove 62 .

Then, as the atmospheric pressure deviation in the section of the inner passage 12 is released, the cut valve 42 slides in the blocking releasing direction by the elastic force of the elastic member 64 for releasing, as shown in FIG. 8, and is positioned at the blocking releasing point. As a result, the inner passage 12 can be switched to a blocking release state.

Therefore, the release inducing unit 60 can guide the cut valve 42 side of the blocking valve unit 40 to be smoothly switched to the blocking releasing state after the blocking operation is performed. Operational stability and reliability can be further improved.

Therefore, the present invention not only can easily inject and charge fuel (G) such as LPG to the fuel tank (T) side in a state in which overcharge prevention is possible, but also suppresses deformation or damage of the overcharge prevention system as much as possible, especially among valve components It is possible to provide a stable valve device structure capable of

10: valve housing 20: valve plug
30: injection valve unit 40: shutoff valve unit
50: injection guide unit 60: release guide unit
G: gas fuel T: fuel tank

Claims (9)

a valve housing connected to the fuel tank side and having an internal passage for injection and charging of gaseous fuel;
a valve plug having an injection passage and formed on the valve housing side in a state in which the injection passage side is connected to communicate with the inner passage side of the valve housing;
an injection valve unit provided with a check valve disposed on the injection passage side of the valve plug and capable of opening and closing in a state consistent with injection and charging of gas fuel;
a shut-off valve unit provided with a cut valve and a cut disc disposed to correspond to the inner passage side of the valve housing and formed to open and close to block overcharging according to the amount of gas fuel injected; and
An injection guide portion formed to secure a fluid flow path for injection and charging of gas fuel while sliding in association with the opening and closing operation of the injection valve portion and covering the cut valve side of the blocking valve portion;
Valve device having a fuel overfill prevention structure comprising a. The method of claim 1,
The blocking valve unit,
A valve device having a fuel overfill prevention structure in which a sliding motion is induced in a state in which the cut valve side blocks the inner passage side of the valve housing in association with the rotational motion of the cut disk. The method of claim 2,
The cut valve,
A valve device having a fuel overfill prevention structure in which a blocking portion is formed between both ends in the longitudinal direction of the valve, and the blocking portion is formed so that the blocking portion is formed in a state in which the blocking portion is in close contact with the valve seat portion formed on the inner passage side of the valve housing. . The method of claim 1,
The injection guide part,
It is provided with a flow guide sphere and an elastic member for induction, and is disposed between the injection valve part and the blocking valve part on the inner passage side of the valve housing, and the flow guide part slides by the injection pressure of gas fuel. A valve device having a fuel overfill prevention structure that is set to enable securing of a fluid flow path while covering the cut valve side of the blocking valve unit. The method of claim 4,
The flow guide sphere,
It has a cylindrical circumferential portion corresponding to the inner passage of the valve housing, a guide passage for securing a fluid flow path is formed on the outer circumferential side of the circumference, and a first guide groove for covering and supporting the cut valve is formed inside the circumference. and a fuel overfill prevention structure in which a second guide groove is formed. The method of claim 5,
The guide passage,
A fuel overfill prevention structure formed to secure a fluid flow path matching the cover of the cut valve while guiding the injection flow of gas fuel between the outer circumferential surface of the flow guide sphere and the inner circumferential surface of the inner passage of the valve housing. Valve device having a structure. The method of claim 5,
The first guide groove and the second guide groove,
A valve device having a fuel overfill prevention structure that extends inside the circumference of the flow guide sphere in a state of being concentric with each other from one end side of the flow guide sphere toward the other end side in the longitudinal direction of the flow guide sphere. The method of claim 1,
The valve device having the fuel overfill prevention structure,
Further comprising a release guide portion corresponding to the blocking valve portion side,
The release guide unit,
A valve device having a fuel overfill prevention structure including a guide groove formed inside the valve circumference of the cut valve and a release elastic member for elastically pushing the cut valve side in a blocking release direction. The method of claim 8,
The guide groove,
It is formed extending from one end of the valve longitudinal direction toward the other end of the cut valve, and an auxiliary hole is formed in a state in which an auxiliary hole is formed in communication with the groove side through the valve circumference within the groove extension section A valve device having a fuel overfill prevention structure .

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