KR20130012542A - Valve gear - Google Patents

Abstract

PURPOSE: A valve apparatus is provided to restrict an increase in frictional force between the inner wall of a cylinder and the sliding surface of a main valve. CONSTITUTION: A valve apparatus(1) comprises a cylinder(2), a main valve(3), a pressing unit, a first fluid path(6), a second fluid path(7), a valve sheet member(8), a third fluid path(8), and an operating valve(13). The valve sheet member is separated from the main valve, and allows fluid to flow in and out between the first and second fluid paths. The third fluid path is linked to a first air space. The third fluid path comprises the operating valve which controls the inflow and outflow of the fluid. The main valve comprises an annular ring which has a bias cut surface. The main valve allows the fluid to flow in and out between the first and second air areas through the gap between the annular ring and the gap. The first fluid path is connected to the inside of a fuel tank, and the second fluid path is connected to the fuel pump of an engine. The third fluid path is connected to the second fluid path, and the opening valve is an electric valve.

Description

Valve device {VALVE GEAR}

TECHNICAL FIELD This invention relates to the valve apparatus which controls the inflow and outflow of a fluid by the slide movement of a main valve.

For example, a fuel tank for storing liquefied gas fuel such as liquefied petroleum gas (hereinafter referred to as LPG) or dimethyl ether (hereinafter referred to as DME) is provided with an overcharge preventing device or a fuel supply device. have.

As the valve device applied to the overcharge preventing device and the fuel supply device described above, for example, as in Patent Document 1, by operating and controlling the solenoid valve, the balance of the forces acting from both sides of the slide moving direction on the main valve is changed. It is proposed to slide the main valve so that the fuel in the fuel tank can be converted into a state that can be supplied out of the fuel tank and into a state that cannot be supplied.

WO2010 / 146968 Publication

Since the valve device such as the overcharge preventing device or the fuel supply device performs a desired action by the slide movement of the main valve, the main valve needs to slide smoothly in accordance with the operation of the operation valve and the solenoid valve. Therefore, a lightweight resin is applied to the main valve so as to be responsive to the operation of the operation valve and the solenoid valve and to be able to slide smoothly. However, since the main valve is exposed to the fluid, in the case of the resin main valve, a change in dimensions such as swelling or shrinkage is likely to occur due to the fluid used, which may cause a decrease in the slide mobility of the main valve. do. For example, when the above-mentioned DME fuel is stored in a fuel tank provided with an overcharge preventing device or a fuel supply device in which a resin main valve is disposed, the main valve is swollen by being exposed to the DME fuel, and a dimensional change occurs. It is easy to produce said slide mobility fall. As a result, the function as a valve device for controlling the inflow and outflow of the fluid is deteriorated.

The present invention provides a valve device capable of more appropriately exhibiting a function of controlling the inflow and outflow of a fluid by suppressing a drop in the slide mobility of the main valve caused by the dimensional change caused by the fluid to be used.

The valve device of the present invention is a cylindrical cylinder having an internal air space and a plate-shaped main valve which is arranged to be slidably movable in the internal air space of the cylinder and divides the internal air space into a first air space and a second air space. A main valve installed to communicate the first air space and the second air space through a gap with an inner wall surface of the cylinder, and the first air space from the first air space to the second air space along the slide movement direction of the main valve; Pressurizing means for pressurizing the main valve, a first flow path connected to a second air space and communicating with the second air space, a second flow path connected to the second air space and communicating with the second air space; And the valve provided so that the main valve does not slide to the second airspace side from the contact position by abutting the main valve that slides to the second airspace side. A seat member, wherein the main valve is configured to prevent flow of fluid between the first flow path and the second flow path while the main valve is in contact with the valve seat member, and between the second flow path and the first airspace. Wherein the fluid cannot flow in and out through a gap between the main valve and the inner wall surface of the cylinder, and between the first flow path and the first airspace while the main valve is in contact with the valve seat member. It is configured to flow in and out through the gap between the main valve and the inner wall surface of the cylinder, and between the first flow path and the second flow path in a state in which the main valve is spaced apart from the valve seat member. A valve seat member configured to allow fluid to flow in and out, and a third oil connected to the first air space and in communication with the first air space. And a valve provided with an actuating valve for converting the third flow path into a state in which the fluid can flow in and out, and wherein the main valve comprises: a groove formed in a slide moving surface facing the inner wall surface of the cylinder; An annular ring made of resin interposed between the groove and the inner wall surface of the cylinder, which is bias cut and has an annular ring arranged so that the bias cut faces face each other, and the annular ring and the groove It is characterized in that the fluid is installed so as to flow in and out between the first airspace and the second airspace through the gap.

In the valve apparatus of such a structure, the balance of the force acting on the main valve, such as the fluid pressure of the 1st airspace and the 2nd airspace, or the pressing force by a pressurizing means changes, and the main valve slides in a cylinder, and the 1st flow path and Outflow and inflow of the fluid is controlled between the second flow path. That is, when the third flow path is converted into a state in which the fluid can flow in and out by the operation valve, the pressure of the fluid generated in the first air space is opened to the outside of the cylinder through the third flow path. In this state, when the force acting on the main valve by the internal pressure of the first flow path and the internal pressure of the second flow path becomes larger than the pressing force of the pressurizing means, the main valve slides to the first airspace side and the first flow path through the second airspace. The fluid can flow in and out between the and the second flow path. On the other hand, when the third flow path is converted into a state in which the fluid cannot flow in and out by the operation valve, the internal pressure of the first air space and the internal pressure of the first flow path side of the second air space are almost reduced through the gap between the main valve and the inner wall surface of the cylinder. Become the same. In this state, when the internal pressure of the first flow path side is higher than the internal pressure of the second flow path side of the second airspace, the main valve is necessarily increased in force from the first airspace side to the second airspace side. In contact with the valve seat member without sliding to the first airspace side, the outflow of the fluid from the high pressure first flow path to the low pressure second flow path becomes impossible. Moreover, when the internal pressure of the 2nd flow path side is higher than the internal pressure of the 1st flow path side of a 2nd air space in the state which a fluid cannot flow in and out of a 3rd flow path by an operation valve, the internal pressure of a 1st flow path and the internal pressure of a 2nd flow path. When the force acting on the main valve becomes larger than the pressing force of the pressurizing means, the main valve slides to the first airspace side, and the fluid can flow out from the high pressure second flow path to the low pressure first flow path.

In the valve device, the resin main valve is formed between the first air space and the second air space through a gap between the slide moving surface of the main valve and the inner wall surface of the cylinder, and a gap between the annular ring and the groove. It is installed to allow the fluid to flow in and out. Here, since the annular ring is bias cut, even if swelling or shrinkage due to the working fluid occurs, the dimensional change in the peripheral direction cannot be suppressed, but the dimensional change in the radial direction can be reduced. Thereby, increase of the frictional force by the contact of the annular ring and the inner wall surface of a cylinder can be suppressed, and the fall of the slide mobility of the said main valve can be suppressed. Moreover, in this valve apparatus, the degree of inflow and outflow of fluid between the first air space and the second air space is adjusted by adjusting the gap between the annular ring and the groove of the main valve, and the slide moving surface of the main valve and the inner wall surface of the cylinder. The clearance gap with is used as a fluid flow path. As a result, the gap between the slide moving surface of the main valve and the inner wall surface of the cylinder can be set to a dimension having a margin for swelling or contraction of the main valve due to the working fluid. The increase in the frictional force due to the contact of the can be suppressed, and the decrease in the slide mobility of the main valve can be suppressed. As mentioned above, according to the valve device of this invention, the fall of the slide mobility of a main valve can be suppressed, and the function which controls outflow and outflow of said fluid can be exhibited more appropriately.

In the valve device of the present invention described above, the valve device provided in the fuel tank, the first flow path is installed to communicate with the fuel tank, the second flow path is installed to communicate with the fuel pump of the engine, the third flow path is It is proposed that the configuration is provided so as to communicate with the second flow path, and the actuating valve is configured as a solenoid valve.

The valve device of such a structure can switch to supply and stop of supply of the fuel supplied to the fuel pump of an engine by operation control of the operation valve which is an electromagnetic valve.

As described above, the valve device of the present invention converts the third flow path into a state in which the fluid can flow in and out of the state by means of an actuating valve, so that the force acting on the main valve from the first airspace side and the second airspace side from the second airspace side. A valve for controlling the outflow and inflow of fluid between the first flow path and the second flow path by varying the balance of the acting force and sliding the main valve in contact with the valve seat member or away from the valve seat member. An apparatus, wherein the main valve flows in and out of a fluid between a first air space and a second air space through a gap between a bias cut annular ring and a groove and a gap between a slide moving surface of the main valve and an inner wall surface of a cylinder. It is installed to be possible. Since the annular ring bias-cut can reduce the dimensional change in the radial direction caused by swelling or shrinkage due to the working fluid, it is possible to suppress an increase in frictional force due to contact between the annular ring and the inner wall surface of the cylinder. . In addition, since the clearance between the slide moving surface of the main valve and the inner wall surface of the cylinder can be set to a dimension having a margin for swelling or contraction of the main valve by the working fluid, the slide moving surface of the main valve and the inner wall surface of the cylinder It is possible to suppress an increase in the frictional force due to contact with. By suppressing the increase in the frictional force, a decrease in the slide mobility of the main valve can be suppressed, and the function of controlling the inflow and outflow of the fluid can be more appropriately exhibited.

FIG. 1: is explanatory drawing which showed the valve apparatus 1 of Example 1. FIG.
2 is an explanatory diagram showing a state of a force acting on the main valve 3.
3 is an explanatory view showing a state in which fluid flows from the first flow passage 6 to the second flow passage 7 by opening the operation valve 13.
FIG. 4 is an explanatory diagram showing a state when the valve is closed with the actuating valve 13 in a state where fluid flows from the first flow passage 6 to the second flow passage 7.
5 is an explanatory view showing a state in which the fluid cannot flow out from the first flow passage 6 to the second flow passage 7 by closing the operation valve 13.
6A is a side view of the main valve 3 illustrating the annular ring 17 before being swollen and (B) is the annular ring 17 after being swollen.
7 is a fuel supply device 21 according to the second embodiment, where (A) is a longitudinal cross-sectional view and (B) is a cross-sectional view.

Example 1

In the valve device 1 of the first embodiment, as shown in FIG. 1, a plate-shaped main valve 3 is slidably disposed in an internal space of a cylindrical cylinder 2 so that the main valve 3 is moved by the main valve 3. The internal airspace is divided into a first airspace (4) and a second airspace (5). In addition, the cylinder 2 includes a tubular first flow passage 6 communicating with the second airspace 5, a tubular second flow passage 7 communicating with the second airspace 5, and a first airspace ( The tubular third flow passage 8 communicating with 4) is connected to each other. Moreover, the valve seat member 9 which the main valve 3 which slides to the said 2nd airspace 5 side abuts is formed in the 2nd airspace 5 side of the cylinder 2, and the said valve seat member 9 The doorway of the said 2nd flow path 7 is comprised. The main valve 3 is brought into contact with the valve seat member 9 so that the main valve 3 cannot slide to the second airspace 5 side from this contact position, and at the same time, the entrance and exit of the second flow path 7 is opened. It can be closed to restrict the inflow and outflow of fluid into the second flow path (7). Moreover, the valve apparatus 1 is provided with the operation valve 13 which converts and operates the 3rd flow path 8 to the open state which can flow in and out of a fluid, and the closed state which cannot flow out.

The main valve 3 is formed in a cylindrical shape and formed of a resin material. The main valve 3 is set to the dimension which can be slidably moved in the internal space of the cylinder 2. In addition, the groove 16 is formed in the slide movement surface 3a of the main valve 3, and the annular ring made of resin is formed between the groove 16 and the inner wall surface 2a of the cylinder 2. 17) is installed. The annular ring 17 is arranged so that the bias cut and bias cut faces face each other. The gap between the main valve 3 and the inner wall surface 2a of the cylinder 2 and the gap between the annular ring 17 and the groove 16 are defined by the first air space 4 and the second air space 5. It is comprised as the flow path 11 which flows in and out of a fluid, and this flow path 11 is formed over the whole periphery of the main valve 3. In addition, the main valve 3 is pressurized toward the valve seat member 9 side by the elastic spring 10 provided in the first air space 4.

The valve device 1 according to the first embodiment configured as described above has the fluid pressure and the elastic spring of the first air space 4 and the second air space 5 (the first flow path 6 and the second flow path 7). When the balance of the force acting on the main valve 3 called the pressing force by 10 changes, the main valve 3 slides in the cylinder 2, and the 1st flow path 6 and the 2nd flow path 7 are changed. Control the inflow and outflow of fluid between and. The state of the force acting on the main valve 3 is shown in FIG. In FIG. 2, the solid arrow indicates the flow of fluid, and the arrow of discoloration indicates the force acting on the main valve 3. As shown in FIG. 2, the main valve 3 has an upward force due to the fluid pressure in the first flow path 6, an upward force due to the fluid pressure in the second flow path 7, and a first air space 4. The downward force due to the fluid pressure of the force, the downward force by the elastic spring 10 acts.

Next, the operation | movement which the valve apparatus 1 controls outflow of the fluid which flows from the 1st flow path 6 side to the 2nd flow path 7 side is demonstrated.

In FIG. 3, the state which the fluid flows from the 1st flow path 6 to the 2nd flow path 7 by opening the operation valve 13 is shown. In this state, since the first air space 4 is opened through the third flow path 8, the downward direction acting on the main valve 3 by the fluid pressure of the first air space 4 and the elastic spring 10. Compared with the force of, the upward force acting on the main valve 3 is increased by the fluid pressure of the first flow path 6 and the fluid pressure of the second flow path 7. As a result, the main valve 3 slides toward the first air space 4, and the fluid flows from the first air passage 6 to the second air passage 7 through the second air space 5.

Next, FIG. 4 shows a state when the valve is closed by the actuating valve 13 in the state where the fluid flows from the first flow passage 6 to the second flow passage 7 in this way. In this state, when the operation valve 13 is closed, the fluid pressure of the first air space 4 is caused by the fluid flowing into the first air space 4 from the second air space 5 through the flow path 11. As it rises, the fluid pressure of the said first air space 4 and the fluid pressure of the 1st flow path 6 become substantially equal. In addition, since the fluid pressure of the second flow path 7 which is the downstream side of the fluid is lower than the fluid pressure of the first flow path 6, the fluid pressure of the first air space 4 acts on the main valve 3. The downward force is larger than the upward force acting on the main valve 3 by the fluid pressure between the first flow path 6 and the second flow path 7. As a result, the force acting in the downward direction becomes large and the main valve 3 slides downward.

In this way, when the main valve 3 slides downward, the main valve 3 abuts against the valve seat member 9, and fluid flows from the first flow passage 6 to the second flow passage 7. It becomes impossible. Thus, FIG. 5 shows a state in which the fluid is prevented from flowing out from the first flow passage 6 to the second flow passage 7 by closing the operation valve 13. In this state, since the fluid flows in and out of the first flow path 6 and the first air space 4 through the flow path 11, even if the fluid pressure of the first flow path 6 changes, The fluid pressure and the fluid pressure of the first flow path 6 are approximately equal. Therefore, as long as the fluid pressure of the 2nd flow path 7 is lower than the fluid pressure of the 1st flow path 6, the main valve 3 by the fluid pressure of the 1st flow path 6 and the 2nd flow path 7 is carried out. Compared to the upward force acting on the force), the downward force acting on the main valve 3 is always increased by the fluid pressure of the first airspace 4 and the pressing force of the elastic spring 10. Thereby, since the state which the main valve 3 contact | connects the valve seat member 9 continues, fluid cannot flow out from the 1st flow path 6 to the 2nd flow path 7.

As described above, according to the valve device 1 of the first embodiment, the first flow path 6 is formed by opening and closing the operation valve 13 to change the balance of the force acting on the main valve and sliding the main valve 3. ), The inflow and outflow of the fluid flowing into the second flow path 7 can be controlled.

In such a valve device 1, the main valve 3 and the annular ring 17 are exposed to the fluid. 6A is a side view of the main valve 3 illustrating the annular ring 17 before swelling and (B) illustrating the annular ring 17 after swelling. The annular ring 17 is bias-cut to be inclined with respect to the slide movement direction and cut in the circumferential direction. Therefore, the annular ring 17 cannot suppress the dimensional change in the circumferential direction when it is swollen by being exposed to the fluid, but can reduce the dimensional change in the radial direction. Thereby, increase of the frictional force by the contact of the annular ring 17 and the inner side wall surface 2a of the cylinder 2 can be suppressed, and the fall of the slide mobility of the main valve 3 can be suppressed. In addition, since the degree of the flow in and out of the fluid flowing through the flow path 11 affects the degree of change in the fluid pressure applied to the main valve 3 when the actuating valve 13 is switched to the open state or the closed state, It affects the slide mobility of the main valve (3). Here, in the valve device 1 of the first embodiment, the gap between the slide moving surface 3a of the main valve 3 and the inner wall surface 2a of the cylinder 2 is simple among the gaps constituting the flow path 11. It is assumed that the gap between the annular ring 17 and the groove 16 of the main valve 3 is used to adjust the degree of flow in and out of the fluid flowing through the flow path 11. Therefore, the clearance between the slide movement surface 3a of the main valve 3 and the inner wall surface 2a of the cylinder 2 has little influence on the slide mobility of the main valve 3, and the main valve (the It is set to the dimension with a space with respect to swelling and shrinkage of (3). Thus, when the main valve 3 made of resin is swollen by being exposed to the fluid, the sliding movement surface 3a of the main valve 3 is brought into contact with the inner wall surface 2a of the cylinder 2. The increase in the frictional force can be suppressed, and the drop in the slide mobility of the main valve 3 can be suppressed. Therefore, the valve device 1 according to the first embodiment suppresses the slide mobility of the main valve 3 and controls the inflow and outflow of the fluid flowing from the first flow passage 6 to the second flow passage 7. Can be used more appropriately.

In the valve device 1, the fluid flows from the first flow passage 6 to the second flow passage 7 by closing the operation valve 13 and bringing the main valve 3 into contact with the valve seat member 9. When the actuating valve 13 is opened in a state where it is disabled, in order to space the main valve 3 from the valve seat member 9, a force exceeding the pressing force of the elastic spring 10 is applied to the first flow path 6. It is necessary to add from the side. At this time, the wider the flow path 11, the more easily the fluid on the first flow path 6 flows out to the first airspace 4 side, so that the fluid pressure on the first flow path 6 side tends to be lowered, and thus the main valve. (3) the power to push up weakens. On the contrary, the narrower the flow path 11, the more easily the fluid on the first flow path 6 flows out to the first airspace 4 side, so that the fluid pressure on the first flow path 6 side does not easily decrease, so that the main valve ( 3) It can suppress the weakening force of pushing up. In other words, the narrower the passage 11, the easier the main valve 3 is to operate. However, as the flow path becomes narrower, foreign matter is easily clogged, and when the foreign matter is blocked, the function as a valve device is deteriorated. However, in the valve device 1 of the first embodiment, since the flow passage 11 is formed over the entire circumference of the main valve 3, the first air space (1) in the main valve 3 is replaced with the main valve 3. Compared with the configuration in which the orifice hole is formed as a flow path for fluid flowing in and out between 4) and the second air space 5, the function of the valve device caused by clogging of foreign matter mixed in the fluid is blocked. It is advantageous against. This is because it is considered that the possibility that one orifice hole is clogged with foreign matter is higher than the possibility that the flow passage 11 is clogged with foreign matter over the entire circumference. Therefore, in the valve apparatus 1 of Example 1, the flow path 11 can be made relatively narrow, and when opening the operation valve 13, the main valve 3 can be operated easily, and the 1st flow path The function of controlling the inflow and outflow of the fluid which flows from (6) to the 2nd flow path 7 can be exhibited more suitably. Moreover, the influence on the slide mobility of the main valve 3 is not narrowed without narrowing the clearance gap between the main valve 3 and the inner wall surface 2a of the cylinder 2 which are likely to affect the slide mobility of the main valve 3. Since the flow path 11 is narrowed by adjusting the clearance between the annular ring 17 and the groove 16 which are not easily generated, the main valve 3 can be easily operated while suppressing the drop in the slide mobility of the main valve 3. The function which controls the outflow and inflow of the fluid which flows from the 1st flow path 6 to the 2nd flow path 7 can be exhibited more suitably.

[Example 2]

Embodiment 2 is a fuel supply device 21 having a configuration as a valve device that is the same as the valve device 1 of Embodiment 1 described above. The fuel supply device 21 is installed in a fuel tank installed in a vehicle such as a track powered by an engine driven by liquefied gas fuel, and is connected to a fuel pump for supplying fuel to the engine. And the fuel supply apparatus 21 is for controlling the liquefied gas fuel supplied to a fuel pump. Here, for example, LPG (liquefied petroleum gas) fuel or DME (dimethyl ether) fuel is used as the liquefied gas fuel.

In the fuel supply device 21, as shown in FIG. 7, a cylinder 22, a first flow path 26, a second flow path 27, and a third flow path 28 are formed in the apparatus main body 20. And the 1st flow path 26 communicates with the inside of a fuel tank, and the 2nd flow path 27 is connected to the fuel pump. The main valve 23 is arrange | positioned so that a slide movement is possible in the internal space of the cylinder 22, and the 1st air space 24 and the 2nd air space 25 are divided by the said main valve 23. As shown in FIG. The first air passage 26 and the second flow passage 27 communicate with each other in the second air space 25, and the valve seat member 29 is connected to the second air space 25 at an opening edge to which the second flow passage 27 is connected. It is formed to protrude into. In addition, the third flow passage 28 is formed to communicate the first airspace 24 and the second flow passage 27. And the fuel supply apparatus 21 is equipped with the solenoid valve 33 as an operation valve which converts the 3rd flow path 28 into the open state which liquefied gas fuel can flow in and out, and is unable to flow in and out, and the said solenoid valve ( The control device 39 for controlling the operation 33 is provided. Moreover, the elastic spring 30 is provided in the 1st air space 24, and the main valve 23 is pressurized by the said elastic spring 30 to the 2nd air space 25 side. The main valve 23 has a cylindrical shape formed of a resin material similarly to the first embodiment, and has a groove 36 and an annular ring 37 made of resin that is bias-cut on the slide moving surface that is the outer circumferential surface of the main valve 23. 37). Then, the first air space 24 and the second air space 25 are formed through the gap between the main valve 23 and the inner wall surface of the cylinder 22 or the gap between the groove 36 and the annular rings 37 and 37. The liquefied gas fuel is allowed to flow in and out between the tanks. Here, in the second embodiment, two annular rings 37 and 37 are arranged along the slide moving direction of the main valve 23.

The fuel supply device 21 controls the opening and closing operation of the solenoid valve 33 by the control device 39, so that the liquefied gas fuel is transferred from the first flow path 26 to the second flow path (like the first embodiment described above). 27) an operation for controlling the inflow and outflow to (27) is performed. That is, in the state in which the solenoid valve 33 is opened, the main valve 23 and the valve seat member 29 are separated from each other by the balance of the force acting on the main valve 23 to drive the fuel pump. The liquefied gas fuel in the fuel tank flows from the first flow path 26 to the second flow path 27. On the other hand, in the state where the solenoid valve 33 is closed, the fluid pressure of the 1st air space 24 and the 1st flow path 26 becomes substantially the same, and the internal pressure of the 2nd flow path 27 is driven by the drive of a fuel pump. Since it becomes lower than the internal pressure of the 1st flow path 26, the main valve 23 slides to the 2nd air space 25 side, and it contacts with the valve seat member 29. As shown in FIG. As a result, the liquefied gas fuel from the first flow passage 26 to the second flow passage 27 cannot flow out.

Since the fuel supply apparatus 21 of this Embodiment 2 is equipped with the annular rings 37 and 37 bias-cut by the main valve 23 similarly to Example 1 mentioned above, the annular rings 37 and 37 are In the case where swelling or shrinkage occurs due to exposure to the liquefied gas fuel, the dimensional change in the circumferential direction cannot be suppressed, but the dimensional change in the radial direction can be reduced. Thereby, the increase in the frictional force between the annular rings 37 and 37 and the cylinder 22 can be suppressed, and the fall of the slide mobility of the main valve 23 can be suppressed. Further, the first airspace 24 and the second flow path 27 are formed by the gap between the main valve 23 and the cylinder 22 and the gap between the annular rings 37 and 37 and the groove 36 of the main valve 23. Flow path 31 through which the fluid flows in and out, and the gap between the main valve 23 and the cylinder 22 is used as a simple flow path, and also the gap between the annular rings 37 and 37 and the groove 36. It is used to adjust the degree of inflow and outflow of fluid. Thereby, since the clearance gap between the main valve 23 and the cylinder 22 can be set to the dimension with a space with respect to swelling, shrinkage, etc. of the main valve 23 by liquefied gas fuel, the resin main valve 23 is When swelling, shrinkage, or the like occurs, an increase in the frictional force between the main valve 23 and the cylinder 22 can be suppressed, and a decrease in the slide mobility of the main valve 23 can be suppressed. As described above, according to the valve device of the fuel supply device 21 of the second embodiment, the function of controlling the inflow and outflow of the liquefied gas fuel can be more appropriately exhibited.

In addition, in the fuel supply apparatus 21 of the second embodiment, as in the above-described first embodiment, the flow path 31 is formed over the entire circumference, so that the foreign matter mixed in the liquefied gas fuel is filled in the entire flow path 31. It is thought that there is a low possibility of being clogged around. As a result, the fuel supply device 21 according to the second embodiment is advantageous in degrading the function of the valve device caused by clogging of foreign matters, as compared with the configuration in which the main valve is provided with an orifice hole. You can also narrow it. On the other hand, like the first embodiment described above, the narrower the flow path 31, the easier the main valve 23 is to operate.

And the structure of this Embodiment 2 can make it easy to operate the main valve 23 compared with the structure provided with the orifice hole mentioned above.

In the structure of Example 1, Example 2 mentioned above, the pressurizing means which concerns on this invention is comprised by each elastic spring 10,30.

The valve device 1 of the first embodiment described above can also be applied to an overcharge preventing device provided in the same fuel tank as the second embodiment to prevent the liquefied gas fuel from being filled in the fuel tank by a predetermined amount or more.

This invention is not limited to the above-mentioned embodiment, It is possible to implement suitably within the scope of the meaning of this invention also about the structure other than an Example.

1: valve device
2, 22: cylinder
2a: inner wall
3, 23: main valve
3a: slide moving surface
4, 24: First Airspace
5, 25: Second Airspace
6, 26: the first euro
7, 27: second euro
8, 28: third euro
9, 29: valve seat member
10, 30: elastic spring pressurizing means
11, 31: Euro
13: operated valve
33: solenoid valve (actuation valve)

Claims (2)

A cylindrical cylinder having an internal air space,
A plate-shaped main valve arranged to be slidably movable in the interior airspace of the cylinder to divide the interior airspace into a first airspace and a second airspace, wherein the first airspace and the second airspace are spaced apart from the inner wall surface of the cylinder; A main valve installed to communicate with airspace,
Pressurizing means for pressurizing the main valve from the first airspace to the second airspace along the slide movement direction of the main valve;
A first flow path connected to the second airspace and in communication with the second airspace;
A second flow path connected to the second airspace and in communication with the second airspace;
A valve seat member provided so that the main valve does not slide toward the second airspace side than the abutted position by abutting the main valve sliding to the second airspace side, wherein the main valve is in contact with the valve seat member. It is configured to prevent the fluid from flowing in and out between the first flow path and the second flow path, and between the second flow path and the first airspace, an inner wall surface of the main valve and the cylinder; The main valve and the cylinder are disposed between the first flow path and the first air space while the main valve is in contact with the valve seat member. It is configured to allow the fluid to flow in and out through the gap with the inner wall surface, the main valve is In the probe sheet member and the spacing (離 隔) state and the second configured to enable flow of said fluid between said second passage and one euros valve seat member,
A third flow path connected to the first airspace and in communication with the first airspace;
A valve device comprising an actuating valve for converting the third flow path into a state in which the fluid can flow in and out,
The main valve is bias cut as a resin annular ring interposed between the groove formed in the slide moving surface facing the inner wall surface of the cylinder and the groove and the inner wall surface of the cylinder. A valve device having an annular ring disposed so that the bias-cut faces face each other, and installed to allow the fluid to flow in and out between the first air space and the second air space through a gap between the annular ring and the groove. . The method of claim 1,
A valve device installed in the fuel tank,
The first flow path is installed to communicate with the inside of the fuel tank,
The second flow path is installed to communicate with the fuel pump of the engine,
The third flow path is installed to communicate with the second flow path,
The actuating valve is configured as a solenoid valve.

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