pressure regulator

Abstract

To provide a pressure regulating device capable of suppressing entry of an extract.SOLUTION: A pressure regulating device 10 mainly comprises a fluid flowing part 11, a fluid regulating part 12 and a wall part 13. Fluid 16 flows within the fluid flowing part 11. The fluid regulating part 12 is disposed in the fluid flowing part 11 and regulates pressure of the fluid 16. The wall part 13 is disposed upstream of the fluid regulating part 12 in a flow of the fluid 16 and is erected from the inner wall of the fluid flowing part 11 to form a wall shape.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a pressure regulating device. [Background technology]

[0002] An example of a conventional invention relating to a pressure adjusting device is disclosed in Patent Document 1.

[0003] In the pressure regulating device described in Patent Document 1, a metal tube extends from a fuel tank, and the pressure regulating device is extended to the metal tube. Vaporized fuel enters the metal tube. When the internal pressure of the fuel tank exceeds a certain level, the pressure regulating device opens, and gas inside the fuel tank is released to the outside through the metal tube.

[0004] In the fuel supply system described above, a steel pipe made of metal was used as the tube for adjusting the pressure in the fuel tank. In recent years, however, resin tubes made of synthetic resin, which are easy to process and cost-effective, have been used instead of the steel pipes. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-169310 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the above-described fuel supply device has room for improvement in terms of safely operating the valve.

[0007] Specifically, extracts extracted from the synthetic resin that makes up the resin tube appear inside the resin tube. These extracts enter the pressure regulating device along with the vaporized fuel. When the extracts enter the pressure regulating device, the operation of the internal mechanism of the pressure regulating device is hindered by the extracts, resulting in a problem of the pressure regulating device not functioning properly.

[0008] The present invention has been made in view of the above problems, and an object of the present invention is to provide a pressure adjusting device that can suppress the intrusion of extracts. [Means for solving the problem]

[0009] The present invention provides a pressure regulating device that regulates the pressure of a fluid flowing therethrough, the pressure regulating device comprising: a fluid flow section through which the fluid flows; a fluid adjustment section disposed within the fluid flow section and adjusting the pressure of the fluid; and a wall section disposed upstream of the fluid adjustment section in the flow of the fluid, the wall section standing in a wall shape from an inner wall of the fluid flow section, The fluid passage portion has a curved portion, and the wall portion is disposed in the curved portion. The present invention provides a pressure regulating device that regulates the pressure of a fluid flowing therethrough, the pressure regulating device comprising: a fluid flow section through which the fluid flows; a fluid adjustment section disposed within the fluid flow section and adjusting the pressure of the fluid; and a wall section disposed upstream of the fluid adjustment section in the flow of the fluid, the wall section standing in a wall shape from an inner wall of the fluid flow section, The fluid circulation portion has a substantially circular cross-sectional shape and is made of synthetic resin, the wall portion has a substantially ring shape from the inner surface of the fluid circulation portion toward the inside, the fluid is a gas, and the wall portion is filled with an extract extracted from the synthetic resin that constitutes the fluid circulation portion. [Effects of the Invention]

[0010] According to the pressure regulating device of the present invention, by having a wall portion erected in a wall shape from the inner wall of the fluid flow portion, even if extractable matter appears inside the fluid flow portion, the wall portion can capture the extractable matter, thereby preventing the extractable matter from progressing to the fluid adjusting portion, preventing the extractable matter from adhering to the fluid adjusting portion, and suppressing malfunction of the fluid adjusting portion. [Brief explanation of the drawings]

[0011] [Figure 1]1 is a schematic diagram illustrating a pressure adjusting device according to an embodiment of the present invention. [Figure 2A] 1 is a schematic diagram showing a tank pressure regulating device provided with a pressure regulating device according to an embodiment of the present invention; [Figure 2B] 2 is a cross-sectional view showing a fluid adjusting section constituting the pressure adjusting device according to the embodiment of the present invention. FIG. [Figure 3] FIG. 10 is a schematic diagram showing a pressure adjusting device according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0012] A pressure adjusting device 10 according to an embodiment of the present invention will be described in detail below with reference to the drawings. In the following description, the same components are generally designated by the same reference numerals, and repeated description will be omitted.

[0013] FIG. 1 is a schematic diagram showing a pressure adjusting device 10. As shown in FIG.

[0014] The pressure regulating device 10 is incorporated into a tank pressure regulating device 18 (described later) in a path through which vaporized fuel passes, and regulates the internal pressure of the fuel tank 20. Specifically, the pressure regulating device 10 mainly includes a fluid circulation section 11, a fluid regulation section 12, and a wall section 13.

[0015] The fluid circulation portion 11 is a conduit through which the fluid 16 flows, and is made of, for example, synthetic resin. A specific shape of the fluid circulation portion 11 is, for example, a substantially cylindrical shape with a substantially circular cross section. For example, synthetic resin can be used as the material of the fluid circulation portion 11. This improves the degree of freedom in the shape of the fluid circulation portion 11 and also reduces costs. The fluid 16 is, for example, a gas, and specifically, vaporized fuel, which will be described later.

[0016] The fluid adjustment unit 12 is disposed inside the fluid circulation unit 11 and adjusts the pressure of the fluid 16. By opening the fluid adjustment unit 12, the fluid 16 can be circulated through the fluid circulation unit 11. On the other hand, by closing the fluid adjustment unit 12, the fluid 16 can be prevented from circulating through the fluid circulation unit 11. The specific configuration of the fluid adjustment unit 12 will be described later with reference to FIG. 2B.

[0017] The wall portion 13 is disposed upstream of the fluid adjustment portion 12 in the flow of the fluid 16, and stands like a wall from the inner wall of the fluid circulation portion 11. Specifically, the wall portion 13 stands from the inner wall of the fluid circulation portion 11 toward the center of the fluid circulation portion 11. When the specific shape of the fluid circulation portion 11 is cylindrical, the wall portion 13 has a substantially ring shape extending from the inner surface of the fluid circulation portion 11 toward the inside.

[0018] By providing the wall portion 13, even if the extract 15 appears inside the fluid circulation portion 11, the wall portion 13 can capture the extract 15. Therefore, even if the extract 15 flows toward the fluid adjustment portion 12 together with the fluid 16, the wall portion 13 captures the extract 15. This prevents the extract 15 from reaching the fluid adjustment portion 12 and prevents the extract 15 from entering the fluid adjustment portion 12. Therefore, malfunction of the fluid adjustment portion 12 can be suppressed.

[0019] In particular, when the fluid circulation portion 11 is made of a synthetic resin and the fluid 16 is a vaporized fuel, as described below, the flow of the fluid 16 through the fluid circulation portion 11 generates an extract 15 inside the fluid circulation portion 11. The extract 15 is, for example, an oligomer or an additive. In this case, if no countermeasure is taken, the extract 15 may enter the fluid adjustment portion 12 and hinder the opening and closing operation of the fluid adjustment portion 12. In this embodiment, the fluid circulation portion 11 is provided with a wall portion 13, which captures the extract 15 and prevents the extract 15 from entering the fluid adjustment portion 12.

[0020] A plurality of walls 13 are formed along the direction in which the fluid 16 flows. Specifically, the wall 13 includes, from the upstream side of the flow of the fluid 16, a wall 131, a wall 132, and a wall 133. The wall 131, the wall 132, and the wall 133 are arranged at approximately equal intervals. In this manner, most of the extract 15 can be captured by the wall 131, the wall 132, and the wall 133, and the amount of the extract 15 entering the fluid adjusting unit 12 can be further reduced.

[0021] The wall portions 131, 132, and 133 can be formed simultaneously when manufacturing the fluid circulation portion 11. That is, the wall portions 131, 132, and 133 are integrally molded from the same synthetic resin as the fluid circulation portion 11. Therefore, the formation of the wall portions 131, 132, and 133 can prevent the manufacturing costs from increasing.

[0022] By forming multiple wall portions 131, 132 and 133 along the direction in which fluid 16 flows, each wall portion 13 can more effectively capture extract 15 and more effectively prevent extract 15 from adhering to fluid adjustment portion 12.

[0023] The wall portion 13 is formed with holes 17 that allow the fluid 16 to flow toward the fluid adjustment portion 12. Specifically, the wall portion 131 is partially penetrated to form the hole 171, the wall portion 132 is partially penetrated to form the hole 172, and the wall portion 133 is partially penetrated to form the hole 173.

[0024] The positions of the holes 17 are different in the multiple wall portions 13. Specifically, a hole 171 is formed in the center of the wall portion 131, a hole 172 is formed in the upper part of the wall portion 132, and a hole 173 is formed in the lower part of the wall portion 133. In this way, the fluid 16 flows in a meandering manner through the holes 171, 172, and 173, and more of the extract 15 is deposited on the main surfaces of the wall portions 131, 132, and 133, thereby reducing the amount of the extract 15 that passes through the wall portions 13.

[0025] 2A is a schematic diagram showing a tank pressure regulating device 18 equipped with the pressure regulating device 10. The pressure regulating device 10 and a fuel tank 20 are mounted on a vehicle such as a passenger car.

[0026] The tank pressure regulating device 18 is a device that regulates the pressure inside the fuel tank 20. The tank pressure regulating device 18 mainly includes a fluid regulating unit 12, a mechanical relief valve 23, a canister 24, a purge valve 25, and the like.

[0027] The evaporated fuel path 191 and the like are pipes that interconnect the various devices that make up the tank pressure regulating device 18, and have the same configuration as the pressure regulating device 10 shown in FIG.

[0028] The fuel tank 20 is a tank for storing fuel. The fuel stored in the fuel tank 20 may be gasoline, diesel, or the like.

[0029] The fuel supply unit 21 is a portion for supplying fuel to the fuel tank 20. When fuel is being supplied to the fuel tank 20, the fuel supply unit 21 is in an open state. In other cases, the fuel supply unit 21 closes the fuel tank 20.

[0030] The mechanical relief valve 23 is a valve provided as a safety valve, and opens when the internal pressure of the fuel tank 20 exceeds a predetermined reference value, thereby releasing gas from inside the fuel tank 20 to the outside, thereby preventing the internal pressure of the fuel tank 20 from rising abnormally.

[0031] The fluid adjustment unit 12 is, for example, a solenoid valve. Closing the fluid adjustment unit 12 seals the fuel tank 20, suppressing the release of vaporized fuel from the fuel tank 20. On the other hand, opening the fuel tank 20 connects the fuel tank 20 to the canister 24. Therefore, the vaporized fuel inside the fuel tank 20 is released to the outside via the canister 24, reducing the internal pressure of the fuel tank 20.

[0032] The canister 24 has an adsorbent made of activated carbon or the like inside it. The canister 24 has the adsorbent, so that it can adsorb the vaporized fuel supplied from the fuel tank 20.

[0033] The filter 22 removes dust particles from the outside air when the outside air is introduced into the fuel tank 20 in order to diagnose a leak in the fuel tank 20 .

[0034] The purge valve 25 controls the supply of fuel to an engine 26, which may be a gasoline engine or a diesel engine. By opening the purge valve 25, the vaporized fuel adsorbed and collected by the canister 24 can be supplied to the engine 26.

[0035] The tank pressure regulating device 18 has evaporated fuel paths 191 to 194 as paths for transporting vaporized fuel that has evaporated inside the fuel tank 20. Here, the upstream side of the flow of vaporized fuel will be simply referred to as the upstream side, while the downstream side of the flow of vaporized fuel will be simply referred to as the downstream side.

[0036] The upstream end of the evaporated fuel path 191 is connected to the fuel tank 20, and the downstream end is connected to the mechanical relief valve 23 and the fluid adjustment unit 12. The fluid circulation unit 11 shown in FIG.

[0037] The upstream end of the evaporated fuel path 192 is connected to the mechanical relief valve 23 and the fluid adjusting unit 12 , and the downstream end is connected to the canister 24 .

[0038] The upstream end of the evaporated fuel path 193 is connected to the canister 24 , and the downstream end is connected to the filter 22 .

[0039] The vapor fuel path 194 has an upstream end connected to the canister 24 and a downstream end connected to the purge valve 25 .

[0040] The upstream end of the evaporated fuel path 195 is connected to the purge valve 25, and the downstream end is connected to the engine .

[0041] 2B is a cross-sectional view showing the fluid adjusting section 12 that constitutes the pressure adjusting device 10. The fluid adjusting section 12 is also called a sealing valve.

[0042] Fluid adjustment unit 12 has a lower housing 121, an upper housing 128, an output shaft 126, a valve guide 123, a valve 124, a sealant 127, and a spring 125. Fluid adjustment unit 12 is disposed between evaporated fuel path 191 and evaporated fuel path 192, and controls the flow of evaporated fuel generated from fuel tank 20 by opening and closing it. Each part constituting fluid adjustment unit 12, except for spring 122, etc., is made of injection-molded synthetic resin or the like.

[0043] The lower housing 121 is a member having a generally lid-like shape with an open top.

[0044] The upper housing 128 is a generally lid-shaped member with an opening at the bottom. The upper housing 128 and the lower housing 121 are assembled together so as to close each other's openings.

[0045] The inner wall portion 129 is a portion of the bottom surface of the lower housing 121 that stands upright in a substantially cylindrical shape.

[0046] The valve guide 123 is a generally cylindrical part that stands upright near the center of the bottom surface of the lower housing 121 .

[0047] The output shaft 126 is a shaft-shaped member inserted into the valve guide 123 from below, and is rotated by the driving force of a motor based on instructions from a control device (not shown), for example.

[0048] The valve 124 has a substantially cylindrical shape, and the valve guide 123 is inserted into the valve 124 .

[0049] The spring 122 is disposed inside the lower housing 121. The lower end of the spring 122 abuts against the lower surface of the lower housing 121, and the upper end of the spring 122 abuts against the valve 124. Inside the fluid adjusting unit 12, the spring 122 biases the valve 124 upward.

[0050] The sealing material 127 is a member having a substantially circular ring shape, and is disposed above the valve 124. The valve 124, biased by the spring 122, abuts against the inside of the lower surface of the sealing material 127. The upper end of the inner wall portion 129 abuts against the outside of the lower surface of the sealing material 127.

[0051] The spring 125 is disposed inside the upper housing 128. The upper end of the spring 125 abuts against the lower surface of the upper housing 128, and the lower end of the spring 125 abuts against the sealing material 127. Inside the fluid adjusting unit 12, the spring 125 urges the sealing material 127 downward.

[0052] When the fluid adjuster 12 is in the closed state, the lower surface of the sealant 127 contacts the upper end of the inner wall 129 in accordance with the displacement of the output shaft 126. In this manner, the evaporated fuel path 191 and the evaporated fuel path 192 shown in FIG. 2A are not in communication with each other. Therefore, evaporated fuel is not supplied from the fuel tank 20 to the canister 24.

[0053] When the fluid adjusting unit 12 is in the open state, the valve 124 and the sealant 127 rise in response to the displacement of the output shaft 126 in the reverse direction. As a result, the lower surface of the sealant 127 moves away from the upper end of the inner wall portion 129, and the fluid adjusting unit 12 enters a communication state.

[0054] The operation of the tank pressure regulating device 18 having the above-described configuration will be described below.

[0055] When the fluid adjusting unit 12 is in the closed state, the evaporated fuel path 191 is blocked, and the pressure inside the fuel tank 20 is maintained.

[0056] Before refueling the fuel tank 20, the fluid adjustment unit 12 is opened to extract the evaporated fuel from the fuel tank 20 into the canister 24. Therefore, referring to FIG. 2A , evaporated fuel is supplied from the fuel tank 20 to the canister 24 via the evaporated fuel path 191, the fluid adjustment unit 12, and the evaporated fuel path 192.

[0057] When the engine 26 is operating for combustion, the purge valve 25 is opened. Therefore, referring to Fig. 2A, the fuel components in the canister 24 are supplied to the engine 26 via the evaporated fuel path 194, the purge valve 25, and the evaporated fuel path 195. The supplied fuel components are used for the combustion operation of the engine 26 together with the fuel injected into the cylinders of the engine 26.

[0058] Here, the pressure regulating device 10 shown in Fig. 1 is interposed in the evaporated fuel path 191 shown in Fig. 2A. That is, at least a part of the evaporated fuel path 191 shown in Fig. 2A is made up of the fluid circulation portion 11 shown in Fig. 1. Furthermore, the wall portion 131 to the wall portion 133 shown in Fig. 1 are formed inside the middle part of the evaporated fuel path 191 shown in Fig. 2A.

[0059] Therefore, even if the aforementioned extract 15 is generated inside the evaporated fuel path 191 as the evaporated fuel generated in the fuel tank 20 passes through the evaporated fuel path 191, the extract 15 can be captured by the wall portion 131 or the wall portion 133 and prevented from entering the fluid adjustment portion 12.

[0060] 2B, this makes it possible to prevent the extract 15 from interfering with the movement of movable parts such as the spring 122 and the valve 124 inside the fluid adjusting unit 12. This prevents the negative pressure flow rate of the fuel tank 20 from falling below a specified level, and also prevents the negative pressure of the fuel tank 20 from falling below a specified level and erroneously turning on the warning light.

[0061] 3 is a perspective view showing a pressure regulating device 10 according to another embodiment. The fluid circulation section 11 has a curved section 14. The curved section 14 is a section where a middle portion of the fluid circulation section 11 is folded back by approximately 180 degrees. Two curved sections 14 are formed in the fluid circulation section 11.

[0062] Wall portions 13 are provided in the curved portion 14. Here, three wall portions 13 are formed in one curved portion 14. In this way, the curved portion 14 of the fluid circulation portion 11 can be reinforced by the wall portions 13.

[0063] Although the embodiments of the present invention have been described above, the present invention is not limited to these and can be modified within the scope of the present invention. In addition, the above-described embodiments can be combined with each other.

[0064] In the above-described embodiment, the pressure regulator 10 constitutes part of the tank pressure regulator 18, but the pressure regulator 10 can be incorporated into other mechanisms. For example, in an automobile braking mechanism, the pressure regulator 10 can be applied to a pipe through which vaporized brake fluid flows. In this way, it is possible to prevent the extract 15 from interfering with the operation of the braking mechanism. [Explanation of symbols]

[0065] 10 Pressure Regulating Device 11 Fluid flow section 12 Fluid adjustment section 121 Lower housing 122 Spring 123 Valve guide 124 Valve 125 Spring 126 Output shaft 127 Encapsulating material 128 Upper Housing 129 Inner wall 13 Wall 131 Wall 132 Wall 133 Wall 14 Curved section 15 Extract 16 fluid 17 Hole 171 Hole 172 Hole 173 Hole 18 Tank pressure regulator 191 Evaporative fuel path 192 Evaporative fuel path 193 Evaporative fuel path 194 Evaporative fuel path 195 Evaporative fuel path 20 Fuel Tank 21 Fuel Station 22 filters 23 Mechanical relief valve 24 canisters 25 Purge valve 26 Engine

Claims

1. A pressure regulating device that adjusts the pressure of a fluid flowing inside, a fluid flow portion through which the fluid flows; a fluid adjusting section disposed inside the fluid circulation section and adjusting the pressure of the fluid; a wall portion disposed upstream of the fluid adjusting portion in the flow of the fluid and erected in a wall shape from an inner wall of the fluid circulation portion, the fluid passage portion has a curved portion, The pressure adjusting device, wherein the wall portion is disposed at the curved portion.

2. A pressure regulating device that adjusts the pressure of a fluid flowing inside, a fluid flow portion through which the fluid flows; a fluid adjusting section disposed inside the fluid circulation section and adjusting the pressure of the fluid; a wall portion disposed upstream of the fluid adjusting portion in the flow of the fluid and erected in a wall shape from an inner wall of the fluid circulation portion, the fluid passage portion has a substantially circular cross-sectional shape and is made of a synthetic resin; the wall portion has a generally ring-like shape extending from the inner surface of the fluid circulation portion toward the interior thereof, the fluid is a gas; A pressure regulating device, characterized in that an extract extracted from the synthetic resin constituting the fluid circulation portion is captured in the wall portion.

3. the wall portion is formed from an inner wall of the fluid circulation portion toward a center of the fluid circulation portion, 3. The pressure adjusting device according to claim 1, wherein a hole for allowing the fluid to flow toward the fluid adjusting portion is formed in the wall portion.

4. The pressure adjusting device according to claim 3 , wherein the wall portion is formed in a plurality of portions along the direction in which the fluid flows.

5. The pressure adjusting device according to claim 4 , wherein the positions of the holes are different in the plurality of wall portions.

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