JP2009041665A - Evaluation facility valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an evaluation facility valve having improved durability by suppressing the interference of an inclination suppressing member with another member when the misalignment of a piston as an operation part is caused by high pressure and high speed operation. <P>SOLUTION: The valve 1 is used in evaluation facilities for performing evaluation test of a tested object valve. It comprises the inclination suppressing member 9 for suppressing the misalignment of the piston 4 in the valve 1. As the inclined suppressing member 9, a shim can be used which is arranged between the piston 4 and a poppet 5 in linkage with the piston 4. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a valve for evaluation equipment. More specifically, the present invention relates to a valve structure used in an evaluation facility that performs an evaluation test of a valve for a high-pressure tank, for example.

  Conventionally, various techniques have been proposed for the structure of the valve or for the control of the valve (for example, see Patent Document 1 for the structure of the solenoid valve and Patent Document 2 for the control of the valve).

In recent years, in a fuel cell vehicle in which such a valve is used, for example, in a hydrogen tank, attempts have been made to increase the pressure of the hydrogen tank as one of means for further extending the cruising distance. In addition, with such a high pressure of the hydrogen tank, a durability test is performed in which a high pressure (for example, 70 MPa) is intermittently applied when evaluating the valve of the hydrogen tank.
Japanese Patent Laid-Open No. 9-273653 JP 2006-302666 A

  However, there has been a situation in which the valve for the test equipment frequently fails before the valve to be tested.

  Then, an object of this invention is to provide the valve for evaluation facilities which improved durability.

  In order to solve this problem, the present inventor has made various studies. For example, in the high-speed response valve used in the equipment as described above, when there is a backlash in the fixing member of the poppet connected to the piston that moves up and down by air pressure and spring force, the piston swings its neck and around it. In some cases, it may interfere with the wound spring, so that metal powder is generated and adheres to an O-ring in the vicinity to cause deterioration of the airtight performance of the valve function. The present inventor who paid attention to such a point has further studied and has come to know the technology that leads to the solution of the problem.

  The present invention is based on such knowledge, and is a valve used in an evaluation facility for performing an evaluation test of a valve to be tested, and is provided with an inclination suppressing member that suppresses a misalignment of a piston in the valve. It is said. In this evaluation equipment valve, the tilt suppression member suppresses the piston, which is the operating portion, from being displaced due to high pressure and high speed operation and causing interference with other members. According to this, it is possible to suppress the failure of the valve for evaluation equipment caused by the misalignment.

  For example, a shim disposed between a piston and a poppet interlocking with the piston can be used as the inclination suppressing member of the evaluation facility valve. Such a shim eliminates rattling between the piston and the poppet (or a member for fixing the poppet), and realizes a smooth operation during high-pressure and high-speed operation. It is also preferable that the shim is formed with a protrusion that further suppresses the inclination of the piston.

  Such a valve for evaluation equipment is suitable for use in evaluation equipment in which, for example, a valve of a high-pressure hydrogen tank in a fuel cell system is subjected to an evaluation test.

  ADVANTAGE OF THE INVENTION According to this invention, durability of the valve | bulb for evaluation facilities can be improved.

  Hereinafter, the configuration of the present invention will be described in detail based on an example of an embodiment shown in the drawings.

  1 to 3 show an embodiment of a valve for evaluation equipment according to the present invention. The evaluation facility valve 1 according to the present invention is used, for example, as a fast response valve in a durability test facility for a high pressure tank valve.

  Here, the internal structure of the valve 1 for evaluation equipment is demonstrated (refer FIG. 1). As shown in FIG. 1, the evaluation facility valve 1 includes a solenoid valve 2, a conducting pipe 3, a piston 4, a poppet 5, a spring 6, a high-pressure gas inlet 7, a (high-pressure) gas outlet 8, and the like. Yes. In the present embodiment, a shim (inclination suppressing member) 9 for suppressing misalignment of the piston 4 is provided inside the evaluation facility valve 1.

  The piston 4 is a member that receives a pressure of a gas (for example, air) fed into the valve through the conducting tube 3 and moves in the axial direction. For example, the piston 4 of the present embodiment is provided so as to slide in the axial direction along the inner wall of the casing 10. An O-ring 12 is interposed between the peripheral edge of the piston 4 and the inner wall of the casing 10. In addition, a circular recess 4a is provided at the center of the piston 4 (see FIG. 1). Further, the piston 4 is urged in the axial direction by a spring 6 (for example, in the case of this embodiment, the side from which air is sent from the conducting tube 3 as shown in FIG. 1).

  The poppet 5 is a member that moves in the axial direction in conjunction with the piston 4. For example, the poppet 5 of the present embodiment interrupts the flow of the gas flowing from the high-pressure gas inlet 7 to the gas outlet 8 to stop the flow of the gas, or opens the gas path to allow the flow. The poppet 5 and the piston 4 are fixed by a fixing member 5a with a header inserted from the concave portion 4a side (see FIG. 1).

  The shim 9 is a member arranged between the above-described piston 4 and the poppet 5 interlocked with the piston 4, for example. The shim 9 functions to prevent the piston 4 from shaking the neck when stroking in the axial direction and to interfere with the spring 6. For example, the shim 9 of the present embodiment is interposed between the above-described fixing member 5a and the piston 4 and acts to reduce these gaps.

  Although the specific shape of such a shim 9 is not specifically limited, In this embodiment, the cylindrical shim 9 which has protrusion parts like the flange 9b is employ | adopted (refer FIG. 2, FIG. 3). In such a shim 9, a cylindrical portion (main body) 9a is interposed between the piston 4 and the fixing member 5a to reduce the gap, and a flange 9b is provided below the header of the fixing member 5a. By interposing, the gap between the header and the piston 4 is also reduced (see FIG. 1). According to such a shim 9, it is possible to further suppress the inclination of the piston 4 by swinging the neck during the stroke, thereby suppressing the inclination, and effectively suppressing the misalignment (displacement from the center) of the piston 4.

  Here, it will be as follows if other members are also explained, describing operation of valve 1 for evaluation equipment in this embodiment. First, air in a state of being supplied from the outside through the air pipe 11 is guided to a space (chamber) in the evaluation equipment valve 1 by opening the electromagnetic valve 2 (see FIG. 1). Thus, the air supplied to the evaluation equipment valve 1 flows through the conducting pipe 3 and enters the valve, and acts to push down the piston 4.

  When the piston 4 is pushed down by the action of air, the poppet 5 is also pushed down in conjunction with the piston 4. The pushed poppet 5 closes the valve 13 and interrupts the path of the high-pressure gas flowing from the high-pressure gas inlet 7 to the gas outlet 8.

  On the other hand, when the solenoid valve 2 is closed and the air in the space (chamber) in the evaluation equipment valve 1 is released to the outside, the pushed-down piston 4 and poppet 5 are pushed up by the urging force of the spring 6 to return to the original position. Return to. Along with this, the valve 13 in which the poppet 5 was closed is opened, and the high pressure gas flows from the high pressure gas inlet 7 to the gas outlet 8.

  When the piston 4 and the poppet 5 perform the stroke operation in this way, as described above, the shim 9 reduces rattling of the piston 4 and suppresses the swinging operation. Thereby, it is possible to suppress the piston 4 from interfering with the spring 6 disposed around the piston 4. When the piston 4 interferes with the spring 6, the metal powder generated thereby adheres to the nearby O-ring, and the valve function may be deteriorated as a result of deteriorating the airtight performance. In the evaluation equipment valve 1, the shim 9 that functions as an inclination suppressing member suppresses the generation of such metal powder, and also suppresses the occurrence of misalignment during high-pressure and high-speed operation. As a result, the durability of the evaluation equipment valve 1 itself is improved. It is also advantageous in terms of improving durability that the shim 9 can realize a smoother stroke operation of the piston 4 and the like.

  The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the scope of the present invention. For example, the evaluation facility valve 1 in the above-described embodiment is particularly suitable when the valve of the high-pressure hydrogen tank in the fuel cell system is the subject of the evaluation test, but is not limited thereto, and other various valves can be used. It can also be applied to.

It is a figure which shows the structure of the valve for evaluation facilities which shows one Embodiment of this invention. It is a perspective view which shows an example of an inclination suppression member. It is a side view of an inclination suppression member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Valve for evaluation equipment, 4 ... Piston, 5 ... Poppet, 9 ... Shim (tilt suppression member), 9b ... Flange (protrusion)

Claims (4)

A valve for evaluation equipment, which is a valve used in evaluation equipment for performing an evaluation test of a valve to be tested, and is provided with an inclination suppressing member that suppresses misalignment of a piston in the valve.   The evaluation equipment valve according to claim 1, wherein a shim disposed between the piston and a poppet interlocking with the piston is used as the inclination suppressing member.   The evaluation equipment valve according to claim 2, wherein the shim is formed with a protrusion that further suppresses the inclination of the piston.   The evaluation facility valve according to any one of claims 1 to 3, wherein the evaluation facility uses a valve of a high-pressure hydrogen tank in the fuel cell system as an object of an evaluation test.

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