JP6622869B1 - Inspection jig for fuel piping valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inspection jig which can improve the accuracy of a performance test of a fuel pipe valve, does not include an electrical configuration, is easy to maintain, and can be manufactured at low cost. SOLUTION: A cylindrical flange portion 2 which opens up and down, a sensor portion 3 horizontally inserted from an outer wall side to an inner wall side of the flange portion, and a sensor portion 3 provided on an outer wall side of the sensor portion are provided. The display unit 4 is provided, and the sensor unit includes a pipe 31, a shaft 32 provided in the pipe, a magnetic body 33 movable in the pipe, and an elastic body that regulates movement of the magnetic body and the shaft. It has a control member 37, a tracing stylus 34 that can move up and down and can convert the up and down movement into horizontal movement of the shaft, and a tracing stylus bracket 36 that supports the tracing stylus, and the display unit is provided on the pipe surface. An inspection jig for a valve for a fuel pipe, comprising: a display band 41; and a movable member 42 movable on the surface of the display band following movement of a magnetic material. [Selection diagram] Fig. 1

Description

  The present invention relates to an inspection jig for a fuel pipe valve used in the petroleum industry, and more particularly to an inspection jig for a fuel pipe valve used in an aircraft fuel supply facility.

  2. Description of the Related Art A fueling system called a hydrant system is known in an aircraft fueling facility. The hydrant system is a fueling system that delivers aviation fuel to an apron (parking station) through an apron pipe buried underground through a header pit equipped with an oil storage tank, a hydrant pump, a shutoff valve, and the like.

  In this hydrant type fueling system, a fuel pipe valve called a hydrant valve is connected to the end of a rising pipe that extends in a vertical direction with respect to a horizontally disposed apron pipe. By opening, it is possible to supply a necessary amount of fuel to an aircraft or the like when necessary.

  The hydrant valve serves to connect the fuel pipe and the coupler of the refueling vehicle, and when the abnormality in the fuel supply in the pipe or the abnormality occurs in the hydrant valve itself, the hydrant valve quickly closes the fuel. In order to ensure the performance, inspections and tests are regularly performed.

Conventionally, a performance test of a hydrant valve is performed, for example, according to the following steps.
・ Install the hydrant valve removed from the hydrant system to the test pipe in the test bench and connect the test coupler.
・ Connect the deadman handle to the hydrant valve.
・ Supply fuel at the specified maximum flow rate (1000GPM) with Deadman Control ON.
The time from when the deadman control is turned off until the hydrant valve is closed (hereinafter also referred to as the hydrant valve closing time), that is, the time until the fuel flow stops is measured using a stopwatch or the like.

  Here, in the measurement of the closing time of the hydrant valve, the judgment when the fuel flow is stopped is usually confirmed by the “sound” that is generated in contact with the valve body when the main piston in the hydrant valve is closed. ing. On the other hand, since the test bench for conducting the test is installed at one corner of the aircraft refueling facility site, the tester can distinguish between the surrounding sound and the target closing sound while taking into account the noise associated with aircraft takeoff and landing. Ability is required. However, even a skilled tester has individual differences in hearing, so the test results may vary, and there is a concern about a decrease in reliability.

  As a measure for solving such a situation, an inspection jig capable of visually confirming the closure of the main piston in the hydrant valve has been proposed (see Patent Document 1). This inspection jig is used by installing it between the pipe and the hydrant valve. The light emitting part provided in the sensor part is brought into contact with the main piston that descends vertically when the hydrant valve is closed. Is emitted so that the lowering operation of the main piston can be visually observed. In other words, in addition to the confirmation by listening to the closing sound of the conventional main piston, this inspection jig does not require skilled skills and reduces the effects of ambient noise, etc. by using confirmation by visual information using light. However, it is excellent in that the accuracy of the performance test of the hydrant valve can be improved.

Japanese Patent No. 5887436

  On the other hand, the installation environment of the valve for fuel piping, that is, the environment of the test bench for carrying out the inspection is usually within the danger area defined by the Industrial Safety Research Institute technical guidelines “Factory Electric Equipment Explosion Protection Guidelines” and JIS C 60079-10. Become. The equipment used in the tests conducted in this environment must be used under the measures stipulated in Article 261 of the Industrial Safety and Health Regulations, It is said that the condition must be satisfied.

  Here, in the proposal of Patent Document 1, as described above, in order to visually recognize the closure of the main piston by light, an electric circuit is provided in the sensor unit to electrically light the light emitting unit. Therefore, when using the inspection jig including the electric circuit of Patent Document 1 in the installation environment of the valve for fuel piping, it is necessary to satisfy the conditions stipulated in the above occupational safety and health regulations. Complicated procedures were necessary.

  Moreover, since the structure of the inspection jig of Patent Document 1 includes an electric circuit, the number of parts is complicated, maintenance work for the inspection jig becomes complicated, and there is room for improvement in terms of high manufacturing costs. was there.

  The present invention has been made in view of the circumstances as described above, and can improve the accuracy of the performance test of the valve for fuel piping, does not include an electrical configuration, is easy to maintain, and has a low level. The object is to provide an inspection jig that can be manufactured at low cost.

The present invention has been made to solve the above technical problem, and has the following features.
First, a fuel piping valve inspection jig in which a main piston rises vertically upward by a supply pressure of a fluid supplied from an inlet port when opened, and the main piston drops vertically downward when closed,
A cylindrical flange portion that opens up and down, a sensor portion that is horizontally inserted from the outer wall side to the inner wall side of the flange portion, and a display portion that is provided on the outer wall side of the sensor portion,
The sensor part includes a pipe horizontally inserted through the flange part, a shaft provided in the pipe, a magnetic body connected to the outer wall side end of the shaft and movable in the pipe, A movement control member provided at an end of the pipe and made of an elastic body that restricts movement of the magnetic body and the shaft;
A measuring element which is provided on the inner wall side of the flange portion and can move up and down, and a contact portion with the shaft is formed on an inclined surface, and can convert vertical movement into horizontal movement of the shaft, and an inner wall side end portion of the pipe And a probe bracket for supporting the probe,
The display unit includes a display band provided on a pipe surface in a moving range of the magnetic body, and a movable member that can move following the movement of the magnetic body on the surface of the display band,
Due to the downward movement of the probe associated with the lowering of the main piston when the fuel piping valve is closed, the shaft is pushed along the inclined surface of the probe to move in the horizontal direction and is connected to the shaft. The magnetic body moves horizontally, and the movable member moves on the display band following the movement of the magnetic body to display the open / close state of the fuel pipe valve.
Second, Oite the inspection jig of the fuel pipe valve of the first invention, the feeler bracket is detachably connected to, it is preferable that the replaceable measuring element.

  According to the fuel pipe valve of the present invention, it is possible to improve the accuracy of the performance test of the hydrant valve without requiring skill, and because it does not have an electrical configuration, it is excellent in safety and easy to maintain. In addition, the manufacturing cost can be kept low.

It is a schematic perspective view which shows one Embodiment of the test | inspection jig | tool of the valve for fuel piping of this invention. (A) is a schematic top view which shows roughly one Embodiment of the inspection jig of the valve for fuel piping of this invention, (b) is a schematic front view in (a), (c) is It is AA sectional drawing in (a). It is a schematic sectional drawing which shows the structure of the sensor part of the inspection jig of the valve for fuel piping of this invention, and a display part. It is a schematic sectional drawing which shows the state which attached the inspection jig of the valve for fuel piping of this invention to the hydrant valve, (a) shows the open state of a hydrant valve, (b) shows the closed state of a hydrant valve. Show. It is a schematic sectional drawing which shows the relationship between the movement of the magnetic body in a sensor part, and operation | movement of a display part in one Embodiment of the inspection jig of the valve for fuel piping of this invention, (a) is an open state of a valve. (B) shows the closed state of the valve. It is the photograph which shows one Embodiment of a display part, (a) has shown the open state of the valve | bulb, (b) has shown the closed state of the valve | bulb.

  Hereinafter, embodiments of an inspection jig for a fuel pipe valve of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic perspective view showing one embodiment of an inspection jig (hereinafter simply referred to as an inspection jig) for a fuel pipe valve of the present invention. FIG. 2 (a) is an inspection jig of the present invention. FIG. 2 (b) is a schematic front view in FIG. 2 (a), and FIG. 2 (c) is an AA sectional view in FIG. 2 (a). is there. FIG. 3 is a schematic cross-sectional view showing the structure of the sensor portion of the inspection jig of the present invention.

  The inspection jig 1 according to this embodiment includes a flange portion 2, a sensor portion 3, and a display portion 4.

  The flange portion 2 has a cylindrical shape that opens up and down, and is a member that serves as a base that is sandwiched between an end portion of a vertically rising pipe and a fuel pipe valve to be inspected. The inside of the shape becomes a passage for fuel. Moreover, the side surface of the flange part 2 is provided with an insertion hole 21 that horizontally penetrates the outer wall side and the inner wall side for attaching a sensor part 3 to be described later.

  The shape of the flange portion 2 can be appropriately designed according to the end of the vertically rising pipe and the standard of the fuel pipe valve to be inspected. For example, as a flange for the petroleum industry compliant with the JPI standard, The shape can be adapted to the # 150 flange shape. Moreover, it can also be set as the shape which cut part of the gasket surface from the shape based on a JPI specification as needed.

  The sensor unit 3 is a member that detects the lowering of the main piston when the fuel piping valve is closed. The sensor unit 3 is horizontally inserted into and fixed to the insertion hole 21 provided in the flange unit 2. The sensor unit 3 is provided at a pipe 31, a shaft 32 inserted into the pipe 31, a magnetic body 33 connected to an outer wall side end of the shaft 32, and an end of the magnetic body 33. A movement control member 37 made of an elastic body that restricts the movement of the shaft 32 is provided.

  The pipe 31 is inserted into the insertion hole 21 of the flange portion 2 and fixed in close contact with the horizontal. In the embodiment shown in FIG. 3, the pipe 31 and the flange are formed by screwing the joining member 23 to the outer wall side of the flange portion 2 in a state where the O-ring 24 is provided on the inner wall of the insertion hole 21 and the pipe 31 is inserted into the insertion hole 21. The part 2 is fixed tightly.

  Further, the shaft 32 and the magnetic body 33 slidably inserted into the pipe 31 are further connected to the flange portion 2 by the movement control member 37 provided at the end of the magnetic body 33. It is designed to be pushed toward the inner wall. The end of the flange portion 2 on the outer wall side of the pipe 31 is sealed with a sealing member 38.

  The magnetic body 33 has a function of operating or stopping by moving a movable member 42 of the display unit 4 to be described later by movement thereof. The magnetic body 33 is not particularly limited as long as it can apply a magnetic field to the movable member 42 of the display unit 4. For example, a ferromagnetic body 33 such as a neodymium magnet is preferably used. Can do.

  The movement control member 37 has a function of controlling the sliding movement of the magnetic body 33 and the shaft 32. The movement control member 37 places the magnetic body 33 within the operating range of the movable member 42 of the display unit 4, and the magnetic body 33 and the shaft. This is a member having a function of pressing 32 to the measuring element 34 and is made of an elastic body. The elastic body is not particularly limited as long as it can provide the above functions. For example, a spring member, a rubber member, a small gas damper, or the like can be used, and among these, particularly shown in FIG. Such a spring member can be suitably used.

  The sealing member 38 is provided to seal the end of the pipe 31 of the sensor unit 3 and prevent the magnetic body 33 and the movement control member 37 from being exposed to the outside from the sensor unit 3. For example, a screw member or the like can be used as the sealing member 38.

  On the other hand, on the inner wall side of the flange portion 2 of the sensor unit 3, a measuring element 34 that comes into contact with the main piston and moves downward as the main piston descends when the fuel piping valve is closed, and the inner wall side of the pipe 31. A probe bracket 36 for supporting the probe 34 connected to the end is provided. Further, the end of the shaft 32 is in contact with the side surface of the probe 34, and the vertical movement of the probe 34 is converted into the horizontal movement of the shaft 32.

  As a specific structure in which the vertical movement of the tracing stylus 34 is converted into the horizontal movement of the shaft 32, for example, as shown in FIGS. 3 and 5, the contact portion of the tracing stylus 34 with the shaft 32 is an inclined surface 35. The formed structure can be exemplified. According to this structure, the end of the shaft 32 is pushed along the inclined surface 35 of the measuring element 34 as the measuring element 34 is lowered, and the shaft 32 can be moved in the horizontal direction.

  The inclined surface 35 provided on the measuring element 34 is an inclined surface 35 that is formed deeper as it goes downward. Normally, as shown in FIG. 5A, the tip end of the shaft 32 is located deeply below the inclined surface 35. It is a state. From this state, as shown in FIG. 5B, when the probe 34 descends and the tip of the shaft 32 moves to a shallow position above the inclined surface 35, the shaft 32 is pushed by the inclined surface 35 and the flange is moved. 2 Slide to the outer wall side. Since the shaft 32 is always pressed in the direction of the probe 34 by the movement control member 37 provided at the end, the tip of the shaft 32 pushes up the probe 34 when the descent of the probe 34 is released. At the same time, it returns to a deep position below the inclined surface 35.

  The angle of the inclined surface 35 provided on the measuring element 34 can be appropriately determined in consideration of the lowering distance of the measuring element 34 and the sliding distance of the shaft 32. For example, the lowering distance of the measuring element 34: the sliding of the shaft 32 When the distance is 1: 1, the angle is set to 45 °.

  On the other hand, a hydrant valve as a fuel piping valve to be measured differs in the descending distance of the main piston 52 depending on the manufacturer. Therefore, in the inspection jig 1 of the present embodiment, the measuring element 34 of the sensor unit 3 can be provided in a replaceable manner so as to correspond to various hydrant valves. Specifically, as shown in FIG. 3, the probe bracket 36 provided at the tip of the shaft 32 is configured to be detachable by a screw 39 or the like, whereby the probe 34 supported by the probe bracket 36. Can be easily replaced.

  The display unit 4 is a member that visually displays the operation of the probe 34 that detects the lowering of the main piston 52 in the sensor unit 3, and is provided on the outer wall side of the flange unit 2. The display band 41 is provided, and a movable member 42 is provided on the surface of the display band 41 so as to be movable.

  The display band 41 is provided in the slide width of the shaft 32 that slides as the measuring element 34 descends, that is, in the movement range of the magnetic body 33 connected to the shaft 32. In the embodiment shown in FIGS. 5 and 6, a display band 41a indicating the raised position of the probe 34, that is, a valve open state, and a display band 41b indicating the lowered position of the probe 34, that is, a valve closed state are provided. It is provided with different colors.

  Further, a movable member 42 is slidably provided on the surface of the display unit 4, and the movable member 42 slides on the display band 41 following the horizontal movement of the magnetic body 33 in the pipe 31. ing. That is, the display unit 4 is made of a material that does not react with the magnetic body 33, and the movable member 42 is made of a material that reacts with the magnetic body 33. As a specific configuration, the display unit 4 can be exemplified by a configuration in which a tubular plastic or film is provided on the surface of the pipe 31 or a configuration in which the surface of the pipe 31 is painted. The movable member 42 that follows the magnetic body 33 can be exemplified by a configuration in which a tubular member made of a material such as iron or magnet is covered on the display unit 4. Further, the width of the movable member 42 is a width that hides either the display band 41a indicating the open state of the valve or the display band b indicating the closed state of the valve.

  Further, in the display unit 4 of the present embodiment, it is preferable to provide a case 43 for covering the display unit 4 and the movable member 42. Specifically, as shown in FIGS. 1, 2, and 6, a case 43 provided with a window that faces the display band 41 and the movable member 42 can be exemplified. By providing the case 43 in the display unit 4, the visibility of the display unit 4 can be improved and the smooth operation of the movable member 42 can be maintained.

  Next, the operation of the inspection jig 1 of the present invention having the above configuration will be described in detail. The operation description of the inspection jig 1 of the present invention describes an operation test when the inspection treatment of the present invention is used for an operation test of a hydrant valve. FIG. 4 is a schematic cross-sectional view schematically showing an embodiment of a performance test method for a hydrant valve 5 as a fuel pipe valve using the fuel pipe valve inspection jig 1 of the present invention. FIG. 4A shows a state where the hydrant valve 5 is opened, and FIG. 4B shows a state where the hydrant valve 5 is closed.

  FIG. 5 is a schematic cross-sectional view showing the movement of the magnetic body 33 in the sensor unit 3 and the operating state of the movable member 42 in the display unit 4 in one embodiment of the inspection jig 1 for a fuel pipe valve of the present invention. It is. FIG. 5A shows the opened state of the valve, and FIG. 5B shows the closed state of the valve.

  The hydrant valve 5 to which the inspection jig 1 of the present embodiment can be applied has a structure in which fuel (fluid) flows from below to above as shown in FIG. 4, for example. Specifically, the fuel supplied from the inlet port 51 is discharged from the outlet port 53. When the hydrant valve 5 is opened, the main piston 52 rises vertically upward by the supply pressure of the fuel supplied from the inlet port 51. . Further, when the hydrant valve 5 is closed, the main piston 52 descends vertically downward. Here, when the hydrant valve 5 is opened, the bottom surface portion 52 a of the main piston 52 is not in contact with the valve body 54. On the other hand, when the hydrant valve 5 is closed, the bottom surface portion 52 a of the main piston 52 is in contact with the valve body 54.

  The inspection jig 1 of this embodiment is attached to the inlet port 51 side of the hydrant valve 5. When the hydrant valve 5 is opened, the bottom surface portion 52a of the main piston 52 and the upper end portion of the probe 34 of the sensor unit 3 of the inspection jig 1 are not in contact with each other. At this time, in the sensor unit 3, the magnetic body 33 is at the position of the display band 41 b by the pressing force of the movement control member 37 and is hidden by the movable member 42 that follows the magnetic body 33. That is, the display unit 4 displays a display band 41a indicating valve opening (FIGS. 5A and 6A).

  On the other hand, when the hydrant valve 5 is closed, the bottom surface portion 52a of the main piston 52 and the upper end portion of the measuring element 34 of the sensor unit 3 of the inspection jig 1 come into contact with each other to push the measuring element 34 downward. At this time, in the sensor unit 3, the shaft 32 slides along the inclined surface 35 provided at the contact point of the probe 34 with the shaft 32 as the probe 34 is lowered. In addition, the magnetic body 33 moves as the shaft 32 slides. The moving position of the magnetic body 33 at this time is at the position of the display band 41 a and is hidden by the movable member 42 that follows the magnetic body 33. That is, the display unit 4 displays a display band 41b indicating valve closing (FIGS. 5B and 6B).

  Further, when the hydrant valve 5 is returned to the opened state from this state, the bottom surface portion 52a of the main piston 52 and the upper end portion of the probe 34 of the sensor unit 3 of the inspection jig 1 are separated. At this time, in the sensor unit 3, the shaft 32 presses the inclined surface 35 of the measuring element 34 by the pressing force of the spring of the movement control member 37 that presses the shaft 32 and the magnetic body 33 in the direction of the measuring element 34. The child 34 is returned upward. Further, the magnetic body 33 returns to the position of the display band 41b and is hidden by the movable member 42, and the display unit 4 displays the display band 41a indicating that the valve is open (FIGS. 5A and 6A). ).

  The measurement of the closing time of the hydrant valve 5 using the inspection jig 1 of the present embodiment having the above-described configuration and operation is performed after the deadman control of the hydrant valve 5 is turned off. By measuring the time when the display band 41a indicating the valve opening is switched to the display band 41b indicating the valve closing, the measurement can be performed easily and reliably. At this time, the measurement system can be further improved by simultaneously confirming the closing sound of the valve, which is a conventional determination means.

  As described above, in the inspection jig 1 according to the present invention, the magnetic body 33 in the sensor unit 3 operates the movable member 42 of the display unit 4 in response to the opening / closing operation of the main piston 52 of the hydrant valve 5. With 41, the open / closed state of the hydrant valve 5 can be visually confirmed. Therefore, for example, in the performance test of the hydrant valve 5, by using the fuel pipe valve inspection jig 1 of the present invention, in addition to the conventional hearing by listening to the closing sound of the main piston 52 in the hydrant valve 5. Visual information can be used in combination, and the skill of the examiner is not required, the influence of ambient noise on the test bench is reduced, and the accuracy of the performance test of the hydrant valve 5 can be improved. Furthermore, since the inspection jig 1 of the present invention has a configuration that does not use electricity at all as described above, it can be safely measured even in a place where combustible fuel is handled. In addition, since the configuration is relatively simple, maintenance is easy and manufacturing costs can be kept low.

DESCRIPTION OF SYMBOLS 1 Inspection jig 2 Flange part 21 Insertion hole 3 Sensor part 31 Pipe 32 Shaft 33 Magnetic body 34 Measuring element 35 Inclined surface 36 Measuring element bracket 37 Movement control member 38 Sealing member 39 Screw 4 Display part 41 Display belt 42 Movable member 43 Case 5 Hydrant valve 51 Inlet port 52 Main piston 52a Bottom face 53 Outlet port 54 Valve body

Claims (2)

A fuel piping valve inspection jig in which the main piston rises vertically upward by the supply pressure of the fluid supplied from the inlet port when opened, and the main piston drops vertically downward when closed,
A cylindrical flange opening up and down;
A sensor part horizontally inserted from the outer wall side to the inner wall side of the flange part; and
A display unit provided on the outer wall side of the sensor unit;
The sensor unit is
A pipe inserted horizontally through the flange,
A shaft built in the pipe;
A magnetic body connected to the outer wall side end of the shaft and movable in the pipe;
A movement control member provided at an end of the pipe and made of an elastic body that restricts movement of the magnetic body and the shaft;
A measuring element that is provided on the inner wall side of the flange portion, is movable up and down, and a contact portion with the shaft is formed on an inclined surface, and the vertical movement can be converted into horizontal movement of the shaft;
A probe bracket connected to the inner wall side end of the pipe and supporting the probe;
The display unit
In the moving range of the magnetic body, a display band provided on the pipe surface,
A movable member that can move following the movement of the magnetic body on the surface of the display band;
Due to the downward movement of the probe associated with the lowering of the main piston when the fuel piping valve is closed, the shaft is pushed along the inclined surface of the probe to move in the horizontal direction and is connected to the shaft. The fuel pipe valve, wherein the magnetic body moves horizontally and the movable member moves on the display band following the movement of the magnetic body to display an open / closed state of the fuel pipe valve. Inspection jig. 2. The inspection jig for a valve for a fuel pipe according to claim 1, wherein the probe bracket is detachably connected so that the probe can be exchanged .