JP2016156442A - Needle valve for high pressure, and hydrogen station employing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a needle valve for high pressure by which an ultra-high-pressure fluid is opened/closed or a flow rate is adjusted surely and highly accurately, in which a failure caused by manipulation is completely eliminated, further, of which the manipulator is easily visible from the outside and which is appropriate for a high-pressure fluid.SOLUTION: The needle valve for high pressure is provided so as to open/close the high-pressure fluid or to adjust the flow rate by vertically moving a needle part without rotation in a valve seat port within a body including an inflow port and an outflow port. A vertically movable member is provided so as to be threaded within a cap that is threaded to the body in a longitudinal axis direction, and a handle is fixed to an upper part of the vertically movable member. The vertically movable member is configured by providing a needle pole that extends integrally with the needle part, within a sleeve including a male screw part in an outer circumference so as to be vertically moved with the vertical movements of the sleeve without rotation. A flange part that is provided in a lower end of the sleeve is engaged with a lock part that is provided at a lift stop position within the cap.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a high pressure needle valve, for example, a needle non-rotating manual high pressure needle valve suitable for an ultrahigh pressure hydrogen fluid for a hydrogen station and a hydrogen station using the same.

  Normally, a non-rotating needle valve does not rotate the needle that accompanies the opening and closing operation of the valve, so that it does not cause galling to the valve seat when the valve is closed, and can suppress wear and damage to the valve seat. -It is excellent in durability, and since the friction between the needle and the gland packing is small compared to the rotary type, the valve opening / closing torque is also small, so it is frequently used for fluid adjustment.

  On the other hand, in recent years, with the review of energy policy, the spread of the supply infrastructure for hydrogen stations for fuel cell vehicles has been strongly promoted. In piping equipment, such as a hydrogen station, in which high-pressure fluid flows, for example, in the case of ultra-high pressure hydrogen, a high-pressure fluid valve is indispensable because the pressure is 80 Mpa or higher.

As a normal needle valve, Patent Literature 1 and Patent Literature 2 have been proposed. In Patent Document 1, a spherical surface is formed at the upper end of the valve needle, and this spherical surface is disposed in a cylindrical hole formed at the forked end of the lower end of the actuating rod. The spherical surface has a sliding fit, and the external thread formed on the side of the actuating rod is screwed with the internal thread formed on the inner peripheral surface of the liner sleeve arranged inside the packing nut to rotate the valve handle The operating rod is a needle valve that is raised or lowered with respect to the liner sleeve through this screwing.
A tapered shoulder is formed at the inner end of the actuating rod, and a shoulder is also formed inside the liner sleeve so as to face the shoulder. When the valve is fully opened, the shoulder of the actuating rod retracted from the packing nut is the liner sleeve. It comes to stop by hitting the shoulder.

  In Patent Document 2, an upper end portion of a valve stem inserted into a sleeve is fixed with a nut via a slide plate, and a fitting ring and a slide ring are provided between an inner peripheral step portion of the sleeve and a step portion provided in the middle of the valve stem. Is interposed, and the upper surface of the valve body is brought into pressure contact with the lower surface of the axially mounted back seat, and is stopped at the raised position.

  Furthermore, Patent Document 3 has been proposed as a prior art related to opening degree display. The same document 3 shows an example of an opening indicator which is attached to the stem itself and protrudes to the outside.

  On the other hand, FIG. 9 shows an example of a comparison of needle valves. A sleeve 3 is provided on a cap 2 screwed to the body 1 so as to be movable up and down. In the sleeve 3, the needle 4 is moved up and down without rotation. The upper end portion of the sleeve 3 is fixed to the handle 4 with a set screw, and the needle 4 is stopped at the raised position when the needle 4 is fully opened. The protrusion 6 and the upper surface of the disk 7 interposed at the lower end of the sleeve 3 are engaged to stop.

Japanese Utility Model Publication No. 50-35370 Japanese Utility Model Publication No. 60-58968 JP 2014-109340 A

However, in the needle valve shown in Patent Document 1, since the operating rod and the valve needle are separate, the needle lift accuracy is impaired, and it cannot be said that the operation of the handle and the operation of the needle are reliably and accurately linked. . Further, since the valve needle moves up and down along with the operating rod, the contact resistance between the both is large, and damage due to galling or wear and a decrease in service life are inevitable, and the slidability, operability and maintenance are poor. In addition, since the interlocking force between the operating rod and the valve needle is poor, the pressing force on the valve seat is easily lost, so the fluid sealing performance is not high, and the contact resistance is high, so the non-rotation of the valve needle is maintained. It is hard to be done. Therefore, it can be said that it is unsuitable to apply to a needle valve for controlling an ultrahigh pressure fluid such as ultrahigh pressure hydrogen in a hydrogen station.
In addition, when fully opened, the tapered shoulder of the actuating rod engages with the tapered shoulder of the liner sleeve to stop the valve needle from rising. There is a risk that the handle may be damaged and the operability of the handle is poor.

  Patent Document 2 is not only suitable for an ultra-high-pressure needle valve because it is in sliding contact with an outer peripheral surface in the middle of a valve stem through a fitting ring and a sliding ring, and is not suitable for an ultra-high pressure needle valve. Since the valve body itself is in contact with the back seat of the material, the internal structure of the needle valve may be damaged due to inadvertent rotation of the handle, and therefore cannot be used for a high-pressure fluid such as a hydrogen station.

  Patent Document 3 is an opening indicator that can be retrofitted, but it is attached to the valve stem itself, and it is a complicated indicator that protrudes to the outside. Not suitable for valves.

  In the needle valve shown in FIG. 9, when the handle 8 is moved in the opening direction, it will eventually be in the fully opened position, and the disc 7 and the cap 2 come into contact with each other to restrict the rotation of the handle 8 in the further opening direction. However, even if the handle 8 is in the fully open position, the handle 8 operates slightly when it is rotated with a stronger force. Therefore, the operator does not notice the fully open position and rotates the handle 8 with a stronger force. Since the disk 7 is a component that does not have so much strength, it deforms without being able to withstand the pressure contact with the cap 2, the sleeve 3 rotates in the opening direction beyond the fully open position, and the needle valve itself breaks down. There was a problem. In addition, since the fully open position cannot be visually recognized from the outside, the operator cannot recognize the fully open position, and even if there is a feel that the operation is restricted due to the structure being fully open, further opening direction without knowing the fully open position There is a risk of turning the handle 8 to cause the failure of the valve as described above.

  Therefore, the present invention has been developed to solve the above-described problems, and the object of the present invention is that the opening and closing of the ultrahigh pressure fluid or the flow rate adjustment is performed reliably and accurately, and there is no failure due to the operation. In addition, the operation tool is to provide a high-pressure needle valve suitable for high-pressure fluid, which can be easily visually recognized from the outside.

  To achieve the above object, the invention according to claim 1 is provided such that a high pressure fluid can be opened and closed or the flow rate can be adjusted by moving the needle portion up and down non-rotatingly at a valve seat in a body having an inlet and an outlet. In the high-pressure needle valve, an elevating member can be screwed inside the cap screwed to the body, and a handle is fixed to the upper part of the elevating member, and the elevating member is A needle rod extending integrally with the needle portion is configured to be non-rotatable in a sleeve having a screw portion on the outer periphery and capable of moving up and down as the sleeve moves up and down. The high pressure needle valve is characterized in that a collar portion provided in the cap is engaged with a locking portion provided at a lift stop position in the cap.

  The invention according to claim 2 is a high-pressure needle valve in which a sliding washer is provided between the lower surface of the flange portion and the upper surface of the annular protrusion provided in the middle of the needle rod.

  The invention according to claim 3 is a high pressure needle valve in which the upper part of the sleeve is fixed to the handle with a set screw, and a sliding washer provided on the upper end surface of the sleeve is fixed with a nut screwed to the upper end of the needle rod. .

  According to a fourth aspect of the present invention, a display cylinder having a sleeve penetrated is fixed to an upper portion of a cap, and a display scale is provided on a display surface formed by cutting out a part of the display cylinder. This is a high pressure needle valve in which the lift position of the lift member can be visually recognized by corresponding to the provided display section.

  In the invention according to claim 5, the display cylinder is formed by notching at least one surface of the upper portion of the display cylinder in a stepped shape to form a display surface, and exposing the display portion of the sleeve to the display surface. This is a high pressure needle valve in which a through window is formed.

  A sixth aspect of the present invention is a hydrogen station characterized in that the high pressure needle valve according to any one of the first to fifth aspects is used in a high pressure hydrogen supply line.

  According to the first aspect of the present invention, for example, not only can the opening / closing or flow rate adjustment be performed smoothly and with high precision on an ultrahigh pressure fluid of about 99 MPa, but also a failure caused by opening / closing of the handle by the operator can be ensured. Therefore, it is possible to provide a high-pressure needle valve that is durable and highly useful.

  According to the second aspect of the present invention, since the slip washer is interposed between the lower surface of the collar portion and the annular projection provided on the needle rod, the sleeve rotates with the sliding resistance being significantly reduced. Since the needle moves up and down with an appropriate stroke with high accuracy in a non-rotating state, it is extremely suitable for an ultra-high pressure needle valve.

  According to the third aspect of the present invention, the handle is fixed to the sleeve, and the upper end of the needle rod is fixed to the upper end surface of the sleeve via the sliding washer. Since it rotates, the needle moves up and down with high accuracy in a non-rotating state in combination with the sliding washer at the lower portion, so that it is possible to provide a needle valve suitable for an ultrahigh pressure fluid of about 99 MPa, for example.

  According to the invention described in claim 4, since the display cylinder can be integrally fixed to the upper part of the cap, the display cylinder is not exposed to the outside at all as compared with the conventional example. In addition to being good, the operator can easily see from the outside.

  According to the fifth aspect of the present invention, since the display surface in which the display cylinder is cut out and the through window for exposing the display portion of the sleeve are formed on the display surface, the display cylinder is formed of the needle valve. It is integrated with the cap in appearance, and a display part can be provided on an appropriate notch surface of the display cylinder, so that the display mechanism is not exposed to the outside and the display mechanism of the high pressure needle valve As its use value is extremely high.

  According to the invention which concerns on Claim 6, it became possible to control the appropriate supply line of a hydrogen station with high precision by providing the said high pressure needle valve in the supply line of high pressure hydrogen.

It is the front longitudinal cross-sectional view which showed the full open state of an example of the needle valve of this invention. It is the front longitudinal section showing the fully closed state of an example of the needle valve of the present invention. It is the longitudinal cross-sectional view which showed an example of the raising / lowering member of the needle valve of this invention. It is a front view of an example of the needle valve of the present invention. It is a side view of an example of the needle valve of the present invention. It is a perspective view of an example of the needle valve of the present invention. It is a front view of an example of the display cylinder of the present invention. It is the block diagram which showed the hydrogen station. It is the longitudinal cross-sectional view which showed the comparative example of the needle valve.

  Hereinafter, embodiments of a high-pressure needle valve according to the present invention will be described in detail with reference to the drawings. The high-pressure needle valve of the present invention is particularly suitable for opening / closing or flow control of ultra-high pressure hydrogen in a hydrogen station. FIG. 1 is a front longitudinal sectional view showing a fully opened state of the needle valve of the present embodiment, and FIG. 2 is a front longitudinal sectional view showing a fully closed state of the needle valve of the present embodiment.

  As shown in FIGS. 1 and 2, the body 10 is formed in a rectangular parallelepiped shape and is thicker than the flow path diameter as a valve body for an ultrahigh pressure fluid. The inflow port 11 and the outflow port 12 are drilled in the horizontal direction from both side surfaces of the body 10, and a shaft mounting portion is drilled in the vertical direction of the body 10. The inflow port 11 and the outflow port 12 are expanded in diameter so that they are opened in the threaded portions, and joints can be connected to these female threaded portions as joints for ultra high pressure as in the body 10. 4 and 6 show a joint 110 connected to the inlet 11 and a joint 120 connected to the outlet 12. The connection of the joint is preferably a cone-and-thread connection because the reliability is high even at an ultrahigh pressure, and the initial performance is maintained even after repeated mounting and removal. The inflow port 11 and the outflow port 12 are formed so that the flow path axes are shifted from each other, and communicate with each other in the body 10 through the valve seat port 13.

  The valve seat port 13 is a seal portion that performs a metal touch seal with the needle portion 25a of the needle 25 that is a valve body, and is formed in a tapered shape that is substantially the same shape as the tapered shape of the needle portion 25a. The valve seat 13 and the needle portion 25a come into contact with each other to close the fluid or adjust the flow rate.

  The shaft mounting portion has a female screw portion 14 formed on the inner periphery of a large-diameter cylindrical space and is open to the outer peripheral surface of the body 10 so that the cap 15 can be screwed thereon. A small-diameter cylindrical space is formed on the back side of the large-diameter cylindrical space, and a through-hole of the needle 25 is formed at the bottom thereof, and communicates with the valve chamber. A seal member that seals between the needle 25 and the body 10 is appropriately provided in the shaft mounting portion. The needle 25 is held by the seal member so that the needle 25 can be moved up and down while maintaining the sealing state between the body 10 and the needle 25 and the needle 25 is non-rotatably fitted to the body 10.

  The configuration of the seal member is not particularly limited, and can be appropriately selected depending on the implementation. For example, a plurality of seal members may be stacked, and as an example of using two types of seal members (gland packings 43 and 44), one gland packing sandwiched between two gland packings 43 from the top and bottom 44. In this case, the ground packings 43 and 44 are stacked on the lower ground ring 41 placed on the bottom surface of the shaft mounting portion, and the ground 42 is stacked thereon.

  On the outer peripheral side of the cap 15, a screw portion 16 is formed on the lower outer periphery, and this male screw portion 16 can be screwed to the female screw portion 14 of the shaft mounting portion. This screwing is performed by screwing the male screw portion 16 to the female screw portion 14 and further tightening a nut 17 screwed in advance to the male screw portion 16. A wrench hook is provided on the upper side of the cap 15 so that the cap 15 can be rotated with a tool. Although not shown in the drawings, a screw may be fixed by providing an anti-rotation member on the screwed cap 15.

  A female thread portion 20 is formed on a part of the inner peripheral surface of the cap 15, and the elevating member 40 can be screwed into the inside of the cap 15 in the longitudinal axis direction. A cylindrical portion 18 having a diameter larger than the inner diameter of the female screw portion 20 is formed, and the cylindrical portion 18 opens at the lower end surface of the cap 15.

  A locking portion 19 is formed in a tapered shape between the female screw portion 20 and the cylindrical portion 18 having different inner diameters. The locking portion 19 is provided at the lift stop position of the lifting / lowering member 40, and is a locking portion that engages with the collar portion 30 of the sleeve 28 to stop the lifting / lowering member 40 from rising. There is no limitation and it can form suitably according to implementation.

  The handle 21 is a rectangular parallelepiped bar handle that is easy to rotate with one hand and is suitable as a handle for a shut-off valve. A set screw 22 is screwed into a sleeve 28 from a lateral hole formed at one end of the handle 21. The set screw 22 is locked and fixed to the provided locking portion 23.

  FIG. 3 is a longitudinal sectional view showing an example of the raising / lowering member 40 of the needle valve of the present invention.

  The needle 25 includes a needle portion 25a that slides with the seal member, and a needle rod 25b that extends integrally with the needle portion 25a. The needle 25 is integrally formed by cutting out from a single member.

  Here, when the stem portion and the needle portion of the needle valve are separately provided by a plurality of members and are configured to be interlocked by engaging them, for example, highly accurate needle lift adjustment, that is, It becomes difficult to achieve high-accuracy flow rate adjustment. Moreover, when it forms and integrates, after providing in a different body, there exists a possibility that hydrogen may embrittle the welding site | part. For this reason, the needle of the high pressure hydrogen needle valve needs to be integrally formed, and the needle 25 of the present invention is extremely suitable as the needle of the ultra high pressure hydrogen valve.

  An annular protrusion 26 is formed in the middle of the needle rod 25b, and the cylindrical part below the annular protrusion 26 in FIG. 3 is a sliding part that comes into contact with a seal member provided in the shaft mounting part. . In FIG. 3, the cylindrical portion above the annular protrusion 26 has a smaller diameter than the lower cylindrical portion. In FIG. 3, a male thread portion 27 is formed at the upper end portion, and one or more nuts 34 are screwed. Is possible.

  The sleeve 28 is a cylindrical member for transmitting the turning force of the handle 21 to the needle 25 to move it up and down. As shown in FIG. 3, the sleeve 28 has a flange portion 30 having an enlarged diameter at the lower end portion. A tapered surface 31 is provided at the upper corner of the portion 30. The tapered surface 31 is adapted to engage with the locking portion 19 of the cap 15. An external thread portion 29 is formed in the middle of the sleeve 28, and is formed on the inner peripheral surface of the cap 15, so that it can be screwed into the thread portion 20. Further, a locking portion 23 is formed in the upper end portion of the sleeve 28 so that the set screw 22 can be locked.

  A needle rod 25 b of the needle 25 is inserted into the cylindrical sleeve 28, and the sleeve 28 is attached to the needle 25. A sliding washer 32 interposed between the upper end surface of the sleeve 28 and the nut 34 is in contact with the upper end surface of the sleeve 28, and a sliding washer 33 interposed between the annular protrusion 26 and the lower end surface of the sleeve 28. It touches. After the needle rod 25b is mounted on the sleeve 28 together with the sliding washers 32 and 33, when the screwing of the nut 34 is tightened, the sliding washer 32 is pressed by the nut 34 and the needle 25 is tightened between the sliding washers 32 and 33. Then, the elevating member 40 is assembled. For example, two nuts 34 may be screwed together, and a screw lock agent may be applied to the upper nut.

  1 and 2 show sectional views of the display cylinder 24. The display cylinder 24 is formed to have the same thickness as the cap 15 and has a cylindrical through-hole 37, and the sleeve 28 passes through the through-hole 37. A cylindrical portion having the same shape as the upper portion of the cylindrical cap 15 is formed on the lower side inside the display cylinder 24 so as to open downward. The cylindrical portion adheres to the upper portion of the cap 15. Is fixed. In addition, a horizontal hole 38 may be formed in the display cylinder 24 and attached to the cap 15, and then a set screw may be screwed into the horizontal hole 38 to lock the display cylinder 24 to the cap 15. .

  FIG. 4 is a front view of the high-pressure needle valve of the present invention, and FIG. 7 is an enlarged view of a main part of the display cylinder 24 in FIG. FIG. 5 is a side view of the high pressure needle valve of the present invention, and FIG. 6 is a perspective view of the high pressure needle valve of the present invention.

  As shown in FIGS. 4 to 6, the display cylinder 24 is provided with a display surface 35, and a display scale 45 is displayed on the display surface 35. The display surface 35 is a stepped surface formed by cutting out a part of the upper portion of the display cylinder 24 into a stepped shape facing a predetermined direction, and one stepped portion surface is formed in the valve front direction. However, a plurality of surfaces may be formed. For example, two display surfaces facing each in the valve front direction and the valve back direction may be formed. Further, if the set screw of the horizontal hole 38 is loosened, the display cylinder 24 can be appropriately rotated. Therefore, the display direction of the display surface 35 may be appropriately changed. Reference numeral 110 denotes a joint connected to the inlet 11, and 120 denotes a joint connected to the outlet.

  A display portion 46 is provided on the outer peripheral surface of the sleeve 28. In order to make this display unit 46 visible from the outside, a through window 36 is provided on the display surface 35. As an example of the through window 36, a gap between the display surface 35, which is a stepped surface, and the through opening 37 is cut out, and a width is appropriately adjusted. The display portion 46 of the sleeve 28 that moves up and down can be visually recognized through this gap.

  As shown in FIG. 7, the display scale 45 displayed on the display surface 35 and the display unit 46 provided on the outer peripheral surface of the sleeve 28 are displayed so as to correspond to each other, and the valve opening can be easily visually recognized from the outside. It has become. As an embodiment of the display scale 45, as shown in the figure, the letter “O” indicating the valve fully open at the top and the letter “S” indicating the valve fully closed at the bottom are displayed, and each letter “O”, “ A scale of one long horizontal line is attached to “S”, and a single scale of one short horizontal line indicating the intermediate opening is attached to the midpoint position of these two long horizontal lines. Similarly, the display unit 46 also has a single horizontal line opening indication. The display mode of the display scale 45 and the display unit 46 is not particularly limited and can be arbitrarily selected as long as the opening degree of the valve can be visually recognized from the outside due to the mutual display correspondence.

  As described above, the display cylinder 24 of the present invention has a high strength and is difficult to be deformed, and is firmly fixed to the upper part of the cap 15, so that it is not easily damaged by an external force and the display scale is not shifted. For this reason, even when the fluid is ultra high pressure hydrogen of about 99 MPa, durability and accuracy as the opening degree display are ensured, and the operability of the high pressure needle valve and the safety of work are ensured. Further, since the display cylinder 24 has a simple structure, it has high versatility and is not limited to a needle valve, and can be applied to various valves, and productivity and mass productivity are improved.

  The material of the body 10 is formed by machining from an alloy material such as SUS316, and the material of the seal member is made of SUS316L, the ground 42 is made of SUS316, the gland packing 43 is made of PEEK, and the gland packing 44 is made of gland 42 If it is made of PE, it has high pressure resistance and corrosion resistance, and is suitable for ultrahigh pressure hydrogen. As for the flow path of the body 10, the flow path axis of the inlet 11 and the flow path axis of the outlet 12 are a two-way valve straight type parallel to each other. Depending on the fluid control situation, such as a shaft that is coaxial with the needle), a three-way valve manifold type (having two outlets communicating with one inlet and two opposing valve seats) The flow channel type may be changed as appropriate.

  When the cap 15 is screwed into the body 10, the lower end surface of the cap 15 presses the upper surface of the ground 42 downward. By the pressing of the gland 42, the gland packings 43 and 44 (seal member) are compressed in the vertical direction between the gland packing 43 and 44 (seal member) and the gland ring 41 to which the lower surface is fixed. Due to this compression, stress is generated in the gland packings 43 and 44 (seal members) so as to bulge in the lateral direction. Thus, the space between the needle portion 25a and the body 10 is sealed. For this reason, if the cap 15 screwed to the body 10 is tightened with the nut 17, the sealing performance of the gland packings 43 and 44 deteriorated by use can be recovered.

  Next, the operation from fully closed to fully opened of the high pressure needle valve of the present invention will be described. FIG. 2 shows a fully closed state of the valve. The needle portion 25a of the needle 25 is in close contact with the valve seat port 13 to seal the fluid. From this state, when the operator rotates the handle 21 in the opening direction, the rotational force is transmitted to the sleeve 28 and the sleeve 28 is rotated. Since the male threaded portion 29 of the sleeve 28 is screwed with the female threaded portion 20 of the cap 15, the male threaded portion 29 of the sleeve 28 moves up the female threaded portion 20 of the cap 15 as the sleeve 28 rotates.

  On the other hand, the needle 25 is held in a state where the needle portion 25a is tightly fitted to the gland packings 43 and 44 (seal member), and when the sleeve 28 is raised while rotating, the upper surface of the sleeve 28 is rotated and a sliding washer is rotated. The sliding washer 32 pushes up the nut 34, acting to push up 32. The action of the sleeve 28 pushing the needle 25 in this way is the same when the valve is closed. When the handle 21 is rotated in the closing direction, the male thread portion 29 of the sleeve 28 causes the female thread portion 20 of the cap 15 to move. The lower end surface of the sleeve 28 acts to push down the sliding washer 33, and the sliding washer 33 pushes down the annular protrusion 26. Since the sleeve 28 operates in this manner, the needle portion 25a (needle 25) can be slid up and down while keeping the needle member 25a (needle 25) non-rotating with respect to the seal member (body 10).

  In the present invention, a sliding washer 32 is interposed between the upper end surface of the sleeve 28 and the nut 34, and a sliding washer 33 is interposed between the lower end surface of the sleeve 28 and the annular protrusion 26. For this reason, the sliding resistance generated on the upper end surface and the lower end surface of the sleeve 28 can be extremely reduced, and wear and deterioration generated between the sleeve 28 and the needle 25 can be prevented. It should be noted that it is preferable if a treatment for further improving the sliding property and durability, such as applying a sliding agent between the needle 25 and the sliding washers 32 and 33, is preferable.

  FIG. 1 shows a fully opened state of the valve. In this state, the tapered surface 31 provided on the collar portion 30 of the sleeve 28 abuts against and engages with the tapered locking portion 19 provided on the inner peripheral surface of the cap 15, and the rise of the sleeve 28 is stopped. ing. Due to this engagement, the male threaded portion 29 of the sleeve 28 cannot raise the female threaded portion 20 to the upper side from the lift stop position, so the sleeve 28 cannot be rotated in the opening direction from this state. The valve is fully open.

  As described above, according to the present invention, the sleeve 28 as the elevating member 40 is provided with the collar portion 30 having a high strength and a simple structure, and the cap 15 is provided with the locking portion 19 that contacts the collar portion 30 to fully open the valve. This lift stop mechanism reliably prevents excessive rotation of the sleeve 28 even if the handle 21 rotates excessively when the valve is fully open, There is no risk of damage or failure of the high pressure needle valve.

  Next, the correspondence between the display scale 45 and the display unit 46 will be described. As described above, the sleeve 28 moves up and down in the range from the valve fully open to the valve fully closed, and accordingly, the opening degree display of the display unit 46 also moves up and down. In the fully open state of the valve, as shown in FIG. 7, the long horizontal line of the display scale 45 with the letter “O” and the horizontal line of the display unit 46 are substantially horizontal in the viewpoint from the front of the display surface 35. It corresponds to the displayed position. Similarly, in the fully closed state of the valve, the long horizontal line of the display scale 45 with the letter “S” and the horizontal line of the display unit 46 are positioned so as to be substantially horizontal when viewed from the front of the display surface 35. Display and correspond. Therefore, the interval between the two long horizontal lines with the letter “O” and the letter “S” on the display scale 45 is substantially the same as the valve stroke.

  FIG. 8 shows a hydrogen station using the high-pressure needle valve of the present invention. The hydrogen station has, for example, a pressure accumulator 70, a compressor 71, a dispenser 72, a precool heat exchanger 73, a quick joint 74, a filling hose 75, a filling nozzle 76, an on-vehicle tank 77, and a check valve 85, which are high pressure. The system is configured as a hydrogen supply line 78.

A manual valve 81 is provided at a connection site or supply line 78 of each unit of the hydrogen station, and an automatic valve 80 is appropriately provided on the primary side or secondary side of each unit. The manual valve 81 uses the high-pressure needle valve in the present invention.
Furthermore, the interior of the pressure accumulator 70 is divided into a plurality of tanks, and by appropriately switching the valve 80 connecting each tank and the compressor 71 and the valve 80 connecting each tank and the dispenser 72, Hydrogen is supplied to the dispenser 72 from the tank that has reached a predetermined pressure, while the tank that has fallen below a predetermined lower limit pressure is filled with hydrogen from the compressor 71 until the predetermined pressure is reached. In the supply line 78 provided in this hydrogen station, hydrogen supply is controlled by a predetermined program, and hydrogen supply can be controlled appropriately according to the amount of vehicle supply.

DESCRIPTION OF SYMBOLS 10 Body 11 Inlet 12 Outlet 13 Valve seat port 14 Female thread part 15 Cap 16 Male thread part 19 Locking part 20 Female thread part 21 Handle 22 Set screw 23 Locking part 24 Display cylinder 25 Needle 25a Needle part 25b Needle ２６ 26 Annular projection 28 Sleeve 29 Male thread portion 30 鍔 portion 31 Tapered surface 32, 33 Sliding washer 34 Nut 35 Display surface 36 Through window 40 Elevating member 43, 44 Gland packing (seal member)
45 Display scale 46 Display section 81 Manual valve

Claims (6)

  In a high-pressure needle valve in which a needle portion is moved up and down in a non-rotating manner at a valve seat in a body having an inlet and an outlet so that high-pressure fluid can be opened and closed or the flow rate can be adjusted, a vertical direction of a cap screwed on the body An elevating member is provided inside the axial direction so that it can be screwed together, and a handle is fixed to the upper part of the elevating member, and the elevating member has a needle rod extending integrally with the needle portion on the outer periphery. The sleeve having a male thread portion is configured to be non-rotating and capable of moving up and down as the sleeve moves up and down, and a collar portion provided at the lower end of the sleeve is provided at a lift stop position in the cap. A high-pressure needle valve characterized by being engaged with an engaging portion.   The high-pressure needle valve according to claim 1, wherein a sliding washer is provided between a lower surface of the flange portion and an upper surface of an annular protrusion provided in the middle of the needle rod.   3. The high-pressure use according to claim 1, wherein an upper portion of the sleeve is fixed to the handle with a set screw, and a sliding washer provided on an upper end surface of the sleeve is fixed with a nut screwed to an upper end of the needle rod. Needle valve.   A display cylinder having the sleeve penetrated is fixed to an upper portion of the cap, a display scale is provided on a display surface formed by cutting out a part of the display cylinder, and the display scale and a display section provided on the sleeve; The high pressure needle valve according to any one of claims 1 to 3, wherein the lift position of the lift member can be visually recognized by corresponding to each other.   The display cylinder has a display surface formed by notching at least one upper surface of the display cylinder in a stepped shape, and a through window for exposing the display portion of the sleeve is formed on the display surface. The high pressure needle valve according to claim 4.   A hydrogen station using the high-pressure needle valve according to any one of claims 1 to 5 in a high-pressure hydrogen supply line.

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