JP2015190517A - Valve for compressed gas, pipe joint having the same and compressed gas portable device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a valve for compressed gas capable of performing a smooth changing-over from a supplying state for supplying compressed air to a supplying side to a discharging state in which the compressed air at the supplying side is discharged outside.SOLUTION: A valve for compressed gas comprises: a feeding-in flow passage 16 where compressed gas supplied from a compressed gas supplying source is fed; a supplying flow passage 18 where the fed-in compressed air is supplied to a segment to be supplied; a valve body 20; and an operating part 22 for operating an angle of the valve body 20. In addition, the valve body 20 is formed with a first flow hole and a second flow hole. Then, a position and a size of each of the first flow hole and the second flow hole are set in such a way that the compressed gas may not be flowed in from the feeding-in flow passage 16 via the first flow hole under a transition state from the supplied state to the discharging state.

Description

  The present invention relates to a compressed gas valve that controls supply of compressed gas to a supply flow path, a pipe joint having the valve, and a compressed gas carrying device.

  Conventionally, a valve has been refurbished in a path through which compressed air supplied to a device using compressed air that uses compressed air passes. By opening this valve, compressed air is supplied to the device using compressed air, and by closing this valve, the supply of compressed air is stopped.

  As this valve, a ball valve having a ball valve in which a through hole is formed at a predetermined position may be employed (Patent Document 1).

  Further, Patent Documents 2 to 4 below describe a valve having a path for releasing the supply-side residual pressure to the outside when the fluid supply channel is closed.

  Referring to FIG. 1 of Patent Document 2 and this explanation, a spherical valve B is accommodated in a casing C provided with valve seat packings 8 and 9. The operation handle portion H communicates and blocks the through hole 10 and the entrance / exit with a ball valve. The casing is provided with a fluid discharge path 16 that does not communicate with any of the inlets and outlets, and the spherical valve has a communication path that connects one of the inlets and outlets to the fluid discharge path when the inlet and outlet are not in communication with each other. A passage 18 is formed.

  Referring to FIG. 1 of Patent Document 3 and the explanation thereof, the first communicating hole 22 that communicates the secondary opening 4 and the discharge portion 18 in the non-communication state with the valve body 9, and the secondary side A second communication hole 23 communicating with the gap 16 between the opening 4 and the stem portion of the valve body 9 is formed. Accordingly, the gap 16 is communicated with the discharge portion 18 through the gap 17 on the outer periphery of the valve body 9.

  Referring to FIG. 1 of Patent Document 4 and the explanation thereof, the valve replacement valve 4 is built in the valve body 2 interposed between the hose 12 and the air pipe 14. A valve passage 46 and a pressure relief hole 48 are formed in the valve exchange valve 4. When the supply flow path is closed by the switching valve 4, the residual pressure on the hose 12 side is opened to the outside through the pressure relief hole 48.

JP 2003-35374 A Japanese Utility Model Publication No. 5-71550 JP-A-10-61790 Japanese Utility Model Publication No. 1-94676

  However, the mechanisms described in Patent Document 2 to Patent Document 4 described above have a problem that the residual pressure cannot always be satisfactorily released to the outside when the valve is closed.

  Specifically, referring to FIG. 1 of Patent Document 2, a flow path for releasing the residual pressure is formed as a gap between the valve seat packing 8 and the communication groove 18 formed in the rest valve B. Therefore, if the valve seat packing 8 made of resin or the like is deformed, there is a fear that it is difficult to appropriately secure a path for releasing the residual pressure.

  Referring to FIG. 1 of Patent Document 3, a plurality of communication holes 22 and 23 for releasing residual pressure are formed in the valve body 9. However, depending on the relative positional relationship between the communication holes 22, 23 provided in the valve body 9 and the flow hole 21, when the valve body 9 is rotated and shifted to the discharge state, the primary pressure flows out to the outside. There was also a fear of doing.

  Referring to FIG. 2 of Patent Document 4, the valve switching valve 4 is formed with a valve passage 46 through which air passes under use conditions and a pressure relief hole 48 through which pressure is released when closed. However, referring to FIG. 2, since a part of the valve path 46 functions as a path for releasing the residual pressure, it may be difficult to set an optimum size path for releasing the residual pressure. .

  The present invention has been made in view of such problems, and the object of the present invention is from a supply state in which compressed gas is supplied to the supply side to a discharge state in which compressed gas on the supply side is released to the outside. The object is to provide a compressed gas valve that can be switched smoothly.

  The compressed gas valve according to the present invention includes an introduction channel into which compressed gas supplied from a compressed gas supply source is introduced, a supply channel into which the introduced compressed gas is supplied to a supply side, and the supply flow. A discharge flow path for discharging the compressed gas existing in the passage to the outside, a valve body disposed at a position in contact with the introduction flow path, the supply flow path, and the discharge flow path, and an angle of the valve body are manipulated A first flow hole through which the compressed gas flows through the valve body and flows from the introduction flow path to the supply flow path, and the valve body. A second flow hole that is provided through a region different from the first flow hole and through which the compressed gas discharged from the supply flow path to the outside passes is formed, and the operation portion is operated. By the above, from the introduction flow path via the first flow hole of the valve body It is possible to switch from a supply state in which the compressed gas flows to the supply flow path to a discharge state in which the compressed gas flows from the supply flow path to the discharge flow path via the second flow hole of the valve body. The position and size of the first flow hole and the second flow hole in the valve body are in a transition state from the supply state to the discharge state, and the first flow hole of the valve body The compressed gas is set so as not to flow into the discharge flow path from the introduction flow path via the.

  According to the present invention, the position and size of the first flow hole and the second flow hole inside the valve body are in the transition state from the supply state to the discharge state, and pass through the first flow hole of the valve body. Thus, the compressed gas is set so as not to flow from the introduction channel to the discharge channel. Therefore, since the outflow of compressed gas to the outside is prevented in the transition state in which the valve is rotated, the safety and the like when operating the valve are improved.

It is a figure which shows the pipe joint of this invention, (A) is a perspective view which shows a pipe joint, (B) is sectional drawing which shows the case where a pipe joint is cut | disconnected along an axial direction. It is sectional drawing which decomposes | disassembles and shows the pipe joint of this invention. It is a perspective view which shows the valve body etc. which are contained in the valve for compressed gas of this invention, (A) shows a supply state, (B) shows a discharge | release state. It is a figure which shows the valve body contained in the valve | bulb for compressed gas of this invention, (A) is a perspective view, (B) is the figure which looked at the valve from the upper surface, (C) is sectional drawing. It is a figure which shows operation | movement of the valve | bulb for compressed gas of this invention, (A), (C) and (E) are top views which show the state of the operation part in each step, (B), (D) and (F) is a top view which shows the state of the valve body in each step. It is a top view which shows the compressed gas carrying apparatus of this invention.

  With reference to FIG. 1, the structure of the pipe joint 11 which concerns on this form is demonstrated. FIG. 1A is a perspective view showing a pipe joint 11 including a valve 10 of the present embodiment, and FIG. 1B is a cross-sectional view showing a state in which the pipe joint 11 is cut along the axis at a central portion.

  In the following description, the description may be made using the X direction, the Y direction, and the Z direction. The X direction and the Y direction indicate the radial direction of the conduit portion of the pipe joint 11, and the Z direction indicates the axial direction of the conduit portion of the pipe joint. In the pipe joint 11 of this embodiment, compressed air flows from the −Z direction toward the + Z direction. In the present embodiment, a case where compressed air is employed as the compressed gas flowing through the pipe joint 11 will be described. However, other than air may be employed as the compressed gas.

  Referring to FIG. 1A, a pipe joint 11 according to the present embodiment includes a valve 10 containing a valve body (not shown), a plug portion 14 connected to the −Z side of the valve 10, and a + Z side of the valve 10. The socket part 12 connected and the operation part 22 which rotates the valve body incorporated in the valve | bulb 10 are mainly provided. The function of the pipe joint 11 is to allow compressed air to pass from the plug part 14 side to the socket part 12 via a valve body or the like built in the valve 10. Moreover, this supply can also be interrupted by rotating the operating portion 22 in a predetermined direction to change the orientation of the valve body. At this time, the valve 10 is provided with a path for discharging the compressed air remaining in the socket portion 12 to the outside. This matter will be described later with reference to FIGS.

  The plug part 14 is connected to compressed air generating means such as a compressor through a socket and a hose (not shown). On the other hand, the socket portion 12 is connected to a compressed air using device such as an actuator or a nailing machine for assisting the movement of the human body via a plug (not shown).

  With reference to FIG. 1 (B), the valve body 20 is incorporated in the valve | bulb 10 arrange | positioned in the center part in the axial direction of the pipe joint 11. FIG. And the discharge flow path 19 is formed from the hole provided in the lower surface of the housing | casing which comprises the valve | bulb 10. FIG. This discharge flow path 19 is a compression that exists inside the socket section 12 on the downstream side of the gas flow path after the valve body 20 is rotated by operating the operation section 22 to block the path through which the compressed air flows. Air is released to the outside.

  Inside the plug portion 14 is formed an introduction flow path 16 into which compressed air supplied from a compressor or the like is introduced. Further, a supply flow path 18 through which compressed air supplied to a compressed air using device such as an operation assisting device flows is formed inside the socket portion 12. The introduction flow channel 16 and the supply flow channel 18 communicate with each other via a flow hole penetrating the valve body 20 in the supply state in which the compressed air is supplied to the use device side. Therefore, the compressed air flows from the introduction flow channel 16 to the supply flow channel 18 via the communication hole that penetrates the valve body 20.

  The structure of the pipe joint 11 described above will be described in detail with reference to FIG. In this figure, the cross section which separated each component which comprises the pipe joint 11 is shown. Each part constituting the pipe joint 11 is made of a ground metal material except for resin parts such as the operation unit 22 and the packing 52.

  The valve main body 30 is disposed in the central portion of the pipe joint 11 and has a main body portion having a substantially cubic shape and a cylindrical opening that continuously protrudes upward from the main body portion. The valve body 20 is housed in the main body portion of the valve body 30. Further, the + Z side and −Z side side surfaces of the main body portion of the valve body 30 are formed with openings into which a base portion 23 and the like described later can be inserted. Further, a hole 74 is formed that penetrates the bottom surface of the valve body 30 and serves as a discharge path for releasing the residual pressure.

  The valve body 20 has a main body portion that has a substantially spherical shape and a protruding portion that protrudes upward from the main body portion, and is accommodated in the valve main body 30. The protruding upper end portion of the valve body 20 is housed in a cylindrical portion formed on the upper portion of the valve body 30.

  The shaft 32 is a substantially columnar member made of a metal material and has a function of transmitting the rotational force of the operation unit 22 to the valve body 20. A concave portion is formed at the lower end of the shaft 32 to be fitted to the upper projecting portion of the valve body 20. Further, the upper end portion of the shaft 32 has a substantially rectangular shape, and the upper end portion is fitted into a concave region formed inside the operation portion 22. Accordingly, the shaft 32 and the valve body 20 are rotated in synchronization with the rotation of the operation unit 22.

  The operation unit 22 has a main body portion that has a substantially cylindrical shape, and a tongue-shaped portion that is continuous in a tongue shape from the main body portion to the side. The main body portion is disposed so as to close a cylindrical portion formed on the upper portion of the valve main body 30. And the valve body 20 can be rotated because a user operates a tongue-shaped part and rotates the operation part 22. FIG.

  The insertion pin 48 is inserted from above the operation portion 22, and the tip portion thereof is screwed into the upper portion of the shaft 32. Thereby, the operation part 22 and the shaft 32 are fastened. Further, the cover 50 is fitted into the concave area of the operation portion 22 where the insertion pin 48 is inserted.

  On the −Z side of the valve body 30, a plug portion 14 including a base portion 23, an orifice 28, and a tip base portion 26 is incorporated. The base portion 23 is a cylindrical member having an axis extending in the Z direction, and an end portion on the + Z side is connected to an opening on the −Z side of the valve body 30. For this connection, a thread formed on the base portion 23 may be screwed into a thread groove formed on the valve body 30, or an adhesive may be applied to the connection portion between the two, or these connections may be made. A structure may be used in combination. This connection structure is the same also in the connection location of other members.

  Further, the packing 54 is refurbished between the + Z end portion of the base portion 23 and the valve body 20. The packing 54 is made of a resin material molded in an annular shape, and is assembled in a state of being inserted into an end portion on the + Z side of the base portion 23. The vicinity of the inner end portion in the radial direction of the packing 54 on the + Z side is in contact with the spherical portion of the valve body 20, thereby ensuring the slidability and airtightness of the portion where the valve body 20 and the base portion 23 are in contact. .

  The orifice 28 is built in the base 23 and has a cylindrical shape having a central axis in the Z direction. A flow hole is formed by elongating the central portion of the orifice 28 in the Z direction, and the supply amount is limited to a certain value or less by passing compressed air through the flow hole.

  The distal end base portion 26 has an end portion provided with an opening on the side surface on the −Z side, and the end portion is connected to the base portion 23 on the + Z side.

  On the + Z side of the valve main body 30, each component constituting the socket portion 12 is arranged.

  Specifically, a substantially cylindrical base 24 is disposed from the −Z side. A packing 52 is fitted into the end of the base 24 on the −Z side. Further, the end portion on the −Z side of the base portion 24 is connected by being screwed to the side surface on the + Z side of the valve body 30.

  The packing 52 is in contact with the surface on the + Z side of the spherical valve body 20 in the same manner as the above-described packing 54, thereby ensuring the slidability and airtightness of the portion where both are in contact.

  The valve 38 is a member for closing the supply flow path 18 when no plug is inserted into the socket portion 12. The valve 38 is biased by a spring 96 in the + Z direction. The valve 38 has a diameter-enlarged portion at the −Z side end, and has a thin cylindrical shape on the + Z side. An annular contact portion 40 is disposed on the + Z side of the valve 38, and a diameter-enlarged portion on the −Z side of the valve 38 contacts the contact portion 40 in a situation where no plug is inserted into the socket. By doing so, airtightness is secured.

  The partition wall portion 42 is a substantially cylindrical portion disposed on the + Z side of the contact portion 40 and has a function of separating the inside and the outside of the base portion 24. An end portion on the + Z side of the partition wall portion 42 is an enlarged diameter portion, and an end portion on the −Z side of the spring 98 is in contact with the enlarged diameter portion.

  The inner pressing portion 44 has an enlarged diameter portion at an end on the −Z side, and a spring 98 is in contact with the enlarged diameter portion. As a result, a biasing force from the spring 98 toward the + Z side is applied to the inner pressing portion 44. The function of the inner pressing portion 44 is to support a steel ball accommodated in the distal end base portion 36 described later from the inside.

  The tip base portion 36 is a cylindrical member connected to the base portion 24 described above, and a plurality of hole portions 102 are formed in the vicinity of the + Z side end portion at substantially equal intervals along the circumferential direction. . The steel ball accommodated in the hole 102 is for latching the plug inserted into the socket 12.

  The outer pressing portion 46 is a member that covers the vicinity of the + Z side end portion of the distal end base portion 36. The outer pressing portion 46 has a function of supporting the steel ball accommodated in the hole portion 102 of the distal end base portion 36 from the outside. A spring 100 is disposed between the outer pressing portion 46 and the distal end base portion 36. Then, under use conditions, the outer pressing portion 46 can be moved to the −Z side to release the fitting with the plug inserted into the socket portion 12.

  With reference to FIG. 3, the structure of the above-described valve body 20 will be described in further detail. FIG. 3 is a perspective view showing the valve body 20 and its accessory members separated from each other. FIG. 3 (A) shows that the introduction flow path 16 and the supply flow path 18 communicate with each other through the first flow hole 60 of the valve body 20. (B) shows a state where the two flow paths are not in communication.

  With reference to FIG. 3 (A), the valve body 20 is comprised from the valve main body 21 which exhibits a spherical shape, and the protrusion part 56 which protrudes upwards from the upper end part of the valve main body 21. As shown in FIG. The protruding portion 56 of the valve body 20 is fitted into a recess 58 formed at the lower end of the shaft 32, and the upper end portion of the shaft 32 is fitted into the operation portion 22. Accordingly, when the operation unit 22 is rotated, the rotational force is transmitted to the valve body 20 via the shaft 32.

  As described above, in the supply state, compressed air is supplied from the introduction flow path 16 to the supply flow path 18 via the first flow hole 60 penetrating the valve body 20 in the Z direction. An annular packing 52 is in contact with the valve body 20 from the supply flow path 18 side of the valve body 20. A portion where the valve body 20 and the packing 52 are in contact is defined as a circular contact circle 25 as viewed from the + Z direction. In this figure, the contact circle 25 is indicated by a dotted line. The same applies to the packing 54, and the portion where the -Z side of the valve body 20 contacts the packing 54 is also defined as a circular contact circle.

  Referring to FIG. 3B, when the operation unit 22 is rotated about 90 degrees counterclockwise in plan view, the shaft 32 and the valve body 20 are also rotated counterclockwise. Accordingly, the first flow hole 60 of the valve body 20 moves to the outside of the packing 52 and the contact circle 25. Thereby, the introduction flow path 16 and the supply flow path 18 are not communicated, and the supply of compressed air to the supply side is shut off.

  Thus, in the shut-off state in which the operation unit 22 is rotated, the opening of the second flow hole 62 is disposed inside the contact circle 25. That is, the supply flow path 18 communicates with the outside via the second flow hole 62 and the internal space of the valve body 30. Thereby, the compressed air staying in the supply flow path 18 can be escaped outside through these flow paths. This matter will be described later with reference to FIG.

  The configuration of the valve body 20 will be described in detail with reference to FIG. 4A is a perspective view of the valve body 20 as viewed from above, FIG. 4B is a view of the valve body 20 as viewed from above, and FIG. 4C is a view of C in FIG. 4B. It is sectional drawing in the -C line.

  4A and 4B, the valve body 20 is integrally formed from a ground metal material, and has a substantially spherical valve body 21 and an upper end of the valve body 21. And a substantially rectangular parallelepiped protruding portion 56 protruding upward.

  A first flow hole 60 is formed through the vicinity of the center of the valve body 21 in the Z direction (the direction in which the compressed air flows). The role of the first circulation hole 60 is to circulate compressed air from the introduction side to the supply side under normal use conditions. The diameter of the first flow hole 60 is, for example, about 1.0 mm. The first flow hole 60 has an opening 66 on the introduction side and an opening 64 on the supply side. Further, the opening 64 and the opening 66 are formed at the same height as the center of the valve body 21.

  The second flow hole 62 is a hole formed at a location not intersecting with the first flow hole 60 inside the valve body 21. The second flow hole 62 has an opening 68 at the same height as the opening 64 of the first flow hole 60, and has an opening 70 at the lower end. The role of the second circulation hole 62 is to release the compressed air remaining on the supply side to the outside after the supply of the compressed air in the usage state is shut off. The opening 68 is the inflow side, and the opening 70 is the outflow side. The diameter of the second flow hole 62 is, for example, about 1.0 mm, similarly to the first flow hole 60.

  Referring to FIG. 4C, the second flow hole 62 includes a first hole 62 </ b> A extending from the opening 68 formed at the side end of the valve body 21 toward the center of the valve body 20, and the valve body. The second hole 62 </ b> B extending upward from the opening 70 formed in the lower portion of the valve 21, and both holes communicate with each other inside the valve body 21. Further, the position where the opening 70 of the second flow hole 62 is formed is not the lower end of the central portion of the valve main body 21 but a position biased rightward on the paper surface. In this way, the workability can be improved by configuring the second flow hole 62 with a plurality of holes having different extending directions.

  Referring to FIG. 4 (B), a radius passing through the outflow side opening 66 of the first flow hole 60 and a radius passing through the inflow side opening 68 of the second flow hole 62 are formed. The angle θ is set larger than 90 degrees, and is 120 degrees as an example. By setting θ to such an angle, the distance between the two along the peripheral edge of the valve body 20 is increased, and, as will be described later, leakage of compressed air via both flow holes is prevented.

  Furthermore, referring to FIG. 4 (B), in other words, the position of the opening 68 of the second flow hole 62, the flow of compressed air is formed from the bottom to the top on the paper surface under use conditions. The opening 68 of the two flow holes 62 is arranged on the upstream side of the flow from the center of the valve body 20.

  With reference to FIG. 5, operation | movement of the above-mentioned valve body 20 is demonstrated. First, FIG. 5A, FIG. 5C, and FIG. 5E arranged on the left side on the paper are plan views of the pipe joint 11 as viewed from above. 5B, FIG. 5D, and FIG. 5F arranged on the right side on the paper surface are sectional views of the state of the valve body 20 as viewed from above. Further, the figures arranged at the same height (for example, FIG. 5A and FIG. 5B) show the states at the same timing.

  In the pipe joint (valve) of this embodiment, three states are taken: a supply state in which compressed air is supplied, a release state in which the residual pressure is released from the system after being shut off, and a transition state in which the supply state transitions to the release state. Each of these states will be described below.

  With reference to FIG. 5 (A) and FIG. 5 (B), the supply state which supplies compressed air is demonstrated. Under normal use conditions, the operation unit 22 faces the axial direction of the pipe joint 11. At that time, the first flow hole 60 formed in the valve body 20 built in the pipe joint 11 is in a supply state. That is, the axial direction of the first flow hole 60 coincides with the axial direction of the pipe joint 11, the opening 66 of the first flow hole 60 is exposed to the introduction flow channel 16 side, and the opening 64 on the opposite side is The supply channel 18 is exposed. Referring to FIG. 3A, at this time, the opening 64 is disposed inside the contact circle between the packing 52 and the valve main body 21, and the opening 66 is inside the contact circle between the packing 54 and the valve main body 21. Is arranged.

  Therefore, under use conditions, compressed air supplied from a supply source such as a compressor flows in the order of the introduction flow path 16, the opening 66, the first flow hole 60, the opening 64, and the supply flow path 18, and a filling tank or the like. Supplied to the supplier.

  At this time, the opening 68 of the second flow hole 62 is not exposed on either the supply channel 18 side or the introduction channel 16 side. Therefore, the compressed air to be supplied to the filling tank or the like does not leak to the outside via the second circulation hole 62.

  With reference to FIG.5 (C) and FIG.5 (D), the transition state which switches from a supply state to a discharge | release state is demonstrated. When the operation unit 22 is rotated counterclockwise, the valve body 20 is also rotated counterclockwise in synchronization therewith. Then, the opening 66 of the first flow hole 60 is prevented from being exposed outside the introduction flow path 16, and the opening 64 is prevented from being exposed outside the supply flow path 18. Thereby, the flow of compressed air is blocked.

  In this embodiment, in this transition state, the first flow hole 60 and the second flow hole 62 do not communicate indirectly. Specifically, if the opening 66 of the first flow hole 60 is exposed to the introduction flow path 16 and the opening 64 is exposed to the supply flow path 18, It is assumed that the opening 68 is exposed to the supply flow path 18. As a result, one end of the compressed air supplied to the supply flow path 18 leaks from the opening 68 to the outside through the second flow hole 62. Therefore, in the present embodiment, as described above with reference to FIG. 4B, the opening 68 of the second circulation hole 62 is located upstream of the center of the valve body 20 in the compressed air flow in the supply state. It is arranged. This prevents the opening 68 of the second flow hole 62 from being exposed to the supply flow path 18 while the openings 64 and 66 of the first flow hole 60 are exposed to the flow paths. Thereby, in the transition state, the compressed air is not exposed to the outside via the second flow hole 62.

  With reference to FIG. 5E and FIG. 5F, the operation unit 22 is further turned counterclockwise, so that the direction of the operation unit 22 is set to be perpendicular to the axial direction of the pipe joint 11. Along with this, the opening 64 of the first flow hole 60 of the valve body 20 moves to the outside of the supply flow path 18, and the opening 66 moves to the outside of the introduction flow path 16.

  In addition, the openings 68 of the second flow holes 62 are exposed to the supply flow path 18 after the openings 64 and 66 of the first flow holes 60 move to the outside of the flow paths. Then, the compressed air remaining in the supply flow path 18 passes through the opening 68 and the opening 70 of the second flow hole 62 and is then discharged to the outside through the hole 74 of the valve body 30 shown in FIG. Thereby, a joint can be pulled out safely.

  With reference to FIG. 6, the compressed gas carrying apparatus 80 to which the above-described pipe joint 11 and valve are applied will be described.

  The compressed gas carrying device 80 is carried, for example, by a worker who performs a care work on his / her back and is used in a state where the tank 82 is filled with compressed air, and the compressed air is used by the worker. Operation can be assisted.

  A plug 84 that communicates with the inside of the tank 82 is provided on the left side surface of the tank 82 on the paper surface. The plug 84 has a shape that can be inserted into the socket portion 12 of the pipe joint 11. Then, by inserting the plug 84 into the socket portion 12 of the pipe joint, the internal flow path of the pipe joint 11 and the plug 84 are brought into communication. Moreover, when removing the pipe joint 11 from the plug 84 of the compressed gas carrying apparatus 80, the socket part 12 shown to FIG. 1 (A) is moved to -Z direction. The operation unit 86 is a valve that can be opened and closed. By opening the operation unit 86, the tank 82 can be filled with compressed air via the pipe joint 11. Further, a safety valve 88 made of, for example, a rupture disk is attached in the vicinity of the operation unit 86.

  A pressure reducing valve 92 communicating with the inside of the tank 82 is formed on the right side surface of the tank 82 on the paper surface. After the pressure of the compressed air stored in the tank 82 is reduced by the pressure reducing valve 92, the compressed air is supplied to a compressed air using device such as an actuator. An operation unit 90 that opens and closes the flow path of the compressed air is also provided between the pressure reducing valve 92 and the tank 82.

  A drain valve 94 is provided at the upper end of the tank 82. By operating the drain valve 94, the compressed air filled in the tank 82 can be discharged to the outside.

  Under usage conditions, first, the pipe joint 11 is inserted into the plug 84, and then compressed air is supplied to the tank 82 from the compressed air generating means such as a compressor via the pipe joint 11. After the supply is completed, the operation unit 22 is rotated to cut off the supply of compressed air, and then the compressed air remaining on the downstream side of the valve 10 (socket part 12 plug or the like) is discharged to the outside. Further, by operating the socket portion 12, the pipe joint 11 is detached from the plug 84.

  In this embodiment, the diameter of the first flow hole 60 (FIG. 3A) formed in the valve body 20 of the pipe joint is made equal to the diameter of the hole formed in the orifice 28 (FIG. 2). Thereby, since the 1st flow hole 60 formed in the valve body 20 also functions as an orifice, the compressed air of the high pressure state supplied from the compressor can be filled slowly in a tank, and the safety | security at the time of filling is ensured. .

  Thereafter, the user can carry the work by carrying the compressed gas carrying device 80 by carrying the tank 82 on the back.

  The above is the description regarding the compressed gas valve of the present embodiment.

DESCRIPTION OF SYMBOLS 10 Valve 11 Pipe joint 12 Socket part 14 Plug part 16 Introduction flow path 18 Supply flow path 19 Release flow path 20 Valve body 21 Valve main body 22 Operation part 23 Base part 24 Base part 25 Contact circle 26 Tip base part 28 Orifice 30 Valve main body 32 Shaft 36 Tip base 38 Valve 40 Contact part 42 Partition part 44 Inner pressing part 46 Outer pressing part 48 Insertion pin 50 Cover 52 Packing 54 Packing 56 Projection part 58 Recess 60 First flow hole 62 Second flow hole 62A First hole 62B First 2 hole 64 opening 66 opening 68 opening 70 opening 74 hole 80 compressed gas carrying device 82 tank 84 plug 86 operation part 88 safety valve 90 operation part 92 pressure reducing valve 94 drain valve 96 spring 98 spring 100 spring 102 hole

Claims (6)

An introduction flow path through which compressed gas supplied from a compressed gas supply source is introduced;
A supply channel through which the introduced compressed gas is supplied to the supply side;
A discharge flow path for discharging the compressed gas existing in the supply flow path to the outside;
A valve element disposed at a position in contact with the introduction flow path, the supply flow path, and the discharge flow path;
An operation unit for operating the angle of the valve body,
The valve body includes a first flow hole that passes through the valve body and passes through the compressed gas flowing from the introduction flow path to the supply flow path, and the first flow hole of the valve body. A second flow hole that is provided through a different region and through which the compressed gas discharged from the supply flow path to the outside passes is formed,
When the operation portion is operated, the second state of the valve body is changed from a supply state in which the compressed gas flows from the introduction flow path to the supply flow path via the first flow hole of the valve body. It can be switched to a discharge state in which the compressed gas flows from the supply flow path to the discharge flow path via a flow hole,
The position and size of the first flow hole and the second flow hole inside the valve body are in a transition state between the supply state and the discharge state, and the first flow hole of the valve body is The compressed gas valve is set so that the compressed gas does not flow from the introduction flow path into the discharge flow path.   In plan view, a central angle formed by a radius passing through the opening on the supply flow path side of the second flow hole and the opening on the supply flow path side of the first flow hole is larger than 90 degrees. The compressed gas valve according to claim 1, wherein   The opening on the supply flow path side of the second flow hole in the supply state is arranged on the upstream side of the flow of the compressed gas with respect to the center of the valve body. The compressed gas valve according to claim 2. The second flow hole has a first hole portion facing the supply flow channel and a second hole portion facing the discharge flow channel in the discharge state,
The compressed gas valve according to any one of claims 1 to 3, wherein the first hole and the second hole have different extending directions. The compressed gas valve according to any one of claims 1 to 4,
A socket connected to one end of the compressed gas valve;
And a plumb portion connected to the other end of the compressed gas valve. An introduction part into which the compressed gas is introduced through the compressed gas valve according to any one of claims 1 to 4,
A tank filled with the compressed gas via the introduction part;
A compressed gas carrying device comprising: a compressed gas supply unit through which the compressed gas supplied from the tank to the device using compressed gas passes.

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