JP6320038B2 - Emergency disconnect coupling - Google Patents

Description

  The present invention relates to emergency detachment couplings.

  For example, in a gas filling device that fills a fuel tank (supplied body) mounted on a vehicle with hydrogen or compressed gas such as CNG (compressed natural gas) as a fuel, a filling nozzle provided at the tip of a hose is connected to the vehicle side Gas is filled by connecting to the connection port. In addition, when forgetting to remove the filling nozzle connected to the vehicle side at the time of gas filling and starting the vehicle, a tensile force of a predetermined value or more acts on the hose, preventing the apparatus main body and the vehicle from being damaged, It is conceivable to cause a gas leak. Therefore, the hose is provided with an emergency release coupling that separates when an excessive tensile force is applied and prevents gas leakage in the hose.

  Here, the configuration of the emergency detachment coupling will be described. FIG. 1 is a longitudinal sectional view of a conventional emergency detachment coupling disclosed in Prior Art Document 1. FIG.

  In FIG. 1, 41 is an emergency detachment coupling provided in the hose of the filling device. The emergency detachment coupling 41 is configured to be separated by the action of tensile stress acting on the hose and prevent gas leakage due to breakage of the hose when the vehicle is started with the filling nozzle connected to the vehicle side. It has become. The emergency detachment coupling 41 is roughly constituted by a casing unit 42, an outflow side shutoff valve (other side shutoff valve) 56, a first coupling pin 65, and a second coupling pin 66.

  The casing unit 42 is roughly constituted by a casing main body 43, an eyebolt 51, a joint member 52, an inflow side shutoff valve (one side shutoff valve) 53, a support ball 55, a guide cylinder 48, and the like. Further, the rod 59 having the first rod side passage 60 and the second rod side passage 61 (other side passage) communicated with the inflow side passage 45 and the valve cylinder 57 constitute a detachment unit. The detachment unit is detachably coupled to the casing unit 42.

  The casing main body 43 is connected to a weighing machine via a wire connected to the eyebolt 51. Further, the casing body 43 is located on the base end side of the projecting cylinder portion 44 disposed on the axis O1-O1, an inflow side passage (one side passage) 45 used as one side passage, and the projecting cylinder portion 44. A rod insertion hole 47 having a socket part 46 and a taper enlarged diameter part 47A extending around an axis O2-O2 substantially orthogonal to the axis O1-O1, and an axial direction extending to the other end side of the socket part 46 A cylindrical guide tube 48 provided in the above, a seal ring 49A, 49B provided in the rod insertion hole 47, and an attachment portion attached to one end side of the socket portion 46 and having a screw hole 50A and an open passage 50B. As a whole, the shape is substantially T-shaped.

  Here, the guide cylinder 48 is a long cylinder screwed to the other side of the socket portion 46. The guide cylinder 48 guides in the separating direction (axis O2-O2 direction) while holding the valve cylinder 57 and the rod 59 of the outflow side shut-off valve 56 at predetermined positions. The guide cylinder 48 is provided with a first coupling pin 65 and a second coupling pin 66 in the radial direction.

  Reference numeral 51 denotes an eye bolt as a latching portion attached to the screw hole 50 </ b> A of the attachment portion 50. Further, the tip of the wire 5 extending from the weighing machine 3 of the filling device 1 is hooked on the eyebolt 51. As a result, when the rod 59 is being filled or immediately after completion of filling and the vehicle is pulled and pulled by the hose, the pulling direction (XB direction) of the rod 59 and the casing unit 42 and the outflow side shutoff valve 56 are separated. The direction (axis O2-O2) to be performed can be matched.

  Reference numeral 52 denotes a joint member on one side attached to the distal end side of the protruding cylindrical portion 44. The joint member 52 is formed with a hose connection port 52A serving as an inflow port, and a hose weighing unit side hose end of the hose is connected to the hose connection port 52A.

  Reference numeral 53 denotes a one-side cutoff valve used as a one-side cutoff valve coaxially accommodated in the inflow side passage 45. The inflow side shut-off valve 53 blocks the inflow side passage 45 from the outside in an emergency in which the casing body 43 and the rod 59 are relatively moved in the XA and XB directions. Further, the inflow side shutoff valve 53 is configured as a poppet valve including a valve seat 53A, a ball valve body 53B, and a valve spring 53C. The ball valve body 53B is provided to be displaceable in the axial direction so as to be separated from and seated on the valve seat 53A inserted in the inflow side passage 45, and is urged in the seating direction (valve closing direction) by the valve spring 53C. ing.

  54 is a relay shaft movably provided in the axial direction in the valve seat 53 </ b> A inserted in the inflow side passage 45, and 55 is disposed between the relay shaft 54 and the rod 59 of the outflow side shut-off valve 56. Support balls as support members are shown. One end of the support ball (support member) 55 is in contact with the outer periphery of the rod 59, and the other end on the opposite side is in contact with the downstream end of the relay shaft 54.

  The relay shaft 54 has an upstream end with which the ball valve body 53B abuts and a downstream end with which the support ball 55 abuts, and is attached so as to be sandwiched between the ball valve body 53B and the support ball 55. It has been. The upper and lower ends of the relay shaft 54 are each formed in a planar shape (disc shape), and extend in the axial direction on the outer periphery of a cylindrical portion that connects between the upstream end and the downstream end. A plurality of gas supply grooves 54A are formed. Therefore, in a normal state where the downstream end of the relay shaft 54 is supported by the support ball 55 and the upstream end is separated from the valve seat 53A, gas passes through the gas supply groove 54A from the valve seat 53A. It is supplied to the first rod side passage 60 and the second rod side passage 61.

  In a normal state where the casing unit 42 and the outflow side shutoff valve 56 are coupled by the first coupling pin 65, the support ball 55 is brought into contact with the outer periphery of the socket insertion portion 59A of the rod 59 via the relay shaft 54. Thus, the ball valve body 53B of the inflow side shut-off valve 53 is supported in an open state. On the other hand, when the coupling by the first coupling pin 65 is released and the rod 59 moves relative to the casing unit 42, the support ball 55 is accommodated in the support ball accommodation hole 59E of the rod 59.

  Next, reference numeral 56 denotes an other-side cutoff valve that is used as the other-side cutoff valve that is located in the guide cylinder 48 of the casing unit 42 and is attached to the socket portion 46. The outflow side shutoff valve 56 shuts out the outflow side passage (other side passage) 62 in an emergency that moves in the separation direction with respect to the casing unit 42. The outflow side shutoff valve 56 is configured as a spool valve including a valve cylinder 57, a rod 59, an outflow side passage 62, a valve spring 63, and the like.

  Reference numeral 57 denotes a cylindrical valve cylinder provided so as to be movable in the axial direction in the guide cylinder 48 and provided coaxially with the rod insertion hole 47. The valve cylinder 57 is fixed by a second coupling pin 66 with a predetermined gap between the other end surface of the socket portion 46. The valve cylinder 57 moves in the direction of the axis O2-O2 when the second coupling pin 66 is broken. Here, the gap between the valve cylinder 57 and the socket portion 46 is set to a length dimension capable of moving the enlarged diameter portion 59C of the rod 59 to the other side in the axial direction to a position where the outflow side passage 62 is blocked. Yes. That is, the valve cylinder 57 constitutes a sleeve of a spool valve that blocks the outflow side passage 62 by moving relative to the rod 59.

  Further, the valve cylinder 57 has a rod insertion hole 57 </ b> A through which the valve cylinder insertion portion 59 </ b> B of the rod 59 is movably inserted. Further, the rod insertion hole 57A is partially enlarged on the other side of the rod insertion hole 57A, whereby the port 60A of the first rod side passage 60 and the second rod side passage 61 shown in FIG. A communication path 57B is provided to communicate with the port 61A.

  On the other hand, three seal rings 58A, 58B and 58C are provided in the rod insertion hole 57A. Of the seal rings 58A, 58B, 58C, the seal rings 58A, 58B prevent hydrogen gas from leaking from the communication passage 57B. The seal rings 58B and 58C block the port 61A of the second rod side passage 61 when the valve cylinder 57 moves relative to the rod 59 in the XA direction. Further, an outer circumferential groove 57 </ b> C that engages with the second coupling pin 66 is formed on the outer peripheral side of the valve cylinder 57.

  59 denotes a rod provided extending in the direction of the axis O2-O2 of the rod insertion hole 47 of the socket portion 46. The rod 59 has a small-diameter socket insertion portion 59A that is separably inserted into the rod insertion hole 47 of the socket portion 46 on one side in the axial direction, and the other side in the axial direction is movable to the rod insertion hole 57A of the valve cylinder 57. A small-diameter valve tube insertion portion 59B is inserted. In addition, a diameter-enlarged portion 59C that is enlarged in a disc shape is formed in an intermediate portion located in the gap between the socket portion 46 and the valve cylinder 57 of the casing unit 12, and a stepped portion is provided at the other end of the valve tube insertion portion 59B. A joint portion 59D on the other side of the attached cylindrical shape is provided.

  On the other hand, a support ball accommodation hole (support member accommodation hole) 59E that opens in the radial direction and serves as a support member accommodation hole is provided on the outer periphery of the socket insertion portion 59A near the XA direction. The support ball receiving hole 59E communicates with the first rod side passage 60 and constitutes a part of the gas supply passage. Further, the support ball accommodation hole 59E accommodates the support ball 55 when the socket insertion portion 59A of the rod 59 moves a predetermined dimension in the XB direction within the rod insertion hole 47 of the socket portion 46. When the support ball 55 is accommodated in the support ball accommodation hole 59E, the relay shaft 54 biased upward by the valve spring 53C moves in the accommodation direction of the support ball 55 and enters the valve seat 53A. Therefore, the ball valve body 53B that contacts the lower end of the relay shaft 54 contacts the valve seat 53A, and the inflow side cutoff valve 53 closes. Thereby, the inflow side shut-off valve 53 prevents gas outflow in an emergency.

  Furthermore, a hose connection port 59F serving as an outflow port is formed in the other joint portion 59D, and the base end of the hose is connected to the hose connection port 59F. Further, an entire circumferential groove 59G that engages with the first coupling pin 65 is formed on the outer peripheral side of the enlarged diameter portion 59C. Accordingly, the rod 59 is fixed at a predetermined position in the axial direction in which the enlarged diameter portion 59C is in contact with the other end surface of the socket portion 46 in a normal use state.

  Reference numeral 60 denotes a first rod-side passage provided near one side of the rod 59 and extending in the axial direction. The first rod side passage 60 is a port 60A having one end side communicating with the support ball receiving hole 59E and the other end side opening in the diameter direction at a position where the other end side can communicate with the communication passage 57B of the valve cylinder 57.

  Reference numeral 61 denotes a second rod-side passage provided near the other side of the rod 59 and extending in the axial direction. The second rod side passage 61 is formed as a passage independent of the first rod side passage 60. The second rod side passage 61 has a port 61A that opens in the diameter direction at a position where one end side can communicate with the communication passage 57B of the valve cylinder 57, and the other end side communicates with the hose connection port 59F.

  Here, the port 60A of the first rod side passage 60 and the port 61A of the second rod side passage 61 communicate with each other via the communication passage 57B of the valve cylinder 57 in the normal use state shown in FIG. . On the other hand, in an emergency in which the casing main body 43 and the rod 59 are relatively moved in the XA and XB directions, the port 61A of the second rod side passage 61 is airtightly closed by the valve cylinder 57.

  Reference numeral 62 denotes the other side passage of the outflow side shut-off valve 56 used as the other side passage. The outflow side passage 62 extends in the axial direction of the rod 59 and communicates the inflow side passage 45 and the hose connection port 59F of the rod 59. The outflow side passage 62 includes a communication passage 57B of the valve cylinder 57, a first rod side passage 60 of the rod 59, and a second rod side passage 61.

  63 is a valve spring provided between the valve cylinder 57 and the joint 59D of the rod 59. The valve spring 63 moves the valve cylinder 57 in the XA direction with respect to the rod 59, that is, the second rod side passage 61. The port 61A is urged in the direction to shut off.

  Reference numeral 64 denotes a detent pin projecting from the enlarged diameter portion 59 </ b> C of the rod 59 toward the socket portion 46. The rotation-preventing pin 64 has a protruding side inserted into the socket portion 46 so as to be separable. Thereby, the rotation prevention pin 64 can prevent the rotation of the rod 59, and the support ball receiving hole 59E of the rod 59 is disposed at a position where it can face the inflow side passage 45.

  Reference numeral 65 denotes a first coupling pin as a coupling member provided between the casing unit 42 and the outflow side shutoff valve 56. The coupling pin 65 is provided by being inserted in the guide cylinder 48 of the casing main body 43 in the radial direction so as to engage with the entire circumferential groove 59G of the rod 59. Moreover, the 1st coupling pin 65 has couple | bonded so that the socket part 46 and the rod 59 of the casing main body 43 may always be positioned in an axis line O2-O2 direction.

  On the other hand, when an external force of a certain level or more is applied in the direction (XA, XB direction) for separating the casing main body 43 and the rod 59, the first coupling pin 65 is broken by the shearing force acting at that time, and the filling device side The rod 59 of the outflow side shut-off valve 56 is allowed to move relative to the casing main body 43 of the casing unit 42 connected to each other via a wire.

  Reference numeral 66 denotes a second coupling pin as another coupling member provided between the guide cylinder 48 and the valve cylinder 57. The coupling pin 66 is provided by being inserted in the guide cylinder 48 in the radial direction so as to engage with the entire circumferential groove 57 </ b> C of the valve cylinder 57. Further, the second coupling pin 66 is formed to be fragile so as to be broken by a force (shearing force) weaker than that of the first coupling pin 65.

  Thus, the second coupling pin 66 normally fixes the valve cylinder 57 at a position having a predetermined gap between the second coupling pin 66 and the other end surface of the socket portion 46. On the other hand, the second coupling pin 66 is broken when the rod 59 moves in the XB direction and is pushed by the enlarged diameter portion 59C, and the outflow side shutoff valve 56 is allowed to be separated from the casing unit 42. To do.

  Next, the operation of the emergency release coupling 41 will be described.

  When the hydrogen vehicle is filled with hydrogen gas by the filling device, the driver may mistakenly start the vehicle and forcibly pull the hose.

  In such an emergency, an external force that pulls the outflow side shutoff valve 56 from the casing unit 42 connected to the weighing machine of the filling device via a wire acts on the emergency release coupling 41.

  When the first coupling pin 65 is broken by the shearing force in an emergency, the rod 59 moves in the XB direction with respect to the socket portion 46 and the valve cylinder 57 of the casing unit 42. As a result, the casing unit 42 accommodates the support ball 55 in the support ball accommodation hole 59E provided in the socket insertion portion 59A of the rod 59. Therefore, the inflow side shutoff valve 53 places the ball valve body 53B in the valve seat 53A. It is seated and closed to shut off the inflow side passage 45. At substantially the same time, the outflow side shutoff valve 56 disposes the outflow side passage 62 by disposing the port 61A of the second rod side passage 61 of the rod 59 between the seal rings 58B and 58C of the valve cylinder 57. As a result, the hydrogen gas inside the inflow side passage 45 of the casing unit 42 and the outflow side passage 62 of the outflow side shutoff valve 56 can be shut off.

  Further, when the rod 59 is pulled in the XB direction, the second connecting pin 66 is not broken until the enlarged diameter portion 59C of the rod 59 comes into contact with the valve cylinder 57 and is pushed in the XB direction. Allow separation. As a result, the second coupling pin 66 can be broken after the shut-off valves 53 and 56 are completely shut off, and the casing unit 42 and the internal hydrogen gas are shut off by the shut-off valves 53 and 56. The outflow side shutoff valve 56 is separated. As described above, the emergency detachment coupling 41 is connected to the casing unit 42 having the inflow side passage 45 with respect to the first rod side passage 60 and the second rod side that are communicated with the inflow side passage 45 constituting the detachment unit. By separating the rod 59 having the passage 61 and the valve cylinder 57, damage to the filling nozzle and the vehicle can be suppressed.

JP 2007-120717 A

  In the emergency detachment coupling configured as described above, when the coupling pins 65 and 66 are cut by the shearing force of the hose pulling force in an emergency, the support ball 55 is provided in the socket insertion portion 59A of the rod 59. By being housed in the support ball housing hole 59E, the inflow side shut-off valve 53 seats the ball valve body 53B on the valve seat 53A and closes the valve, and the inflow side passage 45 is shut off.

  However, since the emergency detachment coupling is inclined according to the pulling direction of the hose, the contact position of the ball valve body 53B with respect to the end surface of the relay shaft 54 varies, and the ball valve body 53B is located upstream of the relay shaft 54. In some cases, the end face of the relay shaft 54 may be contacted at a position shifted in the radial direction from the center (axial center) of the side end. Further, during gas filling or immediately after completion of filling, pressure fluctuation occurs when the gas compressed to high pressure flows through the gas supply groove 54A of the relay shaft 54, so that the relay shaft 54 rattles in the valve seat 53A, May vibrate. Due to such a phenomenon, when the ball valve body 53B is displaced to a position radially displaced from the axis of the relay shaft 54, the pressing force from the ball valve body 53B does not act on the axis of the relay shaft 54, and the relay shaft A force that tilts 54 with respect to the axis acts.

  Therefore, in the conventional configuration as described above, when the support ball 55 is accommodated in the support ball accommodation hole 59E in an emergency, the relay shaft 54 cannot move smoothly in the axial direction, or the ball valve body 53B There is a risk that the valve seat 53A cannot be seated accurately.

  In view of the above circumstances, an object of the present invention is to provide an emergency detachment coupling that solves the above problems.

  In order to solve the above problems, the present invention has the following means.

The present invention provides a casing unit in which a one-side passage and a rod insertion hole are provided so as to intersect each other's axes, and a one-side cutoff valve that shuts off the one-side passage in an emergency is accommodated therein,
An other-side cutoff valve that is provided so as to be separable in the axial direction of the rod insertion hole with respect to the casing unit, has an other-side passage communicating with the one-side passage, and shuts off the other-side passage in an emergency;
The casing unit and the other side shut-off valve are connected to each other, and the casing unit and the other side are broken in an emergency when a certain external force is applied in the separation direction between the casing unit and the other side shut-off valve. A coupling member for separating the shutoff valve;
The other shut-off valve is located on the axis of the rod insertion hole and is provided so as to be movable in the axial direction with respect to the casing unit;
A rod inserted into the valve cylinder and the rod insertion hole so as to be movable in the axial direction;
When the coupling member is broken, the valve body and the rod are relatively moved to block the other side passage,
One side passage of the casing unit is provided with a support member that supports the one-side shut-off valve in an open state on the other end side in the axial direction by one end in the axial direction coming into contact with the rod of the other shut-off valve. ,
The rod of the other-side shut-off valve accommodates the support member when the casing unit and the other-side shut-off valve move in the separating direction, and allows the one-side shut-off valve to close. Provided,
The one-side shut-off valve includes a valve seat inserted into the one-side passage;
A ball disc to be seated on and off the valve seat;
A structure comprising a valve spring that urges the ball valve body in a direction to be seated on the valve seat;
In the one side passage, a relay shaft that is sandwiched between the support member and the ball valve body is provided,
The relay shaft is a support provided along the axis of the relay shaft;
It is formed by a plurality of beams extending radially from the column in the radial direction,
The plurality of beams are inclined at a predetermined angle so that end portions that contact the ball valve body form recesses into which the ball valve body is fitted toward the axial center side of the relay shaft. The
The other end of the relay shaft in contact with the support member is provided in a disc shape .

  According to the present invention, since the ball body is inclined at a predetermined angle so that the ends of the plurality of beams are formed in the recesses toward the axial center side of the relay shaft, the center of the ball valve body is relayed. The direction of force acting on the relay shaft of the ball valve body, even if it contacts the end of the relay shaft in a state shifted from the axis of the shaft, can be moved to the axis of the relay shaft by being guided by the end of the inclined beam Coincides with the axis of the relay shaft. Therefore, the relay shaft can move smoothly in the axial direction in an emergency, and the emergency shut-off operation can be performed reliably. Also, even during normal times, for example, even if the emergency release coupling itself is tilted according to the tension of the hose, the force that tilts the relay shaft by adjusting the ball body to a position that matches the axis of the relay shaft. Since the gas does not act and the gas can smoothly flow through the relay shaft, the reliability during normal operation is also improved.

It is a longitudinal cross-sectional view of the conventional emergency detachment coupling disclosed in Prior Art Document 1. It is a longitudinal cross-sectional view which expands and shows the principal part of the emergency detachment coupling by this invention. It is a longitudinal cross-sectional view which expands and shows the attachment state of the relay shaft which concerns on this invention. It is a figure which shows the structure of the relay axis | shaft which concerns on this invention. It is a perspective view which shows the downstream end part of a relay shaft.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  FIG. 2 is an enlarged longitudinal sectional view showing a main part of the emergency release coupling according to the present invention. In FIG. 2, the same parts as those in FIG. In FIG. 2, the left-right direction is shown opposite to that in FIG. 1.

  As shown in FIG. 2, the inflow side shutoff valve 53 of the emergency release coupling 100 includes a valve seat 53A, a ball valve body 53B, a spring member 53C, and a spring receiver 53D provided in the inflow side passage 45. Further, the valve seat 53A has an annular seat portion 53A1 on which the ball valve body 53B is seated, and an axially extending through hole 53A2 provided inside the seat portion 53A1.

  The relay shaft 110 is inserted through the through hole 53A2 of the valve seat 53A from below. The relay shaft 110 is inserted into the through-hole 53A2 so as to be slidable in the axial direction from below, and is held by the spring force of the spring member 53C that urges the ball valve body 53B upward. Further, the downstream end portion of the relay shaft 110 is in contact with the support ball 55, and the support ball 55 is held between the outer periphery of the rod 59.

  Here, the configuration of the relay shaft 110 will be described. As shown in FIGS. 3 and 4, the relay shaft 110 includes a support column 111 extending on the axis, a downstream end 112 provided at the upper end of the support 111, and an upstream end 114 provided at the lower end. And a plurality of beams 116 </ b> A to 116 </ b> D provided between the downstream end 112 and the upstream end 114. The downstream end 112 is formed in a disc shape and has a circular support ball contact surface 113 on the upper surface.

  The support ball contact surface 113 has a concave portion in the axial center (center), and has a spherical or conical recess. Therefore, the support ball 55 is aligned so as to be in contact with the axis (center) of the support ball contact surface 113 during assembly.

  Four beams 116 </ b> A to 116 </ b> D are arranged radially on the outer periphery of the column 111. Each of the beams 116A to 116D is formed so as to have an interval of 90 degrees in the circumferential direction, and has a cross-shaped cross section when viewed from the axial direction. Gas supply passages 117A to 117D partitioned by the beams 116A to 116D are formed between the beams 116A to 116D. The gas supply passages 117A to 117D are passages through which the gas supplied from the inflow side passage 45 to the first rod side passage 60 in normal times passes.

  The upstream end 114 is formed by the ends of the beams 116A to 116D. In the upstream end portions of the beams 116A to 116D, inclined portions 118A to 118D that are inclined at a predetermined angle so as to form a recess into which the ball valve body 53B is fitted toward the axial center side of the relay shaft 110. Is provided. Each of the inclined portions 118A to 118D has an inclination angle with respect to the axial direction set to, for example, 30 ° to 45 °.

  Since the inclined portions 118A to 118D are inclined so that the outer peripheral side protrudes downward and the shaft center (center) is recessed upward, the ball valve body urged by the spring force of the spring member 53C from below. 53B can be centered on the axis. For example, the pressure in the emergency release coupling 100 generated when the emergency release coupling 100 is tilted by a hose pulling operation, or immediately after the start of filling or when the gas from the emergency release coupling 100 is released. It is conceivable that the ball valve body 53B is eccentrically brought into contact with the outer peripheral side of any of the inclined portions 118A to 118D due to the rapid change. Even if the ball valve body 53B is in contact with the upstream end 114 in a state of being shifted in the radial direction, the ball valve body 53B is in contact with any one of the inclined portions 118A to 118D by the spring force. The position is adjusted in the axial direction by the reaction force. As a result, the ball valve body 53B is guided to a position that uniformly contacts each of the inclined portions 118A to 118D and is held at a position that coincides with the axis (center).

  Thereby, the relay shaft 110 can receive the axial pressing force from the ball valve body 53B at the shaft center. Therefore, the relay shaft 110 is restrained from being tilted with respect to the shaft center by the pressing force from the ball valve body 53B, whereby the through hole 53A2 of the valve seat 53A is twisted and the sliding resistance in the axial direction is increased. This is also prevented. Further, even when the ball valve body 53B is offset, the pressing force is evenly distributed to the inclined portions 118A to 118D by the alignment operation, so that any of the inclined portions 118A to 118D is locally distributed. Deformation can also be prevented. Thereby, since the shut-off operation of the inflow side shut-off valve 53 can be performed more reliably, the reliability of the shut-off operation (valve closing operation) of the inflow side shut-off valve 53 in an emergency is further enhanced.

  Further, during normal times, the gas supply passages 117A to 117D of the relay shaft 110 are also stabilized, so that the gas can be supplied smoothly. Therefore, since the circulation of the gas through the relay shaft 110 is ensured, the reliability at the normal time is also improved.

  Moreover, the step part 120 is provided in the outer peripheral side of each beam 116A-116D. The step portion 120 is at the same height position of the beams 116A to 116D and faces the step portion 122 formed inside the through hole 53A2 of the valve seat 53A. The relay shaft 110 is inserted upward from below the valve seat 53A and is provided so as to be movable in the axial direction (vertical direction). Therefore, the stepped portion 120 provided on the outer peripheral side of each beam 116A to 116D abuts on the stepped portion 122 in the valve seat 53A, so that upward movement in an emergency is restricted.

  As FIG. 5 shows, the connection part of the downstream of each beam 116A-116D and the downstream edge part 112 is R part (curve shape). The R portion is formed, for example, when the relay shaft 110 is mounted with a metal rod on a milling machine and cut with a processing tool such as an end mill.

  When cutting the gas supply passages 117A to 117D one by one from the lateral direction orthogonal to the outer periphery of the round bar, the end mill is separated in the outer peripheral direction of the round bar so as to leave the downstream end 112. When this is done, the R part remains at the corner. And in this Embodiment 1, the connection part of the downstream end 112 of the beam 116A and 116C formed in the same plane direction with respect to an axial center among the four beams 116A-116D becomes R shape. It cuts so that it may become.

  As a result, both sides of the connecting portion with the downstream end portion 112 of the beams 116B and 116D formed in the same plane direction with respect to the axial center among the four beams 116A to 116D become the R portion. On the other hand, the R portion is formed in line symmetry. By arranging the R portion symmetrically with respect to the axial direction, the turning force (rotational torque about the axis) in the rotational direction when the compressed gas in the normal state passes is canceled out. Therefore, since the rotation of the relay shaft 110 around the shaft accompanying the gas flow is suppressed, the operation of shutting off the relay shaft 110 in the axial direction in an emergency is stabilized.

  In the first embodiment, the configuration in which the relay shaft 110 is arranged in such a manner that the four beams 116A to 116D protrude in the orthogonal direction is illustrated as an example. However, the configuration is not limited thereto, and the number of beams is three or six. It is also good.

  Further, in the first embodiment, the case where the downstream side connecting portion of the two beams 116A and 116C among the four beams 116A to 116D has an R shape is given as an example. You may process so that all the connection parts of each beam 116A-116D may become R part.

  Moreover, in the said Embodiment 1, although the inclination angle with respect to the axial direction of each inclination part 118A-118D was 30 degrees-45 degrees, it is good also as inclination angles other than this.

  In the first embodiment, the configuration in which the valve mechanism having the relay shaft 110 is provided in the inflow side shut-off valve 53 has been described. However, the relay shaft 110 may be provided in the outflow side shut-off valve 56. It is. For example, the inflow side and the outflow side can be switched by connecting the filling device side hose for the emergency release coupling to the outflow side joint portion 59D and connecting the nozzle side hose to the inflow side joint portion 52A. Become.

41 Emergency separation coupling 42 Casing unit 43 Casing body 44 Projecting cylinder 45 Inflow side passage (one side passage)
46 Socket part 47 Rod insertion hole 47A Taper enlarged diameter part 48 Guide cylinder 52A Hose connection port 53 Inlet side shutoff valve (one side shutoff valve)
53A Valve seat 53A1 Seat part 53A2 Through hole 53B Ball valve body 53C Valve spring 53D Spring receiver 55 Support ball 56 Outflow side shut-off valve (other side shut-off valve)
57 Valve tube 59 Rod 59E Support ball receiving hole 60 First rod side passage 61 Second rod side passage 62 Outflow side passage (other side passage)
63 Valve spring 65 First coupling pin 66 Second coupling pin 100 Emergency disconnection coupling 110 Relay shaft 111 Post 112 Downstream end 114 Upstream end 113 Support ball contact surface 116A-116D Beam 117A-117D Gas supply Passage 118A-118D Inclined part

Claims (3)

A casing unit in which a one-side passage and a rod insertion hole are provided crossing each other's axes, and a one-side shut-off valve for shutting off the one-side passage in an emergency is housed therein;
An other-side cutoff valve that is provided so as to be separable in the axial direction of the rod insertion hole with respect to the casing unit, has an other-side passage communicating with the one-side passage, and shuts off the other-side passage in an emergency;
The casing unit and the other side shut-off valve are connected to each other, and the casing unit and the other side are broken in an emergency when a certain external force is applied in the separation direction between the casing unit and the other side shut-off valve. A coupling member for separating the shutoff valve;
The other shut-off valve is located on the axis of the rod insertion hole and is provided so as to be movable in the axial direction with respect to the casing unit;
A rod inserted into the valve cylinder and the rod insertion hole so as to be movable in the axial direction;
When the coupling member is broken, the valve body and the rod are relatively moved to block the other side passage,
One side passage of the casing unit is provided with a support member that supports the one-side shut-off valve in an open state on the other end side in the axial direction by one end in the axial direction coming into contact with the rod of the other shut-off valve. ,
The rod of the other-side shut-off valve accommodates the support member when the casing unit and the other-side shut-off valve move in the separating direction, and allows the one-side shut-off valve to close. Provided,
The one-side shut-off valve includes a valve seat inserted into the one-side passage;
A ball disc to be seated on and off the valve seat;
A structure comprising a valve spring that urges the ball valve body in a direction to be seated on the valve seat;
In the one side passage, a relay shaft that is sandwiched between the support member and the ball valve body is provided,
The relay shaft is a support provided along the axis of the relay shaft;
It is formed by a plurality of beams extending radially from the column in the radial direction,
Wherein the plurality of beams, one end abuts the ball valve element, Ri Na inclined at a predetermined angle such that the ball valve element toward the axial center side of said relay shaft to form a recess to be fitted ,
The emergency detachment coupling, wherein the other end of the relay shaft that contacts the support member is provided in a disk shape .   The emergency detachment coupling according to claim 1, wherein a joint portion between the disk-shaped other end of the relay shaft and the beam portion has an R shape. The relay shaft is inserted through a through hole extending in the axial direction of the valve seat,
A first step provided on the outer peripheral side of the beam;
A second step formed in the through hole of the valve seat,
When the coupling member breaks, the movement of the relay shaft in the valve seat toward the support member is restricted by the first step portion coming into contact with the second step portion. The emergency release coupling according to claim 1 or 2.

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