RU2773582C2 - Safety disconnector - Google Patents

Abstract

FIELD: car industry.

SUBSTANCE: invention relates to a safety disconnector capable of preventing the impact of a moment, which occurs when swinging a filling hose, on the safety disconnector, and reliably separating an element of the safety disconnector of the side of a hydrogen refueling device from an element of the side of a vehicle, when a tensile force is applied to the filling hose, more than or equal to a given value. Safety disconnector 100 includes plug (10) of a cylindrical shape, in which there is channel (1A), socket (20), in which there is channel (21A), which is the extension of channel (1A) in plug (10), and a shut-off valve mounted in channel (21A) of socket (20), opened when plug (10) is inserted into socket (20), and closed when plug (10) is disconnected from the socket. In this case, central axes of channels of the plug and the socket form a straight line, filling hose (61) is connected to plug (10), and hose guide (70) for limiting the movement of filling hose (61) is in a position separated from plug (10).

EFFECT: obtaining a safety disconnector for car refueling.

3 cl, 11 dwg

Description

The field of technology to which the invention belongs

SUBSTANCE: invention relates to a fuse disconnector for fueling device such as gasoline, diesel fuel and hydrogen gas, in particular to a fuse disconnector for separating a fueling device and a filling hose from each other in an emergency.

State of the art

For example, as shown in FIG. 11, when the vehicle A is refueling at a filling station, the filling spout 202 mounted on the end of the filling hose 201 and the vehicle side filling port 203 are connected to each other to fill the vehicle side filling port 203 with fuel. In this situation, if the vehicle A moves while refueling and pulls the refueling hose 201, the refueling apparatus falls and fails, and fuel is spilled, so that a dangerous situation occurs. In such a case, an emergency release safety disconnect 300 is installed between the filling device 200 and the filling hose 201, and if a tensile force greater than or equal to a predetermined value is applied to the filling hose 201, the safety disconnect 300 is disconnected to prevent the failure of the filling device 200.

However, in the case where a tensile force greater than or equal to a predetermined value is not applied to the charging hose 201, if the charging hose sways, there is a possibility that the moment due to the swinging of the charging hose 201 affects the connected portion of the element (plug) of the charging hose the vehicle side of the fuse disconnector 300, and the connected section fails, and fuel leaks through the failed section. Normally no measures are taken to prevent the plug of the fuse disconnector 300 from breaking as a result of the torque generated by swinging the charging hose 201.

In other conventional technologies, as the fuse disconnector of the hydrogen gas filling device, fuse disconnectors for emergency disconnection are proposed in which the channels in the plug and socket are orthogonal to each other (see, for example, Japanese Patent Publication No. 2007120717), but the fuse disconnector capable of preventing failure of the fuse disconnector due to the torque generated by swinging the filling hose 201 has not yet been proposed.

The contents of Japanese Patent Publication No. 2007120717 are incorporated herein by reference in their entirety.

Disclosure of invention

Problems to be Solved by the Present Invention

The present invention has been developed in view of the above-mentioned problems of the prior art, and its object is to provide a fuse disconnector capable of preventing failure of the fuse disconnector due to the torque generated by swinging the filling hose, and reliably separating the filling device side element from the vehicle side element when a tensile force greater than or equal to a predetermined value is applied to the refueling hose to prevent failure of the refueling device.

Problem solver

The fuse disconnector 100 according to the present invention is characterized by having a cylindrical plug (10: vehicle side element) in which a channel (1A: female channel) is provided, a socket (20) in which a channel (21A: female channel) is provided, extending to the channel ( 1A) in the plug (10), and a shut-off valve installed in the channel (21A: female channel) of the socket (20), opening when the plug (10) is inserted into the socket (20), and closing when the plug (10) is removed from the socket ( 20), in which the central axes of the channels of the plug (10) and the socket (20) form a straight line, the filling hose (61) is connected to the plug (10), and the hose guide (70, 70A) to limit the movement of the filling hose (61) is in a position separated from the plug (10). Preferably, the fuse disconnector (100) of the present invention is located adjacent to the main portion of the filling hose (61) connected to the filling spout and adjacent to the weighing machine (refueling device).

In the present invention, it is preferable that the hose guides (70, 70A) include outer cylinders (71, 71A), resilient elements (72, 72A) for enclosing the filling hose (61), sections (73, 73A) for accommodating resilient elements, in the cavities of which the elastic elements (72, 72A) are placed, and the covers (74, 74A) engaged with the sections (73, 73A) for receiving the elastic elements to close the cavities, and so that the inner diameters (φ1, φ1A) of the outer cylinders (71, 71A) were larger than the maximum diameter (D1) of the plug (10).

Here, it is preferable that the hose guide (70A) is fixed by the outer cylinder fastening section (75), so that at the end section (lower end section in the plane of Fig. 6) of the section (73A) for accommodating the elastic element of the hose guide (70A) there is a protrusion (73AT) extending radially outward of the hose guide (70A), and that the inner circumferential surface of the outer cylinder attachment portion (75) has a groove (75B) capable of receiving the protrusion (73AT).

In addition, in the present invention, if hydrogen gas is used as a fuel, it is preferable that either the plug (10) or the socket (20) have a pressure relief valve (30), including a main body part (31) made made of metal, connection hole (31B) for pressure relief, communicating with the fuel channel (31A) in the main body (31), plug (32) pressure relief, made of metal with the possibility of insertion into the connection hole (31B) for pressure relief, and tapered portions (stem taper portion 32B of the pressure relief plug (32) and taper portion 31BB of the pressure relief connection hole (31B)) formed in the pressure relief connection hole (31B) and the pressure relief plug (32), respectively, wherein the cone sections have complementary shapes.

In this case, it is preferable that an unloading circuit (31C) for discharging a chargeable fluid (for example, hydrogen gas) be formed, the unloading circuit (31C) communicating with the connection hole (31B) for relieving pressure, and the outlet of the unloading circuit (31C) being made away from the top area of the pressure relief plug (32). In the pressure relief valve (30), it is preferable that the length (L) of the end portion (32A: stem end portion) of the pressure relief plug (32) and the length (HL) of the end portion (31BA: small diameter portion) of the fuel passage side of the connection hole ( 31B) for pressure relief were large.

In the present invention, gaseous fuels such as hydrogen gas may be used as the fuel to be supplied or dispensed, and liquid fuels such as gasoline, diesel fuel, and kerosene may also be used.

Invention Effects

The aforementioned structure of the present invention securely holds the charging hose (61) by the small diameter portions (φ inner diameter portions) of the hose guides (70, 70A) and the end portion of the plug side (10) of the fuse disconnector (100). The swaying of the hose (61) is perfectly stopped in the place held by the small diameter areas (areas with inner diameter φ) of the hose guides (70, 70A) and is not transmitted to the plug (10) of the side of the fuse disconnector (100). Thus, the moment resulting from the swinging of the hose (61) does not act on the plug (10) of the fuse disconnector (100), and this prevents the plug (10) from failing.

In addition, in the fuse disconnector (100) of the present invention, when the inner diameters (φ1, φ1A) of the outer cylinders (71, 71A) of the hose guides (70, 70A) are larger than the outer diameter (D1: maximum diameter) of the plug (10 ) the safety disconnect (100), even if a tensile force greater than or equal to the specified value is applied to the filling hose (61), e.g. due to a sudden movement of the vehicle during refueling, in order to separate the socket (20) and the plug (10) apart, the detached plug (10) passes through the outer cylinders (71, 71A) of the hose guides (70, 70A). Thus, the tensile force applied to the refueling hose (61) does not act on the refueling apparatus, and the refueling apparatus is prevented from falling and failing due to falling.

In the present invention, providing guides (70, 70A) of the hose, including external cylinders (71, 71A), the dimensions of the inner diameters (φ1, φ1A) of which are larger than the maximum diameter (D1) of the plug (10), elastic elements (72 , 72A) to encircle the filling hose (61), sections (73,73A) for receiving elastic elements designed to accommodate elastic elements (72, 72A) in the cavity, and covers (74, 74A) in contact with sections (73 , 73A) to accommodate resilient elements to close the cavity if a tensile force greater than or equal to the specified value is applied to the filling hose (61) to separate the socket (20) from the plug (10), not only the filling hose (61) and the plug (10), but also areas (73, 73A) for receiving elastic elements, covers (74, 74A), elastic elements (72, 72A) of the hose guides (70, 70A) can pass through the outer cylinders (71,71A) in radial direction of the hose guides (70, 70A). In such a case, the plug (10) is reliably moved on the vehicle side away from the hose guides (70, 70A), the tensile force in the direction of the vehicle is not applied to the socket (20) and the fuel filling device, and this reliably prevents the fuel filling device from falling or failing. devices.

Here, when the outer cylinder (71A) is fixed by the outer cylinder fixing portion (75), at the end portion (lower end portion in the plane of Fig. 6) of the hose guide (70A) resilient member receiving portion (73A), a protrusion (73AT) is formed, extending outward in the radial direction of the hose guide (70A), and a groove (75B) is formed on the inner peripheral surface of the outer cylinder attachment portion (75) capable of receiving the protrusion (73AT), while the protrusion (73AT) is inserted into the groove (75B), which prevents rotation relative to each other of the section (75) for fastening the outer cylinder and the section (73A) for accommodating the elastic element. Then, even if the filling hose (61) is twisted, at the point where the filling hose (61) is held by the elastic member (72A), rotation of the charging hose (61) is suppressed, so that the rotational force resulting from the twisting is prevented from affecting the plug (10 ), which could lead to its failure.

In addition, in the present invention, if hydrogen gas is used as a fuel, then if there is a pressure relief valve (30) installed either on the plug (10) or in the socket (20), when the plug (10) and the socket (20) separated from each other, the high-pressure hydrogen gas in the charging hose (61) can be discharged at a low flow rate to the outside of the charging hose (61) (to the outside of the pressure relief valve 30). As a result, rapid discharge of high pressure hydrogen gas and unexpected movement of the charging hose (61) due to rapid discharge of hydrogen gas are prevented.

Brief description of the drawings

The drawings show:

in fig. 1 - fuse disconnector with hose guide according to one of the embodiments of the present invention, a view in section;

in fig. 2 - the state in which the plug and socket of the fuse disconnector are separated from each other and the plug is pulled out together with the filling hose and the internal elements of the hose guide;

in fig. 3 is a state in which the plug and socket of the fuse disconnector are connected to each other according to the embodiment, sectional view;

in fig. 4 is a state in which the plug and socket of the fuse disconnector are disconnected from each other according to another embodiment, a sectional view;

in fig. 5 is a hose guide different from the hose guide shown in FIG. 1 and 2, perspective view;

in fig. 6 – the same, sectional view;

in fig. 7 – the same, bottom view;

in fig. 8 is a pressure relief valve according to an embodiment, sectional view;

in fig. 9 is the same, sectional view along line C-C shown in FIG. eight;

in fig. 10 is a state in which the raised pressure relief plug allows hydrogen gas to flow out of the discharge circuit, sectional view; and

in fig. 11 is a block diagram illustrating the configuration of the refueling station.

Implementation of the invention

The following describes one of the embodiments of the present invention with reference to the accompanying drawings. As described above, the fuel dispensed or dispensed by the fuel dispensing device of the present invention can be gaseous fuel such as hydrogen gas, liquid fuel such as gasoline, diesel fuel and kerosene, and as shown in the drawings , the case where the fuse disconnector is installed on the hydrogen refueling device for refueling a vehicle with hydrogen gas is explained.

In FIG. 1, reference numeral 100 denotes a fuse disconnect assembly (pipe connection for emergency disconnect) in one embodiment. The fuse disconnector 100 includes a cylindrical plug 10 and a socket 20. When the plug 10 and socket 20 are connected to each other, the shut-off valves in plug 10 and socket 20 are opened to allow communication between the female conduit 1A (FIG. 3) and the female conduit 21A (Fig. 3). As explained below with reference to FIG. 3 and 4, in Fig. 1, plug 10 and socket 20 are connected to each other, but when plug 10 is separated from socket 20, the shut-off valves in them are closed, as shown in FIG. 2. The plug 10 is generally installed on the side of the vehicle (lower side in the plane of FIG. 1), and the socket 20 is generally installed on the side of the hydrogen charging device (or dispenser, weighing device). However, it is possible to install the plug 10 on the side of the hydrogen charging device and the socket 20 on the side of the vehicle.

In FIG. 1 and 2, receptacle 20 is mounted on a hydrogen charging device, not shown, via main member 80. For example, as shown in FIG. 3, the center axes of the channel in plug 10 (female channel 1A) and the channel in socket 20 (female channel 21A) form a straight line. In FIG. 1, this line is denoted by reference numeral C1.

In FIG. 1, at the end portion of the vehicle side plug 10 (lower end portion in the plane of FIG. 1), a pressure relief valve 30 is mounted. As shown in FIG. 1, the vehicle-side filling hose 61 is connected to the pressure relief valve 30 via the concave section 31F. The construction and operation of the pressure relief valve 30 will be explained in detail with reference to FIG. 8-10. However, the pressure release valve 30 may be omitted, in which case the vehicle side filling hose 61 is directly connected to the plug 10.

At the end section of the filling hose 61, opposite the side of the plug 10, a filling spout, not shown in the drawing, is mounted. As described above, the socket 20 is connected to the side of the hydrogen charging device, and the safety disconnect 100 is installed adjacent to the hydrogen charging device and the main portion of the charging hose 61.

In the direction in which the filling hose 61 extends (lower side in the plane of FIG. 1), a hose guide 70 is located at a position away from the plug 10 to limit the movement (swing) of the filling hose 61. In FIG. 1, the hose guide 70 has an outer cylinder 71, a resilient member 72 for enclosing the charging hose 61, a resilient member receiving portion 73 for receiving the resilient member 72 in a cavity, and a cap 74 for closing the cavity of the resilient member receiving portion 73. The outer cylinder 71 accommodates the resilient member 72, the resilient member portion 73 and the cover 74 (elements forming the hose guide 70), and the outer cylinder 71 is attached through the main member 80 to a hydrogen charging device, not shown. In this case, the inner diameter φ1 of the outer cylinder 71 is slightly larger than the maximum diameter D1 of the plug 10.

In FIG. 1, the columnar resilient member 72 has a hole (small diameter portion) with an inner diameter φ at the center portion in the radial direction, a filling hose 61 is inserted into the hole, and an elastic material such as rubber is selected as the material of the resilient member 72. The inner diameter φ of the small diameter portion (when the resilient member 72 is placed in the accommodating portion 73) is slightly larger than the outer diameter of the charging hose 61, so that the resilient member 72 wraps around the charging hose 61 when tightened to support it. Although not shown in the drawings, a cut is made in the radial direction of the elastic element 72 (indicated in Fig. 7 by the reference position 72AB), and the opening of the elastic element 72 due to the cut allows the elastic element 72 to be located, covering (wrapping around) the filling hose 61.

In FIG. 1, the cylindrical resilient member accommodating portion 73 has a resilient member accommodating cavity 72, and a support portion 73H for supporting the resilient member 72 in the vertical direction in the plane of FIG. 1. The end portion of the inner circumferential surface of the fuse disconnect side resilient accommodating portion 73 (upper side in the plane of Fig. 1) protrudes radially inward, a nut 73F is formed on the inner circumference in the radial direction of the protruding portion, and the nut 73F engages with the bolt 74M outer peripheral surface of the lid 74. In addition, the maximum outer diameter of the section 73 for receiving the elastic element is less than the inner diameter φ1 of the outer cylinder 71. The lid 74 is made in the form of a hollow cylinder (the cross section of the lid is annular) containing a cavity 74S, and on the outer peripheral surface of the lid formed bolt 74M. In FIG. 2, reference numerals 76 and 77 designate thrust washers.

As described above, the outer cylinder 71 of the hose guide 70 is attached to the hydrogen charging device through the main member 80. When the charging hose 61 is connected to the safety disconnect 100, the charging hose 61 passes through the outer cylinder 71, the resilient member portion 73, the thrust washers 76, 77, the cavity of the cover 74 of the hose guide 70, and the end portion of the charging hose 61 of the side of the fuse disconnector 100 is connected to the pressure relief valve 30. If the pressure relief valve 30 is not present, the end section of the charging hose 61 is directly connected to the plug 10. Further, the elastic element 72 is located between the thrust washers 76, 77, while the elastic element 72 is open on the side of the cut surface, and the elastic element 72 is located in such a way that to encircle the filling hose 61.

Further, the resilient member 72, the resilient member receiving portion 73, the cap 74 and the thrust washers 76, 77 forming the hose guide 70 are housed in the outer cylinder 71, the bolt 74M of the cap 74 is screwed into the nut 73F of the resilient member receiving portion 73, and the cap 74 is rotated in the compression direction of the resilient member 72. The compressive force generated by the cap 74 allows the repulsive elastic force of the resilient member 72 to act as a compression force of the charging hose 61. And the resilient member 72 is placed and fixed in the resilient member portion 73. In addition, after the elastic element 72 is placed in the section 73 for receiving the elastic element, and the section for accommodating the elastic element 73, thrust washers 76, 77 and the cover 74 are placed in the outer cylinder 71, the charging hose 61 can be connected to the end side section of fuse disconnector 100.

In FIG. 1 illustrating the state in which the plug 10 and the socket 20 are connected to each other, the charging hose 61 is connected to the side of the plug 10 and extends through the hose guide 70 toward the vehicle. In such a state as described above, the charging hose 61 is held or fixed by the elastic member 72, which is then compressed. When the filling hose 61 oscillates, its vibrations are perfectly damped in the area supported by the elastic member 72 of the hose guide 70 and are not transmitted to the plug 10 side of the fuse disconnector 100. Thus, the vibrations of the filling hose 61 do not act on the plug 10 of the fuse disconnector 100, and failure of the plug 10 or the pressure relief valve 30.

As described above, the inner diameter φ1 of the outer cylinder 71 of the hose guide 70 is larger than the maximum outer diameter D1 of the plug 10 of the fuse disconnector 100. In addition, the maximum outer diameter of the section 73 for receiving the elastic element of the hose guide 70 is slightly smaller than the inner diameter φ1 of the outer cylinder 71. For example, as shown in FIG. 2, when the vehicle is moving rapidly while it is being filled with hydrogen, and a tensile force (arrow F: FIG. 2) greater than or equal to a predetermined value is applied to the filling hose 61, the socket 20 and the plug 10 of the fuse disconnector 100 are separated from each other.

When plug 10 is separated from socket 20, as shown in FIG. 2, the charging hose 61, the plug 10 and the pressure relief valve 30 enter the region inside the outer cylinder 71 of the hose guide 70 in its radial direction, pass through the outer cylinder 71, and move towards the vehicle (lower side in the plane of FIG. 2). Then the elements located in the outer cylinder 71 of the hose guide 70 (resilient element 72, section 73 for accommodating the elastic element, cover 74 and thrust washers 76, 77) do not remain in the outer cylinder 71 of the hose guide 70 and move towards the vehicle from the outer cylinder 71 together with plug 10 and filling hose 61.

Thus, when a tensile force greater than or equal to a predetermined value is applied to the charging hose 61 to separate the plug 10 and the socket 20 from each other, the plug 10 will not be held by the hose guide 70, and the hydrogen charging device will not be pulled behind the vehicle, which prevents the hydrogen charging device from falling or failing. In other words, the hose guide 70 dampens the swing of the charging hose 61, does not transfer the moment due to the swing to the plug 10, and allows the plug 10 to pass through the outer cylinder 71 in its radial direction, and prevents a tensile force from being applied to the hydrogen charging device when the socket 20 and the plug 10 are separated from each other.

In the embodiment shown in the drawings, the pressure relief valve 30 may be configured to be located in the cavity 74S inside the cover 74 of the hose guide 70 in its radial direction. With this structure, when the plug 10 is separated from the socket 20, even if the pressure relief valve 30 collides with the cavity 74S of the cover 74, the impact resulting from the collision is absorbed by the elastic member 72. If the pressure relief valve 30 is not present, it is possible that the cover 74 receives the plug 10 into cavity 74S. In addition, it is possible that the cap 74 does not receive the pressure relief valve 30 and the plug 10 into the cavity 74S.

Plug 10 and socket 20 of fuse disconnector 100 are discussed below with reference to FIG. 3 and 4. However, the charging hose and hose guide 70 configuring the fuse disconnector 100 in FIG. 3 and 4 are not shown. In FIG. 3 and 4, the fuse disconnector 100 connects the socket 20 to the plug 10 (in the non-operating state) or disconnects the plug 10 and the socket 20 (when activated) by means of a mechanism 42 with a spring holder, on which the connecting balls 40 and the connecting spring 41 are mounted.

In the state where the plug 10 and the socket 20 are connected to each other, the ends of the socket side stem 22 and the plug side stem 2 (stem joint 11) contact each other to form a straight line and are pressed against each other. Thus, in FIG. 3, the stem 22 of the socket side is pressed by the stem 2 of the plug side and moves to the left, overcoming the elastic repulsive force of the spring 23 of the socket side. As a result, the seat side valve member 25 is separated from the seat side valve seat 27, opening the shutoff valve 24. On the other hand, in FIG. 3, the stem 2 of the side of the plug is pressed by the stem 22 of the side of the socket and moves to the right, overcoming the elastic repulsive force of the spring 4 of the side of the socket. As a result, the plug-side valve member 6 is separated from the plug-side valve seat 7, opening the shut-off valve 5. In a state where the socket 20 and the plug 10 are connected to each other as shown in FIG. 3, hydrogen gas supplied from the side of the not-shown hydrogen charging device passes through the female port 21A and the female port 1A, and is supplied through the not-shown charging hose installed on the side of the plug 10 to the vehicle side. The female channel 21A and the female port 1A are configured to have the same axes as the axis of the female side stem 22 and the male side stem 2 axis, respectively, and the axes of the female port 21A and the female port 1A form a straight line.

When an excessive tensile force greater than or equal to a predetermined value is applied to the charging hose due to the vehicle starting to move during hydrogen refueling, the socket 20 and the plug 10 are separated from each other (when actuated) due to a mechanism including connecting balls 40 and connecting spring 41 as shown in FIG. 4. After actuation, as shown in FIG. 4, the socket 20 and the plug 10 are separated from each other, the shaft 22 of the socket and the shaft 2 of the side of the plug are not pressed against each other. Thus, in FIG. 4, the socket stem 22 moves to the right under the elastic repulsive force of the socket side spring 23, the socket side valve 25 is seated in the socket side valve seat 27, the shut-off valve 24 is closed, and the inside passage 21A is closed. On the other hand, in FIG. 4, the plug-side stem 2 moves to the left under the elastic repulsive force of the plug-side spring 4, the plug-side valve member 6 sits in the plug-side valve seat 7, the shut-off valve 5 is closed, and the plug-in port 1A is closed. As a result, provided that the socket 20 and the plug 10 are separated from each other (after actuation), high pressure hydrogen gas is prevented from being released through the socket 20 or the plug 10.

In the shown in FIG. 3 and 4 of the fuse disconnector 100 for emergency disconnection of the stem part 22 of the socket side and stem 2 of the plug side are located in the female channel 21A or in the female channel 1A, respectively. Therefore, in order to prevent leakage of hydrogen gas, a sealing member 28 (for example, an O-ring) is installed on the socket-side stem connecting end side, and a sealing member 8 (for example, an O-ring) on the plug-side stem connecting end side. With the sealing members 28, 8, when high-pressure hydrogen gas charging occurs, even at the point where the ends of the socket side stem 22 and the plug side stem 2 contact each other (stem joint 11), atmospheric pressure is maintained.

Here, in order to prevent hydrogen gas from flowing around the other end 22A of the socket side stem 22A and the other end of the stem 2A of the plug side, and pressurizing at this point when charging high pressure hydrogen gas, a sealing member 29 of the other end 22A of the socket side stem (for example, an O-ring) and a sealing member 29 are provided. element 9 of the other end of the stem 2A of the plug side (eg O-ring). If the sealing elements 29, 9 are not installed, in order to increase the pressures at the other ends 22A and 2A, the forces with which the stem end 22 of the socket side and the end of the stem 2 of the plug side are pressed against each other are increased to exceed the set value of the emergency disconnect switch 100 , and socket 20 and plug 10 are separated from each other.

Next, with reference to FIG. 5-7 show a different version of the hose guide from the hose guide 70 shown in FIG. 1 and 2. The hose guide 70 shown in FIG. 1 and 2 dampens the swing of the filling hose 61 to prevent the plug 10 of the fuse disconnector 100 from being subjected to the swinging moment. hose, so that the hydrogen charging device is prevented from falling. In addition, the hose guide generally indicated in FIG. 5-7 at 70A has a function of preventing rotation of the hose portion of the fuse disconnector 100 side starting from the hose guide 70A when the charging hose 61 is twisted (FIGS. 1 and 2).

The hose guide 70A has an outer cylinder 71A, a resilient member 72A enclosing the charging hose 61, a resilient member receiving portion 73A in whose cavity the resilient member 72A is received, and a cover 74A for closing the cavity of the resilient member receiving portion 73A, and further includes outer cylinder attachment portion 75 and a nut 78 for compressing the outer cylinder attachment portion 75 in a downward direction in the plane of FIG. 6. In FIG. 6, an outer cylinder 71A with a cylindrical cavity receives a resilient member 72A, a resilient member portion 73A, and a cover 74A. At the lower end of the outer cylinder 71A, a flange 71AA is formed to extend radially outward along the entire circumference. In addition, on the outer circumferential surface of the outer cylinder 71A, from its upper end portion substantially to its lower end portion, a bolt 71AF screwed into the nut 78 is formed.

As in the description with reference to FIG. 1 and 2, the resilient member accommodating portion 73A has a resilient member accommodating cavity 72A, a support portion 73AH for supporting the resilient member 72A in the vertical direction (FIG. 6), and a nut 73AF on the inner peripheral surface. However, at the lower end portion (see FIG. 6) of the elastic member receiving portion 73A, a protrusion 73AT protruding radially outward is formed. The protrusion 73AT may be formed at one location in the radial direction, but a plurality of protrusions 73AT may be formed at multiple locations.

The outer cylinder mounting portion 75 is located on the outer periphery of the lower end of the outer cylinder 71A, a groove 75A is formed on the inner peripheral surface of the outer cylinder mounting portion 75, and the flange 71AA of the outer cylinder 71A can be provided in the groove 75A. In order to facilitate the insertion of the flange 71AA into the groove 75A while mounting the flange 71AA into the groove 75A, although not clearly shown in the drawings, it is preferable that the outer cylinder attachment portion 75 be radially divided or configured as a socket. On the inner circumferential surface of the outer cylinder attachment portion 75, a groove 75B is formed to receive the protrusion 73AT of the elastic member portion 73A, and the groove 75B extends in the longitudinal direction of the charging hose not shown, that is, in the vertical direction in the plane of FIG. 6 and opens at the lower end portion of the outer cylinder attachment portion 75 . Although not shown clearly in FIG. 5-7, the outer cylinder attachment portion 75 is attached to the hydrogen charging device in a known manner.

Resilient member 72A and cap 74A are similar to resilient member 72 and cap 74 shown in FIG. 1 and 2, respectively. Reference numeral 72AB in FIG. 7 shows a cut surface formed in the radial direction of the resilient member 72A, opening the cut surface 72AB allows the resilient member 72A to be positioned around the charging hose 61 or surrounding the charging hose 61. Although not clearly shown in FIG. 1 and 2 on the elastic member 72 shown in FIG. 1 and 2, the same cut surface as the cut surface 72AB is formed. In FIG. 6, reference numerals 76 and 77 designate thrust washers.

When the charging hose 61 is mounted on the fuse disconnector 100, the flange 71AA of the outer cylinder 71A is inserted into the groove 75A of the outer cylinder attachment portion 75; the nut 78 is screwed onto the bolt 71AF of the outer peripheral surface of the outer cylinder 71A; the outer cylinder attachment portion 75 is clamped between the nut 78 and the flange 71AA of the outer cylinder 71A; and the outer cylinder 71A is attached to the outer cylinder attachment portion 75 . The outer cylinder attachment portion 75 to which the outer cylinder 71A is attached is mounted on the hydrogen charging device, for example, through a main member not shown in the drawings. In such a case, the charging hose 61 passes through the resilient member portion 73A, the thrust washers 76, 77, the cap 74A, the outer cylinder 71A, the outer cylinder mounting portion 75, the nut cavity 78, and the end portion of the charging hose 61 of the side of the fuse disconnector 100 is connected to valve 30 pressure relief. However, if the pressure relief valve 30 is not present, then the end section of the charging hose 61 of the side of the fuse disconnector 100 is connected to the plug 10.

Then, the resilient member 72A is opened from the side of the cut surface 72AB to embrace the charging hose 61. And the cover 74A, thrust washer 76, resilient member 72A, thrust washer 77, resilient member receiving portion 73A are placed in the cavity of the outer cylinder 71A. When the resilient member receiving portion 73A is placed, the position of the protrusion 73AT in the circumferential direction is aligned with the position of the groove 75B of the outer cylinder attaching portion 75 in the circumferential direction, and the resilient member portion 73A is inserted into the groove 75B from its open bottom in the plane of FIG. 6 end. Then, the bolt 74AM of the cover 74A is screwed into the nut 73AF of the resilient member portion 73A, the cover 74A is rotated to compress the resilient member 72A vertically in the plane of FIG. 6 direction, and the elastic member 72A is fixed in the portion 73A to receive the elastic member.

In a hose guide 70A configured as shown in FIG. 5-7, the protrusion 73AT of the resilient member portion 73A and the groove 75B of the outer cylinder attachment portion 75 act as a key and a keyhole, respectively, so that the resilient member portion 73A can be moved in the vertical direction in the plane of FIG. 5 and 6, but cannot rotate relative to the outer cylinder attachment portion 75. Therefore, even if the charging hose 61 is twisted, rotation of the charging hose 61 is prevented by the protrusion 73AT of the resilient member portion 73A and the groove 75B in the outer cylinder attachment portion 75. Further, the twisting of the filling hose is extinguished and cut off at the location of the elastic member 72A. By this, even if the charging hose 61 is twisted, the twisting or force by which the charging hose 61 could be rotated is not transferred to the plug 10 side, and failure of the pressure relief valve 30 or the plug 10 due to the rotation of the charging hose 61 is prevented. and action of the hose guide 70A shown in FIG. 5-7 are similar in construction and operation to the hose guide 70 shown in FIG. 1 and 2.

Below with reference to FIG. 8-10, the pressure relief valve 30 is described. The pressure release valve 30 is connected to the plug 10 of the fuse disconnector 100 and has the function of releasing (releasing) high pressure hydrogen gas from the plug 10 of the vehicle side filling hose 61 when the plug 10 and the socket 20 are separated from each other. In addition, hydrogen gas is vented from the side port 20 of the hydrogen filling device by a non-shown pressure release mechanism. Meanwhile, the pressure relief valve 30 need not be installed when a gaseous fuel such as hydrogen gas is not used.

In FIG. 8, the pressure relief valve 30 has a substantially cuboid-shaped metal main body 31 and a pressure relief metal plug 32, the pressure relief plug 32 being configured to engage (screw in) with the pressure relief connection hole 31B of the main body 31. On a concave portion 31F is formed on the right side of the main body 31, and a vehicle-side charging hose 61 is connected to the concave portion 31F. Although not clearly shown, the end portion 31E on the left side of the main body 31 is connected to the plug 10 of the fuse disconnector 100. A hydrogen gas passage 31A is formed in the center of the main body 31 in the vertical direction, and the hydrogen gas passage 31A communicates through the end section 31E with an internal plug channel 1A on the side of the plug 10, and through a concave section 31F with a filling hose 61.

In FIG. 8, the pressure relief connection hole 31B communicating the upper surface 31G with the hydrogen gas passage 31A extends in the vertical direction, and the pressure relief connection hole 31B communicates with the discharge circuit 31C (FIGS. 9 and 10). The cross section of the discharge circuit 31C is chosen to be small, but sufficient to compensate for the pressure loss of the flowing hydrogen gas. As shown in FIG. 9B, the pressure relief plug 32 is inserted into the pressure relief connection hole 31B, and the engagement of the pressure relief plug 32 and the pressure relief connection hole 31B isolates the discharge circuit 31C from the hydrogen gas passage 31A.

The pressure release connecting hole 31B has a small diameter portion 31BA communicating with the hydrogen gas passage 31A, a cone portion 31BB, a first medium diameter portion 31BC, a second medium diameter portion 31BD, and a nut portion 31BE communicating with the upper surface 31G. On the other hand, the pressure relief plug 32 has a stem end portion 32A with a minimum diameter at the lower end, a stem taper portion 32B, a middle diameter portion 32C, a bolt portion 32D forming a bolt at the outer periphery. When the pressure relief plug 32 is inserted into the pressure relief connection hole 31B, the stem end portion 32A of the pressure relief plug 32 is inserted into the small diameter portion 31BA of the pressure relief connection hole 31B.

As shown in FIG. 8, the stem taper portion 32B of the pressure relief plug 32 and the taper portion 31BB of the pressure relief connection hole 31B are complementary to each other, and the stem taper portion 32B contacts the taper portion 31BB. Here, the pressure relief plug 32 and the main body 31 are made of metal, so that the portion where the stem cone portion 32B and the stem cone portion 31BB contact each other forms a so-called "metal seal". Between the middle diameter portion 32C of the pressure relief plug 32 and the second middle diameter portion 31BD of the pressure relief connection hole 31B, an O-ring 31H is provided, and the O-ring 31H prevents high-pressure hydrogen gas from leaking upward in the plane of FIG. 10 from the gap between the pressure relief plug 32 and the pressure relief connection hole 31B when the pressure relief plug 32 is sufficiently raised above the pressure relief connection hole 31B (provided that the engagement between the pressure relief plug 32 and the main body 31 is broken: see Fig. Fig. 10). A nut portion 31BE is formed in the connection hole 31B to relieve pressure, and a bolt formed on the outer periphery of the bolt portion 32D is screwed into the nut portion 31BE. In addition, a hexagonal socket 32E (hexagonal plug socket) is formed on the top surface of the pressure relief plug 32, and a hexagonal wrench not shown in the drawing inserts the hexagonal socket 32E of the plug to rotate the pressure relief plug 32 when it is connected/disconnected from the connection hole 31B for pressure relief.

As shown in FIG. 9 and 10, in a region near the boundary between the cone portion 31BB and the first medium diameter portion 31BC, the pressure relief connecting hole 31B communicates with the relief circuit 31C. As shown in FIG. 8 and 9, provided that the pressure relief plug 32 is screwed into the pressure relief connection hole 31B, the stem cone 32B and the pressure relief connection hole 31B taper 31B contact each other, and the hydrogen gas flowing through the passage 31A for hydrogen gas, completely isolated by a metal seal and does not enter the unloading circuit 31C. On the other hand, when the plug 10 and the socket 20 are separated from each other, and the pressure relief plug 32 is rotated in the pressure relief direction, for example, with a hexagon wrench, the nut portion 31BE of the pressure relief connection hole 31B and the bolt portion 32D of the pressure relief plug 32 come out out of engagement, the stem taper portion 32B and the taper portion 31BB of the pressure relief connection hole 31B are separated from each other, and the metal seal is loosened.

The state in which the metal seal is loosened is shown in FIG. 10. The diameter d1 of the stem end portion 32A is smaller than the inner diameter d2 of the small diameter portion 31BA of the pressure relief connection hole 31B (d1<d2), between the outer periphery of the stem end portion 32A and the inner periphery of the small diameter portion 31BA of the pressure relief connection hole 31B an annular gap is formed, the cross-sectional area of which is (π/4) (d22-d12). When the shown in FIG. 10, the high pressure hydrogen gas filling the hydrogen gas passage 31A flows through the annular gap (acting as an orifice) into the discharge circuit 31C and passes through the discharge circuit 31C to flow out from the pressure release valve 30 as shown by arrow O. At that At the same time, the hydrogen gas pressure is reduced when the hydrogen gas passes through the annular gap and the discharge circuit 31C, so that hydrogen gas is prevented from suddenly flowing out of the discharge circuit 31C. Also, movement of the filling hose 61 is prevented. In this case, the hydrogen gas outlet from the discharge circuit 31C is arranged at a location remote from the plug hexagon socket 32E (above the pressure relief plug 32). Then, even if sparks occur upon contact between the hexagonal wrench and the hexagon socket 32E of the plug, when inserting the hexagonal wrench into the hexagonal socket 32E of the plug to rotate the plug, the possibility of spark ignition of hydrogen gas becomes extremely low, and therefore safety is improved.

As shown in FIG. 8-10, for example, in Fig. 9, as long as the pressure relief plug 32 is tightened in the pressure relief connection hole 31B, the length L of the stem end portion 32A (vertical length in the plane of FIG. 9) and the length HL of the small diameter portion 31BA of the pressure relief connection hole 31B are relatively long. , and the length LW of the stem end portion 32A inserted into the small diameter portion 31BA of the pressure relief connection hole 31B is also relatively large. Thus, even if the hex wrench inserted into the hex socket 32E of the plug is over-turned, the stem end portion 32A will not be completely separated from the small diameter portion 31BA of the pressure relief connecting hole 31B, conditions for hydrogen gas to pass through the annulus between the portion 31BA of small diameter and the stem end portion 32A (cross-sectional area equal to (π/4)(d22-d12)), is maintained, and the pressure of hydrogen gas can be reduced due to pressure loss.

Although not shown in the drawings, in the pressure relief valve 30, the length L of the end portion (stem end portion 32A) of the hydrogen passage side pressure relief plug 32 may be shorter, an insertion hole may be formed on the upper surface 31G of the main body 31 lock pin, a lock pin can be inserted into the lock pin insertion hole to prevent rotation of the hex wrench.

Since the embodiment shown in the drawings is only an example, it does not limit the technical scope of the present invention.

Reference numerals

1 - Plug main body

1A - Intra-plug channel

2 - Plug side stem

10 - Plug

20 - Nest

21A - Intra-nesting channel

30 - Pressure relief valve

31 - Main body part

31A - Channel for hydrogen gas

31B - Pressure relief port

31BA - Small diameter area

31BB - Cone section

31C - Unloading circuit

32 - Pressure relief plug

32A - Stem end

32B - Stem taper

61 - Filling hose

70, 70A - Hose guides

71, 71A - Outer cylinders

72, 72A - Elastic elements

73, 73A - Areas for the placement of elastic elements

73AT - Overhang

74, 74A - Caps

75 - Attachment site of the outer cylinder

75A, 75B - Grooves

100 - Safety disconnect

Claims (3)

1. A fuse disconnector comprising a cylindrical plug in which a channel is made, a socket in which a channel is made, which is a continuation of the channel in the plug, and a shut-off valve installed in the socket channel, and the shut-off valve opens when the plug is inserted into the socket, and closes when the plug is disconnected from the socket, in which the center axes of the channels of the plug and the socket form a straight line, the charging hose is connected to the plug, and the hose guide for limiting the movement of the charging hose is in a position separated from the plug, while the hose guide includes an outer cylinder , an elastic element enclosing the filling hose, a section for accommodating the elastic element, in the cavity of which the elastic element is placed, and a cover in contact with the area for accommodating the elastic element to close the cavity, and the inner diameter of the outer cylinder is greater than the maximum diameter of the plug. 2. The disconnector according to claim 1, wherein the outer cylinder is attached by means of the outer cylinder attachment portion, a protrusion is formed at the end portion of the portion for accommodating the elastic element of the hose guide, protruding outward in the radial direction of the hose guide, and on the inner peripheral surface of the outer cylinder attachment portion a groove is made to receive the protrusion. 3. The disconnector according to claim 1, wherein either the plug or the socket includes a pressure relief valve having a main body made of metal, a pressure relief connection port communicating with a fuel passage in the main body, a pressure relief plug, made of metal, capable of being inserted into the pressure relief connection hole, and cone portions formed in the pressure relief connection hole and on the pressure relief plug, respectively, wherein the cone portions have complementary shapes to each other.

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