JP4949705B2 - Emergency disconnection connection device - Google Patents

Description

  The present invention relates to an emergency disconnection connecting device that protects a fluid supply line from an abnormal load (tensile force).

Examples of the fluid supply path include a fuel supply pipe that connects a fuel storage device and a fuel supply device of an automobile that uses gasoline, light oil, propane gas, hydrogen, or natural gas as fuel, a fuel transport lorry, a tank car, and a fuel storage. There are a supply pipe for connecting the apparatus to send fuel, a gas supply pipe for connecting an LNG storage tank of an LNG (liquefied natural gas) carrier ship anchored on the quay and an LNG storage facility on land.
An abnormal load may be sometimes applied to such a fluid supply path. For example, if the vehicle is accidentally started with the fuel supply pipe connected, or if the position of the LNG carrier fluctuates due to the influence of waves after connecting the gas supply pipe, the fluid supply path A great amount of tensile force acts on the. When an abnormal load is applied to the fluid supply path in this way, the fluid supply path may be damaged and fluid may leak out to the surroundings.
The emergency disconnection connection device is for protecting the fluid supply line from such an abnormal load.

The emergency detachment connection device includes a first coupling provided in an upstream pipeline among fluid supply pipelines, and a second coupling provided in a downstream pipeline and connected to the first coupling. Have. The first coupling and the second coupling are configured to allow fluid to flow between the upstream pipe line and the downstream pipe line in a state where the first coupling and the second coupling are connected to each other.
Even if the first coupling and the second coupling are connected to each other, the connection between the first coupling and the second coupling is released when a tensile force exceeding the range assumed in normal use is applied. It is configured. Thereby, when an abnormal load is applied to the fluid supply pipeline, the upstream pipeline and the downstream pipeline are disconnected, and damage to the fluid supply pipeline is prevented.
Further, the first coupling and the second coupling are provided with a valve device that seals the pipe line in which the first coupling and the second coupling are separated from each other. Thereby, even if a 1st coupling and a 2nd coupling isolate | separate as mentioned above, the leakage of the fluid from a fluid supply pipe line is prevented.

As such an emergency disconnection connection device, for example, an emergency disconnection coupler described in Patent Document 1 described below is known.
Patent Document 1 describes an emergency disconnecting coupler having a configuration in which a measuring instrument side coupling (first coupling) and an automobile side coupling (second coupling) are coupled by a cutting pin. The cutting pin is inserted over the insertion hole provided in the measuring instrument side coupling and the insertion hole provided in the automobile side coupling, thereby positioning the measuring instrument side coupling and the automobile side coupling. It is combined in the state.
In this emergency release coupler, the cutting pin breaks when an external force (tensile force) in the separation direction of a certain level or more is applied between the meter-side coupling and the automobile-side coupling, thereby breaking the meter-side coupling. And the vehicle side coupling can be separated.

JP 2006-17196 A (Claim 3, paragraphs [0046] to [0048] and FIGS. 2 to 4)

  However, if this emergency detachment coupler is used for a long time, the tensile force is repeatedly applied between the measuring instrument side coupling and the automobile side coupling, resulting in plastic deformation and fatigue in the cutting pin, which reduces the strength of the cutting pin. To do. For this reason, in an emergency detachable coupler used for a long period of time, the cutting pin breaks even if the tensile force acting between the meter side coupling and the automobile side coupling is smaller than the load resistance of the original cutting pin, There is a possibility that the measuring instrument side coupling and the automobile side coupling are separated.

  In addition, the measuring instrument side coupling and the automobile side coupling are connected not only to one place but also to a plurality of places by cutting pins so that no wobbling occurs between the measuring instrument side coupling and the automobile side coupling. It is preferable. However, due to the dimensional tolerances of the cutting pin, the measuring instrument side coupling and the automobile side coupling, the size of the play formed between the cutting pin, the measuring instrument side coupling and the automobile side coupling varies depending on the connection part. . For this reason, when a tensile force is applied between the measuring instrument side coupling and the automobile side coupling, the tensile force is received only by the cutting pin with a small amount of play, and the cutting pin with a large amount of play has a tensile force. May not join. As described above, when a plurality of cutting pins are provided, it is not always possible to receive a tensile force with all the cutting pins. Therefore, the connection strength between the measuring instrument side coupling and the automobile side coupling is accurately determined. It was difficult to set.

  The present invention has been made in view of such circumstances, and the emergency disconnection in which the connection strength between the first coupling and the second coupling is stable and the connection strength can be set accurately. An object is to provide a connection device.

In order to solve the above problems, the present invention employs the following means.
That is, the present invention is provided between the upstream flow channel and the downstream flow channel among the fluid supply pipelines connecting the fluid supply device and the supply target, and the upstream flow channel and the downstream flow channel. An emergency disconnection and connection device for connecting a road in a communicating state, wherein the first coupling is provided in one of the upstream channel and the downstream channel, and the upstream side A second coupling provided in the other of the flow path and the downstream flow path and connected to the first coupling, and the first coupling and the second coupling are coupled. And the first coupling has a first valve device that closes the one flow path in a state where the connection with the second coupling is released, and the second cup The ring is disconnected from the first coupling. Has a second valve device for closing the other flow path, and the coupling device includes an engaged portion provided in one of the first coupling and the second coupling, It has one or more sets of engaging tools that are provided on the other of the first coupling and the second coupling and that engage with the engaged portion. A pair of engaging claws that are opposed to each other in a direction orthogonal to the connecting direction of the coupling and the second coupling and that are engaged with the engaged portion so that the engaging portions can be brought close to and separated from each other. And an urging member that urges the engaging claw in a direction in which the engaging portions approach each other, and either one of the engaging claw and the engaged portion includes the other A first inclined surface is provided, and the first inclined surface is formed between the engaging claw and the engaged portion. It has a shape that protrudes toward the other of the engagement claw and the engaged portion as it is separated from the engagement position in the connecting direction of the first coupling and the second coupling. When the tensile force is applied to the first coupling and the second coupling so as to separate each other, the engaged portion and the pair of engaging claws are formed on the first inclined surface. The engagement portion is pulled out from between the pair of engagement claws when the tensile force is larger than the holding force of the engagement portion by the engagement tool. Thus, there is provided an emergency disconnection connecting device in which the engagement between the engaged portion and the engaging tool is released .

In the emergency disconnection connection device configured as described above, the first coupling and the second coupling are connected by the coupling device, the connection state is maintained, and the coupling by the coupling device is released, so that the connection is established. The state is released.
Specifically, the first coupling and the second coupling are coupled by engaging the engaged portion and the engaging tool constituting the coupling device, and the engaged portion and the engaging tool are connected. By releasing the engagement, the coupling between the first coupling and the second coupling is released. Note that the coupling device may include only one set of the engaged portion and the engagement tool, or may include a plurality of sets.
Further, in a state where the connection between the first coupling and the second coupling is released, the upstream side flow path and the downstream side flow path are blocked by the first and second valve devices, and the fluid leaks from the fluid supply path. Is prevented.

The engaging tool has a pair of engaging claws that engage with the engaged portion. The pair of engaging claws are disposed to face each other in a direction substantially orthogonal to the connecting direction of the first coupling and the second coupling. The pair of engaging claws are provided so that the engaging portions can be brought close to and separated from each other. Here, each engaging claw may be provided so that the whole engaging claw can move in the direction which approaches and separates mutually, for example. Further, each engagement claw is provided so as to be swingable about a portion separated from the engagement portion as a fulcrum, and the engagement portions can be moved closer to and away from each other by swinging around the fulcrum. Good.
The pair of engaging claws are urged by an urging member such as a coil spring, a leaf spring, or a torsion spring so that the engaging portions with the engaged portions are close to each other. That is, the engaging tool is configured to sandwich and hold the engaged portion from a direction substantially perpendicular to the connection direction of the first coupling and the second coupling by the pair of engaging claws biased by the biasing member. It is said that.
For this reason, when a tensile force is applied to the first coupling and the second coupling in a direction in which the first coupling and the second coupling are separated from each other, the tensile force is used to hold the engaged portion by the engagement tool (engagement tool). If the magnitude exceeds the clamping force), the engaged portion is pulled out from between the pair of engaging claws, and the engagement between the engaged portion and the engaging tool is released.

Thus, in this emergency detachment connecting apparatus, the tensile force applied in the direction in which the first coupling and the second coupling are separated is received by the clamping force of the engagement tool. That is, even if a tensile force is applied in a direction in which the first coupling and the second coupling are separated, no shearing force acts on the engagement tool.
As a result, even when a tensile force is repeatedly applied to the first coupling and the second coupling, the engagement tool is less likely to suffer strength reduction or plastic deformation due to fatigue, and the connection between the first coupling and the second coupling. The strength is stable.
Further, as described above, the engaging tool is configured to sandwich the engaged portion between the pair of engaging claws. For this reason, even if there is a dimensional tolerance in the engaged portion or the engaging claw, both of the engaging claws are always engaged with the engaged portion, so that the connection strength is stable.

  Moreover, in this emergency disconnection connecting apparatus, as described above, the tensile force applied in the direction in which the first coupling and the second coupling are separated is the magnitude of the clamping force of the engaging tool (the biasing force of the biasing member). It depends on. For this reason, in this emergency detachment connection device, the connection strength of the first coupling and the second coupling can be accurately set by using a member having an appropriate urging force as the urging member for urging the engaging claw. Can do.

In this emergency disengagement connection device, the engaging claws that make a pair may be adjacently disposed along the outer surface of the first coupling or the second coupling.
When this configuration is adopted, the clamping force of the engaging claw (the biasing force of the biasing member) acts along the outer surface of the first coupling or the second coupling. In other words, the clamping force of the engaging claw does not act in the direction of sandwiching the first coupling or the second coupling.
For this reason, in this configuration, the strength required for the first coupling and the second coupling is small. Thereby, in this structure, the freedom degree of design of a 1st coupling and a 2nd coupling is high, and size reduction and weight reduction are easy.
In this configuration, the engaging claw sandwiches the engaged portion from both sides in the circumferential direction of the first coupling or the second coupling. For this reason, in a state where the engaging tool and the engaged portion are engaged, the engaging tool and the engaged portion are positioned in the circumferential direction of the first coupling or the second coupling. For this reason, when this structure is employ | adopted, the connection of a 1st coupling and a 2nd coupling is performed favorably.

In emergency withdrawal connection device this, the the engaged portion, the second inclined projecting toward the engaging member as it separates from the tip to the connection direction between the second coupling and the first coupling A surface may be provided.
In this emergency disconnection connecting device, an angle of the first inclined surface is larger than an angle of the second inclined surface with respect to an axis when the first coupling and the second coupling are connected. It may be set.

In this case, in a state where the engaging claw and the engaged portion are engaged, the other is received by the guide surface provided on one of the engaging claw and the engaged portion. . Thereby, engagement with an engaging claw and a to-be-engaged part is performed more reliably and stably.
Thus, in a state where the engaging claw and the engaged portion are engaged, the engaging claw is pressed against the engaged portion by the urging force of the urging member. For this reason, the side received by the guide surface among the engaging claw and the engaged portion is relatively moved along the guide surface and guided to the normal engagement position.

As a result, when the tensile force acting between the first coupling and the second coupling is insufficient to pull out the engaged portion from between the engaging claws, the first coupling and the second cup When the tensile force acting between the rings disappears, the engaging claw and the engaged portion are again guided to the normal engaging position.
As described above, in this emergency disconnection connecting apparatus, when the tensile force stops working, the original state is restored again, so that the load resistance performance does not change even when a repeated load is applied.
Here, the guide surface may be provided on both the front and rear sides in the connection direction of the first coupling and the second coupling from the normal engagement position, and the connection direction of the first coupling and the second coupling. It may be provided only on the rear side (separation direction side).

  According to the emergency disconnection connecting apparatus according to the present invention, the connection strength between the first coupling and the second coupling is stable, and the connection strength can be set accurately.

Embodiments of the present invention will be described below with reference to the drawings.
The emergency disconnection connection device according to the present invention includes, for example, a fuel supply pipe that connects a fuel storage device and a fuel supply device of an automobile that uses hydrogen or natural gas as fuel, and an LNG storage tank of an LNG carrier that is anchored on a quay. It is provided in the gas supply piping etc. which connect with a land-based LNG storage facility.
In this embodiment, as shown in FIG. 1, the emergency disconnection connecting apparatus 1 according to the present invention is connected to a liquid hydrogen supply stand 2 (fluid supply apparatus) and an automobile 3 (supply target) 4 (fluid) An example provided on the supply path) will be described.

The liquid hydrogen supply stand 2 includes a liquid hydrogen storage device 2a and a hydrogen gas recovery device 2b.
The automobile 3 includes a liquid hydrogen storage device 3a and a power source 3b that generates power using hydrogen supplied from the liquid hydrogen storage device 3a. As the power source 3b, for example, an internal combustion engine that takes out power by burning hydrogen, or a fuel cell type power device that generates electric power by directly reacting hydrogen and oxygen and drives a motor by this electric power is used.

The connecting line 4 has a liquid hydrogen supply path 6 that connects the liquid hydrogen storage device 2 a of the liquid hydrogen supply stand 2 and the liquid hydrogen storage device 3 a of the automobile 3. The liquid hydrogen supply path 6 is divided into an upstream flow path 6a located on the liquid hydrogen supply stand 2 side and a downstream flow path 6b located on the automobile 3 side.
Further, the connecting line 4 has a hydrogen gas recovery path 7 that connects the liquid hydrogen storage device 3 a of the automobile 3 and the hydrogen gas recovery device 2 b of the liquid hydrogen supply stand 2. The hydrogen gas recovery path 7 is divided into an upstream flow path 7a located on the automobile 3 side and a downstream flow path 7b located on the liquid hydrogen supply stand 2 side.

The emergency disconnection connecting apparatus 1 according to the present embodiment is interposed between the upstream flow paths 6a, 7a and the downstream flow paths 6b, 7b, and is connected to the upstream flow path 6a, the downstream flow path 6b, and the upstream side. The flow path 7a and the downstream flow path 7b are connected in a communicating state.
As shown in FIGS. 2 to 4, the emergency disconnection connecting device 1 includes a first coupling 11 in which an upstream flow path 6 a and a downstream flow path 7 b are connected independently and in parallel, a downstream flow path 6 b and an upstream flow path. It has the 2nd coupling 12 to which the side flow path 7a is connected independently and parallelly, and the coupling device 13 which couple | bonds the 1st coupling 11 and the 2nd coupling 12. FIG.

As shown in FIGS. 2 and 3, the first coupling 11 has a coupling body 11 a having a substantially cylindrical shape. Inside the coupling body 11a, a flow path that forms a part of the upstream flow path 6a and a flow path that forms a part of the downstream flow path 7b are provided along the axis. Hereinafter, in the coupling body 11a, the end on the side where the upstream flow path 6a and the downstream flow path 7b are connected is referred to as a flow path connection end, and the end on the side connected to the second coupling 12 is the coupling. Called the connection end.
In the coupling body 11a, the first valve device 16 closes the upstream flow path 6a and the downstream flow path 7b in the coupling body 11a when the connection with the second coupling 12 is released. Is provided.

As shown in FIGS. 2 and 4, the second coupling 12 has a coupling body 12 a having a substantially cylindrical shape. Inside the coupling body 12a, a flow path that forms a part of the downstream flow path 6b and a flow path that forms a part of the upstream flow path 7a are provided along the axis. Hereinafter, in the coupling body 12a, the end on the side where the downstream flow path 6b and the upstream flow path 7a are connected is referred to as a flow path connection end, and the end on the side connected to the first coupling 11 is the coupling. Called the connection end.
Further, in the coupling body 12a, the second valve device 17 that closes the downstream flow path 6b and the upstream flow path 7a in the coupling body 12a in a state where the connection with the first coupling 11 is released. Is provided.

Hereinafter, a detailed configuration of the coupling device 13 will be described.
As shown in FIGS. 1 and 2, the coupling device 13 includes an engaged portion 21 provided in one of the first coupling 11 and the second coupling 12, the first coupling 11, and the first coupling 11. One or more sets of engaging tools 22 that are provided on the other of the two couplings 12 and engage with the engaged portion 21 are provided. In the present embodiment, as shown in FIG. 2, the engaged portion 21 is provided in the second coupling 12, and the engaging tool 22 is provided in the first coupling 11.
As shown in FIG. 1, two sets of the engaged portion 21 and the engaging tool 22 are provided on the outer peripheral surfaces of the first coupling 11 and the second coupling 12. The sets of the engaged portion 21 and the engaging tool 22 are provided on the opposite sides across the axes of the first coupling 11 and the second coupling 12.

As shown in FIGS. 2 and 3, the engaged portion 21 is configured by a substantially quadrangular protrusion in a cross-sectional view provided to protrude from the outer peripheral surface of the coupling body 12 a of the second coupling 12. In the engaged portion 21, a wall surface facing the circumferential direction of the coupling body 12 a is a receiving surface 21 a that receives an engaging claw 23, which will be described later, of the engaging tool 22.
In the engaged portion 21, a protrusion 21b protruding in the circumferential direction of the coupling body 12a is provided at the end of the coupling body 12a on the coupling connection end side. In the present embodiment, the protrusion 21b is formed in a substantially mountain shape having a flow channel side inclined surface F1 facing the flow channel connection end side and a connection end side inclined surface F2 facing the coupling connection end side.
The flow path side inclined surface F1 is directed in the circumferential direction of the coupling body 12a (that is, the direction of engagement with the engaging claw 23) as it is separated from the receiving surface 21a in the connecting direction of the first coupling 11 and the second coupling 12. It has a protruding shape. Thereby, the flow path side inclined surface F1 functions as a guide surface that receives the engaging portion 23a of the engaging claw 23 and guides it to the receiving surface 21a. Further, the flow path side inclined surface F1 is set such that the angle with respect to the axis of the coupling body 12a (in other words, the rising angle from the receiving surface 21a) is larger than the angle of the connection end side inclined surface F2 with respect to the axis of the coupling body 12a. ing.

The engaging tool 22 is opposed to the direction orthogonal to the connecting direction of the first coupling 11 and the second coupling 12, and at least the engaging portions 23a with the engaged portions 21 can be brought close to and separated from each other. It has a pair of provided engaging claws 23 and an urging member 24 that urges the engaging claws 23 in a direction in which the respective engaging portions 23a approach each other.
The pair of engaging claws 23 are adjacently disposed along the outer peripheral surface of the coupling body 11 a of the first coupling 11.
Each engaging claw 23 is pin-coupled with a pin P at a portion separated from the engaging portion 23a with respect to the coupling body 11a. Thereby, each engaging claw 23 can swing the engaging portion 23a in the tangential direction of the outer peripheral surface of the coupling body 11a with the pin P as a fulcrum. Further, each engaging claw 23 is provided with a recess 23b for receiving the protrusion 21b of the engaged portion 21 on the swing center side (that is, the connecting portion side with the pin P) from the engaging portion 23a. It has been.

The urging member 24 includes a cylinder 24a having a substantially cylindrical shape with one end opened, a pressing pin 24b inserted into the opening end side of the cylinder 24a, and a pressing pin 24b provided in the cylinder 24a and protruding from the cylinder 24a. And a coil spring (not shown) for urging in the direction to be performed.
The cylinder 24a is attached to the coupling body 11a so as to be swingable with the closed end as a fulcrum. The pressing pin 24b is pin-coupled to the corresponding engaging claw 23 at the protruding end from the cylinder 24a. Accordingly, the engaging claws 23 connected to the biasing member 24 are pressed and biased toward the pair of engaging claws 23.

Hereinafter, the connection structure between the first coupling 11 and the second coupling 12 and the detailed configurations of the first valve device 16 and the second valve device 17 will be described.
First, the specific structures of the coupling body 11a of the first coupling 11 and the first valve device 16 will be described. As shown in FIG.4 and FIG.5, the two cylindrical parts 11b are provided in the protruding state in the coupling connection end side of the coupling main body 11a. One of these cylindrical portions 11b constitutes a portion on the coupling connection end side of the upstream flow path 6a. The other of the cylindrical portions 11b constitutes a portion on the coupling connection end side of the downstream channel 7b.
Moreover, the recessed part 11c surrounding the circumference | surroundings of each cylindrical part 11b is provided in the coupling connection end side of the coupling main body 11a. A cylindrical portion 12b, which will be described later, provided in the coupling body 12a of the second coupling 12 is inserted into the recess 11c.

A poppet valve 31 is provided as the first valve device 16 in the upstream flow path 6a in the coupling body 11a.
The poppet valve 31 has a valve body 32 installed in each flow path with the shaft portion 32a facing the coupling connection end and the umbrella portion 32b facing the flow path connection end, and the valve body 32 is closed. There is an urging member 33 (in this embodiment, a coil spring) that urges toward (that is, the coupling connection end side).

Here, the upstream flow path 6a is provided with an enlarged diameter portion W at a position away from the coupling connection end. The umbrella portion 32 b and the urging member 33 of the valve body 32 are accommodated in the enlarged diameter portion W.
The umbrella part 32b of the valve body 32 is pressed toward the terminal part of the enlarged diameter part W by the urging member 33, whereby the upstream flow path 6a is closed.
When the valve body 32 is pushed back against the urging force of the urging member 33, the umbrella portion 32 b is separated from the terminal end portion of the enlarged diameter portion W, so that the coupling connection end and the enlarged diameter portion W of the upstream channel 6 a Are communicated through the shaft portion 32a to allow fluid to flow between them (that is, the upstream flow path 6a is opened).

  Similarly, a poppet valve 31 is provided as the first valve device 16 also in the downstream flow path 7b in the coupling body 11a. The configuration and function of the poppet valve 31 are the same as those of the poppet valve 31 provided in the upstream flow path 6a in the coupling body 11a.

Next, a specific structure of the coupling body 12a of the second coupling 12 and the second valve device 17 will be described. As shown in FIGS. 3 and 6, two cylindrical portions 12b are provided in a protruding state on the coupling connection end side of the coupling body 12a. One of these cylindrical portions 12b constitutes a portion on the coupling connection end side of the downstream channel 6b. Moreover, the other of the cylindrical part 12b comprises the part by the side of the coupling connection end of the upstream flow path 7a.
Moreover, the front end side enlarged diameter part 12c is provided in the coupling connection end of each cylindrical part 12b. The cylindrical portion 11b of the first coupling 11 is inserted into the distal end side enlarged diameter portion 12c.

A poppet valve 31 is provided as the second valve device 17 in the downstream flow path 6b in the coupling body 12a.
The poppet valve 31 has a valve body 32 installed in each flow path with the shaft portion 32a facing the coupling connection end and the umbrella portion 32b facing the flow path connection end, and the valve body 32 is closed. There is an urging member 33 (in this embodiment, a coil spring) that urges toward (that is, the coupling connection end side).

Here, the downstream-side flow path 6b is provided with an enlarged diameter portion W at a position separated from the coupling connection end. The umbrella portion 32 b and the urging member 33 of the valve body 32 are accommodated in the enlarged diameter portion W.
The umbrella part 32b of the valve body 32 is pressed toward the terminal part of the enlarged diameter part W by the urging member 33, whereby the downstream flow path 6b is closed.
When the valve body 32 is pushed back against the urging force of the urging member 33, the umbrella portion is separated from the terminal end portion of the enlarged diameter portion W, so that the coupling connection end and the enlarged diameter portion W of the downstream channel 6 b are separated. Communicating through the shaft portion 32a allows fluid to flow between them (that is, the downstream channel 6b is opened).

  Similarly, a poppet valve 31 is provided as the second valve device 17 also in the upstream flow path 7a in the coupling body 12a. The configuration and function of the poppet valve 31 are the same as those of the poppet valve 31 provided in the downstream flow path 6b in the coupling body 12a.

Hereinafter, the operation of the emergency disconnection connection apparatus 1 configured as described above will be described.
The emergency disconnection connecting device 1 is normally used in a state where the first coupling 11 and the second coupling 12 are connected.
In this state, as shown in FIG. 7, the cylindrical portion 11 b of the first coupling 11 is inserted into the distal-side enlarged diameter portion 12 c of the second coupling 12, and the cylindrical portion 12 b of the second coupling 12 is The first coupling 11 is inserted into the recess 11 c. Thereby, the upstream flow path 6a and the downstream flow path 6b, and the upstream flow path 7a and the downstream flow path 7b are connected in an airtight and liquid tight manner. In FIG. 7, only the connection structure between the upstream flow path 6 a of the first coupling 11 and the downstream flow path 6 b of the second coupling 12 is shown for easy understanding.

In this state, the shaft body 32a of the valve body 32 of the first valve device 16 and the valve body 32 of the second valve device 17 are in contact with each other, respectively, against the urging force of the urging member 33. Is pushed back a predetermined distance.
As a result, the first valve device 16 and the second valve device 17 are opened, and the upstream flow path 6a and the downstream flow path 6b, and the upstream flow path 7a and the downstream flow path 7b are in communication with each other. .

Thus, in a state where the first coupling 11 and the second coupling 12 are connected, the liquid hydrogen supply path that connects the liquid hydrogen storage device 2a of the liquid hydrogen supply stand 2 to the liquid hydrogen storage device 3a of the automobile 3 6 and the hydrogen gas recovery passage 7 connecting the liquid hydrogen storage device 3a of the automobile 3 and the hydrogen gas recovery device 2b of the liquid hydrogen supply stand 2 are opened.
As a result, liquid hydrogen can be supplied from the liquid hydrogen supply stand 2 to the automobile 3, and the hydrogen gas vaporized in the liquid hydrogen storage device 3a of the automobile 3 can be recovered by the hydrogen gas recovery device 2b. Become.

Then, by increasing the internal pressure of the liquid hydrogen storage device 3a by supplying the liquid hydrogen to the liquid hydrogen storage device 3a while recovering the hydrogen gas from the liquid hydrogen storage device 3a of the automobile 3.
Thereby, since the supply resistance of liquid hydrogen to the liquid hydrogen storage device 3a is reduced, the supply of liquid hydrogen can be performed quickly.

Here, the first coupling 11 and the second coupling 12 are coupled by the coupling device 13 to maintain the connection state, and the coupling state is released by releasing the coupling by the coupling device 13. .
Specifically, the first coupling 11 and the second coupling 12 are coupled by engaging the engaged portion 21 and the engaging tool 22 constituting the coupling device 13, and the engaged portion 21. The coupling between the first coupling 11 and the second coupling 12 is released by releasing the engagement between the first coupling 11 and the engagement tool 22.
Further, in a state where the connection between the first coupling 11 and the second coupling 12 is released, the respective valve bodies 32 of the first and second valve devices 16 and 17 are separated. For this reason, each valve element 32 is moved to the closed position by the urging force of the urging member 33, whereby the upstream flow paths 6a and 7a and the downstream flow paths 6b and 7b are closed, and the connection pipe line Fluid leakage from 4 is prevented.

  The engaging tool 22 has a pair of engaging claws 23 that engage with the engaged portion 21. The pair of engaging claws 23 are arranged to face each other in a direction substantially orthogonal to the connecting direction of the first coupling 11 and the second coupling 12. The pair of engaging claws 23 are provided so that the engaging portions 23a can be brought close to and separated from each other.

The pair of engaging claws 23 are urged by the urging member 24 in a direction in which the engaging portions with the engaged portions 21 are close to each other. That is, the engaging tool 22 is engaged by the pair of engaging claws 23 urged by the urging member 24 from the direction substantially perpendicular to the connection direction of the first coupling 11 and the second coupling 12. Is sandwiched and held.
For this reason, when a tensile force is applied to the first coupling 11 and the second coupling 12 in the direction in which the first coupling 11 and the second coupling 12 are separated from each other, this tensile force is the holding force of the engaged portion 21 by the engagement tool 22. If the magnitude exceeds (clamping force of the engaging tool 22), the engaged portion 21 is pulled out from between the pair of engaging claws 23, and the engagement between the engaged portion 21 and the engaging tool 22 is increased. The match is released.

Here, the engaged portion 21 is provided with a connection end side inclined surface F2. For this reason, when connecting the 1st coupling 11 and the 2nd coupling 12, the engaging part 23a of the engaging claw 23 is first received by the connection end side inclined surface F2. And as the 1st coupling 11 and the 2nd coupling 12 approach, the engaging part 23a is guided to the boundary part of the connection end side inclined surface F2 and the flow path side inclined surface F1 by the connection end side inclined surface F2. The
That is, in the process of connecting the first coupling 11 and the second coupling 12, the pair of engaging claws 23 are pushed apart from each other against the urging force of the urging member 24. Thereby, the engaging claw 23 easily gets over the protruding portion 21b and reaches the receiving surface 21a.
In other words, in the emergency disconnection connecting device 1, the engagement between the engaged portion 21 and the engaging tool 22 is automatically performed only by connecting the first coupling 11 and the second coupling 12.

As described above, in the emergency detachment connection device 1, the tensile force applied in the direction in which the first coupling 11 and the second coupling 12 are separated is received by the clamping force of the engagement tool 22. That is, even if a tensile force is applied in the direction in which the first coupling 11 and the second coupling 12 are separated, no shear force acts on the engagement tool 22.
As a result, even when a tensile force is repeatedly applied to the first coupling 11 and the second coupling 12, the engagement tool 22 is less susceptible to strength reduction or plastic deformation due to fatigue, and the first coupling 11 and the second cup The connection strength with the ring 12 is stable.
In addition, the engaging tool 22 is configured to sandwich the engaged portion 21 between the pair of engaging claws 23 as described above. For this reason, even if there is a dimensional tolerance in the engaged portion 21 and the engaging claw 23, both of the engaging claws 23 are always engaged with the engaged portion 21, so that the connection strength is stable. .

  Moreover, in this emergency detachment connection device 1, as described above, the tensile force applied in the direction of separating the first coupling 11 and the second coupling 12 is the clamping force of the engagement tool 22 (the biasing member 24 is attached). It depends on the size of the power. For this reason, in this emergency detachment connection device 1, the connection strength of the first coupling 11 and the second coupling 12 is increased by using an urging member 24 having an appropriate urging force for urging the engaging claw 23. It can be set accurately.

In the emergency disconnection connecting device 1, the pair of engaging claws 23 are adjacently disposed along the outer peripheral surface of the first coupling 11.
For this reason, the clamping force of the engaging claw 23 (the urging force of the urging member 24) acts along the outer surfaces of the first coupling 11 and the second coupling 12. In other words, the clamping force of the engaging claw 23 does not act in the direction of sandwiching the first coupling 11 or the second coupling 12.
For this reason, in this emergency detachment connection device 1, the strength required for the first coupling 11 and the second coupling 12 can be reduced. Thereby, in this emergency detachment connection apparatus 1, the freedom degree of design of the 1st coupling 11 and the 2nd coupling 12 is high, and size reduction and weight reduction are easy.
Further, in the emergency detachment connection device 1, the engaging claw 23 sandwiches the engaged portion 21 from both sides in the circumferential direction of the second coupling 12. For this reason, in the state where the engaging tool 22 and the engaged part 21 are engaged, the engaging tool 22 and the engaged part 21 are positioned in the circumferential direction of the first coupling 11 and the second coupling 11. Is made. For this reason, when this structure is employ | adopted, the connection with the 1st coupling 11 and the 2nd coupling 12 is performed favorably.

As shown in FIG. 8, in this emergency detachment connecting device 1, the engaged portion 22 is provided with a flow channel side inclined surface F1 (guide surface) that receives the engaging claw 23, and this flow channel side inclined surface F1. However, the shape which protrudes toward the engagement nail | claw 23 is comprised as it separates in the connection direction of the 1st coupling 11 and the 2nd coupling 12 from the normal engagement position of the engagement nail | claw 23 and the to-be-engaged part 21. ing.
Thereby, in the state which the engaging claw 23 and the to-be-engaged part 21 are engaging, the other is received by the flow-path-side inclined surface F1. Thereby, engagement with the engaging claw 23 and the to-be-engaged part 21 is performed more reliably and stably.
Thus, in a state where the engaging claw 23 and the engaged portion 21 are engaged, the engaging claw 23 is pressed against the engaged portion 21 by the urging force of the urging member 24. Therefore, the side of the engaging claw 23 and the engaged portion 21 that is received by the flow channel side inclined surface F1 is relatively moved along the flow channel side inclined surface F1, and is guided to the normal engagement position. Is done.

As a result, if the tensile force acting between the first coupling 11 and the second coupling 12 is insufficient to pull out the engaged portion 21 from between the engaging claws 23, the first coupling When the tensile force acting between 11 and the second coupling 12 is lost, the engaging claw 23 and the engaged portion 21 are again guided to the normal engaging position.
Thus, in this emergency detachment connection device 1, since the original state is restored again when the tensile force is no longer applied, the load resistance performance does not change even when a repeated load is applied.
Thus, according to the emergency detachment connection device 1 according to the present embodiment, the connection strength between the first coupling 11 and the second coupling 12 is stable, and the connection strength can be set accurately. .

In the state where the first coupling 11 and the second coupling 12 are connected in this way, as shown in FIG. 2, the engaged portion 21 and the engaging tool 22 of the coupling device 13 are engaged, The one coupling 11 and the second coupling 12 are fixed in a coupled state.
Specifically, when the engaged portion 21 and the engaging tool 22 are engaged, each engaging claw 23 of the engaging tool 22 gets over the protruding portion 21 of the engaged portion 21 and receives the receiving surface. To 21a, the receiving surface 21a

Here, in the above-described embodiment, the engaging claw 23 provided swingably on the coupling body 11a as the engaging tool to be engaged with the engaged portion 21, and the bias using the coil spring Although the engagement tool 22 having the member 24 is used, the present invention is not limited to this, and an engagement tool having another configuration may be used.
For example, an engagement tool 42 shown in FIG. 9 may be used. The engagement portion 42 includes an engagement claw 43 having an engagement portion 23a and a recess 23b, and a plate having one end fixed to the coupling body 11a of the first coupling 11 and the engagement claw 43 attached to the other end. And an urging member 44 made of a spring.
Also in the engaging portion 42, the engaging portion 23 a of the engaging claw 43 is pressed against the receiving surface 21 a of the engaged portion 21 by the urging force of the urging member 44. As a result, the first coupling 11 and the second coupling 12 are coupled to each other, and when a predetermined tensile force is applied, the biasing member 44 is elastically deformed and the engagement claws 43 are separated. The engaged portion 21 is pulled out of the first coupling 11 and the coupling between the first coupling 11 and the second coupling 12 is released.

Moreover, you may use the engaging tool 52 shown in FIG. The engaging portion 52 includes an engaging claw 53 having an engaging portion 23a and a concave portion 23b, and a twist in which one end is fixed to the coupling body 11a of the first coupling 11 and the engaging claw 53 is attached to the other end. And an urging member 54 made of a spring.
Also in the engaging portion 52, the engaging portion 23 a of the engaging claw 53 is pressed against the receiving surface 21 a of the engaged portion 21 by the urging force of the urging member 54. As a result, the first coupling 11 and the second coupling 12 are coupled to each other, and when a predetermined tensile force is applied, the biasing member 54 is elastically deformed and the engagement claws 53 are separated. The engaged portion 21 is pulled out of the first coupling 11 and the coupling between the first coupling 11 and the second coupling 12 is released.

It is a figure which shows the usage type of the emergency detachment connection apparatus which concerns on one Embodiment of this invention. It is a top view which shows the structure of the emergency detachment connection apparatus which concerns on one Embodiment of this invention. It is a top view which shows the structure of the 2nd coupling of the emergency detachment connection apparatus which concerns on one Embodiment of this invention. It is a top view which shows the structure of the 1st coupling of the emergency detachment connection apparatus which concerns on one Embodiment of this invention. It is a longitudinal cross-sectional view of the 1st coupling shown in FIG. It is a longitudinal cross-sectional view of the 2nd coupling shown in FIG. It is a longitudinal cross-sectional view which shows the connection structure of the 1st coupling of the emergency detachment connection apparatus of this invention, and a 2nd coupling. It is a figure which shows operation | movement of the coupling device of the emergency detachment connection apparatus which concerns on one Embodiment of this invention. It is a figure which shows the other structural example of the coupling device of the emergency detachment connection apparatus which concerns on one Embodiment of this invention. It is a figure which shows the other structural example of the coupling device of the emergency detachment connection apparatus which concerns on one Embodiment of this invention.

Explanation of symbols

1 Emergency disconnection connection device 2 Liquid hydrogen supply stand (fluid supply device)
3 cars (supplied)
4 Connection pipeline (fluid supply pipeline)
6a, 7a Upstream flow paths 6b, 7b Downstream flow path 11 First coupling 12 Second coupling 13, 41, 51 Coupling device 16 First valve device 17 Second valve device 21 Engaged portions 22, 42, 52 Engaging tools 23, 43, 53 Engaging claws 24, 44, 54 Energizing member F1 Channel side inclined surface (guide surface)

Claims (4)

Of the fluid supply pipes connecting the fluid supply device and the supply target, the fluid supply pipes are interposed between the upstream flow path and the downstream flow path so as to communicate the upstream flow path and the downstream flow path. Emergency disconnection connection device,
A first coupling provided in any one of the upstream channel and the downstream channel;
A second coupling provided in the other channel of the upstream channel and the downstream channel and connected to the first coupling;
A coupling device for coupling the first coupling and the second coupling, wherein the first coupling is the one channel in a state where the connection with the second coupling is released. A first valve device for closing
The second coupling has a second valve device that closes the other channel in a state where the connection with the first coupling is released,
The coupling device is provided on an engaged portion provided on one of the first coupling and the second coupling, and on the other of the first coupling and the second coupling. And having one or more sets of engaging tools that engage with the engaged parts,
In the engaging tool, the engaging portions that face the direction orthogonal to the connecting direction of the first coupling and the second coupling, and the engaging portions that engage with the engaged portion can approach and separate from each other. A pair of engaging claws provided on
A biasing member that biases the engaging claw in a direction in which each of the engaging portions approaches ,
Either one of the engaging claw and the engaged portion is provided with a first inclined surface that receives the other,
As the first inclined surface moves away from the normal engagement position between the engagement claw and the engaged portion in the connecting direction of the first coupling and the second coupling, the engagement claw It has a shape protruding toward the other of the engaged parts,
When a tensile force is applied to the first coupling and the second coupling in a direction in which they are separated from each other, the engaged portion and the pair of engaging claws are along the first inclined surface. The engagement portion is pulled out from between the pair of engagement claws when the tensile force is larger than the holding force of the engagement portion by the engagement tool. An emergency detachment connection device in which the engagement between the engaged portion and the engagement tool is released .   The emergency disconnection connecting device according to claim 1, wherein the pair of engaging claws are arranged adjacent to each other along an outer surface of the first coupling or the second coupling. 2. The second engaged surface that protrudes toward the engaging tool as it is separated from the tip in the connecting direction of the first coupling and the second coupling. The emergency disconnection connection apparatus according to claim 1 or 2 . Relative to the first coupling and the second coupling and the axis at the time of connecting the said first angle of the inclined surface, the second inclined surface of claim is set to be larger than the angle 3 The emergency disconnect connection device described in 1.

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