JP2018062985A - Emergency disengagement device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an emergency disengagement device that has a valve structure driven by a simple link mechanism, can rapidly and automatically close an open end of a valve box in an emergency and exerts uniform sealing performance around the entire circumference of the open end.SOLUTION: An emergency disengagement device comprises valve boxes 2 accommodating valve structures 4, and a connector 14 for connecting the valve boxes 2 to each other. The valve structure 4 is comprised of a link mechanism 5 and a valve element 15 that is driven by the link mechanism 5 to open and close an open end 2a. The link mechanism 5 comprises first and second shaft bodies 6, 7, a first link bar 10 turning around the first shaft body 6 as a center, a second link bar 11 turning around the second shaft body 7 as a center, a valve holding body 12 that has the tip fixed to the valve element 15 and is connected to the first and second ling bars 10, 11 via third and fourth shaft bodies 8, 9, and an elastic body 13 rotating the first and second link bars 10, 11 in a direction in which the valve element 15 closes the open end 2a. The valve element 15 is provided with a projection 16.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an emergency release device including a valve body that closes open ends of a pair of conduits, and more particularly to an emergency release device that includes a link mechanism to drive the valve body.

Conventionally, when a fluid such as liquefied fuel is transferred between a land storage facility and a ship berthing using a conduit, an accident occurs that the ship suddenly moves due to high waves or strong winds and the conduit breaks. was there. As a countermeasure against such an emergency, an emergency is possible in which the open ends can be quickly closed and the open ends can be separated from each other by the valve structures provided at the open ends on the land side and the sea side of the conduit. Detachment devices have been installed.
However, since a ball valve or a globe valve has been adopted as the valve structure, there is a problem that the weight and the opening / closing torque are too large.
Therefore, in order to solve such problems, in recent years, a technology related to a valve structure that employs a leaf fly valve or a flap valve has been developed, and several inventions and devices have already been disclosed.

Patent Document 1 discloses a device related to a valve body actuating device for a gas flap valve under the name of “link-type hermetic damper”.
Hereinafter, the device disclosed in Patent Document 1 will be described. The device related to the link-type hermetic damper disclosed in Patent Document 1 includes a flap valve body having at least three bearing bases. A guide arm shorter than the swivel arm is hinged to the intermediate bearing stand, and the other end of the guide arm is fixed to the inner wall of the valve box via a bracket. It is characterized by.
In the link type sealing damper having such a feature, when the flap valve body is initially opened, the upper edge portion thereof moves in parallel along a direction orthogonal to the valve box seat surface. After that, the upper edge gradually moves while drawing an arc orbit with respect to the valve box seat surface.
Therefore, according to the present invention, uneven wear of the upper edge portion of the flap valve body and the seat surface of the valve box can be prevented.

Patent Document 2 discloses a device relating to a valve device provided with a connecting pipe such as a fluid handling device under the name of “valve device in an emergency disconnecting device”.
Hereinafter, the idea disclosed in Patent Document 2 will be described. In the device related to the valve device disclosed in Patent Document 2, an eccentric butterfly valve is provided between the first connection pipe and the second connection pipe in the first and second valve boxes fixed to the first and second connection pipes, respectively. The first lever is attached to the first operating shaft of the butterfly valve of the first valve box, and the second valve box is provided with a rotation lever. While the shaft is attached, the second operation shaft and the rotation shaft of the butterfly valve of the second valve box are connected by a reverse transmission mechanism, and an interlocking link is connected to the first lever and the second lever. It is characterized by.
In the valve device having such a feature, the first operating shaft is rotated to the second operating shaft via the first lever, the interlocking link, the second lever, the rotating shaft, and the reverse transmission mechanism. Communicated. At this time, since the reverse conducting mechanism rotates the second operation shaft in the direction opposite to the rotation shaft, each butterfly valve rotates in the opposite direction, and the first and second connection pipes are opened. Or closed. Of these, when the first and second connecting pipes are opened, each butterfly valve is stationary in parallel in the same plane, so there is no hindrance to the flow of cargo handling fluid, Cargo handling can be carried out smoothly.

Patent Document 3 discloses an invention related to a valve device having a good opening / closing operability under the name of “valve device”.
Hereinafter, the invention disclosed in Patent Document 3 will be described. The invention relating to the valve device disclosed in Patent Document 3 is a valve device having a valve seat provided in a fluid flow path and a valve element whose one end is pivotally supported by a fixed support shaft. And a second support provided on the back side opposite to the side that contacts and separates the valve seat of the first support shaft provided at one end of the control rod on the flow path side. And a connecting material for connecting the support shaft.
In the valve device having such a feature, when the valve element is rotated by moving the operation rod to the flow path side, the flow of the fluid starts to be throttled, and further, the valve element comes into contact with the opening surface of the valve seat. And adhere closely. At this time, since the first support shaft is located below the second support shaft, even when fluid pressure is applied in the direction from the second support shaft to the first support shaft, No force is generated to move the first spindle upward. Further, the position of the first support shaft is supported by the fixed support shaft via the connecting member and the valve element and does not move.
Thus, according to the valve device having the above characteristics, the surface pressure between the valve disc and the valve seat can be maintained by a simple link mechanism.

Microfilm of Japanese Utility Model No. 57-58009 (Japanese Utility Model Publication No. 58-161265) Japanese Utility Model Publication No. 4-14685 JP-A-8-247332

  However, in the device disclosed in Patent Document 1, when the flap valve body starts to open the valve seat surface, the upper edge portion is separated in a direction substantially perpendicular to the valve seat surface. In the case where the flap valve body closes the valve box seat surface, it is conceivable that the peripheral edge of the valve body uniformly contacts the valve box seat surface. Therefore, if the present invention is adopted as the valve structure of the emergency detachment device, it can be expected that uniform sealing performance can be obtained for the entire circumference of the open end when closing each open end of the conduit. However, in the present invention, since the control method of the drive shaft is unknown, it is difficult to immediately apply the present invention to an emergency detachment device that needs to automatically open and close the valve body.

  Next, in the invention disclosed in Patent Document 2, each butterfly valve rotates around the first and second operation shafts, respectively, immediately before closing the first and second connecting pipes. However, the periphery of each butterfly valve rotates in an arcuate path. Therefore, unlike the device according to Patent Document 1, it cannot be expected that uniform sealing performance can be obtained when each open end of the conduit is closed. Furthermore, in order to open and close the first and second connecting pipes, the angle at which each butterfly valve rotates needs to be 90 degrees. Thus, when the angle is changed by 90 degrees, it takes time to rotate, and it may be difficult to quickly close the first and second connection pipes in an emergency.

  Furthermore, in the invention disclosed in Patent Document 3, one end of the valve element is pivotally supported by the fixed support shaft so that the other end of the valve element is an arc track even immediately before closing the flow path. Draw and rotate. Furthermore, since the angle at which the valve rotates is 90 degrees, it is considered that there is a problem similar to the idea disclosed in Patent Document 2.

  The present invention has been made in response to such a conventional situation. By providing a valve structure driven by a simple link mechanism, the open end of the valve box is quickly and automatically closed in an emergency. An object of the present invention is to provide an emergency release device that can perform uniform sealing performance around the entire circumference of the open end when the open end of the valve box is closed.

  In order to achieve the above object, a first invention is provided with a valve box that is provided at each end of a pair of conduits and accommodates a valve structure therein, and a connector for connecting the valve boxes to each other. The structure consists of a link mechanism supported by the inner peripheral wall of the valve box, and a valve element that is driven by this link mechanism to open and close the open end of the valve box, and the link mechanism is fixed at both ends to the inner peripheral wall. The first and second shaft bodies and one end supported by the first shaft body, the first link bar rotating around the first shaft body, and the one end serving as the second shaft body A second link bar that is supported and pivots about the second shaft body, and a distal end is fixed to one end of the valve body, and a body portion connected to the distal end is connected to the other end of the first link bar and A valve holding connected to the other end of the second link bar via the third and fourth shafts in order from the tip. An elastic body attached to the first shaft body and biasing the first and second link bars so as to rotate the valve body in a direction to close the open end, and a pair of valve bodies Is characterized in that the other end is provided with a protrusion having contact ends that can contact each other.

  In the first invention having such a configuration, for example, a butterfly valve having an area capable of closing the open end of the valve box is used as the valve body. The link mechanism for driving the valve body to open and close the open end is roughly a first link bar that rotates around the first shaft body and a first link bar that rotates around the second shaft body. 2, and an elastic body that biases the second link bar so as to rotate the valve body in a direction to close the open end, so that the valve body is unidirectional in a side view. It always receives an urging force from the elastic body so as to rotate. Therefore, when the urging force is suppressed, the open end is opened, and the fluid can pass therethrough. More specifically, when the urging force is suppressed, a pair of valve boxes are connected to each other by a connector, and the contact ends of the protrusions provided on the other end of the valve body are in contact with each other, This is a case where the valve bodies are stationary with a space between each other.

  In the emergency detachment device having the above-described configuration, when the fluid passes through a pair of open ends that are opened, if the pair of conduits move greatly due to strong wind or the like, or if one of the conduits is strongly pulled, Immediately release the connection between the valve boxes using the connector. Thereby, since the valve boxes start to be separated from each other, the contact ends of the protrusions that are in contact with each other also start to separate. At the same time, since the suppression of the biasing force of the elastic body starts to be released, the valve body starts to rotate in the direction of closing the open end via the link mechanism. Since this rotation is continued as it is by the urging force of the elastic body, the pair of open ends are completely closed by the valve body, and the discharge of the fluid is stopped.

  Immediately after the valve body starts to rotate in the direction of closing the open end, the lower edge of the valve body in a side view performs a substantially arc motion. However, immediately before the valve body closes the open end, the lower edge of the valve body in a side view performs linear motion along a direction orthogonal to the diameter direction of the valve box.

Next, according to a second aspect, in the first aspect, the valve box has a convex portion formed at the opposite end to the open end, and the valve holder has a locking portion at the rear end thereof. The locking part is characterized in that it is locked to the convex part when the valve body rotates to the maximum in the direction of opening the open end.
In the second invention having such a configuration, “when the valve body rotates to the maximum in the direction of opening the open end” refers to a case where the connector connects the pair of valve boxes.
In the second invention of the above configuration, in addition to the action of the first invention, the locking portion is locked to the convex portion, so that, for example, the approach between the contact ends that have already contacted is suppressed, Excessive force is prevented from being applied.

Further, according to a third invention, in the first or second invention, the other end of the pair of valve bodies has an absolute value of 0 degrees with respect to the diameter direction of the valve box when the pair of valve boxes are viewed from the side. It is characterized by rotating symmetrically at an angle in the range of less than 90 degrees as described above.
In the third invention having such a configuration, when the other end of the valve body forms an absolute value of 0 degrees with respect to the diameter direction of the valve box, the pair of contact ends are separated from each other with a maximum interval. When the other ends of the pair of valve bodies face each other in parallel. That is, the pair of open ends are closed by the valve bodies. The case where the other end of the valve body is less than 90 degrees in absolute value with respect to the diameter direction of the valve box is when the pair of contact ends are in contact with each other, and the other end of the pair of valve bodies is parallel. This is a case where they are inclined and face each other symmetrically. That is, it is a case where a pair of open ends are each opened by the valve body.
In the third invention of the above configuration, in addition to the action of the first or second invention, the other ends of the pair of valve bodies face each other in parallel or inclined, so that the fluid can be stopped or passed, respectively. .

In a fourth aspect of the present invention, in any one of the first to third aspects, when the pair of contact ends rotate to the maximum in a direction in which the pair of valve bodies open the corresponding open ends, respectively, A contact surface capable of surface contact is formed.
In the fourth invention having such a configuration, in addition to the action of any one of the first to third inventions, the pair of contact surfaces are in surface contact with each other, whereby the other ends of the pair of valve bodies are paired with each other. The posture inclined to the maximum with respect to the diameter direction of the valve box is strongly maintained.

Subsequently, in a fifth invention according to any one of the first to fourth inventions, the elastic body includes a coil portion wound around the first shaft body, and first and second ends extending from both ends of the coil portion. A torsion spring comprising two arm portions, the first arm portion having a tip reaching near the second shaft body, and the second arm portion having a tip near the third shaft body or It reaches the vicinity of the fourth shaft body.
In the fifth invention having such a configuration, the position of the third shaft body with respect to the second shaft body by the first and second arm portions in addition to the action of any one of the first to fourth inventions. Alternatively, the position of the fourth shaft body with respect to the second shaft body is restricted. Further, since the third shaft body and the fourth shaft body are connected via the valve holder and are configured to always maintain the same interval, the position of the third shaft body with respect to the first shaft body, Alternatively, the position of the fourth shaft body with respect to the first shaft body is indirectly defined by the first and second arm portions, respectively. That is, the relative positional relationship between the first link bar and the second link bar is regulated by the torsion spring.

According to a sixth invention, in any one of the first to fifth inventions, the pair of open ends are each formed with a flange portion, and the connector is a clamp that clamps or releases the pair of flange portions. It is characterized by that.
In the sixth invention having such a configuration, in addition to the operation of any one of the first to fifth inventions, the clamping or releasing of the pair of flange portions is performed by controlling the clamping of the clamp with respect to this. The tightening control is performed using, for example, a hydraulic control means.

According to the first invention, the rotation of the valve body is started in the direction to close the open end by only one kind of operation of immediately releasing the connection between the valve boxes, and the open end is completely closed and the fluid is closed. Can be stopped. Therefore, the open end can be quickly and automatically closed in an emergency.
In addition, immediately before the valve body closes the open end, the lower edge of the valve body in side view performs a linear motion along a direction perpendicular to the diameter direction of the valve box, so the valve body is relative to the open end. It approaches by translational movement, and finally comes into contact with the entire circumference of the other end with equal pressure. Therefore, the sealing performance by the valve body can be made uniform over the entire circumference of the open end.
Further, the valve box constituting the present invention is composed of a link mechanism and a valve body, and the link mechanism is a simple structure composed of first and second link bars, an elastic body, etc. The emergency separation device according to the invention can be manufactured easily and inexpensively.

  According to the second invention, in addition to the effects of the first invention, when the valve body rotates to the maximum in the direction to open the open end, it is prevented that an excessive force is applied to the contact end. Damage to the protrusions can be prevented.

  According to the third invention, in addition to the effects of the first or second invention, the other ends of the pair of valve bodies can be controlled in parallel or inclined so that the passage of fluid can be controlled respectively. Compared with the case where the other end of the valve body is 90 degrees with respect to the diameter direction of the valve box to control the passage of the fluid, the time for completing the rotation can be shortened.

  According to the fourth invention, in addition to the effects of any one of the first to third inventions, since the pair of contact surfaces are in surface contact with each other, the posture in which the valve body is inclined is strongly held. It is possible to prevent the valve body from rotating unexpectedly when the open end is opened.

  According to the fifth invention, in addition to the effects of any one of the first to fourth inventions, the relative positional relationship between the first link bar and the second link bar is regulated by the torsion spring. Therefore, it is possible to embody a specific configuration for “urging the first and second link bars so that the valve body rotates in the direction of closing the open end” described in the first invention. It is. In addition, since the valve body closes the open end, it is not necessary to use an electric drive member, and the passage of fluid can be stopped with a simple configuration.

  According to the sixth invention, in addition to the effects of any one of the first to fifth inventions, the clamping release of the pair of flange portions is performed by controlling the clamping of the clamp. Both separation and opening end closing can be started.

It is side sectional drawing of the emergency detachment apparatus based on an Example. It is a block diagram of the link mechanism which comprises the emergency detachment apparatus which concerns on an Example. It is a perspective view of the link mechanism which comprises the emergency detachment apparatus based on an Example. It is a sectional side view which shows the effect | action of the emergency detachment apparatus based on an Example. It is a sectional side view which shows the effect | action of the emergency detachment apparatus based on an Example. It is a sectional side view which shows the effect | action of the emergency detachment apparatus based on an Example. It is a turning locus | trajectory figure which shows a locus | trajectory in case the valve body which comprises the emergency detachment apparatus which concerns on an Example rotates. (A) is a front view of the coupler which comprises the emergency detachment apparatus based on an Example, (b) is a block diagram of the control apparatus for controlling a coupler.

The emergency detachment apparatus of the Example which concerns on embodiment of this invention is demonstrated in detail using FIG. 1 thru | or FIG. FIG. 1 is a side sectional view of an emergency release device according to an embodiment.
As shown in FIG. 1, the emergency detachment device 1 according to the present embodiment is provided in the end portions 50 a of a pair of conduits 50, 50. The valve boxes 2 and 2 and a connector 14 for connecting the valve boxes 2 and 2 are provided.
The valve boxes 2 and 2 and the end portions 50a and 50a are firmly connected by fasteners 50b and 50b made of bolts and nuts, respectively.
The valve structures 4 and 4 are respectively linked mechanisms 5 and 5 supported by the inner peripheral walls 3a and 3a of the valve boxes 2 and 2 and driven by the link mechanisms 5 and 5 to open the valve boxes 2 and 2, respectively. And valve bodies 15 and 15 for opening and closing the ends 2a and 2a.
The open ends 2a and 2a are formed with flange portions 17 and 17, respectively. Moreover, as the connection tool 14, the clamp which clamps the flange parts 17 and 17 or cancels clamping is used, for example.

Each link mechanism 5 has a first shaft body 6 and a second shaft body 7 fixed at both ends to the inner peripheral wall 3a of the valve box 2, and one end 10a supported by the first shaft body 6. The first link bar 10 that rotates about the first shaft body 6 and the one end 11a are supported by the second shaft body 7, and the second link that rotates about the second shaft body 7 And a bar 11. Note that the second shaft body 7 is disposed obliquely below the first shaft body 6 in a direction away from the open end 2a of the valve box 2 in a side view. The length _{L 10} of the first link bar 10 is longer than the length _{L 11} of the second link bar 11, the ratio _(L 10 _{/ L 11)} is ≒ 1.4.
Further, each link mechanism 5 has a distal end 12 a fixed to one end 15 a of the valve body 15, and a body portion 12 b connected to the distal end 12 a is connected to the other end 10 b of the first link bar 10 and the second link bar 11. A valve holder 12 connected to the other end 11b via a third shaft body 8 and a fourth shaft body 9, respectively, in the order close to the tip 12a, and the first shaft body 6, are attached to the first shaft Elastic bodies 13 and 13 for urging the two link bars 10 and 11 to rotate in a direction in which the valve body 15 closes the open end 2a.

  Specifically, the “rotating the first and second link bars 10 and 11 in the direction in which the valve body 15 closes the open end 2a” means, for example, as shown in FIGS. The second link bar 11 is rotated so as to be parallel to the first link bar 10. However, by changing the relative position of the second shaft body 7 with respect to the first shaft body 6 and the distance between the third shaft body 8 and the fourth shaft body 9, the second link bar 11 is not necessarily provided. Even if the first link bar 10 is not rotated in parallel with the first link bar 10, the first and second link bars 10, 11 can be rotated in the direction in which the valve body 15 closes the open end 2a. .

Moreover, the valve bodies 15 and 15 are provided with protrusions 16 and 16 having contact ends 16a and 16a that can contact each other at the other ends 15b and 15b, respectively. The protrusions 16 and 16 are disposed near the upper edges U and U of the other ends 15b and 15b, respectively, when the valve bodies 15 and 15 are viewed from the side. This is because the other ends 15b, 15b are relative to the diameter directions D, D of the valve boxes 2, 2 as compared with the case where the protrusions 16, 16 are disposed closer to the lower edges V, V of the other ends 15b, 15b. This is because it is possible to more effectively prevent the upper edges U and U from colliding with each other if the other ends 15b and 15b are disposed closer to the upper edges U and U when inclined to the maximum. . In addition, although the outer periphery shape in the cross section of the processus | protrusions 16 and 16 is formed in either circular shape, an ellipse shape, or a polygonal shape, you may form in indefinite shape other than this.
Furthermore, the other ends 15b and 15b of the valve bodies 15 and 15 have an absolute value of 0 degrees or more with respect to the diameter directions D and D of the valve cases 2 and 2 when the valve cases 2 and 2 are viewed from the side, It rotates symmetrically at angles A and B within a range of about 50 degrees. The sizes of the angles A and B depend on the relative arrangement of the second shaft body 7 with respect to the first shaft body 6, the lengths of the first and second link bars 10 and 11, and the attachment of the elastic body 13. It is determined by adjusting and combining powers.

In addition, the valve box 2 is formed with a convex portion 18 at the inner end 3 at the opposite end 2b of the open end 2a.
The valve holder 12 is provided with a locking portion 12d at its rear end 12c, and this locking portion 12d is engaged with the convex portion 18 when the valve body 15 rotates to the maximum in the direction of opening the open end 2a. Stopped.

Next, the link mechanism constituting the emergency detachment device 1 will be described in detail with reference to FIGS. 2 and 3. FIG. 2 is a configuration diagram of a link mechanism that constitutes the emergency detachment apparatus according to the embodiment. In addition, about the component shown in FIG. 1, the same code | symbol is attached | subjected also in FIG. 2, and the description is abbreviate | omitted.
As shown in FIG. 2, one link mechanism 5 constituting the emergency detachment device 1 includes a first shaft body 6 in a central portion in the longitudinal direction in a through hole 10 c of one end 10 a of a first link bar 10. Is inserted. Since the end portions 6a and 6a of the first shaft body 6 are fixed to the inner peripheral walls 3a and 3a of the valve boxes 2 and 2, the first shaft bodies 6 and 6 themselves are in relation to the inner peripheral walls 3a and 3a. It cannot be rotated. However, the first link bar 10 can rotate around the first shaft body 6 at one end 10a.
Further, the third shaft body 8 is fitted into the through hole 10d at the other end 10b of the first link bar 10 up to the center in the longitudinal direction. The valve holders 12 are provided on both the left and right sides of the first link bar 10 and support one end 15a of the valve body 15 at two locations. Therefore, the end portions 8a and 8a of the third shaft body 8 are respectively fitted into the through holes 12e and 12e located in the body portions 12b and 12b of the valve holders 12 and 12, and the first link bar 10 The end 10b is configured to rotate around the third shaft body 8.

Further, the second link bar 11 and the second shaft body 7 are also provided on both the left and right sides of the first link bar 10, respectively. Among these, the end portions 7a and 7a of the second shaft bodies 7 and 7 are fixed to the inner peripheral walls 3a and 3a of the valve boxes 2 and 2, respectively, and one end portions 7b and 7b are the second links. Since the second link bars 11 and 11 are inserted into the through holes 11c and 11c of the ends 11a and 11a of the bars 11 and 11 respectively, the second link bars 11 and 11 are both at the ends 11a and 11a. 7 can be rotated around the center. However, the second shaft bodies 7 and 7 themselves cannot rotate with respect to the inner peripheral walls 3a and 3a.
Then, the end portions 9a and 9a of the fourth shaft body 9 are fitted into the through holes 11d and 11d of the other ends 11b and 11b, respectively.
The rear ends 12c of the valve holders 12 and 12 are cylindrical bodies that connect the body portions 12b and 12b by making a substantially right angle to the body portions 12b and 12b, and the locking portions 12d are the rear ends. 12c is provided at the center in the longitudinal direction. Further, since the fourth shaft body 9 is provided so as to penetrate the rear end 12c, the second link bars 11 and 11 both have the fourth end at the other end 11b and 11b and the rear end 12c. The shaft 9 can be turned around.

Next, the link mechanism constituting the emergency detachment device will be further described with reference to FIG. FIG. 3 is a perspective view of the link mechanism that constitutes the emergency detachment apparatus according to the embodiment. 1 and 2 are denoted by the same reference numerals in FIG. 3 and description thereof is omitted. Further, illustration of the valve box other than the flange portion is also omitted.
As shown in FIG. 3, the elastic bodies 13, 13 are provided so as to be non-rotatable and fixed near the center of the first shaft body 6. Each elastic body 13 is a torsion spring including a coil portion 13a wound around the first shaft body 6, and a first arm portion 13b and a second arm portion 13c extending from both ends of the coil portion 13a.
In the elastic bodies 13 and 13, the tips of the first arm portions 13 b and 13 b reach the vicinity of the second shaft bodies 7 and 7, respectively, and the tips of the second arm portions 13 c and 13 c are the third shafts, respectively. It reaches near the body 8,8. More specifically, the tips of the first arm portions 13b and 13b are wound and fixed on the second shaft bodies 7 and 7, respectively, and the tips of the second arm portions 13c and 13c are connected to each other to form the first It contacts the link bar 10 from above. In addition, the 1st arm part 13b and the 2nd arm part 13c have the property to urge in the direction which opens mutually centering on the coil part 13a. For this reason, the first link bar 10 is always urged by the elastic bodies 13 and 13 so that the other end 10b (see FIGS. 1 and 2) moves below the one end 10a.

Next, the operation of the emergency detachment device 1 will be described with reference to FIGS. 1 and 4 to 6.
First, FIG. 1 is a side cross-sectional view when the connector 14 connects the valve boxes 2 and 2 together.
As shown in FIG. 1, the other ends 15 b and 15 b of the valve bodies 15 and 15 are approximately in absolute value with respect to the diameter directions D and D of the valve boxes 2 and 2 when the valve boxes 2 and 2 are viewed from the side. Symmetrically stationary at angles A and B of 50 degrees. This is a case where the valve bodies 15 and 15 rotate to the maximum in the direction of opening the corresponding open ends 2a and 2a, respectively. Such postures of the valve bodies 15 and 15 are brought about by tightening the flange portions 17 and 17 by the connector 14.
Further, the contact ends 16a and 16a of the protrusions 16 and 16 are formed with contact surfaces S and S that can be brought into surface contact with each other in the above case. That is, when the projection 16 is viewed from the side, an acute corner portion T is formed by the contact surface S and the lower edge 16 b of the projection 16.
Therefore, the inclined postures of the valve bodies 15 and 15 as described above are strongly held by the contact surfaces S and S being in surface contact with each other.

  As described above, the state where the contact surfaces S and S are in surface contact with each other is because the valve boxes 2 and 2 are connected to each other by the connector 14, so that if the locking portion 12d is not provided, The inclination of the valve bodies 15 and 15 fluctuates due to the pressure of the fluid passing through the open ends 2a and 2a of the boxes 2 and 2 in one direction (flow direction X in FIG. 1), and the contact surfaces S and S are excessively pressed together. There is a possibility of matching. Therefore, by locking the locking portions 12d and 12d to the convex portions 18 and 18, the pressure contact between the contact surfaces S and S caused by the fluid pressure is suppressed.

Next, the operation of the emergency departure device 1 will be described with reference to FIGS. 4 to 6. 4 to 6 are side sectional views showing the operation of the emergency detachment apparatus according to the embodiment. 1 to 3 are denoted by the same reference numerals in FIGS. 4 to 6 and description thereof is omitted. Also, the illustration of the conduit is omitted.
As shown in FIG. 4, when the fastening of the connector 14 with respect to the flange portions 17, 17 is released, the flange portions 17, 17 begin to separate from each other, and contact surfaces S of the protrusions 16, 16 that are in surface contact with each other. S also starts to separate. At the same time, since the suppression of the urging force of the elastic bodies 13 and 13 starts to be released, in the one valve box 2, the first link bar 10 is arranged such that the other end 10b moves below the one end 10a. Be energized. This action is the same in the other valve box 2, and as a result, the valve bodies 15 and 15 start to rotate in a direction to close the open ends 2a and 2a.

  Next, as shown in FIG. 5, the contact surfaces S and S of the protrusions 16 and 16 are further separated as the distance between the flange portions 17 and 17 increases, so that the elastic bodies 13 and 13 are attached. The cause to suppress the power will disappear. Therefore, in one valve box 2, the latching part 12 d moves away from the convex part 18 by the urging force of the elastic body 13, and the other end 15 b of the valve body 15 is about an absolute value with respect to the diameter direction D of the valve box 2. The rotation continues at an angle A of 20 degrees (see FIG. 1). This action is also the same in the other valve box 2, and the valve bodies 15, 15 continue to rotate in the direction of closing the open ends 2a, 2a.

  Furthermore, as shown in FIG. 6, the lower edges 16b and 16b of the protrusions 16 and 16 are aligned in a straight line with the spacing between the flange portions 17 and 17 being further increased, and the corner portions T and T are aligned with each other. In the one valve box 2, the other end 15 b of the valve body 15 stops at an angle A (see FIG. 1) of 0 degrees in absolute value with respect to the diameter direction D of the valve box 2. That is, the open end 2a corresponding to this is completely closed by one valve body 15, and the discharge of the fluid is stopped. At this time, the third shaft body 8 and the fourth shaft body 9 are positioned below the first shaft body 6 and the second shaft body 7 by the elastic body 13, respectively.

That is, as shown in FIG. 1, in the valve boxes 2, 2, the intermediate portions of the first link bar 10 respectively overlap the ends 11 a, 11 a of the second link bars 11, 11 in side view, and the first As shown in FIG. 6, the initial arrangement in which the second link bars 11 and 11 are inclined with respect to the link bar 10 intersects the first link bar 10 and the second link bars 11 and 11. Without changing the arrangement to be parallel to each other, the valve body 15 is driven to change the open end 2a from the closed state to the open state. This action is the same in the other valve box 2, and the valve bodies 15 and 15 are stationary with the open ends 2a and 2a being closed.
On the other hand, when the lower edges 16b and 16b of the protrusions 16 and 16 are aligned in a straight line and are brought close to each other so that the corner portions T and T are in contact with each other, the first link bar 10 and the like are elastic bodies 13 and 13. 6 is changed from the arrangement shown in FIG. 6 to the arrangement shown in FIG. 1, so that the open ends 2 a, 2 opened by connecting the flange portions 17, 17 with the connector 14. Can be changed to a closed state again.
In order to make the protrusions 16 and 16 approach each other as described above, a plurality of connection pins 17a provided on one flange portion 17 are inserted into a plurality of connection pin holes 17b provided on the other flange portion 17. Is done.

Further, the locus when the valve body rotates will be described in detail with reference to FIG. FIG. 7 is a rotation trajectory diagram illustrating a trajectory when the valve body constituting the emergency detachment device according to the embodiment rotates. The components shown in FIGS. 1 to 6 are denoted by the same reference numerals in FIG. 7 and the description thereof is omitted. Further, illustration of the valve body 15 other than the other end 15b, the link mechanism 5, the first to fourth shaft bodies 6 to 9 and the like is also omitted.
As shown in FIG. 7, in one valve box 2, immediately after the valve body 15 starts to rotate in the direction to close the open end 2a (see FIG. 4), the lower edge V of the other end 15b in the side view is A substantially arc motion K is performed. However, immediately before the valve body 15 closes the open end 2 a (see FIG. 5), the lower edge V performs a linear motion L along a direction orthogonal to the diameter direction D of the valve box 2. In addition, since the end surface E of the open end 2a is parallel to the diameter direction D, the valve body 15 approaches the end surface E of the open end 2a by translational movement, and finally with equal pressure on the entire circumference of the other end 15b. Abut (see FIG. 6).

Finally, a connector for connecting valve boxes will be described with reference to FIG. Fig.8 (a) is a front view of the coupling tool which comprises the emergency detachment apparatus based on an Example, FIG.8 (b) is a block diagram of the control apparatus for controlling a coupling tool. The components shown in FIGS. 1 to 7 are denoted by the same reference numerals in FIG. 8 and the description thereof is omitted.
As shown in FIGS. 8 (a) and 8 (b), the connector 14 holds the annular flange portions 17, 17 over the entire circumference. The connector 14 is connected to the divided pieces 14a to 14d divided about every 90 degrees around the central axis C of the valve box 2, the divided pieces 14a and 14b, and the divided pieces 14c and 14d. The joining tools 19a and 19b are provided. The joining portion 20 of the divided piece 14a and the divided piece 14d is formed with a fixing pin hole 23a for inserting and extracting the fixing pin 22a (see FIG. 8B).
Further, the joining portion 21 of the divided piece 14b and the divided piece 14c is formed with a fixing pin hole 23b for inserting and fixing the fixing pin 22b (see FIG. 8B).

  More specifically, as shown in FIG. 8B, the joining portion 20 includes two plate-like pieces 20a and 20c protruding from the divided piece 14a and one plate-like piece protruding from the divided piece 14d. 20b, and the plate-like pieces 20a to 20c are each provided with a fixing pin hole 23a. Therefore, when the plate-like piece 20b is arranged between the plate-like pieces 20a and 20c, and the respective fixing pin holes 23a are aligned in a straight line, the fixing pin 22a is inserted into the fixing pin hole 23a. The piece 14a and the divided piece 14d are joined together. Therefore, the connecting tool 14 presses the inner peripheral surface of the connector 14 against the flange portions 17 and 17 and fastens it to connect the valve boxes 2 and 2 together. Such a configuration and operation are the same in the joint portion 21.

  Conversely, to release the connection between the valve boxes 2 and 2, the fixing pins 22a inserted into the three fixing pin holes 23a are pulled out. Thereby, since the plate-like piece 20b is extracted from between the plate-like pieces 20a and 20c, the fastening of the connector 14 to the flange portions 17 and 17 is loosened, and the connection between the valve boxes 2 and 2 is released. It is not necessary to pull out the fixing pin 22b inserted into the fixing pin hole 23b in order to release the connection between the valve boxes 2 and 2. Next, a configuration for controlling the extraction of the fixing pin 22a from the fixing pin hole 23a will be described.

As illustrated in FIG. 8B, the extraction of the fixing pin 22 a is controlled by the hydraulic control device 24. The hydraulic control device 24 includes a hydraulic cylinder 26 connected to the fixed pin 22a via a wire rope 25a, and a hydraulic pump 27 that drives the hydraulic cylinder 26 via a hydraulic hose 25b. In the hydraulic control device 24 having such a configuration, by operating the hydraulic pump 27 automatically or manually, the hydraulic cylinder 26 is operated and the wire rope 25a is pulled toward the hydraulic cylinder 26, and all the fixing pins 22a are moved. It is pulled out from the fixing pin hole 23a.
As a result, as shown in FIG. 8A, the divided pieces 14a and 14b, and the divided pieces 14c and 14d are rotated in the rotation directions α and β around the fixing portion 22 with the fixing pin 22b as the center. Rotate. That is, the fastening of the connector 14 with respect to the flange portions 17 and 17 is loosened.

As described above, according to the emergency detachment device 1 according to the present embodiment, when the connector 14 connects the valve boxes 2 and 2, that is, in a normal state, the other end 15 b of the valve bodies 15 and 15. 15b is inclined with respect to the diameter directions D and D of the valve boxes 2 and 2, the amount of fluid passing through the open ends 2a and 2a per unit time can be secured.
Further, in normal times, the inclined postures of the valve bodies 15 and 15 are strongly held by the contact surfaces S and S being in surface contact with each other. Can be prevented from rotating.
In addition, by locking the locking portions 12d and 12d to the convex portions 18 and 18, since the pressure contact between the contact surfaces S and S due to the fluid pressure is suppressed, the passage of fluid can be stably performed. While being able to maintain, the damage of the protrusions 16 and 16 can be prevented, and the useful life of the emergency detachment apparatus 1 can be prolonged.

Further, according to the emergency release device 1, the valve body 15 is always urged to rotate in the direction to close the open end 2a. Therefore, in the emergency, the hydraulic cylinder 26 is operated to fix the fixing pin 22a. By only performing the operation of pulling out from the pin hole 23a, the open end 2a can be closed automatically and quickly, and the operability is good.
Further, the rotation of the valve body 15 is brought about by the link mechanism 5 having a simple configuration including the first and second link bars 10 and 11 and the elastic body 13 which is a torsion spring. There is no need for an electric drive device to be moved. Therefore, the passage of fluid can be automatically stopped with a simple configuration, and the emergency release device 1 can be easily and inexpensively manufactured.
In addition, in an emergency, compared to the case where the valve body is rotated 90 degrees as in the prior art, the time for completing the rotation of the valve bodies 15, 15, that is, the connection of the connector 14 is released. Time until the open ends 2a, 2a are closed by the valve bodies 15, 15 can be shortened.

Furthermore, according to the emergency detachment device 1, the valve body 15 approaches the end surface E of the open end 2a by translation, and finally comes into contact with the entire circumference of the other end 15b with an equal pressure. Sealability can be made uniform over the entire circumference of the open end 2a.
On the other hand, since the open ends 2a and 2a can be easily changed to the closed state again by bringing the corner portions T and T of the protrusions 16 and 16 closer to each other, the open ends 2a and 2a are The operability not only when closing but also when opening it is good.

  The emergency detachment device 1 of the present invention is not limited to the one shown in this embodiment. For example, the locking portions 12d and 12d of the valve holders 12 and 12 may not be provided. Further, the first and second shaft bodies 6 and 7 may be structured to be rotatably supported with respect to the inner peripheral wall 3 a of the valve box 2. In this case, one end 10a of the first link bar 10 and one end 11a of the second link bar 11 are fixed to the first and second shaft bodies 6 and 7 so as not to rotate. In addition, the angles A and B at which the other end 15b of the valve body 15 rotates are about absolute values with respect to the diameter directions D and D of the valve cases 2 and 2 when the valve cases 2 and 2 are viewed from the side. You may be comprised so that it may be larger than 50 degree | times and less than 90 degree | times. Such a change in the size of the angles A and B can be achieved by changing the relative arrangement of the second shaft body 7 with respect to the first shaft body 6 and the lengths of the first and second link bars 10 and 11. It is realized by adjusting. In addition, in the elastic bodies 13 and 13, the tips of the second arm portions 13 c and 13 c are in contact with the rear end 12 c from above instead of the third shaft bodies 8 and 8, respectively. , 9 may be reached. At this time, the second link bars 11 and 11 are always urged by the elastic bodies 13 and 13 so that the other ends 11b and 11b move below the one ends 11a and 11a, respectively.

  INDUSTRIAL APPLICABILITY The present invention can be used as an emergency release device in which a valve body driven by a link mechanism quickly closes the open ends of a pair of conduits in an emergency.

  DESCRIPTION OF SYMBOLS 1 ... Emergency disconnection device 2 ... Valve box 2a ... Open end 2b ... Opposite end 3 ... Interior 3a ... Inner peripheral wall 4 ... Valve structure 5 ... Link mechanism 6 ... 1st shaft body 6a ... End part 7 ... 2nd shaft body 7a, 7b ... end 8 ... third shaft 8a ... end 9 ... fourth shaft 9a ... end 10 ... first link bar 10a ... one end 10b ... other end 10c, 10d ... through hole 11 ... Second link bar 11a ... one end 11b ... other end 11c, 11d ... through hole 12 ... valve holding body 12a ... front end 12b ... body part 12c ... rear end 12d ... locking part 12e ... through hole 13 ... elastic body 13a ... coil Part 13b ... 1st arm part 13c ... 2nd arm part 14 ... Connection tool 14a-14d ... Splitting piece 15 ... Valve body 15a ... One end 15b ... Other end 16 ... Protrusion 16a ... Contact end 16b ... Lower edge 17 ... Flange Part 17a ... Connecting pin 17b ... Connecting pin hole 18 ... Protrusions 19a, 19b ... Joint fixture 20,21 ... Joint part 20a-20c ... Plate-like pieces 22a, 22b ... Fixing pins 23a, 23b ... Fixing pin holes 24 ... Hydraulic control device 25a ... wire rope 25b ... hydraulic hose 26 ... hydraulic cylinder 27 ... hydraulic pump 50 ... conduit 50a ... end 50b ... fastener A, B ... angle α, β ... rotation direction C ... center axis D ... diameter direction E ... end face S ... Contact surface T ... Corner U ... Upper edge V ... Lower edge X ... Flow direction

Claims (6)

A valve box provided at each end of a pair of conduits and containing a valve structure therein;
A connector for connecting the valve boxes to each other;
The valve structure includes a link mechanism supported by an inner peripheral wall of the valve box;
A valve body driven by this link mechanism to open and close the open end of the valve box,
The link mechanism is supported by first and second shaft bodies whose both ends are fixed to the inner peripheral wall, and one end is supported by the first shaft body, and rotates about the first shaft body. A first link bar, one end supported by the second shaft body, a second link bar rotating around the second shaft body, and a tip fixed to one end of the valve body The body part connected to the tip is connected to the other end of the first link bar and the other end of the second link bar via the third and fourth shafts in order from the tip. An elastic body attached to the first shaft body and biasing the first and second link bars so as to rotate the valve body in a direction to close the open end; With
A pair of said valve bodies are provided with the protrusion provided with the contact end which can mutually contact in each other end, The emergency separation apparatus characterized by the above-mentioned. The valve box, in the interior, a convex portion is formed at the opposite end of the open end,
The valve holder is provided with a locking portion at its rear end,
2. The emergency release device according to claim 1, wherein the locking portion is locked to the convex portion when the valve body rotates to the maximum in a direction of opening the open end.   The other ends of the pair of valve bodies are symmetrical at an angle in the range of 0 degree or more and less than 90 degrees in absolute value with respect to the diameter direction of the valve box when the pair of valve boxes are viewed from the side. The emergency disengagement device according to claim 1 or 2, wherein the emergency disengagement device rotates.   The pair of contact ends are formed with contact surfaces that can come into surface contact with each other when the pair of valve bodies are rotated to the maximum in a direction to open the corresponding open ends. The emergency disconnection device according to any one of claims 1 to 3. The elastic body is a torsion spring comprising a coil portion wound around the first shaft body and first and second arm portions extending from both ends of the coil portion,
The distal end of the first arm portion reaches the vicinity of the second shaft body, and the distal end of the second arm portion is near the third shaft body or the fourth shaft body. The emergency detachment device according to any one of claims 1 to 4, wherein the emergency detachment device reaches the emergency detachment device. Each of the pair of open ends is formed with a flange portion,
The emergency detachment device according to any one of claims 1 to 5, wherein the connector is a clamp that clamps or releases the pair of flange portions.

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