JP2011247352A - Locking structure of valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a locking structure of a valve which can maintain a set flow by preventing a valve element from moving.SOLUTION: The locking structure C of a valve which is attached to a flow controllable valve 1 includes a body part 7 in which a flow passage is formed, a valve element part 5 installed to be advanced into and retreated from the flow passage, a handle part 4 which is rotated to adjust the advanced and retreated amounts of the valve element part, and a rotation prevention member 8 for preventing the relative rotation of the body part 7 to the handle part 4. The locking structure further includes a valve stem part 2 which is connected to the valve element part 5 and in the outer periphery of which a male screw groove 23 is formed, a sleeve part 3 which is fixed to the handle part 4 and in which a female screw groove 36 threaded with the male screw groove 23 is formed, a distance holding mechanism 10 for holding constant the distance between the sleeve part 3 and the body part 7, and a co-rotation prevention mechanism 11 for preventing the valve stem part 2 and the sleeve part 3 from co-rotating.

Description

  The present invention relates to a valve locking structure.

  Conventionally, in a semiconductor manufacturing field, a liquid crystal manufacturing field, etc., in order to control the flow of a fluid such as pure water, a valve having a valve body that can adjust the opening degree to seal the fluid or adjust the flow rate. Is generally used.

  By the way, since such a valve is assembled by screwing together a plurality of parts with a screw structure, it is said that loosening occurs in the screw structure when fluid pressure acts or vibrates from the inside. There was a problem.

  Therefore, for example, in Patent Document 1, a female thread part into which a bush is screwed is formed on the inner peripheral surface of an annular protrusion formed on the upper part of the valve body, and the female thread part and a male thread of a reverse screw are formed on the outer peripheral surface. A configuration in which a threaded portion is formed and a cap member is screwed is disclosed. According to this configuration, it is possible to prevent the bush from loosening and to prevent the bush from popping out due to fluid pressure.

JP 2007-46725 A

  However, the loosening prevention structure of Patent Document 1 prevents the bush from loosening and popping out, and does not prevent the movement of the valve element whose opening is adjusted. For this reason, there is a possibility that the set flow rate cannot be maintained due to the movement of the valve body in a place where vibration is intense.

  Therefore, an object of the present invention is to provide a valve locking prevention structure that can maintain a set flow rate by preventing movement of the valve body.

  In order to achieve the above object, the valve locking structure of the present invention is a valve locking structure that is attached to a valve capable of adjusting the flow rate. A valve body portion that is installed so as to freely advance and retract, a handle portion that adjusts the amount of advancement and retraction of the valve body portion by rotating, and a rotation prevention member that prevents relative rotation between the main body portion and the handle portion. It is characterized by providing.

  A valve rod portion connected to the valve body portion and having a male screw groove formed on an outer periphery thereof; a sleeve portion fixed to the handle portion and having a female screw groove screwed into the male screw groove; A distance holding mechanism that keeps the distance between the sleeve portion and the main body portion constant, and a co-rotation preventing mechanism that prevents co-rotation of the valve stem portion and the sleeve portion can be further provided. .

  Furthermore, as the rotation preventing member, a main body contact portion that contacts the outer surface of the main body portion to prevent relative movement, a handle contact portion that contacts the outer surface of the handle portion to prevent relative movement, the main body portion, and the handle portion On the other hand, it can be set as the structure provided with the cover member which has the attachment / detachment mechanism which becomes attachable / detachable.

  And the said handle contact part can be set as the structure which has a bottom face contact part which touches the bottom face which faced the main-body part side of the said handle part, and prevents a relative movement.

  Further, a fine male screw groove finer than the female screw groove is formed on the outer periphery of the sleeve portion in the vicinity of the position protruding from the main body portion, and is screwed into the fine male screw groove as the rotation preventing member. It can be set as the structure provided with the locking member in which the fine internal thread groove to be formed is formed.

  Thus, the valve locking structure of the present invention is a valve locking structure that is attached to a valve capable of adjusting the flow rate. And the main-body part, the valve body part, the handle | steering-wheel part, and the rotation prevention member which prevents relative rotation with a main-body part and a handle | steering-wheel part are provided.

  For this reason, by preventing the rotation of the handle portion with respect to the main body portion by the rotation preventing member, the set flow rate can be maintained by preventing the movement of the valve body portion whose advance / retreat amount is adjusted by the rotation of the handle portion.

  Also, a valve stem portion connected to the valve body portion and having a male screw groove formed on the outer periphery, a sleeve portion having a female screw groove fixed to the handle portion and screwed into the male screw groove, and the sleeve portion and the main body portion The handle portion holds the distance from the main body portion constant by further including a distance holding mechanism that keeps the distance between the valve stem portion and the sleeve portion and a co-rotation prevention mechanism that prevents co-rotation between the valve stem portion and the sleeve portion. In this state, the valve body portion is moved forward and backward so that a rotation preventing member for preventing relative rotation can be easily installed.

  Further, as a rotation preventing member, the main body contact portion that contacts the outer surface of the main body portion to prevent relative movement, the handle contact portion that contacts the outer surface of the handle portion to prevent relative movement, and the main body portion and the handle portion are detachable. By providing the cover member having the attaching / detaching mechanism, it is possible to reliably contact both the main body portion and the handle portion with a simple structure and prevent relative rotation.

  The handle contact portion has a bottom surface contact portion that contacts the bottom surface of the handle portion facing the main body portion side to prevent relative movement, so that there is no room in the space between the main body portion and the handle portion. However, the contact area for fixing the handle portion can be widened.

  Further, a fine male screw groove finer than the female screw groove is formed on the outer periphery in the vicinity of the position protruding from the main body portion of the sleeve portion, and a fine female screw groove that is screwed into the fine male screw groove as an anti-rotation member Since the sleeve portion and the main body portion that do not move up and down are firmly fastened by the lock member, rotation of the handle portion relative to the main body portion can be prevented.

It is sectional drawing explaining the structure of the closed state of the valve | bulb of Example 1. FIG. It is a disassembled perspective view which decomposes | disassembles and demonstrates the structure of the valve | bulb of Example 1. FIG. It is explanatory drawing explaining the structure of the cover member of Example 1. FIG. (A) is the rear view which displayed a part as a cross section, (b) is a top view, (c) is a front view. It is sectional drawing explaining the structure of the valve | bulb of Example 2. FIG. It is explanatory drawing explaining the structure of the locking member of Example 2. FIG. (A) is sectional drawing, (b) is a top view.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[Valve configuration]
First, the configuration of the valve 1 will be described. The valve 1 of this embodiment is inserted in the middle of the piping, and by rotating the handle portion 4 by hand, the valve body portion 5 (see FIG. 1) is moved up and down to open and close the flow path. It adjusts the flow rate of fluids such as chemicals and pure water flowing inside.

  As shown in FIGS. 1 and 2, the valve 1 has a stem stud 2 as a valve stem portion having a valve body portion 5 attached to one end, and a male screw groove 23 formed on the outer periphery of the stem stud 2. An internally threaded needle including a yoke sleeve 3 as a sleeve portion in which a female screw groove 36 to be screwed is formed, a handle portion 4 for rotating the yoke sleeve 3, and a main body portion 7 in which a flow path is formed. It is a valve.

  The stem stud 2 as a valve stem part is for moving the piston 51 connected to the valve body part 5 up and down. The stem stud 2 is entirely formed in a rod shape by metal, and the piston hanging member 26 is fixed with a screw 27. A cylindrical mounting portion 24, a projection 25 on the side surface of the mounting portion 24, a male screw groove 23 provided continuously to the mounting portion 24, a shaft portion 22 protruding from the male screw groove 23, and a shaft portion. And a flat surface portion 21 in which a part of the cross section of 22 is cut out.

  The protrusion 25 on the side surface of the attachment portion 24 prevents the stem stud 2 from rotating together with the yoke sleeve 3 when the handle portion 4 is rotated, and the section of the attachment portion 24 including the protrusion 25 rotates. It is formed so as to fit into the hole shape of the stopper metal 28, and constitutes the co-rotation prevention mechanism 11 together with the rotation stopper metal 28.

  In addition, the male thread groove 23 is formed so as to be screwed into the female thread groove 36 of the yoke sleeve 3, and receives the rotation of the yoke sleeve 3 that rotates integrally with the handle portion 4 to receive the stem stud 2. The whole moves up and down.

  On the other hand, the shaft portion 22 of the stem stud 2 is inserted into the reduction gear 46, the scale plate 47, and the pointer 48, and is fixed to the rotation direction of the reduction gear 46 and the pointer 48, but rotates together. Is not fixed in the direction of rotation and does not rotate together.

  The valve body portion 5 is formed of a synthetic resin, a synthetic rubber, or the like, and has a bowl-shaped contact portion and a hemispherical protrusion so that the flow rate changes substantially linearly according to the change in the opening degree. Part.

  The yoke sleeve 3 as a sleeve portion is for transmitting the rotation of the handle portion 4 to the stem stud 2 and moving up and down. The yoke sleeve 3 is formed of a metal in a cylindrical shape as a whole and is fitted to the handle portion 4. The head 31 fixed integrally, the groove part 32 of retaining, the holding | maintenance part 33 holding the stem stud 2, and the collar part 34 latched on the bonnet 71 are provided.

  A pair of semicircular washers 37, 37 are fitted to the groove portion 32 from both left and right sides, and are covered with a cap 38 having the same diameter in a circular state so as not to be separated again.

  Then, the semicircular washers 37 and 37 fitted in the groove portion 32 are hooked on the upper surface of the bonnet 71, and the collar portion 34 is hooked on the lower surface of the bonnet 71. The distance holding mechanism 10 is configured to hold a constant distance.

  A female screw groove 36 is screwed into the through hole provided in the holding portion 33 from the end surface on the flange portion 34 side. The female screw groove 36 is formed so as to be screwed into the male screw groove 23 of the stem stud 2, and moves the stem stud 2 up and down by rotating integrally with the handle portion 4.

  In addition, the head portion 31 is provided with a hole 35 continuous with the female screw groove 36, and the shaft portion 22 of the stem stud 2 is inserted therethrough.

  A pair of nuts 61 and 62 serving as movement restraining means are screwed onto the shaft portion 22 of the stem stud 2 at a portion protruding from the head 31 of the yoke sleeve 3.

  Further, the handle portion 4 is formed of a synthetic resin or the like, and a container-like casing 40 that accommodates the whole, a protruding portion 41 that protrudes from the lower portion of the casing 40, and a head portion 31 of the yoke sleeve 3 are fitted together. A hole 42 formed therein, a housing hole 43 formed continuously with the hole 42 and housing a pair of nuts 61, 62, reduction gears 44, 45, 46, a scale plate 47 for displaying the opening degree, and an opening degree And a cover 49 that is transparently molded and fits into the casing 40.

  The main body portion 7 is formed of a synthetic resin. The upstream side primary flow passage 75, the downstream secondary flow passage 76, and the valve seat portion 77 with which the valve body portion 5 abuts. And flange portions 73 and 74 to be fixed to the pipe flange, and a bonnet 71 is fitted to the upper portion.

  The bonnet 71 is formed in a conical shape (truncated conical shape) with the tip cut off by a synthetic resin, and a through hole through which the yoke sleeve 3 is inserted is formed at the center, and two anti-rotation fittings 28 are formed at the lower part. And are fastened to the upper part of the main body 7 and fixed integrally.

[Composition of cover member]
Next, the configuration of the cover member 8 will be described.

  As shown in FIG. 3, the cover member 8 as the rotation preventing member of the present embodiment forms a cylindrical skeleton as a whole by tying together a pair of semi-cylindrical portions 80 and 80. The inner surface of the semi-cylindrical portion 80 is in contact with the outer surface of the main body portion 7 to prevent relative movement, and the side surface contact as the handle contact portion that contacts the outer surface of the handle portion 4 and prevents relative movement. Part 82, bottom contact part 83, attachment / detachment mechanism 84 that is attachable / detachable to / from main body part 7 and handle part 4, and hinge mechanism 85 that integrates the pair of semi-cylindrical parts 80, 80 so as to be openable and closable. .

  The main body contact portion 81 is formed in a truncated conical shell shape along the truncated conical inclined surface of the bonnet 71 of the main body portion 7 with synthetic rubber or synthetic resin. Bonded to the bottom of the inner surface.

  The side contact portion 82 as the handle contact portion is formed in a cylindrical shell shape along the side surface of the protruding portion 41 at the lower portion of the handle portion 4 by synthetic rubber or synthetic resin. It is bonded to the inner surface middle part of the.

  Similarly, the bottom surface contact portion 83 as the handle contact portion is formed in a disc shape so as to be along the bottom surface of the handle portion 4 facing the main body portion 7 side by synthetic rubber or synthetic resin. Adhered to the upper surface of 80.

  Further, the attaching / detaching mechanism 84 is hooked by hanging a metal ring 84a on the hook 84b and tilting it to the opposite side, and covers the main body portion 7 and the handle portion 4 with the semi-cylindrical portions 80 and 80 opened. The semi-cylindrical portions 80 and 80 are hooked while pressing the main body contact portion 81 and the side contact portion 82 inward so that a cylinder is formed. Then, the pressing force applied to the bonnet 71 from the main body contact portion 81 also acts in the direction of the handle portion 4 due to the inclination of the bonnet 71, and the bottom surface contact portion 83 is pressed against the bottom surface of the handle portion 4.

  The main body portion 7, the valve body portion 5, the handle portion 4, and the cover member 8 as the rotation preventing member form a valve loosening prevention structure C of this embodiment.

[Action / Effect]
Next, the operation and effect of the valve locking structure C of this embodiment will be described.

  (1) As described above, the valve locking structure C of this embodiment is the valve locking structure C attached to the valve 1 capable of adjusting the flow rate. And the main-body part 7, the valve body part 5, the handle | steering-wheel part 4, and the cover member 8 as a rotation prevention member which prevents the relative rotation of the main-body part 7 and the handle | steering-wheel part 4 are provided.

  For this reason, by preventing the rotation of the handle part 4 relative to the main body part 7 by the cover member 8, the movement of the valve body part 5 whose advance / retreat amount is adjusted by the rotation of the handle part 4 can be prevented and the set flow rate can be maintained. .

  In addition, by bringing the cover member 8 having a constant mass into contact with the handle portion 4 and the main body portion 7 and integrating them, the cover member 8 has an effect of suppressing vibration itself.

  (2) Further, a stem stud 2 as a valve stem portion connected to the valve body portion 5 and having a male screw groove 23 formed on the outer periphery, and a female screw groove 36 fixed to the handle portion 4 and screwed into the male screw groove 23. The yoke sleeve 3 as the sleeve portion formed with the sleeve, the distance holding mechanism 10 that keeps the distance between the yoke sleeve 3 and the body portion 7 constant, and the co-rotation that prevents the stem stud 2 and the yoke sleeve 3 from co-rotating. And an anti-rotation member that prevents relative rotation because the handle portion 4 rotates in a state where the distance from the main body portion 7 is kept constant to move the valve body portion 5 forward and backward. The cover member 8 can be easily installed.

  That is, when the distance between the handle portion 4 and the main body portion 7 changes, the shape changes depending on the degree of opening, so that the rotation preventing member is brought into contact with the outer surfaces of the handle portion 4 and the main body portion 7. Although it becomes difficult, if the distance is constant, the contact can be easily made.

  (3) Further, as a rotation preventing member, a main body contact portion 81 that contacts the outer surface of the main body portion 7 to prevent relative movement, and a side contact portion 82 as a handle contact portion that contacts the outer surface of the handle portion 4 and prevents relative movement. By providing the cover member 8 having the attaching / detaching mechanism 84 that can be attached to and detached from the main body portion 7 and the handle portion 4, both the main body portion 7 and the handle portion 4 can be reliably brought into contact with each other by a simple structure. Rotation can be prevented.

  That is, since the side contact portion 82 and the main body contact portion 81 are integrated by being bonded to the semi-cylindrical portion 80, the side contact portion 82 does not move relative to the handle portion 4, and the main body contact If the part 81 does not move relative to the main body part 7, the handle part 4 does not rotate relative to the main body part 7.

  In addition, if the cover member 8 is configured to be attached to and detached from the valve 1 by having the attaching / detaching mechanism 84, the cover member 8 can be installed only in the valve at a position where vibration is strong and loosening is likely to occur. Therefore, the configuration of the valve 1 can be simplified.

  (4) And, as the handle contact portion, by having the bottom surface contact portion 83 that contacts the bottom surface of the handle portion 4 facing the main body portion 7 side and prevents relative movement, the space between the main body portion 7 and the handle portion 4 is obtained. Even when there is not enough space, the contact area for fixing the handle portion 4 can be widened.

  That is, in general, the installation space of the valve is often limited to be narrow, and the height of the valve itself is also low. For this reason, the space between the handle portion 4 and the main body portion 7 is also limited, and there may be a case where a sufficient contact area cannot be taken on the side surface of the handle portion 4. Therefore, the contact area can be increased by forming the handle portion 4 so as to be in contact with the bottom surface.

  Hereinafter, the valve locking structure C1 including the lock member 9 as an anti-rotation member will be described with reference to FIGS. The description of the same or equivalent parts as described in the above embodiment will be given with the same reference numerals.

[Constitution]
First, the configuration will be described with reference to FIGS. 4 and 5. The valve 1 of this embodiment includes a stem stud 2, a yoke sleeve 3, a handle portion 4, and a main body portion 7, as in the first embodiment.

  Further, the yoke sleeve 3 includes a head portion 31, a groove portion 32 for fixing, a holding portion 33, and a flange portion 34. In order to prevent the yoke sleeve 3 from coming off, a screw 63 is hooked in the groove portion 32 through the protruding portion 41 of the handle portion 4.

  Further, a fine male screw groove 39 is formed on the outer periphery in the vicinity of the position protruding from the main body portion 7 at the upper part of the yoke sleeve 3, and a lock having a fine female screw groove 92 formed so as to be screwed into the fine male screw groove 39 is formed. The member 9 is installed with the plate packing 64 sandwiched between the upper surface of the bonnet 71.

  Since the fine male screw groove 39 is formed in a finer mesh than the female screw groove 36, the yoke sleeve 3 and the main body portion 7 can be connected with a stronger force than the yoke sleeve 3 rotates and moves the stem stud 2 up and down. To fix.

  Further, as shown in FIG. 5, the lock member 9 is formed of a metal plate, and is formed to have a regular hexagonal outer edge as a grip portion 91 that can be easily turned by hand or a tool. A fine female screw groove 92 finer than the female screw groove 36 is formed in the hole. The shape of the lock member 9 does not have to be a regular hexagon as long as it can be easily tightened with a hand or a tool. It may be something like this.

  Further, the plate packing 64 is formed in a donut plate shape by synthetic rubber, synthetic resin, or the like, and the lock member 9 and the main body portion 7 are prevented so as to prevent relative rotation between the lock member 9 and the main body portion 7. It installs in the state pressed between the bonnet 71 upper surfaces.

  Thus, in this embodiment, the main body 7, the valve body 5, the handle 4, and the lock member 9 as the rotation preventing member form a valve locking prevention structure C1.

[Action / Effect]
Next, the operation and effect of the valve locking structure C1 of this embodiment will be described.

  (1) Thus, the valve locking structure C1 of the present embodiment is the valve locking structure C1 attached to the valve capable of adjusting the flow rate. And the main-body part 7, the valve body part 5, the handle | steering-wheel part 4, and the lock member 9 as a rotation prevention member which prevents the relative rotation of the main-body part 7 and the handle | steering-wheel part 4 are provided.

  For this reason, by preventing the rotation of the handle portion 4 with respect to the main body portion 7 by the lock member 9, it is possible to prevent the movement of the valve body portion 5 whose advance / retreat amount is adjusted by the rotation of the handle portion 4 and to maintain the set flow rate. .

  (2) Further, a fine male screw groove 39 finer than the female screw groove 36 is formed on the outer periphery in the vicinity of the position protruding from the main body portion 7 of the yoke sleeve 3 as the sleeve portion. By providing the lock member 9 formed with the fine female screw groove 92 that is screwed into the male screw groove 39, the yoke sleeve 3 and the main body 7 that do not move up and down are firmly fastened by the lock member 9. Rotation of the handle portion 4 with respect to the main body portion 7 can be prevented.

  That is, when the lock member 9 is tightened, a force for pulling upward acts on the yoke sleeve 3, but since the collar portion 34 is hooked on the lower surface of the bonnet 71, the lock member 9 is not pulled out. 9 exerts a force to press against the upper surface of the bonnet 71. Then, the fine male screw groove 39 of the yoke sleeve 3 and the fine female screw groove 92 of the lock member 9 are pressed against each other and fixed without rotating.

  In this case, since the lock member 9 is screwed into the yoke sleeve 3 that is fixed in the vertical direction and does not move up and down, the lock member 9 can be firmly tightened. In other words, when the handle portion 4 (and the yoke sleeve 3) is configured to move up and down, the handle portion 4 increases the opening degree of the valve body portion 5 even when the lock member 9 is tightened to the main body portion 7. Since the tightening force is released due to the rotation, the looseness is accelerated.

  On the other hand, in the case of the present embodiment, even if the yoke sleeve 3 is rotated, the tightening force is not released by the rotation of the yoke sleeve 3, and the loosening does not proceed at an accelerated rate. However, as a precaution, the direction in which the lock member 9 is loosened is preferably opposite to the direction in which the yoke sleeve 3 increases the opening.

  Further, a plate packing 64 made of synthetic rubber, synthetic resin or the like is installed between the lock member 9 and the bonnet 71, so that the fine male screw groove 39 and the fine female screw groove 92 have a stronger force. Press to prevent loosening.

  In addition, since it is as substantially the same as the said Example about another structure and an effect, description is abbreviate | omitted.

  The embodiment of the present invention has been described in detail with reference to the drawings, but the specific configuration is not limited to this embodiment, and design changes that do not depart from the gist of the present invention are not limited to the present invention. included.

  For example, in the first embodiment, the case where the handle contact portion includes the side surface contact portion 82 and the bottom surface contact portion 83 and the main body contact portion 81 having a shape along the bonnet 71 has been described. However, the present invention is not limited thereto. Instead, the handle contact portion and the main body contact portion may have any configuration as long as the configuration prevents relative rotation.

  In the first embodiment, the case where the bottom surface contact portion 83 is provided as the handle contact portion has been described. However, the present invention is not limited to this, and the bottom surface contact portion may not be provided.

  Furthermore, in the first and second embodiments, the case where the present invention is applied to the needle valve as the valve 1 has been described. However, the present invention is not limited to this, and the present invention can also be applied to other types of valves.

C, C1 Valve locking mechanism 1 Valve 10 Distance holding mechanism 11 Co-rotation prevention mechanism 2 Stem stud (valve stem)
23 Male thread groove 3 Yoke sleeve (sleeve part)
36 Female thread groove 39 Fine male thread groove 4 Handle portion 5 Valve body portion 7 Body portion 71 Bonnet 8 Cover member (rotation preventing member)
81 Body contact part 82 Side contact part (handle contact part)
83 Bottom contact area (handle contact area)
84 Detachable mechanism 9 Lock member (rotation prevention member)
91 Grip part 92 Fine female thread groove

Claims (5)

A valve locking structure attached to a valve with adjustable flow rate,
A main body in which a flow path is formed;
A valve body portion that is installed so as to freely advance and retract with respect to the flow path;
A handle part for adjusting the amount of advancement and retraction of the valve body part by rotating;
An anti-loosening structure for a valve, comprising: an anti-rotation member that prevents relative rotation between the main body and the handle. A valve stem portion connected to the valve body portion and having an external thread groove formed on the outer periphery;
A sleeve portion fixed to the handle portion and formed with a female screw groove to be screwed into the male screw groove;
A distance holding mechanism for holding a constant distance between the sleeve portion and the main body portion;
The valve locking prevention structure according to claim 1, further comprising a co-rotation preventing mechanism that prevents co-rotation of the valve stem portion and the sleeve portion.   As the rotation preventing member, with respect to the main body contact portion that contacts the outer surface of the main body portion to prevent relative movement, the handle contact portion that contacts the outer surface of the handle portion to prevent relative movement, the main body portion, and the handle portion The valve locking prevention structure according to claim 1 or 2, further comprising a cover member having a detachable mechanism that is detachable.   4. The valve locking structure according to claim 3, wherein the handle contact portion has a bottom surface contact portion that contacts a bottom surface of the handle portion facing the main body and prevents relative movement. On the outer periphery of the sleeve portion in the vicinity of the position protruding from the main body portion, fine male screw grooves are formed which are finer than the female screw grooves,
The valve locking prevention structure according to claim 2, further comprising: a lock member formed with a fine female screw groove that is screwed into the fine male screw groove as the rotation preventing member.

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