JP2017176698A - Flowing water detection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flowing water detection device for detecting flowing water in a flow path, entire of which can be provided in a compact manner and in which detection accuracy is improved by easily assembling a spindle for transmitting actuation of a ball valve body and an input side of a detection mechanism for detecting rotation of the spindle in an aligned state.SOLUTION: In a body 2 having an inflow port 11 and an outflow port 12, a seating part 13 on which a ball valve body 3 is seated, an opening 15 to be covered, and a guide part 20 through which the ball valve body 3 is lifted by fluid pressure are provided. A spindle 4 having a paddle 32, in which the lifting operation of the ball valve body 3 is converted into a rotational motion, is pivotally supported inside the body 2 located in the vicinity of the opening 15 in a rotatable manner. The spindle 4 is connected to a detection mechanism 7 fixed to the body 2.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a water flow detection device that is used in, for example, a sprinkler facility to detect water flow when a fire occurs.

  Conventionally, a flowing water detection device is generally provided in the middle of a flow path of a sprinkler facility or the like, and inside thereof, there is a check valve structure operated by water pressure, and a detection mechanism for detecting the operation of the valve body. The operation of the valve body is transmitted to the detection mechanism through the transmission mechanism and the flowing water is detected.

  As this type of water flow detection device, for example, the water flow detection device of Patent Document 1 is disclosed. This flowing water detection device has a ball and a detection mechanism part provided with a delay mechanism inside, and a spindle part and a ball guide are provided between them as a transmission mechanism part of the movement of the ball. In this way, in the case of a structure that detects flowing water using a ball, it is possible to increase the water stoppage at the time of closing the valve while maintaining compactness compared to a structure using a so-called swing type valve body. As in the case, it is not necessary to provide play at the shaft-attached portion, so that the detection accuracy at a minute flow rate is also improved.

  In the flowing water detection device, the detection mechanism is configured in a rectangular housing, and the housing is fixed to the side of the body portion in which the ball is stored with screws. The spindle part is rotatably attached to a cover part that is flange-joined to the body part, a ball guide operated by a ball is integrally attached to one end side of the flow path side, and the other end side is connected to the input part of the detection mechanism part. Is done. With this structure, in this running water detection device, the bolts that secure the cover part are loosened, so that the spindle part and the ball guide are separated from the body part together with the cover part, and the inside of the body part is opened. The ball can be taken out and maintenance can be performed.

Japanese Patent No. 4796898

  However, in the structure in which the spindle portion is attached to the body portion via the cover portion as in the flowing water detection device of Patent Document 1, since the cover portion bulges outward, the large size of the entire flowing water detection device. It led to

  At the time of assembly, in order to align the axis of the spindle portion attached to the cover portion with the input portion of the detection mechanism portion fixed to the body portion, it is necessary to attach the cover portion while aligning the body portion. . In this case, in order to increase the concentricity of the spindle part with respect to the input part of the detection mechanism part, the combination part of the body part and the cover part is formed with high processing accuracy, and the play of the cover part with respect to the body part is reduced. It is necessary to improve the positional accuracy by minimizing.

  On the other hand, in order to increase the concentricity between the input part of the detection mechanism part and the spindle part, a play is provided in advance in the screwing part between the housing and the body part assuming a looseness of the flange, etc., and the spindle is inserted through this play. It is also conceivable to adjust the unit and the input unit of the detection mechanism unit coaxially. However, in this case, since the alignment work is entrusted to a worker on site, the spindle part and the input part of the detection mechanism part are not connected in a concentric state, and there is a possibility that the accuracy is lowered. In this case, the ball guide cannot be operated smoothly, and the movement of the ball trying to float by running water may be hindered by the ball guide, or the ball guide after the rotating operation may be difficult to return by the urging force of the spring. As a result, the state of the ball cannot be accurately sent to the control panel as a detection signal, which may hinder the operation of the alarm device.

  Furthermore, as another means for increasing the concentricity, it is conceivable to provide a transmission mechanism portion on the body side. However, in this case, it is difficult to take out the ball when the ball guide or the spindle portion overlaps the ball outlet. Become. In order to cope with this, when the body part is provided so as to be disassembled in consideration of maintainability, the number of parts increases and the structure becomes complicated.

  The present invention was developed in order to solve the conventional problems, and the object of the present invention is a flowing water detection device for detecting flowing water in a flow path, and the ball valve can be provided as a whole. It is an object of the present invention to provide a water flow detection device in which a spindle for transmitting body operation and an input side of a detection mechanism for detecting the rotation of the spindle are easily assembled so as to improve detection accuracy.

  In order to achieve the above object, the invention according to claim 1 is characterized in that a body having an inflow port and an outflow port includes a seating portion on which a ball valve body is seated, an opening portion to be covered, and a ball valve body. And a spindle having a paddle for converting the upward movement of the ball valve element into a rotational motion. The spindle is rotatably supported inside the body located in the vicinity of the opening. Is a flowing water detection device connected to a detection mechanism fixed to the body.

  According to a second aspect of the present invention, the spindle comprises a spindle portion with a paddle and a detection shaft, both of which are divided structures, and both are joined and separated from the opening in a state where the spindle portion is separated. It is a flowing water detection apparatus which can be taken out.

  The invention according to claim 3 is the flowing water detection device in which the space portion to be moved to separate the spindle portion is provided on the inner wall of the bulging portion of the body.

  The invention according to claim 4 is the flowing water detection device in which the space portion is a space region in which the ball valve body is housed and taken out from the opening.

  The invention according to claim 5 is a flowing water detection device in which a stopper member is mounted in the opening, and the stopper member supports the spindle portion.

  The invention according to claim 6 is a flowing water detection device in which a spring hooked on both the stopper member and the paddle is provided inside the body, and the spring is a spring that urges the paddle in the pressing direction of the ball valve body. is there.

  The invention according to claim 7 is the flowing water detection device in which the spring is a torsion coil spring, one end of the torsion coil spring is engaged with the stopper member, and the other end is engaged with the paddle.

  According to the first aspect of the present invention, there is provided a flowing water detection device for detecting flowing water in a flow path, wherein a spindle having a paddle is rotatably supported inside the body, and the spindle for transmitting the operation of the ball valve body includes: By being connected to the detection mechanism fixed to the body, the spindles and paddles can be centrally arranged in the body, and the entire body can be made compact without the need to provide the body in a divided structure. As a result, the distance between the surfaces can be kept short, and the projecting portion to the surroundings can be minimized to install in a narrow space. Without adjusting the spindle or machining parts with high precision, the spindle and the input side of the detection mechanism can be easily aligned and integrated even during reassembly after disassembly to improve the detection accuracy of running water it can.

  According to the second aspect of the present invention, the spindle is provided in a split structure including a spindle portion with a paddle and a detection shaft, and both are joined and separated from the opening so that the detection mechanism and the detection shaft can be taken out. The spindle part can be attached and detached through the opening without removing it from the body or providing the body in a split structure.As a result, the spindle can be easily assembled and the ball valve body can be removed from the opening with the spindle removed. Maintenance of each part and body can be performed easily. On the other hand, it is easy to assemble because the ball valve body can be inserted from the opening with the detection mechanism fixed to the body, and then the spindle can be connected to the detection shaft. Can be connected.

  According to the invention of claim 3, the space is provided in the inner wall of the bulging part of the body, so that the spindle part can be attached and detached inside the body without damaging the spindle part or the body through the bulging part. it can.

  According to the invention of claim 4, the ball valve body can be attached and detached from the opening in a state where the spindle part is separated and removed without providing the body in a divided structure, and maintenance of the ball valve body and the inside of the body is possible. Become. For this reason, workability at the time of disassembling / assembling is improved, and the whole can be made compact.

  According to the fifth aspect of the present invention, the spindle portion is supported by the stopper member, so that the spindle portion is rotated in an aligned state to suppress the swing of the paddle, and the ball valve element is lifted from the paddle to the spindle portion. It is possible to accurately convert the water into a rotational motion and transmit the rotational motion of the spindle part to the detection shaft to detect the flowing water with high accuracy. By filling the opening space on the spindle take-out side with the stopper member, the rotation of the spindle is stabilized, and the stopper member is detachably provided from the opening portion so that the spindle can be easily removed with the stopper member removed. Can be removed.

  According to the invention of claim 6, by using the space between the stopper member and the paddle to incorporate the spring in the body, the inside of the detection mechanism can be simplified and the overall size can be reduced. The operating ball valve body is pressed by a spring through a paddle, and the movement state of the ball valve body is accurately transmitted from the spindle portion to the detection shaft, so that flowing water can be detected with high accuracy according to the behavior of the ball valve body. By attaching the spring to the stopper member and the paddle, the spring can be removed and taken out from the opening, and the stopper and the spindle can be taken out from the opening to easily perform maintenance and the like.

According to the invention which concerns on Claim 7, by making a spring a torsion coil spring, exerting a strong spring force while aiming at weight reduction, a paddle can be pressed against a ball valve body, and flowing water can be detected correctly, and the coil part is made. It can be mounted on the outer periphery of the spindle part to maintain compactness. Since energy can be increased with the same weight as compared with a general coil spring, it becomes possible to apply a predetermined urging force to the paddle while saving space.
Since the arm portion at one end can be locked to the stopper and the arm portion at the other end can be locked to the paddle with the coil portion mounted on the spindle portion, the spring can be easily attached and detached.

It is sectional drawing which shows embodiment of the flowing water detection apparatus in this invention. It is sectional drawing which shows the open state of the flowing water detection apparatus of FIG. It is a separation perspective view of a flowing water detection device. It is AA sectional drawing of FIG. FIG. 4 is a partially enlarged perspective view of FIG. 3. It is an isolation | separation perspective view which shows the assembly state of a spindle. It is a schematic front view which shows the inside of the detection mechanism at the time of a full open. It is a schematic front view which shows the inside of the detection mechanism at the time of valve closing. It is a side view of a detection mechanism.

  Below, the flowing water detection apparatus in this invention is demonstrated in detail based on embodiment. 1 to 4 show an embodiment of a flowing water detection device according to the present invention. This flowing water detection device (hereinafter referred to as “device main body 1”) includes a body 2, a ball valve body 3, a spindle 4, and a stopper member 5. , A spring 6 and a detection mechanism 7, and a control valve 8 is provided on the primary side thereof.

  1 to 3, the body 2 is formed of, for example, cast iron or stainless steel, and a flow path 10 is formed therein, and the primary side of the flow path 10 is an inlet 11 and the secondary side is an outlet 12. It has become. Further, an annular seat portion 13 is formed in the body 2, and the ball valve body 3 is provided on the seat portion 13 so as to be seated. A circular opening 15 is formed between the inflow port 11 and the outflow port 12 in a direction intersecting with the inflow port 11, and a plate-like cover 17 is interposed in the opening 15 via a gasket 16 in FIG. 9. The bolts 18 are detachably provided, and the cover 15 covers the opening 15.

  As shown in FIGS. 1 and 2, guide parts 20 are provided on both sides of the flow path 10, and the guide parts 20 protrude on both sides of the flow path 10 so that the interval is narrower than the diameter of the ball valve body 3. The ball valve body 3 formed and lifted by the fluid pressure is guided by the guide portion 20 so that the valve open state can be maintained. At the back of the opening 15 between the opening 15 and the outflow inlets 11 and 12, a bulging portion 21 bulging outward is provided, and after the ball valve body 3 is guided by the guide portion 20, It is provided in the bulging part 21 so that a movement is possible.

  A space portion S whose diameter is further expanded outward is formed on the inner wall inside the bulging portion 21, and a spindle portion 30 (to be described later) can be separated from the spindle 4 and moved through the space portion S. It has become.

Further, the space portion S is a space region in which the ball valve element 3 is accommodated and taken out from the opening 15.
Thus, the space S is formed inside the bulging portion 21, so that the ball valve body 3 is moved so as to avoid the distal end side of a detection shaft 31 (described later) protruding into the body 2, and the opening portion 15. Insertion and removal are possible.

  The ball valve body 3 is not shown, but rubber or synthetic resin, or rubber or synthetic resin is surrounded on the outside of a metal sphere (not shown), is built in the body 2 and moves through the flow path 10 with a fluid and is seated. The flow path is provided so as to be openable and closable in contact with and away from the portion 13. Since the outer diameter of the ball valve body 3 is formed larger than the inner diameter of the seating portion 13 and the outflow inlets 11, 12, the ball valve body 3 can be reliably seated on the seating portion 13. Omission is prevented.

3 to 6, the spindle 4 is rotatably supported inside the body 2 located in the vicinity of the opening 15, and the spindle 4 is connected to a detection mechanism 7 fixed to the body 2.
The spindle 4 includes a spindle portion 30 and a detection shaft 31, both of which have a divided structure as will be described later. Both are joined and separated from the opening 15 in a state where the spindle portion 30 is separated. It can be taken out.

  The spindle portion 30 is provided in a form with a paddle 32, and this spindle portion 30 is provided with an attaching / detaching side end 33 and an annular protrusion 34 to the detection shaft 31, and the attaching / detaching side end 33 is an annular protrusion. At this time, the other end side is provided with an entire length that does not contact the inner wall of the bulging portion 21. The detachable side end portion 33 of the spindle portion 30 is composed of parallel two-surface convex portions, and a reduced-diameter central shaft 35 extends from the tip side of the two-surface convex portion 33.

  The paddle 32 is provided in a flat plate shape, is integrally fixed in the centrifugal direction of the spindle portion 30 and is provided so as to be rotatable with the rotation of the spindle portion 30. The paddle 32 is provided in a length that can be pressed by the ball valve body 3 that moves along the guide portion 20, and is pressed by the ball valve body 3 when the ball valve body 3 is lifted. At this time, the spindle 30 integrated with the paddle 32 rotates, and the raising operation of the ball valve body 3 is converted into a rotational motion. This rotational motion is detected by the detection mechanism 7 via the detection shaft 31.

  On the front end side of the detection shaft 31, a two-surface concave portion 36 that can be fitted to the two-surface convex portion 33 is formed, and a hole portion 37 into which the central shaft 35 is fitted and inserted follows the two-surface concave portion 36. It is formed slightly longer than the shaft 35. Furthermore, an air vent hole 38 having an L-shaped cross section that communicates with the outside of the detection shaft 31 is formed in the hole portion 37. An annular flange 39 is formed outside the intermediate position of the detection shaft 31.

  The detection shaft 31 is inserted from the front end side into the insertion hole 41 formed in the body 2 through the O-ring 40 from the outside of the body 2. At this time, the annular flange 39 is locked to the stepped portion 42 formed in the insertion hole 41 and the position is regulated in the insertion direction, so that a part of the two-surface recess 36 protrudes to the extent that it is exposed inside the body 2 Become. In this state, a bush 50 is attached to the rear end side of the detection shaft 31.

The bush 50 shown in FIGS. 3 and 4 has a cylindrical portion 51, a hexagonal hexagonal flange portion 52 and a male screw portion 53 formed near the middle of the cylindrical portion 52, and an annular flange portion 39 of the detection shaft 31. The cylindrical portion 51 is attached to the outer periphery thereof via an O-ring 54 in a state where the tip end surface thereof is in contact with the outer periphery. Further, an operating plate 61 is mounted on the rear end portion of the detection shaft 31 in a state in which a later-described box portion 60 that houses components inside the detection mechanism 7 is mounted, and a lock nut is attached to the male screw portion 53 of the bush 50. 63 female screw parts 64 are screwed together. As described above, the annular flange 39 is sandwiched between the body 2 and the bush 50, so that the position of the detection shaft 31 is regulated in the extraction direction, and the detection shaft 31 is prevented from being displaced in the axial direction or coming outward. Is done.
The operation plate 61 is provided in an L shape and is attached to the detection shaft 31 via the attachment hole 65. Since the lock nut 63 is fixed from above, the operation plate 61 rotates integrally with the detection shaft 31.

When the lock nut 63 is tightened, the detection shaft 31 is rotatably provided on the body 2, and the spindle portion 30 is connected to the detection shaft 31.
The spindle portion 30 is connected to the detection shaft 31 by fitting the two-surface convex portion 33 to the two-surface concave portion 36 in a state where the central shaft 35 is inserted into the hole portion 37. With this connection structure, the spindle portion 30 and the detection shaft 31 can be divided, and both of them can be joined or separated from the opening 15. After the spindle unit 30 and the detection shaft 31 are connected, they can rotate together, and the state of the ball valve body 3 can be detected via the paddle 32.

  In FIG. 4, in the spindle 4 with the spindle portion 30 and the detection shaft 31, the gap T between the tip end side of the spindle portion 30 and the inner wall of the bulging portion 21 leads to the detection shaft 31 with the central shaft 35 and the two-surface protrusion 33. It is set to be slightly longer than the fitting length L.

  The paddle 32 described above is provided in a split structure with the spindle 4 so as to be detachable from the opening 15, and the opening 15 is provided in such a size that the ball valve body 3 can be attached and detached after the paddle 32 is taken out. . At this time, the take-out side of the paddle 32 is supported by the stopper member 5, and the paddle 32 can be detached from the opening 15 after removing the stopper member 5.

3 to 6, the stopper member 5 has a substantially half-moon shape that can be inserted into the opening 15 of the body 2, and is provided so as to be attachable from the opening 15. The stopper member 5 is provided so as to be accommodated in the opening 15 as a whole, and the cover 17 is attached to the body 2 from above.
Arc protrusions 70 and 71 extending in the insertion direction of the opening 15 are provided on the left and right sides of the stopper member 5, and in FIG. 4, the outer end portion (tip end) of the spindle portion 30 is provided on the inner periphery of the left arc protrusion 70. A groove-like facing surface 72 with which the portion) can abut is provided. The facing surface 72 only needs to be able to contact a part of the tip of the spindle portion 30.

On the other hand, a U-shaped notch groove 73 is formed in the right circular arc projection 71, and the vicinity of the rear end of the spindle portion 30 is inserted into the notch groove 73. In this way, the front end side and the rear end side of the spindle portion 30 are supported by the stopper member 5.
Further, the stopper member 5 is prevented from rotating with respect to the opening portion 15 by contacting the edge portion of the notch groove portion 73 with the spindle portion 30.

In FIG. 4, the thickness W at the contact position of the left arcuate protrusion 70 with the spindle 30 is slightly shorter than the gap T. Thus, by inserting the circular arc projection 70 having a thickness W between the spindle portion 30 and the inner wall of the bulging portion 21, the relationship of gap T−thickness W <fitting length L is established. During normal use after the member 5 is mounted, the concave-convex fitting between the two-surface convex portion 33 and the two-surface concave portion 36 is prevented from being removed, and the connection between the spindle portion 30 and the detection shaft 31 is reliably maintained. .
A concave latching portion 75 is formed in the string portion of the stopper member 5, and one end of the spring 6 is provided on the latching portion 75 so as to be latched.

  The spring 6 shown in FIGS. 5 and 6 includes a coil portion 80 and a torsion coil spring having arm portions 81 and 81 provided at both ends of the coil portion 80, and the spindle portion 30 is inserted into the coil portion 80. In this state, the arm portion 81 on one end side is locked to the stopper member 5 via the latching portion 75, and the arm portion 81 on the other end side is locked to the paddle 32.

  As a result, the spring 6 is provided in the body 2 while being hooked on both the spindle portion 30 and the paddle 32, and the paddle 32 (spindle portion 30) presses the ball valve body 3 against the stopper member 5. A spring that biases in the direction. When the ball valve body 3 is lifted by fluid pressure, the paddle 32 is pressed against the urging force of the spring 6 by the ball valve body 3 and is connected to the spindle portion 30 integrated with the paddle 32 and the spindle portion 30. The detection shaft 31 rotates as the spindle 4 counterclockwise in FIGS.

  The detection mechanism 7 shown in FIGS. 3 and 4 is capable of detecting flowing water into the body 2, and includes a box portion 60 for storing parts, a delay mechanism 90, microswitches 91 and 92, an extension stem 93, and a cam member 94. In addition, the above-described bush 50 and lock nut 63 are also housed therein.

  The box unit 60 includes a box case 100 for mounting components and a box cover 101 for covering, which are formed of resin and are provided in a shape that can be combined together with components mounted therein. . The box case 100 is provided with a frame 102, and the box case 100 side is attached to the body 2 with the delay mechanism 90 and various components mounted inside the frame 102.

  As shown in FIG. 8, a bag-like pocket portion 103 is formed on the outer side of the frame body 102, and a rib (not shown) projects from the pocket portion 103. In FIG. 3, a square nut 104 is inserted into the pocket portion 102, and this square nut 104 is pressed by a rib to prevent natural drop-out from the pocket portion 103. A communication hole 105 is formed at a position corresponding to the female screw 104 a of the square nut 104 of the pocket 103, and a male screw 106 a of a screw 106 is provided through the communication hole 105 so as to be screwed. On the body 2 side of the box case 100, through holes 107 and 108 are respectively drilled, and the detection shaft 31 and the extension stem 93 are detachably provided through the through holes 107 and 108.

  The box cover 101 is formed with a frame cover portion 110 that is slightly larger than the frame body 102 of the box case 100, and the frame body 102 is provided in the frame cover portion 110 so as to be fitted therein. An insertion hole 111 is formed at a position corresponding to the communication hole 105 of the box case 100 of the box cover 101.

  3, 7, and 8, the delay mechanism 90 includes an operation plate 61, a rotary damper 120, a rotation plate 121, and a weight 122. The operation plate 61, the rotating plate 121, and the weight 122 are built in the frame 102, and the rotary damper 120 is attached between the box case 100 and the body 2 or inside the frame 102.

  As described above, the operation plate 61 is integrally fixed to the rear end portion of the detection shaft 31 so as to be rotatable. The rotary damper 120 is attached at a predetermined position, and a rotational reaction force can be generated only in one direction by a highly viscous fluid via a ratchet (not shown). The rotary damper 120 is attached so as to generate a rotational reaction force in the clockwise direction of FIGS.

  The rotating plate 121 is attached to the rotating shaft 120a of the rotary damper 120 near the center by a plate retainer member 123, and is provided to be rotatable integrally with the rotating shaft 120a. One end side of the rotating plate 121 is bent at a predetermined angle, and the end side bent to the L-shape of the operating plate 61 is provided at this bent portion so as to be locked. A weight 122 is fixed to the other end of the rotating plate 121, and is provided to rotate with the weight 122 in the opposite direction when no force is applied to the rotating plate 121 from the operating plate 61. A micro switch 91 is attached to the weight 122 fixed side of the rotary plate 121 in the box case 100, and the micro switch 91 is turned on and off by the rotation of the rotary plate 121.

  The rotating plate 121 is provided so that the operating plate 61 that rotates integrally with the spindle 4 can be engaged. When the rotating plate 121 is fully closed, the rotating force of the operating plate 61 is applied to rotate against the dead weight of the weight 122. On the other hand, when the valve is opened, the weight 122 rotates in the opposite direction to that when fully closed, and can be rotated slowly via the rotary damper 120.

  In addition to the configuration of the delay mechanism 90 described above, the use of the coil unit 80 described above prevents a spring such as a tension spring or a compression spring from being provided inside the box unit 60, thereby reducing the size of the entire box unit 60. Each component of the delay mechanism 90 can be stored in the box portion 60.

  In the detection mechanism 7, when the operating plate 61 is disengaged from the rotating plate 121 and the rotating plate 121 rotates in the return direction of the rotary damper 120, the rotating plate 121 turns on the micro switch 91 to turn on a predetermined value. The detection opening degree is detected.

  The extension stem 93 is connected to a position facing a stem 131 of a ball disc 130 of the control valve 8 to be described later, and is provided to be rotatable integrally with the ball disc 130 by the rotation of the stem 131. The distal end side of the extension stem 93 extends to the inside of the box portion 60, a cam member 94 is fixed to the distal end portion, and a micro switch 92 is provided at the operating position of the cam member 94. When the cam member 94 rotates together with the extension stem 93, the rotation state is provided by the microswitch 92 so that the rotation state can be detected. For convenience of explanation, FIG. 8 shows a state in which the control valve 8 is fully closed and the microswitch 92 is turned on.

  The base 95 is attached to the outside of the frame 102 and is provided so as to be able to control the on / off state of the microswitches 91 and 92 and the open / closed state of the control valve 8. Since the base 95 is attached in a state of being exposed to the outside of the frame body 102 as described above, external terminals (not shown) can be connected to the terminals of the base 95.

  After the delay mechanism 90 is provided in the box case 100, when the box cover 101 is attached to the box case 100, the frame body 102 is temporarily fitted so as to be fitted into the frame body covering portion 110, and then communicated from the insertion hole 111. The box case 100 and the box cover 101 can be integrated by screwing the screw 106 into the square nut 104 through the hole 105. With this configuration, the frame body 102 and the frame body covering portion 110 can be firmly fixed by the single screw 106 and the square nut 104 while being positioned.

  At this time, since the female screw 104a side is made of a metal square nut 104, the screw 106 is repeatedly attached and detached according to maintenance or the like without being easily scraped or damaged as in the case of forming the female screw directly on the resin. Even in this case, a strong fastening force between the female screw 104a and the male screw 106a can be maintained.

  Since the square nut 104 is fitted into the pocket 103 by press fitting, it can be easily manufactured as compared with the case where a female screw is provided with a metal insert, and the press fitting space for the insert is not required. Can also be achieved. Since the square nut 104 can be incorporated in the box case in advance, the square nut 104 can be prevented from being dropped or lost when the box cover 101 is attached / detached, and the square nut 104 can be positioned by simply tightening the screw 106 from the insertion hole 111. It can be screwed securely without need.

  The control valve 8 is provided on the primary side of the ball valve body 3 in the form of a ball valve, and includes a ball disc 130, a stem portion 131, an extension stem 93, a ball seat 132, and an insert 133.

  In the control valve 8, the ball disc 130 is provided so as to be able to be inserted into the inlet 11 of the body 2, and ball seats 132 and 132 are mounted on the primary and secondary sides of the ball disc 120. The ball sheet 132 is provided by a fluororesin such as PTFE (polytetrafluoroethylene), for example, and the primary ball sheet 132 is attached in the body 2 via the insert 133, and the secondary ball sheet 132 is It is attached to a notch-shaped mounting groove 134 formed in the body 2.

  The insert 133 is provided in a substantially annular shape, and a male screw portion 133a that is screwed into a female screw portion 11a formed in the inflow port 11 of the body 2 is formed on the outer periphery thereof. On the side end surface of the insert 133, a tool engaging concave groove 135 is formed for gripping the insert 133 when the body 2 is screwed. This concave groove 135 is illustrated when the apparatus main body 1 is connected by piping. It is set to a depth that will not be covered by the flanges and gaskets of pipes that do not. For this reason, the cavity 2a in the body 2 communicates with the flow path 10 through the concave groove 135, and the fluid pressure in the flow path 10 passes through the communication flow path 136 formed at a position related to the cavity 2a and the flange portion. Can be detected by a pressure gauge (not shown). The pressure gauge is attached so as to be able to measure the pressure on the primary side and the secondary side of the ball valve body 3, and by measuring the pressure, the load condition of a predetermined water pressure on both the primary and secondary sides required for water discharge of the sprinkler It is possible to check for fluid leakage during maintenance.

  As shown in FIG. 9, a lever handle 150 is attached to the stem portion 131 of the control valve 8, and the ball disc 120 is rotatably provided by the lever handle 150. As a result, the flow path to the secondary ball valve element 3 side can be opened and closed. For example, the flow path is shut off after completion of fire extinguishing by a sprinkler (not shown) or when water is stopped during inspection of the sprinkler. Can be.

Next, the effect | action in the said embodiment of the flowing water detection apparatus of this invention is demonstrated.
In the apparatus main body 1 described above, the spindle 4 having the paddle 32 is directly pivotally supported inside the body 2 from the detection mechanism 7 fixed to the body 2. Thus, the entire apparatus body 1 can be made compact.

  In FIG. 2, the spindle 4 includes a spindle part 30 having a divided structure and a detection shaft 31. The spindle part 30 is separated from the opening 15 in a state where the spindle part 30 is separated. From this, without removing the detection mechanism 7 and the detection shaft 31 from the body 2, the two-surface convex portion 33 and the two-surface concave portion 36 can be easily connected to the detection shaft 31, and the spindle portion 30 can be easily connected. You can divide and perform maintenance. In addition to the structure in which the spindle portion 30 and the detection shaft 31 are integrally rotated by this concave / convex fitting, the spindle portion 30 and the detection shaft 31 are aligned by inserting the center shaft 35 into the hole portion 37. Can be connected with high accuracy.

  When the center shaft 35 is inserted, the air in the hole portion 37 is extracted from the air vent hole 38 to the outside, so that the center shaft 35 can be reliably inserted to a predetermined position behind the hole portion 37 while suppressing insertion resistance due to residual air. . For this reason, there is no possibility that a vibration due to insufficient insertion of the central shaft 35 occurs.

  With the above connection structure, the rotation of the spindle portion 30 that is rotated by the ball valve body 3 via the paddle 32 is not affected by the combination accuracy of the body 2 and the cover 17, and the detection shaft 31 and the operation plate 61 are not affected. The open / closed state of the flow path 10 can be detected by transmitting to the micro switch 91 via the above.

  As shown in FIG. 4, the space portion S is provided on the inner wall of the bulging portion of the body 2, and the gap T is set slightly longer than the fitting length L. The spindle portion 30 can be extracted from the detection shaft 31 until the fitting with the two-surface recess 36 is released, and the spindle portion 30 can be detached from the opening portion 15 while being inclined in the space S. For this reason, the spindle part 30 can be attached and detached without contacting the inside of the body 2.

Since the space portion S is a space region for storing and removing the ball valve body 3 from the opening 15, the ball valve body 3 is attached to the guide portion 20 in a state where the spindle portion 30 is removed from the detection shaft 31. If the ball valve body 3 is shifted along the space S side, the ball valve body 3 can be smoothly attached and detached from the opening 15, and the inside of the ball valve body 3 and the body 2 can be maintained.
Since the space portion S is provided in the bulging portion 21 of the body 2 in this way, the opening 15 can be secured large without securing a long space between the surfaces of the body 2, contributing to the compactness of the apparatus body 1. Yes.

  4 to 6, the stopper member 5 is mounted from the opening 15, the front end side of the spindle portion 30 is brought into contact with the opposed surface 72 of the arc projection 70 of the stopper member 5, and the arc projection 71 is notched. Since the rear end side is inserted into the groove portion 73, the spindle portion 30 is rotatably supported in a state in which the stopper member 5 prevents the front end side and rear end side swings, and the spindle portion 30 and the detection portion 31 are supported. Can be rotated with high accuracy in a concentric state. After the stopper member 5 is mounted, the rotation of the stopper member 5 is prevented by the insertion of the spindle 4 into the notch groove portion 73, so that the spindle portion 30 is prevented from tilting in the axial direction, and the paddle 32 with respect to the flow path 10 is The parallel state is maintained, and the ball valve body 3 that presses the paddle 32 is smoothly transmitted to the rotational motion without hindering the raising operation.

  A spring 6 is provided inside the body 2 while being hooked on both the stopper member 5 and the paddle 32, and the paddle 32 is urged in the pressing direction of the ball valve body 3 by the spring 6, so that There is no need to provide a spring for urging the paddle 32 toward the ball valve body 3, and therefore there is no need for a portion in the box case 100 that supports the spring force of the spring. The number of points can be reduced and the size can be reduced.

  Since the spring 6 is a torsion coil spring, the arm portion 81 at one end is locked to the stopper member 5 and the arm portion 81 at the other end is locked to the paddle 32, so that the coil portion 80 is mounted on the spindle portion 30. Both arm portions 81 can be easily hooked and attached without applying a force in the compression direction or the bullet direction. The torsion coil spring 6 can smoothly bias the paddle 32 toward the ball valve body 3 without applying a rotational force to the stopper member 5.

  The embodiment of the present invention has been described in detail above, but the present invention is not limited to the above-described embodiment, and the scope does not depart from the spirit of the invention described in the claims of the present invention. Thus, various changes can be made.

DESCRIPTION OF SYMBOLS 1 Apparatus body 2 Body 3 Ball valve body 4 Spindle 5 Stopper member 6 Torsion coil spring (spring)
DESCRIPTION OF SYMBOLS 7 Detection mechanism 10 Flow path 11 Inlet 12 Outlet 13 Seating part 15 Opening part 20 Guide part 21 Swelling part 30 Spindle part 31 Detection shaft 32 Paddle S Space part (space area)

Claims (7)

  In the body having an inflow port and an outflow port, a seat portion on which the ball valve body is seated, an opening portion to be covered, and a guide portion on which the ball valve body is raised by fluid pressure are provided, A spindle having a paddle for converting the ascending operation of the ball valve element into a rotational motion is rotatably supported inside the body located in the vicinity of the opening, and the spindle is fixed to the body. A flowing water detection device characterized by being connected to the water.   The spindle includes a spindle portion with a paddle and a detection shaft, both of which have a divided structure, and the spindle portion is separated from the opening, and both are joined and separated and can be taken out. Item 10. The flowing water detection device according to Item 1.   The flowing water detection device according to claim 2, wherein a space portion that is moved to separate the spindle portion is provided on an inner wall of the bulging portion of the body.   The flowing water detection device according to claim 3, wherein the space portion is a space region in which the ball valve body is accommodated and taken out from the opening.   The water flow detection device according to any one of claims 1 to 4, wherein a stopper member is mounted in the opening, and the stopper member supports the spindle portion.   A spring that is hooked on both the stopper member and the paddle is provided inside the body, and the spring is a spring that urges the paddle in the pressing direction of the ball valve body. The flowing water detection device according to claim 1.   The flowing water detection device according to claim 6, wherein the spring is a torsion coil spring, and one end of the torsion coil spring is locked to the stopper member, and the other end is locked to the paddle.

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