JP4106372B2 - Water flow detector for fire fighting equipment - Google Patents

Description

  The present invention relates to a water flow detection device for fire extinguishing equipment suitable for use in sprinkler equipment such as office buildings, apartment houses, and hotels.

  Conventionally, as shown in FIG. 17, a general office building sprinkler facility is provided with a plurality of sprinkler heads 2 for each floor of the office building, and each head 2 is connected to the water flow detection device via the sprinkler pipe 3 on each floor. 11 and a fire-extinguishing water pipe 4 is connected to the primary side of the water flow detection device 11, and each pipe 4 is disposed on the basement of an office building. It is connected to a water storage tank 7 through a holding pump 6. The pipe 4 is connected to a pressure tank 8 and a pressure switch 9 that can detect a pressure drop in the pipe 4 via the pressure tank 8. In the figure, reference numeral 10 denotes an auxiliary water tank for fire extinguishing water disposed on the roof.

  In the sprinkler facility, all the piping is filled with water during a warning operation, and static pressure (0.1 MPa or more at the farthest point from the pressure pump 5) is applied by the pressure holding pump 6, When a fire occurs in the area R, the nozzle of the sprinkler head 2 ′ automatically fires due to heat, and fire extinguishing water filling the pipe 3 ′ is discharged from the head 2 ′. The reed switch and the like of the flowing water detection device 11 is turned on, thereby generating a fire alarm or the like.

  Further, the pressure switch 9 detects that the pressure in the pipe is lowered due to the firing of the head 2 ′ and is turned on. The pressurized water pump 5 is activated based on the turn-on, and the fire extinguishing water in the water tank 7 is placed in the pipe 4. Is supplied under pressure, and fire extinguishing water is subsequently discharged from the sprinkler head 2 'to perform fire extinguishing activities.

  Conventionally, devices as shown in Patent Documents 1 and 2 have been proposed as the flowing water detection device in such sprinkler equipment.

  The flowing water detection device of Patent Document 1 is provided with a paddle-type flowing water detection unit on the primary side of the check valve, and the flowing water pressure from the primary side to the secondary side of the check valve accompanying the decrease in the secondary pressure. Is detected by a paddle on the primary side, and a detection signal is issued by the detection unit.

  The flowing water detection device of Patent Document 2 is provided with a paddle-type flowing water detection unit on the secondary side of a so-called two-step valve (pre-acting valve). The flowing water pressure is detected by the paddle on the secondary side.

JP 2003-149021 A (FIGS. 1 and 2) JP2003-290382A (FIGS. 1 and 2)

  By the way, the thing of the said patent document 1 needs to provide the introductory pipe part for accommodation of a flowing water detection paddle in the primary side of a non-return valve main body, and, thereby, the size of a non-return valve main body enlarges, and a flowing water detection apparatus There is a problem that it is difficult to downsize itself.

  In Patent Document 2, it is necessary to provide a pipe for installing a flowing water detection paddle on the secondary side of the two-step valve. As in Patent Document 1, the entire size of the detection device is increased and the size of the detection apparatus is reduced. There is a problem that it is difficult.

  Moreover, as a flowing water detection apparatus, the structure is required to be as simple as possible in response to requests for downsizing, prevention of malfunctions, ease of maintenance, and the like.

  The present invention has been made in view of the above-described conventional problems, and an object thereof is to provide a water flow detection device for fire extinguishing equipment that has a simple structure and can be easily downsized.

In order to achieve the above object, the present invention
First, there is a water flow detection device for a fire extinguishing facility that detects a water flow by operating a water flow detection paddle with a water flow from a primary side to a secondary side in the check valve housing. In the secondary valve chamber, a paddle that can be rotated by the water flow is supported at a position outside the peripheral edge of the valve body constituting the check valve, and the paddle is rotated without the paddle surface overlapping the valve body. A flowing water detection switch that is disposed so that its end is positioned close to the side edge of the valve body, and that is provided with a switch operating member on the side opposite to the rotating end of the paddle and that can be driven by the switch operating member And the water flow detection switch is driven by the movement of the switch operating member based on the rotation of the paddle.

  The rotation end of the paddle refers to a rotation tip portion along a center line (n) orthogonal to the rotation axis of the paddle (20). Therefore, when the valve element (16) is opened based on the occurrence of a fire or the like and a water flow from the primary side to the secondary side occurs, the paddle (20) is rotated by the water flow, and the switch operation member detects the water flow. The switch can be turned on.

  Secondly, the paddle is disposed at a position where the pivot end thereof is close to the pivot end of the valve body. Composed.

  The rotation end of the valve body refers to a rotation tip portion along a center line (m) orthogonal to the rotation support shaft (17a) of the valve body (16). If comprised in this way, since the rotation end (20 ') of a paddle (20) will be located in proximity to the rotation end (16') at the time of opening of a valve body (16), at the time of opening of a valve body (16) Can be efficiently guided to the paddle (20).

  Third, an attachment hole is provided in the valve housing wall surface of the secondary valve chamber, a paddle support is attached to the attachment hole, a support arm is rotatably attached to the support, and the valve of the support arm is mounted. The first pad is provided with the paddle at one end on the chamber side, the switch operating member at the other end of the support arm, and the water flow detection switch outside the valve housing. Or it is comprised by the flowing water detection apparatus for fire extinguishing facilities of 2 description.

  If comprised in this way, it becomes possible to unitize a paddle (20) and a flowing water detection switch (22) centering on a paddle support body (18 grade | etc.), The said unit can be reduced in size, and a flowing water detection apparatus is made compact. Can be configured.

  Fourthly, the water flow guide member for guiding the water flow from the primary side to the secondary side when the valve body is opened is provided on the back surface of the valve body in the direction of the paddle. It is comprised by the flowing water detection apparatus for fire extinguishing facilities in any one of -3.

  Fifth, the water flow guide member includes a water flow guide plate that protrudes from the back surface of the valve body to the primary water flow path side, and the water flow guide plate guides the water flow in the paddle direction. It is comprised by the flowing water detection apparatus for fire extinguishing facilities of the said 4th characteristic.

  With this configuration, the water flow can be guided to the paddle more efficiently by the water flow guide member (24 or the like).

  In addition, although the code | symbol in embodiment was shown in parenthesis corresponding to the structure of this invention, this is displayed for convenience in order to clarify the correspondence, Comprising: The structure of this invention is in embodiment. The configuration is not limited.

  According to the present invention, since the structure is simple, failures and malfunctions can be reduced as much as possible, and a water flow detection device for fire extinguishing equipment with good maintainability can be realized.

  In addition, since the rotating end of the running water detection paddle is provided close to the periphery of the valve body, it is possible to operate the paddle with a small flow rate, thereby reducing the area of the running water detection paddle. It is possible to reduce the size of the detection device itself.

  Moreover, a highly sensitive water flow detection apparatus is realizable by providing a water flow guide member in the back surface of a valve body.

  Hereinafter, an embodiment of a running water detection device for fire extinguishing equipment according to the present invention will be described in detail.

1 and 2 show a water flow detection device 11 according to the first embodiment, and 11a is a valve housing as a check valve housing, which is secondary from the primary side A (water tank 7 side). A flowing water path (in the direction of arrow C) toward the side B (sprinkler 2 side) is formed, and the primary-side flowing water path 12 has a primary-side mounting flange 12a for connecting to the primary-side pipe 4 and a secondary-side flowing water. A secondary-side mounting flange 13 a for connecting to the secondary-side pipe 3 is formed in the path 13.

  A horizontal valve seat 14 is formed in the opening 12b on the valve chamber 11a ′ (secondary valve chamber) side of the primary-side flowing water passage 12, and a sealing O-ring 15 is embedded in the valve seat 14. It is.

  Reference numeral 16 denotes a circular valve body as a check valve body capable of opening and closing the opening 12b from the secondary side, and 17 and 17 (see FIG. 3) a boss part disposed opposite to the inner wall of the secondary side valve chamber 11a '. A support shaft 17a for supporting the valve element is pivotally supported between the boss portions 17 and 17. The valve body 16 is pivotally supported by the support shaft 17a with its arms 16a and 16a so that the valve body 16 can be opened and closed. As shown in FIG. 1, the valve body 16 has an O-ring of the opening 12b. 15 is configured to be able to take a valve closed state in close contact with 15 and a valve open state in which the opening 12b is opened by rotating in the direction of arrow D by the water flow from the primary side to the secondary side.

  Reference numeral 18 denotes a paddle support, which is fitted in a water-stopped state in a mounting hole 19 provided in a wall surface of the secondary side valve chamber 11a 'opposite to the support shaft 17a. On this paddle support 18 (see FIG. 4), the support arm 20a of the running water detection paddle 20 is rotatably supported by a support shaft 21 orthogonal to the arm 20a with its central bent portion k. Yes. A flowing water detection paddle 20 is connected to one end of the support arm 20a on the valve chamber 11a ′ side, and an upper bent portion extending from the support shaft 21 toward the outside of the valve housing 11a contacts a movable contact piece 23b described later. A rod-like switch operation member 20a ′ is formed. The support arm 20a as a whole has a "<" shape with the central bent portion k as the center (FIG. 4).

  The movable contact piece 23b is in elastic contact with the end of the switch operating member 20a ', and the support arm 20a itself is always urged to rotate slightly in the direction of arrow E by the elastic force of the movable contact piece 23b. Thus, the lower portion of the support arm 20a is normally configured to maintain a state where the lower portion of the support arm 20a is in contact with a stopper member 18a projecting from the front surface of the paddle support 18. The paddle 20 is configured to be in the horizontal state shown in FIGS. 1 and 4 when the support arm 20a is in a rotationally biased state in which the support arm 20a is in contact with the stopper member 18a. In FIGS. 4 and 5, G1 and G2 are water-stopping rubber packings.

  Here, if the center line of the valve body 16 orthogonal to the support shaft 17a of the valve body 16 is m (FIG. 3), the rotation tip of the valve body 16 along the center line m is the rotation end 16. The peripheral edge of the valve body 16 is indicated by reference numeral 16 ". Further, when the center line of the paddle 20 perpendicular to the support shaft 21 of the paddle is n, the rotation of the paddle 20 along the center line n is referred to as'. The moving tip is referred to as a rotating end 20 ′ (FIG. 3).

  The flowing water detection paddle 20 has a substantially rectangular shape that is horizontally long in the left-right direction (see FIG. 3), and is fixed to the tip of the support arm 20a. The paddle 20 is in the horizontal state shown in FIG. 1, and the rotation end 20 ′ of the valve body 6 is not in contact with the rotation end 16 ′ of the valve body 16. A small gap t is provided between “and the rotating end 20” (FIG. 1). That is, the paddle 20 is supported (supported) at a position outside the peripheral edge of the valve body 16, and the paddle surface of the paddle 20 is not overlapped with the valve body 16, and the rotating end 20 ′ is the valve element 16. It arrange | positions so that it may become a position close | similar to the side edge of the body 16 (in the case of FIG. 1, rotation end 16 ').

  The flowing water detection paddle 20 is in the above rotation energized state, that is, as shown in FIG. 1, the valve chamber 11a ′ around the opening 12b in the fire alarm state filled in the valve housing 11a. It is supported in a horizontal state along the horizontal step portion 12b ′ on the side, and in this state, the installation position of the paddle 20 is disposed so as to be slightly above the upper surface position of the valve body 16. As a result, the small space S is formed and arranged on the lower side of the paddle 20 and the upper side of the horizontal step portion 12b '. With such a configuration, the rotation operation (in the direction of arrow D) of the valve body 16 in the opening direction can be performed without the rotation end 16 ′ contacting the paddle 20.

  Reference numeral 22 denotes a flowing water detection switch as a fire alarm switch, which is connected and fixed to the outside of the valve housing 11 a of the paddle support 18. The flowing water detection switch 22 has a fixed contact piece 23a and a movable contact piece 23b made of an elastic plate having an upper end q fixed (FIG. 4), and the movable contact piece 23b is the switch operating member 20a. By making contact with ', a rotational biasing force in the direction of arrow E is applied to the paddle 20. The switch 22 is configured such that the movable contact piece 23b is fixed by the operation member 20a ′ when the paddle 20 is rotated in the direction of arrow F by the flowing water pressure from the primary side A to the secondary side B of the valve body 11. It is configured to be pressed to the contact piece 23a side so as to come into contact with the contact piece 23a (the state shown in FIG. 5).

  When the water flow pressure to the paddle 20 is de-energized, for example, when the water flow is stopped, the movable contact piece 23b is elastically restored and separated from the fixed contact piece 23a to be turned off. At this time, the paddle 20 is rotated and biased in the direction of arrow E by the elastic return force of the movable contact piece 23b, and the support arm 20a is in contact with the stopper member 18a (the state shown in FIGS. 1 and 4). Return to.

  Since the flowing water detection device for fire extinguishing equipment according to the present invention is configured as described above, its operation will be described next.

(1) Fire warning state The running water detection device 11 according to the present invention is arranged on each floor of the office building shown in FIG. 17, the primary side pipe 4 is connected to the primary side flange 12a, and the secondary side flange 13a is connected to the secondary side. A sprinkler pipe 3 as a pipe is connected, and the pipes 4 and 3 and the flowing water detection device 11 (in the valve housing 11a) are filled with fire-extinguishing water. Is maintained in a fire alarm state where 0.1 MPa or more is applied.

  In this fire alarm state, as shown in FIG. 1, the valve body 16 is in a closed state, and the running water detection paddle 20 is also in the horizontal state in the figure, and a space S is formed below the paddle 20. Has been.

(2) Operation when a fire occurs In such a fire alarm state, when a fire occurs in, for example, the area R of FIG. 17 and a specific sprinkler head 2 (for example, the sprinkler head 2 ′) fires, the sprinkler piping The fire extinguishing water filled in 3 ′ is discharged from the sprinkler head 2 ′, whereby the secondary pressure of the flowing water detection device 11 decreases, and the flowing water detection device 11 starts from the primary side based on the pressure drop. A water flow (arrow C direction) to the secondary side is generated.

  That is, the valve body 16 in the valve housing 11a rotates in the direction of the arrow D without contacting the paddle 20 due to the decrease in the secondary side pressure, and the secondary side from the primary side water flow path 12 through the valve chamber 11a ′. A water flow is generated in the direction of the side flow path 13 (arrow C direction).

  At this time, when the valve body 16 rotates (opening operation) with the support shaft 17a as a fulcrum, the valve body 16 rotates at the initial stage (the position of the solid line of the valve body 16 in FIG. 2 and the opening angle θ). Water flows from the position near the moving end 16 'through the space S below the paddle 20 to the secondary water flow path 13 side (see arrow G in FIG. 5), and the paddle 20 moves in the direction of arrow F due to the pressure of the water flow. To turn. At this time, since the paddle 20 is located close to the rotating end 16 ′ where the opening angle of the valve body 16 is large, the flow rate from the primary side A to the secondary side B is lower in the space below the paddle 20. It becomes large in the vicinity of S, and the paddle 20 can be efficiently operated by the water flow passing through the space S.

  When the paddle 20 is rotated in the direction of arrow F, the movable contact piece 23b of the alarm switch 22 is pushed by the operation member 20a ′ to come into contact with the fixed contact piece 23a (see FIGS. 2 and 5). The switch 22 is turned on. Therefore, when the running water detection switch 22 is turned on, an alarm device (not shown) is activated to sound an alarm sound, so that a resident can be informed that a fire has occurred. The valve body 16 is rotated to the position indicated by a two-dot chain line in FIG. 2 by the flow rate from the primary side A to the secondary side B, but the ON operation of the switch 22 by the paddle 20 is the initial opening of the valve body 16. The operation is performed (for example, the opening angle θ at the solid line position of the valve body 16 in FIG. 1).

  Further, the pressure drop of the pipes 3 and 4 due to the firing of the sprinkler head 2 'is detected by the pressure switch 9 via the pressure tank 8, and the pressurized water pump 5 is driven based on the detection, thereby continuing. The fire extinguishing water in the water storage tank 7 is pressure-fed into the pipe 4, and the supplied fire extinguishing water is continuously discharged from the sprinkler head 2 ′ through the opened valve body 16 and the fire extinguishing operation is continued.

  When the fire extinguishing operation is finished and the water flow in the valve housing 11a is deenergized, the paddle 20 is rotated and returned in the direction of arrow E by the urging force of the movable contact piece 23b, so that it contacts the stopper member 18a. It returns to the contacted horizontal state.

  Thus, in the water flow detection device for fire extinguishing equipment according to the present invention, the rotation end 20 ′ of the paddle 20 for water flow detection is provided at the rotation end 16 ′ of the valve body 16 in the secondary valve chamber 11a ′. Since the flowing water detection paddle 20 is provided so as to be close to each other, the valve body 16 itself does not need to be provided with the flowing water detection paddle 20, and the valve body 16 and the paddle 20 are not in contact with each other. The pressure loss of the valve body 16 due to can be almost eliminated.

  Further, since the paddle 20 for detecting the flowing water is provided close to the rotating end 16 'of the valve body 16, the paddle 20 can be operated with a small flow rate, thereby the area of the paddle 20 for detecting the flowing water itself. The pressure loss for operating the paddle can be made extremely small.

  Further, the flowing water detection device according to the present invention has a mounting hole 19 penetrating the side wall of the secondary valve chamber 11a ′ of the valve housing 11a used as a normal check valve, and the above-mentioned through the mounting hole 19. Since the running water detection paddle 20, the paddle support 18 and the running water detection switch 22 can be configured as shown in FIG. 1, a connecting pipe and a valve housing for installing the running water detection paddle and the alarm switch are provided. It is not necessary to separately provide the water flow detection device, and thus the flowing water detection device itself can be configured to be extremely small.

  In addition, since the mechanism for detecting flowing water including the paddle can be made extremely small in this way, units such as the paddle 20 and the paddle support 18 can be installed in the existing check valve housing.

  FIG. 6 shows another embodiment of the flowing water detection paddle 20 in the first embodiment. The rotating end 20 ′ of the paddle 20 is replaced with the rotating end 16 ′ of the circular valve body 16. It is a concave arc shape along. Thus, by making the rotation end 20 ′ of the paddle 20 into a concave arc shape along the circular valve body 16, the peripheral edge of the valve body 16 on the side of the rotation end 16 ′ and the rotation end 20 ′ of the paddle 20. Can be further reduced. As a result, the paddle 20 can more efficiently receive the water flow generated from the primary side A to the secondary side B when the valve body 16 is opened, and the operating sensitivity of the paddle 20 can be further improved.

  FIG. 7 shows still another embodiment of the running water detection paddle 20 in the first embodiment, and the mounting positions of the paddle 20 and the running water detection switch 22 on the valve housing 11a are shown in FIG. It is moved 90 degrees with respect to the embodiment of FIG. That is, the paddle 20 is provided at a position orthogonal to the rotation end 16 ′ of the valve body 16. In this case, when the valve body 16 is opened, the paddle 20 exists at a position (orthogonal position) moved 90 degrees from the rotating end 16 ′ side of the valve body 16, but from the opening 12 b to the valve body 16. The paddle 20 can be similarly operated by the water flow from the vicinity of the peripheral edge 16 ″ perpendicular to the rotating end 16 ′ toward the secondary side B.

  Further, from the viewpoint of improving the sensitivity of the paddle 20, the mounting position of the paddle 20 and the flowing water detection switch 22 is a position corresponding to a portion having a large opening area associated with the opening of the valve body 16, that is, the rotation of the valve body 16. Although it is preferable to be provided at a position facing the end 16 ′ (the position in FIG. 6), in the configuration of the flowing water detection device according to the present invention, the rotating end 20 ′ of the paddle 20 is close to the peripheral edge 16 ″ of the valve body 16. Therefore, the paddle 20 can be operated with a small flow rate. Therefore, the mounting position of the paddle 20 is located in the vicinity of the support shaft 17a of the valve body 16 in the secondary valve chamber 11a ′. Any position corresponding to the peripheral edge 16 "can be attached.

  8 and 9 show a second embodiment of the water flow detection device according to the present invention, in which a water flow guide member 24 (FIG. 13) is provided on the lower surface of the valve body 16. . In the second embodiment, the configuration other than the water flow guide member 24 is the same as that of the first embodiment. Therefore, the same parts as those of the first embodiment are denoted by the same reference numerals, and for convenience, the same parts are provided. Description is omitted.

  When the valve element 16 is opened by the water flow from the primary side A to the secondary side B, the water flow guide member 24 allows the water flow flowing from the temporary side A to the secondary side B to be transmitted to the paddle 20 side (the space S side). ) (See arrow G ′ in FIG. 12), the open / close sensitivity of the paddle 20 is further improved.

  As shown in FIG. 13, the water flow guide member 24 has a trapezoidal substrate 24a and a pair of water flow guide plates 24b having the same shape formed by bending the left and right side edges of the substrate 24a downward at a substantially right angle. 24b. These water flow guide plates 24b, 24b are formed so that the vertical width gradually increases from the lower side 25 of the long side of the substrate 24a to the upper side 26 of the short side. Yes. By configuring the widths of the water flow guide plates 24b and 24b in this way, the water flow guide plates 24b and 24b even when the valve body 16 is slightly opened (angle θ degrees) as shown in FIG. 9, for example. Since the lower edge 24b 'can maintain the horizontal state, the water flow can be effectively guided toward the paddle 20 even in the opened state.

  As shown in FIG. 10, the water flow guide member 24 is fixed to the back surface of the valve body 16 by two spot welds P with the upper side 26 facing the paddle 20. The interval between the guide plates 24b, 24b is configured to gradually narrow toward the paddle 20 direction.

  Since the flowing water detection device (second embodiment) according to the present invention is configured as described above, its operation will be described next. In the fire alarm state, as in the first embodiment, the inside of the valve housing 11a is filled with water, and the valve body 16 is closed as shown in FIG. The horizontal state of FIG. 5 is maintained, and a space S is formed below the paddle 20.

  In this fire warning state, as in the first embodiment, for example, when a fire occurs in the area R of FIG. 16 and a specific sprinkler head 2 (for example, the sprinkler head 2 ′) fires, the sprinkler pipe 3 The fire extinguishing water that has been filled in is discharged from the sprinkler head 2 ′, whereby the secondary pressure of the flowing water detection device 11 is reduced, and the flow detection device 11 starts from the primary side A based on the pressure drop. A water flow (in the direction of arrow C) to the secondary side B is generated.

  When the valve body 16 rotates (opening operation) with the support shaft 17a as a fulcrum, the secondary side flowing water path passes through the space S below the paddle 20 from the position near the rotation end 16 'of the valve body 16. A water flow is generated on the side 13 (see arrow C in FIG. 8), and the paddle 20 is rotated in the direction of arrow F by the pressure of the water flow. In the initial operation of the opening operation of the valve body 16 (for example, in the process of opening the valve body 16 to the angle (about θ degrees) in FIG. 9), the water flow generated in the direction of the valve body 16 from the primary flow path 12 is On the lower surface of the valve body 16, it is guided in the direction of the paddle 20 (direction of the space S) by the water flow guide plates 24b, 24b of the water flow guide member 24 (arrow G ′ in FIG. 12). That is, the water flow generated in the direction of the valve body 16 is concentrated in the direction of the paddle 20 by the water flow guide plates 24b and 24b that gradually narrow the interval toward the paddle direction, and effectively the space below the paddle. Guided in the S direction. Therefore, even when the opening angle of the valve body 16 is small with a small flow rate, the paddle 20 can be effectively operated.

  When the paddle 20 is rotated in the direction of arrow F, the movable contact piece 23b of the flowing water detection switch 22 is pushed by the switch operating member 20a 'to come into contact with the fixed contact piece 23a, thereby turning on the flowing water detection switch 22. Therefore, when the switch 22 is turned on, an alarm device (not shown) is activated and an alarm sound is generated, so that a resident can be informed that a fire has occurred. Subsequent operations are the same as those in the first embodiment.

  Thus, in the flowing water detection apparatus (2nd Embodiment) which concerns on this invention, while being able to show | play the effect similar to the said 1st Embodiment, by the water flow guide member 24 provided in the valve body 16 back surface, it is a primary side. The water flow flowing from A to the secondary side B can be effectively guided in the direction of the paddle 20, and the flowing water detection paddle 20 can be reliably operated with a smaller flow rate.

  FIG. 14 shows another embodiment of the paddle 20 in the second embodiment. As in FIG. 6 of the first embodiment, the rotating end 20 ′ of the paddle 20 is formed in the circular shape. A concave arc shape along the periphery (rotating end 16 ′) of the valve body 16 is used. Thus, by making the front end side edge 20 ′ of the paddle 20 into a concave arc shape along the periphery of the circular valve body 16, the paddle 20 is changed from the primary side A to the secondary side B when the valve body 16 is opened. The generated water flow can be received more efficiently, and the sensitivity of the paddle 20 can be further improved in combination with the action of the water flow guide member 24.

  FIG. 15 (a) shows still another embodiment of the paddle 20 in the second embodiment, and the mounting positions of the paddle 20 and the flowing water detection switch 22 on the valve housing 11a are shown in FIG. It is moved 90 degrees with respect to the form. That is, the paddle 20 is provided at a position orthogonal to the rotation end 16 ′ of the valve body 16. In this case, when the valve body 16 is opened, the paddle 20 can be operated by a water flow from the vicinity of the peripheral edge 16 ″ perpendicular to the rotation end 16 ′ of the valve body 16 toward the secondary side B from the opening 12b. it can.

  FIG. 15 (b) shows the water flow guide member 27 in this case, and this water flow guide member 27 is provided at a substantially right angle from a triangular substrate 27 a and two adjacent sides of the substrate 27 a downward. The water flow guide plates 27b and 27c are formed such that the width in the vertical direction gradually increases toward the apex r side of the substrate 27b. By configuring the vertical widths of the water flow guide plates 27b and 27c in this way, for example, when the valve body 16 is slightly opened (angle θ) as shown in FIG. 9, it is the same as in the first embodiment. Since the lower edges 27b ′ and 27c ′ of the water flow guide plates 27b and 27c are in a substantially horizontal state, the water flow can be efficiently guided toward the paddle 20 in the initial stage of the opening operation of the valve body 16.

  As shown in FIG. 15 (a), the water flow guide plate 27 has one side on which the water flow guide plates 27b and 27c are not formed directed toward the paddle 20 and the water flow guide plate. 27b is fixed to the back surface of the valve body 16 by spot welding P at two locations in a state in which 27b is substantially parallel to the longitudinal direction of the paddle 20. By fixing the water flow guide plate 27 to the back surface of the valve body 16 in such a direction, the water flow guide plates 27b and 27c allow the water flow flowing from the primary side A to the bottom surface of the valve body 16 to be rotated by the valve body 16. It can be guided and concentrated in the direction of the paddle 20 by guiding in the direction orthogonal to the moving end 16 ′.

  Thus, even when the flowing water detection paddle 20 is attached in a direction orthogonal to the rotation end 16 ′ of the valve body 16, the water flow is effectively guided in the direction of the paddle 20, and the paddle 20 The operating sensitivity of 20 can be improved.

  Also in the second embodiment, the flowing water detection paddle 20 is attached at the peripheral edge 16 "excluding the position near the support shaft 17a of the valve body 16 on the inner wall of the valve housing 11a (in the valve chamber 11a '). In this case, the water flow guide plates 27b and 27c may be configured to effectively guide the water flow to the paddle 20 at the attachment position. Further, the water flow guide member 27 is configured to guide the water flow from the primary side A to the secondary side B to the paddle 20, so that the paddle can be attached at any position corresponding to the peripheral edge 16 ″ of the valve body 16. In addition, a highly sensitive water flow detection device can be configured.

  FIG. 16 shows a third embodiment of the flowing water detection device according to the present invention. In the mounting hole 19, the support arm 20a of the paddle 20 is horizontally placed by a paddle support 28 made of an elastic body such as rubber. It is what I supported. The paddle support 28 is attached in a water-stopped state with bolts 30 and 30 via a mounting plate 29 at a position outside the valve housing 11 of the mounting hole 19, and by a mounting portion 28 a protruding toward the valve chamber 11 a ′. The support arm 20a is sandwiched in a horizontal state. Therefore, when the valve body 16 is opened and the paddle is rotated in the direction of the arrow F by the water flow in the direction of the arrow C, the switch operating unit 20a ′ brings the movable contact piece 23b of the water flow detection switch 22 into contact with the fixed contact piece 23a. The switch 22 can be turned on. According to such a configuration, the support configuration of the paddle 20 can be further simplified. When the water flow is extinguished, the paddle 20 returns to the horizontal state due to the elastic force of the support 28.

  As described above, according to the water flow detection device 11 for fire extinguishing equipment according to the present invention, since the structure is simple, failures and malfunctions can be reduced as much as possible, and the maintainability can be improved.

  Further, since the rotation end 20 'of the paddle 20 is provided in the vicinity of the periphery of the rotation end 16' of the valve body 16, the operational sensitivity of the paddle 20 can be increased, thereby maintaining high water detection sensitivity. However, the area of the paddle 20 can be reduced.

  Further, when the water flow guide member 24 (27) is provided on the back surface of the valve body 16, the operation sensitivity of the paddle 20 can be further increased. For this reason, the water flow guide plate 24 (27) can maintain the operational sensitivity of the paddle 20 at a high level, for example, when the flow rate is small or when the pipe diameter is large and the flow rate of the fire extinguishing water is slow. it can.

  Further, since the area of the paddle 20 can be reduced, the paddle 20, the flowing water detection switch 22 and the like can be reduced in size, and the paddle 20 and the flowing water detection switch 22 are installed in the existing check valve housing 11a. It is also possible to attach to the paddle 20 without the need for a special tube for attaching the paddle 20, and the entire flowing water detection device can be made very small.

  Furthermore, since the paddle area itself is small, the water flow resistance by the paddle 20 is small, and the pressure loss can be very low.

It is side surface sectional drawing of the flowing water detection apparatus for fire extinguishing facilities of 1st Embodiment which concerns on this invention. It is side surface sectional drawing of an apparatus same as the above, and shows the open state of a valve. It is a cross-sectional view of an apparatus same as the above. It is a principal part side view of the paddle vicinity of an apparatus same as the above. It is a principal part side view of the paddle vicinity of an apparatus same as the above, and shows a valve open state. It is a cross-sectional view of other embodiment of an apparatus same as the above. It is a cross-sectional view of other embodiment of an apparatus same as the above. It is side surface sectional drawing of the flowing water detection apparatus for fire extinguishing facilities of 2nd Embodiment which concerns on this invention. It is side surface sectional drawing of an apparatus same as the above, and shows the open state of a valve. It is a cross-sectional view of an apparatus same as the above. It is a principal part side view of the paddle vicinity of an apparatus same as the above. It is a principal part side view of the paddle vicinity of an apparatus same as the above, and shows a valve open state. It is a perspective view of the water flow guide member of an apparatus same as the above. It is a cross-sectional view of other embodiment of an apparatus same as the above. (A) is a cross-sectional view of another embodiment of the above apparatus, and (B) is a perspective view of a water flow guide member in another embodiment of the above apparatus. It is side surface sectional drawing of the paddle vicinity of the water flow detection apparatus for fire extinguishing facilities of 3rd Embodiment which concerns on this invention. It is a figure showing the whole sprinkler equipment composition in an office building.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Flowing water detection apparatus 11a Valve housing | casing 11a 'Secondary side valve chamber 16 Valve body 16' Turning end 16 "Perimeter 18, 28 Paddle support body 19 Mounting hole 20 Paddle 20 'Turning end 20a Support arm 20a' Switch operation member 22 Water Flow Detection Switches 24, 27 Water Flow Guide Member 24b Water Flow Guide Plates 27b, 27c Water Flow Guide Plate

Claims (5)

A water flow detection device for fire extinguishing equipment that detects the water flow by operating a water flow detection paddle with a water flow from the primary side to the secondary side in the check valve housing,
In the secondary valve chamber in the check valve housing, while supporting the paddle that can be rotated by the water flow at a position outside the peripheral edge of the valve body constituting the check valve,
The paddle is disposed so that its paddle surface does not overlap the valve body and the rotation end thereof is positioned close to the side edge of the valve body,
And while providing a switch operation member on the opposite side to the rotation end of the paddle, a running water detection switch that can be driven by the switch operation member is provided,
A water flow detection device for fire extinguishing equipment, wherein the water flow detection switch is driven by the movement of the switch operating member based on the rotation of the paddle.   The water detection device for fire extinguishing equipment according to claim 1, wherein the paddle is disposed at a position where a rotation end thereof is close to the rotation end of the valve body.   An attachment hole is provided in the valve housing wall surface of the secondary side valve chamber, a paddle support is attached to the attachment hole, a support arm is rotatably attached to the support, and one end of the support arm on the valve chamber side The said paddle is provided in a part, the said switch operation member is provided in the other end part of the said support arm, The said water flow detection switch is provided in the exterior of the said valve housing, The Claim 1 or 2 characterized by the above-mentioned. Water flow detector for fire fighting equipment.   4. A water flow guide member for guiding a water flow from the primary side to the secondary side in the direction of the paddle when the valve body is opened is provided on the back surface of the valve body. The flowing water detection device for fire extinguishing equipment according to crab.   The water flow guide member includes a water flow guide plate that protrudes from the back surface of the valve body toward the primary water flow path, and guides the water flow in the paddle direction by the water flow guide plate. Item 5. A water flow detection device for fire extinguishing equipment according to Item 4.

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