TWI507229B - Water detection device - Google Patents

Description

Flow detection device

The present invention relates to a running water detecting device provided on a fire fighting equipment pipe.

The flowing water detecting device is a device that is installed in a fire-fighting equipment pipe such as a sprinkling device or a foam fire-fighting device, and detects a flow of water in the pipe and outputs a signal.

The inside of the running water detecting device adopts a check valve structure, and the valve body that divides the inside into the primary side chamber and the secondary side chamber by the valve is normally closed. The primary side chamber and the secondary side chamber are normally filled with water, and the piping connected to the primary side chamber (hereinafter referred to as "primary piping") is connected to the water source, and the piping connected to the secondary side chamber (hereinafter referred to as "secondary piping") is provided. Sprinkler heads such as sprinklers or foam faucets.

The flowing water detecting device is provided to detect the operation of the sprinkler head provided in the secondary side pipe. For example, when the sprinkling faucet is operated, since the water filled in the secondary side pipe is discharged from the sprinkling faucet, the secondary side pipe is depressurized. . Therefore, the pressure in the secondary side chamber of the flowing water detecting device is also reduced, and the force caused by the pressure acting on the valve body is out of balance, and the force acting on the valve body from the primary side chamber side is greater than the force acting on the valve body from the secondary side chamber side. Force, and the valve body is opened.

The opening of the valve body is detected, and the switching device operates and outputs a signal. The output signal is connected to a monitoring device installed in a management room of the building, etc., and the administrator or the like is notified of the operation of the sprinkler based on the signal from the monitoring device.

In the flow detecting device of the check valve structure shown above, a hole communicating with the outside is formed in the valve seat where the valve body is seated, and the hole is connected with the pressure switch, and the pressure switch has a pattern for generating a signal (for example, refer to Shi Gongzhao Japanese Patent Publication No. 61-14780.) A type in which a displacement caused by opening of a valve body is detected and a signal is output (for example, Japanese Laid-Open Patent Publication No. Hei 9-99114 or JP-A-2006-55400).

In the flow detection device of the type of the latter, in the flow detection device of Japanese Laid-Open Patent Publication No. Hei 9-99114 or JP-A-2006-55400, the switch for outputting signals is covered by the switch box or the casing for protection against dust or moisture. The switch case or the like is often made of a resin in order to reduce weight or reduce cost.

However, in recent years, the switch box or the casing is also required to have strength or waterproof performance, and in use, it is easy to perform wiring work of the signal line to which the monitoring device is connected, and it is possible to easily perform the disassembly and assembly of the switch box or the casing. The requirements have also increased.

Therefore, in view of the above problems, it is an object of the present invention to provide a flowing water detecting device which is capable of improving the strength or waterproof performance of a switch type box for protecting a flowing water detecting device, and is operated at the time of signal line wiring or inspection. The handling is good.

(1) The flowing water detecting device of the present invention which achieves the object includes a main body that is provided on a fire fighting equipment pipe and has a check valve structure therein, and a casing that houses a signal output means for detecting the stop The valve body of the return valve is opened and outputs a signal. The device is characterized in that the casing includes a base and a cover, and the base has a first surface that is a connection surface with the body and is arranged to be bent from the first surface into an L shape. The second surface of the base is fixed to be detachable from the first surface and the second surface of the base and covers the signal output means.

In the present invention, the casing includes a base and a cover, and the base has a first surface that is a connection surface with the main body and a second surface that is formed to be bent from the first surface into an L shape, and the cover is fixed to the first surface of the base. And the second side is disassembled and covers the signal output means.

Therefore, when the cover is removed, the internal structure of the casing supported by the L-shaped base is largely exposed, so that the wiring work or the inspection workability of the signal output means inside the casing is excellent. Further, since the base is formed in an L shape, since different members or constituent elements can be disposed on the first surface and the second surface, space can be saved as a whole of the casing. For example, a bracket supporting the signal output means may be provided on the first surface, and a through hole of an external lead wire connected to the signal output means may be formed on the second surface, and a bracket and a lead may be provided in the base formed in a flat shape. Compared to the case of holes, it saves space.

(2) The present invention is characterized in that the cover has an engaging portion that engages with an edge on the opposite side of the first surface of the base and the second surface, and a fixing means that fixes the cover to the second of the base surface.

In the present invention, the cover has an engaging portion that engages with an edge on the opposite side of the first surface of the base and the second surface, and a fixing means that fixes the cover to the second surface of the base. That is, when the cover is attached, for example, in the case where the fixing means is a screw, the cover can be fixed to the base only by locking one screw, and the cover can be easily attached and detached during the wiring work or the inspection work. .

(3) The present invention is characterized in that the fixing means is provided at one position of the periphery of the second surface of the base.

In the present invention, the fixing means is provided at one position on the periphery of the second surface of the base. Therefore, when the cover is mounted, for example, in the case where the fixing means is a screw, the cover can be fixed to the base only by locking one screw, and the cover can be easily attached and detached during the wiring work or the inspection work. .

(4) The present invention is characterized in that the second surface of the base is a bottom surface of the casing, and a through hole of the outer lead wire connected to the signal output means is provided on the bottom surface, and a bracket is provided on the base which is formed into a flat plate shape and Space saving compared to the case where the wire passes through the hole.

In the present invention, the second surface of the base is the bottom surface of the casing, and since the through hole of the outer lead wire is connected to the signal output means at the bottom surface, the bracket and the wire are provided at the same time as the base formed in the flat shape, for example. Save space by comparing holes.

(5) The present invention is characterized in that the base is provided in a bracket that supports a signal output means inside the casing.

According to the present invention, since the bracket that supports the signal output means inside the casing is provided on the first surface of the base, space is saved compared with the case where the bracket and the through hole of the wire are provided at the same time as the base of the flat plate shape.

(6) The present invention is characterized in that the bracket has a lower mounting portion that supports the signal output means, and an upper mounting portion that supports the terminal block, which is bent upward from the lower mounting portion into an inverted L shape and coupled. The signal output means connects the wires from the outside.

In the present invention, the bracket has a lower mounting portion for supporting the signal output means, and an upper mounting portion for supporting the terminal block, which is bent upward from the lower mounting portion into an inverted L shape and connected to the signal output means. External wires. Therefore, the signal output means or the terminal block housed in the casing can be divided into two upper and lower stages, and the space of the casing can be saved. Further, since the terminal block is provided on the bracket, the terminal block is disposed at a position close to the signal output means, and the length of the wire for connecting the signal output means and the terminal block can be shortened. Alternatively, the terminal of the signal output means and the terminal block may be directly connected.

(7) The present invention is characterized in that an opening is provided in the bracket, and a signal stopping means for preventing a signal output means from outputting a signal is attached.

In the present invention, since the opening is provided in the bracket and the signal stopping means for blocking the output signal of the signal output means is attached, the signal stopping means can be easily mounted at an appropriate position.

(8) The present invention is characterized in that the fixing means is a locking member fixed by screwing.

In the present invention, since the fixing means is a locking member fixed by screwing, for example, in the case where the locking member is a screw, only the locking is performed, the cover can be fixed to the base, and the wiring work or the inspection work can be simple. Moreover, the cover is disassembled and assembled with good workability.

(9) The present invention is characterized in that the cross-sectional shape of the engaging portion of the cover is an inverted U-shape in which the edge of the first surface of the base is engaged from above.

In the present invention, the cross-sectional shape of the engaging portion of the cover is an inverted U-shape in which the edge of the first surface of the base is engaged from above, and the engaging portion of the inverted U-shaped cross section of the cover is fitted into the first surface. The engagement can be surely performed, and has an effect of preventing water from intruding into the interior of the base.

(10) The present invention is characterized in that a rail is provided on the inner side of the base, which guides the sliding of the cover to the base.

In the present invention, a rail is provided on the inner side of the base, which guides the sliding of the cover to the base. Therefore, a structure in which the cover slides along the rail can be made.

(11) The present invention is characterized in that a rail is provided in the insertion/removal direction of the edge of the first surface of the base by the engaging portion.

In the present invention, a rail is provided in the insertion/removal direction of the edge of the first surface of the base by the engaging portion. Therefore, the rail can be guided by the cover, and the mounting direction of the cover to the base, that is, the insertion and removal direction of the engaging portion, can be guided to slide the cover.

(12) The present invention is characterized in that the track is provided in a continuous shape continuous from the first surface to the second surface.

In the present invention, the rail is provided in a continuous shape from the first surface to the second surface. Therefore, the first surface and the second surface can be configured such that the cover slides along the rail.

(13) The present invention is characterized in that a rail is formed to protrude toward the inner side of the casing.

In the present invention, since the rail is formed to protrude toward the inner side of the casing, the rail can exert the reinforcing effect of the base.

(14) The present invention is characterized in that a signal stopping means for preventing a signal output means from outputting a signal is provided inside the casing.

In the present invention, since the signal stopping means is provided inside the casing to prevent the signal output means from outputting the signal, it is not necessary to carry the signal stopping means at the time of inspection or maintenance.

(15) The present invention is characterized in that a signal stopping means is integrally provided on the cover for preventing the signal output means from outputting a signal.

In the present invention, since the signal stopping means is integrally provided in the cover to prevent the signal output means from outputting the signal, it is not necessary to prepare the signal stopping means by other components, and the number of components can be reduced, and the other components can be prevented. Loss of signal stop means.

The present invention is not limited to the above description, and the advantages, features, and uses of the present invention will become more apparent from the description of the appended claims. Further, it is to be understood that any appropriate modifications that do not depart from the scope of the invention are included in the scope of the invention.

It is preferable that the first surface of the base is provided on the side surface of the main body of the flow detecting device. Further, although the cover fixing means is provided on the periphery of the second surface, the fixing means may be an externally threaded screw which is screwed into the hole penetrating the cover and the base in a state where the cover is attached to the base. As another fixing means, instead of the outer threaded screw, the pin or the tape or the belt may be detachably fixed to the cover and the base.

In the case where the rail extending from the first surface provided on the inner surface side of the base surface to the second surface is a convex portion having a convex shape, a segment may be provided at a peripheral portion of the cover sliding with the projection, and the segment may be along The structure is formed by sliding the side of the protrusion. Further, in the case where the rail has a concave cross section, the cover can be slid while the end of the cover is fitted into the recess.

In the bracket that supports the signal output means on the first surface, when the signal output means uses the limit switch, it is preferable to fix the limit switch to the bracket so that the limit switch is placed at an appropriate position on the base.

Further, in the bracket, in addition to the limit switch, a limit switch pressing means and a delay means may be provided, and the limit switch pressing means transmits the movement of the detecting rod which is operated by opening the valve in the body of the water detecting means to the limit switch. The delay means delays the operation of the limit switch pressing means.

In addition, the terminal block connected to the limit switch may be disposed on the surface of the bracket, or the terminal block and the terminal of the limit switch may be directly connected.

The bracket may be provided with an opening for mounting a signal stopping means for preventing the operation of the limit switch in an appropriate position when the flow detecting device is inspected. By attaching the rod-shaped signal stopping means to the opening, the signal stopping means is located between the restriction switch and the restriction switch pressing means, and the movement of the restriction switch pressing means to the restriction switch side can be prevented.

The signal stopping means may be accommodated in the casing in advance, and the locking portion of the signal stopping means may be provided in the casing. Alternatively, the signal stopping means may be integrally formed as a part of the cover.

[Examples]

Hereinafter, embodiments of the present invention will be described with reference to Figs. 1 to 10 . 1 is a cross-sectional view of the flowing water detecting device of the present invention, FIG. 2 is a XX cross-sectional view of FIG. 1, FIG. 3 is a YY cross-sectional view of FIG. 2, and FIG. 4 is a partial portion of the housing of FIG. Fig. 5 is a partial enlarged view showing a method of using the signal stopping means, Fig. 6 is a side view of Fig. 4, Fig. 7 is a perspective view of the base, Fig. 8 is a perspective view of the cover, and Fig. 9 is a A partially enlarged view showing a state of use of the signal stop means of the other embodiment, and a tenth view showing a base of the other embodiment. Further, in order to facilitate the drawing, in addition to the fourth drawing, the illustration of the wires connecting the limit switches and the terminal blocks is omitted.

The flowing water detecting device of the present invention shown in Figs. 1 to 3 is composed of a main body 1, a casing 2, and a drain valve 3.

The body 1 is hollow, and the inside is divided into a primary side chamber I and a secondary side chamber II by a partition wall 4. A communication hole 5 is drilled in the partition wall 4, and an annular valve seat 6 is provided on the secondary side chamber II side of the communication hole 5.

The valve body 7 is seated on the valve seat 6, and a cylindrical bearing 8 is formed on a portion of the periphery of the valve body 7, and the valve rod 9 penetrates the bearing 8 and is disposed in the body 1. The valve body 7 is configured to pivot about the valve rod 9 and to rotate in the direction of the secondary side II. When the valve body 7 rotates, the valve body 7 is separated from the valve seat 6, and the fluid of the primary side chamber I passes through the annular valve seat 6, and It can pass to the secondary side chamber II.

At the periphery of the valve body 7, a projection 10 formed by projecting from the edge is provided. The end portion 11A of the detecting rod 11 is in contact with the surface on the valve seat 6 side of the protruding portion 10, and the detecting rod 11 is axially supported. The detecting rod 11 is configured to be rotatable up and down in the drawing.

The end 11B on the opposite side of the end of the detecting rod 11 which is in contact with the valve body 7 protrudes toward the outside of the body 1 and is covered by the casing 2. As shown in Fig. 4, at the end 11B, a spring seat 12 projecting to the upper side in the figure is provided, and on the coaxial side of the spring seat 12, a spring seat 13 is provided which is disposed on the base B, and the coil spring 14 is disposed on the rebound body Between the two spring seats 12, 13.

The end 11B of the detecting rod 11 is always biased toward the lower side in the drawing by the coil spring 14, and the end 11A on the opposite side of the end 11B is turned upward in the drawing by the shaft in the middle of the detecting rod 11, that is, the direction in which the valve body 7 is opened. The bias is applied, but the force exerted by the coil spring 14 is a weak force to the extent that the valve body 7 does not open.

Further, at the end 11B of the detecting rod 11, the contact member 16 which is in contact with the switch pressing means 15 is fixedly disposed. The contact member 16 biases the limit switch pressing means 15 in a direction away from the limit switch 17 by the action of a spring portion having a curved shape at the front end thereof.

The spring portion at the front end of the contact member 16 is provided with a delay mechanism 18 in a direction in which the switch pressing means 15 is biased. The delay mechanism 18 has a function of delaying the operation of the switch pressing means 15, and adopts a configuration using an air damper or an oil damper. The detailed description of the delay mechanism 18 is omitted.

The tray 19 covering the limit switch pressing means 15, the limit switch 17, and the delay mechanism 18 is a section The three shapes are formed in a zigzag shape, and the three constituent elements 15, 17 and 18 are disposed between the two opposing planes 19A. Each constituent element is provided at a predetermined position by a small screw 19D penetrating through two planes. The end of the flat surface 19A of the pallet 19 is bent parallel to the surface B1 of the base B, and is fixed to the surface B1 of the base B by a small screw or the like (see FIGS. 2 and 5).

An opening 19C is formed in a plane 19B that is disposed perpendicular to the two opposing planes 19A of the pallet 19 shown in FIGS. 3 to 5. The opening 19C is formed to mount the signal stopping means 20, and the signal stopping means 20 is for preventing the restriction switch pressing means 15 from moving to the restriction switch 17 side. When the distal end 20A of the rod-shaped signal stopping means 20 is inserted into the opening 19C, the restriction switch pressing means 15 is prevented from moving to the restriction switch 17 side. The signal stopping means 20 is shown in cross section in Figs. 5 and 6.

In order to attach the signal stopping means 20 to an appropriate position, when the flange portion 20B is formed in the middle of the signal stopping means 20, the insertion amount of the tip end 20A to the inside of the pallet 19 is restricted, and the signal stopping means 20 is set at an appropriate position. (Refer to Figure 5).

The flat surface 19B of the pallet 19 is formed to extend toward the upper portion of the delay mechanism 18 in the drawing, and the terminal block 21 is mounted. In this way, the casing 2 can be divided into two upper and lower stages and placed in the limit switch 17 or the like or the terminal block 21, and the casing 2 can save space. Further, in order to provide the terminal block 21 on the pallet 19, the terminal block 21 can be placed at a position close to the limit switch 17, and the length of the connected wires can be shortened. The position at which the terminal block 21 is disposed is not limited to the upper portion of the delay mechanism 18, and may be provided on the surface of the plane 19A of the above-described pallet 19, or may be provided at a position other than the pallet 19, such as the base B.

The base B of the casing 2 shown in Fig. 7 is formed into a shape in which the flat plate is bent into an L shape, and has a surface B1 and a surface B2. The surface B1 serves as a "first surface" through which the detecting rod 11 is inserted and connected to the main body 1. The surface B2 is provided as a "second surface" curved from the surface B1. The end of the plane 19A of the pallet 19 is connected to the face B1, and the face 22 is drilled with a hole 22 for inserting a wire connecting the outside from the terminal block 21 into the inside of the casing 2. Thus, by forming the base B into an L-shaped shape, dissimilar elements or constituent elements can be disposed on the surface B1 and the surface B2, and for example, a flat plate shape of the base can be formed, and the passage of the bracket or the wire can be set. Compared with the case of the hole, the casing 2 can be saved as a whole.

On the inner surface side of the base B, a rail 23 continuous from the surface B1 to the surface B2 is formed. By having the track 23, the cover C can be guided to the bottom when the cover C is removed The sliding of the seat B can reinforce the structure of the base B. The cross-sectional shape of the rail 23 is formed in a convex shape. Further, the side 24 of the face B2 facing the face B1 has a hole 25 which is fixed to cover the cover C of the base B, and is internally threaded in the hole 25.

The cover C covers the limit switch 17 or the delay mechanism 18 and the terminal block 21 provided on the base B for protection against dust or water droplets. When the cover C is removed, the internal structure of the casing 2 supported by the L-shaped base B is largely exposed, so that the wiring work or the inspection workability of the limit switch 17 or the terminal block 21 housed in the casing 2 is excellent. The cover C is formed so as to be slidable along the rail 23 of the base B (see Fig. 2). In a portion corresponding to the upper end of the surface B of the cover C and the surface B of the base B, the cross-sectional shape is formed into an inverted U shape, and the inverted U-shaped portion 27 as the "engagement portion" is embedded in the case where the cover C is attached to the base B. The structure is locked to the upper end of the surface B1 of the base B (refer to Fig. 4). Therefore, the cover C and the base B can be surely engaged, and the engagement structure can also prevent water from intruding into the interior of the base B.

A hole 28 is formed in the cover C, and is coaxial with the axis of the hole 25 provided on the periphery of the surface B2 of the base B in a state where the cover C is attached to the base B. When the small screw passes through the hole 28 and is screwed with the internal thread screw in the hole 25 on the side of the base B, the cover C is fixedly disposed to the base B. In this way, the attachment and detachment work of the cover C to the base B is only to lock or loosen one small screw, and the wiring work or the inspection work can be performed with ease of workability.

The signal stop means 20 described above may be formed integrally with the cover C. Specifically, as shown in Fig. 8, the protruding portion 20 as the "signal stop means" may be provided on the cover C, which can be used as shown in Fig. 9. In this way, it is not necessary to prepare the signal stopping means 20 with other components, and the number of components can be reduced, and the loss of other components can be prevented. Alternatively, the protruding portion may be provided on the inner surface side of the cover C. Further, as described in FIG. 10, the signal stopping means 20 is provided with the locking hole 29 in the base B, and can be provided in the casing 2 in advance when not in use, and it is not necessary to carry the signal stopping means 20 at the time of inspection or maintenance. .

The drain valve 3 is a valve that discharges the fluid in the body 1 to the outside during inspection or maintenance, and is disposed adjacent to the casing 2. The inside of the drain valve 3 is an angle valve structure, and the discharge port is disposed downward in Fig. 1 . The handle for opening and closing the drain valve 3 is provided on the front side and is disposed at the position of the easy-to-operate handle.

Next, the operation of the flowing water detecting device of the present invention will be described.

The flow detection device described above is installed in the fire service equipment piping, and the primary side chamber I is connected to a pump (not shown) and a pipe connected to the water source, and a water sprinkler (not shown) is provided at the end of the pipe connected to the secondary side chamber II.

The inside of the fire-fighting equipment piping is in a state of being filled with water, and the primary side chamber I and the secondary side chamber II inside the main body 1 of the flowing water detecting device are also in a water-filled state. Normally, the valve body 7 is seated on the valve seat 6, and the supply of water from the primary side chamber I to the secondary side chamber II is cut off.

When the sprinkler of the pipe provided on the side of the secondary side chamber II in the event of a fire is operated, since the water in the pipe in the secondary side chamber II is discharged from the sprinkler, the pressure is gradually lowered. Since the water pressure of the secondary side chamber II of the valve body 7 is originally reduced, the valve body 7 is pushed up by the water pressure of the primary chamber I, and the shaft 9 is pivoted.

Since the valve body 7 is opened by leaving the valve seat 6, the water of the primary side chamber I is supplied to the secondary side chamber II side. At the same time, the detecting rod 11 contacting the valve body 7 is also rotated by the bias of the coil spring 14, and the end 11B on the side of the casing 2 is moved to the lower side in Fig. 4.

Therefore, the contact 16 of the end 11B leaves the restriction switch pressing means 15, and the restriction switch pressing means 15 starts moving toward the restriction switch 17 side. The delay mechanism 18 restricts the switch pressing means 15 to operate the limit switch 17 after a predetermined period of time elapses, and transmits a signal of the limit switch 17 to the monitoring device provided in the administrator's room by the wire connected to the terminal block 21.

The above-described pump is started based on a signal from the limit switch 17, and water is supplied from the water source to the operating sprinkler, and water is continuously sprinkled from the sprinkler to extinguish the fire.

1‧‧‧ Ontology

2‧‧‧Shell

3‧‧‧Drain valve

4‧‧‧ partition wall

5‧‧‧Connected holes

6‧‧‧ valve seat

7‧‧‧ valve body

8‧‧‧ bearing

9‧‧‧ valve rod

10‧‧‧Protruding

11‧‧‧Detector

20‧‧‧Signal stop means

21‧‧‧ terminal block

27‧‧‧Inverted U-shaped part

C‧‧‧盖

I‧‧‧One side room

II‧‧‧Second side chamber

Fig. 1 is a cross-sectional view showing a flowing water detecting device according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view taken along line X-X of Fig. 1.

Fig. 3 is a Y-Y sectional view of Fig. 2;

Fig. 4 is an enlarged view of a portion of the casing of Fig. 3.

Fig. 5 (a) and (b) are enlarged explanatory views showing the peripheral portion of the restriction switch of the method of using the signal stopping means.

Figure 6 is a side view of Figure 4.

Figure 7 is a perspective view of the base.

Figure 8 is a perspective view of the cover.

Fig. 9 is an enlarged explanatory view showing a peripheral portion of the limit switch of the use state of the signal stop means of the other embodiment.

Figure 10 is a perspective view showing the base of another embodiment.

1. . . Ontology

4. . . partition

5. . . Connecting hole

6. . . Seat

7. . . Valve body

8. . . Bearing

9. . . Valve rod

11. . . Detection rod

20. . . Signal stop means

twenty one. . . Terminal Block

27. . . Inverted U-shaped part

C. . . cover

I. . . Primary side chamber

II. . . Secondary side chamber

Claims (15)

A flowing water detecting device comprising: a body disposed on a fire fighting equipment pipe and having a check valve structure therein; and a hollow box-shaped casing, which is a receiving signal output means for detecting a valve of the check valve structure Opening the body and outputting a signal, wherein the casing includes a base and a cover, and the base has a first surface formed by a back surface of the casing having the shape of the hollow casing and serving as a connection surface with the body, and the hollow The bottom surface of the box-shaped casing is formed and provided to be a second surface that is bent from the first surface into an L shape, and the lid is fixed so as to be detachable from the first surface and the second surface of the base and to cover the signal output means. The water detecting device according to claim 1, wherein the cover has an engaging portion that engages with an edge on a side opposite to the first surface of the base and the second surface; and a fixing means for fixing the cover to the base The second side. A flow detecting device according to claim 2, wherein the fixing means is provided at a position on a periphery of the second surface of the base. The flow detecting device according to claim 1, wherein the second surface of the base is a bottom surface of the casing, and a through hole of the external lead wire connected to the signal output means is provided on the bottom surface. A running water detecting device according to claim 1, wherein a bracket supporting the signal output means inside the casing is provided on the first surface of the base. A flow detecting device according to claim 5, wherein the bracket has a lower mounting portion that supports the signal output means; and an upper mounting portion that supports the terminal block and is bent upward from the lower mounting portion into an inverted L shape And connect the wires from the outside connected with the signal output means. A flow detecting device according to claim 5 or 6, wherein an opening is provided in the bracket, and a signal stopping means for preventing a signal output means from outputting a signal is mounted. A flow detecting device according to claim 2, wherein the fixing means is a locking member fixed by screwing. The flow detecting device according to claim 2, wherein the cross-sectional shape of the engaging portion of the cover is an inverted U-shape in which the edge of the first surface of the base is engaged from above. A flow detecting device according to claim 1 or 2, wherein a rail is provided on an inner side of the base to guide the sliding of the cover to the base. The flow detecting device according to claim 10, wherein the engaging portion is provided with a rail in a direction in which the edge of the first surface of the base is inserted and removed. A flowing water detecting device according to claim 10, wherein the rail is provided in a continuous shape from the first surface to the second surface. A flowing water detecting device according to claim 10, wherein a rail is formed to protrude toward an inner side of the casing. A flow detecting device according to claim 1, wherein a signal stopping means is provided inside the casing for preventing the signal output means from outputting a signal. For example, the flow detection device of claim 1 of the patent scope, wherein the cover is A signal stopping means is integrally provided to prevent the signal output means from outputting a signal.