TWI426196B - Water flow detection device - Google Patents

Description

Water flow detecting device

The present invention relates to a water flow detecting device provided on a fire fighting equipment piping.

The water flow detecting device is provided on the piping of the fire extinguishing device, and has the function of detecting the water flow in the piping of the fire extinguishing device and outputting a signal to the action of the water jet head or the synchronous open valve provided by the secondary side pipe of the water flow detecting device. . In recent years, the water flow detecting device has been required to be miniaturized and simplified, and in particular, the water flow detecting device provided in the high-rise building has a tendency to be simplified and densely packed (for example, refer to Patent Document 1).

In the water flow detecting device described in Patent Document 1, the control valve provided in the primary pipe of the water flow detecting device is integrally provided in the water flow detecting device, or a plurality of switching means for outputting signals are housed in one switch box. This saves labor and saves space during construction.

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2005-114174

The connection between the water flow detecting device and the pipe of Patent Document 1 is a screw type. In the case of the screw type, since it is lighter than the flange type, it is easy to carry. However, when it is installed in the pipe, it is necessary to apply a large torque to perform the locking work. Also, it is extremely difficult to disassemble when it needs to be replaced after installation.

Further, the cover that closes the opening of the water flow detecting device is also in the shape of a plug having a large diameter. As in the above, the cover cannot be opened without applying a large torque. Cover, it is very time-consuming and labor-intensive to maintain the operation.

Further, since the water flow detecting device installed in the apartment is provided for each household, it is necessary to provide tens to hundreds of water flow detecting devices in one apartment. Therefore, construction or inspection is very time-consuming and laborious. Therefore, it is expected that the removal and installation of the cover of the terminal box can be carried out in a short time when the terminal block is wired.

In the inspection operation, as means for preventing the output signal from the water flow detecting means from being output to the outside, means for stopping transmission to the outside by electrical means, or means for physically preventing the switch from being actuated by a checker or the like, the latter There will be missing inspection pieces or forgotten disassembly after inspection.

In the maintenance work, in the conventional water flow detecting device suitable for the apartment, in order to make the test valve easy to operate and discharge a predetermined flow rate, a ball valve is often used as the test valve. However, as time passes, waste inside the piping may accumulate on the primary side of the ball valve. Although the test valve is removed from the water flow detecting device and the cleaning operation is performed to remove the waste, the water flow detecting device is often installed in a small space in which a gas pipe or the like is provided, and the operator needs to spend a large labor to test. Loading and unloading of valves.

An object of the present invention is to provide a water flow detecting device which is more space-saving and lighter than the above-described water flow detecting device, and which is also excellent in workability during construction or maintenance.

In order to achieve the above object, the invention according to claim 1 is a water flow detecting device which is provided in a fire-fighting equipment pipe, and includes a terminal box in which a switch type is housed, and a control valve is integrally formed on the primary side, and is closed and formed. The cover of the opening of the front side of the water flow detecting device is composed of a plurality of snails The plug is fixed, and the water flow detecting device is characterized in that the position of the bolt is set at a position inclined from the axis of the water flow detecting device.

The water flow detecting device according to claim 1, wherein in the water flow detecting device, a pressure gauge connection port is provided on a front surface of the water flow detecting device, and the pressure gauge connection port is formed in the water flow. Detecting the axis of the device.

The invention described in claim 3 is a water flow detecting device which is provided in a fire-fighting equipment pipe, and includes a terminal box in which a switch and a terminal block are housed, and a control valve is integrally formed on the primary side, and the control valve is a ball valve. A space for accommodating the sphere is formed inside the primary side of the water flow detecting device, and is constituted by a stopper that holds the sphere housed in the space, and the water flow detecting device is characterized in that it is provided once to be connected to the water flow detecting device The fluid in the piping on the side passes through the primary side fluid passage means of the above space.

The water flow detecting device according to the invention of claim 4, wherein in the water flow detecting device, the primary fluid passage means is formed in a hole or a slit of the stopper.

The water flow detecting device according to the invention of claim 3, wherein in the water flow detecting device, the primary fluid passage means opens into a water passage provided in the space of the water flow detecting device body.

The water flow detecting device according to the invention of claim 3, wherein in the water flow detecting device, the primary fluid passage means passes through the hole in the spherical body.

The water flow detecting device according to claim 3, wherein in the water flow detecting device, a space from the storage ball body is provided to the outside of the primary side of the water flow detecting device. a hole in which the pressure gauge is connected.

The invention described in claim 8 is a water flow detecting device which is provided in a fire-fighting equipment pipe, and includes a terminal box in which a switch type is housed, and a control valve is integrally formed on the primary side, and a connection portion with the pipe is a flange And the water flow detecting device is characterized in that one of the peripheral edges of the flange is cut away, and a flat surface is formed on the side of the flange.

The water flow detecting device according to claim 8, wherein in the water flow detecting device, a valve shaft of the control valve is protruded from a surface formed on a side surface of the flange, and The protruding valve rod is provided with a handle for switching the control valve.

The invention described in claim 10 is the water flow detecting device according to claim 8, wherein the water flow detecting device is provided with a connection port of a pressure gauge on a surface formed on a side surface of the flange.

The water flow detecting device according to the invention of claim 8, wherein the water flow detecting device has a segment formed on a connection surface with the pipe side flange, and is connected to the pipe side flange. The part is a ring.

The water flow detecting device according to claim 8, wherein the water flow detecting device is provided with a flange on a side of a flange of the fire fighting device at a flange edge of the water flow detecting device. The embossing pedestal is formed by the outer peripheral edge.

The invention described in claim 13 is the water flow detecting device according to the first aspect, the third aspect, or the eighth aspect of the invention, wherein the connection portion of the water flow detecting device and the fire fighting equipment is flanged. And the bolt hole of the flange is an internal thread.

The invention described in claim 14 is a water flow detecting device which is installed in a fire-fighting equipment pipe, and is provided with a signal output which detects a flow of water when the valve body is opened by a water flow in the pipe and outputs a signal. And the water flow detecting device is characterized in that the signal output stopping means of the signal is provided.

The invention described in claim 15 is the water flow detecting device according to claim 14, wherein the signal output means is provided in a limit switch in the terminal box, and the signal output stopping means is provided in the limit switch and the limit switch. Loading and unloading is possible between the pressing means.

The water flow detecting device according to claim 15 of the invention, wherein the signal output stopping means is a signal stopping unit provided between the limit switch and the limit switch pressing means, and the signal output stopping means is The locking portion of the predetermined position is locked and the grip portion is configured.

The water flow detecting device according to claim 15 or claim 16, wherein the signal output stopping means is provided in the limit switch and the limit switch pressing means in the signal output stopping means. In the state of the interval, one of the signal output stopping means protrudes to the outside of the terminal box.

The invention described in claim 18 of the patent application is as claimed in claim 15 The water flow detecting device according to the above aspect, wherein in the water flow detecting device, the setting portion of the signal output stopping means that can be provided between the limit switch and the limit switch pressing means by the signal output stopping means is determined by the limit switch and the limit switch pressing means nearby.

The water flow detecting device according to claim 19, wherein the signal output stopping means has a loss preventing means.

The invention described in claim 20 is a water flow detecting device which is installed in a fire fighting equipment pipe, and is provided with a signal output means for detecting a water flow in the pipe and outputting a signal, and further comprising a water discharge amount and a water flow detecting device. a test valve having the same amount of water discharged from the nozzle of the water jet head provided on the secondary side, and the water flow detecting device is characterized in that the connecting portion formed to protrude outside the water flow detecting device is provided with a curved valve structure of the flow path and the bonnet is detachable Test valve.

The water flow detecting device according to claim 20, wherein the test valve connecting portion of the water flow detecting device is formed in an elbow tubular shape.

The water flow detecting device according to claim 20, wherein the test valve connecting portion of the water flow detecting device is disposed behind the water flow detecting device.

The water flow detecting device according to claim 20, wherein the test valve connecting portion of the water flow detecting device is disposed to be eccentric from a shaft of the water flow detecting device.

The invention described in claim 24 of the patent application is as claimed in claim 20 The water flow detecting device according to the item, wherein in the water flow detecting device, the test valve is connected to the connection portion of the water flow detecting device by an external thread.

The water flow detecting device according to claim 20, wherein in the water flow detecting device, the valve body of the test valve is detachably attachable to the test valve body.

The invention described in claim 26 is a water flow detecting device which is installed in a fire-fighting equipment pipe and is provided with a signal output means for detecting a water flow in the pipe and outputting a signal, and the signal output means is housed in the terminal box, and The water flow detecting device is characterized in that the cover of the terminal box can be removed by wing rotation.

The invention of claim 27, wherein the water flow detecting device according to claim 26, wherein the contact portion between the body of the terminal box and the cover is formed with a segment, and the cover side is closed in a state in which the cover is closed. The inner surface of the segment is in surface contact with the outer surface of the segment on the body side.

The invention of claim 28, wherein the water flow detecting device according to claim 26, wherein a rotating portion is provided on one side of the cover of the terminal box, and a protrusion is provided on a side of the body side corresponding to the side. To the external protrusion.

The water flow detecting device according to claim 28, wherein the rotating portion of the cover of the terminal box has a cross-sectional shape formed to surround the protruding portion. The shape of the shape is provided on the inner side with a gap portion through which the cover can be rotated.

The invention described in claim 30, wherein the water flow detecting device according to claim 26 or 27, wherein the cover of the terminal box is It is fixed to the terminal box body by one screw.

According to the invention described in the first and second aspects of the patent application, the position of the bolt for fixing the cover opening the water flow detecting device is obliquely provided from the axis of the water flow detecting device, and the position of the bolt on the shaft is set. The ratio between the upper and lower flanges can be shortened.

According to the invention of the third to seventh aspects of the invention, the space for arranging the spherical body formed on the primary side of the water flow detecting device and the pipe connected to the primary side of the water flow detecting device are provided (hereinafter referred to as "primary side" The fluid in the pipe ") can be formed to be detectable by connecting the pressure gauge to the hole that communicates with the space for detecting the fluid pressure in the primary pipe through the primary fluid passage means in the space. Thereby, the fluid pressure in the space in the primary side pipe is made equal to the fluid pressure in the space in the primary side pipe, and the pressure gauge is placed in the hole leading to the space, and the fluid pressure in the primary side pipe can be measured.

According to the invention of claim 8 to 11, the weight can be reduced by partially cutting off the peripheral edge of the flange, and a flat surface is formed on the side of the flange by cutting, and a pressure gauge is disposed on the plane. Connect the port or protrude the valve shaft of the control valve to set the handle.

According to the invention of claim 12, the marking base is provided at the periphery of the flange as a position where the water flow detecting device can be easily imprinted, and the marking operation can be efficiently performed.

According to the invention of the thirteenth aspect of the invention, the bolt hole of the flange is internally threaded, and the bolt is screwed to the water flow through the flange hole of the pipe side. The internal thread of the flange of the device is detected, whereby the water flow detecting device can be connected to the pipe. Compared with the case where the bolt hole of the flange which passes the bolt through the pipe side and the bolt hole of the flange of the water flow detecting device are locked by the nut, the nut is not required, and the nut is not required to be screwed together. The length of the bolt can also be shortened.

According to the invention of claim 14, the water flow detecting device provided with the signal output means for detecting the flow of water when the valve body of the water flow detecting device is opened and outputting a signal can be provided with a signal output stopping means for the water flow detecting means. The signal is not output to the outside during verification.

According to the invention described in claim 15 to claim 18, the signal output means is a limit switch, and the signal output stop means is disposed between the limit switch and the limit switch pressing means, and a part of the signal output stopping means is partially protruded during installation. Since it is outside the terminal box, the cover of the terminal box cannot be closed, so that it is possible to prevent the signal output stop means from being forgotten.

Further, the signal output stopping means is provided with a locking portion that can lock the signal output stopping means to a predetermined position, and further determines that the signal output stopping means can be set to the limit switch and the limit switch pressing in the vicinity of the limit switch and the limit switch pressing means. The signal output stop means can be mounted at the correct position by the signal output stop means between the means, and the signal output stop means can be stably attached to the predetermined position by the locked state at the time of mounting.

According to the invention described in claim 19, if the signal output stop means is lost, troubles such as preparation of substitutes may occur during the inspection, so the setting is made. Loss prevention means.

According to the invention of claim 20, since the test valve provided in the water flow detecting device has the angle valve structure, the effect of setting the height of the test valve can be shortened. Further, since the bonnet can be detached, it is not necessary to disassemble the test valve from the water flow detecting device when the waste is accumulated on the test valve, and the waste inside the test valve can be easily removed by merely removing the bonnet.

According to the invention of claim 21 to claim 24, the test valve connecting portion of the water flow detecting device can be formed into an elbow tubular shape, and the test valve can be directly connected without passing through the pipe joint. Further, the width of the installation space of the water flow detecting means can be reduced by providing the test valve connecting portion behind the water flow detecting means. Further, the width of the installation space can be further reduced by arranging the test valve connecting portion to be eccentric from the axis of the water flow detecting device.

According to the invention of claim 25, the valve body of the test valve can be attached to and detached from the test valve body, and the waste is easily accumulated in the test valve, and the lining in the test valve is replaced. When the waterproof member such as a pad is used, it is not necessary to remove the test valve from the water flow detecting device to perform the replacement work.

According to the invention described in claim 26 and claim 27, the cover of the terminal box can be rotatably detached, and the inner surface of the segment side and the outer surface of the body side of the cover side can be closed with the cover closed. The surface contact is formed such that water is difficult to enter the terminal box.

According to the invention of claim 28 and claim 29, a rotating portion is provided on one side of the cover of the terminal box, and a protruding portion protruding to the outside is provided on a side corresponding to the main body side of the side, so that the terminal box is a cross-sectional shape of the rotating portion of the cover is formed to surround the protruding portion The gap portion in which the cover can be rotated is provided on the inner side, whereby the cover can be smoothly rotated and can be easily removed.

According to the invention described in claim 30, the operation of the cover switch can be improved by fixing the terminal box by one screw.

In the water flow detecting device of the present invention, the cover for closing the opening of the body of the water flow detecting device is fixed to the body by a plurality of bolts, and the position of the bolt is set to be inclined from the axis of the body of the water flow detecting device by more than 0 degrees to 90 degrees. The position so far is preferably set at 10 to 30 degrees.

In addition to the above configuration, the connection port of the pressure gauge may be provided on the shaft. The connection port of the pressure gauge can also be formed as a hole penetrating from the side of the flange to the inside of the water flow detecting device.

Further, in the control valve of the ball valve structure provided on the primary side of the water flow detecting device, the primary side fluid passage means for allowing the space for accommodating the sphere to communicate with the primary side pipe can be held in the space by the ball The stopper forms a hole or a slit which can communicate the space with the inside of the primary pipe, or may be formed by a hole or a slit which can communicate the space with the primary pipe by the inner circumferential surface of the water flow detecting device, or may be provided The bypass is communicated with the inside of the primary pipe, and the hole is bored at a position perpendicular to the water passage passing through the ball.

It is also possible to provide a flat surface on a flange by cutting a side surface of the flange. The plane formed after the cutting may be provided with a connection port or a through hole communicating with the inside of the water flow detecting device. Also, the plane can be stamped.

Further, when the annular portion is formed on the joint surface to be connected to the pipe side of the flange, it is preferable that the diameter of the ring does not hinder the bolt hole of the flange.

In addition to the above configuration, the internal thread may be machined on the inner surface of the bolt hole of the flange.

Preferably, the signal output stopping means for detecting the flow of water in the pipe and outputting the signal by the signal output means is not only used for inspection but also detachable, and is normally housed in the terminal box.

In the inspection, in order to ensure that the signal output stop state is positive, the guide portion of the signal output stop means may be provided in the vicinity of the limit switch or the like so that the signal output stop means is surely set at a predetermined position between the limit switch and the limit switch pressing means. on.

In order to surely cancel the signal output stopping means after the end of the inspection, it is preferable that the cover of the terminal box is not closed in a state where the signal output stopping means is applied.

Further, in order to prevent the signal output stop means from being lost, the storage space of the signal output stop means may be provided in the terminal box, or the signal output stop means may be tied to the terminal box or the pipe by a wire or a chain.

The test valve is opened during inspection to confirm the function of the water flow detecting device, but the waste in the piping may accumulate in the test valve during long-term use. Therefore, in order to be able to clean the inside of the test valve, it is preferable to enable the bonnet or the valve body to be detached so as to be able to clean the inside.

In order to miniaturize the water flow detecting device, it is preferable to use a small test valve, but in order to discharge a predetermined flow rate, the diameter of the test valve must be one. It is preferably a test valve constructed using a flow path curved angle valve. Further, preferably, the switch operating handle of the test valve is located at a position that can be viewed from the front of the water flow detecting device.

On the other hand, if the position of the handle is excessively deviated from the position of the body of the water flow detecting device, the width of the water flow detecting device is widened, so that the connection portion of the body of the water flow detecting device connected to the test valve can be deviated from the axis of the water flow detecting device. The handle position is in the proper position.

[Examples]

Hereinafter, a first embodiment of the present invention will be described with reference to Figs. 1 to 12 . 1 is a perspective view of the water flow detecting device of the present invention, FIG. 2 is a front view of the water flow detecting device, FIG. 3 is the inside of the terminal box, FIG. 4 is a X-X sectional view of FIG. 2, and FIG. 5 is a bottom view of the water flow detecting device. Fig. 6 is a sectional view of the test valve, Fig. 7 is an internal structure diagram of the terminal box, Fig. 8 is an exploded view when the valve body rotation detecting means is attached to the terminal box, and Fig. 9 is an external view of the signal output stopping means, 10 is a Y-Y sectional view of Fig. 7, and a state in which a signal output stopping means is attached, Fig. 11 is a plan view showing a cover of a terminal box, and Fig. 12 is an enlarged sectional view of a portion P of Fig. 11. Furthermore, the illustration of the signal lines connecting the various switches and the terminal block is omitted in the figure.

The water flow detecting device shown in Figs. 1 to 5 is composed of a main body 1, a valve body 2, a valve body rotation detecting means 3, a control valve 4, and a terminal box 5.

The main body 1 is cylindrical and has flanges 6A and 6B that are connected to the pipe to be connected to the upper and lower sides. The flanges 6A and 6B are cut away in a straight line except for the front side, and a flat portion is formed on the side surface of the flange. Further, a triangular segment portion 6C is provided between the front surface and the left side surface of the flange 6B, and the plane of the segment portion 6C is provided. It is structured to be stamped.

A segment portion 6D is formed on the inner side of the bolt hole on the surface of the flanges 6A and 6B that is connected to the pipe, and the annular plane of the segment portion 6D is a portion that comes into contact with the pipe side flange. Since the segment portion 6D is provided, it is only necessary to perform cutting processing on the surface in contact with the pipe side flange, thereby reducing the processing area and improving work efficiency.

The inside of the body 1 is divided into a primary side I and a secondary side II by a partition wall 7. An opening 8 for maintenance is formed on the secondary side II of the body 1, which opening 8 is closed by a cover 9. The cover 9 is provided to the body 1 by a plurality of bolts 9A, and the position of the bolts 9A is set at a position inclined by 10 to 30 degrees from the central axis of the body 1 shown by the one-dot chain line in Fig. 2 .

Since this structure is used, the size between the upper and lower flanges 6A and 6B can be made smaller than in the case where the bolt is provided on the center axis of the body, so that weight reduction can be achieved.

The partition wall 7 inside the main body 1 is formed with a communication port that connects the primary side I and the secondary side II, and a cylindrical valve seat 10 is provided at the communication port. A disk-shaped valve body 2 is provided on the surface of the secondary side II of the valve seat 10. The valve body 2 is configured such that a cylindrical bearing portion 11 is formed at one of the peripheral edges, and the hinge pin 12 is passed through the bearing portion 11 to rotate the valve body 2 freely.

The hinge pin 12 is configured to rotate together with the rotation of the valve body 2, and although not shown, the projection formed at one end of the hinge pin 12 is engaged with the groove provided in the bearing portion 11. The other end side of the hinge pin 12 protrudes from the body 1 to the outside, and a cam 13 is fixedly disposed at the other end of the hinge pin 12, and a signal can be output when the valve body 2 is opened by the valve body rotation detecting means 3.

The detailed description regarding the structure of the valve body rotation detecting means 3 is described in Japanese Laid-Open Patent Publication No. 2005-292113, and the description thereof is omitted.

A test valve 14 is connected to the secondary side II of the body 1, and the water inside the secondary side II can be discharged to the outside, and the amount of water discharged is equal to that of the nozzle of the water jet head provided on the secondary side of the water flow detecting device. The test valve 14 is disposed at the end of the water path 15 extending horizontally from the back of the body 1 to the outside. The flow path at the end of the water path 15 is bent into an elbow-shaped tube and is internally threaded, and a test valve connecting portion 15A is formed.

The water path 15 preferably has a descending gradient toward the end side. The test valve 14 is an angle valve structure, and the connection portion with the test valve connecting portion 15A is horizontal in FIG. 1 and the drain port 16 faces downward, so that the trouble of causing the drain port 16 to face downward via a joint such as an elbow pipe as before can be saved. .

As shown in Fig. 5, the water passage 15 is formed to protrude to a position slightly offset from the axis of the water flow detecting device. The position of the handle of the test valve 14 can be brought close to the water flow detecting means by shifting the position, so that the installation space width of the water flow detecting means can be suppressed.

Test valve 14 is an angle valve configuration as described above. The connecting portion between the test valve and the water flow detecting device shown in Fig. 6 is an external thread 14A, and a drain port 16 having an internal thread is provided at a position rotated by 90 from the external thread 14A. A valve seat 14B is formed inside the external thread 14, and the valve body 14C, the shaft 14D, and the bonnet 14E are disposed on the same shaft on the valve seat 14B.

A waterproof member 14F is assembled to the valve seat surface side of the valve body 14C. Further, a column portion screwed to the shaft 14D is formed on the side opposite to the valve seat surface. The shaft 14D has a rod shape and is formed at one end with an internal thread 14G screwed into the column portion of the valve body 14C. another The end side penetrates the bonnet 14E and protrudes to the outside of the test valve 14, and a handle is fixedly disposed at the end.

The bonnet 14E is screwed to the body of the test valve 14 and is detachably constructed.

An orifice 14H is formed inside the drain port 16. The orifice 14H ensures that the amount of water discharged is equal to the amount of water discharged from the nozzle of the nozzle.

The control valve 4 is disposed in the primary side I of the body 1. A space 22 that accommodates the spherical body 21 in which the water passage 21A is formed is formed on the primary side I. A sheet ring 23 that receives the spherical body 21 is provided on the valve body side of the space 22, and a sheet ring 24 is also provided on the side of the primary side flange 6A facing each other. The sheet ring 24 is fitted in the segment portion 26 formed on the inner peripheral surface side of the sheet cover 25 having an outer diameter on the outer peripheral surface, and the outer peripheral surface of the sheet cover 25 is screwed into the lower portion of the space 22 The inner thread portion 27 of the wall is formed.

The threaded portion 27 in the space 22 is formed with a slit 28 as shown in FIG. 5, and is configured to pass from the primary side flange 6 side to the space 22, and the water in the primary side pipe can communicate toward the space 22. Further, a hole 29 leading to the front surface of the cover 9 provided with the main body 1 is bored in the space 22, and a pressure gauge (not shown) is connected to the hole 29 to measure the pressure of the primary side pipe.

The ball 21 can rotate the ball 21 by the handle 30 disposed outside the body 1. When the handle 30 is in the upright state as shown in FIG. 1, the pipe can be connected from the primary side to the valve body 2 by the water passage 21A of the ball 21. When the handle 30 is rotated 90 degrees to the cover side and then fallen, the ball 21 is rotated by 90 degrees, and the water passage 21A is positioned on the inner wall side of the space 22. Since the water in the space 22 is blocked by the sheet ring 23, water cannot flow from the primary side pipe to the valve body 2.

The handle 30 and the ball 21 are connected by a shaft 31 which is disposed to penetrate the surface-treated convex portion 32 between the right side surface of the flange 6A and the space 22.

The terminal box 5 houses the valve body rotation detecting means 3 therein, and further includes a terminal block 41 to which a signal line is connected for transmitting a signal from the water flow detecting means to a management room (not shown). Alarm device or monitoring device. The terminal block 41 is configured such that a wiring portion is provided on both side faces of the terminal block 41, and a signal line is inserted into the connection hole 42 connected to the wiring portion. Thereby, the signal line can be inserted from the front side of the body 1 to the connection hole 42, and the width of the terminal box 5 can be shortened.

The terminal box 5 is composed of a frame 51 and a cover 52. A plurality of spacers are formed inside to divide the inside of the frame 51. The internal structure of the casing 51 is shown in FIG. In the figure, the left side is the front side of the water flow detecting device, and the right side is the back side. The inside of the casing 51 is roughly divided into two sections by a spacer 53 as a partition wall.

Cylindrical portions 54, 54 are formed above and below the spacer 53, and screws for fixing the terminal block 41 are screwed into the cylindrical portion 54. The spacer 53 and the cylinder 54 have a predetermined height, and the terminal block 41 is provided in the casing 51 from the frame 51 and the connection surface 55 of the water flow detecting device with a certain space.

The valve body rotation detecting means 3 is provided on the right side of the spacer 53. An opening 56 is provided between the valve body rotation detecting means 3 and the spacer 53, and the hinge pin 12 protrudes from the opening 56 into the casing 51. A cam 13 having a shape of a cutting disc is fixed to an end portion of the hinge pin 12.

One end of the substantially U-shaped rod 57 is in contact with the arc portion 13A of the cam 13. The rod 57 is pivotally supported in the vicinity of the curved portion to be rotatable. Rod 57 The other end latches the limit switch pressing means 58 included in the valve body rotation detecting means 3.

The valve body rotation detecting means 3 includes a limit switch 59, and when the valve body is opened by the limit switch 59, a signal can be output. Specifically, after the valve body 2 of the water flow detecting device is opened, the cam 13 fixedly disposed at the front end of the hinge pin 12 that rotates together with the valve body 2 also rotates. The rotation of the cam 13 causes the arc portion 13A of the cam 13 to contact the lever, and the lever 57 also rotates as indicated by a broken line in the figure to release the locking of the limit switch pressing means 58.

The limit switch pressing means 58 moves in the direction of the limit switch 59 by the release of the release lever 57, and presses the button of the limit switch 59, thereby transmitting an electric signal from the limit switch 59.

As shown in FIG. 8, the valve body rotation detecting means 3 including the limit switch pressing means 58 and the limit switch 59 is provided as a unit in the casing 51, and the limit switch pressing means 58 and the limit switch 59 are provided in the casing 51. The support plate 60 at a predetermined position is provided with the valve body rotation detecting means 3 in the casing.

On the support plate 60, a plurality of brackets 61 placed on the base of the frame 51 are disposed to bend the support plate 60. Further, a screw hole for providing the bearing portion of the rod 57, the valve body rotation detecting means 3, and the support plate 60 to the frame body 51 or the like is provided. Further, a guide 63 for mounting the signal output stopping means 62 as means for causing the signal from the limit switch not to be output to the outside is formed.

The guide 63 forms a concave cut at the edge of the opening formed around the bracket 61 before the bending to form the bracket 61 of the support plate 60. Furthermore, the surface of the valve body rotation detecting means 3 is also in the same position as the guide member 63. An opening is formed in the place, and one of the limit switches 59 is partially exposed. The signal output stopping means 62 can be attached between the limit switch pressing means 58 and the limit switch 59 from the opening.

The signal output stopping means 62 attached to the guide 63 has a rod shape as shown in Fig. 8, and is a signal stopping portion 62A deep in the insertion guide 63, a locking portion 62B provided at the intermediate portion, and a hand grip The grip portion 62C of the signal output stopping means 62 is configured. The axis of the signal stop portion 62A is different from the axis of the grip portion 62C, and a segment portion is formed in the locking portion 62B.

The cross-sectional shape of the signal stopping portion 62A is substantially the same as the shape of the slit of the guide 63, and can be inserted deep in the guide 63 along the guide 63. Although the limit switch pressing means 58 shown in Fig. 10 is biased in the direction of the arrow, the movement in the direction of the arrow is prevented by the lever 57. When the signal stopping portion 62A is inserted deep in the guide 63, the signal stopping portion 62A will be located between the limit switch pressing means 58 and the limit switch 59, and even if the lever 57 is released, the limit switch pressing means 58 will be prevented from reaching the limit. The movement of the switch 59 side.

The segment of the locking portion 62B contacts the surface of the limit switch 59 in a state where the signal stopping portion 62A is inserted deep in the guide 63. Further, the grip portion 62C has a length that protrudes outside the casing 51 in a state where the signal output stopping means 62 is attached to the guide 63, and the cover 52 cannot be closed in this state.

The signal output stopping means 62 is provided in the housing portion 64 in the housing 51 as shown by the two-dot chain line in FIG.

A check switch 65 is provided in the space on the left side of the spacer 53. This space is used for the space where the terminal block is wired at the construction site. Therefore, the components other than the inspection switch are disposed in the space on the right side of the spacer 53.

The frame 51 shown in Fig. 11 is a box type, and the front side and the right side of the water flow detecting device are open. The cover 52 has a substantially L-shaped curved shape that closes the opening. A segment is formed at an edge of the contact portion between the frame 51 and the cover 52, and the outer surface of the segment portion 71A of the frame 51 overlaps with the inner surface of the segment portion 71B of the cover 52 to be in surface contact.

Figure 12 is an enlarged cross-sectional view showing a portion P of Figure 11; The segment portion on the back side of the casing 51 is formed with a rotating shaft portion 72 that is formed to protrude outward, and a chamfer 73 is formed at the corner portion. A section is formed on the side of the cover 52 corresponding to the rotating shaft portion 72. The bearing portion 74 of the font is also provided with a gap portion 75 at the corner portion of the inner surface side of the bearing portion 74.

By rotating the chamfer 73 of the shaft portion 72 and the chamfering 75 of the bearing portion 74, the cover 52 can be rotated to a predetermined angle, and after the rotation, the cover 52 is moved to the back direction, thereby being detachable from the frame 51. Cover 52.

1‧‧‧ Ontology

2‧‧‧ valve body

3‧‧‧ Valve body rotation detection means

4‧‧‧Control valve

5‧‧‧Terminal box

6A, 6B‧‧‧Flange

9‧‧‧ Cover

12‧‧‧ Hinge pin

13‧‧‧ cam

14‧‧‧Test valve

21‧‧‧ sphere

22‧‧‧ Space

23, 24‧‧‧ slice ring

25‧‧‧Sheet cover

30‧‧‧Hands

31‧‧‧Axis

41‧‧‧ terminal block

51‧‧‧Terminal box frame

52‧‧‧ terminal box cover

58‧‧‧limit switch pressing means

59‧‧‧limit switch

60‧‧‧Support board

62‧‧‧Signal output stop means

63‧‧‧ Guides

65‧‧‧Inspection switch

71A, 71B‧‧ Section

72‧‧‧Rotary shaft

74‧‧‧ bearing department

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view of a water flow detecting device of the present invention.

Figure 2 is a front view of the water flow detecting device.

Figure 3 shows the inside of the terminal box.

Figure 4 is a cross-sectional view taken along line X-X of Figure 2.

Figure 5 is a bottom plan view of the water flow detecting device.

Figure 6 is a cross-sectional view of the test valve.

Fig. 7 is a view showing the internal structure of the terminal box.

Fig. 8 is an exploded view showing the valve body rotation detecting means attached to the terminal box.

Fig. 9 is an external view of a signal output stopping means.

Figure 10 is a Y-Y cross-sectional view of Figure 7 (with signal output stop means installed) State).

Figure 11 is a plan view showing the cover of the terminal box.

Fig. 12 is an enlarged cross-sectional view showing a portion P of Fig. 11: (a) a state in which the cover is closed, and (b) a state in which the cover is rotated.

1‧‧‧ Ontology

5‧‧‧Terminal box

6A, 6B‧‧‧Flange

6C, 6D‧‧‧

9‧‧‧ Cover

14‧‧‧Test valve

16‧‧‧Drainage

29‧‧‧ hole

30‧‧‧Hands

31‧‧‧Axis

32‧‧‧ convex

Claims (9)

A water flow detecting device comprising: a body connected to a fire fighting equipment pipe, a valve body having a reverse flow stop valve structure therein; and a terminal box for accommodating a signal output means for detecting a water flow in a fire fighting equipment piping The output terminal is characterized in that: the terminal box is provided with: a frame body, is mounted on one side of the body, and has an opening connected to the side surface not adjacent to the front surface of the corresponding body and the side surface adjacent to the one side; and closing the opening The cover can be removed by pivoting the side of the rear side of the outer side surface as a center of rotation toward the side of the outer side surface and opening the opening of the frame body. The water flow detecting device of claim 1, wherein the edge of the opening of the frame and the edge of the opening of the closure cover are formed with a portion in contact with each other in a closed state, and the cover is closed while the cover is closed. The inner surface of the segment on the cover side is in surface contact with the outer surface of the segment on the frame side. The water flow detecting device according to claim 1, wherein a bearing portion is provided on a rear end side rear end portion of the outer side surface of the cover, and a rear side rear end portion on a frame side corresponding to the rear side rear end portion is provided. A rotating shaft portion that protrudes to the outside and supports the rotation of the bearing portion of the cover is provided. The water flow detecting device of claim 3, wherein the cross-sectional shape of the bearing portion of the cover is formed to surround the rotating shaft portion In the shape of a word, a gap portion to which the corner portion is cut is provided inside the bearing portion. The water flow detecting device according to any one of claims 1 to 4, wherein the cover is fixed to the frame by a bolt from a front surface of the main body. The water flow detecting device of claim 1, wherein the terminal box has a smaller front surface corresponding to the front surface of the main body, and the side surface corresponding to the side surface of the main body has a thin box shape as viewed from the front side of the main body. . The water flow detecting device according to claim 1, wherein the terminal box has a terminal block having a connection hole for inserting the signal wire from the front side of the main body. The water flow detecting device according to any one of claims 1 to 4, wherein the main body has an opening for maintenance and a cover for closing the opening. The water flow detecting device of claim 5, wherein the body has an opening for maintenance on the front surface and a cover for closing the opening.