TWI503145B - Water detection device - Google Patents

Description

Flow detection device

The present invention relates to a running water detecting device for detecting running water in a pipe filled with water and outputting a signal, and more particularly to a running water detecting device provided on a piping of a fire fighting device.

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 flowing 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 is normally closed. The primary side chamber and the secondary side chamber are usually filled with water, and the piping connected to the primary side chamber (hereinafter referred to as "primary piping") is connected to a water source such as a water storage tank, and the piping connected to the secondary side chamber (hereinafter referred to as "secondary side" The piping") is connected to a sprinkler head such as a sprinkler or a foam faucet.

The flow detection device is provided to detect the operation of the shower head provided in the secondary pipe. For example, when the water faucet is operated, since the water filled in the secondary pipe is discharged from the faucet, the pipe of the secondary pipe is inside. The pressure is reduced. Therefore, the pressure inside 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 acting on the valve body from the secondary side chamber side. The force is applied while the valve body is opened.

The flowing water detecting device includes a switching device that detects the opening of the valve body, and the switching device operates to output 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.

As a conventional example of such a flow detecting device, a configuration is known (for example, refer to Japanese Laid-Open Patent Publication No. Hei No. 2006-55400), which includes: a valve body having a valve body having a swing check valve structure; and opening of a valve body The detecting rod and the switching means are disposed outside the valve body to detect the displacement of the detecting rod in conjunction with the opening of the valve body, and output a signal.

As shown in Fig. 14, the flow detecting device described in Japanese Laid-Open Patent Publication No. Hei. No. 2006-55400 includes a bar-shaped switch operating rotational wrist 31 as a detecting rod. The paddle portion 31b of the turning arm 31 provided at one end thereof contacts the upper portion of the valve body D, and the other end side of the turning arm 31 protrudes toward the outside of the valve body, and the switch cam portion 31c is provided. In the vicinity of the switch cam portion 31c, a reed switch 35 capable of outputting a signal is provided. The structure of the rotating wrist 31 is pivoted by a horizontal shaft 32 disposed between the valve body and the reed switch 35. When the paddle portion 31b is displaced with the opening of the valve body D, the rotating wrist 31 rotates with the rotating shaft 32 as a fulcrum. The switch cam portion 31c operates the reed switch 35.

The rotating shaft 32 of the above-described flowing water detecting device is provided in a reed switch mounting sliding sleeve 29 to which the reed switch 35 is attached to the valve main body (check valve housing 21), and the mounting sliding sleeve 29 and the valve body are screwed. .

Therefore, when the mounting sliding sleeve 29 is screwed into the valve body, it may be provided in a state where the rotating shaft 32 is not inclined horizontally. Alternatively, in the initial state, even if the rotating shaft 32 is horizontally disposed, the mounting sliding sleeve 29 is removed during maintenance, and there is a possibility that it is not set to be horizontal and inclined during installation, and thus the switch operation is rotated. The shaft 32 of the wrist 31 may not be inclined and contacted in parallel with the rotation axis of the valve body D.

When the switch arm 31 is tilted and brought into contact with the valve body D as described above, the switch operation rotational wrist 31 is operated in an unexpected direction when the valve body D is opened, and it is impossible to obtain a predetermined performance.

Therefore, in view of the above problems, an object of the present invention is to provide a flowing water detecting device that detects a displacement of a detecting rod and outputs a signal, and the detecting rod generates a running water inside the pipe and the valve body is opened. Rotating, the device can set the rotating shaft of the detecting rod to be always parallel with the rotating shaft (valve shaft) of the valve body.

To achieve the object, the present invention provides the following flow detecting device.

(1) That is, the present invention provides a flowing water detecting device comprising: a body having a valve body having a swing check valve structure; and a detecting rod disposed to penetrate from the inside to the outside of the body, and being axially and water-like The pin shafts intersecting in the flow direction are rotatably; the biasing means biases the detecting rod so as to be in contact with the valve body; and the switching means outputs a signal according to the rotation of the detecting rod; the device is characterized by: the shaft branch The pin of the detecting rod is disposed inside the hollow buckle; the buckle is disposed between the body and the switch means; and the retaining means is provided at the buckle, which holds the pin at a position where the axial direction and the flow direction of the water intersect.

According to the present invention, the buckle retaining means can be held at a position where the axial direction of the pin in which the detecting rod shaft provided inside the retaining ring is freely rotated always intersects the flow direction of the water.

(2) The present invention can be configured such that an engaging portion having a projection or a hole or a notch is formed on a surface of a retaining ring as a holding means; and an extending block is provided between the main body and the switching means, and the The engaging portion of the engaging portion.

According to the present invention, as the buckle holding means, the engaging portion of the protrusion or the hole or the notch is formed on the surface of the buckle, and the engaging portion is locked to the extending block, whereby the positional deviation of the buckle can be prevented. Or the position is changed, and the axial direction of the pin provided in the buckle is always at a position intersecting the flow direction of the water.

(3) Further, the present invention provides a flowing water detecting device comprising: a cylindrical body, a valve body having a swing check valve structure, and a valve shaft; the detecting rod is disposed to penetrate from the inside to the outside of the body, and The valve body is rotated and opened in conjunction with the opening and closing; the pin is configured to rotate the detecting rod shaft; and the switching means outputs a signal according to the rotation of the detecting rod; the device is characterized by comprising a holding member which holds the pin and The valve shaft of the valve body is parallel; and the holding member is provided with a rotation restricting portion that blocks the rotation of the body.

According to the present invention, since the holding member that holds the pin in parallel with the valve shaft of the valve body is included, and the holding member includes a rotation restricting portion that blocks the rotation of the body, the rotating shaft of the detecting rod can be set to always and the valve body The valve shafts are parallel, and the water flowing due to the rotation of the detecting rod of the opening and closing of the valve body can be accurately detected.

(4) The present invention can be configured in such a manner that the holding member is a retaining ring having a groove or a hole for holding the pin and an extending block for holding the retaining ring and attached to the body, and the rotation restricting portion is provided at the retaining ring and extending Protrusions and recesses of opposite faces of the block.

(5) Further, the present invention can be configured in such a manner that the holding member is a buckle having a groove or a hole for holding the pin and a casing provided with a switching means facing the buckle, and the rotation restricting portion is provided at the buckle Projections and recesses facing the opposite sides of the casing.

According to the present invention, the detent ring can hold the pin in parallel with the valve shaft of the valve body, and the rotation restricting member can surely prevent the positional deviation or positional change of the buckle.

(6) The present invention can be configured as follows. The holding member is a casing having a groove or a hole for holding the pin and having a switching means provided therein, and the rotation restricting portion is provided on the opposite surface of the casing and the body. Protrusions and recesses.

According to the present invention, since the pin can be held by the casing provided with the switching means, it is not necessary to hold the other parts of the pin, and the rotation restricting member can surely prevent the positional deviation or the positional change of the casing from the body.

(7) The present invention can be configured to include a biasing means for biasing the detecting rod in a direction in which the valve body is opened.

According to the present invention, the rotation of the valve body during the opening and closing of the valve body causes the rotation of the detecting rod to be interlocked. Since the detecting rod does not apply a closing load to the valve body even when the running water is detected, it can also be applied to a large-diameter operating valve type. Flow detection device.

(8) According to the present invention, the casing system in which the switch means is housed can be configured to be detachable from the main body.

According to the present invention, by using the casing accommodating the switching means separately from the main body, the detecting rod or the sealing member is placed on the side of the casing, and can be treated as a single unit separate from the main body.

(9) The present invention can be configured such that a sealing member having a cylindrical portion into which the detecting rod is inserted and a convex portion that expands in a direction perpendicular to the axis of the cylindrical portion can be provided. The edge portion is disposed such that one side of the flange portion is parallel to one side of the buckle.

According to the present invention, the one side of the flange portion of the sealing member provided on the retaining ring and the one side of the retaining ring with the gasket are disposed in parallel because the flange portion of the sealing member receives the body from the flow detecting device. When the water pressure is applied, the one side of the buckle can be pressed, so that the sealing effect can be improved by the close contact between the flange portion and the buckle.

(10) The present invention can be configured such that a sealing member is provided in the buckle, and the sealing member has a cylindrical portion inserted into the detecting rod and a convex portion that expands in a direction perpendicular to the axis of the tubular portion. The edge portion of the flange portion is sandwiched by the buckle and the extension block.

According to the present invention, by sandwiching the flange portion of the sealing member with the buckle and the extension block, an excessive load is applied to the sealing member due to the rotation of the detecting rod, thereby preventing the sealing member from being detached and causing water leakage. .

(11) According to the present invention, it is possible to arrange two gaskets between the flange portion of the sealing member and the buckle, and to provide a single surface of the two gaskets in contact with each other.

According to the present invention, by sliding the two washers while tracking the movement of the detecting rod while the detecting rod is rotated, the load acting on the flange portion of the sealing member can be reduced.

(12) With regard to the present invention, it is possible to form a coating on the surface of the gasket.

According to the present invention, the sliding action of the gasket can be made smooth.

(13) The present invention can be configured to include a cylindrical jig that restricts movement of the sealing member to the main body side.

According to the present invention, the sealing member can be prevented from moving to the body side.

(14) According to the present invention, the hole shape of the jig can be formed by long holes.

According to the present invention, by making the hole shape of the jig a growing hole, it is possible to restrict the amount of rotation (angle) when the detecting bar moves in a direction orthogonal to the direction of the water flow or in a direction parallel to the direction of the water flow.

(15) According to the present invention, the front end of the casing side of the buckle can be inserted into the hole drilled in the casing.

According to the present invention, the front end of the casing side of the buckle is inserted into the hole drilled in the casing, so that the detection rod pivotally supported by the pin in the buckle and the restriction switch or restriction disposed in the casing can be used. The positional relationship of the switch pressing piece becomes appropriate.

(16) The present invention can be configured such that the rebounding body is provided at the end of the casing side of the detecting rod, and the rebounding body is attached to the spring seat provided on the detecting rod and the spring seat provided in the casing. And a rotation amount limiting means for limiting the amount of rotation of the detecting rod is provided at the spring seat.

According to the present invention, it is possible to restrict the end portion of the body side of the detecting rod from excessively rotating in the direction of closing the valve body.

(17) The present invention can be configured such that the flange portion is formed at the front end of the detecting rod on the main body side, and the flange portion has rounded edges.

According to the present invention, the detecting rod rotates as the valve body performs the opening operation, but since the detecting rod moves away from the protruding portion of the valve body, the flange portion slides on the surface of the protruding portion, so that The sliding action becomes a smooth effect.

According to the flowing water detecting device of the present invention, the rotating shaft of the detecting rod can be set to be always parallel with the valve shaft of the valve body, because the detecting rod does not contact the valve body and is in contact with each other, so that the total displacement amount of the detecting rod can be rotated. It becomes a fixed value. Therefore, it is possible to accurately detect the state in which the water flows inside the pipe and the valve body is opened in accordance with the rotational displacement of the detecting rod, and it is possible to realize a flow detecting device having high reliability of the operation detection. In particular, it is possible to realize a valve-type flow detecting device having high reliability in motion detection, and it can also be applied to a name that is placed in a general building size (the "size" in the inspection rule of the running water detecting device). The larger diameter of 65A (2-1/2") ~ 200A (8").

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 appropriate modifications may be made without departing from the spirit and scope of the invention.

Hereinafter, embodiments of the present invention will be described with reference to Figs. 1 to 13 .

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. Enlarged view, Fig. 5 is an enlarged view of the vicinity of the buckle of Fig. 4, Fig. 6 is an enlarged view of the vicinity of the sealing member of Fig. 5, and Fig. 7 is the state of the detection rod of Fig. 5, the eighth Figure 7 is a partial assembly diagram of the extension block and the buckle, and Figure 9 is an explanatory view of the embodiment of the hole shape of the clamp as a growth hole, and Figure 10 is an explanatory view of another embodiment of the buckle, and Figure 11 is maintained. Fig. 12 is an enlarged cross-sectional view showing another embodiment of the sealing member and the gasket, and Fig. 13 is an enlarged cross-sectional view showing another embodiment of the sealing member.

The flowing water detecting device A of the present invention shown in Figs. 1 to 3 includes 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 formed in the partition wall 4, and an annular valve seat 6 is provided on the side of the secondary side chamber II.

The disc-shaped valve body 7 is seated on the valve seat 6, the cylindrical bearing 8 is formed on a part of the circumference of the valve body 7, and the valve rod 9 is inserted through the bearing 8. The valve rod 9 is horizontally erected inside the body 1 while being held by the body 1. The valve body 7 is a check valve structure in which the valve rod 9 is pivoted in the direction of the secondary side chamber II, and the valve body 7 is rotated in the direction of the secondary side chamber II to leave the valve seat 6, and the fluid of the primary side chamber I It passes through the annular valve seat 6 and can pass through the secondary side chamber II.

On the periphery of the valve body 7, a projecting portion 10 (Fig. 2, Fig. 3) 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. The detecting rod 11 is axially supported by the pin P in the middle (Fig. 4), and is configured to be rotatable up and down in the drawing. In a state where the end portion 11A of the detecting rod 11 contacts the valve body 7, the detecting rod 11 is in a substantially horizontal state.

A flange portion F is formed at the front end of the end portion 11A of the detecting rod 11, and the edge of the flange portion F is formed into a rounded shape. By imparting this rounded corner, the detecting rod 11 also rotates as the valve body 7 performs the opening operation, but the flange portion F is at the protruding portion because the detecting rod 11 is separated from the protruding portion 10 of the valve body 7. Since the surface of the 10 is slid so as to operate, there is an effect that the sliding action of the detecting rod 11 on the protruding portion 10 can be smoothed. The flange portion F may not be a disc shape but may be implemented in a spherical shape.

The end portion 11B of 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 FIGS. 4 and 5, a columnar spring seat 12 projecting upward in the drawing is provided at the end portion 11B, and a spring seat 13 is provided above the spring seat 12 in the figure, and is provided on the base B. The coil spring 14 is disposed between the two spring seats 12, 13 with a rebounding body.

The spring seat 12 is columnar and has a corrugated screw 12A formed at one end thereof. The rib screw 12A and the internal thread screw 11C provided at the end portion 11B of the detecting rod 11 are screwed. The corrugated screw 12A and the internal thread screw 11C are disposed in a direction orthogonal to the pin P. A segment portion 12B in which the end portion of the coil spring 14 is seated is formed in the intermediate portion of the spring seat 12, and a column portion 12C that is inserted into the inside of the coil spring 14 from the segment portion 12B is provided. In the spring seat 13, the corrugated screw 13A, the segment portion 13B, and the column portion 13C are formed in the same manner as the spring seat 12.

In a state where the end portion 11A of the detecting rod 11 and the valve body 7 are in contact with each other, the tips of the column portions 12C and 13C are in contact or in a state of being close to each other via a minute gap. On the other hand, when the valve body 7 is opened and becomes the state in which the end portion 11A of the detecting rod 11 and the valve body 7 are separated, as shown in Fig. 7, the end portion 11B of the detecting rod 11 receives the biasing force of the coil spring 14, and is pinned. P is a rotation axis and is rotated from the horizontal downward side, whereby the column portion 12C moves in a direction away from the column portion 13C. Normally, the front ends of the column portions 12C and 13C are placed in contact with or close to each other in order to prevent the switch pressing piece 15 or the contact member 16 from being broken by the abnormal rotation of the end portion 11B of the detecting rod 11. In other words, for example, even if foreign matter is caught between the end portion 11A of the detecting rod 11 and the valve body 7, the end portion 11A of the detecting rod 11 is caused to rotate from the horizontal partition wall 4 side, because the column portion 12C and the column portion are caused. The interference occurs in the 13C, so that the detection rod 11 can be restricted from rotating.

The coil spring 14 normally biases the end portion 11B of the detecting rod 11 toward the lower side in the drawing. Therefore, although the end portion 11A on the opposite side of the end portion 11B is biased toward the upper side in the drawing, that is, the direction in which the valve body 7 is opened, the biasing force of the coil spring 14 is that the valve body 7 does not open. The degree of weakness.

Further, at the end portion 11B of the detecting rod 11, the contact member 16 which is in contact with the switch pressing piece 15 is fixedly disposed. The contact 16 biases the switch pressing piece 15 in a direction away from the limit switch 17. The contact member 16 is provided to be sandwiched by the above-described spring seat 12 and the end portion 11B of the detecting rod 11.

The delay mechanism 18 is disposed in a direction in which the contact member 16 biases the switch pressing piece 15 to be biased. The delay mechanism 18 functions to delay the operation of the switch pressing piece 15, and adopts a configuration using an air damper or an oil damper. The operation of the delay mechanism 18 will be described later.

The pin P which is pivotally supported by the detecting rod 11 shown in Figs. 4 to 8 is disposed so as to intersect with the center of the hole 20 which is in the shape of a plate and has the ring 21 of the hole 20 at the center. On one side of the buckle 21, a groove-shaped bearing 21A for receiving the pin P is engraved. The pin P is configured to be protruded outward from the bearing 21A by a washer 27 to be described later.

The buckle 21 is disposed between the base B of the casing 2 and the extension block 22. The extension block 22 is a member that connects the body 1 and the housing 2. The extension block 22 can also be formed integrally with the body 1 of the flowing water detecting device A, and is formed integrally to reduce the number of parts, thereby having the effect of reducing the cost. On the other hand, as shown in the present embodiment, the casing 2 is formed by a single element, whereby the casing 2 can be treated as a single element, and the casing 2 can be separated from the main body 1. Check or replace.

A plurality of bolt through holes 221 for connecting the plurality of bolts to the body 1 are drilled in the extension block 22. Moreover, although not shown, the main body 1 is provided with the internal thread screw at a position corresponding to the bolt through hole 221.

A hole 22A communicating with the secondary side chamber II of the body 1 is formed inside the extension block 22, and a segment 22B formed at the intermediate portion of the hole 22A is provided with a buckle 21 via the sealing member 23. This sealing member 23 is an inside of the body 1 in which the inside of the casing 2 is liquid-tightly filled with water.

A groove 22C is formed on the surface of the extending block 22 on the side of the casing 2 as a "buckle holding means" for holding the retaining ring 21 at a predetermined position, and is engaged with the projection 21B provided on the outer peripheral surface of the retaining ring 21, The retaining ring 21 is held at the predetermined position of the extension block 22. Therefore, the positional deviation or the positional change of the buckle 21 can be prevented, and the axis of the pin P of the bearing 21A provided in the buckle 21 can be horizontally arranged to be orthogonal to the direction of the water flow flowing in the flow detecting device A. Therefore, the end portions 11A, 11B of the detecting rod 11 axially supported by the pin P can perform a rocking motion parallel to the direction of the water flow.

In addition to this embodiment, the engagement structure of the buckle 21 and the extension block 22 may be provided on the outer shape side of the buckle 21, and the corresponding engagement protrusion may be formed on the extension block 22, or the buckle 21 may be The outer shape is formed in a polygonal shape, and the fitting block 22 also forms a fitting recess of the same shape. Alternatively, the buckle 21 and the extension block 22 may be disposed at a predetermined position and fixed by a plurality of small screws or the like.

The sealing member 23 is cylindrical and formed of a material having elasticity such as rubber, and is deformable by the rotation of the detecting rod 11. The detecting rod 11 is inserted into the cylindrical portion of the sealing member 23. The sealing member 23 may be embedded in the detecting rod 11 at the time of molding the sealing member 23 and formed as an integrally formed body. When the surface of the sealing member 23 on which the detecting rod 11 is provided is embossed, the sealing member 23 is prevented from coming off.

At the end of the seal member 23 on the side of the collar 21, a thin flange portion 24 that is expanded in a direction orthogonal to the axis of the tubular portion is formed. At a peripheral portion of the flange portion 24, a projecting portion 25 having a convex shape that protrudes toward the extending block 22 side is formed, and the protruding portion 25 is sandwiched by the retaining ring 21 and the extending block 22.

Even if a load is applied to the sealing member 23 due to the rotation of the detecting rod 11, the sealing member 23 is elastically deformed by the elasticity of the flange portion 24, and cracking can be prevented. Further, since the protruding portion 25 of the peripheral edge of the flange portion 24 is sandwiched and fixed by the retaining ring 21 and the extending block 22, it is possible to prevent the sealing member 23 from being detached due to the rotating operation of the detecting rod 11, and an accident of water leakage occurs.

A cylindrical jig H is disposed between the flange portion 24 and the extension block 22. When the flowing water detecting device A is installed, the secondary pipe is filled with water, but at this time, the compressed air remains in the secondary pipe due to the influence of the air bag. Since this compressed air is a cause of lowering the sensitivity of the detected flow of the flow detecting device A, the secondary pipe may be evacuated by a vacuum pump after the water is filled to remove the residual air. However, due to the evacuation of the secondary piping, the sealing member 23 is pulled in the direction of the secondary side chamber II of the body 1, and may be separated from the normal mounting position. When the sealing member 23 is deviated from the normal mounting position, the airtightness of the secondary piping may not be maintained. The jig H is used to limit the abnormal movement of the sealing member 23. Therefore, one end of the jig H is disposed so as to be in contact with or close to the flange portion 24. Further, the segment portion is provided on the outer peripheral portion of the jig H, and is made to engage with the segment portion 22B of the extension block 22 to prevent abnormal movement of the jig H itself and the sealing member 23.

The inner peripheral portion of the jig H is expanded to a funnel-shaped taper shape toward the main body 1, and the detecting rod 11 which is formed and rotated is not interfered. The hole shape of the inner peripheral portion of the jig H is formed into a perfect circular shape. For example, it is preferable to form the long hole H1 as shown in the embodiment shown in Fig. 9. The long hole H1 has an advantage of being able to restrict the rotation of the detecting rod 11 in the orthogonal direction of the water flow direction by forming the width slightly larger than the outer diameter of the detecting rod 11. In other words, in the flowing water detecting device A, the rotation of the detecting rod 11 in conjunction with the opening of the valve body 7 controls the generation of the signal of the limit switch 17. However, when the detecting rod 11 is rotated while being oscillated in the orthogonal direction of the water flow direction, the amount of rotation of the detecting rod 11 and the amount of rotation of the valve body 7 cannot be correctly matched, and the generation of the signal of the limit switch 17 may be changed. However, in this embodiment, this possibility can be avoided. Further, by rotating the detecting rod 11 to the both end portions in the longitudinal direction of the long hole H1, the amount of rotation (angle) when rotating in parallel with the water flow direction can be restricted.

Two washers 26 and 27 into which the detecting rod 11 is inserted are attached between the flange portion 24 of the sealing member 23 and the retaining ring 21. The two washers 26 and 27 are placed in contact with each other in a state of being in contact with each other. By interposing such washers 26, 27, the contact faces of the washers 26, 27 slide with each other when the detecting bar 11 is rotated, thereby making the turning action of the detecting bar 11 smooth, while reducing the rotation of the detecting bar 11 The load acting on the flange portion 24.

The gasket 27 that is in contact with the buckle 21 is a flange portion 24 of the sealing member 23 that is subjected to water pressure by a flat surface having no unevenness. Without the washer 27, the flange portion 24 may break due to the water pressure from the body 1 side, and the flange portion 24 may break into the bearing 21A of the buckle 21, but the unevenness of the buckle 21 including the bearing 21A may not be caused by the washer 27. In the embodiment in which the flange portion 24 is exposed, such a defect does not occur. Therefore, the outer diameter of the washer 27 is made equal to the outer diameter of the flange portion 24. On the other hand, the inner diameter of the washer 27 is such a size as to produce a gap which does not hinder the rotation of the detecting rod 11.

The gasket 26, which is in contact with the sealing member 23, has an inner diameter substantially equal to that of the detecting rod 11, and an outer diameter smaller than the gasket 27. In the absence of the gasket 26, although the flange portion 24 which is subjected to the water pressure may break into the gap between the gasket 27 and the detecting rod 11, it may be broken, but the gasket 26 which is substantially equal in diameter and the detecting rod 11 is plugged. In the present embodiment of the gap, such a defect does not occur.

A resin coating is applied to the surfaces of the gaskets 26, 27. The resin coating is applied to improve the lubricity between the gaskets 26 and 27. When the detecting rod 11 rotates, the sliding operation between the washers 26 and 27 becomes smooth, and the rotation of the detecting rod 11 is not hindered. . In addition to the resin coating layer, a plating treatment or coating or a film having a function of smoothing the sliding operation between the gaskets 26 and 27 may be applied.

One side of the flange portion 24 of the sealing member 23 and one side of the buckle 21 passing through the washers 26, 27 are provided in parallel, and the flange portion 24 and the projection portion 25 are opposed to the washer 27 when the flange portion 24 receives the water pressure in the body 1. The zoom drive unit 22 is in close contact with each other, and the water stop effect is improved.

Further, on the opposite side of the buckle 21 and the base B, a segment 30 is formed from the periphery of the hole 20 in the direction of the base B, the segment 30 being inserted into the hole B1 of the base B, and considering the setting and the base B The positional relationship of the upper limit switch 17 and the like becomes appropriate. Further, the hole in the segment portion 30 is formed in a tapered shape that is enlarged toward the end portion 11B of the detecting rod 11, so that the inner peripheral surface of the segment portion 30 does not interfere when the detecting rod 11 performs the turning operation.

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. The handle for opening and closing the drain valve 3 is provided on the front side and is disposed at a position where the handle is easy to handle.

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

The flow detection device A is installed in the fire-fighting equipment piping, and the primary-side chamber I is connected to a water supply device such as a pump (not shown), a water storage tank, and the like, and is connected to a water source, and is provided at the end of the pipe to which the secondary chamber II is connected. Sprinkling faucet.

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 of the main body 1 of the flowing water detecting device A are also in a state of being filled with water. 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. The detecting rod 11 which is in contact with the valve body 7 is also in a substantially horizontal state.

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 closed, the valve body 7 is pushed up by the water pressure of the primary chamber I, and the valve rod 9 is used as a fulcrum.

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 biasing force of the coil spring 14 with the pin P as a fulcrum. As shown in Fig. 7, the end portion 11B of the detecting rod 11 on the side of the casing 2 is horizontally downward. Turn.

Therefore, the contact 16 on the end portion 11B side of the detecting rod 11 is separated from the restriction switch pressing piece 15, and the restriction switch pressing piece 15 starts to move in the direction of approaching the restriction switch 17. After the predetermined time elapses, the delay mechanism 18 restricts the switch pressing piece 15 from reaching the limit switch 17, and causes the limit switch 17 to operate, and is connected to the administrator's room via a wire connected to the terminal block located in the casing 2. The monitoring device transmits a signal of the limit switch 17.

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

Next, the operation and effect of the flowing water detecting device A of the present embodiment will be described except for those already described.

In the running water detecting device A, the "holding member" for holding the pin P of the detecting rod 11 in parallel with the valve rod 9 of the valve body 7 includes: a retaining ring 21; and an extending block 22 for holding the retaining ring 21, and borrowing The bolt is mounted to the body 1. Further, in the buckle 21 and the extension block 22, as the "rotation restricting portion", the projection 21B and the groove 22C are provided, and these members are in contact with each other. Therefore, the pin P which becomes the rotating shaft of the detecting rod 11 can be set to be always parallel with the valve rod 9 which becomes the valve shaft of the valve body 7, and since the detecting rod 11 does not contact the valve body 7 and is in contact, the detecting rod can be made The amount of displacement when turning 11 always becomes a fixed value. Therefore, it is possible to accurately detect that water flow has occurred inside the pipe and the valve body 7 is opened, based on the rotational displacement of the detecting rod 11, and it is possible to realize the flow detecting device A having high reliability of the operation detection. In particular, it is possible to realize a flow-type water detecting device A having a high reliability of motion detection, which can also be applied to a relatively large 65 A (2-1/2") to 200 A (8") standing in a general building. caliber.

The flowing water detecting device A includes a coil spring 14 as a "biasing means" for biasing the detecting rod 11 in a direction in which the valve body 7 is opened. Therefore, even if the rotation of the detecting rod 11 and the rotation of the valve body 7 are interlocked, even if the running water is detected, the detecting rod 11 does not apply a closing load to the valve body 7, so that it can also be applied at this point. The flow valve type detection device A of the action valve type having high reliability in the detection of large-diameter motion.

Next, other embodiments of the flowing water detecting device A of the present embodiment will be described except for those already described.

In the above-described embodiment, the engagement structure of the projection 21B of the detent ring 21 and the groove 22C of the extension block 22 is described, and the rotation of the buckle 21 is prevented, and the pin P of the shaft detecting rod 11 and the valve of the valve body 7 are fixed. The rod 9 is parallelized, but as shown in Fig. 10, for example, a projection 21B may be formed on the opposing surface of the base B of the casing 2 of the buckle 21, and the base B may be formed to engage with the projection 21B. The hole (not shown) prevents the rotation of the buckle 21 and the pin P by the engagement structure of the rotation restricting portions.

In the above-described embodiment, an example is described in which the pin P of the shaft detecting rod 11 is held by the bearing 21A formed in the retaining ring 21. However, as shown in Fig. 11, for example, a retaining pin is formed on the base B of the casing 2. The recess for the bearing of P, and the retaining ring 21 may not be used.

In the above-described embodiment, an example in which the two washers 26 and 27 are attached between the flange portion 24 of the sealing member 23 and the buckle 21 will be described. However, as shown in FIGS. 12 and 13 The embodiment does not use washers 26, 27.

In other embodiments, in the other embodiment shown in Fig. 12, the sealing member 23 made of a rubber-like elastic body such as ruthenium rubber forms a cylindrical projecting portion that locks the hole 20 of the buckle 21 without using the gasket 26. In the above-described embodiment, the gap 26 is set between the washer 27 and the detecting rod 11 in order to avoid obstructing the rotational displacement of the detecting rod 11, and the washer 26 is used to prevent the sealing member 23 from entering the gap. However, in the present embodiment, The configuration is not a configuration in which the rotational displacement of the detecting rod 11 is allowed by the gap, but a configuration in which the rotational displacement of the detecting rod 11 is allowed to be allowed by the elastic deformation of the sealing member 23, and the washer 26 is not used. The protruding portion provided in the sealing member 23 of the present embodiment is formed in a through hole (not shown) of the insertion pin P in a direction orthogonal to the cylindrical axis of the protruding portion.

Further, in the other embodiment shown in Fig. 13, the number of parts is reduced without using the washers 26 and 27 themselves. In other words, in the present embodiment, the bearing 21A having the groove shape that holds the pin from the base B side of the casing 2 is formed in the buckle 21 . In the above-described embodiment using the washer 27, in order to prevent the flange portion 24 of the seal member 23 from being invaded by the groove-shaped bearing 21A formed in the buckle 21 due to the water pressure on the main body 1 side, it is broken as the cover of the bearing 21A. , use washer 27. However, in the embodiment shown in Fig. 13, since the bearing 21A is not faced to the flange portion 24 of the sealing member 23, it is formed as a groove that is opened on the side of the base B, so that such a defect can be avoided. On the other hand, the gasket 27 is not used, and a cylindrical projection similar to that of Fig. 12 is formed in the sealing member 23, whereby the gasket 26 is not used. Further, instead of the groove-shaped bearing 21A opened on the side of the base B as shown in Fig. 13, and the hole penetrating in the direction orthogonal to the cylinder axis of the buckle ring 21, the washers 26 and 27 may be omitted. . Further, in the protruding portion provided in the sealing member 23 shown in Fig. 13, a through hole (not shown) in which the pin is inserted is formed in a direction orthogonal to the cylindrical axis of the protruding portion.

[Industrial Applicability]

The present invention can be applied to a flow switch in addition to a flow detecting device having a check valve structure, which is provided with a paddle at the tip end of the detecting rod, detects a swinging motion of the paddle caused by the running water in the pipe, and outputs a signal.

1. . . Ontology

2. . . Casing

3. . . Drain valve

4. . . partition

5. . . Connecting hole

6. . . Seat

7. . . Valve body

8. . . Bearing

9. . . Valve rod

10. . . Protruding

11. . . Detection rod

12, 13. . . Spring seat

14. . . Coil spring

15. . . Limit switch press

16. . . Contact

17. . . Limit switch

18. . . Delay mechanism

C. . . cover

I. . . Primary side chamber

II. . . Secondary side chamber

B. . . Base

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 the line X-X of Fig. 1.

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

Fig. 4 is an enlarged cross-sectional view showing a portion of the casing of Fig. 3.

Fig. 5 is an enlarged cross-sectional view showing the buckle of Fig. 4 and its peripheral portion.

Fig. 6 is an enlarged cross-sectional view showing the sealing member of Fig. 5 and its peripheral portion.

Fig. 7 is an enlarged cross-sectional view showing a state in which the detecting bar of Fig. 5 is rotated as the valve body is opened.

Figure 8 is a partial assembly diagram of the extension block and the buckle.

Fig. 9 is an explanatory view showing an embodiment in which the hole shape of the jig is a growth hole.

Fig. 10 (a) and (b) are explanatory views showing other embodiments of the buckle.

Fig. 11 is an explanatory view showing an embodiment of a casing for holding a pin.

Fig. 12 is an enlarged cross-sectional view showing another embodiment of the sealing member and the gasket.

Figure 13 is an enlarged cross-sectional view showing another embodiment of the sealing member.

Fig. 14 is a cross-sectional view showing an example of a conventional flowing water detecting device.

1. . . Ontology

4. . . partition

5. . . Connecting hole

6. . . Seat

7. . . Valve body

8. . . Bearing

9. . . Valve rod

11. . . Detection rod

C. . . cover

I. . . Primary side chamber

II. . . Secondary side chamber

B. . . Base

Claims (17)

A flowing water detecting device comprising: a tubular body, a valve body having a swing check valve structure, and a valve shaft; the detecting rod is disposed to penetrate from the inside to the outside of the body, and rotates in conjunction with opening and closing of the valve body; a pin that rotates the detecting rod shaft; and a switching means that outputs a signal according to the rotation of the detecting rod; characterized in that it comprises a holding member that maintains the axial direction of the pin at a position intersecting with the water flow direction; The holding member is provided with a rotation restricting portion that blocks the clockwise and counterclockwise rotation of the body. The flowing water detecting device according to claim 1, further comprising a sealing member having a tubular portion through which the detecting rod is inserted and a flange portion that is expanded in a vertical direction with respect to a shaft of the tubular portion. The flow detecting device of claim 1, wherein the holding member is a retaining ring having a groove or a hole for retaining the pin and an extending block for holding the retaining ring and being mounted to the body; the rotation restricting portion is disposed on the retaining ring and the extending block Protrusions and recesses facing opposite faces. The flowing water detecting device of claim 3, further comprising a casing, wherein the switching means is disposed on the body. The flow detecting device of claim 1, wherein the holding member is a buckle having a groove or a hole for holding the pin and a switch facing the buckle. The casing of the means; the rotation restricting portion is a protrusion and a recess provided on the opposing faces of the buckle and the casing. The flow detecting device according to claim 1, wherein the holding member is a housing having a groove or a hole for holding the pin and a switching means is provided inside; the rotation restricting portion is a protrusion provided on an opposite surface of the housing and the body; Concave. A flow detecting device according to claim 1, which comprises a biasing means for biasing the detecting rod in a direction in which the valve body is opened. The flow detecting device of any one of claims 4 to 6, wherein the basket system is foldable to the body. The flow detecting device according to any one of claims 3 to 5, wherein a sealing member is provided in the buckle, and the sealing member has a cylindrical portion inserted into the detecting rod and is perpendicular to an axis of the cylindrical portion The flange portion is expanded in the direction, and one side of the flange portion is disposed in parallel with one side of the buckle. The running water detecting device of claim 9, wherein the peripheral edge of the flange portion is sandwiched by the buckle and the extension block. A flow detecting device according to claim 9, wherein two washers are interposed between the flange portion of the sealing member and the retaining ring, and the one faces of the two washers are brought into contact with each other. A flow detecting device according to claim 11, wherein a coating is applied to the surface of the gasket. Such as the flow detection device of claim 2, which includes A cylindrical jig that restricts movement of the sealing member toward the body side. A flow detecting device according to claim 13 wherein the shape of the hole of the jig is a long hole. The flow detecting device according to any one of claims 4 to 6, wherein the front end of the casing side of the buckle is inserted into a hole drilled in the casing. The flow detecting device according to any one of claims 4 to 6, wherein the rebounding body is disposed at an end of the casing side of the detecting rod, and the rebounding body is mounted on the spring seat disposed on the detecting rod and disposed on the casing The spring seat is provided with a rotation amount limiting means for limiting the amount of rotation of the detecting rod at the spring seat. A running water detecting device according to claim 1, wherein the flange portion is formed at a front end of the detecting rod on the body side, and the flange portion has a rounded corner.