KR100694783B1 - Water flow detecting device for fire extinguishing facilities - Google Patents

Abstract

The subject of this invention is obtaining the oil-water detection apparatus for fire-fighting equipment which can adjust easily, such as valve body opening / closing strength.

A water flow detection device for fire extinguishing equipment, wherein the valve body is pivotally supported in a valve container so as to be opened and closed by a shaft, and the valve body is opened by the flow of water from the primary side to the secondary side of the valve container to operate the switch. One end of the shaft protrudes out of the valve container, and the shaft outside the valve container is provided with a conversion mechanism for converting the rotational motion of the shaft accompanying the opening and closing operation of the valve body into a linear motion perpendicular to the shaft, and opening the valve body. Pressing means for providing an actuating member which performs a linear motion converted by the converting mechanism and actuates a switch based on the actuation, and applies a pressing force in a direction opposite to the direction of movement of the operating member, and a pressing force of the pressing means can be adjusted. Provide means of coordination.

Description

Water flow detection device for fire extinguishing equipment {WATER FLOW DETECTING DEVICE FOR FIRE EXTINGUISHING FACILITIES}

BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing of the side surface of the water-flow detection device for fire-fighting equipment of 1st Embodiment which concerns on this invention.

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

FIG. 3 is a sectional view taken along the line Y-Y in FIG. 2, showing the valve body closed state. FIG.

4 is a cross-sectional view taken along the line Y-Y in FIG. 2, showing a valve body open state.

FIG. 5 (a) is a front view showing the alarm switch operating mechanism of the water flow detecting device for fire extinguishing equipment according to the second embodiment of the present invention, and FIG. 5 (b) is a side view of (a).

It is a front view which shows the alarm switch mechanism of the water-flow detection device for fire-fighting equipment of 2nd Embodiment which concerns on this invention, and is a figure which shows a valve body open state.

It is a side view which shows the structure of the screw vicinity for adjusting the valve body opening-closing strength of the said apparatus.

It is a figure which shows the whole structure of the sprinkler installation in a collective house.

<Explanation of symbols for the main parts of the drawings>

1: water flow detection device

1a: valve acceptor

8: valve body shaft

9: valve body

14: pinion gear

16: rack gear

16c: operating part

17: guide guide

18, 35: valve body opening and closing strength adjustment screw

20, 36: spring for adjusting the valve body opening and closing strength

22, 37: alarm switch

23, 37a: switch control panel

30: arm

31: guide rail

32: switch operation

32 ': tapered surface

The present invention is, for example, suitable for use in sprinkler equipment for an apartment house and the like, and relates to an oil-and-water detection apparatus for fire extinguishing equipment that can easily adjust the valve body opening and closing strength.

Conventionally, as shown in FIG. 8, a sprinkler facility for a general collective house is provided with a plurality of sprinkler heads 40 for each furniture of each floor of the collective house, and each head 40 of each household has sprinkler pipes 40. ') Is connected to the secondary side of the running water detection device 1, and the digestion water pipe 41 is connected to the primary side of the running water detection device 1, and each pipe 41 is connected to the ground floor of the collective house. It is provided and connected to the water storage tank 44 through the pressurized water pump 42 and the pressure retention pump 43 in this strata. Moreover, the pressure tank 45 and the pressure switch 46 which can detect the pressure drop in the said pipe 41 through the pressure tank 45 are connected to the said pipe 41. In FIG. 8, reference numeral 47 denotes an auxiliary water tank of the digestive water disposed on the roof.

In the sprinkler system, all of the pipes are filled with water in the boundary operation, and a positive pressure (0.1 MPa or more at the furthest from the pressure pump 42) is applied by the pressure maintaining pump 43, and any furniture ( When a fire occurs in P), the nozzle of the sprinkler head 40 "is automatically foamed by heat, and the extinguishing water filled in the pipe 40 'is discharged from the head 40". In one household P, the reed switch and the like of the water flow detecting device 1 are turned on, thereby causing a fire alarm and the like. In addition, the pressure switch 46 detects the decrease in the internal pressure of the pipe based on the foaming of the head 40 ", and the pressurized water pump 42 is started based on the ion, and the reservoir 44 in the pipe 41 is turned on. Extinguishing water is pressurized and returned, and the extinguishing water is waterproofed from the sprinkler head 40 "to perform extinguishing activity.

As the water flow detection device 1 in such a sprinkler facility, a device as disclosed in Patent Documents 1 and 2 has been proposed. These devices utilize the so-called rotation of the valve body of the check valve, protrude the shaft of the valve body of the check valve out of the check valve container, and arrange an alarm switch through a cam mechanism at the shaft end, and the sprinkler head ( When the valve body is rotated due to the decrease in the secondary pressure of the check valve by opening the valve, the cam mechanism is turned on by the cam mechanism to operate the alarm based on the rotation of the shaft of the valve body. It is.

<Patent Document 1> Japanese Patent Application Laid-Open No. 10-142251

<Patent Document 2> Japanese Unexamined Patent Publication No. 2002-65885

By the way, what was disclosed in the said patent document 1 provides a spring between the plate surface of a cam board, and the arm provided in the front-end | tip of a valve body shaft, and transmits the rotation of the said shaft to the said arm when the valve body is opened. The cam plate is rotated through the spring by the rotation of the arm, and the alarm switch is turned on by the rotation of the cam plate, thereby preventing a malfunction caused by a small amount of water when leaking or checking. However, since the structure of the said patent document 1 is very complicated and it is difficult to adjust the tensile strength of the said spring, there exists a problem that adjustment of the opening / closing strength of a valve body, and adjustment of the ON timing of an alarm switch are difficult.

The patent document 2 discloses that a cam is provided at the tip of the shaft of the valve body, a lever rotated by the cam, and the alarm switch is turned on by the lever. A magnet that prevents rotation is attracted to this lever, and the alarm switch is turned on by rotation of this lever only when a force greater than the attraction force of this magnet acts on this lever. Unless a predetermined pressure is applied, the alarm switch is not turned on, thereby preventing malfunction of the water flow detection device due to flow rate change. However, as disclosed in Patent Document 2, there is a problem that it is difficult to adjust the adsorption force of the magnet, and similarly to Patent Document 1, it is difficult to adjust the opening and closing strength of the valve body and to finely adjust the operation timing of the alarm switch.

This invention is made | formed in view of said each conventional subject, Comprising: It aims at providing the oil-water detection apparatus for fire-fighting equipment which can adjust the opening / closing strength of a valve body easily with a simple structure.

In order to achieve the above object, the present invention,

Firstly, the water flow detection system for fire extinguishing equipment which pivotally supports a valve body in a valve container so as to be opened and closed by a shaft, and opens the valve body by the flow of water from the primary side to the secondary side of the valve container to operate the switch. In the apparatus, one end of the shaft protrudes out of the valve container, and the shaft outside the valve container converts the rotational motion of the shaft accompanying the opening and closing operation of the valve body into a linear motion perpendicular to the shaft. And an operating member configured to operate the switch by performing the linear motion converted by the conversion mechanism on the basis of the opening operation of the valve body, and further, the movement direction of the operating member. A pressing means for imparting a pressing force in an opposite direction to the It is comprised by the flow-water detection apparatus for fire-fighting equipment which provided the adjustment means which can be adjusted.

The conversion mechanism is, for example, a pinion gear 14 of the shaft 8 and a rack gear 16 meshing with the gear or an arm 30 connected to the shaft 8 and a switch actuated linearly by the arm. It can comprise with the piece 32. The actuating member can be configured as a rack gear 16 or the like having an actuating portion 16c at its tip, and in the latter case as a switch actuating piece 32 or the like having a tapered surface 32 '. The pressing means is, for example, a valve body opening strength adjustment spring 20 connected to the rack gear 16, and the adjustment means is provided by a valve body opening and closing strength adjustment screw 18 capable of stretching the spring 20. Can be configured. In such a configuration, the linear movement of the operating member is adjusted instead of the rotational movement of the shaft in order to adjust the valve body opening and closing strength and the like, so that the adjustment is easy and the biasing means and the adjustment means can be simply configured.

As a second aspect, the switch has a switch operating portion that is turned on by the operating member performing the linear movement, thereby contacting the operating member and moving in a direction crossing the linear movement direction. It is comprised by the oil-water detection apparatus for fire-extinguishing equipment.

Therefore, when the operating member performs linear movement, the switch operating portion is turned on, for example, in a direction intersecting the movement direction by contacting the side surface of the operating member, for example, so that it is necessary to accurately adjust the operating stroke of the operating member. It is possible to realize a water-flow detection device having no configuration and easy device configuration. Here, the crossing direction is a concept including the direction orthogonal to the direction of movement of the operating member.

As a 3rd, the said conversion mechanism is a mechanism comprised by the pinion gear provided in the said shaft, and the rack gear which meshes with this pinion gear, Comprising: The water flow detection device for fire-extinguishing facilities as described in said 1 or 2 characterized by the above-mentioned. do.

The switching mechanism of claim 4, wherein the conversion mechanism performs linear movement along the guide rail by rotation of the arm provided on the shaft, the guide rail in a direction orthogonal to the shaft, and the arm based on the rotation of the shaft. It is an apparatus comprised from the said, It is comprised by the flow-water detection apparatus for fire-fighting equipment of the said 1st or 2nd term | claim.

As a fifth aspect, the urging means is a spring connected to the operation member, and the adjustment means is an adjustment screw capable of elastic adjustment of the spring. It is composed.

Therefore, in order to adjust the said pressing force, it can adjust very easily, for example by turning the head of an adjustment screw with a Phillips screwdriver etc.

In addition, although the code | symbol in embodiment is shown in parenthesis corresponding to the structure of this invention, this is shown for convenience in order to make a correspondence clear, The structure of this invention is not limited to the structure in embodiment.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of the water flow detecting apparatus which concerns on this invention is described in detail.

1 to 3 show the water flow detecting device 1 according to the first embodiment of the present invention, in which reference numeral 1a denotes a valve container as a check valve container, and the secondary side ( B; water flow path (arrow E direction) exiting to the sprinkler side is formed, and the primary water flow path 2 has a primary side attachment flange 4 and a secondary water flow path for connecting to the primary pipe 41; The secondary side attachment flange 5 for connecting to the secondary side piping 40 'is formed in (3).

Reference numeral 6 is a ring-shaped valve seat provided on the outlet side of the primary side flow path 2 in the valve container 1a, and a threaded portion 6a is formed on the outer circumference thereof. It is attached to the attachment screw part 2a of the outlet of the primary side flow path 2 by screwing.

Reference numerals 7a and 7b (see FIG. 2) denote a pair of bosses provided on the inner wall of the valve container 1a on the outlet side of the primary flow channel 2 in the valve container 1a, and the secondary on the primary side. It is provided to face in the direction orthogonal to the flow direction (arrow E direction) to the side. These bosses 7a and 7b are provided with support holes 7a 'and 7b' for inserting and supporting the valve body shaft 8, respectively, and the support holes 7b 'penetrate the valve container 1a. It is opened by the opening 7b "at the side of this container 1a (refer FIG. 2).

Reference numeral 8 denotes the valve body shaft, which is inserted from the opening 7b "until its end reaches the end of the support hole 7a ', and is on the support hole 7b' side. The bearing 10 provided is rotatably supported in the said support hole 7a ', 7b'.

Reference numeral 9 denotes a valve body as a check valve for closing the primary-side flow path 2, which supports the valve body 9a and the body 9a, and has a pair of perforations formed therethrough. It consists of support arms 9b and 9b. The valve body 9 moves the valve body shaft 8 from the opening 7b "to the support arm 9b while the support arms 9b and 9b are disposed between the bosses 7a and 7b. 9b) is pivotally supported by the valve body shaft 8 in the directions of arrows C and D by inserting through the support holes 7a 'and 7b' through the respective through holes (see FIG. 2). Moreover, when the said valve body shaft 8 and the said support arms 9b and 9b are fixedly attached and the said valve body 9 rotates around the said valve body shaft 8 as a support shaft, the said valve body It is comprised so that the said valve body shaft 8 may also rotate simultaneously with the rotation of 9. The valve body 9 is arrange | positioned at the outlet side of the primary side flow path 2, and the valve body ( The valve seat 6 can be closed on the secondary side by 9), and the so-called check valve is comprised.

One end of the valve body shaft 8 protrudes out of the valve container 1a through the opening 7b ″, and is inside the box 11 through the boss portion 11a of the switch box 11 described later. Rotation is prevented from rotation by the release prevention nut 12 arrange | positioned at the inside. In addition, in FIG. 2, the code | symbol R is an O-ring for water indexes.

Reference numeral 11 denotes a switch box for storing the alarm switch 22 to be described later and its operation mechanism, and is fixed by the boss portion 11a to the box attachment portion of the side surface 1a 'of the valve container 1a ( And the valve body shaft 8 is configured to be positioned in the box 11 through the opening 13 of the boss portion 11a.

Next, the alarm switch drive mechanism in the box 11 will be described.

Reference numeral 14 denotes a fan-type pinion gear having an opening angle of 90 degrees (see FIG. 3), which is inserted through and fixed to the distal end of the valve body shaft 8 and is detachably screwed to the distal end of the valve body shaft 8. The separation prevention is prevented by the prevention nut 15. Therefore, this pinion gear 14 rotates in the same direction as this shaft 8 with the rotation of the said valve body shaft 8. The pinion gear 14 has a gear portion 14a in a fan-shaped arc portion, and as shown in FIG. 3, the valve body 9 in the valve container 1a closes the valve seat 6. When in the horizontal state, that is, in the closed state of the valve body 9, the upper surface 14b is angled to maintain the horizontal state and then fixed to the shaft 8.

Reference numeral 16 denotes a rack gear (operating member), which has the gear portion 16a on one side of the pinion gear 14 side, and the valve body shaft in the guide rail 17 fixedly installed in the box 11. It is inserted and supported so that it can slide to an up-down direction orthogonal to (8). The gear portion 16a of the rack gear 16 is always engaged with the pinion gear 14, and the rod-shaped operation portion 16c for operating the alarm switch 22 to be described later on the upper end of the rack gear 16. ) Is integrally formed with the rack gear 16. Therefore, when the pinion gear 14 rotates in the arrow C direction or the D direction by this configuration, the rack gear 16 is guided to the guide rail 17 while being moved up and down linearly in the arrow H direction or the arrow I direction. It is configured to.

Moreover, the up-down slit 17a is formed in the side surface on the opposite side to the pinion gear 14 of the said guide rail 17 over a predetermined range. In addition, a fastening piece 16b to which one end of the valve body opening and closing strength adjustment spring 20 is fastened protrudes in a horizontal direction on a side opposite to the gear part 16a of the rack gear 16. 16b is located outside the guide rail 17 via the slit 17a.

Reference numeral 18 is a valve for adjusting the opening and closing strength of the valve body, and is screwed to the female thread angle 19 fixed to the lower end of the guide rail 16, and the spring for adjusting the valve body opening and closing strength is provided at the distal end of the adjusting screw 18. The other end of 20 is fixed. Accordingly, the spring 20 is in a state of being tightly installed between the fastening piece 16b and the end of the adjusting screw 18. By this configuration, the spring 20 is connected through the fastening piece 16b. The rack gear 16 is always pressed in the direction of arrow I (the direction opposite to the direction of motion of the rack gear 16 (the reverse direction to the direction of motion), that is, the closing direction of the valve body 9). Therefore, the pressing force of the arrow I direction (direction which prevents rotation of the opening direction) of the said spring 20 acts on rotation of the said valve body 9 in the opening direction.

Reference numeral 21 denotes a spring protection cover having one end fixed to the female screw portion 19, and the cover 21 substantially covers the entire outer circumference of the spring 20 in the closed position of the valve body 9 of FIG. Consists of.

With this configuration, the pressing force in the arrow I direction of the spring 20 acts as a resistance to the opening direction of the valve body 9. The spring 20 is rotated by rotating the head of the valve body opening / closing strength adjusting screw 18 by a Phillips screwdriver or a flathead screwdriver, thereby changing the distance from the distal end of the adjusting screw 18 to the fastening piece 16b. It is configured to adjust the pressing force of).

For example, in the closed state (the state of FIG. 3) of the said valve body 9, ie, the rack gear 16 stopped in the position of FIG. 3, the adjusting screw 18 is turned to the right and the said screw 18 is carried out. Is inserted into the female thread angle 19, the tip portion of the screw 18 approaches the fastening piece 16b, whereby the spring 20 can be reduced thereby reducing the pressing force. That is, it can adjust to the direction which makes small the resistive force which prevents the opening of the said valve body 9. On the other hand, when the adjusting screw 18 is turned to the left to shift the screw 18 away from the female screw angle 19, the distance between the distal end of the screw 18 and the engaging portion 16b increases. As a result, the spring 20 is extended to increase the pressing force. That is, only by rotating the said adjustment screw 18, it can adjust easily in the direction which enlarges the resistive force which prevents the opening of the said valve body 9. In this way, by adjusting the pressing force of the spring 20, it is possible to very easily adjust how much water flow the valve body 9 is opened.

Reference numeral 22 denotes an alarm switch provided in the box 11 at an upper position of the pinion gear 14, and is constituted by a so-called limit switch. In the alarm switch 22, reference numeral 23 denotes a switch operation portion, an arm portion 23b for supporting the tip roller 23a, the roller 23a by the support shaft 23b ', and the arm portion. It is comprised by the spring 23c which presses 23b in a switch-off direction. And as shown in FIG. 3, the said leading roller 23a is comprised so that it may be located close to the operation part 16c of the rack gear 16. As shown in FIG. Therefore, when the valve body 9 is opened, the pinion gear 14 rotates in the direction of arrow C, and the rack gear 16 slides upward (arrow H direction), the tip roller 23a The switch operating section 23 rotates in the direction of the arrow J, that is, the direction intersecting the linear sliding direction of the rack gear 16 (operation section 16b), whereby the alarm switch 22 is turned on.

In this way, the operation direction of the switch operation unit 23 of the alarm switch 22 is set in the direction intersecting or perpendicular to the movement of the operation unit 16b of the rack gear 16 in the linear direction. When turning on (23), there is no need to set the stroke of the rack gear 16 correctly, and if there is a stroke required to turn on the alarm switch 22 at least in contact with the switch operation section 23, If the stroke is longer, no problem. Therefore, when turning on the alarm switch 22, the fine adjustment of the stroke of the rack gear 16 is not needed.

Since this invention is comprised as mentioned above, the operation | movement is demonstrated next.

(1) the state of fire alert

The water flow detecting device 1 according to the present invention is disposed in each furniture of the collective house shown in FIG. 8, a primary pipe 41 is connected to the primary flange 4, and a secondary to the secondary flange 5. A sprinkler pipe 40 'serving as a side pipe is connected, and the pipes 41 and 40' and the inside of the oil / water detection device 1 are filled with digestive water, and the positive pressure is maintained by the pressure holding pump 43 (0.1 MPa at the end). It is assumed that the state of the fire boundary to which the above) is applied is maintained.

In addition, the pressure of the valve body opening / closing strength adjusting spring 20 is adjusted to an appropriate size by turning the valve body opening / closing strength adjusting screw 18 of the water flow detecting device 1 to the right or the left side using a tool such as a driver. . In this boundary state, the primary side and the secondary side of the water flow detector 1 have the same pressure, and the valve body 9 does not necessarily have to be in a completely closed state, but the valve body opening / closing strength adjustment spring 20 The pressing force in the direction of arrow I always receives the pressing force in the closing direction. Therefore, in this state, even if a small amount of water flow from the primary side to the secondary side is caused by any cause, the valve body 9 does not easily rotate in the opening direction, thereby preventing malfunction in such a boundary state. have.

(2) Operation in case of fire

In this fire boundary state, for example, a fire occurs in the area P of FIG. 8, and when a specific sprinkler head (e.g., sprinkler head 40 ") is foamed by this fire, it is filled in the pipe 40 '. Extinguishable extinguishing water is discharged from the head 40 ", whereby the secondary pressure of the water flow detection device 1 is lowered, and thus the water flow from the primary side to the secondary side in the flow water detection device 1 (arrow E direction). Occurs.

Then, the valve body 9 in the valve container 1a rotates in the arrow C direction by the water flow due to the water flow. At this time, the shaft 8 also rotates in the same direction in conjunction with the rotation of the valve body 9, whereby the pinion gear 14 rotates in the direction of the arrow C, thereby accompanying the rotation of the pinion gear 14. While the rack gear 16 is guided to the guide guide 17, the rack gear 16 linearly moves in the direction of arrow H while counteracting the pressing force of the valve body opening / closing strength adjusting spring 20. Therefore, the valve body 9 rotates in the arrow C direction against the pressing force (arrow I direction) of the spring 20.

Then, in the movement process of the rack gear 16, the switch operating portion 23a of the alarm switch 22 is in contact with the operation portion 16c of the rack gear 16, the rack gear 16 Accompanied by the further straightness of the switch operating portion 23a is pivotally pressed in a direction intersecting with the movement direction of the rack gear 16, the time when the valve body 9 is rotated to the position of Figure 4, that is, rack gear The alarm switch 22 is turned on by the switch operation part 23a at the position where 16 is linearly moved to the position of FIG. As a result, the alarm can be activated to alert the occupant that a fire has occurred.

In addition, the pressure drop of the pipes 40 'and 41 based on the foaming of the head 40 "is detected by the pressure switch 46 through the pressure tank 45, and the pressurized water pump 42 is based on this detection. Is driven, whereby the digested water is pressure-received from the reservoir 44 in the pipe 41, and the delivered digested water continues to flow through the valve body 9 in the open state. 40 ") and the like, and extinguishing is continued.

As described above, in the water flow detecting device 1 according to the present invention, a pressing force is applied to the valve element 9 in the closing direction so as to prevent a malfunction in the event of a fire alert, and in the event of a fire, the rotational movement of the valve element 9 is performed. Since the alarm switch 22 is turned on by the linear motion of the operating members such as the rack gear, and the linear motion of the operating member, the rack gear 16 is used to adjust the opening and closing strength of the valve body. Since a pressing force is applied to the linear motion of the operation member such as), the opening and closing strength of the valve body can be adjusted with a very simple structure. In addition, the adjustment can also be easily performed by a tool such as a driver. For example, if a tool insertion hole such as a driver is provided at a position opposite to the screw head of the valve body opening / closing strength adjusting screw 18, the serviceability is further improved. You can.

In addition, since the switch operating portion 23 is in contact with the operating portion 16c by the linear movement of the operating portion 16c and moves (rotates) in the direction intersecting the linear movement, the switch 22 is turned on. When the alarm switch 22 is turned on, the movement stroke of the actuating section 16c, that is, the rack gear 16, should be a stroke necessary to turn on the switch 22, and it is not necessary to adjust it accurately. This makes it possible to realize a water flow detection device having a very simple structure while preventing malfunction.

In addition, in FIG. 1, the code | symbol 1b is the maintenance opening / closing cover provided in the side surface of the valve container 1a, and as shown in FIG. It is fixed in the exponential state in 1a). In FIG. 2, reference numeral 11b is a maintenance opening / closing cover provided on the side of the switch box 11, and as shown in FIG. 3, four screw holes are shown at four corners of the switch box by four bolts. It is fixed to 11.

Next, 2nd Embodiment which concerns on this invention is described based on FIG. In the drawings of these second embodiments, the same parts as those in the first embodiment will be denoted by the same reference numerals and the description thereof will be omitted for convenience. Since the structure of the valve body 9 inside the valve container 1a shown in FIG. 1 and FIG. 2 is the same as that of the said 1st embodiment in 2nd Embodiment, description of this part is abbreviate | omitted for convenience. In this 2nd Embodiment, the operation mechanism of the alarm switch in the said switch box 11 differs from the said 1st Embodiment.

In the same figure, the shaft 8 of the said valve body 9 is located in the said box 11 similarly to the said 1st Embodiment via the boss | hub part 11a of the switch box 11. As shown in FIG. At the end of the shaft 8 an arm 30 for moving the switch operating piece 32 is inserted through its one end through-hole 30a, which arm 30 is at the tip of the shaft 8. The separation prevention nut 15 is fixed to prevent separation. The other end of the arm 30 is formed with a long hole 30b through which the protruding pin 33 of the switch operating piece 32 to be described later is fastened.

Reference numeral 31 is a guide rail formed linearly in the direction orthogonal to the shaft 8 on the inner upper portion of the boss portion 11a, and reference numeral 32 is a switch operating piece for operating the alarm switch 37 to be described later (operating member). ) And a support portion 32a having a fastening pin 33 fastened to the long hole 30b of the arm 30, and a tapered surface 32 gradually rising from the support portion 32a toward the alarm switch. The guide rail 32c which is provided with the operation part 32b which has'), and which is slidable along the guide rail 31 and which is prevented from coming off in the front direction is integrally formed on the back side. . Therefore, such a switch operating piece 32 is capable of reciprocating linear motion along the guide rail 31 in the direction of arrow J, K (direction perpendicular to the shaft 8).

Reference numeral 34 denotes an angle for supporting the screw for adjusting the valve body opening / closing strength, and as shown in Fig. 7, the entire body is L-shaped, and the lower end attachment portion 34a is the inner surface 11 of the switch box 11. It is screwed to ") and is fixed to this inner side 11" as shown in FIG.

Reference numeral 35 denotes a valve body opening / closing strength adjustment screw inserted into the transmission hole 34b of the upper end of the angle 34, reference numeral 36 denotes a valve body opening / closing strength adjustment spring, and one end 36a of this spring 36 ) Is fastened to an end of the adjustment screw 35, and the other end 36b of the spring 36 is fastened to a fastening pin 30c protruding from the plate surface of the arm 30. The spring 36 is in this configuration always biased against the arm 30 in the direction of the pressing force in the direction of the arrow K (i.e., the direction opposite to the movement direction of the switch operating piece 32 as the actuation member (the reverse direction to the movement direction). ), And a pressing force in the direction of closing the valve body 9 (arrow D direction).

As shown in FIG. 7, the plurality of ring portions 36a 'on one end 36a side of the spring 36 are strongly coupled to the thread 35a of the adjusting screw 35, and the adjusting screw 35 ) Is not separated from Further, by turning the screw 35 to the right, the end 36a is shifted in the direction of the arrow K, whereby the length of the spring 36 can be extended to increase the pressing force in the valve body closing direction. On the other hand, by turning the adjusting screw 35 to the left side, the one end 36a is shifted in the direction of the arrow J, whereby the length of the spring 36 can be reduced to reduce the pressing force in the valve body closing direction. In this way, the valve body opening and closing strength can be adjusted very easily by rotating the adjusting screw 35 with a driver or the like.

Reference numeral 37 denotes an alarm switch, which is arranged and fixed at an upper position of the switch operation piece 32. In the alarm switch 37, reference numeral 37a is a switch operation portion, which is located at a position opposite to the support portion 32a of the operation piece 32, and the switch operation piece 32 moves linearly in the arrow J direction. The switch operating portion 37a is configured to be pressed against the tapered surface 32 'of the operating portion 32b to move on in a direction intersecting with the linear movement direction of the switch operating piece 32 (orthogonally). (See Figure 6).

Since 2nd Embodiment is comprised as mentioned above, the operation | movement is demonstrated below.

(1) the state of fire alert

In the fire alert state, similarly to the first embodiment, the primary side and the secondary side have the same pressure, and the valve body 9 is always in the closing direction due to the pressing force in the arrow K direction of the valve body opening / closing strength adjustment spring 36. The direction of arrow D). Therefore, in this state, even if a small amount of water flow from the primary side to the secondary side is caused by any cause, the valve body 9 does not easily rotate in the opening direction, thereby preventing malfunction.

(2) Operation when fire occurred

For example, if a fire occurs in the area P of FIG. 8, and the sprinkler head (for example, the sprinkler head 40 ") is fired by the fire, the water flow detection device 1 is similar to the first embodiment. Water flow (arrow E direction) from the vehicle side to the secondary side occurs.

And the valve body 9 in the valve container 1a rotates in the arrow C direction by water flow by the said water flow. At this time, the shaft 8 also rotates in the same direction as the valve body 9 rotates, whereby the arm 30 counters the pressing force in the arrow K direction of the valve body opening / closing strength adjustment spring 36. It rotates to the C direction, and the switch operating piece 32 linearly moves along the guide rail 31 to the arrow J direction by this.

In the process of moving the switch operation piece 32, the tapered surface 32 ′ of the operation piece 32 presses the switch operation part 37 a of the alarm switch 37, whereby the switch operation part is operated. The alarm switch 37 is turned on by moving 37a in the direction (intersecting direction) orthogonal to the linear movement direction of the switch operating piece 32 (see FIG. 6). As a result, the alarm can be activated to alert the occupant that a fire has occurred.

Further, pressure is transmitted from the digestion water by the drive of the pressurized water pump 42, and the waterproofing from the sprinkler head 40 "and the like is the same as in the first embodiment.

In this way, also in the water-flow detection device of the second embodiment, a pressing force is applied to the valve element 9 in the closing direction so as to prevent a malfunction in the event of a fire alert, and when a fire occurs, the rotational movement of the valve element 9 is operated. Since the alarm switch 37 is turned on by the linear motion of the member and the linear motion of the actuating member, when the opening and closing strength of the valve body is adjusted, the pressing force is applied to the linear motion of the actuating member. Since it is good to act, adjustment of the opening and closing strength of the said valve body can be performed with a very simple structure. In addition, the adjustment can also be easily performed by a tool such as a driver as in the first embodiment. For example, if a tool insertion hole such as a driver is provided at a position facing the screw head of the valve body opening / closing strength adjusting screw 35, It can improve the maintainability more.

Moreover, the switch operation part 37a contacts the switch operation piece 32 (taper surface 32 ') by the linear movement of the switch operation piece 32 (taper surface 32') as an operation member, and performs the said linear motion. Since the switch 37 is turned on by moving in the direction orthogonal to it, it is not necessary to adjust the movement stroke of the switch operating piece 32 very precisely in turning on the alarm switch 37. In addition, a water flow detection device having a simple structure can be realized while preventing malfunction.

According to the present invention, since the opening and closing operation of the valve body is converted to linear motion to operate a switch such as an alarm switch, when the opening and closing strength of the valve body is adjusted, a pressing force is applied to the linear motion of the operating member. The mechanism related to the pressure and the adjustment mechanism can be configured very simply.

Moreover, the water flow detection device which can also perform the adjustment easily can be realized.

Claims (5)

A water flow detection device for fire extinguishing equipment, wherein the valve body is pivotally supported in a valve container so as to be opened and closed by a shaft, and the valve body is opened by the flow of water from the primary side to the secondary side of the valve container to operate the switch. One end of the shaft protrudes out of the valve container, and the shaft on the outside of the valve container has a conversion mechanism for converting the rotational motion of the shaft accompanying the opening and closing operation of the valve body into a linear motion perpendicular to the shaft. Attach, Moreover, based on the opening operation | movement of the said valve body, the operation member which performs the said linear motion converted by the said conversion mechanism, and operates the said switch is provided, Further, there is provided a pressing means for applying a pressing force in a direction opposite to the movement direction of the operating member, and an adjusting means for adjusting the pressing force of the pressing means, And said pressing means is a spring connected to said actuating member, and said adjusting means is an adjusting screw capable of stretching and adjusting said spring. 2. The fire extinguishing system according to claim 1, wherein the switch has a switch operating portion which is turned on by the operating member performing the linear movement and in contact with the operating member and moving in a direction crossing the linear movement direction. Water flow detector. The water flow detection device for fire extinguishing equipment according to claim 1 or 2, wherein the conversion mechanism is a mechanism composed of a pinion gear provided on the shaft and a rack gear engaged with the pinion gear. The said conversion mechanism is a straight line along the said guide rail by rotation of the arm provided in the said shaft, the guide rail of the direction orthogonal to the said shaft, and the said arm based on the rotation of the said shaft. A water flow detection device for fire extinguishing equipment, characterized in that it is a mechanism composed of a switch operating piece for exercising. delete

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