JPH07269522A - Signal delay device - Google Patents

Abstract

PURPOSE:To provide the signal delay device which surely functions at all time, and has no fear of electric faults. CONSTITUTION:The device is equipped with moving members 27 and 29 which are supported by a diaphragm 31 held within an air chamber, and are moved by external force within the air chamber, an air flow rate adjusting means 34 which is interposed between the air chamber and an air inlet port 33, and adjusts an air flow rate sucked in the air chamber, an air releasing means 35 which releases air when air pressure within the air chamber exceeds a definite value, and with an actuation means 36 which takes out the movements of the moving members 27 and 29.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal delay device for a water flow detection device used in, for example, a sprinkler fire extinguishing facility.

[0002]

2. Description of the Related Art An example of a commonly used closed-type sprinkler fire extinguishing system is shown in FIG. 1 is a water tank, 2 is a water tank 1
, A check valve 5 connected to the downstream side of the water supply pump 2, 5 a pressure air tank connected to the water supply pipe 4 on the downstream side of the check valve 3, Is a pressure switch.

Reference numerals 7a, 7b and 7n are water sprinkling pipes installed on each floor of the building, for example, which are connected to the water supply pipe 4 and have a check valve 8 and a pressure switch 11 for detecting water flow (alarm device) 10. The sprinkler head 9 is attached to each of these via the. Water for extinguishing fire is always supplied to each sprinkler head 9, but water is not sprinkled. Reference numeral 18 is a receiver to which a signal from each water flow detection device 10 is added.

FIG. 3 shows an example of the water flow detection device 10 described above. Reference numeral 12 denotes an inlet (primary side) connected to the sprinkler pipes 7a, 7b, 7n (hereinafter sometimes simply referred to as reference numeral 7), 1
Reference numeral 3 denotes an outlet (secondary side) connected to the sprinkler head 9 via the water sprinkler 7, and a chamber 14 is formed between the two. 15 is a valve seat provided on the primary side of the chamber 14, 16
Is a small hole with one end opening to the valve seat 15 and the other end opening to the outside. Reference numeral 17 denotes a valve body whose one end is rotatably pivoted, and closes the space between the primary side 12 and the chamber 14 and the small hole 16 when the chain is opened (the position shown by the solid line in the figure). 11 is connected to the eyelet 16,
It is a pressure switch operated by water pressure from the chamber 14.

In the running water detection device 10 as described above, the water pressure P ₁ on the primary side and the water pressure P ₂ on the secondary side are always equal (P ₁ = P ₂ ) at all times (monitoring state), so the valve element 17 is a valve. It is crimped to the seat 15 to block the primary side and the secondary side, and the small hole 16 is also closed.

Now, when a fire occurs on a certain floor, the sprinkler head 9 in the vicinity of the fire operates to sprinkle water. As a result, the water pressure of the sprinkler pipe 7 is reduced to P ₁ > P ₂ , so that the valve body 17 of the water flow detection device 10 rotates as shown by the broken line to connect the primary side and the secondary side, and to supply water. Water is supplied to the sprinkler head 9 from the inside of the pipe 4. At this time, the small hole 16 is also opened by the rotation of the valve body 17, so that the water in the chamber 14 is removed from the small hole 1.
6 is sent to the pressure switch 11, and the water pressure causes the pressure switch 11 to operate to send the signal to the receiver 18.

Upon receiving this signal, the receiver 18 displays where the fire has occurred and issues an alarm if necessary. Further, since the pressure in the pressure air tank 5 decreases due to the sprinkler head 9 sprinkling water, the pressure switch 6 that detects this sends a signal to the receiver 18, and the receiver 18 that receives this signal sends a control signal to the water pump 2. Is driven to send water to the sprinkler head 9.

By the way, in the sprinkler fire extinguishing facility as described above, for example, the pipe may leak water or the air may enter the pipe. In such a case, even if the sprinkler head 9 does not operate, the running water detection device 10
The pressure switch 11 may output a signal due to pressure fluctuations on the primary side. Therefore, a delay device is added to the water flow detection device 10 so that a signal (alarm) is issued only after the pressure drop on the secondary side continues for a certain period of time, and an electric timer is normally used as the delay device. .

[0009]

[Problems to be Solved by the Invention] Conventional running water detection device 1
When a fire occurs and the sprinkler head 9 operates, 0 is detected by the water flow detection device 10 as described above, and the pressure switch 11 is operated via the delay device to notify the receiver 18 of a fire signal. Are being sent. However, since an electric timer is used for the delay device, not only the electric wiring equipment becomes complicated, but also there is a possibility that insulation failure or conduction failure may occur due to water leakage, dust accumulation, and the like.

The present invention has been made to solve the above problems, and an object of the present invention is to obtain a signal delay device that always functions reliably and does not cause an electrical failure.

[0011]

A signal delay device according to the present invention is arranged between a movable member supported by a diaphragm held in an air chamber and moved in the air chamber by an external force, and between the air chamber and an air suction port. Provided with air amount adjusting means for adjusting the intake air amount, air releasing means for releasing the air when the air in the air chamber exceeds a certain pressure, and actuating means for taking out the movement of the movable member Is.

Further, the signal delay device according to the present invention is a movable member which has a bottomed hole, a chamber provided in the middle of the bottomed hole, a diaphragm installed in the chamber, and which moves in the bottomed hole by an external force. A spring interposed between the movable member and the bottom of the bottomed hole, an air suction port communicating with the bottomed hole and the chamber via a needle valve, a relief valve communicating with the bottomed hole and the chamber, And an actuating plate for taking out the movement of the movable member to the outside.

[0013]

When an external force is applied to the movable member, the movable member descends in the air chamber, and the operating means attached thereto also descends to turn on (or turn off) the limit switch, for example. At this time, the air in the air chamber is discharged from the air discharging means. When the external force applied to the movable member is removed, the movable member rises in the air chamber and turns off the limit switch (or O
N) At this time, the rising speed of the movable member can be adjusted by adjusting the amount of air sucked into the air chamber by the air amount adjusting means, and thus the operation of the operating means can be delayed.

[0014]

1 is a vertical sectional view of an embodiment of a signal delay device according to the present invention. Reference numeral 21 denotes a lower body, and a concave portion 22 having a substantially triangular pyramid shape is formed on the upper surface thereof, and a bottomed hole 23 is provided at the center thereof. Reference numeral 24 denotes an upper body, and a lower surface of the lower body 21 is formed with a substantially pyramidal recess 25 facing the recess 22 of the lower body 21, and a through hole 26 is provided at the center thereof.

Reference numeral 27 is a first movable member slidably inserted in the bottomed hole 23 of the lower body 21, and a screw hole 28 is provided at the center thereof. 29 is a through hole 2 of the upper body 24
The second movable member 6 is slidably inserted in the inner surface of the screw 6, and a screw rod 30 is provided on the lower surface of the second movable member. Reference numeral 31 is a diaphragm. In this diaphragm 31, the screw rod 30 of the second movable member 29 is inserted into a hole provided in the center thereof, and the first movable member 27 is screwed into the screw hole 28 of the first movable member 27. The diaphragm 31 and the second movable member 29 are integrally connected.

In the bottomed hole 23 of the lower body 21, the first
Of the upper body 24 is fitted in the second movable member 29, and the peripheral portion of the diaphragm 31 is sandwiched between the two bodies 21, 24 by bolts or the like. Are joined together. As a result, between the lower body 21 and the upper body 24, a substantially rhombic chamber having the diaphragm 31 is formed by the recesses 22 and 25, and an air chamber is formed by the recess 22 and the bottomed hole 23. . A spring 32 is interposed between the bottom of the bottomed hole 23 and the first movable member 27, and biases the first movable member 27, the diaphragm 31, and the second movable member 29 upward.

Reference numeral 33 denotes an air suction port provided in the lower main body 21, which has a vent passage (not shown) provided in the bottomed hole 23 and the first movable member 27 via a needle valve 34 as an air amount adjusting means. It communicates with the concave portion 22 via the. 35 is a bottomed hole 2
3 and the ventilation path provided in the first movable member 27 (not shown)
It is a check valve type relief valve that constitutes an air discharge means that communicates with the recess 22 via the. Reference numeral 36 is an operating plate which is an operating means attached to the second movable member 29, and 37 is a wheel-shaped actuator provided above the second movable member 29, for example, in the running water detection apparatus 10 shown in FIG. The lever 19 that moves up and down in conjunction with the valve opening or closing operation of the valve body 17 comes into contact, and an external force is applied. A switching device 40, such as a limit switch, is installed in the vicinity of the signal delay device 20, and the actuator 41 has a second movable member 29.
The actuating plate 36 provided at the abutting portion abuts.

Next, the operation of the signal delay device 20 configured as described above will be described. Now, when the lever 19 is lowered in the direction of the arrow a (downward) by the external force, that is, the valve closing operation of the valve body 17, the second movable member 29 is lowered through the actuator 37 of the signal delay device 20, and the second movable member 29 is moved. Member 29
Lowers the first movable member 27 against the spring 32.
Therefore, the diaphragm 31 is formed in the recess 22 of the lower body 21.
The air in the concave portion 22 and the bottomed hole 23 is pressure-bonded to the bottom surface of the and is discharged through the relief valve 35.

As a result, the operating plate 36 attached to the second movable member 29 is at the position indicated by the chain line, and the limit switch 40
The actuator 41 of the
0 is maintained in the ON state. At this time, no signal is output from the limit switch 40.

When the external force is removed, that is, when the lever 19 moves in the direction of arrow b due to the valve opening operation of the valve body 17, the second
The movable member 29, the diaphragm 31, and the first movable member 27 are urged by the spring 32 to slide upward, and along with this, the operating plate 36 also moves as shown by the solid line. As a result, the operating plate 36 causes the actuator 4 of the limit switch 40 to move.
The limit switch 41 is turned off after being separated from 1, and outputs a signal.

The rising speed of the second movable member 29, and hence the operating plate 36, at this time is adjusted by adjusting the needle valve 34 of the air suction 33 to adjust the amount of air sent to the bottomed hole 23 and the recess 22. It can be adjusted. Therefore, by slowing the rising speed of the second movable member 29, the limit switch 40 does not operate immediately even if the lever 19 separates from the actuator 37, but can operate after a certain time has elapsed. On the other hand, since the relief valve 35 is provided in the bottomed hole 23, when the lever 19 moves in the direction of the arrow a, the air in the recess 22 and the bottomed hole 23 is released.
By discharging from 5, the second movable member 29, the diaphragm 31, and the second movable member 27 can descend without delay.

In the above embodiment, the limit switch 40 is normally ON and does not output a signal, and the movable member 27,
Although the case where the signal is turned off and the signal is output is shown when 29 is raised, the signal is not normally output when the movable member 27, 29 is lowered, but is turned on and the signal is output when the movable member 27, 29 is lowered. Good. Further, the limit switch 40 is provided by the operating plate 36 which is displaced by the movement of the movable members 27, 29.
Although the case of turning on and off is shown, other electric devices and fluid devices may be controlled. Furthermore, in the above description, the case where the signal delay device according to the present invention is provided in the water flow detection device of the sprinkler equipment is shown, but the present invention is not limited to this, and various signal delay devices are required. It can be implemented in equipment and devices.

[0023]

The signal delay device according to the present invention is provided between a movable member, which is supported by a diaphragm held in the air chamber and moves in the air chamber by an external force, and the air chamber, which is disposed between the air chamber and the air suction port. The air amount adjusting means for adjusting the amount of air sucked into the air chamber, the air discharging means for discharging the air in the air chamber when the air pressure exceeds a certain pressure, and the operating means for extracting the movement of the movable member to the outside Since it is configured as described above, there is no need for troublesome electric wiring and the like, and no electrical failure occurs. Therefore, it is possible to obtain a highly reliable signal delay device that can always function reliably even in a bad environment.

Further, a bottomed hole, a chamber provided in the middle of the bottomed hole, a movable member to which a diaphragm installed in the chamber is fixed and which moves in the bottomed hole by an external force, the movable member and the bottomed hole. The movement of the movable member and the air suction port communicating with the bottomed hole and the chamber via the needle valve, the escape valve communicating with the bottomed hole and the chamber, and the movable member to the outside. Since it is mechanically configured by the operation, the same effect as described above can be obtained.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of the present invention.

FIG. 2 is a schematic diagram showing an example of a sprinkler facility.

FIG. 3 is a schematic view of an example of a conventional running water detection device.

[Explanation of symbols]

 20 Delay Device 22, 25 Concave 23 Bottomed Hole 27 First Movable Member 29 Second Movable Member 31 Diaphragm 32 Spring 33 Air Suction Port 34 Needle Valve 35 Relief Valve 36 Working Plate 37, 41 Actuator 40 Limit Switch

Claims (2)

[Claims] 1. A movable member, which is supported by a diaphragm held in an air chamber and moves in the air chamber by an external force, and is arranged between the air chamber and an air suction port, and is sucked into the air chamber. An air amount adjusting means for adjusting the amount, an air releasing means for releasing the air in the air chamber when the air pressure exceeds a certain pressure, and an operating means for taking out the movement of the movable member, Signal delay device. 2. A bottomed hole, a chamber provided in the middle of the bottomed hole, a movable member to which a diaphragm installed in the chamber is fixed and which moves in the bottomed hole by an external force, the movable member and the bottomed hole. The movement of the movable member and the air suction port communicating with the bottomed hole and the chamber via the needle valve, the escape valve communicating with the bottomed hole and the chamber, and the movable member to the outside. A signal delay device comprising an operating plate.