JP2010057809A - Pre-actuation type water flow detector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attain simplification and space saving of piping for supplying water from primary piping to secondary piping and to prevent misoperation of a collateral apparatus disposed surrounding a valve at the time of inspection or maintenance, with respect to a pre-actuation type water flow detector where a valve is opened with an operation signal of a fire sensor installed in the vicinity of a sprinkler head. <P>SOLUTION: In the pre-actuation type water flow detector, a bypass 14 communicating with a primary side and a secondary side is bored inside a boss 15 formed outside the valve box, and a supply valve 16 which opens or closes the bypass 14 is provided on the boss 15 while opening and closing operation is possible. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a pre-actuated running water detector installed in a pre-actuated sprinkler facility.

The pre-actuated water flow detector is installed on the pipe of the pre-actuated sprinkler equipment, the primary side is connected to the primary side pipe with a water source, and the secondary side is connected to the secondary side pipe with the sprinkler head installed. It is connected. The valve body inside the pre-actuated water flow detection device is always closed, and the valve body is opened by an operation signal of a fire detector installed in the vicinity of the sprinkler head.

Therefore, even if the sprinkler head is accidentally activated during a non-fire, only the fluid in the secondary side pipe is discharged from the activated sprinkler head, and in particular, the secondary side pipe is filled with air or incombustible gas. In some cases, there is no substantial damage to indoor furniture and fixtures, so it is effective in places where museums and precision machinery are installed. However, since the gas filled in the secondary side pipe is slightly reduced in pressure over time, it is necessary to replenish the filled gas up to the original pressure range, so a supply device such as a compressor is required and the equipment is installed. The cost was high.

On the other hand, when the secondary side pipe is filled with water, if the sprinkler head malfunctions, water is released, but the amount is limited to the water in the secondary side pipe. Therefore, damage caused by water damage can be reduced to some extent. Also, the water to be filled in the secondary side pipe can be easily supplied from the primary side pipe having a water source, and the cost for the equipment can be reduced compared to the case where the secondary side pipe is gas. It is a fire extinguishing facility that has been attracting attention in recent years.

The conventional pre-actuated sprinkler system in which the secondary side pipe is filled with water is such that the pressure of the secondary side pipe where the sprinkler head is installed is set lower than the pressure on the primary side having a water source. (For example, refer to Patent Document 1). In the open valve described in Patent Document 1, the valve body is always closed, and the valve body is opened by the operation of the fire sensor.

In order to make the pressure on the secondary side lower than the pressure on the primary side, the open valve is provided with a pressure regulating pipe that communicates water supply to the secondary side pipe from the primary chamber to the secondary chamber, An electric valve that opens and closes in conjunction with a pressure switch capable of detecting the pressure in the secondary chamber is provided on the pressure adjusting pipe. Specifically, when the pressure drop on the secondary chamber side is detected by the pressure switch, the motor-operated valve opens, and the water in the primary chamber flows into the secondary chamber through the pressure regulating pipe. The motor-operated valve is closed when the pressure on the secondary chamber side recovers.

Japanese Patent No. 3884146

The pre-actuated running water detection device described above is provided with two systems of pressure regulation pipes capable of supplying water from the primary chamber to the secondary chamber, and thus requires a space for providing pipes for two systems around the valve. It was a thing.

Also, around the valve box of the pre-actuated water flow detector, there are a lot of pipes communicating with the inside of the valve box and valves and other auxiliary equipment installed on the pipe. If the machine is operated by mistake, there is a risk that a fire alarm will be output in the building or that the pressure above the set pressure may be applied to the secondary piping. The work was done with great care in operating the equipment.

Therefore, in the present invention, in view of the above problems, the piping for replenishing water from the primary side piping to the secondary side piping is simplified and space-saving is achieved, and further, an accessory device arranged around the valve box at the time of inspection and maintenance is used. The purpose of the present invention is to provide a pre-operated running water detection device capable of preventing operation errors.

In order to achieve the above object, according to the first aspect of the present invention, the inside of the valve box is divided into a primary side chamber and a secondary side chamber by a partition, and a communication hole drilled on the partition is always closed by a valve body. A pipe provided with a sprinkler head is connected to the secondary side, and a fire detector installed in the vicinity of the sprinkler head is connected to a control device, and the fire detector is activated and controlled. In a pre-actuated flow detection device equipped with a flow signal generating means capable of generating a flow signal when the valve is opened by a signal input to the device, the primary side and the secondary side are communicated with each other. A pre-actuated running water detection device, wherein a bypass passage is provided in a valve box, and a supply valve capable of opening and closing the bypass passage is provided on the bypass passage.

According to a second aspect of the present invention, in the pre-operated running water detection device, the bypass passage is formed in a boss formed outside the valve box, and the supply valve can be opened and closed on the boss. The pre-operated flowing water detection device according to claim 1, wherein the pre-operated water flow detection device is provided.

According to a third aspect of the present invention, in the pre-actuated running water detection device, the bypass passage is located outside the boss intersecting with each hole drilled in the protruding direction of the boss from the primary side chamber and the secondary side chamber of the valve box. 3. The pre-actuated running water detection device according to claim 2, wherein a more perforated hole is provided.

The invention according to claim 4 is characterized in that, in the pre-actuated running water detection device, the drainage means of the secondary side chamber is provided on a surface different from the surface where the bypass passage and the supply valve are provided. Item 4. The pre-operated running water detection device according to Item 1 to 3.

According to a fifth aspect of the present invention, in the pre-operated running water detection device, a pressure gauge for displaying the pressure in the secondary side chamber is installed on the surface where the bypass passage is provided. This is a pre-actuated water detection device.

According to the first aspect of the present invention, the configuration of the pipes and valves installed outside the valve box is simplified by providing the bypass pipe in the valve box that communicates the primary side chamber and the secondary side chamber, and further space saving. Can be achieved.

According to the second aspect of the present invention, since the bypass passage is formed in the boss formed outside the valve box, the number of pipes installed outside the valve box is reduced, and the space can be saved.

According to invention of Claim 3, the hole which cross | intersects each hole drilled in the protrusion direction of the said boss | hub from the said primary side chamber and a secondary side chamber can be drilled from the exterior of a boss | hub.

According to the invention described in claim 4, for example, by providing a bypass structure on one surface of the valve box and installing drainage means on the opposite surface, one surface is the water supply operation side from the primary side chamber to the secondary side chamber, and the opposite surface is It can be divided into the drainage operation side of the secondary side chamber, and it has the effect of preventing the mistake of valve operation at the time of inspection and maintenance by the operator recognizing it.

According to the fifth aspect of the present invention, the pressure gauge that displays the pressure in the secondary side chamber is installed on the surface where the bypass passage is provided, so that when the water is supplied from the primary side chamber to the secondary side chamber, two It becomes easy to operate the supply valve while checking the pressure in the secondary chamber.

In carrying out the present invention, the structure of the pre-operated running water detection device may use a check valve of a lift type structure in which the valve body moves up and down on the valve seat, or a part of the valve body is pivotally supported. It is also possible to use a check valve having a swinging structure that can be rotated. The bypass passage is formed in a boss provided outside the valve box, and a supply valve capable of opening and closing the bypass passage is provided.

The bypass passage can be provided when the valve box is formed by casting, or can be provided by a cast-in technique in which a cylindrical material is cast at the time of casting. Or it can also be drilled with a drill etc. after valve box formation, and can also form combining these methods.

It is also possible to provide a supply valve operating handle on the boss. Also, drainage means such as drainage valves are placed on the opposite side of the valve box where the bypass passage is provided to prevent operator errors, or the handle color of the supply valve and the handle color of the drainage valve It is possible to make it different so that the worker can easily understand it.

Embodiments of the present invention will be described below with reference to FIGS. 1 is a cross-sectional view of the pre-actuated water flow detection device of the present invention, FIG. 2 is an external system diagram viewed from the lid side of the pre-actuated water flow detection device of FIG. 1, and FIG. FIG. 4 and FIG. 4 show the external view seen from the B direction of FIG.

In the pre-operated flowing water detection device of the present invention, the primary side is connected to a water source, and the secondary side is connected to a pipe provided with a sprinkler head. A fire detector is installed in the vicinity of the sprinkler head, and an operation signal of the fire detector is sent to the pre-actuated running water detection device via the control device to open the main valve body.

The pre-actuated running water detection device has a lift type structure in which the valve element moves up and down on the valve seat, and the inside of the valve box 1 is separated from the primary side chamber I and the secondary by the partition wall 2 as shown in FIG. A communication hole 3 that is partitioned into a side chamber II and that allows the primary side chamber I and the secondary side chamber II to communicate with each other is formed in an intermediate portion of the partition wall 2.

In the primary side chamber I, a valve body 4 capable of opening and closing the communication hole 3 is installed. The valve body 4 has a bottomed cylindrical shape, and is seated on a valve seat 5 whose bottom surface is the end surface of the communication hole 3. A flange is formed near the opening of the valve body 4, and the side surface of the flange is slidable along the inner surface of the cylindrical portion 6 formed in the primary side chamber I.

An end opening of the cylindrical portion 6 is closed by a lid 7. A spring 8 is interposed between the lid 7 and the valve body 4 to urge the valve body 4 toward the valve seat 5. A space formed by the valve body 4, the cylindrical portion 6, and the lid 7 is referred to as a control chamber 9, and fluid in the primary side chamber I is caused to flow through the check valve 10 and the orifice 11 through a pipe communicating the primary side chamber I and the control chamber 9. Filled through.

On the pipe connected to the drainage pipe D from the control chamber 9 shown in FIG. 2, there are an electric valve V1 that is normally closed and opened by the operation of a fire detector (not shown), and a manual valve V2 that is normally closed. Connected in parallel. The motor-operated valve V1 is electrically connected to a control device (not shown), and the aforementioned fire detector is also electrically connected to the control device.

When the motor-operated valve V1 is opened, the fluid in the control chamber 9 is discharged to the drain pipe D, the fluid pressure in the control chamber 9 decreases, the valve body 4 moves away from the valve seat 5, and the primary side chamber I and secondary The side chamber II is in a state where water can be passed.

The manual valve V2 is opened when it is desired to force the pre-actuated running water detection device to operate.

An annular space is formed in the back of the above-described valve seat 5 and is referred to as an intermediate chamber 12. From the intermediate chamber 12, passages 13 </ b> A and 13 </ b> B communicating with the outside of the valve box 1 are formed. A pressure switch PS, which is a flowing water signal generating means, is connected to the outside of the valve box of the passage 13A, and further connected to the drain pipe D through an orifice.

The passage 13B is connected to the primary chamber I by piping connected to the outside of the valve box, and a test valve TV is installed on the piping. The test valve TV is normally closed and is opened when the function of the pressure switch PS is confirmed. A pressure gauge for displaying the pressure in the primary side chamber I is provided on the primary side of the test valve TV.

The bypass passages 14A and 14B communicating the primary side chamber I and the secondary side chamber II have holes extending toward the boss 15 provided in the vicinity of the partition wall 2 and provided outside the valve box 1. The bypass passages 14A and 14B are drilled in parallel. A bypass passage 14C intersecting the bypass passages 14A and 14B is drilled from the outside of the boss 15 with a drill or the like, and the bypass passages 14A to 14C are communicated with each other. The opening of the bypass passage 14C is closed by the plug 14D.

The supply valve 16 that opens and closes the bypass passages 14A to 14C is installed in the boss 15, and an opening 15A that leads from the bypass passage 14A to the outside of the boss 15 is formed in the opening 15A. 14C communicates.

A valve seat 17 is provided at the boundary between the opening 15 </ b> A and the bypass passage 14 </ b> A, and the valve body 18 is arranged to be seated on the valve seat 17. One end of a valve rod 19 is attached to the valve body 18 on the side opposite to the seating surface of the valve seat 17, and the other end side of the valve rod 19 protrudes outside the boss 15 and a handle 20 is attached.

A male screw is screwed into the middle portion of the valve stem 19, and a bonnet 21 provided with a female screw that engages with the male screw is connected to the boss 15 to close the opening 15A. When the handle 20 is rotated, the valve stem 19 and the valve element 18 are moved by the male screw of the valve stem 19, and the bypass passage 14 can be opened and closed.

The drain valve 22 is connected to a passage 23 that leads from the secondary side chamber II to the outside of the valve box 1 and discharges the fluid in the secondary side chamber II.

The pressure gauge 24 for displaying the fluid pressure in the secondary side chamber II is provided on the surface on which the bypass passage 14 is disposed.

In the pre-actuated flowing water detection device having the above configuration, when the lid 7 is in front as shown in FIG. 2, the bypass passage 14, the supply valve 16, and the pressure gauges for the primary side chamber and the secondary side chamber are arranged on the left side in the drawing. On the right side, a drain pipe D and a pressure switch PS, an electric valve V1, a manual valve V2, and a drain valve 22 connected thereto are arranged.

With such a configuration, the operation of adjusting the fluid pressure in the secondary side chamber II can be performed by checking the pressure gauge 24 while operating the supply valve arranged on the left side during the water supply operation from the primary side chamber to the secondary side chamber. it can. In particular, when the pre-actuated water flow detection device is installed in a narrow place or when the size of the pre-action water flow detection device is large, workability is better if a pressure gauge is installed in the vicinity of the supply valve.

Next, the operation of the pre-operated running water detection device will be described with reference to FIG. FIG. 5 is a system diagram of a pre-actuated sprinkler facility in which the pre-actuated running water detector of the present invention is installed.

As shown in FIG. 5, the pre-actuated flowing water detection device of the present invention is configured such that the primary side of the valve box 1 is connected to the water source W by the primary side pipe 30 and the water from the water source 30 is pumped up by the pump P. The secondary side is connected to a secondary side pipe 32 provided with a sprinkler head 31, and the primary side and the secondary side pipe are filled with water. A fire detector 33 is installed in the vicinity of the sprinkler head 31, and an operation signal of the fire detector 33 is sent to the pre-operated running water detection device via the control device 34 to open the valve body 4.

The control device 34 is electrically connected to the fire detector 33, the motor operated valve V1 of the pre-actuated running water detection device, and the pressure switch PS, and monitors and controls each device.

During normal times, the valve element 4 of the pre-actuated running water detector is in a closed state, and the pressure in the secondary side chamber II is maintained within a predetermined range lower than the pressure in the primary side chamber I.

When a fire occurs, the fire detector 33 detects the fire and an operation signal is output to the control device 34. The control device 34 opens the electric valve V1. As the motor-operated valve V1 is opened, the water in the control chamber 9 flows out to the drain pipe D, and the fluid pressure in the control chamber 9 decreases.

When the fluid pressure in the control chamber 9 decreases, the valve body 4 moves away from the valve seat 5 and the communication port 3 becomes in a state in which the primary side chamber I and the secondary side chamber II can pass water, and the primary side chamber I and the secondary side chamber The pressure in II becomes the same pressure. When the valve body 4 moves away from the valve seat 5, water flows into the intermediate chamber 12, and when the water pressure is applied from the intermediate chamber 12 to the pressure switch PS through the passage 13A, the pressure switch PS is activated. And output a running water signal.

When the sprinkler head 31 installed on the secondary side of the pre-actuated water flow detection device is operated following the operation of the fire detector 33, the sprinkler in which the water in the secondary side pipe 32 connected to the secondary side chamber II is activated. It is discharged from the head 31 and uniformly dispersed in the room.

When water is discharged from the sprinkler head 31, not only the secondary side pipe 32 but also the inside of the primary side pipe 30 is depressurized. Therefore, the pressure switch SW provided on the primary side pipe 30 side is activated by the depressurization and the pump P is operated. The water of the water source W is started and supplied to the sprinkler head 31. And fire extinguishing is performed with the water sprayed continuously from the sprinkler head 31.

Next, a case where the sprinkler head 31 malfunctions will be described.

When the sprinkler head 31 is activated at the time of non-fire, water in the secondary side pipe 32 is discharged from the activated sprinkler head 31. Here, since the valve body 4 of the pre-actuated flow detection device is in a closed state, the water in the secondary side pipe 32 is only discharged from the sprinkler head 31 and the water discharge is stopped, and water is continuously discharged. Absent.

Next, the case where the sprinkler head 31 is activated before the fire detector 33 will be described.

The process is the same as described above until the sprinkler head 31 is actuated by a fire and the water in the secondary side chamber II and the secondary side pipe 32 of the pre-actuated water flow detector is discharged from the sprinkler head 31. When the fire detector 33 is activated following the operation of the sprinkler head 31, the valve body 4 of the pre-actuated flow detection device is opened to supply water from the primary side chamber I to the secondary side chamber II and also to the intermediate chamber 13. Water flows in and a flowing water signal is output from the pressure switch PS.

When the valve body 4 is opened, water is supplied from the primary side chamber I to the secondary side chamber II, and water is continuously discharged from the activated sprinkler head 4 and sprayed uniformly into the room to extinguish the fire.

Sectional view of the pre-actuated water detection device of the present invention Fig. 1 is a system diagram of the appearance of the pre-actuated water detection device as seen from the lid side. Enlarged cross-sectional view of the supply valve portion of FIG. External view seen from direction B in FIG. System diagram of a pre-actuated sprinkler facility in which the pre-actuated water detection device of the present invention is installed

Explanation of symbols

1 Valve box
2 Bulkhead
3 communication hole
4 Disc
7 Lid
8 Spring
9 Control room
12 Intermediate room
14A-14C Bypass passage
15 Boss
16 Supply valve
22 Drain valve
D Drain pipe PS Pressure switch
TV test valve
V1 motorized valve
V2 Manual valve

Claims (5)

The inside of the valve box is divided into a primary side chamber and a secondary side chamber by a partition, the communication hole drilled on the partition is always closed by a valve body, and a pipe with a sprinkler head is connected to the secondary side The fire detector installed in the vicinity of the sprinkler head is connected to the control device, and the valve body is opened by the signal input to the control device when the fire sensor is activated, and the valve body is opened. In the pre-actuated flow detection device equipped with a flow signal generating means capable of generating a flow signal when the water is discharged, a bypass passage communicating the primary side and the secondary side is provided in the valve box, and the bypass passage is opened and closed. A pre-operated running water detection device characterized in that a possible supply valve is provided on the bypass passage.
In the pre-operated running water detection device, the bypass passage is formed in a boss formed outside the valve box, and the supply valve is provided on the boss so as to be opened and closed. The pre-operated running water detection device according to claim 1.
In the pre-operated running water detection device, the bypass passage is provided with a hole drilled from the outside of the boss that intersects each hole drilled in the protruding direction of the boss from the primary side chamber and the secondary side chamber of the valve box. The pre-operated running water detection device according to claim 2, wherein
4. The pre-operation according to claim 1, wherein in the pre-operated running water detection device, a drainage means for the secondary side chamber is provided on a surface different from the surface on which the bypass passage and the supply valve are provided. Type running water detector.
5. The pre-actuated water flow detection device according to claim 4, wherein a pressure gauge for displaying the pressure in the secondary side chamber is installed on the surface on which the bypass passage is provided.

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