JPH07178194A - Transmission function test equipment for pressure detection means of automatic alarm valve - Google Patents

Abstract

PURPOSE:To make a pressure switch in an automatic alarm valve possible to conduct a transmission acknowledgement test without activating the automatic alarm valve. CONSTITUTION:This transmission function test equipment is provided with a switch valve 34 installed in the way of alarm piping 28 and 31, the first test piping 35 connected to the switch valve 34 and simultaneously to be connected to a drainage piping 30 of a drainage valve 26 connected to a valve main body 25 of an automatic alarm valve, the first closing valve 44 installed in the way of the first test piping 36, the second test piping to be connected to the primary side of the valve main body branched from the first test piping 35 on the pressure detection means 33 side of the first closing valve 44, and the secondary closing valve 49 installed in the way of the secondary test piping 48.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission function testing device in pressure detecting means of an automatic alarm valve which detects running water in a pipe due to water sprinkling from a sprinkler head and outputs an alarm signal.

[0002]

2. Description of the Related Art Conventionally, as an automatic alarm valve of this type, there is one as shown in FIG. In FIG.
Reference numeral 1 denotes an automatic alarm valve, which is usually composed of a valve body 2, a pressure switch 8 and a drain valve (parent-child valve) 9. Reference numeral 2 denotes a valve body, which has a valve disc 3 which is openably and closably provided, and a valve seat 4 which receives the valve disc 3. A pressure switch pressurizing port 5 is provided at a position of the valve seat 4 which is closed by the valve disc 3, and the pressure switch pressurizing port 5 is connected to an alarm pipe 6 and a pressure switch 8 is connected via a signal stop valve 7. It is connected to the. Further, the pressure switch pressurizing port 5 communicates with a drain pipe 10 provided on the drain valve 9 side through an automatic drip 11 having a function as a check valve.

A drain valve 9 is connected to the secondary side of the valve body 2 through a drain pipe 12, and a drain valve 9 is connected through an alarm pipe 6. The alarm pipe 6 branches in the middle, and the signal stop valve 7 and the pressure switch 8 are connected. Also,
The alarm pipe 6 is a drain pipe 10 via an auto drip 11.
It is connected to the. First, the primary pressure P on the water supply main side
1 and the secondary pressure P2 on the side of the sprinkler head are equal, the valve disc 3 of the valve body 2 is in the state of being closed by the valve seat 4 as shown in FIG. Therefore, the pressure switch 8 is the auto drip 1
It is opened to the drainage pipe 10 side through 1 and no pressure detection output is generated. That is, the pressure switch 8 is in the switch-off state, and the detection output of this switch-off state becomes the non-alarm output of the automatic alarm valve 1.

Next, when the sprinkler head is actuated by a fire, or when the test valve of the terminal testing device is opened for inspection, the valve as shown in FIG. The valve disc 3 of the body 2 opens. Therefore, the pressure switch pressurizing port 5 is opened and pressurized water is supplied to the pressure switch 8 from the alarm pipe 6, so that the switch is turned on, and the pressure switch 8 is turned on to generate a pressure detection output (alarm output).

Thereafter, the recovery work for stopping the alarm output is performed by manually closing the primary control valve provided on the primary side of the valve body 2, whereby the flowing water to the valve body 2 is stopped and the valve is closed. Disc 3 returns to normal condition, valve seat 4
Close. The pressurized water in the pressure switch 8 is discharged to the drainage pipe 10 via the auto drip 11. Thus
The pressure switch 8 is restored. The arrow A indicates the direction of flowing water, and the arrows B and C indicate the flow of pressurized water.

[0006]

However, in such a conventional automatic alarm valve, when the valve body of the automatic alarm valve operates when the operation of the sprinkler head or a phenomenon equivalent thereto appears. However, there is a problem in that pressurized water is sent to the pressure switch and the transmission function of the pressure switch can be confirmed. If the automatic alarm valve does not operate, the transmission function of the pressure switch cannot be confirmed. It was

The present invention has been made in view of such conventional problems, and an object of the present invention is to perform a test for confirming the transmission function of a pressure switch without operating an automatic alarm valve.

[0008]

In order to achieve the above object, according to the present invention, when the secondary side is depressurized and the valve body is pushed up, the running water from the primary side is continued and a part of it flows through the alarm pipe. An automatic alarm valve for driving a pressure detecting means is connected to a switching valve provided in the middle of the alarm pipe and a drain pipe of a drain valve connected to the switching valve and connected to a valve body of the automatic alarm valve. A first test pipe, a first on-off valve provided in the middle of the first test pipe, and a first test pipe on the pressure detection means side of the first on-off valve and branched to be connected to the primary side of the valve body. It is characterized by comprising a second test pipe and a second on-off valve provided in the middle of the second test pipe.

The present invention is also characterized in that a three-way valve is used as the switching valve. Further, in the present invention, the three-way valve has a lever, and when the lever is operated to a normally open position, pressurized water flows from the alarm pipe to the pressure detecting means, and when the lever is operated to a closed position during a test, first,
The pressurized water flows from the second test pipe to the pressure detecting means.

Further, the present invention is characterized in that a check valve is provided in the middle of the first test pipe downstream of the first opening / closing valve. Further, the present invention is characterized in that a pressure measuring means for confirming a pressure applied to the pressure detecting means is connected to the first test pipe.

[0011]

According to the transmission function testing device in the pressure detecting means of the automatic alarm valve of the present invention having the above-mentioned structure, the first opening / closing valve and the second opening / closing valve are closed and the switching valve is operated during normal monitoring of the sprinkler. When the is operated to the normally open position and the transmission function of the pressure detection means is tested, first, the second on-off valve is opened. Pressurized water passes through the second on-off valve and flows into the first test pipe, filling the switching valve.

The pressure in the first test pipe is measured by the pressure measuring means to confirm the pressure on the primary side of the valve body. However, at this time, since the switching valve is in the normally open position, the pressurized water does not flow to the pressure detecting means, and the alarm signal is not transmitted. Here, when the switching valve is operated to the closed position, the pressurized water in the first test pipe flows into the pressure detecting means via the switching valve, and the pressure detecting means emits an alarm signal.

When confirming the outgoing call again or at the end of the test,
The second on-off valve is closed, the supply of pressurized water from the primary side of the valve body is stopped, and the first on-off valve is opened to replenish the water in the pressure detection means and the water in the first test pipe via the check valve. And drain from the drainage pipe. As a result, the pressure detecting means stops transmitting the alarm signal. In this way, the transmission function of the pressure detecting means can be tested without operating the valve body of the automatic alarm valve.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 9 are views showing an embodiment of the present invention.
FIG. 1 shows a model diagram according to an embodiment of the present invention. In FIG. 1, 21 is a primary side water supply main, 22 is a secondary side water supply main, and these primary side water supply main 21 and secondary side water supply main 2
Between the two, the primary control valve 23 is connected to the primary side, and the valve body 25 of the automatic alarm valve 24 is connected to the secondary side. Pressurized water is supplied to the sprinkler head by means of a pressurized water supply device, elevated water tank, etc.
It is filled in 2 to prepare for a fire. Automatic alarm valve 2
Reference numeral 4 includes a valve body 25, a pressure switch 33, and a drain valve (parent-child valve) 26.

During normal times, the valve body 25 of the automatic alarm valve 24
A valve seat and a valve disc (valve body) provided inside are used as contacts to maintain the pressure balance between the primary side and the secondary side and close them. When the sprinkler head is actuated and water is sprinkled due to a fire, the secondary side of the valve body 25 is depressurized, the valve disc is pushed up, and running water is continued from the primary side as shown by arrow D.

At the time of restoration, by manually closing the primary control valve 23, the flow of water to the valve body 25 is stopped, and the valve disk of the valve body 25 returns to the normal state and is closed. 26
Is a drain valve (parent-child valve), and the drain valve 26 is a drain pipe 27.
Is connected to the secondary side of the valve body 25, and is also connected to the valve body 25 by the alarm pipe 28. Alarm pipe 28
Is connected to a pressure switch pressurizing port that is opened at a position where it is closed by a valve disc of a valve seat, and the other end is connected to a drainage pipe 30 of a drainage valve 26 via an auto drip 29.

Reference numeral 31 is an alarm pipe branching from the middle of the alarm pipe 28, and the alarm pipe 31 is connected to a pressure switch 33 as a pressure detecting means via a union 32. A three-way valve 34 as a switching valve is connected in the middle of the alarm pipe 31. The right side connection port of the three-way valve 34 in the figure is connected to the alarm pipe 31 on the valve body 25 side, the intermediate connection port in the figure is connected to the alarm pipe 31 on the pressure switch 33 side, and the left side connection port in the figure is the first test pipe. It is connected to one end of 35. The other end of the first test pipe 35 is connected to the drain pipe 30 of the drain valve 26.

As shown in FIGS. 2 and 3, the three-way valve 34
Has a lever 36, and when the lever 36 is operated to a vertical position where it is normally open as shown in FIG. 2, pressurized water flows from the valve body 25 to the pressure switch 33 as shown by arrow E, while As shown in FIG. 3, when the lever 36 is operated to the horizontal position which is the closed position during the test, the pressurized water flows from the first test pipe 35 to the pressure switch 33 as indicated by the arrow F.

A union 37 is connected to the first test pipe 35, and a three-way valve 38 is connected to the union 37. A pressurized water supply pipe 39 is connected to an intermediate connection port of the three-way valve 38, and an open / close valve 40 and a pressure gauge 41 as a pressure measuring means are connected to the pressurized water supply pipe 39. Pressure gauge 4
1 confirms the pressure in the first test pipe 35. That is,
The pressure gauge 41 is for confirming the pressure applied to the pressure switch 33. The bending pipe 42, the three-way valve 43, the first opening / closing valve 44, the bending pipe 45, the union 46, and the check valve 47 are connected to the first test pipe 35.

The first on-off valve 44 is normally closed during a test and opened during drainage. The check valve 47 is the drainage pipe 30.
This is to prevent backflow of water. 48 is a second test pipe connected in the middle of the first test pipe 35,
One end of the second test pipe 48 is connected to the first test pipe 35 between the first opening / closing valve 44 and the bending pipe 42 via the three-way valve 43, and the other end is connected to the primary side of the valve body 25 of the automatic alarm valve 24. It is connected.

A second opening / closing valve 49 and a union 50 are connected to the second test pipe 48. The second on-off valve 49 is normally closed, opened during the test, and closed at the end of the test. Next, FIGS. 4 to 6 are external views of the automatic alarm valve 24 according to an embodiment of the present invention. 4 is a front view of the automatic alarm valve 24, FIG. 5 is a side view of the automatic alarm valve 24, and FIG. 6 is a plan view of the automatic alarm valve 24.

4 to 6, reference numeral 21 is a primary side water supply main pipe, and a primary side control valve 23 having a handle 51 is connected to the primary side water supply main pipe 21. Primary side control valve 2
A valve main body 25 is connected to the valve 3, and the secondary side water supply main pipe 22 is connected to the valve main body 25. Arrow D indicates the flowing direction of the pressurized water.

On the primary side of the valve body 25, the pressurized water supply pipe 5 is provided.
2, a bending pipe 53, an opening / closing valve 54, and a pressure gauge 55 are connected to the pressurized water supply pipe 52, respectively.
Further, a pressurized water supply pipe 56 is connected to the secondary side of the valve body 25, and the curved pipe 57 and the on-off valve 5 are connected to the pressurized water supply pipe 56.
8 and a pressure gauge 59 are connected to each other. Reference numeral 26 denotes a drain valve having a drain pipe 30 for draining in the direction of arrow G, and also having a handle 60. The drain valve 26 is connected to the valve body 25 via a connecting portion 61.

Reference numeral 31 is an alarm pipe connected to the valve body 25, and the alarm pipe 31 is connected to the union 3 via a three-way valve 34.
2 and the pressure switch 33 are connected, and the first test pipe 35 connected to the drainage pipe 30 is connected.
The three-way valve 34 has a lever 36, and the lever 36 is operated to the closed position during the test as shown in FIG. This three-way valve 3
In the closed position of 4, the alarm pipe 31 from the valve body 25
The alarm pipe 31 on the pressure switch 33 side is not connected to the pressure switch 33, and pressurized water is supplied to the pressure switch 33 from the first test pipe 35.

A union 37, a three-way valve 38, a bending pipe 42, a three-way valve 43, a first opening / closing valve 44, a bending pipe 45, a union 46 and a check valve (not shown) are connected to the first test pipe 35. The first opening / closing valve 44 is closed during the test, as shown in FIG. A pressurized water supply pipe 39 is connected to the first test pipe 35 via a three-way valve 38, and an on-off valve 40 and a pressure gauge 41 are connected to the pressurized water supply pipe 39, respectively.

Further, the first test pipe 3 is connected via the three-way valve 43.
5, one end of the second test pipe 48 is connected, and the other end of the second test pipe 48 is connected to the primary side of the main body 25. A second opening / closing valve 49 and a union 50 are connected to the second test pipe 48, and the second opening / closing valve 49 is opened during the test, as shown in FIGS. Next, FIGS. 7 to 9 are views showing the pressure switch 37.

FIG. 7 is a front open view of the pressure switch 37, and FIG. 8 is a side view of the pressure switch 37 with the main body case omitted.
FIG. 9 is a rear view of the pressure switch 37 with the main body case omitted. 7 to 9, 101 is the pressure switch 3
7 is a main body case, and the main body case 101 is a main body lid 10.
It is opened and closed by 2. A cap 103 is provided on the top of the main body case 101, and a cap 104 is also provided on the side surface of the main body case 101.

A body 105 is provided at the bottom of the main body case 101.
Is fixed, and the alarm pipe 31 is connected to the threaded portion 106 of the body 105. The body 105 has a diaphragm chamber (not shown) inside, and a diaphragm (not shown) is mounted in the diaphragm chamber. The diaphragm is activated by the pressurized water added from the alarm pipe 31 to the passage of the screw portion 106.

Reference numeral 107 denotes an operating shaft projecting from the inner case 108. One end of the operating shaft 107 is attached to the center of the diaphragm, and the other end is screwed with a nut 110 via a washer 109. A spring (not shown) is interposed between the bottom wall of the inner case 108 and the step portion of the operating shaft 107, and the operating shaft 107 is constantly urged by the spring so as to return downward.

Reference numeral 120 denotes a link. One end of the link is in contact with the lower surface of the washer 109 of the operating shaft 107, and the lever 111 is in contact with the upper side of the other end of the link 120. Normally, the washer 109 causes the link 120 to
Since the rotation around the link fulcrum 121 is suppressed, the lever 111 cannot move either. Working axis 1
When 07 moves upward as indicated by arrow J, the washer 109 also moves upward, so that the link 120, whose rotation is suppressed by the washer 109, rotates about the link fulcrum 121 as indicated by arrow K. That is, since the lever 111 side of the link 120 is slightly displaced from the link fulcrum 121, the other side rotates downward as indicated by arrow K.

Next, the lever 111 with the contact of the link 120 released is the lever of the lever 111 included in the microswitch 114 due to the weight of the spring 122 included in the microswitch 114 and the piston inside the air damper 112. It moves downward around the fulcrum 123 as shown by the arrow M, and closes the contacts provided in the micro switch 114.

The lever 111 is connected to the piston 113 via a piston shaft 124. To move the lever 111 downward, the piston 113 in the air damper 112 is moved.
When moving downward, the external air is sucked into the air damper 112 through the air passage, so that the air is slowly and gradually. That is, the delay time can be adjusted by adjusting the amount of air entering the air damper 112.

Therefore, a delay adjusting screw 115 is provided on the upper part of the air damper 112, and when the delay time of the pressure switch 33 is erroneously set and the adjustment is necessary, the delay adjusting screw 115 is used to make the adjustment. Delay adjustment screw 115
The amount of air entering the air damper 112 is changed by using a minus driver to adjust the delay time. For example, turning the delay adjusting screw 115 to the left increases the amount of air entering and shortening the delay time, and turning it to the right decreases the amount of air entering,
Delay time becomes long.

Reference numeral 117 is a terminal block, 118 is a telephone jack, and 119 is a through hole. Next, the operation will be described.
First, the normal operation will be described. In normal times, the first on-off valve 44 and the second on-off valve 49 are closed, and the three-way valve 34, which is a switching valve, is operated by the lever 36 to the normally open position as shown in FIG.

In normal times, the valve body 25 is closed by maintaining the pressure balance between the primary side and the secondary side with the valve seat and the valve disc as contacts. Since the valve disc is not opened during normal operation of the valve body 25, the pressurized water on the primary side does not flow to the alarm pipes 28 and 31, the pressurized water does not flow to the pressure switch 33, and the alarm signal is not transmitted.

Further, since the first and second on-off valves 44 and 49 are closed, the pressurized water on the primary side is not supplied to the first and second test pipes 3.
No flow to 5, 48, pressure gauge 41 and pressure switch 3
Pressurized water does not flow to 3. Therefore, the pressure gauge 41 and the pressure switch 33 do not operate. Next, the operation during operation will be described.

In operation, the first and second on-off valves 44 and 49 are closed and the three-way valve 34 is in the normally open position, as in normal times. When a fire occurs, the sprinkler head is activated and water is sprinkled, the secondary side of the valve body 25 is depressurized,
The valve disc is pushed up and the running water from the primary side is continued. When the valve disc is opened, the pressurized water on the primary side
It flows into the alarm pipes 28 and 31, passes through the three-way valve 34, and is supplied to the pressure switch 33. In this case, since the first and second on-off valves 44 and 49 are closed, pressurized water does not flow to the first and second test pipes 35 and 48, but as described above,
Pressurized water flows from the alarm pipes 28 and 31 to the pressure switch 33, and the pressure switch 33 sends an alarm signal.

To restore the operating condition, if the primary side control valve 23 is manually closed, the water flow to the valve body 25 is stopped, the valve disk returns to the normal state, and the valve body 25 is closed.
Will be closed. The pressurized water supplied to the pressure switch 33 passes through the alarm pipes 31 and 28 and is drained to the drainage pipe 30 via the auto drip 29. Next, the pressure switch 33
Explain the call function test of

In order to perform the transmission function test, the second on-off valve 4
9 is opened, the pressurized water from the primary side of the main body 25 is
As shown by the middle arrow H, the second opening / closing valve 4 of the second test pipe 48
9, passing through the three-way valve 43, the first test pipe 35 to the on-off valve 4
Fill 0 and three-way valve 34 with pressurized water. Here, when the on-off valve 40 is opened, the pressurized water flows to the pressure gauge 41, and the pressure inside the first and second test pipes 35 and 48, that is, the pressure on the primary side of the main body 25 is measured by the pressure gauge 41. , Can be confirmed.

However, at this point, the three-way valve 34
Since it is in the normally open position, pressurized water is not supplied to the pressure switch 33, so that no alarm signal is issued. Here, as shown in FIG. 3, when the lever 36 of the three-way valve 34 is operated to the closed position, the pressurized water in the first and second test pipes 35, 48 flows into the pressure switch 33 via the three-way valve 34. Then, the pressure switch 33 sends an alarm signal. Thus, the transmission function test of the pressure switch 33 can be performed without operating the valve body 25 of the automatic alarm valve 24.

When the transmission is confirmed again or when the test is finished, the second on-off valve 49 is closed, the supply of the pressurized water from the primary side of the main body 25 is stopped, and the first on-off valve 44 is opened. The water filling inside 33 and the water filling inside the alarm pipe 31 flow as shown by an arrow I in FIG.
The filling water of the first test pipe 35 is drained from the drain pipe 30 via the check valve 47. Then, since the pressure switch 33 drains the pressurized water, the transmission of the alarm signal is stopped.

Thereafter, the first opening / closing valve 44 is closed and the three-way valve 3
By returning 4 to the normally open position, restoration is performed and the sprinkler is in a normal monitoring state. As described above, the transmission function test of the pressure switch 33 can be easily performed without operating the valve body 25 of the automatic alarm valve 24. Further, in the above-mentioned embodiment, all the operations of the respective valves for conducting the transmission test of the pressure switch 33 are manually performed, but the same test is performed even if all the valves are electrically operated valves and are controlled to be opened and closed remotely. You can

[0043]

As described above, according to the present invention, a switching valve is provided in the middle of the alarm pipe connected to the pressure detecting means, the switching valve is connected to the drain pipe of the drain valve, and The first test pipe with one on-off valve was connected, and the first test pipe was connected to the primary side of the valve body and the second test pipe with the second on-off valve was connected, so the valve body of the automatic alarm valve was activated. It is possible to perform the transmission function test of the pressure switch as the pressure detecting means without performing the above operation.

[Brief description of drawings]

FIG. 1 is a model diagram showing an embodiment of the present invention.

FIG. 2 is a view showing a normally open position of a switching valve.

FIG. 3 is a diagram showing a closed position of a switching valve.

FIG. 4 is a front view showing an embodiment of the present invention.

FIG. 5 is a side view showing an embodiment of the present invention.

FIG. 6 is a plan view showing an embodiment of the present invention.

[Figure 7] Front open view of the pressure switch

FIG. 8 is a side view in which the main body case of the pressure switch is omitted.

FIG. 9 is a rear view in which the main body case of the pressure switch is omitted.

FIG. 10 is a diagram showing a conventional example.

FIG. 11 is a diagram showing a conventional operating state.

[Explanation of symbols]

 21: Primary side water supply main 22: Secondary side water supply main 23: Primary side control valve 24: Automatic alarm valve 25: Valve body 26: Drain valve 27, 30: Drain pipe 28, 31: Alarm pipe 29: Auto drip 32: Union 33: Pressure switch (pressure detection means) 34: Three-way valve (switching valve) 35: First test pipe 36: Lever 37: Union 38: Three-way valve 39: Pressurized water supply pipe 40: Open / close valve 41: Pressure gauge ( Pressure measuring means) 42: Curved pipe 43: Three-way valve 44: Open / close valve 45: Curved pipe 46: Union 47: Check valve 48: Second test pipe 49: Second open / close valve 50: Union 51, 60: Handle 52, 56: Pressurized water supply pipe 53, 57: Curved pipe 54, 58: Open / close valve 55, 59: Pressure gauge 61: Connection part 101: Main body case 102: Main body lid 103, 104: Cap 105: Body 106: Screw part 107: Operating shaft 108: Inner case 109: Washer 110: Nut 111: Lever 112: Air damper 113: Piston 114: Micro switch 115: Delay adjusting screw 116: Inner cover 117: Terminal block 118: Telephone jack 119: Through hole 120: Link 121: Link fulcrum 122: Spring 123: Lever fulcrum 124: Piston shaft

Claims (5)

[Claims] 1. An automatic alarm valve, wherein when the secondary side is depressurized and the valve body is pushed up, water flowing from the primary side is continued, a part of which flows through the alarm pipe to drive the pressure detecting means, in the middle of the alarm pipe. And a first test pipe connected to the drain valve of the drain valve connected to the valve body of the automatic alarm valve and connected to the switch valve, and provided in the middle of the first test pipe. A first on-off valve, a second test pipe branching from the first test pipe on the pressure detecting means side of the first on-off valve and connected to the primary side of the valve body, and provided in the middle of the second test pipe A transmission function test device for pressure detection means of an automatic alarm valve, characterized by comprising a second opening / closing valve. 2. A transmission function testing device for pressure detecting means of an automatic alarm valve according to claim 1, wherein a three-way valve is used as the switching valve. 3. The three-way valve has a lever, and when the lever is operated to a normally open position, pressurized water flows from the alarm pipe to the pressure detecting means, and when the lever is operated to a closed position during a test, the three-way valve is operated. 3. The transmission function test device for pressure detecting means of an automatic alarm valve according to claim 2, wherein pressurized water flows from the second test pipe to the pressure detecting means. 4. A transmission function testing device for pressure detecting means of an automatic alarm valve according to claim 1, wherein a check valve is provided in the middle of said first test pipe downstream of said first opening / closing valve. 5. The pressure detecting means for an automatic alarm valve according to claim 1, wherein a pressure measuring means for confirming a pressure applied to the pressure detecting means is connected to the first test pipe. Transmission function test equipment.