JP2007024101A - Emergency opening valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an emergency opening valve with a valve element to be opened/closed with a simple mechanism. <P>SOLUTION: The valve element 2 of a rotary valve for opening/closing a flow path P is energized to a valve closing direction with the dead weight of a weight 10. The weight 10 is shaped into a container to the inside of which fluid W can be introduced and to the outside of which the introduced fluid W can be discharged, to achieve a variable dead weight. The introduction of the fluid W into the weight 10 increases the dead weight to turn the valve element 2 to be closed, and the discharge of the fluid W therefrom reduces the dead weight to turn the valve element 2 to be opened with fluid pressure in the flow path P. The introduction of the fluid W into the weight 10 is carried out via an introduction pipe 11 with a solenoid valve 14 which communicates the internal of the weight 10 with the internal of the flow path P on the upstream side of the rotary valve, and the discharge of the fluid W therefrom is carried out via a discharge pipe 16 with a solenoid valve 15. The introduction and discharge of the fluid W are controlled by the operation of the solenoid valves 14, 15, therefore eliminating the need for a complicated operating means such as a hydraulic cylinder or a torque generator for operating the valve element 2 to be opened/closed. Thus, the valve element can be opened/closed with the simple mechanism. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an emergency release valve that is installed in a fluid pipe such as a water supply or a sewer and discharges fluid in the pipe line in an emergency or the like.

There are cases where a branch pipe is provided at an appropriate position in a fluid pipe such as a water supply or sewer, and an emergency open valve is provided in the branch pipe. This branch pipe is connected to, for example, a disaster-preserving water tank prepared in advance, and in the event of a disaster such as a major earthquake, the emergency release valve is automatically opened to make a large amount of water in that water tank. As a result, fresh water is supplied, and water for daily use is recovered until disaster recovery.
Also, in sewers where rainwater flows, connect a branch pipe with an emergency release valve to the discharge pipe to the river. In some cases, a large amount of rainwater can be drained into the river.

As an emergency release valve provided at such a location, for example, an emergency release valve 31 shown in FIG. The configuration is such that a valve shaft 36 perpendicular to the pipe P is provided in a valve box 36 at the end of the pipe P branched from the water main pipe, and a valve body 32 is attached to the valve shaft 35 via an arm 34. The rotary valve is configured such that the valve body 32 can be brought into and out of contact with the valve seat 33. Further, a hydraulic cylinder 38 is connected to the valve shaft 35 via an arm 37, and the advance / retreat of the rod 38 a of the hydraulic cylinder 38 is controlled by the opening / closing control unit 40.
The hydraulic cylinder 38 is a double-acting cylinder, and each cylinder chamber is connected to the control set 43b and the hydraulic unit 43a of the opening / closing control unit 40 via pipes 44 and 45, respectively. Further, a seismometer 41 is connected to the control panel 42, and the control panel 42 receives a signal from the seismometer 41 and operates the hydraulic unit 43a and the control set 43b. Note that reference numeral 46 in the figure denotes power supply wiring.

  When the hydraulic unit 43a and the control set 43b are activated in the event of an earthquake, the rod 38a moves backward in the direction of arrow D in the drawing, whereby the valve body 32 rotates and opens (see the arrow shown in FIG. 5). b), the water in the pipe P is discharged (see arrows a and c in the figure). When stopping the discharge of the water, the rod 38a advances in the reverse direction, so that the valve body 32 rotates and closes.

In Patent Document 1, a weight is attached to the valve shaft of the rotary valve via an arm, and the valve body is urged in the valve opening direction by the weight of the weight, and the arm is normally locked to close the valve. A technique is also disclosed in which the state is maintained and the arm is automatically unlocked and the arm is rotated by its own weight to open the valve in an emergency.
JP-A-8-54069

However, when the emergency release valve 31 shown in FIG. 5 is employed, it is necessary to provide an operating means such as a hydraulic cylinder 38 in order to open and close the valve body 32. In addition, the emergency release valve described in Patent Document 1 requires an operation of rotating an arm with a weight in the reverse direction and returning the valve body to a closed position by an operating device. Since an apparatus becomes complicated by providing a hydraulic cylinder and an operating device, an emergency release valve having a simpler structure is desired.
Accordingly, an object of the present invention is to enable the opening and closing operation of the valve element of the emergency release valve by a simple mechanism.

  In order to solve the above-mentioned problems, the present invention has a container-like weight for urging the valve body in the valve closing direction so that the fluid in the conduit can be introduced into the container, and the introduced fluid can be discharged. It was.

  In this way, the weight of the weight is increased by introducing the fluid into the weight, and the valve body is urged in the valve closing direction by the weight of the weight to rotate and close the valve. Further, if the introduced fluid is discharged, the weight is reduced and the urging force is weakened. Therefore, the valve body is rotated and opened by the fluid pressure in the pipe. As described above, since the valve body can be opened and closed by changing the weight of the weight, complicated operation means such as a hydraulic cylinder and an operating device for opening and closing the valve body are unnecessary. Therefore, the valve element of the emergency release valve can be opened and closed by a simple mechanism.

  Since the present invention is configured as described above, the valve body of the emergency release valve can be opened and closed by a simple mechanism.

As an embodiment of the above means, the valve body of the rotary valve that opens and closes the flow path is urged in the valve closing direction by the weight of the weight, and the fluid can be introduced into the interior by making the weight into a container shape. The dead weight is made variable by enabling discharge to the outside. Due to the introduction of the fluid into the weight, the self-weight increases and the valve body rotates and closes, and when the fluid is discharged, the self-weight decreases and the valve body rotates due to the fluid pressure in the flow path. The valve is configured to move and open.
In this way, the weight of the valve body is increased and decreased by introducing and discharging the fluid into the weight, and the urging force due to the weight of the weight and the fluid pressure of the flow path are utilized, and the valve body is moved by a simple mechanism. Opening and closing operations can be performed.
It is desirable that the urging force of the valve body due to the weight of the weight when the valve is closed has a self-weight sufficient to firmly abut the valve body against the fluid pressure in the flow path.

In the above configuration, if an introduction pipe that communicates between the inside of the weight and the inside of the flow path is provided, and the fluid is introduced into the weight via the introduction pipe, the fluid is introduced into the container-like weight. When doing so, there is no need to bring in fluid from others.
However, when discharging the fluid introduced into the weight to open the valve, the amount of introduction from the introduction pipe should be relatively less than the discharge quantity, or the introduction pipe should be completely blocked. It is necessary to set the weight of the weight to be reduced.

  Further, in the above configuration, when the fluid is introduced into the weight, it is desirable that the gas in the tank is appropriately discharged to the outside along with the introduction. However, if the inside of the weight is not sealed, the valve body There is a concern that the fluid may leak to the outside as the fluid rotates. Therefore, it is preferable to provide an air valve that seals the inside of the weight and discharges the internal gas as the fluid is introduced, because the fluid does not leak and the fluid is smoothly introduced.

  Further, if the fluid is discharged through a discharge pipe provided in the weight and an electromagnetic valve is provided in the discharge pipe so that the discharge pipe can be opened and closed by the operation, the discharge of the fluid can be easily controlled. Further, since a small electric power is sufficient to operate the solenoid valve, it is easy to secure a power source.

  Further, in each of the above configurations, a configuration may be adopted in which an electromagnetic valve is provided in the introduction pipe so that the introduction pipe can be opened and closed by its operation, and the introduction pipe is closed by the solenoid valve when the fluid is discharged. . In this way, when the fluid introduced into the weight is discharged, the introduction of the fluid from the introduction pipe can be stopped, so that the weight of the weight can be reduced early to open the valve body. it can.

  If both the solenoid valves are operated together by a signal from the outside, it is convenient that the fluid is discharged and introduced automatically upon receipt of the signal. For example, the signal from the outside may be generated from a seismometer that senses the earthquake when the earthquake occurs.

  Furthermore, a configuration in which the valve opening amount of the valve body can be adjusted by increasing or decreasing the urging force of the valve body in the valve closing direction due to the weight of the weight in accordance with the fluid pressure in the flow path may be employed. By making the weight of the weight variable, its own weight, that is, the urging force acting in the valve closing direction acting on the valve body can be adjusted arbitrarily, so if the urging force is increased or decreased according to the fluid pressure in the flow path, the valve The body can be maintained at the desired valve opening. For this reason, the supply amount of the fluid can be adjusted.

  A first embodiment will be described with reference to FIGS. As shown in FIG. 1, the emergency release valve 1 of the first embodiment is provided with a valve shaft 5 in a valve box 6 at the end of a pipe (flow path) P branched from the water main, and the valve shaft 5 The oscillating valve type has a valve body 2 attached to the arm 4 via an arm 4. The valve body 2 is rotatable around the valve shaft 5 so as to be freely contacted and separated from the valve seat 3, and the valve shaft 5 is provided with a weight 10 having a hollow container shape via an arm 12. Is provided.

  The weight 10 communicates with the pipe P on the upstream side of the valve seat 3 via the introduction pipe 11 shown in FIG. 1, and the water W in the pipe P can be introduced into the weight 10. An electromagnetic valve 14 that opens and closes the introduction pipe 11 is provided in the middle of the introduction pipe 11.

Further, a float type air valve 13 for discharging the internal air A with the introduction of the water W is provided on the upper portion of the weight 10. When there is no water in the weight 10 or when the water level is low, the float (not shown) is at a relatively low position in the weight 10 and the air valve 13 is open.
When the electromagnetic valve 14 is opened, the water W in the pipe P is introduced into the weight 10 through the introduction pipe 11, and the introduction raises the water level in the weight 10 and raises the float. As the float rises, the air valve 13 is closed and water is stopped. If the electromagnetic valve 14 is closed, the introduction of the water W is stopped.

  A discharge pipe 16 is provided below the weight 10, and an electromagnetic valve 15 that opens and closes the discharge pipe 16 is provided in the middle of the discharge pipe 16. The water W introduced into the weight 10 is discharged through the discharge pipe 16.

  Both solenoid valves 14 and 15 are connected to the control panel 22 of the open / close control unit 20 via wires 24 and 25, respectively. The control panel 22 can operate both electromagnetic valves 14 and 15 in response to a signal emitted from the seismometer 21 when an earthquake occurs. A solar battery 23 is provided as a power source for each device. Yes.

  The operation of the emergency release valve 1 will be described. Since the solenoid valve 14 is opened and the solenoid valve 15 is closed in normal times, the water W in the pipe P passes through the introduction pipe 11 into the weight 10. Introduced, the weight of the weight 10 increases. The dead weight urges the valve body 2 in the valve closing direction, and the valve body 2 rotates in the valve closing direction to close the valve (see the state shown in FIG. 1). The urging force of the valve body 2 due to the weight of the weight 10 when the valve is closed closes the valve body 2 against the valve seat 3 against the fluid pressure in the pipe P (see arrow a in the figure). It is desirable that it is sufficient.

When an earthquake occurs, the control panel 22 receives a signal emitted from the seismometer 21 and closes the solenoid valve 14 and opens the solenoid valve 15 by the control.
By closing the electromagnetic valve 14, the introduction of the fluid W into the weight 10 is stopped. Further, by opening the electromagnetic valve 15, the fluid W into the weight 10 is discharged to the outside from the discharge pipe 16, and the weight of the weight 10 gradually decreases. Due to this decrease, the urging force of the weight 10 in the valve closing direction of the valve body 2 decreases. When the urging force in the valve opening direction due to the fluid pressure in the pipe line P becomes larger than the urging force in the valve closing direction, the valve body 2 rotates and opens (see arrow b shown in FIG. 2). ), Water W is discharged (see arrows a and c shown in the figure).
When the discharge of the water W is completed, the water W in the pipe P is again introduced into the weight 10 through the introduction pipe 11 by returning the solenoid valves 14 and 15 to the original state via the control panel 22. The weight of the weight 10 increases, and the valve body 2 rotates and closes.
For example, a timer may be provided in the control panel 22, and the timer may be set so that the valve is automatically closed after a predetermined time has elapsed from the start of the discharge. The control panel 22 may receive a signal transmitted from a water level detection device provided in a tank, a flow path or the like, and the electromagnetic valves 14 and 15 may be operated by the control. In addition, the electromagnetic valves 14 and 15 may be operated by receiving external signals from the command room.

In addition, in this Example 1, although the emergency release valve 1 was provided in the terminal of the pipe line P branched from the water main, in addition to this Example, the emergency release valve 1 has the pipe line P which transfers the fluid. It can be provided in the middle, or can be provided at any location of a general fluid flow path such as an outlet of a water storage tank. In addition, the configuration of the rotary valve may employ a type other than the swing valve shown in this embodiment. For example, it can be applied to a rotary valve of a butterfly valve type. When the emergency release valve 1 is a butterfly valve type rotary valve, it is desirable that the valve shaft of the rotary valve be provided eccentric from a line passing through the axis of the pipe P.
Further, as a mode of the air valve 13 provided in the weight 10, a known air valve can be adopted in addition to the float type air valve shown in this embodiment.

  Furthermore, when the fluid W introduced into the weight 10 is introduced into the weight 10 by a predetermined amount, the weight of the weight 10 increases and the valve body 2 is closed against the fluid pressure. It must be possible to have a specific gravity above a certain level. Therefore, when the fluid W supplied to the flow path P is less than the specific gravity, the introduction of the fluid W into the weight 10 is not performed through the introduction pipe 11 but from the other. Means to do this can also be employed.

Further, for example, the opening and closing of both solenoid valves 14 and 15 are controlled manually or by a device such as the control panel 22 and the amount of the fluid W intervening in the weight 10 is increased or decreased, whereby the weight of the weight 10 is set to an arbitrary weight. Can be adjusted. If the weight of the weight 10 can be adjusted to an arbitrary weight, the opening amount of the valve body 2 can be adjusted by adjusting the weight of the weight 10 in accordance with the fluid pressure in the pipe P. Therefore, the supply amount of the fluid W is adjusted. Is possible.
In particular, when the fluid pressure in the pipe P changes with time, a means for detecting the change in the fluid pressure is provided, and the weight of the weight 10, that is, the urging force in the valve closing direction is set to the detected fluid pressure. It is effective to automatically adjust in accordance with this, and to provide means capable of always maintaining the valve body 2 at a predetermined valve opening amount by the adjustment.

A second embodiment will be described with reference to FIGS. In the second embodiment, the weight 10 shown in the first embodiment is directly attached to the valve body 2.
FIG. 3 shows a state where the fluid W is introduced into the weight 10 and the weight of the weight 10 increases, whereby the valve body 2 is rotated and closed. Since the weight 10 is attached to the back surface of the valve body 2, the structure of the apparatus is simple. FIG. 4 shows a state where the electromagnetic valve 14 is closed and the electromagnetic valve 15 is opened, and the water W in the weight 10 is discharged. The valve body 2 is rotated and opened when the biasing force in the valve opening direction due to the fluid pressure in the pipe line P becomes larger than the biasing force in the valve closing direction by the weight 10.

In the front view of Example 1, a valve closing state is shown. 1 shows the opened state of FIG. In the front view of Example 2, a valve closing state is shown. FIG. 3 shows the opened state of FIG. Front view showing a conventional example

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,31 Emergency release valve 2,32 Valve body 3,33 Valve seat 4,12,34,37 Arm 5,35 Valve shaft 6,36 Valve box 10 Weight 11 Introduction pipe 13 Air valve 14, 15 Solenoid valve 16 Exhaust pipe 20, 40 Opening / closing controller 21, 41 Seismometer 22, 42 Control panel 23 Solar cell 24, 25 Wiring 38 Hydraulic cylinder 38a Rod 43a Hydraulic unit 43b Control set 44, 45 Piping 46 Power supply wiring

Claims (8)

  The valve body 2 of the rotary valve that opens and closes the flow path P is urged in the valve closing direction by the weight of the weight 10, and the fluid W can be introduced into the interior by making the weight 10 into a container shape. The dead weight is made variable by allowing the fluid W to be discharged, the dead weight is increased by introducing the fluid W, the valve body 2 is rotated and closed, and the dead weight is reduced by discharging the fluid W. An emergency release valve in which the valve body 2 is rotated and opened by the fluid pressure in the flow path P.   2. The emergency according to claim 1, wherein an introduction pipe 11 that communicates the inside of the weight 10 and the inside of the flow path P is provided, and the fluid W is introduced into the weight 10 through the introduction pipe 11. Open valve.   The inside of the weight (10) is hermetically sealed, and the weight (10) is provided with an air valve (13) that discharges the internal gas (A) with the introduction of the fluid (W). Emergency release valve.   The fluid W is discharged through a discharge pipe 16 provided in the weight 10, and an electromagnetic valve 15 is provided in the discharge pipe 16 so that the discharge pipe 16 can be opened and closed by its operation. The emergency release valve according to any one of 3 above.   An electromagnetic valve 14 is provided in the introduction pipe 11 so that the introduction pipe 11 can be opened and closed by its operation, and when the fluid W is discharged, the introduction pipe 11 is closed by the solenoid valve 14. The emergency release valve according to any one of 1 to 4.   The emergency release valve according to claim 4 or 5, wherein both the electromagnetic valves (14, 15) are operated together by an external signal.   7. The emergency release valve according to claim 6, wherein the external signal is emitted from a seismometer.   A valve opening amount of the valve body 2 can be adjusted by increasing or decreasing an urging force in the valve closing direction of the valve body 2 due to the weight of the weight 10 in accordance with the fluid pressure in the flow path P. The emergency release valve according to any one of claims 1 to 6.

Images