JPH0731289Y2 - Abnormality diagnosis type pressure regulator - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial field of application) The present invention relates to an abnormality diagnosis type pressure regulator, and in particular, is made to be able to judge and process an abnormality in the LP gas supply equipment. Regarding pressure regulators.

(Prior Art) In order to supply LPG to a domestic gas appliance, it is necessary to connect a pressure regulator between the LP gas cylinder and a domestic pipe to reduce the supply gas pressure.

And, in the past, the gas supplier checked the safety characteristics of this regulator with a rate of once every two years.
This abnormality of the pressure reducing valve directly leads to accidents such as gas leaks and gas explosions, and the conventional inspection frequency is not sufficient to prevent such accidents. Need to raise.

For this reason, in recent years, a self-contained meter with a microcomputer that takes out flow rate change and integrated flow rate as a signal has come to be attached to an LPG supply facility. Also, LPG distributors and LPG
Centers and terminals are placed at the consumers respectively, and a telephone line connects them to each other, and the terminals send gas meter reading data to the center through this telephone line based on the request from the center and warn of gas leaks at any time. Systems have been developed that allow information to be reported.

(Problems to be solved by the invention) However, even if the safety characteristics are checked regularly, it is difficult to distinguish between normal and abnormal unless a clear phenomenon occurs. There was a fear that I could not take sufficient measures. Further, it is difficult to solve this problem even with a microcomputer-equipped meter, and in particular, it is difficult to determine whether the blockage pressure and the supply pressure change in the pipe downstream from the regulator are normal or abnormal. Furthermore, it has been difficult to cope with minute leaks in the gas supply facility and large discharge due to breakage of piping and equipment.

The present invention has been made in view of the above points, and constantly monitors changes in pressure in piping to prevent a large flow rate downstream of the regulator from leaking and piping, thereby making it possible to rationalize security work. An object is to provide a diagnostic type pressure regulator.

[Constitution of device]

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a nozzle as a flow port for pressure fluid and a valve body for opening and closing the pressure fluid outlet side of the nozzle in a housing. A pressure regulator is constructed by connecting an operating rod for driving the body to a pressure regulating diaphragm, and a pressure gauge provided on the upper side of the housing so as to face the pressure regulator, a pressure fluctuation detecting diaphragm, A conversion mechanism for converting the vertical movement of the pressure fluctuation detecting diaphragm into a rotational displacement and a pointer interlocked with the rotational displacement via the conversion mechanism are provided.
In an abnormality diagnosis type pressure regulator in which the internal pressure is displayed by looking the pointer outward through a display window, a pair of reed switches disposed on the pressure gauge side so as to face the swivel end of the pointer. A position needle is attached to the pointer shaft for position adjustment to display the minimum gas pressure, and it is designed to externally display and / or notify that the internal pressure has exceeded the set value. A shut-off means for shutting off the nozzle and a return means for forcibly opening the shut-off nozzle are provided on the pressure regulator side to prevent a large amount of the pressure fluid from being discharged when an abnormal pressure occurs. It is characterized by having done.

(Operation) According to the above configuration, the internal pressure can be visually confirmed from the outside through the display window with the pointer, and at the same time, when the internal pressure exceeds the set value, a signal is output by the notifying means including the pointer and the reed switch. , And / or information is displayed to the outside. Furthermore, when an abnormality occurs, the shutoff means is activated to shut off the flow port, so that a large flow rate discharge of the pressure fluid can be prevented. Further, the blocked flow port can be opened by the valve opening means to restore the original state.

(Embodiment) An embodiment of the present invention will be described below in detail with reference to the drawings.

1 to 4 show an embodiment of an abnormality diagnosis type pressure regulator according to the present invention.

In the figure, reference numeral 1 is an automatic switching device in which a switching knob 3 is protruded from an upper portion of a housing 2, and the switching device 1 has a pair of gas inlet ports (not shown), and each of these ports is used on a use side and a spare side. It is connected to an LP gas cylinder.

Reference numeral 4 denotes a pressure regulator communicating with the gas outlet end of the switching device 1 via a nozzle 5. The regulator 4 has an opening / closing valve body 6 of the nozzle 5 and one end linked to the opening / closing valve body 6, An operating rod 8 whose end is connected to a pressure adjusting diaphragm 7 provided on the lower side of the housing 1 is provided, and the valve body 6 is brought into and out of contact with the nozzle 5 according to expansion and contraction of the diaphragm 7, thereby reducing the gas pressure. I am trying to adjust to the state.

The other end of the regulator 4 is used as a gas outlet port 9 and flows to the gas terminal side through a pipe (not shown) connected to the gas outlet port 9 whose pressure has been adjusted. On the gas outlet port 9 side, a cam 10 that is rotated by a handle 11 provided on the outer side of the housing 2 and the cam 10 are provided.
There is provided a manual closing mechanism including a pressing element 12 for pressing the back surface of the opening / closing valve element 6 to forcibly close the nozzle 5.

A pressure gauge 14 is provided on the upper side of the housing 2 so as to face the pressure regulator 4.

The pressure gauge 14 includes a pressure detection diaphragm 15, a detection rod 17 having a lower end coupled to the center of the diaphragm 15 and an upper end protruding into the pressure gauge chamber 16, and a direction perpendicular to the axial direction of the detection rod 17. A pointer shaft that is rotatably supported in the housing of the pressure gauge 14
18, and the base of the pointer 19 is connected to this pointer shaft 18,
This base is formed in an L shape, and its tip is swingably connected to the upper end of the detection rod 17. The vertical movement of the detection rod 17 is converted into the rotational movement of the pointer 19, and the turning end of the pointer 19 is displayed through the display window 21 provided on the top surface of the cover 20.

Furthermore, a pointer needle 22 for displaying the minimum gas pressure is provided on the pointer shaft 18, and its position is adjusted by a knob 23. A printed circuit board 24 is fixedly arranged in the pressure gauge 14 in a direction perpendicular to the pointer shaft 18, and a pair of reed switches 25 for detecting abnormal pressure are fixedly arranged on the printed circuit board 24. It is located opposite to the turning end of the pointer 19.

The lead wire 25a of each reed switch 25 is bundled into one signal wire in a bundled state, led out to the outside from the side of the pressure gauge 14 through the grommet 26, and connected to a communication controller (not shown) or the like. There is.

Further, a magnet 27 for detection is fixed to the lower part of the turning end of the pointer 19 so as to face each reed switch 25.
The reed switch 25 is turned on by the approach of and the signal is output.

On the other hand, a ball 28 as a blocking means is movably provided on the inflow side of the nozzle 5, and contacts the valve seat 5a formed on the inflow side inner peripheral portion of the nozzle 5 to close the nozzle 5. It has become. Further, a valve spring 29 for separating the ball 28 from the valve seat 5a when the fluid pressure in the nozzle 5 is normal, and a return valve 30 as a returning means for forcibly separating the ball 28 from the valve seat 5a are provided. , Each of which is provided concentrically in the nozzle 5, and the base end of the return valve 30 is the valve body 6
It is fixed to.

Next, the operation of this embodiment configured as described above will be described.

Abnormal occlusion pressure is detected by the diaphragm 15 in the pressure sensitive chamber A.
Detects the magnitude of the pressure and is displaced, and the pointer 19 rotates through the detection rod 17 to display normal and abnormal pressure on the display window 21. At this time, the magnet attached to the pointer 19
When 27 approaches the reed switch 25 set in the abnormal area in advance, the reed switch 25 is turned on and a signal is emitted.

Further, in the supply pressure abnormality detection, the reed switch 25, which is set in the upper limit region and the lower limit region in advance, is turned on as in the above case, and a signal is issued. At this time, regarding the abnormality of the lower limit pressure, the placement needle 22 rotates following the pointer 19, so that the lower limit value during the monitoring period can be left as evidence on the site. Further, after confirming the presence or absence of abnormality of the placement needle 22, the cover 20 can be removed and the knob 23 can be rotated to return to the original position. Alternatively, a magnet holder with a magnet attached may be used to return from the outside with the cover 20 attached.

In addition, when a large flow rate is released due to breakage of pipes or equipment, the gas passing through the nozzle 5 is changed to the valve spring.
The ball 28 is pushed against the urging force of 29, brought into contact with the valve seat 5a, and the nozzle 5 is closed to block outflow of gas. If the gas flow rate is below the specified value and normal, the valve spring 29
The ball 28 is separated from the valve seat 5a by the
Is open. Also, once the valve is closed, the gas pressure causes a valve seat.
In order to disengage the ball 28 that is still in contact with the valve 5a from the valve seat 5a, the lever 11 is rotated about 90 degrees after confirming the closed state on the downstream side, and the cam 10 pushes the pusher 12 and the valve disc. By pushing the return rod 30 via 6, it is sufficient to provide a slight gap between the ball 28 and the valve seat 5a.
The urging force of 29 causes the ball 28 to separate from the valve seat 5a and return to the original position.

Gas leakage in the pipeline is detected by checking the position of the pointer 19 displayed on the display window 21 as in the case described above, and when an abnormality is detected, the pipe is closed by a manual or automatic closing mechanism. Block the road.

According to this embodiment, an abnormality in the closing pressure and the supply pressure can be detected by the position of the pointer 19 displayed on the display window 21, and the abnormality can be notified to the site and a remote place by the detection signal emitted from the reed switch 25. . At the same time, it is possible to detect a leak in the pipe, and prevent a large flow rate from being discharged due to breakage of the pipe or equipment.

In the above embodiment, the abnormality diagnosis type pressure regulator provided in the LP gas supply facility has been described, but the same effect can be obtained even when applied to the city gas supply facility.

[Effect of device]

As described above in detail, in the abnormality diagnosis type pressure regulator according to the present invention, the obstruction pressure and the abnormality of the supply pressure in the gas supply equipment can be constantly monitored, and the maintenance can be enhanced. . In addition, it is possible to prevent discharge of a large flow rate and prevent occurrence of an accident.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the abnormality diagnosis type pressure regulator according to the present invention, FIG. 2 is a plan view of an essential part of FIG. 1, and FIG.
FIG. 4 is a side sectional view of FIG. 2, and FIG. 4 is an enlarged sectional view showing a main part of the pressure regulator shown in FIG. 1 ... Automatic switching device, 2 ... Housing, 4 ... Pressure regulator, 5 ... Nozzle (flow port), 6 ... Valve element, 7 ... Pressure adjusting diaphragm, 8 ... Operating rod, 15 ... ... Pressure detection diaphragm, 19 ... Indicator, 21 ... Display window, 22 ... Set needle, 25 ... Reed switch (informing means), 28 ... Ball (breaking means), 30 ... Return valve (open valve) means).

Claims (1)

[Scope of utility model registration request] 1. A nozzle as a flow port for pressure fluid and a valve body for opening and closing the pressure fluid outlet side of the nozzle are provided in a housing, and an operating rod for driving the valve body is connected to a pressure adjusting diaphragm. While configuring the pressure regulator,
A pressure gauge provided on the upper side of the housing facing the pressure regulator, a diaphragm for pressure fluctuation detection, a conversion mechanism for converting vertical movement of the diaphragm for pressure fluctuation detection into a rotational displacement, and this conversion mechanism. An abnormal diagnosis type pressure regulator in which a pointer interlocking with the rotational displacement is provided through the display window to display the internal pressure, and the pointer is provided on the pressure gauge side. A pair of reed switches that are arranged opposite to the swivel end and a stand needle that is mounted on the pointer shaft so as to be positionally adjustable and displays the minimum gas pressure are provided to the outside to indicate that the internal pressure has exceeded the set value. And / or a shutoff means for shutting off the nozzle when an abnormal pressure occurs, and a restoring means for forcibly opening the shutoff nozzle.
An abnormality diagnosis type pressure regulator, which is provided on the pressure regulator side to prevent a large amount of the pressure fluid from being discharged when an abnormal pressure occurs.