JPH08152920A - Monitor-worker integrated type pressure govenor - Google Patents

Abstract

PURPOSE: To provide a monitor-worker integrated type pressure govenor in which the structure is made compact and simple, maintenance managing ability is improved and the cost is reduced. CONSTITUTION: The monitor-worker integrated type pressure govenor 20 is interposed between a primary side duct 21 and a secondary side duct 22. Both a govenor 23 for worker and a govenor 24 for monitor are unloading type pressure govenors, formed integrally with a casing 25 and serially connected by a flow passage 26. Ordinarily, the govenor 23 for worker governs pressure and the govenor 24 for monitor is turned to an opened state. When the govenor 23 for worker breaks down and turns to the opened state, the govenor 24 for monitor starts governing pressure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure regulator, also called a governor, which is interposed in a city gas supply system and reduces primary pressure from an upstream side to a predetermined secondary pressure, and particularly two pressure regulators are connected in series. To a monitor worker integrated pressure regulator.

[0002]

2. Description of the Related Art Conventionally, a city gas supply system has been constructed as shown in FIG.
A gas pressure regulation system as shown in Fig. 3 is used to ensure safety and increase the reliability of supply. In the two-series and two-way shutoff system of FIG. 6 (1), the emergency shutoff valves 3a and 3b and the governor 4 are provided between the upstream-side primary pipeline 1 and the downstream-side secondary pipeline 2.
a, 4b and valves 5a, 5b are connected in series, respectively. Normally, one series a operates and the other series b is closed. If an abnormality occurs in the operation of the governor 4a of one of the series and the secondary pressure rises, the emergency shutoff valve 3 of that series
a is closed, and the other series b becomes active. Figure 6
In the two-series one-shutoff system of (2), normally, the governor 4a of the series provided with the emergency shutoff valve 3a operates, and when an abnormality occurs and the secondary pressure rises, the emergency shutoff valve 3a closes and the secondary pressure When G.sub.2 falls, the governor 4b of the other series comes to operate. In the one-series monitor worker system of FIG. 6C, the secondary pressure set value of the monitor governor 7 is set to be slightly larger than the secondary pressure set value of the worker governor 6. Normally, the worker governor 6 operates and the monitor governor 7 is open. If the secondary pressure rises due to an abnormality in the worker governor 6,
The monitor governor 7 operates.

FIG. 7 shows a configuration of a F399 type manufactured by Fischer, which is a typical unloading type pressure regulator 9 which is often used for the governors 4a and 4b of FIG. A boot 12 which is a rubber valve body is provided in the space sealed by the casing 10 and the cover 11, and is pressed against the surface of the cage 13 that partitions the primary pipe line 1 and the secondary pipe line 2. Close. The boot 12 is pressed by the pressure on the back side of the boot 12 and the elastic force of the boot 12 itself. When the boot 12 opens, the retainer 1
3 prevents excessive deformation and improves overall characteristics. The pressure on the back surface side of the boot 12 is an intermediate pressure in the pilot line in which the restrictor 15 which is a throttle and the pilot valve 16 are provided. Note that the secondary pressure portion is shown with a grid-like display. Such an unloading type pressure regulator 9 has a relatively simple structure, high reliability, is compact, and is space-saving.

[0004]

As a gas pressure regulating system which enhances security and reliability of supply, the 1-series monitor worker system shown in FIG. 6 (3) requires the smallest installation space, but it requires a governor. It is necessary to arrange two in series. To further reduce the installation space,
A configuration in which two governors are integrated as shown in (3) is also used. That is, in the monitor worker integrated pressure regulator 18,
The unloading type pressure regulator 9 and the loading type pressure regulator 19 are housed in one body, and the face-to-face distance for connecting to the primary side and the secondary side, the connection type, the diameter, etc. are all the same as the single governor. Has been If either the worker or the monitor is the unloading type and the other is the loading type, the integration is easy. However, the loading type pressure regulator 19 has a complicated structure, is large in size, has poor maintainability, and is expensive.

An object of the present invention is to provide a monitor-worker-integrated pressure regulator which is compact and simple in structure, excellent in maintainability, and low in cost.

[0006]

SUMMARY OF THE INVENTION The present invention is directed to a worker pressure regulator, which is interposed in a city gas supply system and is set to a predetermined secondary pressure, and a secondary pressure higher than the secondary pressure of the worker pressure regulator. In the pressure regulator for monitor with which is set, in the monitor worker integrated pressure regulator integrally formed in a state of being connected in series,
The worker pressure regulator and the monitor pressure regulator are both configured as unloading type pressure regulators, and the worker pressure regulator and the monitor pressure regulator are connected by a flow path in a direction different from the city gas supply direction. It is a monitor worker integrated pressure regulator.

[0007]

According to the present invention, the city gas supply system is used for a worker pressure regulator which is set to a predetermined secondary pressure, and for a monitor which is set a secondary pressure higher than the secondary pressure of the worker pressure regulator. A monitor worker integrated pressure regulator, which is integrally formed with the pressure regulator in a state of being connected in series, is interposed. The worker pressure regulator and the monitor pressure regulator are both configured as unloading type pressure regulators. The work pressure regulator and the monitor pressure regulator are connected by a flow path in a direction different from the city gas supply direction. Since the direction of the flow path connecting the worker pressure regulator and the monitor pressure regulator is different from the city gas supply direction from the primary side to the secondary side, unloading type pressure regulators should be combined and integrated compactly. You can As a result, even in a small installation space, security can be ensured and reliability of supply can be improved.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a schematic construction of a pressure equalizer 20 with an integrated monitor worker according to an embodiment of the present invention. The monitor worker integrated pressure regulator 20 is a primary conduit 2 of the city gas supply system.
1 interposed between the secondary pipe line 22 and the worker governor 2
3 and the monitor governor 24 are mounted in the same casing 25. A flow path 26 is formed between the outlet side of the monitor governor 24 and the inlet side of the worker governor 23. The monitor governor 24 and the worker governor 23 are sealed by a worker cover 28 and a monitor cover 29. Although not described, a pilot pipe line is also provided separately.

The monitor governor 24 is a worker governor 2.
It is provided on the upstream side of 3. Regarding the set pressure on the secondary side, the worker governor 23 has a predetermined pressure, and the monitor governor 24 has a pressure slightly higher than the predetermined pressure. The predetermined pressure is, for example, about 200 mmAq. With such a setting, the worker governor 23 normally performs a pressure regulating operation, and the pressure of the city gas supplied to the secondary conduit 22 can be kept at a predetermined pressure. Since the set pressure of the monitor governor 24 is higher than the predetermined pressure to be kept, the monitor governor 24 is opened. If some abnormality occurs in the worker governor 23 and the worker governor 23 is opened, the pressure in the secondary conduit 22 increases and approaches the set pressure of the monitor governor 24.
Therefore, the monitoring governor 24 starts the pressure regulating operation, and the city gas can be supplied at a pressure slightly higher than the predetermined pressure.

In the governor 23 for worker and the governor 24 for monitor, boots 31, 41 which are bowl-shaped rubber film valves,
Mortar-shaped cages 32, 42 with multiple slits,
Retainer 3 that suppresses excessive deformation of boots 31 and 41
3, 43, pressure adjusting springs 34, 44 for adjusting the actions of the retainers 33, 43, and indicators 35, 45 for visually observing the degree of deformation (governor opening) of the boots 31, 41 from the outside are incorporated, F3 made by Fisher
It is configured as a 99 type unloading type pressure regulator.

2, 3 and 4 show the distribution state of city gas in the monitor-worker integrated pressure regulator 20 according to the embodiment of FIG. 1 with grid-like displays. As shown in FIG. 2, boot 41 of the monitoring governor 24 from the primary conduit 21.
Up to the monitor entrance side, and a pressure of several kgf / cm ² or more is applied. As shown in FIG. 3, the boot 41 of the monitor governor 24 to the boot 31 of the worker governor 23 are the monitor output side and the worker entry side. As shown in FIG. 4, from the boot 31 of the worker governor 23 to the secondary pipeline 2
Up to 2 is the worker exit side. In such a monitor worker pressure regulating system, normally, the monitor governor 24 is in an open state and the worker governor 23 regulates pressure. Therefore, the monitor inlet side, the monitor outlet side and the worker inlet side are pressure-controlled. Are almost equal. When the worker governor 23 fails and is opened, the monitor governor 24 immediately starts pressure regulating operation, so that the pressure on the monitor inlet side is different from the pressure on the monitor outlet side and the worker inlet side.

FIG. 5 shows a city gas flow path in a pressure regulator integrated with a monitor worker according to each embodiment of the present invention. Fig. 5 (1)
Basically, as in the embodiment of FIG. 1, it shows a straight case in which city gas is supplied from the upstream primary conduit 21 to the downstream secondary conduit 22 in substantially the same direction. Intermediate channel 2
6 is a direction different from the primary conduit 21 and the secondary conduit 22, that is, a direction close to the circumferential direction with the supply direction as an axis here. FIG. 5 (2) shows a case where the primary conduit 21 and the secondary conduit 22 are at an angle substantially orthogonal to each other. Also, FIG.
(3) shows the case of the return in which the primary conduit 21 and the secondary conduit 22 are in substantially opposite directions. Also in these cases, the intermediate flow path 26 is in a direction different from that of the primary conduit 21 and the secondary conduit 22. By changing the shape of the flow path 26,
The direction in which the parts that make up the governor are extracted is
You can freely change the settings such as before and after.

By forming such a flow path 26, it is possible to use both of the unloading type pressure regulators having a compact and simple structure rubber membrane valve, and there are the following advantages.

1. The pressure regulator and the pressure regulator system are very compact and simple.

2. Disassembly and maintenance of the pressure regulator becomes very easy. For example, while the number of disassembled parts of the conventional type as shown in FIG. 8 reaches 150, it becomes about 40.

This takes 100 minutes for two persons, while 40 minutes for one person. Compared to a monitor worker system that does not use an integrated type that uses three or two units, it only requires one body for the pressure regulator, so the cost can be reduced by about 80%.

[0017]

As described above, according to the present invention, two pressure regulators are interposed in series in the city gas supply system. One of the two pressure regulators operates as a worker pressure regulator which is set to a predetermined secondary pressure. The other operates as a monitor pressure regulator in which a secondary pressure higher than the secondary pressure of the worker pressure regulator is set. When connected in series, it operates as a monitor worker integrated pressure regulator that is integrally formed.

The pressure regulator for the worker and the pressure regulator for the monitor are
Since both are configured as unloading type pressure regulators, the structure is simple, the number of parts is small, and disassembly and maintenance are very easy. The work pressure regulator and the monitor pressure regulator are connected by a flow path in a direction different from the city gas supply direction. Since the direction of the flow path connecting the worker pressure regulator and the monitor pressure regulator is different from the city gas supply direction from the primary side to the secondary side, unloading type pressure regulators should be combined and integrated compactly. You can As a result, even in a small space, security can be secured and reliability of supply can be improved, and manufacturing cost can be reduced.

[Brief description of drawings]

FIG. 1 is a front sectional view and a piping system diagram showing a configuration of a monitor worker integrated pressure regulator according to an embodiment of the present invention.

FIG. 2 is a front cross-sectional view showing the monitor entrance side of the monitor worker integrated pressure regulator according to the embodiment of FIG.

FIG. 3 is a front sectional view showing a monitor outlet side and a worker inlet side of the monitor worker integrated pressure regulator according to the embodiment of FIG.

FIG. 4 is a front sectional view showing the worker output side of the monitor worker integrated pressure regulator according to the embodiment of FIG.

FIG. 5 is a simplified perspective view showing a shape of a flow channel according to an exemplary embodiment of the present invention.

FIG. 6 is a partial systematic diagram of a conventional gas pressure regulating system.

FIG. 7 is a front sectional view showing a configuration of a conventional unloading type pressure regulator.

FIG. 8 is a front view showing a configuration of a conventional monitor worker integrated pressure regulator.

[Explanation of symbols]

 20 Monitor Worker Integrated Pressure Regulator 21 Primary Pipe 22 Secondary Pipe 23 Worker Governor 24 Monitor Governor 26 Flow Channel 31,41 Boot 32,42 Cage

Claims (1)

[Claims] 1. A pressure regulator for a worker, which is interposed in a city gas supply system and is set to a predetermined secondary pressure, and a pressure regulator for monitoring, which is set to a secondary pressure higher than the secondary pressure of the pressure regulator for the worker. In the monitor-worker integrated pressure regulator, which is integrally formed with and connected in series, the worker pressure regulator and the monitor pressure regulator are both configured as an unloading type pressure regulator, and the worker pressure regulator and the monitor pressure regulator are combined. A pressure worker integrated with a monitor worker, which is connected to the pressure regulator for use by a flow passage in a direction different from the city gas supply direction.