JP2660082B2 - Governor equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to a governor device installed mainly in the middle of a gas pipe buried underground to adjust gas pressure.

(Prior Art) When supplying gas to general consumers, it is necessary to reduce the medium pressure gas from the gas supply source to a low pressure, or to reduce the high pressure gas to a medium pressure or to a low pressure.

Therefore, a governor device for adjusting a gas pressure is installed in a gas pipe connecting a gas supply source and a gas consumer. This governor device is generally configured as shown in FIG. That is, reference numeral 1 denotes a gas pipe connecting the gas supply source 2 and the gas demand side 3, and an inflow valve 4 is provided in the middle of the gas pipe 1. It is connected to a shutoff valve 6. Further, the emergency shutoff valve 6 is connected to a governor main body 7, and the governor main body 7 is connected to the gas demand side 3 via an outflow side valve 8. That is, the filter 5, the emergency shutoff valve 6, and the governor body 7 are flange-connected via the gas pipe 1 between the inflow side valve 4 and the outflow side valve 8.

According to the governor device configured as described above, when the gas supplied from the gas supply source 2 passes through the filter 5, foreign substances and the like contained in the gas are captured by the filter 5, and the gas pressure is controlled by the governor. The medium pressure gas is reduced to a low pressure or the high pressure gas to a medium pressure or reduced to a low pressure by the main body 7 and supplied to the gas demand side 3. Further, when the outflow side of the governor body 7, that is, when the secondary pressure rises abnormally, the emergency shutoff valve 6 operates to cut off the gas flow, thereby ensuring safety.

However, in the governor device configured as described above, the flange provided on each device and the flange provided on the gas pipe are connected by bolts and nuts. It is getting larger. Therefore, in general, a dedicated hut is set up on the ground, and the components constituting the governor device are stored inside the hut.However, since the governor device is large, the area occupied by the ground is also small. It is widely needed, and the location of the governor device has become a problem with the recent rise in land prices.

In order to solve the above-mentioned problems,
An "adjustment device for gas pressure control" disclosed in JP-A-63-11552 has been developed. The purpose of this device is to reduce the size of the device, to be buried underground, etc., and to facilitate maintenance, inspection and repair of the device, and to separate housings having removable covers from each other. It comprises one housing part, namely a first housing and a second housing. The housing is provided with a gas inlet pipe connected to the inlet valve and a gas outlet pipe connected to the outlet valve, and all of the main adjustment member as the governor body and the control member as the pilot governor are provided inside the housing. Is housed.

Therefore, in this device, each device necessary for adjusting the gas pressure is stored in one housing, and the device is small and can be buried underground or the like. Further, when a defect occurs in each of the devices, the cover and the first housing are detached so that the devices can be removed from the housing and repaired and replaced.

(Problems to be Solved by the Invention) However, the adjusting device for gas pressure control disclosed in Japanese Patent Publication No. 11552/1988 is a type in which high-pressure gas is directly introduced into the housing, and the housing is connected to a pressure-resistant container. Need to be formed. For this reason, it is necessary to set the material and thickness of the housing, and then perform inspection using X-rays or the like. Further, the housing including the cover is not a watertight structure, and a gas inflow pipe and a gas outflow pipe are protruded from a side wall of the housing, and are configured to be flange-coupled to an inflow valve and an outflow valve provided outside the housing. Therefore, as shown in FIG. 6, three manholes constructed with concrete walls or the like are required for burying underground. That is, a first manhole b for housing a housing accommodating each device, and a second manhole c and a third manhole d are formed on both sides of the first manhole b. The inflow-side valve e is housed in the second manhole c, the outflow-side valve f is housed in the third manhole d, and the gas inflow pipe g of the housing a is flange-coupled to the inflow side valve e. Must be flange-connected to the outlet valve f. Further, the housing a
Is not a watertight structure, so that the first manhole b has a double lid structure provided with an outer lid m and an inner lid n so that rainwater or the like does not enter the manhole b, and in particular, the inner lid n is sealed by a packing o. It has become. Further, detachable lids p, p are provided in the second and third manholes c, d so that rainwater or the like does not enter.

However, manholes for accommodating this type of gas control equipment are generally installed on sidewalks. However, in overcrowded cities such as Japan, the width of sidewalks is narrow, and other underground objects (waterworks) are underground. Pipes, power lines and communication cables, etc.)
In order to avoid interference with these buried objects, it is also difficult to select an installation location, especially when installing three manholes adjacent to each other. Furthermore, it is necessary to open the lids of the three manholes at the time of maintenance and inspection, and to close the lids watertight again when the operation is completed.

In addition, instead of constructing three manholes, the seventh
As shown in the figure, there is also an installation method in which one pit q is constructed by a concrete wall and the housing a, the inflow-side valve e, and the outflow-side valve f are housed together. The construction cost increases and the construction period is long. To construct the construction on a narrow sidewalk, the pedestrian is inconvenienced by closing the sidewalk for a certain period of time. Also, in the case of the pit q, it is necessary to adopt a double lid structure provided with a detachable outer lid r and an inner lid s so as to prevent rainwater or the like from entering, so that maintenance and inspection are troublesome.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a governor device which can be installed even in a place where an installation space is narrow, is easy to construct, and is easy to maintain. is there.

[Configuration of the invention]

(Means and Actions for Solving the Problems) In order to achieve the above object, the present invention provides, in a watertight structure case, an inflow valve connected to an inflow side of a gas pipe, and an outflow side of a gas pipe. And a governor unit that is connected to the outflow side valve and the both valves by piping and adjusts the pressure of the inflowing gas to flow out the outflow.

The high-pressure gas that has flowed into the governor unit from the gas supply source through the inflow-side valve is reduced to a medium pressure or a low pressure by the governor unit, and is supplied to the gas demand side through the outflow-side valve.

At the time of maintenance, the governor units can be individually removed from the case by removing the lid. Also, by filling the inside of the case with a filler together with the foam and burying the inflow-side valve, the outflow-side valve, the governor unit, and the communication pipe, the filler can be dropped even if a tool or part is dropped during maintenance and inspection. It can be received on the upper surface of the.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows the entire governor device. Reference numeral 11 denotes a rectangular parallelepiped case made of steel, and an opening 12 is provided at the top. The opening 12 is closed by a removable steel lid 13. The upper edge of the case 11 is formed at an acute angle portion 11a, and a packing 14 is mounted on the lower surface of the lid 13 to seal by tight contact with the acute angle portion 11a, and the inside of the case 11 is configured to be watertight. . Further, a corrosion-resistant film 15 made of a plastic lining is applied to the bottom surface and the outer peripheral surface of the case 11.

A governor unit 16 is installed at a substantially central portion inside the case 11 configured as described above, and an inflow-side valve 17 is installed on one side and an outflow-side valve 18 is installed on the other side.

First, the governor unit 16 will be described. This is a known AFV regulator, and is composed of a governor body 20 and a pilot governor 21. The governor body 20 is housed in a governor case 23 installed inside a bottomed cylindrical housing 22. That is, a high-pressure gas inlet 24 is provided on the side surface of the housing 22, and a low-pressure gas outlet
25 are provided. A support pipe 26 provided integrally with the governor case 23 is removably inserted into the low-pressure gas outlet 25 via an O-ring 27. Therefore, the governor case 23 is concentrically supported inside the housing 22 and has an orifice 28
However, a filter support flange 29 is provided at a lower portion, and a plurality of gas inlets 23a are provided at a peripheral wall.

Further, a flange 30 is provided at an upper end of the housing 22, and the flange 30 has an opening 31 of the housing 22.
Is detachably attached by bolts 33. Lower surface of lid 32 and the filter support flange
A filter 35 surrounding the governor case 23 is exchangeably mounted between the filter 35 and the filter 29. The pilot governor 21, the emergency shut-off valve 36, and the safety device 37 are mounted on the upper portion of the lid 32, and are configured to be removable upward from the housing 22 together with the governor body 20.

The high-pressure gas inlet 24 of the housing 22 is connected to a connecting pipe 39.
The inflow-side valve 17 is connected to the gas pipe 40 via the inflow side valve 17. This gas pipe 40
Is substantially L-shaped, and penetrates the side wall 11b of the case 11 to protrude outside the case 11. The low-pressure gas outlet 25 is connected to the outflow-side valve 18 via a communication pipe 41 bent in a substantially S shape, and the outflow-side valve 18 is connected to a gas pipe 42. The gas pipe 40 is bent in a substantially L-shape, penetrates the side wall 11b of the case 11, and
Projecting outside. Further, a wire mesh 43 is stretched over a portion of the connecting pipe 41 that opens to the low-pressure gas outlet 25, and when the governor unit 16 is removed from the housing 22 during maintenance and inspection, tools and parts are connected to the connecting pipe 41. It does not fall inside. Accordingly, the gas passages on the gas inflow side and the gas outflow side of the housing 22 are bent at right angles by the inflow side valve 17 and the outflow side valve 18 as angle valves.
By disposing the outlet valve 18 and the outlet valve 18 in close proximity, the size of the case 11 is reduced.

A gas pipe 42 penetrating the side wall 11b of the case 11
Is a through hole 4 formed in the side wall 11b as shown in FIG.
The gas pipe 42 is inserted into the gas pipe 42, and a flange-like patch 45 is welded to the gas pipe 42, and the outer edge of the patch 45 is fixed to the side wall 11b by welding. A membrane 15 has been applied. The same applies to the gas pipe 40.

Then, the governor unit 16 and the inflow-side valve 17 described above are used.
The outflow side valve 18 is supported on the substantially same plane inside the case 11, and the governor unit 16 housing 22, the inflow side valve 17 and the outflow side valve 18 are embedded in the filling material 60 together with the communication pipes 39 and 41. Have been. The filler 60 is a non-shrinkage concrete or the like mixed with a large number of block-shaped foams 61. The specific gravity of the entire apparatus approaches "1", and even when the apparatus is installed in a place with a high groundwater level, it floats, It is structured to prevent sinking. In addition, filler 60
Has a function of holding the governor unit 16, the inflow-side valve 17 and the outflow-side valve 18 inside the case 11, and has a corrosion prevention effect on piping, and also has a function of preventing damage to each device even in the event of an earthquake or the like. The upper plate 62 of the filler 60 prevents tools and parts from falling to the inner bottom of the case 11 during maintenance and inspection.

Further, an upper portion of the upper plate 62 of the filler 60 is formed in a space 63, in which an opening 65 at one end of an atmosphere communication pipe 64 is opened. This atmosphere communication pipe 64 penetrates the filler 60, penetrates the side wall 11b of the case 11 like the gas pipe 40, protrudes outside the case 11, further rises outside the case 11, and opens the other end opening 66. Is open to the atmosphere.

The governor device configured as described above is directly buried underground such as a sidewalk as shown in FIG. In FIG. 3, reference numeral 67 denotes a ground, and the ground 67 is a state in which a governor device is directly buried by digging a hole 68, and an opening of the hole 68 is closed by a lid 69 having the same height as the ground surface L. ing.

In FIG. 4, a manhole 70 made of a concrete block for protection is installed on the ground 67, and the manhole 70 is configured to have a size that can accommodate the case 11 of the governor device through a slight gap. Through holes 72 and 73 through which the gas pipe 40 and the atmosphere communication pipe 64 are inserted are formed in one side wall of the manhole 70, and through holes 74 through which the gas pipe 42 is inserted through the other side wall.
Are drilled. And the case 11 and manhole
A resin 75 is filled between the passage 70 and the through holes 72 to 74 and the tube wall for waterproofing and buffering.

Drainage holes 77, 77 are formed in the side wall located near the opening 76 of the manhole 70, so that rainwater or the like entering from the opening 76 of the manhole 70 can be drained to the outside of the manhole 70. Further, a plurality of height adjustment frames 78 are stacked on the upper edge of the manhole 70, and a support frame is provided above the height adjustment frames 78.
A lid 80 that closes the opening 76 via 79 is provided. That is, the cover 80 is moved to the ground surface L by the height adjustment frame 78.
The height is adjusted to match.

Above the ground surface L, a ground installation box 82 is installed with a foundation 81, and a self-recording pressure recorder 83,
A seismic control panel 84 and a seismic sensor 85 are installed. The above-mentioned air communication pipe is provided inside the ground installation box 82.
The other end opening 66 of the opening 64 is open. Therefore, the case
The space chamber 63 of 11 is always kept at the atmospheric pressure, and the air communication pipe 64 has an instrumentation pipe 86 connecting the self-recording pressure recorder 83 and the equipment in the case 11, a seismic sensor control panel 84 and An electric signal line 87 and the like connecting an emergency shutoff valve device (not shown) in the case 11 are inserted therein, and the atmosphere communication pipe 64 is also used as a sheath pipe of a pipe, a signal line, and the like.

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

First, when high-pressure gas is supplied from the gas supply source to the gas barrier device via the gas pipe 40, when the inflow-side valve 17 and the outflow-side valve 18 are in the open state, the high-pressure gas is communicated through the inflow-side valve 17. Head to tube 39. The high-pressure gas enters the housing 22 from the communication pipe 39 via the high-pressure gas inlet 24 of the governor unit 16, and further flows into the governor case 23 via the filter 35. At this time, foreign matter and the like contained in the gas are captured by the filter 35, and the high-pressure gas containing no foreign matter is passed through the governor body 20 provided in the governor case 23.
To the support pipe 26. At this time, the primary pressure of the governor body 20 is applied to the pilot governor 21, and the secondary pressure is reduced to a predetermined pressure by the pilot governor 21. That is, the high-pressure gas is reduced to a medium pressure or a low pressure by the governor unit 16 and flows into the communication pipe 41 via the low-pressure gas outlet 25. Since the communication pipe 41 communicates with the outflow-side valve 18, the low-pressure gas flows into the gas pipe 42 via the outflow-side valve 18, and can supply gas at a predetermined pressure to the gas demand side.

In addition, governor unit 16, including pilot governor 21,
In maintenance and inspection of devices such as the emergency shut-off valve 36 and the safety device 37 and replacement work of the filter 35, when in the installation state shown in FIG.
Then, the lid 13 of the case 11 is removed, and the opening 12 of the case 11 is opened. Next, the inflow side valve 17
Then, the operation handles 17a and 18a of the outflow side valve 18 are operated to close the valve, and the bolts 33 provided on the lid 32 of the governor unit 16 are loosened. When the lid 32 is pulled up, the support pipe 26 of the governor case 23 comes out of the low-pressure gas outlet 25, and together with the governor case 23 and the filter 35, the pilot governor 21, the emergency shutoff valve 36, and the safety device mounted on the lid 32. Devices such as 37 can be taken out of the case 11 together. That is, the governor unit including the pilot governor 21
16.Maintenance and inspection of devices such as the emergency shutoff valve 36 and safety device 37 and replacement of the filter 35 can be performed on the ground or at another maintenance shop, etc., and workers enter the narrow manhole 70 and work. There is no need to improve workability and safety.

Further, as described above, by installing the governor unit 16 including the pilot governor 21, the emergency shutoff valve 36 and the safety device 37, and all the inflow-side valve 17 and the outflow-side valve 18 inside the case 11, It is sufficient to provide one manhole 70 at 71, and even when buried underground such as a sidewalk with a small width, there is no fear of interference with other buried objects and the construction is simple. In addition, since the high-pressure gas is not directly introduced into the case 11 and the high-pressure gas is introduced into the governor case 23 of the governor unit 16, the case 11 does not need to be formed in a pressure-resistant container, and the inside of the case 11 is filled. The material 60 is non-shrinkage concrete mixed with a large number of block-shaped foams 61. Since the specific gravity of the entire device is close to "1", it floats even when the device is installed in a place with a high groundwater level. And can be prevented from sinking or sinking, and is particularly effective when buried in soft ground.

〔The invention's effect〕

As described above, according to the present invention, an inflow valve connected to the inflow side of the gas pipe and an outflow valve connected to the outflow side of the gas pipe are provided inside the watertight structure case. A governor unit which is connected to the two valves by piping and adjusts the pressure of the inflowing gas to allow the gas to flow out is provided in a detachable manner. The pressure is reduced to a medium pressure or a low pressure and supplied to a gas demand side through an outlet valve.

Therefore, it is sufficient to provide one manhole on the ground, and even when buried underground such as a narrow sidewalk, there is no fear of interference with other buried objects, the construction is simple, and the governor unit is attached and detached. Since it is freely installed, maintenance and inspection and filter replacement work can be performed on the ground or at another maintenance shop, eliminating the need for workers to work inside narrow manholes, improving workability and safety. The effect is that the performance can be improved.

Furthermore, by filling the inside of the case with a filler together with the foam, and burying the inflow-side valve, the outflow-side valve, the governor unit, and the communication pipe, the anticorrosion effect thereof and prevention of damage to each device due to an earthquake or the like. it can. In addition to the fact that the equipment installed underground can be prevented from rising and sinking, even if tools or parts fall during maintenance and inspection, they can be received on the top surface of the filler, preventing them from falling to the inner bottom of the case. There is.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 to 4 show an embodiment of the present invention. FIG. 1 is a longitudinal sectional side view of a governor device, and FIG. 2 is an enlarged view of part II in FIG. Sectional view, FIG. 3 is a longitudinal side view in which the governor device is directly buried in the ground, FIG. 4 is a longitudinal side view in which the governor device is installed in a manhole, and FIG. 5 is a schematic diagram of a general governor device. FIGS. 6 and 7 are schematic diagrams showing different installation states of the conventional governor device. 11 ... case, 12 ... opening, 13 ... lid, 16 ... governor unit, 17 ... inflow side valve, 18 ... outflow side valve, 40, 42 ... gas piping.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Isao Kaneko Inventor No. 221 Takasago Apartment 221 Takasago 2-2-7 Takasago, Katsushika-ku, Tokyo (72) Inventor Nobuhiro Matsumura 4-15-11 Sekiyama, Hasuda-shi, Saitama (72 Inventor Isamu Saito 4-15-25-707 Teshima, Kita-ku, Tokyo (72) Inventor Hiromichi Ozome 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Inside Nippon Kokan Co., Ltd. (72) Inventor Akira Sasaki Tokyo Nippon Kokan Co., Ltd., 1-2-1, Marunouchi, Chiyoda-ku (72) Inventor Osamu Arata 414-2 Kawakami-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture 209 Town of Light 209 (72) Inventor Yasuo Fujitani 5-5-Ayanishi, Ayase-shi, Kanagawa Prefecture 5-7 (56) References Japanese Utility Model Showa 57-60967 (JP, U)

Claims (1)

(57) [Claims] 1. A governor device provided in the middle of a gas pipe for adjusting a gas pressure to be supplied, wherein the case has a watertight structure having a detachable lid, and is connected to an inflow side of the gas pipe provided inside the case. And an outlet valve that is also installed inside the case and is connected to the outlet side of the gas pipe, and the inlet valve and the outlet valve that are also detachably installed inside the case and A governor unit that is connected to a pipe and adjusts the pressure of the inflowing gas to flow out, and a filler that is filled together with the foam inside the case and that has the inflow-side valve, the outflow-side valve, the governor unit, and the connection pipe embedded therein. A governor device comprising: