JPH087630B2 - Governor equipment - Google Patents

Description

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

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

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

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 supplied to the gas demand side 3 after the medium pressure gas is reduced to a low pressure or the high pressure gas is reduced to a medium pressure or a low pressure by the main body 7. 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 controlling gas pressure of Japanese Patent Publication No. 63-11552 described above is a type in which high-pressure gas is directly introduced into the housing, and the housing is used as a pressure vessel. Need to be formed. Therefore, it is necessary to inspect by X-ray or the like after setting the material and thickness of the housing. 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, the first manhole b that houses the housing a that houses each device, and the second manhole c and the third manhole d on both sides of the first manhole b are provided. Then, 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-connected to the inflow side valve e to form a gas outflow pipe h. Must be flanged to the outflow side 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 that house this type of gas control equipment are generally constructed on sidewalks, but in overcrowded cities such as Japan, the width of the sidewalks is narrow and other buried objects (water supply Pipes, power lines and communication cables, etc.)
Since it is buried, it is difficult to select the installation site especially when installing three manholes adjacent to each other so as not to interfere with these buried objects. Further, it is necessary to open the lids of the three manholes at the time of maintenance and inspection, and to close the lids watertight when the work is finished.

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. Further, even in the case of the pit q, it is necessary to have a double lid structure provided with a detachable outer lid r and an inner lid s so as to prevent rainwater and the like from entering, which makes maintenance and inspection troublesome work.

The present invention has been made in view of the above circumstances, and an object thereof is to make a case accommodating a governor unit for adjusting the pressure of inflowing gas to flow out, a watertight structure, and a space chamber of the case. It is an object of the present invention to provide a highly safe governor device which can keep the pressure on the secondary side constant by always keeping the pressure at atmospheric pressure.

[Structure of Invention]

(Means and Actions for Solving the Problems) In order to achieve the above object, the present invention provides a space chamber inside a watertight case and is connected to the inflow side of a gas pipe inside the case. An inflow side valve, an outflow side valve connected to the outflow side of the gas pipe, and a pipe unit connected to the both valves to detachably install a governor unit for adjusting the pressure of the inflowing gas to flow out. One end of the atmosphere communication pipe opens into the space chamber,
The other end is in communication with the atmosphere.

The high-pressure gas that has flowed into the governor unit from the gas supply source via the inflow side valve is depressurized to medium pressure or low pressure by the governor unit and supplied to the gas demand side via the outflow side valve. Further, the space chamber of the case is always kept at atmospheric pressure by the atmosphere communication pipe.

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

FIG. 1 shows the entire governor device. Reference numeral 11 denotes a steel rectangular parallelepiped case, and an opening 12 is provided in the upper part. 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 above, 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 integrally provided with the governor case 23 is detachably 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 the flow measurement orifice 28 is provided above the governor case 23.
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 on the upper end of the housing 22, and the flange 30 has an opening 31 of the housing 22.
A lid 32 for closing the is attached by a bolt 33 in a detachable manner. The lower surface of the 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 shutoff valve 36, and the safety device 37 are mounted on the upper portion of the lid 32, and are configured so that they can be removed together with the governor main body 20 from the housing 22 upward.

Further, the high pressure gas inlet 24 of the housing 22 is connected to the 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 curved into a substantially L-shape and penetrates the side wall 11b of the case 11 so that the case 11 is able to pass through.
Protruding to the outside. Further, a wire net 43 is stretched at a portion of the communication pipe 41 that opens to the low-pressure gas outlet 25, and when the governor unit 16 is removed from the housing 22 for maintenance and inspection, tools, parts, and the like are connected to the communication pipe 41. I try not to fall inside. Therefore, the gas passages on the governor inflow side and the gas outflow side of the housing 22 are bent at a right angle by the inflow side valve 17 and the outflow side valve 18 as angle valves, and the inflow side valve with respect to the housing 22.
The case 11 is downsized by installing the valve 17 and the outflow-side valve 18 close to each other.

In addition, the gas pipe 42 that penetrates 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.
The outflow side valve 18 is supported on the substantially same plane inside the case 11, and the housing 22 of the governor unit 16 is provided.
The inflow side valve 17 and the outflow side valve 18 are embedded inside the filling material 60 together with the connecting pipes 39 and 41. The filler 60 is a non-shrinkable concrete or the like in which a large number of block-shaped foams 61 ... Are mixed, and the specific gravity of the entire device approaches "1", and even if the device is installed in a place with high groundwater level, It has a structure that prevents it from sinking. In addition, the filling material
The 60 has a role of holding the governor unit 16, the inflow side valve 17, and the outflow side valve 18 inside the case 11 and an anticorrosion effect of 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. The atmosphere communication pipe 64 penetrates the filling material 60, penetrates the side wall 11b of the case 11 and projects to the outside of the case 11 similarly to the gas pipe 40, rises outside the case 11, and the other end opening 66 is formed. Is open to the atmosphere.

The governor device configured as described above is directly buried in a basement such as a sidewalk as shown in FIG. In FIG. 3, reference numeral 67 denotes the ground, which is a state in which a hole 68 is dug in the ground 67 to directly bury the governor device, and the 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 has a size capable of accommodating the case 11 of the governor device through a slight gap. Through holes 72 and 73 through which the gas pipe 52 and the atmosphere communication pipe 64 are inserted are formed on one side wall of the manhole 70, and through holes 74 through which the gas pipe 59 is inserted are formed on the other side wall.
Has been 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 adjusting frames 78 ... Are stacked on the upper edge of the manhole 70, and a supporting frame is provided on the upper part thereof.
A lid 80 for closing the opening 76 via 79 is provided. That is, the lid 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 atmosphere communication pipe is provided inside the ground-installed box 82.
The other end opening 66 of 64 is open. Therefore, the case
The space chamber 63 of 11 is always kept at atmospheric pressure, and the atmosphere communication pipe 64 includes an instrumentation pipe 86 connecting the self-recording pressure recorder 83 and the equipment in the case 11, and a seismic control panel 84. An electrical signal line 87 or the like connecting to an emergency shutoff valve device (not shown) in the case 11 is inserted, and the atmosphere communication pipe 64 is a pipe or signal wiring portion 64a.
Is formed.

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 governor device through the gas pipe 40, when the inflow-side valve 17 and the outflow-side valve 18 are open, the high-pressure gas is communicated through the inflow-side valve 17. Head to tube 39. The high-pressure gas enters the inside of 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 this communication pipe 41 communicates with the outflow side valve 18, the low-pressure gas flows into the gas pipe 42 through the outflow side valve 18 and can supply the gas of a predetermined pressure to the gas demand side.

In addition, the governor unit 16 including the 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. Then, when the lid 32 is pulled up, the support pipe 26 of the governor case 23 comes out from the low-pressure gas outlet 25, and together with the governor case 23 and the filter 35, the pilot governor 21 mounted on the lid 32, the emergency shutoff valve 36 and the safety device. Devices such as 37 can be taken out from 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 all the equipment such as the governor unit 16 including the pilot governor 21, the emergency shutoff valve 36, the safety device 37, and the inflow side valve 17 and the outflow side valve 18 inside the case 11, One manhole 70 may be provided in 71, and even when it is buried underground such as a sidewalk with a narrow width, there is no risk of interference with other buried objects, and construction is easy. 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, the case for accommodating the governor unit for adjusting the pressure of the inflowing gas to flow out can be made watertight, and the space chamber of the case can be always kept at the atmospheric pressure. Therefore, even if the space room of the case is affected by the outside air temperature and the outside air pressure, the inner pressure is kept equal to the atmospheric pressure, the pressure regulation performance is kept constant, and the pressure on the secondary side can be kept constant. It is highly safe and does not require the case to be a pressure-resistant container, so it can be provided at a low price. Further, according to the governor device having the above-mentioned configuration, it is sufficient to provide one manhole in the ground, and even when the manhole is buried underground such as a sidewalk having a narrow width, there is no fear of interference with other buried objects, and construction can be performed. It is simple, and since the governor unit is detachably installed, maintenance / inspection and filter replacement work can be performed on the ground, and there is no need for workers to enter inside a narrow manhole and work efficiency is improved. There is an effect that improvement and safety can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 to 4 show an embodiment of the present invention. FIG. 1 is a vertical sectional side view of a governor device, and FIG. 2 is an enlarged view of part II of FIG. Sectional view, FIG. 3 is a vertical side view of the governor device directly embedded in the ground, FIG. 4 is a vertical side view of the governor device installed in a manhole, and FIG. 5 is a schematic view of a general governor device. FIG. 6 is a schematic configuration diagram showing different installation states of a conventional governor device. 11 ... Case, 12 ... Opening part, 13 ... Lid, 16 ... Governor unit, 17 ... Inflow side valve, 18 ... Outflow side valve, 40, 42 ... Gas pipe, 63 ... Space chamber, 64 ... Atmosphere communication pipe, 64a ... Cabling section, 8
6 ... Piping, 87 ... Signal line.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Isao Kaneko 3-2-7 Takasago, Katsushika-ku, Tokyo No. 221, Takasago Apart (72) Inventor Nobuhiro Matsumura 4-15-11 Sekiyama, Hasuda City, Saitama Prefecture (72) Inventor Isamu Saito 4-15-25-707 Teshima, Kita-ku, Tokyo (72) Inventor Hiromichi Ozoe 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nihon Kokan Co., Ltd. (72) Inventor Akira Sasaki Tokyo 1-2 1-2 Marunouchi, Chiyoda-ku Nihon Kokan Co., Ltd. (72) Inventor Osamu Arata 415-2 Kawakami-cho, Totsuka-ku, Yokohama, Kanagawa 209 Town of light 209 (72) Inventor Yasuo Fujitani 5 Ayanishi, Ayase-shi, Kanagawa ―5-7 (56) References JP 58-3508 (JP, A) Actual Open 57-60967 (JP, U) Actual Open 56-91751 (JP, U) Actual Open 61-126736 (JP , U)

Claims (1)

[Claims] 1. A governor device for adjusting a gas pressure to be supplied, which is provided in the middle of a gas pipe, and has a watertight structure case having a detachable lid and a space chamber inside.
An inflow valve installed inside the case and connected to the inflow side of the gas pipe, and an outflow valve installed inside the case and connected to the outflow side of the gas pipe,
Similarly, a governor unit that is detachably installed inside the case and is connected to the inflow side valve and the outflow side valve by piping to adjust the pressure of the inflowing gas to flow out, and an opening portion at one end in the space chamber of the case. A governor device comprising: an air communication pipe that is open and has the other end opening communicating with the atmosphere.