JP6208446B2 - Blower support and ventilation system - Google Patents

Description

  The present invention relates to a blower support and a ventilation system. In particular, the present invention relates to a blower support and a ventilation system suitable for application to underground pipe dredging or underground pipe lines.

  In the case of manual work such as maintenance and inspection in underground pipes or underground pipes (hereinafter simply referred to as “pipe pipes”) such as sewers, workers enter the pipes through manholes. It is common to do. There is a possibility that the inside of the pipe will be in an oxygen-deficient state, and there is a possibility that toxic gas such as hydrogen sulfide may be generated.

  Non-Patent Document 1 is a report on work safety in sewer pipes, and describes recommendations based on the analysis of accident cases and specific safety matters. In particular, on page 27 of Non-Patent Document 1, as a ventilation method in the tube, “Installing a fan considering the wind direction of the outside air, supplying air from one side, and exhausting from the other side to the outside, Ventilation is performed. At this time, the wind speed in the tube is set to 0.8 m / second or more ”, an image of the cleaning operation is illustrated, and examples of the fan and the duct are illustrated by photographs. According to the image of the cleaning operation, air is supplied and exhausted by a fan inserted into both the air supply side and exhaust side human holes and connected to the ground surface side of each duct.

  Patent Document 1 discloses a manhole intake / exhaust device, and Patent Document 2 discloses an underground structure ventilator.

JP 2000-104966 A JP 2003-328378 A

Sewer pipe work safety management committee, “Interim report on the safety management of sewer pipe work”, April 2002 (http://jascoma.com/siryou/k_200804_cyukanhoukoku.pdf)

  Applying fans and ducts to manholes as described in “Image of cleaning work” described in Non-Patent Document 1, and supplying and exhausting air can ensure worker safety and ensure work safety. In order to do so, it is necessary to do so. On the other hand, the duct inserted into the human hole closes the opening of the human hole, which is inconvenient for the worker to enter and exit or to carry parts in and out with the duct inserted into the human hole. In addition, if there is not enough space for people to enter and exit or to carry in / out goods between the manhole opening and the duct, it is necessary to remove the duct from the manhole and temporarily stop air supply or exhaust The situation which must be done arises and it is not preferable in safety management. Furthermore, when an emergency such as the generation of toxic gas occurs during work in the pipe, it is necessary to evacuate the worker from the pipe quickly.

  An object of the present invention is to provide a blower that is installed in a manhole opening, in which an operator can easily go in and out or carry an article in and out. Moreover, the objective of this invention is providing the ventilation system in the pipe tub using the said air blower.

  In order to solve the above-mentioned problem, in the first aspect of the present invention, a blower support for supporting a blower for sending air to the inside of a human hole, the opening surface of the human hole and the lower surface of the blower A blower support that supports the blower above the opening of the human hole so as to form a gap that allows a person to pass therethrough.

  You may further provide the throttle mechanism which restrict | squeezes the flow of the air from the said air blower between the said air blower and the said human hole. You may further provide the enclosure mechanism which encloses the flow path of the air from the said air blower to the said human hole. You may further provide the fixing mechanism which fixes the said air blower support body to the opening part of the said human hole. A flexible member that hangs down inside the human hole may further include an airflow reflecting member that changes the direction of the airflow from the vertical direction to the horizontal direction. You may further have a fragrance | flavor supply means which supplies a fragrance | flavor to the air sent inside the said human hole.

  According to a second aspect of the present invention, there is provided a ventilation system for an underground pipe culvert or an underground pipeline using a blower mechanism having the blower support described above and a blower supported by the blower support. Among the plurality of human holes connected to the underground pipe trough or the underground pipe line, at least one of the other human holes different from the human hole in which the air blowing mechanism is installed in at least one human hole is installed. Provide a ventilation system with an exhaust system installed in one.

  The exhaust device may be installed in a first human hole downstream of the human hole in which the blower is installed. Air flow that changes the direction of the air flow from the vertical direction to the horizontal direction or from the horizontal direction to the vertical direction at the bottom of either or both of the human hole where the blower is installed and the human hole where the exhaust device is installed A reflector may be installed.

  It should be noted that the above summary of the invention does not enumerate all the necessary features of the present invention. In addition, a sub-combination of these feature groups can also be an invention.

1 shows a ventilation system 100 for a sewer pipe. An example of the ventilation mechanism arrange | positioned in the manhole opening part is shown. It is a top view of the air blowing mechanism 160. A sewer plumbing ventilation system 200 is shown. 1 shows a ventilation system 400 for a sewer pipe. 1 shows a ventilation system 600 for a sewer pipe.

  Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the invention according to the claims. In addition, not all the combinations of features described in the embodiments are essential for the solving means of the invention.

  FIG. 1 shows a ventilation system 100 for a sewer pipe. In FIG. 1, the ventilation system 100 is mainly shown in a cross section, but some portions are not cross sections (hereinafter, the same applies to FIGS. 4, 5, and 6). The ventilation system 100 ventilates a pipe 110 buried under the ground surface 102. The pipe rod 110 is an underground space defined by a bottom portion 114 and a wall surface 112, and has a horseshoe-shaped cross section, for example. A manhole 116 and a manhole 118 are provided between the tube 110 and the ground surface 102, and an operator can enter the tube 110 through the manhole 116 or the manhole 118. In the present embodiment, the case where the tube 110 between the human hole 116 and the human hole 118 is ventilated will be described. The human hole 116 is on the air supply side, and the human hole 118 is on the exhaust side. Although the case where the human hole 116 and the human hole 118 are adjacent to each other will be described here, the human hole 116 and the human hole 118 do not need to be adjacent to each other. A blocking curtain 120 may be provided in the tube rod 110 in order to block the tube tube region between the human hole 116 and the human hole 118 from other tube tube regions. Efficient ventilation can be achieved by the blocking curtain.

  A blower mechanism 160 is installed at the opening of the air supply side human hole 116, and an exhaust device 170 is installed at the exhaust side human hole 118. The exhaust device 170 is a conventional fan-type exhaust device, and a duct 172 connected to the exhaust device 170 is inserted into the human hole 118. The air blowing mechanism 160 may be installed in a plurality of human holes, and the exhaust device 170 may be installed in a plurality of human holes. The human hole 118 is preferably the first human hole located downstream of the human hole 116. By arranging the blower mechanism 160 on the upstream side and the exhaust device 170 on the downstream side, air can be fed along the flow of sewage. Further, by arranging the air blowing mechanism 160 and the exhaust device 170 between the adjacent human holes, the distance between the air supply and the exhaust can be shortened and the ventilation efficiency can be improved.

  FIG. 2 shows an example of the air blowing mechanism 160 installed in the human hole opening 116b. FIG. 3 is a top view of the air blowing mechanism 160. In FIG. 2, the human hole 116 is shown in cross section, but the air blowing mechanism 160 is shown as a schematic side view. Reference numeral 116a denotes a manhole inner wall.

  The blower mechanism 160 includes a blower 140 and a blower support 150. The blower 140 is a conventional fan-type blower having rotating blades 142. By using a conventional fan blower as the blower 140, the ventilation system 100 can be configured easily and inexpensively. Also, by using a conventional fan blower, a large amount of wind can be sent into a substantially atmospheric pressure space such as the inside of a human hole without causing a large pressure loss.

  The blower support 150 supports the blower 140 for sending air into the human hole 116. In addition, the blower support 150 supports the blower 140 above the opening of the human hole 116 so as to form a gap that allows a person to pass between the opening surface of the human hole 116 and the lower surface of the blower 140. Here, the opening surface of the human hole 116 refers to a virtual surface of the human hole opening 116b at the same level as the ground surface 102. A gap that allows a person to pass between the opening surface of the human hole 116 and the lower surface of the blower 140 is formed, so that an evacuation route for the worker in an emergency can be secured, and the worker can enter and exit, Carrying out becomes easy. Note that the “gap that allows a person to pass through” can be derived from the assumed physique of the worker. A small worker seems to be able to pass through a gap of 30 cm to 50 cm, and a large worker seems to need a gap of about 50 cm to 1 m. Therefore, assuming a worker with various physiques, a gap of about 30 cm to 1 m can be exemplified. In addition, if the gap is too large, the efficiency of air supply into the human hole 116 is lowered. Therefore, it is preferable that the gap is small. From this viewpoint, the gap is preferably 1 m or less. However, this is not intended to limit the upper limit of the gap to 1 m. The gap can be made larger as long as sufficient air supply efficiency is obtained.

  The blower support 150 includes a base portion 152 and a leg portion 154. The blower 140 is installed on the base portion 152, and a route for an operator or the like can be secured between the leg portions 154. In addition, although the leg part 154 has illustrated four, it is not restricted to four. The leg 154 may be provided with a fixing mechanism that fixes the blower support 150 to the opening of the human hole 116. As the fixing mechanism, a combination of a hook hooked on the human hole opening 116b and a wire fixed to the leg 154 can be exemplified. In addition, the air blower 140 can be made removable from the base part 152. Moreover, the length of the leg part 154 can be made variable, and the clearance gap between the opening surface of the human hole 116 and the lower surface of the air blower 140 can be adjusted.

  The blower support 150 further includes a throttle mechanism 156. The throttle mechanism 156 is disposed between the blower 140 and the human hole 116 and has a function of restricting the flow of air from the blower 140. The aperture mechanism 156 can be configured by installing an appropriately sized plate at an appropriate angle. Alternatively, a funnel-shaped member having an appropriate curvature may be used. The size, angle, and the like of the diaphragm mechanism 156 can be made variable. By making the size, angle, etc. of the diaphragm mechanism 156 variable, it is possible to deal with human holes of various sizes (openings).

  By optimizing the throttle mechanism 156, the air flow from the blower 140 is appropriately narrowed down, and the narrowed air flow is sent into the human hole 116. Secondly, an ejector effect that generates an air flow can be produced. Ventilation efficiency can be improved by sending a secondary air flow due to the ejector effect into the human hole 116. In addition, you may provide the enclosure mechanism which encloses the flow path of the air from the air blower 140 to the human hole 116 with a board etc., for example. In this case, outflow of the narrowed air flow to the outside can be suppressed.

  According to the ventilation system 100 of the present invention, while ensuring the same performance (wind speed and air volume) as before, it is easy for an operator to enter and exit, and to carry in and out articles, and to stop the operation of the blower mechanism 160 when carrying in and out. There is no need. Furthermore, an escape route in an emergency can be secured, and the operator's safety can be further improved.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

  For example, FIG. 4 shows a sewer plumbing ventilation system 200. The ventilation system 200 changes the direction of the air flow from the vertical direction to the horizontal direction or the horizontal direction at the bottom of one or both of the human hole 116 where the air blowing mechanism 160 is installed and the human hole 118 where the exhaust device 170 is installed. An air flow reflector 202 is installed to convert from vertical to vertical. By such an air flow reflecting plate 202, the air flow is adjusted and the energy loss of the air flow that occurs when the direction of air flow is changed is reduced, thereby realizing a smoother flow. The flow velocity and air volume inside can be increased.

  FIG. 5 also shows a ventilation system 400 for a sewer pipe. In the ventilation system 400, a booster 402 is provided in the tube 110. The booster 402 includes a blower similar to the blower mechanisms 160 and 340, and compressed air is supplied from the booster compressor 460 through the booster pressure pipe 462. The booster 402 generates an air flow in a direction that promotes the flow in the pipe rod 110. According to the ventilation system 400, the booster 402 enhances the air flow in the pipe rod 110, and can further increase the safety of the operator.

  Further, as shown in FIG. 6, the air blowing mechanism 160 may include an air flow reflecting member 602. The air flow reflecting member 602 is a flexible member such as nylon, for example, and changes the direction of the air flow from the vertical direction to the horizontal direction. The air flow reflecting member 602 is suspended from the lower portion of the human hole 116 by, for example, a string member 604 in a state where the air flow reflecting member 602 is installed in the human hole opening 116b. The air flow reflecting member 602 and the string member 604 can be stored compactly by being folded, and can be deployed simply by being installed at the manhole opening 116b and hanging down, which is convenient.

  Further, in the above-described embodiment, there may be further provided fragrance supplying means for supplying the fragrance to the air sent into the human hole 116. As the fragrance supplying means, the fragrance may be simply placed at the air inlet or the like. By supplying the fragrance, it is possible to inform the worker who is working inside the tube rod 110 that the air is normally supplied.

  Further, in the above-described embodiment, the example in which the blower 140 is installed on the base 152 of the blower support 150 has been shown. However, the blower 140 is installed at a position away from the blower 140 and the air flow from the blower 140 is ducted. May be supplied to the position of the base portion 152.

  In the above-described embodiment, the example in which the air flow is throttled by the throttle mechanism 156 has been described. For example, the rotating blades of the blower 140 are a double blade of an outer peripheral blade and an inner peripheral blade, You may comprise so that an air flow may be restrict | squeezed by changing the rotational speed of an inner peripheral blade.

  100 Ventilation System, 102 Ground Surface, 110 Pipe Fence, 112 Wall Surface, 114 Bottom, 116 Manhole, 116a Manhole Inner Wall, 116b Manhole Opening, 118 Manhole, 120 Blocking Curtain, 140 Blower, 142 Rotor, 150 Blower Support Body, 152 base, 154 legs, 156 throttle mechanism, 160 air blow mechanism, 170 exhaust device, 172 duct, 200 ventilation system, 202 air flow reflector, 400 ventilation system, 402 booster, 460 compressor for booster, 462 for booster Pressure tube, 600 Ventilation system, 602 Air flow reflecting member, 604 String material.

Claims (8)

A blower support that supports a blower for sending air to the inside of the human hole,
Supporting the blower above the opening of the human hole so as to form a gap that allows a person to pass between the opening surface of the human hole and the lower surface of the blower ,
A blower support having a flexible member that hangs down inside the human hole and has an airflow reflecting member that changes the direction of airflow from a vertical direction to a horizontal direction . The blower support body according to claim 1, further comprising a throttle mechanism that restricts a flow of air from the blower between the blower and the human hole. The blower support according to claim 1, further comprising an enclosure mechanism that encloses an air flow path from the blower to the human hole. The blower support according to any one of claims 1 to 3, further comprising a fixing mechanism that fixes the blower support to the opening of the human hole. The blower support according to any one of claims 1 to 4 , further comprising a fragrance supply means for supplying a fragrance to the air sent to the inside of the human hole. An underground pipe culvert or underground conduit ventilation system using a blower mechanism comprising the blower support according to any one of claims 1 to 5 and a blower supported by the blower support. And
Among the plurality of human holes connected to the underground pipe culvert or the underground pipeline, the air blowing mechanism is installed in at least one human hole, and at least other human holes different from the human hole in which the air blowing mechanism is installed One ventilation system with an exhaust system installed. The ventilation system according to claim 6 , wherein the exhaust device is installed in a first human hole on a downstream side along a flow of sewage from a human hole in which the air blowing mechanism is installed. A ventilation system for underground pipes or underground pipes using a blower mechanism,
The blowing mechanism is
Support the blower for sending air to the inside of the human hole, and form the gap between the opening surface of the human hole and the lower surface of the blower so that a person can pass through the blower. A blower support that supports the sky,
A blower supported by the blower support,
Among the plurality of human holes connected to the underground pipe culvert or the underground pipeline, the air blowing mechanism is installed in at least one human hole, and at least other human holes different from the human hole in which the air blowing mechanism is installed One is an exhaust system,
Air that changes the direction of the air flow from the vertical direction to the horizontal direction or from the horizontal direction to the vertical direction at the bottom of one or both of the human hole where the blower mechanism is installed and the human hole where the exhaust device is installed Install a flow reflector
Ventilation system.

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