JP5075808B2 - Cover of sewerage facilities and method of use - Google Patents

Description

  The present invention relates to a cover used for covering an upper part of a sewerage facility and a method of using the cover.

  In sewerage facilities such as the first sedimentation basin, reaction tank, and final sedimentation basin, the upper part is covered with a cover for the purpose of preventing the spread of malodor.

  Usually, a plurality of cover covers are spanned over a casing forming a sewerage facility in a state where a plurality of cover covers are arranged adjacent to each other in the width direction, and a deodorizing duct is connected to several tens of the cover covers at a rate of about one place. The deodorization duct is for guiding the odor gas generated from the on-site treated water accommodated in the sewerage facility to the outside of the cover and sending it to the deodorizer installed around the sewerage facility.

  Also, in recent years, paying attention to the fact that this sewerage facility is provided in a large area in a place with good solar radiation conditions, a solar cell module such as a solar cell panel is installed on the upper surface of the cover and performs solar power generation. Attempts have been made (see Patent Document 1).

  However, the conventional deodorization duct protrudes upward from the center portion of the cover, further extends in a horizontal direction from a predetermined height (around 3 to 5 m above the cover), passes over the other cover, and deodorizers The solar cell module installed on the upper surface of the cover lid is shaded by the deodorizing duct. Normally, the solar cell modules installed on the upper surface of the cover are connected in series, so when some of them are in the shade, the cells in the shaded part do not generate electricity, and only the cells in the other part generate electricity and generate current. Since the cells flow, the shaded cells generate resistance and generate heat, leading to a decrease in power generation efficiency.

  In addition, in order to dispose the deodorizing duct so as to pass above the cover lid as described above, it is necessary to build a large number of supports (supports) for supporting the deodorizing duct, which increases the construction cost. is there. Moreover, when the deodorizing duct is arranged above the cover, the treatment place becomes cluttered and the landscape becomes worse.

  Further, as described above, the odor duct protrudes upward from the center of the cover, and the odor sampling port for collecting the odor gas to measure the odor of the odor gas generated from the on-site treated water is provided on the deodorization duct. Since it is provided in the vicinity of the connecting portion with the cover, in order to perform measurement, it is necessary to go to the center of the cover and perform odor sampling. In addition, the odor duct needs to be drained at regular intervals to remove the water accumulated in the interior, but the valve for draining is also near the connection with the cover of the odor duct, Since it is provided in the vicinity of the support, the work must be performed up to the center of the cover and the upper part of the support, which is troublesome and dangerous.

  Further, as described above, since the deodorizing duct is connected at a ratio of about one to several dozen adjacent cover covers, odor is sucked into the deodorizing duct in the vicinity of the cover cover to which the deodorizing duct is connected. However, as the distance from the cover to which the deodorizing duct is connected increases, it becomes difficult for odors to be sucked into the deodorizing duct. Therefore, uniform deodorization cannot be performed at all positions, and the degree of deodorization varies depending on the position.

  In addition, conventionally, the cover and the duct are individual structures, and it has been necessary to manufacture and install each of them. Therefore, there is a problem that the manufacturing cost is high and the installation period is long. .

  Patent Document 2 discloses a deodorizing function provided to the cover itself without disposing a deodorization duct from the cover to the external deodorization device (deodorization tower). In the cover, most of the electric power generated in the solar cell module is consumed by the exhaust fan attached to the cover, so that the power can hardly be used for other purposes.

JP 2005-340704 A JP 2005-66405 A

  The present invention has been made in view of such conventional circumstances, and the object of the present invention is that the power generation efficiency of the solar cell module installed on the upper surface of the cover is high, reducing the construction cost and shortening the construction period. It is possible to easily and safely carry out maintenance management such as odor measurement and drainage work of odor ducts, and when multiple sheets are arranged adjacent to each other, odors should be sucked evenly at all positions. It is possible to provide a cover for sewerage facilities with a good landscape.

  In order to achieve the above object, according to the present invention, the following cover, cover assembly, and method of using the cover are provided.

[1] A cover for covering the upper part of the sewerage facility, which is inclined at a predetermined angle in the length direction of the cover and has a solar cell module installed on the surface thereof, and an upper end of the upper cover A back plate extending downward, and two side plates connecting the side end portions of the top plate and the back plate, and surrounded by the top plate, the back plate, and the side plate inside the cover An internal space having an open bottom is formed, and at least one of the two side plates is configured to guide odorous gas generated from on-site treated water stored in the sewer facility to the outside of the cover. Cover for sewerage facilities with deodorizing ducts leading to the interior space.

[2] The cover according to [1], wherein the back plate is provided with an openable / closable inspection port for inspecting the inside of the cover.

[3] The cover according to [2], wherein the upper surface plate is also provided with an openable / closable inspection port for inspecting the inside of the cover.

[4] The cover according to any one of [1] to [3], wherein an inclination angle of the upper surface plate is greater than 0 ° and not greater than 30 °.

[5] The cover according to any one of [1] to [4], wherein an angle formed by an outer surface of the back plate and a horizontal surface is 90 to 150 °.

[6] The wiring space according to any one of [1] to [5], wherein the internal space is provided with a wiring storage chamber for storing wiring of the solar cell module, which is partitioned from other portions of the internal space. The cover of.

[7] The cover according to [6], wherein the back plate is provided with an openable / closable inspection port that communicates from the outside of the cover to the wiring housing chamber.

[8] The cover according to any one of [1] to [7], wherein LED lighting is provided in the internal space.

[9] The cover according to any one of [1] to [8], wherein the deodorization duct is provided with an odor sampling port for collecting odor gas generated from the on-site treated water housed in the sewer facility.

[10] The cover according to any one of [1] to [9], wherein a water spout for spraying in-site treated water of the sewer facility is provided on the upper surface plate.

[11] The cover according to any one of [1] to [10], wherein an opening area adjusting means for adjusting an opening area of the opening communicating with the internal space is provided on a side surface of the deodorizing duct.

[12] A cover assembly in which a plurality of cover covers according to any one of [1] to [11] are arranged adjacent to each other in the width direction, and the deodorizing ducts of adjacent cover covers are connected to each other.

[13] A method of using a cover according to any one of [1] to [11], wherein the cover according to any one of [1] to [11] is arranged and used so that the lower side of the inclined surface of the cover is in the direction from southeast to south to southwest. .

  According to the cover of the present invention and a cover assembly formed by arranging a plurality of adjacent covers, the solar cell module installed on the upper surface of the cover cannot be shaded by the deodorizing duct, and high power generation efficiency can be obtained. Moreover, since it is not necessary to raise the deodorizing duct to the vicinity of 3 to 5 m above the cover as in the prior art, it is not necessary to construct a support (support) for supporting the deodorizing duct above the cover. As well as reducing, the landscape of the treatment plant will also improve. Moreover, the length of a deodorizing duct can be shortened compared with the past. In addition, since the deodorizing duct communicates with the internal space of each cover, odor gas can be sucked in each cover, and there is no bias in all positions of the sewerage facilities covered by multiple covers. Equal deodorization is possible. Furthermore, since the odor duct is located at a low position, it is possible to easily and safely perform maintenance management such as odor measurement and drainage work of the odor duct without the operator climbing to a high place. Furthermore, the cover and the deodorizing duct are not individual structures as in the past, but the two are an integral structure and can be integrally formed, so the manufacturing cost of the cover including the deodorizing duct is possible. Can be reduced, and the construction period can be shortened.

  Hereinafter, the present invention will be described based on specific embodiments, but the present invention should not be construed as being limited thereto, and based on the knowledge of those skilled in the art without departing from the scope of the present invention. Various changes, modifications, and improvements can be added.

  1-3 show an example of an embodiment of a cover according to the present invention. FIG. 1 is a perspective view, FIG. 2 is a side view, and FIG. 3 is a cross-sectional view cut along the longitudinal direction of the cover. The cover according to the present invention is used to cover the upper part of the sewerage facility. In the present invention, the “sewage facility” means a water tank or pond that performs various types of sewage treatment, storage, or the like, such as a first sedimentation basin, a reaction tank, and a final sedimentation basin.

  As shown in FIGS. 1 to 3, the cover 1 according to the present invention has a top plate 2, a back plate 3, and two side plates 4 that connect between side end portions of the top plate 2 and the back plate 3.

The upper surface plate 2 is inclined at a predetermined angle in the length direction of the cover 1, and the solar cell module 6 is installed on the surface thereof. As described above, when the upper surface plate 2 is inclined, rain and snow that have fallen on the solar cell module 6 naturally flow down and hardly stay on the solar cell module 6. It is possible to prevent the power generation efficiency from being reduced due to light being blocked, and the cover 1 from being damaged due to the weight of snow. Furthermore, when the solar cell module 6 is installed on the surface of the inclined upper surface plate 2, when the cover 1 is installed in a predetermined direction, the incident angle of sunlight with respect to the solar cell module 6 is increased, and the power generation efficiency is improved. To do. The specific inclination angle θ ₁ of the upper surface plate 2 is preferably greater than 0 ° and 30 ° or less, more preferably 10 to 30 °, and particularly preferably 30 °. If the inclination angle theta ₁ of the upper plate 2 is in such a range, the snow or the like is less likely to remain on the solar cell module 6, the ideal angle of incidence at now sunlight enters the solar cell module 6 High power generation efficiency can be obtained.

  Moreover, the cover used to cover the upper part of the sewerage facility is usually made of glass fiber reinforced resin (FRP), and the surface deteriorated by ultraviolet rays etc. is repainted at a rate of about once every ten years. However, if the solar cell module 6 is installed like the cover 1 according to the present invention, the portion covered with the solar cell module 6 does not need to be repainted. The paint area at the time decreases, and the burden of repair work is reduced.

  The back plate 3 is formed so as to extend downward from the upper end of the top plate 2. Here, “downward” includes not only the vertical direction but also diagonally downward. The cover used to cover the upper part of the sewerage facility is used in the state of a cover assembly that is arranged adjacent to each other in the width direction. Usually, at least a part of the cover that constitutes the cover assembly includes An openable and closable inspection port is provided for inspecting the inside of the sewerage facility covered by the cover. As shown in FIGS. 13 and 14, the upper surface of the conventional cover 41 has a gentle arch shape or a horizontal flat surface, and an inspection port 42 is provided on the upper surface. The operator is in a difficult posture such as bending over the upper body (upper body) and looking into the lower part of the body, putting a strain on the body and falling into the water from the inspection port or putting it in the pocket of the jacket There was a risk that objects (cell phones, writing instruments, etc.) that had been dropped would fall and sink into the water when bent. In addition, the glasses of the worker may be clouded by the steam rising when the opening / closing door 43 of the inspection port is opened. Furthermore, since the angle of the line of sight at the time of inspection is an angle perpendicular to the water surface, there is a problem that the range of the water surface that can be viewed from the inspection port is narrow and it is difficult to inspect the entire water surface.

Since the cover 1 according to the present invention has the back plate 3 extending downward from the upper end of the top plate 2 as described above, the back plate 3 can be opened and closed by the door 12 as shown in FIG. If the mouth 11 is provided, it is possible for the worker to carry out the internal inspection work with a comfortable posture, and the thing that the worker himself or the worker has put in the jacket pocket may fall into the water. Can be prevented. Further, since the operator does not look into the inspection port 11 from above, the glasses of the operator are not fogged by the steam rising from the inspection port 11 when the door 12 is opened. Furthermore, since the angle of the line of sight at the time of inspection is shallow with respect to the water surface, the range of the water surface that can be viewed from the inspection port 11 is widened, and inspection over the entire water surface is facilitated. The angle θ ₂ formed by the outer surface of the back plate 3 and the horizontal surface is preferably 90 to 150 °, and more preferably 120 to 135 °. If theta ₂ is such a range, in the case of providing the access port, the effect can be easily obtained.

  In the cover according to the present invention, as shown in FIG. 4, the inspection port 13 that can be opened and closed by the open / close door 14 for inspecting the inside of the cover is not only the back plate 3 but also the solar cell module of the top plate 2. 6 can be additionally provided in a portion where 6 is not installed. As shown in FIG. 5, when a plurality of sewer facilities 30 and 31 are arranged in parallel at relatively short intervals, and the directions of the cover 1 covering the upper portions of these facilities sewers 30 and 31 are all the same, When the inspection port 11 is provided only on the back plate, the inspection port 11 is provided only on either the left or right side of the passage 32 between the sewer facilities 30 and 31, so that the operator who performs the inspection has the arrow 33 in FIG. It is necessary to inspect the whole while moving a long distance with the travel route shown in. On the other hand, as shown in FIG. 7, when the inspection port 13 is provided not only on the back plate of the cover but also on the upper surface plate, the inspection ports 11 on both the left and right sides of the passage 32 between the sewer facilities 30 and 31, 13, it is possible to inspect the inside of the cover on the left and right sides sandwiching the passage 32 at substantially the same position, and the entire inspection work can be performed with a short movement distance by the movement route indicated by the arrow 34. Note that such inspection ports do not need to be provided on all cover covers that are arranged adjacent to each other. Normally, cover covers with inspection ports are arranged at a ratio of about one to several sheets. It only has to be.

  The side plate 4 is a member that connects between the side end portions of the top plate 2 and the back plate 3, and the inside of the cover 1 is surrounded by the top plate 2, the back plate 3, and the two side plates 4, An internal space 7 having a lower opening is formed. And, as the most important feature of the cover according to the present invention, an internal space 7 for guiding odor gas generated from the on-site treated water accommodated in the sewerage facility to the outside of the cover 1 in at least one of the two side plates. A deodorizing duct 5 leading to is provided. It should be noted that a flange 8 for fixing a cover to the edge of a sewerage facility for storing in-process treated water or fixing between adjacent cover covers at the lower ends of the top plate 2, the back plate 3 and the side plate 4. Is preferably formed.

  As described above, conventionally, the deodorizing duct protrudes upward from the central portion of the cover, further extends in a horizontal direction from a predetermined height (near 3 to 5 m above the cover), passes over the cover, and deodorizers Part of the solar cell module installed on the upper surface of the cover was shaded by the deodorizing duct, leading to a decrease in power generation efficiency. However, in the cover 1 according to the present invention, the deodorizing duct 5 is on the side. As shown in FIG. 11, when a plurality of cover covers 1 are arranged adjacent to each other in the width direction to form a cover cover assembly, the deodorizing duct 5 of another adjacent cover cover 1 and the horizontal direction are provided. Therefore, the solar cell module 6 cannot be shaded by the deodorizing duct, and the power generation efficiency is improved.

  Moreover, since it is not necessary to raise the deodorizing duct to the vicinity of 3 to 5 m above the cover as in the prior art, it is not necessary to construct a support (support) for supporting the deodorizing duct above the cover. As well as reducing, the landscape of the treatment plant will also improve. Furthermore, since it is not necessary to pull up the deodorizing duct as described above, the length of the deodorizing duct can be shortened.

  Further, since the deodorizing duct 5 communicates with the internal space 7 of each cover 1, the odor gas can be sucked in each cover 1, and all of the sewerage facilities covered by the plurality of covers 1. It is possible to perform uniform deodorization with no bias at the position. Furthermore, since the odor duct 5 is not above the cover 1 but at a low position near the passage of the side surface of the cover 1, an odor sampling port for collecting odor gas in order to measure the odor of the odor gas generated from the on-site treated water 18 and by providing the odor duct 5 with a valve for draining water to remove the water accumulated in the deodorization duct, the operator can perform maintenance and management such as odor measurement and drainage work of the odor duct. Can be carried out easily and safely without going to the center of the cover or climbing to a high place.

  Further, conventionally, the cover and the duct are individual structures, and it has been necessary to manufacture and install them for each. However, in the cover 1 according to the present invention, the deodorizing duct 5 is provided on the cover 1. Since it is a part and can be integrally formed, the manufacturing cost of the cover including the deodorizing duct can be reduced, and the construction period for installation in the sewerage facility can be shortened.

  In the cover according to the present invention, as shown in FIG. 8, the solar cell module is partitioned from the other part of the internal space 7 in the internal space 7 surrounded by the top plate 2, the back plate 3 and the side plate 4. It is preferable that a wiring accommodating chamber 17 for accommodating six wirings is provided. Thus, if the wiring of the solar cell module 6 is accommodated in the wiring accommodating chamber 17 partitioned from the other part of the internal space 7, the odor gas generated from the on-site treated water is a corrosive gas. However, the wiring can be shielded from corrosive gas to prevent the wiring from being deteriorated by corrosion.

  In the case where such a wiring accommodation chamber 17 is provided, the back plate 3 is provided with an inspection port 15 that can be opened and closed by an opening / closing door 16 that leads from the outside of the cover 1 to the inside of the wiring accommodation chamber 17. It is preferable that maintenance and inspection of the internal wiring and wiring connection work can be easily performed.

  Moreover, in the cover which concerns on this invention, as shown in FIG. 8, it is preferable that the LED illumination 20 is provided in the internal space 7 enclosed by the upper surface board 2, the back surface board 3, and the side surface board 4. As shown in FIG. Since the inside of the sewerage facility covered by the cover is dark, when inspecting the interior from the inspection port, it is usually necessary to illuminate the interior with a flashlight or the like. As a result, the inside of the cover 1 is brightly illuminated, so that visibility is improved and the operator does not have to carry a flashlight for inspection. As the power supplied to the LED illumination 20, the power generated by the solar cell module 6 installed on the cover 1 can be used. LED lighting consumes little power, and since it only needs to be turned off except during inspection, it consumes most of the power generated by the solar cell module, like the exhaust fan in the cited reference 2. In other words, the effective use of the electric power for other purposes (uses other than maintaining the function of the cover) is not greatly limited.

  Furthermore, in the cover according to the present invention, as shown in FIG. 9, it is preferable that a sprinkling port 19 for spraying the in-house treated water of the sewerage facility is provided on the upper surface plate. In general, since the power generation efficiency of solar cell modules decreases as the temperature rises, in-situ treated water sucked up by a pump or the like (water temperature is about 15 to 20 ° C. throughout the year) is sprayed from the sprinkling port 19 at high temperatures in summer. And if the solar cell module 6 is cooled and temperature rise is suppressed, the fall of power generation efficiency can be suppressed.

  FIG. 10 is an explanatory view showing an example of an embodiment of a deodorizing duct in the cover according to the present invention. The deodorizing duct 5 in this example is a pipe-like thing penetrating the two side plates 4 constituting the cover, and an opening 21 leading to the internal space 7 of the cover 1 is formed on a part of the side surface. . It is preferable that the opening 21 is provided with an opening area adjusting means for finely adjusting the opening area in order to equalize the odor gas in each cover. In the example of FIG. 10, a slidable door 23 is provided in the opening 21 as the opening area adjusting means, and the opening area of the opening 21 can be adjusted by sliding the door 23 in the arrow direction. it can. The door 23 is integrally provided with an adjustment knob 23 protruding in the radial direction of the odor duct 5 so that the adjustment can be easily performed. The opening area of the opening 21 is adjusted by, for example, inserting a jig that can hold the adjustment knob 23 from an inspection port provided on the back plate into the internal space, and holding the adjustment knob 23 with the jig to open the door. This is done by sliding 22.

  The material of the cover according to the present invention is not particularly limited, but is preferably lightweight from the viewpoint of facilitating installation work, for example, glass fiber reinforced resin (FRP) or the like as a suitable material. It is done.

  As shown in FIG. 11, the cover assembly according to the present invention includes a plurality of cover covers 1 according to the present invention that have been described so far, and a plurality of cover covers 1 that are adjacent to each other in the width direction. The various effects obtained by the cover 1 according to the present invention can be obtained.

  When a cover assembly is configured by arranging a plurality of cover covers provided with solar cell modules adjacent to each other, the cover covers are disposed between adjacent cover covers for collecting power generated by each solar cell module. It is normal that the solar cell modules installed in are electrically connected by a cable. In the cover lid assembly according to the present invention, in order to prevent the cable from being deteriorated at an early stage by being exposed to corrosive gas generated from the in-site treated water or outside air, each cover is provided with a wiring accommodation chamber as described above. As shown in the rear view of FIG. 12, the wiring housing chambers of adjacent cover lids 1 are connected by a solar cell module connection pipe 25, and the cable is connected through the inside of the solar cell module connection pipe 25. It is preferable to do so.

  In the method of using the cover according to the present invention, the lower cover (lower end side) of the cover according to the present invention described above is in the direction from southeast to south to southwest, preferably south. Are arranged and used. If the cover with the solar cell module installed on the surface of the inclined upper surface plate is arranged in such a direction, the incident angle of sunlight with respect to the solar cell module is increased, and high power generation efficiency is obtained. In the cover used for this method of use, the inclination angle of the top plate is preferably greater than 0 ° and 30 ° or less, more preferably 10 to 30 °, and particularly preferably 30 °. If the inclination angle is in such a range, sunlight enters the solar cell module at an ideal incident angle, and higher power generation efficiency can be obtained.

  EXAMPLES Hereinafter, although this invention is demonstrated further in detail based on an Example, this invention is not limited to these Examples.

(Power generation simulation)
As shown in FIG. 11, a plurality of covers according to the present invention are arranged adjacent to each other to form a cover assembly, and the lower side of the slope on the top plate of each cover is the installation direction shown in Table 1, and the top plate of each cover is inclined. The annual power generation amount of the solar cell module when the angle is the value shown in the table was calculated under the following calculation conditions, and the calculation results are shown in the table.

[Calculation conditions]
・ Installation location: Tokyo ・ Installation capacity: 1040W (130W × 8)
Module temperature coefficient: -0.5% / ° C
・ Inverter efficiency: 92%

  As shown in Table 1, when the inclination angle of the top plate is the same (except in the case of 0 °), the lower side of the inclination on the top plate of the cover is directed from southeast to south to southwest, particularly southward. When installed, the annual power generation is higher than when installed in other directions. In addition, the inclination angle of the top plate increases up to about 30 ° as the inclination angle increases, and the annual power generation increases, but if it exceeds that, it tends to decrease.

  INDUSTRIAL APPLICATION This invention can be utilized suitably as a cover for covering the upper part of a sewerage facility, and its usage method.

It is a perspective view which shows an example of embodiment of the cover which concerns on this invention. It is a side view which shows an example of embodiment of the cover which concerns on this invention. It is sectional drawing cut | disconnected along the longitudinal direction of the cover which shows an example of embodiment of the cover which concerns on this invention. It is sectional drawing cut | disconnected along the longitudinal direction of the cover which shows embodiment of the cover with which the inspection port was provided also in the upper surface plate in addition to the back plate. It is a top view showing the state where a plurality of sewer facilities are arranged in parallel. It is a top view which shows the movement route at the time of the inspection work in case the inspection port is provided only in the back plate of the cover. It is a top view which shows the movement route at the time of the inspection operation in case the inspection port is provided also in the upper surface plate in addition to the back plate of the cover. It is sectional drawing which cut | disconnected along the longitudinal direction of the cover which shows embodiment of the cover provided with the wiring storage chamber in the upper part of internal space. It is a perspective view which shows embodiment of the cover which provided the water sprinkle in the upper surface board. It is explanatory drawing which shows an example of embodiment of the deodorizing duct in the cover which concerns on this invention. It is a perspective view which shows an example of embodiment of the cover cover aggregate | assembly which concerns on this invention. It is a rear view which shows an example of embodiment of the cover cover aggregate | assembly which concerns on this invention. It is sectional drawing which shows arrangement | positioning of the inspection port in the conventional cover. It is sectional drawing which shows arrangement | positioning of the inspection port in the conventional cover.

Explanation of symbols

1: cover lid, 2: top plate, 3: back plate, 4: side plate, 5: deodorizing duct, 6: solar cell module, 7: internal space, 8: flange, 11: inspection port, 12: open / close door, 13 : Inspection port, 14: Opening / closing door, 15: Inspection port, 16: Opening / closing door, 17: Wiring storage chamber, 18: Odor sampling port, 19: Sprinkling port, 20: LED lighting, 21: Opening, 22: Door, 23: Adjustment knob, 25: Solar cell module connection piping, 30: Sewerage facility, 31: Sewerage facility, 32: Aisle, 33: Arrow, 34: Arrow, 41: Cover, 42: Inspection port, 43: Opening / closing door

Claims (13)

A cover for covering the upper part of the sewerage facility,
A top plate that is inclined at a predetermined angle in the length direction of the cover and on which the solar cell module is installed, a back plate that extends downward from the upper end of the top plate, and a side of the top plate and the back plate Two side plates connecting between the end portions,
Inside the cover, an inner space surrounded by the top plate, the back plate and the side plate is opened at the bottom,
A sewerage facility in which at least one of the two side plates is provided with a deodorizing duct leading to the internal space for guiding odorous gas generated from the on-site treated water contained in the sewerage facility to the outside of the cover. Cover lid.   The cover according to claim 1, wherein the back plate is provided with an openable / closable inspection port for inspecting the inside of the cover.   The cover according to claim 2, wherein the upper surface plate is provided with an openable / closable inspection port for inspecting the inside of the cover.   The cover according to any one of claims 1 to 3, wherein an inclination angle of the upper surface plate is greater than 0 ° and not greater than 30 °.   The cover according to any one of claims 1 to 4, wherein an angle formed by an outer surface of the back plate and a horizontal surface is 90 to 150 °.   The cover as described in any one of Claims 1-5 in which the wiring accommodating chamber for accommodating the wiring of the said solar cell module partitioned off from the other part of the said internal space was provided in the said internal space.   The cover according to claim 6, wherein the back plate is provided with an openable and closable inspection port that communicates from the outside of the cover to the wiring housing chamber.   The cover according to any one of claims 1 to 7, wherein LED lighting is provided in the internal space.   The cover according to any one of claims 1 to 8, wherein the deodorization duct is provided with an odor sampling port for collecting odor gas generated from the on-site treated water accommodated in the sewerage facility.   The cover as described in any one of Claims 1-9 in which the water spout for spraying the in-process treated water of the said sewer facility was provided in the upper part of the said upper surface board.   The cover as described in any one of Claims 1-10 in which the opening area adjustment means for adjusting the opening area of the opening part which leads to the said interior space was provided in the side surface of the said deodorizing duct.   A cover assembly in which a plurality of cover covers according to any one of claims 1 to 11 are arranged adjacent to each other in the width direction, and the deodorizing ducts of adjacent cover covers are connected to each other.   The usage method of the cover which arrange | positions and uses the cover as described in any one of Claims 1-11 so that the lower side of the inclination in the said upper surface board of the said cover may become the direction of southeast-south-southwest.

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