JPH0433996Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is installed in a sewage treatment tank with a large opening, such as a sewage thickening tank or a sludge tank installed in a sewage treatment plant. The present invention relates to a deodorizing structure for a sewage treatment tank having a cover that can be opened and closed to prevent the diffusion of foul-smelling gas from the tank.

(Prior art) Regarding sewage treatment, the odor has traditionally been a problem, so it is necessary to install it indoors and pass the odor through a deodorizer.
Air fresheners were used to prevent odors from spreading directly outdoors.

Therefore, the present applicant et al. has developed a system that not only confines the odor generated from inside the sewage treatment tank within the tank, but also allows the top of the tank to be easily opened as needed.It is lightweight, has a simple structure, and can be opened and closed smoothly. He devised an inexpensive cover that could be opened and closed, and it was published in 1983.
No. 23737.

This will be briefly explained with reference to FIGS. 8 and 9. This openable and closable cover is a cover in which a covering sheet d is attached to the entire lower surface of the cover skeleton c which can be expanded and contracted, and the opening of the sewage treatment tank f is covered by the covering sheet d. That is, a plurality of supports g1... are arranged at intervals along both sides of the tank f, and a steel rail g is placed on top of them via long pillow members g2... having a U-shaped cross section.
is laid, and the cover skeleton c...rollers e, e at both ends
is placed on steel rails g, g so that the curtain d1 around the covering sheet d hangs down along the inner surface of the frame of the tank f, so that the entire opening of the tank f is covered. In addition,
b is an X-shaped connecting rod, and this opening/closing leg serves to move each cover skeleton c... in parallel along the rail g. The cover attached to cover the entire opening of the tank f in this way can be easily opened and closed by directly expanding and contracting the cover skeleton c by hand. In addition, a winch or the like is further provided with a wire for opening/closing operation around the processing tank f, and by operating the winch, the cover skeleton c... is expanded or contracted to open or close the cover.

(Problems to be Solved by the Invention) In this way, we have provided a cover that can be opened and closed to cover the entire opening of the processing tank, but the seal is still incomplete at the flap part d1 around the covering sheet It was discovered that a small amount of odor gas leaked out of the tank, and since the cover sheet was bent and could not be completely aligned with the tank wall due to the bellows type, gas leaked from that part, and this was ignored. I got to the point where I couldn't do anything.

In order to solve these problems, this invention was devised to completely contain the foul-smelling gas emitted from the inside of a tank such as a sewage treatment tank.
It is an object of the present invention to provide a deodorizing structure for a sewage treatment tank that allows the top of the treatment tank to be easily opened as needed.

(Means for Solving the Problems) The structure of the present invention for achieving the above object will be explained based on the attached embodiment drawings.

FIG. 1 is an overall vertical cross-sectional view of a basic embodiment of the present invention, FIG. 2 is an enlarged perspective view of the line in FIG. 1, and FIGS. 3 and 4 are cross-sectional views of different embodiments. Figures and perspective views, FIG. 5 is a sectional view of yet another embodiment,
FIG. 6 is an overall sectional view of yet another embodiment.
The figure is an enlarged view of the lined part in FIG. 6.

That is, the deodorizing structure of the sewage treatment tank of the present invention includes a plurality of movable cover skeletons 2 that run through the opening of the sewage tank 1...a connecting rod 3 that connects them telescopically,
The cover frame 2 covers the opening of the sewage tank 1...
In the deodorizing structure of the sewage treatment tank comprising a flexible covering sheet 4 stretched over the lower surface of the sewage tank 1,
A gutter-shaped seal water tank 5 is provided in the frame 11 of the apparatus, and the edge part 41 of the covering sheet 4 is submerged in the gutter-type seal water tank 5.

The cover frame 2 includes, for example, a pair of rails 23, 2 installed along the longitudinal sides of the sewage tank 1.
3, and are connected to each other by a connecting rod 3 so as to be expandable and contractible.

(Operation of the invention) According to this invention having the above-mentioned characteristic structure, the plurality of movable cover skeletons 2...the connecting rods 3 connected to each other can expand and contract the gap between each movable cover skeleton 2. Because these movable cover skeletons 2 are installed as shown in FIG. The stretched flexible covering sheet 4 expands and contracts to surround the sewage tank 1 in an openable and closable manner. Furthermore, since the edge portion 41 of the covering sheet 4 is submerged in the water of the gutter-type seal tank 5 provided on the frame 11 of the sewage tank 1, the opening of the sewage tank 1 is completely sealed with water. This maintains the odor-proof condition.

(Example) Hereinafter, an example of this invention will be described in detail based on the drawings.

(Example 1) In FIGS. 1 and 2, the rail 23,
On 23, a plurality of movable cover skeletons 2... are arranged in parallel along the longitudinal direction and run.

The movable cover frame 2 includes columns 21 and beams 2 made of steel.
2, and the rail 2 is arranged into an approximately ∩ shape.
3 and 23 so as to be freely movable via guide rollers 25, and a flexible covering sheet 4 is suspended from the side of the beam body 22, and the side hanging portion 40 is guided into the gutter-type seal water tank 5. The peripheral portion 41 of the water tank 5 is designed to be properly submerged in the gutter-shaped seal water tank 5.

Beam bodies 22 of each adjacent movable cover skeleton 2...
On the top surface, a connecting rod 3 is arranged, which is a pair of steel members pivoted in an X shape at the center and connecting a plurality of them, and the cover frame 2 is expanded and contracted by the opening and closing legs of the connecting rod 3. .

Then, as the movable cover skeleton 2 moves, the connecting rod 3 opens and closes, and the interval between the movable cover skeletons 2 changes, thereby causing the covering sheet stretched over the movable cover skeleton 2. 4 is extended or folded, and the opening of the sewage tank 1 is opened and closed.
The edge portion 41 of the covering sheet 4 is submerged in water of a gutter-type seal water tank 5 provided on the side wall frame 11 of the sewage tank 1. This submerged position is spaced apart from the side wall of the frame 11 in consideration of the folded width of the covering sheet 4, and is located inside the center of the gutter-shaped seal water tank 5. The covering sheet 4 is preferably flexible and non-breathable, and in this embodiment, a tent canvas was used in consideration of its strength. Note that the covering sheet 4 is not limited to canvas, and materials with good weather resistance such as polypropylene sheets and vinyl chloride sheets may be used.

Beam bodies 2 of each pair of adjacent movable cover skeletons 2...
2, the tensioning wire material 26... is attached to the mounting bracket 2.
61..., and the tensioning linear bodies 26... are inserted into and fixed to the attachment rings 262... attached to the upper surface of the cover sheet 4, and the cover sheet 4 is attached to each movable cover frame. 2... is stretched on the lower inside. For this reason, each movable cover frame 2... is always located outside the cover sheet 4, and does not come into contact with the gas generated from the sewage tank 1, so that each movable cover frame 2... is not corroded by odor gas. There is. Also, on the side wall of the frame 11 of the sewage tank 1, approximately L
A mold member is formed at the same time as the frame 11, and the side wall and L
A gutter-type seal water tank 5 is formed by the mold member over the entire length of the side wall and is filled with water. The edge portion 41 of the covering sheet 4 hangs down from the side of the beam body 22 and is submerged in the gutter-type seal water tank 5.

In this way, the flexible covering sheet 4 is opened and closed in a bellows manner to surround the sewage tank 1 while submerging its edge 41 in the seal water tank 5 as each movable cover frame 2 expands and contracts. Therefore, when the cover is closed, the tank is completely airtight and the odor inside the sewage tank 1 is prevented from leaking to the outside. In particular, since the covering sheet 4 is of a bellows type, its edge 41 is suspended apart from the side wall of the frame 11, and even if a gap is formed between the cover sheet 4 and the side wall, it is completely blocked by a water seal.

In addition, when the opening of the sewage tank 1 is long and the moving distance of the movable cover frame 2 at the cover end on the rail 23 is large, the movable cover may be divided into a plurality of blocks and installed. Furthermore, it is also possible to integrate the seal water tank 5 with the frame 11. In this case, it is necessary to ensure that no gap exists between the seal water tank 5 and the side wall.

(Example 2) FIGS. 3 and 4 show the side wall frame 11 of the sewage tank 1.
A receiving metal fitting 6... is provided separately on the inner surface, and this receiving metal fitting 6...
An example is shown in which a double gutter type square sealed water tank (made of synthetic resin or metal) 5 is constructed and held. The receiving brackets 6 are fixedly attached to T-shaped mounting brackets 61, and the brackets 61 are riveted to the wall surface of the frame 11 via anchor bolts 62 at the site. will be established. In the first embodiment, the seal water tank 5 is attached to the frame 1.
1, it is difficult to apply it to an existing sewage tank and at the same time it is difficult to form a seal water tank 5, but this is possible in this embodiment. However, when the seal water tank 5 is held by the spaced apart receiving fittings 6 as shown in the figure, it is inevitable that a gap will occur between the receiving fittings 6 and the surface of the water tank 5 and the frame 11. Therefore, in this embodiment, the auxiliary sealing canvas 7 is suspended from the upper surface of the frame 11, its lower end is submerged in the water tank 5, and it is adhered to the side wall of the water tank 5 with a suitable adhesive. Therefore, the covering sheet 4 and this auxiliary canvas 7 completely block out the bad odor coming from the sewage tank 1. And this auxiliary canvas 7
Since it completely covers the upper surface of the frame 11 to the water tank 5, even if the cover sheet 4 swings, it will not directly touch the frame 11, and there will be no damage caused by the cover sheet 4 rubbing against the concrete surface. It also has the function of being prevented. Reference numeral 71 is an anchor bolt for fixing the canvas 7 to the upper surface of the frame 11. Further, reference numeral 42 designates a chain-like weight that is sewn on the edge portion 41 of the covering sheet 4 and housed therein. The weight 42 functions to allow the edge portion 41 to fold in a zigzag shape and to allow the edge portion 41 to be submerged in the water tank 5 at all times without being stirred. It is not excluded that the weights may be suspended at intervals. Incidentally, a weight may be similarly provided at the lower end of the auxiliary canvas 7 to omit adhesion.

(Embodiment 3) FIG. 5 shows an example of application where the upper side of the side wall frame 11 of the sewage tank 1 protrudes inward, and an arm-shaped bracket 6 is attached to the inclined wall surface of the frame 11.
A receiving metal fitting 6 similar to that described above is provided at a distance via the receiving metal fitting 3, and the two gutter-type seal water tanks 5 are constructed and held by this receiving metal fitting 6. Reference numeral 64 is the bracket 63
This is an anchor bolt for riveting and fixing to the frame 11. In this case as well, it is inevitable that a gap will be created between the water tank 5 and the main body 11, so the auxiliary sealing canvas 7 is suspended from the upper surface of the main body 11, and its lower end is submerged in the water tank 5 and bonded. There is. In addition, since the auxiliary canvas 7 and the covering sheet 4 tend to come close to each other due to the structure of the frame 11, a through horizontal pipe 72 is attached to the lower part of the auxiliary canvas 7 to prevent them from interfering with each other.
2 is fixedly installed so that the lower part of the auxiliary canvas 7 is constantly moved toward the frame 11 side. Furthermore, in the case of this embodiment, as mentioned above, due to the structure of the frame 11, the water tank 5 enters halfway into the lower part of the frame 11, so the covering sheet 4 approaches the frame 11, causing the covering sheet 4 to retract. When opened, the folded edge comes into contact with the frame 11 more easily than in the above embodiment, as shown by the dashed line in the figure. Therefore, the skeleton 1
Auxiliary campus 7 extends from the top of 1 to the water tank 5.
As described above, since the covering sheet 4 is covered with a thin film, it is possible to prevent the covering sheet 4 from becoming scratched and damaged, and in this embodiment, such a function of the auxiliary campus 7 is noteworthy. Since the other configurations are the same as those in the first and second embodiments, common parts are given the same reference numerals and detailed explanation thereof will be omitted.

(Example 4) Figures 6 and 7 show an intermediate overflow weir frame 1 in the tank.
2 shows an example of application in a large-scale sewage tank 1 having... In this case, a cover skeleton 2..., which is movable along the longitudinal direction as described above, is constructed for each area divided by the surrounding frame 11 and weir frame 12..., and each cover frame 2... A covering sheet 4... is stretched over the lower surface of. Peripheral frame 11
A seal water tank 5 similar to the above is arranged on the inner surface of the tank.
On the other hand, on the upper surface of the weir frame 12... there are pillars 8 spaced apart.
1..., a pedestal 8... is constructed that protrudes from the water surface, and a seal water tank 5... is attached to the side of this pedestal 8...
are arranged, and the edge portion 41... of each covering sheet 4...
... are submerged in these seal water tanks 5. The top surface of the pedestal 8 is equipped with a checker plate 82 so that people can walk on it and pumps can be installed.
A canvas 83 is stretched between the side supports, and a lid 84 is attached between the lower end of the canvas 83 and the seal water tank 5, and the checker plate 82, canvas 83 and lid 84 and the covering sheet 4 completely block the leakage of bad odors from each partitioned area of the sewage tank 1. also,
On the top surface of the pedestal 8... is a rail support column 85...
are installed separately, a rail 23... is installed on the support column 85..., and a cover frame 2... is installed on this rail 23...
is movably supported via rollers 25.

(Effects of the invention) As described above, the deodorizing structure of the sewage treatment tank of the present invention is such that the edge of the covering sheet stretched over the cover frame is submerged in the gutter-shaped seal water tank attached to the sewage tank frame. Because of this, it is highly airtight and completely traps the odors generated from the treated water inside the sewage tank, preventing any bad odors from escaping outside the tank. In this way, the present invention has extremely great practical value in combination with the simple opening/closing structure of the cover.

[Brief explanation of the drawing]

Fig. 1 is an overall vertical sectional view of a basic embodiment of the present invention, Fig. 2 is an enlarged perspective view of the line in Fig. 1, and Figs. 3 and 4 are sectional views and perspective views of different embodiments, respectively. , FIG. 5 is a sectional view of yet another embodiment, FIG. 6 is an overall longitudinal sectional view of yet another embodiment, FIG. 7 is an enlarged view of the line in FIG. 6, and FIG. 8 is a conventional example. The vertical sectional view shown in FIG. 9 is a perspective view of the same cover skeleton. Explanation of symbols, 1...Sewage tank, 11...Structure, 2
... Cover skeleton, 3 ... Connecting rod, 4 ... Flexible covering sheet, 41 ... Edge portion, 5 ... Gutter-type seal water tank.

Claims (1)

[Scope of utility model registration request] A plurality of movable cover skeletons that run through the opening of the sewage tank, a connecting rod that telescopically connects the movable cover skeletons, and a connecting rod stretched over the lower surface of the cover skeleton so as to cover the opening of the sewage tank. A deodorizing structure for a sewage treatment tank comprising a flexible covering sheet, characterized in that a gutter-shaped seal tank is provided in the frame of the sewage tank, and the peripheral part of the covering sheet is submerged in the gutter-shaped seal tank. Odor-proof structure for sewage treatment tanks.