JPH081028Y2 - Deodorant lid for sewage treatment pond - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a deodorizing lid for a wastewater treatment pond.

<Prior Art> In a sewage treatment pond, for example, a sedimentation pond or an aeration pond in a sewage treatment plant, a foul-smelling gas is generated, so it is necessary to prevent deodorization with an airtight lid. Thus, conventionally, as shown in FIG. 4B (section bb in FIG. 4A),
A lid piece A (beams are fixed to the back surface of the face plate on all four sides) and a lid piece B (seal plates 3 ', 3'fixed on the back surfaces of both sides of the lid piece A are fixed, and a flat plate is formed on the upper surface of the seal plate 2'. (The packing 2'is attached) are alternately arranged to seal between the lid pieces A and B with the packing 2 ', while the seal between the pond and the lid piece is, for example, As shown in Fig. 4C (CC cross-sectional view of Fig. 4A), a receiving frame 4'is fixed to the pond edge, and a flat packing 41 'is attached to the receiving frame 4', and a lid piece is placed on the receiving frame 4 '. The beam 11 'is mounted.

<Problems to be Solved> However, in such a deodorant lid, when the lid piece A or B is strained and deformed due to thermal expansion and contraction due to a load or temperature change, a gap is formed between the packing 2 ′ and the lid piece A. It easily occurs, and it is difficult to satisfactorily deodorize under such a gap. Further, the sealing plate 3'of the lid piece B is attached in an inclined state, or the lid piece B warps due to a change in temperature, so that the upper surface level of the lid piece A is higher than the upper surface level of the lid piece B. When it gets higher, the pond edge of the lid piece A floats up, and odor leakage from the edge pond and the lid cannot be avoided.

An object of the present invention is to provide a deodorizing lid for a wastewater treatment pond that can maintain a good deodorizing effect even if the lid piece is distorted or deformed, or the upper surface levels of the lid piece A and the lid piece B do not match. It is in.

<Means for Solving the Problem> The lid pieces are placed in parallel on the wastewater treatment pond according to the present invention, and the packing is projected from the edge end on the back surface side of one edge end of the adjacent lid pieces. It is attached, and the projecting portion of the packing is pressed against the back surface of the other edge of the lid piece and the side surface of the slag against the bending reaction force of the packing.

<Operation> Even if the lid pieces are distorted and deformed and the upper surface levels of the adjacent lid pieces do not coincide with each other due to such a configuration, the packing is flexibly deformed following the deformation while keeping contact with the side surface of the cake. The pressed state is maintained.

<Description of Embodiments> An embodiment of the present invention will be described below with reference to the drawings.

1A is a partially cutaway perspective view showing an embodiment of the present invention, and FIG. 1B is a sectional view taken along line bb in FIG. 1A.

In FIGS. 1A and 1B, A, ... And B are lid pieces, and beams 11, 11 and 12, 12 are provided on four sides of the back surface of the face plate 1 (the beams 12, 12 are the entire width of the face plate 1). Auxiliary beams 13 and 13 are provided in the middle of these beams. For these lid pieces, wood or FRP material, for example, thermosetting resin foam (hard urethane resin) reinforced with long glass fibers can be used. 2 and 2 are packings attached to the back surfaces of both side portions of the lid piece B, and have a seal portion 21 protruding from the edge of the face plate 1, and as shown in FIG. The uppermost portion of the seal portion is located above the level of the back surface of the face plate by ΔH. The lid piece B and the face plate back surface of the lid piece A are at the same level, and the packing 2 is bent by the amount of ΔH described above, and the upper surface of the seal portion 21 is brought to the back surface of the face plate edge portion 10 of the lid piece A. Being touched. Therefore, a pressure against the bending reaction force acts on the contact surface. Further, the length of the packing 2 is set to be slightly longer than the distance between the beams 11 of the lid piece A and the lid piece B, and the tip of the sealing portion 21 of the packing 2 is set to the lid piece B.
It is pressed against the rice cake side surface 110. By doing so, the seal portion 21 of the packing 2 can be brought into contact with the side surface of the beam as well as the back surface of the face plate of the lid piece A, and the sealing performance can be increased.

In the above, when attaching the packing 2 to the lid piece B,
For example, as shown in FIG. 1B, a holding plate 3 having a holding fixing portion 22 on the packing 2 and a horizontal bearing portion 31 at the upper end.
It is possible to use a method of fixing the packing presser fixing portion 22 to the beam 11 with a wood screw or the like (not shown) by (made of metal or plastic). The horizontal support portion 31 of the holding plate 3 increases the bending reaction force (resistance to bending deformation in the direction of the seal portion) of the seal portion 21 of the packing 2 to make contact between the lid piece A and the packing seal portion 2. It is effective to increase the surface pressure. As shown in FIG. 2A, if the packing 2 is locked to the horizontal support portion 31 of the holding plate 3, the bending reaction force of the packing seal portion can be further increased, It is possible to further increase the contact surface pressure.

As shown in FIG. 2B, the root portion 23 of the packing 21 may be made thick, and the thick portion 23 may be held by the horizontal portion 31 at the upper end of the holding plate.

As the material of the packing, a corrosion-resistant soft material or a material softened by foaming is used, and rubber is usually used.

The shape of the seal portion 21 of the packing 2 may be a circle as shown in FIG. 2C or a circle with a protrusion as shown in FIG. 2D. In these cases as well, the contact surface pressure described above is generated. In order to do this, the uppermost part of the sealing part is made higher than the level of the back surface of the face plate of the lid piece (usually 2 to 6 mm), and the width width of the packing is made sufficient so that the tip of the sealing part can contact the beam side surface of the lid piece A. It's long.

In FIG. 1A, the beams 12 and 1 at both ends of the lid pieces A and B are shown.
The reference numeral 2 extends over the entire width of the face plate, and in order to seal between the lid pieces A and B and the pond edge e, for example, as shown in FIG. The flat packing 41 can be attached to the plate 4, and the beam 12 can be placed on the packing 41.

In this case, the above-mentioned packing 2 for sealing between lid pieces is
Usually, the lid piece B shown in FIG. 1A is attached to the area f between the beams 12, 12, but as shown in FIG. 3B or FIG. The packing 2 for sealing between the lid pieces and the pressing plate 3 can be passed through the notch 120 to attach the packing over the entire length of the lid piece B.

The deodorizing lid for sewage treatment pond according to the present invention is configured as described above, and packing is attached to the back surface of the edge of the lid B so that the packing protrudes from the edge and the back of the edge of the lid A is attached. Side and the side surface of the packing are elastically contacted with the projecting portion of the packing against the bending reaction force of the packing, and even if the lid pieces A and B are subjected to strain deformation, the bending of the packing is elastic to the deformation of the lid piece. Therefore, the contact between the packing and the back surface of the edge of the lid piece A and the side surface of the lees can be well maintained, and the seal between the lid pieces A and B can be well retained. Further, even if the lid piece B is warped and deformed, the packing material between the lid piece B and the lid piece A is bent, so that the lid piece A can be prevented from rising due to the warped deformation of the lid piece B. It is possible to prevent the floating of A from the pond edge, maintain a good seal against the pond edge, and cover piece B
Also in the case of (1), regardless of the warp deformation, the seal with the pond edge can be well maintained, and therefore the seal with the pond edge of the entire lid can be well retained.

[Brief description of drawings]

FIG. 1A is a partially cutaway perspective view showing an embodiment of the present invention,
1B is a sectional view taken along line bb in FIG. 1A, FIGS. 2A, 2B, 2C and 2D are explanatory views showing packing used in the present invention, and FIG. 3A. Is the first
III-III sectional view in FIG. A, FIG. 3B and FIG. 3C
4A and 4B are explanatory views showing the attachment state of packing at one end of the lid in the present invention, FIG. 4A is a top view explanatory view showing a conventional example, and FIGS. 4B and 4C are bb in FIG. 4A. It is a sectional view and CC sectional view. A, B ... Lid piece, 2 ... Packing, 21 ... Packing seal part (protruding part).

Claims (1)

[Scope of utility model registration request] 1. A lid piece is placed in parallel on a sewage treatment pond, and packing is attached to one edge end back surface of one of the lid pieces adjacent to each other so as to project from the edge, and the packing is attached. The deodorizing lid for a wastewater treatment pond is characterized in that the protruding portion is pressed against the back surface and the side surface of the other edge of the lid piece against the bending reaction force of the packing.