JP2004196339A - Cover structure of vertical tank opening - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cover structure of opening parts of supply and sewage water tanks with a small number of parts and easy execution at low cost. <P>SOLUTION: In the cover structure of opening parts of supply and sewage water tanks, L-shaped receiving frames are disposed on opening parts in a vertical wall of the supply and sewage water tanks or a plurality of opening parts formed in a floor surface to cover an upper part of the water tank, and a thermosetting resin plate is placed on/fitted to the L-shaped receiving frames. A thermosetting resin thin plate is disposed on face and back sides of the plate, and a honeycomb-like structure or a resin foam block is integrally disposed between the thin plates. A peripheral end part reinforcing resin foam body is integrally disposed on a peripheral end part of the plate, a placement part is formed on an edge part reinforcing resin foam by notching a lower portion thereof, and the placement part is fitted to/placed on the L-shaped receiving frame. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a cover structure for an opening of a water tank. The present invention relates to a cover structure in which a vertical wall opening of a clean water (purifying) tank, a sewer tank, or the like, or an opening of a floor covering the upper and lower water tanks is covered with a cover (cover).
[0002]
[Prior art]
Water supply (purification) facilities vary depending on the scale, but sand settling tanks (ponds), sedimentation tanks (ponds), mixing tanks (ponds), filtration tanks (ponds), water purification tanks (ponds), distribution tanks (ponds), etc. Is arranged. The openings of these various tanks are covered with lids for safety and hygiene purposes. Sewage treatment plants and human waste treatment plants vary depending on the scale, but sedimentation tanks (ponds), sewage adjustment tanks (ponds), activated sludge (aeration) tanks, biological reaction tanks, mixing tanks (ponds), filtration tanks (ponds) ), Terminal treatment tanks (ponds) and the like. These various tanks (ponds) may be of an open type or a closed type depending on the equipment scale, installation location, and the like. In the closed tank, the tank opening is covered with a cover from the viewpoints of safety, hygiene, environment and the like. Covers are installed on the vertical wall openings of the upper and lower water tanks, or, in the case of large water tanks, on the floor covering the upper part of the water tank, a plurality of openings provided at appropriate places for inspection and observation purposes. Depending on the size of the equipment, the installation location, the size of the opening, etc., a cover such as a flat type, an arch type, or a dome type is installed.
[0003]
When covering the opening of a concrete water tank (pond) with a cover, when constructing or after building a concrete tank, in the vertical wall opening of the water tank or large water tank, Notches (L-shaped support bases) are formed in a plurality of openings for inspection and observation provided on the floor covering the upper part of the aquarium so that the cross section cut at right angles to the longitudinal direction has an L-shape. A method is adopted in which an L-shaped receiving frame is arranged on the L-shaped support base, and an end of the cover is fitted to the L-shaped receiving frame portion. Conventionally, the thickness of the lid is changed according to the size of the upper opening of the water tank, and the height (H) and width (W) of the L-shaped receiving frame and the L-shaped receiving frame are changed according to the thickness of the lid. Was changing the height (H) and width (W).
[0004]
For example, according to the conventional method shown in FIG. 2, according to the size (area) of the upper opening of the upper and lower water tanks having different sizes, for example, when the area of the opening is larger, the thickness of the cover is 30 mm, 35 mm, It was necessary to prepare cover lids having different thicknesses of 50 mm and 75 mm, and prepare an L-shaped receiving frame having a size corresponding to the thickness of the cover lid. For this reason, the management of production, storage, transportation, construction, etc. of these various types of covers and various types of L-shaped receiving frames is not only complicated, but also has the disadvantage that the cost is high, and improvements are sought. Was.
[0005]
[Problems to be solved by the invention]
The present invention has been completed as a result of intensive studies in order to provide a fastener that has solved the above-mentioned drawbacks. That is, the objects of the present invention are as follows.
(1) To provide a cover structure that can reduce the number of parts.
(2) To provide a cover structure for the vertical wall opening of the upper and lower water tank or the opening provided on the upper floor of the upper and lower water tank, which is easy to construct.
(3) To provide a cover structure that does not increase the cost.
[0006]
[Means for Solving the Problems]
In order to solve the above problem, in the present invention, the vertical wall openings of the upper and lower water tanks, or a plurality of openings provided on the floor surface covering the upper and lower water tanks, perpendicular to the direction in which the openings extend An L-shaped receiving frame having an L-shaped cross section is arranged, and a thermosetting resin plate is placed and fitted on the L-shaped receiving frame to cover the upper and lower water tank openings. Curable resin plate-like body, the front and back surfaces are composed of thermosetting resin thin plates, a honeycomb-like structure or a foamed resin block is arranged and integrated between these two thin plates, and the thermosetting resin A peripheral end reinforcing foamed resin body is arranged and integrated at a peripheral end of the plate-shaped body. The peripheral end reinforcing foamed resin body is made to correspond to the height and depth of the L-shaped receiving frame. A notched mounting portion is provided, and the peripheral end reinforcement Wherein the mounting portion of the resin body is formed by allowing mounting-fitting, provides covering structure of the upper and lower water tank opening.
[0007]
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Hereinafter, the present invention will be described in detail.
In the present invention, the water supply (purification) tank (pond) refers to a sedimentation tank, a sedimentation tank, a mixing tank, a filtration tank, a water purification tank, a water distribution tank, and the like in a water supply (purification) facility disposed on the ground. (Pond) refers to sedimentation tanks, sewage adjustment tanks, activated sludge (aeration) tanks, biological reaction tanks, mixing tanks, filtration tanks, terminal treatment tanks and the like in sewage treatment plants and human waste treatment plants. In the present invention, the opening means the vertical wall openings of the upper and lower water tanks when the upper and lower water tanks are small to medium-sized, and the opening provided at an appropriate position on the floor covering the upper part when the upper and lower water tanks are large. means.
[0008]
The water tank is constructed of concrete. The plane shape of the upper and lower water tanks varies depending on the type of the water tank, and is a rectangle of 0.3 m to 6 m on one side and 1 m × 100 m on the other side, having a depth of 1 m to 10 m and a wall thickness of the water tank of 5 cm to 50 cm. Selected by range. When the plan shape of the concrete water basin is small or medium, an L-shaped cross section cut at right angles to the direction in which the opening extends is formed in the vertical wall opening of the water basin. A notch (L-shaped support) is provided. When the upper and lower water tanks have a large planar shape, an L-shaped support having the same structure as above is provided in an opening provided at an appropriate position on the floor covering the upper part of the water tank.
[0009]
The L-shaped support base has a function of supporting and fixing an L-shaped receiving frame having a metal L-shape, which will be described later. When constructing an aquarium by injecting concrete into a wooden frame, an L-shaped support is provided using a frame having a portion forming an L-shaped support, or after a wall is constructed of concrete. , Can also be provided by a drop. The size (dimensions) of the L-shaped support is 30 to 100 mm in height (H in FIG. 1 described later) according to the size (capacity) of the water tank, the thickness of the vertical wall surface of the water tank, and the thickness of the upper floor surface of the water tank. And the width (W in FIG. 1 described later) are preferably selected in the range of 30 to 100 mm. The width (W) is preferably not more than の of the thickness of the vertical wall surface of the water tank and the upper floor surface of the water tank.
[0010]
The L-shaped receiving frame has a function of protecting the wall surface of the water tank opening from being damaged when opening and closing a cover for covering the water tank opening fitted to the L-shaped receiving frame. It is preferably prepared from a metal material or a resin material. Examples of the metal include iron, stainless steel, and aluminum alloy, and examples of the resin material include a thermosetting resin such as an unsaturated polyester, a melamine resin, a phenol resin, and a urea resin. The dimensions of the L-shaped receiving frame are preferably the same as the height (H) and the width (W) of the L-shaped support provided at the opening of the water tank (see FIG. 1 described later). If the thickness of the metal forming the L-shaped receiving frame is too small, there is a possibility that the metal will be deformed in the course of transportation, storage, construction and the like, and if it is too thick, the weight will increase and the cost will increase. The thickness of the metal constituting the L-shaped receiving frame is preferably selected in the range of 3 to 10 mm, and particularly preferably in the range of 3 to 7 mm.
[0011]
The cover to be placed and fitted on the L-shaped receiving frame at the opening of the water tank is prepared by a thermosetting resin plate (hereinafter, may be simply referred to as “plate”). The plate-like body is made of a thermosetting resin thin plate on the front and back, and a honeycomb-like structure or a foamed resin block is integrally arranged between these two thin plates.
[0012]
In the present invention, the term "honeycomb-like structure" refers to a structure in which a short structure cut at a right angle to a direction in which the honeycomb-like structure extends extends between two front and back thermosetting resin thin plates. The honeycomb-like structure has a cross section cut into a short shape in the direction in which it extends, and has a corrugated shape, a hexagonal column shape, a square column shape, a columnar shape, or a structure selected from a combination thereof. The corrugated one is typically formed by contacting and integrating corrugated peaks, and the hexagonal column is typically formed by integrating hexagonal columns in close-packed form, Is typically a lattice having a planar cross-sectional shape forming a lattice, and a columnar shape is typically a column in which the contact portions are integrated in a close-packed manner. As a combination of these, a hexagonal column, a quadrangular column, a cylindrical column, or the like may be arbitrarily combined and selected. Preferably, both ends of the columnar body are closed. The wall surface of the columnar body and the contact part of the wall surface connect the two thin plates on the front and back to improve the strength of the plate-like body, and the part surrounded by the wall forms an independent void to exhibit heat insulation, Reduce body weight.
[0013]
Both the front and back thin sheets and the honeycomb-like structure disposed between the thin sheets are prepared from a thermosetting resin. Examples of the thermosetting resin include an unsaturated polyester resin, a melamine resin, a phenol resin, and a urea resin. Unsaturated polyester resins are preferred from the viewpoints of moldability and the strength of the plate when manufacturing the plate. It is preferable to mix glass fibers with the thermosetting resin because the strength of the plate-like body can be greatly improved. The glass type of the glass fiber is not limited, and the fiber may be in any form such as a single fiber or a chopped strand obtained by converging several tens of long single fibers into a length of 1 to 10 mm. The blending amount of the glass fiber can be selected in the range of 20 to 45% by weight. The glass fiber is preferably surface-treated for the purpose of improving the affinity with the thermosetting resin.
[0014]
The thickness (t1) of the two front and back thin plates constituting the thermosetting resin plate-like body, a structure that is cut short in the direction in which the honeycomb-like structure extends, and both ends of the columnar body are made of the same material The length (height) can be selected from a range of 20 mm to 10 cm. Regarding the thickness (t2) of the wall surface of the columnar body, if both are too thin, the strength is not sufficient, and if too thick, the weight increases and the cost increases, and both are not preferable. It is preferable that the thickness (t1) of the two front and back thin plates be selected in the range of 2 mm to 5 mm, and the thickness (t2) of the wall surface of the columnar body be selected in the range of 0.2 mm to 1 mm. A coloring agent, a light stabilizer, an ultraviolet absorber and the like can be blended with the thermosetting resin forming the front and back thin plates. It is preferable to form a non-slip exhibiting a concavo-convex pattern on the surface of the thin plate disposed on the front side of the two thin plates on the front and back sides. When the area of the plate-like body is large, it is preferable to dispose a beam that integrally joins the two thin plates on the front and back in the honeycomb-like structure. The beam may be one or more in the shape of a thin plate or a prism, or may be a combination of these in a lattice shape.
[0015]
In the present invention, the foamed resin block is disposed between the front and back two thermosetting resin thin plates, and functions to reinforce the plate-like body and to provide heat insulation. The resin constituting the foamed resin block may be either a thermoplastic resin or a thermosetting resin. Examples of the thermoplastic resin include styrene resins such as polystyrene and ABS resin, olefin resins such as polyethylene and polypropylene, vinyl chloride resins, and acrylic resins. Examples of the thermosetting resins include unsaturated polyester resins and melamine. Resins, phenol resins, urea resins, and the like. The foamed resin block preferably has a foaming ratio of 2 to 50 times and a thickness of 20 mm to 10 cm and has a plate-like appearance. Even when the area of the plate-shaped body is large, it is preferable to dispose a beam for integrally joining the front and back thin plates in the foamed resin block. The beam may be one or more in the shape of a thin plate or a prism, or may be a combination of these in a lattice shape.
[0016]
A peripheral end reinforcing foamed resin body is arranged at the peripheral end of the thermosetting resin plate-shaped body, and is integrated with the two thin plates on the front and back and a honeycomb-like structure or a foamed resin block. The peripheral end reinforcing foamed resin body functions to reinforce the peripheral end of the plate-like body. If the width of the peripheral end reinforcing foamed resin body (the width extending from the outermost end to the central portion of the plate-shaped body) is too small, the peripheral end reinforcing foamed resin body sufficiently exerts the reinforcing function of the peripheral end of the plate-shaped body. On the other hand, if the size is too large, the plate-shaped body becomes heavy and the cost increases, which is not preferable.
[0017]
In order to manufacture a thermosetting resin plate having the above structure, two front and back thin plates, a honeycomb-like structure or a foamed resin block, and a portion of a peripheral end portion reinforced foamed resin body are prepared in a separate process in advance. These can be combined into a plate by thermocompression bonding.
[0018]
The peripheral end reinforcing foamed resin body is provided with a mounting portion corresponding to the height and depth of the L-shaped receiving frame. The mounting portion is formed by cutting out a plate-like body having a size larger than the height (H) of the L-shaped receiving frame, and is set to be equal to or slightly smaller than the height (H) of the L-shaped receiving frame. It is preferable that the dimension when the size is slightly reduced is substantially the same as the thickness (2 mm to 10 mm) of the packing interposed when the placing portion is placed and fitted on the L-shaped receiving frame. The width of the cutout is the same as or slightly larger than the width (W) of the L-shaped receiving frame.
[0019]
The type of resin that forms the peripheral edge reinforcing foamed resin body is the same type of resin that is listed as constituting the front and back two thin plates and the honeycomb-like structure, polyurethane resin, thermoplastic resin, and thermosetting resin. It may be a mixture of thermoplastic resins. When glass fiber is also added to the resin constituting the peripheral end reinforcing foamed resin body, the strength is improved, and even if the thickness of the mounting portion is smaller than the original thickness of the plate-shaped body, the mounting portion is damaged. It is difficult to perform, which is preferable. The type, form, and blending amount of glass fibers can be the same as those in the front and back two thin plates and the honeycomb-like structure.
[0020]
The cover made of a thermosetting resin plate may be used to observe the condition in the water tank or open the cover to add a drug. A viewing window can also be provided. When a cover made of a thermosetting resin plate is placed on the L-shaped receiving frame and fitted, a rubber packing such as chloroprene rubber is preferably interposed in the width of the L-shaped receiving frame.
[0021]
【Example】
Hereinafter, the present invention will be described in more detail with reference to the drawings, but the present invention is not limited to these examples.
[0022]
FIG. 1 is a vertical sectional side view showing an example of a cover structure according to the present invention, and FIG. 2 is a vertical sectional side view showing an example of a conventional cover structure. Although FIGS. 1 and 2 show examples of the cover structure of the opening of the vertical wall surface, this structure can be applied to the cover of the floor opening covering the upper and lower water tanks. In the figure, 1 is a water tank wall, 2 is an L-shaped support, 3 is an L-shaped receiving frame, 4 is a plate-like body, 5 is a front side thin plate, 6 is a back side thin plate, and 8 is a wall surface of a honeycomb-like structure 7. Numeral 9 denotes a void portion, 10 denotes a peripheral end reinforcing foamed resin body, 11 denotes a mounting portion, and 12 packings.
[0023]
In the cover structure according to the present invention shown in FIG. 1, an L-shaped cross section cut at a right angle to the length direction at the opening of the upper and lower water tank has an L-shape having a height (H) of 35 mm and a width (W) of 35 mm. A mold support 2 is provided, and an L-shaped receiving frame 3 having a thickness of 4 mm, a height (H) of 50 mm, and a width (W) of 50 mm is arranged on the L-shaped support 2. On the other hand, the plate-like body 4 made of a thermosetting resin and having a thickness of 50 mm has thin plates 5 and 6 having a thickness of 5 mm integrally provided on both surfaces of a honeycomb-like structure 7. At the peripheral end of the plate-like body 4, a peripheral-end reinforcing foamed resin body 10 in which 25% by weight of a glass fiber chopped strand was mixed with a polyurethane resin and filled with a three-fold foamed resin was integrally formed. The peripheral end reinforcing foamed resin body 10 is provided with a mounting portion 11 (thickness 43 mm, depth width 41 mm) cut out corresponding to the height and depth of the L-shaped receiving frame 3. The placing portion 11 is placed and fitted to the L-shaped receiving frame 3 via a packing 12 (thickness: 3 mm) made of polychloroprene rubber.
[0024]
In the conventional cover structure shown in FIG. 2, the L-shaped support 2 has a height (H) of 50 mm and a width (W) of 50 mm, and the L-shaped support 2 has a thickness of 5 mm and a height (H). An L-shaped receiving frame 3 having a size of 50 mm and a width (W) of 50 mm is arranged, and a plate-like body 4 made of a thermosetting resin and having a thickness of 50 mm is provided with a polychloroprene rubber packing 12 (thickness). 2 mm).
[0025]
In the example shown in FIG. 1, since the reinforcing foamed resin body is arranged and integrated at the peripheral edge of the plate-shaped body 4, this portion is reinforced and hardly damaged even if the cover is opened and closed many times. Although the thickness of the plate-like body 4 is 50 mm, since the mounting portion 11 is 33 mm thick, an L-shaped receiving frame for a plate-like body having a thickness of 35 mm can be used. . As a result, there is no need to manufacture an L-shaped receiving frame for a thickness of 50 mm, and since the weight of the L-shaped receiving frame is light, the cost is low, and the number of parts is reduced. Construction work becomes easier. On the other hand, in the case of the conventional cover structure, it is necessary to prepare L-shaped receiving frames of a number corresponding to the thickness of the plate-like body, which increases the number of parts, and complicates product management and construction work. Met.
[0026]
【The invention's effect】
As described in detail above, the present invention has the following special advantageous effects, and its industrial utility value is extremely large.
1. The cover in the cover structure of the upper and lower water tank opening according to the present invention, when the honeycomb-like structure is disposed between the two thin plates on the front and back, was cut short in the direction in which the honeycomb-like structure extends. Since the thin plate made of thermosetting resin is integrated at both ends of the structure, it is excellent in strength despite its light weight.
2. The cover in the cover structure of the upper and lower water tank opening according to the present invention has excellent strength despite its light weight when the foamed resin block is integrally disposed between the two thin plates on the front and back. .
3. The cover in the cover structure of the upper and lower water tank openings according to the present invention has a peripheral end reinforced foamed resin body formed at the peripheral end of the thermosetting resin plate, so that the peripheral end of the plate is formed. However, it is reinforced by this, and the peripheral end is hardly damaged.
[0027]
4. Conventionally, the size (height and width) of the L-shaped support is changed according to the size (area) of the aquarium opening, so that a large number of L-shaped receiving frames are required. Such a cover structure of the upper and lower water tank opening, the size of the water tank opening, even if the thickness of the thermosetting resin plate-like body changes, the notch size of the peripheral end reinforcing foamed resin body than the conventional one. Since the size can be reduced and the thickness of the mounting portion can be changed, the type of the L-shaped receiving frame can be significantly reduced and the weight can be reduced.
5. The lid structure of the opening and closing of the water tank according to the present invention can reduce the number of parts and can easily manage production, storage, transportation, construction, and the like.
6. Since the cover structure of the opening and closing of the water tank according to the present invention can reduce the number of parts, the costs required for production, storage, transportation, construction, and the like can be significantly reduced.
[Brief description of the drawings]
FIG. 1 is a vertical sectional side view showing an example of a cover structure according to the present invention.
FIG. 2 is a vertical sectional side view showing an example of a conventional cover structure.
[Explanation of symbols]
1: water tank wall 2: L-shaped support 3: L-shaped receiving frame 4: plate 5: front thin plate 6: back thin plate 7: honeycomb-like structure 8: wall 9: void 10: peripheral edge Reinforced foamed resin body 11: mounting part 12: packing

Claims (6)

An L-shaped cross-section cut at right angles to the direction in which the openings extend in the vertical wall openings of the upper and lower water tanks, or a plurality of openings provided on the floor covering the upper and lower water tanks A receiving frame is arranged, and a thermosetting resin plate is placed and fitted on the L-shaped receiving frame to cover the upper and lower water tank openings. A honeycomb-like structure or a foamed resin block is arranged and integrated between these two thin plates, and the peripheral end of the thermosetting resin plate-like body has a peripheral end. A part reinforced foamed resin body is arranged and integrated, and a mounting portion cut out corresponding to the height and the depth of the L-shaped receiving frame is provided in a part of the peripheral end reinforced foamed resin body. A mounting portion of the peripheral end reinforcing foamed resin body can be mounted and fitted to the L-shaped receiving frame. Characterized by comprising, covering the structure of the upper and lower water tank opening. The honeycomb-like structure is selected from a structure in which a cross section when cut short at right angles to the extending direction has a corrugated shape, a hexagonal column shape, a square column shape, a columnar shape, or a structure combining these. The lid structure for an opening of a water tank according to claim 1, wherein the lid is formed. The lid structure for the upper and lower water tank openings according to claim 1 or 2, wherein the foamed resin block is a foam made of a thermoplastic resin and / or a thermosetting resin. The lid for the upper and lower water tank openings according to any one of claims 1 to 3, wherein the thermosetting resin plate-like body is a flat type, and an upper surface thereof is provided with an anti-slip exhibiting a concavo-convex pattern. Construction. The resin constituting the thermosetting resin plate is unsaturated polyester, and the peripheral end reinforcing foamed resin is a thermoplastic resin foam and / or thermosetting resin foam reinforced with glass fiber. The cover structure for the upper and lower water tank openings according to any one of claims 1 to 4, which is a body. The upper and lower water tank opening according to any one of claims 1 to 5, wherein a reinforcing beam is disposed at an appropriate position of the honeycomb-like structure or the foamed resin block disposed between the two thin plates. Cover structure.

Images