JP2008043880A - Water treatment apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an effective technique for rationalizing the work of stacking an upper tank of a tank main body in which a water treatment mechanism for applying predetermined treatment to water to be treated is housed, for a water treatment apparatus having the tank main body. <P>SOLUTION: The water treatment apparatus 100 has projection parts which are formed to be projected upward from the upper surface of a top plate part of the upper tank 110. The projection parts has such constitution that a diameter of a manhole opening of a first projection part 111 is made smaller than that of the manhole opening of a third projection part 113, and below the manhole opening of the first projection part 111, an enlarged diameter area is provided which has an enlarged diameter opening of a diameter larger than that of the manhole opening and has a shape corresponding to that of the third projection part 113. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a construction technique of a water treatment apparatus that houses a water treatment mechanism that performs predetermined water treatment on water to be treated in a tank body.

Conventionally, various configurations for facilitating storage and transportation of an upper tank or a lower tank before joining have been proposed for a flange-joined purification tank formed by joining flange surfaces of an upper tank and a lower tank. For example, the following Patent Document 1 discloses a configuration in which the lower tanks can be inverted by 180 ° and stacked by devising the corrugated shape in the lower tank of the septic tank.
Japanese Utility Model Publication No. 5-13596

By the way, since the upper tank of this kind of septic tank has a protruding part having a manhole opening upward from the top plate portion, when the stacking of the upper tanks is assumed, the position of each protruding part and Further ingenuity is required regarding the shape. In particular, in the case of an upper tank having manhole openings with different opening diameters for design reasons, it is assumed that the protruding part of one upper tank interferes with the other upper tank when the upper tanks are stacked. Therefore, a technique for rationally stacking upper tanks by preventing this interference is required.
Therefore, the present invention has been made in view of such points, and in a water treatment apparatus that houses a water treatment mechanism that performs predetermined water treatment on water to be treated in a tank body, stacking work of upper tanks of the tank body It is an object to provide an effective technique for streamlining the system.

  The present invention is configured to solve the above problems. In addition, this invention is a technique which can be applied with respect to the water treatment apparatus which accommodates the water treatment mechanism which processes various to-be-processed water including the domestic waste water discharged | emitted from a general household etc. in a tank main body.

  The water treatment apparatus according to the present invention is configured as a water treatment apparatus that houses a water treatment mechanism that performs predetermined water treatment on water to be treated in a tank body. The water treatment apparatus of the present invention is defined as an apparatus after the water treatment mechanism is accommodated in the tank body or the tank body itself before the treatment mechanism is accommodated. In addition, the “water treatment mechanism” here is a mechanism for performing predetermined water treatment on various types of water to be treated. Typically, a site for removing contaminants, organic pollutants in the water to be treated As appropriate, combine the site where anaerobic treatment (reduction) is performed with an anaerobic filter bed, the site where the treated water is subjected to aerobic treatment and filtration with the contact filter bed, the site where temporary storage and disinfection treatment is performed in the treated water, etc. Consists of. The tank body is composed of a bowl-shaped upper tank and a lower tank, both of which are substantially rectangular in plan view, and is formed of a flange-joined type formed by overlapping and bonding the bonding flange surfaces of the upper tank and the lower tank. It is configured.

  The upper tank of the present invention has a plurality of protrusions and manhole openings. Each of the plurality of projecting portions is formed so as to project upward from the upper surface of the top plate portion of the upper tank, and a manhole cover is placed thereon. The manhole opening is configured as an opening that is formed in an opening shape at each protrusion and is covered with a manhole cover placed thereon. The plurality of protrusions include a first protrusion provided on one end side in the longitudinal direction of the upper tank and a second protrusion provided on the other end side in the longitudinal direction of the upper tank. It is supposed to be configured.

  In the present invention, in particular, the opening diameter of the manhole opening of the first protrusion is smaller than the opening diameter of the manhole opening of the second protrusion, and the opening diameter is larger than the manhole opening below the manhole opening. It is set as the structure which has a diameter-expanded area | region. And when stacking at least two of the upper tanks, the first protrusions of the other upper tank are covered over the second protrusions of the one upper tank. That is, in a state where the upper tanks are inverted by 180 °, the other upper tank is overlapped from above one upper tank. At this time, in this invention, it is comprised so that the diameter expansion area | region of the 1st protrusion part of the other upper tank may accommodate the 2nd protrusion part of one upper tank. In such a configuration, during the stacking operation between the upper tanks, interference between the second projecting portion of one upper tank and the lower surface of the top plate portion of the other upper tank is avoided, and An engagement state is formed in which the second projecting portion is fitted from below into the enlarged region of the first projecting portion of the other upper tank.

  According to such a configuration of the upper tank of the present invention, it is possible to efficiently stack the upper tanks and to stabilize the stacked state after the upper tanks are stacked. Become. Further, by providing an enlarged region corresponding to the shape of the second protrusion at the lower portion of the manhole opening of the first protrusion, the opening diameter of the manhole opening of the first protrusion and the second protrusion Even if the opening diameters of the manhole openings are different, it is possible to stack the upper tanks, so that the degree of freedom in selecting the opening diameter of the manhole opening in the upper tank and the arrangement of the manhole openings can be increased. it can. For example, the diameter (size) of the manhole cover can be reduced by setting the opening diameter of the manhole opening of the first projecting portion to the minimum diameter within the standard range of the upper tank. It is possible to reduce the weight and to improve the workability with respect to the manhole cover attaching / detaching operation. On the other hand, by setting the opening diameter of the manhole opening of the second protrusion to be larger than the opening diameter of the manhole opening of the first protrusion, the opening diameter of the manhole opening is increased at a necessary portion. Therefore, the visibility in the tank body can be secured. In the present invention, it is sufficient that a correspondence relationship is formed at least between the diameter of the enlarged region in the first protrusion and the diameter of the second protrusion.

  Moreover, in the water treatment apparatus of the further form which concerns on this invention, the 1st protrusion part of an upper tank equips the lower part of the manhole opening with a diameter expansion area | region, and the upper edge and diameter expansion area | region of this manhole opening are provided. The line of sight connecting the lower part defines the upper limit of the visual field when the operator looks into the tank body from the outside of the tank body through the manhole opening, so that the operator can see the inside of the tank body from the tank body through the manhole opening. It is set as the structure which extended the visual field at the time of peeping outward in the tank main body. According to such a configuration, it is possible to improve the field-of-view rate at the manhole opening of the first projecting portion, and it is possible to design the size of the manhole opening of the first projecting portion to be suppressed. In addition, when the upper tanks are stacked, the diameter-enlarging region of the first protrusion that accommodates the second protrusion contributes to an improvement in the visual field ratio in the tank body during normal operation of the water treatment apparatus. This is reasonable.

  Moreover, in the water treatment apparatus of the further form which concerns on this invention, the 1st protrusion part of an upper tank is made into the two-step neck structure provided with a front end side cylindrical area | region, a base end side cylindrical area | region, and a level | step difference area | region. ing. The distal cylindrical region is a cylindrical portion that forms a manhole opening on the distal end side of the first projecting portion, and the proximal cylindrical region is the enlarged diameter region on the proximal end side of the first projecting portion. The cylindrical part to be formed is used. The step region is a right-angled region formed between the end side cylindrical region and the base end side cylindrical region. In this step region, the step angle is approximately 90 °. According to such a configuration, the first protrusion of the upper tank has a two-step neck structure, so that the field of view below the manhole opening can be further expanded outward, whereby the first protrusion It is possible to further improve the field of view at the manhole opening in the part.

  As described above, according to the present invention, in a water treatment apparatus that houses a water treatment mechanism that performs predetermined water treatment on water to be treated in a tank body, in particular, it protrudes upward from the top surface of the top plate portion of the upper tank. The diameter of the manhole opening of the first protrusion provided on the one end side is set to the diameter of the manhole opening of the second protrusion provided on the other end side. Efficient stacking of the upper tubs by adopting a configuration in which a diameter-enlarged region having a diameter larger than that of the manhole opening is provided below the manhole opening of the first protrusion and smaller than the opening diameter. It became possible to perform well, and it became possible to stabilize the stacking state after the upper tanks were stacked.

  Below, the structure etc. of the sewage treatment apparatus of one Embodiment in this invention are demonstrated based on drawing. In the present embodiment, an apparatus for processing domestic wastewater (sewage) discharged from a general household will be described.

An appearance of a sewage treatment apparatus 100 which is an embodiment of a “water treatment apparatus” in the present invention is shown in FIG. 1, and a treatment flow in the sewage treatment apparatus 100 in FIG. 1 is shown in FIG.
As shown in FIG. 1, a sewage treatment apparatus 100 according to the present embodiment accommodates a predetermined purification treatment mechanism 102 inside a tank body 101 formed into a tank shape. As shown in FIG. 2, the purification treatment mechanism 102 is roughly divided into a contaminant removal tank 105, an anaerobic filter bed tank 106, a contact filter bed tank 107, a treated water tank 108, and a disinfection tank 109. The contaminant removal tank 105 is a tank that separates impurities contained in the treated water from the treated water using solid-liquid separation means such as an inflow baffle (not shown). Performs liquid separation function. The anaerobic filter bed tank 106 has a function of anaerobically treating (reducing) organic pollutants in the water to be treated. The contact filter bed tank 107 fulfills a function of performing an aerobic treatment and a filtration treatment of the water to be treated. The treated water tank 108 functions to temporarily store water before being transferred to the disinfection tank 109. The disinfection tank 109 performs a function of disinfecting water that has flowed from the treatment water tank 108. The purification treatment mechanism 102 constitutes a “water treatment mechanism for performing a predetermined water treatment on the water to be treated” in the present invention.

  The sewage that has flowed into the tank body 101 from the upstream (left side in FIG. 2) in the purification treatment mechanism 102 is a contaminant removal tank 105, an anaerobic filter bed tank 106, a contact filter bed tank 107, a treated water tank 108, a disinfection tank 109 And then discharged to the outside of the tank body 101. The sewage treatment apparatus 100 of the present embodiment is an apparatus that purifies and discharges domestic wastewater (sewage), and is also referred to as a “septic tank” or a “drainage treatment tank”. In the present embodiment, the water flowing in each tank constituting the sewage treatment apparatus 100 is referred to as “sewage”, “treated water”, or “water”.

  The tank body 101 includes an upper tank (also referred to as “upper tank”) 110 and a lower tank (also referred to as “lower tank”) 120. The tank body 101 corresponds to the “tank body” in the present invention. The upper tank 110 is a bowl-shaped tank having a substantially rectangular shape in plan view, and is a tank disposed on the upper part of the lower tank 120. On the other hand, the lower tank 120 is a bowl-shaped tank having a substantially rectangular shape in plan view, and is a tank disposed in the lower part of the upper tank 110. Here, the upper tank 110 corresponds to the “upper tank” in the present invention, and the lower tank 120 corresponds to the “lower tank” in the present invention. By joining the joint flange surface of the joint flange 110a of the upper tank 110 and the joint flange surface of the joint flange 120a of the lower tank 120 in a state where they are overlapped with each other, the flange-joined tank body 101 is formed.

  The upper tank 110 includes at least an inflow portion 103, a discharge portion 104, and projecting portions 111, 112, and 113. The inflow part 103 is configured as a pipe part through which dirty water flows into the tank body 101. The discharge unit 104 is configured as a pipe part that discharges the treated water purified by the purification processing mechanism 102 to the outside of the tank body 101. The protrusions 111, 112, and 113 are all cylindrical portions that protrude upward from the top surface of the top plate portion of the upper tank 110, and each protrusion is on an extended line in which the upper tank 110 extends in the longitudinal shape. Has been placed. Specifically, the first protrusion 111 is disposed on the inflow portion 103 side, which is one end side of the upper tank 110, and the third protrusion 113 is provided on the discharge portion 104 side, which is the other end side of the upper tank 110. The second projecting portion 112 is disposed between the first projecting portion 111 and the third projecting portion 113. Each protrusion has a circular manhole opening (manhole openings 114, 115, 116 described later), and a manhole frame 117 on which a manhole cover 117a is placed is attached to the upper side of each protrusion. In a state where the manhole cover 117a is placed on the manhole frame 117, the manhole opening is blocked by the manhole cover 117a.

  In addition, a plurality of corrugated portions 110b in which the side wall surface is recessed toward the inner peripheral side are provided on the side wall surface on the long side of the upper tank 110 that is substantially rectangular in plan view. Similarly, a plurality of corrugated portions 120b in which the side wall surface is recessed toward the inner peripheral side are provided on the side wall surface on the long side of the lower tank 120 that is substantially rectangular in plan view. The corrugated shape formed on the side wall surface by the plurality of corrugated portions constitutes a reinforcement structure called a so-called “corrugated shape”. In the present embodiment, when the upper tank 110 or the lower tank 120 is inverted 180 degrees and stacked, the corrugated parts of the upper tanks 110 and the corrugated parts of the lower tanks 120 are mutually connected. It is arranged to fit. This corrugated shape can also be provided at the corners of the upper tank 110 and the lower tank 120.

  3 to 6 will be referred to for further detailed configuration of the upper tank 110. Here, FIG. 3 shows a perspective view of the upper tank 110 of the present embodiment as viewed obliquely from above. 4 to 6 show an AA line sectional structure, a BB line sectional structure, and a CC line sectional structure of the upper tank 110 in FIG. 3, respectively.

  As shown in FIGS. 3 and 4, the first protruding portion 111 of the upper tank 110 is provided on one end side (upstream side) in the longitudinal direction of the upper tank 110 and is configured as a cylindrical portion having a manhole opening 114. Is done. The opening diameter of the manhole opening 114 is, for example, φ450 mm. The first projecting portion 111 includes a proximal-side cylindrical region 111a located on the proximal side of the tubular part, a distal-side tubular region 111b located on the distal side of the tubular part, and a proximal-side cylinder. A stepped region 111c having a right angle formed between the cylindrical region 111a and the front end side cylindrical region 111b. Regarding the inner diameter of the first projecting portion 111, the inner diameter d1 of the distal end side cylindrical region 111b is configured to be smaller than the inner diameter d2 of the proximal end side cylindrical region 111a. That is, this 1st protrusion part 111 is made into the two-step neck structure (two-step neck shape) by the base end side cylindrical area | region 111a and the front end side cylindrical area | region 111b. In the step region 111c, the step angle is approximately 90 °.

  The first protrusion 111 referred to here corresponds to the “first protrusion” in the present invention. Further, the proximal end side cylindrical region 111a constituting the first protrusion 111 corresponds to the “expanded region” and the “base end side cylindrical region” in the present invention, and constitutes the first protrusion 111. The front end side cylindrical region 111b corresponds to the “front end side cylindrical region” in the present invention, and the stepped region 111c corresponds to the “stepped region” in the present invention.

  As shown in FIGS. 3 and 5, the second protrusion 112 of the upper tank 110 is configured as a cylindrical portion having a manhole opening 115. The opening diameter of the manhole opening 115 is, for example, φ450 mm. In addition, the inner diameter of the second protrusion 112 is the same as the inner diameter d1 of the distal end side cylindrical region 111b of the first protrusion 111.

  As shown in FIGS. 3 and 6, the third protrusion 113 of the upper tank 110 is provided on the other end side (downstream side) in the longitudinal direction of the upper tank 110 and is configured as a cylindrical portion having a manhole opening 116. Has been. The opening diameter of the manhole opening 116 is designed to be larger than the manhole openings of the first protrusion 111 and the second protrusion 112, and is, for example, φ600 mm. Further, the inner diameter d3 of the third projecting portion 113 is larger than the inner diameter d1 of the distal end side cylindrical region 111b of the first projecting portion 111 and is larger than the inner diameter d2 of the proximal end side cylindrical region 111a of the first projecting portion 111. Is also slightly smaller. The third protrusion 113 corresponds to the “second protrusion” in the present invention.

  In the present embodiment, interior members such as a filter medium of the contact filter bed tank 107, an air lift pump of the treated water tank 108, a chemical cylinder of the disinfection tank 109, and the like are disposed locally or intensively in the vicinity of the manhole opening 116. . Therefore, regarding the design of the opening diameter of the manhole opening 116, it is effective to easily check such an interior member by expanding the opening diameter of the manhole opening as compared with other manhole openings. The opening diameter of the manhole opening 116 is defined by the inner wall surface shape of the third protrusion 113.

  On the other hand, regarding the opening diameters of the manhole openings 114 and 115, the diameter (size) of the manhole cover can be reduced by keeping the opening diameter of the manhole openings smaller than the manhole opening 116. It is effective for reducing the weight and improving workability regarding the manhole cover attaching / detaching operation. In this case, the opening diameter of the manhole opening 114 is defined by the inner wall surface shape of the front end-side cylindrical region 111b among the members of the first protrusion 111, and the opening diameter of the manhole opening 115 is that of the second protrusion 112. It is defined by the inner wall surface shape.

  Here, the case where at least two upper tanks identical to the upper tank 110 having the above configuration are stacked will be described with reference to FIGS. This stacking operation is effective when stacking a plurality of upper tanks vertically during storage or transportation.

  FIG. 7 is a side view showing another upper tank 210 stacked on the upper tank 110, and FIG. 8 is a plan view of the stacked state of FIG. 7 as viewed from above. As shown in FIG. 7, when another upper tank 210 is stacked on the upper tank 110, the upper tank 210 is inverted by 180 ° with respect to the upper tank 110, and then the upper tank 210 is covered with the upper tank 110. Fit to cover and stack by this. In this stacked state, as shown in FIG. 8, the first protrusion 111 of the upper tank 210 is disposed above the first protrusion 111 of the upper tank 110, and the upper portion of the upper tank 110 is positioned above the second protrusion 112. The second protrusion 112 of the tank 210 is disposed, and the first protrusion 111 of the upper tank 210 is disposed above the third protrusion 113 of the upper tank 110.

  FIG. 9 is referred to regarding the structure of the portion where the first protrusion 111 of the upper tank 210 is disposed above the third protrusion 113 of the upper tank 110 in this stacked state. FIG. 9 shows a cross-sectional view taken along the line DD in FIG. As described above, in the present embodiment, the inner diameter d3 of the third protrusion 113 is configured to be slightly smaller than the inner diameter d2 of the proximal-side cylindrical region 111a of the first protrusion 111. In the state where the upper tub 210 is stacked on top, as shown in FIG. 9, the third protrusion 113 of the upper tub 110 is fitted into the base end side cylindrical region 111a of the first protrusion 111 of the upper tub 210 from below. You will get stuck.

  At this time, interference between the third protrusion 113 of the upper tank 110 and the lower surface of the top plate portion of the upper tank 210 is avoided during the stacking operation of the upper tanks. Therefore, when stacking the upper tanks, it is possible to efficiently perform the stacking, and it is effective to stabilize the stacked state after the upper tanks are stacked. Thus, in this Embodiment, regarding the structure of the 1st protrusion part 111, the said 1st protrusion part 111 is employ | adopted by employ | adopting the 2 step neck structure by the base end side cylindrical area | region 111a and the front end side cylindrical area | region 111b. The base end side cylindrical region 111a involved in the stacking of the upper tank is provided on the lower side, while the distal end side cylindrical region 111b involved in the weight reduction of the tank body 101 is provided above the first projecting portion 111 as described above. Is going to be established.

  Further, in the present embodiment, regarding the two-stage neck structure of the first projecting portion 111, the proximal end side cylindrical region 111a and the distal end side cylindrical region 111b are formed in consideration of the visual field ratio in the tank body 101. Is preferred. Thereby, the visual field rate in the tank main body 101 can be improved. For example, when a water level reference line (also referred to as “water level guide line”) is provided on the inner wall surface of the tank main body 101, the water level reference line has visibility. It becomes possible to improve.

  Refer to FIG. 10 for the effect of improving the field of view rate. FIG. 10 is a cross-sectional view showing how the operator visually recognizes the inside of the tank body 101 from the outside of the tank body 101 through the manhole opening 114 in the upper tank 110 of the present embodiment. In FIG. 10, the case where the first projecting portion 111 has a two-step neck structure (hereinafter, also referred to as “first configuration”) is indicated by a solid line as in the present embodiment, while the same diameter as the first configuration. This is a configuration having a manhole opening, and the case where the first projecting portion 111 has a one-stage structure (hereinafter, also referred to as “second configuration”) is indicated by a two-dot chain line.

  As shown in FIG. 10, the first line of sight in the present embodiment (first configuration), that is, the line of sight connecting the upper edge of the manhole opening 114 and the lower part of the proximal cylindrical region 111a starting from the viewpoint P is as follows. The upper limit of the visual field when the operator looks into the tank body 101 from the outside of the tank body 101 through the manhole opening 114 is defined. Thereby, the field of view of the operator is expanded outward in the tank body as compared with the field of view whose upper limit is defined by the second line of sight in the second configuration. It is possible to improve the field of view. In the present embodiment, a manhole is adopted by adopting a configuration in which a step region 111c formed between the proximal end side cylindrical region 111a and the distal end side cylindrical region 111b of the first protrusion 111 is formed in a right angle. The field of view below the opening can be expanded further outward, thereby further improving the field of view at the manhole opening of the first protrusion 111. Moreover, when ensuring the same view rate, by improving the view rate in the tank main body 101, the opening diameter of the manhole opening 114 can be kept small, thereby reducing the weight of the tank main body 101. In addition, it is possible to improve workability with respect to the work of attaching and detaching the manhole cover.

  As described above, according to the present embodiment, it is possible to efficiently stack the upper tanks, and to stabilize the stacked state after the upper tanks are stacked. . In addition, by providing a proximal-side cylindrical region 111a corresponding to the shape of the third protruding portion 113 below the distal-end-side cylindrical region 111b of the first protruding portion 111, the manhole opening 114 of the first protruding portion 111 is formed. Even if the opening diameter and the opening diameter of the manhole opening 116 of the third projecting portion 113 are different, the upper tanks can be stacked, so the selection of the opening diameter of the manhole opening in the upper tank or the manhole The degree of freedom regarding the arrangement of the openings can be increased. For example, the diameter (size) of the manhole cover 117a can be reduced by setting the opening diameter of the manhole opening 114 of the first protrusion 111 to the minimum diameter within the standard range of the upper tank 110, thereby The tank body 101 can be reduced in weight, and workability can be improved with respect to the attachment / detachment work of the manhole cover 117a. On the other hand, by setting the opening diameter of the manhole opening 116 of the third protrusion 113 to be larger than the opening diameter of the manhole opening 114 of the first protrusion 111, the opening diameter of the manhole opening is set at a necessary portion. The visibility in the tank main body 101 can be ensured by raising.

  Further, according to the present embodiment, the first protrusion 111 of the upper tub 110 includes the base end side cylindrical region 111a below the tip end side cylindrical region 111b, so that the upper edge and the base of the manhole opening 114 are A field of view including a line of sight connecting the end-side cylindrical region 111a is formed, whereby the field of view below the manhole opening 114 is expanded outward. According to such a configuration, the visual field ratio at the manhole opening 114 of the first projecting portion 111 can be improved, and the design in which the opening diameter of the manhole opening 114 of the first projecting portion 111 is suppressed is possible. In addition, when the upper tanks are stacked, the proximal end side cylindrical region 111a of the first protrusion 111 that accommodates the third protrusion 113 is formed in the tank body 101 during normal operation of the water treatment apparatus 100. This is reasonable because it contributes to improving the field of view.

[Other Embodiments]
In addition, this invention is not limited only to said embodiment, A various application and deformation | transformation can be considered. For example, each of the following embodiments to which the above embodiment is applied can be implemented.

  In the above embodiment, the case where the step region 111c formed between the proximal end side cylindrical region 111a and the distal end side cylindrical region 111b of the first projecting portion 111 has a right angle has been described. The shape formed between the proximal end side cylindrical region 111a and the distal end side cylindrical region 111b can be variously changed.

  In the above embodiment, the manhole opening formed in each protrusion of the upper tank 110 is a circular manhole opening. However, in the present invention, the manhole opening of each protrusion is circular or Can be square. For example, in the upper tank 110 configured as described above, the manhole openings of the first protrusion 111 and the third protrusion 113 are both rectangular, or the manhole opening of the first protrusion 111 is circular, and the third protrusion 113 It is possible to adopt a configuration in which the manhole opening is square. In these configurations, the third projecting portion 113 is shaped so that the third projecting portion 113 can accommodate the proximal end side cylindrical region 111a of the first projecting portion 111, and thus, similar to the above embodiment. Streamline stacking work between upper tanks.

It is a figure which shows the external appearance of the water treatment apparatus 100 which is one Embodiment of the "water treatment apparatus" in this invention. It is a figure which shows the processing flow in the sewage treatment apparatus 100 in FIG. It is the perspective view which looked at the upper tank 110 of this Embodiment from diagonally upward. It is a figure which shows the AA sectional view structure of the upper tank 110 in FIG. It is a figure which shows the BB sectional structure of the upper tank 110 in FIG. It is a figure which shows the CC sectional view structure of the upper tank 110 in FIG. 4 is a side view showing a state in which another upper tank 210 is stacked on the upper tank 110. FIG. FIG. 8 is a plan view of the stacked state of FIG. 7 as viewed from above. It is a figure which shows the mode of the DD line | wire cross section in FIG. In the upper tank 110 of this Embodiment, it is sectional drawing which shows a mode that an operator visually recognizes the inside of the tank main body 101 from the tank main body 101 through the manhole opening 114. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Water treatment apparatus 101 ... Tank main body 102 ... Purification process mechanism 103 ... Inflow part 104 ... Discharge part 105 ... Dust removal tank 106 ... Anaerobic filter bed tank 107 ... Contact filter bed tank 108 ... Treated water tank 109 ... Disinfection tank 110, 210 ... Upper tank 110a, 120a ... Joining flange 110b, 120b ... Corrugated part 111 ... First protrusion 111a ... Base end side cylindrical area 111b ... End side cylindrical area 111c ... Step area 112 ... Second protrusion 113 ... First 3 protrusions 114, 115, 116 ... manhole opening 117 ... manhole frame 117a ... manhole cover 120 ... lower tank

Claims (3)

A water treatment apparatus that houses a water treatment mechanism that performs a predetermined water treatment on the water to be treated in a tank body,
The tank body is composed of a bowl-shaped upper tank and a lower tank, both of which are substantially rectangular in plan view, and is formed by bonding the flange flange surfaces of the upper tank and the lower tank,
The upper tank is formed so as to protrude upward from the top surface of the top plate portion of the upper tank, and a plurality of protrusions on which the manhole cover is placed, and an opening shape in each protrusion. Having a manhole opening covered by the manhole cover placed;
The plurality of projecting portions include a first projecting portion provided on one end side in the longitudinal direction of the upper tank and a second projecting portion provided on the other end side in the longitudinal direction of the upper tank. The first projecting portion has an opening diameter of the manhole opening smaller than the opening diameter of the manhole opening of the second projecting portion, and has an opening diameter larger than the manhole opening below the manhole opening. Is a configuration having an enlarged diameter region,
When stacking at least two of the upper tanks, the first protrusions of the other upper tank are covered over the second protrusions of one of the upper tanks, and the other upper tank The diameter-enlarging region of the first protrusion is configured to accommodate the second protrusion of one of the upper tanks, and thereby the second protrusion of one of the upper tanks The water treatment apparatus is characterized in that interference with the lower surface of the top plate portion of the other upper tank is avoided. The water treatment device according to claim 1,
The first projecting portion of the upper tub is provided with the enlarged region at the lower part of the manhole opening so that the line of sight connecting the upper edge of the manhole opening and the lower part of the enlarged region is indicated by the operator. A water treatment apparatus characterized in that an upper limit of a visual field when the inside of the tank body is viewed from the outside of the tank body through the opening is configured to extend the visual field outward in the tank body. The water treatment device according to claim 2,
The first projecting portion of the upper tank includes a distal end side tubular region as a tubular portion that forms the manhole opening on the distal end side of the first projecting portion, and a proximal end side of the first projecting portion. A proximal end side tubular region as a tubular portion forming the enlarged diameter region, and a right-angled step region formed between the distal end side tubular region and the proximal end side tubular region. A water treatment apparatus having a stepped neck structure.

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