Water treatment system

Abstract

To prevent a control panel for a water treatment device from being damaged by flooding in a water treatment system including a water treatment device.SOLUTION: There is provided a water treatment system including: a water treatment device; and a frame 10 that houses a compressor 60 which is an electric device related to the water treatment device and a control panel 70 that controls driving of the compressor 60, wherein a control panel housing 70a including a rigid box with only a lower end opened is arranged in the frame 10. Then, in the inside of the control panel housing 70a, the control panel 70 is fixed at a position higher than a lower end of the housing by a predetermined distance or more.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a water treatment system including a water treatment device and related electrical equipment. More particularly, the present invention relates to a water treatment system that can prevent electrical equipment and control panels for water treatment devices from being damaged by flooding.

Background Art

[0002] Conventionally, as shown in Patent Document 1 and Patent Document 2, for example, a filtration device having a layer of a filtering material inside a filtration tank, filtering supplied raw water by passing it through the layer of the filtering material, and rotating a screw arranged inside the filtration tank to knead and wash the filtering material is known. Since this type of filtration device can wash the filtering material well, replacement of the filtering material is basically unnecessary. Taking advantage of this characteristic, it is often mounted on a vehicle and transported to a so-called remote location and installed and used there. Note that the filtration device transported and used as described above is generally used as a system combined with related electrical equipment and a control panel that controls the driving of this electrical equipment and the filtration device.

[0003] Here, when the filtration device is transportable as described above, it is often used in places where, for example, river flooding is likely to occur or where it is affected by a tsunami. When the filtration device is used in such a place, if the river floods or a tsunami occurs, the electrical equipment and control panels used together with the filtration device to constitute the above system may be flooded, leading to damages such as short circuits and malfunctions. In order to avoid such flood damage, it is conceivable to house the electrical equipment and control panels inside a waterproof case that keeps the inside and outside in a highly waterproof state.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

SUMMARY OF THE INVENTION

PROBLEMS TO BE SOLVED BY THE INVENTION

[0005] However, since such a watertight case ensures a high level of watertightness, its structure is complex and expensive, and it tends to be very heavy. Therefore, a water treatment system composed of electrical equipment and control panels arranged in this watertight case and a filtration device also becomes expensive and has a large weight.

[0006] The present invention has been made in view of the above circumstances, and in a water treatment system including a water treatment device such as a filtration device and related electrical equipment, it is an object to prevent the electrical equipment and control panels for the water treatment device from suffering water immersion damage, to reduce the weight of the configuration for preventing water immersion damage, and to be able to be formed at low cost.

MEANS FOR SOLVING THE PROBLEMS

[0007] A water treatment system according to the present invention includes: a water treatment device such as a filtration device, electrical equipment related to the water treatment device, and a control panel that controls the driving of the water treatment device and the electrical equipment, and a frame body that is installed and used on a predetermined surface, in a water treatment system having inside the frame body, a rigid housing with only the lower end open, and inside, a control panel housing that fixes the control panel at a position higher than the lower end by a predetermined distance or more and / or a bag body with only the lower end open, and an electrical equipment cover that houses the electrical equipment is arranged inside, which is characterized in that.

[0008] In the water treatment system according to the present invention, the water treatment device and the frame body may be integrated via piping related to water treatment. Alternatively, the water treatment device may be fixed within the above frame body.

[0009] Also, it is desirable that the lower end of the control panel housing is at the same height position over substantially the entire circumference. On the other hand, the cover for electrical equipment is preferably composed of a flexible bag body and a cover inner frame disposed within this flexible bag body and defining the outer shape of the flexible bag body. It is desirable that the lower end of the cover for electrical equipment whose outer shape is defined by the cover inner frame in this way is at the same height position over substantially the entire circumference.

[0010] Further, the control panel housing has an opening door portion on the side that is swingable between an open position where the control panel is exposed and a closed position where it is not exposed, and has a waterproof structure that keeps the inside of the housing watertight with respect to the outside when in the closed position. Furthermore, it is desirable that this control panel housing has a main operation panel for the control panel fixed inside the above rigid housing and a sub-operation panel fixed outside the above rigid housing and acting in the same manner as the main operation panel. And it is desirable that this sub-operation panel is covered with a waterproof cover.

[0011] Also, in the water treatment system according to the present invention, a chemical tank for storing chemicals for the water treatment device is disposed within the above frame body, it is desirable that the vicinity of the upper end of the above chemical tank is communicated with the vicinity of the upper end of a communication pipe having an open lower end and a closed upper end.

[0012] The present invention provides a control panel housing and a cover for electrical equipment that can constitute the water treatment system as described above. That is, the control panel housing according to the present invention is a control panel housing for housing a control panel inside, which is composed of a rigid housing with only the lower end open, and is characterized in that the control panel is fixed inside at a position higher than the lower end by a predetermined distance or more. Also, the cover for an electric device according to the present invention is In a cover for an electric device that houses an electric device inside, It is characterized by being composed of a bag body with only the lower end open.

Advantages of the Invention

[0013] In the water treatment system according to the present invention, when a housing for a control panel, which is composed of a rigid housing with only the lower end open and has a control panel fixed inside at a position higher than the lower end by a predetermined distance or more, is arranged inside the frame body, even if the inside of the frame body is flooded, an air layer is formed inside the housing for the control panel, so the water level is kept lower than outside the housing for the control panel. Therefore, if the above-mentioned predetermined distance is set appropriately, it becomes difficult for the flooding water level to reach the control panel, and thus the control panel is prevented from suffering from flooding damage. Also, in the water treatment system according to the present invention, when a cover for an electric device, which is composed of a bag body with only the lower end open and houses an electric device inside, is arranged inside the frame body, even if the inside of the frame body is flooded, an air layer is formed inside the cover for the electric device composed of the bag body, so the water level inside this cover is kept lower than the water level outside the cover. In general, in an electric device used outdoors, the main parts including the electric circuit are arranged not in the lower part close to the ground surface but in a relatively high part. Therefore, if the water level inside the cover is kept low as described above, the main parts of the electric device inside the cover are less likely to suffer from flooding damage such as short circuits.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Embodiments for Carrying Out the Invention

[0015] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIGS. 1 to 5 show a water treatment system according to the first embodiment of the present invention. FIGS. 1 to 3 show the configuration inside the frame constituting this water treatment system, and FIGS. 4 and 5 show the water treatment apparatus constituting this water treatment system. The water treatment apparatus in this embodiment is, for example, the filtration apparatus 1. In the following description, "upper" and "lower" mean upper and lower in the state where the filtration apparatus 1 and the above-mentioned frame are installed on the installation surface 6 as shown in FIGS. 5 and 2, respectively, unless otherwise noted.

[0016] The filtration apparatus 1 has, for example, the basic structure shown in the above-mentioned Patent Document 1. FIGS. 4 and 5 show its planar shape and side shape, respectively. The filtration apparatus 1 has a filter medium layer inside the filtration tank 2, and filters the raw water supplied from the raw water injection pipe 3 by passing it through the filter medium layer from top to bottom. The filtered treated water flows out of the filtration tank 2 through the treated water outlet pipe 4. This filtration apparatus 1 is provided with a screw cleaning mechanism that rotates a screw (not shown) vertically arranged at the center of the filtration tank 2 by a driving device 5 to knead and wash the filter medium.

[0017] When the filtration medium cleaning process by this screw cleaning mechanism is completed, before the rotation of the screw stops, backwashing (reverse washing) is performed by causing the cleaning water to flow backward from the treated water outlet pipe 4 to obtain a rinsing effect. This reverse washing continues even after the screw stops. The reverse washing water flowing backward from the treated water outlet pipe 4 jets out from the side of the filter bed on which the filtration medium is placed upward toward the layer of the filtration medium. The dirt and substances peeled off from the filtration medium by this reverse washing float and are discharged outside the filtration tank 2 from the raw water injection pipe 3 together with the water containing them. The connection of the raw water injection pipe 3 and the treated water outlet pipe 4 will be described in detail later.

[0018] The filtration device 1 is installed and used, for example, on an outdoor flat installation surface 6 where concrete is placed. When installing this, for example, when the filtration device 1 is to be used permanently, the filtration device 1 (more specifically, the bottom of the filtration tank 2) may be firmly fixed on the installation surface 6 using anchor bolts or the like, or may be fixed relatively loosely on the installation surface 6. Since this filtration device 1 enables the above-described screw cleaning and reverse washing, basically no replacement of the filtration medium is required. Therefore, the filtration device 1 can be transported by vehicle to, for example, a construction site or the like and used there, not limited to facilities such as general water purification plants. The present invention is preferably applied to a water treatment system having such a water treatment device that can be transported by vehicle. That is, such a water treatment device that can be transported is often transported together with a frame 10 described later and used in places where water flooding is likely to occur, such as near a river.

[0019] Next, with reference to FIGS. 1 to 3, electrical equipment and the like used with the filtration device 1 will be described. FIG. 1 is a plan view showing the inside of a frame body 10 that houses this electrical equipment and a control panel for electrical equipment and the like. FIG. 2 is a side view showing the inside of the frame body 10 as viewed upward from a portion along the line A-A in FIG. 1, and FIG. 3 is a front view showing the inside of the frame body 10 as viewed rightward from a portion along the line B-B in FIG. 1. As an example, the frame body 10 in the present embodiment is composed of a bottom frame 10a formed in a shape like a Chinese character 'Ri' or a Chinese character 'Kou', a bottom plate 10b fixed to the upper surface of the bottom frame 10a, side plates 10c erected and fixed upward from the four sides of the bottom plate 10b, and a top plate 10d that closes the space surrounded by these side plates 10c from above, and it defines a substantially rectangular parallelepiped-shaped equipment arrangement space inside.

[0020] The above bottom frame 10a is formed using, for example, channel steel, and the bottom plate 10b, side plates 10c, and top plate 10d are formed using, for example, steel plates. FIG. 1 omits the top plate 10d, FIG. 2 omits the lower side plate 10c in FIG. 1, and FIG. 3 omits the left side plate 10c in FIG. 1 to show the inside of the equipment arrangement space. Also, in FIG. 2, many of the elements existing on the back side of the illustrated elements are omitted from the illustration. In FIG. 3, most of the piping on the front side of the illustrated elements is omitted from the illustration.

[0021] On the above bottom plate 10b, a treated water outflow / reverse wash water introduction pipe 12 supported by a pipe support fixture 11 and the like is disposed. One end of this treated water outflow / reverse wash water introduction pipe 12 extends outside (right side) the side plate 10c in FIGS. 1 and 2, and is connected to the treated water outlet pipe 4 shown in FIGS. 4 and 5 via, for example, a flange. The other end of this treated water outflow / reverse wash water introduction pipe 12 extends outside (left side) the side plate 10c in FIGS. 1 and 2 and is connected to a treatment water tank (not shown).

[0022] On the bottom plate 10b, a raw water introduction / reverse wash water outflow pipe 14 supported by a pipe support fixture 13 or the like is disposed. One end of this raw water introduction / reverse wash water outflow pipe 14 extends outside (to the right side) of the side plate 10c in FIGS. 1 and 2 and is connected to the raw water injection pipe 3 shown in FIGS. 4 and 5 via, for example, a flange. The other end of this raw water introduction / reverse wash water outflow pipe 14 extends outside (to the left side) of the side plate 10c in FIGS. 1 and 2 and is connected to a reverse wash drainage tank or the like (not shown).

[0023] Also, on the bottom plate 10b, a treated water outflow pipe 16 supported by a pipe support fixture 15 or the like is disposed. This treated water outflow pipe 16 is connected to the aforementioned treatment water tank via a flange, rises once and then falls within the equipment arrangement space, and is connected to the raw water introduction / reverse wash water outflow pipe 14 from above. A branch pipe 17 is connected to the falling portion of the treated water outflow pipe 16. After this branch pipe 17 bends horizontally, it extends above the treated water outflow / reverse wash water introduction pipe 12 and then falls to be connected to the treated water outflow / reverse wash water introduction pipe 12 from above.

[0024] Above the treated water outflow / reverse wash water introduction pipe 12, a raw water introduction pipe 18 is disposed. This raw water introduction pipe 18 is connected to a raw water tank (not shown) via a flange, extends along the treated water outflow / reverse wash water introduction pipe 12, then bends horizontally, extends above the raw water introduction / reverse wash water outflow pipe 14, and then falls to be connected to the raw water introduction / reverse wash water outflow pipe 14 from above.

[0025] As clearly shown in FIG. 1, on the bottom plate 10b, a coagulant tank 20, a hypochlorous acid tank 30, a coagulant injection pump 40, a hypochlorous acid injection pump 50, a compressor 60, and a control panel 70 are disposed. Among them, the coagulant injection pump 40, the hypochlorous acid injection pump 50, and the compressor 60 are electrical equipment in the present invention.

[0026] The flocculant injection pump 40 supplies the flocculant stored in the flocculant tank 20, together with the raw water from above the filter medium layer, into the interior of the filtration tank 2 through a pipe (not shown). The hypochlorous acid injection pump 50 supplies the hypochlorous acid stored in the hypochlorous acid tank 30 into the interior of the filtration tank 2 in the same manner as the above-described flocculant through a pipe (not shown). Such supply of hypochlorous acid may be performed with respect to the treated water in the treatment water tank connected to the treated water outflow / backwash water introduction pipe 12 (i.e., the water filtered by the filtration device 1) as described above. The compressor 60 supplies the operating air when, for example, an air-operated valve is used as a supply control valve provided in the above-described flocculant supply pipe, hypochlorous acid supply pipe, etc..

[0027] As described above, each element disposed on the bottom plate 10b, that is, disposed within the frame body 10, may be damaged by flooding depending on the location where the frame body 10 is placed. That is, in the present embodiment, the frame body 10 composed of the bottom plate 10b, side plates 10c, etc. is not structured to keep its interior in a highly watertight state against the outside. For example, as shown in FIG. 2, a part of the side plate 10c is provided with a door 10g or the like for an operator to enter the frame body 10 for maintenance, inspection, and operation of electrical equipment and the control panel 70, but means such as packing for keeping a highly watertight state between the peripheral edge of this door 10g and the side plate 10c is not provided. Thereby, weight reduction and cost reduction of the frame body 10 are achieved.

[0028] Hereinafter, a configuration for preventing the elements inside the frame body 10 from being damaged when flooded will be described. First, a configuration for preventing water damage to the control panel 70 will be described. The control panel 70 is fixed, as is often the case, inside a control panel housing (hereinafter simply referred to as the housing) 70a having a generally square tube shape with its upper end closed. Note that the entire control panel housing 70a is sometimes referred to as the control panel, and the control panel 70 is sometimes referred to as the control unit, but in that case, comparison may be made based on the above correspondence relationship.

[0029] The housing 70a is a highly rigid housing formed of, for example, a steel plate, and is fixed within the frame 10 by, for example, bolt - connecting its lower base portion onto the bottom plate 10b. As shown in FIG. 2, the housing 70a has an opening door portion 70c for closing the working opening provided at the lower part of one side surface, and also has a similar opening door portion 70d at the upper part. The opening door portions 70c and 70d are swingable between an open position for exposing the internal control panel 70 and a closed position (the position shown in the figure) for not exposing it, by being hinge - held or the like. The upper opening door portion 70d fixedly holds the main operation panel 70b on the inside, which is exposed when set to the open position. The main operation panel 70b is for operating the control panel 70. Note that such a main operation panel 70b may be fixed to the control panel 70 side so that when the opening door portion 70d is set to the open position, the main operation panel 70b appears.

[0030] On the other hand, outside the housing 70a, particularly outside the frame 10 in this embodiment, a sub - operation panel 80 that acts in the same manner as the main operation panel 70b is arranged. Specifically, this sub - operation panel 80 is fixed on one side plate 10c. The sub - operation panel 80 is always covered by a waterproof cover 81 that is rotatable around a horizontal axis (the state in FIG. 2). If the waterproof cover 81 is rotated to flip it up, the sub - operation panel 80 appears and operations can be performed. If such a sub - operation panel 80 is provided, when an operator wants to operate the control panel 70, it is convenient because there is no need to open the door 10g described above and enter the frame 10. Note that even if the frame 10 is installed outdoors, since there is the waterproof cover 81, the sub - operation panel 80 is not exposed to rain or the like.

[0031] Means such as packing are provided between the housing 70a and the peripheral edge of the upper opening door portion 70d to maintain a high - level watertight state. In this way, the opening door portion 70d has a waterproof structure that keeps the inside of the housing watertight against the outside when in the closed state. A similar waterproof structure is also applied to the lower opening door portion 70c. Note that even if water - logging damage occurs, a waterproof cover for covering the main operation panel 70b may be provided so that at least the main operation panel 70b can be operated.

[0032] The base part at the lower end of the housing 70a is formed at substantially the same height over the entire circumference and is, for example, bolted onto the bottom plate 10b of the frame body 10 as described above. However, a waterproof structure such as a packing is not provided between the base part and the bottom plate 10b. Therefore, if the inside of the frame body 10 is flooded, water can easily enter the housing 70a from the peripheral part around the base part of the housing. In the present invention, with regard to the control panel housing, the phrase "only the lower end is open" shall mean "open" including a state where water can pass through the gap in this way.

[0033] The housing 70a of the present embodiment without the waterproof structure such as the packing is advantageous in terms of weight reduction and cost reduction. And even though the lower end of the housing 70a is open in this way, damage due to flooding to the control panel 70 inside it is prevented as follows.

[0034] Flooding into the frame body 10 generally progresses such that the water level on the bottom plate 10b gradually rises over time. For example, this is the case when flooding is caused by the flooding of a river near the frame body 10. Hereinafter, such flooding shall be referred to as "normal flooding".

[0035] Basically, in the present embodiment, when the above-described normal flooding occurs, damage to the control panel 70 is minimized. For this purpose, in the present embodiment, the control panel 70 is fixed inside the housing 70a at a position higher than a predetermined distance H (see FIG. 2) or more from the lower end of the housing 70a. When there is flooding into the frame body 10, since an air layer is formed inside the housing 70a, the water level inside the housing 70a is usually lower than the water level outside the housing 70a. However, hereinafter, for simplicity of explanation, this water level difference is ignored and the predetermined distance H is considered. Incidentally, if necessary, the predetermined distance H may be set in consideration of this water level difference as well.

[0036] The value of the above-mentioned predetermined distance H can be appropriately determined according to the installation environment, installation conditions, etc. of the frame body 10. For example, if a user who uses this frame body 10 together with the filtration device 1 shown in FIGS. 3 and 4 examines the flooding situation of a river near the installation position of the frame body 10 and the situation of normal flooding caused thereby retrospectively, and obtains a study result that the possibility of flooding up to a position higher than the distance H1 from the installation surface 6 is extremely low, when the total height of the bottom frame 10a is H0, the predetermined distance H = H1 - H0 may be set. Needless to say, a value obtained by adding a margin distance to this predetermined distance H may also be used as the predetermined distance when actually installing the control panel 70.

[0037] In addition, normal flooding caused by flooding of a river as described above generally often starts from a position lower than the distance H2 from the installation surface 6. That is, because it is common to provide embankment means such as embankment or steel frame structures on the ground surface where normal flooding starts, and use the upper surface of the embankment means as the installation surface 6. When the embankment height by that means is H2 (m), for example, if it is desired to protect the control panel 70 from flooding up to a height of 2 m from the ground surface, the predetermined distance H = 2 - H2 (m) may be set. Also, when the installation surface 6 is a high platform ground surface higher than the ground surface where normal flooding starts, with the height difference between the ground surface and the high platform ground surface being H2 (m), the predetermined distance H = 2 - H0 - H2 (m) may be set.

[0038] As described above, by fixing the control panel 70 in the housing 70a at a position higher than the lower end of the housing 70a by a predetermined distance H or more, it is possible to prevent damage to the control panel 70 caused by normal flooding. However, not limited to this normal flooding, as described above, even when the frame body 10 is hit by a tsunami, after the housing 70a is once flooded with water from above, the water level around the housing 70a may gradually rise over time, and it is also possible to prevent damage to the control panel 70 in such a situation.

[0039] The frame body 10 in this embodiment is composed of a bottom frame 10a, a bottom plate 10b, side plates 10c, and a top plate 10d. However, as described above, the side plates 10c and the top plate 10d may not be provided. Even when the top plate 10d is omitted and the side plates 10c are provided, the side plates 10c may be formed lower than the elements on the bottom plate 10b, such as the housing 70a. Further, the bottom plate 10b may not be a single plate as in this embodiment, but may be a set of narrow plates laid across each other with a space therebetween on the bottom frame 10a.

[0040] Next, a configuration for preventing water immersion damage to the compressor 60, which is one of the electrical devices, will be described. FIG. 6 shows the compressor 60 installed on the bottom plate 10b and a cover covering the compressor 60 from above, and their planar shape, side shape, and front shape are shown as (a), (b), and (c), respectively. In this FIG. 6, the compressor 60 is schematically illustrated with only its outer shape shown by a two-dot chain line for a part.

[0041] The compressor 60 is mounted on a substantially rectangular frame-shaped pedestal 61a formed using, for example, angle steel. A vertical member 61b extending upward is erected on the pedestal 61a, and a cover receiving member 61c is fixed to the upper end of the vertical member 61b. The cover receiving member 61c is a member having a frame-shaped portion that expands in the lateral direction, and a compressor cover 60C, which will be described later, is mounted thereon.

[0042] The compressor cover 60C basically consists of a cover base 62a in the shape of a generally rectangular frame made of a member extending in the vertical direction, a cover inner frame 62b formed on the cover base 62a, and a flexible cover fabric 63 disposed outside the cover inner frame 62b. The cover base 62a is formed of, for example, a metal plate. The cover inner frame 62b is formed in a cage shape by combining, for example, metal rod members. The cover fabric 63 is formed of, for example, a synthetic resin sheet material, a synthetic resin cloth material, etc., and has left and right end portions (also the left and right end portions in FIGS. 6(a) and 6(b)) in a shape where a part of a generally oval shape is cut off, and an intermediate portion extending to connect the peripheral portions of these left and right end portions.

[0043] In FIG. 6, the cover fabric 63 is shown as being transparent for the purpose of showing the cover inner frame 62b and the like, but it may actually be formed in this way, or may be formed opaque. Although this cover fabric 63 is flexible, when it is adhered onto the cover inner frame 62b as described later, its outer shape is defined by the cover inner frame 62b and it becomes a generally kamaboko-shaped bag body. Note that the cover fabric 63 alone may be made into a bag body having the above-described outer shape without using the cover inner frame 62b in particular.

[0044] The cover fabric 63 is adhered onto the cover inner frame 62b and the cover base 62a, and then the portion near the lower end is fixed to the cover base 62a by, for example, 12 rivets 63a. When in this state, the compressor cover 60C composed of the cover base 62a, the cover inner frame 62b, and the cover fabric 63 has the lower end, that is, the lower end of the cover base 62a, open, and the portion above it, including the upper end, is all closed by the cover fabric 63. Also, the portion near the lower end of the cover fabric 63 is fixed to the cover base 62a while maintaining a substantially watertight state over the entire circumference.

[0045] The compressor cover 60C with the above configuration is attached to the cover receiving member 61c as follows. A laterally extending portion is formed on the cover base 62a, and for example, two positioning cap bolts 62c are held on that portion with their heads facing upward. Further, a hook portion of an adjustment fastener 62d is attached to the cover base 62a, and the main body portion including the clamp handle of the adjustment fastener 62d is attached to a vertical member 61b erected on the gantry 61a. Therefore, first, the two positioning cap bolts 62c are aligned with nuts fixed to the cover receiving member 61c side to position the cover base 62a with respect to the cover receiving member 61c, and then the clamp handle of the adjustment fastener 62d is pushed to perform a clamping operation.

[0046] By the above operations, the cover base 62a, that is, the compressor cover 60C, is held by the cover receiving member 61c while maintaining a predetermined relative position. Usually, thereafter, the positioning cap bolts 62c are rotated with a hexagon wrench and tightened against the nuts.

[0047] When the compressor cover 60C is thus held by the cover receiving member 61c, the compressor cover 60C in the shape of a bag with an open lower end and a closed upper end is in a state where the compressor 60 is housed inside. In this state, the lower end of the compressor cover 60C, that is, the lower end of the cover base 62a in a substantially rectangular frame shape, is at the same height position over the entire circumference.

[0048] When the compressor cover 60C is provided as described above, even when the water level around the compressor cover 60C reaches a position higher than the compressor 60 when the above-described normal flooding occurs, the water level inside the compressor cover 60C where air remains stays at the height position indicated by WL in FIGS. 6(b) and 6(c). Thereby, it is possible to prevent the main parts including the electrical configuration of the compressor 60 from being damaged by flooding.

[0049] And since the compressor cover 60C is composed of a simple bag body with an open lower end as described above, compared with the case of housing the entire compressor 60 in a highly watertight enclosure or the like, an effect can be obtained that a configuration for preventing waterlogging damage can be formed more lightly and at lower cost. Particularly in the present embodiment, in order to make the compressor cover 60C a bag body as described above, a simple cover inner frame 62b formed in a basket shape by combining rod members is used, and the outer shape of the cover fabric 63 made of a sheet material, a cloth material, or the like is defined by this cover inner frame 62b. Therefore, the above effect is particularly remarkable.

[0050] In the present embodiment, as described above, the lower end of the compressor cover 60C is at the same height position over the entire circumference. If this is the case, compared with the situation where it is not, when the water level of waterlogging gradually rises, a large amount of waterlogging does not flow into the inside of the compressor cover 60C. That is, the water level of waterlogging in the compressor cover 60C (this also depends on the water level (water head) outside the compressor cover 60C) is difficult to rise above the lower end of the compressor cover 60C. If so, the main part including the electrical configuration of the compressor 60 can be protected from waterlogging from a lower position.

[0051] Although not shown in detail, the flocculant injection pump 40 and the hypochlorous acid injection pump 50 shown in FIGS. 1 and 2 are also covered with a cover for electrical equipment similar to the above-described compressor cover 60C. Therefore, these flocculant injection pump 40 and hypochlorous acid injection pump 50 are also similarly less likely to be damaged by waterlogging. Thus, in the water treatment system of the present invention, a plurality of electrical devices may be covered with a common cover for electrical equipment.

[0052] With the compressor cover 60C described above, the configuration for protecting the elements arranged inside it from water damage can also be applied to other elements in the water treatment system. For example, in this type of water treatment system, a pressure gauge with electrical contacts for measuring the pressure in various pipes is often used. For such a pressure gauge, it is advisable to provide, for example, a box-shaped transparent member that covers the display part and the contacts from above. Thereby, when waterlogging occurs, the water level does not rise significantly upward from the lower opening within this member, and it is possible to protect the display part and the contacts from waterlogging.

[0053] Next, a configuration for preventing the chemical solution stored in the chemical solution tank from being damaged by waterlogging will be described with reference to FIG. 7. This FIG. 7 shows an enlarged and detailed view of the flocculant tank 20, which is one of the chemical solution tanks, with (a) showing the front shape and (b) showing the side shape. Hereinafter, the flocculant tank 20 will be described, but the hypochlorous acid tank 30, which is another chemical solution tank, has the same configuration.

[0054] The flocculant tank 20 stores, for example, liquid PAC (polyaluminum chloride), and is composed of a bottom plate 20a fixed to the upper surface of the bottom plate 10b of the frame body 10, a front plate 20c, a rear plate 20d, and a pair of left and right side plates 20e erected and fixed on the bottom plate 20a, and a top plate 20f joined to the upper ends of these front plate 20c, rear plate 20d, and side plates 20e. It defines a space for storing the flocculant in a generally rectangular parallelepiped shape inside. Note that a plurality of mounting holes 10b are provided in the bottom plate 20a. The bottom plate 20a is attached to the bottom plate 10b using, for example, mounting bolts passed through these mounting holes 10b, but a detailed description thereof is omitted.

[0055] The front plate 20c is provided with a confirmation window in which a transparent member 21 is fitted to check the storage state of the flocculant. The top plate 20f is provided with an opening for injecting the flocculant, and a lid 22 for opening and closing the opening is combined with this opening. Further, a discharge pipe 23 with a valve is provided so as to penetrate one side plate 20e. The suction port of the aforementioned flocculant injection pump 40 (see FIGS. 1 and 2) is connected to this discharge pipe 23 via a pipe (not shown). A pipe (not shown) is connected to the discharge port of the flocculant injection pump 40, and this pipe opens above the filter medium layer inside the aforementioned filtration tank 2 (see FIGS. 4 and 5). Therefore, by driving the flocculant injection pump 40, the flocculant stored in the flocculant tank 20 can be supplied from above the filter medium layer into the filtration tank 2.

[0056] The inside of the flocculant tank 20 having the above configuration needs to be open to the atmosphere in order to suck the flocculant by the flocculant injection pump 40. For this purpose, in the flocculant tank 20 of this example, a pair of left and right side plates 20e are extended rearward (rightward in FIG. 7(b)) from the rear plate 20d, and the rear ends of this pair of side plates 20e are closed by an additional rear plate 20g. Thereby, a space surrounded by the rear plate 20d, a pair of side plates 20e, the additional rear plate 20g, and the top plate 20f is defined behind the rear plate 20d.

[0057] An opening 20m for communicating the above space and the flocculant storage space is provided near the upper end of the rear plate 20d. Further, the lower part of the above space may be closed by an appropriate member, but a communication opening 20h for opening the inside of the flocculant tank 20 to the atmosphere is provided in a part of the member.

[0058] In other words, the above configuration forms a flocculant tank 20 having a flocculant storage space in front of the rear plate 20d (leftward in FIG. 7(b)), and a communication path with an open lower end and a closed upper end is formed by the rear plate 20d, a pair of side plates 20e, the additional rear plate 20g, and the top plate 20f, and the vicinity of the upper end of this communication path communicates with the vicinity of the upper end of the flocculant tank 20.

[0059] When the area around the flocculant tank 20 is normally flooded, the floodwater will enter the space surrounded by the rear plate 20d, the pair of side plates 20e, the additional rear plate 20g, and the top plate 20f through the communication opening 20h. However, since air remains in the flocculant storage space of the flocculant tank 20, the floodwater level WL in the above space will be lower than the floodwater level around the flocculant tank 20. Therefore, even if the floodwater level around the flocculant tank 20 becomes as high as or higher than the height of the flocculant tank 20, the floodwater level WL in the above space will usually remain at a position lower than the opening 20m. If so, the floodwater will not enter the flocculant storage space through the opening 20m, thus preventing the stored flocculant from being damaged by the floodwater and becoming unusable.

[0060] Next, with reference to FIGS. 8 to 11, a water treatment system according to the second embodiment of the present invention will be described. The water treatment system according to the first embodiment described above is one in which the filtration tank 2 and the frame body 10 constituting the filtration device 1 are integrated via pipes related to water treatment. In contrast, the water treatment system according to this second embodiment is basically different in that the filtration tank 2 is installed in the frame body 10 and the two are integrated.

[0061] FIG. 8 is a plan view showing the inside of the frame body 10, FIG. 9 is a side view showing the inside of the frame body 10 as seen from the bottom to the top in FIG. 8, FIG. 10 is a side view showing the inside of the frame body 10 as seen from the top to the bottom in FIG. 8, and FIG. 11 is a front view showing the frame body 10 as seen from the right to the left in FIG. 8. In FIG. 11, the sub-operation panel 80 and the waterproof cover 81 outside the frame body 10 are omitted. In these figures, elements that are basically equivalent to the elements already described are assigned the same numbers as in FIGS. 1 to 7, and duplicate descriptions of these elements are omitted.

[0062] In the water treatment system according to this second embodiment, the raw water introduction pipe 100 has a portion that extends leftward from the frame body 10 in FIG. 8 and is connected to a raw water tank (not shown). The raw water introduction pipe 100 rises within the frame body 10 and then returns, rises after bending upward in FIG. 8, and is connected to the rising portion of the raw water introduction / reverse wash water outflow pipe 101. The upper portion of the raw water introduction / reverse wash water outflow pipe 101 bends toward the filtration tank 2 from the above-mentioned rising portion, and one end thereof opens above the filter medium layer inside the filtration tank 2. The lower portion of the raw water introduction / reverse wash water outflow pipe 101 from the above-mentioned rising portion extends in the left-right direction in FIG. 8, and the other end that exits the frame body 10 is connected to a reverse wash drainage tank (not shown) or the like.

[0063] Inside the filtration tank 2, one end of the treated water outflow / reverse wash water introduction pipe 102 opens at a position below the filter medium layer. The treated water outflow pipe 103 branched from the treated water outflow / reverse wash water introduction pipe 102 exits the frame body 10 and is connected to a treated water tank (not shown). Also, the reverse wash water introduction pipe 104 branched from the treated water outflow / reverse wash water introduction pipe 102 is connected to the above-mentioned treated water tank, for example, in order to use the treated water as reverse wash water. Explanation of piping that is not directly related to the present invention, such as other water level adjustment pipes 105, etc., will be omitted.

[0064] Also in the water treatment system according to this second embodiment, a configuration for preventing the flocculant injection pump 40, the hypochlorous acid injection pump 50, the compressor 60, the control panel 70, the flocculant in the flocculant tank 2, and the hypochlorous acid in the hypochlorous acid tank 30 from being damaged by flooding is applied in the same manner as in the first embodiment. Thereby, also in this embodiment, the same effects as those in the first embodiment can be obtained.

[0065] As described above, two embodiments in which the water treatment device is a filtration device have been described. However, the present invention is also applicable to a water treatment system in which a water treatment device other than a filtration device is used. In that case as well, the same effects as those described in the above embodiments can be obtained. Examples of such water treatment devices other than the filtration device include a dehydration treatment device, a coagulation sedimentation treatment device, and the like.

Explanation of Reference Numerals

[0066] 1 Filter device 2 Filter tank 3 Raw water inlet pipe 4 Treated water outlet pipe 10 Frame body 10a Bottom frame of the frame body 10b Bottom plate of the frame body 10c Side plate of the frame body 10d Top plate of the frame body 12 Treated water outflow / reverse wash water inlet pipe 14 Raw water inlet / reverse wash water outlet pipe 16 Treated water outflow pipe 18 Raw water inlet pipe 20 Coagulant tank 30 Hypochlorous acid tank 40 Coagulant injection pump 50 Hypochlorous acid injection pump 60 Compressor 60C Compressor cover 61a Mounting base 61b Vertical member 61c Cover receiving member 62a Cover base 62b Inner frame of the cover 63 Cover fabric 70 Control panel 70a Cabinet for the control panel 70b Main operation panel 70c, 70d Opening door parts of the cabinet for the control panel 80 Sub-operation panel 81 Waterproof cover 100 Raw water inlet pipe 101 Raw water inlet / reverse wash water outlet pipe 102 Treated water outflow / reverse wash water inlet pipe 103 Treated water outflow pipe 104 Reverse wash water inlet pipe

Claims

1. A water treatment device, an electric device related to the water treatment device, and a frame that houses the water treatment device and the control panel for controlling the driving of the water treatment device and the electric device, and is installed and used on a predetermined surface, In a water treatment system having: inside the frame, a control panel housing made of a rigid box body with only the lower end open, and the control panel is fixed inside at a position higher than the lower end by a predetermined distance or more, and / or a bag body with only the lower end open, and an electric device cover for housing the electric device is arranged inside. The water treatment system is characterized by this.

2. The water treatment system according to claim 1, wherein the water treatment device and the frame are integrated via piping related to water treatment.

3. The water treatment system according to claim 1, wherein the water treatment device is fixed inside the frame.

4. The water treatment system according to any one of claims 1 to 3, wherein the lower end of the control panel housing is at the same height position over substantially the entire circumference.

5. The water treatment system according to any one of claims 1 to 4, wherein the electric device cover consists of a flexible bag body and a cover inner frame arranged inside the flexible bag body to define the outer shape of the flexible bag body.

6. The water treatment system according to claim 5, wherein the lower end of the electric device cover whose outer shape is defined by the cover inner frame is at the same height position over substantially the entire circumference.

7. The water treatment system according to any one of claims 1 to 6, wherein the control panel housing has an opening door portion on the side that can swing between an open position where the control panel is exposed and a closed position where it is not exposed, and has a waterproof structure that keeps the inside of the housing watertight with respect to the outside when in the closed position.

8. The control panel housing is The main operation panel for the control panel fixed inside the rigid housing, The auxiliary operation panel fixed outside the rigid housing and acting in the same manner as the main operation panel, The water treatment system according to any one of claims 1 to 7, which has the above.

9. The water treatment system according to claim 8, wherein the auxiliary operation panel is covered with a waterproof cover.

10. The chemical tank for storing the chemicals for the water treatment device is arranged inside the frame body, The water treatment system according to any one of claims 1 to 9, wherein the vicinity of the upper end of the communication pipe with the lower end open and the upper end closed is communicated with the vicinity of the upper end of the chemical tank.

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