JP5048635B2 - Sewage relay pump equipment - Google Patents

Description

  The present invention relates to a solid separation type sewage relay pump facility used for sending sewage in a sewer.

  There is known a solid separation type sewage relay pump facility used for sending sewage in a sewer (see, for example, Patent Documents 1 and 2). The solid separation type sewage relay pump equipment includes a sewage storage tank, an inflow pipe, an inflow tank, a residue separation tank, a separator, and a submersible pump (sewage pump). A pump that separates slag contained in sewage with a separator, spills and temporarily stores it in a slag separation tank, and then pumps the slag together with the sewage by pump discharge water from the reverse direction. Water can be fed without clogging the sewage pump with a residue larger than the foreign substance passage diameter.

  The inflow tank of the solid separation type sewage relay pump equipment described in Patent Documents 1 and 2 has a large-area opening (upper opening) on the entire upper surface on the assumption that regular cleaning is performed, and an opening such as a slit is provided on the side wall. It is configured. Large scum contained in the sewage flowing in from the inflow pipe remains on the inflow tank, and sewage containing a relatively small sewage flows from the inflow tank to the slag separation tank. When the inlet of the residue separation tank or the solid-liquid separation mechanism is temporarily blocked, the sewage flowing from the inflow pipe overflows from the inflow tank and directly overflows (inflows) into the sewage storage tank. By passing this overflowing sewage through an opening provided in the side wall, the above-mentioned large scale residue is prevented from overflowing into the sewage storage tank.

Japanese Patent No. 414561 Japanese Patent No. 4145862

  However, in the solid separation type sewage relay pump facilities of Patent Documents 1 and 2, if regular cleaning is neglected and the opening of the side wall is clogged, a large residue will overflow into the sewage storage tank from the upper opening of the inflow tank when overflowing. There is a possibility that the submersible pump sucks in large spillage that has overflowed into the sewage storage tank, causing blockage. In addition, if there is an inflow that exceeds the amount of unknown water or temporary planned sewage inflow, even if the opening on the side wall is not clogged, a large residue can overflow into the sewage storage tank. There is also sex.

  It is conceivable to close the upper opening of the inflow tank with a net-like member in order to prevent overflow of a large scale residue. While the sewage can overflow through the mesh of the mesh member, the large scum that cannot pass through the mesh remains in the inflow tank, so that the large stag can overflow from the inflow tank to the sewage storage tank. Can be prevented. However, every time the large scale residue remaining in the inflow tank is removed, it is necessary to remove the net from the upper opening, which makes the maintenance management complicated. Moreover, hair, cloth, and other residues are entangled with the mesh member, making it very difficult to remove. Also in this respect, the maintenance management becomes complicated when the mesh member is employed.

  The present invention has been made in view of the problems in the conventional solid separation type sewage relay pump equipment, and ensures the overflow of the residue from the inflow tank to the sewage storage tank while ensuring the ease of maintenance. The problem is to prevent it.

  The present invention is a sewage relay pump facility for feeding sewage flowing from the upstream side through the inflow pipe to the downstream side through the water supply pipe, wherein the inflow pipe and the water supply pipe extend to the inside. A tank and a sewage storage tank, having a bottom and a side wall and having an upper opening; an opening end of the inflow pipe is disposed in the upper opening; and sewage flows into the interior from the inflow pipe An inflow tank, a screen that is disposed in the upper opening of the inflow tank except a portion where the inflow pipe is disposed in a plan view, and a plurality of capture members arranged at intervals, and the sewage storage tank And a backflow prevention mechanism that allows inflow of sewage from the inflow port but prevents outflow of sewage from the inflow port. And an outlet connected to the recording water pipe A waste separation tank having a waste water inlet and outlet, disposed in the waste water storage tank, and a discharge port connected to the waste water inlet and outlet of the waste separation tank, while a suction port is opened in the waste water storage tank, A submersible pump that allows reverse flow of sewage from the discharge port to the suction port at the time of stoppage, and is interposed between the sewage inlet / outlet of the residue separation tank and the discharge port of the submersible pump. Disclosed is a sewage relay pump facility comprising a solid-liquid separation mechanism that separates sewage residue from sewage flowing into an outlet and allows a sewage flow from the discharge port to the sewage inlet / outlet.

  When the submersible pump is stopped, sewage flows into the inflow tank from the open end of the inflow pipe, and further flows into the residue separation tank from the inlet opening at the bottom of the inflow tank. The sewage flowing into the slag separation tank flows into the sewage storage tank through the sewage inlet / outlet, the solid / liquid separation mechanism, the submersible pump discharge port, and the submersible pump suction port. The residue is separated from the sewage flowing into the discharge port of the submersible pump by the solid-liquid separation mechanism. Accordingly, the residue is accumulated in the residue separation tank, and only the wastewater from which the residue has been separated is accumulated in the wastewater storage tank. When the submersible pump is activated, the sewage accumulated in the sewage storage tank flows from the sewage inlet / outlet through the suction port of the submersible pump, the outlet of the submersible pump, and the solid-liquid separation mechanism into the slag separator. It is pumped from the outlet to the water pipe together with the residue accumulated in the separation tank.

  If the inlet and solid-liquid separation mechanism of the residue separation tank are temporarily blocked, or if there is an inflow of unknown water or a temporary planned sewage inflow, the sewage flowing from the inflow pipe overflows from the inflow tank. Overflow (inflow) directly into the sewage storage tank. If the overflowing sewage contains impurities or large scum, the large scum is sucked into the suction port when the submersible pump is operating, causing the submersible pump to be blocked. A screen with a structure in which a plurality of capture members are provided at intervals in the upper opening is arranged, so that large scale residue contained in sewage flowing through the upper opening from the inflow tank to the sewage storage tank is captured. It remains in the inflow tank by being captured by the member. As a result, even when sewage overflows, it is possible to reliably prevent overflow of a large slag into the sewage storage tank and prevent blockage of the submersible pump resulting therefrom.

  Specifically, the capturing member is a rod-shaped member or a plate-shaped member.

  It is preferable that the base end side of the capturing member is detachably attached to the side wall of the inflow tank.

  In this case, if the capture member is removed from the inflow tank, the large residue remaining in the inflow tank can be taken out, so that maintenance such as regular cleaning is easy.

  As an alternative, the base end side of the capturing member is attached to be rotatable with respect to the side wall portion of the inflow tank.

  In this case, if the capture member is rotated and retracted from the upper opening of the inflow tank, the large residue remaining in the inflow tank can be taken out, so that maintenance management such as regular cleaning is easy.

  It is preferable that the front end side of the capturing member extends obliquely downward from the upper opening of the inflow tank toward the inside of the inflow tank.

  If the tip of the catching member extends obliquely downward, the residue trapped by the catching member at the time of overflow will move toward the tip of the catching member by its own weight, and finally enter the inflow tank from the tip of the catching member. Fall. Moreover, the residue trapped by the trapping member simply moves to the screen (upper opening of the inflow tank) from above and moves toward the tip and falls into the inflow tank. Therefore, the maintenance management such as regular cleaning becomes easier by the configuration in which the tip of the capturing member extends obliquely downward.

  In the sewage relay pump facility of the present invention, by arranging a screen having a structure in which a plurality of capturing members are spaced apart from each other at the upper opening of the inflow tank, a large sized sewage storage tank can be formed even if overflow occurs. It is possible to reliably prevent the overflow of the residue and blockage of the submersible pump due to the overflow. Moreover, by making the capture member constituting the screen detachable or pivotable on the side wall of the inflow tank, the residue remaining in the inflow tank can be easily taken out, and maintenance management such as periodic cleaning is easy. is there. Furthermore, by adopting a configuration in which the tip of the capture member extends obliquely downward, the residue trapped by the capture member at the time of overflowing surely falls into the inflow tank, so that maintenance management such as periodic cleaning becomes easier. . As described above, according to the sewage relay pump facility of the present invention, it is possible to reliably prevent the overflow of the residue from the inflow tank to the sewage storage tank while ensuring the ease of maintenance.

  Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

(First embodiment)
1 to 7 show a manhole-type sewage relay pump facility 1 according to a first embodiment of the present invention.

  The sewage relay pump facility 1 sends sewage flowing from the upstream side through the inflow pipe 2 to the downstream side through the water supply pipe 3. The sewage relay pump facility 1 includes a sewage storage tank 4 that is buried in the ground. In the sewage storage tank 4, an inflow tank 5, residue separation tanks 6A, 6B, and 6C, and submersible pumps 7A and 7B that are sewage pumps. , 7C and separators 8A, 8B, 8C which are solid-liquid separation mechanisms are disposed. The controller 9 shown only in FIG. 2 controls the operation of the submersible pumps 7 </ b> A to 7 </ b> C based on inputs from the throw-in water level meter 10 and the float-type water level meter 11. In the building 12 provided on the ground surface, a suspension device 13 for carrying in and out the submersible pumps 7A to 7C is arranged via a carry-in / out port 4a at the top of the sewage storage tank 4.

  In the present embodiment, one inflow pipe 2 extends from the upstream side to the inside of the sewage storage tank 4, and one water supply pipe 3 extends from the inside of the sewage storage tank 4 to the downstream side. However, the number of inflow pipes 2 and water supply pipes 3 may be two or more.

  The inflow tank 5 will be described with reference to FIGS. The inflow tank 5 has a rectangular box shape as a whole, and includes a rectangular bottom plate (bottom portion) 15 in plan view and four side wall portions 16A, 16B, 16C, 16D extending upward from the bottom plate 15. The inflow tank 5 is disposed at the top of the residue separation tanks 6A to 6C. In the present embodiment, the bottom plate 15 of the inflow tank 5 functions as an upper lid of the residue separation tanks 6A to 6C. A plurality of side openings 16a having a vertically long slit shape having a width equal to or smaller than a foreign substance passage diameter of submersible pumps 7A to 7C described later are provided in upper portions of the side wall portions 16A to 16D. The side opening 16a is not limited to a slit shape, and may be a hole such as a rectangle. Further, an upper opening 17 having a rectangular shape in a plan view is provided in the upper part of the inflow tank 5. The opening end 2 a of the inflow pipe 2 extends from the upper opening 17 to the inside of the inflow tank 5. The opening end 2 a of the inflow pipe 2 is located above the bottom plate 15 of the inflow tank 5, and a space is provided between the opening end 2 a of each inflow pipe 2 and the bottom plate 15. A screen 100 is disposed in the upper opening 17 except for a portion where the inflow pipe 2 is disposed in a plan view.

  The screen 100 according to the present embodiment includes a pair of screen units 101A and 101B that are detachably mounted on the opposing side wall portions 16A and 16C of the inflow tank 5, respectively. Since the screen units 101A and 101B have the same structure, the screen unit 101A will be described below unless otherwise specified.

  The screen unit 101A includes an elongated base member 102 having an inverted U-shaped cross section placed on the upper end of the side wall portion 16A. The base member 102 is detachably fixed to the side wall portion 16A by a screwing mechanism 105 having a bolt 103 and a nut 104 shown only in FIG. 10 (the screwing mechanism 105 is at least two locations in the longitudinal direction of the base member 102). Is provided). The screen unit 101A (base member 102) can be removed from the side wall portion 16A by loosening the bolt 103 of the screwing mechanism 105. Conversely, the screen unit 101A (base member 102) can be fixed to the side wall portion 16A again by tightening the bolt 103 of the screwing mechanism 105 after the base member 102 once removed is placed on the upper end of the side wall portion 16A.

  The base member 102 is provided with a large number of capturing rods (capturing members) 106 at intervals. Referring to FIG. 10, the capture rod 106 has a base end portion 106 a fixed to the base member 102, a first intermediate portion 106 b that extends obliquely upward from the base end portion 106 a, and extends obliquely downward from the distal end of the first intermediate portion 106 b. The second intermediate portion 106c and the distal end portion 106d extending obliquely downward from the distal end of the second intermediate portion 106c are provided. The interval between the adjacent capture rods 106 is set so as to allow passage of sewage trying to overflow from the inflow tank 5 but not allow passage of relatively large scale residues that block the submersible pumps 7A to 7C. Has been. Specifically, the interval between adjacent capture rods 106 is set to be equal to or smaller than the foreign substance passage diameter of submersible pumps 7A to 7C described later.

  As shown in FIG. 11, in the portion where the opening end 2 a of the inflow pipe 2 passes through the upper opening 17 of the inflow tank 5, the length of the capture rod 106 is set shorter than the other portions so as not to interfere with the inflow pipe 2. Is set. The gap between the tip of the capture rod 106 and the outer periphery of the inflow pipe 2 at this portion is also set to be equal to or smaller than the foreign substance passage diameter of the submersible pumps 7A to 7C so as not to allow passage of large residue. The tips of the capture rods 106 of the pair of screen units 101A and 101B are alternately arranged in the extending direction of the side wall portions 16A and 16C. It is good also as arrangement | positioning which the front-end | tip of the capture rod 106 of a pair of screen unit 101A, 101B opposes mutually. The gap formed between the tips of the capture rods 106 of the pair of screen units 101A and 101B is also set to be equal to or smaller than the foreign substance passage diameter of the submersible pumps 7A to 7C so as not to allow passage of large scum.

  Next, the residue separation tanks 6A to 6C will be described. The residue separation tanks 6 </ b> A to 6 </ b> C are fixed to a pre-swirl tank 26 disposed at the bottom of the sewage storage tank 4. A configuration without the pre-swirl tank 26 is also possible. In addition, the screen residue separation tanks 6A to 6C are provided with an inflow port 27 communicating with the inside of the inflow tank 5 at the upper end thereof. As shown in FIG. 6, a disk 28 having an inlet 27 is fixed to the through hole 15 a of the bottom plate 15 of the inflow tank 5 so as to penetrate in the thickness direction.

  Referring to FIG. 6, balls 31 are accommodated inside the residue separation tanks 6 </ b> A to 6 </ b> C. The peripheral edge of the inlet 27 on the lower surface of the disk 28 (the inner surfaces of the residue separation tanks 6A to 6C) functions as a valve seat 32. If the ball 31 is detached from the valve seat 32, the inlet 27 is opened. If the ball 31 is seated on the valve seat 32, the inlet 27 is closed. The ball 31 and the valve seat 32 allow the inflow of sewage from the inflow pipe 2 into the residue separation tanks 6A to 6C, but prevent the backflow of sewage from the inside of the residue separation tanks 6A to 6C to the inflow pipe 2. Function as a backflow prevention mechanism. The flow path diameter D1 of the inlet 27 of the residue separation tanks 6A to 6C is set to be equal to or smaller than the flow path diameter D2 (see FIG. 2) of the outflow pipe 34 of the residue separation tanks 6A to 6C described later.

  One outflow pipe 34 that functions as an outlet is provided at the bottom of the residue separation tanks 6A to 6C. The outflow pipes 34 of the residue separation tanks 6A to 6C are connected to one ends of the corresponding water supply branch pipes 35A to 35C. The other ends of the water supply branch pipes 35 </ b> A to 35 </ b> C are connected to the water supply pipe 3. Further, a ball valve 36 and a check valve 37 are interposed in the water supply branch pipes 35A to 35C in order to prevent the backflow of sewage from the water supply pipe 3 to the residue separation tanks 6A to 6C. Further, a sewage inlet / outlet pipe 40 extending in the horizontal direction functioning as a sewage inlet / outlet is provided at the lower part of the residue separation tanks 6A to 6C. The discharge pipes 44 of the corresponding submersible pumps 7A to 7C are detachably connected to the sewage inlet / outlet pipe 40 via separators 8A to 8C.

  Next, the submersible pumps 7A to 7C will be described. The submersible pumps 7A to 7C include a pump main body 41 in which an involute chamber in which an impeller (not shown) is arranged is formed, and a submersible motor 42 for rotationally driving the impeller. The pump body 41 includes a suction pipe (suction port) 43 that extends downward. The end of the suction pipe 43 is located above the pre-swirl tank 26 and is open to the inside of the sewage storage tank 4. The pump main body 41 includes a discharge pipe (discharge port) 44 extending in the horizontal direction toward the residue separation tanks 6A to 6C. Referring to FIG. 7, solid-liquid separation screens 8 </ b> A to 8 </ b> C are bolted to the end of the discharge pipe 44. In the submersible pumps 7A to 7C, when stopped, the sewage flowing into the discharge pipe 44 from the residue separation tanks 6A to 6C flows back to the suction pipe 43 and is discharged from the suction pipe 43 into the sewage storage tank 4. There must be. In this specification, the minimum diameter of the flow path from the suction pipe 43 to the discharge pipe 44 of the submersible pumps 7A to 7C is referred to as a foreign substance passage diameter of the submersible pumps 8A to 8C.

  Referring to FIG. 7, the solid-liquid separation screens 8 </ b> A to 8 </ b> C include a flat rectangular parallelepiped block 47 as a whole. A flow path 47 a penetrating the block 47 is formed. This flow path 47a has a left end in the figure communicating with a flow path 40a in the sewage inlet / outlet pipe 40 of the residue separation tanks 6A to 6C, and a right end in the figure is in the discharge pipe 44 of the submersible pumps 7A to 7C. The flow path 44a is in communication. A plurality of screen rods 48 are arranged in the flow path 47a of the solid-liquid separation screens 8A to 8C. The circular area surrounded by the tips of the screen rods 48 and the gaps between the adjacent screen rods 48 are set to be equal to or smaller than the foreign substance passage diameters of the submersible pumps 7A to 7C.

  The suction pipe 43 of the submersible pumps 7A to 7C and the sewage inlet / outlet pipe 40 of the residue separation tanks 6A to 6C are detachably connected, and the submersible pumps 7A to 7C are moved up and down along the guide rod 58 by the suspension device 13 described above. It can be taken in and out from the sewage storage tank 4 by making it.

  Next, with reference to FIG. 13A to FIG. 13D further, operation | movement of the sewage relay pump equipment 1 of 1st Embodiment is demonstrated. Normally, if one of the submersible pumps 7A to 7C is in an operating state, the other is in a stopped state, and the sewage from the inflow pipe 2 enters the residue separation tanks 6A to 6C corresponding to the submerged pumps 7A to 7C in the stopped state. Inflow is possible. In the following description, the description will be given focusing on the submersible pump 7A and the corresponding residue separation tank 6A unless otherwise specified.

  As shown in FIG. 13A, sewage containing debris flows into the inflow tank 5 from the inflow pipe 2. The sewage that has flowed into the inflow tank 5 flows into the residue separation tank 6 </ b> A from the inlet 27 that opens to the bottom plate 15 of the inflow tank 5.

  As described above, the flow path diameter D1 of the inlet 27 of the residue separation tank 6A is set to be equal to or smaller than the flow path diameter D2 of the flow path of the outflow pipe 34 of the residue separation tank 6A. Accordingly, large slag that cannot pass through the outflow pipe 34 does not flow into the slag separation tank 6A from the inlet 27 but remains on the bottom plate 15 of the inflow tank 5 to block the spillage pipe 34 of the slag separation tank 6A. Can be prevented.

  When the inlet 27 and the solid-liquid separation screen 8A of the residue separation tank 6A are temporarily blocked, if there is an inflow of unknown water or a temporary planned sewage inflow amount, the sewage flowing from the inflow pipe 2 will flow into the inflow tank. Direct overflow (inflow) from 5 to the sewage storage tank 4. Specifically, sewage overflows from the side openings 16 a of the side walls 16 </ b> A to 16 </ b> D of the inflow tank 5 and overflows into the sewage storage tank 4. If the overflowing sewage contains impurities or large scale residue, the large scale residue may be sucked into the suction port when the submersible pump 7A is operated, which may cause blockage. However, since the side openings 16a of the side walls 16A to 16D are set to be equal to or smaller than the foreign matter passage diameter of the submersible pump 7A, a large scale residue larger than the foreign matter passage diameter contained in the sewage is formed in the side opening 16a. Cannot pass through, and remains in the inflow tank 5. Therefore, even when overflow of sewage occurs, it is possible to prevent the large scale residue from flowing into the manhole 4 and to prevent the submersible pump 7A from being blocked due to the overflow.

  If the side walls 16A to 16D of the inflow tank 5 are clogged, the inlet of the residue separation tank or the solid-liquid separation mechanism may be temporarily blocked, or the amount of unknown water or more than the temporary planned sewage inflow amount may be exceeded. When there is an inflow, overflow occurs from the upper opening 17 of the inflow tank 5. However, since the screen 100 having a structure in which a plurality of trapping rods 106 are arranged at intervals equal to or smaller than the foreign substance passage diameter is arranged in the upper opening 17, it flows from the inflow tank to the sewage storage tank through the upper opening 17. A large scale residue contained in the sewage remains in the inflow tank 5 by being captured by the capture rod 106. That is, even if the side walls 16A to 16D of the inflow tank 5 are clogged, the overflow of the large scale residue into the sewage storage tank 4 is surely prevented at the time of overflow, and the blockage of the submersible pump 7A resulting therefrom Can be prevented. Further, since the second intermediate portion 106c and the tip end portion 106d of the trapping rod 106 extend obliquely downward, the residue trapped by the trapping rod 106 at the time of overflowing moves toward the tip of the trapping rod 106 by its own weight, Finally, it falls into the inflow tank 5 from the tip of the capture rod 106. Therefore, clogging due to screen residue is less likely to occur.

  As shown in FIGS. 13B and 13C, the sewage flowing into the residue separation tank 6A further flows from the sewage inlet / outlet pipe 40 into the discharge pipe 44 of the stopped submersible pump 7A via the solid-liquid separation screen 8A. The inside of the pump 7 </ b> A flows backward and is discharged from the suction pipe 43 into the sewage storage tank 4. Since the screen residue is separated by the screen rod 48 when passing through the flow path 47a of the solid-liquid separation screen 8A, the residue is accumulated in the residue separation tank 6A, and the sewage from which the residue has been separated is sewage Accumulated in the storage tank 4. On the other hand, the sewage itself flows to the discharge pipe 44 of the submersible pump 7A.

  When the water level gauges 10 and 11 detect that the inside of the sewage storage tank 4 has reached a predetermined water level, the controller 9 starts the submersible pump 7A. As shown in FIG. 13D, when the submersible pump 7 </ b> A operates, the sewage in the sewage storage tank 4 is sucked from the suction pipe 43 and discharged from the discharge pipe 44. The sewage discharged by the submersible pump 7A passes through the solid-liquid separation screen 8A and is pumped from the sewage inlet / outlet pipe 40 into the residue separation tank 6A. The residue accumulated in the residue separation tank 6A is sent to the water supply pipe 3 through the outflow pipe 34 together with the sewage pumped from the submersible pump 7A. The inlet 27 connecting the residue separating tank 6A and the inflow tank 5 is closed by the ball 31 seated on the valve seat 32. Therefore, the sewage does not flow backward from the residue separating tank 6A to the inflow tank 5.

  The screen units 101A and 101B constituting the screen 100 can be detached from the side wall portions 16A and 16C of the inflow tank 5 only by loosening the screwing mechanism 105. If each screen unit 101A, 101B which comprises the screen 100 is removed from the inflow tank 5, the upper opening 17 of the inflow tank 5 is in an obstacle-free state (completely open state) except for the portion where the inflow pipe 2 is disposed. Therefore, the residue in the inflow tank 5 can be easily taken out and discarded during regular cleaning. In this respect, maintenance is easy. Further, since the second intermediate portion 106c and the tip end portion 106d of the capture rod 106 of the screen 100 extend obliquely downward, the capture rod can be simply applied to the clean 100 (the upper opening 17 of the inflow tank 5) from above. The residue captured at 106 moves toward the tip and falls into the inflow tank 5. In this respect, maintenance such as regular cleaning is easy.

  12A and 12B show an alternative to the capture rod 106. FIG. In these alternatives, the first intermediate portion 106c (see FIG. 10) is omitted. In FIG. 12A, the upper part of the capture rod 106 protrudes greatly from the upper end of the inflow tank 5, whereas the most part of the capture rod 106 is accommodated in the inflow tank 5 in FIG. 12B.

(Second Embodiment)
The second embodiment of the present invention shown in FIGS. 14 to 17 is different from the first embodiment only in the configuration of the screen 200 arranged in the upper opening 17 of the inflow tank 5. Other configurations of the sewage relay pump facility 1 are the same as those in the first embodiment described with reference to FIGS. 1 to 7. The screen 200 of the present embodiment includes a capture plate 201 instead of the capture rod 106 of the first embodiment, and the capture plate 201 is attached to the side wall portions 16A and 16C of the inflow tank 5 so as to be rotatable.

  A pair of screen units 202A and 202B corresponding to the side wall portions 16A and 16C of the inflow tank 5 are supported at both ends by common support plates 203A and 203B fixed to the side wall portions 16B and 16D of the inflow tank 5, respectively. . Since these screen units 202A and 202B have the same structure, the screen unit 202A will be described below unless otherwise specified.

  Referring to FIG. 17, the screen unit 202A includes a shaft rod 204 having male screw portions 204a formed at both ends, and a pipe 205 into which the shaft rod 204 is inserted. A capture plate 201 is fixed to the pipe 205 at an interval. The male thread portion 204a of the shaft rod 204 is inserted into a support hole 203a provided in the support plates 203A and 203B, and a washer 206 and nuts 207A and 207B that require clearance adjustment are provided. As will be described in detail later, the pipe 205 to which the capture plate 201 is fixed can rotate around the shaft rod 204.

  Referring to FIG. 15, the overall shape of the capture plate 201 is a claw shape close to a shape in which an isosceles triangle is laid down. Specifically, the capture plate 201 has a base end-side upper portion fixed to the pipe 205 and a locking portion 201a extending downward from the base end-side upper portion. The capture plate 201 includes an upper arcuate portion 201b and a lower arcuate portion 201c that extend obliquely downward from the base end side.

  As shown in FIG. 16, in the portion where the opening end 2 a of the inflow pipe 2 passes through the upper opening 17 of the inflow tank 5, the length of the capture plate 201 is set shorter than the other portions so as not to interfere with the inflow pipe 2. Is set. The gap between the tip of the capture plate 201 and the outer periphery of the inflow pipe 2 at this portion is also set to be equal to or smaller than the foreign substance passage diameter of the submersible pumps 7A to 7C so as not to allow passage of large residue. The front ends of the capture plates 201 of the pair of screen units 202A and 202B are alternately arranged in the extending direction of the side walls 6A and 6C. It is good also as arrangement | positioning which the front-end | tip of the capture plate 201 of a pair of screen unit 202A, 202B opposes mutually. The gap formed between the tips of the capture plates 201 of the pair of screen units 202A and 202B is also set to be equal to or smaller than the foreign substance passing diameter of the submersible pumps 7A to 7C so as not to allow passage of large scum.

  If the side walls 16A to 16D of the inflow tank 5 are clogged, the inlet of the residue separation tank or the solid-liquid separation mechanism may be temporarily blocked, or the amount of unknown water or more than the temporary planned sewage inflow amount may be exceeded. When there is an inflow, overflow occurs from the upper opening 17 of the inflow tank 5. However, since the screen 200 having a structure in which a plurality of trapping plates 201 are arranged at intervals equal to or smaller than the foreign substance passage diameter is disposed in the upper opening 17, it overflows from the inflow tank to the sewage storage tank through the upper opening 17. The large scale residue contained in the sewage remains in the inflow tank 5 by being captured by the capture plate 201. That is, even if the side wall portions 16A to 16D of the inflow tank 5 are clogged, the overflow of the large scale residue into the sewage storage tank 4 is surely prevented during overflow, and the submersible pumps 7A to 7C resulting therefrom. Can be blocked. In addition, since the entire catch plate 201 including the upper arc-shaped portion 201b and the lower arc-shaped portion 201c extends diagonally downward including the tip, the residue captured by the catch plate 201 at the time of overflow is It moves toward the front end of the capture plate 201 by its own weight, and finally falls into the inflow tank 5 from the front end of the capture plate 201. Accordingly, clogging due to screen residue is less likely to occur.

  Since the locking part 201a is locked to the side wall part 16A, the capture plate 201 is prevented from rotating around the arrow A1. However, the pipe 205 and the capture plate 201 can be rotated around the arrow A2. The capture plate 201 can be retracted from the upper opening 17 of the inflow tank 5 by the rotation around the arrow A2. If the capture plate 201 is withdrawn from the upper opening, the upper opening 17 of the inflow tank 5 becomes free of obstacles (completely open state) except for the portion where the inflow pipe 2 is disposed. In such a case, the residue in the inflow tank 5 can be easily taken out and discarded. In this respect, maintenance is easy. In addition, the capture plate 201 includes an upper arc-shaped portion 201b and a lower arc-shaped portion 201c, and almost the whole including the tip extends obliquely downward, so that the capture plate 201 is directed upward toward the screen 200 (the upper opening 17 of the inflow tank 5). The scum captured by the capture plate 201 simply by spilling water from the slag moves toward the tip and falls into the inflow tank 5. In this respect, maintenance such as regular cleaning is easy.

  18A and 18B show an alternative to the capture plate 201. FIG. In these alternatives, the width between the upper arc-shaped portion 201b and the lower arc-shaped portion 201c is significantly narrowed to form an elongated claw shape. In FIG. 18A, it is fixed to the pipe 205 so as to penetrate the vicinity of the upper end of the locking part 201a, but in FIG. 18B, the capture plate 201 is fixed to the upper part of the pipe 205.

  The present invention is not limited to the above-described embodiment, and various modifications are possible. For example, when the screen 200 (screen units 202A and 202B) is detachable from the inflow tank 5 as in the first embodiment, the capture plate 201 of the second embodiment is used instead of the capture rod 106. May be. Further, when the screen 200 is configured to be movable relative to the side walls 16A and 16C of the inflow tank 5 as in the second embodiment, the capture rod 106 of the first embodiment is employed instead of the capture plate 201. May be.

The longitudinal cross-sectional view of the sewage relay pump equipment which concerns on 1st Embodiment of this invention. Sectional drawing in the II-II line of FIG. Sectional drawing in the III-III line of FIG. Sectional drawing in the IV-IV line of FIG. Sectional drawing in the VV line | wire of FIG. The enlarged view of the part VI of FIG. The expanded sectional view of the part VII of FIG. The partial perspective view of the inflow tank and screen in 1st Embodiment. The side view of the inflow tank and screen in 1st Embodiment. The elements on larger scale of FIG. The partial top view of the inflow tank and screen in 1st Embodiment. The elements on larger scale which show the alternative of the screen of 1st Embodiment. The elements on larger scale which show the other alternative of the screen of 2nd Embodiment. The schematic sectional drawing which shows the state at the time of the inflow start of the sewage to a residue separation tank. The schematic sectional drawing which shows the state in inflow of the sewage to a residue separation tank. The schematic sectional drawing which shows the state with which the residue separation tank was filled with dirty water. The schematic sectional drawing which shows the state which sewage in a sewage storage tank with a submersible pump, and pumps it through a residue separation tank. The fragmentary perspective view of the inflow tank and screen in 2nd Embodiment. The side view of the inflow tank and screen in 2nd Embodiment. The partial top view of the inflow tank and screen in 2nd Embodiment. The enlarged view of the part XVII of FIG. The elements on larger scale which show the alternative of the screen of 2nd Embodiment. The elements on larger scale which show the other alternative of the screen of 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wastewater relay pump equipment 2 Inflow pipe 2a Open end 3 Water supply pipe 4 Sewage storage tank 4a Carry-in / out port 5 Inflow tank 6A, 6B, 6C Sediment separation tank 7A, 7B, 7C Submersible pump 8A, 8B, 8C Separator 9 Controller 10 Throw Built-in water level meter 11 Float type water level meter 12 Building 13 Suspension device 15 Bottom plate 15a Through hole 16A, 16B, 16C, 16D Side wall portion 16a Side opening 17 Top opening 26 Pre-rotation tank 27 Inlet 28 Disc 31 Ball 32 Valve Seat 34 Outflow pipe 35A, 35B, 35C Water supply branch pipe 36 Ball valve 37 Check valve 40 Sewage inlet / outlet pipe 40a Channel 41 Pump body 42 Submersible motor 43 Suction pipe 44 Discharge pipe 44a Channel 47 Block 47a Channel 48 Screen rod 58 Guide Rod 100 screen 101A, 101B screen uni G 102 Base member 103 Bolt 104 Nut 105 Screwing mechanism 106 Capture rod 106a Base end portion 106b First intermediate portion 106c Second intermediate portion 106d Tip portion 200 Screen 201 Capture plate 201a Locking portion 201b Upper arcuate portion 201c Lower circle Arc-shaped portion 202A, 202B Screen unit 203A, 203B Support plate 203a Support hole 204 Shaft rod 204a Male thread portion 205 Pipe 206 Washer 207A, 207B Nut

Claims (5)

A sewage relay pump facility for feeding sewage flowing from the upstream side through the inflow pipe to the downstream side through the water supply pipe,
A wastewater storage tank in which the inflow pipe and the water supply pipe extend to the inside;
An inflow tank disposed in the sewage storage tank, having a bottom part and a side wall part and having an upper opening, wherein an opening end of the inflow pipe is disposed in the upper opening, and sewage flows into the inside from the inflow pipe; ,
Except for the portion where the inflow pipe is arranged in plan view, the screen is arranged in the upper opening of the inflow tank, and a plurality of capturing members are arranged at intervals,
An inflow port disposed below the inflow tank in the sewage storage tank and opened to the bottom of the inflow tank, and inflow of sewage from the inflow port is allowed, but outflow of sewage from the inflow port is prevented. A backflow prevention mechanism, an outlet connected to the water pipe, and a sewage inlet / outlet, and a residue separation tank,
It is arranged in the sewage storage tank, and the discharge port is connected to the sewage inlet / outlet of the residue separation tank, while the suction port is opened in the sewage storage tank, and the sewage from the discharge port to the suction port when stopped A submersible pump that allows backflow,
It is interposed between the sewage inlet / outlet of the slag separation tank and the discharge port of the submersible pump, separates sewage sewage from sewage flowing from the sewage inlet / outlet to the discharge port, and from the discharge port to the sewage A sewage relay pump facility equipped with a solid-liquid separation mechanism that allows the flow of sewage to the doorway.   The sewage relay pump facility according to claim 1, wherein the capturing member of the screen is a rod-shaped member or a plate-shaped member.   The sewage relay pump facility according to claim 1 or 2, wherein a base end side of the capturing member is detachably attached to a side wall of the inflow tank.   The sewage relay pump facility according to claim 1 or 2, wherein a base end side of the capturing member is rotatably attached to a side wall portion of the inflow tank.   The sewage relay pump facility according to any one of claims 1 to 4, wherein a leading end side of the catching member extends obliquely downward from the upper opening of the inflow tank toward the inside of the inflow tank.

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