JP4028839B2 - Sewage relay pump equipment - Google Patents

Description

  The present invention relates to a sewage relay pump facility for sending sewage in a sewer. In particular, the present invention relates to a sewage relay pump facility suitable for relatively small-scale sewage relay for pumping miscellaneous wastewater from one or several houses to a sewer main.

  Various sewage submersible pumps are used in a sewage relay pump facility for sending sewage in a sewer. As this type of submersible pump, for example, a non-clog type, a vortex type, a suction screw type, and a grinder type are known. The non-clog type is a submersible pump for sewage with a structure that prevents clogging of contaminants by securing a water flow area. The vortex flow type ensures a larger water flow area than the non-clog type by pumping sewage with vortex flow. The suction screw type has a single spiral blade and achieves higher efficiency than the non-clog type while ensuring a water passage area. In addition, the grinder type is provided with a crushing mechanism for impurities in the suction portion. (For example, see Non-Patent Document 1 and Non-Patent Document 2.)

  In addition to relatively large-scale facilities such as manholes, sewage relay pump facilities include small-scale facilities (so-called residential land use) for pumping miscellaneous wastewater from one or several houses to the sewer main. There is a sewage pump facility. The diameter of a general house drainage facility is around 50 mm, and the submersible pump of the sewage relay pump facility for residential land that relays sewage from the drainage facility is required to have a foreign substance passage diameter of 35 mm or more. . In addition, from the viewpoint of energy saving and running cost reduction, it is also required to reduce power consumption by using a low-power underwater motor. Furthermore, since the sewage relay pump equipment for residential land is installed in the residential land of ordinary households, it is required to make the equipment as small as possible.

  However, the sewage relay facility equipped with the above-described submersible pump cannot satisfy all of these requirements. First, since the foreign substance passage diameter of the non-clog type, vortex type, and suction screw type submersible pumps is about 40 to 50% of the pump diameter, the pump diameter is about 65 to 80 mm to achieve a foreign substance passage diameter of 35 mm. Need to be. Due to this relatively large pump diameter, the equipment cannot be miniaturized. In addition, non-clog type submersible pumps have a large water flow area, so that hydraulic efficiency is low and it is necessary to use a high-power submersible motor. For example, the vortex-type hydraulic efficiency is about 20 to 30%. Next, in the case of the grinder type, the crushing mechanism is provided, so the foreign substance passage diameter is not a problem, but since the crushing mechanism needs to be driven, the grinder type has lower hydraulic efficiency and higher output than the non-clog type etc. Submersible motor is required. Specifically, the output of the submersible motor needs to be at least about 1.0 kW.

In addition to the above-mentioned requirements, it is also important that maintenance management is easy in the sewage relay pump facility for residential land.
Agricultural village drainage business standards, etc. National Review Committee, “Agricultural village drainage facility design guidelines (2002 revised version) Sewerage New Technology Promotion Organization, “Sewer Manhole Pump Facility Technical Manual”, June 1997, p16-18

  In view of the problems in the conventional sewage relay pump facility, it is an object of the present invention to provide a sewage relay pump facility that is small in size, low in power consumption, and easy to maintain while ensuring a sufficient foreign substance passage diameter. .

  A first invention is a sewage relay pump facility for feeding sewage flowing from an upstream side through an inflow pipe to a downstream side through a water supply pipe, and communicates with the opening end of the inflow pipe and the water supply pipe A sewage storage tank comprising a storage tank main body and a lid for closing the upper opening of the storage tank main body so as to be openable and closable; an inflow port through which the sewage flows from the inflow pipe; And an outlet for discharging sewage to the water supply pipe, and a backflow prevention mechanism for allowing the inflow of sewage from the inflow pipe to the inflow port but preventing the backflow of sewage from the inflow pipe to the inflow pipe. A separation tank, and a first connection mechanism that removably connects one of the inlet of the residue separation tank and the opening end of the inflow pipe, and the outlet of the residue separation tank and the opening end of the water supply pipe. , The inlet of the residue separation tank, the open end of the inlet pipe, and the residue A flexible pipe member connecting the other of the outlet of the separation tank and the opening end of the water pipe, and at least longer than the inlet or the distance from the outlet to the upper opening of the sewage storage tank, and the sewage A discharge port that is disposed in the storage tank and opens into the residue separation tank, a suction port that opens into the wastewater storage tank, a pump body having an impeller, and a submersible pump that rotationally drives the impeller. And a submersible pump fixed to the slag separation tank, which permits the backflow of sewage from the discharge port to the suction port when stopped, and flows from the slag separation tank into the discharge port of the submersible pump. Provided is a sewage relay pump facility comprising a solid-liquid separator that separates sewage residue from sewage and permits the flow of sewage from the discharge port into the residue separation tank.

  The second 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, and communicates with the open end of the inflow pipe and the water supply pipe A sewage storage tank comprising a storage tank main body and a lid for closing the upper opening of the storage tank main body so as to be openable and closable; an inflow port through which the sewage flows from the inflow pipe; And an outlet for discharging sewage to the water supply pipe, and a backflow prevention mechanism for allowing the inflow of sewage from the inflow pipe to the inflow port but preventing the backflow of sewage from the inflow pipe to the inflow pipe. A separation tank, and a first connection mechanism that removably connects one of the inlet of the residue separation tank and the opening end of the inflow pipe, and the outlet of the residue separation tank and the opening end of the water supply pipe. , The inlet of the residue separation tank, the open end of the inlet pipe, and the residue A second connection mechanism that removably connects the outlet of the separation tank and the opening end of the water pipe; a discharge port that is disposed in the wastewater storage tank and opens in the residue separation tank; A suction port that opens in the sewage storage tank, a pump body having an impeller, and a submersible pump that rotationally drives the impeller, and permits the backflow of sewage from the discharge port to the suction port when stopped, A submersible pump fixed to the residue separation tank, and waste residue separated from the wastewater flowing into the discharge port of the underwater pump from the residue separation tank, and from the discharge port into the residue separation tank. A sewage relay pump facility comprising a solid-liquid separator that permits the flow of sewage is provided.

  In the sewage relay pump facility according to the first and second inventions, the sewage flowing into the residue separation tank from the inflow pipe when the submersible pump is stopped flows into the solid-liquid separator, the submersible pump discharge port, and the submersible pump suction port. Then, it flows into the sewage storage tank, and the sewage from which the residue has been separated by the solid-liquid separator is stored in the sewage storage tank. Further, the residue separated from the sewage by the solid-liquid separator is accumulated in the residue separation tank. During operation of the submersible pump, the sewage accumulated in the sewage storage tank flows from the suction port of the submersible pump into the residue separation tank through the discharge port of the submersible pump and the solid-liquid separator, and into the residue separation tank. The accumulated residue is sent from the outlet to the water pipe. As described above, the sewage relay pump facility according to the first and second inventions is a so-called solid separation type in which the residue does not flow into the submersible pump itself. Therefore, while ensuring a sufficient foreign substance passage diameter as the sewage relay pump facility, And a submersible pump with a submersible motor having a relatively low output can be used. For example, a submersible pump having a pump diameter of about 40 mm and a submersible motor output of about 0.4 kW can be used. By using a submersible pump with a small pump diameter, the equipment can be downsized, and by using a low-power submersible motor, power consumption can be reduced. Also, the facility can be downsized by arranging the residue separation tank and the submersible pump in the sewage storage tank. Therefore, the sewage relay pump equipment of the first and second inventions is particularly suitable for use in residential land.

  In the first invention, the submersible pump is fixed to the residue separation tank. In addition, the first connection mechanism can release the connection between one of the inlet and the outlet of the residue separation tank and the inflow pipe or the water supply pipe. Furthermore, the other of the inflow port and the outflow port of the residue separation tank and the inflow pipe or the water supply pipe are connected by a sufficiently long flexible pipe member. Therefore, if the lid is opened, the residue separation tank and the submersible pump can be taken out from the storage tank main body of the sewage storage tank through the upper opening, and maintenance is easy. Moreover, it is not necessary to provide a work space in the sewage storage tank, and the equipment can be further downsized.

  In the second invention, the submersible pump is fixed to the residue separation tank. Further, the connection between the inlet and the inlet pipe of the residue separation tank and the connection between the outlet and the water supply pipe of the residue separation tank can be released by the first and second connection mechanisms. Therefore, similarly to the first invention, the residue separation tank and the submersible pump can be taken out from the storage tank body of the sewage storage tank.

  For example, the first connection mechanism connects the inlet of the sewage storage tank and the open end of the inflow pipe. In this case, one end of the first connection mechanism is connected to the inflow pipe side and extends into the sewage storage tank, the other end of the first connection pipe, and the first connection mechanism A first fluid coupling that removably connects the inlet of the residue separation tank. Since the first connecting pipe has flexibility, if the first fluid coupling is operated, the connection of the inlet of the residue separation tank can be easily released as the first connecting pipe.

  Specifically, the opening end of the inflow pipe opens to the side wall of the sewage storage tank, and the first connection mechanism is provided on the inner surface of the side wall of the sewage storage tank at a position corresponding to the opening end of the inflow pipe. And a holding portion that forms a guide groove between the side wall inner surface of the sewage storage tank and a guide groove that is slidable in the guide groove and capable of holding its own position, and is formed side by side in the sliding direction. A sliding plate portion having a through hole and an inflow restricting portion, and a cylinder having both ends opened from the sliding plate portion so that one end communicates with the through hole and the other end connected to the first connecting pipe. And an inflow control member having a shape portion. Normally, the sliding plate portion of the inflow restricting member is set at the first position where the through hole communicates with the open end of the inflow pipe. At the time of taking out the residue separating tank and the submersible pump, after releasing the connection of the inlet of the residue separating tank as the first connecting pipe, the inflow restricting portion of the sliding plate portion corresponds to the opening end of the inflow officer. An inflow restricting member is set at the position.

  The inflow restricting portion includes, for example, a closed surface. In this case, when the inflow control member is set at the second position, the inflow of sewage from the open end of the inflow pipe is blocked.

  The inflow restricting portion may include a slit. In this case, when the inflow control member is set to the second position, the sewage from which the residue has been separated by the slit flows into the storage device from the open end of the inflow pipe.

  The second connecting mechanism connects the outlet of the residue separation tank and the open end of the water supply pipe. In this case, one end of the second connection mechanism is connected to the water supply pipe, and the second connection mechanism is provided at the other end of the second connection pipe and the flexible second connection pipe extending in the sewage storage tank. And a second fluid coupling for detachably connecting the second connecting pipe and the outlet of the residue separation tank. Since the second connection pipe is flexible, the connection between the outlet and the water supply pipe can be easily released by operating the second fluid coupling. In addition, the fluid coupling does not interfere when removing the residue separation tank and submersible pump from the sewage storage tank.

  In the submersible pump, a portion including the discharge port of the pump body and the submersible motor are arranged in the residue separation tank, and a portion including the suction port of the pump body is provided from the bottom of the residue separation tank. It protrudes into the sewage storage tank. Since most of the submersible pump is built in the residue separation tank, the size of the unit comprising the residue separation tank and the underwater pump can be reduced, and this unit can be easily taken out from the sewage storage tank.

  In the submersible pump, a portion of the pump body including the discharge port is disposed in the residue separating tank, and a portion of the pump body including the suction port and the submersible motor are disposed outside the residue separating tank. It may be arranged. Since most of the submersible pump is arranged outside the slag separation tank, the submersible pump can be easily accessed by removing the sewage separation tank and the submersible pump from the sewage storage tank.

  The residue separation tank includes a separation tank main body having an upper opening, and a lid part that is detachably attached to the separation tank main body to close the opening and includes the inflow port and the outflow port. By removing the lid from the main body, it is possible to easily perform operations such as removal of earth and sand accumulated in the residue separation tank.

  The residue separation tank preferably includes a window portion having a function of visually recognizing the inside from the outside. By providing the window portion, the state inside the residue separation tank can be easily confirmed when the window is taken out from the sewage storage tank.

  It is preferable that the residue separating tank is provided with a handle for taking out the residue separating tank and the submersible pump from the wastewater storage tank.

  An overflow opening formed in an upper part of the residue separation tank, and a sewage residue attached to the overflow opening and overflowing from the residue separation tank to the waste water storage tank through the overflow opening. It is preferable to provide a screen member for separating the screen. When a large amount of sewage suddenly flows into the residue separation tank from the inflow pipe, the sewage overflows into the sewage storage tank through the overflow opening. In the sewage storage tank, the sewage from which the residue is separated by the screen member overflows, so that the submersible pump can be prevented from being blocked.

  It is preferable to provide an opening adjustment mechanism for adjusting the opening of the screen member. When a large amount of sewage suddenly flows from the inflow pipe and flows into the residue separation tank, the flow rate of the sewage overflowing into the sewage storage tank can be adjusted. The opening degree adjusting mechanism includes, for example, a female screw portion provided on the peripheral wall of the overflow opening portion and a male screw portion provided on the outer periphery of the screen member screwed into the female screw portion. The opening degree of the screen member can be adjusted by adjusting the amount of screwing the screen member into the overflow opening.

  The sewage relay pump facility according to the first and second inventions is a so-called solid separation type in which the residue does not flow into the submersible pump itself, and the residue separation tank and the submersible pump are accommodated in the sewage storage tank. It is possible to reduce the size of the equipment and reduce the power consumption while securing the foreign substance passage diameter. In the sewage relay pump facility according to the first aspect of the present invention, if the connection between the inlet and the outlet of the residue separation tank and the inflow pipe or the water supply pipe is released by the first connection mechanism, The residue separation tank and submersible pump can be taken out. Therefore, it is easy to maintain and manage, and the equipment can be further downsized. In the sewage relay pump facility according to the second aspect of the invention, if the connection between the inlet and outlet of the residue separation tank and the inflow pipe and the water supply pipe is released by the first and second connection mechanisms, the residue from the wastewater storage tank is removed. Separation tank and submersible pump can be taken out. Therefore, it is easy to maintain and manage, and the equipment can be made smaller.

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

(First embodiment)
FIGS. 1-11 has shown the sewage relay pump equipment 1 for arrangement | positioning in the residential land concerning 1st Embodiment of this invention.

  This sewage relay pump facility 1 is installed in, for example, a residential land of a general household, for example, a wastewater or sewage flowing from one or more houses through an inflow pipe 2 from the upstream side, for example, a downstream which is a sewer main. Water is fed to the side through the water pipe 3.

  Referring to FIGS. 1 to 3, the sewage relay pump facility 1 includes a sewage tank (sewage storage tank) 4 buried in the ground, and within the sewage tank 4, a residue separation tank 5, a submersible pump 6, a solid-liquid separation. A strainer 7 as a container is provided. As shown in FIG. 15, the strainer 7 includes a plurality of rods 7 a extending from the discharge port 6 c of the submersible pump 6, and the interval between the adjacent rods 7 a is set such that no residue passes. A separation valve may be employed as the solid-liquid separator. As will be described in detail later, the residue separating tank 5 and the submersible pump 6 can be taken out from the sewage tank 4. The controller 8 controls the operation of the submersible pump 6 based on the input from the water level gauge 9. The type of the water level meter 9 is not particularly limited, such as a throwing type or a float type.

  The sewage tank 4 includes a tank main body (storage tank main body) 4a embedded in the ground and a tank lid 4c that closes an upper opening 4b of the tank main body 4a that is open to the ground surface in an openable and closable manner. The side wall 4 d of the tank body 4 a communicates with the inflow pipe 2 and the open ends 2 a and 3 a of the water supply pipe 3.

  The residue separation tank 5 is disposed at the bottom of the sewage tank 4. The residue separation tank 5 includes a separation tank body 5a having an open top, and a separation tank lid 5b that is detachably attached to the separation tank body 5a and closes the opening. Specifically, the separation tank lid 5b is attached to the separation tank main body 5a by fixing flanges formed at the upper end of the separation tank main body 5a and the lower end of the separation tank lid 5b with bolts.

  The separation tank main body 5a has a cylindrical shape as a whole, and includes a window portion 11 in which an opening formed in a side wall is sealed in a sealed state with a transparent member. A support 12 is fixed to the outside of the bottom of the separation tank body 5a. The bottom separation tank 5 is held by the support 12 in a state where the bottom of the bottom separation tank 5 floats from the bottom of the sewage tank 4.

  The separation tank lid 5b includes a large-diameter cylindrical portion 5c having substantially the same diameter as the separation tank main body 5a on the lower end side. A flange is provided at the lower end of the large-diameter cylindrical portion 5c. On the other hand, the upper end of the large-diameter cylindrical portion 5c is provided with a conical portion 5d that gradually decreases in diameter upward. In addition, a small-diameter cylindrical portion 5e whose diameter is significantly smaller than that of the large-diameter cylindrical portion 5c extends upward in the vertical direction at the top of the conical portion 5d (the central portion of the conical portion 5d in plan view). Further, an inflow side cap portion 5f is provided which branches from the small diameter cylindrical portion 5e and extends in the horizontal direction (rightward in the figure). The front end opening of the inflow side cap portion 5f constitutes the inflow port 5g.

  A ball 13 as a valve body is accommodated in the residue separation tank 5. A connecting portion between the conical portion 5d and the small diameter cylindrical portion 5e of the separation tank lid 5b constitutes a valve seat 14 on which the ball 13 is seated. The ball 13 and the valve seat 14 permit the inflow of sewage from the inflow pipe 2 to the inflow port 5g into the residue separation tank 5, but prevent the backflow from blocking the sewage from the inflow port 5g to the inflow pipe 2. Acts as a mechanism.

  Referring also to FIG. 4, an overflow opening 5h is formed at the tip of the small diameter cylindrical portion 5e. A screen member 16 is attached to the overflow opening 5h. 6 (A) and 6 (B), the screen member 16 has a cylindrical portion 16a having openings at both ends, and a plurality of rods 16b having a circular cross section projecting from each other at the upper end surface of the cylindrical portion 16a. A top plate 16c fixed to the upper ends of the rods 16b and a semi-annular handle 16d attached to the top surface of the top plate 16c are provided. A slit 16e is formed between the rods 16b. A male screw portion 16f is formed on the outer periphery of the cylindrical portion 16a. An internal thread 5i is formed on the peripheral wall of the overflow opening 5h. The screen member 16 is fixed to the overflow opening 5h by screwing the male screw portion 16f into the female screw portion 5i. Further, the opening degree of the screen member can be adjusted by adjusting the amount of screwing the screen member 16 into the overflow opening 5h. In addition, as shown to FIG. 7 (A), (B), the cross-sectional shape of a rod may be a rectangle.

  An outflow side cap portion 5j extending vertically upward from the conical portion 5d is provided along with the small diameter cylindrical portion 5e. The front end opening of the outflow side cap portion 5j constitutes the outflow port 5k. An outflow side backflow prevention valve 17 is interposed between the outflow side cap portion 5j and the conical portion 5d. The outflow side backflow prevention valve 17 includes a ball 18 as a valve body. Due to the flow of sewage toward the outlet 5k, the ball 18 is in the retracted position indicated by the dotted line in FIG. Therefore, the outflow side backflow prevention valve 17 permits the flow of sewage from the residue separation tank 5 toward the outlet 5k. On the other hand, the flow of sewage from the outlet 5k toward the residue separation tank 5 is prevented when the ball 18 is in the seating position shown in FIG.

  The submersible pump 6 includes a pump body 6b having an impeller 6a and a submersible motor 6e that rotationally drives the impeller 6a. The submersible pump 6 is fixed to the residue separation tank 5. In this embodiment, most of the submersible pump 6 is built in the residue separation tank 5. Specifically, a portion including the discharge port 6c of the pump main body 6b and the submersible motor 6e are disposed near the bottom of the separation tank main body 5a. However, the portion including the suction port 6d of the pump body 6b protrudes into the sewage tank 4 from the bottom of the separation tank body 5a. The discharge port 6c faces the bottom of the sewage tank 4 with a gap. A strainer 7 is fixed to the discharge port 6c.

  In the present embodiment, the inlet 5 g side of the residue separating tank 5 and the open end 2 a of the inflow pipe 2 are detachably connected by an inflow side connection mechanism (first connection mechanism) 21. Referring to FIG. 4, a through hole 4e is formed in the side wall 4d of the tank body 4a of the sewage tank 4, and the open end 2a of the inflow pipe 2 is formed outside the side wall 4d of the tank body 4a so as to coincide with the through hole 4e. It is fixed.

  Further referring to FIG. 5A, the side wall 4d of the sewage tank 4 at a position corresponding to the opening end 2a of the inflow pipe 2 is provided with a holding plate portion 4f positioned slightly away from the inner surface of the side wall 4d. The holding plate portion 4f is connected to the inner surface of the side wall 4d on the lower side and the left and right sides except for the upper side. For this reason, a guide groove 23 that is open only upward and extends in the vertical direction is formed by the holding plate portion 4f and the side wall inner surface of the sewage tank 4.

  An inflow restricting member 24 is slidably disposed in the guide groove 23 so as to be able to hold its own position by friction. Specifically, the inflow restricting member 24 includes a sliding plate portion 24a disposed in the guide groove 23 and a cylindrical portion 24b having both ends opened. A through hole 24c and an inflow restricting portion 24d are formed side by side in the sliding direction (vertical direction in the present embodiment) of the sliding plate portion 24a from the center portion to the lower end portion of the sliding plate portion 24a. In the present embodiment, as shown in FIG. 5A, the inflow restricting portion 24d is formed of a closed surface having no holes or slits. However, as shown in FIG. 5B, the inflow restricting portion 24d may be provided with a plurality of slits 24f penetrating the sliding plate portion 24a in the plate thickness direction and extending in the vertical direction. An operation part 24e is provided at the upper end of the sliding plate part 24a. In the present embodiment, the operation portion 24e is provided with a long groove-like hole for facilitating the operator to grip the sliding plate portion 24a by hand.

  The base end side of the cylindrical part 24b is connected to the sliding plate part 24a at the periphery of the through hole 24c. The cylindrical part 24b extends in the horizontal direction in a direction away from the side wall of the sewage tank 4 (in a direction approaching the inflow side cap part 5f of the residue separation tank). The distal end side of the cylindrical portion 24b is connected in a fixed state to one end of a flexible hose (first connecting pipe) 25 that is open at both ends. A fluid coupling (first fluid coupling) 26 is attached to the other end of the hose 25. The fluid coupling 26 removably connects the hose 25 to the inlet 5g of the residue separation tank 5.

  The outlet 5k side of the screen separation tank 5 and the open end 3a of the water supply pipe 3 are connected by a flexible hose (tube member) 27. First, one end of the hose 27 is fixed to the outlet side cap portion 5j of the residue separating tank 5. The other end of the hose 27 is fixedly connected to a gate valve 28 that is disposed in the residue separating tank 5 and is fixed to the open end 3 a side of the water supply pipe 3. The hose 27 has a sufficient length, and is at least sufficiently longer than the distance from the outlet 5k of the residue separation tank 5 to the upper opening 4b of the sewage tank 4.

Next, operation | movement of the sewage relay pump equipment 1 of this embodiment is demonstrated with reference to FIGS. 8-10. During operation, the position of the inflow restricting member 24 is set so that the through hole 24 c of the sliding plate portion 24 a coincides with the through hole 4 e of the side wall 4 d of the dirty water tank 4. As shown in FIG. 8, sewage containing sediment and earth and sand flows from the inflow pipe 2 into the residue separation tank 5. Specifically, from the open end 2 a of the inflow pipe 2, the through hole 4 e of the side wall 4 d of the sewage tank 4, the through hole 24 c of the inflow restriction member 24, the cylindrical portion 24 b of the inflow restriction member 24, the hose 25, and the fluid coupling 26 The sewage flows into the residue separation tank 5 through the inlet 5g. The sewage flowing into the residue separation tank 5 flows into the discharge port 6c of the submersible pump 6 that is stopped, and flows into the sewage tank 4 from the suction port 6d of the submersible pump 6. Since the sewage residue is separated from the sewage when passing through the strainer 7, the sewage from which the sewage has been separated is accumulated in the sewage tank 4. On the other hand, the residue separated by the strainer 7 accumulates in the residue separation tank 5. As the residue in the residue separation tank 5 increases, the ball 13 rises.

  When a large amount of sewage suddenly flows into the residue separation tank 5 from the inflow pipe 2, excess sewage overflows from the residue separation tank 5 to the sewage tank 4 through the overflow opening 5 h. Since the screen member 16 is disposed in the overflow opening 5h, a certain amount of residue is removed from the sewage when passing through the slit 16e of the screen member 16. Accordingly, it is possible to prevent the submersible pump 6 from being blocked by the residue remaining in the sewage tank 4 when the submersible pump 6 described later is operated.

  As shown in FIG. 9, the sewage in the sewage tank 4 has a predetermined water level (for example, a water level corresponding to a state in which the ball 13 in the screen separator tank 5 is pushed up by the screen and seated on the valve seat 14). When the water level gauge 9 detects that the water level has risen, the submersible pump 6 is started. As shown in FIG. 10, during operation of the submersible pump 6, sewage from which the residue in the sewage tank 4 has been separated is sucked into the submersible pump 6 from the suction port 6 d, and remains through the discharge port 6 c and the strainer 7. It is discharged into the separation tank 5. The sewage that has flowed into the residue separation tank 5 is sent to the downstream side from the water supply pipe 3 together with the residue in the residue separation tank 5. In detail, the sewage and the residue are discharged from the backflow prevention valve 17, the outlet 5 k (outlet side cap 5 j) of the residue separation tank 5, the hose 27, and the open end 3 a of the water pipe 3 through the gate valve 28. Flow into. Since the communication between the residue separation tank 5 and the inflow pipe 2 is blocked by the ball 13 seated on the valve seat 14, the sewage does not flow backward from the residue separation tank 5 to the inflow pipe 2. The sewage in the sewage tank 4 sucked by the submersible pump 6 has been separated by the strainer 7. Accordingly, the submersible pump 6 can be prevented from being blocked by foreign matters.

  Next, an operation for taking out the residue separation tank 5 and the submersible pump 6 from the sewage tank 4 for maintenance and the like will be described. First, the tank lid 4c is removed and the upper opening 4b is opened. Next, the inflow restricting member 24 is lifted by gripping the operation portion 24e, and the inflow restricting portion 24d of the sliding plate portion 24a is aligned with the through hole 4e of the side wall 4d of the sewage tank 4 (see FIG. 11). Subsequently, the fluid coupling 26 is removed and removed from the inflow side cap portion 5f of the residue separation tank 5, and the connection between the inlet 5g of the residue separation tank 5 and the open end 2a of the inflow pipe 2 is released. Since the hose 25 to which the fluid coupling 26 is attached has flexibility, the fluid coupling 26 can be easily detached from the inflow side cap portion 5f. Subsequently, the handle 16d provided on the screen member 16 is held, and together with the submersible pump 6, the residue separation tank 5 is taken out of the sewage tank 4 through the upper opening 4b. As described above, the outlet 5k of the residue separation tank 5 and the open end 3a of the water supply pipe 3 are connected by the hose 27 having flexibility and sufficient length. And the submersible pump 6 can be taken out. If it is taken out from the sewage tank 4, operations necessary for maintenance and the like can be easily performed on the residue separation tank 5 and the submersible pump 6. In particular, the earth and sand in the residue separation tank 5 can be easily removed simply by removing the separation tank lid 5b from the separation tank body 5a. Moreover, since the window part 11 is provided in the separation tank main body 5a, the state inside the residue separation tank 5 can be easily confirmed.

  When the residue separating tank 5 and the submersible pump 6 are taken out as described above, if the inflow restricting portion 24d of the inflow restricting member 24 is the closed surface shown in FIG. The inflow of sewage to is blocked. On the other hand, if the inflow restricting portion 24d of the inflow restricting member 24 is the slit shown in FIG. 5B, the sewage from which the residue is separated to some extent by this slit flows into the sewage tank 4 from the open end 2a of the inflow pipe 2. .

  The sewage relay pump facility 1 of the present embodiment is a solid separation type in which the sewage that has been separated by the strainer 7 flows into the submersible pump 6 (no spillage flows into the submersible pump 6). A small submersible pump 6 having a relatively small pump diameter and a relatively small output of the submersible motor 6e can be used while ensuring a sufficient foreign substance passage diameter as the facility 1. When the foreign matter passage diameter of the sewage relay pump facility 1 is about 35 mm, a small submersible pump 6 having a pump diameter of about 40 mm and an output of the submersible motor 6 e of about 0.75 kw can be used. By using the submersible pump 6 having a small pump diameter, the equipment can be downsized, and by using the low-power submersible motor 6e, power consumption can be reduced. In addition, the facility is downsized because the residue separation tank 5 and the submersible pump 6 are arranged in the sewage tank 4. Further, as described above, the residue separation tank 5 and the submersible pump 6 can be taken out from the tank body 4a of the sewage tank 4, so that it is not necessary to provide a work space in the sewage tank 4, and the apparatus is also in this respect. It is downsized. Furthermore, since most of the submersible pump 6 is accommodated in the residue separation tank 5, the sewage tank 4 is reduced in size and the equipment is further reduced in size.

(Second Embodiment)
In the sewage relay pump facility 1 according to the second embodiment of the present invention shown in FIGS. 12 and 13, the outlet 5k side of the residue separating tank 5 and the open end 3a of the water pipe 3 are connected to the outflow side coupling mechanism (second The connection mechanism) 31 is detachably connected. The outflow side connection mechanism 31 has a flexible hose 32 (second connection pipe) having one end connected to the water supply pipe 3 through the gate valve 28 and extending into the sewage tank 4, and the other end of the hose 32. And a fluid coupling (second fluid coupling) 33. By this fluid coupling 33, the hose 32 and the outflow side cap portion 5j of the residue separation tank 5 are detachably connected. As shown in FIG. 13, when removing the residue separating tank 5 and the submersible pump 6 from the sewage tank 4, the fluid coupling 26 releases the inflow pipe 2 and disconnects the inflow side cap portion 5 f of the residue separating tank 5. The connection between the water supply pipe 3 and the outflow side cap portion 5j of the residue separation tank 5 may be released by the fluid coupling 33. Since the fluid coupling 33 is attached to the tip of the flexible hose 32, the hose 32 can be easily detached from the outflow side cap portion 5j by operating the fluid coupling 33. Further, when removing the residue separating tank 5 and the submersible pump 6, the fluid coupling 33 is placed on the side wall 4 d side of the sewage tank 4 so as not to interfere with the residue separating tank 5 and the submersible pump 6 by bending the hose 32. Can be moved.

  Since other configurations and operations of the second embodiment are the same as those of the first embodiment, the same elements are denoted by the same reference numerals, and description thereof is omitted.

(Third embodiment)
The fourth embodiment of the present invention shown in FIG. 14 is different from the first embodiment in that most of the submersible pump 6 is disposed outside the residue separation tank 5. That is, the portion including the discharge port 6c of the pump body 6b is disposed in the residue separation tank 5, and the portion including the suction port 6d of the pump body 6b and the submersible motor 6e are disposed outside the residue separation tank 5. . By disposing most of the submersible pump 6 outside the residue separation tank 5, when the residue separation tank 5 and the submersible pump 6 are taken out from the sewage tank 4, the submersible pump 6 (especially the submersible motor 6e) can be easily used. ) To perform necessary tasks.

  Since other configurations and operations of the third embodiment are the same as those of the first embodiment, the same elements are denoted by the same reference numerals and description thereof is omitted. In the sewage relay pump facility 1 of the second embodiment, most of the submersible pump 6 may be disposed outside the residue separation tank 5 as in the present embodiment.

  The present invention is not limited to the above embodiment, and various modifications can be made. For example, contrary to the first embodiment, the outlet 5k of the residue separating tank 5 and the open end 3a side of the water supply pipe 3 are detachably connected by the same mechanism as the inflow side connecting mechanism 21 to separate the residue. You may connect the inflow port 5g of the tank 5 and the opening end 2a side of the inflow pipe 2 with a hose. Further, a handle for taking out the residue separating tank 5 and the submersible pump 6 from the sewage tank 4 may be provided on the separation tank lid 5b instead of the screen member 5h.

The longitudinal cross-sectional view which shows the sewage relay pump equipment of 1st Embodiment of this invention. Sectional drawing in the II-II line of FIG. Sectional drawing in the III-III line of FIG. The elements on larger scale of FIG. 1 which show an inflow side connection mechanism. (A) And (B) is sectional drawing in the VV line of FIG. 4 which shows an inflow control member. A screen member is shown, (A) is a front view, (B) is sectional drawing in the VI-VI line of (A). The other example of a screen member is shown, (A) is a front view, (B) is sectional drawing in the VII-VII line of (A). The longitudinal cross-sectional view which shows the sewage relay pump installation in which sewage is flowing in into a residue separation tank. The longitudinal cross-sectional view which shows the sewage relay pump equipment of the state with which the residue separation tank was filled with the residue. The longitudinal cross-sectional view which shows the sewage relay pump installation which is carrying out the sewage in a sewage storage tank with a submersible pump, and pumping it through a residue separation tank. The longitudinal cross-sectional view which shows the sewage relay pump equipment of the state which took out the residue separation tank and the submersible pump from the sewage storage tank. The longitudinal cross-sectional view which shows the sewage relay pump equipment of 2nd Embodiment of this invention. It is a longitudinal cross-sectional view which shows the sewage relay pump equipment of the state which took out the residue separation tank and the submersible pump from the sewage storage tank. The longitudinal cross-sectional view which shows the sewage relay pump equipment of 3rd Embodiment of this invention. The perspective view which shows a strainer.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sewage relay pump equipment 2 Inflow pipe 2a Open end 3 Water supply pipe 3a Open end 4 Sewage tank 4a Tank main body 4b Upper opening 4c Tank lid body 4d Side wall 4e Through-hole 4f Holding plate part 5 Screen separation tank 5a Separation tank main body 5b Separation Tank cover 5c Large diameter cylindrical portion 5d Conical portion 5e Small diameter cylindrical portion 5f Inlet side cap portion 5g Inlet 5h Overflow opening 5i Female thread portion 5j Outlet side cap portion 5k Outlet 6 Submersible pump 6a Impeller 6b Pump body 6c Discharge port 6d Suction port 6e Submersible motor 7 Strainer 7a Rod 8 Controller 9 Water level gauge 11 Window part 12 Support body 13 Ball 14 Valve seat 16 Screen member 16a Cylindrical part 16b Rod 16c Top plate 16d Handle 16e Slit 16f Male thread part 17 Backflow prevention valve 18 Ball 21 Inflow side coupling machine 23 guide groove 24 flows into the regulating member 24a sliding plate portion 24b cylindrical portion 24c through hole 24d inflow control portion 24e operation unit 25 a hose 26 the fluid coupling 27 Hose 28 gate valve 31 outlet side connecting mechanism 32 hose 33 fluid coupling

Claims (16)

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 sewage storage tank comprising a storage tank main body communicating with the opening ends of the inflow pipe and the water supply pipe, and a lid for closing the upper opening of the storage tank main body so as to be opened and closed;
Although it is arranged in the sewage storage tank, an inflow port through which sewage flows from the inflow pipe, an outflow port from which sewage flows out to the water supply pipe, and inflow of sewage from the inflow pipe to the inflow port are permitted. A residue separation tank comprising a backflow prevention mechanism for preventing backflow of sewage from the inflow port to the inflow pipe;
A first connection mechanism for detachably connecting one of the inlet of the residue separation tank and the opening end of the inflow pipe and the outlet of the residue separation tank and the opening end of the water supply pipe;
Connect the other of the inlet of the residue separation tank and the open end of the inlet pipe and the outlet of the residue separator tank and the open end of the water supply pipe, and store the sewage from at least the inlet or the outlet. A flexible tube member longer than the distance to the top opening of the tank;
A discharge port that is disposed in the wastewater storage tank and opens into the residue separation tank, a suction port that opens into the wastewater storage tank, a pump body having an impeller, and a submersible pump that rotationally drives the impeller; A submersible pump fixed to the residue separation tank, which permits backflow of sewage from the discharge port to the suction port when stopped, and
A solid-liquid separator that separates the scum from sewage flowing into the discharge port of the submersible pump from the slag separation tank and permits the flow of sewage from the discharge port into the slag separation tank, Sewage relay pump equipment. 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 sewage storage tank comprising a storage tank main body communicating with the opening ends of the inflow pipe and the water supply pipe, and a lid for closing the upper opening of the storage tank main body so as to be opened and closed;
Although it is arranged in the sewage storage tank, an inflow port through which sewage flows from the inflow pipe, an outflow port from which sewage flows out to the water supply pipe, and inflow of sewage from the inflow pipe to the inflow port are permitted. A residue separation tank comprising a backflow prevention mechanism for preventing backflow of sewage from the inflow port to the inflow pipe;
A first connection mechanism for detachably connecting one of the inlet of the residue separation tank and the opening end of the inflow pipe and the outlet of the residue separation tank and the opening end of the water supply pipe;
A second coupling mechanism that removably couples the inlet of the residue separation tank and the opening end of the inflow pipe and the outlet of the residue separation tank and the opening end of the water supply pipe;
A discharge port disposed in the wastewater storage tank and opening in the residue separation tank; a suction port opening in the wastewater storage tank; a pump body having an impeller; and a submersible pump for rotationally driving the impeller. And a submersible pump fixed to the residue separation tank, which permits reverse flow of sewage from the discharge port to the suction port when stopped, and
A solid-liquid separator that separates the scum from sewage flowing into the discharge port of the submersible pump from the slag separation tank and permits the flow of sewage from the discharge port into the slag separation tank, Sewage relay pump equipment.   The sewage relay pump facility according to claim 1 or 2, wherein the first connection mechanism connects an inlet of the sewage storage tank and an open end of the inflow pipe. The first coupling mechanism includes:
A flexible first connecting pipe having one end connected to the inflow pipe side and extending into the wastewater storage tank;
The sewage relay pump facility according to claim 3, further comprising: a first fluid coupling that detachably connects the other end of the first connecting pipe and the inlet of the residue separation tank. The opening end of the inflow pipe opens to the side wall of the sewage storage tank,
The first coupling mechanism includes:
A holding portion that is provided on the inner surface of the side wall of the sewage storage tank at a position corresponding to the opening end of the inflow pipe, and that forms a guide groove between the inner surface of the side wall of the sewage storage tank;
A sliding plate portion having a through hole and an inflow restricting portion which are arranged in the guide groove so as to be slidable and can hold their own position, and is arranged in the sliding direction, and one end communicates with the through hole. The sewage relay pump equipment according to claim 4, further comprising: an inflow control member that protrudes from the sliding plate portion and has a cylindrical portion that is open at both ends and connected to the first connection pipe at the other end. .   The sewage relay pump facility according to claim 5, wherein the inflow restricting portion includes a closed surface.   The sewage relay pump facility according to claim 5, wherein the inflow restricting portion includes a slit.   The sewage relay pump facility according to claim 2, wherein the second connection mechanism connects an outlet of the residue separation tank and an open end of the water pipe. The second coupling mechanism is:
A flexible second connection pipe having one end connected to the water supply pipe and extending in the wastewater storage tank;
The sewage according to claim 5, comprising a second fluid coupling provided at the other end of the second connecting pipe and detachably connecting the second connecting pipe and the outlet of the residue separation tank. Relay pump equipment. In the submersible pump, a portion including the discharge port of the pump body and a submersible motor are disposed in the residue separation tank, and a portion including the suction port of the pump body is disposed from the bottom of the residue separation tank. The sewage relay pump equipment according to any one of claims 1 to 9, which protrudes into the sewage storage tank. In the submersible pump, a portion of the pump body including the discharge port is disposed in the residue separation tank, and a portion of the pump body including the suction port and an underwater motor are disposed outside the residue separation tank. The sewage relay pump equipment according to any one of claims 1 to 9, wherein The residue separation tank is
A separation tank body with an open top;
The sewage according to any one of claims 1 to 11, further comprising a lid part that is detachably attached to the separation tank body, closes the opening, and includes the inflow port and the outflow port. Relay pump equipment.   The sewage relay pump equipment according to any one of claims 1 to 12, wherein the residue separating tank includes a window portion having a function of visually recognizing the inside from the outside.   The sewage relay pump facility according to any one of claims 1 to 13, wherein the slag separation tank includes a handle for taking out the spillage separation tank and the submersible pump from the sewage storage tank. An overflow opening formed in the upper part of the residue separator,
A screen member attached to the overflow opening and separating the sewage residue overflowing from the residue separation tank to the wastewater storage tank through the overflow opening. The sewage relay pump equipment according to any one of the above.   The sewage relay pump equipment according to claim 15, further comprising an opening degree adjusting mechanism for adjusting an opening degree of the screen member.

Images