JP2009216007A - Manhole pump system and foreign matter separator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manhole pump system increased in efficiency while avoiding the clogging of submerged pumps. <P>SOLUTION: This manhole pump system comprises a separating means (foreign matter separator 5) for making the first submerged pump 2 having a predetermined foreign matter passing property suck the wastewater containing foreign matter stored in a wastewater tank 1 and also making the second submerged pump 3 with an efficiency higher than that of the first submerged pump 2 suck the wastewater from which foreign matter is separated. The wastewater containing foreign matter is pumped up by the first submerged pump 2, and the wastewater not containing the foreign matter is pumped up by the second submerged pump 3. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a pump system including a pump installed in a manhole for transferring sewage containing contaminants and pumping up the sewage stored therein, and from sewage containing contaminants stored in the manhole. The present invention relates to a separation device for separating the components.

  Conventionally, in a manhole pump system for transferring sewage containing contaminants, a so-called vortex impeller (see, for example, Patent Document 1) or a non-clog type impeller that ensures the passage of contaminants so that the pump is not clogged with contaminants. A car (see, for example, Patent Document 2) is used.

In a high-passage submersible pump that ensures the passage of contaminants, measures are taken such as reducing the number of blades, increasing the impeller internal flow path, or increasing the gap between the impeller and the pump casing.
JP-A-2005-240629 JP 2006-291917 A

  However, the high-passage submersible pump with the above countermeasures has lower pump efficiency than a submersible pump having a normal impeller without such countermeasures. As a result, the manhole pump system for transferring sewage containing contaminants has the disadvantage that its system efficiency is relatively low. In addition, a submersible pump having a normal impeller with relatively high pump efficiency cannot be used as it is in a manhole pump system for transferring sewage containing contaminants because clogging occurs due to contaminants.

  The present invention has been made in view of the above points, and the object of the present invention is to improve the efficiency of the pump system while avoiding clogging of the submersible pump in the manhole pump system for transferring sewage containing impurities. There is to make it.

  In the first invention, the manhole pump system includes a sewage tank storing sewage containing contaminants, an inflow pipe connected to the sewage tank and transferring sewage containing contaminants into the sewage tank, and the sewage A manhole pump system installed in the tank and provided with two or more submersible pumps for discharging the sewage in the sewage tank out of the sewage tank through a discharge pipe, wherein the two or more submersible pumps are predetermined Including at least one first submersible pump having a contaminant passage property and at least one second submersible pump having higher pump efficiency than the first submersible pump. The second submersible pump is further provided with a separating means for sucking in the sewage separated from the foreign matter while sucking in the sewage containing the foreign matter stored in the sewage tank.

  According to this configuration, the relatively high efficiency of the second submersible pump sucks in the sewage from which the contaminants have been separated by the separating means and treats it, so the second submersible pump is clogged with contaminants. Without generating, sewage is discharged out of the sewage tank with high pump efficiency. On the other hand, although the first submersible pump sucks in sewage containing contaminants, the first submersible pump has the ability to pass contaminants, so that sewage and contaminants can be discharged out of the sewage tank without clogging. Discharge. As a result, while avoiding clogging of the submersible pump, the entire manhole pump system can transfer sewage containing impurities with higher efficiency than before.

  In a second invention, in the first invention, the separating means has a first suction pipe whose tip is connected to a pump suction port of the first submersible pump, and a tip of the separation means that is a pump suction of the second submersible pump. A second suction pipe connected to the mouth, an internal space to which the proximal ends of the first and second suction pipes are respectively connected, and sewage stored in the sewage tank for sucking into the internal space A strainer box having a suction port; and a strainer that is disposed at a connection portion between the second suction pipe in the internal space of the strainer box and prevents contaminants from passing to the second suction pipe side. It has.

  According to this configuration, the sewage containing impurities flowing into the strainer box from the suction port by the driving of the first and second submersible pumps passes through the first and second suction pipes. Each is sucked into a submersible pump. Here, since a strainer is not provided on the first suction pipe side, sewage containing impurities flows as it is and is sucked into the first submersible pump. On the other hand, since a strainer is disposed on the second suction pipe side, the passage of contaminants is prevented, and sewage containing no contaminants is sucked into the second submersible pump. And the sewage containing a contaminant is processed with the said 1st submersible pump, On the other hand, the sewage which does not contain a contaminant is processed with the said 2nd submersible pump. As a result, the second submersible pump can pump up sewage with high pump efficiency without causing clogging with foreign substances. On the other hand, the first submersible pump can pump up sewage without causing clogging with foreign substances.

  According to a third aspect, in the second aspect, the strainer box includes an upper surface and a lower surface opposed to each other in the vertical direction, and a peripheral surface between the upper surface and the lower surface, and the suction port is formed on the lower surface. The second suction pipe is connected to the strainer box at a substantially central position on the upper surface of the strainer box, and the first suction pipe is connected to a peripheral surface of the strainer box. ing.

  In the configuration in which the strainer is disposed on the second suction pipe side, there is a possibility that the foreign matter sticks to the strainer and is clogged.

  On the other hand, according to the above configuration, the second suction pipe to which the strainer is attached is connected to a substantially center position on the upper surface of the strainer box, while the first suction pipe is connected to a peripheral surface of the strainer box. Therefore, when the first submersible pump is driven, a swirling flow is generated in the strainer box. Due to this swirling flow, the foreign matter is pushed outward in the radial direction to leave the vicinity of the strainer, and the foreign matter already attached to the strainer is also peeled off and pushed outward in the radial direction. .

  Thus, while effectively preventing clogging of the strainer, the contaminants are efficiently transferred to the first suction pipe side by the swirling flow, and the contaminants are transferred to the outside of the sewage tank through the first submersible pump. Wastewater containing can be discharged.

  In a fourth invention, in the second or third invention, each of the first and second submersible pumps can be installed at the bottom of the sewage tank and pulled up from the sewage tank, The separation means is fixed to a bottom portion of the sewage tank, and the first suction pipe has a tip end portion of the first submersible pump in a state where the first submersible pump is installed at the bottom portion of the sewage tank. Urging means for bringing the tip portion into close contact with the pump suction port of the first submersible pump by urging to the pump suction port side of the first submersible pump. In a state where it is installed at the bottom of the tank, the tip is biased toward the pump suction port of the second submersible pump, thereby biasing the tip to the pump suction port of the second submersible pump. Means.

  According to this configuration, when the first and second suction pipes are provided with urging means, when the first and second submersible pumps are lowered and installed at the bottom of the sewage tank, the first and second suction pipes are provided. It is possible to automatically connect the pump suction port of the two submersible pump and the first and second suction pipes in close contact with each other. As a result, particularly for the second submersible pump, only the sewage that has passed through the strainer can be sucked in, and the clogging of the pump can be avoided in advance.

  In the fifth invention, the contaminant separator is installed at the bottom of the sewage tank that stores sewage containing contaminants, and the tip of the contaminant separator is at the pump suction port of the first submersible pump having a predetermined contaminant passage property. A first suction pipe connected; a second suction pipe whose tip is connected to a pump suction port of a second submersible pump having higher pump efficiency than the first submersible pump; and the first and second suction pipes A strainer box having an internal space to which each base end is connected, a suction port for sucking sewage stored in the sewage tank into the internal space, and the first space in the internal space of the strainer box. And a strainer that is disposed at a connection portion with the two suction pipes and prevents impurities from passing to the second suction pipe side.

  According to this configuration, the sewage containing impurities is sucked into the first submersible pump through the first suction pipe by the driving of the first and second submersible pumps. On the other hand, sewage containing no contaminants is sucked into the second submersible pump by the strainer disposed on the second suction pipe side. As a result, the second submersible pump can pump up sewage with high pump efficiency without causing clogging with foreign substances. On the other hand, the first submersible pump can pump up sewage without causing clogging with foreign substances.

  According to a sixth aspect, in the fifth aspect, the strainer box includes an upper surface and a lower surface opposed to each other in the vertical direction, and a peripheral surface between the upper surface and the lower surface, and the suction port is formed in the lower surface. The second suction pipe is connected to the strainer box at a substantially central position on the upper surface of the strainer box, and the first suction pipe is connected to a peripheral surface of the strainer box. ing.

  According to the above configuration, when the first submersible pump is driven, a swirling flow is generated in the strainer box, so that foreign substances are pushed outward in the radial direction, away from the vicinity of the strainer, and Contaminants already attached to the strainer are also peeled away from the strainer and pushed outward in the radial direction.

  Thus, while effectively preventing clogging of the strainer, contaminants are efficiently transferred to the first suction pipe side by swirling flow, and sewage is discharged outside the sewage tank through the first submersible pump. Can be discharged.

  In a seventh invention, in the fifth or sixth invention, each of the first and second submersible pumps can be installed at the bottom of the sewage tank and pulled up from the sewage tank, In the state where the first submersible pump is installed at the bottom of the sewage tank, the first suction pipe urges the tip to the pump suction port side of the first submersible pump, thereby The second suction pipe includes an urging means for closely contacting the pump suction port of the first submersible pump, and the tip of the second suction pipe is disposed in the state where the second submersible pump is installed at the bottom of the sewage tank. (2) An urging unit is provided that urges the tip of the second submersible pump toward the pump inlet of the second submersible pump by urging the pump submersible pump toward the pump inlet.

  According to this configuration, when the first and second suction pipes are provided with urging means, when the first and second submersible pumps are lowered and installed at the bottom of the sewage tank, the first and second suction pipes are provided. It is possible to automatically connect the pump suction port of the two submersible pump and the first and second suction pipes in close contact with each other.

  As described above, in the manhole pump system of the present invention, by providing the separation means, the second submersible pump with high pump efficiency transfers sewage containing no contaminants. On the other hand, the 1st submersible pump which ensured the passage of impurities transfers sewage containing impurities. As a result, in the manhole pump system for transferring sewage containing impurities, the efficiency of the pump system can be improved as compared with the conventional one while avoiding clogging of the submersible pump.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The following description of the preferred embodiment is merely illustrative in nature and is not intended to limit the application method of the present invention.

  As shown in FIGS. 1 to 3, the manhole pump system of the present invention includes a sewage tank 1, a first submersible pump 2 and a second submersible pump 3 arranged in the sewage tank 1 in a horizontal direction, An inflow pipe 4 for transferring sewage from an upstream sewage generation site (general household, etc.) or a manhole pump system, a contaminant separator 5 for separating contaminants from sewage containing contaminants, and a first submersible pump 2 And discharge pipes 6 and 6 for transferring the sewage pumped up by the second submersible pump 3 to the outside of the sewage tank 1.

  The sewage tank 1 is buried in the ground, and has a substantially cylindrical shape with its upper end opened and its bottom closed. Moreover, the recessed part 7 in which the contaminant separation apparatus 5 is installed is provided in the approximate center position of the bottom part in the said sewage tank 1 so that it may mention later.

  The inflow pipe 4 is buried in the ground like the sewage tank 1. The discharge end portion of the inflow pipe 4 is disposed through the sewage tank 1 at a substantially central position in the height direction on the side wall of the sewage tank 1. The discharge end of the inflow pipe 4 is also bent downward, and discharges sewage containing impurities in the sewage tank 1 vertically downward.

  The first submersible pump 2 is composed of a centrifugal pump, and includes a pump casing 13 in which an impeller is disposed, and a sealed submersible motor that is positioned on the upper end side of the pump casing 13 and rotates the impeller. Yes.

  Although the illustration of the impeller of the first submersible pump 2 is omitted, it is a vortex impeller or non-log impeller that ensures the passage of contaminants, so that the first submersible pump 2 is relatively high in contaminants. The pump efficiency is reduced (for example, about 70%).

  The pump casing 13 is provided with a pump suction port 15 that protrudes downward from the lower surface thereof, and is integrally provided with a discharge port 17 that protrudes in the horizontal direction from the side surface. As shown in FIG. 5, the pump suction port 15 has an enlarged diameter portion 19 whose diameter increases downward, and as will be described later, a contaminant separating device 5 is provided with respect to the enlarged diameter portion 19. Is connected. Further, the connection mechanism portion 12 is provided at the distal end portion of the discharge port 17, and the discharge port 17 is connected to the connection tube 11 of the discharge tube 6 by the connection mechanism portion 12 as will be described later.

  The second submersible pump 3 is a centrifugal pump, and includes a pump casing 14 in which an impeller is disposed, and a sealed submersible motor that is positioned on the upper end side of the pump casing 14 and rotates the impeller. ing. Although the illustration of the impeller of the second submersible pump 3 is omitted, a multi-blade impeller with relatively high pump efficiency is used, although the passage of impurities is not ensured. For this reason, the 2nd submersible pump 3 has high pump efficiency (for example, 80% or more) compared with the 1st submersible pump 2.

  The pump casing 14 is provided with a pump suction port 16 that protrudes downward from the lower surface thereof, and is integrally provided with a discharge port 18 that protrudes in the horizontal direction from the side surface. As shown in FIG. 5, the pump suction port 16 has an enlarged diameter portion 20 whose diameter increases downward, and as will be described later, a contaminant separating device 5 is provided with respect to the enlarged diameter portion 20. Is connected. Further, the connection mechanism portion 12 is provided at the distal end portion of the discharge port 18, and the discharge port 18 is connected to the connection tube 11 of the discharge tube 6 by the connection mechanism portion 12 as will be described later.

  In the sewage tank 1, for each of the first and second submersible pumps 2, 3, a guide pipe 8 and a discharge pipe 6 extending in the vertical direction from the top to the bottom in the sewage tank 1 are disposed. By the pipe 8, the 1st submersible pump 2 and the 2nd submersible pump 3 raise / lower the inside of a sewage tank separately. The upper end of the discharge pipe 6 is bent so that the opening is in the horizontal direction. And the upper end part of the discharge pipe 6 is penetrating the outside of the sewage tank 1 in the upper part of the height direction in the side wall of the sewage tank 1. The lower end portion of the discharge pipe 6 is bent so that the opening thereof is sideways, and the connection pipe 11 which is the bent lower end portion of the discharge pipe 6 is attached to the support base 9 installed at the bottom in the sewage tank 1. It is supported.

  The connection mechanism 12 of the first submersible pump 2 is engaged with the guide pipe 8 so as to be slidable in the vertical direction along the guide pipe 8, whereby the first submersible pump 2 is connected to the guide pipe 8. Is taken down to the bottom of the sewage tank 1. When the first submersible pump 2 reaches the bottom of the sewage tank 1, the connection mechanism 12 automatically connects the discharge port 17 of the pump casing 13 to the connection pipe 11.

  Similarly to the first submersible pump 2, the second submersible pump 3 is engaged with the connecting mechanism 12 so as to be slidable in the vertical direction along the guide pipe 8. Is transferred to the bottom of the sewage tank 1 through the guide pipe 8. When the second submersible pump 3 reaches the bottom of the sewage tank 1, the connection mechanism 12 automatically connects the discharge port 18 of the pump casing 14 to the connection pipe 11.

  The contaminant separating device 5 is installed in the concave portion 7 in the bottom of the sewage tank 1 and is supported by the support base 10. As shown in FIGS. 2 to 4, the contaminant separator 5 includes a suction port 51 for sucking in sewage containing contaminants, a first suction pipe 53 connected to the first submersible pump 2, and a second submersible pump. 2 and a strainer box 55 having a strainer 52 installed therein.

  The strainer box 55 has a substantially cylindrical shape, and is connected so that the suction port 51 protrudes downward at a substantially central position on the lower surface thereof. In addition, the second suction pipe 54 is connected so as to protrude upward at substantially the center position of the upper surface of the strainer box 55, and the first suction pipe 53 is connected to the peripheral surface so as to be in a tangential direction. Yes. In the present embodiment, the first suction pipe 53 is connected in a tangential direction with respect to the peripheral surface of the strainer box 55, but may be connected in an arbitrary direction with respect to the peripheral surface even if it is not in the tangential direction. .

  The first suction pipe 53 extends upward after being bent upward at an intermediate portion thereof, and its tip end (upper end) is positioned at the same height as the upper end of the second suction pipe 54. Has been. Thereby, the upper end part of the 1st suction pipe 53 and the upper end part of the 2nd suction pipe 54 are arrange | positioned along with the horizontal direction.

  As shown in FIG. 5, the distal end portion of the first suction pipe 53 is a first desorption mechanism portion 21 having a reduced diameter portion 23 whose diameter decreases upward, and the reduced diameter portion 23 is the first underwater portion. The first suction pipe 53 and the first submersible pump 2 communicate with each other by being inserted into the enlarged diameter portion 19 of the pump 2. In this way, when the first submersible pump 2 is lowered along the guide pipe 8 by inserting the reduced diameter portion 23 into the enlarged diameter portion 19, the pump suction port 15 of the first submersible pump 2 and the first It is possible to automatically match the axes of the one suction pipe 53 with each other and connect them.

  The first desorption mechanism 21 is inserted into the main body of the first suction pipe 53, and between the first desorption mechanism 21 and the first suction pipe 53, compression as an urging means is performed. A coil spring 25 is incorporated.

  When the first submersible pump 2 is positioned at the installation position, the compression coil spring 25 is pushed downward to contract and thereby urge the first desorption mechanism 21 upward ((b) in the figure). Thus, the adhesion between the pump suction port 15 and the first desorption mechanism 21 is enhanced.

  As shown in FIG. 5, the distal end portion of the second suction pipe 54 is a second desorption mechanism portion 22 having a reduced diameter portion 24 whose diameter decreases upward, and the reduced diameter portion 24 is a second underwater portion. The second suction pipe 54 and the second submersible pump 3 communicate with each other by being inserted into the enlarged diameter portion 20 of the pump 3. In this way, when the second submersible pump 3 is lowered along the guide pipe 8 by inserting the reduced diameter section 24 into the enlarged diameter section 20, the pump suction port 16 of the second submersible pump 3 and the first It is possible to automatically match the axes of the two suction pipes 54 and connect them.

  The second desorption mechanism 22 is inserted into the main body of the second suction pipe 54, and between the second desorption mechanism 22 and the second suction pipe 54, compression as an urging means is provided. A coil spring 26 is incorporated.

  When the second submersible pump 3 is positioned at the installation position, the compression coil spring 26 is pushed downward to contract and thereby urge the second desorption mechanism 22 upward (FIG. 5B). This improves the adhesion between the pump suction port 16 and the second desorption mechanism 22.

  As shown in FIG. 4, the strainer 52 has a substantially cylindrical shape with an open upper end, and is installed in the strainer box 55 so as to cover the connection portion between the second suction pipe 54 and the strainer box 55. . The strainer 52 allows passage of water while preventing passage of impurities, and is made of, for example, a metal or resin net or a perforated plate. In addition, the size of the hole in the strainer 52 may be appropriately set in consideration of the size of impurities.

  Although not shown, the water level in which the submersible pump start water level, the submersible pump stop water level, and the abnormal water level are set in the sewage tank 1 for automatic operation control of the first submersible pump 2 and the second submersible pump 3. A detection unit is provided, and a control panel to which a detection signal is input is provided above the sewage tank 1.

  The manhole system is configured as described above. Next, the operation of the manhole pump system will be described.

  The sewage containing impurities transferred from the inflow pipe 4 is stored in the sewage tank 1.

When the water level in the sewage tank 1 reaches the submersible pump activation water level, the control panel activates the first submersible pump 2 and the second submersible pump 3.

  When the first submersible pump 2 and the second submersible pump 3 are activated, sewage containing impurities is sucked into the strainer box 55 from the suction port 51.

  The sewage containing impurities flowing into the strainer box 55 tends to flow to the first suction pipe 53 by the suction force of the first submersible pump 2 and to the second suction pipe 54 by the suction force of the second submersible pump 3. . At this time, the sewage containing contaminants that are about to flow into the second suction pipe 54 is separated by the strainer 52 and flows into the second suction pipe 54. On the other hand, sewage containing impurities flows into the first suction pipe 53 as it is.

  Here, since the first suction pipe 53 connected to the first submersible pump 2 is connected to the peripheral surface of the strainer box 55, the first suction pipe 53 is swung into the strainer box 55 by the suction force toward the peripheral surface side. A flow is generated. As a result, contaminants in the sewage are pushed outward in the radial direction. Therefore, the contaminants come away from the strainer 52 disposed at the substantially central position in the strainer box 55, and the adhesion of the contaminants to the strainer 52 can be prevented or reduced. Thereby, clogging of the strainer 52 can be prevented and the second submersible pump 3 can be driven stably.

  The sewage containing impurities transferred from the strainer box 55 to the first suction pipe 53 is transferred from the first suction pipe 53 to the first submersible pump 2. On the other hand, the sewage containing no contaminants transferred from the strainer box 55 to the second suction pipe 54 is transferred from the second suction pipe 54 to the second submersible pump 3.

  The first submersible pump 2 pumps up sewage containing impurities, and the pumped liquid is discharged out of the sewage tank 1 through the discharge pipe 6. At this time, the first submersible pump 2 is not clogged because the contaminant passage property is ensured.

  On the other hand, the second submersible pump 3 pumps up sewage containing no impurities, and the pumped liquid is discharged out of the sewage tank 1 through the discharge pipe 6. At this time, since contaminants do not exist in the sewage, the second submersible pump 3 is not clogged, and high pump efficiency by the second submersible pump 3 can be obtained.

  When the sewage is discharged from the sewage tank 1 and the water level in the sewage tank 1 reaches the submersible pump stop water level, the control panel stops the first submersible pump 2 and the second submersible pump 3.

  As described above, according to the present embodiment, the first submersible pump 2 is made to suck in sewage containing foreign substances stored in the sewage tank 1, while the second submersible pump 3 is By using the contaminant separating device 5 as a separating means for sucking in the sewage from which the contaminants have been separated, the sewage containing no contaminants in the first submersible pump 2 in which the contaminants pass through is secured. Can be transferred by the second submersible pump 3 having a relatively high pump efficiency. As a result, it is possible to transfer sewage with higher efficiency compared to a manhole pump system composed of only the first submersible pump 2 while avoiding clogging of the submersible pump.

  Further, when installing the first and second submersible pumps 2 and 3 in the sewage tank 1, as described above, the first and second submersible pumps 2 and 3 are simply lowered along the guide pipe 8, The pump suction ports 15 and 16 can be connected to the contaminant separating device 5, and the discharge ports 17 and 18 can be connected to the discharge pipes 6 and 6. At this time, since the compression coil springs 25 and 26 are built in the first and second desorption mechanism sections 21 and 22, the pump suction ports 15 and 16 of the first and second submersible pumps 2 and 3, The first and second suction pipes 53 and 54 of the separation device 5 can be connected in close contact with each other, and in particular, the second submersible pump 3 is reliably prevented from sucking in impurities. Further, the pump suction ports 15 and 16 of the first and second submersible pumps 2 and 3 and the first and second suction pipes 53 and 54 of the contaminant separating device 5 are reduced in diameter to the enlarged diameter portions 19 and 20, respectively. Since 23 and 24 are connected by being interpolated, the connection can be released simply by raising the first and second submersible pumps 2 and 3. Therefore, maintenance of the first and second submersible pumps 2 and 3 is facilitated.

  In addition, in this embodiment, although the 1st submersible pump 2 and the 2nd submersible pump 3 are operated simultaneously, it is not necessary to operate simultaneously. For example, the first submersible pump 2 and the second submersible pump 3 may be operated alternately. Further, the operation frequency of the first submersible pump 2 and the second submersible pump 3 may be appropriately set according to the amount of contaminants contained in the sewage stored in the sewage tank 1. For example, when the amount of contaminants is relatively large, the activation frequency of the first submersible pump 2 is increased, while when the amount of contaminants is relatively small, the activation frequency of the second submersible pump 3 is increased. Also good. Thus, when operating the 1st and 2nd submersible pumps 2 and 3 alternately, when operating only the 2nd submersible pump 3, there is a possibility that a foreign substance may stick to strainer 52. However, as described above, it is possible to remove foreign substances stuck to the strainer 52 by the swirling flow generated when the first submersible pump 2 is operated.

  Moreover, the 1st submersible pump 2 and the 2nd submersible pump 3 do not need to be 1 unit | set, respectively, but should just be 1 or more each. Moreover, according to the number of the 1st submersible pumps 2 and the 2nd submersible pumps 3, you may change the number of the 1st suction pipe 53 and the 2nd suction pipe 54 suitably.

  Moreover, in the said embodiment, while fixing the contaminant separation apparatus 5 with the support stand 10 by the recessed part 7 of the inner bottom part of the sewage tank 1, the 1st and 2nd submersible pumps 2 and 3 can be raised-lowered, The contaminant separator 5 and the first and second submersible pumps 2 and 3 are connected in the tank 1. For example, the contaminant separator 5 and the first submersible pump outside the sewage tank 1. After fixing 2 and the 2nd submersible pump 3 with a screw etc., you may drop into the sewage tank 1. That is, the contaminant separation device 5 and the first and second submersible pumps 2 and 3 may be integrated. By doing so, for example, when the contaminant separating device 5 breaks down due to clogging of the strainer 52 or the like, the first submersible pump 2 and the submersible pump 2 and the By taking the second submersible pump 3 out of the sewage tank 1 through the guide pipe 8, the contaminant separator 5 can be taken out of the sewage tank 1.

  As described above, the present invention is useful in that the manhole pump system for transferring sewage containing contaminants can transfer sewage containing contaminants with higher efficiency than before while avoiding clogging of the submersible pump. is there.

It is a side view of the partial cross section of the manhole pump system of this invention. It is a perspective view which shows the state which connected the 1st submersible pump and the 2nd submersible pump, and the foreign material separator of this invention. It is a perspective view which shows the state which decomposed | disassembled the 1st submersible pump and the 2nd submersible pump, and the foreign material separator of this invention. It is a perspective view of the partial cross section of a strainer box. It is sectional drawing which shows the connection structure of the desorption mechanism part of a foreign material separator, and the pump suction port of a submersible pump.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sewage tank 2 1st submersible pump 3 2nd submersible pump 4 Inflow pipe 5 Contaminant separator 6 Discharge pipe 15 Pump suction port 16 Pump suction port 51 Suction port 52 Strainer 53 1st suction tube 54 2nd suction tube 55 Strainer box

Claims (7)

A sewage tank for storing sewage containing contaminants, an inflow pipe connected to the sewage tank and transferring sewage containing contaminants into the sewage tank, installed in the sewage tank, and in the sewage tank A manhole pump system comprising two or more submersible pumps for discharging the sewage water out of the sewage tank through a discharge pipe,
The two or more submersible pumps include at least one first submersible pump having a predetermined contaminant passage property and at least one second submersible pump having higher pump efficiency than the first submersible pump,
Separating means for sucking in sewage containing foreign substances stored in the sewage tank to the first submersible pump, and sucking in sewage separated from foreign substances in the second submersible pump. A manhole pump system characterized by further comprising: The manhole pump system according to claim 1,
The separating means includes
A first suction pipe whose tip is connected to a pump suction port of the first submersible pump;
A second suction pipe whose tip is connected to the pump suction port of the second submersible pump;
A strainer box having an internal space to which proximal ends of the first and second suction pipes are respectively connected, and a suction port for sucking sewage stored in the sewage tank into the internal space;
And a strainer that is disposed in a connection portion with the second suction pipe in the internal space of the strainer box and that prevents impurities from passing to the second suction pipe side. Manhole pump system. In the manhole pump system according to claim 2,
The strainer box has a substantially cylindrical shape including an upper surface and a lower surface facing in the vertical direction and a peripheral surface between the upper surface and the lower surface, and the suction port is formed on the lower surface,
The second suction pipe is connected to the strainer box at a substantially central position on the upper surface of the strainer box,
The manhole pump system, wherein the first suction pipe is connected to a peripheral surface of the strainer box. In the manhole pump system according to claim 2 or 3,
Each of the first and second submersible pumps can be installed at the bottom of the sewage tank and pulled up from within the sewage tank,
The separation means is fixed to the bottom of the sewage tank,
In the state where the first submersible pump is installed at the bottom of the sewage tank, the first suction pipe urges the tip to the pump suction port side of the first submersible pump, thereby An urging means for closely contacting the pump suction port of the first submersible pump;
In the state where the second submersible pump is installed at the bottom of the sewage tank, the second suction pipe urges the tip of the tip into the pump suction port side of the second submersible pump. A manhole pump system comprising an urging means for closely contacting the pump suction port of the second submersible pump. A contaminant separation device installed at the bottom of a sewage tank that stores sewage containing contaminants,
A first suction pipe whose tip is connected to a pump suction port of a first submersible pump that is installed in the sewage tank and has a predetermined contaminant passage property;
A second suction pipe whose tip is connected to a pump suction port of a second submersible pump having higher pump efficiency than the first submersible pump;
A strainer box having an internal space to which proximal ends of the first and second suction pipes are respectively connected, and a suction port for sucking sewage stored in the sewage tank into the internal space;
And a strainer that is disposed in a connection portion with the second suction pipe in the internal space of the strainer box and that prevents impurities from passing to the second suction pipe side. Contaminant separator. In the foreign matter separation device according to claim 5,
The strainer box has a substantially cylindrical shape including an upper surface and a lower surface facing in the vertical direction and a peripheral surface between the upper surface and the lower surface, and the suction port is formed on the lower surface,
The second suction pipe is connected to the strainer box at a substantially central position on the upper surface of the strainer box,
The first suction pipe is connected to a peripheral surface of the strainer box. In the foreign matter separation device according to claim 5 or 6,
Each of the first and second submersible pumps can be installed at the bottom of the sewage tank and pulled up from within the sewage tank,
In the state where the first submersible pump is installed at the bottom of the sewage tank, the first suction pipe urges the tip to the pump suction port side of the first submersible pump, thereby An urging means for closely contacting the pump suction port of the first submersible pump;
In the state where the second submersible pump is installed at the bottom of the sewage tank, the second suction pipe urges the tip of the tip into the pump suction port side of the second submersible pump. An alien substance separating apparatus comprising urging means for bringing the second submersible pump into close contact with a pump suction port.

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