JP2018178482A - A pump device, a malodor preventing type drainage equipment and a pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the pump device that makes pump detachable from a piping of a water tank without entering a pump pit as much as possible.SOLUTION: A provided pump device that is disposed entirely outside the water tank in which a carrier fluid is stored comprises: a pump with casing, a suction piping connected to a suction side of the pump, and a suction piping connection part, wherein the pump has a suction port that opens vertically downward, the suction piping has a conduit that is located at an end on a pump side and opens vertically upward, and the suction piping connection part prevents the carrier fluid from leaking from the suction port in a state where the suction port and the conduit of the suction piping are connected.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a pump device, an offensive odor type drainage system, and a pump used for these.

  In general, in facilities where sewage, wastewater, or river water is temporarily stored in a water tank and drained by a pump, the liquid may contain waste and dirt. Especially in buildings with underground structures, not only sewage generated in the ground floor, but also sewage generated in the building is a large drainage tank or septic tank (also called pump pit or building pit) installed underground. It may be temporarily stored. Since these temporarily stored liquids are located below the public sewer pipe, they are pumped up to sewage by the pump installed in the pump pit and drained to the public sewer pipe through the sewage.

  FIG. 10 is a view schematically showing a drainage system formed in the underground part of the building 500. As shown in FIG. As shown in FIG. 10, the sewage discharge source of the building 500 may be located below the public sewer pipe 80. Conventionally, such dirty water and miscellaneous drainage (hereinafter referred to as dirty water etc.) and dirty water etc. generated in the building 500 are temporarily stored in a large drainage tank (pump pit) 85 installed further down through the inflow pipe 81. Be done. Thereafter, the sewage and the like are pumped to the sewage 91 by the drainage pump 90 installed in the drainage tank 85 and drained to the public sewer pipe 80 through the sewage 93. In addition, the sewage etc. which generate | occur | produce in the part more than the 1st floor of the building 500 may be directly drained to the sewage 91 by natural flow.

  In such equipment, the pump 90 is started when the water level in the drainage tank 85 reaches a predetermined water level. However, if the water level in the drainage tank 85 does not reach the predetermined water level and dirty water etc. remain in the bottom of the drainage tank 85 for a long time, decay progresses and the manhole etc. generates odor when discharged to the public sewer pipe 80 May.

  The above problem is remarkable because the area of the bottom of the water tank is large and the amount of residual sewage etc. is large due to the drainage tank 85 being too large. In order to improve this, in the drainage tank 85 shown in FIG. 10, the bottom plate 87 of the drainage tank 85 is provided with a downward slope toward the pump 90 or the recess 89 is provided in the bottom plate 87 of the portion where the pump 90 is installed. ing. In addition, the method of operating the pump 90 is improved, for example, the pump 90 is operated to the pump off water level WL2, and then the operation of the pump 90 is continued for a predetermined time to reduce the amount of residual wastewater as much as possible. ing.

  However, even if the improvement is made as described above, the amount of residual wastewater and waste water is still large, and it has not reached the point of suppressing the decay of waste water and wastewater. For this reason, a malodor preventing drainage system has been proposed in which a small water tank such as a small cylindrical water tank (barrel) is disposed in a large drainage tank (pump pit) (for example, Patent Document 1).

  On the other hand, in the case of a submersible pump that is often used for sewage and sewage applications and installed in a water tank, attachment and removal of the submersible pump to the discharge piping can be carried out without people entering the water tank. Removable pumps have been proposed which have a removable device which has made it possible. (For example, Patent Document 2)

Japanese Patent Application Laid-Open No. 2002-70142 Japanese Patent Application Laid-Open No. 7-119883

  In the above-mentioned malodor prevention drainage system, the diameter of the barrel is designed to match the diameter of the manhole so that the barrel can be carried into the pump pit through the manhole formed in the pump pit. Therefore, the maximum diameter of the barrel is limited, it is difficult for a plurality of people to enter the barrel, and the operation such as cleaning inside the barrel is complicated. Therefore, when maintaining the submersible pump, for example, the piping connected to the pump is removed, and the pump is pulled up from above the barrel. In the case of a submersible pump for dirty water used for manholes etc., the pump may be attached or detached depending on the attachment / detachment device, but it is a limited space where the height of the barrel and the ceiling height of the pump pit are close It is difficult to set up the detachable device.

  In addition, since an offensive odor or toxic gas may be generated in the pump pit where the water tank is disposed, when replacing or maintaining the pump, pull the pump out of the pump pit to place a person in the pump pit. There is a demand for replacing and maintaining the pump without entering the Therefore, a pump device for separating the drainage pump from the piping of the water tank and pulling it out of the pump pit is desired as much as possible without a person entering the pump pit.

  DESCRIPTION OF RELATED ART As a pump apparatus for isolate | separating a drainage pump from piping and raising it from a suction water tank, there exists a pump apparatus attachment / detachment device which makes attachment or detachment to discharge piping detachable. In these pump devices and attachment / detachment devices, due to the action of the discharge pressure of the pump at the time of operation of the pump, there is a possibility that the stable fixing can not be obtained only by the own weight of the pump and the sealing performance of the attachment / detachment device connection portion is not ensured. Therefore, in the removable pump of Document 2, the pump casing is closely housed in the removable cylindrical portion fixed to the pump pit by the sealing means, and the stable fixing of the pump and the sealing property are maintained to prevent water leakage. . As described above, a fixing device (for example, a detachable cylindrical portion or a mechanism for fixing and fixing the document 2) is required at the mounting and demounting portion of the pump casing and the discharge pipe, which complicates or enlarges the pump device.

  [Mode 1] According to mode 1, a pump device is provided that is entirely disposed outside the water tank in which the transport fluid is stored, and the pump device includes a pump and a suction pipe connected to a suction side of the pump. The suction port of the pump opens vertically downward, the pipe line located at the pump-side end of the suction pipe opens vertically, and the pipe line of the suction port and the suction pipe is connected And a suction pipe connection portion for preventing the carrier fluid from leaking from the suction port. Since the pressure of the transfer fluid at the suction port of the pump is only the pressure by the water level of the water tank connected to the suction piping, the pump's own weight can be used not only during stoppage of the pump but also during operation of the pump without using fasteners such as bolts. Alone can prevent the transport fluid from leaking from the suction port. This means that the pump can be easily connected to the suction pipe by using the suction pipe connection in the pump device. Therefore, since a bolt etc. are not used for connection of a pump, a pump can be attached or detached easily only by moving a pump up and down from the outside of a pump pit, without a person entering in a pump pit.

  [Mode 2] According to mode 2, in the pump device according to mode 1, the suction pipe connection portion is provided at a suction port of the pump. Thereby, in the state where the pump and the suction pipe were connected, the suction pipe connection portion can prevent the sewage from leaking from the suction port.

[Mode 3] According to mode 3, in the pump device according to mode 1, the suction pipe connection portion is attached to a suction port of the pump. Thereby, in the state where the pump and the suction pipe were connected, the suction pipe connection portion can prevent the sewage from leaking from the suction port.

  [Mode 4] According to mode 4, in the pump device according to mode 2 or mode 3, a suction port adapter is attached to the pump suction port. Thereby, the guide body according to the shape of the guide rail can be provided in the suction port adapter, and by replacing the suction port adapter, it is possible to provide a pump device compatible with various guide rails.

  According to the fifth aspect, in the pump device according to any one of the first to fourth aspects, at least one of the cylindrical portion of the suction pipe and the cylindrical portion of the suction pipe connection portion has a tapered portion. By this taper part, when connecting a pump to suction piping, the cylindrical part of suction piping connection part can be guided to the appropriate position of the cylindrical part of suction piping.

  [Mode 6] According to mode 6, in the pump device according to any one of modes 1 to 5, the suction pipe connection portion has a seal member between the end portion of the suction pipe and the suction pipe connection portion. By providing the seal member at the suction pipe connection portion, replacement of the seal member is facilitated.

  According to the seventh aspect, in the pump device according to any one of the first to sixth aspects, the cylindrical portion of the suction pipe is the pump in a state where the suction pipe is connected to the pump. It further has a saucer part formed so that a suction opening may be surrounded. Even if the pump is removed from the suction pipe in a state where the dirty water remains in the pump, the saucer part prevents the remaining liquid from spilling into the pump pit, and further returns it into the septic tank through the suction pipe it can.

  [Form 8] According to the form 8, in the pump device of the form 7, it has the return piping which connects the above-mentioned saucer part and the above-mentioned water tank. Thereby, when the pump is removed from the suction pipe, the waste water spilled on the saucer portion is returned to the water tank through the return pipe.

  According to the ninth aspect, in the pump device according to any one of the first to eighth aspects, a water level sensor disposed in the water tank, and a control device electrically connected to the water level sensor The controller is configured to emit a warning when the water level in the water tank is at a position higher than the water level corresponding to the opening of the suction pipe.

  [Mode 10] According to mode 10, in the pump device provided with the pump device according to any one of modes 1 to 9, the flexible discharge pipe connected to the discharge port of the pump is used. Have. This makes it easy to handle the piping when pulling up the pump from the pump pit.

  [Mode 11] According to mode 11, an offensive odor type drainage system is provided, and the offensive odor type drainage system includes the pump device according to any one of modes 1 to 10.

  According to the twelfth aspect, there is provided a method of constructing a pump apparatus installed in a pump facility in which a water tank and a pump apparatus are configured in a pump pit that defines an internal space. In the space, and having the step of arranging in the outside of the water tank in the pump pit, the suction port of the pump is fixed to the pump pit and connected with the suction piping connected to the outflow port of the water tank The suction pipe connection part is opened vertically downward in a state where the suction pipe connection part is attached to the suction pipe, and the pump-side end of the suction pipe is opened vertically upward; In the state where the pump and the suction pipe are connected, the opening of the suction pipe connection portion and the opening of the suction pipe are aligned, and the pump is moved in the vertical direction, whereby the suction pipe connection portion Removably constructed and said end portion of said suction pipe.

BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing which shows the whole structure of the drainage installation by one Embodiment. FIG. 5 is an enlarged cross-sectional view detailing the connection between the suction port of the pump and the suction line, according to one embodiment. It is a top view of the suction inlet adapter single-piece by one embodiment. It is sectional drawing cut out along the line segment 3B in FIG. 3A. FIG. 5 is an enlarged cross-sectional view detailing a portion of the connection between the pump suction and the suction piping, according to one embodiment. FIG. 5 is an enlarged cross-sectional view detailing a portion of the connection between the pump suction and the suction piping, according to one embodiment. FIG. 5 is an enlarged cross-sectional view detailing a portion of the connection between the pump suction and the suction piping, according to one embodiment. It is the schematic which looked at the state when moving a pump up and down direction from the perpendicular upper direction. FIG. 5 is an enlarged cross-sectional view detailing the connection between the suction port of the pump and the suction line, according to one embodiment. FIG. 5 is an enlarged cross-sectional view detailing the connection between the suction port of the pump and the suction line, according to one embodiment. It is a figure which shows roughly the drainage installation formed in the underground part of a building. BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing which shows the whole structure of the malodor prevention drainage apparatus by one Embodiment. FIG. 5 is an enlarged cross-sectional view detailing the connection between the suction port of the pump and the suction line, according to one embodiment. FIG. 5 is an enlarged cross-sectional view detailing the connection between the suction port of the pump and the suction line, according to one embodiment.

  Below, an embodiment of a pump device concerning the present invention is described with an accompanying drawing. In the accompanying drawings, the same or similar elements are denoted by the same or similar reference symbols, and redundant description of the same or similar elements may be omitted in the description of each embodiment. Also, the features shown in each embodiment can be applied to other embodiments as long as they do not contradict each other.

  FIG. 1 is a cross-sectional view showing an entire configuration of a pump installation 10 according to an embodiment.

  The drainage system shown in FIG. 1 temporarily stores dirty water, waste water, river water, etc. in a septic tank 12 which is an example of a water tank in the pump pit Pi, and drains it out of the pump pit Pi by the pump device 1. An opening (for example, a manhole) 24 is formed on the ceiling surface of the pump pit Pi, and a lid 25 is attached to the opening 24. As shown in FIG. 1, the pump facility 10 includes a waste water tank 12 provided in a pump pit Pi and a pump device 1 connected to the outlet 16 of the waste water tank 12, and further a discharge pipe 22. Equipped with

  Further, as shown in FIG. 1, the work space B is in communication with the pump pit Pi by the opening 24. The work space B is used as a space for maintenance of the motor pump 20 described later. In the present embodiment, since there is a possibility that toxic gas is generated by dirty water in the pump pit Pi, the motor pump 20 is periodically pulled up from the pump pit Pi to the working space B through the opening 24. To be maintained. In general, the work space B is used in combination with a machine room and the like, and is provided separately from living spaces such as a shop, a residence and a work place of a factory.

The pump device 1 includes a motor pump 20 and a motor pump 20 from an outlet 16 of the waste water tank 12.
And a suction pipe 23 forming a pipe line to the suction port. In addition, the suction piping 23 may not be directly connected to the outlet 16 of the waste water tank 12, but may be separately provided with a piping for connecting the suction piping 23 and the waste water tank 12.

  The motor pump 20 is disposed with the entire air exposed. The motor pump 20 includes a pump 20-1 provided with an impeller and a casing 20-4 (not shown), and a motor Mo. In addition, the pump 20-1 and the motor Mo are direct acting types that share a single shaft. The casing 20-4 is provided with a suction port 20-2 forming an opening of a suction flow path and a discharge port 26 forming an opening of a discharge flow path. When the impeller in the casing 20-4 is rotated by the motor Mo, the transport fluid of the pump 20-1 is sucked from the inside of the sewage tank 12 through the outlet 16 and the suction pipe 23 into the casing 20-4, It is discharged from the discharge port 26. The carrier fluid discharged from the motor pump 20 flows through the discharge pipe 22 and is discharged to the waste water 91. In addition, as an example of the pump 20-1 in this embodiment, it is a single-suction single-stage centrifugal pump that handles dirty water and waste water with a size of 20 mm or less of solids contained in the transport fluid.

  In the embodiment shown in FIG. 1, the motor pump 20 can be a tank-type submersible motor pump capable of continuous operation even in air. By using the submersible submersible motor pump, drainage can be performed even when, for example, dirty water overflows from the sewage tank 12 into the pump pits Pi and the motor Mo of the pump device 1 is submerged. However, if it is an environment where it is ensured that the motor Mo of the motor pump 20 is not submerged, a land pump without water resistance may be used. Further, in the embodiment shown in FIG. 1, a pump (not shown) and a pipe may be further provided for discharging the transport fluid which has leaked out of the pump pit Pi and out of the water tank 12 out of the pump pit Pi. .

  In the embodiment shown in FIG. 1, the water tank 12 is generally in the form of a substantially rectangular parallelepiped (box), and has an interior space defined by a bottom surface 12a, side surfaces 12b, and a top surface 12c. In one embodiment, the water tank 12 may be, for example, a small cylindrical water tank (barrel), or may be formed by combining a plurality of small panel members that can be carried into the pump pit Pi from the opening 24. Can be a small aquarium. The septic tank 12 can store water commensurate with the inflow of sewage depending on the size of the building and the amount of water used, and is formed so as to provide a reserve volume. An opening 13 is formed on the upper surface 12 c of the waste water tank 12, and the opening 13 may be covered with a lid 14. An inflow pipe 15 is inserted into the waste water tank 12. The inflow pipe 15 is a collecting pipe that is piped from a sewage discharge source, and is a pipe for causing sewage, etc., which is a transfer fluid of the motor pump 20, to flow into the dirty water tank 12. However, the inflow pipe 15 is not limited to one passing through the lid 14 of the water tank 12 and the lid 25 of the pump pit Pi as shown in FIG. 1, and penetrates the side surface 12 b or the upper surface 12 c of the water tank 12. It may be piped, or may be piped through the side surface or the upper surface of the pump pit Pi.

  As shown in FIG. 1, the waste water tank 12 is provided with an outlet 16 through which the stored sewage and the like are made to flow out, and the outlet 16 is connected with the pump device 1 via a suction pipe 23. In the embodiment shown in FIG. 1, the bottom surface 12a of the waste water tank 12 is provided with a recess, and an outlet 16 is provided in the vicinity of the bottom surface of the side surface 12b of the recess. Therefore, the dirty water and the like in the waste water tank 12 is guided to the recess, and when the drainage operation of the motor pump 20 is finished, the residual amount of the dirty water and the like is reduced to suppress the generation of rot and dirty odor in the dirty water tank 12 be able to. Further, in the present embodiment, the bottom surface 12 a of the waste water tank 12 is provided with an inclination such that the height is larger as it is farther from the outlet 16 and the height is smaller as it is closer to the outlet 16. As a result, the waste water and the like of the waste water tank 12 can be guided to the outlet 16 more effectively, and the pump 20-1 can be prevented from running idle, and the rot of dirty water remaining in the waste water tank 12 and the generation of odor Can be further suppressed.

  As mentioned above, a known submersible pump or a land pump can be used as the pump 20-1. As an example, the pump 20-1 can be a vertical pump. The vertical pump can be installed in a smaller footprint compared to the horizontal pump, and is effective for installation in a limited space in the pump pit Pi. Further, in the vertical shaft pump, the motor pump 20 is connected to the upper side of the suction pipe 23, so it is easy to move the motor pump 20 up and down to easily attach and detach it from the suction pipe 23. All act on the sealing water of the detachable portion to improve the sealing performance.

  The pump 20-1 is fluidly connected to the suction pipe 23 at the suction pipe connection. In one embodiment, an example of the suction pipe connection portion is a cylindrical portion 50-4 provided in the suction port adapter 50 described below. The suction port adapter 50 functions as a lifting device of the motor pump 20 together with a guide rail 60 described later by being attached to the suction port 20-2. The suction pipe 23 is fixed to the floor of the pump pit Pi or the like.

  FIG. 2 is an enlarged sectional view showing in detail the connection between the suction port adapter 50 and the suction pipe 23 in a state where the suction port adapter 50 is attached to the suction port 20-2 of the pump 20-1. As shown in FIG. 2, the upper end surface of the suction port adapter 50 is attached to the bottom surface of the pump casing 20-4. Further, the outer peripheral surface of the cylindrical portion 50-4 of the suction port adapter 50 and the inner peripheral surface of the suction pipe 23 are aligned and substantially in contact with each other. This is because the opening of the suction port 20-2 of the casing 20-4 and the opening located at the upper end of the suction port adapter 50 are aligned when the suction port adapter 50 and the suction pipe 23 are connected, and the suction port adapter This means that the opening of the 50 cylindrical portion 50-4 and the opening of the suction pipe 23 are aligned. Therefore, the cylindrical portion 50-4 provided in the suction port adapter 50 is a suction pipe connection portion, and in the state where the suction pipe connection portion is connected to the suction port 20-2 and the suction pipe 23, the transport fluid of the motor pump 20 Can be prevented from leaking from the suction port 23.

  FIG. 3A is a plan view of suction inlet adapter 50 alone, and FIG. 3B is a cross-sectional view taken along line 3B in FIG. 3A. The suction port adapter 50 includes a base 50-2 in contact with the pump casing 20-4 and a cylindrical portion 50-4 defining an opening coaxial with the suction port 20-2 of the pump 20-1. By attaching the base 50-2 to the pump casing 20-4 such that the suction port 20-2 of the pump 20-1 and the opening of the cylindrical portion 50-4 (FIG. 2) of the suction port adapter 50 are aligned, The suction port adapter 50 is attached to the pump casing 20-4. The attachment between the base 50-2 and the pump casing 20-4 can be performed by any means, for example, by fixing with bolts, welding or an adhesive. In order to align the suction port 20-2 of the pump 20-1 with the opening of the cylindrical portion 50-4 of the suction port adapter 50, a positioning structure of the pump casing 20-4 and / or the suction port adapter 50 May be provided.

As shown in FIG. 2, the suction pipe is fixed to the floor surface of the pump pit Pi so that the opening on the suction port adapter 50 side is directed vertically upward. The suction pipe 23 includes a cylindrical portion 23-2 configured to be able to insert the cylindrical portion 50-4 of the suction port adapter 50, and a flange portion 23-4 formed at the upper end of the cylindrical portion 23-2. . An O-ring 30 which is a sealing member may be disposed on the outer periphery of the cylindrical portion 50-4 of the suction port adapter 50. The O-ring 30 is sealed so that the transport liquid of the pump 20-1 does not leak from between the outer wall surface of the cylindrical portion 50-4 of the suction port adapter 50 and the inner wall surface of the cylindrical portion 23-2 of the suction pipe 23. . Here, the O-ring 30 needs to be replaced regularly during maintenance. The O-ring 30 can seal the transport liquid even if it is disposed on the inner wall surface of the cylindrical portion 23-2 of the suction pipe 23. However, for convenience of pulling up the motor pump 20 out of the pump pit Pi and replacing the O-ring 30 It is desirable to provide it on the side of the suction port adapter 50 attached to the motor pump 20. Then, the O-ring 30 can be replaced in a state where the pump 20 is pulled out of the pump pit Pi. In addition, suction port adapter 5
As long as 0 and the suction piping 23 can be sealed, another sealing member such as a gasket may be used instead of the O-ring 30 as shown in the embodiment of FIG. In addition, if the watertightness of the suction line of the pump 20-1 can be maintained by the cylindrical portion 50-4 and the suction piping 23 not only during the stop of the pump 20-1 but also during the operation of the pump 20-1, the seal member It does not have to be.

  As shown in FIG. 2, the inner wall surface near the end of the cylindrical portion 23-2 of the suction pipe 23 is provided with a tapered portion 23-6 so that the opening area becomes larger toward the end. When the motor pump 20 is moved downward from the opening 24 of the pump pit Pi by the tapered portion 23-6, the cylindrical portion 50-4 of the suction port adapter 50 and the cylindrical portion 23-2 of the suction piping 23 are installed. And the cylindrical portion 50-4 of the suction port adapter 50 is guided to the inside of the cylindrical portion 23-2 of the suction pipe 23 to appropriately connect the motor pump 20 to the suction pipe 23 can do.

  FIG. 4 is an enlarged cross-sectional view showing in detail a part of the connection between the suction port 20-2 of the motor pump 20 and the suction pipe 23 connected to the waste water tank 12 according to one embodiment. Also in the embodiment shown in FIG. 4, as in the embodiment of FIG. 2, the cylindrical portion 50-4 of the suction port adapter 50 is provided with an O-ring 30 which is a sealing member. In the embodiment of FIG. 4, not only the tapered portion 23-6 is provided in the cylindrical portion 23-2 of the suction pipe 23, but also the tapered portion 50 is also provided at the end of the cylindrical portion 50-4 of the suction port adapter 50. -6 is provided. Thereby, when connecting the motor pump 20 to the suction piping 23, the cylindrical part 50-4 of the suction inlet adapter 50 can be guided to the appropriate position of the cylindrical part 23-2 of the suction piping 23.

  FIG. 5 is an enlarged cross-sectional view showing in detail a part of the connection between the suction port 20-2 of the motor pump 20 and the suction pipe 23 connected to the waste water tank 12 according to one embodiment. In the embodiment of FIG. 5, unlike the embodiment of FIG. 2, a tapered portion 50-6 is provided at the end of the cylindrical portion 50-4 of the suction port adapter 50. Further, in the embodiment of FIG. 5, the O-ring 30 which is a sealing member is provided on the outer side of the end of the cylindrical portion 50-4 of the suction port adapter 50, and the transport fluid flowing through the suction port 20-2 in this portion. Is sealed. The sealing member may not be realized by the O-ring 30, and may be sealed by, for example, a gasket.

  FIG. 6 is an enlarged cross-sectional view showing in detail a part of the connection between the suction port 20-2 of the motor pump 20 and the suction piping 23 connected to the waste water tank 12 according to one embodiment. In the embodiment of FIG. 6, unlike the embodiment of FIG. 5, the cylindrical portion 23-2 of the suction pipe 23 is provided with a tapered portion 23-6. Further, in the embodiment of FIG. 6, an O-ring 30 which is a seal member is provided on an inner portion of an end portion of the cylindrical portion 50-4 of the suction port adapter 50, and the transport fluid flowing through the suction port 20-2 in this portion. Is sealed. The seal may not be realized by the O-ring 30, but may be sealed by a gasket or the like, for example.

As shown in FIGS. 2 to 6, in the present embodiment, the suction port 20-2 of the pump 20-1 opens vertically downward, and a pipeline located at the end of the suction pipe 23 on the pump 20-1 side Opens vertically upward. Furthermore, a suction pipe connection portion (cylindrical portion 50-4 or O-ring 30) that prevents the transport fluid from leaking from the suction port 20-2 in a state where the suction port 20-2 and the pipe line of the suction pipe 23 are connected. And the like). The pressure of the transport fluid at the suction port 20-2 of the pump 20-1 is only the pressure by the water level of the waste water tank 12, and the pressure accompanying the operation of the pump 20-1 is not applied like the discharge port. Instead, it is possible to seal the transport fluid passing through the suction port which is the connection portion between the suction pipe 23 and the motor pump 20 only by the weight of the motor pump 20. The same sealing effect can be obtained even if the seal member such as the O-ring 30 described above is provided or attached to the suction port of the casing 20-4 as a suction pipe connection. Furthermore, by sealing with a sealing member such as an O-ring 30, the watertightness during operation of the pump 20-1 is maintained by the alignment of the cylindrical portion 50-4 of the suction port adapter 50 and the cylindrical portion 23-2 of the suction piping 23. The carrier fluid can be prevented from leaking from the suction port even if it is not used.

  In the above-described embodiment, by using the suction pipe connection portion for the pump device 1, the motor pump 20 can be easily connected to the suction pipe 23. Since no bolt or the like is used for connection of the pump, the motor pump 20 can be easily attached and detached simply by moving the motor pump 20 in the vertical direction without a person entering the pump pit Pi.

  In one embodiment, as shown in FIG. 1, a guide rail 60 extending in the vertical direction is disposed in the pump pit Pi. Guide rail 60 can be formed of, for example, a metal pipe, and is fixed in advance to pump pit Pi using a screw or anchor bolt or the like, and at a position where motor pump 20 can be taken out from opening 24 of pump pit 24. Provided. In the embodiment of FIG. 1, two guide rails 60 are provided to guide the position of the motor pump 20 when moving the motor pump 20 in the vertical direction to be taken out from the pump pit Pi. In one embodiment, as shown in FIG. 3A, the suction inlet adapter 50 comprises a guide body 62. The guide body 62 engages with the guide rail 60 to move the motor pump 20 along the guide rail 60. The guide body 62 is formed in a shape corresponding to the shape of the guide rail 60. In the embodiment shown in FIG. 3A, the guide body 62 is provided with a concave shape, in which the cylindrical guide rail 60 can be engaged. The number of guide rails may be one or three or more. Moreover, the guide body 62 is provided according to the number of guide rails.

  FIG. 7 is a schematic view of a state in which the motor pump 20 is moved in the vertical direction as viewed from above in the vertical direction. When moving the motor pump 20 in the vertical direction, the motor pump 20 can be guided along the guide rail 60 by engaging the guide body 62 shown in FIG. 3A or 7 with the guide rail 60. When moving the motor pump 20 in the vertical direction, for example, a chain or the like is connected to the handle portion 70 (see FIG. 1) provided on the top of the motor Mo of the motor pump 20, and the motor using a crane or the like. The pump 20 may be moved vertically.

  As described above, since the motor pump 20 is attached and detached on the suction side, it can be installed on the suction pipe 23 only by its own weight without fixing it with a bolt or the like. Therefore, even when installing the motor pump 20 in the pump pit Pi, no tightening work with a bolt or the like is required. Therefore, the maintenance worker can pull up the motor pump 20 from the pump pit Pi without falling into the pump pit Pi. it can.

  Furthermore, as shown in FIG. 3A as one embodiment, the suction inlet adapter 50 may be provided with a guide body 62 engaged with the guide rail 60, or may be provided in the casing 20-4. When the motor pump 20 is operated, the motor pump 20 receives a force in the direction opposite to the rotation direction of the impeller of the motor pump 20. However, since the motor pump 20 is engaged with the guide rail 60 by the guide body 62, the motor pump 20 is prevented from receiving a force in the direction opposite to the rotation direction of the impeller and the motor pump 20 is rotated. be able to. In order to prevent the rotation of the motor pump 20, it is desirable that the guide rails 60 and the guide body 62 be disposed opposite to each other with respect to the rotation axis of the impeller of the motor pump 20.

Here, the shape of the guide rail 60 may differ depending on the installation site or the like. As shown in FIG. 3A, various guide rails 60 can be provided by changing the shape of the guide body 62 of the suction port adapter 50 by providing the guide body 62 in the suction port adapter 50 which is a separate part from the motor pump 20. Can correspond to the shape of Therefore, the suction port adapter 50 is attached to the suction port of the motor pump 20, and the suction pipe connection portion is provided on the suction port adapter 50, so that the guide body 50 matched to the shape of the guide rail 60 is used as the suction port adapter. Since it can provide, it can be set as the pump apparatus 10 which can respond to various guide rails 60 by replacing | exchanging the suction inlet adapter 50. FIG.

  In the embodiment described above, the cylindrical portion 50-4 which is the suction pipe connection portion is provided in the suction port adapter 50, but as another embodiment, the cylindrical portion 50-4 which is the suction pipe connection portion May be provided in the suction port 20-2 of the motor pump 20. Specifically, as shown in FIG. 13, the cylindrical portion 50-4 may be provided not at the suction port adapter 50 but at the suction port 20-2. The suction port 20-2 extends vertically downward to form a cylindrical portion 50-4 defining an opening coaxial with the suction port 20-2. The opening of the cylindrical portion 50-4 of the suction port 20-2 may be coaxially aligned with the suction port adapter 50, and the suction port adapter 50 may be attached to the pump casing 20-4.

  FIG. 8 is an enlarged cross-sectional view showing in detail the connection between the suction port 20-2 of the motor pump 20 and the suction pipe 23 connected to the waste water tank 12 according to one embodiment. The connecting portion shown in FIG. 8 is similar to the connecting portion shown in FIG. 2, but the flange 23-4 of the suction pipe 23 further extends in the radial direction and vertically upward to form the saucer portion 110. The saucer portion 110 shown in FIG. 8 extends from the flange 23-4 at the end of the suction pipe 23. Therefore, even if the motor pump 20 is removed from the suction pipe 23 in a state where the dirty water remains in the motor pump 20, the receiving portion 110 prevents the residual liquid from spilling into the pump pit Pi, and further, the suction pipe 23 can be returned to the tank 12.

  FIG. 9 is an enlarged cross-sectional view showing in detail the connection between the suction port 20-2 of the motor pump 20 and the suction pipe 23 connected to the waste water tank 12 according to one embodiment. Also in the embodiment shown in FIG. 9, the saucer portion 110 is formed in the same manner as the embodiment shown in FIG. However, unlike the saucer portion 110 of FIG. 8, the saucer portion 110 shown in FIG. 9 extends radially and upward from a position lower than the flange 23-4 of the suction piping 23. Further, in the saucer portion 110 shown in FIG. 9, an opening 112 is provided at the bottom of the saucer portion 110, and a return pipe 114 communicating with the water tank 12 from the opening 112 is provided. Therefore, the water which spills on the saucer portion 110 when the motor pump 20 is removed is returned from the opening 112 of the saucer portion 110 through the return pipe 114 to the waste water tank 12.

  In FIGS. 8 and 9, although the saucer portion 110 is provided in the connection structure shown in FIG. 2, for example, the saucer portion 110 is provided in another connection structure as shown in FIGS. It is also good.

  The explanation is returned to FIG. A discharge pipe 22 is connected to the discharge port 26 of the motor pump 20. Further, the discharge pipe 22 is provided with a backflow prevention valve 19. The backflow prevention valve 19 prevents dirty water from returning from the discharge pipe 22 to the motor pump 20 side. Since the motor pump 20 detaches the suction side, when pulling up the motor pump 20 from the pump pit Pi to the working space B, the pipe connected to the discharge side of the motor pump 20 is also pulled up together. The work space B is a work space for maintenance of the motor pump 20, and the ceiling height may be lower than the pump pit Pi. Furthermore, the vertical height of the discharge pipe 22 in the pump pit Pi is a work It may be higher than the ceiling height of space B. Therefore, by using at least a part of the discharge pipe 22 as a flexible pipe, it is possible to facilitate the handling of the pipe when pulling up the motor pump 20 from the inside of the pump pit Pi. As an example of the flexible discharge pipe 22, a bellows-type expansion and contraction tube, a flexible pipe made of rubber or resin, or the like may be used. Alternatively, the discharge pipe 22 may be configured by connecting a plurality of rigid pipes. In this case, when the motor pump 20 is pulled up from the pump pit Pi, the motor pump 20 can be pulled up stepwise while removing the pipe pulled up to the working space B in order.

  Further, an air valve 18 is provided on the motor pump 20 side of the backflow prevention valve 19 of the discharge pipe 22. A pipe may be provided so that the air which has escaped from the air valve 18 returns to the waste water tank 12. The piping for returning air to the sewage tank 12 is also preferably flexible piping.

  As shown in FIG. 1, a water level sensor 100 is disposed in the waste water tank 12. Any water level sensor can be used. As an example, in FIG. 1, three float switches 100a, 100b and 100c are arranged. The float switch 100 a is disposed at the water level H 1 that starts the motor pump 20. When the water level in the dirty water tank 12 rises above the water level H1 and the float switch 100a is turned on, the motor pump 20 is started and the dirty water in the dirty water tank 12 is drained. The float switch 100 b is disposed at the water level H 2 for stopping the motor pump 20. The water level H2 for stopping the motor pump 20 is determined to be higher than the upper end of the outlet 16 so as to prevent the motor pump 20 from sucking in air. When drainage by the motor pump 20 starts, the water level in the waste water tank 12 falls, and the water level falls below the stop water level H2, the motor pump 20 is stopped when the float switch 100b is turned off. The float switch 100c is disposed at a position lower than the connection surface connecting the motor pump 20 and the suction pipe 23 and at a water level H3 higher than the stop water level H2 of the pump. The water level H3 is a water level that permits the motor pump 20 to be removed from the suction pipe 23. For example, when the water level is higher than the connection surface connecting the motor pump 20 and the suction pipe 23, when the motor pump 20 is removed from the suction pipe 23, dirty water overflows from the suction pipe 23 and the inside of the pump pit Pi It gets dirty. If the water level is at a position lower than the connection surface connecting the motor pump 20 and the suction pipe 23, dirty water will not overflow the suction pipe 23 even if the motor pump 20 is removed from the suction pipe 23. However, since water remains in the discharge pipe 22 from the inside of the motor pump 20 to the front of the check valve 19, the water level H3 to be removed from the suction pipe 23 of the motor pump 20 is determined in consideration of the remaining water. Is desirable. The water level sensor 100 may not be the float switch as described above, but may be a water level sensor disposed at the bottom of the water tank 12 to measure water pressure, or may be any other water level sensor.

  The water level sensor 100 such as the float switches 100 a, 100 b, and 100 c described above and the motor Mo of the motor pump 20 are electrically connected to the control device 200. The controller 200 controls the motor Mo of the motor pump 20 in response to the output from the water level sensor 100 to control the operation of the motor pump 20. In one embodiment, the controller 200 is configured to issue an alert if the water level in the tank 12 is higher than H3. The warning may be displayed, for example, on a display device provided in the control device 200, or a warning sound may be emitted. The control device 200 can be a computer provided with a general signal processing device, a memory, an input / output mechanism, and the like. Control device 200 can be arranged, for example, in work space B, which is an upper floor of pump pit Pi, so as not to be flooded.

  FIG. 11 is a cross-sectional view showing the overall configuration of the pump installation 10 according to one embodiment. FIG. 11 shows a form in which the pump facility 10 is used for drainage of a basement portion of a building 500 such as a building. As shown in FIG. 11, the pump installation 10 can be used to discharge the wastewater generated at a position lower than the public sewer pipe 80 to the public sewer pipe 80. Sewage or the like generated in the building 500 is stored in the waste water tank 12 installed further below through the inflow pipe 15. Thereafter, the dirty water and the like are pumped up to dirty water 91 by the motor pump 20 and drained to the public sewer pipe 80 through the dirty water 93. In addition, the sewage etc. which generate | occur | produce in the part more than the 1st floor of the building 500 may be directly drained to the sewage 91 by natural flow.

In the embodiment shown in FIG. 11, the septic tank 12 is installed in a pump pit Pi which is a drainage tank, and the septic tank 12 is, for example, a small cylindrical water tank (barrel) or an assembled type panel tank. The waste water tank 12 may have a size or structure that can be carried into the pump pit Pi from the opening 24. In the embodiment shown in FIG. 11, since the septic tank 12 is a small water tank, when the drainage operation of the motor pump 20 is finished, the remaining amount of the filthy water etc. is reduced to decay the filthy water in the septic tank 12 and odor Odor control type drainage equipment that can suppress the occurrence of The other configurations can adopt the configurations described in conjunction with FIGS. 1 to 9 and FIG.

  In the embodiment of the pump device 1 described above, by attaching the suction port adapter 50 to the pump casing 20-4, the guide rail 60 can be used in attaching and detaching the motor pump 20 and the suction pipe 23. As another embodiment, for example, if the ceiling height of the pump pit Pi is such that the position of the flange 23-4 of the suction pipe 23 can be visually confirmed from the work space B which is the work space, FIG. As shown, the motor pump 20 may be raised and lowered without using the guide rails 60. In this case, the suction pipe connection portion may be integrated with the pump casing 20-4 without using the suction port adapter 50.

  12 is between the suction port 20-2 of the motor pump 20 and the suction piping 23 connected to the waste water tank 12 according to one embodiment of the pump device 1 installed in the pump facility 10 of FIG. 1 and FIG. It is an expanded sectional view which shows a connection part in detail. As shown in FIG. 12, the suction port 20-2 of the pump 20 extends vertically downward, and is provided with a cylindrical portion 550-4 which is a suction pipe connection portion. As shown in FIG. 12, in a state where the suction port 20-2 of the motor pump 20 and the suction pipe 23 are connected, the opening of the cylindrical portion 550-4 and the opening of the suction pipe 23 are aligned, The pipe connection prevents the sewage from leaking from the suction port 20-2.

  As shown in FIG. 12, the suction pipe 23 is fixed to the floor surface of the pump pit Pi such that the opening on the pump 20-1 side is directed vertically upward. The suction pipe 23 includes a cylindrical portion 23-2 configured to receive the cylindrical portion 550-4 and a flange 23-4 formed at the upper end of the cylindrical portion 23-2. An O-ring 30 which is a sealing member may be disposed and attached to the outer periphery of the cylindrical portion 550-4. The O-ring 30 seals between the outer wall surface of the cylindrical portion 550-4 and the inner wall surface of the cylindrical portion 23-2 of the suction pipe 23, so that the sewage can be prevented from leaking from the suction port 20-2. The O-ring 30 may be disposed on the inner wall surface of the cylindrical portion 23-2 of the suction pipe 23. However, for the convenience of replacing the O-ring 30 by pulling up the motor pump 20 out of the pump pit Pi, the motor pump It is more desirable to provide in the cylindrical part 550-4 which is 20 sides. In addition, in order to seal the suction inlet adapter 550 and the suction piping 23, you may use other sealing members, such as not an O-ring 30 as is shown by embodiment of FIG. 12, but a gasket. In addition, if the watertightness of the suction line can be maintained by the cylindrical portion 550-4 and the suction pipe 23 not only during the stop of the pump 20-1 but also during the operation of the pump 20-1, the seal member may not be necessary. .

  As shown in FIG. 12, when the inner wall surface near the upper end portion of the cylindrical portion 23-2 of the suction pipe 23 is provided with a taper portion 23-6 so that the opening area becomes larger toward the outer wall end portion Good. When the motor pump 20 is moved downward from the opening 24 of the pump pit Pi by the tapered portion 23-6, the cylindrical portion 550-4 of the suction port adapter 550 and the cylindrical portion 23-2 of the suction piping 23 are installed. And the cylindrical portion 550-4 of the suction port adapter 550 is guided to the inside of the cylindrical portion 23-2 of the suction pipe 23 so that the motor pump 20 is properly connected to the suction pipe 23 can do.

Here, in the state where the motor pump 20 and the suction pipe 23 are connected, the alignment of the cylindrical portion 550-4 and the suction pipe 23 is loose, and the seal of FIG. O-ring 30, which is a member, can prevent sewage from leaking from suction port 20-2. Therefore, by attaching the O-ring 30, which is a sealing member, as a suction pipe connection portion, dirty water, which is a transport fluid, leaks from the suction port 20-2 in a state where the suction port 20-2 and the suction pipe 23 are connected. You can prevent.

  As a pump device 1 provided with the connection structure of the motor pump 20 and the suction pipe 23 shown in FIG. 12, the structure disclosed herein is the structure except that the suction port 20-2 is provided with the cylindrical portion 550-4. Or any other configuration may be employed. For example, the optional configuration of the cylindrical portion 50-4 in FIGS. 4 to 6 in FIG. 3B described with the suction port adapter 50 that can be attached to the above-described pump casing 20-4 is the cylindrical portion 550- shown in FIG. It is employable as the pump apparatus 1 provided with four. Moreover, the saucer part 110 demonstrated in FIG. 8 and FIG. 9 is applicable to the pump apparatus 1 shown in FIG. As described above, by providing the suction pipe connection portion at the suction port 20-2 of the motor pump 20, in a state where the suction port 20-2 and the suction pipe 23 are connected, the sewage as the transport fluid is the suction port 20- 2. It is possible to prevent leakage from 2 and separately provide a fixing device (for example, a detachable cylindrical portion of Document 2 or a mechanism for fixing a screed) separately to the detachable portion of the pump casing and the discharge pipe as in the prior art. Instead, the number of parts can be reduced.

  Although the embodiments of the present invention have been described above based on several examples, the above-described embodiments of the present invention are for the purpose of facilitating the understanding of the present invention, and are not intended to limit the present invention. . The present invention can be modified and improved without departing from the gist thereof, and the present invention naturally includes the equivalents thereof. In addition, any combination or omission of each component described in the claims and the specification is possible within a range in which at least a part of the above-mentioned problems can be solved, or in a range that exerts at least a part of the effect. It is.

H 1, H 2, H 3 ... Water level Mo ... Motor B ... Working space Pi ... Pump pit 1 ... Pump equipment 10 ... Pump equipment 12 ... Dirty water tank 13 ... Opening 14 ... Lid 15 ... Inflow pipe 16 ... Outflow port 18 ... Air valve 19 ... backflow prevention valve 20 ... motor pump 20-1 ... pump 20-2 ... suction port 20-4 ... casing 22 ... discharge piping 23 ... suction piping 23-2 ... cylindrical part 23-4 ... flange 23-6 ... ... Taper part 24 ... opening part 25 ... lid 26 ... discharge port 30 ... O ring 50 ... suction port adapter 50-2 ... base 50-4 ... cylindrical part 50-6 ... taper part 60 ... guide rail 62 ... guide body 70 ... Handle part 500 ... architecture 100a, 100b, 100c ... water level sensor 110 ... saucer section 112 ... opening 114 ... return pipe 200 ... control device 550 ... suction port adapter 55 0-4 ... cylindrical part

Claims (12)

A pump device entirely disposed outside a water tank in which a carrier fluid is stored,
With the pump,
Suction piping connected to the suction side of the pump;
Have
The suction port of the pump opens vertically downward,
A pipe line located at the end on the pump side of the suction pipe opens vertically upward,
In a state where the suction port and the pipe line of the suction pipe are connected,
A pump apparatus comprising: a suction pipe connection portion for preventing the carrier fluid from leaking from the suction port.   The pump apparatus according to claim 1, wherein the suction pipe connection portion is provided at the suction port.   The pump apparatus according to claim 1, wherein the suction pipe connection portion is attached to the suction port. The pump apparatus according to claim 2 or 3, wherein
The suction port is
A pump device characterized in that a suction port adapter is attached. The pump device according to any one of claims 1 to 4, wherein
A tapered portion is provided on at least one of the cylindrical portion of the suction pipe and the cylindrical portion of the suction pipe connection portion,
Pump device. The pump apparatus according to any one of claims 1 to 5, wherein
The suction pipe connection portion has a seal member between the suction pipe and the suction pipe.
Pump device. A pump device according to any one of the preceding claims, wherein
The cylindrical portion of the suction pipe further includes a saucer portion formed to surround the suction port of the pump in a state where the pump is connected to the suction pipe.
Pump device. The pump apparatus according to claim 7, wherein
It has return piping which connects the above-mentioned saucer part and the above-mentioned water tank,
Pump device. A pump device according to any one of the preceding claims, wherein
A water level sensor disposed in the water tank;
And a controller electrically connected to the water level sensor,
The controller is configured to issue a warning if the water level in the water tank is at a position higher than the water level corresponding to the opening of the suction pipe.
Pump device. 10. A pump installation in which the pump apparatus according to any one of claims 1 to 9 is installed,
Having flexible discharge piping connected to the discharge port of the pump,
Pump equipment. It is an offensive odor type drainage system,
11. A pump device according to any one of the preceding claims.
Offensive odor type drainage system. A method of constructing a pump device installed in a pump installation in which a water tank and a pump device are formed in a pump pit which defines an internal space, comprising:
Placing the pump in the interior space of the pump pit and outside the water tank in the pump pit;
The suction port of the pump has a suction pipe connection portion fixed to the pump pit and connectable to a suction pipe connected to the outlet of the water tank,
The suction pipe connection of the pump opens vertically downward in a state of being attached to the suction pipe,
The pump-side end of the suction pipe opens vertically upward,
In the state in which the pump and the suction pipe are connected, the opening of the suction pipe connection and the opening of the suction pipe are aligned;
By moving the pump in the vertical direction, a suction pipe connection portion and the suction pipe are configured to be detachable.
How to build a pump device.

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