JP5462026B2 - Forced drainage pump and forced drainage system - Google Patents

Description

  The present invention relates to a forced drainage pump for efficiently discharging filth and miscellaneous wastewater around the water of a building such as a building or a house. In particular, it can be easily retrofitted to existing equipment, and the degree of freedom of construction of the waterside equipment. The present invention relates to a forced drainage pump and a forced drainage system.

When designing and installing toilets, washrooms, kitchens, laundry areas, etc. installed in buildings such as buildings, houses, etc., create a gradient in the drain pipe (horizontal pipe) to be installed under the floor to reduce gravity. It is common to adopt a natural flow system that promotes the drainage that is used and transports it to an underground sewage tank via a collection pipe. However, in order to pipe a drainage pipe with a slope under the floor, it must be constructed within the height of the underfloor space of the frame or the height of the ceiling pocket. For this reason, the installation position of each drainage device such as a toilet bowl is subject to the restriction of the distance from the collecting standpipe. Alternatively, there is an inconvenience that it is necessary to secure a large space height in order to secure the height of the gradient of the drain pipe.
In addition, if the floor area of a building, etc. becomes larger and the water supply facilities diversify, the number of residential areas where the separation distance between the collecting pipe and the drainage device becomes longer will increase. Unless the height of the underfloor space and the height of the ceiling pocket are increased, it is difficult to secure the gradient from the drainage equipment. However, in recent designs of buildings and the like, there is a strong demand for reducing the space height as much as possible, making it difficult to match the demand for ensuring the slope of the drain pipe.

In order to deal with such problems, forced drainage pumps are connected to drainage pipes from toilets, sinks, sinks, washing machines, and other toilets installed in toilets, washrooms, kitchens, and laundry areas. In addition, it is effective to forcibly drain waste and miscellaneous wastewater through a horizontal piping path (Patent Document 1).
Japanese Patent Application Laid-Open No. 2004-151620 discloses a toilet having improved on-site workability by incorporating a pump for pumping and draining into the toilet itself in advance.
However, this pump for pumping and draining has a special structure in which the toilet and pump are unitized by placing the pump in close proximity in the space provided directly behind the bowl portion of the toilet and connecting it directly to the toilet. It cannot be applied to the construction of retrofitting to a dispatch drainage system by adding a pump to a toilet with a conventional structure. Moreover, since it is the structure which arrange | positions a storage tank and a pump in the slight space right behind back of the bowl part of a toilet bowl, only a small pump can be utilized and there exists a limit in the output obtained.
Moreover, since this pump is a direct connection type only for toilets, it is impossible to pump and discharge filth and miscellaneous wastewater from other drainage equipment to the collecting pipe using this pump.

JP 2005-105581 A

The present invention has been made in view of the above, and efficiently discharges filth and miscellaneous wastewater from drainage devices such as toilets, washstands, sinks and washing machines installed around the water in buildings and houses to the downstream side. It is an object of the present invention to provide a forced drainage pump and a forced drainage system that can be easily retrofitted to an existing toilet and the like, and can increase the degree of freedom of construction of a watering facility.
In addition, since piping extending from a plurality of drainage devices can be connected to a single forced drainage pump so that filth and miscellaneous drainage from various places can be pumped and drained, construction can be facilitated. Furthermore, even when clogging occurs due to foreign matter mixed in the drain pipe, the pump part can be easily disassembled, replaced, and cleaned, so clogging can be easily eliminated.

In order to achieve the above object, the forced drain pump according to the invention of claim 1 is a floor-mounted forced drain pump arranged between the inflow pipe and the drain pipe, and the output shaft protrudes from the lower part. A motor unit including a motor and an impeller fixed to the output shaft; and a pump casing connected to the inflow pipe and the drain pipe in a state of supporting the motor unit, and the pump casing includes: A large-diameter outer cylinder that is spaced from a hollow cylindrical inner trunk part that supports the motor in a watertight manner with the impeller contained therein, and a lower part of the inner trunk part. Part, an inflow nozzle and a drain nozzle provided in the outer body part and connected to the inflow pipe and the drain pipe, respectively, and a vent hole for communicating the space with the atmosphere, Corresponds below the impeller A volute part formed in the center, a volute suction port formed in the lower center of the volute part, and a discharge opening part formed in the side wall of the volute and communicating with the drain nozzle. A bottom space that is formed between the inner bottom surface of the portion and the lower portion of the volute portion and communicates with the inflow nozzle, and a side space that is communicated with the bottom space and formed on the outer diameter side of the volute portion. The side space is partitioned into a storage chamber provided on the inflow side and an air chamber provided on the discharge side, and at least two inflow nozzles are provided on the outer wall of the storage chamber. The air chamber is provided with an air pressure detection port communicating with the air pressure detector.
The pump casing has a double body structure of an inner body part and an outer body part, and a space as an air reservoir is provided between both body parts. Further, the space includes a side space and an air chamber, and the pump can be controlled to be turned on and off by utilizing a change in internal pressure in the air chamber.
Since the outer trunk portion is provided with a plurality of inflow nozzles, the number of inflow piping that can be connected to the forced drainage pump is increased, and the layout flexibility of the piping is increased.

The invention according to claim 2 is characterized in that a center portion of the volute portion is arranged to be displaced toward the drainage nozzle side with respect to a center portion of the outer body portion.
Since the center part of the inner body part and the center part of the outer body part are displaced, the outer diameter of the outer body part can be reduced, and the overall size can be reduced.
The invention of claim 3 is characterized in that a height level of the volute suction port is set lower than an opening lower end edge of the inflow nozzle.
It is possible to prevent water in the bottom space from flowing back to the inflow nozzle side (residual water in the inflow piping) when the pump is stopped.

The invention of claim 4 is characterized in that a through-hole communicating with the storage chamber is provided in the wall surface of the volute portion located in the outer diameter direction of the outer peripheral surface of the impeller.
It becomes possible to discharge the air accumulated in the volute part to the atmosphere through the storage chamber and the vent hole. In other words, when the discharge check valve for preventing backflow provided in the drain pipe is “closed” (when the pump is stopped), the air accumulated in the volute section is vented to the vent hole through the through hole. Therefore, the inflow of drainage from the inflow pipe is performed smoothly.
The forced drainage system according to the invention of claim 5 includes a plurality of drainage devices, a storage tank that receives drainage from each drainage device, and any one of claims 1 to 4 that receives drainage from the storage tank. The forced drainage pump described above is provided.

The forced drainage pump of the present invention is arranged by using the excess space on the floor surface around the drainage equipment such as a toilet, so that it is not necessary to provide a gradient in the drainage pipe, and the frequency at which the drainage pipe is clogged greatly. descend. In addition, there is a merit that maintenance of the pump and the pipe portion in an exposed state becomes easy.
Moreover, it is easy to install this motor by retrofitting the water around existing buildings, houses, etc. as well as new construction, and the drainage efficiency in the water can be improved.

It is a longitudinal cross-sectional view (AA sectional drawing of FIG. 3) which shows the structure of the forced drainage pump which concerns on one Embodiment of this invention. It is BB sectional drawing of FIG. It is a cross-sectional view of the forced drainage pump of the present invention. It is a top view which shows the piping state with respect to a forced drainage pump. (A) is an external view of the drainage pump unit which accommodated the forced drainage pump of this invention in the decorative box, and the storage tank unit which accommodated the storage tank in the decorative box, (b) is the exploded view. (A) And (b) is installation state explanatory drawing which shows the state which connected the drainage pump unit to the drainage pipe of the toilet bowl. It is the schematic which shows the example which has arrange | positioned the drainage pump unit of this invention to the drainage equipment provided in various places of a house. It is a longitudinal cross-sectional view which shows the state which connected the storage tank and the drainage pump unit to the drainage apparatus sequentially. (A) (b) And (c) is a top view which shows the example of a connection of the storage tank with respect to drainage equipment, and a drainage pump unit, respectively.

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.
1 is a longitudinal sectional view (sectional view taken along line AA in FIG. 3) showing a configuration of a forced drain pump according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line BB in FIG. FIG. 4 is a cross-sectional view of the forced drain pump of the present invention, and FIG. 4 is a plan view showing a piping state with respect to the forced drain pump.
The forced drainage pump 1 according to the present invention efficiently discharges filth and miscellaneous wastewater from drainage devices such as toilets, washstands, sinks and washing machines arranged around the water of buildings such as buildings and houses to the downstream side. As will be described later, it can be assembled in a narrow space around the drainage device by retrofitting or the like. And it is an on-floor installation type | mold arrange | positioned between the inflow piping 101 extended from the drainage apparatus installed on the floor surfaces 100, such as a building, and the drainage piping 102. FIG. In this example, a vibration-proof rubber 105 is disposed on the floor surface 100 to absorb and reduce vibration and noise generated by the pump.
The forced drain pump 1 includes a motor unit having a vertical motor 2 in which an output shaft 2a projects from the lower part, and an impeller 3 that rotates integrally with the output shaft by fixing the shaft center part to the output shaft 2a. 4 and a pump casing 20 that is connected to the inflow pipe 101 and the drain pipe 102 in a state where the motor unit 4 is supported.

The pump casing 20 is disposed with a space 50 between a hollow cylindrical inner barrel portion 21 that supports the motor 2 in a watertight manner while the impeller 3 is accommodated therein, and a lower portion of the inner barrel portion 21. A large-diameter outer body portion 40, an inflow nozzle 41 and a drain nozzle 42 which are provided on the outer body portion 40 and are connected to the inflow piping and the drainage piping, respectively, and a vent hole 45 for communicating the space 50 with the atmosphere, Is provided. The inner trunk portion 21 and the outer trunk portion 40 are integrated by, for example, integral molding.
The pump casing 20 of the present invention has a double body structure composed of an inner body part 21 and an outer body part 40, and is characterized by a structure in which a space 50 is formed between the inner body part 21 and the outer body part 40. It is. As will be described later, in this embodiment, the center portion C1 of the substantially cylindrical inner trunk portion 21 and the center portion C2 of the substantially cylindrical outer trunk portion 40 do not coincide with each other. Good.
The inner body portion 21 includes a volute portion 25 formed in a portion corresponding to the lower side from the outer diameter direction of the impeller so as to surround the impeller 3, and a volute suction port 26 formed in the lower center of the volute portion 25. And a discharge opening 27 a formed in the volute side wall 27 and communicating with the drain nozzle 42. Furthermore, the inner body portion 21 includes a bearing portion 30 that rotatably supports the output shaft 2 a of the motor, and an oil reservoir 31 that stores lubricating oil 32 supplied to the bearing portion 30.
The space 50 is formed between the inner bottom surface 40a of the outer body portion 40 and the lower portion of the volute portion, and communicates with the inflow nozzle 41, and communicates with the bottom space 51 on the outer diameter side of the volute portion. And a side space 55 formed so as to surround it.
The side space 55 is partitioned by a partition member 56 into one storage chamber 57 provided on the inflow side and two air chambers 58 provided on the discharge side.
At least two locations (three locations in the example of FIG. 4) and an inflow nozzle (inflow opening) 41 are provided on the outer wall of the storage chamber 57.

An air pressure detection port 58a communicating with an air pressure detector (not shown) is provided in the upper portion of the air chamber 58. The start switch (pneumatic switch) of the motor 2 is activated (on) when the air pressure detector detects that the air pressure in the air chamber 58 exceeds a predetermined specified value, and is turned off when the air pressure falls below the specified value. It is configured. When the drainage from the drainage device does not flow into the pump casing, the air pressure in the air chamber 58 is lower than the specified value, so the motor start switch does not operate and the motor is in the off state. . On the other hand, when the air pressure from the drainage device flows into the pump casing and the air pressure in the air chamber 58 rises and exceeds a specified value, the air pressure detector is activated and the start switch is turned on to start the motor. .
That is, the air chamber 58 functions as an air pressure holding source of the start switch for automatically operating the motor. By providing the air pressure detection port 58a on the ceiling of the air chamber 58, the air switch 58 is connected to an unillustrated start switch connecting pipe. Prevent infiltration of sewage. The reason for not using the liquid contact type sensor is to avoid a malfunction due to adhesion of dirt.

The pipes connected to the forced drain pump 1 according to the present embodiment need to be provided with a gradient in the downstream drain pipe by using an excess space on the floor surface around the drainage device such as a toilet. The frequency of drainage clogging is greatly reduced. In addition, there is an advantage that maintenance of the exposed motor and the piping portion is facilitated. Moreover, it is easy to install this motor by retrofitting with respect to water around existing buildings, residences, etc., and drainage efficiency in the water around can be enhanced.
Further, the forced drainage pump 1 is characterized in that the axial center portion C1 of the volute portion 25 is arranged so as to be displaced toward the drainage nozzle side (left side of the drawing) with respect to the center portion C2 of the outer trunk portion. . By configuring in this way, it becomes possible to secure the volume of the storage chamber 57 constituting the side space 55 larger than the volume of the air chamber 58, and as a result of increasing the area of the outer wall of the storage chamber, a plurality of The inflow nozzle 41 can be arranged (FIG. 4). By providing a plurality of inflow nozzles, it becomes possible to connect the pipes flexibly corresponding to the difference in the positional relationship between the discharge pipe (inflow pipe) 101 and the discharge pipe 102 of the drainage device. In addition, by providing multiple inflow nozzles on the outer periphery of the outer body, it is possible to collect the drainage from various drainage equipment in one place, and it is possible to construct the pipes in the shortest time, corresponding to the installation direction of the drainage equipment It becomes.
Further, since the protrusion amount of the outer body portion toward the outflow nozzle side where the air chamber 58 is present is reduced, the outer diameter of the outer body portion can be minimized as a whole, and the entire pump can be reduced in size.

The automatic operation on / off water level of the pump is as shown in FIG. 2, and the off water level is the volute inlet water level (air suction state) in order to prevent the occurrence of scum.
By setting the height level (water level when the pump is OFF) h1 of the volute suction port 26 to be lower than the height level h2 of the opening lower edge 41a of the inflow nozzle 41, the water in the bottom space 51 when the pump is stopped Can flow back to the inflow nozzle side (residual water in the inflow piping).
By providing a through hole 25a communicating with the storage chamber 57 in the uppermost portion of the volute 25, that is, on the wall surface of the volute positioned in the outer diameter direction of the outer peripheral surface of the impeller 3, air accumulated in the volute is stored in the storage chamber. It becomes possible to discharge to the atmosphere via the vent hole 45 via 57. That is, when the discharge check valve for preventing backflow provided in the drain pipe 102 is “closed” (while the pump is stopped), the air accumulated in the volute section is vented to the vent hole 45 through the through hole 25a. Since it comprised in this way, inflow of the waste_water | drain from the inflow piping 101 is performed smoothly.

Further, when an air lock occurs due to air suction during operation of the pump, the amount of drainage may suddenly change to zero. In the present invention, the air in the volute is discharged to the vent hole 45 through the through hole 25a. It is possible to eliminate the air lock without stopping the pump. That is, when an air lock occurs, light with a specific gravity gathers at the center of the impeller due to centrifugal separation by the rotating impeller 3 and becomes low pressure, and water with a specific gravity gathers at the outer diameter side and becomes high pressure. The pumping capacity of the wastewater by the pump is reduced. The air lock is canceled when the pump is stopped, but the lock state continues unless the pump is stopped. In the present invention, the through hole 25a is formed in the outer wall of the volute portion, and the vent hole 45 is provided in the upper part of the storage chamber 57 formed outside the outer wall, so that the air lock is eliminated without stopping the pump. Can do. As described above, according to the present invention, when the air lock is generated, the air staying in the shaft center portion of the impeller by the internal circulation of the drainage on the inflow side is gradually formed by forming the air flow toward the through hole 25a. The air can be released to the storage chamber 57 and the air lock can be released.
In addition, since the air pressure detection port 58a provided in the upper part of the air chamber 58 communicates with an air pressure detector (not shown), the air pressure in the air chamber 58 is reduced when the pump is stopped and the drainage in the volute portion is reduced. The air pressure detector is activated to stop the pump.
When the amount of drainage in the volute is below a predetermined value, the resistance against the rotation of the impeller decreases, so that the decrease in resistance is electrically detected and the power supply to the motor is turned off. May be.

In the present invention, since the heights of the ceiling surfaces of the inflow nozzle 41 (inflow pipe 101) and the outflow nozzle 42 (discharge pipe 102) are matched, air does not collect on the upper part of any nozzle when the pump is driven. . Therefore, there is no possibility that the air accumulated in any of the nozzles moves to the impeller side and causes an air lock or the like.
Since the impeller 3 is positioned below the ceiling surface of the inflow nozzle 41 (inflow pipe 101) and the discharge nozzle 42 (discharge pipe 102), air does not collect around the impeller.
Since the height position of the bottom surface 3a of the outer peripheral portion of the impeller 3 is set to the same height as the bottom surface of the through hole 25a or lower than the bottom surface of the through hole, waste water containing foreign matter enters the through hole 25a. It is possible to eliminate problems such as clogging caused by closing the cover.

Next, FIG. 5 (a) is an external view of a drainage pump unit in which the forced drainage pump of the present invention is accommodated in a cosmetic box and a storage tank unit in which a storage tank is accommodated in the cosmetic box. FIG. Is an exploded view thereof. 6 (a) and 6 (b) are installation state explanatory views showing a state in which the drainage pump unit is connected to the drainage pipe of the toilet, and FIG. 7 is a drainage pump unit of the present invention in the drainage equipment provided in various places of the house. It is the schematic which shows the example which has arrange | positioned. 8 is a longitudinal sectional view showing a state in which a storage tank and a drainage pump unit are sequentially connected to the drainage device. FIGS. 9A, 9B and 9C are respectively a storage tank and a drainage pump unit for the drainage device. It is a top view which shows the example of a connection.
The forced drain pump 1 of the present invention constructs a drain pump unit 65 by being housed in a decorative box 60 as shown in FIG. 5, and the drain pump unit 65 is installed in a floor space around a drainage device 80 such as a toilet. To do. In addition, a storage tank 70 is connected to the upstream side of the drainage pump unit 65 (between the drainage device and the forced drainage pump).
The storage tank 70 has an inflow side connection portion 71 connected to the drainage pipe of the drainage device 80 on the front surface, and an outflow side connection portion 72 for connecting to the inflow pipe on the drainage pump unit 65 side on the side surface. Have.
By making the opposing surfaces of the rectangular parallelepiped decorative box 60 and the rectangular parallelepiped storage tank 70 into the same shape that match each other, when they are combined, they can be configured as a thin rectangular parallelepiped as shown in FIG. It becomes possible to arrange in a narrow space around the toilet bowl or the like.
The storage tank 70 is disposed between the drainage device 80 and the forced drainage pump and temporarily drains the drainage device when the amount of drainage from the drainage device 80 may exceed the capacity of the forced drainage pump 1. And is used to limit the amount of time drainage to the forced drain pump 1. Accordingly, the storage tank 70 is not necessary when the amount of time drainage from the drainage device does not exceed the capacity of the forced drainage pump 1.

In the example of FIG. 6, the example which has arrange | positioned the drainage pump unit 65 and the storage tank 70 using the space normally formed behind the toilet bowl 80 is shown. According to this, floor / ceiling exposed piping or concealment piping is possible in a place where the drainage gradient cannot be obtained, and installation can be completed in a short time. Also, the removal work is easy. When clogging occurs due to contamination by foreign matter, it is possible to remove or replace the foreign matter by separating only the pump unit. Even in the case of using a small pipe (25 mm), the water brush effect and the scale clogging prevention effect due to the powerful drainage effect utilizing the suction force of the pump can be exhibited. Since the amount of water used for flushing toilet bowls can be reduced, the flush tank can be downsized. Furthermore, a sewage pit is not required.
The forced drainage pump 1 of the present invention is, for example, drainage treatment in a basement, renovation of kitchens and toilets, drainage pipe work accompanying renovation of stores and tenants, new installation of watering equipment for nursing care, filthy logistics sites in hospitals, extension It is very effective when installing temporary toilets such as water facilities at the time of expansion, employees at construction sites and event venues.
At this time, since a plurality of pipes can be connected to the forced drain pump 1, the degree of freedom in layout increases and the reservoir can be easily connected. Specifically, for example, the storage tank 70 is disposed behind the toilet bowl 80 as in the forced drainage system shown in FIGS. 9A and 9B, and forced drainage is performed on either side of the storage tank 70. An L-shaped connection to which the pump 1 is connected, or an I-shaped connection in which the toilet 80, the storage tank 70, and the forced drainage pump 1 are connected in a straight line as shown in (c) is possible.
By attaching a plurality of inflow nozzles to the storage tank 70 as shown in FIG.

As described above, in the forced drainage system according to the present invention, since a pipe from another drainage device is connected to a storage tank or a forced drainage pump arranged in the immediate vicinity of one drainage device such as a toilet, one forced drainage pump The drainage from a plurality of drainage devices can be discharged to the common drainage pipe 102 by using the output of.
The forced drainage pump or forced drainage system of the present invention can be used, for example, in a tenant building, when there is a need to install a sudden water supply in a renovation accompanying a tenant replacement, Drainage equipment can be installed without considering the positional relationship with the vertical pipe.

DESCRIPTION OF SYMBOLS 1 ... Forced drainage pump, 2 ... Motor, 2a ... Output shaft, 3 ... Impeller, 3a ... Bottom surface, 4 ... Motor unit, 20 ... Pump casing, 21 ... Inner trunk, 25 ... Volute part, 25a ... Through-hole, 27: Volute side wall, 27a ... Discharge opening, 30 ... Bearing, 32 ... Lubricating oil, 40 ... Outer body, 40a ... Inner bottom surface, 41 ... Inflow nozzle, 41a ... Opening lower edge, 42 ... Discharge nozzle, 42 ... Drain nozzle, 45 ... vent, 50 ... space, 51 ... bottom space, 55 ... side space, 57 ... storage chamber, 58 ... air chamber, 58a ... pneumatic detection port, 60 ... vanity box, 65 ... drainage pump unit , 70 ... Storage tank, 71 ... Inflow side connection part, 72 ... Outflow side connection part, 80 ... Drainage device (toilet), 100 ... Floor surface, 101 ... Inflow pipe, 102 ... Drainage pipe, 102 ... Drainage pipe, 105 ... Anti-vibration rubber

Claims (5)

A floor-mounted forced drainage pump that is placed between the inflow pipe and the drainage pipe,
A motor having an output shaft protruding from the lower part, and a motor unit including an impeller fixed to the output shaft;
A pump casing connected in communication with the inflow pipe and the drain pipe in a state where the motor unit is supported,
The pump casing is disposed with a space between a hollow cylindrical inner body portion that supports the motor in a watertight manner with the impeller housed therein, and a lower portion of the inner body portion. A large-diameter outer trunk, an inflow nozzle and a drain nozzle provided in the outer trunk and connected to the inflow pipe and the drain pipe, respectively, and a vent hole for communicating the space with the atmosphere,
The inner body portion includes a volute portion formed in a portion corresponding to the lower portion of the impeller, a volute suction port formed in a lower center of the volute portion, and a discharge formed in a side wall of the volute and communicating with a drain nozzle. An opening, and
The space is formed between an inner bottom surface of the outer body portion and a lower portion of the volute portion, and is formed on the outer diameter side of the volute portion, communicating with the bottom space, communicating with the inflow nozzle. A side space,
The side space is partitioned into a storage chamber provided on the inflow side and an air chamber provided on the discharge side,
At least two inflow nozzles are provided on the outer wall of the storage chamber,
The forced drainage pump according to claim 1, wherein the air chamber is provided with an air pressure detection port communicating with the air pressure detector.   2. The forced drain pump according to claim 1, wherein a center part of the volute part is arranged to be displaced toward the drain nozzle side with respect to a center part of the outer body part.   The forced drainage pump according to claim 1 or 2, wherein a height level of the volute suction port is set lower than an opening lower end edge of the inflow nozzle.   The forced drainage pump according to any one of claims 1 to 3, wherein a through hole communicating with the storage chamber is provided in a wall surface of a volute portion positioned in an outer diameter direction of the outer peripheral surface of the impeller. .   A plurality of drainage devices, a storage tank that receives drainage from each drainage device, and a forced drainage pump according to any one of claims 1 to 4 that receives drainage from the storage tank. A featured forced drainage system.

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