JP5221206B2 - Drainage pump equipment - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a drainage pump device configured by installing a submersible pump and a discharge pipe connected to a discharge port of the submersible pump in a tank such as a sewage drainage tank, and in particular, foreign matter accumulated at the bottom of the sewage drainage tank. It is related with the drainage pump apparatus suitable for discharging | emissioning out of a water tank efficiently and preventing the bad smell by a foreign material.

  For example, in a sewage drainage tank such as a manhole arranged at an appropriate position of a sewage flow pipe system connecting a sewage generation source and a sewage treatment plant, a drainage pump device for discharging the sewage in the sewage drainage tank to the outside is installed. In this type of drainage pump device, it is required to discharge the sewage in the sewage drainage tank without stagnating and accumulating foreign substances that cause malodor at the bottom of the sewage drainage tank.

Conventionally, in order to meet such demands, for example, a spiral concave portion that generates a swirling flow is provided at the bottom of a sewage drain tank, and the suction port of the suction portion that extends downward is located in the concave portion. A pump is installed, and in accordance with the operation of the submersible pump, the sewage in the sewage drainage tank is drained while sucking into the sewage in the sewage drainage tank and generating a swirling flow. Has also been proposed (see, for example, Patent Document 1 and Patent Document 2).
JP 2004-52396 A Japanese Patent Laid-Open No. 9-209992

  In the conventional drainage pump device, in order to generate a swirling flow at the bottom of the sewage drainage tank with the operation of the submersible pump, it is necessary to form a spiral recess in the bottom. The spiral recess formed in the bottom of the sewage drainage tank has a special shape suitable for generating swirling flow such as sewage. Therefore, it is necessary to prevent the foreign matter that stays and accumulates on the outer periphery of the bottom of the water tank from being effectively discharged because the generation of swirling flow due to suction of sewage or the like is reduced.

  For this reason, there is a problem that not only the structure of the drainage pump device becomes complicated, but also the manufacture is difficult and the production cost is expensive. In addition, if a spiral concave portion for generating a swirling flow is formed at the bottom of the water tank, the bottom surface of the water tank becomes uneven, and there is a problem that the construction becomes difficult and the construction becomes difficult.

  The present invention has been made in view of the above points, and with a relatively simple configuration, a stable swirling swirl suction flow is generated at the bottom of the water tank by suction of sewage from the suction port associated with the operation of the submersible pump. An object of the present invention is to provide a drainage pump device that effectively discharges foreign matter to the outside of the water tank along with this swirling suction flow, and prevents foreign matter that causes bad odor from staying and accumulating at the bottom of the water tank. And

In order to solve the above-described problems, an aspect of the present invention provides a drainage pump apparatus configured by installing a submersible pump and a discharge pipe connected to a discharge port of the submersible pump inside the tank. At a position surrounding the suction port of the pump, the distance between the spiral protrusion and the suction port of the submersible pump is from the outer peripheral side of the bottom of the water tank toward the suction port of the submersible pump. The water tank bottom is formed so that at least a part of the outer peripheral side becomes higher toward the outer peripheral end, and is the same as the top of the spiral ridge at the outer peripheral end position. The drainage pump device is configured to have a height .

  As described above, in the position surrounding the suction port of the submersible pump at the bottom of the water tank, the distance between the spiral protrusion and the suction port of the submersible pump is less When the submersible pump is operated and the sewage in the water tank is sucked from the suction port by arranging it so that it becomes small for a while toward the suction port of the pump, the stable spiral suction along the spiral protrusion A swirling flow is generated, and foreign substances that cause bad odor are discharged out of the water tank along with the suction swirling flow.

Another aspect of the present invention is a drainage pump device configured by installing a submersible pump and a discharge pipe connected to a discharge port of the submersible pump inside the water tank, and around the suction port of the submersible pump at the bottom of the tank The distance between the spiral ridge and the suction port of the submersible pump is temporarily reduced from the outer peripheral side of the bottom of the water tank toward the suction port of the submersible pump. arrangement, and the height from the water tank bottom portion of the spiral ridges may drainage pump apparatus characterized by towards the inlet near the water pump from the outer peripheral side of the water tank bottom portion is set to be higher It is .

  According to a preferred aspect of the present invention, in the drainage pump device, the spiral protrusion is formed in advance in a predetermined spiral shape and attached to the water tank bottom, or formed integrally with the water tank bottom. Features.

Another aspect of the present invention is a drainage pump device configured by installing a submersible pump and a discharge pipe connected to a discharge port of the submersible pump inside the water tank, and around the suction port of the submersible pump at the bottom of the tank The distance between the spiral ridge and the suction port of the submersible pump is temporarily reduced from the outer peripheral side of the bottom of the water tank toward the suction port of the submersible pump. arrangement, and the tub bottom is divided over the boundary and discharge piping side bottom of the pump inlet side the pump inlet side bottom and the discharge piping side is set higher than the pump suction side bottom of the The discharge pipe side bottom is a drainage pump device characterized in that it is set so as to increase for a while as it goes away from the boundary.

  According to the present invention, the spiral ridge is positioned at a position surrounding the suction port of the submersible pump at the bottom of the aquarium so that the distance between the spiral ridge and the suction port of the submersible pump is from the outer peripheral side of the bottom of the aquarium. When the submersible pump is operated by placing it so that it becomes smaller toward the suction port of the submersible pump for a while, a stable spiral suction swirling flow is generated along the spiral protrusion, and along with this suction swirling flow, Thus, foreign matter is sucked into the suction port of the submersible pump and discharged out of the water tank. For this reason, the foreign material which causes a bad odor does not stay or accumulate in the bottom part of a water tank. Moreover, by attaching a spiral ridge that has been previously formed into a predetermined spiral shape to the bottom of the water tank, or by forming a spiral ridge at the bottom of the water tank integrally with the bottom of the water tank, the spiral ridge is formed at the bottom of the water tank. The arrangement is relatively simple, the construction is relatively simple, the cost is low, and the construction is easy. In particular, workability is further improved in residential drainage in which the bottom of the water tank is nearly flat.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, the same or corresponding members are denoted by the same reference numerals, and redundant description is omitted.

  1 and 2 are diagrams showing a configuration of a drainage pump device according to an embodiment of the present invention, in which FIG. 1 is a plan sectional view and FIG. 2 is a longitudinal sectional view. As shown in FIGS. 1 and 2, the drainage pump device of this example is applied to, for example, a sewage drainage tank 1 installed at an appropriate place in a sewage flow piping system that connects a sewage generation source and a sewage treatment plant. A pump mounting seat 3 for installing the submersible pump 2 is provided at the bottom of the sewage drain tank 1, and the submersible pump 2 is connected to the pump mounting seat 3 via a pump mounting attachment / detachment device 4. Is installed with its suction port 2a facing downward. In this example, two submersible pumps 2 are installed and can be operated alternately. At the position of the bottom of the sewage drain tank 1 around the suction port 2a of each submersible pump 2, a spiral ridge 5 having a configuration described in detail later is installed.

  The lower ends of the discharge pipes 6a are respectively connected to the discharge ports extending in the horizontal direction of the submersible pumps 2, and the discharge pipes 6a extend upward in the vertical direction. The discharge pipe 6 a communicates with a common discharge pipe 6 b that reaches the upper peripheral wall of the sewage drain tank 1. With such a configuration, the sewage in the sewage drainage tank 1 sucked from the suction port 2a by the operation of the submersible pump 2 is discharged to the outside of the sewage drainage tank 1 through the discharge pipes 6a and 6b.

  Each discharge pipe 6a is provided with a check valve 7 to prevent the sewage from flowing backward from the external discharge pipe side when the submersible pump 2 is stopped. In addition, although illustration is abbreviate | omitted, at the time of the driving | operation start of the submersible pump 2, it accumulates in the discharge pipe 6a etc. which are located upstream from the non-return valve 7 (submersible pump 2 side). An air vent valve is provided for allowing air to escape to the outside of the discharge pipe 6a.

  A suspension chain 9 is attached to the top of the submersible pump 2, and a guide pipe 8 extending in the vertical direction is provided in the pump attachment / detachment device 4. Thus, the submersible pump 2 can be installed at a predetermined position in the sewage drainage tank 1 by moving the guide pipe 8 up and down with the submersible pump 2 suspended through the suspension chain 9. It has become.

As shown in FIG. 1 and FIG. 2, spiral ridges 5 are respectively arranged at the bottom of the sewage drainage tank 1 so as to surround each submersible pump 2. FIG. 3 is a plan view showing a planar arrangement configuration of the bottom of the sewage drain tank 1 and the spiral ridge 5, and FIG. 4 is a view taken in the direction of arrows AA in FIG. 3. As shown in FIG. 3, two spiral ridges 5 extending in a hyperbolic spiral shape with the centers O ₁ and O 2 of the suction ports 2 a and 2 a of the two submersible pumps 2 and ₂ as the spiral centers, respectively. 5 is arranged at the bottom of the sewage drain 1. That is, the distance L from the center O ₁ of the suction port 2 a of one submersible pump 2 to the one spiral protrusion 5 surrounding the submersible pump 2 is from the bottom outer peripheral side of the bottom of the sewage drain tank 1. It is set to become smaller for a while toward the suction port 2a of the submersible pump 2. Similarly, the distance to the center O ₂ of the other spiral ridges 5 of the other of the water pump 2 inlet 2a also to the suction port 2a of the bottom outer periphery of the water from the side pump 2 at the bottom of the sewage drain tank 1 It is set to become smaller for a while.

  As shown in FIG. 4, the central region 1 a of the bottom surface of the sewage drain 1 is formed flat (horizontal), and the outer peripheral region 1 b is an inclined surface having a high outside and a low inside. And the top part of the spiral ridge part 5 becomes the same as the top part of the height spiral ridge part 5 in the outer peripheral end position of the outer peripheral part area | region 1b of the bottom face of the sewage drain tank 1 as a whole. Yes. The height H of the spiral ridge 5 from the bottom surface of the sewage drain tank 1 is set to be low for a while toward the outside in the outer peripheral region 1b and high in the central region 1a where the suction port 2a of the submersible pump 2 is located. Has been.

  5 and 6 show a drainage pump device according to another embodiment of the present invention. The drainage pump apparatus shown in FIGS. 5 and 6 is different from the drainage pump apparatus shown in FIGS. 1 and 2 as follows.

  That is, the bottom part of the sewage drainage tank 1 is located on the discharge pipe side bottom part 10 located on the discharge pipe 6a side and the pump suction port 2a side by the boundary 12 extending in the diametrical direction through substantially the center of the bottom part. The pump suction port bottom portion 11 is divided, and the discharge pipe side bottom portion 10 is set higher than the suction port side bottom portion 11. Then, the suction port 2a of each submersible pump 2 is opened in the horizontal direction at the pump suction port bottom 11 which is lowered by one step, and around the suction port 2a of each submersible pump 2 of the pump suction port bottom 11 The spiral ridge 5 is arranged at a position surrounding the hyperbolic spiral. The pump suction port 2a may be formed in a nozzle shape and extended downward.

  Further, as shown in FIG. 6, the discharge pipe side bottom portion 10 is set so that the portion in contact with the boundary 12 is the lowest, and a flat portion having a predetermined width is placed and becomes higher for a while as the distance from the boundary 12 increases. 5 and 6 show an inlet 13 through which sewage flows into the sewage drain 1.

  The spiral ridge 5 in the drainage pump device of each of the above embodiments is attached by means of an anchor bolt or the like provided on the bottom surface of the sewage drain 1 with the spiral ridge 5 formed in advance in a predetermined spiral shape. This makes it easy to install. The spiral protrusion 5 may be adhered to the bottom surface of the sewage drain tank 1 with an adhesive or the like. Further, for example, when the bottom of the sewage drain tank 1 is made of fiber reinforced plastic, the spiral ridge 5 formed in a predetermined spiral shape on the bottom surface of the sewage drain tank 1 is adhered with an adhesive or spirally. The protrusion 5 may be formed integrally with the bottom of the sewage drain tank 1. Further, when the sewage drain tank 1 is made of concrete, the spiral protrusion 5 may be formed integrally with the sewage drain tank 1.

  When the bottom of the sewage drainage tank 1 is made of fiber reinforced plastic and the bottom of the fiber reinforced plastic is installed on the cylindrical part of the concrete sewage drainage tank 1 as a retrofit, the spiral ridge 5 is You may manufacture integrally with this fiber reinforced plastic bottom part.

  As in the drainage pump device of each of the above embodiments, the bottom of the sewage drainage tank 1 extends in a hyperbolic spiral shape at a position surrounding the suction port 2a around the suction port 2a of each submersible pump 2. When the submerged pump 2 is operated by arranging the spiral ridge 5 and the sewage in the sewage drainage tank 1 is sucked from the suction port 2a, the bottom of the sewage drainage tank 1 is along the spiral ridge 5 Thus, a suction spiral flow is generated which is spiral and sucked into the suction port 2a of the submersible pump 2 at the center of the spiral. Since this suction spiral flow is a spiral flow formed by being guided by the spiral protrusion 5, it becomes a stable spiral flow. Therefore, riding on this spiral flow, foreign matter and the like are sequentially sucked into the submersible pump 2 from the suction port 2 a of the submersible pump 2 and discharged to the outside of the sewage drainage tank 1. For this reason, the foreign material etc. which cause generation | occurrence | production of a bad odor do not stay or accumulate in the bottom part of the sewage drainage tank 1. FIG.

  As described above, according to the drainage pump device according to the present invention, the spiral protrusion 5 need only be provided at the bottom of the sewage drainage tank 1, so that the sewage drainage tank 1 can be Compared with the provision of a spiral recess that generates a swirling flow at the bottom, a stable spiral flow can be generated with a simple configuration. For this reason, the sewage drainage pump apparatus which the foreign material which causes a bad odor does not accumulate or accumulate in the bottom part of a sewage drainage tank can be provided at low cost.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims and the technical idea described in the specification and drawings. Can be modified. In addition, any shape, structure, or material not directly described in the specification and drawings is within the scope of the technical idea of the present invention as long as the effects and effects of the present invention are exhibited.

  For example, in the above embodiment, an example in which the drainage pump device is configured by installing two submersible pumps in the sewage drainage tank 1 is shown. However, the number of submersible pumps is one or three or more. Good. In the above embodiment, the drainage pump device is applied to the sewage drainage tank installed in the appropriate place of the sewage piping system connecting the sewage generation source and the sewage treatment plant. A drainage pump device may be applied to the water tank. In the case of a house drainage tank, the bottom of the water tank is close to a flat shape, so that workability is improved.

It is a plane sectional view showing composition of a drainage pump device concerning an embodiment of the invention. It is a longitudinal section showing the composition of the drainage pump device concerning an embodiment of the invention. It is a top view which shows the plane arrangement structure of the bottom part of a sewage drainage tank of the drainage pump apparatus shown in FIG.1 and FIG.2, and a spiral protrusion. It is an AA arrow line view of FIG. It is a plane sectional view of the drainage pump device concerning other embodiments of the present invention. It is a longitudinal cross-sectional view of the drainage pump apparatus which concerns on other embodiment in this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sewage drainage tank 2 Submersible pump 2a Pump suction port 3 Pump mounting seat 4 Pump mounting attachment / detachment device 5 Spiral ridge 6a, 6b Discharge piping 7 Check valve 8 Guide pipe 9 Suspension chain 10 Discharge piping Side bottom 11 Pump inlet side bottom 12 Boundary 13 Inlet

Claims (4)

In the drainage pump device configured by installing a submersible pump and a discharge pipe connected to a discharge port of the submersible pump inside the water tank,
At the position surrounding the suction port of the submersible pump at the bottom of the aquarium, the distance between the spiral ridge and the suction port of the submersible pump is such that the distance between the spiral ridge and the suction port of the submersible pump is greater than that of the bottom of the aquarium. towards the suction inlet arranged to briefly reduced,
The water tank bottom is formed such that at least a part on the outer peripheral side becomes higher toward the outer peripheral end, and is configured to be the same height as the top of the spiral ridge at the outer peripheral end position. drainage pump apparatus characterized by there. In the drainage pump device configured by installing a submersible pump and a discharge pipe connected to a discharge port of the submersible pump inside the water tank,
At the position surrounding the suction port of the submersible pump at the bottom of the aquarium, the distance between the spiral ridge and the suction port of the submersible pump is such that the distance between the spiral ridge and the suction port of the submersible pump is greater than that of the bottom of the aquarium. Place it so that it becomes smaller for a while toward the suction port of
The drainage pump device according to claim 1, wherein the height of the spiral protrusion from the bottom of the water tank is set higher in the vicinity of the suction port of the submersible pump than the outer peripheral side of the bottom of the water tank. Before Symbol spiral ridge in advance formed into a predetermined spiral or attached to the tub bottom, or waste water according to claim 1 or 2, characterized in that it is formed integrally with the tub bottom Pump device. In the drainage pump device configured by installing a submersible pump and a discharge pipe connected to a discharge port of the submersible pump inside the water tank,
At the position surrounding the suction port of the submersible pump at the bottom of the aquarium, the distance between the spiral ridge and the suction port of the submersible pump is such that the distance between the spiral ridge and the suction port of the submersible pump is greater than that of the bottom of the aquarium. Place it so that it becomes smaller for a while toward the suction port of
The water tank bottom is divided through a boundary into a pump suction port side bottom on the pump suction port side and a discharge pipe side bottom on the discharge pipe set higher than the pump suction side bottom, and the discharge pipe The drainage pump device, wherein the side bottom portion is set so as to increase for a while as the distance from the boundary increases.

Images