JP6916080B2 - Submersible pump device - Google Patents

Description

The present invention relates to a submersible pump device.

Conventionally, when the operation of the submersible pump body is started, the jet stream is discharged for a certain period of time to stir the inside of the water tank to wind up sand, sludge, suspended oil, scum, etc. in the water tank into the water, and the submersible pump body is pumped to wind them up. There is known a stirrer capable of sucking and discharging the material (see, for example, Patent Document 1).

Patent Document 1 describes a configuration in which a branch hole is formed through a pump casing accommodating an impeller and a stirring device is attached to an outer peripheral surface of the casing so as to communicate with the branch hole.

Then, in the invention of Patent Document 1, in order to prevent the foreign matter sucked into the submersible pump body from entering the stirring device, the foreign matter entering prevention member is arranged so as to close a part of the branch hole. There is. Specifically, as shown in FIG. 7 of Patent Document 1, a flat plate-shaped mounting member having a communication hole formed in the center and a rod-shaped foreign matter intrusion prevention member protruding from the inner peripheral edge of the communication hole toward the hole center. A member having a structure in which and is integrally formed is used.

Japanese Unexamined Patent Publication No. 2014-181618

By the way, in the submersible pump device, the size of the pump casing, that is, the dimension from the mounting seat where the stirrer is attached to the inner surface of the pump casing is changed due to the change in the specifications of the submersible pump, or the discharge flow in the pump casing. The flow may change.

In such a case, it is necessary to change the length of the foreign matter intrusion prevention member or change the tip shape of the foreign matter intrusion prevention member so as to follow the flow of the discharge flow, according to the specifications of the submersible pump. Therefore, it is necessary to prepare a plurality of types of foreign matter intrusion prevention members having different shapes.

However, although it is only necessary to change the shape of the rod-shaped foreign matter entry prevention member, in the invention of Patent Document 1, a member having a structure in which the attachment member and the foreign matter entry prevention member are integrated is used. Since it is used, it is necessary to replace all of these integrated members. Therefore, there is a problem that the component cost increases.

The present invention has been made in view of the above points, and an object of the present invention is to make it possible to easily replace only parts that need to be replaced in response to a change in the specifications of a submersible pump.

The present invention is a submersible pump provided with a submersible pump installed in the water tank and a stirrer for injecting at least a part of the discharge flow discharged from the submersible pump into the water tank to stir the inside of the water tank. The following solutions were taken for the equipment.

That is, in the first invention, the submersible pump is provided with a headrace that guides the discharge flow in a predetermined mainstream direction.
A branch hole for branching at least a part of the discharge flow from the submersible pump side to the agitator side is opened on the wall surface of the headrace.
The stirring device is attached to the opening position of the branch hole on the wall surface of the headrace.
A foreign matter regulating member for restricting foreign matter from entering the stirring device through the branch hole is provided.
The foreign matter restricting member is arranged so as to be detachably attached to the spacer portion sandwiched between the headrace and the stirring device and to close a part of the branch hole. It is characterized by having a regulatory unit.

In the first invention, the foreign matter regulating member has a spacer portion and a regulating portion. The spacer portion is sandwiched between the headrace and the agitator. The regulating portion is detachably attached to the spacer portion and is arranged so as to close a part of the branch hole.

With such a configuration, foreign matter that is sucked into the submersible pump and flows along with the discharge flow interferes with the regulation part, thereby restricting foreign matter from entering the stirring device and preventing the stirring device from being clogged with foreign matter. It can be suppressed.

And even if it becomes necessary to replace the foreign matter control member due to the specification change of the submersible pump, it is possible to deal with it by simply removing only the regulation part from the spacer part and replacing it with another regulation part with different dimensions and shape. It has become. In this way, the spacer portion can be shared regardless of the specification change of the submersible pump, so that the component cost can be reduced as a whole.

The stirring device is attached to the submersible pump body (for example, when it is attached to the pump casing accommodating the impeller in the submersible pump body) or when it is attached to the discharge pipe portion connected to the submersible pump body (for example). For example, there is a case where it is attached to a detachable connection pipe or the like used for installing a submersible pump main body).

Further, the discharge flow discharged from the impeller of the submersible pump body flows through the pump casing in the submersible pump body, passes through the discharge port of the submersible pump body, and is fixed installed in the water tank from the submersible pump body. The flow discharged into the discharge pipe and the flow flowing in the fixed discharge pipe are included.

Therefore, in the submersible pump device including both the submersible pump main body and the discharge pipe portion, the headrace that guides the discharge flow to flow in the predetermined mainstream direction is in the pump casing, in the detachable connection pipe, and in the fixed discharge pipe. Etc. are included.

The second invention includes a submersible pump installed in the water tank and a stirring device that injects at least a part of the discharge flow discharged from the submersible pump into the water tank to stir the inside of the water tank. It is a submersible pump device
The submersible pump is provided with a headrace that guides the discharge flow in a predetermined mainstream direction.
A branch hole for branching at least a part of the discharge flow from the submersible pump side to the agitator side is opened on the wall surface of the headrace.
The stirring device is attached to the opening position of the branch hole on the wall surface of the headrace.
A foreign matter regulating member for restricting foreign matter from entering the stirring device through the branch hole is provided.
The foreign matter restricting member is arranged so as to be detachably attached to the spacer portion sandwiched between the headrace and the stirring device and to close a part of the branch hole. Has a regulatory department
The spacer portion is formed with a communication hole that communicates with the branch hole and opens in the thickness direction, and a notch groove in which a part of the inner peripheral edge portion of the communication hole is cut out.
The regulating portion is characterized by having a protrusion portion that is sandwiched between the headrace and the stirring device in a state of being fitted in the notch groove.

The third invention is the first or second invention.
The regulating portion is characterized in that it is supported by the spacer portion in a cantilevered state and is composed of a rod-shaped member extending from the upstream side to the downstream side in the mainstream direction.

In the third invention, by supporting the regulating portion in a cantilevered state, the tip of the regulating portion (that is, the end corresponding to the downstream side in the mainstream direction) does not touch anywhere, and this tip is, so to speak. It is in a floating state.

As a result, even if a fibrous foreign matter is caught in the regulating portion, the foreign matter can escape from the tip of the regulating portion, so that the foreign matter is less likely to accumulate in the regulating portion and the branch hole is blocked. It can be suppressed.

The fourth invention is the first or second invention.
The regulating portion is characterized in that it is composed of a plate-shaped member arranged along the mainstream direction so as to cross the branch hole.

In the fourth invention, by arranging the plate-shaped regulating portion so as to cross the branch hole, the entry of foreign matter can be effectively suppressed.

The fifth invention is the fifth invention in any one of the first to fourth inventions.
The regulating portion is characterized in that it projects into the inside of the headrace.

In the fifth invention, by projecting the regulating portion inside the headrace, the foreign matter can interfere with the regulating portion before the foreign matter enters the branch hole, and the invasion of the foreign matter can be effectively suppressed. can.

According to the present invention, only the regulating portion of the foreign matter regulating member can be easily replaced according to the specification change of the submersible pump.

It is sectional drawing which shows the whole structure of the sewage pump equipment. It is a side view which shows the installation state in the water tank of a submersible pump device partially omitted. It is a top view of the submersible pump device. FIG. 3 is a sectional view taken along line IV-IV of FIG. It is a cross-sectional view taken along the line VV of FIG. It is an exploded perspective view which shows the structure of the foreign matter control member which concerns on this Embodiment 1. It is a perspective view which shows the structure of the foreign matter control member. FIG. 5 is a view corresponding to FIG. 5 of the submersible pump device according to the second embodiment. It is an exploded perspective view which shows the structure of the foreign matter control member. It is a perspective view which shows the structure of the foreign matter control member.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the following description of the preferred embodiment is essentially merely an example and is not intended to limit the present invention, its application or its use.

<< Embodiment 1 >>
As shown in FIG. 1, the submersible pump device 2 is arranged in the pump tank 1 as a water tank for relaying sewage having an inflow port 5 and a manhole 11. The submersible pump device 2 has a submersible pump main body 3 and a discharge pipe portion 60 including a fixed discharge pipe 6 fixedly installed in the pump tank 1. A stirring device 4 is attached to the submersible pump main body 3.

The submersible pump main body 3 has an electric motor 3b, and when the water level of the sewage flowing into the pump tank 1 from the inflow port 5 exceeds a predetermined operation level, until the water level drops to a predetermined stop level. , After being sucked into the submersible pump main body 3 by the operation of the submersible pump main body 3 by the operation of the electric motor 3b, it is discharged from the fixed discharge pipe 6.

For operation control of the submersible pump main body 3, an operation float switch 101, a stop float switch 102, and an abnormal water level alarm float switch 103 are provided in the pump tank 1, and a control panel 10 is provided above the pump tank 1. Has been done.

The submersible pump main body 3 to which the stirring device 4 is attached is lowered from the manhole 11 of the pump tank 1 to the bottom of the tank through the guide pipe 12, and is detachably installed in the pump tank 1 by the attachment / detachment device 13. In the following, the submersible pump main body 3 to which the stirring device 4 is attached may be simply referred to as the submersible pump main body 3.

The lid 14 of the manhole 11 and the submersible pump main body 3 are connected by an elevating chain 15 for raising and lowering the submersible pump main body 3. The elevating chain 15 is connected to the top surface of the submersible pump main body 3.

The attachment / detachment device 13 connects the submersible pump main body 3 to the fixed discharge pipe 6 fixed in the pump tank 1, and the submersible pump main body 3 is supported by the fixed discharge pipe 6 by this connection.

As shown in FIG. 2, the attachment / detachment device 13 is composed of a attachment / detachment connection pipe 22 having a attachment / detachment flange portion 16 and a hook 17, and a base end flange portion 18 of the fixed discharge pipe 6. The detachable connection pipe 22 is attached to the pump discharge pipe portion 25 in the pump casing 3a of the submersible pump main body 3.

The detachable connection pipe 22 constitutes a part of the discharge pipe portion 60. The hook 17 forms an engaging recess that opens downward between the hook 17 and the upper portion of the detachable flange portion 16. An engaging portion 18a that fits into the engaging recess is formed on the upper portion of the base end flange portion 18 of the fixed discharge pipe 6.

Then, the submersible pump main body 3 is supported by the fixed discharge pipe 6 by fitting the engaging recess and the engaging portion 18a, and the detachable flange portion 16 is fixed to the base end flange portion of the fixed discharge pipe 6 by the weight of the submersible pump main body 3. A moment of pressing against 18 works, and both are connected without a gap. A taper is formed on the contact surfaces of the hook 17 and the engaging portion 18a to guide the fitting and to tightly connect the detachable flange portion 16 and the base end flange portion 18.

As shown in FIG. 3, the pump casing 3a of the submersible pump main body 3 is integrally formed with a pump discharge pipe portion 25 projecting to the side thereof. A detachable connection pipe 22 is attached to the tip of the pump discharge pipe portion 25. The attachment / detachment connection pipe 22 is provided with a attachment / detachment flange portion 16 and a guide 23 that slidably engages with the guide pipe 12. There are two guide pipes 12, and two guides 23 are provided on the attachment / detachment connection pipe 22.

As shown in FIGS. 3 and 4, the submersible pump main body 3 is composed of a centrifugal pump, and the pump casing 3a is composed of a centrifugal pump casing having a pump chamber 27 for accommodating an impeller (not shown). The impeller (not shown) is configured as a non-clog type that allows foreign matter to pass through, so that the submersible pump body 3 has a passing particle size set to a predetermined value or more (for example, a pump diameter ratio of 100%). ing. It is also possible to use an impeller of a type different from the non-clog type.

A suction port 30 is opened at the lower part of the pump casing 3a. Further, the pump discharge pipe portion 25 is integrally formed in the pump casing 3a. A pump discharge port 26 communicating with the pump chamber 27 is opened in the pump discharge pipe portion 25.

The pump discharge port 26 has a fixed discharge pipe 6 when the submersible pump main body 3 (to be exact, the pump discharge pipe portion 25 of the pump casing 3a in the submersible pump main body 3) is connected to the fixed discharge pipe 6 by the attachment / detachment device 13. Communicate with the inside.

Further, as shown in FIGS. 3 and 5, the pump casing 3a is discharged from the pump chamber water flow (that is, the impeller) indicated by the arrow in FIG. 5 with respect to the pump discharge port 26 in the pump discharge pipe portion 25. A branch pipe portion 28 is integrally formed in the vicinity of the upstream side (clockwise in FIG. 5) of the discharge flow guided by the inner wall of the pump casing 3a that partitions the pump chamber.

In the branch pipe portion 28, a branch hole 29 is provided in which at least a part of the discharge flow is branched and flowed from the pump chamber 27 to the stirring device 4. The branch hole 29 is open to the inner wall that partitions the pump chamber 27 of the pump casing 3a. The branch pipe portion 28 can be provided at a position other than the vicinity of the pump discharge port 26 in the pump casing 3a.

The stirring device 4 discharges at least a part of the discharge flow of the submersible pump main body 3 into the tank at the start of operation of the submersible pump device 2. As shown in FIGS. 3 and 4, the casing 31 of the stirring device 4 includes a casing main body 45 attached to the branch pipe portion 28 of the pump casing 3a, and a diaphragm cover 46 coupled to the lower side thereof. A protective cover 47 is provided on the upper side of the casing main body 45.

As shown in the figure, in the casing 31 including the casing main body 45 and the diaphragm cover 46, the upper valve accommodating portion 51 accommodating the ball valve 49 and the oil as the lower working fluid are accommodated by the lower diaphragm 48. It is partitioned with the lower oil chamber 52. The lower diaphragm 48 is made of rubber, for example, and its peripheral edge is sandwiched between the casing main body 45 and the diaphragm cover 46.

On the other hand, a recess is formed in the top of the casing main body 45, and the peripheral edge of the upper diaphragm 53 made of, for example, rubber is sandwiched between the peripheral edge of the recess and the protective cover 47. The upper oil chamber 54 is formed by the recess of the casing main body 45 and the upper diaphragm 53. The protective cover 47 protects the upper diaphragm 53.

The lower oil chamber 52 and the upper oil chamber 54 communicate with each other by an oil passage 55 formed in the casing main body 45, the diaphragm cover 46, and the lower diaphragm 48. A regulating valve 56 for adjusting the oil flow rate of the oil passage 55 is attached to the diaphragm cover 46.

An inflow portion 32 for introducing the discharge flow that has passed through the branch hole 29 in the pump casing 3a of the submersible pump main body 3 into the casing main body 45 is provided above the casing main body 45. The casing main body 45 fastens the flange 32a formed at the upstream end of the inflow portion 32 of the casing main body 45 to the end surface (that is, the mounting seat 28a) of the branch pipe portion 28 of the pump casing 3a with respect to the pump casing 3a of the submersible pump main body 3. It can be attached by doing.

As will be described later, a spacer portion 71 of the foreign matter restricting member 70 is interposed between the flange 32a of the inflow portion 32 and the mounting seat 28a of the branch pipe portion 28 (see also FIGS. 5 and 6).

A jet passage 57 for communicating the pump chamber 27 of the submersible pump main body 3 and the valve accommodating portion 51 is formed inside the inflow portion 32, and the submersible pump main body 3 is formed via the jet passage 57. A jet flows into the valve accommodating portion 51 from the branch hole 29 of the pump casing 3a.

On the other hand, on the upper side of the casing main body 45 opposite to the inflow portion 32, an ejection portion 33 for ejecting the discharge flow flowing from the inflow portion 32 to the outside is provided. The ejection unit 33 includes an ejector mechanism 34 that generates an ejector effect in the valve accommodating portion 51 by a discharge flow flowing inside the valve accommodating portion 51, and an ejection port that ejects the discharge flow that has passed through the ejector mechanism 34 into the pump tank 1. It includes a nozzle 35 having 36. The nozzle 35 is attached to the downstream end of the ejector mechanism 34.

The ejector mechanism 34 has an outflow hole 58 that leads to the valve accommodating portion 51 and allows the discharge flow to flow out from the valve accommodating portion 51. A valve seat 59 on which the ball valve 49 can be seated is provided at the upstream end of the outflow hole 58.

In the ejector mechanism 34 configured in this way, when the discharge flow passes through the inside of the valve accommodating portion 51, pressure due to the discharge flow is generated in the valve accommodating portion 51, and the static pressure is reduced.

The diaphragm cover 46 constitutes the bottom wall of the casing 31, and the bottom wall is formed in a convex curved surface shape protruding downward so as to accommodate the lower diaphragm 48 along the bottom wall. Then, around the bottom wall, three legs 62 constituting an installation portion for allowing the stirring device 4 to stand on its own on a flat surface are provided (only one is shown in FIG. 4).

Inside one of the three legs 62, a downwardly bulging portion extending between the upper portion of the leg 62 and the convex curved bottom wall is formed, and the leg 62 and the bulging portion are formed. The mounting portion 63 of the adjusting valve 56 is formed by the above. That is, an adjusting valve mounting hole extending from the outer surface of the leg 62 to the bulging portion is formed, and the adjusting valve 56 is screwed into the mounting hole.

Next, the operation of the submersible pump device 2 will be described. Before starting the submersible pump body 3, as shown by the solid line in FIG. 4, the ball valve 49 in the stirring device 4 is on the lower diaphragm 48 below the valve accommodating portion 51, and the outflow hole 58 and the spout 36 are open. Is in a state of being.

In this state, when the submersible pump main body 3 is started by the operation of the electric motor 3b, the sewage is sucked from the suction port 30 of the pump casing 3a by the rotation of the impeller and discharged from the impeller.

A part of the discharge flow flows from the branch hole 29 into the valve accommodating portion 51 through the jet passage 57 of the stirring device 4, and is ejected from the jet port 36 of the nozzle 35 into the pump tank 1 through the outflow hole 58. .. As a result, the inside of the pump tank 1 is agitated.

Then, when the sewage passes through the valve accommodating portion 51, a negative pressure is generated in the valve accommodating portion 51. Due to this negative pressure, as the oil moves from the upper oil chamber 54 to the lower oil chamber 52, the upper diaphragm 53 is lowered, and the lower diaphragm 48 is biased so as to bulge upward, and the ball above it. Start pushing up the valve 49.

Approximately 20 to 50 seconds after the start of operation, the lower diaphragm 48 is completely inflated and protrudes upward, and as shown by a virtual line in FIG. 4, the ball valve 49 is pushed up by the lower diaphragm 48. It sits on the valve seat 59 and closes the outflow hole 58 (spout 36). As a result, the ejection of sewage from the nozzle 35 is stopped, and the sewage is pumped to the fixed discharge pipe 6 through the pump discharge pipe portion 25 (pump discharge port 26) and the attachment / detachment connection pipe 22.

Then, with the ball valve 49 pressed against the valve seat 59, the pressure inside the valve accommodating portion 51 becomes positive, and the upper diaphragm 53, the lower diaphragm 48, and the oil return to the state before the pump was started.

On the other hand, when the operation of the submersible pump device 2 is stopped, the ball valve 49 is separated from the valve seat 59 and falls on the lower diaphragm 48. The time from the start of operation until the ball valve 49 closes the outflow hole 58 can be adjusted by the adjusting valve 56.

By operating the stirring device 4 in this way, the sand, sludge, suspended oil, scum, etc. in the pump tank 1 are agitated by the jet stream, sucked into the submersible pump main body 3, and then discharged from the fixed discharge pipe 6. Therefore, it is possible to prevent sand and sludge from accumulating and accumulating in the water tank, and floating oil and fat and scum from adhering to the tank wall and the like.

Further, when the sewage in the pump tank 1 is agitated, the sewage near the water surface is also agitated, so that oxygen from the atmosphere is positively supplied and aeration is promoted.

Further, the submersible pump device 2 of the present embodiment is equipped with a foreign matter regulating member 70 that regulates the entry of foreign matter into the stirring device 4. Hereinafter, the configuration of the foreign matter control member 70 will be described in detail with reference to the drawings.

<Foreign matter control members>
As shown in FIGS. 5 to 7, the foreign matter restricting member 70 has a spacer portion 71 and a restricting portion 75 detachably attached to the spacer portion 71. The spacer portion 71 is sandwiched between the mounting seat 28a formed by the outer surface of the branch pipe portion 28 integrally provided in the pump casing 3a and the flange 32a of the stirring device 4. The spacer portion 71 is fastened together with an embedded bolt 65 for fixing the stirring device 4 to the pump casing 3a.

As shown in FIGS. 6 and 7, the spacer portion 71 is a flat plate having a substantially square shape and a predetermined thickness, and bolt holes 71a through which the embedding bolts 65 pass are formed at the four corners thereof.

Further, at the central position of the spacer portion 71, a communication hole 72 that is continuous with the branch hole 29 and communicates with the jet passage 57 of the stirring device 4 is formed through.

A bulging portion 73, a part of which bulges toward the center, is provided on the inner peripheral edge portion of the communication hole 72 in the spacer portion 71. A rectangular fitting hole 74 is formed at the center position of the spacer portion 71 in the height direction. A part of the fitting hole 74 extends to the bulging portion 73.

The regulating portion 75 is composed of a rod-shaped member having a quadrangular cross section. The regulating portion 75 is a fitting portion 76 that is fitted into the fitting hole 74, and an extension portion that extends from one end of the fitting portion 76 (the end of the spacer portion 71 near the communication hole 72) in the thickness direction of the spacer portion 71. It has 77 and a bent portion 78 bent from the tip of the stretched portion 77 along the main flow direction of the discharge flow.

The regulating portion 75 is detachably attached to the spacer portion 71 by fitting the fitting portion 76 into the fitting hole 74 of the spacer portion 71 (see FIG. 7). The regulation unit 75 is arranged so as to close a part of the branch hole 29.

Further, the fitting portion 76 of the regulating portion 75 is sandwiched between the mounting seat 28a of the pump casing 3a and the flange 32a of the stirring device 4 in a state of being fitted in the fitting hole 74 of the spacer portion 71. ing. That is, the fitting portion 76 of the regulating portion 75 is jointly tightened by the embedding bolt 65, similarly to the spacer portion 71.

The extension portion 77 of the regulation portion 75 extends from the wall surface in the branch hole 29 corresponding to the upstream side in the mainstream direction shown by the arrow in FIG. 5 so as to protrude into the pump casing 3a. The bent portion 78 is located in the pump casing 3a by extending from the tip of the extending portion 77 along the mainstream direction.

Here, the mainstream direction corresponds to the direction in which the discharge flow discharged due to the rotation of the impeller (not shown) flows along the inner wall partitioning the inside of the pump chamber 27 of the pump casing 3a, and is roughly shown in FIG. It is in the clockwise direction. Then, in the present embodiment, the pump casing 3a constitutes a headrace that guides the discharge flow so as to flow in the mainstream direction.

In the submersible pump device 2 configured in this way, the discharge flow discharged from the impeller and flowing in the pump casing 3a at the start of operation of the submersible pump main body 3 and during a predetermined period in which the stirring device 4 operates. At least a part of the above flows into the stirring device 4 in the branching direction, that is, through the branch hole 29 that opens on the inner peripheral surface of the pump casing 3a.

At this time, even if, for example, a solid foreign matter or a lumpy fibrous foreign matter tries to enter the branch hole 29 together with the discharge flow, such foreign matter interferes with the regulating portion 75 of the foreign matter regulating member 70. As a result, it is possible to restrict foreign matter from entering the stirring device 4 through the branch hole 29 and prevent the stirring device 4 from being clogged with the foreign matter.

Then, even if it becomes necessary to replace the foreign matter regulating member 70 due to the specification change of the submersible pump main body 3, only the regulating portion 75 is removed from the spacer portion 71 and replaced with another regulating portion 75 having a different dimension or shape. It is possible to respond just by doing.

Further, the rod-shaped regulating portion 75 is supported in a cantilevered state on the wall surface on the upstream side in the mainstream direction in the branch hole 29 at its base end, and its tip is in a floating state in the pump casing 3a. (See Fig. 5).

As a result, even if a fibrous foreign matter is caught in the regulating portion 75, the foreign matter can escape from the tip of the regulating portion 75, so that the foreign matter is less likely to be deposited on the regulating portion 75, and the branch hole is formed. It is possible to suppress the blockage of 29.

Further, the foreign matter regulating member 70 can be arranged so as to close a part of the branch hole 29 by sandwiching the spacer portion 71 between the submersible pump main body 3 and the stirring device 4. There is an advantage that it can be retrofitted to the submersible pump main body 3 or the submersible pump device 2 with the existing stirring device 4 in the pump tank 1.

<< Embodiment 2 >>
Hereinafter, the same parts as those in the first embodiment are designated by the same reference numerals, and only the differences will be described.

As shown in FIGS. 8 to 10, the foreign matter restricting member 80 has a spacer portion 81 and a restricting portion 85 detachably attached to the spacer portion 81. The spacer portion 81 is sandwiched between the mounting seat 28a of the pump casing 3a and the flange 32a of the stirring device 4. The spacer portion 81 is fastened together with the embedding bolt 65.

As shown in FIGS. 9 and 10, the spacer portion 81 is a flat plate having a substantially square shape and a predetermined thickness, and bolt holes 81a through which the embedding bolts 65 pass are formed at the four corners thereof.

Further, at the central position of the spacer portion 81, a communication hole 82 that is continuous with the branch hole 29 and communicates with the jet passage 57 of the stirring device 4 is formed through.

A notch groove 83 is formed in the inner peripheral edge of the communication hole 82 in the spacer portion 81, which is partially cut out. The notch grooves 83 are formed at two locations on both sides in the width direction at the center position in the height direction of the spacer portion 81.

The regulation portion 85 has a plate-shaped regulation plate 86 and protrusions 87 protruding from the corners of the regulation plate 86 on both sides in the width direction. The regulation plate 86 is formed with a through hole 86a that penetrates in the thickness direction.

The regulation portion 85 is detachably attached to the spacer portion 81 by fitting the protrusion 87 into the notch groove 83 of the spacer portion 71 (see FIG. 10).

Further, the protrusion 87 of the regulation portion 85 is sandwiched between the mounting seat 28a of the pump casing 3a and the flange 32a of the stirring device 4 in a state of being fitted into the notch groove 83 of the spacer portion 81. .. That is, the protrusion 87 of the regulation portion 85 is jointly tightened by the embedding bolt 65 as in the spacer portion 81.

The regulation plate 86 extends so as to project into the pump casing 3a. The regulation plate 86 is arranged along the mainstream direction indicated by the arrow in FIG. 8 so as to cross the branch hole 29.

By arranging the regulation plate 86 so as to cross the branch hole 29 in this way, the entry of foreign matter can be effectively suppressed. Further, by forming the through hole 86a in the regulation plate 86, foreign matter floating above the regulation plate 86 will fall through the through hole 86a of the regulation plate 86 when the operation of the pump is stopped, which is regulated. Foreign matter is less likely to accumulate on the regulation plate 86 of the portion 75, and blockage of the branch hole 29 can be suppressed.

In the present embodiment, one regulating portion 85 is attached to the spacer portion 81. For example, a plurality of notch grooves 83 of the spacer portion 81 are formed at intervals in the vertical direction. The regulation portion 85 of the above may be attached.

<< Other Embodiments >>
The embodiment may have the following configuration.

In the present embodiment, the stirring device 4 is arranged in the vicinity of the pump discharge pipe portion 25 in the pump casing 3a, but the present invention is not limited to this embodiment, and the stirring device 4 can be attached at an appropriate position.

Further, in the present embodiment, in the configuration in which the stirring device 4 is attached to the pump casing 3a, the foreign matter restricting member 70 is provided, but the stirring device 4 has a detachable connection pipe 22 in addition to the pump casing 3a. It may be attached to. In that case, since the attachment / detachment connection pipe 22 is provided with the branch hole and the mounting seat, the illustration is omitted, but for example, by interposing the spacer portion 71 between the mounting seat and the stirring device, the spacer portion 71 can be formed. The detachably attached restricting portion 75 can be arranged so as to close a part of the opening of the branch hole.

Further, even when the spacer portion and the regulation portion are divided into a split structure, even if a plurality of specifications are supported, the number of spacer portions can be reduced by preparing a plurality of types of regulation portions. As described above, by forming both the spacer portion and the regulation portion into a flat plate shape or a shape cut out from the flat plate, the storage space can be effectively saved.

As described above, the present invention is extremely useful and industrially effective because it has a highly practical effect that only parts that need to be replaced can be easily replaced in response to a change in the specifications of the submersible pump. Is highly available.

1 Pump tank (water tank)
2 Submersible pump device
3 Submersible pump body (submersible pump)
3a Pump casing (headrace)
4 Stirrer 29 Branch hole 70 Foreign matter control member 71 Spacer part 75 Control part 80 Foreign matter control member 81 Spacer part 85 Regulatory part

Claims (5)

A submersible pump device including a submersible pump installed in a water tank and a stirring device that injects at least a part of the discharge flow discharged from the submersible pump into the water tank to stir the inside of the water tank. ,
The submersible pump is provided with a headrace that guides the discharge flow in a predetermined mainstream direction.
A branch hole for branching at least a part of the discharge flow from the submersible pump side to the agitator side is opened on the wall surface of the headrace.
The stirring device is attached to the opening position of the branch hole on the wall surface of the headrace.
A foreign matter regulating member for restricting foreign matter from entering the stirring device through the branch hole is provided.
The foreign matter restricting member is arranged so as to be detachably attached to the spacer portion sandwiched between the headrace and the stirring device and to close a part of the branch hole. have a and the restricting portion,
A fitting hole that opens in the thickness direction is formed in the spacer portion.
The submersible pump device is characterized in that the regulating portion has a fitting portion that is sandwiched between the headrace and the stirring device in a state of being fitted in the fitting hole. A submersible pump device including a submersible pump installed in a water tank and a stirring device for agitating the inside of the water tank by injecting at least a part of the discharge flow discharged from the submersible pump into the water tank. ,
The submersible pump is provided with a headrace that guides the discharge flow in a predetermined mainstream direction.
A branch hole for branching at least a part of the discharge flow from the submersible pump side to the agitator side is opened on the wall surface of the headrace.
The stirring device is attached to the opening position of the branch hole on the wall surface of the headrace.
A foreign matter regulating member for restricting foreign matter from entering the stirring device through the branch hole is provided.
The foreign matter restricting member is arranged so as to be detachably attached to the spacer portion sandwiched between the headrace and the stirring device and to close a part of the branch hole. Has a regulatory department
The spacer portion is formed with a communication hole that communicates with the branch hole and opens in the thickness direction, and a notch groove in which a part of the inner peripheral edge portion of the communication hole is cut out.
The submersible pump device is characterized in that the regulating portion has a protrusion that is sandwiched between the headrace and the stirring device in a state of being fitted in the notch groove. In claim 1 or 2 ,
The submersible pump device is characterized in that the regulating portion is supported by the spacer portion in a cantilevered state and is composed of a rod-shaped member extending from the upstream side to the downstream side in the mainstream direction. In claim 1 or 2 ,
The submersible pump device is characterized in that the regulating portion is composed of a plate-shaped member arranged along the mainstream direction so as to cross the branch hole. In any one of claims 1 to 4 ,
The submersible pump device, wherein the regulation unit projects inside the headrace.

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