JP6130177B2 - In-tank stirring device - Google Patents

Description

  The technique disclosed here relates to an in-tank agitation apparatus that performs agitation in a water tank.

  Patent Documents 1 to 4 describe aeration devices used for water purification. The aeration apparatus described in these documents is configured to eject the sucked air into the water together with the water discharged by the pump device using the ejector effect. Such an aeration apparatus suppresses deterioration of the water quality of a pond, for example by being installed in reservoirs, such as a fire-fighting pond.

  In addition, in a relay pump tank in a sewage system, a part of the water discharged from the drainage pump device is jetted into the water tank, so that sand or sludge stays or accumulates in the water tank, or floating oil or scum It is known to arrange an agitating device that suppresses sticking to a tank wall or the like (see, for example, Patent Documents 5 and 6). Such a stirring device is attached and fixed to the casing of the pump device, or is attached and fixed to a detachable connecting pipe for detachably connecting the pump device to a fixed discharge pipe fixed in the water tank. To do.

Japanese Patent Laid-Open No. 5-277383 JP-A-8-192182 JP-A-11-197688 JP 2002-1386 A Japanese Patent No. 4919389 Japanese Patent No. 3570861

  By the way, as described above, the stirring device installed in the relay pump tank or the like is attached and fixed to the casing of the pump device or attached and fixed to the connecting pipe for detachment. It is difficult to install.

  In addition, since the stirring device is attached and fixed to the pump device and the connecting / disconnecting connecting pipe, when maintenance of the stirring device becomes necessary, for example, each pump device must be lifted from the water tank, which is inferior in maintainability. There is also an inconvenience.

  The technology disclosed herein has been made in view of the above points, and the purpose of the technology is to easily install an agitation device in a tank that agitates the inside of a water tank in which a pump device for drainage is installed. And it is in the structure which can be pulled up easily.

  The technique disclosed here relates to an in-tank agitation apparatus that performs stirring in the water tank by ejecting water into the water tank. A discharge pipe is fixedly installed in the water tank, and a pump device is connected to one end of the discharge pipe, and water discharged by the pump device is discharged out of the water tank through the discharge pipe. Is done. The tank agitator is connected in the middle of the discharge pipe, and is configured such that a part of the water flowing in the discharge pipe branches and flows, and one end thereof opens into the air. And the intake pipe section, the branch pipe section and the intake pipe section are connected to each other, and air sucked through the intake pipe section by an ejector effect is mixed into water supplied from the branch pipe section, and the water tank An ejector configured to be ejected into the interior.

  The ejector section is configured to be movable up and down between the state installed in the water tank and the state lifted from the water tank together with the intake pipe section, and the branch pipe section is flexible. And is configured to bend as the intake pipe portion and the ejector portion are raised and lowered.

  According to this configuration, the tank agitation device is installed in the water tank in which the discharge pipe and the pump device are installed, and a part of the water discharged by the pump device is spouted into the water tank, thereby stirring the water tank. To do.

  Specifically, the tank agitator includes a branch pipe part connected in the middle of the discharge pipe, an intake pipe whose one end opens to the air, and an ejector part to which the branch pipe part and the intake pipe are connected. Have. When the pump device is activated and water is flowing through the discharge pipe, a part of the water is supplied to the ejector section through the branch pipe section. The ejector section sucks air through the intake pipe and mixes the sucked air into water by an ejector effect using the flow of water supplied from the branch pipe section. Then, the ejector unit ejects water mixed with air into the water tank. Thereby, the inside of a water tank is stirred. This agitator in the tank can provide not only the agitation effect due to the jet flow into the water tank but also the supply of air into the water tank, so that an aeration effect is also obtained.

  In the tank stirring apparatus having the above-described configuration, the branch pipe portion is connected in the middle of the discharge pipe, and is not fixedly attached to the pump device. Therefore, it can be relatively easily installed on the existing pump equipment. Further, since the in-tank stirring device and the pump device are independent of each other, it is not necessary to lift the pump device together when the in-tank stirring device is lifted. This enhances the maintainability of the tank stirring device.

  And in this stirring apparatus, the branch pipe part connected to the discharge pipe fixedly installed in the water tank has flexibility. When raising and lowering the agitator in the tank, more precisely, when raising and lowering the intake pipe part and the ejector part, the branch pipe part bends so that the branch pipe part remains connected to the discharge pipe and the intake pipe. And the ejector can be easily lifted from the water tank. In the tank agitation device, for example, there is a high possibility that maintenance of the ejector portion that is likely to be clogged or the like is required, but since the ejector portion can be easily lifted, the maintainability is improved.

Here, in the tank stirring apparatus having the above-described configuration, the branch pipe portion is only connected to the discharge pipe, and the intake pipe portion and the ejector portion are independent of the pump equipment in the water tank. Therefore, intracisternal stirrer, in a state independent of the pump equipment, Ru can der be installed in the water tank.

On the other hand , the pump device is guided by a guide portion installed in the water tank so that it can be moved up and down between the state installed in the water tank and the state pulled up from the water tank. The intake pipe portion extends in the vertical direction along the guide portion in the water tank and engages with the guide portion so as to move up and down along the guide portion. and which, the intake pipe portion and said ejector portion, and the pump device that is vertically movable independently configured.

  By carrying out like this, in order to raise / lower a pump apparatus, the stirring apparatus in a tank can be installed in a water tank using the guide part previously installed in the water tank. This makes it possible to install the agitation device in the tank at a predetermined position, so that the ejection direction from the ejector portion can be regulated in an appropriate direction in the water tank. This enhances the agitation effect in the water tank and avoids a situation in which a jet mixed with air directly hits the equipment in the water tank and has an adverse effect.

  Moreover, in the said structure, it becomes possible to raise / lower the stirring apparatus in a tank using a guide part, and only the stirring apparatus in a tank is pulled up from the inside of a water tank, or it drops and installs in a water tank. Can be easily done.

  In the middle of the discharge pipe, a check valve for preventing a back flow to the pump device side is interposed, and the check valve is located at a position lower than a valve body disposed therein. The air vent hole communicating with the exhaust pipe may be opened, and the branch pipe portion may be connected to the air vent hole of the check valve.

  By doing so, it is possible to communicate the branch pipe portion of the in-tank agitation apparatus with the discharge pipe using the air vent hole provided in advance in the check valve. By this, it becomes much easier to install the agitation device in the tank retrofit to the existing pump equipment installed in the water tank.

  As described above, according to the above-described stirring apparatus in the tank, by connecting the branch pipe portion of the stirring apparatus in the tank in the middle of the discharge pipe, it becomes an independent state with respect to the pump apparatus, It is easy to install on the pump equipment as a retrofit, and the branch pipe part is configured to bend when the intake pipe part and ejector part of the agitator in the tank are raised and lowered, so the intake pipe part and ejector part are In a state independent of the pump device, it can be easily lifted from the water tank, and the maintainability can be improved.

It is sectional drawing which shows the whole structure of the sewage pump installation in which the stirring apparatus in a tank was installed. It is a general view which shows the tank stirring device. It is (a) AA sectional view and (b) side view showing composition of a check valve. It is a front view which shows the engagement state of the engaging part of the stirring apparatus in a tank, and the raising / lowering guide pipe of a submersible pump.

  Hereinafter, an embodiment of a tank stirring device will be described based on the drawings. In addition, the following description of preferable embodiment is an illustration. FIG. 1 shows a sewage relay pump tank 1 (hereinafter also simply referred to as a pump tank 1) as an example of a water tank in which a tank stirring device 8 according to the embodiment is installed. The pump tank 1 has an inflow port 5 and a manhole 11, and a submersible pump 3 as a pump device is installed therein. The submersible pump 3 is driven until the water level drops to a predetermined stop level when the water level of the sewage flowing into the pump tank 1 from the inlet 5 becomes equal to or higher than a predetermined operation level, 6 through the pump tank 1. In order to control the operation of the submersible pump 3, an operation float switch 71, a stop float switch 72 and an abnormal water level alarm float switch 73 are provided in the pump tank 1, and above the pump tank 1. A control panel 10 is provided.

  The submersible pump 3 is lowered from the manhole 11 of the pump tank 1 to the bottom of the tank through the guide pipe 12 and is not shown in detail, but is detachably installed in the pump tank 1 by an attaching / detaching device. When the submersible pump 3 is not raised or lowered, the raising and lowering chain 15 is hooked on, for example, the lid 14 of the manhole 11 so as not to fall into the tank. The attachment / detachment device couples the submersible pump 3 to a fixed discharge pipe 6 fixed in the pump tank 1, and the submersible pump 3 is connected to the fixed discharge pipe 6 by this connection.

  As shown in FIGS. 1 and 4, the guide pipes 12 are arranged extending in the vertical direction in the pump tank 1, and two guide pipes 12 are arranged side by side. When the guide provided in the submersible pump 3 is engaged with each guide pipe 12, the submersible pump 3 moves up and down in the pump tank 1 while being guided by the guide pipe 12. The lower end portion of each guide pipe 12 is fixed to a connection 60 fixed to the bottom of the pump tank 1, while the upper end portion is supported by a guide holder 2 fixed to the manhole 11.

  The fixed discharge pipe 6 has a lower end connected to a connection 60 fixed to the bottom of the pump tank 1 and extends vertically upward in the pump tank 1 and is bent in the horizontal direction at the upper end. After that, it extends through the side wall of the pump tank 1 to the outside of the pump tank 1. In the middle of the fixed discharge pipe 6, a check valve 61 for preventing a back flow while the submersible pump 3 is stopped is interposed.

  As illustrated in FIG. 3, the check valve 61 includes a main passage 611 communicating with the fixed discharge pipe 6, a valve seat 612 provided on the main passage 611, and a spherical valve body that can be seated on the valve seat 612. 613 and a retracting portion 614 in which the valve body 613 can be retracted from the main passage 611. When the water flows from the submersible pump 3 toward the outside of the pump tank 1, as shown by an alternate long and short dash line in FIG. While being allowed to pass by water by being lifted by the flow of water and retracting to the retracting portion 614, water is directed from the outside of the pump tank 1 toward the submersible pump 3, as indicated by solid arrows in FIG. When attempting to flow, the valve body 613 is seated on the valve seat 612 as shown by the solid line in FIG.

  An air vent hole 615 is formed through the check valve 61 at a position below the valve seat 612. When the water level in the pump tank 1 rises while the submersible pump 3 is stopped, the hole 615 removes the air accumulated between the check valve 61 and the impeller of the submersible pump 3, 3 is a hole for priming water. By doing so, pumping can be performed at the next startup of the submersible pump 3.

  The pump facility having such a configuration is a conventional configuration, while the pump tank 1 is provided with the tank agitation device 8 as described above. As shown in FIGS. 1 and 2, the in-tank agitation device 8 includes a branch pipe portion 81 connected in the middle of the fixed discharge pipe 6, an intake pipe portion 82 having one end opened to the air, and a branch pipe portion. 81 and an intake pipe portion 82, and an ejector portion 83 to which each is connected.

  As is clear from FIG. 2, the branch pipe portion 81 is constituted by a flexible hose, and one end thereof is connected to the air vent hole 615 of the check valve 61 as shown in FIG. The other end is connected to the ejector portion 83 as shown in FIG. As will be described later, the branch pipe portion 81 is set to a sufficiently long length so that the intake pipe portion 82 and the ejector portion 83 can freely move up and down while being connected to the check valve 61. Has been. Further, one end of the chain 811 is fixed at an intermediate position of the branch pipe portion 81, and the other end of the chain 811 is fixed to the upper end portion of the intake pipe portion 82. As a result, the flexible and long branch pipe portion 81 can be positioned at a predetermined position in the pump tank 1, and the tank agitating device 8 is moved up and down as will be described later. In this case, it is possible to prevent the branch pipe portion 81 from being caught on the way, and to smoothly raise and lower the tank agitator 8.

  The intake pipe portion 82 is a tubular member that extends in the vertical direction along the guide pipe 12 installed in the pump tank 1, and the upper end portion thereof is a lid as shown in FIG. It is open upward in the vicinity of 14. As a result, the intake pipe portion 82 opens into the air above the water surface. On the other hand, the lower end portion of the intake pipe portion 82 is bent to a predetermined angle and then connected to the ejector portion 83. Thereby, as will be described later, the axis of the ejection port 831 of the ejector portion 83 is inclined downward. In addition, two engaging portions 821 that engage with the guide pipe 12 are attached to the midway position of the intake pipe portion 82 with a predetermined interval in the vertical direction. Each engaging portion 821 is disposed on the opposite side of the intake pipe portion 82 with the guide pipe 12 interposed therebetween, and has a diameter larger than the interval between the two guide pipes 12 as illustrated in FIG. It is configured in a disk shape. Each engaging portion 821 is connected to the intake pipe portion 82 by a connecting portion 822 that passes between the two guide pipes 12. When the engaging portion 821 is engaged with the guide pipe 12, the intake pipe portion 82 is disposed along the guide pipe 12 and can be moved up and down along the guide pipe 12. Further, the engaging portion 821 can be disengaged from the upper end of the guide pipe 12. One end of a suspension chain 823 is fixed to the upper end portion of the intake pipe portion 82, and this suspension chain 823 is hooked on the lid 14 like the raising / lowering chain 15 of the submersible pump 3 ( (See FIG. 1). As a result, the intake pipe portion 82 and thus the entire tank agitating device 8 are suspended and arranged in the pump tank 1 so as to be in a predetermined height position while being engaged with the guide pipe 12. Will be.

  As shown in FIG. 2, the ejector portion 83 includes a first connection portion 832 to which the branch pipe portion 81 is connected, a second connection portion 833 to which the intake pipe portion 82 is connected, and an ejection in which an outlet 831 is formed. Part 834. Among these, the 1st connection part 832 is arrange | positioned so that it may become coaxial with the axis | shaft of the jet nozzle 831 of the ejection part 834, while the 2nd connection part 833 is in the direction orthogonal to the axis | shaft of the jet nozzle 831. Is arranged.

  A nozzle 835 is disposed on the downstream side of the first connection portion 832, and the nozzle 835 increases the flow rate of water flowing into the ejector portion 83 through the first connection portion 832 and reduces the static pressure thereof. I am doing so. The ejector portion 83 sucks air from the upper end opening of the intake pipe portion 82 (that is, ejector effect) due to the decrease in the static pressure, mixes the sucked air into water, and enters the pump tank 1 through the spout 831. Erupts. As shown in FIGS. 1 and 2, the ejecting portion 834 of the ejector portion 83 is disposed so that the shaft of the ejection port 831 is inclined downward in the vicinity of the bottom of the pump tank 1.

  Next, the operation of this tank internal stirring device 8 will be described. The submersible pump 3 is activated, and the water discharged therefrom is discharged out of the pump tank 1 through the connection 60 and the fixed discharge pipe 6. A part of the water flowing in the fixed discharge pipe 6 flows into the branch pipe part 81 of the in-tank agitation device 8 through the air vent hole 615 of the check valve 61 and passes through the branch pipe part 81 to the ejector part 83. Inflow. As described above, in the ejector portion 83, air is sucked through the intake pipe portion 82 due to the ejector effect, and a mixed fluid of water and air is jetted into the pump tank 1 through the jet port 831 of the jet portion 834. The Thus, while the submersible pump 3 is in operation, sand, sludge, floating oil, scum, etc. in the pump tank 1 are agitated by the jet flow from the tank agitator 8, and together with the water in the pump tank 1, After being sucked into the pump 3, it is discharged from the fixed discharge pipe 6. For this reason, it is suppressed that sand and sludge accumulate and accumulate in the pump tank 1, and that floating oil and fat and scum adhere to a tank wall etc. Moreover, in this tank stirring apparatus 8, not only water is spouted but the aeration in the pump tank 1 can be accelerated | stimulated by the water spouted out.

  The in-tank agitation device 8 having such a configuration can be easily installed later on the existing pump equipment because the branch pipe portion 81 is merely connected to the check valve 61. Moreover, since the branch pipe part 81 is connected to the air vent hole 615 of the check valve 61, there is an advantage that the connection between the branch pipe part 81 and the fixed discharge pipe 6 becomes easier.

  Further, since the tank agitator 8 is connected to the fixed discharge pipe 6, it is independent of the submersible pump 3, and this tank agitator 8 can be lifted from the pump tank 1 alone. Become. In other words, when the tank agitator 8 is lifted from the pump tank 1, if the suspension chain 823 connected to the intake pipe portion 82 is lifted, the intake pipe portion 82 is guided and guided by the guide pipe 12. The intake pipe portion 82 and the ejector portion 83 can be lifted from the pump tank 1. At this time, the branch pipe portion 81 connected to the fixed discharge pipe 6 is constituted by a flexible hose, so that the branch pipe portion 81 is connected to the fixed discharge pipe 6 when the tank stirring device 8 is lifted. The intake pipe part 82 and the ejector part 83 are pulled up by bending the branch pipe part 81 while being connected to the pipe. In this way, the tank stirring device 8 can be easily lifted from the pump tank 1. Conversely, when the tank agitator 8 is installed in the pump tank 1, the intake pipe 82 is lowered along the guide pipe 12 while the intake pipe 82 is engaged with the guide pipe 12. By attaching the hanging chain 823 to the lid 14, the tank stirring device 8 can be easily installed in the pump tank 1. In this way, only the in-tank agitation device 8 can be lifted and lowered easily, and as a result, the maintainability of the in-tank agitation device 8 is enhanced.

  The intake pipe portion 82 and the ejector portion 83 of the in-tank agitation device 8 can be constituted by, for example, a vinyl chloride pipe. By carrying out like this, the tank stirring apparatus 8 can be reduced in weight, and the tank stirring apparatus 8 can be moved up and down more easily.

  Further, since the tank agitation device 8 is installed in a state of being engaged with the guide pipe 12, the jet port 831 can be positioned at a predetermined position in the pump tank 1. Moreover, it becomes possible to change easily the installation height of the stirring apparatus 8 in a tank by changing the location where the hanging chain 823 is attached to the lid | cover 14. FIG. This makes it possible to appropriately arrange the spout 831 in the pump tank 1 to enhance the stirring effect in the pump tank 1, and the jet flow mixed with air directly hits the equipment in the pump tank 1. Thus, it is possible to avoid a situation that has an adverse effect.

  The tank agitation device is not limited to a configuration that engages with the guide pipe 12, but engages with other equipment in the pump tank 1 (for example, a step provided in the pump tank or a baffle plate). A configuration may be adopted.

  In the above-described configuration, the tank agitating device 8 is installed in the pump tank 1 in a suspended state by using the hanging chain 823. For example, the ejector section 83 is connected to the bottom of the pump tank 1. A configuration may be adopted in which a leg abutting is provided and the agitation device 8 in the tank is installed at the bottom of the pump tank 1.

  Further, in the above configuration, the branch pipe portion 81 is connected to the air vent hole 615 of the check valve 61. However, the branch pipe portion 81 may be connected to the fixed discharge pipe 6 by other configurations. Good. This is effective particularly when the air vent hole 615 of the check valve 61 is separately used and the air vent hole cannot be used for the agitation device in the tank.

  In addition, the in-tank agitation device disclosed herein can be widely applied to various water tanks in which a pump device for drainage is installed, in addition to being installed in a sewage relay pump tank.

1 Pump tank (water tank)
12 Guide pipe (guide part)
3 Submersible pump (pump device)
6 fixed discharge pipe (discharge pipe)
61 Check valve 615 Air vent hole 8 Stirrer in tank 81 Branch pipe part 82 Intake pipe part 83 Ejector part

Claims (2)

A tank agitation device for agitating the water tank by jetting water into the water tank,
A discharge pipe is fixedly installed in the water tank, and a pump device is connected to one end of the discharge pipe, and water discharged by the pump device is discharged out of the water tank through the discharge pipe. And
A branch pipe connected to the middle of the discharge pipe and configured to branch and flow part of the water flowing in the discharge pipe;
An intake pipe portion whose one end is configured to open into the air;
The branch pipe part and the intake pipe part are connected to each other, and the air sucked through the intake pipe part due to an ejector effect is mixed with water supplied from the branch pipe part and jetted into the water tank. An ejector portion, and
The ejector part is configured to be movable up and down between the state installed in the water tank and the state lifted from the water tank, together with the intake pipe part,
The branch pipe portion has flexibility, and is configured to bend as the intake pipe portion and the ejector portion are raised and lowered .
The pump device is arranged so that it can be moved up and down between a state installed in the water tank and a state lifted from the water tank by being guided by a guide part installed in the water tank,
The intake pipe portion is disposed extending in the vertical direction along the guide portion in the water tank, and is engaged with the guide portion so as to move up and down along the guide portion,
The tank agitation device in which the intake pipe portion and the ejector portion are configured to be movable up and down independently of the pump device. In the tank stirring apparatus according to claim 1,
A check valve is provided in the middle of the discharge pipe to prevent backflow to the pump device side,
In the check valve, an air vent hole communicating with the discharge pipe is opened at a position lower than the valve body disposed therein,
The said branch pipe part is the stirring apparatus in a tank connected to the hole for the air vent of the said non-return valve.

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