JP7418929B2 - pump - Google Patents

Description

TECHNICAL FIELD The present invention relates to a vertical shaft pump for emergency drainage, a pump for temporary construction work drainage, a pump for agricultural water supply and drainage, and the like.

BACKGROUND ART Vertical shaft pumps for emergency drainage in the event of water disasters such as heavy rains or typhoons caused by abnormal weather, pumps for drainage from temporary civil engineering works, or pumps for agricultural water supply and drainage are known to have a built-in dry type submersible motor. Pumps using submersible motors require maintenance such as lifting the submersible motor and storing it in a warehouse or the like during non-water periods such as winter.
For example, Patent Document 1 describes a pump device in which a submersible motor pump is disposed within a column pipe.

Japanese Patent Application Publication No. 2013-217299

In the above conventional techniques, the following problems remain.
Pumps using dry type submersible motors are large motors with an internal air layer and are electrical equipment, so they have complex structures such as watertight structures, and if installed underwater year-round, they will not rust. There was a tendency for the lifespan to be shortened due to progression of dielectric breakdown and the like. Therefore, as mentioned above, the complicated maintenance and management of lifting the submersible motor from the pump and storing it during the non-water period is necessary, resulting in high costs.
In addition, in conventional equipment, the power source for driving the submersible motor pump was supplied with power from the diesel engine for the generator via a high-voltage switchboard with a built-in reduced voltage starting device (reactor condolfer). Building equipment was also required to house the high-voltage switchboard and diesel engine for the generator.

The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a pump that can simplify management and equipment without using a submersible motor.

The present invention employs the following configuration to solve the above problems. That is, the pump according to the first invention includes a rotating shaft to which an impeller is attached and rotationally driven, a water pressure motor that rotationally drives the rotating shaft, rotatably supporting the impeller therein, and sucking up raw water. a casing having a water suction port at an end; a circulating water channel for sending circulating water to the hydraulic motor; and a circulating water channel installed outside the casing to send the pressurized circulating water to the hydraulic motor through the circulating water channel. It is characterized by comprising a circulating water supply section and a circulating water cooling mechanism that cools the circulating water in the circulating water flow path.

This pump is equipped with a circulating water supply section that is installed outside the casing and sends pressurized circulating water to the hydraulic motor through a circulating water flow path, and a circulating water cooling mechanism that cools the circulating water in the circulating water flow path. Therefore, the impeller can be driven by a hydraulic motor with simple management and equipment rather than an electric device, and the circulating water can be cooled by the circulating water cooling mechanism to suppress overheating of the hydraulic motor.

In the pump according to a second invention, in the first invention, the circulating water flow path includes a high-pressure water pipe that sends the pressurized circulating water from the circulating water supply section to the water pressure motor, and a high-pressure water pipe that sends the pressurized circulating water from the water pressure motor to the circulating water. and a low-pressure water pipe that returns the circulating water to the supply section, and the circulating water cooling mechanism is arranged such that at least a portion of the high-pressure water pipe and the low-pressure water pipe can come into contact with the raw water before or during the sucking up from the water intake port. It is characterized by having a cooling piping section.
That is, in this pump, the circulating water cooling mechanism has a cooling piping section in which at least a portion of the high-pressure water pipe and the low-pressure water pipe is arranged so that it can come into contact with the raw water before or during suction from the water intake port. The cooling piping portions of the high-pressure water pipes and low-pressure water pipes come into contact with the raw water, allowing efficient heat dissipation of the circulating water.

The pump according to a third invention is characterized in that, in the second invention, the cooling piping section includes a part in which at least a part of the high-pressure water pipe and the low-pressure water pipe are arranged inside the casing. .
In other words, in this pump, the cooling piping section includes a portion in which at least a portion of the high-pressure water pipe and the low-pressure water pipe are arranged inside the casing, so that the cooling piping section comes into contact with the raw water flowing inside the casing, thereby providing lubrication. Water can be cooled.

In the pump according to a fourth aspect of the invention, in the second or third aspect, the water intake port of the casing is arranged in a water intake tank in which the raw water is stored, and the cooling piping section is connected to the high-pressure water pipe and the water intake tank. It is characterized in that at least a portion of the low-pressure water pipe is provided with a portion that is brought into contact with the raw water in the water absorption tank.
That is, in this pump, the cooling piping section includes a portion in which at least a portion of the high-pressure water pipe and the low-pressure water pipe is brought into contact with the raw water in the water absorption tank. The lubricating water can be cooled by the contact between the two parts.

In the pump according to a fifth aspect of the invention, in any one of the second to fourth aspects, the cooling piping section includes cooling fins on an outer circumferential surface of at least one of the high-pressure water pipe and the low-pressure water pipe. Features.
That is, in this pump, since the cooling piping section includes cooling fins on the outer circumferential surface of at least one of the high-pressure water pipe and the low-pressure water pipe, the circulating water can be further effectively cooled by heat radiation by the cooling fins.

In the pump according to a sixth invention, in any one of the second to fifth inventions, the cooling piping section has a spiral section in which at least one of the high-pressure water pipe and the low-pressure water pipe is arranged in a spiral shape. It is characterized by the presence of
That is, in this pump, the cooling piping section has a spiral section in which at least one of the high-pressure water pipe and the low-pressure water pipe is arranged in a spiral manner, so the area of contact with the raw water is increased by the spirally arranged section. This increases heat dissipation and allows for more effective cooling of circulating water.

In the pump according to a seventh invention, in any one of the second to sixth inventions, the cooling piping section includes a part in which at least one of the high-pressure water pipe and the low-pressure water pipe branches into a plurality of branch pipes. It is characterized by the presence of
In other words, in this pump, since the cooling piping section includes a portion where at least one of the high-pressure water pipe and the low-pressure water pipe branches into a plurality of branch pipes, the contact area with raw water is reduced by the branched portion into a plurality of branch pipes. This increases heat dissipation and allows for more effective cooling of circulating water.

According to the present invention, the following effects are achieved.
That is, according to the pump of the present invention, there is a circulating water supply section that is installed outside the casing and sends pressurized circulating water to the hydraulic motor through the circulating water flow path, and a circulating water that cools the circulating water in the circulating water flow path. Since the hydraulic motor is equipped with a cooling mechanism, the impeller can be driven by the hydraulic motor, which simplifies management and equipment, and the circulating water can be cooled by the circulating water cooling mechanism to suppress overheating of the hydraulic motor.
Therefore, the pump of the present invention eliminates the need for a submersible pump, prevents short-circuit accidents due to flooding, and eliminates the need for complicated maintenance and building equipment for high-voltage switchboards, resulting in lower costs due to reduced management and equipment costs and power consumption. It becomes possible to become

1 is an overall sectional view showing a first embodiment of a pump according to the present invention. FIG. 3 is an overall sectional view showing a second embodiment of the pump according to the present invention. FIG. 3 is an overall sectional view showing a third embodiment of a pump according to the present invention. It is a sectional view of the principal part showing a 4th embodiment of the pump concerning the present invention.

EMBODIMENT OF THE INVENTION Hereinafter, 1st Embodiment of the pump in this invention is described based on FIG.

The pump 1 in this embodiment is, for example, an emergency drainage pump for a river, and as shown in FIG. A motor 4 , a casing 5 that rotatably supports the impeller 2 therein and has a water inlet 5 a at the end for sucking up the raw water W, a circulating water passage 6 that sends circulating water to the hydraulic motor 4 , and the casing 5 . It is equipped with a circulating water supply section 7 which is installed externally and sends pressurized circulating water to the hydraulic motor 4 through a circulating water flow path 6, and a circulating water cooling mechanism 8 which cools the circulating water in the circulating water flow path 6. .

The pump 1 of this embodiment is a column-type vertical shaft pump for emergency drainage in the event of a water disaster, in which a casing 5 is installed vertically with the water intake port 5a at the lower end, and a hydraulic motor 4 is disposed within the casing 5.
The circulating water flow path 6 includes a high pressure water pipe 6A that sends pressurized circulating water from the circulating water supply section 7 to the water pressure motor 4, and a low pressure water pipe 6B that returns circulating water from the water pressure motor 4 to the circulating water supply section 7. There is.

The circulating water cooling mechanism 8 has a cooling piping section 10 in which at least a portion of the high-pressure water pipe 6A and the low-pressure water pipe 6B is arranged so as to be able to come into contact with the raw water W before being sucked up or in the middle of being sucked up from the water intake port 5a.
In this embodiment, the cooling piping section 10 is disposed within the casing 5 and can come into contact with the raw water W being sucked up from the water intake port 5a.
Further, the cooling piping section 10 includes cooling fins 9 on the outer peripheral surface of at least one of the high-pressure water pipe 6A and the low-pressure water pipe 6B.

In this embodiment, one cooling fin 9 is attached to both the high-pressure water pipe 6A and the low-pressure water pipe 6B.
The cooling fins 9 have a long plate shape extending vertically along the high-pressure water pipe 6A and the low-pressure water pipe 6B, and are made of a highly corrosion-resistant metal plate such as stainless steel.
Note that in FIG. 1, the cooling fins 9 are hatched for clarity. Further, a plurality of cooling fins 9 may be attached to the high pressure water pipe 6A and the low pressure water pipe 6B.

The circulating water supply unit 7 includes a hydraulic pump 7a that sends pressurized lubricating water to a high-pressure water pipe 6A, and a diesel engine 7b that drives the hydraulic pump 7a, and these are installed in a building 7c on land.
The rotating shaft 3 is rotatably supported within the casing 5 via a bearing 3a using a bearing or the like.

The impeller 2 is made of stainless steel, for example, and is attached to the outer peripheral surface of the rotating shaft 3. The impeller 2 has a propeller shape that can push out raw water W such as river water from below to above when it rotates in the same direction as the rotational direction of the rotating shaft 3.
The high-pressure water pipe 6A and the low-pressure water pipe 6B are made of a highly corrosion-resistant metal such as stainless steel.

The casing 5 is a cylindrical column pipe having a water suction port 5a at the lower end, and a discharge pipe 5b is connected to the upper side.
The pump 1 of this embodiment is installed in a suspended manner with the upper part of the casing 5 fixed to a pump base (base plate) (not shown) attached to an installation hole formed in an installation floor (not shown) above the suction tank. ing.

As described above, in the pump 1 of the present embodiment, the circulating water supply section 7 is installed outside the casing 5 and supplies pressurized circulating water to the hydraulic motor 4 via the circulating water flow path 6, and the Since it is equipped with a circulating water cooling mechanism 8 that cools water, the impeller 2 is driven by the water pressure motor 4, which is easy to manage and install instead of electric equipment, and the circulating water is cooled by the circulating water cooling mechanism 8. Overheating of the hydraulic motor 4 can be suppressed.

Further, the circulating water cooling mechanism 8 has a cooling piping section 10 arranged so that at least a portion of the high-pressure water pipe 6A and the low-pressure water pipe 6B can come into contact with the raw water W before or in the process of being sucked up from the water intake port 5a. Therefore, the cooling piping portions 10 of the high-pressure water pipe 6A and the low-pressure water pipe 6B come into contact with the raw water W, thereby enabling efficient heat dissipation of the circulating water.

In addition, since the cooling piping section 10 includes a portion in which at least a portion of the high-pressure water pipe 6A and the low-pressure water pipe 6B are arranged inside the casing 5, the cooling piping section 10 comes into contact with the raw water W flowing inside the casing 5. This allows the lubricating water to be cooled.
In particular, the pump 1 of this embodiment is a vertical shaft pump in which the casing 5 is installed vertically with the water inlet 5a at the lower end and the hydraulic motor 4 is arranged inside the casing 5, so river water etc. are sucked from the water inlet 5a at the lower end. The water pressure motor 4 can be cooled by bringing the raw water W into contact with the high pressure water pipe 6A and the low pressure water pipe 6B to radiate heat from the circulating water.

Furthermore, since the cooling piping section 10 includes cooling fins 9 on the outer peripheral surface of at least one of the high-pressure water pipe 6A and the low-pressure water pipe 6B, the circulating water can be cooled more effectively by heat radiation by the cooling fins 9. .

Next, second to fourth embodiments of the pump according to the present invention will be described below with reference to FIGS. 2 to 4. In addition, in the following description of each embodiment, the same reference numerals are attached to the same components described in the above embodiment, and the description thereof will be omitted.

The difference between the second embodiment and the first embodiment is that the pump 1 of the first embodiment is a vertical shaft pump, whereas the pump 21 of the second embodiment has a horizontal shaft pump, as shown in FIG. The pump is a tubular pump.
That is, in the second embodiment, the water intake port 5a for the raw water W is provided at one end of the casing 25 having an axis in the horizontal direction, and the raw water W is drained from the other end. Further, a hydraulic motor 4 is installed in the casing 25 with the rotating shaft 3 arranged horizontally. Note that the rotary shaft 3 of the impeller 2 and the hydraulic motor 4 are connected via a reduction gear 24a.

Further, the second embodiment differs from the first embodiment in that the cooling piping section 20 includes a spiral section 29 in which at least a portion of the high-pressure water pipe 6A and the low-pressure water pipe 6B are disposed inside the casing 25. .
That is, the high pressure water pipe 6A and the low pressure water pipe 6B are connected to the water pressure motor 4 installed in the casing 25, and a part of the high pressure water pipe 6A and the low pressure water pipe 6B arranged in the casing 25 are arranged in a spiral shape. This is a helical portion 29 of a spiral coil.

In this way, in the pump 21 of the second embodiment, the cooling piping part 20 has the spiral part 29 in which at least one of the high-pressure water pipe 6A and the low-pressure water pipe 6B is spirally arranged. The contact area with W increases, heat dissipation improves, and circulating water can be cooled more effectively.

Next, the difference between the third embodiment and the second embodiment is that the pump 21 of the second embodiment has a water pressure motor 4 installed inside the casing 25, whereas the pump 31 of the third embodiment Now, as shown in FIG. 3, the hydraulic motor 4 is installed outside the casing 35.
That is, the pump 31 of the third embodiment is a horizontal axis mixed flow pump.
The casing 35 of the third embodiment includes a suction pipe 35a suspended with a vertical axis with the water suction port 5a at the lower end inserted into the raw water W stored in the water suction tank T1.
The casing 35 includes a casing body 35b that is connected to the upper part of the suction pipe 35a, installed above the water absorption tank T1, and rotatably houses the impeller 2.

The third embodiment is different from the second embodiment in that the cooling piping section 30 includes a portion in which at least a portion of the high-pressure water pipe 6A and the low-pressure water pipe 6B is brought into contact with the raw water W in the water absorption tank T1. It's different.
That is, in the third embodiment, the high-pressure water pipe 6A and the low-pressure water pipe 6B are arranged so as to wrap around the outer peripheral surface of the suction pipe 35a of the casing 35 to form a spiral portion 39, and the spiral portion 39 is arranged inside the water suction tank T1. The raw water W can be directly contacted.

The impeller 2 is connected to a rotating shaft 3 of a hydraulic motor 4 installed above the water absorption tank T1.
The casing main body 35b is connected to one end of the discharge pipe 35c, and the other end of the discharge pipe 35c is arranged in the discharge water tank T3.
Therefore, in the pump 31 of the third embodiment, when the impeller 2 in the casing body 35b is rotationally driven by the hydraulic motor 4, the raw water W in the water suction tank T1 is sucked up from the water suction port 5a, and the suction pipe 35a and the casing body 31a and the discharge pipe 35B into the discharge tank T3.

Note that a portion of the high-pressure water pipe 6A and the low-pressure water pipe 6B are also arranged in the water tank T2 for replenishing the water absorption tank T1, and are also in contact with the water in the water tank T2 for replenishment.
In this way, in the pump 31 of the third embodiment, the cooling piping section 30 connects at least a portion of the high-pressure water pipe 6A and the low-pressure water pipe 6B to the portion (the spiral portion 39, etc.) that is in contact with the raw water W in the water absorption tank T1. Therefore, the lubricating water can be cooled by the cooling piping section 30 coming into contact with the raw water W stored in the water absorption tank T1.

Next, the difference between the fourth embodiment and the first embodiment is that in the first embodiment, the portion where each of the high-pressure water pipe 6A and the low-pressure water pipe 6B extends into the casing 5 is a cooling pipe. On the other hand, in the pump 41 of the fourth embodiment, as shown in FIG. The point is that the tube 48a has a branched portion.

That is, the cooling piping section 40 includes a multi-steel pipe section 48 made up of a plurality of branch pipes 48a.
In addition, in the pump of this embodiment, a cooling piping section 40 including a plurality of branch pipes 48a is provided in both the high-pressure water pipe 6A and the low-pressure water pipe 6B (in FIG. (The steel pipe section 48 is shown.)
The multi-steel pipe section 48 includes a multi-steel pipe main body 48b composed of a plurality of branch pipes 48a extending vertically, a circulating water introduction chamber 48c which is a space provided in the upper part of the multi-steel pipe main body 48b, and a multi-steel pipe main body 48c. It is provided with a circulating water discharge chamber 48d which is a space provided at the lower part of 48b.

A high pressure water pipe 6A on the water pressure pump side is connected to the circulating water introduction chamber 48c, and a high pressure water pipe 6A on the water pressure motor side is connected to the circulating water discharge chamber 48d.
Further, a raw water inlet 48e is provided in the multi-steel pipe main body 48b, which allows the raw water W sucked up in the casing to flow in and around the plurality of branch pipes 48a. A raw water outlet 48f that can drain the raw water W inside the casing is provided.

Therefore, the lubricating water sent into the circulating water introduction chamber 48c by the high-pressure water pipe 6A on the water pressure pump side is divided into a plurality of branch pipes 48a and flows within the multi-steel pipe main body 48b, and also flows around the plurality of branch pipes 48a. After heat is radiated by the flowing raw water W, it is fed into the high-pressure water pipe 6A on the hydraulic motor 4 side via the circulating water discharge chamber 48d.
As described above, in the pump of the fourth embodiment, the cooling piping section 40 includes a portion (multi-steel pipe section 48) in which at least one of the high-pressure water pipe 6A and the low-pressure water pipe 6B branches into a plurality of branch pipes 48a. The area of contact with the raw water W is increased by the portion branched into a plurality of branch pipes 48a (multi-steel pipe portion 48), heat dissipation is enhanced, and circulating water can be cooled more effectively.

Note that the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention.
That is, the cooling fins of the first embodiment may be provided in the other embodiments described above, and the spiral portions of the second and third embodiments may be provided in the first embodiment and the fourth embodiment. Further, the plurality of branch pipes of the fourth embodiment may be provided in the other embodiments described above.

1, 21, 31... Pump, 2... Impeller, 3... Rotating shaft, 4... Water pressure motor, 5a... Water inlet, 5, 25, 35... Casing, 6... Circulating water flow path, 6A... High pressure water pipe, 6B... Low pressure Water pipe, 7... Circulating water supply section, 8... Circulating water cooling mechanism, 9... Cooling fin, 10, 20, 30, 40... Cooling piping section, 29, 39... Spiral section, 48a... Branch pipe, T1... Water absorption tank , W...raw water

Claims (4)

a rotating shaft to which an impeller is attached and rotationally driven;
a water pressure motor that rotationally drives the rotating shaft;
a casing that rotatably supports the impeller therein and has a water intake port at an end for sucking up raw water;
a circulating water flow path that sends circulating water to the water pressure motor;
a circulating water supply unit that is installed outside the casing and sends the pressurized circulating water to the hydraulic motor through the circulating water flow path;
a circulating water cooling mechanism that cools the circulating water in the circulating water flow path ,
a high-pressure water pipe in which the circulating water flow path sends the pressurized circulating water from the circulating water supply section to the water pressure motor;
a low-pressure water pipe that returns the circulating water from the water pressure motor to the circulating water supply section,
The circulating water cooling mechanism has a cooling piping section arranged so that at least a portion of the high pressure water pipe and the low pressure water pipe can come into contact with the raw water before or during the suction from the water intake port,
The cooling piping part has a spiral part in which at least one of the high pressure water pipe and the low pressure water pipe is arranged in a spiral shape,
A pump characterized in that the helical portion is disposed within the casing adjacent to the hydraulic motor . a rotating shaft to which an impeller is attached and rotationally driven;
a water pressure motor that rotationally drives the rotating shaft;
a casing that rotatably supports the impeller therein and has a water intake port at an end for sucking up raw water;
a circulating water flow path that sends circulating water to the water pressure motor;
a circulating water supply unit that is installed outside the casing and sends the pressurized circulating water to the hydraulic motor through the circulating water flow path;
a circulating water cooling mechanism that cools the circulating water in the circulating water flow path,
a high-pressure water pipe in which the circulating water flow path sends the pressurized circulating water from the circulating water supply section to the water pressure motor;
a low-pressure water pipe that returns the circulating water from the water pressure motor to the circulating water supply section,
The circulating water cooling mechanism has a cooling piping section arranged so that at least a portion of the high pressure water pipe and the low pressure water pipe can come into contact with the raw water before or during the suction from the water intake port,
The cooling piping part has a spiral part in which at least one of the high pressure water pipe and the low pressure water pipe is arranged in a spiral shape,
The casing includes a suction pipe having the water suction port at the lower end and disposed in a water absorption tank in which the raw water is stored,
A pump characterized in that the spiral portion is wound around the outer peripheral surface of the suction pipe . The pump according to claim 1 or 2 ,
A pump characterized in that the cooling piping section includes cooling fins on an outer peripheral surface of at least one of the high-pressure water pipe and the low-pressure water pipe. The pump according to claim 1 or 2 ,
A pump characterized in that the cooling piping section includes a portion where at least one of the high-pressure water pipe and the low-pressure water pipe branches into a plurality of branch pipes.

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