JP2022015381A - pump - Google Patents

Abstract

To provide a pump capable of simplifying management and facilities without using a submerged motor.SOLUTION: The pump includes a rotary shaft 3 mounted with an impeller 2 and adapted to be rotationally driven, a hydraulic motor 4 for rotationally driving the rotary shaft, a casing 5 rotatably supporting the impeller inside and having a water absorption port 5a at the end for absorbing raw water W, a circulation water flow path 6 for feeding circulation water to the hydraulic motor, a circulation water supply part 7 installed outside the casing for feeding the circulation water pressurized via the circulation water flow path to the hydraulic motor 4, and a circulation water cooling mechanism 8 for cooling the circulation water in the circulation water flow path.SELECTED DRAWING: Figure 1

Description

The present invention relates to a vertical shaft pump for emergency drainage and a pump for civil engineering temporary construction drainage or agricultural water supply / drainage.

It is known that vertical shaft pumps for emergency drainage in the event of a water disaster such as heavy rain or typhoon due to abnormal weather, and pumps for temporary civil engineering work drainage or agricultural water supply / drainage have a built-in dry submersible motor. For pumps using this submersible motor, maintenance such as pulling up the submersible motor and storing it in a warehouse or the like is required during the non-flood season such as winter.
For example, Patent Document 1 describes a pump device in which a submersible motor pump is arranged in a column pipe.

Japanese Unexamined Patent Publication No. 2013-217299

The following problems remain in the above-mentioned conventional technique.
In pumps that use dry submersible motors, the submersible motor is a large motor with an air layer inside and is an electrical device, so it has a complicated structure such as a watertight structure. There was a tendency for the life to be shortened due to dielectric breakdown and the like. Therefore, as described above, complicated maintenance and management for pulling up and storing the submersible motor from the pump during the non-flood season is required, and the cost is high.
In addition, in conventional equipment, power is supplied from the diesel engine for the generator via a high-pressure switchboard with a built-in reduced voltage starter (reactor condolfer) to the power source for driving the submersible motor pump. Building equipment was also needed to house the high-pressure switchboard and the 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 capable of simplifying management and equipment without using a submersible motor.

The present invention has adopted the following configuration in order to solve the above problems. That is, the pump according to the first invention has a rotary shaft to which an impeller is attached and rotationally driven, a hydraulic motor that rotationally drives the rotary shaft, and a hydraulic support that rotatably supports the impeller inside and sucks up raw water. A casing having a water suction port at the end, a circulating water flow path for sending circulating water to the hydraulic motor, and the circulating water installed outside the casing and pressurized via the circulating water flow path are sent to the hydraulic motor. It is characterized by including a circulating water supply unit and a circulating water cooling mechanism for cooling the circulating water in the circulating water flow path.

This pump is equipped with a circulating water supply unit that is installed outside the casing and sends pressurized circulating water through the circulating water flow path to a hydraulic motor, 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 that is simple to manage and equipment, not by electrical equipment, and the circulating water can be cooled by the circulating water cooling mechanism to suppress overheating of the hydraulic motor.

In the first invention, the pump according to the second invention has a high-pressure water pipe in which the circulating water flow path sends the circulating water pressurized from the circulating water supply unit to the hydraulic motor, and the circulating water from the hydraulic motor. The supply unit is provided with a low-pressure water pipe for returning the circulating water, and the circulating water cooling mechanism arranges the high-pressure water pipe and at least a part of the low-pressure water pipe so as to be in contact with the raw water before or during the suction from the water suction port. It is characterized by having a cooling pipe portion.
That is, in this pump, the circulating water cooling mechanism has a cooling pipe portion in which at least a part of the high-pressure water pipe and the low-pressure water pipe is arranged so as to be in contact with the raw water before or during the suction from the water suction port. When the cooling pipes of the high-pressure water pipe and the low-pressure water pipe come into contact with the raw water, efficient heat dissipation of the circulating water becomes possible.

A pump according to a third aspect of the invention is characterized in that, in the second invention, the cooling piping portion includes a high-pressure water pipe and a portion in which at least a part of the low-pressure water pipe is arranged in the casing. ..
That is, in this pump, since the cooling pipe portion includes a portion in which at least a part of the high-pressure water pipe and the low-pressure water pipe is arranged in the casing, the cooling pipe portion is lubricated by contacting the raw water flowing in the casing. The water can be cooled.

In the pump according to the fourth invention, in the second or third invention, the water suction port of the casing is arranged in the water absorption tank in which the raw water is stored, and the cooling piping portion is the high pressure water pipe and the high pressure water pipe. It is characterized by having a portion in which at least a part of the low pressure water pipe is in contact with the raw water in the water absorption tank.
That is, in this pump, since the cooling pipe portion includes a portion in which at least a part 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 cooling pipe is provided in the raw water stored in the water absorption tank. The lubricating water can be cooled by contacting the portions.

In any one of the second to fourth inventions, the pump according to the fifth invention has the cooling pipe portion provided with cooling fins on at least one outer peripheral surface of the high-pressure water pipe and the low-pressure water pipe. It is a feature.
That is, in this pump, since the cooling piping portion is provided with cooling fins on at least one outer peripheral surface of the high-pressure water pipe and the low-pressure water pipe, the circulating water can be cooled more effectively by heat radiation from the cooling fins.

The pump according to the sixth invention has, in any one of the second to fifth inventions, the cooling pipe portion having a spiral portion in which at least one of the high-pressure water pipe and the low-pressure water pipe is spirally arranged. It is characterized by being.
That is, in this pump, since the cooling piping portion has a spiral portion in which at least one of the high-pressure water pipe and the low-pressure water pipe is spirally arranged, the contact area with the raw water is increased by the spirally arranged portion. As a result, the heat dissipation is improved, and the circulating water can be cooled more effectively.

The pump according to the seventh invention includes, in any one of the second to sixth inventions, a portion where the cooling pipe portion has a portion in which at least one of the high-pressure water pipe and the low-pressure water pipe is branched into a plurality of branch pipes. It is characterized by being.
That is, in this pump, since the cooling pipe portion includes a portion in which at least one of the high-pressure water pipe and the low-pressure water pipe is branched into a plurality of branch pipes, the contact area with the raw water is increased by the portion branched into the plurality of branch pipes. It increases and the heat dissipation is improved, and the circulating water can be cooled more effectively.

According to the present invention, the following effects are obtained.
That is, according to the pump of the present invention, a circulating water supply unit installed outside the casing and sending pressurized circulating water through the circulating water flow path to the hydraulic motor, and circulating water for cooling the circulating water in the circulating water flow path. Since it is equipped with a cooling mechanism, the impeller can be driven by a hydraulic motor that simplifies management and equipment, and the circulating water cooling mechanism can cool the circulating water to suppress overheating of the hydraulic motor.
Therefore, the pump of the present invention eliminates the need for a submersible pump, eliminates the need for short-circuit accidents due to flooding, eliminates the need for complicated maintenance and building equipment for high-voltage switchboards, and reduces management / equipment costs and power consumption, resulting in low cost. It becomes possible to change.

It is a cross-sectional view of the whole which shows 1st Embodiment of the pump which concerns on this invention. It is a cross-sectional view of the whole which shows the 2nd Embodiment of the pump which concerns on this invention. It is an overall sectional view which shows the 3rd Embodiment of the pump which concerns on this invention. It is sectional drawing of the main part which shows the 4th Embodiment of the pump which concerns on this invention.

Hereinafter, the first embodiment of the pump in the present invention will be described with reference to FIG.

The pump 1 in the present embodiment is, for example, an emergency drainage pump for a river, and as shown in FIG. 1, a rotary shaft 3 to which an impeller 2 is attached and rotationally driven, and a water pressure for rotationally driving the rotary shaft 3 The motor 4, the casing 5 having a water suction port 5a at the end that rotatably supports the impeller 2 and sucks up the raw water W, the circulating water flow path 6 that sends the circulating water to the hydraulic motor 4, and the casing 5. It is provided with a circulating water supply unit 7 that is installed externally and sends pressurized circulating water via the circulating water flow path 6 to a hydraulic motor 4, and a circulating water cooling mechanism 8 that cools the circulating water in the circulating water flow path 6. ..

The pump 1 of the present embodiment is a column-type vertical shaft pump for emergency drainage in the event of a water disaster, in which the casing 5 is vertically installed with the water suction port 5a at the lower end and the hydraulic motor 4 is arranged in 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 unit 7 to the hydraulic motor 4, and a low-pressure water pipe 6B that returns the circulating water from the hydraulic motor 4 to the circulating water supply unit 7. There is.

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

In the present embodiment, one cooling fin 9 is attached to both the high-pressure water pipe 6A and the low-pressure water pipe 6B.
The cooling fin 9 has a long plate shape extending vertically along the high-pressure water pipe 6A and the low-pressure water pipe 6B, and is made of a metal plate having high corrosion resistance such as stainless steel.
In FIG. 1, the cooling fins 9 are hatched for the sake of 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 the 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 rotary shaft 3 is rotatably supported in the casing 5 via a bearing 3a or the like using a bearing or the like.

The impeller 2 is made of, for example, stainless steel or the like, 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 rotated in the same direction as the rotation direction of the rotation shaft 3.
The high-pressure water pipe 6A and the low-pressure water pipe 6B are made of a metal having high corrosion resistance 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 the present embodiment is installed by suspending the upper part of the casing 5 by fixing it to a pump base (base plate) (not shown) attached to an installation hole formed in an installation floor (not shown) above the suction water tank. ing.

As described above, in the pump 1 of the present embodiment, the circulating water supply unit 7 which is installed outside the casing 5 and sends the pressurized circulating water to the hydraulic motor 4 via the circulating water flow path 6 and the circulation in the circulating water flow path 6. Since the circulating water cooling mechanism 8 for cooling the water is provided, the impeller 2 is driven by the hydraulic motor 4 which is not an electric device but has simple management and 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 portion 10 in which at least a part of the high-pressure water pipe 6A and the low-pressure water pipe 6B is arranged so as to be in contact with the raw water W before or during the suction from the water suction port 5a. Therefore, the cooling pipe portion 10 of the high-pressure water pipe 6A and the low-pressure water pipe 6B comes into contact with the raw water W, so that the circulating water can be efficiently dissipated.

Further, since the cooling pipe portion 10 includes a portion in which at least a part of the high-pressure water pipe 6A and the low-pressure water pipe 6B is arranged in the casing 5, the cooling pipe portion 10 comes into contact with the raw water W flowing in the casing 5. This makes it possible to cool the lubricating water.
In particular, since the pump 1 of the present embodiment is a vertical shaft pump in which the casing 5 is vertically installed with the water suction port 5a at the lower end and the hydraulic motor 4 is arranged in the casing 5, river water or the like sucked up from the water suction port 5a at the lower end. The hydraulic motor 4 can be cooled by contacting the raw water W of the above with the portions of the high-pressure water pipe 6A and the low-pressure water pipe 6B to dissipate the circulating water.

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

Next, the second to fourth embodiments of the pump according to the present invention will be described below with reference to FIGS. 2 to 4. In the following description of each embodiment, the same components described in the above embodiment are designated by the same reference numerals, 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 axis as shown in FIG. It is a tubular pump that is a pump.
That is, in the second embodiment, the water absorption port 5a of the raw water W is provided at one end of the casing 25 having the 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 by horizontally arranging the rotating shafts 3. The rotary shaft 3 of the impeller 2 and the hydraulic motor 4 is connected via a speed reducer 24a.

Further, the second embodiment is different from the first embodiment in that the cooling piping portion 20 includes a spiral portion 29 in which at least a part of the high-pressure water pipe 6A and the low-pressure water pipe 6B is arranged in the casing 25. ..
That is, the high-pressure water pipe 6A and the low-pressure water pipe 6B are connected to the hydraulic 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 is spirally arranged. It is the spiral portion 29 of the spiral coil.

As described above, in the pump 21 of the second embodiment, the cooling pipe portion 20 has a spiral portion 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 is increased to improve heat dissipation, and the 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 the hydraulic motor 4 installed in the casing 25, whereas the pump 31 of the third embodiment is installed. Then, 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 in a state where the water suction port 5a at the lower end is inserted in the raw water W stored in the water suction tank T1.
The casing 35 includes a casing main body 35b that is connected to the upper part of the suction pipe 35a and is installed on the upper part of the water absorption tank T1 to rotatably house the impeller 2.

Further, in the third embodiment, the cooling piping portion 30 includes a portion in which at least a part of the high-pressure water pipe 6A and the low-pressure water pipe 6B is in 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 wind around the outer peripheral surface of the suction pipe 35a of the casing 35 to form the spiral portion 39, and the spiral portion 39 is inside the water absorption tank T1. It is possible to directly contact the raw water W of.

The impeller 2 is connected to a rotary 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 main body 35b is rotationally driven by the hydraulic motor 4, the raw water W of the water suction tank T1 is sucked up from the water suction port 5a, and the suction pipe 35a and the casing main body are sucked up. It is discharged into the discharge tank T3 via 31a and the discharge pipe 35B.

A part of the high-pressure water pipe 6A and the low-pressure water pipe 6B is also arranged in the water tank T2 for replenishing the water absorption tank T1 and is in contact with the water in the water tank T2 for replenishment.
As described above, in the pump 31 of the third embodiment, the cooling pipe portion 30 has a portion (spiral portion 39 or the like) in which at least a part 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. Since it is provided, the lubricating water can be cooled by the cooling piping portion 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 the high-pressure water pipe 6A and the low-pressure water pipe 6B both extend into the casing 5 is a cooling pipe. In contrast to the section 10, in the pump 41 of the fourth embodiment, as shown in FIG. 4, the cooling piping section 40 has a plurality of branches of the high-pressure water pipe 6A and the low-pressure water pipe 6B in the casing. The point is that the pipe 48a is provided with a branched portion.

That is, the cooling pipe portion 40 includes a multi-steel pipe portion 48 composed of a plurality of branch pipes 48a.
In the pump of the present embodiment, both the high-pressure water pipe 6A and the low-pressure water pipe 6B are provided with a cooling pipe portion 40 provided with a plurality of branch pipes 48a (in FIG. 4, many connected to the high-pressure water pipe 6A). The steel pipe portion 48 is illustrated.).
The multi-steel pipe portion 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 above the multi-steel pipe main body 48b, and a multi-steel pipe main body. It is provided with a circulating water discharge chamber 48d, which is a space provided in the lower part of the 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, in the multi-steel pipe main body 48b, a raw water inflow port 48e capable of allowing the raw water W sucked up in the casing to flow in and flow around the plurality of branch pipes 48a is provided, and the multi-steel pipe main body 48b is provided. A raw water discharge port 48f capable of draining the raw water W inside is provided in the casing.

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 circulates in the multi-steel pipe main body 48b and around the plurality of branch pipes 48a. After being dissipated by the flowing raw water W, it is sent to 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 pipe portion 40 includes a portion (multi-steel pipe portion 48) in which at least one of the high-pressure water pipe 6A and the low-pressure water pipe 6B is branched into a plurality of branch pipes 48a. The portion branched into the plurality of branch pipes 48a (multi-steel pipe portion 48) increases the contact area with the raw water W, enhances heat dissipation, and can cool the circulating water more effectively.

The present invention is not limited to each of the above embodiments, and various modifications 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 embodiment, and the spiral portions of the second and third embodiments may be provided in the first embodiment and the fourth embodiment. Further, a plurality of branch pipes of the fourth embodiment may be provided in the other embodiment.

1,2,31 ... Pump, 2 ... Impeller, 3 ... Rotating shaft, 4 ... Hydraulic 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 fins, 10, 20, 30, 40 ... Cooling piping section, 29, 39 ... Spiral section, 48a ... Branch pipe, T1 ... Water absorption tank , W ... Raw water

Claims (7)

A rotating shaft to which an impeller is attached and driven to rotate,
A hydraulic motor that drives the rotation axis to rotate, and
A casing that rotatably supports the impeller inside and has a water inlet at the end that sucks up raw water.
A circulating water flow path that sends circulating water to the hydraulic motor,
A circulating water supply unit installed outside the casing and sending the circulating water pressurized through the circulating water flow path to the hydraulic motor, and a circulating water supply unit.
A pump including a circulating water cooling mechanism for cooling the circulating water in the circulating water flow path. In the pump according to claim 1,
The circulating water flow path is a high-pressure water pipe that sends the circulating water pressurized from the circulating water supply unit to the hydraulic motor.
A low-pressure water pipe for returning the circulating water from the hydraulic motor to the circulating water supply unit is provided.
The circulating water cooling mechanism is characterized by having a cooling pipe portion in which at least a part of the high-pressure water pipe and the low-pressure water pipe is arranged so as to be in contact with the raw water before or during suction from the water suction port. And the pump. In the pump according to claim 2,
A pump characterized in that the cooling piping portion includes a portion in which at least a part of the high-pressure water pipe and the low-pressure water pipe is arranged in the casing. In the pump according to claim 2 or 3.
The water suction port of the casing is arranged in a water absorption tank in which the raw water is stored.
A pump characterized in that the cooling piping portion includes a portion in which at least a part 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. In the pump according to any one of claims 2 to 4.
A pump characterized in that the cooling piping portion is provided with cooling fins on at least one outer peripheral surface of the high-pressure water pipe and the low-pressure water pipe. In the pump according to any one of claims 2 to 5.
A pump characterized in that the cooling piping portion has a spiral portion in which at least one of the high-pressure water pipe and the low-pressure water pipe is spirally arranged. In the pump according to any one of claims 2 to 6.
A pump characterized in that the cooling piping portion includes a portion in which at least one of the high-pressure water pipe and the low-pressure water pipe is branched into a plurality of branch pipes.

Images