JPS6018811B2 - underwater pump - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pump, in particular a so-called submersible pump, which is introduced into the water to be discharged.

Pumps can be classified according to their installation location into two types: regular pumps that are installed on the ground, and so-called submersible pumps that are placed into the water to be discharged. Conventionally, most of the known submersible pumps obtain their driving power from an electric motor, and cannot be used in places without a power source. Additionally, there are restrictions on its use, such as the need for a driving source (power source) such as a generator. These drawbacks can be improved by encapsulating the engine and incorporating it into a submersible pump.

An engine-type submersible pump has an engine located underwater, and its exhaust pipe passes through the surrounding water and closes above the water surface. Therefore, the exhaust pipe is cooled by the surrounding water to be discharged, and the exhaust gas is discharged at a low temperature. However, in order to operate the engine continuously, it is necessary to discharge the condensed water that has formed in the exhaust pipe. The object of the present invention is to provide a submersible pump that can force water droplets in an exhaust pipe to flow out. Therefore, according to this invention, an engine is enclosed in a capsule, and one end of each of the intake pipe and exhaust pipe of the engine is placed above the water surface, and the exhaust pipe is cooled by surrounding water.

The engine provides driving force, and the capsule housing the engine is cooled by the surrounding water, allowing continuous operation. Furthermore, the temperature of the exhaust gas in the exhaust pipe is greatly reduced because the exhaust pipe itself is cooled by surrounding water and is also directly cooled by water particles or water droplets generated on the inner surface of the exhaust pipe. Water droplets generated on the inner surface of the exhaust pipe are forcibly drained into the invera casing by a water collection means 25 disposed between the exhaust pipe and the invera casing. Embodiments of the present invention will be described in detail below with reference to the drawings.

As shown in FIGS. 1 and 2, a submersible pump 10' according to the present invention includes a capsule 14 that is liquid-tightly housed in an engine 12, and a strainer 18 that houses an inflator 16 and is located below the capsule. are doing.

The capsule 14 is configured to be divisible into two half capsules 19 and 20. and lower half capsule 2
0 includes a support part 22 from which an arcuate support arm 24 extends upwardly along the inner wall of the upper half capsule 19. And this support arm 24
A cover nut 28 is screwed into the screw hole 25 of the upper half capsule 19 through a through hole 26 of the upper half capsule 19. Therefore, by unscrewing the cover nut 28, the upper half capsule 19 can be separated from the lower half capsule 20, thereby exposing the upper part of the engine 12, making it easy to start the engine or perform maintenance on the engine itself. I can do it. Further, a water tank for cooling the engine, for example a cooling tank 30, is fixed below the strainer 18. And intake pipe 32, exhaust pipe 33 and drainage hose 3
4 extend from the capsule 14 or the strainer 18, and it goes without saying that the entrances of these pipes are located above the water surface when the submersible pump 10 is installed. In this case, the intake pipe 32 and the exhaust pipe 33 are each composed of a steel pipe at the lower part and a flexible hose such as a vinyl hose or a rubber hose, which is iron-bonded to the iron pipe at the upper part. On the other hand, the drain hose 34 can be constructed from a flexible hose such as a vinyl hose or a rubber hose. 3 engine controls. - A control panel 36 and a fuel tank 37 for the vehicle are compactly integrated and placed on the ground. It is preferable that these be integrated into a wagon to facilitate transportation. Cables 38 and 3 and a fuel hose 39 are connected to the inside of the engine 12 via an intake pipe 32. The peripheral wall of the strainer 18 has a number of holes 40 for sucking water to be discharged.
This hole is formed to prevent dust from being sucked in. 40 As can be clearly seen from FIG. 2, the output shaft 21 of the engine 12 is supported by the support portion 22 via a plurality of bearings 42.

Additionally, a mechanical seal 43 is provided at the lower end of the support portion 22.
is installed. An oil chamber 44 is formed around the output shaft 21 by a bearing 42 and a mechanical seal 43. A pump 45 is disposed inside the cooling tank 30, and this pump 45 is connected to the output shaft 21.
is attached to the bottom end of the The cooling tank 30 stores cooling water that is isolated from surrounding water, and this cooling water is sent to the engine cooling water passage by a pump 45 through a cold water pipe 46 to remove heat from the engine. It is returned to the cooling JO tank via pipe 48. This return pipe 4
8, when the water to be discharged is sucked into the strainer 18 through the suction hole 40 and given a large flow rate,
They are arranged in a variety of shapes so that they can be effectively cooled by this running water. Therefore, the circulating cooling water in the cooling tank lamp 30 is cooled by the surrounding still water, and the suction hole 4
Since it is also cooled by running water blown in from zero, a sufficient cooling effect can be maintained at all times. In addition, since the pump 45 is attached to the lower end of the output shaft 21, the configuration is simple and zero, and since it is configured to cooperate with the engine 12, it always operates when the engine is operating, reliably and effectively. This provides excellent operation. However, the mounting position of the pump 45 is not limited to the lower end of the shaft 21, and a negative shaft may be provided somewhere and operated by a pulley, V-belt, etc. If it is an electromagnetic pump, it can be installed anywhere. The engine is cooled by a closed circulation water cooling system, and cooling water must be kept in the cooling water tank at all times, so the water tank is located at a zero level equal to or lower than the invera and below the level of the suction hole. It is necessary to do so.

In such a configuration, the cooling water is cooled by the water flow sucked in and surrounding static water when draining water, and by the static water even when water is not being sucked in, so that the cooling water is always kept at a low temperature. Although the closed end of the exhaust pipe 33 is located above the water surface, most of the exhaust pipe 33 is underwater, so that it is cooled not only by the surrounding water but also by water particles generated on the inner surface.

Exhaust gas is usually not 200℃, even though it is 250℃)
However, such an exhaust pipe cooling system significantly lowers the temperature, and according to experiments, the exhaust gas temperature can be reduced to 50 to 60 degrees. Since the temperature of the exhaust gas is lowered in this way, the upper end of the exhaust pipe can be configured with a low-cost hose such as a pineal hose or a rubber hose, without having to install only iron pipes.
In this way, when flexible pipes such as vinyl hoses and rubber hoses are installed loosely together, the range of use of the submersible pump is expanded compared to when piping is only made from rigid pipes such as iron pipes, and it is also easier to carry. preferable. It goes without saying that in this case, the intake pipe 32 can be constructed using a flexible pipe such as the above-mentioned vinyl hose or rubber hose due to its function. Preferably, the exhaust pipe 33 is configured to collect water droplets generated by the growth of water particles to actively enhance the cooling effect.

Therefore, as can be seen from FIG. 3, the lower end of the exhaust pipe 33 can be wrapped around the engine capsule 14 or a cooling chamber can be provided. For example, this partially circular wrapping part is located almost horizontally, but has a slightly downward slope in the direction of the water collection chamber to promote the flow of water to the water collection means 49 (details will be described later). have. It goes without saying that the winding portion may be formed into a multi-layer coil shape as needed. In addition, the winding part with such a slope prevents the flow of water droplets to the engine, so the exhaust pipe is connected to the engine 1.
It can be extended from the second leg. When submersible pump 1 is placed in water, it is positioned vertically with the cooling tank facing downward.

Therefore, when the submersible pump 10 is completely submerged in water, the exhaust pipe 33 is also almost completely submerged in water, and the exhaust gas can be directly and sufficiently cooled as described above. Therefore, the exhaust pipe 33 is usually composed of a single pipe, as shown in FIG. 4A. However, to further enhance the cooling effect, the exhaust pipe 33 can be made into multiple pipes, for example double pipes, and a portion of the waste water can be introduced into the outer pipes, as shown in FIG. 4B. In this system, where the exhaust pipe 33 is made of multiple pipes and water is introduced into the outer pipe to forcibly cool the exhaust gas in the inner pipe, the water is shallow, so the submersible pump is only partially submerged and the exhaust pipe is closed. Particularly effective when exposed to air. A casing 52 is disposed inside the strainer 18, and the inflator 16 is housed within this casing.

The air within the casing 52 remains within the casing even after the submersible pump 10 is put into the water. Although the residual air is gradually removed from the drain hose 34 together with the pressurized water generated by the rotation of the inveter, the drainage efficiency in the initial stage is reduced due to the influence of the residual air. The remaining air can be forcibly removed through a drain hole with a valve (not shown), or by other methods. If the exhaust pipe 33 is a multi-layered pipe and some of the waste water is introduced into the outer pipe, a hole is made in the outer pipe so that the water can freely flow in.
It may also be configured to flow out.

However, it is preferred that the cooling water in the outer zero tube is a forced water flow. It is most preferable if the remaining air in the casing 52 can be forcibly removed while supplying cooling water into the exhaust pipe 33. In this case, residual air needs to be removed quickly and temporarily in large quantities, whereas the supply of cooling water to the exhaust pipe needs to be permanent, even if only in small quantities. be done. Such technical requirements can be met by a connecting pipe 501 with a flow rate control valve as shown in FIG. 5A. A connecting pipe with a flow rate control valve 5 is disposed between the exhaust pipe 33 and the casing ring 52 (see FIG. 2).

As shown in FIG. 5A, a flow control valve 51 is provided at the middle of the connecting pipe 5, and this flow control valve is provided with a valve ball 4. Further, the flow rate control valve 51 includes a pair of chamfered valve seats 55 and 6, and each valve seat has, as shown in FIGS. 6A and 6B,
For example, it has four inclined bypasses 57,58. In this case, the bypass 57 formed on the upper valve seat 55 is configured to be smaller in its lateral cross section than the bypass 58 formed on the lower valve seat 56. When the invera 16 rotates together with the engine 12, the remaining air in the invera casing 52 flows out into the exhaust pipe 33 through the large bypass 58 because the valve ball 54 is pressed against the lower valve seat 56 by its own weight. When all the remaining air flows out, the original function of the pump works effectively, and the drainage is completely introduced into the casing 52 as the invera 16 rotates. The amount of waste is reduced to 0. At this time, the valve hole 54 of the flow control valve 51 is located at the fifth
As shown in Figure B, it is moved upward by water pressure and pressed against the upper valve seat. A portion of the waste water then flows out into the exhaust pipe 33 via a small bypass 57. As mentioned above, the flow control valve 51 of the connecting pipe 50 has a bypass 58 with a large cross-sectional area on the lower valve seat 56, and a large amount of the remaining air in the invera casing flows out through this large bypass, so that the remaining air Air can be removed quickly.

Furthermore, when residual air flows out and waste water flows through the flow rate control valve 51, water pressure presses the valve pole 54 against the valve seat 55 above and passes through the bypass 57 with a small cross-sectional area, so that a large amount of water does not flow out. Only a small amount of water that is prevented and limited is permanently discharged into the exhaust pipe 33.As described above, a connecting pipe 50' with a flow control valve is provided for cooling in the outer pipe of the exhaust pipe 33 consisting of a double pipe. It acts to supply part of the wastewater. As the exhaust pipe 33 is cooled, water particles adhering to the inner surface of the exhaust pipe 33 grow into water droplets, which further become a water stream and flow downward within the exhaust pipe 33.

The temperature of the exhaust gas flowing inside the exhaust pipe 33 is 2 as described above.
Since the temperature drops sharply and greatly from 0.00 to 250.30°C to 50 to 60°C, considerable water droplets are generated. Although these water droplets have a cooling effect, if they accumulate in large quantities, they pose a danger of obstructing the free flow of exhaust gas. While the engine is running,
The amount of water that accumulates in the exhaust pipe gradually increases, so it is necessary to remove the accumulated water. From the standpoint of cooling effect, it is also preferable to remove water after cooling the exhaust gas to encourage the generation of new water droplets. Therefore, in the case of the submersible pump 1 of the embodiment, the lower end of the exhaust pipe 33 forms a slightly inclined winding part, and a water collection means 49 shown in FIG. 7 is disposed at the lowest level. . The water collection means 49 includes a water collection pipe 60 with a check valve, as shown in FIG.

One end of this water pipe 60 is screwed into the exhaust pipe 33, and the end of the water pipe 60 is connected to the invera casing 52 via fittings 61 and 62. And the water collection pipe 60 is connected to the casing 5
The open end 65 of this channel faces the area of negative pressure generated by the inflator. The water collection means 49 may be configured such that the open end of the water-building pipe 60 directly faces the negative pressure generation area of the inverator, without providing the flow path 64 of the casing 52.
4 A check valve 6 is installed in the middle of the water collection pipe 60.
6 are arranged. This check valve 66 is connected to the exhaust pipe 33.
The valve ball 68 is pressed against the valve seat by a conical spring 67 to allow water to flow from the casing 52 to the casing 52 and prevent water from flowing in the opposite direction. The water collection pipe 60 then connects the check valve 66 and the exhaust pipe 33 to a water collection chamber 70 where the water deposited in the exhaust pipe 33 is temporarily stored.
It is prepared in between. When the inveler 16 rotates, centrifugal force is applied to the water existing near the tip of the inveler, and in contrast, water flows into the invera casing in the negative pressure generating area of the invera, that is, at the base of the invera. Water creates negative pressure. Since the entrance end 65 of the flow path 64 connected to the water collection pipe 60 faces the negative pressure generation region of the inveter, a suction force is generated in the passage from the entrance machine to the check valve 66. Therefore, check valve 66
The valve ball 68 separates from the valve seat against the biasing force of the spring 67, and the water in the water collection chamber 70 flows out into the casing 52 via the check valve 66 and the drain 64. Mulberry water room 7
This outflow of water from 0 to the casing 52 is continuous during the rotation of the inveter 16, thus ensuring a free flow of exhaust gases. 0 FIG. 8 shows another embodiment of this invention. This submersible pump has a horizontal structure in which an engine and an inflator are spaced apart from each other in the lateral direction. The reference numerals of the components of this submersible pump 110 are indicated by adding 100 to those of the corresponding parts of the vertical submersible pump 10 shown as the first embodiment. The capsule 1 14 of the horizontal submersible pump 1 10 is not in the form of a splittable half capsule, and maintenance of the engine 112 and the like can be performed by opening the capsule cover 76. This submersible pump 011 has a wide bottom surface, making it stable and easy to set to the correct hem state when placed in water. In addition, the submersible pump 110 can be configured to have a smaller height than the vertical submersible pump 10', and the suction hole 140 can be formed at a lower position, so it can sufficiently perform its function even when placed in shallow water. can. As mentioned above, the submersible pump according to the present invention uses the engine to obtain the driving force for the inveter, and the capsule that seals the engine is easily cooled by the surrounding water, so it is small and has high output that can be operated continuously. submersible pump is obtained.

The engine's exhaust pipe passes through the drainage water, with one end above the water surface, and most of the exhaust pipe is cooled by the surrounding water. The exhaust gas in the exhaust pipe is cooled by water around the exhaust pipe, and is also directly cooled by water particles or water droplets formed on the inner surface of the exhaust pipe, so that its temperature is sufficiently lowered. Water droplets generated on the inside of the exhaust pipe are forcibly drained into the invera casing by the water collecting means installed between the exhaust pipe and the invera casing, allowing continuous operation without any problems. can be done.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of a vertical submersible pump according to an embodiment of the present invention, FIG. 2 is a vertical sectional view of the vertical submersible pump, and FIG. 3 is a vertical sectional view of the vertical submersible pump showing the lower end of the exhaust pipe. Cross-sectional views, Figures 4A and 4B are cross-sectional views of the exhaust pipe, Figures 5A and 5B are longitudinal cross-sectional views of the connecting pipe, and Figures 6A and 6B are lines VIA-VIA and VIB-V of Figures 5A and 5B. Cross section along the rice field, No. 7
The figure is a longitudinal sectional view of the water collection means, and FIG. 8 is a schematic perspective view of a horizontal submersible pump according to another embodiment. 10,110... Submersible pump, 14,114... Capsule, 18,118... Strainer, 32,132...
...Intake pipe, 33,133...Exhaust pipe, 34,1
34...Drain hose, 40,140...
・Suction hole, 30...Cooling tank, 38...
・Electric cable. Figure 1 Figure 2 Figure 3 Figure 4A Figure 4B Figure 5A Figure 58 Figure 6A Figure 68 Figure 7 Figure 8

Claims (1)

[Claims] 1. An engine is enclosed in a capsule, one end of each of the intake pipe and exhaust pipe of the engine is opened above the water surface, the exhaust pipe is cooled with water, and the impeller is cooled as the impeller rotates. A submersible pump that has a water collection means installed between the exhaust pipe and the impeller casing that uses the negative pressure of the water flowing into the casing to forcibly drain the water in the exhaust pipe. 2. The water collecting means includes a check valve that allows water to flow from the exhaust pipe to the impeller casing and prevents water from flowing in the opposite direction, and a check valve that is disposed between the check valve and the exhaust pipe to temporarily collect water in the exhaust pipe. 2. The submersible pump according to claim 1, further comprising a water collection chamber for retaining water. 3. The submersible pump according to claim 1 or 2, wherein the upper end of the exhaust pipe is formed of a flexible hose.