JP2024176522A - Pumping equipment for lifting or siphoning water - Google Patents

Abstract

To provide a small-diameter practical pumping device capable of performing water pumping and siphon drainage.SOLUTION: In a pumping device for performing water pumping and siphon drainage, a lower end of a water suction pipe 11 for pumping water is immersed into water of a water absorbing region, and upwardly extending a water supply pipe 13 interconnected to an upper end of the water suction pipe 11 is extended upwardly so as to pump water, or the water supply pipe 13 for performing siphon drainage to outside a water region lower than a water level b of the water absorbing region is provided, and the water suction pipe 11 immersed into the water of the water absorbing region is vibrated in a vertical direction so as to exhaust air from the inside of the water suction pipe 11 by a change of an inner volume of the water suction pipe 11 or an inertial force of the water suction pipe 11, thereby pumping water to a higher place or performing siphon discharge.SELECTED DRAWING: Figure 1

Description

The present invention provides a small-diameter, low-head pump and a pump that performs siphon drainage to facilitate the use of siphon pumps, such as kerosene pumps used to fuel oil stoves, for irrigation water intake and drainage of industrial water tanks. It also provides a device that uses a head difference to drive a water ejector to extract air and make it easier to start large-diameter siphon drainage and water intake without any power.

In order to start siphon drainage, the siphon pipe or siphon hose installed at a high level must be primed to a nearly full state. In the case of a small diameter hose, it is relatively easy to use a hose that is already full of water, or to manually prime it, but for pipes with a diameter that makes it difficult to seal the end with fingers, manual priming becomes difficult and a mechanical rotary pump or vacuum pump is required, making siphon drainage a popular option.

Utility model registration No. 3136087 Patent Publication 2010-048100 Patent Publication 2007-177752

Simple manual siphon pumps with a caliber size of up to about 15A are readily available on the market, but for calibers of 20A or more used for transferring water and liquids in factories and facilities, a rotary mechanical manual pump is required, so even in situations where siphon drainage is possible, an electric or engine pump is chosen and used in continuous operation, resulting in convenience being chosen over energy conservation.
Furthermore, rotary mechanical vacuum pumps are used for removing and discharging sludge using large diameter siphon drainage in water treatment and sewerage facilities, but corrosion due to polluted water and the suction noise during operation often become problems as the pump deteriorates over time, and there is a need for a lifting pump or a means for starting siphon drainage that can solve these problems.

Although the use of manual water pumps with small water volumes and small heads and siphon drainage systems with large water volumes and long operating times are very limited in terms of the conditions of use, the energy-saving and economic benefits are great, and we live in an age where their active use should be promoted.

The pumping action of the pump of this invention is performed by immersing the lower end of a suction pipe of a fixed length in the water in the suction area with the open end, closing the upper end of the suction pipe and fitting an exhaust valve, and shaking the suction pipe up and down.When the suction pipe is shaken up and down, the inertial resistance of the water below in the pipe, which cannot quickly follow the upward vibration, creates a negative pressure inside the pipe that is greater than the increase in the void volume inside the pipe. Water outside below is sucked in and the water inside the pipe rises. This, combined with the synergistic effect of the reduction in the void caused by the downward vibration, causes the air inside the pipe to be expelled through the exhaust valve, and at the next point, negative pressure is created inside the pipe, creating a pumping action that sucks in the water below, and this process is repeated to perform pumping.
When vibration is applied after the suction pipe is filled with water, all the water in the pipe is subjected to inertial force and discharged from the exhaust valve, and vibration can be continued to continue pumping.

In addition, if a foot valve (or check valve) is installed at the lower end of the suction pipe while the upper end is left open, and the lower end of the suction pipe is submerged in the water in the suction area and subjected to an earthquake, the water inside the pipe above the valve is held by the valve and is excited upwards, and as a result of inertia it is thrown upwards, sucking in water outside the pipe below the foot valve, and the inertia caused by the downward earthquake is received by the foot valve and dissipates, allowing pumping to occur. If the foot valve at the lower end is replaced with a check valve and installed at any height on the suction pipe, the same pumping action will occur and water can be pumped.

In a practical pump of the present invention that performs general pumping or siphon drainage, a foot valve is provided at the lower end of the suction pipe, and the upper end of the suction pipe is connected to a water supply pipe via a flexible pipe or the like that allows the suction pipe to move up and down.
When performing siphon drainage, the discharge end of the water supply pipe is made into a siphon piping that is extended to a specified position outside the water intake area that is lower than the water level of the water intake area, and an exhaust valve is provided near the top of the siphon piping. The suction pipe, immersed in the water of the water intake area, is vibrated vertically to pump water, and when sufficient water is pumped, siphon drainage will start naturally, and the vibration will be stopped to continue the siphon drainage.
When pumping water further upwards without siphoning, the water supply pipe is extended to a specified position at a high altitude and the suction pipe is vibrated to pump the water.
In the case of a structure in which an exhaust valve and a valve connected to the exhaust valve are provided at the upper side of the suction pipe, the valve is closed and the vibration is continued to pump water to a higher place.

In pumps used for pumping or siphoning when handling liquid containing solids, sludge, etc., no foot valves or check valves other than an exhaust valve are used in the suction pipe and supply pipe, and the upper end of the suction pipe is connected to the supply pipe via a flexible pipe or the like that allows it to move up and down, just like the pump described above.
When performing siphon drainage, the discharge end of the water supply pipe is made into a siphon piping that is extended to a specified position outside the suction area that is lower than the water level in the suction area, the discharge end of the piping is sealed with water, and the suction pipe is vibrated up and down to pump water, which naturally transitions to siphon drainage, and pipe siphon drainage is continued in which water containing solids can pass through without hindrance.

When pumping water further upward from the upper end of the suction pipe without using siphon drainage, the connected water supply pipe is extended to a specified position at a high altitude, a check valve is installed at the discharge end, and shaking is continued to pump water.
In this case, the check valve installed at the discharge end becomes less effective in exhausting and takes longer to pump water as the ratio of the amplitude of vibration applied to the suction pipe for pumping to the piping length, i.e., the length from the water surface in the suction area to the check valve at the discharge end, increases. For this reason, it is desirable to install the check valve near the suction pipe; however, the check valve, which is prone to problems due to entrapped solid matter, should be installed at the discharge end where it is easier to deal with.
The shut-off valve connected to the exhaust valve is opened to perform vibration at start-up, but after exhaust from the suction pipe is completed, water is discharged, so the valve is closed to continue pumping vibration and pump water upward.

The suction pipe can be made of steel, VP, aluminum, or other pipe materials, and the flexible pipe section that can accommodate vertical movement can be replaced by a combination of rotary joints or by making the suction pipe itself an expandable pipe. It is also possible to use a plastic suction hose that is one piece along its entire length, and by using splints, etc., to perform the siphon drainage and pumping described above.

There is a limit to the extent to which manual force can directly affect the vertical pumping of the suction pipe, but it can be driven up and down like a well pump using the principle of leverage, or it can be mechanically driven up and down using a crank mechanism, either manually or electrically.

In the first embodiment pump of the present invention, which opens the suction end directly without a foot valve to apply vibration and perform siphon drainage, there are no valves or other obstacles in the siphon piping, so when used to siphon drain slurry liquid or liquid containing solids, or to lift sand, mud, or remove sludge, there are no wear parts such as impellers like in rotary pumps, and even when pumping upward, the number of valves that are subject to severe wear is reduced to half compared to diaphragm pumps for this type of application.

When siphon drainage is performed as in the second embodiment in which a foot valve is provided at the suction end of the suction pipe to be vibrated, there is the convenience of automatically switching to siphon drainage when exhaust vibration is completed.
Furthermore, when pumping water to a high place from a suction pipe, there is no need to provide an exhaust valve or a check valve along the way, making it possible to make a simple pumping pump.

When the pump of the present invention is used in combination with a non-self-priming centrifugal pump to produce a self-priming pump for irrigation or construction drainage applications, the difference in operating efficiency based on structural factors between the self-priming pump and the non-self-priming centrifugal pump, as well as the length of operating time, results in a significant reduction in energy consumption, resulting in significant energy-saving effects and economic benefits.

In addition, the water drop taken by the siphon pump of this invention is used to drive the water ejector, making large-diameter siphon drainage completely powerless, which contributes to the removal of dam sediment and preventing volume buildup, taking irrigation water from reservoirs, and preventing disasters in reservoirs and natural dams that are prone to occur in remote mountainous areas by minimizing transport weight and time and maximizing economy.

FIG. 2 is an explanatory view of the device according to the first embodiment. (a) shows the cross-sectional structure of the check valve 17 and the exhaust valve 16, and (b) shows the bottom suction hose 14 attached to the water intake port. FIG. 11 is an explanatory view of the device according to the second embodiment. Figure (c) is a partial view of the suction pipe section of the second embodiment device which has been modified in part, and Figure (d) shows the cross-sectional structure of the foot valve.

The following describes an embodiment of the pump of the present invention with reference to Figures 1 to 4.

The first embodiment shown in Figure 1 is an embodiment in which the suction port a of the suction pipe 11 is directly opened, and is made of piping material such as a VP pipe with the upper end of the suction pipe 11 bent horizontally and an exhaust valve 16 and a valve 18 connected to it. A flexible section 12 is provided downstream of the horizontally bent suction pipe 11 to allow the suction pipe 16 to move up and down, and then a water supply pipe facing in a specified direction is installed.

In the following explanation, the piping from the suction pipe 16 onwards will be referred to simply as "hose 13", assuming that it is made of a plastic suction hose, which is commonly used in practical applications.

Each discharge end of the hose 13 shown in the right half of Fig. 1 has a different shape depending on the purpose of use. The hose end 13A is bent into a U-shape at a position lower than the water level b of the water intake tank 31, and a stagnant water area is provided in the hose 13 to seal the water.
The hose end 13B is sealed with a rubber plug 35, but may also be an on-off valve.
The hose end 13C is inserted into the water in the external water tank 32 to seal the end of the hose 13.
Hose end 13D is a piping configuration for pumping water to a level higher than exhaust valve 16, and by providing a check valve 17 at the hose end and discharging it, valve 18 connected to exhaust valve 16 can be closed to pump water upward without leaking.
When pumping upward, the exhaust valve 16 and the valve 18 may be omitted.

The hose end 13E is connected to the suction port of another non-self-priming centrifugal pump or the like for priming, thereby enabling the self-priming centrifugal pump to be primed and started.
Hose end 13F supplies driving water for the siphon unit of patent application no. 2020-194072, which is equipped with a water ejector for priming other large-diameter siphon drainage devices.

The check valve with a spherical valve structure shown in Figure 2 (A) illustrates the internal structure of the exhaust valve 16 and check valve 17 in Figure 1, but check valves with other types of structures can also be used.

The bottom suction hose 14 shown in Figure 2 (b) is connected and extended to the lower end of the suction pipe 11, in order to allow for a gap between the lower end a of the suction pipe 11 and the bottom of the tank 31 for safe use when used in a water tank, etc., and is extended by connecting a flexible rubber hose to suck up water up to the height of the shaking width that cannot be sucked up, making it possible to suck up water from the bottom and to make it easier to suck up and remove sediment that accumulates at the bottom of the tank 31.

The operation of the first embodiment pump as described above involves closing each hose end by its respective means, and opening valve 18, if provided, to vertically vibrate and oscillate the suction pipe to pump water, and closing valve 18 when pumped water jets out of exhaust valve 16 or valve 18 or when siphon drainage begins to reliably continue pumping or siphon drainage.

In the second embodiment, as shown in Figs. 3 and 4, a foot valve 25 is provided at the lower end of the suction pipe 21 to open the suction port, and Fig. 4(c) shows the difference that the bent portion at the upper part of the suction pipe 21 is replaced with a tee joint 24 and the valve connected to the exhaust valve 26 is omitted.
The foot valve 25 shown in FIG. 4(d) is of a spherical valve structure, but the structure of the foot valve is not limited to the spherical valve structure.

The discharge end shape of the hose 13 shown in the right half of Figure 3 is almost the same as that of the right half of Figure 2, but there is no need to store water and seal it before starting the pumping operation. Pumping can be started by performing the same vibration pumping operation as in the first embodiment, and at the discharge end where stored water sealing is required, sealing is performed by the pumping, and siphon drainage can be started.

At the discharge end 13D where water is pumped upward, it is not necessary to install a valve equivalent to the check valve 17 of the first embodiment, but installing one will not cause any problems, and water can be pumped by continuing the vibration.
In the case of hose end 13C, it is possible to start up smoothly by first setting said hose end to the state of hose end 13A and starting siphon drainage, and then moving said hose end to a predetermined position and starting siphon drainage.

Note that valve 18 connected to exhaust valve 16 shown in FIG. 1 and valve 28 connected to exhaust valve 26 shown in FIG. 3 are not essential valves, but are intended to ensure the prevention of air leakage during operation.

As described above, the first and second embodiments are almost identical in terms of pumping and siphoning, however, in terms of usage, the first embodiment pump is suitable for pumping solids, while the second embodiment pump is not suitable for liquids containing solids.
There are also some differences in the principle of pumping. In the first embodiment, pumping is performed under negative pressure inside the piping, while in the second embodiment, pumping is performed by venting at above atmospheric pressure. However, if the foot valve 25 is replaced with a check valve and installed in either the suction pipe or the supply pipe, pumping will be performed under negative pressure below the check valve, resulting in the same configuration as in the first embodiment where a check valve 17 is provided at the discharge end 13D.

The only difference between the two embodiments is the presence or absence of a foot valve. In a practical pump, it is advantageous from the standpoint of manufacture and use to have a pump that can be used for both purposes, and so a pump that can be used for both purposes is used.
In the actual pump to be manufactured, consideration will be given to the corrosiveness and abrasion of the suction end which handles liquid containing solids, the length to match the depth of the water tank, the ease of changing the material, etc., and a certain length of the lower end of suction pipe 21 and suction pipe 11 will be made replaceable to make the pump practical.

The pump of the present invention facilitates the intake of water from reservoirs or upper waterways through dikes or ridges in irrigation applications, and is useful for taking supernatant water from settling tanks and removing sediments in construction wastewater treatment.
In factories and plants, it is convenient for use in dividing and removing various types of aqueous liquids.

When the external non-self-priming centrifugal pump at the hose end 13E is used for priming purposes, the self-priming pumps currently used for irrigation and civil engineering work, which are simple and convenient and have long operating times, can be switched to an efficient non-self-priming general-purpose pump and operated efficiently, resulting in great energy savings and economic benefits.
To facilitate the use of full-scale slurry pumps and sand pumps, improve durability, and increase economy, even in the field of pumps where wear resistance is required.

Hose end 13F supplies driving water for a water ejector used to prime other large-diameter siphon drainage devices, making it possible to completely depower equipment that performs large-diameter siphon drainage and water intake, and making it possible to prevent and remove sediment within a dam, which is a major problem due to abnormal weather, by utilizing the headwaters of the sediment, and contributes to energy savings and economy during long-term operation in disaster prevention drainage of natural dams and reservoirs and for irrigation.

11. Suction pipe (opens directly to suck in water).
12 Hose (of the vibration section).
13 Discharge hose (entire)
13A, 13B, 13C, 13D, 13E, 13F: each hose end of the discharge hose
14 Bottom suction hose
16 Exhaust valve (same structure as check valve).
17 Check valve 171 (check valve) case.
172 (check valve closure) ball.
173 (check valve seat) seat.
21 (with foot valve) suction pipe.
24 Tee (joint).
25 Foot valve.
251 (foot valve) case.
252 (foot valve close) ball.
253 (foot valve seat) seat.
254 (foot valve) strainer 26 exhaust valve 31 (water intake area) water tank 32 external water tank 33 siphon unit (equipment equipped with a water ejector for large-diameter siphon drainage)
34 (External) non-self-priming pump a Suction end b Suction area water surface

Claims (5)

In a pump device that performs water pumping or siphon drainage, the lower end of the suction pipe is submerged in the water in the suction area, and if the water supply pipe that is connected to the upper end of the suction pipe and extends is a high-rise pipe such as a mountain piping, an exhaust valve is provided near the top of the pipe, and the suction pipe that is submerged in the water in the suction area is vibrated vertically to perform water pumping or siphon drainage. A pump device for pumping or siphoning water as claimed in claim 1, in which a joint is provided midway through the suction pipe, making it possible to replace a certain length of the lower end of the suction pipe. A pumping or siphon drainage device according to claim 1 or claim 2, in which the suction pipe is vibrated vertically by a manual or powered drive means such as a lever, crank mechanism, or air cylinder. A pumping device according to any one of claims 1, 2, and 3, in which the discharge end of a water supply pipe is connected and communicated with the suction port of another non-self-priming centrifugal pump to prime the non-self-priming centrifugal pump and enable pumping operation. 4. A pump device for siphon drainage according to claim 1, 2 or 3, wherein the discharge end of the water supply pipe is connected and communicated with an external water ejector to obtain a vacuum source.