JP6216306B2 - Switching device for pumping and pouring water in wells - Google Patents

Description

The present invention relates to switching apparatus pumping and injection in wells.

   Therefore, when the conventional technologies in the field are investigated, it has been found that the following four cases exist.

Japanese Utility Model Publication No. 62-200754 JP-A-4-128413 JP-A-8-13463 JP-A-8-3118519

   Among these, the known techniques 2 and 3 are not particularly related to the present invention, so the known techniques 1 and 4 were compared and examined.

   Then, although the purpose of performing the backwashing by pumping up and pouring water with one well pipe is the same in the known art 4, since it emphasizes backwashing for a plurality of aquifers, However, the known technique 1 belongs to the applicant according to the present invention, and even though the object of the invention is the same, the structure is complicated and thus not implemented.

   The present invention is a technique obtained by progressively improving this known technique, and the former structure has been changed from a two-dimensional operation, which had to be a complicated structure, to a three-dimensional operation. By using a pipe that penetrates a space through which water passes in the vertical direction between the pipes as a bypass, the apparatus has a relatively simple structure.

   An object of the present invention is to provide an apparatus having a valve that automatically switches the reverse water flow so that the reverse water flow does not pass through the pump, because a reverse flow of a normal pumping pipe for the purpose of reduction adversely affects the pump motor. And

   Since the screen of the water well proceeds in the direction of physical blockage due to the biological sand due to bacteria with the use time, when the specific spring rate decreases, chemical and physical renovation work is carried out to restore the specific spring rate. This renovation work for well cleaning is performed about once every few years and not frequently.

That is, based on many years of experience, the concept of frequent backwashing work for groundwater well screens is not common, and it is extremely effective to remove clogging substances in a short time. It is necessary not to allow time for the organisms to attach and act and breed .

   Also, depending on the use of the well, for example, if screen backwashing once a day is performed by automatic operation (sequence control) during the nighttime break, a dramatic effect can be expected in maintaining the function of the screen. It can be said that the idea is not bound by past stereotypes.

   As a water source for backwashing, when a plurality of wells are pumped in parallel, securing them is simple and reliable.

   In the case of a single well, a tank for backwashing can be installed and the backwashing action can be repeated as many times as necessary.

   When using a pumping pipe without using a dedicated pipe for backwashing, the switching valve device for reducing water according to the present invention is optimal, thereby avoiding adverse effects on the submersible pump section. can do.

   Also, how much momentum of backwashing is required, but according to published research materials, it is recommended that the backwashing flow rate is more than twice the forward flow rate, and the screen is clogged. It can be understood sensuously that the soil particles can be pushed back by a double backflow, and the direction in which the internal pressure is applied is the direction in which the screen spreads, so that the clogging is also easily removed.

Considering specific numerical values, if the well is pumped at 300 (L / min) at normal times, it may be backflowed at 600 (L / min). This is a calculation in which 1.0 (m ³ ) flows backward in 100 seconds. If the casing is φ300, the amount of water of 1.0 (m ³ ) will push up the water level in the casing by 14 m, and this water head should have a maximum flow rate of 600 (L / min). become. Although it depends on the loss (resistance) of the screen, it seems to be realistic.

   Therefore, such a concept can be applied to all water wells, but it is considered to be a good idea to make a test by adopting it in a snowmelt well where water quality is unlikely to be a problem.

The present invention provides a switching valve between a submersible pump section and a pumping pipe communicating with the submersible pump section inside a casing of a well, and a lower pipe section communicating with the submersible pump section in an outer tube body of the switching valve installation section. wherein the upper tube portion leading to lifting pipe provided in the lower side right and left side portions of the inner tube communicating with said lower pipe portion and the upper pipe portion provided Mizuguchi unit-passing, the outer tube body and the inner tube and the central portion left and right side portions of the inner tube leading between the body provided Mizuguchi portion upper through, providing the inner water inlet provided in the upper portion right and left side portions of the inner tube on the left and right side portions of the outer tubular body as leading to outsource Mizuguchi, a partition wall between said upper through water outlet portion and the inner injection port is provided in the inner tube member, and pumped by the vertical operation of the switching valve which definitive under side of the inner tube body formed in such It is a device that performs both water injection (reduction) operations within a single well .

In order to maintain the function of the reduction well, it is possible to provide a relatively simple device for switching between pumping and pouring water frequently performed .

   In a normal water well, clogging of the screen is a serious problem, and the backwashing operation can be performed easily and quickly by installing a switching valve.

When the switching valve used in the inner tube of this device is a spherical body, if the valve seat is also a spherical surface with the same curvature as the spherical body, the spherical valve will adhere to the valve seat no matter how it rotates. As a result, the shaft rod is not required as in the case of the disc type switching valve.

Structure diagram of the whole well (A) Front sectional view at the time of pumping of the disc-shaped switching valve portion, (B) AA sectional plan view of FIG. 2 (A) (C) Side cross-sectional view of disc-shaped switching valve section during water injection, (D) CC cross-sectional plan view of FIG. (E) Front sectional view during pumping of spherical switching valve, (F) Plan sectional view taken along line EE in FIG. 4 (E) (G) Side sectional view of the spherical switching valve section during water injection, (H) GG line plane sectional view of FIG. 5 (G)

  In the present invention, since the casing divided into the pumping pipe and the water injection pipe is not provided, the screen can be easily backwashed in a normal well because it can be used in one casing. To be able to do it.

  If the normal pumping pipe is made to flow backward for the purpose of reduction, the submersible pump section is adversely affected, and the water flow is automatically switched so as not to pass through the submersible pump section.

  When pumping up and pumping up, the switching valve ascends inside the inner tube by discharge pressure, enters the inside of the outer tube from the lower water inlet of the lower part, rises back to the pump. (See Figures 2 and 4)

  On the contrary, the switching valve descends at the time of water injection and does not flow to the submersible pump part but goes out through the inside of the casing. (See Figures 3 and 5)

  In the spherical switching valve, it is possible to maintain a close contact state with the valve seat no matter how the inner tube is rotated. (See Fig. 4 (E) and Fig. 5 (G))

  The depth of the well shown in the drawing is an example of 150 m, and the diameter of the well is 250A.

  Reference numeral 1 denotes a casing. Inside the casing, switching valves 4 and 16 described later are installed between the submersible pump unit 2 according to the present invention and the pumping pipe 3 communicating therewith.

  2 and 3 show an embodiment in which a disc-shaped switching valve 4 is installed.

  4 and 5 show an embodiment in which a spherical switching valve 16 is installed.

  2 and 3, reference numeral 4 denotes a disk-type switching valve provided so as to be adjusted up and down via a shaft rod 14 at the lower side portion of the inner tubular body 8 to be described later, with the bottom surface thereof. By switching the valve to the vertical position, switching between pumping and pouring water is performed in one casing. The operation of this disk-shaped switching valve is as described above.

  Reference numeral 5 denotes an outer tube body in a front view (FIG. 2 (A)) of the disk-shaped switching valve 4 portion. A lower tube portion 6 communicating with the submersible pump portion 2 is provided on the bottom surface portion of the outer tube body. An upper pipe portion 7 that communicates with the pumping pipe 3 is provided on the flat portion of the pipe body.

   Reference numeral 8 denotes an inner tube having the same diameter as that of the lower tube 6 and the upper tube 7 provided at the central portion in the outer tube 5, and is a front view of the lower side of the inner tube (FIG. 2A). ) Are provided on the left and right side portions of the inner pipe body, and the lower water passage portions 9 and 9 are provided between the outer tube body 5 and the inner tube body 8 on the left and right sides of the upper side of the inner tube body. It leads to the upper water flow opening 10 and 10 to provide. The inner tube 8 has an integral tube structure from the lower tube portion 6 to the upper tube portion 7.

  Reference numerals 11 and 11 denote internal water injection ports provided on the left and right sides of the central portion of the inner tube 8 in plan view (FIG. 2B), and the internal water injection ports are provided on the left and right sides of the outer tube 5. 12 and 12 are communicated.

  Reference numeral 13 denotes a partition provided between the upper water inlets 10 and 10 and the inner water inlets 11 and 11 in the inner tube 8, and the inner space 17 of the inner tube 8 is formed by the partition.

  15, 15, 15, 15 are valve seats provided in the upper and lower working chambers of the disc-shaped switching valve 4 in the inner space portion 17 of the inner tubular body 8, and the disc-shaped switching valve is within the interval range of the upper and lower valve seats. Operates vertically.

  Reference numeral 16 denotes a spherical switching valve that replaces the disk-shaped switching valve 4, and this spherical switching valve is adjusted by switching to the upper and lower valve seats 15, 15, 15, 15 in the inner space 17 of the inner tubular body 8. The operation of switching between pumping and water injection in the casing is the same as in the case of the disk-shaped switching valve 4.

  The state of the spherical switching valve 16 during pumping is shown in FIGS. 4 (E) and (F), and the state during water injection is shown in FIGS. 5 (G) and (H). is there.

DESCRIPTION OF SYMBOLS 1 Casing 2 Submersible pump part 21 Pump 22 Strainer 23 Submersible motor 3 Pumping pipe 4 Disc type switching valve 5 Outer pipe body 6 Lower pipe part 7 Upper pipe part 8 Inner pipe body 9,9 Lower water inlet part 10,10 Upper water inlet Portions 11, 11 Internal water inlet 12, 12 External water inlet 13 Bulkhead 14 Shaft rod 15, 15, 15, 15 Valve seat 16 Spherical switching valve 17 Inner space of inner tube

Claims (2)

Inside the casing of the well, a switching valve is installed between the submersible pump section and the pumping pipe communicating with the submersible pump section, and a lower pipe section communicating with the submersible pump section and the pumping pipe are provided on the outer tube body of the switching valve installation section. the upper pipe portion provided leading to, the lower portion right and left side portions of the inner tube communicating with said lower pipe portion and the upper pipe portion provided Mizuguchi unit-passing, between the outer tube body and the inner tube the Mizuguchi portion upper through the central portion right and left side portions of the inner tube is provided leading to, communicating the inner water inlet provided in the upper portion right and left side portions of the inner tube body outsourced Mizuguchi provided on right and left side portions of the outer tubular body and thus, the upper through water outlet portion of the partition wall between the inner injection port is provided with both working water injection and pumped by the vertical operation of the switching valve which definitive under side of the inner tube body formed in this way within said tubular body A pumping device for pumping and pouring water in a well, wherein the water is pumped in one well pipe . 2. The switching device for pumping and pouring water in a well according to claim 1, wherein the switching valve installed between the submersible pump section and the pumping pipe communicating with the submersible pump inside the casing has a spherical shape.

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