JP2019085913A - Submersible pump support device, submersible pump support system and underground pumping method using them - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a submersible pump support device having a simple structure without being bulky by removing obstacles of turbid water containing fibers and the like. A submersible pump support device (90) that supports the function of a vertical submersible pump (10) that drains or pumps turbid water (2) containing a fibrous substance (1), and is an upper edge (21). ) Is formed with an opening (22) so that the submersible pump (10) can be easily taken in and out. And a raising table (30) that defines the posture, and the side surface (23) of the bottomed container (20) is opened to a height (UL) within a predetermined range from the outer bottom surface or the inner bottom surface (28). Then, a suction window (25) capable of flowing turbid water (2) is opened, a net (40) is spread without a gap on at least the opening surface of the suction window (25), and the opening of the net (40) is fibrous. It is a size that blocks the passage of the substance (1). [Selection diagram] Fig. 1

Description

  The present invention relates to a submersible pump support tool, a submersible pump support system and a downhole lifting and draining method using them, and more particularly, a submersible pump supporting tool for facilitating drainage in an environment handling turbid water containing fiber etc. , Submersible pump support system and method for underground pumping and drainage using them.

Underground drainage
In underground work such as metal mining, unnecessary water (post-work water) is generated along with excavation work. In addition, there is a possibility that underground water may spring up (underground spring), and after this operation, wastewater including underground water and underground spring is discharged from the inside of the mine to the outside using a submersible pump. Thus, there is a demand for a technique for suppressing the clogging of the drainage pipe when the wastewater generated in the underground operation is drained using a submersible pump.

  For drilling work, drilling of holes for filling with blasting glaze, drilling of grout holes for suppressing flooding, drilling of boring holes for confirming geology, etc. are diverse in size and depth, etc. But in any case, it is excavated while supplying water. Further, immediately after the grouting hole is excavated, it is flushed with flushing water in order to remove unnecessary sand and mud remaining in the hole before filling the hole with cement milk for water blocking and the like.

  The water after drilling and after flushing (water after work) and underground spring water are discharged to the underground floor surface from the cracks of the hole or the tunnel wall and the like. If the drilling direction is above the horizontal or horizontal direction, there is no significant impact on the digging work, but if the drilling direction is below the horizontal direction, the water after working on the floor surface of the tunnel tip Also, because underground spring water is accumulated to form a puddle, it is difficult to excavate the submerged part.

  In the water reservoir thus formed, not only the water phase but also the above-described sand gourd or mud as a solid phase component is contained in a thick slurry state. A submersible pump having the ability to transfer the above-mentioned solid phase component is used to remove the puddle to expose the well surface and to make it suitable for the drilling operation.

<Minor tunnel inner wall>
If the inner wall of the tunnel is left after digging, floating stones and gravels will fall, so wall protection is provided. However, the wall surface protection of the inner wall of a tunnel in a metal mine is performed by a simple method described later. The first reason is that, unlike a tunnel of a motorway which is maintained semipermanently, it is not necessary to maintain it when the commercial mine life ends and the mountain is closed. The second reason is that various types of vehicles do not pass, and only special vehicles for mining work pass.

  For the first and second reasons described above, reinforcing fibers (hereinafter also referred to as "fibrous substances") are sprayed together with a wall protective material such as concrete for the purpose of protecting the inner wall of a tunnel in a metal mine. As the reinforcing fiber, for example, one referred to as "CH fiber" under the trade name of CMC Co., Ltd. is applied. The CH fiber is a fibrous material made of water-resistant polypropylene, and preferably has a cylindrical outer diameter of about 0.72 mm and a length of about 35 mm.

<Drainage work>
The drainage operation in the mine operates by placing a submersible pump near the bottom of the puddle, and draining the turbid water of the puddle that has been sucked from the suction port into the pumping water or the outside with a discharge pipe (hereinafter also referred to as "pumping drainage") Do. Alternatively, it may be pumped and transported to a location closer to the outside of the tunnel than the tip of the tunnel. Puddles are not only generated on the floor of the tunnel tip.

<Problems>
The submersible pump used is capable of transferring a liquid containing a thick slurry as described above. However, at the end of the tunnel, fibrous materials that bounce back from the tunnel wall at the time of spraying are scattered on the roadbed. After work, this fibrous material may be flushed into the water or underground spring water and may flow into the puddle. When it is attempted to lift and drain such water turbid, there is a first problem that the suction port of the submersible pump is blocked by the fibrous material and the slurry and drainage can not be performed.

  Moreover, even if it does not reach the 1st problem that a suction port obstruct | occludes, there exists a 2nd trouble that the downstream piping is obstruct | occluded by the massive substance which a fibrous substance and a slurry knead | mix and are formed. In addition to the loss of the operation rate reduction for the usual underground work due to these first and second defects, the burden of labor and time for restoration to the situation where the usual underground work is hindered There is a problem in that

<Known example>
In connection with drainage work, for example, Patent Document 1 describes a technique for providing a check valve and preventing backflow of mud water to a high-lift pump. In addition, Patent Document 2 describes a technology for suppressing adhesion of solid precipitates such as clay and wood pieces around a net gauze with a mesh net covering the periphery of a suction port and a rotary blade having a portion disposed inside. It is done.

Japanese Patent Application Laid-Open No. 09-291894 Japanese Patent Application Laid-Open No. 2005-060393

  However, in any of the techniques disclosed in Patent Document 1 and Patent Document 2, another device (check valve, mesh rod and rotary blade) different from the pump portion is attached to secure the installation place of the device. Since it is necessary, it is not always simple and there is a problem that application to a narrow well is difficult. The present invention has been made in view of such problems, and the object of the present invention is to remove obstacles to pumping and draining in an environment that handles turbid water containing fibers etc. An object of the present invention is to provide a submersible pump support device that supports the function of a pump. In addition, it is another object of the present invention to provide a method capable of suppressing the clogging of a drain pipe without requiring a very large installation place other than the installation place of the submersible pump in some embodiments.

  The present inventors have completed the present invention by finding that clogging of a drainage pipe can be prevented by suppressing that a reinforcing fiber is sucked into a submersible pump.

[1] The present invention was made to achieve such an object, and one aspect of the present invention is a vertical submersible pump (not shown) for draining or pumping turbid water (2) containing a fibrous substance (1) A submersible pump support tool (90) for supporting the function of 10),
An opening (22) is formed in the upper edge (21) so that the submersible pump (10) can be easily put in and out, and a bottomed container (20) having a shape easily
A lift table (30) for defining the storage position and posture of the submersible pump (10) housed inside the bottomed container (20);
Equipped with
The side surface (23) of the bottomed container (20) can be opened to a predetermined range of height (U to L) from the outer bottom surface (24) or the inner bottom surface (28) to allow the turbid water (2) to flow The suction window (25) opens,
The net (40) is expanded without gaps on at least the opening surface of the suction window (25),
The opening of the net (40) is set to a size that prevents passage of the fibrous material (1).

[2] Also, in another aspect of the present invention, the height (H) of the upper edge (21) is higher than the depth (D) of the turbid water (2) to be drained or pumped up,
The lifting table (30) is
Between the inner bottom surface (28) of the bottomed container (20) and the bottom surface (11) of the submersible pump (10), a predetermined bottom raising height (G) is set,
The bottom raising height (G) is set at a position lower than the height (H) of the upper edge (21).

[3] In the other aspect of the present invention, the bottomed container (20) is formed by drilling the suction window (25) in a bucket,
The raising table (30) is constructed by bundling pipes cut into lengths corresponding to the raising height (G),
The net (40) is formed of a polyethylene net.

[4] Further, in another embodiment of the present invention, the fibrous material (1) is a fiber sprayed on the inner wall of a tunnel together with a wall protective material for reinforcement.

[5] Another aspect of the present invention is a submersible pump support system (100) using the submersible pump support device (90) according to any one of the above [1] to [4],
With the submersible pump support device (90) containing the submersible pump (10) installed in the puddle (3),
A pump drive control unit (60) for controlling the drive and stop of the submersible pump (10);
The depth signal (D) is detected by juxtaposing to the water reservoir (3), and when it reaches the preset first depth (D1) and second depth (D2), the depth signal corresponding to each case Depth detection means (50) for emitting (S);
Equipped with
The first depth (D1) is set between the height (H) of the upper edge (21) and the height (U) of the upper side (26) of the suction window (25),
The second depth D2 is set between the height U of the upper side 26 of the suction window 25 and the height L of the lower side 27.
The pump drive control unit (60) controls the upper edge (21) while the water depth (D) of the water pool (3) is rising, based on the depth signal (S) emitted by the depth detection means (50). Above the first depth (D1) before reaching the upper end), the power of the submersible pump (10) is increased, and conversely, the lower part in the bottomed container (20) is lowered while the water depth (D) is decreasing. The output of the submersible pump (10) is reduced when it falls below the second depth (D2) before becoming lower than the height of the inlet (12) of the submersible pump (10).

[6] Further, in another aspect of the present invention, the pump drive control unit (60) is configured to control the depth of the water pool (3) based on a depth signal (S) emitted by the depth detection means (50). When the first depth (D1) is exceeded while (D) is rising, the submersible pump (10) is operated, and conversely, the water depth (D) falls below the second depth (D2) while falling And a submersible pump support system (100) for stopping the submersible pump (10).

[7] In addition, another aspect of the present invention relates to a fibrous substance (1) from a water pool (3) in a well using the submersible pump support device (90) according to any one of the above [1] to [4]. A downhole pumping and draining method for draining or pumping turbid water (2) containing
With the submersible pump (10) housed in the submersible pump support device (90),
While installing the submersible pump support tool (90) in the puddle (3),
When the water depth (D) of the water reservoir (3) is detected, and the preset first depth (D1) and second depth (D2) are reached, the depth signal (S) corresponding to each case is detected. Side by side with depth detection means (50)
The first depth (D1) is set between the height (H) of the upper edge (21) and the height (U) of the upper side (26) of the suction window (25),
The second depth D2 is set between the height U of the upper side 26 of the suction window 25 and the height L of the lower side 27.
The first depth before reaching the upper edge (21) while the water depth (D) of the water pool (3) is rising based on the depth signal (S) emitted by the depth detection means (50) When (D1) is exceeded, the output of the submersible pump (10) is increased, and conversely, while the water depth (D) is decreasing, the suction port (10) of the submersible pump (10) in the bottomed container (20) It is a downhole pumping and drainage method in which the power of the submersible pump (10) is reduced when it falls below the second depth (D2) before becoming lower than the height of 12).

[8] Another aspect of the present invention is that the submersible pump (10) is operated when the water depth (D) of the water pool (3) exceeds the first depth (D1) while rising, and vice versa The submersible pumping method may stop the submersible pump (10) if the water depth (D) falls below the second depth (D2) during descent.

  ADVANTAGE OF THE INVENTION According to this invention, in order to remove the disorder | damage | failure with respect to the drainage and pumping in the environment which handles the turbid water containing a fiber etc., the submersible pump assistance instrument which assists the function of a submersible pump by bulky simple structure can be provided. In addition, depending on the embodiment, it is possible to provide a method capable of suppressing the blockage of the drainage pipe without requiring a very large installation place other than the installation place of the submersible pump.

It is a figure explaining the usage form of the submersible pump assistance instrument (Hereafter, it is also called "this instrument") which concerns on one Embodiment of this invention, and FIG. FIG. 1 (B) is a perspective view showing a state where this device is not used. It is a figure for demonstrating the structure of this instrument shown to FIG. 1 (A), FIG. 2 (A) is the front view partially transparent, and FIG. 2 (B) is a top view. It is a front view for demonstrating the external appearance of this instrument shown to FIG. 1 (A) and FIG. A partial cross-sectional view for explaining an underwater pump support system (hereinafter, also referred to as "the present system") according to an embodiment of the present invention, and a downhole pumping and drainage method (hereinafter, also referred to as "the present method") using the same It is a front view by.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. Note that the present embodiment described below does not unduly limit the contents of the present invention described in the claims, and all of the configurations described in the present embodiment are essential as means for solving the present invention. Not necessarily. In addition, throughout the drawings, the same effect members and places are denoted by the same reference numerals even if there is a slight difference in the outer shape, and the description will not be repeated.

  FIG. 1 is a view for explaining the usage form of this device, and FIG. 1 (A) is a partially transparent perspective view showing the state where this device is used, and FIG. 1 (B) is a state without using this device It is a perspective view shown. The water reservoir 3 of the water depth D (hereinafter, also referred to as “depth” or “liquid level”) D shown in FIG. 1 is, for example, the deepest part in a downhole excavated in a downward slope, ie It is necessary to drain or pump water with the submersible pump 10.

  At that time, in addition to the solid sediment 4 such as gravel and mud, the fibrous substance 1 contained in the turbid water 2 is sucked into the suction port 12 of the submersible pump 10 and is further sucked, a flow leading to the submersible pump 10 It is the cause of the trouble which obstructs the way. In order to eliminate the problem shown in FIG. 1 (B), the present device 90 shown in FIG. 1 (A) is used. The application object of the present invention is a puddle 3 in a well. The fibrous material 1 is a fiber sprayed with a wall protective material such as cement on the inner wall of a well in the well as reinforcement.

<Cause of Occlusion>
The cause of the above-mentioned failure of closing the suction port 12, the discharge port 13 and the drainage pipe 14 of the submersible pump 10 is the reinforcing fiber (fibrous substance) 1 contained in the turbid water 2 and solid phase components such as gravel and mud. Is confirmed to be a lump formed by being entangled. Specifically, since the reinforcing fiber 1 has a small specific gravity and floats in the water pool 3, it is considered that the reinforcing fiber 1 is difficult to be sucked into the suction port 12 of the submersible pump 10 near the water bottom.

  However, in practice, it was found that the reinforcing fiber 1 was entangled in a lump that blocked the suction port 12 and the drain pipe 14. That is, as shown in FIG. 1 (B), even with the reinforcing fiber 1 floating near the water surface due to the material having a small specific gravity, as shown in FIG. 1 (B), the suction port 12 located below the submersible pump 10 is It was confirmed that the water was sunk close to the bottom of the water and sucked close to the suction port 12 by the downward suction flow.

  In addition, with regard to the timing of being sucked into the submersible pump 10, it was hypothesized that the reinforcing fiber 1 was also almost simultaneous with gravel and mud, which was the cause of the formation of lumps, and the hypothesis was verified. As a result, the following was found. First, although the reinforcing fiber 1 is suspended in the water reservoir 3, when the submersible pump 10 starts operation, the turbid water 2 of the water reservoir 3 is folded up on the water surface in the vicinity where the submersible pump 10 is installed. Be accumulated.

  Next, while the submersible pump 10 is in operation, the liquid level D of the water reservoir 3 is lowered, and a part of the reinforcing fiber 1 approaches and is drawn into the suction port 12 located below the submersible pump 10. At this time, solid precipitates 4 (hereinafter, also referred to as “solid precipitates”) such as gravel and mud precipitated at the bottom of the water reservoir 3 are sucked simultaneously, and the solid precipitates 4 are mixed with the reinforcing fiber 1 It becomes a state and forms a massive substance. As a result, it was confirmed that the inside of the drain pipe 14 was easily blocked. This phenomenon will be described in more detail.

  Generally, the submersible pump 10 is stopped when the fluid level D decreases to the vicinity of the suction port 12 due to the slippage prevention safety function. As described above, immediately before the submersible pump 10 is idled and stopped, the floating reinforcing fibers 1 approach the suction port 12 and a part of them is sucked. After that, while the pump is stopped for a while, the liquid level D of the water reservoir 3 rises due to the discharge or the inflow from the surroundings. Then, the submersible pump 10 is restarted since the idling prevention function is released. At the timing of this restart, the solid precipitate 4 near the bottom of the water reservoir 3 is sucked into the suction port 12.

  A series of such phenomena is repeated. That is, the submersible pump 10 repeats the stop by the idling prevention function, the re-operation by the release thereof, and the short time of the temporary stop. As a result, the solid precipitate 4 and the reinforcing fiber 1 are mixed in the flow path to form a massive substance. The reinforcing fiber 1 and the solid precipitate 4 forming this massive substance are sent to the drain 14 almost simultaneously. During the process or as a result, it was confirmed that the massive substance was in a state of being easily entangled in the flow path to the drain pipe 14.

Submersible pump
The submersible pump 10 is a vertical (vertical) type and is placed on the bottom of the water with the rotation axis of the motor in the vertical direction, the suction port 12 is disposed below the main body, and in principle the suction port 12 is submerged What is pumped in is used. In addition, even if the motor rotation shaft is used in the horizontal direction, the suction port 12 is disposed below the main body that can stand on its own, and if the suction port 12 is submerged and placed in a floating state, the water is pumped. , Here also it can be used as vertical. As an example, Tsurumi Seisakusho, model number KTV2-22 is suitable.

  The embodiment shown in FIG. 1 (A) is applied to the drainage operation for the water pool 3 in the well, and the submersible pump 10 is housed and used in the device 90. Further, in the comparative example shown in FIG. 1 (B), the submersible pump 10 was installed directly in the water reservoir 3 and used. In the embodiment, the net 40 covered on the side surface or outer peripheral surface (hereinafter simply referred to as "the outer peripheral surface") 23 of the submersible pump support tool is made of polyethylene and has an opening of 1 x 1 mm and a wire diameter of about 0.21 mm. is there. In addition, as shown in FIG. 1, the condition of the shallow water reservoir 3 is a depth D which is not submerged in the upper part of the submersible pump 10 and solidifies at the bottom of the turbid water (muddy water / slurry) 2 containing the fibrous substance 1 Precipitate 4 is deposited.

  FIG. 2 is a view for explaining the structure of the present instrument shown in FIG. 1 (A), FIG. 2 (A) is a partially transparent front view, and FIG. 2 (B) is a plan view. The device 90 is configured to include a bottomed container 20, a lifting platform 30, and a net 40. The bottomed container 20 is a container in which the opening 22 is formed in the upper edge 21 and the submersible pump 10 can be easily put in and out, and a poly bucket is preferable as an example of the material. The height H of the upper edge 21 is set to be higher than the depth D of the turbid water 2 to be drained or pumped up. That is, the bottomed container 20 of the device 90 is preferably a bucket-shaped container having a height H which is not submerged in the water depth D of the water reservoir 3 and which is easy to process.

  The lifting table 30 defines the storage position and posture of the submersible pump 10 housed inside the bottomed container 20, and between the inner bottom surface 28 of the bottomed container 20 and the bottom surface 11 of the submersible pump 10. It functions as an intervening spacer. The lifting table 30 is, for example, a substantially circular table-like shape by bundling a polypipe (hereinafter, simply referred to as "pipe") 31 into lengths G (bottom lifting height) G desired to be lifted. What was formed into is used.

  The net 40 is configured such that the net 40 having a larger area than the entire outer peripheral surface of the bottomed container 20 wraps around and covers the entire outer peripheral surface 23 of the bottomed container 20. In FIG. 1 (A), the internal configuration of the instrument 90 is merely seen through as if a part of the front was cut and removed for the purpose of explanation. Further, in FIG. 2A, the net 40 is omitted. In addition, the suction window 25 said to the following is pierced and formed in the outer peripheral surface 23 of bottomed containers 20, such as a bucket.

  A rectangular suction window 25 is opened on the outer peripheral surface 23 of the bottomed container 20 so as to have a predetermined range of heights U to L from the outer bottom surface 24 or the inner bottom surface 28 and into which the turbid water 2 can flow. In addition, the height of the suction window 25 relative to the height H of the upper edge 21 of the bottomed container 20, that is, the relationship between the height U of the upper side 26 and the height L of the lower side 27 of the suction window 25; The relationship between the bottom elevation height G and the relationship between the first depth D1 and the second depth D2 for specifying the water depth D of the water reservoir 3 will be described later with reference to FIG. In addition, although the bottomed container 20 has a thickness of several mm in each of the members forming the bottom plate portion and the side plate portion, the thickness is simply drawn as 0 mm throughout the drawings.

  It is sufficient if the net 40 is stretched without gaps at least on the entire surface of the suction window 25 as described later with reference to FIG. Alternatively, as described above with reference to FIG. 1A, the wide-area net 40 may be configured to cover and cover the entire outer peripheral surface 23 of the bottomed container 20. The opening 1 × 1 mm of the net 40 is a size that prevents the fibrous substance 1 from passing through.

  As shown in FIG. 2 (B) when the tool 90 is viewed in plan from above, the lifting table 30 is reduced in diameter to such an extent that there is a gap to some extent with respect to the outer diameter of the inner peripheral surface of the bottom of the bottomed container 20 Within the range of the outside diameter, it is formed in a substantially circular table shape. The lifting table 30 is concentrically positioned and placed at the center of the bottom of the bottomed container 20, but it does not have to be positioned at the center of the bottom as concentrically.

  Furthermore, it is not necessary for the submersible pump to be in contact with the bottom surface 11 of the submersible pump 10 and be able to stably mount the submersible pump 10 without leaving the storage space 33 in the lower part. For example, the shape is not particularly limited. In the case of the present device 90, the storage space 33 is formed in the vicinity of the circumferential surface of the polypipe 31 which constitutes the raising table 30.

  FIG. 3 is a front view for explaining the appearance of the device shown in FIG. 1 (A) and FIG. The net 40 of the suction window 25 opened on the outer periphery of the bottomed container 20 shown in FIGS. 1A, 2A, and 3 is expanded without a gap to form a filtration filter. However, the net 40 is omitted in FIG. 2 (A). This filtration filter has an effect and effect of supporting the smooth operation of the submersible pump 10 by filtering and flowing in to the suspended solid 2 including the wound solid precipitate 4 and the attracted fibrous material 1 to some extent. In particular, there is an effect of excluding the fibrous substance 1 which is a main cause of the formation of a lump to suppress the damage caused in the flow path. In order to obtain this effect, it is preferable to set as follows.

  As shown in FIG. 2A, the upper side 26 of the suction window 25 is set at a height U which is about 30% lower than the height H of the upper edge 21 of the bottomed container 20. The lower side 27 of the suction window 25 is set to a height L which is about 40% lower than the height U of the upper side 26. The bottom raising height G is set to a height G which is about 5% lower than the height L of the lower side 27. The bottom raising height G is set at a position much lower than the height H of the upper edge 21 so that the submersible pump 10 can be stored in the device 90.

  The relationship between the first depth D1 and the second depth D2 for specifying the water depth D of the water reservoir 3 together with these is as follows. That is, the first depth D 1 is set between the height H of the upper edge 21 and the height U of the upper side 26 of the suction window 25. The second depth D2 is set between the height U of the upper side 26 of the suction window 25 and the height L of the lower side 27. The critical significance of the first depth D1 and the second depth D2 will be described later with reference to FIG.

  FIG. 4 is a front view, partly in section, for explaining the submersible pump support system (the present system) according to an embodiment of the present invention, and the underground lifting and drainage method (the present method) using the same. As shown in FIG. 4, the present system 100 includes the submersible pump 10, the present instrument 90, a depth detection unit (hereinafter also referred to as a “level meter”) 50, and a pump drive control unit 60. It is done.

  The submersible pump 10 is placed near the bottom of the water reservoir 3 and drains or lifts the turbid water 2 collected in the water reservoir 3. The device 90 is used in combination with the submersible pump 10, and is installed in the water reservoir 3 together with the device 90 in a state where the submersible pump 10 is stored. The device 90 functions to prevent the submersible pump 10 from sucking the fibrous substance 1 contained in the turbid water 2 and a certain amount of solid phase components.

  The depth detection means 50 is provided adjacent to the submersible pump 10 in the water reservoir 3, detects the water depth D, and emits a depth signal S in accordance with the detected depth D. The pump drive control unit 60 controls the drive and stop of the submersible pump 10 in accordance with the depth signal S generated by the depth detection means 50. The depth detection means 50 includes an electrode rod (not shown) capable of detecting the liquid level D of the water reservoir 3. The depth detection means 50 detects the depth D of the water reservoir 3, and when reaching the preset first depth D1 and second depth D2, emits depth signals according to the respective cases.

  The pump drive control unit 60 combines the depth detection means 50 and operates the submersible pump 3 when the liquid level D becomes equal to or more than a predetermined depth (first depth D1), and further, the predetermined depth (Second depth D2) Control is made to stop when it is below. Thereby, the idle rotation of the submersible pump 3 is prevented, and unmanned operation is enabled. The control output of pump drive control unit 60 is not simply controlled ON / OFF based only on current depth signal S, and is also turned ON / OFF while referring to the history of the situation before current depth D. Control the

  The pump drive control unit 60 operates or stops the submersible pump 10 based on the depth signal generated by the depth detection unit 50. That is, the pump drive control unit 60 operates the submersible pump 10 when the liquid level D of the turbid water 2 in the water reservoir 3 is rising and exceeds the first depth D1 before reaching the upper edge 21. Conversely, if the depth D of the water reservoir 3 falls below the second depth D2 before the depth D of the water reservoir 3 becomes lower than the height of the suction port 12 of the submerged pump 10 in the bottomed container 20, the pump drive control unit 60 Stop it.

  When the pump drive control unit 60 performs ON-OFF control based on the result of comparing the present value with the threshold, the threshold is provided with a predetermined width, and the pump drive control unit 60 is turned ON unless the threshold is higher by a predetermined width than the OFF threshold This is a general control method that does not turn on, unless it falls to a threshold lower than the turned-on threshold by a predetermined width after turning on. If the threshold for determining ON-OFF switching is not provided with a predetermined width based on the history, avoid the adverse effect of repeating ON-OFF frequently each time a single threshold is crossed when the current value changes. It is for.

  The submersible pump 10 used in the present apparatus 90, the present system 100, or the present method has a pumping capacity exceeding the amount of increase of the water reservoir 3, so the liquid level D of the water reservoir 3 is constant while it is in operation. descend. Then, before the liquid level D becomes lower than the suction port 12 of the submersible pump 10, the pump drive control unit 60 stops the submersible pump 10. If the difference between the pumping capacity of the submersible pump 10 and the amount of water buildup in the water reservoir 3 is small, the frequency of the submersible pump 10 repeating ON-OFF is small, but conversely, if the difference between both is large, the ON-OFF The frequency of repetition is high, which is not preferable for the operation of the machine.

  In this regard, a combination of the pump drive control unit 60, the depth detection means 50, and the submersible pump 3 may be modified to improve usability. That is, as described above, instead of performing the on / off control based on the result of comparing the current value with the threshold value, the pump drive control unit 60 performs control so that the output can be adjusted between on and off. Also good. In that case, the output is raised at that timing instead of ON, and the output is reduced at that timing instead of OFF.

  That is, based on the depth signal S emitted by the depth detection means 50, the pump drive control unit 60 sets the water in the water if it exceeds the first depth D1 before reaching the upper edge 21 while the water depth D of the puddle 3 is rising. The pump 10 is powered up, and conversely, the submersible pump 10 is output when the water depth D falls below the second depth D2 before becoming lower than the height of the suction port 12 of the submersible pump 10 in the bottomed vessel 20 Reduce. By doing so, fluctuation of the liquid level D of the water reservoir 3 can be reduced, and pumping and drainage can be stably continued. In some cases, as described above, it may be possible to select the control method so that ON-OFF control is performed clearly.

  The first depth D 1 is set between the height H of the upper edge 21 and the height U of the upper side 26 of the suction window 25. The second depth D2 is set between the height U of the upper side 26 of the suction window 25 and the height L of the lower side 27. If the water depth D of the water reservoir 3 is between the first depth D1 and the second depth D2, the operation of the submersible pump 10 is convenient, otherwise the operation of the submersible pump 10 is inconvenient. Hereinafter, in order to clarify the reason, the configuration, operation and effects of the device 90 will be described together.

  When the submersible pump 10 is installed in the water reservoir 3 of the turbid water 2 containing the obstruction-causing substance including the fibrous substance 1, the support device 90 directly exposes the suction port 12 to the intake of the obstruction-causing substance Not have a function to protect. The protective function of the suction port 12 is configured by gently covering the suction port 12 positioned below the submersible pump 10 with the bottomed container 20.

  The bottomed container 20 is preferably a bucket or drum-like, substantially cylindrical shape. The shape of the bottomed container 20 may be any shape as long as the upper edge 21 is released to form the opening 22 and the submersible pump 10 can be easily taken in and out from the opening 22 formed by the upper edge 21. As an example, a plastic bucket is adopted for this bottomed container 20, and in that case, it is excellent also in the processability at the time of drilling the suction window 25, and the ease of material procurement.

  The size and shape of the suction window 25 are not particularly limited as long as the strength of the bottomed container 20 can be maintained, but the above-described specifications apply to the heights U and L. Therefore, in the substantially cylindrical bottomed container 20, it is preferable that a plurality of vertically elongated rectangular suction windows 25 be provided at substantially equal intervals along the entire outer circumference. In that case, a portion corresponding to the window frame contributes to the shape maintenance of the bottomed container 20.

  Furthermore, the net 40 can be easily covered and fixed over the entire circumference of the outer periphery if the bottomed container 20 is substantially cylindrical regardless of the arrangement of the suction windows 25 and the shape of each of the suction windows 25 (FIG. 1A). Moreover, it is preferable because the protection function by the above-mentioned filter can be constituted only by doing so. That is why a plastic bucket is adopted as the material of the bottomed container 20.

  The height H of the bottomed container 20 is higher than the depth D of the water reservoir 3, and a suction window 25 is formed on the outer peripheral surface 23 of the bottomed container 20. At least the entire suction window 25 is covered by the net 40 without any gap. Since the openings of the net 40 are smaller than the size of the reinforcing fiber (fibrous material) 1, the passage of the fibrous material 1 can be blocked.

  A lift table 30 is provided on the bottom surface 28 of the bottomed container 20. The height G of the lifting table 30 is lower than the height H of the bottomed container 20. As a guide, the entire submersible pump 10 is accommodated in the bottomed container 20 larger than the submersible pump 10 main body. In addition, when the device 90 is used, a level meter (depth detection means) 50 that detects the depth D (liquid level) D of the water reservoir 3 juxtaposed to the device 90 and generates a signal is also used.

  The water reservoir 3 which is the target of pumping and draining in the present method has a property that its water size gradually increases if it is left as it is. Before the liquid level D of the water reservoir 3 reaches the upper edge 21 of the bottomed container 20, the pump drive control unit 60 operates the submersible pump 10. Here, the suction window 25 formed on the outer peripheral surface 23 of the submersible pump 10 housed in the device 90 is opened from the height U of the upper side 26 to the height L of the lower side 27. Since the water phase portion in the water reservoir 3 can flow into the bottomed container 20 from the suction window 25 opened in this manner, it does not hinder the lifting and draining operation.

  The submersible pump 10 used in the present method has the ability to lift and drain water exceeding the amount of water buildup of the water reservoir 3 as described above, so the liquid level D of the water reservoir 3 decreases while it is in operation. Then, before the liquid level D becomes lower than the suction port 12 of the submersible pump 10, the pump drive control unit 60 stops the submersible pump 10.

  The height H of the device 90 used in this method is higher than the depth D of the water reservoir 3 and the suction window 25 drilled on the outer peripheral surface 23 of the bottomed container 20 is larger than the size of the reinforcing fiber 1 A protective filter is formed covered with a net 40 with a small opening. Therefore, the reinforcement fiber 1 floating near the surrounding water surface is prevented from flowing into the turbid water 2 flowing from the suction window 25 into the bottomed container 20. Therefore, the failure caused by the reinforcement fiber 1 being sucked into the submersible pump 10 is also largely suppressed.

  On the other hand, as shown in FIG. 1 (A) and FIG. 4, solid precipitates 4 such as gravel and mud deposited in the vicinity of the bottom of the water reservoir 3 to be pumped and drained by this method The amount of penetration of the height H of the upper edge 21 into the suction port 12 of the submersible pump 10 is suppressed to a certain extent. Furthermore, the submersible pump 10 placed on the lifting table 30 of the instrument 90 is placed at a position where its suction port 12 is higher than the bottom of the water reservoir 3. For this reason, the absorption of sand and sediment deposited near the bottom of the water reservoir 3 is reduced.

  Therefore, as a function and effect of the present method, less material is generated to form a lump. As a result, since the formation of a lump is suppressed, the clogging of the drain pipe 14 can be prevented. For this reason, the cause of the formation of a lump, that is, the reinforcing fiber 1 and the solid precipitate 4 are simultaneously sent to the drain pipe 14 to suppress the formation of a lump. As a result, the clogging of the drain pipe 14 can be suppressed.

  As described above, there are conditions for enhancing the effect of suppressing the phenomenon in which the fibrous substance 1 and the solid precipitate 4 are drawn into the suction port 12 of the submerged pump 10. The condition is that the water depth D of the water reservoir 3 is located between the first depth D1 and the second depth D2. When this condition is satisfied, it is convenient for the operation of the submersible pump 10, and otherwise it is inconvenient for the operation of the submersible pump 10.

[Example]
In the embodiment, the submersible pump 10 is a vertical type for drainage of rainwater, spring water and stagnant water in civil engineering and construction work, and adopted model number KTV2-22 manufactured by Tsurumi Seisakusho. This is the following specification.
Diameter: 50 (mm), Discharge amount: 200 (L / min), Total head: 20 (m)
Power supply: Three-phase 200 (V), Frequency: 50 (Hz), Current: 8.5 (A), Output: 2.2 (kW)

  As shown in FIG. 1 (A) and FIG. 4, the submersible pump 10, the present device 90, the present system 100 and the present method using them were applied for drainage work. As a result, the blockade of the suction port 12 and the drain pipe 14 of the submersible pump 10 did not occur even once during the one-week drainage operation.

[Comparative example]
In the comparative example, although the submersible pump 10 commonly used the model number KTV2-22 used in the example, the present apparatus 90, the present system 100, and the present method using them are not applied, and it is shown in FIG. The drainage work was done as shown. As a result, an obstruction failure occurred in the suction port 12 of the submersible pump 10 at a frequency of twice a day, and the operation had to be interrupted. In addition, since the downstream drainage pipe 14 is also blocked, the operation is interrupted and periodical cleaning of the piping is necessary.

  The submersible pump support tool, the submersible pump support system, and the underground lifting and draining method using them according to the present invention may be employed in any resource mining mine.

  Although the embodiments and examples of the present invention have been described in detail as described above, it is apparent to those skilled in the art that many modifications can be made without departing substantially from the novel matters and effects of the present invention. It will be easy to understand. Accordingly, all such modifications are intended to be included within the scope of the present invention.

  For example, in the specification or the drawings, the terms described together with the broader or synonymous different terms at least once can be replaced with the different terms anywhere in the specification or the drawings. Further, the configuration and operation of the submersible pump support tool, the submersible pump, the depth detection means, and the pump drive control unit are not limited to those described in the embodiments and examples of the present invention, and various modifications can be made. It is.

Reference Signs List 1 reinforcement fiber (fibrous substance), 2 turbid water, 3 (inside a well) pool, 4 solid precipitate, 10 submersible pump, 11 (submersible pump 10) bottom surface, 12 inlet, 13 (submersible pump 10) spout Outlet, 14 (submersible pump 10) drainage pipe, 20 bottomed container, 21 upper edge, 22 opening, 23 (bottomed container 20) side or outer peripheral surface, 24 (of bottomed container 20) outer bottom surface, 25 suction Window, 26 (Suction window 25) upper side, 27 (Suction window 25) lower side, 28 (bottomed container 20) inside bottom surface, 30 Lifting platform, 31 poly pipe, 32 vinyl tape, 40 net, 50 depth detection Means, 60 pump drive control unit, 90 submersible pump support tool (this tool), 100 submersible pump support system (this system), G bottom raising height, D (for water pool 3) depth, D1 first 1 depth, D2 second depth, H (upper edge 21) height, L (lower edge 27 of suction window 25) height, S (light of depth detection means 50) signal, U (intake window 25 Height of the upper side 26)

Claims (8)

A submersible pump support tool for supporting the function of a vertical submersible pump for draining or pumping turbid water containing fibrous material, comprising:
A bottomed container having an opening formed at the upper edge to facilitate taking in and out of the submersible pump;
A lift base for defining the storage position and posture of the submersible pump housed inside the bottomed container;
Equipped with
The side of the bottomed container is opened to a predetermined height from an outer bottom surface or an inner bottom surface, and a suction window capable of flowing in the turbid water is opened.
The net is spread without gaps on at least the opening face of the suction window,
The openings of the net are sized to block passage of the fibrous material,
Submersible pump support equipment. The height of the upper edge is higher than the depth of the turbid water to be drained or pumped,
The lifting platform is
Between the inner bottom surface of the bottomed container and the bottom surface of the submersible pump, a predetermined bottom lifting height is set.
The bottom raising height is set to a position lower than the height of the upper edge,
The submersible pump support device according to claim 1. The bottomed container is formed by drilling the suction window in a bucket,
The lifting table is constructed by bundling pipes cut to a length corresponding to the lifting height,
The net is formed of a polyethylene net,
Submersible pump support instrument according to claim 1 or 2. The fibrous substance is a fiber sprayed on the inner wall of a tunnel together with a wall protective material for reinforcement.
The submersible pump support instrument according to any one of claims 1 to 3. A submersible pump support system using the submersible pump support device according to any one of claims 1 to 4, comprising:
With the submersible pump supporting device containing the submersible pump installed in a puddle,
A pump drive control unit that controls driving and stopping of the submersible pump;
Depth detection means for detecting the water depth by juxtaposing to the water reservoir and generating a depth signal corresponding to each case when the first depth and the second depth set in advance are reached;
Equipped with
The first depth is set between the height of the upper edge and the height of the upper side of the suction window,
The second depth is set between the height of the upper side and the height of the lower side of the suction window,
The pump drive control unit outputs the submersible pump when the water depth of the water reservoir is rising while exceeding the first depth before reaching the upper edge based on the depth signal generated by the depth detection unit. While raising the water level, conversely, while the water depth is decreasing, the power of the submersible pump is reduced if the second depth before becoming lower than the height of the suction port of the submersible pump in the bottomed container is reduced,
Submersible pump support system. The pump drive control unit operates the submersible pump when the water depth of the water reservoir is rising while the water depth of the water reservoir is rising based on the depth signal generated by the depth detection means, and conversely, the water depth is Stopping the submersible pump if it falls below the second depth during descent,
The submersible pump support system according to claim 5. A method for raising and dewatering a mine, which uses the submersible pump support device according to any one of claims 1 to 4 to drain or pump turbid water containing fibrous material from a puddle in a well,
With the submersible pump housed in the submersible pump support device,
While installing the above-mentioned submersible pump support equipment in a puddle,
Depth detection means for detecting a depth of the water reservoir and generating a depth signal according to each case when the first depth and the second depth set in advance are reached;
The first depth is set between the height of the upper edge and the height of the upper side of the suction window,
The second depth is set between the height of the upper side and the height of the lower side of the suction window,
Based on the depth signal emitted by the depth detection means, the output of the submersible pump is increased when the depth of the water reservoir is rising while exceeding the first depth before reaching the upper edge, and conversely, the depth is increased. While the water depth is decreasing, the power of the submersible pump is reduced when the second depth before being lower than the height of the suction port of the submersible pump in the bottomed container is reduced,
Underground pumping method. The submersible pump is operated when the water depth of the water reservoir exceeds the first depth while rising, and conversely, the submersible pump is stopped when the water depth falls below the second depth while falling.
The method for underground pumping and drainage according to claim 7.